CONTROL SCHEME FOR SELECTIVE USE AND APPLICATION OF A SIGNAL

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable.

BACKGROUND
Field of the Disclosure

This disclosure generally pertains to a control scheme for selective use and application of a signal, with related apparatuses, methods, and systems. More specifically, the disclosure relates to a control scheme used to facilitate continuous use of an industrial operation even if different modes or configurations are selected.

Background of the Disclosure

Control systems or schemes are used in every day walks of life. For example, in the home the selective turning of a controller (handle) one way or the other determines whether a user gets a hot shower or a cold shower. Or pushing an arrow button up or down determines how loud the television gets.

Control schemes also enhance production, efficiency and safety in many commercial industries, such as agriculture, energy, and heavy machinery. In certain instances, an industrial operation may be controlled to provide different forms of output. For example, a pump can be controlled to operate at different impeller speeds in order to increase or decrease fluid pressure.

A particular industry of interest is abrasive blasting. Conventional blasting is the process of forcibly propelling a high pressure, high velocity stream of abrasive material against a surface. Dry media blasting systems have proven to be very effective, but such systems are prone to release of blast media or dust into the surrounding area during operation. Wet media blasters have been created to minimize the generation of airborne media during blasting operations.

Today, there are units that provide selective modes of operation that include dry blast, wet blast, and combinations thereof. However, such units lack any ability or control scheme to provide continuous operation while switching modes.

There is a need in the art for a control scheme that facilitates easy use and operation of an applicable operation. There is a particular need for a control scheme that allows continuous operation while switching between one or more modes or configurations, such as that used with a deadman assembly for abrasive blasting.

SUMMARY

Embodiments of the disclosure pertain to a control scheme suitable for any kind operation or application that may be used in different (selectable) modes.

Embodiments of the disclosure pertain a control scheme for directing an input signal. The control scheme may have a first or signal portion. The scheme may have a second or vent portion. The first portion may be in selective communication with the second portion. The scheme may have a mode selector operatively linked with the first portion and/or the second portion.

In aspects, the mode selector may be used to select a first configuration whereby the input signal transfers through the first portion to a first control device. The input signal may be prevented from transferring through the second portion. The mode selector may be used to select another configuration whereby the input signal now transfers through the first portion to another control device. The mode selector may be used to select yet another or third configuration whereby the input signal now transfers through the first portion to yet another or a third control device.

The first portion may include a single-path selection configuration, such as an ‘elbow’. The second portion may include a multi-path selection configuration, such as a ‘T’. The first portion and the second portion may be operatively linked together and/or with the mode selector.

After the mode selector is used to select any new configuration, a remnant signal used to select a prior configuration may no longer be prevented from transferring through the second portion.

The mode selector may be operable to simultaneously change the configuration of the first portion and the second portion. Any of the control devices may be a valve. The first portion and the second portion may be together as part of a single component, or may not be together as part of a single component.

The mode selector may be used to select a new or another configuration whereby the input signal now transfers through the first portion to activate a new or another control device as well as any additional device; however, at the same time a prior or first control device may be deactivated.

Other embodiments of the disclosure pertain to an abrasive blasting system operable in at least two modes, which may include: blow off or air only, washdown or water only, wet blast, dry blast, and combinations thereof.

A control scheme may be used to select which mode the system operates in. The control scheme may include any of: a signal portion; a vent portion (which may be in selective communication with the signal portion); and a mode selector. The mode selector may be operatively linked with the signal portion and/or the vent portion. The mode selector may be a knob or other type of hand-movable component.

The mode selector may be used to select a first scheme configuration whereby the input signal transfers through the signal portion to a first control device, but is prevented from transferring through the vent portion.

These and other embodiments, features and advantages will be apparent in the following detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

A full understanding of embodiments disclosed herein is obtained from the detailed description of the disclosure presented herein below, and the accompanying drawings, which are given by way of illustration only and are not intended to be limitative of the present embodiments, and wherein:

FIG. 1A shows a simplified block flow diagram of a control scheme according to embodiments of the disclosure;

FIG. 1B shows a position diagram of the control scheme of FIG. 1A in a first configuration according to embodiments of the disclosure;

FIG. 1C shows a position diagram of the control scheme of FIG. 1A in a second configuration according to embodiments of the disclosure;

FIG. 1D shows a position diagram of the control scheme of FIG. 1A in a third configuration according to embodiments of the disclosure;

FIG. 2A shows a simplified block flow diagram of an alternative control scheme according to embodiments of the disclosure;

FIG. 2B shows a position diagram of the control scheme of FIG. 2A in a first configuration according to embodiments of the disclosure;

FIG. 2C shows a position diagram of the control scheme of FIG. 2A in a second configuration according to embodiments of the disclosure;

FIG. 2D shows a position diagram of the control scheme of FIG. 2A in a third configuration according to embodiments of the disclosure;

FIG. 2E shows a position diagram of the control scheme of FIG. 2A in a fourth configuration according to embodiments of the disclosure;

FIG. 3A shows a system component flow diagram of an abrasive blasting system according to embodiments of the disclosure;

FIG. 3B shows a process schematic diagram of an abrasive blasting system having a control scheme according to embodiments of the disclosure;

FIG. 4A shows a system schematic diagram of an operable system having a control scheme in a first configuration according to embodiments of the disclosure;

FIG. 4B shows the diagram of FIG. 4A with the control scheme in a second configuration according to embodiments of the disclosure;

FIG. 4C shows the diagram of FIG. 4A with the control scheme in a third configuration according to embodiments of the disclosure;

FIG. 5A shows a system schematic diagram of an operable system having a control scheme in a first configuration according to embodiments of the disclosure;

FIG. 5B shows the diagram of FIG. 5A with the control scheme in a second configuration according to embodiments of the disclosure;

FIG. 5C shows the diagram of FIG. 5A with the control scheme in a third configuration according to embodiments of the disclosure; and

FIG. 5D shows the diagram of FIG. 5A with the control scheme in a fourth configuration according to embodiments of the disclosure.

DETAILED DESCRIPTION

Regardless of whether presently claimed herein or in another application related to or from this application, herein disclosed are novel apparatuses, units, systems, and methods that pertain to a control scheme for use with any type of operation, such as a non-limiting example abrasive blasting, details of which are described herein.

Embodiments of the present disclosure are described in detail with reference to the accompanying Figures. In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, such as to mean, for example, “including, but not limited to . . . ”. While the disclosure may be described with reference to relevant apparatuses, systems, and methods, it should be understood that the disclosure is not limited to the specific embodiments shown or described. Rather, one skilled in the art will appreciate that a variety of configurations may be implemented in accordance with embodiments herein.

Although not necessary, like elements in the various figures may be denoted by like reference numerals for consistency and ease of understanding. Numerous specific details are set forth in order to provide a more thorough understanding of the disclosure; however, it will be apparent to one of ordinary skill in the art that the embodiments disclosed herein may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description. Directional terms, such as “above,” “below,” “upper,” “lower,” “front,” “back,” etc., are used for convenience and to refer to general direction and/or orientation, and are only intended for illustrative purposes only, and not to limit the disclosure.

Connection(s), couplings, or other forms of contact between parts, components, and so forth may include conventional items, such as lubricant, additional sealing materials, such as a gasket between flanges, PTFE between threads, and the like. Various equipment may be in fluid communication directly or indirectly with other equipment. Fluid communication may occur via one or more transfer lines and respective connectors, couplings, valving, piping, and so forth. Fluid movers, such as pumps, may be utilized as would be apparent to one of skill in the art.

Numerical ranges in this disclosure may be approximate, and thus may include values outside of the range unless otherwise indicated. Numerical ranges include all values from and including the expressed lower and the upper values, in increments of smaller units. As an example, if a compositional, physical or other property, such as, for example, molecular weight, viscosity, melt index, etc., is from 100 to 1,000, it is intended that all individual values, such as 100, 101, 102, etc., and sub ranges, such as 100 to 144, 155 to 170, 197 to 200, etc., are expressly enumerated. It is intended that decimals or fractions thereof be included. For ranges containing values which are less than one or containing fractional numbers greater than one (e.g., 1.1, 1.5, etc.), smaller units may be considered to be 0.0001, 0.001, 0.01, 0.1, etc. as appropriate. These are only examples of what is specifically intended, and all possible combinations of numerical values between the lowest value and the highest value enumerated, are to be considered to be expressly stated in this disclosure. Numerical ranges are provided within this disclosure for, among other things, the relative amount of reactants, surfactants, catalysts, etc. by itself or in a mixture or mass, and various temperature and other process parameters.

Without limitation otherwise, the make and manufacture of any particular component, subcomponent, etc., described herein may be as would be apparent to one of skill in the art, such as molding, forming, press extrusion, machining, additive manufacturing, etc. Components, subcomponents, etc. may be metallic, plastic, composite, and so forth, and need not all be of the same material. Embodiments of the disclosure provide for one or more components to be new, used, and/or retrofitted to existing machines and systems.

For any embodiment of the disclosure, associated or auxiliary equipment including automation, controllers, piping, hosing, valves, wiring, nozzles, pumps, gearing, tanks, etc. may be shown only in part, or may not be shown or described, as one of skill in the art would have an understanding of coupling the components for operation thereof. Any component herein that utilizes power or automation may be provided with wiring, tubing, piping, etc. in order to be operable.

Terms

The term “connected” as used herein may refer to a connection between a respective component (or subcomponent) and another component (or another subcomponent), which may be fixed, movable, direct, indirect, and analogous to engaged, coupled, disposed, etc., and may be by screw, nut/bolt, weld, and so forth. Any use of any form of the terms “connect”, “engage”, “couple”, “attach”, “mount”, etc. or any other term describing an interaction between elements is not meant to limit the interaction to direct interaction between the elements and may also include indirect interaction between the elements described.

The term “pipe”, “conduit”, “line”, “tubular”, “hose”, or the like as used herein may refer to any fluid transmission means, and may (but need not) be tubular in nature. The term may also apply to other forms of transmission, such as electrical.

The term “control scheme” as used herein may refer to the ability to control one or more signals, which may be via a device or apparatus (or more than one) in operable communication with other (sub) components. The control scheme may be controlled manually, automatically, or combination thereof. The control scheme may be used to determine use of, or facilitate directing, a signal, which may effect a configuration or mode of operation.

The term “composition” or “composition of matter” as used herein may refer to one or more ingredients, components, constituents, etc. that make up a material (or material of construction). Composition may refer to a flow stream of one or more chemical components.

The term “utility fluid” as used herein may refer to a fluid used in connection with the operation of an abrasive blasting device, such as a grit (sand), air, or water. The utility fluid may be for blasting, heating, cooling, or other type of utility. ‘Utility fluid’ may also be referred to and interchangeable with ‘service fluid’ or comparable.

The term “mounted” as used herein may refer to a connection between a respective component (or subcomponent) and another component (or another subcomponent), which may be fixed, movable, direct, indirect, and analogous to engaged, coupled, disposed, etc., and may be by screw, nut/bolt, weld, and so forth.

The term “non-emergency release” as used herein may refer to a voluntary release of a trigger/level mechanism of a deadman assembly in order to accomplish some other task, such as a break for shift change, a meal, or visit to a restroom, or to reposition for blasting a new area.

The term “deadman” as used herein may refer to an operable system or assembly utilizing some form of switch or comparable mechanism that, upon release of the ‘deadman’, results in shutdown. With respect to a blasting operation, release of the deadman may refer to a shutdown of media transfer through a blast line.

The term “control valve” as used herein may refer to a valve configured to control flow of a fluid, a solid, a slurry, etc. through the valve by varying the size of the flow passage as directed by a signal from a controller. The opening or closing of a control valve may be by electrical, hydraulic, or pneumatic actuators, or the like. The control valve may receive a signal from a deadman assembly in order to control other valves such as metering, combination or air valves.

The term “pneumatic” as used herein may refer to a device or piece of equipment operable or otherwise responsive to some form of air (or other suitable gas) pressure. A signal or input signal may be air/pneumatic.

The term “metering valve” as used herein may refer to a type of valve associated with a solid, such as sand, grit, and the like. Such a valve may be multi-function. For example, the metering valve may control flow of the solid into a compressed air stream. Another function may be to regulate the solid flow by changing the orifice size in the valve body. The larger the orifice the greater the solids flow. The metering valve may be a media valve.

The term “machined” may refer to a computer numerical control (CNC) process whereby a robot or machinist runs computer-operated equipment to create machine parts, tools and the like.

Referring now to FIGS. 1A, 1B, 1C, and 1D together, a simplified block flow diagram of a control scheme, a position diagram of the control scheme in a first configuration, a position diagram of the control scheme in a second configuration, and a position diagram of the control scheme in a third configuration, respectively, illustrative of embodiments disclosed herein, is shown.

FIGS. 1A-1D together illustrate a control scheme (or sometimes system) 101 that may be useful to determine use of, or facilitate directing, one or more signals. The control scheme 101 may include one or more devices in operable communication together with other devices, (sub) components, etc.

Although not limited to any particular type of signal usage, the control scheme 101 may be fluidic (e.g., pneumatic) in nature (others such as hydraulic, electric, etc. are possible). As such, there may be an input signal 172a (such as air) transferred from a signal source 172 to the scheme 101. In embodiments, the signal source 172 may be a pressurized tank configured for the transfer of the input signal 172a therefrom.

The input signal 172a may be received by a first or signal portion 162. What happens with the input signal 172a may be dependent upon the mode or configuration the scheme 101 is in (with reference to FIGS. 1B-1D and accompanying explanation herein for general understanding).

The first portion 162 of the control scheme 101 may be in operable communication with a second or vent portion 164. The first portion 162 may be (directly or indirectly) mechanically coupled or linked with the second portion (see linkage 165), yet at the same time fluidly isolated. That is, although the signal 172a be received by the first portion 162, the signal 172a may be prevented or isolated from at the same time being received by and passed through the second portion 164.

On the other hand, there may be a time when a remnant signal 172b may be passed through or vented out of the second portion 164. A remnant signal 172b may exist or begin to exist the moment the configuration or mode of the scheme 101 changes. Regardless of the configuration of the scheme 101, the respective remnant signal 172b may be transferred out of the scheme via an outlet or vent 174. As shown in FIG. 1B-1D, regardless of configuration, the outlet 174 remains open and unimpinged. This may result in a component operably coupled with the scheme 101 going from an activated position to a deactivated position.

A mode selector 168 may be used to change the configuration of the scheme 101, such as from a first configuration 101a to a second configuration 101b. The mode selector 168 may be used to change the scheme from the second configuration 101b to another configuration, such as back to the first configuration 101a or a third configuration 101c.

The mode selector 168 may be operably coupled with one or both of the first portion 162 and the second portion 164, such as via linkage 165. The linkage 165 may be any device or the like, such as mechanical coupling, suitable to affect the configuration of the scheme 101 (and respective portions 162, 164). The mode selector 168 may include a knob, a dial, or the like suitable for manual (hand) interaction and changing the configuration. The mode selector 168 may be associated with a GUI or other form of computer or automated interaction.

As mentioned, the configuration of the scheme 101 may be used to determine where the (input) signal 172a goes to. For example, the scheme 101 may have on or more outlets or ports for conveying or passing the signal 172a thereout. The signal 172a may be transferred from the scheme 101 to one or more (downstream) devices. As shown here, there may be a first device 170a in (fluid) communication with the control scheme 101.

Although not limited to any particular number, there may be other devices associated (in fluid communication) with the control scheme, such as a second device 170b and a third device 170c. Any of the devices 170a, 170b, 170c may be contemplated as a control device, in that upon receipt of the signal 172a, the device may have a direct or indirect control on some other form of downstream effect. For example, the devices 170a, 170b, 170c may be control valves or comparable. One or more of the devices 170a, 170b, 170c may be pneumatically operable, such as with an activation position or setting and a deactivation position/setting.

While the signal 172a may be conveyed to a respective device, the signal 172a may also be branched or conveyed back to the control scheme 101 (and the second portion 164). As such, any of the devices 170a, 170b, 170c, may be associated with a respective junction or branch. For example, there may be a first junction 166a, a second junction 166b, and a third junction 166c. While the junctions 166a, 166b, 166c may provide ability for the signal 172a to arrive at the second portion 164, the signal 172a may be prevented from passing through the second portion (unless or until the configuration changes).

The control scheme 101 may be used to selectively activate any associated device. As shown in FIG. 1B, the control scheme 101 may have the first configuration 101a that establishes a selective flowpath 162a through the first portion 162. The first configuration 101a may be established by the mode selector 168. In this configuration, the signal 172a may be passed or transferred (akin to an output or transfer signal via 1A1) to the junction 166a, and then to one or both of the first control device 170a and the second portion 164. One of skill would appreciate that the flow path 172a established for the first configuration 101a does not permit or allow the signal 172a to go to any other device.

The mode selector 168 may be used to select the second configuration 101b. In embodiments, the mode selector 168 may be used to move the scheme from a prior configuration (such as 101a or 101c) to the second configuration 101b. As shown in FIG. 1C, the second configuration 101b may change or establish the flow path 162a for the signal 172a to selectively pass or transfer (akin to an output or transfer signal via 1B1) to the second junction 166b, and thereafter to either or both of the second control device 170b and back to the control scheme 101; however, the signal 172a may be blocked or prohibited from passing through the second portion 164 because a second portion flow path 164a has now been established that only permits passing or transfer of any remnant signal 172b (e.g., an activation signal from a prior configuration) to vent 174. In the second configuration 101b, the second device 170b may be activated, and other devices may be deactivated (via loss of activation signal).

The mode selector 168 may be used to select the third configuration 101c. In embodiments, the mode selector 168 may be used to move the scheme from a prior configuration (such as 101a or 101b) to the third configuration 101c. As shown in FIG. 1D, the third configuration 101c may establish the flow path 162a for the signal 172a to selectively pass or transfer (akin to an output or transfer signal via 1C1) to the third junction 166c, and thereafter to either or both of the third control device 170c and back to the control scheme 101; however, the signal 172a may be blocked or prohibited from passing through the second portion 164 because a second portion flow path 164a has now been established that only permits passing or transfer of any remnant signal 172b (e.g., an activation signal from a prior configuration). In the third configuration 101c, the third device 170c may be activated, and other devices may be deactivated (via loss of activation signal). As one of skill would appreciate, no matter the configuration of the scheme 101, the vent 174 may always be used to pass any remnant signal 172b out of the scheme 101, and therefor permit selective deactivation of any associated device.

Referring now to FIGS. 2A, 2B, 2C, 2D, and 2E together, a simplified block flow diagram of a control scheme, a position diagram of the control scheme in a first configuration, a position diagram of the control scheme in a second configuration, a position diagram of the control scheme in a third configuration, and a position diagram of the control scheme in a fourth configuration, respectively, illustrative of embodiments disclosed herein, is shown.

While it need not be exactly the same, a control scheme (or sometimes alternative control scheme or system) 201 may be like that of scheme 101, etc., and operations or components thereof may be duplicate or analogous. Thus, only a brief discussion of the scheme 201 may be provided, recognizing that differences, if any, would be discernable by one of skill in the art, especially in view of the present disclosure.

FIGS. 2A-2E together illustrate the control scheme 201 that may be useful to determine use of, or facilitate directing, one or more signals. The control scheme 201 may include one or more devices in operable communication together with other devices, (sub) components, etc.

There may be an input signal 272a (such as air) transferred from a signal source 272 to the scheme 201. In embodiments, the signal source 272 may be a pressurized tank configured for the transfer of the input signal 272a therefrom.

The input signal 272a may be received by a first or signal portion 262. What happens with the input signal 272a may be dependent upon the mode or configuration the scheme 201 is in (with reference to FIGS. 2B-2E and accompanying explanation herein for general understanding).

The first portion 262 of the control scheme 201 may be in operable communication with a second or vent portion 264. The first portion 262 may be mechanically coupled or linked with the second portion (see linkage 265), yet at the same time (fluidly) isolated therefrom. That is, although the signal 272a may be received by the first portion 262, the signal 272a may be prevented or isolated from at the same time being (simultaneously) received by and passed through the second portion 264.

On the other hand, there may be a time when a remnant signal 272b may be passed through or vented out of the second portion 264. A remnant signal 272b may exist or begin to exist the moment the configuration of the scheme 201 changes. The remnant signal of the disclosure may be leftover air or voltage, for example, of a prior signal 272a. A mode selector 268 may be used to change the configuration of the scheme 201, such as from a first configuration 201a to a second configuration 201b. The mode selector 268 may be used to change the scheme from the second configuration 201b to another configuration, such as back to the first configuration 201a or another configuration 201c, 201d, etc.

The mode selector 268 may be operably coupled with one or both of the first portion 262 and the second portion 264, such as via linkage 265. The linkage 265 may be any device or the like, such as mechanical coupling, suitable to affect the configuration of the scheme 201 (and respective portions 262, 264). The mode selector 268 may include a knob, a dial, or the like suitable for manual interaction and changing the configuration. The mode selector 268 may be associated with a GUI or other form of computer or automated interaction.

As mentioned, the configuration of the scheme 201 may be used to determine where the (input) signal 272a goes to. For example, the scheme 201 may have on or more outlets or ports for conveying or passing the signal 272a thereto. The signal 272a may be transferred from the scheme 201 to one or more (downstream) devices. As shown here, there may be a first device 270a in (fluid) communication with the control scheme 201.

Although not limited to any particular number, there may be other devices associated (in fluid communication) with the control scheme, such as a second device 270b, a third device 270c, a fourth device, 270d, and a fifth device 270e, etc. Any of the devices (270a-270e) may be contemplated as a control device, in that upon receipt of the signal 272a, the device may have a direct or indirect control on some other form of downstream effect. For example, the devices (270a-270e) may be control valves or comparable. One or more of the devices (270a-270e) may be pneumatic. Any of the devices may have a respective activation and/or deactivation setting.

While the signal 272a may be conveyed to a respective device, the signal 272a may also be branched or conveyed back to the control scheme 201 (and the second portion 264). As such, any of the devices (270a-270e) may be associated with a respective junction or branch. For example, there may be a first junction 266a, a second junction 266b, and a third junction 266c. While the junctions 266a, 266b, 266c may provide ability for the signal 272a to arrive at the second portion 264, the signal 272a may be (simultaneously) prevented from passing through the second portion (unless or until the configuration changes).

The control scheme 201 may be used for selective activation and/or deactivation of any associated device. As shown in FIG. 2B, the control scheme 201 may have the first configuration 201a that establishes a selective flowpath 262a through the first portion 262. The first configuration 201a may be established by the mode selector 268. In this configuration, the signal 272a may be passed or transferred (akin to an output or transfer signal via 2A1) to the junction 266a, and then to one or both of the first control device 270a and the second portion 264. One of skill would appreciate that the flow path 262a established for the first configuration 201a is single-path (in contrast to the multi-path arrangement of the second portion 264).

The mode selector 268 may be used to select the second configuration 201b. In embodiments, the mode selector 268 may be used to move the scheme from a prior configuration (such as 201a or 201c) to the second configuration 201b. As shown in FIG. 2C, the second configuration 201b may change or establish the flow path 262a for the signal 272a to selectively pass or transfer (akin to an output or transfer signal via 2B1) to the second junction 266b, and thereafter to either or both of the second control device 270b and back to the control scheme 201; however, the signal 272a may be blocked or prohibited from passing through the second portion 264 because a second portion flow path 264a has now been established that only permits passing or transfer of any remnant signal 272b (e.g., an activation signal from a prior configuration).

In the second configuration 201b, the second device 270b may be activated, and other devices may be deactivated (via loss of activation signal). FIG. 2A further shows that in this second configuration, the signal 272a may also transfer to another device, such as the fourth control device 270e. As such, depending on configuration, it may be the case that the control scheme 201 may be used to activate more than one control device for the respective configuration.

The mode selector 268 may be used to select the third configuration 201c. In embodiments, the mode selector 268 may be used to move the scheme from a prior configuration (such as 201b or 201d) to the third configuration 201c. As shown in FIG. 2D, the third configuration 201c may establish the flow path 262a for the signal 272a to selectively pass or transfer (akin to an output or transfer signal via 2C1) to the third junction 266c, and thereafter to either or both of the third control device 270c and back to the control scheme 201; however, the signal 272a may be blocked or prohibited from passing through the second portion 264 because a second portion flow path 264a has now been established that only permits passing or transfer of any remnant signal 272b (e.g., an activation signal from a prior configuration) to vent 274. In the third configuration 201c, the third device 210c may be activated, and other devices may be deactivated (via loss of activation signal).

Regardless of the configuration 201a-201c of the scheme 201, the remnant signal 272b may be transferred out of the scheme via an outlet or vent 274. As shown in FIG. 2B-2D, regardless of configuration, the outlet 274 remains open and unimpinged.

However, it may be the case that the outlet 274 is not accessible. As such, one of the control devices 270a-270e may be configured as an alternative vent device. For example, the fifth control device 270e may be a valve with a normally vent position. That is, unless the device 270e receives a suitable or sufficient activation signal, the device 270e remains deactive, and able to provide vent.

In the second configuration, the signal 272a (which may be, for example, of suitable pressure to exceed an activating pressure setting) may open or activate the second device 270b, and at the same time, activating 270e. When a fourth configuration 201d is selected (for example, switching from the third to the fourth), remnant signal from 2C1 may be vented into lines 2B1 and 2A1, lowering the pressure below the activation pressure of devices 270b and 270e. As such, devices 270b and 270e are not activated, and 270e remains or goes inactive to its vent position, resulting in venting the remnant signal 2C1 therefrom.

At the same time, the fourth reconfiguration 201d may result in the flowpath for the outlet 274 closed or shut. As such, although the mode selector 268 may be used to select the fourth configuration 201d, a different flowpath (e.g., 2C1 to 2B1 to 270e) for any remnant signal 272b may be used. In embodiments, the mode selector 268 may be used to move the scheme from a prior configuration (such as 201b or 201c) to the fourth configuration 201d.

As shown in FIG. 2E, the fourth configuration 201d may establish the flow path 262a for the signal 272a to selectively pass or transfer (akin to an output or transfer signal via 2D1) to a fourth control device 270d. The signal 272a need not have a path back to the control scheme 201; however, remnant signal 272b may also be blocked or prohibited from passing through the second portion 264 because a vent path has not been established that permits passing or transfer of any remnant signal 272b (e.g., an activation signal from a prior configuration).

Instead, an alternative path 2B2a may be used to transfer or vent the remnant signal (via junctions 266b, 266b1 to a vent destination or device 270e. Thus, in the fourth configuration 201d, the fourth device 270d may be activated, and other devices may be deactivated (via loss of activation signal) via vent device 270e.

Referring now to FIGS. 3A and 3B, a system component flow diagram of an abrasive blasting system and a process schematic diagram of an abrasive blasting system having a control scheme, respectively, illustrative of embodiments disclosed herein, are shown.

FIGS. 3A and 3B together show a hybrid component-flow (and related schematic) diagram an abrasive blasting system 300 that may be comparable or identical in some aspects, function, operation, components, etc. as that of other system embodiments disclosed herein (e.g., 300, etc.), and analogous reference numbers may be used. Similarities may not be discussed for the sake of brevity, but may otherwise be evident to one of skill.

The abrasive blasting system 300 may be part of an overall skid, meaning that one or more components may be coupled with or otherwise disposed on a skid or support frame structure. This means the system 300 may be readily portable and easily moved from job site to job site. One of skill would appreciate the basic nature of the Figures may not show detail of valving, fittings, conduits, pumps, controls, etc. that might otherwise be present or necessary.

Although not required, the system 300 may be configured to provide single- or multi-mode functionality, which may include any of the following: no-flow; wet blast; dry blast; wash down; low pressure wash; blow down; air dry (air only); and so forth. The system 300 may be configured to be electrical, pneumatic, hydraulic, or as otherwise desired. The term ‘configuration’ may be used interchangeably to ‘mode’. For example, a first configuration may be a first mode of operation. Any configuration of the system 300 may include one or more components operable in a collective fashion to provide a desired result or output.

Whatever the operation needed, an operator 302 may interface with a control panel 318. The control panel 318 may have respective gauges or readouts operable to provide various system indications, such as pressure or flow rate. The control panel 318 may also have dials, knobs, etc. for the operator 302 to adjust or change flow rates, pressures, modes, etc.

The system 300 may be operable to provide a single medium or mixture of any of air, water, and/or abrasive. In embodiments, the blast mixture may include wet abrasive and compressed air that may be discharged from a blast nozzle 305 coupled at an end of a blast hose 304. The blast hose 304 may have its other end configured with a hose mating feature or coupler configured to engage a respective coupler 348b (e.g., flange) of the mixer (or mixer section) 310. In the event greater reach is needed, the hose 304 may have a hose extension coupled therewith.

The system 300 may be operable to provide a single medium or mixture of any of air 327, water 326, and/or abrasive 328. As such, depending on the mode selected, the blast stream 306 out of the nozzle 305 may be air, water, abrasive, or combinations thereof. While air and water or common, other gaseous or liquidous mediums are within the scope of the disclosure. Air may be used in wet blasting or dry blasting.

In embodiments, the blast stream 306 may include wet abrasive and compressed air that may be discharged from a blast nozzle 305 coupled at an end of a blast hose 304. The blast hose 304 may have its other end configured to engage a respective coupler 348b (e.g., flange) of a mixer or mixer section 310. The resultant blast stream 306 may be directed toward a target surface 308.

The mixer 310 may be passive in that a single material may pass therethrough (such as blowdown air). On the other hand, the mixer 310 may be contemplated as a focal point for the convergence of two or more of the air/water/abrasive mediums coming together for mixing. Just the same, the mixer 310 may also be contemplated as a mixing section having a first mixing portion 310a and a second mixing portion 310b. The first mixing portion 310a may be where air 327 and abrasive 328 mix together, which may then pass into the second mixing portion 310b to mix with water 326. The ‘portions’ 310a, b may be conduits, piping, valves, etc.

The pressurized air 327 may flow into and through the first mixing portion 310a picking up any released abrasive 328, exiting as an air/abrasive mix. This mix may then flow into and through the second mixing portion 310b. Depending on the mode of operation of the system 300, pressurized water 326 may be injected into the air/media mix by one or more injectors 325a, 325b, etc.

One of skill would appreciate that in a single mode of operation, mixing need not occur and the mixer 310 may be merely passive. Although not mean to be limited, the single mode of operation may be an air-only mode. As mentioned, water 326 from water source 311 may be injected or sprayed into the mixer 310 via the one or more injectors or spray nozzles 325a, 325b. Water flow 326 (via water feed 311a) from a water source 311 may be pressurized, such as via a water pump 333. Although not meant to be limited, the water pump 333 may be electrical or pneumatic.

In an electric configuration, the water pump 333 may have a set or constant flow rate. In a pneumatic configuration, the water pump 333 may be a reciprocating piston pump having a piston (not shown here) stroked via drive air. The water pump 333 may ported, and thus receive signal air via 312d. The flow rate characteristics of the pump 333 may be controlled via the air 312d, such as via changing the setting of a drive air pressure regulator 338. The regulator 338 may set or constant, or may be varied by changing a dial or other device on the control panel 318. The operation of the pump 333 may depend on the deadman assembly 315, as the signal air depends on whether the assembly 315 is engaged or not (such as from squeezing or releasing trigger member 340), as well as the setting of a mode selector 468.

Air flow may also be pressurized, such as via a compressor (not shown) and provided to the mixer 310 from an air source 312 via an auto air valve 322 and an (first) air injection conduit 312a. Abrasive blast media 328 may be provided into the blast media source 314 (which may be a blast pot). In operation, the media source 314 may be pressurized (such as with compressed air), which may facilitate transfer of the media 328 through media conduit 314a and a media valve 324. The media valve 324 may accommodate mixing of the abrasive media 328 and the air 327 upstream of the water injection (e.g., via injectors 325a, 325b). In aspects, the first mixing portion 310a may include the media valve 324.

Operation of any mode of the system 300 may commence when the deadman assembly 315 is engaged, with a particular mode being selected from the mode selector 368. The deadman assembly 315 (or respective wiring, tubing, twinline, networking, etc. 316) may be coupled (directly or indirectly) with the control panel 318, and thus also have an operable relationship with the mode selector 368.

The position of the mode selector 368 may determine what amount of air pressure is provided to the blast hose 304. For example, the wet blast mode may use blast air pressure regulator 342, and washdown mode may use wash down air regulator 343, as these modes might have different air pressure needs. The blast pressure regulator 342 and/or the wash down regulator 343 may determine the setting of air slave regulator 344.

In embodiments, wet blasting may occur when a pump power source (not viewable here) is turned on and the deadman 315 engaged, which may open (such as electrically or pneumatically) a main water control valve 335.

When a main or deadman control device 334 is activated via the deadman 315, a control signal may correspondingly activate (e.g., open) the automatic air valve 322. Compressed air 327 may then flow to pressurize the blast hose 304 when the automatic air valve 322 is activated. At the same time, the metering valve 324 and the water control valve 335 may activate or open, thereby allowing the abrasive 328 to fall through and/or water 326 to be injected into the air stream 327 flowing to mixer 310. Note that injector(s) 325a, 325b may be used in the respective blast/wash mode that requires water flow.

Operation of the system 300 may stop when the deadman assembly 315 is disengaged, and the signal is removed from the control device 334. The system 300 may include a control scheme 301, which may be like that of any control scheme embodiment of the disclosure, such as 101, 201, etc. The control scheme 301 may be interacted with by the operator 302 via the control panel 318 or other suitable interface.

Control Scheme and Configuration/Mode

Referring now to FIGS. 4A, 4B, and 4C, a system schematic diagram of an operable system having a control scheme in a first configuration, a system schematic diagram of an operable system having a control scheme in a second configuration, and a system schematic diagram of an operable system having a control scheme in a third configuration, respectively, illustrative of embodiments disclosed herein, are shown.

FIGS. 4A-4C together show a schematic diagram of a process, operation, system, etc. 400 that may be comparable or identical in some aspects, function, operation, components, etc. as that of other system embodiments disclosed herein (e.g., 300, etc.), and analogous reference numbers may be used. Similarities may not be discussed for the sake of brevity, but may otherwise be evident to one of skill.

Embodiments herein provide a user the ability to select a desired mode of operation via a mode selector 468 operatively coupled with a control scheme 401. The control scheme 401 may be used with any type of operation that changes a particular mode or configuration of the operation, especially in instances where it may be desired to keep an operation going without having to shut down in order to make the change.

The configuration or mode of the system 400 may be changed without having to release a deadman assembly 415. Although not limited, the modes of operation may include one or more of: blow off or air only; washdown or water only; wet blast; dry blast; wet dry blast, and so forth.

The system 400 may use the control scheme 401 to establish or facilitate use of an input signal 472a, which may depend on the mode desired or selected. A mode or configuration of the system 400 may correspond to a mode or configuration of the control scheme 401. Using the control scheme 401 to feed the input signal 472a in a first configuration may result in activation of a corresponding control device. In the same instant, a prior input signal may become a remnant signal that is removed, which may result in deactivation of a respective control device.

The schematic views of FIGS. 4A-4C show by way of example the system 400 may be used in operation with the control scheme 401 to switch from one mode to the other (which may occur while the deadman assembly 415 remains unreleased and activated). The solid black lines highlight changes in signal direction and use depending on the position/configuration of the mode selector 468, and related operation of the control scheme 401.

Referring now to FIGS. 5A, 5B, 5C, and 5D, a system schematic diagram of an operable system having a control scheme in a first configuration, a system schematic diagram of an operable system having a control scheme in a second configuration, a system schematic diagram of an operable system having a control scheme in a third configuration, and a system schematic diagram of an operable system having a control scheme in a third configuration, respectively, illustrative of embodiments disclosed herein, are shown.

FIGS. 5A-5D together show a schematic diagram of a process, operation, system, etc. 500 that may be comparable or identical in some aspects, function, operation, components, etc. as that of other system embodiments disclosed herein (e.g., 300, 400, etc.), and analogous reference numbers may be used. Similarities may not be discussed for the sake of brevity, but may otherwise be evident to one of skill.

Embodiments herein provide a user the ability to select a desired mode of operation via a mode selector 568 operatively coupled with a control scheme 501. The control scheme 501 may be used with any type of operation that changes a particular mode or configuration of the operation, especially in instances where it may be desired to keep an operation going without having to shut down in order to make the change.

The configuration or mode of the system 500 may be changed without having to release the deadman assembly 515. Although not limited, the modes of operation may include one or more of: blow off or air only; washdown or water only; wet blast; dry blast; wet dry blast, and so forth.

The system 500 may use the control scheme 501 to establish or facilitate use of an input signal 572a, which may depend on the mode desired or selected. A mode or configuration of the system 500 may correspond to a mode or configuration of the control scheme 501. Using the control scheme 501 to feed the input signal 572a in a first configuration may result in activation of a corresponding control device. In the same instant, a prior input signal may become a remnant signal that is removed, which may result in deactivation of a respective control device.

The schematic views of FIGS. 5A-5D show by way of example the system 500 may be used in operation with the control scheme 501 to switch from one mode to the another (which may occur while the deadman assembly 515 remains unreleased and activated). The solid black lines highlight changes in signal direction and use depending on the position of the mode selector 568, and related operation of the control scheme 501.

It may be the case that the control scheme 501 does not have an accessible outlet to vent a remnant signal. As such, one of the control devices 570e may be configured as an alternative vent device. For example, control device 570e may be a valve with a normally vent position. As such, unless the device 570e receives a suitable or sufficient activation signal, the device 570e remains deactivated, and thus able to provide vent.

In another configuration, the signal 572a (which may be, for example, of suitable pressure to exceed an activating pressure setting) may open or activate device 570e. When a new configuration is selected (for example, switching from the third to the fourth), remnant signal from may be vented, lowering the pressure below the activation pressure of device 570e. As such, the device 570e is not activated, and 570e remains or goes inactive to its vent position, resulting in venting the remnant signal therefrom.

Advantages

A control scheme of the present disclosure may allow for simultaneous or instantaneous change in vent and signal operation. That is, when a change to a new mode occurs via change in direction of an input signal, simultaneous to that is deactivation or ‘vent’ of the signal that previously activated the prior mode.

While preferred embodiments of the disclosure have been shown and described, modifications thereof may be made by one skilled in the art without departing from the spirit and teachings of the disclosure. The embodiments described herein are exemplary only and are not intended to be limiting. Many variations and modifications of the embodiments disclosed herein are possible and are within the scope of the disclosure. Where numerical ranges or limitations are expressly stated, such express ranges or limitations should be understood to include iterative ranges or limitations of like magnitude falling within the expressly stated ranges or limitations. The use of the term “optionally” with respect to any element of a claim is intended to mean that the subject element is required, or alternatively, is not required. Both alternatives are intended to be within the scope of the claim. Use of broader terms such as comprises, includes, having, etc. should be understood to provide support for narrower terms such as consisting of, consisting essentially of, comprised substantially of, and the like.

Accordingly, the scope of protection is not limited by the description set out above but is only limited by the claims which follow, that scope including all equivalents of the subject matter of the claims. Each and every claim is incorporated into the specification as an embodiment of the present disclosure. Thus, the claims are a further description and are an addition to the preferred embodiments of the present disclosure. The inclusion or discussion of a reference is not an admission that it is prior art to the present disclosure, especially any reference that may have a publication date after the priority date of this application. The disclosures of all patents, patent applications, and publications cited herein are hereby incorporated by reference, to the extent they provide background knowledge; or exemplary, procedural or other details supplementary to those set forth herein.

CONTROL SCHEME FOR SELECTIVE USE AND APPLICATION OF A SIGNAL

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