Patent Grant
9387950
1. Field of the Disclosure
The disclosure relates in general to bulk bag handling equipment, and more particularly, to a bulk bag discharge assembly that includes a conditioning assembly, with the conditioning assembly conditioning the contents of the bag in preparation for discharge.
2. Background Art
Bulk bag discharging systems have been used to transfer materials, usually raw materials, from one container into another without contaminating the materials. Generally, bulk bag discharging systems lift a material-containing bag into a dispensing position. Subsequently, the bag may be optionally coupled to outside structures on the frame of the discharge system, and emptied.
On occasion, there are products (i.e., contents) that are not readily dischargeable. For example, salt that is transported in a wet or humid environments may become hardened and extremely difficult to discharge from a bulk bag. The salt crystals bond to each other such that sizeable force is required to break apart or re-granulate the salt (i.e., condition the contents).
In such an instance it is advantageous to provide conditioning systems which apply forces to the outside of the bulk bag to condition the contents for discharge. Problematically, many of the conditioners that have been utilized have linear actuators that are fixedly mounted at a first end and a second end, such that the conditioners likewise travel in a linear path. As the bulk bag has uneven surfaces and great surface variations both in a single bulk bag and as between bulk bags, the actuators are often subjected to unbalanced loads and bending moments. Such bending moments can cause damage and premature failure of the actuators.
Certain solutions have been provided which overcome these deficiencies and provide for conditioning arms that swing in a pivoting manner. Generally, such swinging arms pivot about an axis and condition the bag prior to entry into the discharge assembly. It would be advantageous to provide for improved conditioning of a bulk bag that is hanging within a discharge assembly.
The disclosure is directed to a bulk bag discharge assembly comprising a main frame assembly and a bag conditioning assembly. The main frame assembly has a first end and a second end, and defines a bulk bag receiving region confined by thereby.
The bag conditioning assembly comprising a first conditioner frame and a powered cylinder. The first conditioner frame has a proximal end, a distal end and an impact face. The proximal end is pivotably coupled to the main frame assembly, with the distal end extending therefrom. The impact face spaced apart from the proximal end. The powered cylinder is pivotably coupled to the main frame assembly at a first end, and to the first conditioner frame at a second end, spaced apart from the proximal end thereof.
The powered cylinder is structurally configured to extend the first conditioner frame from outside of the bulk bag receiving region into the bulk bag receiving region. Within the bulk bag receiving region, the distal end of the first conditioner frame is directed at least partially in an upward direction, through a majority of the travel within the bulk bag receiving region.
In a preferred embodiment, the main frame further includes a discharge support base and an upper end, with the bulk bag receiving region extending above the discharge support base.
In another preferred embodiment, a hoist assembly is provided that is coupled to the main frame assembly proximate the upper end thereof. The hoist assembly is configured to position and retain a bulk bag within the bulk bag receiving region of the main frame assembly.
In another preferred embodiment, the hoist assembly further includes a hoist slidably positionable relative to the main frame assembly so as to facilitate translation of a bulk bag into and out of the bulk bag receiving region.
In a preferred embodiment, the bag conditioning assembly further comprises a second conditioner frame which is substantially identical to the first conditioner frame, and positioned on the opposite side of the bulk bag receiving region relative to the first conditioner frame.
In another preferred embodiment, the powered cylinders comprise hydraulic cylinders that provide a force of between 10,000 and 70,000 pounds.
In another preferred embodiment, the first conditioner frame includes a plurality of powered cylinders.
Preferably, in one such embodiment, the second conditioner frame includes a plurality of powered cylinders.
In a preferred embodiment, the proximal end of the conditioner frame is pivotably coupled to the frame at or below the discharge support base.
In some such embodiments, the proximal end of the conditioner frame is on one side of the bulk bag receiving region with the distal end of the conditioner frame being on an opposite side of the bulk bag receiving region.
Preferably, the assembly further includes a massaging frame assembly comprising a first massage frame and a second massage frame. The first massage frame has a proximal end pivotably coupled to the discharge support base and a distal end spaced apart therefrom. The second massage frame has a proximal end pivotably coupled to the discharge support base and a distal end spaced apart therefrom. The distal ends of each of the first and second massage frame extending in opposite directions. A pneumatic cylinder is pivotably coupled at a first end to the main frame assembly, and at a second end to a respective one of the first and second massage frame spaced apart from the proximal end thereof.
In a preferred embodiment, the assembly further comprises a material transport assembly having a central hub portion and a plurality of container support members extending therefrom. Each of the plurality of container support members configured to engage a loop from a bulk bag, so as to secure to the same.
In another preferred embodiment, the discharge and hoist assembly is configured for use with a bulk bag having a generally cubic configuration.
In a preferred embodiment, the assembly further includes a discharge assembly positioned proximate the discharge support base. The discharge assembly has an opening through which contents from a bulk bag can be discharged.
In a preferred embodiment, the powered cylinder is structurally configured to extend the first conditioner frame from within the outside of the bulk bag receiving region into the bulk bag receiving region, whereupon entry into the bulk bag receiving region, the distal end of the first conditioner frame is directed at least partially in an upward direction.
In another preferred embodiment, the bag conditioning assembly is slidably positionable relative to the main frame assembly so as to slidably translate therealong between the first and second end thereof.
In another preferred embodiment, a first and second conditioner frame can be coupled together between a first and second end thereof through a powered cylinder so that articulation by the powered cylinder serves to rotate both of the first and second conditioner frames about their first ends.
The disclosure will now be described with reference to the drawings wherein:
While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and described herein in detail a specific embodiment with the understanding that the present disclosure is to be considered as an exemplification and is not intended to be limited to the embodiment illustrated.
It will be understood that like or analogous elements and/or components, referred to herein, may be identified throughout the drawings by like reference characters. In addition, it will be understood that the drawings are merely schematic representations of the invention, and some of the components may have been distorted from actual scale for purposes of pictorial clarity.
Referring now to the drawings and in particular to
The main frame assembly 12 comprises perimeter pieces 20, cross support members 22, discharge base 24 and hoist support 26. The main frame assembly extends from base region 21 to upper end 23. The perimeter pieces 20 typically comprises about three inch to about four inch diameter square tubing having about ¼ inch to about ⅝ inch thick walls, while other materials are contemplated. The perimeter pieces 20 are typically continuously welded with one another to provide added strength. The cross support members 22 are typically about 1½ by 1½ by about 1½ inch square metal segments. The cross support members 22 are typically continuously welded to the other portions of the main frame assembly 12 to provide optimum strength. While not preferred, the cross support members 34 may be anchored to the structural members by any other suitable means, such as bolts and angle irons.
The discharge support base 24 is positioned between the base region 21 and the upper end 23. As will be explained, the discharge support base 24 forms the base upon which the discharge assembly is positioned, and in the embodiment shown, is much like the cross support members 22. There is no particular orientation and position for the discharge support base, however, in many embodiments, the discharges support base is spaced apart from the base region so that the discharge assembly is spaced from the ground or other outside surface for ease of accessibility.
The discharge support base 24, along with the perimeter pieces serves to define the receiving region of the bag and the footprint area of the bag. The receiving region of the bag extends from the hoist to the discharge support base 24 (as the bag can be raised, lowered and rotated within the footprint area). Generally, the operational portion of the bag is limited to the footprint area within the receiving region.
The hoist support 26 is shown the embodiment as comprising an I-beam engaged to the top of the main frame assembly 12. The I-beam is typically about an eight inch S-flange, approximately twenty-three pound beam that conforms to ASTM A36 carbon steel specifications. The hoist I-beam is typically engaged to the main frame assembly 12 with an about one inch thick plasma cut mounting support bracket. Of course, a number of different materials and configurations are likewise contemplated, and the hoist support is not limited to such a structure. Other hoist supports, such as tubing, and the like, is also contemplated.
The hoist assembly comprises hoist 30 and material transport subassembly 34. The hoist 30 is typically a heavy-duty hoist capable of lifting loads from about 1 ton to about 3 tons, although other capacities are likewise contemplated. Typically, the hoist is controlled with a conventional controller 32. The hoist 30 is operably coupled with a heavy-duty chain, cable, or other lifting member, which may include a steel hook at an end thereof. The steel hook is typically mounted to the chain such that it is allowed to rotate without binding the chain, usually utilizing a bearing in a ball and socket type arrangement. Of course, a number of different configurations are contemplated for use in association with the hoist.
Optionally, a forklift may be used in conjunction with a bag-hanging frame, which engages the bag 100. The bag suspends from the bag hanging fame and is moved into position with the forklift. The bag-hanging frame engages the main frame assembly. The bag-hanging frame typically engages the top of the main frame assembly and sets upon the four corners of the assembly. There are typically stacking pads on the top four corners of the main frame assembly that position the bag and the bag hanging assembly in the proper discharging position.
In other embodiments, a hoist system may be separate from the bulk bag discharge assembly. For example, crane of sorts which is free standing, or coupled to the building structure can be utilized in place of a hoist assembly. In other embodiments, a simple pulley system suspended from a beam of the surrounding structure can be utilized. Indeed, there is no limit as to how a user can place or suspend a bulk bag within the bulk bag receiving region.
With reference to
Additionally, each material container support members 38 typically include an inwardly extending L-shaped bag loop retention member 39 engaged at or near the non-hub engaging end of the material container support members 38. These L-shaped inwardly extending bag retention members, while not necessary, assist in preventing the loops of the bag/container from falling off the ends of the material container support members when the bag is placed on the ground for removal from the material container transport assembly. Without the L-shaped inwardly extending bag loop retention members, the bag loops could unintentionally disengage from the material container support members of the transport assembly when the bag container is no longer held in position by gravity. The inwardly extending L-shaped bag loop retention members may be of any suitable height, but typically extend slightly higher than the outwardly extending bag loop retention members. Moreover, the inwardly extending L-shaped bag loop retention members are typically substantially flat bent members, while the outwardly extending bag loop retention members may be any suitable shape, but are typically cylindrical in shape.
It will be understood that in other embodiments, a different material transport subassembly 34 may be employed. For example, a single chain that is extended through each loop of the bag may be employed, or a pair of chains, each of which extends through two loops and which is joined together is likewise contemplated. The disclosure is not limited to any particular material transport subassembly, and, any one of a number of different subassemblies can be utilized, as long as they can adequately support a bag that is filled.
The discharge assembly 16 is shown in
The massaging frame assembly 18 is shown in
The massager frame typically comprises a steel tubing which is pneumatically driven by the pneumatic mechanism 48a. The rounded configuration of steel tubing allows the assembly to be easily washed down when required. The pneumatic mechanism 48a that moves the massagers each independently provides a force of up to 1000 pounds on each side of the bag. Additionally, the pneumatic mechanism may be programmed or controlled so as to adjust both force and frequency. The force is adjusted by setting the pressure regulator to the desired setting and the frequency is adjusted by setting an adjustable timer. Each massager frame can be set to stroke into the bag in alternating fashion. The massager on the right will stroke in, then, as it retracts, the massager on the left will stroke in and vise versa. Alternatively, the massagers can be set to stroke in and out simultaneously. As will be explained, the massagers are configured to urge an already conditioned product (or a product that does not require conditioning) toward the discharge. It will be understood that certain products may form a breach or otherwise bind near the discharge, and the massagers assist with the loosening of these products for eventual discharge through the discharge opening.
The bag conditioning assembly 20 is shown in
The powered cylinder 70a include first end 72a which is pivotably coupled to the main frame assembly spaced apart from pivot 65a. The second end 74a of the powered cylinder 70a is pivotably coupled to the conditioner frame. In certain embodiments a single powered cylinder can be utilized, whereas in other embodiments, multiple powered cylinders can be employed. The powered cylinder is preferably a hydraulic cylinder or an air cylinder can apply a force of between 10,000-70,000 pounds. This force is significantly larger than the force that can be exerted by the massage frames 40a, 40b. Of course, a number of different cylinders or power devices are contemplated that can provide sufficient force to condition a bulk bag.
It will be understood that the conditioner frames and the powered cylinders are, in the embodiment shown, pivotably coupled to the frame assembly through a fixed pivot axis. It will be understood that the pivot axis can be translated up and down along the frame assembly so that the conditioner arms can be moved up or down (instead of moving the bulk bag, or in addition to moving the bulk bag). Such a configuration is shown schematically at
The particular configuration of the conditioner frame 62a can be similar to that which is disclosed in U.S. Pat. No. 8,181,568 issued to Hofman, et al, the entire disclosure of which is incorporated by reference in its entirety. In that application particular frame structures and reinforcements is disclosed, along with particular configurations of powered cylinders relative to the conditioner frame. Of course, in other embodiments, different configurations of the conditioner frame and powered cylinders is contemplated.
Problematically, and as is addressed in the '568 patent, it is advantageous to have the powered cylinders pivotably coupled to the main frame assembly 12 and also to the conditioner frame, which itself is pivotably coupled to the main frame assembly 12. In particular, such a configuration allows for the powered cylinders to have virtually no forces that are not along the axis of the piston and cylinder mechanism. It is the bending moments that eventually cause wear and failure to powered cylinders. By minimizing such bending moments through pivotal coupling, performance of the powered cylinders is enhanced.
In the present embodiment, however, there is an additional concern with the application of force to the bag. In particular, the bag in the present disclosure is, in certain embodiments, suspended from the hoist assembly 14. As such, when conditioned, the suspended bag experiences forces that must be handled by the straps that are coupling the bag to the material transport subassembly. Advantageously, the position of the pivot and the impact face is such that the impact face is being directed in an upward direction when impacting and treating the bag, through a majority of the receiving region of the bulk bag. As such, there is virtually no additional pulling or downward force exerted on the bag and the straps of the bag. Thus, damage to the bag is minimized. It is possible that, due to the position of the bag and inadvertent movement of the bag, a portion of the contact and travel of the conditioner frame can impose downward forces upon the bag, however, these are typically minimized, and, predominantly, upward forces are imparted by the conditioning frames.
One configuration which results in an application of an upward force occurs in the embodiment shown, wherein the pivot is positioned near or at the upper end 23 of the main frame assembly (i.e., above the area to be conditioned) and sufficiently laterally away from the space occupied by the bag (or the space immediately above the bag) so that the equilibrium position (wherein the force exerted by the pivots is in neither an upward or a downward direction) is spaced apart from the bag. In turn, by the time that the impact face contacts the bag, the force has an upward and an inward component.
In another configuration, shown schematically in
The configuration of
In operation, and with reference to
Generally, the bag comprises an outer woven bag and includes an inner liner which shape matingly engages the outer woven bag, the combination of which is commonly referred to as a bulk bag. Such bags may be filled with any number of dry goods, such as granular material, pastes, and the like. The bags may be cubic in configuration and may exceed 9-12 cubic feet with a capacity of in excess of 2000 pounds. The disclosure is not limited to any particular bag configuration, nor is the disclosure limited to any particular material that is contained within the bag. One such bulk bag is shown in U.S. Pat. No. 4,781,472 issued to LaFleur, the disclosure of which is hereby incorporated by reference.
Once the bag is coupled to the material transport subassembly 34, the user operates the hoist and positions the bag within the bag receiving region of the main frame assembly. Once positioned, the bag can be lowered or raised as needed so that the bottom surface 106 of the bag abuts the discharge support base 24, or is spaced apart therefrom.
In the embodiment that is specifically contemplated, for exemplary purposes, the product that is contained within the bag comprises a salt which has been transported in a wet or humid environment and has hardened such that even when the discharge opening 108 is opened, the salt is not easily expelled from within the bag. In such an exemplary situation, it is necessary to apply the bag conditioning assembly so that the product can be conditioned so that it can be readily discharged. The same is true of other materials which, through the presence of moisture and the like harden and are no longer easily separable into smaller granular and flowable components.
To effectuate conditioning, the first and second conditioners are activated. The activation of the conditioners is such that the powered cylinder(s) actuate and initiate rotation of the conditioner frames about pivot 65. Inasmuch as each of the powered cylinders are pivotably mounted, the force is applied along the longitudinal axis of the cylinders, minimizing any undesirable bending moments which can damage the cylinders. Continued rotation of the conditioner frames eventually directs the impact faces into contact with the bag powered by the force of the powered cylinders.
Due to the position of the pivot and the configuration of the conditioner, the impact face 68 of the conditioner frame contacts the bag in an inward and upward direction, (or shortly after contact with the bag) thereby conditioning (i.e., breaking up) the product, while being mindful of the forces exerted onto the hanging loops 110. In fact, in many instances, the conditioner arms actually reduce the force that is exerted on the hanging loops 110, at the time of contact, or very shortly thereafter.
The conditioners 62a, 62b may operate independently or in unison to act against the bag. In certain embodiments, it will be understood that one of the conditioners may be replaced with a stationary structure, such that only one conditioner is present, and is opposed by a stationary structure. It will also be understood that the bag may be manipulated by the hoist to raise or to lower as needed to effectuate treatment of different portions of the bag. For example, the hoist assembly and the bag conditioning assembly may be preprogrammed to have a specific treatment regimen which involves repeated movement of the conditioners as well as movement of the bag by way of the hoist assembly. In another embodiment, wherein configured, the conditioner frames can be translated relative to the frame so that the axis of pivoting is translated up or down relative to the conditioner frames and, in turn, the bulk bag.
Once the bag is conditioned as needed, the bag can be prepared for discharge. Where the bag is to be discharged on the same equipment, the bag is preferably positioned in close proximity to the discharge support base, and the discharge opening 108 is coupled to the discharge assembly. Finally, the discharge opening 108 is opened and the product is discharged through discharge mechanism 52. Advantageously, to urge the conditioned product toward and into the discharge opening 108, the massaging frame assembly 18 is activated wherein the massager frames 40a, 40b are directed to pivot about their respective pivots so that they contact and incline the bottom surface 106 of the bag toward and on opposing sides of the discharge opening. This further creates a funnel type of configuration that directs product toward and into the discharge opening.
When emptied, the bag can be removed from the discharge and hoist assembly and a subsequent bag can be introduced. It will be understood that not every bag that is positioned within the receiving region of the main frame assembly will require the use of the conditioning assembly 20. It will also be understood that in certain applications, the use of the massaging frame assembly can be omitted. It will further be understood that the bag conditioning assembly can be utilized without requiring discharge of the contents.
The foregoing description merely explains and illustrates the invention and the invention is not limited thereto except insofar as the appended claims are so limited, as those skilled in the art who have the disclosure before them will be able to make modifications without departing from the scope of the invention.
This application is a continuation in part of U.S. patent application Ser. No. 13/476,994 filed May 21, 2012, issued as U.S. Pat. No. 8,567,312, which is a continuation of U.S. patent application Ser. No. 12/393,783 filed Feb. 26, 2009, entitled Bulk Bag Conditioning System, issued as U.S. Pat. No. 8,181,568, which claims priority from U.S. Prov. Pat. App. Ser. No. 61/032,811 filed Feb. 29, 2008 entitled Bulk Bag Conditioning System, the entire disclosure of each of the foregoing is incorporated by reference herein in their entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
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| 1777224 | Reuther | Sep 1930 | A |
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| Number | Date | Country | |
|---|---|---|---|
| 20120305580 A1 | Dec 2012 | US |
| Number | Date | Country | |
|---|---|---|---|
| 61032811 | Feb 2008 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12393783 | Feb 2009 | US |
| Child | 13476994 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13476994 | May 2012 | US |
| Child | 13586377 | US |
