The present disclosure relates to a screen filter fabrication machine for fabricating wire based screen filters for separating solid matter from fluid streams. More particularly, the present disclosure is directed to a screen filter fabrication machine having a control system configured to monitor one or more parameters and implement one or more process control adjustments to affect a more uniform slot width between wires.
Screens fabricated from welded wires have been utilized for a variety of purposes since early in the 20th century. One of the most popular uses has been as a liquid separation instrument or filter to remove solids from liquids or as a gas separation instrument for removing solids or suspended liquids from gases. Representative liquids can include fresh or salt water as well as various aqueous and non-aqueous liquid process streams found in a variety of industries. More recently, wire-based screens have even been utilized as architectural components so as to provide unique aesthetic appearances to the exterior of buildings and other public structures. Regardless of the particular use, the fabrication techniques are similar for screens in each of these applications.
In the context of solid/liquid separation, one frequent application for wire-based screen filters is as part of a water intake system. These water intake systems typically use an inlet pipe adapted to transport water from a position submerged in a body of water to the end-user adjacent to the body of water. An inlet pipe is submerged in the body of water and the end of the inlet pipe is typically coupled to an intake filter assembly configured to inhibit waterborne debris and aquatic life, of a certain size, from entering the inlet pipe. Water intake systems are typically used to provide water to end-users such as manufacturing plants, cities, irrigation systems, and power generation facilities located adjacent to a body of water such as a river, lake, or salt water bodies. The end user may employ this type of system as an alternative to drilling a well or buying water from a municipality. Additionally, use of these systems may be determined by the location of the end-user, for example remote locations where water from a municipal source and/or electrical power to operate pumps is not readily available. These water collection systems have the ability to adapt to various conditions and deliver water efficiently and economically.
In many water intake systems, the inlet pipe will include an intake filter assembly that incorporates a wire-based screen to prevent particulate matter from entering the water intake system. Due to their robust strength, the wire-based screen allows the intake filter assembly to be repeatably cleaned, backwashed and or flushed so as to extend the life of the intake filter assembly. As such, costs associated with plugging, replacement and disposal common to other types of intake filters, such as conventional bag, cartridge, ceramic, hollow fiber, and membrane filters, can be avoided. These same advantages extend to the use of wire-based screens in industrial processes, which can lead to increase process uptime and lower production costs.
While the current state of the art in wire-based screens provides a number for many processing advantages, it would be advantageous to further improve upon the manufacturing techniques so as to improve screen consistency and reduce production waste. In particular, it would be advantageous to develop techniques that provide for the manufacturing of wire-based screens having reduced variability during construction such that variability in gap width between adjacent wires is reduced.
Embodiments of the present disclosure provide a screen filter fabrication machine configured to fabricate a screen filter with a higher level of consistency in gap width, such that the filter can be used to target and/or remove particulate matter having above a desired particulate size that is greater than the gap opening. One representative embodiment of the present disclosure provides a screen filter fabrication machine including a frame, a tooling head configured to rotate relative to the frame and retain a plurality of support rods, a wire feed wheel operably coupled to the frame and configured to dispense wire, and a control system configured to monitor one or more parameters concerning the slot width, and implement one or more process control adjustments configured to enable the winding of the wire around the plurality of support rods in such a manner that at least 99.7% of a measured slot width during screen filter fabrication falls within three standard deviations of a mean slot width measured during screen filter fabrication.
The above summary is not intended to describe each illustrated embodiment or every implementation of the subject matter hereof. The figures and the detailed description that follow more particularly exemplify various embodiments.
Subject matter hereof may be more completely understood in consideration of the following detailed description of various embodiments in connection with the accompanying figures, in which:
While various embodiments are amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the claimed inventions to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the subject matter as defined by the claims.
Referring to
In one embodiment, the screen filter 100 can include a plurality of support rods 102. The support rods 102 can be evenly spaced and arranged in parallel relation to a longitudinal axis 104 of the screen filter 100. As best depicted in
Referring to
Opposite to the first vertex 122, is an exposed wire surface 124 having a wire width 114 defined between a second vertex 126 and a third vertex 128. The second vertex 126 and the third vertex 128 can each define a corner radius 130. A pair of relief surfaces 132a, 132b can extend between the first vertex 122 and the second and third vertices 126, 128 respectively. A wire height 136 can be defined between the first vertex 122 and the exposed wire surface 124. When the wire 110 is operably coupled to the support rod 102, and overall screen height 138 is generally defined between the interior surface 106 and the exposed wire surface 124. The screen height 138 is generally equivalent to the sum of the wire height 136 and the support rod height 140, minus the penetration depth 123. The spiral wrapping and welding of the wire 110 about the support rods 102 results in a repeating pattern of adjacent wires 110a, 110b.
Referring to
In some embodiments, it may be desirable to “reverse” the attachment of the wire 110 to the support rod 102, such that the exposed wire surface 124 is affixed to the support rod 102 such that the slot width 118 is defined proximate to the support rod 102 and is inwardly facing toward a center of the cylindrical body 101. Additionally, depending upon the overall size of the screen filter 100, for example, the desired diameter and/or length of the cylindrical body 101, the wire 110 can comprise two more lengths or spools of wire 110 that have been joined together, such that the spiral winding of the wire 110 about the support rods 102 is continuous. In some embodiments, the cylindrical body 101 can be cut, sheared or otherwise reformed into a flat screen or into other alternative screen shapes. In addition, the screen filter 100 can include additional attachment or framing elements such as, for example, rings, fittings, bards, and other like devices to aid in mounting the screen filter 100 and the desired application.
In some embodiments, the pitch 116 and/or penetration depth 123 of the wire 110 can be varied during fabrication to achieve a more uniform slot width 118. For example, in one embodiment, one or more quality control measurements can be taken during the fabrication process, and used to provide feedback in the control and positioning of adjacent wires 110a, 110b, and/or the attachment of the wire 110 to the support rod 102, so as to reduce the maximum deviation along the slot width 118 within a cylindrical body 101. Accordingly, the screen filter 100 of the present disclosure is generally fabricated such that the slot width 118 is uniform and consistently defined between each of the adjacent wires 110a, 110b along a length of the cylindrical body 101. In some embodiments, consistency in the measurable slot width 118 can be such that the screen filter 100 can reliably be used to remove particulate matter having a particulate size of 10 μm or less.
In some embodiments, it may be desirable to vary a “tilt” of the wire 110 relative to the support rods 102. In these situations, the exposed wire surface 124 between adjacent wraps of the wire 110 will not reside in the same plane intentionally, nor will they be parallel to plane of the support rods 102. In some instances, the exposed wire surface 124 between adjacent wraps of wire 110 will reside in a parallel orientation. It will be understood that depending upon the specific design of screen filter 100, the “tilt” of the wire 110 may be intentionally varied throughout the construction of a single screen filter 100.
Referring to
The plurality of supporting rods 102 can be operably coupled to the tooling head 204 via a pull ring 214, such that the pull ring 214 is configured to pull the supporting rods 102 through the screen filter fabrication machine 200, as the wire 110 is wound around the supporting rods 102. Prior to being wound with wire 110, the plurality of supporting rods 102 can be supported by a rod holder 216. A wire feed wheel 218 can be positioned in proximity to the tooling head 204, and can be configured to dispense wire 110 as it is wound around the supporting rods 102. A wire feed guide 220 can further aid in positioning the wire 110 relative to the supporting rods 102 during fabrication. In some embodiments, the tension of wire 110 can be controlled via the wire feed wheel 218, as it is wound around the supporting rods 102, so as to affect the proper penetration depth 123 of the wire 110 relative to the supporting rods 102.
In some embodiments, an electrical current generated by an electrical current source 222 can be applied to the wire 110, while the plurality of supporting rods 102 can be in electrical communication with an electrical ground. Accordingly, in some embodiments, the electrical current applied to wire 110 can cause the wire 110 to bond to one of the plurality of supporting rods 102 when the wire 110 and the supporting rod 102 make contact, thereby causing the wire 110 to fuse or to be welded to the supporting rod 102. In some embodiments, only the supporting rod 102 closest to the wire feed guide 222 can be grounded, so as to establish a clear path of least resistance. In some embodiments, the electrical current can be alternated on and off, such that electrical current is only applied when needed. In some embodiments, the magnitude of electrical current can be controlled by the electrical current source 222, so as to affect the proper penetration depth 123 of the wire 110 relative to the supporting rods 102.
In some embodiments, the tooling head 204 can be configured to move laterally along the axis of rotation relative to the frame 202, so as to provide the proper pitch 116 between adjacent wires 110a, 110b as the wire 110 is wound around the supporting rods 102. In one embodiment, a rotary screw 212 is employed to affect the lateral movement; however, the use of other mechanisms known in the art to affect lateral movement is also contemplated. In one embodiment, the lateral movement of the tooling head 204 relative to the frame 202 can be controlled, so as to achieve the desired slot width 118 between adjacent wires 110a, 110b. Additionally, in one embodiment, the rotation of the tooling head 204 relative to the frame 202 can be controlled, so as to achieve the desired penetration depth 123 of the wire 110 relative to the supporting rods 102 and/or the desired slot width 118 between adjacent wires 110a, 110b during the fabrication process.
Referring to
Referring again to
Referring to
At 306, during fabrication, one or more parameters concerning the quality of the screen filter 100, or components thereof, are sensed or monitored. In one embodiment, the parameters concerning the quality of the screen filter 100 include at least one of the (1) wire width 114, (2) pitch 116, (3) slot width 118, (4) rate of advance (e.g., lateral shift of the tooling head 202 and/or wire feed wheel 218 relative to the frame 202), (5) magnitude of the weld energy (e.g., electrical current supplied via the electrical current source 222), (6) weld pressure (e.g., tension in the wire 110 affected by the wire feed wheel 218 and/or the rotation of the tooling head 204 relative to the frame 202), (7) linear position of the tooling head 204 and/or wire feed wheel 218 relative to the frame 202, (8) rotary position of the tooling head 204 relative to the frame 202, (9) wire position (e.g., the position of the wire feed wheel 218 relative to the tooling head 204), and (10) other parameters as needed. At 308, one or more of the measured parameters can be displayed. In one embodiment, the one or more parameters can be monitored continuously. In another embodiment, the frequency that the one or more parameters are monitored can be based on statistical data, or previous measurements from the monitoring of the one or more parameters. At 310, the one or more sensed to parameters is recorded.
At 312, it is queried as to whether the fabrication process is complete. If the fabrication process has not been completed, at 314, it is queried as to whether the slot width 118 is of the appropriate size and/or whether the wire surface 124 of adjacent wires 110a, 110b are in alignment. If it is determined that the slot width 118 is not the appropriate size and/or the wire surface 124 of adjacent wires 110a, 110b are not in alignment, at 316, one or more process control adjustments is made to the fabrication machine 200. In one embodiment, the process control adjustments include at least one of the: (1) pitch 216, (2) magnitude of the weld energy (e.g., electrical current supplied via the electrical current source 222), (3) weld pressure (e.g., tension in the wire 110 affected by the wire feed wheel 218 and/or the rotation of the tooling head 204 relative to the frame 202), (4) linear position of the tooling head 204 and/or wire feed wheel 218 relative to the frame 202, (5) rate of advance (e.g., the rate of lateral shifting of the tooling head 204 and/or wire feed wheel 218 relative to the frame 202), (6) rotary position of the tooling head 204 relative to the frame 202, (7) rate of rotation (e.g., the rate of the rotation of the tooling head 204 relative to the frame 202, (9) wire position (e.g., the position of the wire feed wheel 218 relative to the tooling head 202), and (10) other process control adjustments as needed. Following a process control adjustments, at 306, one or more parameters concerning the quality of the screen filter 100, or components thereof, is again sensed or monitored, and the process continues.
Alternatively, if at 314, it is determined that the slot width 118 is the appropriate size and/or the wire surface 124 of adjacent wires 110a, 110b are in alignment, at 318, no process control adjustments are made, and the process advances to 306 for the sensing of one or more parameters concerning the quality of the screen filter 100.
If at 312, it is determined that the fabrication process is completed, at 320, fabrication of the screen filter 100 is shut down. At 322, sensed parameters and/or other data collected during operation 306 can be optionally stored in a memory. At 324, optionally, the sensed parameters and/or other data collected during operation 306 can be utilized to generate a report.
It should be understood that the individual steps used in the methods of the present teachings may be performed in any order and/or simultaneously, as long as the teaching remains operable. Furthermore, it should be understood that the apparatus and methods of the present teachings can include any number, or all, of the described embodiments, as long as the teaching remains operable.
Referring to
Accordingly, in one example embodiment, the wire width 114 of wire 110 could be measured by the fabrication machine 200 as it is dispensed from the wire feed wheel 218. If the wire width 114 is determined to be smaller than the mean wire width 114, one or more process control adjustments can be made. For example, the linear position of the tooling head 204 and/or wire feed wheel 218 relative to the frame 202 can be adjusted to compensate for the smaller wire width 114 to achieve the appropriate slot width 118, and the magnitude of the weld energy (e.g., electrical current supplied via the electrical current source 222) can be adjusted to achieve the appropriate penetration depth 123. Other process control adjustments can be made as desired/needed to affect the desired characteristics of the screen filter 100 during fabrication.
In one embodiment, if the sensed wire width 114 is within a first predefined range, a first set of process control adjustments can be made. If the sensed wire width 114 is outside of the first predefined range, but within a second predefined range, a second set of process control adjustments, which can include the first set of process control adjustments plus additional process control adjustments, can be made. If the sensed wire width 114 is outside of the second predefined range, an operator of the fabrication machine 200 can be alerted via the display measurements, and the process 300 can be halted until appropriate corrections can be made.
Referring to
In one embodiment, data collected during operation 322 can be analyzed by the fabrication machine 200, and through a process of continually modifying different process control adjustments, for example by a Design of Experiments (DOE) process, the fabrication machine 200 can optimize characteristics of the fabricated screen filter 100.
Various embodiments of systems, devices, and methods have been described herein. These embodiments are given only by way of example and are not intended to limit the scope of the claimed inventions. It should be appreciated, moreover, that the various features of the embodiments that have been described may be combined in various ways to produce numerous additional embodiments. Moreover, while various materials, dimensions, shapes, configurations and locations, etc. have been described for use with disclosed embodiments, others besides those disclosed may be utilized without exceeding the scope of the claimed inventions.
Persons of ordinary skill in the relevant arts will recognize that the subject matter hereof may comprise fewer features than illustrated in any individual embodiment described above. The embodiments described herein are not meant to be an exhaustive presentation of the ways in which the various features of the subject matter hereof may be combined. Accordingly, the embodiments are not mutually exclusive combinations of features; rather, the various embodiments can comprise a combination of different individual features selected from different individual embodiments, as understood by persons of ordinary skill in the art. Moreover, elements described with respect to one embodiment can be implemented in other embodiments even when not described in such embodiments unless otherwise noted.
Although a dependent claim may refer in the claims to a specific combination with one or more other claims, other embodiments can also include a combination of the dependent claim with the subject matter of each other dependent claim or a combination of one or more features with other dependent or independent claims. Such combinations are proposed herein unless it is stated that a specific combination is not intended.
Any incorporation by reference of documents above is limited such that no subject matter is incorporated that is contrary to the explicit disclosure herein. Any incorporation by reference of documents above is further limited such that no claims included in the documents are incorporated by reference herein. Any incorporation by reference of documents above is yet further limited such that any definitions provided in the documents are not incorporated by reference herein unless expressly included herein.
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/US2018/053297 | 9/28/2018 | WO | 00 |
Number | Date | Country | |
---|---|---|---|
62564762 | Sep 2017 | US |