US20170014737A1 - Strainer and Strainer Control System - Google Patents
Strainer and Strainer Control System Download PDFInfo
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- US20170014737A1 US20170014737A1 US15/207,119 US201615207119A US2017014737A1 US 20170014737 A1 US20170014737 A1 US 20170014737A1 US 201615207119 A US201615207119 A US 201615207119A US 2017014737 A1 US2017014737 A1 US 2017014737A1
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- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 26
- 238000011144 upstream manufacturing Methods 0.000 claims description 17
- 230000004044 response Effects 0.000 claims description 7
- 230000000717 retained effect Effects 0.000 claims description 6
- 239000013618 particulate matter Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000012216 screening Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 18
- 230000007246 mechanism Effects 0.000 description 7
- 230000000737 periodic effect Effects 0.000 description 6
- 238000011143 downstream manufacturing Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
- B01D37/046—Controlling the filtration by pressure measuring
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/16—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
- The present invention relates in general to strainers that may be used in such applications as filtration and fluid flow safety. More particularly, the present invention relates to an improved strainer construction as well as an associated control system. Even more particularly, the present invention relates to a method of controlling a strainer element.
- In the field of filtration and fluid flow safety there is relatively common use of a device that is identified as a strainer. The strainer or screening device is used to retain foreign objects. The strainer is usually a fixed position device. It is typical to provide access to the strainer for cleaning the strainer. However, this access is many times not very convenient. Also, the typical strainer device is not suited for the receipt and processing of objects that are the result of an upstream breakage or destruction.
- Accordingly, it is an object of the present invention to provide an improved screening apparatus in the form of a strainer element, and in which the strainer element is rotatable through 180 degrees in accordance with one mode of operation. This mode of operation enables any foreign objects collected at the strainer to be periodically released.
- Another object of the present invention is to provide a control system for controlling a strainer, particularly as to its rotation parameter. The system of the present invention provides an improvement in the overall process so as to maximize the uptime of the process, while simultaneously protecting against any upset or unacceptable event that may occur downstream of the strainer.
- Still another object of the present invention is to provide a control system for controlling a strainer element that enables the strainer element, in one mode of operation, to be locked in position so that any foreign objects, debris or detritus is retained at the strainer element for subsequent collection. In accordance with another mode of operation of the control system of the present invention, foreign objects, particularly debris or detritus, may be diverted to a collection receptacle.
- A further object of the present invention is to provide a method of controlling a strainer element that is used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, and in which control is of, not only the rotation of the strainer element, but also control of valves so as to divert debris or detritus to a collection receptacle.
- To accomplish the foregoing and other objects, features and advantages of the present invention there is provided a screening apparatus comprising a strainer element used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, a support structure for the strainer element to enable rotation of the strainer element between opposed 180 degree positions, and a control member coupled with the strainer element for controlling the rotation of the strainer element. The strainer element, in both opposed positions thereof impedes any particulate while permitting the passage of a liquid. The control member is constructed and arranged so that, in a first state thereof, the rotation of the strainer element is periodically controlled to rotate the strainer element between said opposed 180 degree positions, and in a second state thereof, inhibits rotation of the strainer element.
- In accordance with other aspects of the present invention the support structure includes a frame, and the strainer element includes a circular strainer member mounted in the frame and a shaft for supporting the strainer member relative to the frame; the control member includes an electro-mechanical mechanism that, in the first state periodically controls the rotation of the shaft between the opposed positions, and in the second state inhibits rotation of the shaft; including a downstream processing device that has the ability to generate a fault signal, the fault signal for controlling the electro-mechanical mechanism, in its second state, to inhibit rotation of the circular strainer member; including, in combination therewith, a first valve disposed upstream of the strainer element and having open and closed positions, the first valve being in the open position in the first state, and being in the closed position in the second state; including, in combination therewith, a second valve disposed upstream of the strainer element and having closed and open positions, the second valve being in the closed position in the first state, and being in the open position in the second state; the control member includes a timer set to determine the periodic control; the control member includes a pressure sensor to determine the periodic control.
- In accordance with another aspect of the present invention there is provided a control system for controlling a strainer element that is used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, the strainer element rotatable between opposed 180 degree positions, and an electrical controller coupled with the strainer element and for controlling the rotation of the strainer element. The strainer element, in both opposed positions thereof impedes any particulate matter while permitting the passage of a liquid through the strainer element. The electrical controller is constructed and arranged so that, in a first state thereof, the rotation of the strainer element is periodically controlled to rotate the strainer element between the opposed 180 degree positions, and in a second state thereof, is controlled to inhibit rotation of the strainer element.
- In accordance with still other aspects of the present invention the rotation of the strainer element includes a support structure having a frame, and the strainer element includes a circular strainer member mounted in the frame and a shaft for supporting the strainer member relative to the frame, the shaft being rotatable in order to rotate the circular strainer member; further including an electro-mechanical mechanism that, in the first state periodically controls the rotation of the shaft and, in turn, the circular strainer member between the opposed positions, and in the second state inhibits rotation of the shaft and, in turn, the circular strainer member; including a downstream processing device that generates a fault signal in response to a fault condition that has occurred, said fault signal for controlling the electro-mechanical mechanism, its second state, to inhibit rotation of said circular strainer member; including a first valve disposed upstream of said strainer element and having open and closed positions, said first valve being in the open position in the first state, and being in the closed position in the second state; including a second valve disposed upstream of said strainer element and having closed and open positions, said second valve being in the closed position in the first state, and being in the open position in the second state; the electrical controller includes a timer set to determine the periodic control; including a downstream processing device that generates a fault signal in response to a fault condition that has occurred and wherein said electrical controller further includes a gate device that is coupled from the timer and also receives the fault signal; the control member includes a pressure sensor to determine the periodic control; including a downstream processing device that generates a fault signal in response to a fault condition that has occurred and wherein said electrical controller further includes a gate device that is coupled from the pressure sensor and also receives the fault signal.
- In accordance with still other aspects of the present invention there is provided a method of controlling a strainer element that is used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, comprising controlling the strainer element so as to rotate between opposed 180 degree positions, controlling the strainer element so that the strainer element, in both opposed positions thereof, impedes any particulate matter while permitting the passage of a liquid through the strainer element, controlling, in a first state, the rotation of the strainer element so that the strainer element is periodically rotated between said opposed 180 degree positions, and controlling in a second state thereof, so as to inhibit rotation of the strainer element. Other aspects include providing a first valve disposed upstream of said strainer element and having open and closed positions, controlling said first valve to be in the open position in the first state, and controlling said first valve to be in the closed position in the second state; providing a second valve disposed upstream of said strainer element and having closed and open positions, controlling said second valve to be in the closed position in the first state, and controlling said second valve to in the open position in the second state; and providing a downstream processing device that generates a fault signal in response to a fault condition that has occurred, said fault signal for controlling said first and second valves.
- It should be understood that the drawings are provided for the purpose of illustration only and are not intended to define the limits of the disclosure. In the drawings depicting the present invention, all dimensions are to scale. The foregoing and other objects and advantages of the embodiments described herein will become apparent with reference to the following detailed description when taken in conjunction with the accompanying drawings in which:
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FIG. 1 is a diagram of a first embodiment of a strainer control system in accordance with the present invention and employing a timer control; -
FIG. 2 is diagram of a second embodiment of a strainer control system in accordance with the present invention and employing a pressure sensor; -
FIG. 3 is a diagram showing somewhat further detail relating to the fault event; -
FIG. 4 is a diagram showing further details at the strainer element to illustrate the rotation of the strainer element; -
FIG. 5 is a perspective view of the strainer element for illustrating the 180 degree rotation of the strainer element; -
FIG. 6 is a partial system diagram of an alternate embodiment of that described inFIG. 1 ; -
FIG. 7 is a timing diagram associated with the system illustrated inFIG. 1 ; -
FIG. 8 is a timing diagram associated with the system ofFIG. 6 ; and -
FIG. 9 is an alternate diagram of a strainer control system in accordance with the present invention. - Reference is now made to the block diagrams illustrating different modes of operation of the strainer and associated control system for the strainer. One of the purposes of the control system, along with the unique construction of the strainer element, is to maximize the up-time of the system operation. Another feature that is described with regard to the block diagrams is a system for protecting against any fault event or process upset when debris or detritus become entrained in the fluid flow.
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FIG. 1 is a schematic block diagram of a first embodiment of the present invention in which the strainer element is controlled for rotation by means of a timer. The second embodiment of the present invention is shown in the block diagram ofFIG. 2 in which pressure sensing occurs at the strainer and the rotation of the strainer in turn is controlled by a pressure sensor that senses a pressure differential at the strainer.FIGS. 3-5 show further details associated with either the system ofFIG. 1 or the system ofFIG. 2 .FIG. 6 shows an alternate simplified control diagram. Finally,FIGS. 7 and 8 are timing diagrams associated with the different embodiments described herein. - With reference to the schematic block diagram of
FIG. 1 , there is illustrated aflow line 10 shown coupled to afault detector 12 by way of the line orpiping 11. Upstream of thefault detector 12 is thestrainer 14 of the present invention. The system illustrated inFIG. 1 also includes adownstream valve 16 coupled by way of thepiping 17 from thestrainer 14. Adivert pipe 19 is also shown coupling from thepiping 17 to asecond valve 18. Thesecond valve 18 can, in turn, connect by way of piping to thecollection receptacle 20. The diversion via thevalve 18 allows a diversion path of detritus, such as from a fault event. This fault event may be, for example, when a Uv tube, used in a filtration system, breaks and parts of the tube assembly flow to the strainer and are held at the strainer. - In the system in
FIG. 1 , under normal operating conditions, when there is no fault detected, thecontroller 24 provides the following operation.Controller 24 may be an electrical controller and is illustrated as including atimer 26 and agate 28. Under normal, no fault, operation, a timing signal from thetimer 26 is coupled by way of thegate 28 to thestrainer 14. This action enables thestrainer 14 to rotate through 180 degrees thus releasing any foreign objects that had been retained by the strainer. This basic operation is illustrated inFIG. 6 wherein the output of thegate 28 couples only to thestrainer element 14. Under a no-fault condition the signal fromgate 28 to thevalves valve 16 is normally open and thevalve 18 is normally closed. Thus, under that no fault condition, when thestrainer 14 is rotated any foreign objects are coupled by way of the piping 17 and thevalve 16 to a discharge point or location at 21. Actually, in the version inFIG. 6 that operation is possible without controlling either of thevalves - If a fault event occurs, and with further reference to
FIG. 3 , then an error signal is generated online 30.FIG. 3 illustrates one of many different fault conditions that may occur.FIG. 3 illustrates, for example, a UV tube assembly at 32 that has afault detector 34 associated therewith. If one of the UV tubes breaks then a signal is generated fromdetector 34 on theerror signal line 30 coupled to theelectrical controller 24 and in turn to thesensing gate 28. Under that condition, the output from thegate 28 controls thestrainer 14, and thevalve 16 as well as thevalve 18. The signal from thegate 28 causes thestrainer 14 to rotate releasing any of the detritus such as pieces from the UV tube. However, it is desired in accordance with that fault mode of operation that any of the foreign objects, instead of being discharged through thevalve 16 tolocation 21, are discharged through thevalve 18 to thecollection receptacle 20. Thus, in that mode of operation when the output is generated at thegate 28, this causes thevalve 16 to switch from a normally open to a closed position. This blocks the flow of liquid to the discharge at 21. At the same time, thevalve 18, which is a normally closed valve, opens and thus the foreign objects are conveyed from thestrainer 14, by way of thevalve 18, to thecollection receptacle 20. This collection receptacle is particularly suited for receiving fault derived items for inspection thereof. - With reference to the schematic block diagram of
FIG. 2 , many of the same reference numbers are used as illustrated inFIG. 1 to identify basically the same components. InFIG. 2 there is illustrated aflow line 10 shown coupled to afault detector 12 by way of the line orpiping 11. Upstream of thefault detector 12 is thestrainer 14 of the present invention. The system illustrated inFIG. 2 also includes adownstream valve 16 coupled by way of the piping 17 from thestrainer 14. A divertpipe 19 is also shown coupling from the piping 17 to asecond valve 18. Thesecond valve 18 can, in turn, connect by way of piping to thecollection receptacle 20. The diversion via thevalve 18 allows a diversion path of detritus, such as from a fault event. This fault event may be, for example, when a Uv tube, used in a filtration system, breaks and parts of the tube assembly flow to the strainer and are held at the strainer. - In the system in
FIG. 2 , under normal operating conditions, when there is no fault detected, thecontroller 24 provides the following operation.Controller 24 may be an electrical controller and is illustrated as including apressure sensor 27 and agate 28. Under normal, no fault, operation, a timing signal from thepressure sensor 27 is coupled by way of thegate 28 to thestrainer 14. This action enables thestrainer 14 to rotate through 180 degrees thus releasing any foreign objects that had been retained by the strainer. This basic operation is illustrated inFIG. 6 wherein the output of thegate 28 couples only to thestrainer element 14. Under a no-fault condition the signal fromgate 28 to thevalves valve 16 is normally open and thevalve 18 is normally closed. Thus, under that no fault condition, when thestrainer 14 is rotated any foreign objects are coupled by way of the piping 17 and thevalve 16 to a discharge point or location at 21. Actually, in the version inFIG. 6 that operation is possible without controlling either of thevalves - In
FIG. 2 , rather than using a timer the control at thegate 28 is from thepressure sensor 27. Thepressure sensor 27 is responsive to a sensed differential pressure at thestrainer 14. For that purpose a pair of pressure sensors may be disposed at opposite upstream and downstream sides of the strainer in order to detect a differential pressure essentially across thestrainer 14. This differential pressure is illustrated inFIG. 2 by thefeedback line 29 that couples from the pair of sensors at thestrainer 14 to thepressure sensor 27. Thepressure sensor 27 may have a threshold level that is set so that once a predetermined differential pressure is reached, as detected online 29, thepressure sensor 27 sends a signal to thegate 28 as previously described in connection with the operation of the embodiment shown inFIG. 1 . -
FIGS. 4 and 5 describe further details of the strainer element. Thestrainer element 14 may be considered as comprised of amain support frame 40, therotatable strainer 42 andsupport shaft 44. Thestrainer 42 is fixedly attached to theshaft 44 and rotates upon rotation of theshaft 44. Theshaft 44 is supported within theframe 40. Bearings (not shown) may be provided at opposite ends of theshaft 44 between theshaft 44 and theframe 40. These additional details are schematically described inFIG. 4 .FIG. 4 also illustrates thecontroller 24 and an electro-mechanical mechanism 46 that is disposed between thecontroller 34 and theshaft 44. The electro-mechanical mechanism converts an electrical signal from thecontroller 24 into a mechanical motion; or in other words causes a 180 degree rotation of theshaft 44. As indicated previously, this rotation may be based either upon a timer, a pressure sensor or may even be based on other input parameters, including but not limited to temperature or temperature differential. Rotation of theshaft 44 causes immediate rotation of thestrainer 42. - With reference to the schematic block diagram of
FIG. 6 , many of the same reference numbers are used as illustrated inFIGS. 1 and 2 to identify basically the same components. InFIG. 6 there is illustrated aflow line 10 shown coupled to afault detector 12 by way of the line orpiping 11. Upstream of thefault detector 12 is thestrainer 14 of the present invention. In the system inFIG. 6 , under normal operating conditions, when there is no fault detected, thecontroller 24 provides the following operation.Controller 24 may be an electrical controller and is illustrated as including atimer 26 and a gate 28 (or alternatively a pressure sensor as inFIG. 2 ). Under normal, no fault, operation, a timing signal from thetimer 26 is coupled by way of thegate 28 to thestrainer 14. This action enables thestrainer 14 to rotate through 180 degrees thus releasing any foreign objects that had been retained by the strainer. This basic operation is illustrated inFIG. 6 wherein the output of thegate 28 couples only to thestrainer element 14. - With reference to the schematic block diagram of
FIG. 9 there is illustrated aflow line 10 shown coupled to afault detector 12 by way of the line orpiping 11. The fault detector may be the same as illustrated inFIG. 3 including adetector 34 that essentially issues a “fault” signal upon a fault occurring such as a breakage of a component. Downstream of thefault detector 12 is thestrainer 14 of the present invention. The system illustrated inFIG. 9 also includes adownstream valve 16 coupled by way of the piping 17 from thestrainer 14. A divertpipe 19 is also shown coupling from the piping 17 to asecond valve 18. Thesecond valve 18 can, in turn, connect by way of piping to thecollection receptacle 20. The diversion via thevalve 18 allows a diversion path of detritus, such as from a fault event. This fault event may be, for example, when a Uv tube, used in a filtration system, breaks and parts of the tube assembly flow to the strainer and are held at the strainer for release to a specific collection receptacle. - In the system in
FIG. 9 , under normal operating conditions, when there is no fault detected, thecontroller 24 provides the following operation.Controller 24 may be an electrical controller and is illustrated as including atimer 26 and a series of electronic control gates identified inFIG. 9 as aninverter 50, an ANDgate 52, and anOR gate 54. Under normal, “no fault”, operation, a timing signal from thetimer 26 is coupled by way of thegate 52 andgate 54 to thestrainer 14. This action enables thestrainer 14 to rotate through 180 degrees thus releasing any foreign objects that had been retained by the strainer. This basic operation is also illustrated inFIG. 6 wherein the output of thegate 28 couples only to thestrainer element 14. Under a “no-fault” condition thevalves valve 16 is normally open and thevalve 18 is normally closed. Thus, under that “no fault” condition, when thestrainer 14 is rotated any foreign objects are coupled by way of the piping 17 and thevalve 16 to a discharge point or location at 21. - In a “no fault” state, one can consider that the signal on
line 30 is at a logical “0” level. This signal is inverted at theinverter gate 50 so that the signal on the line is at a logical “1” state. This signal, along with the output of thetimer 26 online 55 is coupled to the ANDgate 52. The signal online 51 essentially enables thegate 52 so that any signal pulse from thetimer 28 is coupled directly through the ANDgate 52 to theOR gate 54, and, in turn, via thedelay circuit 56 andlines strainer 14 for control of the rotation of thestrainer 14. The periodic output from thetimer 26 may be a pulse for operating the electro-mechanical mechanism 46 (seeFIG. 4 ) to cause periodic rotation of thestrainer 14. Alternatively, a pressure sensing arrangement may be used in place of the timer, as inFIG. 2 . The output of the timer is controlled through theOR gate 54 and thedelay 56 to operate the rotation of thestrainer 14. Under that same “no fault” condition the logical “0” online 53 directly controls thevalves valve 16 is normally open and thevalve 18 is normally closed. Thus, under this “no fault” condition, when thestrainer 14 is rotated any foreign objects are coupled by way of the piping 17 and thevalve 16 to a discharge point or location at 21. - If a “fault” event occurs, and with further reference to
FIG. 3 , then an error signal is generated online 30.FIG. 3 illustrates one of many different fault conditions that may occur.FIG. 3 illustrates, for example, a UV tube assembly at 32 that has afault detector 34 associated therewith. If one of the UV tubes breaks then a signal is generated fromdetector 34 on theerror signal line 30 coupled to theelectrical controller 24 and in turn to thesensing gates inverter gate 50 goes to a logical “0” essentially inhibiting the ANDgate 52 so that the rotation of thestrainer 14 is no longer controlled from the timer. However, the logical “1” signal oninput line 30 is coupled vialine 53 into one of the two inputs of theOR gate 54. This logical “1” signal online 53 is coupled via theOR gate 54 and thedelay circuit 56 to control rotation of thestrainer 14. The delay circuit may be optional. It can be used to delay the rotation signal to thestrainer 14 so that one is assured that thevalves receptacle 20, and not discharged tolocation 21. - It is desired in accordance with this “fault” mode of operation that any of the foreign objects (event items), instead of being discharged through the
valve 16 tolocation 21, are discharged through thevalve 18 to thecollection receptacle 20. Thus, in this mode of operation when the output is generated at theline 53, this causes thevalve 16 to switch from a normally open to a closed position. This blocks the flow of liquid to the discharge atlocation 21. At the same time, thevalve 18, which is a normally closed valve, opens and thus the foreign objects (event items) are conveyed from thestrainer 14, by way of thevalve 18, to thecollection receptacle 20. Thiscollection receptacle 20 is particularly suited for receiving fault derived items for inspection thereof. - Having now described a limited number of embodiments of the present invention, it should now be apparent to those skilled in the art that numerous other embodiments and modifications thereof are contemplated as falling within the scope of the present invention, as defined by the appended claims. For example, the strainer that has been used is considered as rotating through 180 degrees between positions. However, there may be other strainer configurations in which opposite positions could be attained by means of rotation amounts less than or greater than 180 degrees.
Claims (21)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US15/207,119 US20170014737A1 (en) | 2015-07-14 | 2016-07-11 | Strainer and Strainer Control System |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US14/799,202 US9387421B1 (en) | 2015-07-14 | 2015-07-14 | Strainer and strainer control system |
US15/207,119 US20170014737A1 (en) | 2015-07-14 | 2016-07-11 | Strainer and Strainer Control System |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/799,202 Division US9387421B1 (en) | 2015-07-14 | 2015-07-14 | Strainer and strainer control system |
Publications (1)
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US20170014737A1 true US20170014737A1 (en) | 2017-01-19 |
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US14/799,202 Active US9387421B1 (en) | 2015-07-14 | 2015-07-14 | Strainer and strainer control system |
US15/207,119 Abandoned US20170014737A1 (en) | 2015-07-14 | 2016-07-11 | Strainer and Strainer Control System |
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US14/799,202 Active US9387421B1 (en) | 2015-07-14 | 2015-07-14 | Strainer and strainer control system |
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Families Citing this family (4)
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US10406458B1 (en) | 2018-03-23 | 2019-09-10 | Blue Skies Global LLC | Regenerative media filtration |
US11065566B2 (en) | 2018-03-23 | 2021-07-20 | Blue Skies Global LLC | Regenerative media filtration |
US11167226B2 (en) | 2018-03-23 | 2021-11-09 | Blue Skies Global LLC | Regenerative media filtration |
CN114225510B (en) * | 2021-12-23 | 2023-02-24 | 南通力联自动化科技有限公司 | Double-channel intelligent filtering system and method |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2891671A (en) | 1955-12-19 | 1959-06-23 | Nilsson Ivar Linus | Filter drum for recovering fibers from liquid |
US3369669A (en) | 1966-02-09 | 1968-02-20 | Clifford W. Loftin | Domestic back flush water system filter |
ES479119A1 (en) * | 1978-04-07 | 1979-11-16 | Kloeckner Humboldt Deutz Ag | Method for vacuum filtration |
GB2102691B (en) * | 1981-08-05 | 1985-01-09 | Cresta Tech | Rotary filter |
US5108592A (en) | 1990-04-09 | 1992-04-28 | Perfection Sprinkler Co. | Rotary self-cleaning strainer simultaneously cleaned and rotated by nozzle structure |
AT398389B (en) | 1992-11-06 | 1994-11-25 | Andritz Patentverwaltung | METHOD AND SYSTEM FOR SEPARATING SOLID / LIQUID MIXTURES |
US6508933B2 (en) | 2000-04-24 | 2003-01-21 | Perfection Sprinkler Co. | Self-cleaning shallow water strainer |
DE10302494B3 (en) * | 2003-01-23 | 2004-09-16 | Hans Huber Ag Maschinen- Und Anlagenbau | Device for removing screenings from liquid flowing in a channel |
US6955266B2 (en) | 2003-01-24 | 2005-10-18 | Carrier Corporation | Strainer |
WO2005045143A2 (en) | 2003-10-29 | 2005-05-19 | Shell Oil Company | Water intake systems for structures |
US20060207927A1 (en) * | 2005-03-18 | 2006-09-21 | Tirakian Edward L | Garnet filtration system for use with water jet cutting tools |
CN201183761Y (en) | 2008-02-27 | 2009-01-21 | 浙江德安新技术发展有限公司 | By-pass flow processing system for recirculated cooling water |
US8871100B2 (en) | 2011-12-30 | 2014-10-28 | SPX APV Denmark A/S | Rotating strainer |
US8800496B1 (en) | 2013-03-15 | 2014-08-12 | Stephen D. Roche | Self-cleaning pre-filter for a water circulation pump |
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