CN101943291A - The valve of belt sensor - Google Patents
The valve of belt sensor Download PDFInfo
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- CN101943291A CN101943291A CN2010102214609A CN201010221460A CN101943291A CN 101943291 A CN101943291 A CN 101943291A CN 2010102214609 A CN2010102214609 A CN 2010102214609A CN 201010221460 A CN201010221460 A CN 201010221460A CN 101943291 A CN101943291 A CN 101943291A
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- valve
- photoreceptor
- processor module
- light source
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- 108091008695 photoreceptors Proteins 0.000 claims abstract description 70
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000006866 deterioration Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 9
- 230000004044 response Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- FRLJSGOEGLARCA-UHFFFAOYSA-N cadmium sulfide Chemical compound [S-2].[Cd+2] FRLJSGOEGLARCA-UHFFFAOYSA-N 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
A kind of valve is provided according to one embodiment of present invention.This valve comprises piston (104), surrounds the shell (106) of described piston (104), enters the mouth (108), exports (110), light source (112) and photoreceptor (114), inlet (108) can allow that fluid enters valve, outlet (110) can allow that fluid flows out valve, light source (112) can be launched the light that points to piston (104), photoreceptor (114) can be measured the light intensity that receives from light source (112), described intensity based on described piston in shell the position and change.A kind of piston assembly also is provided according to one embodiment of present invention, and wherein light source (608) and photoreceptor (610) can be used for determining position of piston.A kind of system that is used to obtain with the analysis operation status information is provided according to one embodiment of present invention.Can automatically take action according to the serviceability of being analyzed.A kind of method that is used for automatically valve being carried out diagnostic operation is provided.Output based on diagnostic operation can be carried out a kind of safety specification.
Description
The application is that (the China national application number is 200580052509.X for the PCT patent application in China national stage that enters of submitting on November 22nd, 2005, international application no is PCT/US/2005/043310, and denomination of invention is " VALVE WITH SENSOR ") divide an application.
Background of invention
Valve is a kind of mechanical device, and it can be by opening or the active part of blocking channel starts, stops or adjusting flowing of fluid.Valve can be manually, pneumatically, hydraulically, mechanically, electrically or utilize its combination and control.Valve can be used for multiple purpose, comprises flow control, pressure control and direction control.
Up to now, the operator with system of one or more valves must infer or estimate valve motion by the electric current of measuring in one or more and the electromagnetic coil that each valve is associated.Yet, measure electric current by this way whether any closing valve mobile immediate data of reality that has can be provided.Similarly, in fact whether the electric current from electromagnetic coil can not be distinguished any fluid in the valve.
Brief summary of the invention
According to one embodiment of present invention, provide a kind of valve.This valve comprises piston, surrounds shell, inlet, outlet, light source and the photoreceptor of piston, inlet can allow that fluid enters valve, outlet can allow that fluid flows out valve, light source can be launched the light that points to piston, photoreceptor can be measured the light intensity that receives from light source, described intensity based on piston in shell the position and change.
According to one embodiment of present invention, provide a kind of system that is used to obtain with the analysis operation status information.Sensor assembly is measured the operational status information about valve.The valve control module is controlled this valve.Processor module analysis operation status information.At last, input/output module display operation status information, and allow user's control processing device module.
A kind of method that is used for automatically valve being carried out diagnostic operation is provided.At first, actuate valve.Secondly, receive the operational status information relevant with valve.At last, determine whether valve is operated in acceptable parameter.
According to another embodiment of the present invention, provide a kind of piston assembly.This piston assembly comprises piston, surrounds the shell of piston, can allow that fluid flows into and flow out passage, light source and the photoreceptor of shell, light source can be launched the light that points to piston, photoreceptor can be measured the light intensity that receives from light source, described intensity based on piston in shell the position and change.Many aspects of the present invention
In an embodiment of valve, photoreceptor output and the corresponding voltage of digital bit value.
In another embodiment of valve, photoreceptor output and the corresponding voltage of the analogue value.
In the another embodiment of valve, directly propagate on the photoreceptor from the light that light source receives from light source by photoreceptor.
In the another embodiment of valve, propagate on the photoreceptor from light source by reflection indirectly from the light that light source receives by photoreceptor.
In the another embodiment of valve, light source can be launched the light of multiple intensity.
In the another embodiment of valve, high light intensity can be used for checking light source and photoreceptor to turn round.
In the another embodiment of valve, photoreceptor substantially with shell in light source adjacent.
In the another embodiment of valve, photoreceptor is relative with light source in the shell substantially.
In the another embodiment of valve, piston comprises sliding spool.
In the another embodiment of valve, piston comprises poppe tvalve core.
In an embodiment of system, processor module can start one or more actions based on operational status information, and described one or more actions are selected from the group that comprises following action: return back to the safety valve state, throttle down, the interim valve operation of ending, increase the valve electric current, reduce the valve electric current, fluid is changed its course flow to one or more other valves, trigger alarm, show alert message, show error message, operational state data is sent to one or more other nodes on the industrial network, alert message is sent to one or more other nodes on the industrial network, error message is sent to one or more other nodes and recording events daily record in storage on the industrial network.
In another embodiment of system, sensor assembly comprises one or more light source and one or more photoreceptors that are arranged in valve housing that are arranged in valve housing.
In the another embodiment of system, sensor assembly comprises one or more pressure transducers that are arranged in valve inlet.
In another embodiment, one or more pressure transducers are used to follow the tracks of the valve supply pressure relevant with minimum pressure threshold.
In another embodiment, one or more pressure transducers are used to follow the tracks of the valve supply pressure relevant with the pressure maximum threshold value.
In the another embodiment of system, one or more pressure transducers are used to detect soft start.
In the another embodiment of system, sensor assembly comprises one or more temperature transducers that are arranged in valve inlet.
In the another embodiment of system, the use data of processor module tracks valve.
In the another embodiment of system, processor module uses these use data to predict the residual life of valve.
In the another embodiment of system, processor module tracks is for the cycle time of valve.
In the another embodiment of system, processor module uses and follows the tracks of the deterioration of valve this cycle time.
In an embodiment of this method, carry out a kind of safety specification.
In another embodiment of this method, safety specification is made up of one or more actions, and described one or more actions are selected from the group that comprises following action: return back to the safety valve state, throttle down, the interim valve operation of ending, increase the valve electric current, reduce the valve electric current, fluid is changed its course flow to one or more other valves, trigger alarm, show alert message, show error message, operational state data is sent to one or more other nodes on the industrial network, alert message is sent to one or more other nodes on the industrial network, error message is sent to one or more other nodes and recording events daily record in storage on the industrial network.
In an embodiment of piston assembly, directly propagate on the photoreceptor from the light that light source receives from light source by photoreceptor.
In the another embodiment of piston assembly, propagate on the photoreceptor from light source by reflection indirectly from the light that light source receives by photoreceptor.
The drawing explanation
Should understand not necessarily drafting in proportion of drawing.
Fig. 1 has shown the valve according to an embodiment of this requirement invention.
Fig. 2 is the skeleton diagram that comprises the module of one embodiment of the invention.
Fig. 3 has shown the operating process of the operation of carrying out according to one embodiment of the invention.
Fig. 4 has shown the guiding valve according to an embodiment of this requirement invention.
Fig. 5 has shown the poppet valve according to an embodiment of this requirement invention.
Fig. 6 has shown the piston assembly according to an embodiment of this requirement invention.
Detailed description of the present invention
By light source and photoreceptor are placed in the shell or piston hole of valve, direct measured operational state information.Fig. 1 has shown that one is shown in an open position 100 and the exemplary embodiment of the valve of closed position 102.Piston 104 can move up and down in shell 106, with flowing of control fluid (not shown).When valve is shown in an open position 100, allow that fluid flows at inlet 108 with between exporting 110.On the contrary, in the closed position 102 the time when valve, stop fluid 108 to enter shell by entering the mouth.
In one embodiment, when valve is shown in an open position 100, brighter when there is not fluid in the light that photoreceptor 114 receives from light source 112 valve than usual.Therefore light source 112 and photoreceptor 114 can be used for the problem that test fluid is supplied with.
In one embodiment, when reaching specific photo threshold, photoreceptor 114 has numeral output " 1 " (opening), otherwise is numeral output " 0 " (closing).In another embodiment, can manually set or the photo threshold of programmed settings photoreceptor 114.In an alternative, photoreceptor 114 is exported the analog approximation value of the gray scale on linearity or non-linear domain, and by controller or microprocessor described analog approximation value is decoded into " opening " or " closing " value.The output of photoreceptor 114 can be negated before measuring, and/or carries out logical combination with other output about the photoreceptor (not shown) of identical piston or another piston, and this does not break away from the scope of the present patent application.In one embodiment, can there be a plurality of photoreceptors in the diverse location in shell 106, so that provide position data with bigger spatial resolution.
Fig. 2 has shown an embodiment's who comprises this requirement invention module, wherein can automatically observe operational status information by processor module 208, and it is worked.Valve 202 can open and close one or more passages that pass valve housing.Sensor assembly 204 is connected on the valve, and measures the each side of the serviceability of valve 202, for example valve location, static valve pressure, dynamically in time pulsation of valve pressure, pressure, valve temperature etc.In one embodiment, sensor assembly 204 comprises the photoreceptor that is used for determining valve location, as above in conjunction with Figure 1.In another embodiment, sensor assembly 204 comprises one or more temperature transducers and/or one or more pressure transducer.In an alternative, sensor assembly 204 comprises the sensor of one or more other types as known in the art.
Valve control module 206 control valves 202, more particularly, the one or more moving elements of this valve control module 206 in can control valve 202, for example sliding spool, piston, poppe tvalve core, spheroid, diskware, door part, needle or other mechanism.In one embodiment, valve control module 206 how many electric currents of control pass the coil that is associated with valve 202.Given sensor assembly 204 can be used for monitoring a plurality of similar types or sensors of various types.Similarly, given a plurality of similar types of valve control module 206 may command or dissimilar valves.
Processor module 208 comprises microprocessor or microcontroller, and it can carry out user command, and the operational diagnostics program, and comprises the storage that is used to store data and/or diagnostic routine.In one embodiment, processor module 208 is personal computer (PC).Storage can comprise storage or its combination of SRAM (static RAM), DRM (dynamic random access memory), ROM (ROM (read-only memory)), flash memory, hard disk drive or other type.Diagnostic routine can comprise the software that is suitable for processor module 208 and carries out, firmware or its combination that is suitable for processor module 208 execution.Processor module 208 sending controling instructions are given valve control module 206, and receive the operational status information from sensor assembly 204.I/O (I/O) module 210 shows the output of from processor modules 208, and allows that user and processor module 208 are mutual.The user can utilize I/O module 210 to carry out diagnostic routine, control valve, and the serviceability of check valve.In one embodiment, I/O module 210 allows that the user writes diagnostic routine.In another embodiment, but the relevant past of user's access for the historical data of the diagnostic measures of given valve.
Processor module 208 allows that carrying out senior valve diagnosis tests.For example, but valve control module 206 is given in processor module 208 issue an orders, to change the position of valve 202, monitor input afterwards from sensor assembly 204, to determine the valve stroke time (in the 206 beginning control operations of valve control module, and the time span between when valve 202 is finished its change in location according to sensor assembly 204).Because the valve possibility is quickened owing to its wearing and tearing or is slowed down, so can utilize processor module 208 to calculate and follow the tracks of the wearing and tearing of whole valve.In one embodiment, follow the tracks of historical data, thereby can estimate the wearing and tearing on the valve 202 about the travel time of valve 202.When valve 202 begins to wear and tear, warning message can be shown to the user by I/O module 210.Alternatively,, fluid flow path can be changed to other valve (not shown) than less wear when valve 202 wearing and tearing or when beginning to wear and tear, in the time can keeping in repair or change valve 202 till.In another embodiment, on a plurality of valves of system, follow the tracks of wear data, discerning the weak link in this system so that change, when perhaps breaking down in system as the starting point of malfunction elimination.
In one embodiment, processor module 208 is warned the imminent fault of user together with I/O module 210.In another embodiment, which type of corrective action processor module 208 needs to repair fault together with 210 indications of I/O module.Processor module 208 also can be under the help of I/O module 210, for the user provides one or more failure causes, or one or more possible failure cause.
In another embodiment, processor module 208 is followed the tracks of the supply pressure of valve 202 ingress together with sensor assembly 204.Processor module 208 compares supply pressure and minimum threshold, and problem is sent signal, and if/or supply pressure be lower than minimum threshold then take corrective action.In another embodiment, processor module 208 compares supply pressure and max-thresholds, and problem is sent signal, and if/or supply pressure be higher than max-thresholds then take corrective action.
In another embodiment, the valve supply pressure is used to detect soft start.Circulation in the soft start valve begins lentamente, thereby can not send shock wave in system fluid.On the contrary, the existence of soft start can be indicated escape of liquid or other problem in the non-soft start valve.Processor module 208 compares the Pressure Development that the supply pressure that observes develops the expection in (pressure progression) and the Soft Starting System, and problem sent signal, and if/or the pressure that on any point, observed surpass expecting pressure and just take corrective action.On the contrary, if processor module 208 detects in non-Soft Starting System, the pressure of being observed is lower than expecting pressure, and then processor module 208 can send signal to problem, and/or take corrective action.
Processor module 208 also can be followed the tracks of the valve travel time across several valves.Utilize this information, sequence valve (sequential operation is to finish the valve of multistage operations) can be regulated relative to each other.In one embodiment, processor unit 208 can use chronometric data, so that automatically regulate series of valves relative to each other.
Can be along with the time tracking valve stroke time, and use progressively changing of travel time to infer the deterioration of valve, and predict possible failsafe valve.
Also can follow the tracks of valve circuit number of times in the unit time, thus the utilization rate that can follow the tracks of valve.In one embodiment, this valve uses data to can be used for how many total specified circulations is based on valve, and/or predicts the residual life of valve based on the estimated time of breaking down until valve.
Fig. 3 has shown the operation of carrying out in an embodiment of this requirement invention, therefrom draws and the storage operation status data, and the acceptability of decision status data.Actuate operation 302 has been actuated an element in the valve.This element can be piston, sliding spool, spheroid, diskware, door part, needle or other device.
During actuating, receive operation 304 and receive the operational status information relevant with piston.Operational status information can comprise and utilizes light source and photoreceptor and the definite position of element in valve, existence by overvoltage or negative pressure in the determined valve of the pressure transducer in the valve inlet, by the determined valve temperature of the temperature transducer in valve inlet or the valve export, existence by vacuum in the determined valve of the pressure transducer in the valve inlet, the detection of soft start, the utilization rate of valve (comprising whether valve uses with the utilization rate that surpasses the valve specification), whether valve is near its end of life or out of Memory.
Determine operation 306 assessments by receiving operation 304 some that are received or all operational status informations, and the state of definite operational status information is whether in acceptable parameter area.Described acceptable parameter can be limited by the user, provides by valve manufacturer, and by the operational state data of computer based in the valve past, or based on the operational state data of one or more different valves and automatically calculate.
If the serviceability of valve is acceptable, flow process will branch to the terminal point of operating process by "Yes" so.Yet if the serviceability of valve is unacceptable, flow process will branch to executable operations 308 by "No" so.
In one embodiment, safety specification is included in industrial network (for example fieldbus networks) and goes up operational status information or warning or error message are sent to Section Point.Program on the Section Point or rules are determined the suitable response to this situation afterwards.In one embodiment, program or rules are also carried out this response on the Section Point.In an alternative, program on the Section Point or rules are sent to this response another node that is used to carry out.Section Point also can write down occurrence log.
Like this, can automatically solve or walk around problems with valves and need not user's input.In addition, can determine the problem of valve system as far as possible more apace.
Fig. 4 has shown light source 412 and the photoreceptor 414 in the shell 406 of guiding valve 402.Sliding spool 404 can move up and down in shell 406, with flowing of control fluid (not shown).When valve is in illustrated open position, allow that fluid is at inlet 408 with export between 410 around the center of sliding spool 404 and flow.On the contrary, when valve (not shown) in the closed position, stop fluid 408 to enter shell by entering the mouth.
In one embodiment, when valve is shown in an open position, brighter when there is not fluid in photoreceptor 414 from the comparable valve of light that light source 412 receives.Therefore light source 412 and photoreceptor 414 can be used for test fluid and supply with the problem that exists.
Fig. 5 has shown light source 510 and the photoreceptor 512 in the shell 504 of poppet valve in the closed position.Poppe tvalve core 502 can move up and pass the hole of shell 504, thereby opens the sealing that forms between poppe tvalve core 502 and shell 504, and allows that fluid is from entering the mouth 506 through flowing to outlet 508.Light source 510 emissions are by the light of poppe tvalve core 502 reflections.Measure the light of reflection at photoreceptor 512 places, photoreceptor 512 basically with shell 504 in light source 510 adjacent.Based on the catoptrical quantity of measuring, can determine the degree of approach of 502 pairs of photoreceptors 512 of poppe tvalve core.
Fig. 6 has shown light source 608 and the photoreceptor 610 in the shell 604 that piston hole is arranged.Fluid enters and leaves piston hole by passage 606.Light source 608 emissions are by the light of piston 602 reflections.Measure the light of reflection at photoreceptor 610 places, photoreceptor 610 basically with shell 604 in light source 608 adjacent.Based on the catoptrical quantity of measuring, can determine the degree of approach of 602 pairs of photoreceptors 610 of piston.
Above-mentioned various embodiment only provides in illustrational mode, and should not be considered to limit the present invention.Those of skill in the art should be realized that, under the condition of not following exemplary embodiment illustrated and described herein and application, and under the situation that does not break away from true spirit of the present invention that appended claims states and scope, but modifications and variations of the present invention are.
Claims (15)
1. system that is used to obtain and analyze the operational status information that closing valve is arranged, described system is characterized in that:
Valve;
Sensor assembly, it is used to measure the operational status information relevant with described valve;
The valve control module, it is used to control described valve;
Processor module, it is used to analyze described operational status information; With
Input/output module, it is used to show described operational status information, and allows that the user controls described processor module.
2. system according to claim 1 is characterized in that, described processor module can start one or more actions based on described operational status information, and described one or more actions are selected from the group that comprises following action:
Return back to the safety valve state, throttle down, the interim operation of ending valve, increase the valve electric current, reduce the valve electric current, fluid is changed its course flow to one or more other valves, trigger alarm, show alert message, show error message, operational state data is sent to one or more other nodes on the industrial network, alert message is sent to one or more other nodes on the industrial network, error message is sent to one or more other nodes and recording events daily record in storage on the industrial network.
3. system according to claim 1 is characterized in that, described sensor assembly comprises one or more light sources that are arranged in valve housing and the one or more photoreceptors that are arranged in valve housing.
4. system according to claim 1 is characterized in that, described sensor assembly comprises the one or more pressure transducers that are arranged in valve inlet.
5. system according to claim 1 is characterized in that, described one or more pressure transducers are used to follow the tracks of the valve supply pressure relevant with minimum pressure threshold.
6. system according to claim 1 is characterized in that, described one or more pressure transducers are used to follow the tracks of the valve supply pressure relevant with the pressure maximum threshold value.
7. system according to claim 1 is characterized in that, described one or more pressure transducers are used to detect soft start.
8. system according to claim 1 is characterized in that, described sensor assembly comprises the one or more temperature transducers that are arranged in valve inlet.
9. system according to claim 1 is characterized in that, described processor module tracks is for the use data of described valve.
10. system according to claim 9 is characterized in that, described processor module uses described use data to predict the residual life of described valve.
11. system according to claim 1 is characterized in that, described processor module tracks is for the cycle time of described valve.
12. system according to claim 10 is characterized in that, described processor module uses and follows the tracks of the deterioration of valve described cycle time.
13. a method that is used for automatically valve being carried out diagnostic operation, described method is characterized in that:
Actuate described valve;
Receive the operational status information relevant with described valve; With
Determine whether described valve is operated in acceptable parameter area.
14. method according to claim 13 is characterized in that, described method also comprises the execution safety specification.
15. method according to claim 14 is characterized in that, described safety specification comprises one or more actions of selecting from the group that comprises following action:
Return back to the safety valve state, throttle down, the interim operation of ending valve, increase the valve electric current, reduce the valve electric current, fluid is changed its course flow to one or more other valves, trigger alarm, show alert message, show error message, operational state data is sent to one or more other nodes on the industrial network, alert message is sent to one or more other nodes on the industrial network, error message is sent to one or more other nodes and recording events daily record in storage on the industrial network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102214609A CN101943291B (en) | 2005-11-22 | 2005-11-22 | Valve with sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102214609A CN101943291B (en) | 2005-11-22 | 2005-11-22 | Valve with sensor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580052509XA Division CN101360943B (en) | 2005-11-22 | 2005-11-22 | Valve having sensor |
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| CN101943291A true CN101943291A (en) | 2011-01-12 |
| CN101943291B CN101943291B (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102214609A Expired - Fee Related CN101943291B (en) | 2005-11-22 | 2005-11-22 | Valve with sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794254A (en) * | 2012-10-30 | 2014-05-14 | 波凯特有限公司 | Device for indicating the position of a valve spindle |
| CN104487664A (en) * | 2012-06-28 | 2015-04-01 | 弗瑞瓦勒夫股份公司 | Method and position sensor assembly for determining a mutual position between a first object and a second object |
| CN106763836A (en) * | 2015-11-23 | 2017-05-31 | 中国科学院沈阳科学仪器股份有限公司 | A kind of vacuum valve |
| CN109237055A (en) * | 2018-09-06 | 2019-01-18 | 豆群儒 | A kind of block valve and its application method of natural gas wellhead |
| CN109917826A (en) * | 2018-11-13 | 2019-06-21 | 中铸新材工业（江苏）有限公司 | A kind of flexibility with position signal releases ejector rod system |
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| US5197328A (en) * | 1988-08-25 | 1993-03-30 | Fisher Controls International, Inc. | Diagnostic apparatus and method for fluid control valves |
| CN1280259A (en) * | 1999-07-13 | 2001-01-17 | 速睦喜股份有限公司 | Pilot change-over valve with position detoction function |
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| US4523286A (en) * | 1981-08-07 | 1985-06-11 | Hitachi, Ltd. | Apparatus for making diagnosis of valve device in turbine system |
| US4816987A (en) * | 1985-06-28 | 1989-03-28 | Electric Power Research Institute, Inc. | Microprocessor-based control and diagnostic system for motor operated valves |
| US5433245A (en) * | 1993-08-16 | 1995-07-18 | Westinghouse Electric Corporation | Online valve diagnostic monitoring system having diagnostic couplings |
| CN1133837C (en) * | 2002-04-27 | 2004-01-07 | 浙江大学 | Bidirectional two-line intelligent valve |
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| US5197328A (en) * | 1988-08-25 | 1993-03-30 | Fisher Controls International, Inc. | Diagnostic apparatus and method for fluid control valves |
| CN1280259A (en) * | 1999-07-13 | 2001-01-17 | 速睦喜股份有限公司 | Pilot change-over valve with position detoction function |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487664A (en) * | 2012-06-28 | 2015-04-01 | 弗瑞瓦勒夫股份公司 | Method and position sensor assembly for determining a mutual position between a first object and a second object |
| CN104487664B (en) * | 2012-06-28 | 2017-10-17 | 弗瑞瓦勒夫股份公司 | Method and position sensor assembly for determining mutual alignment between the first object and the second object |
| CN103794254A (en) * | 2012-10-30 | 2014-05-14 | 波凯特有限公司 | Device for indicating the position of a valve spindle |
| US9518676B2 (en) | 2012-10-30 | 2016-12-13 | Buerkert Werke Gmbh | Device for indicating the position of a valve spindle |
| CN106763836A (en) * | 2015-11-23 | 2017-05-31 | 中国科学院沈阳科学仪器股份有限公司 | A kind of vacuum valve |
| CN109237055A (en) * | 2018-09-06 | 2019-01-18 | 豆群儒 | A kind of block valve and its application method of natural gas wellhead |
| CN109917826A (en) * | 2018-11-13 | 2019-06-21 | 中铸新材工业（江苏）有限公司 | A kind of flexibility with position signal releases ejector rod system |
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| Publication number | Publication date |
|---|---|
| CN101943291B (en) | 2013-12-04 |
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