CN1380948A - Wireless intrinsically safe valve - Google Patents
Wireless intrinsically safe valve Download PDFInfo
- Publication number
- CN1380948A CN1380948A CN 01800079 CN01800079A CN1380948A CN 1380948 A CN1380948 A CN 1380948A CN 01800079 CN01800079 CN 01800079 CN 01800079 A CN01800079 A CN 01800079A CN 1380948 A CN1380948 A CN 1380948A
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- China
- Prior art keywords
- signal
- valve
- optical
- transmitter
- valve control
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Fluid-Driven Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Circuits Of Receivers In General (AREA)
- Servomotors (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Optical Communication System (AREA)
Abstract
A valve system (10) that employs a piezo-electric element (38) to activate a fluid flow valve (18) so as to use a minimal amount of electrical energy. The piezo-electric element (38) activates a pilot pressure valve (36), which allows a control fluid to pass to a main control valve (44). The control fluid causes the main control valve (44) to activate a working element (16), which in turn operates the fluid flow valve (18). A switching assembly (70) is employed to activate the piezo-electric element (38). The switching assembly (70) can include various types of switching devices, such as RF switching devices, optical switching devices, infrared switching devices and low voltage electrical switching devices.
Description
Technical field
The present invention relates generally to intrinsic (intrinsically) safety valve, relate in particular to the valve that uses the minimum piezo-electric element of work energy.
Background technique
Flammable chemical substance is used and/or produces in many industry.These industry must pay special attention to prevent that this chemical substance from lighting, to stop fire or blast.The chemical product system administration request thinks better of and makes the possibility of lighting this chemical substance reduce to minimum.The chemical product management system typically is designed so that arcing and the spark minimum that switching circuit often causes.The circuit and the switching element of current this chemical product management system utilization costliness are realized this target.
An object lesson of this chemical product management system is to use solenoid valve, and purpose is that the mobile valve element is controlled flowing of flammable chemical substance.What current system used is expensive low spark device.These devices comprise no spark circuit and no spark switch, owing to need a large amount of shielded lines and enclosed switch, so cost is very high.Even these switches typically work in signal voltage level, rather than higher operational voltage level, the minimum spark under the flammable environment of height also can cause extremely dangerous circumstances.
Therefore, need provide a kind of intrinsically safe valve that in the chemical product management system, can reduce the main valve cost.
Summary of the invention
According to statement of the present invention, a kind of a kind of lower voltage components of utilizing is disclosed, as the piezo-electric element, activate fluid flow valve so that the minimum system of electric energy that uses.In one embodiment, the piezo-electric element activates pilot (pilot pressure) valve, and the pilot valve makes control flows pass through a main control valve.Control flows makes main control valve activate a working cell, and the working cell is controlled this fluid flow valve again.Switch block is used for activating this piezo-electric element.Switch block can comprise various types of switching devices, as RF switching device, optical switching device, infrared switch equipment and low voltage electric switching system, makes that valve can be by remote control.
For understanding the present invention more fully, its purpose and advantage should be with reference to following detailed description and accompanying drawings.
Description of drawings
Should get in touch the accompanying drawing that constitutes the necessary part of this specification and read this specification, and similar aid mark is used for indicating the same components of each accompanying drawing.
Fig. 1 is for according to one embodiment of present invention, by the schematic block diagram of the intrinsically safe valve of a RF signal activation;
Fig. 2 is for according to another embodiment of the present invention, by the schematic block diagram of the intrinsically safe valve of an optical signalling activation;
Fig. 3 uses the switching system schematic block diagram of the valve assembly of optical switching device for according to another embodiment of the present invention;
Fig. 4 uses the switching system schematic block diagram of the valve assembly of optical switching device for according to another embodiment of the present invention;
Fig. 5 uses the switching system schematic block diagram of the valve assembly of optical switching device for according to another embodiment of the present invention;
Fig. 6 is for according to another embodiment of the present invention, makes to use up-the switching system schematic block diagram of the valve assembly of Coupler switching device; And
Fig. 7 uses the switching system schematic block diagram of the valve assembly of infrared switch equipment for according to another embodiment of the present invention.
Embodiment
Fig. 1 is the planimetric map according to intrinsic safety valve system 10 of the present invention.Safety valve system 10 comprises valve activation component 12, transmitter 14, working cell 16 and fluid valve 18.Transmitter 14 is from signal 24 of antenna 26 emission, and this signal is by antenna 30 receptions relevant with valve assembly 12.In this embodiment, signal 24 is the RF signal, but below will go through, and also can use other signal, as, optical signalling, infrared signal and low voltage signal.Signal 24 can be by transmitter 14 codings, so that have only a specific valve assembly 12 response signal 24 to work.Therefore, valve assembly 12 can addressing, so that a specific valve assembly 12 is made a distinction from other valve assemblys.When valve assembly 12 receives signal 24, activate working cell 16, working cell 16 opens or closes fluid valve 18 according to its conventional state again.Valve 18 control chemical substances flowing between first side 20 and second side 22.Valve 18 can be the actuator that works in any kind under the low voltage.Especially valve 18 can be any activated apparatus that can benefit from system described here.
Receiving machine 28 comprises detector 30, detects the signal 24 from antenna 30.Battery 32 provides electric energy for receiving machine 28.Receiving machine 28 comprises a non-contact switch 34, and response is from the signal 24 of antenna 30.If transmitter 14 code signals 24, have only so when receiving machine 28 during for the receiving machine of address right non-contact switch 34 just respond.
Receiving machine 28 is exported an electrical signal to pilot valve 36 by non-contact switch 34.Pilot valve 36 comprises a piezo-electric switch block 38, is connected to the valve body 40 of valve 36.Switch block 38 comprises a piezo-electric element, voltage of its structural response changes, and this is fine understanding technically.This piezo-electric element can be any piezo-electric element that is suitable for describing at this purpose.In optional embodiment, this piezo-electric element can be the lower voltage components that is suitable for describing at this other type of purpose, as using the element of bender element technology, as ceramic component.Valve 36 is the two-position valve, is guiding under the pressure to guide wire 42 input airs.Assembly 38 has a dividing plate (not shown), and applying behind the voltage is deflection.An osculum has been opened in the deflection of dividing plate, makes air be applied to guide wire 42 under guiding pressure, and is applied to main slide valve or poppet valve 44.Pilot valve 36 is preferably the pilot valve of selling on the market.
Applying of main valve 44 control input airs, and exhausting air is to working cell 16.Especially, in case apply a guiding pressure from guide wire 42, main valve 44 just provides input air with displacement working cell 16.Working cell 16 can be used as pneumatic, the slewing maneuver device of valve 18.Therefore valve 18 can be fly valve, so that the displacement energy switch valve 18 of working cell 16.In case do not apply the electrical signal of receiving machine 28 outputs, pilot valve 36 just stops to provide guiding pressure to guide wire 42.This makes main valve 44 be displaced to a deactuate (deactuated) position, and this makes working cell 16 be displaced to its initial position, thus cut-off valve 18.
Fig. 2 has described intrinsic safety valve system 50 according to another embodiment of the present invention.The similar of valve system 50 is in valve system 10, and similarly aid mark will be used to indicate similar units.Because the operation of similar units is described as Fig. 1 among Fig. 2, therefore in Fig. 2, no longer describe.
The actuation technology that the most usefully is used for maneuvering pilot valve 36 in the system 50.Especially, optical actuation system 52 has substituted transmitter 14 and the receiving machine 28 in the system 10.System 52 comprises a fiber switch 54, and optical signal of its output is to optical cable 56.Optical cable 56 applies this optical signal to optic fibre detector 58.Optic fibre detector 58 will be converted to voltage from the optical signal of switch 54, be used for the assembly 38 of maneuvering pilot valve 36.Optic fibre detector 58 these electrical signal of output are to lead 60.
The above embodiments have several advantages.Master cock apart from the far conventional system of actual valve in, must between switch and valve, provide electric lead.Because the intrinsic safety system requirements uses explosion-proof circuit, therefore give the time-consuming thing that takes again of these electric lead alignments.Yet in the present invention,, and need not directly connect, therefore need not the alignment electric lead by electric lead because transmitter 14 only needs electromagnetism to link to each other with receiving machine 28.The present invention can save cost thus greatly.
In addition, use piezo-electric element and pilot valve 36 to avoid being connected and arcing that disconnection produces owing to electric switch.Electric energy that need only minute quantity provides a kind of intrinsic safety valve system thus with regard to actuatable pilot valve 36.In addition because 38 of receiving machine 28 and assemblies need little energy, so battery 32 can be long-time driven valve system 10 quite long battery life is provided.For Fig. 2,, therefore can not use battery 32 because optical signal provides enough voltage for manipulation component 38.
Fig. 3 is the schematic block diagram of the threshold switch system 70 of some switching device in replaceable valve system 10 and 50, and it passes through will be clearly in this discussion.Especially, transmitter 14 and receiving machine 28 in the 70 energy replacement systems 10 of threshold switch system, and optical switch in the replacement system 50 54 and optic fibre detector 58.Pilot valve 36, main valve 44, working cell 16 and fluid valve 18 will be worked in mode discussed above.System 70 comprises a control panel 72, the piezo-electric element in its control unit 38.
Valve 18 is opened or closed by an optical signalling from light source 74 according to its rotine positioning.Light source 74 can be any selectively activated light source that is suitable for describing at this purpose.The optical signalling that light source 74 produces is propagated in the optical fiber 76 of fiber bundle 78.The light of launching from optical fiber 76 1 ends on light source 74 opposites is received by a plurality of solar cells 80 of arrangement in the battery pack 82.Solar cell 80 is an electrical signal with transform light energy, offers circuit 84.Electrical signal on the circuit 84 is amplified by DC-DC converter circuit 86 and becomes the signal level that is suitable for application-specific with amplification.In this embodiment, DC-DC converter circuit 86 amplifying signal level to 7.5 volt.Converter circuit 86 is not limited by this example, and any amplifier circuit that is suitable for describing at this purpose all can use.The electrical signal that is exaggerated on circuit 84 then is sent to control panel 72, activates this piezo-electric element so that switch pilot valve 36 in the above described manner.Solar cell 80, converter circuit 86 and control panel 72 all can place assembly 38 the insides.
Fig. 4 is a kind of schematic block diagram of threshold switch assembly 92, and it is a kind of modification of above-mentioned switch block 70.Switch block 92 drive controlling plates 94 are with the piezo-electric element in the control unit 38.In this embodiment, use 1.2 volts voltage to control this piezo-electric element.System 92 has a kind of special-purpose, and wherein single source drives many low voltage valve assemblys, and use one independently the low power optical signal independently control each separate valve.
In this embodiment, light source 96 provides optical signalling for a plurality of optical fiber 98 and 100, optical fiber 98 drive controlling plates 94 wherein, and optical cable 100 drives another threshold switch assembly (not shown).Light source 76 can be at this any light source that this switch block provides optical signalling to be discussed for a plurality of.Light source 76 is controlled two independently threshold switch assemblies in this embodiment, but those skilled in the art will appreciate that and can provide more optical fiber to connect light sources 96 to control more threshold switch assembly.Keeping light source 96, whenever luminous power like this needs any one of luminous power valve (PCC) power if just offering continuously.
A plurality of solar cells 104 that optical signalling from the optical cable 98 that optical cable 98 1 ends on light source 90 opposites are launched is arranged the solar battery group 106 receive.Solar cell 104 is an electric energy with transform light energy, offers circuit 108.Photodiode 110 is positioned on the electric wire 108, conducting when it receives optical signalling.In the time will activating valve 18, fiber optic emitter 112 as LED, is activated to provide an optical signalling to optical cable 114.Photodiode 110 receives from the light of the cable 114 1 ends emission on transmitter 112 opposites, and conducting is so that the electrical signal that solar cell 104 produces can activate control panel 94.Control panel 94 again the piezo-electric element in the activation component 38 to control pilot valve 36 as mentioned above.Solar cell 104, photodiode 110 and control panel 94 can place assembly 38 the insides.
Fig. 5 shows the schematic block diagram that is used for activating in the mode in this discussion another threshold switch system 120 of valve 18.System 120 comprises a control panel 122, and it utilizes the piezo-electric element in one 1.2 volts the signal activation assembly 38 and works.Switching system 120 comprises an optical transmission circuit 124, and this circuit comprises hand switch 126, DC power supply 128 (for example 9 FuDCYuan) again, and fibre optic transmitter 130 (as LED).When switch 126 cut out, the voltage that power supply 128 provides made transmitter 130 along optical cable 132 emission light.
System 120 also comprises a switch block 136, and assembly 136 comprises DC power supply 138 (as 1.5 volts DC power supply), and photodiode 140.When photodiode 140 received from the light time of optical cable 132 1 ends on transmitter 130 opposites emission, its conducting makes dc voltage excitation control panel 122 from power supply 138.As mentioned above, the piezo-electric element in control panel 122 activation components 38, the piezo-electric element is controlled pilot valve 36 again.Switch block 136 and control panel 122 can place assembly 38 the insides.
According to another low voltage application, Fig. 6 shows the schematic block diagram of threshold switch system 144, and there is a control panel 146 identical with control panel 122 in system 144, and a switch block 148 that is similar to switch block 136.Switch block 148 comprises DC power supply 150 and light-Coupler 152 of replacing photodiode 140.Optical coupler 152 receives the low voltage signal from suitable power supply 154, and this signal makes light-Coupler 152 conductings and encourage control panel 146.
Fig. 7 is the schematic block diagram of threshold switch system 158, system 158 comprise one with above-mentioned control panel 122 and 146 identical control panels 160, and switch block 162 that is similar to switch block 136 and 148.Switch block 162 comprises DC power supply 164, capacitor 166 and infrared source 168.A low voltage signal is applied to infrared source 168, makes capacitor 166 conductings with excitation control panel 160.
Though the present invention describes with its currently preferred forms, it should be understood that the present invention also exists various application and device.Therefore can carry out various improvement and variation to the present invention, and not depart from the spirit of the present invention of appended claims statement.
Claims (30)
1. system that is used to control actuator, described system comprises:
A switch block is used to produce a valve control signal;
A pilot valve comprises a lower voltage components, and described lower voltage components responds this valve control signal, and directed stream pressure of described pilot valve control is to respond this valve control signal; And
A main valve responds this guiding pressure, and described main valve applies a working pressure with control unit relevant with this break of displacement.
2. according to the system of claim 1, wherein switch block comprises a transmitter and a receiving machine, RF signal of described transmitter emission, and described receiving machine receives this RF signal, described receiving machine produces this valve control signal to respond this RF signal.
3. according to the system of claim 1, wherein switch block comprises an optical switch and a fluorescence detector, and described optical switch produces an optical signal, is received by fluorescence detector, and described fluorescence detector produces this valve control signal to respond this optical signal.
4. according to the system of claim 1, wherein switch block comprises a light source and at least one solar cell, described light source produces a light signal, it is received by at least one solar cell, described solar cell produces this valve control signal to respond this optical signal, and described control signal is an electrical signal.
5. according to the system of claim 4, wherein switch block comprises an amplifier circuit, and described amplifier circuit amplified this valve control electrical signal before valve control signal is applied to this lower voltage components.
6. according to the system of claim 5, wherein amplifier circuit amplifies this valve control electrical signal to about 7.5 volts.
7. according to the system of claim 4, wherein switch block also comprises an optical transmitting set and a photodiode, described photodiode is on the circuit between at least one solar cell and the lower voltage components, described photodiode response is from the optical transmitting set signal of optical transmitting set, this optical transmitting set signal of described photodiode response and conducting are to allow this valve control signal excitation lower voltage components.
8. according to the system of claim 1, wherein switch block comprises a switching device, this switching device has an optical device and a DC power supply, and described DC power supply provides this valve control signal, and described optical device by this valve control signal to respond a switching signal.
9. system according to Claim 8, wherein this optical device is a photodiode, and switching signal is an optical signal.
10. system according to Claim 8, wherein optical device is an optical coupler, and switching signal is a low voltage signal.
11. system according to Claim 8, wherein this optical device is an infrared equipment, and switching signal is a low voltage signal.
12. system according to Claim 8, wherein switch block also comprises an optical transmitting set equipment, and described optical transmitting set equipment produces this switching signal.
13. according to the system of claim 12, wherein optical transmitting set equipment comprises an optical transmitting set, a DC power supply and a hand switch, described hand switch is activated so that the DC power supply encourages this optical transmitting set and produces switching signal.
14. according to the system of claim 1, wherein lower voltage components is the piezo-electric element.
15. according to the system of claim 1, wherein lower voltage components is a ceramic component.
16. according to the system of claim 1, wherein actuator is the chemical product fluid flow valve.
17. a valve system that is used for the Control work valve, described system comprises:
A switching circuit is used to produce a valve control electrical signal, and described switching circuit comprises at least one optical device;
A transmitter apparatus is used to produce a transmitter signal, and described switching circuit responds this transmitter signal;
A control valve assembly comprises a piezoelectric element, and described piezoelectric element responds this valve control signal, and described valve assembly control fluid stream is to respond this valve control signal, described this operating valve of fluid current control.
18. system according to claim 17, wherein transmitter apparatus comprises a light source, and switching circuit comprises at least one solar cell, described light source produces one first optical signal, it is received by at least one solar cell, and described at least one solar cell produces this valve control signal to respond this optical signal.
19. according to the system of claim 18, wherein switching circuit comprises an amplifier circuit, described amplifier circuit amplified this valve control signal before valve control signal is applied to piezoelectric element.
20. system according to claim 18, wherein switching circuit also comprises a photodiode, and transmitter apparatus comprises an optical sender, described photodiode is on the circuit between at least one solar cell and the piezoelectric element, described photodiode response is from one second optical signal of optical sender, and this second optical signal conducting of described photodiode response is so that this valve control signal encourages this piezoelectric element.
21. according to the system of claim 17, wherein switching circuit comprises a DC power supply, described DC power supply provides this valve control signal, and described at least one optical device by this valve control signal to respond this transmitter signal.
22. according to the system of claim 21, wherein optical device is a photodiode, and transmitter signal is an optical signal.
23. according to the system of claim 21, wherein optical device is an optical coupler, and transmitter signal is a low voltage signal.
24. according to the system of claim 21, wherein optical device is an infrared equipment, and transmitter signal is a low voltage signal.
25. according to the system of claim 17, wherein transmitter apparatus comprises an optical sender, a DC power supply and a hand switch, described hand switch is activated so that DC power supply exciting light transmitter and produce transmitter signal.
26. a valve system that is used to control unstable chemical product stream, described valve system comprises:
A distance transmitter, described transmitter produces a valve activation signal;
A receiving machine, described receiving machine produce a piezoelectric element signal to respond this activation signal;
An assembly that comprises piezoelectric element, described assembly produce a steering signal with response piezoelectric element signal;
A pilot valve, described pilot valve is guided pressure to respond this steering signal by one;
A main valve, described main valve produce a control signal to respond this guiding pressure;
A working cell responds this control signal; And
A fluid flow valve, be used to control chemical product from first effluent to second side, described fluid flow valve is by the working cell displacement.
27. according to the system of claim 26, wherein transmitter is the RF transmitter, activation signal is the RF signal, and receiving machine is the RF receiving machine.
28. according to the system of claim 26, wherein transmitter is an optical transmitter, activation signal is an optical signalling, and receiving machine is a fluorescence detector.
29. according to the system of claim 28, wherein fluorescence detector is to select from the group that comprises photodiode and solar cell.
30. according to the system of claim 28, wherein transmitter is to select from the group that comprises infrared equipment, LED equipment and light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19106600P | 2000-03-21 | 2000-03-21 | |
| US60/191,066 | 2000-03-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1380948A true CN1380948A (en) | 2002-11-20 |
| CN1288355C CN1288355C (en) | 2006-12-06 |
Family
ID=22704000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01800079 Expired - Fee Related CN1288355C (en) | 2000-03-21 | 2001-03-20 | Wireless intrinsically safe valve |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1266143B2 (en) |
| JP (1) | JP4798922B2 (en) |
| CN (1) | CN1288355C (en) |
| AU (1) | AU2001245873A1 (en) |
| BR (1) | BR0102829B1 (en) |
| CA (1) | CA2356753C (en) |
| DE (1) | DE60112904T3 (en) |
| ES (1) | ES2247084T3 (en) |
| MX (1) | MXPA01007353A (en) |
| WO (1) | WO2001071198A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840385A (en) * | 2011-06-23 | 2012-12-26 | 通用设备和制造公司 | Automatic speed searching device and method for partial stroke test of control valve |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006041601A1 (en) * | 2006-09-05 | 2008-03-06 | ITW Oberflächentechnik GmbH & Co. KG | Control device of a compressed air motor, in particular in combination with a pump and a spray coating system |
| DE102013007927B4 (en) * | 2013-05-10 | 2014-12-24 | Hoerbiger Automatisierungstechnik Holding Gmbh | drive unit |
| GB201313804D0 (en) * | 2013-08-01 | 2013-09-18 | Moog Controls Ltd | Improvements in hydraulic servovalves |
| JP6007922B2 (en) | 2014-01-07 | 2016-10-19 | 横河電機株式会社 | Contact signal converter |
| US9958880B2 (en) | 2015-09-16 | 2018-05-01 | Fisher Controls International Llc | Wireless valve actuator system and method |
| SE541705C2 (en) | 2016-10-10 | 2019-12-03 | Aaloe Ab | An implement and method for controlling the implement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH563532A5 (en) * | 1973-03-14 | 1975-06-30 | Buehler Ag Geb | |
| US4132071A (en) † | 1977-10-11 | 1979-01-02 | Hills-Mccanna Company | Electro-hydraulic controlled valve actuator system |
| JPS5569375A (en) * | 1978-11-20 | 1980-05-24 | Tlv Co Ltd | Electric valve |
| US4443853A (en) * | 1981-03-25 | 1984-04-17 | United Technologies Corporation | Optical digital servo control system |
| US4412355A (en) * | 1981-10-14 | 1983-10-25 | Hughes Aircraft Company | Push-button operated electrical power source for an optical communication link |
| JPH02190683A (en) * | 1989-01-18 | 1990-07-26 | Toshiba Corp | Pilot valve device |
| DE4105062C2 (en) † | 1990-09-19 | 1997-01-23 | Helmut Prof Dipl Ing Hoenicke | Electropneumatic positioner with pulse width control |
| DE4116570A1 (en) * | 1991-05-21 | 1992-11-26 | Herion Werke Kg | METHOD AND ARRANGEMENT FOR CONTROLLING VALVES |
| US5101862A (en) † | 1991-08-08 | 1992-04-07 | Leete Barrett C | Rotary actuator and valve control system |
| US5447286A (en) * | 1994-01-21 | 1995-09-05 | Deka Products Limited Partnership | High flow valve |
| US5543627A (en) * | 1994-09-23 | 1996-08-06 | The Boeing Company | Method for maximizing the solar cell OPTO-electronic conversion efficiency in optically controlled hydraulic actuators |
| US5709245A (en) * | 1994-09-23 | 1998-01-20 | The Boeing Company | Optically controlled actuator |
| JPH08226402A (en) * | 1995-02-21 | 1996-09-03 | Fuji Electric Co Ltd | Valve controller |
| US5706852A (en) * | 1995-10-03 | 1998-01-13 | Deville; Wayne E. | Multi-orifice plate carrier and fitting with positioner, differential selector and horizontal adjusting bar |
| AT407432B (en) * | 1998-03-18 | 2001-03-26 | Hygrama Ag | PIEZOELECTRIC VALVE |
-
2001
- 2001-03-20 MX MXPA01007353A patent/MXPA01007353A/en active IP Right Grant
- 2001-03-20 DE DE60112904T patent/DE60112904T3/en not_active Expired - Lifetime
- 2001-03-20 ES ES01918848T patent/ES2247084T3/en not_active Expired - Lifetime
- 2001-03-20 BR BRPI0102829-4A patent/BR0102829B1/en not_active IP Right Cessation
- 2001-03-20 CA CA002356753A patent/CA2356753C/en not_active Expired - Fee Related
- 2001-03-20 JP JP2001569152A patent/JP4798922B2/en not_active Expired - Fee Related
- 2001-03-20 AU AU2001245873A patent/AU2001245873A1/en not_active Abandoned
- 2001-03-20 EP EP01918848A patent/EP1266143B2/en not_active Expired - Lifetime
- 2001-03-20 WO PCT/US2001/008869 patent/WO2001071198A2/en active IP Right Grant
- 2001-03-20 CN CN 01800079 patent/CN1288355C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840385A (en) * | 2011-06-23 | 2012-12-26 | 通用设备和制造公司 | Automatic speed searching device and method for partial stroke test of control valve |
| CN102840385B (en) * | 2011-06-23 | 2017-11-24 | 通用设备和制造公司 | The automatic speed searching device and method of the pratial stroke test of control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2356753C (en) | 2006-10-03 |
| JP2003528269A (en) | 2003-09-24 |
| WO2001071198A2 (en) | 2001-09-27 |
| EP1266143B2 (en) | 2010-01-20 |
| JP4798922B2 (en) | 2011-10-19 |
| EP1266143B1 (en) | 2005-08-24 |
| AU2001245873A1 (en) | 2001-10-03 |
| CA2356753A1 (en) | 2001-09-21 |
| EP1266143A2 (en) | 2002-12-18 |
| DE60112904D1 (en) | 2005-09-29 |
| BR0102829B1 (en) | 2011-09-06 |
| DE60112904T2 (en) | 2006-06-08 |
| WO2001071198A3 (en) | 2002-04-18 |
| ES2247084T3 (en) | 2006-03-01 |
| BR0102829A (en) | 2002-04-23 |
| CN1288355C (en) | 2006-12-06 |
| DE60112904T3 (en) | 2010-08-05 |
| MXPA01007353A (en) | 2003-06-06 |
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