CN104565506A - Explosion-proof hybrid electro-hydraulic integrated actuator for valve - Google Patents
Explosion-proof hybrid electro-hydraulic integrated actuator for valve Download PDFInfo
- Publication number
- CN104565506A CN104565506A CN201510018031.4A CN201510018031A CN104565506A CN 104565506 A CN104565506 A CN 104565506A CN 201510018031 A CN201510018031 A CN 201510018031A CN 104565506 A CN104565506 A CN 104565506A
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- Prior art keywords
- integrated
- explosion
- valve block
- fixed
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The invention discloses an explosion-proof hybrid electro-hydraulic integrated actuator for a valve. The actuator comprises electrical control box, double-acting cylinders and hydraulic power unit; with a piston displacement of the displacement sensors and detectors for detecting the pressure of the pressure on the double-acting cylinder sensor, double-acting cylinders driven by a hydraulic power unit telescopic movement; hydraulic power unit according to the motor, pump, manifold, valve blocks flow matching, piping and other integration body, the valve of the invention hybrid integrated electro-hydraulic explosion actuators, cylinders comes with displacement and pressure testing, to create conditions for the realization of high-precision positioning of double-loop control, modular design, functional and reasonable layout, and enhance the degree of integration and explosion-proof performance.
Description
Technical field
The present invention relates to a kind of electrohydraulic control, particularly relate to the double dynamical integrated explosion-proof electrohydraulic control of a kind of valve.
Background technique
Valve actuator is as a kind of power plant, combine the technology such as pneumatic, hydraulic pressure, mechanical transmission, control, electromechanics, computer, communication, accurately can control the position of valve fast, stably, now be widely used in the driving part of the field valves such as oil, electric power, water conservancy, metallurgy, papermaking, space flight, pipeline, petrochemical industry, industrial equipment, food processing.Electro-hydraulic actuator is one comparatively conventional in final controlling element, the speed that is generally applied to is fast, the occasion large, control accuracy is high of exerting oneself, upper-level control system issues instructions to actuator, actuating mechanism controls hydraulic power system drives valve to do linear motion, meanwhile, valve load also must detect, the various fault of intelligent diagnostics valve in real time in actuator.Maximum electro-hydraulic actuators is used to be servo valve control formula electro-hydraulic actuator in the market, adopt open-circuit hydraulic system, by controlling servovalve regulator solution force feed flow direction and uninterrupted, realize adjustment to controlled device, but have that cable exposes, integration degree is low, the technical problem of poor in anti-explosion property.
Summary of the invention
In view of this, the object of this invention is to provide the double dynamical integrated explosion-proof electrohydraulic control of a kind of valve, adopt modular design, function distribution is reasonable, creates conditions for realizing closed loop control, improves integration degree and explosion-proof performance.
The double dynamical integrated explosion-proof electrohydraulic control of valve of the present invention, comprises electric control box, two-way cylinder and hydraulic drive mechanism; Described two-way cylinder is provided with the displacement transducer for detecting piston displacement; Two-way cylinder drives fore and aft motion by hydraulic drive mechanism;
Further, described hydraulic drive mechanism comprises integrated valve block and is installed on drive motor and the oil pump of integrated valve block; Electric control box comprises casing and is installed on the electric elements in casing; Described casing and integrated valve block are all fixedly installed in the cylinder seat of two-way cylinder, and the signaling line of displacement transducer and drive motor guide line are along cylinder seat internal wiring;
Further, described oil pump is fixed on integrated valve block top, and drive motor is fixed on bottom integrated valve block; Described hydraulic drive mechanism also comprises correspondence, and to cover in oil pump and drive motor outside and be fixed on fuel tank and the motor anti-explosion cover of integrated valve block;
Further, described hydraulic drive mechanism also comprises rotation flame proof sleeve, oil sealing, liquid level plug, flow matching module, safety valve module and valve group protecting cover, oil pump arranges two altogether, one is accelerating pump, another is pump of exerting oneself, accelerating pump is responsible for providing speed, pump of exerting oneself is responsible for providing power, drive motor also arranges two and drives two oil pumps to form the power hydraulic system of a set of collaborative work one to one, the output shaft of drive motor is in transmission connection in the input shaft of corresponding oil pump by corresponding oil pump shaft, oil pump shaft passes vertically through integrated valve block, rotate esplosion isolating cover jacket casing outside and be fixed on integrated valve block in oil pump shaft, oil sealing is located between oil pump shaft and integrated valve block for fuel tank inner chamber and motor anti-explosion cover inner chamber being isolated, described liquid level plug is fixed on top of oil-tank, described flow matching module and safety valve module are fixed on integrated valve block side, valve group protecting cover covers in flow matching module and safety valve module-external and is fixed on integrated valve block,
Further, described two-way cylinder is also provided with the pressure transducer for testing cavity pressure; Described pressure transducer and displacement transducer are all fixed on the cylinder seat of two-way cylinder; Cylinder seat is fixed with the anti-explosion cover covering in pressure transducer and displacement transducer outside;
Further, the cylinder seat inside of described two-way cylinder is provided with the routing hole for arranging pressure sensor signal line, displacement transducer signal line and drive motor guide line;
Further, the routing hole in described cylinder seat and casing and integrated valve block joint are all fixed with flame proof sleeve;
Further, described hydraulic drive mechanism also comprise be installed on integrated valve block for the diverter switch providing the hand pump of high-voltage oil liquid for two-way cylinder and switch between manual drives mode and motorized motions mode;
Further, described casing is provided with openable case lid, the electric elements in casing comprise for receive two-way cylinder displacement signal, two-way cylinder active chamber internal pressure signal, drive motor tach signal controller, be connected to the OLED man-machine display device of controller signals output terminal and be connected to the operation panel of controller signals input end;
Further, described integrated valve block is fixed with hanger.
The invention has the beneficial effects as follows: the double dynamical integrated explosion-proof electrohydraulic control of valve of the present invention, oil cylinder carries displacement detecting, creates conditions for realizing closed loop control, adopts modular design, and function distribution is reasonable, improves integration degree and explosion-proof performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is axonometric drawing of the present invention;
Fig. 5 is hydraulic drive mechanism structural representation;
Fig. 6 is the plan view of Fig. 5.
Embodiment
Fig. 1 is structural representation of the present invention; Fig. 2 is the A-A sectional view of Fig. 1; Fig. 3 is the B-B sectional view of Fig. 1; Fig. 4 is axonometric drawing of the present invention, and Fig. 5 is hydraulic drive mechanism structural representation; Fig. 6 is the plan view of Fig. 5, as shown in the figure: the double dynamical integrated explosion-proof electrohydraulic control of valve of the present embodiment, comprises electric control box 1, two-way cylinder 2 and hydraulic drive mechanism 3; Described two-way cylinder 2 is provided with the displacement transducer 4 for detecting piston displacement; Two-way cylinder 2 drives fore and aft motion by hydraulic drive mechanism 3, be made up of the large module assembled of electric control box 1, two-way cylinder 2 and hydraulic drive mechanism 3 three, adopt modular design, function distribution is reasonable, oil cylinder carries displacement detecting, creating conditions for realizing closed loop control, improving integration degree and explosion-proof performance.
In the present embodiment, described hydraulic drive mechanism 3 comprises integrated valve block 5 and is installed on drive motor and the oil pump of integrated valve block 5; The electric elements 7 that electric control box 1 comprises casing 6 and is installed in casing 6; Described casing 6 and integrated valve block 5 are all fixedly installed in the cylinder seat 8 of two-way cylinder 2, the signaling line of displacement transducer 4 and drive motor guide line are along cylinder seat 8 internal wiring, adopt modular design, function distribution is reasonable, be convenient to assembling, integration degree is high, built-in cabling, without exposing elastic cable paper, system explosion-proof performance is good.
In the present embodiment, described oil pump is fixed on integrated valve block 5 top, and drive motor is fixed on bottom integrated valve block 5, described hydraulic drive mechanism 3 also comprises correspondence, and to cover in oil pump and drive motor outside and be fixed on fuel tank 9 and the motor anti-explosion cover 10 of integrated valve block 5, oil pump arranges two altogether, one is accelerating pump, another is pump of exerting oneself, drive motor also arranges two and drives two oil pumps to form the power hydraulic system of a set of collaborative work one to one, receive the speed control signal of electric control box 1, during rapid movement, for the large discharge supply that cylinder part provides, at positioning stage, there is provided small flow to supply and ensure accurate location, fuel tank 9 is set and motor anti-explosion cover 10 makes hydraulic power supply totally-enclosed, explosion-proof is good.
In the present embodiment, described hydraulic drive mechanism also comprises rotation flame proof sleeve 18, oil sealing 19, liquid level plug 20, flow matching module 21, safety valve module 22 and valve group protecting cover 23, oil pump arranges two altogether, one is accelerating pump 24, another is pump 25 of exerting oneself, accelerating pump is responsible for providing speed, pump of exerting oneself is responsible for providing power, drive motor also arranges two and drives two oil pumps to form the power hydraulic system of a set of collaborative work one to one, the output shaft of drive motor is in transmission connection in the input shaft of corresponding oil pump by corresponding oil pump shaft 26, oil pump shaft 26 passes vertically through integrated valve block 5, rotate flame proof sleeve 18 be placed on oil pump shaft 26 outside and be fixed on integrated valve block 5, oil sealing 19 is located between oil pump shaft 26 and integrated valve block 5 for fuel tank 9 inner chamber and motor anti-explosion cover 10 inner chamber being isolated, described liquid level plug 20 is fixed on fuel tank 9 top, described flow matching module 21 and safety valve module 22 are fixed on integrated valve block 5 side, it is outside and be fixed on integrated valve block 5 that valve group protecting cover 23 covers in flow matching module 21 and safety valve module 22, drive the motor of pump 25 work of exerting oneself for going out force motor 27, drive the motor of accelerating pump 24 work for adding speed motor 28, double dynamical unit collaborative work, realizes quick and pinpoint perfect adaptation, motor is positioned at anti-explosion cover inside, and motor cable is connected with electric control box by cable flame proof passage 29, and fuel tank 9 is positioned at upside, and rotate the flame proof requirement that flame proof sleeve 18 ensure that electric chamber, multi-layer sealed measure ensure that the sealing of fuel tank 9, fuel tank 9 belongs to total closed type fuel tank, and system pressure autobalance designs, and is not communicated with, ensure that fluid Long-Time Service is not oxidized, improve the working life of hydraulic oil, Maintenance free with air, it is inner that flow matching module 21 is positioned at valve group chamber, seal completely, its effect is: the uniformity coordinating double dynamical module two strands of power, controls the actions such as oil cylinder accelerates, deceleration, accurately location, commutation, can autobalance internal leakage, also there is the reverse self-locking function of one-way valve, safety valve module 22 also valve group chamber is inner, and its effect is: regulating system maximum pressure, realizes maximum pressure protection, prevents motor overload, hand pump 15 function: when system dead electricity or inconvenient electric operating, manual hand manipulation, controls oil cylinder reciprocating motion, pressure oil port A30 and pressure oil port B31 are connected with two chambeies of oil cylinder respectively, control oil cylinder respectively and stretch out and return action, multi-layer sealing structure, ensure that good sealing, the integrated valve block 5 of cube structure layout is the erection support that the passage that flows through of fluid is also all elements, and hand pump is positioned at leading flank, and valve group is positioned at side, two motors are positioned at downside, fuel tank 9 is positioned at top, and oil circuit and circuit path are positioned at left side, and cleaning and jettison gear are positioned at right side.
In the present embodiment, described two-way cylinder 2 is also provided with the pressure transducer 11 for testing cavity pressure; Described pressure transducer 11 and displacement transducer 4 are all fixed on the cylinder seat 8 of two-way cylinder 2; Cylinder seat 8 is fixed with the anti-explosion cover 12 covering in pressure transducer 11 and displacement transducer 4 outside, oil cylinder carries displacement and Pressure testing, and level of integration is high, for closed loop control creates conditions, improves explosion-proof performance.
In the present embodiment, cylinder seat 8 inside of described two-way cylinder 2 is provided with the routing hole 13 for arranging pressure transducer 11 signaling line, displacement transducer 4 signaling line and drive motor guide line, built-in cabling, and without exposing elastic cable paper, system explosion-proof performance is good.
In the present embodiment, routing hole 13 in described cylinder seat 8 is all fixed with flame proof sleeve 14 with casing 6 and integrated valve block 5 joint, and cylinder seat 8 is equipped with to the interface of casing 6 and integrated valve block 5 the hydropneumatic O shape rubber seal being surrounded on corresponding flame proof sleeve 14 outside; Further raising explosion-proof performance.
In the present embodiment, described hydraulic drive mechanism 3 also comprise be installed on integrated valve block 5 for the diverter switch 16 providing the hand pump 15 of high-voltage oil liquid for two-way cylinder 2 and switch between manual drives mode and motorized motions mode; When there is no external power supply, the object controlling final controlling element action manually can be realized.
In the present embodiment, described casing 6 is provided with openable case lid, electric elements 7 in casing 6 comprise for receive two-way cylinder 2 displacement signal, two-way cylinder 2 active chamber internal pressure signal, drive motor tach signal controller, be connected to the OLED man-machine display device of controller signals output terminal and be connected to the operation panel of controller signals input end, electric elements 7 also comprises the upper machine communication devices such as wireless, bluetooth, infrared, bus.
In the present embodiment, described integrated valve block 5 is fixed with hanger 17, can lifts hydraulic drive mechanism 3, be convenient to assembling and use.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. the double dynamical integrated explosion-proof electrohydraulic control of valve, is characterized in that: comprise electric control box, two-way cylinder and hydraulic pressure and determine power unit; Described two-way cylinder is provided with the displacement transducer for detecting piston displacement; Two-way cylinder drives fore and aft motion by hydraulic drive mechanism.
2. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 1, is characterized in that: described hydraulic power unit comprises integrated valve block and is installed on drive motor and the oil pump of integrated valve block; Electric control box comprises casing and is installed on the electric elements in casing; Described casing and integrated valve block are all fixedly installed in the cylinder seat of two-way cylinder, and the signaling line of displacement transducer and drive motor guide line are along cylinder seat internal wiring.
3. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 2, it is characterized in that: described oil pump is fixed on integrated valve block top, drive motor is fixed on bottom integrated valve block; Described hydraulic drive mechanism also comprises correspondence, and to cover in oil pump and drive motor outside and be fixed on fuel tank and the motor anti-explosion cover of integrated valve block.
4. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 3, is characterized in that: described hydraulic drive mechanism also comprises rotation flame proof sleeve, oil sealing, liquid level plug, flow matching module, safety valve module and valve group protecting cover, oil pump arranges two altogether, one is accelerating pump, another is pump of exerting oneself, accelerating pump is responsible for providing speed, pump of exerting oneself is responsible for providing power, drive motor also arranges two and drives two oil pumps to form the power hydraulic system of a set of collaborative work one to one, the output shaft of drive motor is in transmission connection in the input shaft of corresponding oil pump by corresponding oil pump shaft, oil pump shaft passes vertically through integrated valve block, rotate esplosion isolating cover jacket casing outside and be fixed on integrated valve block in oil pump shaft, oil sealing is located between oil pump shaft and integrated valve block for fuel tank inner chamber and motor anti-explosion cover inner chamber being isolated, described liquid level plug is fixed on top of oil-tank, described flow matching module and safety valve module are fixed on integrated valve block side, valve group protecting cover covers in flow matching module and safety valve module-external and is fixed on integrated valve block.
5. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 3, is characterized in that: described two-way cylinder is also provided with the pressure transducer for testing cavity pressure; Described pressure transducer and displacement transducer are all fixed on the cylinder seat of two-way cylinder; Cylinder seat is fixed with the anti-explosion cover covering in pressure transducer and displacement transducer outside.
6. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 5, is characterized in that: the cylinder seat inside of described two-way cylinder is provided with the routing hole for arranging pressure sensor signal line, displacement transducer signal line and drive motor guide line.
7. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 6, is characterized in that: the routing hole in described cylinder seat and casing and integrated valve block joint are all fixed with flame proof sleeve.
8. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 7, is characterized in that: described hydraulic drive mechanism also comprise be installed on integrated valve block for the diverter switch providing the hand pump of high-voltage oil liquid for two-way cylinder and switch between manual drives mode and motorized motions mode.
9. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 8, it is characterized in that: described casing is provided with openable case lid, the electric elements in casing comprise for receive two-way cylinder displacement signal, two-way cylinder active chamber internal pressure signal, drive motor tach signal controller, be connected to the OLED man-machine display device of controller signals output terminal and be connected to the operation panel of controller signals input end.
10. the double dynamical integrated explosion-proof electrohydraulic control of valve according to claim 9, is characterized in that: described integrated valve block is fixed with hanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018031.4A CN104565506B (en) | 2015-01-14 | 2015-01-14 | Valve is with double dynamical integrated explosion-proof electrohydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018031.4A CN104565506B (en) | 2015-01-14 | 2015-01-14 | Valve is with double dynamical integrated explosion-proof electrohydraulic actuator |
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| Publication Number | Publication Date |
|---|---|
| CN104565506A true CN104565506A (en) | 2015-04-29 |
| CN104565506B CN104565506B (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510018031.4A Active CN104565506B (en) | 2015-01-14 | 2015-01-14 | Valve is with double dynamical integrated explosion-proof electrohydraulic actuator |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218404A (en) * | 2017-05-16 | 2017-09-29 | 凯迈（洛阳）气源有限公司 | Pile-up valve and the gas cylinder using the pile-up valve |
| CN107269864A (en) * | 2017-07-10 | 2017-10-20 | 太原理工大学 | A kind of gate valve and gate valve control method |
| CN108916455A (en) * | 2018-09-25 | 2018-11-30 | 无锡市经登自控阀门有限公司 | Electro-hydraulic linkage actuator with two screen interchange structures |
| CN109595219A (en) * | 2019-02-01 | 2019-04-09 | 上海置道液压控制技术有限公司 | The servo actuator of air inlet guide vane in a kind of gas turbine |
| CN110475999A (en) * | 2017-06-30 | 2019-11-19 | 株式会社富士金 | Fluid drives valve |
| CN110737684A (en) * | 2019-04-22 | 2020-01-31 | 北京瀚方伟业工程技术有限公司 | Information processing device for assembled electromechanical pipeline layout detection |
| US10711907B2 (en) | 2017-11-07 | 2020-07-14 | Black Diamond Engineering, Inc. | Line replaceable control valve positioner/controller system |
| CN112392798A (en) * | 2020-11-17 | 2021-02-23 | 浙江大学 | One-way load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112412926A (en) * | 2020-11-17 | 2021-02-26 | 浙江大学 | Bidirectional load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112963560A (en) * | 2021-04-16 | 2021-06-15 | 江苏理工学院 | Electro-hydraulic drive gas gate valve with stress detection function and control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218404A (en) * | 2017-05-16 | 2017-09-29 | 凯迈（洛阳）气源有限公司 | Pile-up valve and the gas cylinder using the pile-up valve |
| CN110475999B (en) * | 2017-06-30 | 2021-04-06 | 株式会社富士金 | Fluid actuated valve |
| CN110475999A (en) * | 2017-06-30 | 2019-11-19 | 株式会社富士金 | Fluid drives valve |
| CN107269864A (en) * | 2017-07-10 | 2017-10-20 | 太原理工大学 | A kind of gate valve and gate valve control method |
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| CN107269864B (en) * | 2017-07-10 | 2021-07-02 | 太原理工大学 | Gate valve and gate valve control method |
| US10711907B2 (en) | 2017-11-07 | 2020-07-14 | Black Diamond Engineering, Inc. | Line replaceable control valve positioner/controller system |
| CN108916455A (en) * | 2018-09-25 | 2018-11-30 | 无锡市经登自控阀门有限公司 | Electro-hydraulic linkage actuator with two screen interchange structures |
| CN108916455B (en) * | 2018-09-25 | 2024-04-12 | 无锡市经登自控阀门有限公司 | Electrohydraulic linkage actuator with two-screen interchange structure |
| CN109595219A (en) * | 2019-02-01 | 2019-04-09 | 上海置道液压控制技术有限公司 | The servo actuator of air inlet guide vane in a kind of gas turbine |
| CN110737684B (en) * | 2019-04-22 | 2022-03-18 | 北京瀚方伟业工程技术有限公司 | Information processing device for layout detection of assembled electromechanical pipelines |
| CN110737684A (en) * | 2019-04-22 | 2020-01-31 | 北京瀚方伟业工程技术有限公司 | Information processing device for assembled electromechanical pipeline layout detection |
| CN112412926A (en) * | 2020-11-17 | 2021-02-26 | 浙江大学 | Bidirectional load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112392798A (en) * | 2020-11-17 | 2021-02-23 | 浙江大学 | One-way load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112392798B (en) * | 2020-11-17 | 2021-10-19 | 浙江大学 | One-way load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112412926B (en) * | 2020-11-17 | 2021-10-19 | 浙江大学 | Bidirectional load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112963560A (en) * | 2021-04-16 | 2021-06-15 | 江苏理工学院 | Electro-hydraulic drive gas gate valve with stress detection function and control system |
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