CN101598232A - The control valve electro-hydraulic driver - Google Patents
The control valve electro-hydraulic driver Download PDFInfo
- Publication number
- CN101598232A CN101598232A CNA2009100173086A CN200910017308A CN101598232A CN 101598232 A CN101598232 A CN 101598232A CN A2009100173086 A CNA2009100173086 A CN A2009100173086A CN 200910017308 A CN200910017308 A CN 200910017308A CN 101598232 A CN101598232 A CN 101598232A
- Authority
- CN
- China
- Prior art keywords
- control valve
- valve
- control
- transducer
- drive cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a kind of control valve electro-hydraulic driver, comprise hydraulic driving system, pressure transducer, flow transducer, position transducer and control unit, hydraulic driving system is used for the spool of drive control valve, comprises two-way function drive cylinder, position control valve, three position four-way directional control valve, accumulator, actuating motor and double-direction gearpump; Pressure transducer and flow transducer are installed on the pipeline of fluid output, are used for the pressure and the flow of signal piping output fluid, all are connected with control unit; Position transducer is used to detect the valve element position of the control valve that will control, is connected with control unit.The present invention has realized that hydraulic oil directly enters oil suction chamber from going out the oil pocket outflow, the centre does not need through fuel tank, simple and compact for structure, motor and oil pump do not need continuous running, and discontinuous operation is in energy-conservation, can also prolong the life-span of system, realize ultra-long time stable operation, also can realize the quick response of control valve, the reliability height.
Description
Technical field
The present invention relates to a kind of controlling device of big flow hydrodynamic pressure control, belong to the control valve technical field.
Background technique
The gas turbine generator group that steel mill's circulating generation engineering adopts requires the gas pressure of input stable.Because technology, safety and cost, the voltage stabilizing of coal gas all adopt pneumatic pressure-regulating valve to realize at present.The gas pressure fluctuation is big, can cause serious surge.For preventing surge, pneumatic pressure-regulating valve must be able to respond fast, opens or closes fast.Coke oven and the blast furnace mixed gas delivery volume of importing every gas turbine are bigger, per hour can reach tens thousand of cubic meters.Under so big flow, realize that by common large-scale pneumatic pressure regulator valve pressure stability, the quick response of realization are very difficult, main cause is because dynamic response is slow, hysteresis.Pressure transient is major reason and the hidden danger that causes power generating equipment to be shut down.
Tradition large-scale pressure regulator valve low-response and response lag can not adapt to the pressure stability of gas of high flow rate in the circulating generation engineering.The modulating valve response time depends primarily on actuator.Actuator commonly used has pneumatic and electric actuator.Pneumatic actuator adopts pressurized air or the nitrogen source that is used as power, and yaw stiffness is poor, is unsuitable for response and big actuator fast.Electric actuator is made up of motor, reduction gear box, control box etc., because motor will be through slowing down actuator's speed even also lower than pneumatic actuator.When realizing big thrust, electric actuator is bulky, and the structure of its sealing can produce heat, the Security reduction.The dynamic characteristic and the dynamic response time of actuator's properties influence whole system.The pressure regulator valve response lag then depends primarily on the hysteresis characteristic of system, i.e. the influence in dead band, and friction is one of principal element that influences in the dead band.Common hydraulic driving system is a complex appts that has a bigger fuel tank normally, and motor and oil pump need continuous running, are unfavorable for energy saving.
Summary of the invention
The present invention is directed to problems such as the dynamic response time that has large-scale pressure regulator valve existence now is slow, response lag, the control valve electro-hydraulic driver that a kind of dynamic response time is fast, can eliminate response lag is provided, make it be applicable to the pressure control of big flow fluid.
Control valve electro-hydraulic driver of the present invention comprises hydraulic driving system, pressure transducer, flow transducer, position transducer and control unit:
Hydraulic driving system: the spool that is used for drive control valve, comprise two-way function drive cylinder, position control valve, three position four-way directional control valve, accumulator, actuating motor and double-direction gearpump, double-direction gearpump is connected with actuating motor, actuating motor is connected with control unit, the filler opening of double-direction gearpump is connected with accumulator by one-way valve respectively on the one hand with oil outlet, and accumulator is connected with the two-way function drive cylinder by three position four-way directional control valve again; The filler opening of double-direction gearpump directly is connected with the two-way function drive cylinder by position control valve with oil outlet on the other hand, and the two-way function drive cylinder is installed on the control valve that needs control, and the piston in the two-way function drive cylinder is connected with the spool of control valve; Hydraulic oil directly enters oil suction chamber from going out the oil pocket outflow, and the centre does not need through fuel tank.
Pressure transducer and flow transducer: be installed on the pipeline of fluid output, be used for the pressure and the flow of signal piping output fluid, all be connected with control unit;
Position transducer: be installed in two-way function drive cylinder top, be used to detect the valve element position of the control valve that will control, be connected with control unit.
Described position control valve comprises valve body, piston and taper pin, piston is installed in the endoporus of valve body, respectively be provided with one group of oil inlet and outlet in the both sides of piston on the valve body, be equipped with the taper pin that control port communicates between every group of oil inlet and outlet, be provided with spring between taper pin and the valve interior wall.
Above-mentioned control valve electro-hydraulic driver is set the pressure of pipeline operation and flow etc. by control unit (adopt PLC).When the control valve delivery pressure, when flow increases, the pressure flow sensor feeds back to control unit with the variable signal output of pressure, flow, and the control actuating motor starts double-direction gearpump, the piston that promotes the two-way function drive cylinder moves, and turns the opening degree of control valve down.When the control valve delivery pressure, when flow reduces, the pressure flow sensor feeds back to control unit with the variable signal output of pressure, flow, and the control actuating motor starts double-direction gearpump, the piston that promotes the two-way function drive cylinder moves, and transfers the opening degree of big control valve.Detect the valve element position of the control valve that will control by position transducer.
The present invention drives by electric liquid, and traditional relatively pneumatic actuator and electric actuator have that stroke is big, thrust or characteristics such as moment is big, the response time is fast, highly sensitive, mechanism's compactness.By the automatic controlled hydraulic system of control unit, can bring into play the advantage that electronic control response speed is fast, the hydraulic pressure ouput force is big like this, also can realize the quick response of control valve, improve the reliability of control valve.This control valve electro-hydraulic driver can realize that hydraulic oil directly enters oil suction chamber from going out the oil pocket outflow, and the centre does not need through fuel tank, only needs less fuel tank.The whole control valve electro-hydraulic driver element is few, simple and compact for structure, and cost is low.The motor of hydraulic driving system and oil pump do not need continuous running, and discontinuous operation in energy-conservation, can also prolong the life-span of system, realize ultra-long time stable operation, have high reliability.The present invention is specially adapted to the adjusting control of gas pressure in steel mill's circulating generation engineering, also can be suitable for the adjusting of fluids such as thermal power generation, nuclear power, chemical industry.
Description of drawings
Fig. 1 is a structural principle schematic representation of the present invention.
Fig. 2 is a control principle schematic representation of the present invention.
Fig. 3 is the structural representation of position control valve among the present invention.
Wherein: 1, two-way function drive cylinder, 2, position control valve, 3, three position four-way directional control valve, 4, accumulator, 5, fuel tank, 6, actuating motor, 7, double-direction gearpump, 9, one-way valve, 10, one-way valve, 11, upper piston rod, 12, hydraulic fluid port, 13, lower piston rod, 14, piston, 15, hydraulic fluid port, 16, support, 17, valve body, 18, spool, 19, spring, 20, cover, 21, piston, 22, taper pin, 23, spring, 24, the position control valve body, 25, taper pin.
Embodiment
Control valve electro-hydraulic driver of the present invention comprises hydraulic driving system, pressure transducer, flow transducer, position transducer and control unit, and hydraulic driving part, pressure transducer, flow transducer and position transducer all are connected (referring to Fig. 2) with control unit.
As shown in Figure 1, hydraulic driving system mainly comprises two-way function drive cylinder 1, position control valve 2, three position four-way directional control valve 3, accumulator 4, actuating motor 6 and double-direction gearpump 7, double-direction gearpump 7 is connected with actuating motor 6, by actuating motor 6 control runnings, actuating motor 6 is connected with control unit (PLC).The filler opening of double-direction gearpump 7 is connected with accumulator 4 with one-way valve 10 by one-way valve 9 respectively on the one hand with oil outlet, and accumulator 4 is connected with two-way function drive cylinder 1 by three position four-way directional control valve 3 again; The filler opening of double-direction gearpump 7 directly is connected with two-way function drive cylinder 1 by position control valve 2 with oil outlet on the other hand.Two-way function drive cylinder 1 is fixedly mounted on by support 16 on the valve body 17 of the control valve that needs control, and the piston 14 in the two-way function drive cylinder 1 is connected with the spool 18 of control valve by lower piston rod 13.Accumulator 4 can be fixedly mounted on the housing of two-way function drive cylinder 1.
Actuating motor 6 drives double-direction gearpump 7 and rotates, by fuel tank 5 oil suctions, when double-direction gearpump 7 from left to right during fuel feeding, hydraulic oil passes through one-way valve 9 on the one hand to accumulator 4 fuel feeding, and the hydraulic fluid port A by position control valve 2 enters on the one hand, exports from hydraulic fluid port B, enter the upper chamber of two-way function drive cylinder 1 by hydraulic fluid port 12 through oil pipe, the piston 14 that promotes two-way function drive cylinder 1 is descending, and it is descending that the lower piston rod 13 that is connected piston 14 lower ends promotes the spool 18 of control valves, reduces the valve openings degree.When double-direction gearpump 7 right-to-left fuel feeding, hydraulic oil passes through one-way valve 10 on the one hand to accumulator 4 fuel feeding, hydraulic fluid port C by position control valve 2 enters on the one hand, export from hydraulic fluid port D, enter the lower cavity of two-way function drive cylinder 1 by hydraulic fluid port 15 through oil pipe, the piston 14 that promotes two-way function drive cylinder 1 is up, and the spool 18 of lower piston rod 13 drive control valves is up, increases the valve openings degree.Above two-way function drive cylinder 1, be provided with position transducer, piston 14 upper ends of two-way function drive cylinder 1 are connected with upper piston rod 11, when piston 14 moves up and down, this position transducer detects the displacement distance of upper piston rod 11, and testing result fed back to control unit, this is apart from the opening degree that has reacted control valve, and control unit is according to the working order of feedback signal decision actuating motor 6.
Also can be by accumulator 4 to two-way function drive cylinder 1 fuel feeding, when three position four-way directional control valve 3 was in meta, accumulator 4 was the energy storage state.When three position four-way directional control valve 3 is in right position, accumulator 4 is to the upper chamber fuel feeding of two-way function drive cylinder 1, it is descending fast to promote drive cylinder piston 14, when three position four-way directional control valve 3 is in position, a left side, accumulator 4 promotes drive cylinder piston fast uplink to the lower cavity fuel feeding of two-way function drive cylinder 1.
The structure of position control valve 2 as shown in Figure 3.Comprise valve body 24, piston 21, piston 21 is installed in the endoporus of valve body 24, respectively be provided with one group of oil inlet and outlet in the both sides of piston 21 on the valve body 24, be hydraulic fluid port A and hydraulic fluid port B and hydraulic fluid port C and hydraulic fluid port D, be equipped with the taper pin that control communicates between every group of oil inlet and outlet, i.e. taper pin 22 and taper pin 25, taper pin 25 is installed in the cover 20, be provided with spring 19 in the cover 20, taper pin 22 also is installed in the cover, is provided with spring 23 in this cover.When hydraulic fluid port A oil-feed, promote taper pin 22 pressure springs 23 and move to right, hydraulic fluid port A communicates with hydraulic fluid port B; Promote piston 21 simultaneously and be moved to the left, promote taper pin 25 pressure springs 19 and move to left, hydraulic fluid port C communicates with hydraulic fluid port D.When hydraulic fluid port C oil-feed, promote taper pin 25 pressure springs 19 and move to left, hydraulic fluid port C communicates with hydraulic fluid port D; Promote piston 21 simultaneously and move right, promote taper pin 22 pressure springs 23 and move to right, hydraulic fluid port A communicates with hydraulic fluid port B.
Fig. 2 has provided control principle of the present invention, and control unit adopts programmable controller (PLC).Pressure transducer and flow transducer are installed on the pipeline, are used for the pressure and the flow of signal piping output fluid.Set the pressure of pipeline operation and flow etc. by control unit (PLC), pressure transducer and flow transducer arrive control unit (PLC) with the signal feed back that collects, compare with setting value, according to comparison situation control unit (PLC) control hydraulic driving system the spool aperture of control valve is regulated, with flow and the pressure of stablizing control valve.When the control valve delivery pressure, when flow increases, the pressure flow sensor feeds back to control unit with the variable signal output of pressure, flow, and control actuating motor 6 starts double-direction gearpump 7, the piston 14 that promotes two-way function drive cylinder 1 moves, and turns the opening degree of control valve down.When the control valve delivery pressure, when flow reduces, the pressure flow sensor feeds back to control unit with the variable signal output of pressure, flow, and control actuating motor 6 starts double-direction gearpump 7, the piston 14 that promotes two-way function drive cylinder 1 moves, and transfers the opening degree of big control valve.Above the upper piston rod 11 of two-way function drive cylinder 1, the position transducer that is connected with control unit is installed, detects the valve element position of the control valve that will control by position transducer.In the course of the work, owing to obstruction, wearing and tearing, distortion etc., the working state of control valve can change, and the employing mixing control method makes full use of intelligent control algorithm and use experience is finished intelligent diagnostics.
The present invention adopts Driven by Hydraulic Cylinder control valve spool technology, hydraulic driving system discontinuous operation.When input signal and control valve aperture balance, two-way function drive cylinder 1 quits work, and does not need electric energy to keep this equilibrium position.
The present invention passes through hydraulic driving, and by the automatic controlled hydraulic system of control unit, can bring into play the advantage that electronic control response speed is fast, the hydraulic pressure ouput force is big like this, also can realize the quick response of control valve, improves the reliability of control valve.The hydraulic driving system discontinuous operation in energy-conservation, can also prolong the life-span of system, realizes ultra-long time stable operation, has high reliability.
The present invention also can be provided with tar and stop up intelligent self-diagnosable system, and by detecting pressure, tolerance or the oscillating signal of control valve, whether the diagnosis control valve system exists faults such as tar obstruction, determines reasonably to shut down maintenance opportunity.By detecting pressure, the tolerance of control valve, analyze the state of modulating valve.According to the state of large-scale pressure controlled valve, realize the automatic adjustment of zero point and stroke, optimize response sensitivity, eliminate its influence.
Claims (2)
1. a control valve electro-hydraulic driver comprises hydraulic driving system, pressure transducer, flow transducer, position transducer and control unit, it is characterized in that:
Hydraulic driving system: the spool that is used for drive control valve, comprise two-way function drive cylinder, position control valve, three position four-way directional control valve, accumulator, actuating motor and double-direction gearpump, double-direction gearpump is connected with actuating motor, actuating motor is connected with control unit, the filler opening of double-direction gearpump is connected with accumulator by one-way valve respectively on the one hand with oil outlet, and accumulator is connected with the two-way function drive cylinder by three position four-way directional control valve again; The filler opening of double-direction gearpump directly is connected with the two-way function drive cylinder by position control valve with oil outlet on the other hand, and the two-way function drive cylinder is installed on the control valve that needs control, and the piston in the two-way function drive cylinder is connected with the spool of control valve;
Pressure transducer and flow transducer: be installed on the pipeline of fluid output, be used for the pressure and the flow of signal piping output fluid, all be connected with control unit;
Position transducer: be installed in two-way function drive cylinder top, be used to detect the valve element position of the control valve that will control, be connected with control unit.
2. control valve electro-hydraulic driver according to claim 1, it is characterized in that: described position control valve comprises valve body, piston and taper pin, piston is installed in the endoporus of valve body, respectively be provided with one group of oil inlet and outlet in the both sides of piston on the valve body, be equipped with the taper pin that control port communicates between every group of oil inlet and outlet, be provided with spring between taper pin and the valve interior wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100173086A CN101598232B (en) | 2009-07-20 | 2009-07-20 | Electro-hydraulic driver of control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100173086A CN101598232B (en) | 2009-07-20 | 2009-07-20 | Electro-hydraulic driver of control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101598232A true CN101598232A (en) | 2009-12-09 |
| CN101598232B CN101598232B (en) | 2011-01-26 |
Family
ID=41419777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100173086A Expired - Fee Related CN101598232B (en) | 2009-07-20 | 2009-07-20 | Electro-hydraulic driver of control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101598232B (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811304A (en) * | 2010-04-23 | 2010-08-25 | 山东大学 | Hydraulic drive system of four-foot walking robot |
| CN102466044A (en) * | 2010-11-11 | 2012-05-23 | 瑞克阀门工业(苏州)有限公司 | Steam stop valve and control system thereof |
| CN102501319A (en) * | 2011-11-11 | 2012-06-20 | 中联重科股份有限公司 | Water adding method |
| CN103216665A (en) * | 2012-01-21 | 2013-07-24 | 飞翼股份有限公司 | Hydraulically controlled throttling valve for transporting filling materials |
| CN103216263A (en) * | 2012-01-21 | 2013-07-24 | 飞翼股份有限公司 | Control method for emptying air in underground filling riser by using cut-off valve |
| CN104197074A (en) * | 2014-08-21 | 2014-12-10 | 山东大学 | Integrated type electro-hydraulic drive regulating valve and control method |
| CN104197081A (en) * | 2014-08-21 | 2014-12-10 | 山东大学 | Control valve flexible connection kit |
| CN104405711A (en) * | 2014-11-20 | 2015-03-11 | 沈阳东北电力调节技术有限公司 | Overload electrohydraulic executing mechanism drive valve system with compensation function |
| CN104822475A (en) * | 2012-11-09 | 2015-08-05 | 丹尼尔和科菲森梅克尼齐有限公司 | Stopper control device |
| WO2016026391A1 (en) * | 2014-08-21 | 2016-02-25 | 山东大学 | Integrated electro-hydraulic driven regulating valve and control method |
| RU2614555C2 (en) * | 2011-07-04 | 2017-03-28 | Аума Ристер Гмбх Унд Ко. Кг | Automation technology device |
| CN108626409A (en) * | 2017-03-17 | 2018-10-09 | 双恒阀门集团有限公司 | A kind of emergency isolation valve |
| CN108799604A (en) * | 2018-06-29 | 2018-11-13 | 武汉大学 | A kind of organic glass tablet rapid-closure damper |
| CN110809686A (en) * | 2017-06-30 | 2020-02-18 | Vat控股公司 | Vacuum valve with pressure sensor |
| CN111379874A (en) * | 2020-03-30 | 2020-07-07 | 珠海格力智能装备有限公司 | Pressure regulating system |
| CN111622790A (en) * | 2020-06-11 | 2020-09-04 | 中国矿业大学 | Intelligent and rapid application method for prestress of anchor rod |
| CN111779983A (en) * | 2020-07-09 | 2020-10-16 | 珠海格力智能装备有限公司 | Pressure regulating device and pressure regulating system |
| CN111895132A (en) * | 2019-12-20 | 2020-11-06 | 中国航发长春控制科技有限公司 | High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve |
| CN111911485A (en) * | 2020-08-12 | 2020-11-10 | 中石油西北联合管道有限责任公司 | Hydraulic servo control system, hydraulic servo control method, and readable storage medium |
| CN112128458A (en) * | 2020-08-13 | 2020-12-25 | 西安航天动力研究所 | Spring piston type closed system and switch type electro-hydraulic actuating mechanism driven by energy accumulator |
| CN112879624A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor and servo motor double-control axial flow safety type water hammer relief valve |
| CN113685553A (en) * | 2021-10-27 | 2021-11-23 | 江苏金晟元特种阀门股份有限公司 | Pneumatic cut-off valve for corrugated pipe |
| CN113757394A (en) * | 2020-09-16 | 2021-12-07 | 江苏中浮矿业科技有限公司 | Air intake control device for flotation column |
| CN113770330A (en) * | 2020-06-09 | 2021-12-10 | 株式会社沙迪克 | Backflow prevention device of light metal injection device and backflow prevention method thereof |
| CN114382937A (en) * | 2021-11-29 | 2022-04-22 | 武汉船用机械有限责任公司 | Hydraulic control device of electrohydraulic ball valve |
| CN118602129A (en) * | 2024-08-08 | 2024-09-06 | 浙江永冠阀门有限公司 | Knife gate valve with suction and exhaust function |
-
2009
- 2009-07-20 CN CN2009100173086A patent/CN101598232B/en not_active Expired - Fee Related
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811304A (en) * | 2010-04-23 | 2010-08-25 | 山东大学 | Hydraulic drive system of four-foot walking robot |
| CN102466044A (en) * | 2010-11-11 | 2012-05-23 | 瑞克阀门工业(苏州)有限公司 | Steam stop valve and control system thereof |
| RU2614555C2 (en) * | 2011-07-04 | 2017-03-28 | Аума Ристер Гмбх Унд Ко. Кг | Automation technology device |
| CN102501319A (en) * | 2011-11-11 | 2012-06-20 | 中联重科股份有限公司 | Water adding method |
| CN102501319B (en) * | 2011-11-11 | 2014-11-26 | 中联重科股份有限公司 | Water adding method |
| CN103216263B (en) * | 2012-01-21 | 2016-01-20 | 飞翼股份有限公司 | A kind of control method adopting the emptying underground filling of shutoff valve to found inner air tube |
| CN103216665A (en) * | 2012-01-21 | 2013-07-24 | 飞翼股份有限公司 | Hydraulically controlled throttling valve for transporting filling materials |
| CN103216263A (en) * | 2012-01-21 | 2013-07-24 | 飞翼股份有限公司 | Control method for emptying air in underground filling riser by using cut-off valve |
| CN103216665B (en) * | 2012-01-21 | 2016-01-06 | 飞翼股份有限公司 | A kind of hydraulic control conveying casting resin throttle valve |
| US10024455B2 (en) | 2012-11-09 | 2018-07-17 | Danieli & C. Officine Meccaniche S.P.A. | Stopper control device |
| CN104822475A (en) * | 2012-11-09 | 2015-08-05 | 丹尼尔和科菲森梅克尼齐有限公司 | Stopper control device |
| WO2016026391A1 (en) * | 2014-08-21 | 2016-02-25 | 山东大学 | Integrated electro-hydraulic driven regulating valve and control method |
| CN104197081A (en) * | 2014-08-21 | 2014-12-10 | 山东大学 | Control valve flexible connection kit |
| CN104197074A (en) * | 2014-08-21 | 2014-12-10 | 山东大学 | Integrated type electro-hydraulic drive regulating valve and control method |
| CN104405711A (en) * | 2014-11-20 | 2015-03-11 | 沈阳东北电力调节技术有限公司 | Overload electrohydraulic executing mechanism drive valve system with compensation function |
| CN104405711B (en) * | 2014-11-20 | 2016-08-24 | 沈阳东北电力调节技术有限公司 | The heavily loaded electrohydraulic actuator that band compensates drives valve system |
| CN108626409A (en) * | 2017-03-17 | 2018-10-09 | 双恒阀门集团有限公司 | A kind of emergency isolation valve |
| CN110809686A (en) * | 2017-06-30 | 2020-02-18 | Vat控股公司 | Vacuum valve with pressure sensor |
| US11378202B2 (en) | 2017-06-30 | 2022-07-05 | Vat Holding Ag | Vacuum valve having a pressure sensor |
| CN108799604A (en) * | 2018-06-29 | 2018-11-13 | 武汉大学 | A kind of organic glass tablet rapid-closure damper |
| CN111895132A (en) * | 2019-12-20 | 2020-11-06 | 中国航发长春控制科技有限公司 | High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve |
| CN111379874A (en) * | 2020-03-30 | 2020-07-07 | 珠海格力智能装备有限公司 | Pressure regulating system |
| CN113770330B (en) * | 2020-06-09 | 2023-05-09 | 株式会社沙迪克 | Backflow preventing device of light metal injection device and backflow preventing method thereof |
| CN113770330A (en) * | 2020-06-09 | 2021-12-10 | 株式会社沙迪克 | Backflow prevention device of light metal injection device and backflow prevention method thereof |
| CN111622790B (en) * | 2020-06-11 | 2021-08-03 | 中国矿业大学 | Intelligent and rapid application method for prestress of anchor rod |
| CN111622790A (en) * | 2020-06-11 | 2020-09-04 | 中国矿业大学 | Intelligent and rapid application method for prestress of anchor rod |
| CN111779983A (en) * | 2020-07-09 | 2020-10-16 | 珠海格力智能装备有限公司 | Pressure regulating device and pressure regulating system |
| CN111911485A (en) * | 2020-08-12 | 2020-11-10 | 中石油西北联合管道有限责任公司 | Hydraulic servo control system, hydraulic servo control method, and readable storage medium |
| CN112128458A (en) * | 2020-08-13 | 2020-12-25 | 西安航天动力研究所 | Spring piston type closed system and switch type electro-hydraulic actuating mechanism driven by energy accumulator |
| CN113757394A (en) * | 2020-09-16 | 2021-12-07 | 江苏中浮矿业科技有限公司 | Air intake control device for flotation column |
| CN112879624A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor and servo motor double-control axial flow safety type water hammer relief valve |
| CN112879624B (en) * | 2021-02-09 | 2023-01-17 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor and servo motor double-control axial flow safety type water hammer relief valve |
| CN113685553A (en) * | 2021-10-27 | 2021-11-23 | 江苏金晟元特种阀门股份有限公司 | Pneumatic cut-off valve for corrugated pipe |
| CN113685553B (en) * | 2021-10-27 | 2021-12-31 | 江苏金晟元特种阀门股份有限公司 | Pneumatic cut-off valve for corrugated pipe |
| CN114382937A (en) * | 2021-11-29 | 2022-04-22 | 武汉船用机械有限责任公司 | Hydraulic control device of electrohydraulic ball valve |
| CN114382937B (en) * | 2021-11-29 | 2024-05-28 | 武汉船用机械有限责任公司 | Hydraulic control device of electrohydraulic ball valve |
| CN118602129A (en) * | 2024-08-08 | 2024-09-06 | 浙江永冠阀门有限公司 | Knife gate valve with suction and exhaust function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101598232B (en) | 2011-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101598232B (en) | Electro-hydraulic driver of control valve | |
| CN101603527B (en) | Emulsion pump testing system | |
| CN102777434A (en) | Hydraulic driving apparatus for working machine | |
| CN101852220A (en) | Controllable high-pressure high-flow generating device and control method thereof | |
| CN108383039B (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN102588359A (en) | Hydraulic system, excavator and control method of hydraulic system | |
| CN102996537B (en) | Power swivel stepless speed regulation hydraulic system | |
| CN104613025B (en) | A kind of hydraulic system and the method for hydraulic actuator back pressure stroke energy regenerating | |
| CN102788056A (en) | Hydraulic control system of electro-hydraulic feedback proportion throttle cartridge valve | |
| CN105437396A (en) | Pump-control ram piston hydraulic pressure system of mixer | |
| CN202789805U (en) | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve | |
| CN105179314A (en) | Novel adjusting system for stationary blades of axial flow fan | |
| CN203114764U (en) | Load-sensitive electro-hydraulic proportional multi-way valve | |
| CN203612864U (en) | Hydraulic winch constant-tension control device | |
| CN201620919U (en) | Split type self-contained electro-hydraulic actuator | |
| CN201620891U (en) | Variable frequency closed type hydraulic traction system of shearer | |
| CN100507330C (en) | High volume gas pressure regulating valve | |
| CN103030064A (en) | Control system and control method of engineering mechanical equipment | |
| CN103771305A (en) | Hydraulically-controlled proportional speed-adjusting energy-saving control system for overhead working automobile and control method thereof | |
| CN109185242A (en) | A kind of large size reel sprinkling irrigation machine fluid pressure drive device | |
| CN102221024A (en) | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system | |
| CN201650894U (en) | Controllable high pressure and large flow generating device | |
| US8517040B2 (en) | Valve control of pump inlet pressure with bootstrap reservoir | |
| CN204403003U (en) | A kind of hydraulic system | |
| CN202251169U (en) | Single-power hydraulic station for mine cableway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091209 Assignee: Yangzhou Hengchun Electronic Co., Ltd. Assignor: Shandong University Contract record no.: 2016320000033 Denomination of invention: Electro-hydraulic driver of control valve Granted publication date: 20110126 License type: Exclusive License Record date: 20160224 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20180720 |