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WO2020037761A1 - Electrohydraulic actuator preventing fire damage from expanding - Google Patents

Electrohydraulic actuator preventing fire damage from expanding Download PDF

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Publication number
WO2020037761A1
WO2020037761A1 PCT/CN2018/107251 CN2018107251W WO2020037761A1 WO 2020037761 A1 WO2020037761 A1 WO 2020037761A1 CN 2018107251 W CN2018107251 W CN 2018107251W WO 2020037761 A1 WO2020037761 A1 WO 2020037761A1
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WIPO (PCT)
Prior art keywords
valve
cylinder
oil
reversing valve
fusible plug
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.)
Ceased
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PCT/CN2018/107251
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French (fr)
Chinese (zh)
Inventor
刘宝军
郑学明
孙贤双
刘观华
张弢
张涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Northeast Electric Power Control Co Ltd
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Shenyang Northeast Electric Power Control Co Ltd
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Publication date
Application filed by Shenyang Northeast Electric Power Control Co Ltd filed Critical Shenyang Northeast Electric Power Control Co Ltd
Publication of WO2020037761A1 publication Critical patent/WO2020037761A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
    • 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
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack

Definitions

  • the invention relates to an electro-hydraulic actuator, in particular to an electro-hydraulic actuator that drives and controls a pipeline valve.
  • Valves are installed in the pipelines of refineries, petroleum reserves and other flammable and explosive occasions.
  • electro-hydraulic actuators that drive and control pipeline valves include rotary oil cylinders, oil tanks, hydraulic accumulators (hereinafter referred to as accumulators) and their oil pipes.
  • the rotary oil cylinders include two oil cylinders, A and B.
  • the left solenoid of the solenoid valve is charged, and the high-pressure oil of the accumulator enters the cylinder A port of the rotary cylinder through the corresponding outlet of the solenoid valve, and the return oil of the B cylinder passes the corresponding inlet of the solenoid valve.
  • the return oil of the B cylinder passes the corresponding inlet of the solenoid valve.
  • the normal state of the pipeline valve in the above situation is that the valve is opened or closed and maintained in position, so the normal state of the electro-hydraulic actuator is that the electromagnetic directional valve is in a neutral state. If it is necessary to change the normal state of the valve, such as closing the valve, electric power is needed to excite the solenoid of the electromagnetic reversing valve, so that the electro-hydraulic actuator can work.
  • the valve When a fire or other dangerous accident occurs in the above flammable and explosive places and its equipment, if the valve can be closed and the medium can be blocked in the first time, the expansion of the fire accident can be avoided, and losses can be reduced.
  • the general operation is to first cut off the power supply and interrupt the power supply. At this time, the electromagnetic reversing valve is in the neutral state, that is, the electro-hydraulic actuator cannot work, the valve cannot be closed, and the loss of the fire cannot be avoided.
  • an object of the present invention is to provide an electro-hydraulic actuator that prevents the expansion of fire damage.
  • the purpose of the present invention is achieved by setting that the rotary oil cylinder drives the valve to close, and the moving direction of the rack is that the rack moves from the A cylinder to the B cylinder.
  • the invention includes an electromagnetic directional valve, an accumulator and its oil pipe, an oil tank and its oil return pipeline, which are characterized in that one end of a fusible plug pipeline (a fusible plug pipeline refers to a pipeline provided with a fusible plug) and The control chamber of the hydraulic reversing valve is connected to the accumulator oil pipe. The other end of the fusible plug pipe is connected to the oil return pipe of the fuel tank.
  • the hydraulic reversing valve and the electromagnetic reversing valve are connected in parallel, that is, two The A, B, P and T ports of each valve are connected together.
  • the present invention maintains normal operation as described in paragraph 0002 at normal temperature, and is generally in a normal state, that is, the electromagnetic directional valve is in a neutral state.
  • the fusible plug is melted, the fusible plug pipe is opened, and the liquid
  • the high-pressure oil in the control chamber of the moving reversing valve flows back to the oil tank through the fusible plug pipe, that is, the high-pressure oil in the control chamber of the fusible plug pipe is leaked.
  • the hydraulic reversing valve is opened to change the direction of the accumulator.
  • the high-pressure oil is changed through the hydraulic reversing valve and enters the oil port of cylinder A.
  • the non-pressure oil in the oil cylinder B is sequentially changed through its port and the hydraulic reversing valve and flows back to the fuel tank to drive the rack from the oil cylinder A to the oil cylinder B.
  • the gear rotates clockwise to drive the valve closed.
  • the present invention has the positive effect of completing the closing operation of the valve at the first time in a fire, closing the valve in time, and preventing the expansion of the fire loss.
  • FIG. 1 is a schematic diagram of the present invention.
  • the rotary oil cylinder 1 is set to drive the valve to close, and the rack moves in the direction that the rack moves from the A cylinder to the B cylinder.
  • the invention includes a rotary oil cylinder, an oil tank 4 and its oil return pipeline 41, an accumulator 10 and its oil pipe 101.
  • the rotary oil cylinder includes two oil cylinders A and B, one end of a fusible plug pipeline 3, and the control of the hydraulic directional valve 2.
  • the cavity 21 is connected to the accumulator oil pipe 101, and the other end of the fusible plug pipe is connected to the oil return pipe 41 of the fuel tank.
  • the hydraulic reversing valve and the electromagnetic reversing valve 9 are connected in parallel, that is, two The A, B, P and T ports of the valve are connected together.
  • the one-way throttle valve 8 regulates the movement speed of the actuator, 7 is a pressure switch, and 6 is a throttle valve.
  • the present invention works normally at normal temperature.
  • the oil pump 5 fills the accumulator with oil. When the pressure of the accumulator reaches a set pressure value, the oil pump stops working.
  • the left solenoid of the electromagnetic reversing valve 9 is charged, and the high-pressure oil of the accumulator enters the A cylinder port of the rotary cylinder through the corresponding outlet of the electromagnetic reversing valve, and the return oil of the B cylinder passes the corresponding electromagnetic reversing valve.
  • the inlet flows back to the fuel tank, drives the rack 11 from the A cylinder to the B cylinder, drives the gear 12 to rotate clockwise, and drives the valve to close; when the valve is required to be closed to open, the electromagnetic reversing valve is reversed, and the high-pressure oil of the accumulator passes
  • the outlet of the electromagnetic reversing valve after reversing enters cylinder B, and the return oil of cylinder A flows back to the tank through the reversing inlet of the electromagnetic reversing valve, driving the rack from cylinder B to cylinder A, driving the gear to rotate counterclockwise, driving
  • the valve is closed to open; if the valve needs to be held in a certain position, the electromagnetic reversing valve is closed, and all the inlets and outlets of the electromagnetic reversing valve are closed.
  • the normal state of the pipeline valve in the above situation is that the valve is opened and maintained in position, so the normal state of the electro-hydraulic actuator is that the electromagnetic directional valve is closed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

An electrohydraulic actuator for preventing fire damage from expanding, comprising an electromagnetic reversing valve (9), an accumulator (10) and a tubing (101) thereof, and a fuel tank (4) and a return line (41) thereof; one end of a fusible plug line (3) and a control chamber (21) of a hydraulic reversing valve (2) are both connected to the tubing (101) of the accumulator (10), and the other end of the fusible plug line (3) is connected to the return line (41) of the fuel tank (4), and the hydraulic reversing valve (2) is connected in parallel to the electromagnetic reversing valve (9) when a rotation cylinder driving valve is closed. Upon outbreak of fire, a fusible plug (31) is fused, the fusible plug line (3) is opened, high pressure oil in the control chamber of the fusible plug line (3) is discharged, the hydraulic reversing valve (2) is opened, and the high pressure oil in the accumulator (10) is reversed by means of the hydraulic reversing valve (2) and enters the port of a cylinder A, and non-pressure oil in a cylinder B flows back to the fuel tank (4), a driving rack (11) moves from the cylinder A to the cylinder B, and the driving valve is closed, thereby avoiding the expansion of fire damage.

Description

防止火灾损失扩大的电液执行器Electrohydraulic actuator to prevent fire damage from expanding 技术领域Technical field

本发明涉及一种电液执行器，具体是驱动、控制管道阀门的电液执行器。The invention relates to an electro-hydraulic actuator, in particular to an electro-hydraulic actuator that drives and controls a pipeline valve.

背景技术Background technique

在炼化厂及石油储备库等属于易燃、易爆的场合，在这样场合的管道中都设有阀门。目前驱动、控制管道阀门的电液执行器，包括旋转油缸、油箱、液压蓄能器(以下称蓄能器)及其油管，其中旋转油缸包括A和B两个油缸。电液执行器驱动、控制管道阀门时，油泵给蓄能器充油，当蓄能器达到设定的压力值时，油泵停止工作。如果阀门需要关闭，电磁换向阀左电磁铁带电，蓄能器的高压油通过电磁换向阀相应的出口进入旋转油缸的A油缸油口，B油缸的回油通过电磁换向阀相应的进口流回油箱，驱动齿条从A油缸移向B油缸，带动齿轮顺时针旋转，驱动阀门关闭；若需要阀门由闭到打开时，电磁换向阀右电磁铁带电即电磁换向阀换向，蓄能器的高压油经过电磁换向阀换向后的出口进入B油缸，A油缸的回油经过电磁换向阀换向后的进口流回油箱，驱动齿条从B油缸移向A油缸，带动齿轮逆时针旋转，驱动阀门由闭到打开；若需要阀门在某一位置保持时，电磁换向阀处于中位，电磁换向阀所有的进口和出口关闭。上述场合的管道阀门的常态是，阀门打开或关闭并保持位置，故电液执行器的常态是电磁换向阀处于中位状态。若需要改变阀门的常态如关阀门，需要电力使电磁换向阀电磁铁励磁，电液执行器才能工作。Valves are installed in the pipelines of refineries, petroleum reserves and other flammable and explosive occasions. At present, electro-hydraulic actuators that drive and control pipeline valves include rotary oil cylinders, oil tanks, hydraulic accumulators (hereinafter referred to as accumulators) and their oil pipes. The rotary oil cylinders include two oil cylinders, A and B. When the electro-hydraulic actuator drives and controls the pipeline valve, the oil pump fills the accumulator with oil. When the accumulator reaches the set pressure value, the oil pump stops working. If the valve needs to be closed, the left solenoid of the solenoid valve is charged, and the high-pressure oil of the accumulator enters the cylinder A port of the rotary cylinder through the corresponding outlet of the solenoid valve, and the return oil of the B cylinder passes the corresponding inlet of the solenoid valve. Flow back to the fuel tank, drive the rack from the A cylinder to the B cylinder, drive the gear clockwise to drive the valve to close; if the valve is required to be closed to open, the right solenoid of the electromagnetic reversing valve is charged, that is, the electromagnetic reversing valve is reversing, The high-pressure oil from the accumulator enters the oil cylinder B through the outlet reversed by the electromagnetic reversing valve. Drive the gear to rotate counterclockwise to drive the valve from closed to open; if the valve needs to be held in a certain position, the electromagnetic directional valve is in the neutral position, and all the inlets and outlets of the electromagnetic directional valve are closed. The normal state of the pipeline valve in the above situation is that the valve is opened or closed and maintained in position, so the normal state of the electro-hydraulic actuator is that the electromagnetic directional valve is in a neutral state. If it is necessary to change the normal state of the valve, such as closing the valve, electric power is needed to excite the solenoid of the electromagnetic reversing valve, so that the electro-hydraulic actuator can work.

当上述易燃、易爆的场合及其设备发生火灾或其他危险事故时，如果能在第一时间关闭阀门，阻断介质，就能够避免火灾事故的扩大，减少损失。但是在上述场合发生火灾时，一般操作是先切断电源，中断供电，这时电磁换向阀处于中位状态即电液执行器不能工作，阀门无法关闭，无法避免火灾损失扩大。When a fire or other dangerous accident occurs in the above flammable and explosive places and its equipment, if the valve can be closed and the medium can be blocked in the first time, the expansion of the fire accident can be avoided, and losses can be reduced. However, in the event of a fire in the above case, the general operation is to first cut off the power supply and interrupt the power supply. At this time, the electromagnetic reversing valve is in the neutral state, that is, the electro-hydraulic actuator cannot work, the valve cannot be closed, and the loss of the fire cannot be avoided.

发明内容Summary of the Invention

为解决上述技术问题，本发明的目的是提供一种防止火灾损失扩大的电液执行器。In order to solve the above technical problems, an object of the present invention is to provide an electro-hydraulic actuator that prevents the expansion of fire damage.

本发明的目的是这样实现的：设定旋转油缸驱动阀门关闭，齿条的移动方向是齿条自A油缸移向B油缸。本发明包括电磁换向阀、蓄能器及其油管、油箱及其回油管路，其特征是：易熔塞管路(易熔塞管路指设置了易熔塞的管路)的一端和液动换向阀的控制腔均接在蓄能器油管上，易熔塞管路另一端接在油箱的回油管路上，旋转油缸驱动阀门关闭时液动换向阀与电磁换向阀并联，即两个阀的A口、B口、P口和T口接在一起。The purpose of the present invention is achieved by setting that the rotary oil cylinder drives the valve to close, and the moving direction of the rack is that the rack moves from the A cylinder to the B cylinder. The invention includes an electromagnetic directional valve, an accumulator and its oil pipe, an oil tank and its oil return pipeline, which are characterized in that one end of a fusible plug pipeline (a fusible plug pipeline refers to a pipeline provided with a fusible plug) and The control chamber of the hydraulic reversing valve is connected to the accumulator oil pipe. The other end of the fusible plug pipe is connected to the oil return pipe of the fuel tank. When the rotary oil cylinder drives the valve to close, the hydraulic reversing valve and the electromagnetic reversing valve are connected in parallel, that is, two The A, B, P and T ports of each valve are connected together.

当上述易燃、易爆的场合及其设备没有发生火灾时，电力正常供电，易熔塞管路在常温下处于堵塞状态，蓄能器输出的高压油进入液动换向阀，液动换向阀处于中位状态，这时本发明在常温下如0002段所述维持正常工作，一般处于常态，即电磁换向阀处于中位 状态。当上述易燃、易爆的场合及其设备一旦发生火灾时，第一时间切断电源，中断供电，同时环境温度上升到250℃左右，这时易熔塞熔化，易熔塞管路开通，液动换向阀控制腔里的高压油通过易熔塞管路流回油箱，即易熔塞管路控制腔里的高压油被泄掉，这时液动换向阀换向即打开，蓄能器的高压油经过液动换向阀换，进入A油缸油口，同时B油缸里的无压油依次经过其油口、液动换向阀换，流回油箱，驱动齿条从A油缸移向B油缸，齿轮顺时针旋转，驱动阀门关闭。When there is no fire in the above flammable and explosive places and its equipment, the power is normally supplied, the fusible plug pipeline is blocked at normal temperature, and the high-pressure oil output from the accumulator enters the hydraulic directional valve, and the hydraulic directional valve In a neutral state, the present invention maintains normal operation as described in paragraph 0002 at normal temperature, and is generally in a normal state, that is, the electromagnetic directional valve is in a neutral state. When a fire occurs in the above flammable and explosive places and its equipment, the power supply is cut off for the first time, the power supply is interrupted, and the ambient temperature rises to about 250 ° C. At this time, the fusible plug is melted, the fusible plug pipe is opened, and the liquid The high-pressure oil in the control chamber of the moving reversing valve flows back to the oil tank through the fusible plug pipe, that is, the high-pressure oil in the control chamber of the fusible plug pipe is leaked. At this time, the hydraulic reversing valve is opened to change the direction of the accumulator. The high-pressure oil is changed through the hydraulic reversing valve and enters the oil port of cylinder A. At the same time, the non-pressure oil in the oil cylinder B is sequentially changed through its port and the hydraulic reversing valve and flows back to the fuel tank to drive the rack from the oil cylinder A to the oil cylinder B. The gear rotates clockwise to drive the valve closed.

与现有技术相比，本发明的积极效果是：在火灾中第一时间完成关闭阀门的作业，及时关闭阀门，避免火灾损失扩大。Compared with the prior art, the present invention has the positive effect of completing the closing operation of the valve at the first time in a fire, closing the valve in time, and preventing the expansion of the fire loss.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

下面结合附图进一步说明本发明。The invention is further described below with reference to the drawings.

图1是本发明的示意图。FIG. 1 is a schematic diagram of the present invention.

具体实施方式detailed description

设定旋转油缸1驱动阀门关闭，齿条的移动方向是齿条自A油缸移向B油缸。本发明包括旋转油缸、油箱4及其回油管路41、蓄能器10及其油管101，旋转油缸包括A和B两个油缸，易熔塞管路3的一端和液动换向阀2的控制腔21均接在蓄能器油管101上，易熔塞管路另一端接在油箱的回油管路41上，旋转油缸驱动阀门关闭时液动换向阀与电磁换向阀9并联，即两个阀的A口、B口、P口和T口接在一起。单向节流阀8调节执行器的运动速度，7是压力开关，6是节流阀。The rotary oil cylinder 1 is set to drive the valve to close, and the rack moves in the direction that the rack moves from the A cylinder to the B cylinder. The invention includes a rotary oil cylinder, an oil tank 4 and its oil return pipeline 41, an accumulator 10 and its oil pipe 101. The rotary oil cylinder includes two oil cylinders A and B, one end of a fusible plug pipeline 3, and the control of the hydraulic directional valve 2. The cavity 21 is connected to the accumulator oil pipe 101, and the other end of the fusible plug pipe is connected to the oil return pipe 41 of the fuel tank. When the rotary oil cylinder drives the valve to close, the hydraulic reversing valve and the electromagnetic reversing valve 9 are connected in parallel, that is, two The A, B, P and T ports of the valve are connected together. The one-way throttle valve 8 regulates the movement speed of the actuator, 7 is a pressure switch, and 6 is a throttle valve.

当上述易燃、易爆的场合及其设备没有发生火灾时，电力正常供电，易熔塞管路在常温下处于堵塞状态，蓄能器输出的高压油进入液动换向阀，液动换向阀处于关闭状态，这时本发明在常温下正常工作，油泵5给蓄能器充油，当蓄能器压力达到设定的压力值时，油泵停止工作。如果阀门需要关闭，电磁换向阀9左电磁铁带电，蓄能器的高压油通过电磁换向阀相应的出口进入旋转油缸的A油缸油口，B油缸的回油通过电磁换向阀相应的进口流回油箱，驱动齿条11从A油缸移向B油缸，带动齿轮12顺时针旋转，驱动阀门关闭；需要阀门由闭到打开时，电磁换向阀换向，蓄能器的高压油经过电磁换向阀换向后的出口进入B油缸，A油缸的回油经过电磁换向阀换向后的进口流回油箱，驱动齿条从B油缸移向A油缸，带动齿轮逆时针旋转，驱动阀门由闭到打开；若需要阀门在某一位置保持时，关闭电磁换向阀，电磁换向阀所有的进口和出口关闭。上述场合的管道阀门的常态是，阀门打开并保持位置，故电液执行器的常态是电磁换向阀呈关闭状态。When there is no fire in the above flammable and explosive places and its equipment, the power is normally supplied, the fusible plug pipeline is blocked at normal temperature, and the high-pressure oil output from the accumulator enters the hydraulic directional valve, and the hydraulic directional valve In the closed state, the present invention works normally at normal temperature. The oil pump 5 fills the accumulator with oil. When the pressure of the accumulator reaches a set pressure value, the oil pump stops working. If the valve needs to be closed, the left solenoid of the electromagnetic reversing valve 9 is charged, and the high-pressure oil of the accumulator enters the A cylinder port of the rotary cylinder through the corresponding outlet of the electromagnetic reversing valve, and the return oil of the B cylinder passes the corresponding electromagnetic reversing valve. The inlet flows back to the fuel tank, drives the rack 11 from the A cylinder to the B cylinder, drives the gear 12 to rotate clockwise, and drives the valve to close; when the valve is required to be closed to open, the electromagnetic reversing valve is reversed, and the high-pressure oil of the accumulator passes The outlet of the electromagnetic reversing valve after reversing enters cylinder B, and the return oil of cylinder A flows back to the tank through the reversing inlet of the electromagnetic reversing valve, driving the rack from cylinder B to cylinder A, driving the gear to rotate counterclockwise, driving The valve is closed to open; if the valve needs to be held in a certain position, the electromagnetic reversing valve is closed, and all the inlets and outlets of the electromagnetic reversing valve are closed. The normal state of the pipeline valve in the above situation is that the valve is opened and maintained in position, so the normal state of the electro-hydraulic actuator is that the electromagnetic directional valve is closed.

当上述易燃、易爆的场合及其设备发生火灾时，切断电源，中断供电，同时环境温度上升到250℃，这时易熔塞61熔化，易熔塞管路6开通，液动换向阀控制腔里的高压油通过易熔塞管路流回油箱，即易熔塞管路控制腔里的高压油被泄掉，这时液动换向阀换向 即打开，蓄能器的高压油经过液动换向阀换，进入A油缸油口，同时B油缸里的无压油依次经过其油口、液动换向阀换，流回油箱，驱动齿条从A油缸移向B油缸，齿轮顺时针旋转，驱动阀门关闭。When a fire occurs in the above flammable and explosive places and its equipment, cut off the power supply and interrupt the power supply. At the same time, the ambient temperature rises to 250 ° C. At this time, the fusible plug 61 is melted, the fusible plug pipe 6 is opened, and the hydraulically operated directional valve is opened. The high-pressure oil in the control chamber flows back to the tank through the fusible plug pipe, that is, the high-pressure oil in the control chamber of the fusible plug pipe is leaked. At this time, the hydraulic reversing valve opens and the high-pressure oil in the accumulator passes through. The hydraulic reversing valve is changed to enter the oil port of cylinder A. At the same time, the pressure-free oil in cylinder B is sequentially passed through its port and the hydraulic reversing valve is changed to flow back to the fuel tank. The rack is driven from cylinder A to cylinder B, and the gear is clockwise. Rotate to drive the valve closed.

Claims (1)

一种防止火灾损失扩大的电液执行器，包括电磁换向阀、蓄能器及其油管、油箱及其回油管路，其特征是：易熔塞管路的一端和液动换向阀的控制腔均接在蓄能器油管上，易熔塞管路另一端接在油箱的回油管路上，旋转油缸驱动阀门关闭时液动换向阀与电磁换向阀并联。An electro-hydraulic actuator for preventing fire damage from expanding includes an electromagnetic directional valve, an accumulator and its oil pipe, an oil tank and its oil return pipeline, which is characterized by the control of one end of a fusible plug pipeline and the hydraulic directional valve The chambers are all connected to the accumulator oil pipe, the other end of the fusible plug pipe is connected to the oil return pipe of the fuel tank, and when the rotary oil cylinder drives the valve to close, the hydraulic reversing valve and the electromagnetic reversing valve are connected in parallel.
PCT/CN2018/107251 2018-08-23 2018-09-25 Electrohydraulic actuator preventing fire damage from expanding Ceased WO2020037761A1 (en)

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