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CN116181710A - Self-reciprocating high-frequency valve - Google Patents

Self-reciprocating high-frequency valve Download PDF

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Publication number
CN116181710A
CN116181710A CN202111418766.8A CN202111418766A CN116181710A CN 116181710 A CN116181710 A CN 116181710A CN 202111418766 A CN202111418766 A CN 202111418766A CN 116181710 A CN116181710 A CN 116181710A
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CN
China
Prior art keywords
oil
valve
valve seat
oil pump
reciprocating
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Pending
Application number
CN202111418766.8A
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Chinese (zh)
Inventor
翟金勇
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Jiangsu Meilin Copper Co ltd
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Jiangsu Meilin Copper Co ltd
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Application filed by Jiangsu Meilin Copper Co ltd filed Critical Jiangsu Meilin Copper Co ltd
Priority to CN202111418766.8A priority Critical patent/CN116181710A/en
Publication of CN116181710A publication Critical patent/CN116181710A/en
Pending legal-status Critical Current

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • 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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
    • 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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to a self-reciprocating high-frequency valve. The reciprocating rod body is arranged in the valve seat, the first reset spring is arranged on the reciprocating rod body, the ventilation guide sleeve is connected outside the reciprocating rod body, and the hydraulic cylinder is arranged on the valve seat; the valve seat is internally provided with a valve seat, the valve seat is internally provided with a valve seat adjusting screw rod, and the valve seat adjusting screw rod is externally provided with a valve seat adjusting screw rod; the overflow valve is arranged at the rear part of the valve seat, the oil pump is arranged at the rear part of the overflow valve and is connected with the overflow valve, and the motor is arranged at the rear part of the oil pump and is connected with the oil pump; the oil tank is arranged outside the oil pump and is connected with the oil pump, the oil tank is provided with an oil supply channel and an oil return channel, the working cavity is arranged in the valve seat, and the oil supply channel and the oil return channel are respectively communicated with the working cavity. The invention can realize the automatic reciprocating motion of the reciprocating motion rod body without the forward and reverse switching of the motor or the reversing switching of the electromagnetic reversing valve, thereby greatly prolonging the service life, reducing the manufacturing and using cost and simultaneously reducing the maintenance cost.

Description

一种自往复高频阀门A self-reciprocating high-frequency valve

技术领域technical field

本发明涉及一种阀门，尤其涉及一种自往复高频阀门。The invention relates to a valve, in particular to a self-reciprocating high-frequency valve.

背景技术Background technique

现有阀门推杆的往复运动都是通过电机的正反转带动油泵的正反转来使往复运动杆体作来回往复直线运动，或是电磁换向阀的换向，使往复运动杆体作来回入复直线运动，而正由于电机的频繁正、反转的切换和电磁阀的左右换向切换，这大大降低了其使用寿命。The reciprocating motion of the existing valve push rod is driven by the positive and negative rotation of the motor to drive the positive and negative rotation of the oil pump to make the reciprocating rod body reciprocate and linearly move back and forth, or the reversing of the electromagnetic reversing valve to make the reciprocating rod body go back and forth. Complex linear motion, and because of the frequent forward and reverse switching of the motor and the left and right switching of the solenoid valve, this greatly reduces its service life.

发明内容Contents of the invention

本发明的目的在于提供一种自往复高频阀门，以解决现有技术中的问题。The purpose of the present invention is to provide a self-reciprocating high-frequency valve to solve the problems in the prior art.

本发明的技术方案是：一种自往复高频阀门，所述的阀门包括往复运动杆体、透气导向套、液压缸、复位弹簧一、阀座、滑阀芯、复位弹簧二、滑阀芯调节螺杆、溢流阀、油泵、电机、油箱、供油通道、回油通道和工作腔；The technical solution of the present invention is: a self-reciprocating high-frequency valve, the valve includes a reciprocating rod body, a ventilating guide sleeve, a hydraulic cylinder, a return spring one, a valve seat, a slide valve core, a return spring two, and a slide valve core adjustment Screw, overflow valve, oil pump, motor, oil tank, oil supply channel, oil return channel and working chamber;

所述的往复运动杆体设置在阀座内，所述的复位弹簧一设置在往复运动杆体上，所述的透气导向套连接在往复运动杆体外，所述的液压缸设置在阀座上；The reciprocating rod body is arranged in the valve seat, the return spring is arranged on the reciprocating rod body, the breathable guide sleeve is connected to the reciprocating rod body, and the hydraulic cylinder is arranged on the valve seat;

所述的滑阀芯设置在阀座内部，所述的滑阀芯调节螺杆与滑阀芯相联接，所述的滑阀芯调节螺杆外设置有复位弹簧二；The spool valve core is arranged inside the valve seat, the spool valve core adjusting screw is connected with the spool valve core, and a return spring 2 is arranged outside the spool valve adjusting screw rod;

所述的溢流阀设置在阀座的后部，所述的油泵设置在溢流阀的后部，并与溢流阀相联接，所述的电机设置在油泵的后部，并与油泵相联接；The relief valve is arranged at the rear of the valve seat, the oil pump is arranged at the rear of the relief valve and connected with the relief valve, the motor is arranged at the rear of the oil pump and connected with the oil pump connection;

所述的油箱设置在油泵的外部并与油泵相联接，所述的油箱上设置有供油通道和回油通道，所述的工作腔设置在阀座内，所述的供油通道与回油通道分别与工作腔相连通。The oil tank is arranged outside the oil pump and connected with the oil pump. The oil tank is provided with an oil supply channel and an oil return channel. The working chamber is arranged in the valve seat. The oil supply channel and the oil return channel The channels communicate with the working chambers respectively.

优选地，所述的供油通道依次连接油箱、油泵、溢流阀、滑阀芯和工作腔。Preferably, the oil supply channel is sequentially connected with the oil tank, the oil pump, the overflow valve, the slide valve core and the working chamber.

优选地，所述的回油通道依次连接油箱、滑阀芯和工作腔。Preferably, the oil return channel is sequentially connected to the oil tank, the slide valve core and the working chamber.

本发明的有益效果是：无需电机正、反转切换或电磁换向阀换向切换，即可实现往复运动杆体的自动往复运动，这大大的延长了使用寿命，降低了制造及使用成本，同时也减少了维护修养费用。The beneficial effect of the present invention is that the automatic reciprocating motion of the reciprocating rod body can be realized without the forward and reverse switching of the motor or the reversing switching of the electromagnetic reversing valve, which greatly prolongs the service life, reduces the manufacturing and use costs, and at the same time Maintenance costs are also reduced.

附图说明Description of drawings

图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.

图中1是往复运动杆体，2是透气导向套，3是液压缸，4是复位弹簧一，5是阀座，6是滑阀芯，7是复位弹簧二，8是滑阀芯调节螺杆，9是溢流阀，10是油泵，11是电机，12是油箱，13是供油管道，14是回油管道，15是工作腔。In the figure, 1 is a reciprocating rod body, 2 is a ventilating guide sleeve, 3 is a hydraulic cylinder, 4 is a return spring 1, 5 is a valve seat, 6 is a slide valve core, 7 is a return spring 2, 8 is a slide valve core adjustment screw, 9 is an overflow valve, 10 is an oil pump, 11 is a motor, 12 is an oil tank, 13 is an oil supply pipeline, 14 is an oil return pipeline, and 15 is a working chamber.

具体实施方式Detailed ways

一种自往复高频阀门，所述的阀门包括往复运动杆体1、透气导向套2、液压缸3、复位弹簧一4、阀座5、滑阀芯6、复位弹簧二7、滑阀芯调节螺杆8、溢流阀9、油泵10、电机11、油箱12、供油通道13、回油通道14和工作腔15；A self-reciprocating high-frequency valve, the valve includes a reciprocating rod body 1, a breathable guide sleeve 2, a hydraulic cylinder 3, a return spring one 4, a valve seat 5, a slide valve core 6, a return spring two 7, and a slide valve core adjustment Screw 8, overflow valve 9, oil pump 10, motor 11, oil tank 12, oil supply passage 13, oil return passage 14 and working chamber 15;

所述的往复运动杆体1设置在阀座5内，所述的复位弹簧一4设置在往复运动杆体1上，所述的透气导向套2连接在往复运动杆体1外，所述的液压缸3设置在阀座5上；The reciprocating rod body 1 is arranged in the valve seat 5, the return spring 1 is arranged on the reciprocating rod body 1, the breathable guide sleeve 2 is connected outside the reciprocating rod body 1, and the hydraulic cylinder 3 set on the valve seat 5;

所述的滑阀芯6设置在阀座5内部，所述的滑阀芯调节螺杆8与滑阀芯6相联接，所述的滑阀芯调节螺杆8外设置有复位弹簧二7；The spool 6 is arranged inside the valve seat 5, the spool adjusting screw 8 is connected with the spool 6, and the spool adjusting screw 8 is provided with a return spring 2 7 outside;

所述的溢流阀9设置在阀座5的后部，所述的油泵10设置在溢流阀9的后部，并与溢流阀9相联接，所述的电机11设置在油泵10的后部，并与油泵10相联接；The relief valve 9 is arranged at the rear of the valve seat 5, the oil pump 10 is arranged at the rear of the relief valve 9, and is connected with the relief valve 9, and the motor 11 is arranged at the back of the oil pump 10 Rear, and connected with oil pump 10;

所述的油箱12设置在油泵10的外部并与油泵10相联接，所述的油箱12上设置有供油通道13和回油通道14，所述的工作腔15设置在阀座5内，所述的供油通道13与回油通道14分别与工作腔15相连通。The oil tank 12 is arranged outside the oil pump 10 and connected with the oil pump 10. The oil tank 12 is provided with an oil supply passage 13 and an oil return passage 14. The working chamber 15 is arranged in the valve seat 5. The above-mentioned oil supply passage 13 and oil return passage 14 communicate with the working chamber 15 respectively.

所述的供油通道13依次连接油箱12、油泵10、溢流阀9、滑阀芯6和工作腔15。The oil supply channel 13 is sequentially connected with the oil tank 12 , the oil pump 10 , the relief valve 9 , the slide valve core 6 and the working chamber 15 .

所述的回油通道14依次连接油箱12、滑阀芯6和工作腔15。The oil return channel 14 is sequentially connected with the oil tank 12 , the spool 6 and the working chamber 15 .

本发明的工作原理：由电机11通电旋转（右旋）带动单向高压油泵10工作，输出高压油，经过溢流阀9进入供油通道13再进入工作腔15和滑阀芯6的一端，此时往复运动杆体1在高压油的推动下，克服复位弹簧一4的作用力向左伸出，当伸出到达终点时，系统压力进一步升高，当大于复位弹簧二7对滑阀芯6的作用力时，滑阀芯6打开，从而打开回油通道14，使高压油经回油通道14回流到油箱12，此时供油通道13内的压力迅速降为0，即工作腔15的压力为0，同时在复位弹簧一4的作用下，往复运动杆体1迅速缩回至终端，此时在复位弹簧二7的作用下，滑阀芯6又迅速关闭，并关闭回油通道14，供油通道13又开始建立高压油，并推动往复运动杆体1伸出，如此循环，只要电机通电旋转，往复运动杆体1就不停的做往复直线运动。The working principle of the present invention: the one-way high-pressure oil pump 10 is driven to work by the motor 11 energized and rotated (right-handed), and the high-pressure oil is output, and enters the oil supply channel 13 through the overflow valve 9, and then enters the working chamber 15 and one end of the spool 6, At this time, the reciprocating rod body 1 is pushed by the high-pressure oil to overcome the force of the return spring 1 and stretch out to the left. When the extension reaches the end point, the system pressure will further increase. When the force is applied, the spool 6 opens, thereby opening the oil return passage 14, so that the high-pressure oil flows back to the oil tank 12 through the oil return passage 14. At this time, the pressure in the oil supply passage 13 drops to 0 rapidly, that is, the pressure of the working chamber 15 The pressure is 0, and at the same time, under the action of the return spring 1 4, the reciprocating rod body 1 quickly retracts to the terminal, at this time, under the action of the return spring 2 7, the slide valve core 6 is quickly closed again, and the oil return passage 14 is closed. The oil supply channel 13 begins to build up high-pressure oil again, and pushes the reciprocating rod body 1 to stretch out, and so on, as long as the motor is energized and rotates, the reciprocating rod body 1 just keeps doing reciprocating linear motion.

在本发明的描述中，需要理解的是，指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

在本发明中，除非另有明确的规定和限定，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise specified and limited, for example, it can be fixed connection, detachable connection, or integrated; it can be mechanical connection or electrical connection; it can be direct connection or The indirect connection through an intermediary can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, those of ordinary skill in the art can understand the above terms in the present invention according to the specific situation. specific meaning in .

Claims (3)

1.一种自往复高频阀门，其特征在于：所述的阀门包括往复运动杆体（1）、透气导向套（2）、液压缸（3）、复位弹簧一（4）、阀座（5）、滑阀芯（6）、复位弹簧二（7）、滑阀芯调节螺杆（8）、溢流阀（9）、油泵（10）、电机（11）、油箱（12）、供油通道（13）、回油通道（14）和工作腔（15）；1. A self-reciprocating high-frequency valve, characterized in that: the valve includes a reciprocating rod body (1), a breathable guide sleeve (2), a hydraulic cylinder (3), a return spring (4), a valve seat (5 ), spool (6), return spring two (7), spool adjustment screw (8), relief valve (9), oil pump (10), motor (11), fuel tank (12), oil supply channel (13), oil return channel (14) and working chamber (15); 所述的往复运动杆体（1）设置在阀座（5）内，所述的复位弹簧一（4）设置在往复运动杆体（1）上，所述的透气导向套（2）连接在往复运动杆体（1）外，所述的液压缸（3）设置在阀座（5）上；The reciprocating rod body (1) is set in the valve seat (5), the return spring one (4) is set on the reciprocating rod body (1), and the breathable guide sleeve (2) is connected in the reciprocating motion Outside the rod body (1), the hydraulic cylinder (3) is set on the valve seat (5); 所述的滑阀芯（6）设置在阀座（5）内部，所述的滑阀芯调节螺杆（8）与滑阀芯（6）相联接，所述的滑阀芯调节螺杆（8）外设置有复位弹簧二（7）；The spool (6) is set inside the valve seat (5), the spool adjustment screw (8) is connected with the spool (6), and the spool adjustment screw (8) The external device is provided with a return spring two (7); 所述的溢流阀（9）设置在阀座（5）的后部，所述的油泵（10）设置在溢流阀（9）的后部，并与溢流阀（9）相联接，所述的电机（11）设置在油泵（10）的后部，并与油泵（10）相联接；The relief valve (9) is arranged at the rear of the valve seat (5), and the oil pump (10) is arranged at the rear of the relief valve (9) and connected with the relief valve (9), The motor (11) is arranged at the rear of the oil pump (10) and connected with the oil pump (10); 所述的油箱（12）设置在油泵（10）的外部并与油泵（10）相联接，所述的油箱（12）上设置有供油通道（13）和回油通道（14），所述的工作腔（15）设置在阀座（5）内，所述的供油通道（13）与回油通道（14）分别与工作腔（15）相连通。The oil tank (12) is arranged outside the oil pump (10) and connected with the oil pump (10). The oil tank (12) is provided with an oil supply channel (13) and an oil return channel (14). The working chamber (15) is set in the valve seat (5), and the oil supply passage (13) and the oil return passage (14) communicate with the working chamber (15) respectively. 2.根据权利要求1所述的一种自往复高频滑阀，其特征在于：所述的供油通道（13）依次连接油箱（12）、油泵（10）、溢流阀（9）、滑阀芯（6）和工作腔（15）。2. A self-reciprocating high-frequency slide valve according to claim 1, characterized in that: the oil supply channel (13) is sequentially connected to the oil tank (12), oil pump (10), overflow valve (9), Spool (6) and working chamber (15). 3.根据权利要求1所述的一种自往复高频滑阀，其特征在于：所述的回油通道（14）依次连接油箱（12）、滑阀芯（6）和工作腔（15）。3. A self-reciprocating high-frequency slide valve according to claim 1, characterized in that: the oil return channel (14) is sequentially connected to the oil tank (12), the slide valve core (6) and the working chamber (15) .
CN202111418766.8A 2021-11-26 2021-11-26 Self-reciprocating high-frequency valve Pending CN116181710A (en)

Priority Applications (1)

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CN202111418766.8A CN116181710A (en) 2021-11-26 2021-11-26 Self-reciprocating high-frequency valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119467480A (en) * 2025-01-16 2025-02-18 上海风雷阀门集团有限公司 Self-reciprocating high-frequency valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1291035A (en) * 1971-05-01 1972-09-27 Frank Davison Chainsaw oil pump
CN1158393A (en) * 1995-10-24 1997-09-03 Bs&B安全体系股份有限公司 Rupture disk apparatus and methods
CN1554873A (en) * 2003-12-25 2004-12-15 宁波华液机器制造有限公司 Ratio pressure difference control valve
CN104728206A (en) * 2015-03-23 2015-06-24 南京苏瓦科技开发有限公司 Non-external-control automatic reciprocating hydraulic cylinder
CN112065819A (en) * 2020-10-10 2020-12-11 昆山海芯机电科技有限公司 Compact electro-hydraulic actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1291035A (en) * 1971-05-01 1972-09-27 Frank Davison Chainsaw oil pump
CN1158393A (en) * 1995-10-24 1997-09-03 Bs&B安全体系股份有限公司 Rupture disk apparatus and methods
CN1554873A (en) * 2003-12-25 2004-12-15 宁波华液机器制造有限公司 Ratio pressure difference control valve
CN104728206A (en) * 2015-03-23 2015-06-24 南京苏瓦科技开发有限公司 Non-external-control automatic reciprocating hydraulic cylinder
CN112065819A (en) * 2020-10-10 2020-12-11 昆山海芯机电科技有限公司 Compact electro-hydraulic actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119467480A (en) * 2025-01-16 2025-02-18 上海风雷阀门集团有限公司 Self-reciprocating high-frequency valve

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