WO2022143357A1 - Bidirectional speed-adjustment hydraulic valve group - Google Patents

Bidirectional speed-adjustment hydraulic valve group Download PDF

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WO2022143357A1
WO2022143357A1 PCT/CN2021/140651 CN2021140651W WO2022143357A1 WO 2022143357 A1 WO2022143357 A1 WO 2022143357A1 CN 2021140651 W CN2021140651 W CN 2021140651W WO 2022143357 A1 WO2022143357 A1 WO 2022143357A1
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Prior art keywords
valve
check valve
hydraulic control
port
oil port
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PCT/CN2021/140651
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French (fr)
Chinese (zh)
Inventor
刘长驰
朱蓉洁
杜岚
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江苏省无锡探矿机械总厂有限公司
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Publication of WO2022143357A1 publication Critical patent/WO2022143357A1/en

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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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • 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
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Definitions

  • the invention relates to a two-way speed regulating hydraulic valve group, which belongs to the technical field of drilling rig hydraulics.
  • the groundwater sampling and repairing integrated drilling rig needs to pressurize and lift the working device, and the pressurization and lifting preferably have the speed regulation function, then the speed and pressure of the pressurization and lifting can be adjusted in real time according to the working conditions, and the performance of the whole machine can be improved. , If the pressurization speed regulation and the lifting speed regulation are combined into one, it saves space, the installation is simple, and the cost can be reduced.
  • the purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a two-way speed regulating hydraulic valve group, which can adjust the speed and pressure of the pressurization and lifting of the working device in both directions, and improve the performance of the whole machine.
  • the structure is simple, the volume is small, and the installation It is convenient, the pipeline connection is simple, safe and reliable, and the cost is low.
  • a two-way speed regulating hydraulic valve group comprising a proportional speed regulating valve, the inlet of the proportional speed regulating valve is connected with the inlet of an electromagnetic proportional relief valve, and the outlet of the electromagnetic proportional relief valve is connected. It communicates with the oil return port, the inlet of the proportional speed control valve is connected with the outlet of the first check valve and the second check valve at the same time, and the outlet of the proportional speed control valve is connected with the first hydraulic control check valve and the second check valve at the same time.
  • the outlets of the two hydraulic control check valves are connected, the inlet of the first hydraulic control check valve is communicated with the first working oil port, the inlet of the second hydraulic control check valve is communicated with the second working oil port, and the The hydraulic control port of the first hydraulic control check valve is communicated with the first pressure oil port, the hydraulic control port of the second hydraulic control check valve is communicated with the second pressure oil port, and the inlet of the first check valve is communicated with the second pressure oil port.
  • the first pressure oil port is communicated with, the inlet of the second check valve is communicated with the second pressure oil port, the outlet of the third check valve is communicated with the first pressure oil port, and the inlet of the third check valve is communicated with It communicates with the first working oil port, the outlet of the fourth check valve communicates with the second pressure oil port, and the inlet of the fourth check valve communicates with the second working oil port.
  • the first pressure oil port is connected to the corresponding oil port of the main valve.
  • the second pressure oil port is connected to the corresponding oil port of the main valve.
  • the oil return port communicates with the oil tank.
  • the first working oil port is connected to the rodless cavity of the oil cylinder.
  • the second working oil port is connected with the rod cavity of the oil cylinder.
  • the present invention has the following advantages:
  • the invention can realize the function of speed regulation on both sides of the pressurized lifting oil cylinder, which improves the performance of the whole machine; the structure is simple, the volume is small, and the installation is easy; the pipeline connection is simple, safe and reliable, and the cost is low.
  • Figure 1 is a schematic structural diagram of the present invention.
  • a two-way speed regulating hydraulic valve group includes a proportional speed regulating valve 2, the inlet of the proportional speed regulating valve 2 is connected with the inlet of the electromagnetic proportional relief valve 6, and the outlet of the electromagnetic proportional relief valve 6 is connected to the return valve 6.
  • the oil port 9 is connected, the inlet of the proportional speed control valve 2 is connected with the outlet of the first check valve 7 and the second check valve 5 at the same time, and the outlet of the proportional speed control valve 2 is connected with the first hydraulic control check valve 1 and the second check valve at the same time.
  • the outlets of the second hydraulic control check valve 3 are connected, the inlet of the first hydraulic control check valve 1 is communicated with the first working oil port 10, the inlet of the second hydraulic control check valve 3 is communicated with the second working oil port 11, and the first hydraulic control check valve 3 is communicated with the second working oil port 11.
  • the hydraulic control port of a hydraulic control check valve 1 communicates with the first pressure oil port 12, the hydraulic control port of the second hydraulic control check valve 3 communicates with the second pressure oil port 13, and the inlet of the first check valve 7 communicates with the second pressure oil port 13.
  • the first pressure oil port 12 is communicated, the inlet of the second check valve 5 is communicated with the second pressure oil port 13, the outlet of the third check valve 8 is communicated with the first pressure oil port 12, and the inlet of the third check valve 8 is communicated with It communicates with the first working oil port 10 , the outlet of the fourth check valve 4 communicates with the second pressure oil port 13 , and the inlet of the fourth check valve 4 communicates with the second working oil port 11 .
  • the first pressure oil port 12 is connected with the outlet corresponding to the main valve, the second pressure oil port 13 is connected with the corresponding outlet of the main valve, and the first working oil port 10 is connected with the rodless cavity of the oil cylinder to supply oil under pressure for the actuator;
  • the second working oil port 11 is connected with the rod cavity of the oil cylinder to supply oil for the lifting of the actuator.
  • a working oil port 10 enters the rodless cavity of the oil cylinder to supply oil under pressure for the actuator, and the oil in the rod cavity returns oil through the second working oil port 11, the fourth check valve 4 and the second pressure port 13; control The main valve makes the second pressure port 13 supply pressure oil, and the first pressure port 12 has no pressure oil, then the pressure oil passes through the second check valve 5, the proportional speed regulating valve 2 and the second hydraulic control check valve 3 to reach the second
  • the working oil port 11 enters the rod cavity of the cylinder to supply oil for the lifting of the actuator.
  • the oil in the rodless cavity returns to the oil through the first working oil port 10 , the third one-way valve 8 and the first pressure port 12 .
  • the set pressure of the electromagnetic proportional relief valve 6 is the working pressure of the oil cylinder, and the pressure can be adjusted at any time.
  • the function of the first one-way valve 7 is to separate the pressure interference of the second pressure port 13 to the first pressure port 12
  • the function of the second one-way valve 5 is to separate the first pressure port 12 from the second pressure port 13 . pressure interference.
  • the function of the first hydraulic control check valve 1 is to separate the pressure interference of the second working oil port 11 to the first working oil port 10
  • the function of the second hydraulic control check valve 3 is to separate the first working oil port. 10 Interference with the pressure of the second working oil port 11.
  • the function of the third check valve 8 is to separate the hydraulic control oil of the first hydraulic control check valve 1 from the first working oil port 10, so that the pressure oil enters the non-liver cavity of the oil cylinder after passing through the speed control of the proportional speed control valve 2.
  • the function of the fourth check valve 4 is to separate the hydraulic control oil of the second hydraulic control check valve 3 and the second working oil port 11, so that the pressure oil passes through the speed control of the proportional speed control valve 2 and enters the cylinder without rods. cavity.

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

Abstract

A bidirectional speed-adjustment hydraulic valve group, comprising a proportional speed-adjustment valve (2); an inlet of the proportional speed-adjustment valve (2) is connected to an inlet of an electromagnetic proportional overflow valve (6); an outlet of the electromagnetic proportional overflow valve (6) is in communication with a fluid return port (9); the inlet of the proportional speed-adjustment valve (2) is connected to both an outlet of a first one-way valve (7) and an outlet of a second one-way valve (5); an outlet of the proportional speed-adjustment valve (2) is connected to both an outlet of a first hydraulic control one-way valve (1) and an outlet of a second hydraulic control one-way valve (3); an inlet of the first hydraulic control one-way valve (1) is in communication with a first working fluid port (10); an inlet of the second hydraulic control one-way valve (3) is in communication with a second working fluid port (11); a hydraulic control port of the first hydraulic control one-way valve (1) is in communication with a first pressure fluid port (12); and a hydraulic control port of the second hydraulic control one-way valve (3) is in communication with a second pressure fluid port (13). The valve group can bidirectionally adjust the pressurizing and lifting speed and pressure of a working device, improves the performance of the whole machine, has a simple structure and a small size, is convenient to install, allows simple connection of pipelines, is safe and reliable, and has low costs.

Description

一种双向调速液压阀组A two-way speed regulating hydraulic valve group 技术领域technical field
本发明涉及一种双向调速液压阀组，属于钻机液压技术领域。The invention relates to a two-way speed regulating hydraulic valve group, which belongs to the technical field of drilling rig hydraulics.
背景技术Background technique
地下水取样修复一体钻机，需要进行对工作装置加压与提升动作，并且加压与提升最好具有调速功能，则可以根据工况来实时调整加压与提升的速度及压力，提升整机性能，如果将加压调速与提升调速合二为一，即节省空间，安装简单，又可以降低成本。The groundwater sampling and repairing integrated drilling rig needs to pressurize and lift the working device, and the pressurization and lifting preferably have the speed regulation function, then the speed and pressure of the pressurization and lifting can be adjusted in real time according to the working conditions, and the performance of the whole machine can be improved. , If the pressurization speed regulation and the lifting speed regulation are combined into one, it saves space, the installation is simple, and the cost can be reduced.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于克服现有技术中存在的不足，提供一种双向调速液压阀组，可以双向调节工作装置加压与提升的速度及压力，提升整机性能，结构简单，体积小，安装方便，管路连接简单，安全可靠，成本低廉。The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a two-way speed regulating hydraulic valve group, which can adjust the speed and pressure of the pressurization and lifting of the working device in both directions, and improve the performance of the whole machine. The structure is simple, the volume is small, and the installation It is convenient, the pipeline connection is simple, safe and reliable, and the cost is low.
按照本发明提供的技术方案：一种双向调速液压阀组，包括比例调速阀，所述比例调速阀的进口与电磁比例溢流阀的进口相连，所述电磁比例溢流阀的出口与回油口相通，所述比例调速阀的进口同时与第一单向阀及第二单向阀的出口相连，所述比例调速阀的出口同时与第一液控单向阀及第二液控单向阀的出口相连，所述第一液控单向阀的进口与第一工作油口相通，所述第二液控单向阀的进口与第二工作油口相通，所述第一液控单向阀的液控口与第一压力油口相通，所述第二液控单向阀的液控口与第二压力油口相通，所述第一单向阀的进口与第一压力油口相通，所述第二单向阀的进口与第二压力油口相通，所述第三单向阀的出口与第一压力油口相通，所述第三单向阀的进口与第一工作油口相通，所述第四单向阀的出口与第二压力油口相通，所述第四单向阀的进口与第二工作油口相通。According to the technical solution provided by the present invention: a two-way speed regulating hydraulic valve group, comprising a proportional speed regulating valve, the inlet of the proportional speed regulating valve is connected with the inlet of an electromagnetic proportional relief valve, and the outlet of the electromagnetic proportional relief valve is connected. It communicates with the oil return port, the inlet of the proportional speed control valve is connected with the outlet of the first check valve and the second check valve at the same time, and the outlet of the proportional speed control valve is connected with the first hydraulic control check valve and the second check valve at the same time. The outlets of the two hydraulic control check valves are connected, the inlet of the first hydraulic control check valve is communicated with the first working oil port, the inlet of the second hydraulic control check valve is communicated with the second working oil port, and the The hydraulic control port of the first hydraulic control check valve is communicated with the first pressure oil port, the hydraulic control port of the second hydraulic control check valve is communicated with the second pressure oil port, and the inlet of the first check valve is communicated with the second pressure oil port. The first pressure oil port is communicated with, the inlet of the second check valve is communicated with the second pressure oil port, the outlet of the third check valve is communicated with the first pressure oil port, and the inlet of the third check valve is communicated with It communicates with the first working oil port, the outlet of the fourth check valve communicates with the second pressure oil port, and the inlet of the fourth check valve communicates with the second working oil port.
作为本发明的进一步改进，所述第一压力油口与主阀对应油口相连。As a further improvement of the present invention, the first pressure oil port is connected to the corresponding oil port of the main valve.
作为本发明的进一步改进，所述第二压力油口与主阀对应油口相连。As a further improvement of the present invention, the second pressure oil port is connected to the corresponding oil port of the main valve.
作为本发明的进一步改进，所述回油口与油箱相通。As a further improvement of the present invention, the oil return port communicates with the oil tank.
作为本发明的进一步改进，所述第一工作油口与油缸无杆腔相连。As a further improvement of the present invention, the first working oil port is connected to the rodless cavity of the oil cylinder.
作为本发明的进一步改进，所述第二工作油口与油缸有杆腔相连。As a further improvement of the present invention, the second working oil port is connected with the rod cavity of the oil cylinder.
本发明与现有技术相比，具有如下优点：Compared with the prior art, the present invention has the following advantages:
本发明可实现为加压提升油缸两侧调速功能，提高了整机性能；并且结构简单，体积小，易安装；管路连接简单，安全可靠，成本低廉。The invention can realize the function of speed regulation on both sides of the pressurized lifting oil cylinder, which improves the performance of the whole machine; the structure is simple, the volume is small, and the installation is easy; the pipeline connection is simple, safe and reliable, and the cost is low.
附图说明Description of drawings
图1是本发明的结构示意图。Figure 1 is a schematic structural diagram of the present invention.
附图标记说明：1-第一液控单向阀、2-比例调速阀、3-第二液控单向阀、4-第四单向阀、5-第二单向阀、6-电磁比例溢流阀、7-第一单向阀、8-第三单向阀、9-回油口、10-第一工作油口、11-第二工作油口、12-第一压力油口、13-第二 压力油口。Description of reference numerals: 1-first hydraulic control check valve, 2-proportional speed regulating valve, 3-second hydraulic control check valve, 4-fourth check valve, 5-second check valve, 6- Electromagnetic proportional relief valve, 7-first check valve, 8-third check valve, 9-oil return port, 10-first working oil port, 11-second working oil port, 12-first pressure oil Port, 13-Second pressure oil port.
具体实施方式Detailed ways
下面结合具体附图对本发明作进一步说明。The present invention will be further described below with reference to the specific drawings.
如图1所示，一种双向调速液压阀组，包括比例调速阀2，比例调速阀2的进口与电磁比例溢流阀6的进口相连，电磁比例溢流阀6的出口与回油口9相通，比例调速阀2的进口同时与第一单向阀7及第二单向阀5的出口相连，比例调速阀2的出口同时与第一液控单向阀1及第二液控单向阀3的出口相连，第一液控单向阀1的进口与第一工作油口10相通，第二液控单向阀3的进口与第二工作油口11相通，第一液控单向阀1的液控口与第一压力油口12相通，第二液控单向阀3的液控口与第二压力油口13相通，第一单向阀7的进口与第一压力油口12相通，第二单向阀5的进口与第二压力油口13相通，第三单向阀8的出口与第一压力油口12相通，第三单向阀8的进口与第一工作油口10相通，第四单向阀4的出口与第二压力油口13相通，第四单向阀4的进口与第二工作油口11相通。As shown in Figure 1, a two-way speed regulating hydraulic valve group includes a proportional speed regulating valve 2, the inlet of the proportional speed regulating valve 2 is connected with the inlet of the electromagnetic proportional relief valve 6, and the outlet of the electromagnetic proportional relief valve 6 is connected to the return valve 6. The oil port 9 is connected, the inlet of the proportional speed control valve 2 is connected with the outlet of the first check valve 7 and the second check valve 5 at the same time, and the outlet of the proportional speed control valve 2 is connected with the first hydraulic control check valve 1 and the second check valve at the same time. The outlets of the second hydraulic control check valve 3 are connected, the inlet of the first hydraulic control check valve 1 is communicated with the first working oil port 10, the inlet of the second hydraulic control check valve 3 is communicated with the second working oil port 11, and the first hydraulic control check valve 3 is communicated with the second working oil port 11. The hydraulic control port of a hydraulic control check valve 1 communicates with the first pressure oil port 12, the hydraulic control port of the second hydraulic control check valve 3 communicates with the second pressure oil port 13, and the inlet of the first check valve 7 communicates with the second pressure oil port 13. The first pressure oil port 12 is communicated, the inlet of the second check valve 5 is communicated with the second pressure oil port 13, the outlet of the third check valve 8 is communicated with the first pressure oil port 12, and the inlet of the third check valve 8 is communicated with It communicates with the first working oil port 10 , the outlet of the fourth check valve 4 communicates with the second pressure oil port 13 , and the inlet of the fourth check valve 4 communicates with the second working oil port 11 .
第一压力油口12与主阀对应的出口相连，第二压力油口13与主阀对应的出口相连，第一工作油口10与油缸无杆腔相连，为执行元件加压供油；第二工作油口11与油缸有杆腔相连，为执行元件提升供油。The first pressure oil port 12 is connected with the outlet corresponding to the main valve, the second pressure oil port 13 is connected with the corresponding outlet of the main valve, and the first working oil port 10 is connected with the rodless cavity of the oil cylinder to supply oil under pressure for the actuator; The second working oil port 11 is connected with the rod cavity of the oil cylinder to supply oil for the lifting of the actuator.
本发明的工作过程如下：The working process of the present invention is as follows:
控制主阀，使第一压力口12供压力油，第二压力口13无压力油，则压力油通过第一单向阀7、比例调速阀2及第一液控单向阀1到达第一工作油口10，进入油缸无杆腔，为执行元件加压供油，有杆腔油液通过第二工作油口11、第四单向阀4及第二压力口13进行回油；控制主阀，使第二压力口13供压力油，第一压力口12无压力油，则压力油通过第二单向阀5、比例调速阀2及第二液控单向阀3到达第二工作油口11进入油缸有杆腔，为执行元件提升供油，无杆腔油液通过第一工作油口10、第三单向阀8及第一压力口12进行回油。电磁比例溢流阀6的设定压力即为油缸动作的工作压力，并可随时调压。Control the main valve so that the first pressure port 12 is supplied with pressure oil, and the second pressure port 13 has no pressure oil, then the pressure oil passes through the first check valve 7, the proportional speed regulating valve 2 and the first hydraulic control check valve 1 to reach the first check valve. A working oil port 10 enters the rodless cavity of the oil cylinder to supply oil under pressure for the actuator, and the oil in the rod cavity returns oil through the second working oil port 11, the fourth check valve 4 and the second pressure port 13; control The main valve makes the second pressure port 13 supply pressure oil, and the first pressure port 12 has no pressure oil, then the pressure oil passes through the second check valve 5, the proportional speed regulating valve 2 and the second hydraulic control check valve 3 to reach the second The working oil port 11 enters the rod cavity of the cylinder to supply oil for the lifting of the actuator. The oil in the rodless cavity returns to the oil through the first working oil port 10 , the third one-way valve 8 and the first pressure port 12 . The set pressure of the electromagnetic proportional relief valve 6 is the working pressure of the oil cylinder, and the pressure can be adjusted at any time.
第一单向阀7的作用是隔开了第二压力口13对第一压力口12的压力干扰，第二单向阀5的作用是隔开了第一压力口12对第二压力口13的压力干扰。The function of the first one-way valve 7 is to separate the pressure interference of the second pressure port 13 to the first pressure port 12 , and the function of the second one-way valve 5 is to separate the first pressure port 12 from the second pressure port 13 . pressure interference.
第一液控单向阀1的作用是隔开了第二工作油口11对第一工作油口10的压力干扰，第二液控单向阀3的作用是隔开了第一工作油口10对第二工作油口11的压力干扰.The function of the first hydraulic control check valve 1 is to separate the pressure interference of the second working oil port 11 to the first working oil port 10, and the function of the second hydraulic control check valve 3 is to separate the first working oil port. 10 Interference with the pressure of the second working oil port 11.
第三单向阀8的作用是隔开了第一液控单向阀1的液控油与第一工作油口10，使压力油通过比例调速阀2的调速后，进入油缸无肝腔；第四单向阀4的作用是隔开了第二液控单向阀3的液控油与第二工作油口11，使压力油通过比例调速阀2的调速后，进入油缸无杆腔。The function of the third check valve 8 is to separate the hydraulic control oil of the first hydraulic control check valve 1 from the first working oil port 10, so that the pressure oil enters the non-liver cavity of the oil cylinder after passing through the speed control of the proportional speed control valve 2. The function of the fourth check valve 4 is to separate the hydraulic control oil of the second hydraulic control check valve 3 and the second working oil port 11, so that the pressure oil passes through the speed control of the proportional speed control valve 2 and enters the cylinder without rods. cavity.
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, without departing from the spirit and essence of the present invention, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (6)

  1. 一种双向调速液压阀组，其特征在于，包括比例调速阀(2)，所述比例调速阀(2)的进口与电磁比例溢流阀(6)的进口相连，所述电磁比例溢流阀(6)的出口与回油口(9)相通，所述比例调速阀(2)的进口同时与第一单向阀(7)及第二单向阀(5)的出口相连，所述比例调速阀(2)的出口同时与第一液控单向阀(1)及第二液控单向阀(3)的出口相连；所述第一液控单向阀(1)的进口与第一工作油口(10)相通，所述第二液控单向阀(3)的进口与第二工作油口(11)相通，所述第一液控单向阀(1)的液控口与第一压力油口(12)相通，所述第二液控单向阀(3)的液控口与第二压力油口(13)相通，所述第一单向阀(7)的进口与第一压力油口(12)相通，所述第二单向阀(5)的进口与第二压力油口(13)相通，所述第三单向阀(8)的出口与第一压力油口(12)相通，所述第三单向阀(8)的进口与第一工作油口(10)相通，所述第四单向阀(4)的出口与第二压力油口(13)相通，所述第四单向阀(4)的进口与第二工作油口(11)相通。A two-way speed regulating hydraulic valve group is characterized in that it comprises a proportional speed regulating valve (2), the inlet of the proportional speed regulating valve (2) is connected with the inlet of an electromagnetic proportional relief valve (6), and the electromagnetic proportional The outlet of the relief valve (6) is connected with the oil return port (9), and the inlet of the proportional speed control valve (2) is connected with the outlet of the first check valve (7) and the second check valve (5) at the same time , the outlet of the proportional speed regulating valve (2) is connected with the outlet of the first hydraulic control check valve (1) and the second hydraulic control check valve (3) at the same time; the first hydraulic control check valve (1) ) is communicated with the first working oil port (10), the inlet of the second hydraulic control check valve (3) is communicated with the second working oil port (11), and the first hydraulic control check valve (1) ) is communicated with the first pressure oil port (12), the hydraulic control port of the second hydraulic control check valve (3) is communicated with the second pressure oil port (13), the first check valve The inlet of (7) is communicated with the first pressure oil port (12), the inlet of the second check valve (5) is communicated with the second pressure oil port (13), and the third check valve (8) The outlet is communicated with the first pressure oil port (12), the inlet of the third check valve (8) is communicated with the first working oil port (10), and the outlet of the fourth check valve (4) is communicated with the second The pressure oil port (13) communicates with each other, and the inlet of the fourth check valve (4) communicates with the second working oil port (11).
  2. 如权利要求1所述的双向调速液压阀组，其特征在于，所述第一压力油口(12)与主阀对应油口相连。The bidirectional speed regulating hydraulic valve group according to claim 1, wherein the first pressure oil port (12) is connected to the corresponding oil port of the main valve.
  3. 如权利要求1所述的双向调速液压阀组，其特征在于，所述第二压力油口(13)与主阀对应油口相连。The two-way speed regulating hydraulic valve group according to claim 1, wherein the second pressure oil port (13) is connected to the corresponding oil port of the main valve.
  4. 如权利要求1所述的双向调速液压阀组，其特征在于，所述回油口(9)与油箱相通。The two-way speed regulating hydraulic valve group according to claim 1, wherein the oil return port (9) communicates with the oil tank.
  5. 如权利要求1所述的双向调速液压阀组，其特征在于，所述第一工作油口(10)与油缸无杆腔相连。The bidirectional speed regulating hydraulic valve group according to claim 1, characterized in that, the first working oil port (10) is connected with the rodless cavity of the oil cylinder.
  6. 如权利要求1所述的双向调速液压阀组，其特征在于，所述第二工作油口(11)与油缸有杆腔相连。The bidirectional speed regulating hydraulic valve group according to claim 1, characterized in that, the second working oil port (11) is connected with the rod cavity of the oil cylinder.
PCT/CN2021/140651 2020-12-30 2021-12-23 Bidirectional speed-adjustment hydraulic valve group WO2022143357A1 (en)

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