Long-service-life hydraulic valve group with manual redundancy

Abstract

The long-service-life hydraulic valve set with the manual redundancy function comprises a valve block, an electromagnetic valve and a manual switch, a working oil port A, a working oil port B, an oil inlet P and an oil return port T are formed in the valve block, the working oil port A is communicated with the working oil port B through a working oil way, a main oil way I, a main oil way II and an oil return way are arranged in the valve block, and the main oil way I, the main oil way II and the oil return way are communicated with the electromagnetic valve. One end of the main oil way I and one end of the main oil way II are communicated with the oil inlet P respectively, the other end of the main oil way I is communicated with the working oil way through an oil branch I, and the other end of the main oil way II is communicated with the working oil way through an oil branch II. The pressure sensor is connected with a working oil way where the working oil port A and the working oil port B are located, and the manual switch is installed on the valve block. The valve bank is compact in structural layout, two main oil ways are designed and can work independently or simultaneously, control and adjustment are carried out through respective branches, and the requirements of various working conditions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve groups, in particular to a long-life hydraulic valve group with manual redundancy. Background Art

[0002] Hydraulic valve group is a commonly used hydraulic unit in hydraulic system. Hydraulic valve group generally integrates various valve components as a unit in the system and relies on the system for overall control. The hydraulic valve group on the market does not consider the manual pressure relief solution of the valve group in emergency or after failure of the valve group. Moreover, the hydraulic valve is a component of the valve group, which is the most frequently used and the most easily damaged. Once a hydraulic valve is damaged, the entire valve group will fail to work, or if the oil circuit is blocked, it will also cause system failure and damage to the valve components. In view of the above problems, a long-life hydraulic valve group with manual redundancy is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a long-life hydraulic valve group with manual redundancy. The valve group has a compact structure and layout, and is designed with two main oil circuits, which can work independently or simultaneously, and are controlled and adjusted through their respective branches to ensure various working conditions. When encountering an emergency, such as a failure of the solenoid valve or the overflow valve, or a blockage in the oil circuit, the manual switch is opened and the hydraulic valve group can quickly release pressure to ensure the safety of the system, extend the service life, and improve the service life, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life hydraulic valve group with manual redundancy, comprising a valve block, a solenoid valve and a manual switch, the valve block is provided with a working oil port A, a working oil port B, an oil inlet P port and an oil return T port, the working oil port A is connected with the working oil port B through a working oil circuit, the interior of the valve block is provided with a main oil circuit I, a main oil circuit II and an oil return circuit, one end of the main oil circuit I and the main oil circuit II are respectively connected with the oil inlet P port, the other end of the main oil circuit I is connected with the working oil circuit through an oil branch circuit I, and the other end of the main oil circuit II is connected with the working oil circuit through an oil branch circuit II, a pressure sensor is provided on the valve block, two pressure sensors are provided, and the pressure sensors are respectively connected to the working oil circuits where the working oil port A and the working oil port B are located, the manual switch is installed on the valve block, two valve blocks are provided, respectively provided on the working oil circuits where the working oil port A and the working oil port B are located, and solenoid valves are respectively provided on the main oil circuit I, the main oil circuit II, the oil branch circuit I and the oil branch circuit II.

[0005] Furthermore, the oil branch I includes the first oil branch I, the second oil branch I and the third oil branch I, and the first oil branch I, the second oil branch I and the third oil branch I are arranged in parallel, and the oil branch II includes the first oil branch II, the second oil branch II and the third oil branch II, and the first oil branch II, the second oil branch II and the third oil branch II are arranged in parallel.

[0006] Furthermore, solenoid valves are provided on the second oil branch I and the second oil branch II, and the oil inlet and outlet ports of the solenoid valves are connected in series with throttle valves and one-way valves, respectively. Overflow valves are provided on the third oil branch I and the third oil branch II, respectively.

[0007] Furthermore, the valve block is made of aluminum alloy.

[0008] Furthermore, the oil return circuit is connected in parallel between the third oil branch circuit I and the third oil branch circuit II, and the oil circuit communication portion inside the valve block is designed as an inclined hole.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The valve group has a compact structure and is designed with two main oil circuits, which can work independently or simultaneously. They are controlled and adjusted through their respective branches to ensure various working conditions. In case of emergency, such as failure of the solenoid valve or overflow valve, or blockage of the oil circuit, the manual switch is turned on and the hydraulic valve group can quickly release pressure to ensure the safety of the system, extend the service life and improve the service life.

[0011] 2. The oil circuit connecting part between valve parts is designed as an inclined hole, which can reduce the channel space, reduce the volume of the valve block, reduce the weight of the valve block, and reduce the number of process holes, thereby reducing the leakage points of the hydraulic valve group. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0013] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the appearance structure of the valve block of the utility model;

[0015] Figure 4 It is a schematic diagram of the partial cross-section structure of the valve block of the utility model;

[0016] Figure 5 It is a schematic diagram of the hydraulic principle diagram of the utility model.

[0017] In the figure: 1 valve block, 2 solenoid valve, 3 manual switch, 4 relief valve, 5 pressure sensor, 6 plug, 7 check valve, 8 throttle valve, 9 main oil circuit I, 10 main oil circuit II, 11 oil inlet P port, 12 oil return T port, 13 working oil port A, 14 working oil port B, 15 inclined hole, 16 return oil circuit, 17 working oil circuit, 211 first oil branch I, 212 second oil branch I, 213 third oil branch I, 221 first oil branch II, 222 second oil branch II, 223 third oil branch II. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] See also Figure 1-5The utility model provides a technical solution: a long-life hydraulic valve group with manual redundancy, including a valve block 1, a solenoid valve 2 and a manual switch 3. The valve block 1 is provided with a working oil port A13, a working oil port B14, an oil inlet P port 11 and an oil return T port 12, and other orifices are blocked with a plug 6. The material of the valve block 1 is an aluminum alloy material, which reduces the weight of the valve block 1 while ensuring the same performance. The working oil port A13 is connected with the working oil port B14 through a working oil circuit 17. The inside of the valve block 1 is provided with a main oil circuit I9, a main oil circuit II10 and an oil return circuit 16. One end of the main oil circuit I9 and the main oil circuit II10 are respectively connected with the oil inlet P port 11, and the other end of the main oil circuit I9 is ​​connected with the working oil circuit 17 through an oil branch circuit I, and the other end of the main oil circuit II10 is connected with the working oil circuit 17 through an oil branch circuit II. The two main oil circuits I9 and II10 can work separately or simultaneously through their respective branches. The valve block 1 is provided with a pressure sensor 5, and two pressure sensors 5 are provided. The pressure sensors 5 are connected to the working oil circuit 17 where the working oil port A13 and the working oil port B14 are located respectively. The manual switch 3 is installed on the valve block 1. Two valve blocks 1 are provided, which are respectively provided on the working oil circuit 17 where the working oil port A13 and the working oil port B14 are located. When the solenoid valve 2 and the relief valve 4 fail, or the oil circuit is blocked, the manual switch 3 is opened, and the main oil circuit can be quickly depressurized to ensure the safety of the system, and the damage to the valve block 1 caused by excessive pressure inside the valve group can be avoided. The manual switch 3 on the working oil port B14 side controls the rapid pressure relief of the main oil circuit 21. Similarly, the manual switch 3 on the working oil port A13 side controls the rapid pressure relief of the main oil circuit 22. The main oil circuit Ⅰ9, the main oil circuit Ⅱ10, the oil branch Ⅰ and the oil branch Ⅱ are respectively provided with a solenoid valve 2.

[0020] The oil branch I includes a first oil branch I211, a second oil branch I212 and a third oil branch I213, and the first oil branch I211, the second oil branch I212 and the third oil branch I213 are arranged in parallel, and the oil branch II includes a first oil branch II221, a second oil branch II222 and a third oil branch II223, and the first oil branch II221, the second oil branch II222 and the third oil branch II223 are arranged in parallel.

[0021] The second oil branch I 212 and the second oil branch II 222 are respectively provided with a solenoid valve 2, and the oil inlet and outlet of the solenoid valve 2 are respectively connected in series with a throttle valve 8 and a one-way valve 7. The solenoid valve 2 on the main oil circuit I 9 cooperates with the one-way valve 7 to control the oil inlet of the main oil circuit I 9. When the solenoid valve 2 is energized, the main oil circuit I 9 can pass oil to each internal oil branch through the oil inlet P port 11. Similarly, the solenoid valve of the oil branch I is also energized, and the oil branch I passes oil. The throttle valve 8 and the one-way valve 7 are set. The streamlined structure reduces the connection points and leakage points of the oil circuit, and improves the reliability and safety of the hydraulic valve group. The third oil branch I213 and the third oil branch II223 are respectively provided with overflow valves 4. When the pressure of the main oil circuit I9 exceeds the overflow pressure set by the overflow valve 4, the overflow valve 4 opens, and the excess oil flows from the third oil branch I213 through the overflow valve 4 and the return oil circuit 16 back to the return oil T port 12. When the oil circuit pressure is lower than the opening pressure of the overflow valve 4, the overflow valve 4 is closed.

[0022] The oil return circuit 16 is connected in parallel between the third oil branch I 213 and the third oil branch II 223. The oil circuit connecting part inside the valve block 1 is designed as an inclined hole 15, which can reduce the channel space, reduce the volume of the valve block 1, reduce the weight of the valve block 1, and reduce the number of process holes, thereby reducing the leakage points of the hydraulic valve group.

[0023] Working principle: oil is passed to the oil inlet P port 11. When the working oil port A13 needs to work, the solenoid valve 2 on the main oil circuit Ⅰ9 and the solenoid valve 2 on the second oil branch Ⅰ212 are powered off, and the oil enters the working oil port A13 through the main oil circuit 21 and the first oil branch Ⅰ211 to work. When the pressure of the main oil circuit Ⅰ9 exceeds the overflow pressure set by the overflow valve 4, the overflow valve 4 opens, and the excess oil returns to the return oil T port 12 from the third oil branch Ⅰ213 through the overflow valve 4 and the return oil circuit 16. After the oil circuit pressure is lower than the opening pressure of the overflow valve 4, the overflow valve 4 is closed. When the required working pressure is lower than the opening pressure set for the overflow valve 4, the solenoid valve 2 on the second oil branch Ⅰ212 is opened, and part of the oil pressure returns to the return oil T port 12 from the second oil branch Ⅰ212 through the return oil circuit 16. After adjusting to the required working pressure of the oil circuit, the solenoid valve 4 is closed.

[0024] The two main oil circuits Ⅰ9 and Ⅱ10 have the same working principle. Similarly, when the working oil port B14 needs to work, the solenoid valve 2 on the main oil circuit Ⅱ10 and the solenoid valve 2 on the second oil branch Ⅱ222 are powered off, and the oil enters the working oil port B14 through the main oil circuit Ⅱ10 and the first oil branch Ⅱ221 to work. When the pressure of the main oil circuit Ⅱ10 exceeds the overflow pressure set by the overflow valve 4, the overflow valve 4 opens, and the excess oil returns to the return oil T port 12 from the third oil branch Ⅱ223 through the overflow valve 4 and the return oil circuit 16. After the oil circuit pressure is lower than the opening pressure of the overflow valve 4, the overflow valve 4 is closed. When the required working pressure is lower than the opening pressure set by the overflow valve 4, the solenoid valve 2 on the second oil branch Ⅱ222 is opened, and part of the oil pressure returns to the return oil T port 12 from the second oil branch Ⅱ222 through the return oil circuit 16. After adjusting to the required working pressure of the oil circuit, the solenoid valve 2 is closed.

[0025] In case of emergency, such as failure of the solenoid valve 2 or the relief valve 4, or blockage of the oil circuit, the manual switch 3 is opened, and the hydraulic valve group can quickly release the pressure to ensure the safety of the system.

[0026] The two main oil circuits Ⅰ9 and Ⅱ10 can work independently or simultaneously, and can be controlled and adjusted through their respective branches to meet various working conditions.

[0027] Because it adopts modular design, the required valve components are integrated into a valve block 1, the structure is compact, thus saving space, and it is more convenient to assemble and maintain, and it can realize multiple functions and other advantages, and is widely used in hydraulic systems.

[0028] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A long-life hydraulic valve group with manual redundancy, comprising a valve block (1), a solenoid valve (2) and a manual switch (3), characterized in that: The valve block (1) is provided with a working oil port A (13), a working oil port B (14), an oil inlet P port (11) and an oil return T port (12). The working oil port A (13) is connected to the working oil port B (14) through a working oil passage (17). The valve block (1) is provided with a main oil passage I (9), a main oil passage II (10) and an oil return passage (16). One end of the main oil passage I (9) and the main oil passage II (10) are respectively connected to the oil inlet P port (11). The other end of the main oil passage I (9) is connected to the working oil passage (17) through an oil branch passage I. The other end of the main oil passage II (10) is connected to the working oil passage (17) through an oil branch passage Ⅱ is connected to the working oil circuit (17), a pressure sensor (5) is provided on the valve block (1), two pressure sensors (5) are provided, and the pressure sensors (5) are respectively connected to the working oil circuit (17) where the working oil port A (13) and the working oil port B (14) are located, a manual switch (3) is installed on the valve block (1), two valve blocks (1) are provided, and they are respectively provided on the working oil circuit (17) where the working oil port A (13) and the working oil port B (14) are located, and solenoid valves (2) are respectively provided on the main oil circuit I (9), the main oil circuit II (10), the oil branch circuit I and the oil branch circuit II.

2. A long-life hydraulic valve group with manual redundancy according to claim 1, characterized in that: The oil branch I includes a first oil branch I (211), a second oil branch I (212) and a third oil branch I (213), and the first oil branch I (211), the second oil branch I (212) and the third oil branch I (213) are arranged in parallel. The oil branch II includes a first oil branch II (221), a second oil branch II (222) and a third oil branch II (223), and the first oil branch II (221), the second oil branch II (222) and the third oil branch II (223) are arranged in parallel.

3. A long-life hydraulic valve group with manual redundancy according to claim 2, characterized in that: The second oil branch I (212) and the second oil branch II (222) are respectively provided with a solenoid valve (2), and the oil inlet and outlet ports of the solenoid valve (2) are respectively connected in series with a throttle valve (8) and a one-way valve (7). The third oil branch I (213) and the third oil branch II (223) are respectively provided with an overflow valve (4).

4. The long-life hydraulic valve group with manual redundancy according to claim 1, characterized in that: The valve block (1) is made of aluminum alloy.

5. The long-life hydraulic valve group with manual redundancy according to claim 2, characterized in that: The oil return path (16) is connected in parallel between the third oil branch path I (213) and the third oil branch path II (223), and the oil path connecting portion inside the valve block (1) is designed as an inclined hole (15).

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