Special robot vehicle control multi-way valve

Abstract

The utility model discloses a specialized robot vehicle control multi-way valve. The problem that the middle-position impact of an existing multi-way valve for the specialized robot vehicle is large is solved. The device comprises an oil inlet, an oil return port and a feedback oil way, the number of the working units is multiple, each working unit comprises a working valve element and a working oil port, and the oil inlet is connected with the working oil port through the working valve element; the oil inlet is connected with the working unit through the first unit; the first link comprises an anti-impact valve, the oil inlet is connected with the oil return port through the anti-impact valve, pressure oil of the oil inlet enters a control cavity of the anti-impact valve, and pressure oil of the feedback oil way enters a spring cavity of the anti-impact valve and is matched with elastic force in the spring cavity of the anti-impact valve to control an opening of the anti-impact valve. The utility model has the beneficial effects that the anti-impact valve is arranged, so that pressure oil in the valve can be drained at low pressure through the anti-impact valve when the anti-impact valve is in the middle position, the system impact is reduced, and the product adaptation range is wide.

Description

Technical Field

[0001] The utility model relates to a multi-way valve, in particular to a multi-way valve for controlling a special robot vehicle. Background Technique

[0002] With the rapid development of special robot unmanned vehicles, the application scenarios are increasing. The application of special robot unmanned vehicles not only improves work efficiency, but also ensures the safety of operators to a certain extent. With the continuous progress of technology, the application fields of special robot vehicles will be further expanded, providing strong support for people to complete tasks in harsh, dangerous or complex environments.

[0003] At present, most domestic special robot unmanned vehicles adopt imported electro-hydraulic proportional flow control valves, which mainly have several problems: on the one hand, using proportional solenoid valves to control each structure, the import price is high and the cycle is long; on the other hand, when the spool of the proportional solenoid valve quickly returns to the middle position, the instantaneous pressure impact in the pipeline from the pump outlet to the valve is relatively large; third, the compound action effect is poor. Due to the long cycle and high price of imported valves, and the imported valves are standard proportional electro-hydraulic flow control valves and are not willing to make detailed modifications and matching designs according to the working conditions of specific models, various conditions have restricted the delivery of product orders from the main engine factory to users on time. Summary of the Utility Model

[0004] To solve the problems of large impact in the middle position and troublesome procurement of the existing multi-way valve for special robot vehicles in the background technique, the utility model provides a multi-way valve for controlling a special robot vehicle.

[0005] The technical solution of the utility model is: a multi-way valve for controlling a special robot vehicle, including an oil inlet, an oil return port and a feedback oil circuit, and further including:

[0006] Working joints, there are multiple working joints, each working joint includes a working spool and a working oil port, and the oil inlet is connected to the working oil port through the working spool;

[0007] The first joint, the oil inlet is connected to the working joint through the first joint; the first joint includes an anti-impact valve, the oil inlet is connected to the oil return port through the anti-impact valve, and the pressure oil at the oil inlet enters the control cavity of the anti-impact valve, and the pressure oil in the feedback oil circuit enters the spring cavity of the anti-impact valve and cooperates with the elastic force in the spring cavity of the anti-impact valve to control the opening of the anti-impact valve.

[0008] As a further improvement of the utility model, it further includes a first damper, which is arranged between the spring cavity of the anti-impact valve and the oil return port, and is used to avoid system whistling when the working spool is closed.

[0009] As a further improvement of the present utility model, it further includes a pressure compensator, which is arranged between the oil outlet of the working spool and the working oil port, and is used to achieve post-valve pressure compensation.

[0010] As a further improvement of the present utility model, it further includes a second damper, which is arranged between the pressure compensator and the oil return port, and is used to avoid system jitter.

[0011] As a further improvement of the present utility model, it further includes a constant flow valve, which is arranged between the feedback oil circuit and the oil return port, and is used for constant flow oil discharge.

[0012] As a further improvement of the present utility model, it further includes a back pressure check valve, which is arranged in front of the oil return port, and is used to provide back pressure for the oil return to improve the operation stability.

[0013] As a further improvement of the present utility model, it further includes a relief valve, and the relief valve is arranged between the feedback oil circuit and the oil return port, and is used to improve the system safety.

[0014] As a further improvement of the present utility model, it further includes a third damper, which is arranged on the shock-proof valve and before the pressure oil at the oil inlet enters the control chamber of the shock-proof valve.

[0015] As a further improvement of the present utility model, the working spool is directly driven to change direction by an electromagnetic valve.

[0016] As a further improvement of the present utility model, there are multiple working units and they are arranged in a sheet form, and different working units are detachably connected.

[0017] The beneficial effects of the present utility model are that a shock-proof valve is provided. When in the middle position, the pressure oil in the valve can be discharged through the shock-proof valve at low pressure, reducing system shock and making the product suitable for a wide range. The present utility model also has the advantages of simple structure, convenient assembly, reliable operation, long service life, etc. Description of the Drawings

[0018] Attached Figure 1 is a schematic hydraulic principle diagram of an embodiment of the present utility model.

[0019] Attached Figure 2 is a schematic hydraulic principle diagram of the first unit of an embodiment of the present utility model.

[0020] In the figure, 1. working unit; 11. working spool; 12. working oil port; 13. pressure compensator; 2. first unit; 21. shock-proof valve; 22. first damper; 23. second damper; 24. constant flow valve; 25. back pressure check valve; 26. relief valve; 27. third damper; P. oil inlet; T. oil return port; LS. feedback oil circuit. Detailed Embodiments

[0021] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings:

[0022] As Figure 1 combined with Figure 2 shown, a special robot vehicle control multi-way valve includes an oil inlet P, an oil return port T, and a feedback oil circuit LS, and further includes:

[0023] Working joint 1, there are multiple working joints 1, each working joint 1 includes a working spool 11 and a working oil port 12, and the oil inlet P is connected to the working oil port 12 through the working spool 11;

[0024] The first joint 2, the oil inlet P is connected to the working joint 1 through the first joint 2; the first joint 2 includes an anti-shock valve 21, the oil inlet P is connected to the oil return port T through the anti-shock valve 21, the pressure oil at the oil inlet P enters the control cavity of the anti-shock valve 21, and the pressure oil in the feedback oil circuit LS enters the spring cavity of the anti-shock valve 21 and cooperates with the elastic force in the spring cavity of the anti-shock valve 21 to control the opening of the anti-shock valve. The beneficial effect of the present utility model is that an anti-shock valve is provided. When in the middle position, the pressure oil in the valve can be discharged through the anti-shock valve at low pressure, reducing system shock and making the product have a wide adaptability range. The present utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life. The present invention discloses a new type of control multi-way valve, which is a plate-type structure 7-way valve, and the number of working joints can be increased or decreased according to specific product requirements. The inlet joint is equipped with an anti-shock valve, an oil return check valve, a load protection relief valve, and a constant flow valve. The pump oil source can be configured with a fixed-displacement pump or a variable-displacement pump. Specifically, this multi-way valve is of a plate-type structure and can be a plate-type 7-way valve. These working joints can be connected to the boom cylinder, turntable rotation, jaw motor, jaw cylinder, stick cylinder, outrigger cylinder, bucket cylinder, etc. Of course, the number of working joints can be increased or decreased according to specific product requirements. The pump oil source can be configured with a fixed-displacement pump or a variable-displacement pump. When connected to a fixed-displacement pump, the anti-shock valve is set at a relatively low pressure (about 14 bar) and used as a three-way flow valve to ensure a constant pressure difference between the outlet of the fixed-displacement pump and the load. When not working, it unloads at low pressure; when connected to a variable-displacement pump, the anti-shock valve is set at a pressure slightly higher than the pressure difference valve of the load-sensitive pump (about 30 bar - 35 bar). After the working spool quickly returns to the middle position in the working joint, the pressure oil at port P is sealed. The pump variable mechanism requires a response time. According to tests, it is found that by setting the anti-shock valve, the pressure peak value from the pump outlet to the working valve can be eliminated, hydraulic shock can be eliminated, and the service life of the pump and valve can be extended.

[0025] The present utility model further includes a first damper 22, which is arranged between the spring cavity of the anti-shock valve 21 and the oil return port T, and is used to avoid system whistling when the working spool 11 is closed. Without the first damper, when closing, the spring cavity of the anti-shock valve quickly discharges oil, the system will whistle, damage the system and components, and affect the service life.

[0026] The utility model further includes a pressure compensator 13, which is arranged between the oil outlet of the working spool 11 and the working oil port 12 and is used to realize post-valve pressure compensation. By using the post-valve compensation technology, rapid and precise control can be achieved for each control mechanism, improving the smoothness and reliability of the overall machine operation.

[0027] The utility model further includes a second damper 23, which is arranged between the pressure compensator 13 and the oil return port T and is used to avoid system jitter. The setting of the second damper stabilizes the system. If the second damper is too large, the pressure difference will become smaller, and the flow rate from the oil inlet to the working oil port will become smaller. Without the second damper, jitter will occur.

[0028] The utility model further includes a constant flow valve 24, which is arranged between the feedback oil circuit LS and the oil return port T and is used for constant flow oil discharge. The setting of the constant flow valve makes the feedback oil circuit stable and reduces the impact. The first-stage integrated bridge circuit composed of the constant flow valve, the first damper, and the second damper can be designed according to the vehicle working conditions, and the dynamic response effect of the working structure movement is better, realizing precise control.

[0029] The utility model further includes a back pressure check valve 25, which is arranged in front of the oil return port T and is used to provide back pressure for the oil return to improve the smoothness of the movement. Providing back pressure for the oil return ensures that the system does not suck air and improves the smoothness of the movement.

[0030] The utility model further includes a relief valve 26, which is arranged between the feedback oil circuit LS and the oil return port T and is used to improve the safety of the system. The setting of the relief valve makes the system safer.

[0031] The utility model further includes a third damper 27, which is arranged on the shock-proof valve 21 and before the pressure oil at the oil inlet P enters the control cavity of the shock-proof valve 21. Specifically, the working spool 11 is directly driven to change direction by an electromagnetic valve. Specifically, there are multiple working units 1 and they are arranged in a laminated manner, and different working units 1 are detachably connected. By utilizing the high response characteristics of direct drive by the electromagnetic valve, the valve stem is directly driven to change direction by the electromagnetic valve, and combined with the post-valve compensation technology, rapid and precise control can be achieved for each control mechanism, improving the smoothness and reliability of the overall machine operation. The throttle grooves of the valve stems of each working unit are perfectly matched with the actual working conditions, effectively ensuring the reliability of the combined movement of the overall machine. Using electromagnetic direct drive for commutation has a greater cost advantage (cost reduction of 60%) compared with imported proportional electromagnetic valve commutation, and has higher economy.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0034] All technicians should note that although the present utility model has been described according to the above specific embodiments, the inventive concept of the present utility model is not limited to this utility model only. Any modification using the inventive concept of the present utility model will be included in the scope of protection of the patent right of the present utility model.

Claims

1. A special robot vehicle control multi-way valve, including an oil inlet (P), an oil return port (T) and a feedback oil circuit (LS), characterized in that Also included: A working joint (1), wherein there are a plurality of working joints (1), each of which comprises a working valve core (11) and a working oil port (12), and the oil inlet (P) is connected to the working oil port (12) via the working valve core (11); The first joint (2), the oil inlet (P) is connected to the working joint (1) through the first joint (2); the first joint (2) includes an anti-shock valve (21), the oil inlet (P) is connected to the oil return port (T) through the anti-shock valve (21), the pressure oil of the oil inlet (P) enters the control chamber of the anti-shock valve (21), the pressure oil of the feedback oil circuit (LS) enters the spring chamber of the anti-shock valve (21), and the elastic force in the spring chamber of the anti-shock valve (21) cooperates with each other to control the opening of the anti-shock valve.

2. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes a first damper (22) disposed between the spring chamber of the anti-shock valve (21) and the oil return port (T) and used to prevent system howling when the working valve core (11) is closed.

3. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes a pressure compensator (13), which is arranged between the oil outlet of the working valve core (11) and the working oil port (12) and is used to achieve post-valve pressure compensation.

4. A special robot vehicle control multi-way valve according to claim 2, characterized in that It also includes a second damper (23) which is arranged between the pressure compensator (13) and the oil return port (T) and is used to prevent system vibration.

5. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes a constant flow valve (24), which is arranged between the feedback oil circuit (LS) and the oil return port (T) and is used for constant flow oil leakage.

6. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes a back pressure check valve (25) which is arranged in front of the oil return port (T) and is used to provide oil return back pressure to improve the movement stability.

7. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes an overflow valve (26), which is arranged between the feedback oil circuit (LS) and the oil return port (T) to improve system safety.

8. A special robot vehicle control multi-way valve according to claim 1, characterized in that It also includes a third damper (27) which is arranged on the anti-shock valve (21) and before the pressure oil at the oil inlet (P) enters the control chamber of the anti-shock valve (21).

9. A special robot vehicle control multi-way valve according to claim 1, characterized in that The working valve core (11) is directly driven by the electromagnetic valve to switch direction.

10. A special robot vehicle control multi-way valve according to claim 1, characterized in that The working links (1) are multiple and are arranged in a sheet-like manner, and different working links (1) can be detachably connected.

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