Electric control multi-way valve with flow dividing function and pressure maintaining function

Abstract

The utility model discloses an electric control multi-way valve with a flow dividing function and a pressure maintaining function. The electric control multi-way valve comprises an oil inlet valve body, a main valve body and an oil return valve body which are sequentially connected. A diverter valve is arranged on the oil inlet valve body; a valve element is arranged in the main valve body, and the main valve body is provided with a hydraulic lock valve block, a hydraulic lock and a hydraulic lock valve element. According to the utility model, the self-locking function, the shunting function and the floating position function are integrated in one piece valve, so that the performance of the original common proportional valve can be achieved, the functions are diversified, and the selection of customers is more convenient.

Description

Technical Field

[0001] The utility model relates to a control valve, in particular to an electrically controlled multi-way valve with a flow dividing function and a pressure maintaining function. Background Art

[0002] At present, the hydraulic transmission system of tractors on the market generally adopts manual floating position control mechanism. Although there are some studies on the problem of operating force, due to the particularity of tractor operation, the working stability of the hydraulic control mechanism in extreme environments such as long-term operation, intense bumps, and continuous high temperature and the operational sensitivity in the centralized control process of multiple actuators are quite high. In actual use, the overflow valve and valve core of the valve have high requirements, and ordinary reversing valves cannot meet the use needs.

[0003] Therefore, it is necessary to develop a new type of electrically controlled multi-way valve to overcome the defects of the existing reversing valve. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the prior art, the utility model provides an electrically controlled multi-way valve with a diversion function and a pressure maintaining function, which integrates the three functions of self-locking function, diversion function and floating position function into one valve, which can not only achieve the performance of the original ordinary proportional valve, but also has diverse functions, which is more convenient for customers to choose.

[0005] Technical solution: The utility model is an electrically controlled multi-way valve with a diversion function and a pressure maintaining function, characterized in that it includes an oil inlet valve body, a main valve body and an oil return valve body connected in sequence; a diverter valve is provided on the oil inlet valve body; a valve core is provided inside the main valve body, and the main valve body is provided with a hydraulic lock valve block, a hydraulic lock and a hydraulic lock valve core.

[0006] Wherein, the P port of the oil inlet valve body is connected to the external oil inlet pipe body.

[0007] Wherein, the oil inlet valve body, the main valve body and the oil return valve body are fixed by bolts.

[0008] Wherein, the diverter valve is inserted into the oil inlet valve body.

[0009] The diverter valve divides the oil entering the P port of the oil inlet valve body into two.

[0010] Wherein, the hydraulic lock valve block is fixed on the main valve body.

[0011] Wherein, the hydraulic lock and the hydraulic lock valve core are inserted into the hydraulic lock valve block.

[0012] Working principle: When the internal pilot oil pushes the spool to the rising position, the oil flows out of the pump. After entering the P port of the inlet valve body, it first enters the flow dividing valve of the inlet valve body. After providing sufficient flow to the working joint spool, it enters the hydraulic lock valve block from the spool, opens the hydraulic lock, and makes the oil cylinder rise. When the oil cylinder reaches a certain position, the supply of pilot oil stops. Due to the hydraulic lock, the oil in the oil cylinder cannot return to the fuel tank, achieving a self-locking effect. The excess flow will be supplied from the P1 port of the inlet valve body to the other control components, providing a power source for the other control components. When the pilot oil enters from the other side, the oil flows out of the pump. After entering the P port of the inlet valve body, it first enters the flow dividing valve of the inlet valve body. After providing sufficient flow to the working joint spool, it pushes the spool to make the oil enter the descending port of the oil cylinder, and at the same time pushes the hydraulic lock spool to open the hydraulic lock, making the oil cylinder start to descend. The excess flow will be supplied from the P1 port of the inlet valve body to the other control components, providing a power source for the other control components.

[0013] Beneficial effects: Compared with the prior art, the present utility model has the following remarkable advantages: The present utility model adds a flow dividing valve and a hydraulic lock position on the basis of the existing ordinary reversing valve. It can not only achieve the function of the hydraulic lock and keep the actuator in its original position, but also add a flow dividing valve on the inlet valve body. It can not only always stabilize the flow of all working joints at the same flow rate, but also supply the excess flow to other control components, thereby reducing the output power source of the entire system. The present utility model integrates three complex functions in one valve. It can not only achieve the performance of the original ordinary proportional valve, but also has diverse functions, which is more convenient for customers to choose. Description of the drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a top view structural schematic diagram of the present utility model;

[0016] In the figure, 1 is the inlet valve body; 2 is the main valve body; 3 is the return oil valve body; 4 is the spool; 5 is the hydraulic lock valve block; 6 is the hydraulic lock; 7 is the hydraulic lock spool; 8 is the flow dividing valve. Specific implementation manners

[0017] The technical solution of the present utility model will be further described below in conjunction with the drawings and specific implementation manners.

[0018] The electro-control multi-way valve with a flow splitting function and a pressure maintaining function of the present utility model includes an oil inlet valve body 1, a main valve body 2 and an oil return valve body 3 which are connected in sequence; a flow splitting valve 8 is provided on the oil inlet valve body 1; a valve core 4 is arranged inside the main valve body 2, and a hydraulic lock valve block 5, a hydraulic lock 6 and a hydraulic lock valve core 7 are provided on the main valve body 2. Among them, the P port of the oil inlet valve body 1 is connected to an external oil inlet pipe body. The oil inlet valve body 1, the main valve body 2 and the oil return valve body 3 are fixed by bolts to achieve the internal circulation effect of the oil fluid. The flow splitting valve 8 is inserted on the oil inlet valve body 1 to achieve the flow splitting function. The flow splitting valve 8 divides the oil fluid entering from the P port of the oil inlet valve body 1 into two parts. The hydraulic lock valve block 5 is fixed on the main valve body 2. The hydraulic lock 6 and the hydraulic lock valve core 7 are inserted on the hydraulic lock valve block 5 to achieve the pressure maintaining function.

[0019] During operation, the oil fluid enters from the P port on the oil inlet valve body 1. After the pilot oil pushes the valve core 4, the oil fluid passes through the valve core 4 and then enters the hydraulic lock valve block 5. After the first hydraulic lock 6 is opened, the control oil fluid reaches the working oil port. At the same time, the hydraulic lock valve core 7 pushes open the second hydraulic lock 6, so that the oil of the actuator returns to the fuel tank. When the valve core 4 changes direction, the oil fluid enters from the P port on the oil inlet valve body 1. After the pilot oil pushes the valve core 4, the oil fluid passes through the valve core 4 and then enters the hydraulic lock valve block 5 to open the second hydraulic lock 6, the control oil fluid reaches the working oil port. At the same time, the hydraulic lock valve core 7 pushes open the second hydraulic lock 6, so that the oil of the actuator returns to the fuel tank. At the same time, the oil inlet valve body 1 has a flow splitting function. The oil fluid enters from the P port on the oil inlet valve body 1, and the oil fluid is divided into two parts by the flow splitting valve 8. The flow rate required by the actuator is supplied to the valve core 4 on the main valve body 2 for the pressure maintaining function test. The remaining flow rate is supplied to the work of other control components.

[0020] The present utility model adds a flow splitting valve 8 on the oil inlet valve body 1 to achieve the flow splitting function; the oil inlet valve body 1, the main valve body 2 and the oil return valve body 3 are tightened by three bolts to achieve the internal circulation effect of the oil fluid. A hydraulic lock valve block 5, a hydraulic lock 6 and a hydraulic lock valve core 7 are added on the main valve body 2 to achieve the pressure maintaining function; a valve core 4 is added inside the main valve body 2 to achieve the function of the main valve body 2 working at different oil ports; the main function of the pilot oil is to increase the pressure required for electro-control, so that the valve core 4 realizes the movement inside the main valve body 2, thereby realizing the work of different oil ports of the main valve body 2.

[0021] On the premise of a common plate multi-way valve, the present utility model adds a hydraulic lock and a floating position of the valve core to the conventional main valve body, and adds a flow splitting function to the oil inlet valve body. Through this solution, not only can the performance of the original ordinary plate multi-way valve be achieved, but also the function is diverse. It is more convenient for customers to select models, thereby improving the functionality and practicality of the proportional valve. It has the advantages of reasonable design, convenient use, sensitive operation, high functionality and high temperature resistance.

Claims

1. An electronically controlled multi-way valve with a flow splitting function and a pressure holding function, characterized in that: It includes an oil inlet valve body (1), a main valve body (2) and an oil return valve body (3) connected in sequence; a flow dividing valve (8) is provided on the oil inlet valve body (1); a valve core (4) is arranged inside the main valve body (2), and the main valve body (2) is provided with a hydraulic lock valve block (5), a hydraulic lock (6) and a hydraulic lock valve core (7).

2. The electronically controlled multi-way valve with a flow splitting function and a pressure maintaining function according to claim 1, wherein: The P port of the oil inlet valve body (1) is connected to an external oil inlet pipe body.

3. The electronically controlled multi-way valve with a flow splitting function and a pressure maintaining function according to claim 1, characterized in that: The oil inlet valve body (1), the main valve body (2) and the oil return valve body (3) are fixed by bolts.

4. The electronically controlled multi-way valve with a flow splitting function and a pressure holding function according to claim 1, characterized in that: The flow dividing valve (8) is inserted into the oil inlet valve body (1).

5. The electronically controlled multi-way valve with a flow splitting function and a pressure maintaining function according to claim 4, characterized in that: The flow dividing valve (8) divides the oil flowing into the P port of the oil inlet valve body (1) into two parts.

6. The electronically controlled multi-way valve with a flow splitting function and a pressure holding function according to claim 1, characterized in that: The hydraulic lock valve block (5) is fixed on the main valve body (2).

7. The electronically controlled multi-way valve with a flow splitting function and a pressure holding function according to claim 6, characterized in that: The hydraulic lock (6) and the hydraulic lock valve core (7) are inserted into the hydraulic lock valve block (5).

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