Multifunctional plate type valve

Abstract

The utility model discloses a multifunctional plate type valve which comprises an oil inlet valve body, a manual control main valve, an electric control main valve body and a multifunctional valve set which are sequentially connected. An electric proportional pressure reducing valve is arranged on the electric control main valve body; and a three-position four-way plate valve, a pilot oil pressure reducing valve and two bidirectional stop electric control valves are arranged on the multifunctional valve group. When in use, the device is more functional, and is very simple to operate and high in practicability.

Description

Technical Field

[0001] The utility model relates to the field of reversing valves, in particular to a multi-functional chip valve. Background Art

[0002] At present, a manual floating position control mechanism is generally adopted in the hydraulic transmission system device of tractors on the market. Although it can meet the actual working conditions, it is time-consuming and laborious in operation, and it is all mechanical structures. In extreme environments such as long-term operation, intense bumps, and continuous high temperatures of tractors, the mechanical structures are prone to damage, and thus the functions are successively damaged. In the actual use process, customers prefer electrical control and improvement of functions.

[0003] Therefore, it is necessary to develop a new type of control valve specifically to improve functionality and practicality. Summary of the Utility Model

[0004] Purpose of the utility model: Aiming at the deficiencies and defects of the prior art, the utility model provides a multi-functional chip valve, which is more functional in use, very simple to operate, and has high practicality.

[0005] Technical solution: A multi-functional chip valve of the utility model is characterized in that it comprises an oil inlet valve body, a manual control main valve, an electric control main valve body and a multi-functional valve group connected in sequence; an electro-hydraulic proportional pressure reducing valve is arranged on the electric control main valve body; a three-position four-way plate valve, a pilot oil pressure reducing valve and two two-way cut-off electro-control valves are arranged on the multi-functional valve group.

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

[0007] Wherein, the manual control main valve reverses the oil body through a valve core.

[0008] Wherein, the pilot oil pressure reducing valve on the multi-functional valve group is connected to the electro-hydraulic proportional pressure reducing valve.

[0009] Wherein, the two-way cut-off electro-control valve is a zero-leakage two-way cut-off electro-control valve.

[0010] Wherein, the two-way cut-off electro-control valve and the three-position four-way plate valve are located inside the multi-functional valve group.

[0011] Wherein, the electro-hydraulic proportional pressure reducing valve is located inside the electric control main valve body.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following remarkable advantages: The multifunctional chip valve of the utility model is more functional and very easy to operate. An electric control main valve body assembly and a zero-leakage two-way cut-off electric control valve are added on the original basis. It can not only achieve the function of a hydraulic lock to keep the actuator in its original position, but also control the operation of the multi-way valve through electricity. Moreover, through the different operations of two zero-leakage two-way cut-off electric control valves, an energy-saving effect can be achieved. Integrating three complex functions into one multi-way valve can not only achieve the performance of the original ordinary proportional valve, but also has various functions, which is more convenient for customers to choose. It can not only achieve the performance required by an ordinary multi-way valve, but also includes a zero-leakage function, an energy-saving function, an electric control function, and a manual function in its structure. The structure is compact and convenient for processing. More importantly, it has various functions and is easy to operate. Brief Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the utility model;

[0014] Figure 2 is a schematic side view structural diagram of the utility model;

[0015] Figure 3 is a hydraulic schematic diagram of the utility model;

[0016] In the figure, 1 is an oil inlet valve body; 2 is a manual control main valve; 3 is an electric control main valve body; 4 is a multifunctional valve group; 5 is a two-way cut-off electric control valve; 6 is a three-position four-way plate valve; 7 is a pilot oil pressure reducing valve; 8 is an electro-hydraulic proportional pressure reducing valve. Detailed Embodiment

[0017] The technical solution of the utility model will be further described below in conjunction with the drawings and the detailed embodiment.

[0018] The multifunctional chip valve of the utility model includes an oil inlet valve body 1, a manual control main valve 2, an electric control main valve body 3, and a multifunctional valve group 4 that are connected in sequence; an electro-hydraulic proportional pressure reducing valve 8 is provided on the electric control main valve body 3; a three-position four-way plate valve 6, a pilot oil pressure reducing valve 7, and 2 two-way cut-off electric control valves 5 are provided on the multifunctional valve group 4. Among them, the P port of the oil inlet valve body 1 is connected to an external oil inlet pipe body. The manual control main valve 2 performs oil body commutation through a valve core. The pilot oil pressure reducing valve 7 on the multifunctional valve group 4 is connected to the electro-hydraulic proportional pressure reducing valve 8. The two-way cut-off electric control valve 5 is a zero-leakage two-way cut-off electric control valve. The two-way cut-off electric control valve 5 and the three-position four-way plate valve 6 are located inside the multifunctional valve group 4. The electro-hydraulic proportional pressure reducing valve 8 is located inside the electric control main valve body 3.

[0019] During operation, when the oil enters from the P port on the inlet valve body 1 and enters the manual control main valve body 2, it can work by changing the direction of the spool on the manual control main valve 2; when the oil enters the electric control main valve body 3, the hydraulic pressure is reduced to 2 MPa after passing through the pilot oil pressure reducing valve 7 on the multi-functional valve group 4 and then reaches the electro-hydraulic proportional pressure reducing valve 8 on the electric control main valve body 3, and the work of the electric control main valve body 3 is controlled through electro-hydraulic proportional pressure reduction; when the oil enters the multi-functional valve group 4, the three-position four-way plate valve 6 above controls the work of the multi-functional valve group 4, and the two zero-leakage two-way cut-off electro-control valves 5 on the multi-functional valve group 4 play a pressure-holding function for the working oil ports, that is, the working components connected to the two-way cut-off electro-control valve 5 can ensure working at a fixed position; when one of these two zero-leakage cut-off valves 5 works, it can also achieve the effect of energy saving, that is, when the working components connected to it do not need to work at high speed, one of them can be made to work to achieve the effect of energy saving.

[0020] The multi-functional multi-way valve of the present utility model can achieve manual control, electro-control, zero leakage, and energy-saving functions, and realizes a multi-functional control scheme:

[0021] 1. Manual control: The oil exits from the pump and enters the manual control main valve body. The spool moves through an external force to control the work of the manual main valve body.

[0022] 2. Electro-control: The oil exits from the pump and enters the electro-control main valve body, then enters the pilot oil pressure reducing valve on the multi-functional valve group, and after the pressure is reduced to 2 MPa, it enters the electro-hydraulic proportional pressure reducing valve on the electro-control main valve body. The pilot oil output from the electro-hydraulic proportional pressure reducing valve pushes the spool to move, thereby controlling the work of the electro-control main valve body.

[0023] 3. Zero leakage control: It is mainly that the two-way cut-off electro-control valve is installed on the multi-functional valve group. It is mainly connected to the oil cylinder to control the rise and fall of the oil cylinder. The oil exits from the pump and enters the oil cylinder through the two-way cut-off electro-control valve, causing the oil cylinder to rise. When the oil cylinder rises to a certain position, the pump needs to stop supplying oil. At this time, the two-way cut-off electro-control valve plays a locking role, making the oil cylinder unable to descend. When it is necessary to descend, it can descend only by energizing the two-way cut-off electro-control valve again.

[0024] 4. Improvement of energy-saving effect: It is mainly to add two two-way cut-off electro-control valves on the multi-functional valve group. When the rising speed of the oil cylinder does not need to be increased, only one of the two-way cut-off electro-control valves needs to be energized to reduce the speed. If you want to increase the speed, you can open the two two-way cut-off valves at the same time to increase the speed. In this way, the effect of energy saving can be achieved.

Claims

1. A multifunctional disc valve, characterized in that: The invention comprises an oil inlet valve body (1), a manually controlled main valve (2), an electrically controlled main valve body (3) and a multifunctional valve group (4) which are connected in sequence; the electrically controlled main valve body (3) is provided with an electric proportional pressure reducing valve (8); the multifunctional valve group (4) is provided with a three-position four-way plate valve (6), a pilot oil pressure reducing valve (7) and two two-way cut-off electrically controlled valves (5).

2. The multifunctional disc valve according to claim 1, characterized in that: The P port of the oil inlet valve body (1) is connected to an external oil inlet pipe body.

3. The multifunctional disc valve according to claim 1, characterized in that: The manually controlled main valve (2) switches the direction of the oil body through the valve core.

4. The multifunctional disc valve according to claim 1, characterized in that: The pilot oil pressure reducing valve (7) on the multifunctional valve group (4) is connected to the electric proportional pressure reducing valve (8).

5. The multifunctional disc valve according to claim 1, characterized in that: The two-way cut-off electric-controlled valve (5) is a zero-leakage two-way cut-off electric-controlled valve.

6. The multifunctional plate valve according to claim 1, characterized in that: The two-way cut-off electric control valve (5) and the three-position four-way plate valve (6) are located inside the multifunctional valve group (4).

7. The multifunctional disc valve according to claim 1, characterized in that: The electric proportional pressure reducing valve (8) is located inside the electric control main valve body (3).

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