Valve bank structure of hydraulic control system
By designing a valve group structure of a hydraulic control system with a variety of hydraulic oil circuits and solenoid valves, the problem that the existing agricultural machinery hydraulic system cannot effectively utilize all working mechanisms is solved, flexible control of the oil cylinder and stable oil circuit pressure are achieved, and the efficiency and flexibility of the hydraulic system are improved.
Patent Information
- Application Number
- CN202420418812.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The hydraulic system valve group structure of existing agricultural machinery cannot effectively utilize all working mechanisms, resulting in the need to design specific hydraulic systems for different working mechanisms.
A valve group structure of a hydraulic control system is designed, including a first hydraulic oil circuit, a second hydraulic oil circuit, a three-position four-way solenoid valve, a throttling check valve, a two-position two-way solenoid valve and a relief valve. These components are used to achieve the rise, stop and fall of the oil cylinder, ensuring the stability of the oil circuit pressure and achieving throttling and return oil.
It realizes flexible control of the oil cylinder, ensures stable oil circuit pressure, and realizes throttling reduction through the throttling check valve, improving the efficiency and flexibility of the hydraulic system.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to a valve group structure of a hydraulic control system. Background Art
[0002] Agricultural machinery refers to various machines used in the production process of crop planting and animal husbandry, as well as in the primary processing and treatment of agricultural and animal products. Agricultural machinery includes agricultural power machinery, farmland construction machinery, soil tillage machinery, planting and fertilization machinery, plant protection machinery, farmland irrigation and drainage machinery, crop harvesting machinery, agricultural product processing machinery, animal husbandry machinery and agricultural transport machinery.
[0003] Agricultural machinery generally controls the movement of working mechanisms through hydraulic systems, but the existing valve group structure cannot use all working mechanisms, so specific hydraulic systems need to be designed for different working mechanisms. Utility Model Content
[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a valve group structure for a hydraulic control system.
[0005] A valve group structure of a hydraulic control system includes a first hydraulic oil circuit and a second hydraulic oil circuit. One ends of the first hydraulic oil circuit and the second hydraulic oil circuit are respectively connected to the rodless chamber and the rod chamber of the oil cylinder, and the other ends are respectively connected to the working oil ports of the three-position four-way solenoid valve. The three-position four-way solenoid valve is respectively connected to the hydraulic source and the return oil tank. The three-position four-way solenoid valve includes a normally open left position, a normally closed middle position, and an externally controlled and internally leaked right position. The two working oil ports of the right position are both connected to the return oil port of the solenoid valve.
[0006] In order to achieve throttling oil return, a throttling one-way valve is provided on the first hydraulic oil circuit.
[0007] In order to ensure the oil circuit pressure, a two-position two-way solenoid valve is provided between the hydraulic source and the oil return tank. The two-position two-way solenoid valve includes a normally open position and a normally closed position. The two-position two-way solenoid valve acts as a throttle valve.
[0008] In order to prevent excessive oil circuit pressure, an overflow valve is installed between the hydraulic source and the return oil tank.
[0009] Beneficial effect: Compared with the prior art, the utility model is composed of a three-position four-way reversing valve, a two-position two-way reversing valve and an overflow valve to realize the oil cylinder rising, that is, the left position of the three-position four-way solenoid valve, the oil cylinder stopping, that is, the middle position of the three-position four-way solenoid valve, the oil cylinder descending and in the descending position, that is, the right position of the three-position four-way solenoid valve, the rod chamber and the rodless chamber of the oil cylinder are connected and the return oil is connected, and when descending, it descends by the dead weight of the load, and the oil hole of the oil cylinder is equipped with a one-way throttle valve to realize throttling descent. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1It is a schematic diagram of the valve group structure of a hydraulic control system;
[0011] In the figure, 1, the first hydraulic oil circuit, 2, the oil cylinder, 3, the throttling check valve, 4, the second hydraulic oil circuit, 5, the three-position four-way solenoid valve, 6, the two-position two-way solenoid valve, 7, the overflow valve, 8, the return oil tank, and 9, the hydraulic source. DETAILED DESCRIPTION
[0012] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0013] like Figure 1 As shown, the first hydraulic oil circuit 1, the oil cylinder 2, the throttling check valve 3, the second hydraulic oil circuit 4, the three-position four-way solenoid valve 5, the two-position two-way solenoid valve 6, the overflow valve 7, the oil return tank 8, and the hydraulic source 9;
[0014] A valve group structure of a hydraulic control system includes a first hydraulic oil circuit 1 and a second hydraulic oil circuit 4. One ends of the first hydraulic oil circuit 1 and the second hydraulic oil circuit 4 are respectively connected to the rodless chamber and the rod chamber of the oil cylinder 2, and the other ends are respectively connected to the working oil ports of a three-position four-way solenoid valve 5. The three-position four-way solenoid valve 5 is respectively connected to a hydraulic source 9 and an oil return tank 8. The three-position four-way solenoid valve 5 includes a normally open left position, a normally closed middle position, and an externally controlled internally leaking right position. The two working oil ports of the right position are both connected to the oil return port of the solenoid valve.
[0015] In this embodiment, a throttling check valve 3 is provided on the first hydraulic oil circuit 1 .
[0016] In this embodiment, a two-position two-way solenoid valve 6 is provided between the hydraulic source 9 and the oil return tank 8 , and the two-position two-way solenoid valve 6 includes a normally open position and a normally closed position.
[0017] In this embodiment, an overflow valve 7 is provided between the hydraulic source 9 and the oil return tank 8 .
[0018] Specifically, a three-position four-way reversing valve, a two-position two-way reversing valve, and a relief valve 7 are used to realize the oil cylinder 2 rising, that is, the left position of the three-position four-way solenoid valve 5, the oil cylinder 2 stops, that is, the middle position of the three-position four-way solenoid valve 5, and when the oil cylinder 2 descends and is in the descending position, that is, the right position of the three-position four-way solenoid valve 5, the rod chamber and the rodless chamber of the oil cylinder 2 are connected and connected to the return oil, and the oil cylinder 2 descends by the dead weight of the load when descending. The oil hole of the oil cylinder 2 is equipped with a one-way throttle valve to realize throttling descent;
[0019] The two-position two-way solenoid valve 6 is in the normal working position, the three-position four-way solenoid valve 5 is in the left working position, and the oil cylinder 2 rises;
[0020] The three-position four-way solenoid valve 5 is located in the middle position, and the two-position two-way solenoid valve 6 is located in the normally closed position, that is, both solenoid valves are not energized, and the oil cylinder 2 is stationary;
[0021] The three-position four-way solenoid valve 5 is located at the right position of external control and internal leakage. The cylinder 2 throttles down under the action of the load's own weight, and the rod chamber and rodless chamber of the cylinder 2 return oil. The load and the cylinder 2 are in a floating position.
[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A valve group structure of a hydraulic control system, characterized in that: It includes a first hydraulic oil circuit and a second hydraulic oil circuit, one end of the first hydraulic oil circuit and the second hydraulic oil circuit are respectively connected to the rodless chamber and the rod chamber of the cylinder, and the other end thereof are respectively connected to the working oil port of the three-position four-way solenoid valve, the three-position four-way solenoid valve is respectively connected to the hydraulic source and the return oil tank, the three-position four-way solenoid valve includes a normally open left position, a normally closed middle position, and an externally controlled and internally leaked right position, and the two working oil ports of the right position are both connected to the return oil port of the solenoid valve.
2. The valve group structure of a hydraulic control system according to claim 1, characterized in that: A throttling one-way valve is arranged on the first hydraulic oil circuit.
3. The valve group structure of a hydraulic control system according to claim 1, characterized in that: A two-position two-way solenoid valve is arranged between the hydraulic source and the oil return tank, and the two-position two-way solenoid valve comprises a normally-on position and a normally-off position.
4. The valve group structure of a hydraulic control system according to claim 1, characterized in that: An overflow valve is arranged between the hydraulic source and the oil return tank.