Unloading impact-free valve group of energy accumulator

Abstract

The utility model discloses an energy accumulator unloading impact-free valve group which comprises a one-way valve (1), a proportional flow valve (2), a three-way compensation valve (3), a three-position four-way electromagnetic directional valve (4), a two-position two-way electromagnetic directional valve (5), an oil way (6), a hydraulic pump output port (7), a load sensitive block (8), a multi-way load sensitive block (9) and an oil return tank (10). Wherein the hydraulic pump output port (7) is communicated with the oil return tank (10), the one-way valve (1) is arranged on one side of the oil way (6) and is communicated with the three-position four-way electromagnetic directional valve (4) and the proportional flow valve (2), the three-way compensation valve (3) is communicated with the two-position two-way electromagnetic directional valve (5), and the load sensitive block (8) and the multi-way load sensitive block (9) are connected with the oil way, so that it is guaranteed that the pump rapidly builds pressure; the pressure is slowly released. And the pump pressure is slowly unloaded to generate different unloading effects.

Description

Technical Field

[0001] The utility model relates to the technical field of accumulators, in particular to an accumulator unloading non-shock valve group. Background Art

[0002] Current technology for unloading accumulators has an unloading moment. During the process, the hydraulic pump outlet pressure suddenly drops from a high level to a very low level, which will generate a large impact force and noise, causing vibration to the pipeline, which can easily cause the pipeline to loosen and leak oil. In addition, the noise generated by the large impact force can easily make people think that the product technology does not meet the standards or there is a potential fault.

[0003] The current application number is 202222930294.0, which discloses a steering, lifting and merging hydraulic system and a mining dump truck solution. The patent focuses on the main functions of the accumulator and the accumulator stamping unloading valve, and does not involve how to eliminate the impact force generated during the accumulator unloading process. In addition, the existing technology for unloading the accumulator has an unloading moment. During the process, the hydraulic pump outlet pressure suddenly drops from a high level (such as 20 MPa) to a very low level (such as 0.8 MPa), which will generate a large impact force and noise, causing vibration to the pipeline, which can easily cause the pipeline to loosen and leak oil. Therefore, an accumulator unloading impact-free valve group is urgently needed to solve the current problem. Utility Model Content

[0004] The utility model provides an accumulator unloading non-shock valve group to solve the problems mentioned in the above background. The specific solution is as follows:

[0005] The invention comprises a one-way valve (1), a proportional flow valve (2), a three-way compensation valve (3), a three-position four-way electromagnetic directional control valve (4), a two-position two-way electromagnetic directional control valve (5), an oil circuit (6), a hydraulic pump output port (7), a load-sensitive block (8), a multi-way load-sensitive block (9), and an oil return tank (10); wherein the hydraulic pump output port (7) is connected to the oil return tank (10); the one-way valve (1) is arranged on one side of the oil circuit (6) and is connected to the three-position four-way electromagnetic directional control valve (4) and the proportional flow valve (2); the three-way compensation valve (3) is connected to the two-position two-way electromagnetic directional control valve (5); and the load-sensitive block (8) and the multi-way load-sensitive block (9) are connected to the oil circuit.

[0006] Preferably, at least two layers of filter screens are provided between the hydraulic pump output port (7) and the oil return tank (10).

[0007] Preferably, an oil level gauge is provided on the oil return tank.

[0008] Preferably, the oil return tank (10) has two oil return ports.

[0009] Compared with the existing technology, the present invention can control the opening time of the one-way valve, so that the one-way valve opens slowly and proportionally, reducing the hydraulic shock and noise caused by rapid opening. This solution can control the opening time of the one-way valve to vary between 3-10 seconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 The utility model is a schematic diagram of the control principle of an accumulator unloading non-shock valve group.

[0012] 1. Check valve; 2. Proportional flow valve; 3. Three-way compensating valve; 4. Three-position four-way solenoid directional valve; 5. Two-position two-way solenoid directional valve; 6. Oil circuit; 7. Hydraulic pump output port; 8. Load sensing block; 9. Multi-way load sensing block; 10. Oil return tank. DETAILED DESCRIPTION

[0013] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0015] This solution provides an accumulator unloading non-shock valve group. The specific solution is as follows:

[0016] The invention comprises a one-way valve (1), a proportional flow valve (2), a three-way compensation valve (3), a three-position four-way electromagnetic directional control valve (4), a two-position two-way electromagnetic directional control valve (5), an oil circuit (6), a hydraulic pump output port (7), a load-sensitive block (8), a multi-way load-sensitive block (9), and an oil return tank (10); wherein the hydraulic pump output port (7) is connected to the oil return tank (10); the one-way valve (1) is arranged on one side of the oil circuit (6) and is connected to the three-position four-way electromagnetic directional control valve (4) and the proportional flow valve (2); the three-way compensation valve (3) is connected to the two-position two-way electromagnetic directional control valve (5); and the load-sensitive block (8) and the multi-way load-sensitive block (9) are connected to the oil circuit.

[0017] Preferably, at least two layers of filter screens are provided between the hydraulic pump output port (7) and the oil return tank (10).

[0018] Preferably, an oil level gauge is provided on the oil return tank.

[0019] Preferably, the oil return tank (10) has two oil return ports.

[0020] The hydraulic pump oil flows through the hydraulic pump output port (7), passes through the one-way valve (1), and enters the accumulator valve group, punching the accumulator. The pressure gradually increases. When the pressure reaches the set pressure of the one-way valve (1), the valve core of the one-way valve (1) moves. At this time, the three-position four-way electromagnetic reversing valve (4) slowly opens to unload the pump. After unloading, the pump outlet pressure drops to within 1Mpa after 3-8s.

[0021] Note: T1 and T2 are two oil return ports

[0022] It ensures that the pump builds up pressure quickly and releases pressure slowly. It slowly unloads the pump pressure to produce different unloading effects.

[0023] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. An accumulator unloading non-shock valve group, characterized in that: The invention comprises a one-way valve (1), a proportional flow valve (2), a three-way compensation valve (3), a three-position four-way electromagnetic directional control valve (4), a two-position two-way electromagnetic directional control valve (5), an oil circuit (6), a hydraulic pump output port (7), a load-sensitive block (8), a multi-way load-sensitive block (9), and an oil return tank (10); wherein the hydraulic pump output port (7) is connected to the oil return tank (10); the one-way valve (1) is arranged on one side of the oil circuit (6) and is connected to the three-position four-way electromagnetic directional control valve (4) and the proportional flow valve (2); the three-way compensation valve (3) is connected to the two-position two-way electromagnetic directional control valve (5); and the load-sensitive block (8) and the multi-way load-sensitive block (9) are connected to the oil circuit.

2. The accumulator unloading non-shock valve group according to claim 1, characterized in that: At least two layers of filter screens are provided between the hydraulic pump output port (7) and the oil return tank (10).

3. The accumulator unloading non-shock valve group according to claim 1, characterized in that: An oil level gauge is provided on the oil return tank.

4. The accumulator unloading non-shock valve group according to claim 1, characterized in that: The oil return tank (10) is provided with two oil return ports.

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