Proportional valve element of asymmetric structure for controlling single-side pressure output

Abstract

The utility model discloses a proportional valve core with an asymmetric structure for controlling single-side pressure output, a proportional valve core groove and a miniature one-way valve are arranged on the proportional valve core, a pressure throttling groove is arranged on one side of the proportional valve core, and a flow throttling groove is arranged on the other side of the proportional valve core. One end of the valve element is designed to be flow control, the other end of the valve element is controlled to be pressure output, the valve element can be installed according to actual needs, a more stable anti-load-oscillation structure is provided, the structure is convenient, safe and reliable, the labor intensity of workers is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of proportional valves, in particular to a proportional valve core with an asymmetric structure for controlling single-side pressure output. Background Art

[0002] The more practical proportional valve core of the hydraulic system in the prior art is a flow control type structure, a hydraulic structure that controls the displacement of the hydraulic cylinder. The operating principle of this manual hydraulic structure system is to control the relatively stable speed of the actuator, control the lifting or lowering of the hydraulic cylinder during load transportation, and has good control performance. The cost of the entire system is not high and it is practical in many occasions. However, for occasions with large load inertia, the defects are more obvious, and vibrations are generated in the LS system, affecting the control stability.

[0003] Therefore, it is necessary to develop a new type of proportional valve core in a targeted manner to provide a more stable structure that can resist load shocks. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the prior art, the utility model provides a proportional valve core with an asymmetric structure for controlling single-sided pressure output. One end of the valve core is designed for flow control, and the other end is controlled for pressure output. It can be installed according to actual needs to provide a more stable structure that resists load shocks. The structure is convenient, safe and reliable, reduces manual labor intensity and improves work efficiency.

[0005] Technical solution: The utility model is a proportional valve core with an asymmetric structure for controlling unilateral pressure output, characterized in that a proportional valve core groove and a micro one-way valve are arranged on the proportional valve core, a pressure throttling groove is arranged on one side of the proportional valve core, and a flow throttling groove is arranged on the other side of the proportional valve core.

[0006] Wherein, the proportional valve core is an asymmetric structure for controlling the single-side pressure output.

[0007] Wherein, the diameter of one side of the pressure throttling groove is R1, and the diameter of the other side is R2, and R1 is smaller than R2.

[0008] Wherein, the ratio of the diameter R1 to the diameter R2 is 1:4-6.

[0009] Wherein, the proportional valve core is arranged on the proportional valve of the hydraulic system.

[0010] Beneficial effects: Compared with the prior art, the utility model has the following significant advantages: the utility model designs one end of the valve core for flow control and the other end for pressure output, which can be installed according to actual needs, providing a more stable structure that resists load shocks, with a convenient structure, safe and reliable, reducing manual labor intensity and improving work efficiency.

[0011] The utility model combines hydraulic fluid transmission with hydraulic structure design to achieve the purpose of effectively improving work efficiency. The test results show that the use of the proportional valve core of the steady-state power can effectively eliminate the unbalanced force on the valve core. The asymmetric structure of the utility model is more suitable for practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a side view structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the pressure throttling groove of the utility model;

[0016] In the figure, 1 is the groove of the proportional valve core; 2 is the micro check valve; 3 is the pressure throttling groove; and 4 is the flow throttling groove. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0018] The proportional valve core of the utility model has an asymmetric structure for controlling the unilateral pressure output, and a proportional valve core groove 1 and a micro check valve 2 are arranged on the proportional valve core, a pressure throttling groove 3 is arranged on one side of the proportional valve core, and a flow throttling groove 4 is arranged on the other side of the proportional valve core. The proportional valve core is an asymmetric structure for controlling the unilateral pressure output. The diameter of one side of the pressure throttling groove 3 is R1, and the diameter of the other side is R2, and R1 is smaller than R2. The ratio of the diameter R1 to the diameter R2 is 1:4-6. The proportional valve core is arranged on the proportional valve of the hydraulic system.

[0019] The asymmetric proportional valve core of the utility model for controlling the unilateral pressure output includes a proportional valve core groove 1, a micro one-way valve 2, a pressure throttling groove 3 and a flow throttling groove 4. These characteristic structures are combined to form a relatively special integral proportional valve core. When the valve core moves linearly and is pushed to the pressure throttling groove 3 to work, the oil in the hydraulic cylinder can push the hydraulic actuator to a certain position through the high-pressure oil pipe according to the pressure difference of the load. When the valve core moves linearly and is pushed to the other side until the position of the flow throttling groove 4, the hydraulic cylinder can maintain uniformity for lifting.

[0020] The utility model uses the change of LS pressure to control the load, one is to obtain flow, the other is to obtain pressure, to achieve the pursuit of running speed or stable operation when the load moves. For more reliable operation, it can also be configured and applied together with a balancing valve. After inputting the flow, it can form two application options of speed or pressure stability for the working load.

[0021] One end of the flow throttling groove controls the output flow. The basic principle is that the pressure of the working oil port is equal to the LS system pressure. The pressure difference between the LS system and the main valve oil inlet pressure is stable. The flow output mainly depends on the opening of the flow throttling groove of the valve core. It has a good application in occasions where the flow output control is stable. It is easy to use. When in use, the handle or electric control operates the valve core displacement to control the opening of the valve core's throttling groove to achieve stable speed and force operation of the hydraulic cylinder.

[0022] One end of the pressure throttling groove controls the output pressure. The basic principle is that the pressure of the working oil port is not equal to the LS system pressure. As the LS system pressure moves with the displacement of the valve core, the pressure generated gradually increases, which is significantly different from the flow throttling valve core. The larger the opening of the pressure throttling groove, the greater the pressure output to the load. It has a good application in pressure output occasions. The application of the oscillation system is a feature of the pressure throttling groove, which has a significant effect on load oscillation, but the disadvantages are also obvious: the dead zone of the valve core changes with the load conditions, and the output flow (i.e., the operating speed) also changes with the load. However, in some occasions, it is necessary to pursue system safety and stability, give up some acceleration functions, reduce load oscillation fluctuations, and achieve rapid stabilization of the system.

Claims

1. A proportional valve core with an asymmetric structure for controlling unilateral pressure output, characterized in that: A proportional valve core groove (1) and a micro check valve (2) are arranged on the proportional valve core, a pressure throttling groove (3) is arranged on one side of the proportional valve core, and a flow throttling groove (4) is arranged on the other side of the proportional valve core.

2. The asymmetric proportional valve core for controlling unilateral pressure output according to claim 1, characterized in that: The proportional valve core is an asymmetric structure for controlling the single-side pressure output.

3. The asymmetric proportional valve core for controlling single-side pressure output according to claim 1, characterized in that: The diameter of one side of the pressure throttling groove (3) is R1, and the diameter of the other side is R2, and R1 is smaller than R2.

4. The asymmetric proportional valve core for controlling single-side pressure output according to claim 3, characterized in that: The ratio of the diameter R1 to the diameter R2 is 1:4-6.

5. The asymmetric proportional valve core for controlling single-side pressure output according to claim 1, characterized in that: The proportional valve core is arranged on the proportional valve of the hydraulic system.

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