一种气动液压泵体的进液单向阀

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By adopting a hollow valve body, valve core, and stop block structure in the pneumatic hydraulic pump body, the problem of the inlet check valve failing to close due to spring aging is solved, ensuring the reliable one-way fluid inlet effect of the pneumatic hydraulic pump body and improving the operating efficiency of the hydraulic system.

CN224515371UActive Publication Date: 2026-07-17CHONGQING DONGZHILIN ENERGY SAVING TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHONGQING DONGZHILIN ENERGY SAVING TECHNOLOGY CO LTD
Filing Date: 2025-09-15
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

The existing inlet check valve of the pneumatic hydraulic pump body cannot close due to the decrease in elasticity of the spring after long-term use, which affects the one-way fluid inlet effect of the pneumatic hydraulic pump body.

Method used

A one-way valve for the inlet of a pneumatic hydraulic pump body was designed. It adopts a structure of hollow valve body, valve core and stop block. The reliable closing of the inlet check valve is ensured by the sealing contact between the valve core and the protrusion and the limiting contact of the stop block, avoiding the dependence on spring control.

Benefits of technology

This achieves reliable unidirectional fluid inlet to the pneumatic hydraulic pump body, ensuring the normal operation and efficiency of the hydraulic system.

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Abstract

本实用新型公开了一种气动液压泵体的进液单向阀，气动液压泵体的中心线为竖直延伸，气动液压泵体的下端设有进液单向阀。进液单向阀包括中空阀体、阀芯和挡块。中空阀体的中心线为竖直延伸，中空阀体连通气动液压泵体内外，中空阀体的内周壁上设有凸出部，凸出部设置在中空阀体的下端。阀芯设置在中空阀体内，阀芯与凸出部密封接触并可随气动液压泵体的液压活塞向上运动至凸出部之间形成空隙。挡块安装在中空阀体的上端，挡块与向上运动的阀芯限位接触。本申请通过设置气动液压泵体的中心线为竖直延伸，气动液压泵体的下端设有进液单向阀，并设置进液单向阀包括中空阀体、阀芯和挡块，避免了进液单向阀的开启由其内部的弹簧控制所造成的进液单向阀无法关闭问题，从而确保了气动液压泵体单向进液。

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Claims

1. A one-way inlet valve for a pneumatic hydraulic pump body, wherein the centerline of the pneumatic hydraulic pump body extends vertically, and the one-way inlet valve is provided at the lower end of the pneumatic hydraulic pump body; characterized in that, The inlet check valve includes a hollow valve body, a valve core, and a stop block. The centerline of the hollow valve body extends vertically and connects the inside and outside of the pneumatic hydraulic pump body. A protrusion is provided on the inner peripheral wall of the hollow valve body, and the protrusion is located at the lower end of the hollow valve body. The valve core is located in the hollow valve body, and the valve core is in sealing contact with the protrusion and can move upward with the hydraulic piston of the pneumatic hydraulic pump body to form a gap between the protrusion and the protrusion. The stop block is installed at the upper end of the hollow valve body, and the stop block makes limiting contact with the upwardly moving valve core.

2. The inlet check valve as described in claim 1, characterized in that, The stop block is encapsulated at the upper end of the hollow valve body, and the stop block is provided with a through hole, the center line of which extends vertically.

3. The liquid inlet check valve of claim 2, wherein, The valve core has a first core portion and a second core portion disposed above the first core portion; the outer peripheral wall of the first core portion is spaced a certain distance from the inner peripheral wall of the hollow valve body, the first core portion has a first cavity, and the outer peripheral wall of the first core portion has a first opening communicating with the first cavity; the outer peripheral wall of the second core portion slides in contact with the inner peripheral wall of the hollow valve body, the second core portion has a second cavity communicating with the first cavity, and the upper end of the second core portion has a second opening communicating with the second cavity, the second opening being disposed opposite to the through hole.

4. The liquid inlet check valve of claim 3, wherein There are multiple first openings, and each first opening is arranged around the first core portion.

5. The liquid inlet check valve of claim 2, wherein, The stop block has a first stop portion and a second stop portion disposed above the first stop portion; the first stop portion is disposed inside the hollow valve body, and the inner peripheral wall of the first stop portion is in sealing contact with the inner peripheral wall of the hollow valve body; the second stop portion is disposed outside the hollow valve body, the outer diameter of the second stop portion is larger than the outer diameter of the first stop portion, and the transition surface between the second stop portion and the first stop portion is in limiting contact with the upper end surface of the hollow valve body.

6. The liquid inlet check valve of claim 5, wherein, The outer peripheral wall of the second baffle is a cone shape that gradually tapers from bottom to top.

7. The liquid inlet check valve of claim 6, wherein The upper end face of the hollow valve body on the outer periphery of the second baffle is a cone shape that gradually tapers from bottom to top.

8. The liquid inlet check valve of claim 1, wherein The upper end of the protrusion has a first conical surface that gradually tapers from top to bottom; the lower end of the valve core has a second conical surface that gradually tapers from top to bottom, and the second conical surface is in sealing contact with the first conical surface.

9. The liquid inlet check valve of claim 1, wherein The lower end face of the hollow valve body is a cone shape that gradually tapers from top to bottom.

10. The liquid inlet check valve of claim 1, wherein The hollow valve body has an annular boss on its outer peripheral wall.