Small size one-way valve

By employing a limit-fixed support base and a two-stage pressure adaptive valve core design in the hydraulic control system of excavators, the problem of inconvenient installation of check valves has been solved, realizing a small-sized and highly efficient check valve.

CN224515517UActive Publication Date: 2026-07-17SHANZHONG JIANJI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANZHONG JIANJI CO LTD
Filing Date
2025-08-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing excavator hydraulic control systems, the length and size of the check valves are relatively large, which makes installation inconvenient.

Method used

The design adopts a first valve body and a second valve body limiting and fixing support base, eliminating the need for an independent fixing and limiting structure. Combined with a two-stage pressure adaptive opening valve core with conical and spherical valve cores, it achieves low-pressure sensitive response and pressure relief function.

Benefits of technology

The length and volume of the one-way valve have been shortened, making it easier to assemble and arrange inside the excavator, and enabling low-pressure sensitive response and pressure relief function for hydraulic oil shock.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224515517U_ABST
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Abstract

The utility model discloses a small size check valve, first valve core chamber is linked with the liquid inlet chamber and is provided with the transition structure of horn shape in the communication part, and the left side fixed setting of second valve body has the nut, and the right side of first valve body is connected with second valve body through the screw thread, and the inside of second valve body is provided with the liquid outlet chamber of penetration, the utility model discloses the mode of first valve body, second valve body limit fixed support seat, has saved the independent fixed limit structure, has saved the space that fixed limit structure occupies, can shorten the length of check valve, is convenient for the internal assembly and arrangement of check valve in excavator, and the device still realizes two stage pressure self -adaptation opening valve core through being provided with the mode of valve core, can realize low pressure sensitive response or the function of pressure relief to the impact of hydraulic oil, reduces the volume of double check valve simultaneously, is convenient for the internal assembly and arrangement of check valve in excavator.
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Claims

1. A small-sized one-way valve, characterized in that: The system includes a first valve body (1), a second valve body (2), a support base (3), a conical valve core (4), and a spherical valve core. The first valve body (1) has an open first valve core cavity (11) on its right side and an open liquid inlet cavity (12) on its left side. The diameter of the first valve core cavity (11) is larger than the diameter of the liquid inlet cavity (12). The first valve core cavity (11) and the liquid inlet cavity (12) are connected, and a flared transition structure (13) is provided at the connection point. A nut (22) is fixedly provided on the left side of the second valve body (2). The right side of the first valve body (1) is connected to the second valve body (2) via a thread. A through-hole liquid outlet cavity (21) is provided inside the second valve body (2). A limiting groove (14) is provided at the right end of the first valve core cavity (11). The limiting groove (14) cooperates with the second valve body (2) to limit the installation of a support base (3). The support base (3) has several first liquid holes (32). A guide rod (31) is provided on the left side of the middle part of the cone valve core (4). The outer side of the cone valve core (4) is engaged with the transition structure (13). A sleeve rod (42) is connected to the right side of the cone valve core (4). The right side of the sleeve rod (42) is fitted onto the guide rod (31). A first spring (5) is fitted on the outer side of the sleeve rod (42). The two ends of the first spring (5) are connected to the cone valve core (4) and the support seat (3) respectively. A second valve core cavity (4) is provided in the middle part of the sleeve rod (42). 3) The conical valve core (4) is provided with a horn-shaped second liquid hole (41) in the middle and the second liquid hole (41) is connected to the second valve core cavity (43). The sleeve rod (42) is provided with a third liquid hole (44) on the side and the third liquid hole (44) is connected to the second valve core cavity (43). A spherical valve core is installed inside the second valve core cavity (43). The spherical valve core cooperates with the second liquid hole (41). A second spring (7) is provided between the spherical valve core and the guide rod (31).

2. A small size check valve according to claim 1, characterized in that: The left side of the first valve body (1) is provided with threads.

3. The small size check valve according to claim 1, wherein: The left side of the first valve body (1) is provided with a second sealing ring (9).

4. The small size check valve according to claim 1, wherein: A limit structure (24) is provided on the right side of the second valve body (2).

5. A small size check valve according to claim 4, wherein: The limiting structure (24) is annular.

6. A small size check valve according to claim 4, wherein: The limiting structure (24) is convex.

7. The small size check valve according to claim 1, wherein: The inner side of the nut (22) is provided with a sealing ring groove (23), and a first sealing ring (8) is installed in the sealing ring groove (23).