Miniature plug-in mounting type precise hydraulic one-way valve

Abstract

The invention discloses a miniature plug-in mounting type precise hydraulic one-way valve which comprises a valve body, a spring seat, a spring, a ball seat, a sleeve, an expansion pin and a steel ball. The whole one-way valve is of a cylindrical structure without threads and sealing pieces, the hydraulic device does not need to design threaded connection and sealing installation space, and the size of the hydraulic device is greatly reduced; in order to improve the sealing reliability, the high-precision steel ball and the valve body are adopted for sealing, meanwhile, the ball seat, the sleeve and the spring are arranged for guiding and providing pressure, the steel ball is limited through the spring seat and the ball seat, and the steel ball is prevented from being excessively opened. The invention has the advantages of compact structure, small volume, no thread and sealing element connection and good sealing performance, and is suitable for a precise hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a micro cartridge type precision hydraulic check valve. Background Art

[0002] The check valve is an essential hydraulic component in the hydraulic system. Currently, the products on the market have practical engineering problems such as large volume, heavy weight, and low sealing reliability.

[0003] The small precision hydraulic check valve proposed by the present invention reduces the product volume and improves the sealing reliability through a series of design methods, and is very suitable for use in small hydraulic systems. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present application provides a micro cartridge type precision hydraulic check valve.

[0005] To achieve the above-mentioned invention purpose, the present invention provides a small precision hydraulic check valve, which is characterized in that the device includes: a valve body, a spring seat, a spring, a ball seat, a sleeve, an expansion pin, and a steel ball;

[0006] The valve body, the spring seat, the spring, the ball seat, the sleeve, the expansion pin, and the steel ball are assembled from top to bottom to form a cylinder. An annular groove is provided on the outer circle of the valve body, and only one hole needs to be provided in the hydraulic device for installation. The expansion pin is used to squeeze and deform the valve body to be fastened and sealed with the hole of the hydraulic device without screw connection;

[0007] The check valve forms a sealing ring belt by squeezing the valve body with a steel ball to ensure the sealing effect;

[0008] To ensure the sealing reliability of the steel ball, the spring seat, the spring, the ball seat, and the steel ball are arranged in the middle of the sleeve. The spring seat, the spring, the ball seat, and the steel ball are in small clearance fit with the sleeve, which can ensure good guidance and smooth movement of the spring seat, the spring, the ball seat, and the steel ball;

[0009] The spring seat and the ball seat play a role in supporting and positioning the spring. At the same time, the spring is pre-tightened by the spring seat and the ball seat, providing sufficient spring force for the steel ball to overcome the hydraulic pressure.

[0010] Generally speaking, compared with the prior art according to the above technical concept of the present invention, the following technical advantages are mainly possessed:

[0011] The small precision hydraulic check valve has the characteristics of compact structure, small volume, no screw and seal connection, and good sealing performance. Brief Description of the Drawings

[0012] Figure 1 It is a structural sectional view of the small precision hydraulic check valve constructed by the preferred embodiment of the present invention;

[0013] In all the drawings, the same reference numerals are used to denote the same elements or structures, where: 1-valve body, 2-spring seat, 3-spring, 4-ball seat, 5-sleeve, 6-expansion pin, 7-steel ball. Detailed implementation mode

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the drawings and 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0015] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A miniature cartridge precision hydraulic one-way valve, characterized in that: It comprises a valve body (1), a spring seat (2), a spring (3), a ball seat (4), a sleeve (5), an expansion pin (6), and a steel ball (7); The valve body (1), spring seat (2), spring (3), ball seat (4), sleeve (5), expansion pin (6), and steel ball (7) are assembled from top to bottom to form a cylindrical body. The outer circle of the valve body (1) is provided with an annular groove, and a hole is provided in the hydraulic device for installation. The expansion pin (6) is used to squeeze and deform the valve body (1) and fasten and seal it with the hole of the hydraulic device without threaded connection. In order to ensure the sealing effect, the one-way valve uses a steel ball (7) to squeeze the valve body (1) to form a sealing ring; In order to ensure the sealing reliability of the steel ball (7), the one-way valve has the spring seat (2), the spring (3), the ball seat (4), and the steel ball (7) arranged in the middle of the sleeve (5). The spring seat (2), the spring (3), the ball seat (4), the steel ball (7) and the sleeve (5) are matched with a small gap, which can ensure that the spring seat (2), the spring (3), the ball seat (4), and the steel ball (7) are well guided and move smoothly. The spring seat (2) and the ball seat (4) play a supporting and positioning role for the spring (3), and at the same time, the spring (3) is pre-tightened by the spring seat (2) and the ball seat (4), providing the steel ball (7) with a spring force sufficient to overcome the hydraulic pressure; The small precision hydraulic one-way valve has the characteristics of compact structure, small volume, no thread and sealing connection and good sealing performance.

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