Miniature plug-in mounting type high-pressure hydraulic overflow valve

Abstract

The invention discloses a miniature plug-in mounting type high-pressure hydraulic overflow valve which comprises a valve body, a pressing ring, a spring seat, a spring, a fine adjustment gasket, a ball seat, a valve seat, a shell, a filter, an expansion pin and a steel ball. The whole overflow valve is of a cylindrical structure and is free of 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. A filter is arranged at the inlet end, the influence of impurities in hydraulic oil on sealing can be effectively avoided, in order to improve the sealing reliability, a high-precision steel ball and a valve seat are adopted for sealing, and meanwhile a ball seat, a spring seat and a spring are arranged for guiding and providing pressure. 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 high-pressure hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a miniature cartridge-type high-pressure hydraulic overflow valve. Background Art

[0002] To ensure the safety of a hydraulic system, a safety valve or an overflow valve is an essential hydraulic component. Currently, the products on the market have practical engineering problems such as large volume, heavy weight, and low sealing reliability.

[0003] The small high-pressure hydraulic overflow 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 small high-pressure hydraulic overflow valve.

[0005] To achieve the above-mentioned invention purpose, the present invention provides a small high-pressure hydraulic overflow valve, which is characterized in that the device includes: a valve body, a pressure ring, a spring seat, a spring, a fine-tuning gasket, a ball seat, a valve seat, a housing, a filter, an expansion pin, and a steel ball;

[0006] The valve body, the pressure ring, the spring seat, the spring, the fine-tuning gasket, the ball seat, the valve seat, the housing, the filter, 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 housing, and only one hole needs to be provided in the hydraulic device for installation. The housing is squeezed and deformed by the expansion pin to be fastened and sealed with the hole of the hydraulic device, without threaded connection;

[0007] A filter is provided at the inlet end of the overflow valve, which can effectively avoid the influence of impurities in the hydraulic oil on the seal;

[0008] For the convenience of processing, the valve body and the valve seat are of a split structure and are connected by interference fit to ensure the connection sealing performance of the valve body and the valve seat;

[0009] The valve seat is formed with a sealing ring belt by squeezing with a steel ball to ensure the sealing effect;

[0010] To ensure the sealing reliability, the steel ball is provided with a small clearance fit between the ball seat, the spring seat and the valve body;

[0011] The spring seat plays a role in supporting and positioning the spring. At the same time, the spring is pre-tightened by the pressure ring to provide a spring force sufficient to overcome the hydraulic pressure for the steel ball;

[0012] Generally speaking, compared with the prior art according to the above technical concept of the present invention, the following technical advantages are mainly possessed:

[0013] The small high-pressure hydraulic overflow valve has a compact structure, small size, no threaded and seal connections, and good sealing performance, and is applicable to small high-pressure hydraulic systems. Description of the Drawings

[0014] Figure 1 It is a structural sectional view of the small high-pressure hydraulic overflow valve constructed according to the preferred embodiment of the present invention;

[0015] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 1-valve body, 2-pressure ring, 3-spring seat, 4-spring, 5-adjusting shim, 6-ball seat, 7-valve seat, 8-housing, 9-filter, 10-expansion pin, 10-steel ball. Detailed Embodiments

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, 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.

[0017] Those skilled in the art can easily understand that the above is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A miniature cartridge high-pressure hydraulic relief valve, characterized in that: It comprises a valve body (1), a pressure ring (2), a spring seat (3), a spring (4), a fine-tuning gasket (5), a ball seat (6), a valve seat (7), a housing (8), a filter (9), an expansion pin (10), and a steel ball (11); The valve body (1), the pressure ring (2), the spring seat (3), the spring (4), the fine-tuning gasket (5), the ball seat (6), the valve seat (7), the housing (8), the filter (9), the expansion pin (10), and the steel ball (11) are assembled from top to bottom to form a cylinder. The outer circle of the housing (8) is provided with an annular groove, and a hole is provided in the hydraulic device for installation. The housing (8) is squeezed and deformed by the expansion pin (10) to be fastened and sealed with the hole of the hydraulic device without the need for threaded connection. The inlet end of the overflow valve is provided with a filter (9), which can effectively prevent the influence of impurities in the hydraulic oil on the seal; The overflow valve is easy to process, and the valve body (1) and the valve seat (7) are separate structures, which are connected by interference fit to ensure the sealing performance of the connection between the valve body (1) and the valve seat (7); In order to ensure the sealing reliability, the steel ball (11) is provided with a ball seat (6), a spring seat (3) and a valve body (1) with a small clearance fit; The spring seat (3) supports and positions the spring (4), and the spring (4) is pre-tightened by the pressure ring (2), providing the steel ball (11) with a spring force sufficient to overcome the hydraulic pressure; The fine-tuning gasket (5) as a debugging part can be installed between the spring (4) and the pressure ring (2) according to the test situation, so that the spring force is adapted to the hydraulic pressure and the steel ball (11) is prevented from being over-opened. The small high-pressure hydraulic relief valve has a compact structure, a small volume, no thread and seal connection, and good sealing performance, and is suitable for a high-pressure hydraulic system.

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