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Safety valve

A safety valve and valve body technology, which is applied in mining equipment, earthwork drilling, pillars/supports, etc., can solve the problems of reducing the service life of safety valves, small liquid hole diameter, and small drainage flow, so as to prevent jamming Or the effect of bending deformation, axial deformation reduction, and pressure fluctuation reduction

Inactive Publication Date: 2016-05-25
JULONG GROUP WUHU XINGLONG HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The overflow channel of the existing safety valve adopts the liquid passage hole arranged around the side wall of the valve core. The diameter of the liquid passage hole is small, resulting in small discharge flow and large flow loss. The seat bears the axial force exerted by the return spring, which leads to poor stress on the valve core and large pressure fluctuations during the working process, which leads to generally unsatisfactory closing pressure of the safety valve, and eventually leads to failure of the hydraulic components connected to the safety valve. Such as excessive loss of oil in the high-pressure cylinder, resulting in waste
The sealing effect between the spool and the valve sleeve is not ideal, and the processing accuracy of the groove on the surface of the spool for installing the seal is not easy to control
In addition, the spring chamber inside the valve housing is in an open state, the stability of the spring seat is poor when moving, and the dustproof, waterproof and rustproof effects in the spring chamber are poor, which reduces the service life of the safety valve

Method used

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Embodiment Construction

[0042] The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.

[0043] like Figure 1 to Figure 10 As shown, the present invention provides a safety valve, including a valve body 3 with a liquid discharge hole 31, a liquid inlet joint 8 with a liquid inlet hole 84, a valve housing 9 connected to the valve body 3 and a valve housing 9 arranged inside The reset mechanism, the liquid inlet hole 84 communicates with the liquid discharge hole 31 through the unloading chamber 32 inside the valve body 3 and the three form an overflow channel of the safety valve. In order to solve the existing problems in the prior art, the safety valve of the present invention also ...

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Abstract

The invention discloses a safety valve, which comprises a valve body, a liquid inlet joint, a spring seat and a reset spring, wherein the liquid inlet joint is provided with a liquid inlet hole. The safety valve also comprises a valve core assembly; the valve core assembly is movably arranged in the valve body and is used for controlling the liquid inlet hole to be opened or closed; the valve body is provided with a liquid discharge hole; the valve core assembly comprises a sliding seat, a screw sleeve and a valve pad; the screw sleeve is arranged in the sliding seat; the valve pad is arranged in the screw sleeve, and is provided with a spherical groove; the spring seat is provided with a first lug boss inserted into the reset spring. The safety valve has the advantages that the movable valve core assembly is arranged in a valve case; the valve core assembly can be used for controlling the make-and-break state of an oil path from the liquid inlet hole to the liquid discharge hole; after the valve core assembly leaves far away from the liquid inlet joint, the high-flow-rate overflow can be realized; the flow rate of the safety valve is greatly improved; the axial displacement of the valve core assembly can be reduced through the short-time fast overflow; the axial displacement of the valve core assembly is reduced, so that the axial deformation of the reset spring is reduced; the pressure fluctuation can be finally reduced.

Description

technical field [0001] The invention belongs to coal mine fully mechanized mining hydraulic support, in particular, the invention relates to a safety valve. Background technique [0002] With the large-scale implementation and development of coal mine fully mechanized mining hydraulic supports, fully mechanized mining work has more and more stringent requirements for hydraulic supports, so there are further requirements for the safety valve of the hydraulic cylinder of the protection support, especially for the safety valve There are further requirements for the service life and reliability of the hydraulic support. When the pressure from the top of the hydraulic support causes passive force, whether the safety valve can unload in a short time, fully and stably under the condition of high pressure directly affects the service life of the support. and support security. It will not only damage seals, pipes and hydraulic components, but also cause vibration and noise; sometime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/51E21D23/16
CPCE21D15/512E21D23/16
Inventor 李福洪朱述群谢瑞李子昂林文彬陶兴陈伟奚光荣高俊强
Owner JULONG GROUP WUHU XINGLONG HYDRAULIC
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