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a safety valve

A safety valve and valve core technology, which is used in mining equipment, earth-moving drilling, pillars/supports, etc., can solve the problems of safety valve failure and sealing ring damage, so as to reduce erosion, improve sealing effect, and improve sealing reliability. and service life

Active Publication Date: 2016-04-27
HONGDA INTELLIGENT MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of safety valve adopts a straight-through unloading method, which is sealed by a single O-ring. The valve core moves back and forth. valve failure

Method used

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  • a safety valve
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Experimental program
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Embodiment Construction

[0038] 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.

[0039] Such as Figure 1 to Figure 12 As shown, a safety valve of the present invention includes a valve housing 9 , a valve sleeve 5 , a valve core 6 , a joint 4 , a pressure regulating screw 1 , a return spring 2 and a spring seat 3 .

[0040] The valve casing 9 is a cylindrical member with openings at both ends and a hollow interior. The pressure regulating screw 1 and the joint 4 are threadedly connected to the valve casing 9 at opposite ends of the valve casing 9 respectively. The pressure regulating screw 1 is at one end of the valve casing 9 Screw into the valve housing 9 and be threaded w...

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PUM

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Abstract

The invention discloses a safety valve which comprises a valve casing, a valve bush, a valve element and a connector, wherein the valve bush is provided with a first liquid passing hole and a second liquid passing hole, the valve element is inserted into the valve bush, a first sealing structure is arranged between the valve element and the valve bush and located between the first liquid passing hole and the second liquid passing hole, the first sealing structure comprises a first sealing ring arranged on the valve element in a sleeved mode and a second sealing ring arranged on the first sealing ring in a sleeved mode, and a positioning groove accommodating the first sealing ring is formed in the outer circumferential surface of the first sealing ring. Due to the fact that a sealing structure formed by the two matched sealing rings is arranged between the valve element and the valve bush, the first sealing ring is a specially-shaped ring provided with the positioning groove, and the second sealing ring is embedded into the positioning groove to press the first sealing ring, the first sealing ring is in closer contact with the valve element, and the sealing effect between the valve element and the valve bush can be improved finally.

Description

technical field [0001] The invention relates to a coal mine fully mechanized mining hydraulic support, in particular 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; sometimes cause errors in cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/51E21D23/16
Inventor 李福洪朱述群
Owner HONGDA INTELLIGENT MACHINERY CO LTD