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Safety valve

A safety valve and valve sleeve technology, which is used in mining equipment, earth-moving drilling, pillars/supports, etc., can solve the problems of slow dynamic response, damage and influence of pillars and top beam components, and achieve the reduction of elastic coefficient and dynamic response. fast effect

Inactive Publication Date: 2012-10-31
乐清市东风煤矿设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the existing safety valve wants to obtain a large flow rate, it often needs a return spring with a large elastic coefficient, resulting in slow dynamic response, which cannot meet the needs of hydraulic supports with high and thick bores. The top beam and other components are damaged, which affects the normal underground coal mining

Method used

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Embodiment 1

[0014] figure 1 It is a structural schematic diagram of the present invention, showing a specific embodiment of the present invention.

[0015] This embodiment is a safety valve, see figure 1 As shown, it includes a valve body 1 with a valve chamber 11, and a valve sleeve 2, a valve core 3, a spring seat 4, a spring 5 and a pressure regulating screw 6 arranged in the valve chamber 11; the valve body 1 is also provided with The liquid inlet channel 12, the liquid outlet channel 13, and the valve hole 14 for connecting the liquid inlet channel 12 and the liquid outlet channel 13; the center of the valve sleeve 2 is provided with a sliding hole 21 and a pressure valve located in the middle of the sliding hole 21 Cavity 22; one end of the valve core 3 is provided with a sealing portion 31 for blocking the valve hole 14, the other end is provided with a pressing portion 32 for pressing against the spring seat 4, and the middle end is provided for pressing on the valve hole 14. Th...

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Abstract

The invention discloses a safety valve. The safety valve comprises a valve body, a valve sleeve, a valve core, a spring seat, a spring, and pressure adjusting screws, wherein the valve body is provided with a valve chamber; the valve sleeve, the valve core, the spring seat, the spring and the pressure adjusting screws are arranged in the valve chamber; the valve body is also provided with a liquid inlet channel, a liquid outlet channel and a valve hole for communicating the liquid inlet channel and the liquid outlet channel; a sliding hole and a pressure chamber positioned at the middle of the sliding hole are arranged at the centre of the valve sleeve; one end of the valve core is provided with a sealing part for blocking the valve hole, and the other end of the valve core is provided with a propping part propped on the spring seat; a sliding part sliding in the sliding hole of the valve sleeve is arranged at the middle end of the valve core; a blind hole and a liquid guide hole are arranged on the valve core, wherein the opening of the valve core is positioned at the centre of the sealing part, and the liquid guide hole is used for communicating the blind hole and a pressure chamber in the valve sleeve; and one end of the spring is propped on the spring seat, and the other end of the spring is propped on the adjusting screw. Compared with the traditional product, the safety valve can effectively reduce the elasticity coefficient of a returning spring on the premise that the same flow is achieved, thus achieving the technical effect under relatively fast dynamic response.

Description

technical field [0001] The invention belongs to the technical field of coal mine equipment hydraulic supports, and in particular relates to a safety valve. Background technique [0002] The safety valve is a key component to protect the safety of the hydraulic support, and its performance must be reliable. With the development of comprehensive mechanized coal mining, the hydraulic support with large mining height and thick cylinder diameter is gradually increasing. Therefore, the large flow safety valve is an indispensable safety protection hydraulic component for hydraulic support and coal mine safety production. However, if the existing safety valve wants to obtain a large flow rate, it often needs a return spring with a large elastic coefficient, resulting in slow dynamic response, which cannot meet the needs of hydraulic supports with high and thick bores. The top beam and other components are damaged, which affects the normal underground coal mining. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/51
Inventor 赵雪祥李静
Owner 乐清市东风煤矿设备有限公司
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