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Inflatable safety valve for emulsion pump

An emulsion pump and safety valve technology, which is used in mining equipment, earth-moving drilling, pillars/supports, etc., can solve the problems of large shape, large volume and exaggeration of the safety valve, and achieve the effect of long life and good anti-fouling ability.

Pending Publication Date: 2018-11-27
ZHEJIANG ZHONGMEI HYDRAULIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the spring can be processed, the shape of the safety valve is somewhat exaggerated because of its volume.

Method used

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  • Inflatable safety valve for emulsion pump

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Experimental program
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Effect test

Embodiment Construction

[0009] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0010] see figure 1 , one An inflatable safety valve for an emulsion pump includes a joint 1, a casing 2, a valve core 3, an air valve 4, a screw sleeve 5, a screw plug 6, a small spring 11 and corresponding sealing rings. The joint 1 is axially opened with a main liquid inlet hole and a sealing port. The conical surface of the valve core 3 and the sealing port of the joint 1 form a hard seal pair, which improves the service life and anti-fouling ability of the liquid chamber. The outer groove sealing ring 10 on the valve core 3 can ensure the reliability of nitrogen radial sealing. The small sealing ring 12 forms an axial seal with the screw sleeve 5 on the end face groove of the air valve 4 to ensure timely one-way sealing and locking after inflation. The casing 2 is provided with four evenly distributed liquid discharge holes in the radial direc...

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PUM

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Abstract

The invention discloses an inflatable safety valve for an emulsion pump. The inflatable safety valve is mainly used for safety protection of emulsion pumps in order to prevent the situation that overall system pressure is too high since unloading valves of the emulsion pumps are broken and cannot be used for normal unloading. The inflatable safety valve adopts high-pressure nitrogen for replacingmechanical springs to serve as elastic elements. Under the condition that the drift diameter for liquid drainage is increased, the size of the safety valve is reduced, and the response time of the safety valve is shortened. A liquid cavity sealing pair adopts a steel-steel hard sealing mode and has the advantages of long service life and great antifouling performance. The area of a liquid cavity sealing port is 50% of the airtight area of a valve core, the inflation pressure is decreased, and the sealing reliability is improved.

Description

technical field [0001] The invention relates to a safety valve, in particular to the safety protection of an emulsion pump, so as to avoid excessive pressure of the whole system caused by damage to the unloading valve of the emulsion pump and failure of normal unloading. Background technique [0002] At present, domestic emulsion pumps still use a large number of mechanical spring-type safety valves. Since domestic large-flow high-pressure emulsion pumps have not been popularized before, mechanical spring-type safety valves played a great role at that time. However, with the large mining height and a large number of applications of top-coal caving supports, the working resistance continues to increase, and the industrial and mining environment continues to change. The requirements for the dynamic stability, service life and discharge flow of safety valves are getting higher and higher. [0003] As the initial support force of the hydraulic support and the bore diameter of th...

Claims

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Application Information

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IPC IPC(8): E21D15/51
CPCE21D15/512
Inventor 吴汉武汪荣争
Owner ZHEJIANG ZHONGMEI HYDRAULIC MACHINERY
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