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Dual-protection single hydraulic prop

A single hydraulic prop, double protection technology, applied in props/supports, mining equipment, earth-moving drilling, etc., can solve problems such as user loss, failure of three-purpose valve, bending deformation of props, etc.

Inactive Publication Date: 2011-07-27
陶宾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It was found at the site that no matter whether it is a piston-type single-piece hydraulic prop or a plunger-type single-piece hydraulic prop, during use, due to the rapid pressure on the coal mining face, the three-purpose valve is too late to unload, or the three-purpose valve fails and cannot be unloaded. The phenomenon of bending and deformation of the pillar caused by unloading will make the pillar scrapped and bring great losses to users

Method used

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Embodiment Construction

[0013] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 As shown, the double-protection single hydraulic prop of the present invention includes an oil cylinder 1, a live column 2, a three-purpose valve 7, and a sealing cover 3. An axially stepped inner hole is arranged on the sealing cover 3, and a safety valve assembly 4 is installed in this inner hole. . Such as figure 2 As shown, the safety valve assembly 4 is mainly composed of a valve housing 9, a lock nut 8, a valve core seat 11, a safety valve needle 22, a safety valve pad 13, a hexagonal guide sleeve 14, a steel ball 20, a spring seat 19, and a pressure regulating spring 16 , Pressure regulating nut 17 forms. Such as figure 1 , figure 2 As shown, the outer surface of the valve casing 9 is a stepped cylinder adapted to the inner hole of the axial step on the sealing cover 3. The valve casing 9 is fastened in the sealing cover 3 ...

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Abstract

The invention relates to a dual-protection single hydraulic prop which belongs to the field of mine propping devices and comprises a cylinder (1), a movable prop (2), a three-purpose valve (7) and a seal cover (3). The dual-protection single hydraulic prop is characterized in that an axial stepped inner hole is arranged on the seal cover (3), and a safety valve assembly (4) is arranged in the inner hole. In the dual-protection single hydraulic prop, as the safety valve assembly is additionally arranged as a pressure relief component except for the prior three-purpose valve, high-pressure liquid can flow out from the safety valve assembly when the three-purpose valve is too late to unload the high-pressure liquid or can not unload the high-pressure liquid, therefore, the generation of the phenomena of bending and deformation of the prop can be effectively avoided.

Description

technical field [0001] The invention relates to a mine support equipment, in particular to a single hydraulic prop. Background technique [0002] The single hydraulic prop is a special equipment used for ground special engineering support and underground mining support. There are two types of known public single hydraulic struts at present: a class is a piston type, and another type is a plunger type. [0003] The piston-type single hydraulic prop is mainly composed of a top cover, a live post extension, a column head, a three-purpose valve, a live post barrel, a piston, an oil cylinder, a base, and a reset spring; the top cover is closed on the upper part of the live post extension and an elastic cylinder The pin is connected with it, the lower part of the extended section of the live column is welded with the upper end of the column head, the lower end of the column head is welded with the live column tube, and the three-purpose valve is installed in the column head; the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/44
Inventor 陶宾潘德珑张江平
Owner 陶宾
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