Guide ring overwelding seam large-cylinder bottom double-telescopic upright column

A guide ring, double telescopic technology, used in pillars/supports, mining equipment, earthwork drilling, etc., can solve the problems of insufficient expansion ratio affecting support efficiency, small expansion ratio difficult, etc., to improve reliability, optimize stress, Reduce the effect of fixed segments
CN102140923BActive Publication Date: 2014-01-08CCTEG COAL MINING RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CCTEG COAL MINING RES INST
Publication Date
2014-01-08

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Abstract

The invention relates to a guide ring overwelding seam large-cylinder bottom double-telescopic upright column. The telescopic ratio of the double-telescopic upright column is effectively enhanced through a guide ring overwelding seam structure and a method for increasing the spheric radius of the bottom of an outer cylinder; the safety of the double-telescopic upright column is effectively enhanced by adding a bypass safety valve to the double-telescopic upright column; and the guide ring overwelding seam is realized by adopting an interference avoidance structure without processing after a cylinder bottom and a cylinder barrel are welded, thereby the processing process is simplified and the maintenance of a cylinder body is facilitated in the using process; and in addition, the invention is especially suitable for a low-coal-seam hydraulic support and a hydraulic support which has lower support efficiency caused by insufficient telescopic ratio of the double-telescopic upright column.
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Description

technical field

[0001] The invention relates to the technical field of support equipment for underground mining working faces in coal mines, and belongs to a double telescopic column at the bottom of a large cylinder with a guide ring passing through a weld seam, which is specially used for a thin coal seam hydraulic support. Background technique

[0002] With the development of my country's coal mining mechanization and energy strategy, working faces of thin coal seams have appeared one after another, and more and more thin coal seam hydraulic supports are used. At present, one of the key technologies restricting the thin coal seam mining is the coal mining height of the thin coal seam hydraulic support, and the key power element restricting the thin coal seam hydraulic support is the double telescopic column with a large expansion ratio. Due to the small expansion ratio of conventional columns, it is difficult to meet the needs of support in thin coal seams. The hydraulic ...

Claims

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