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

Active Publication Date: 2014-01-08
CCTEG COAL MINING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small expansion ratio of conventional columns, it is difficult to meet the needs of support in thin coal seams. The hydraulic support used in medium-thick coal seams will also affect the support efficiency due to insufficient expansion ratio. Therefore, it is imperative to develop double-telescopic columns with large expansion ratios.

Method used

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

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Embodiment Construction

[0016] see figure 1 , figure 2 and image 3 Shown: a double telescopic column at the bottom of a large cylinder with a guide ring passing through the weld seam, which is composed of the outer cylinder 1, the middle cylinder 2 and the live column 3 as the main force-bearing rods. The guide ring 4 is installed on the middle cylinder and the live column is equipped with Guide ring 5. The inside of the outer cylinder bottom is made hollow, and the middle cylinder bottom is placed in its cavity to the maximum extent; at the same time, the live column bottom is placed in the middle cylinder bottom to the maximum extent, so that the three have a greater degree of overlap. On the side of the outer cylinder (see figure 2 ) The bypass safety valve is set within the range of 40 degrees to 45 degrees (see image 3 ) port K to install a safety valve.

[0017] Figure 4 Shown is figure 1 The structure of the guide ring of the middle and outer cylinder passing through the cylinder b...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/44E21D15/51
Inventor 王国法赵志礼杜忠孝任怀伟
Owner CCTEG COAL MINING RES INST
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