Filled hollow hydraulic prop device

Abstract

The invention provides a filling type hollow hydraulic support device and belongs to the technical field of hydraulic supports. The filling type hollow hydraulic support device is characterized in that the filling type hollow hydraulic support device comprises a blind hole base, a connecting disk, an outer cylinder body, an inner cylinder body, a piston, a compressing spring, a piston cover, a top cover, a top cover connecting disk, an oblique wedge and a ring sleeve; a top cover connecting disk of the top cover is connected with a piston of a hollow hydraulic cylinder formed through combination of the outer cylinder body, the inner cylinder body, the piston, the compressing spring and the piston cover; the bottom end of the hollow hydraulic cylinder is connected with the upper end of the blind hole base through the connecting disk; the T-shaped top cover penetrates through hollow cavities of all the parts; filling balls are poured into a center cavity of the blind hole base through a funnel inserted into an oblique hole in the blind hole base, so that the functions of hydraulic constant-resistance support in a working state and fault-tolerance support for safe supporting of the filling balls and the T-shaped top cover in a fault state are achieved; and when a support is dismounted, the filling balls are taken out after the oblique wedge of the blind hole base is pulled out, and thus hydraulic unloading is achieved. The filling type hollow hydraulic support device has the advantages that the structure is simple, installation and maintenance are convenient, and safety is facilitated through dual support.

Description

technical field [0001] The invention belongs to the technical field of hydraulic props, and in particular relates to a hollow hydraulic prop device. Background technique [0002] At present, in coal mining, mining and tunnel construction at home and abroad, the working face is mostly supported by single hydraulic props, which mainly have the following disadvantages: ① After the hydraulic system failure of the single hydraulic prop, it loses its supporting capacity and has poor safety ; ②The inner cavity friction clamping mechanism of the early warning single hydraulic prop is complex, difficult to manufacture and maintain, and high in cost. Contents of the invention [0003] The object of the present invention is to provide a filled hollow hydraulic prop device, which can effectively overcome the shortcomings of the prior art. [0004] The present invention is achieved like this, and its characteristics are as figure 1 As shown, it includes blind hole base 1, connection ...

AI Technical Summary

Problems solved by technology

[0002] At present, in coal mining, mining and tunnel construction at home and abroad, the working face is mostly supported by single hydraulic props, which mainly have the following disadvantages: ① After the hydraulic system failure of the single hydraulic prop, it loses its supporting capacity and has poor safety ; ②The inner cavity friction clamping mechanism of early warning single hydraulic prop is complex, difficult to manufacture and maintain, and high in cost

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