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Two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support

A hydraulic support and electro-hydraulic control technology, which is applied in mine roof support, mining equipment, earthwork drilling and mining, etc., can solve the problems of easy damage to the support, moving speed, unbalanced force of the four-column hydraulic support, etc., to improve the overall reliability , Improve structural strength and reliability, and increase the effect of lifting speed

Active Publication Date: 2015-06-17
山西平阳煤机装备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of unbalanced force on the existing four-column hydraulic support, easy damage to the support and slow moving speed, the present invention provides a two-column shielding type electro-hydraulic control top coal caving hydraulic support

Method used

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  • Two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support
  • Two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support
  • Two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support

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Embodiment Construction

[0022] The two-column shield type electro-hydraulic control top coal caving hydraulic support includes a base 1, a roof beam 2 and a shield beam 3 hinged to the roof beam 2, a balance jack 4 is arranged between the shield beam 3 and the roof beam 2, and the shield beam 3 is connected to the roof beam 2. Between the base 1 there is a front link 5 and a rear link 6 which are hinged to both, the top beam 2 is an integral structure, and between the top beam 2 and the base 1 there are two uprights which are distributed left and right and the top is inclined forward 7. An electro-hydraulic control system communicating with each column 7 is installed in the cavity;

[0023] The electro-hydraulic control system includes a double-inlet and double-return quick-inlet and return system, and the double-inlet and double-circuit quick-inlet and return system includes a rapid liquid supply hydraulic control check valve 8, a hydraulic control check valve 9, an electro-hydraulic control reversin...

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Abstract

The invention discloses a two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support. By the aid of the hydraulic support, the problems that existing four-prop hydraulic supports are stressed unevenly, damaged easily and moved slowly are solved. A top beam is in an integrated structure, two upright props which are arranged on the left and right sides are arranged between the top beam and a base, tops of two upright props are inclined forwards, an electro-hydraulic control system which is communicated with a cavity of each of the upright props is arranged inside the cavity, electro-hydraulic control systems comprise double-inlet double-return quick liquid inlet and return systems, upright props are communicated with a quick-liquid-supply hydraulically-controlled one-way valve and a hydraulically-controlled one-way valve, the quick-liquid-supply hydraulically-controlled one-way valve is communicated with an electro-hydraulic-control reversing valve, the return disconnection valve is communicated with the electro-hydraulic-control reversing valve and the hydraulically-controlled one-way valve, an automatic back-flushing filter is communicated with the quick-liquid-supply hydraulically-controlled one-way valve and the electro-hydraulic-control reversing valve, and the electro-hydraulic-control reversing valve is communicated with the hydraulically-controlled one-way valve. The hydraulic support is reasonable and reliable in structural design, the working resistance reaches 17000kN, and the automatic exploitation of fully mechanized caving units with 10-20m super high seams can be achieved.

Description

technical field [0001] The invention relates to a hydraulic support for underground coal mines, in particular to a two-column shielding type electro-hydraulic control caving hydraulic support. Background technique [0002] Thick coal seam reserves of key state-owned coal mines in my country account for 44%, and the output of thick coal seam mining accounts for more than 45%. At present, the mining methods of thick coal seams in key coal mines in my country mainly include fully-mechanized top-coal caving mining and fully-mechanized mining with large mining height. The thickness of the coal seam is 4-7m, and the hardness of the coal seam is relatively high. High mining. For the mining of many extra-thick coal seams with a thickness of 10-20m, large-scale high-level top-coal caving mining is adopted. At present, four-pillar large-scale high-level top-coal caving supports are basically used in China. [0003] The four-column support cover-type top-coal caving hydraulic support ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/26E21D23/18
Inventor 赵红梅马占江冀贵升黄勇杰雷卫杰贾敏杜晋锋王通
Owner 山西平阳煤机装备有限责任公司
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