Low-position coal-caving hydraulic bracket

A technology for hydraulic support and top coal caving, which is applied to mine roof supports, mining equipment, earthwork drilling, etc. Due to problems such as the large cover range of the mechanism, the effect of increasing the expansion and contraction stroke of the insert plate, the large shrinkage range and the improvement of the cover range can be achieved.

Active Publication Date: 2012-02-15
兖矿能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantage that the existing low-level top-coal caving hydraulic support adopts a single-stage telescopic inserting plate coal-caving mechanism that cannot well adapt to the fully-mechanized caving face with large changes in support height,

Method used

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  • Low-position coal-caving hydraulic bracket
  • Low-position coal-caving hydraulic bracket
  • Low-position coal-caving hydraulic bracket

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Embodiment Construction

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

[0014] exist figure 1 , 2 The structure of the low-level top-coal caving hydraulic support of the present invention is shown in . The low-level top-coal caving hydraulic support is also called two-stage telescopic plug-in plate type and two-column low-level top-coal caving hydraulic support; it mainly consists of top beam 1, column, base, cover beam 2, four-bar linkage, and tail beam and plug-in plate Composed of coal discharge mechanism and so on. Its coal discharge mechanism is a two-stage telescopic plate-type coal discharge mechanism; The tail beam 3, the first-level insert plate 4, and the second-stage insert plate 5 are all box-shaped structures welded by steel plates; the tail beam body is provided with a slideway, and the first-stage insert plate 4 is embedded in the slideway of the tail beam body; A slideway is provided in the body of the primary board, and...

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Abstract

The invention discloses a low-position coal-caving hydraulic bracket, which is also called as a two-stage telescopic plugboard type coal-caving hydraulic bracket. The low-position coal-caving hydraulic bracket comprises a top beam 1, a vertical column, a base, a covering beam 2, a four-link mechanism and a coal-caving mechanism and the like, wherein the coal-caving mechanism consists of a tail beam and plugboards; the coal-caving mechanism is a two-stage telescopic plugboard type coal-caving mechanism consisting of the tail beam 3, a first-stage plugboard 4, a second-stage plugboard 5 and a double-telescopic jack 6; the first-stage plugboard is embedded in a sliding channel in a tail beam body; the second-stage plugboard is embedded in a sliding channel in the first-stage plugboard; and the double-telescopic jack is hinged between the tail beam and the second-stage plugboard. The double-telescopic jack is controlled to push the two-stage plugboards to expand and retract so as to close or open a coal-caving opening. The bracket is used for an integrated work surface of a coal mine, and by utilization of the characteristic that the telescopic travel of the two-stage telescopic plugboard type coal-caving mechanism is large, the adaptability of the bracket to the change of the supporting height can be improved; and under the condition of maintaining the length of the shorter plugboard, the covering range of the tail beam and the plugboards in high-position supporting is increased, the contact of the plugboards with a rear conveyer can be avoided when the supporting height is less, and simultaneously, the matching of the rear conveyer is convenient.

Description

technical field [0001] The invention relates to a fully mechanized coal mining top coal caving hydraulic support, in particular to a low-position top coal caving hydraulic support with strong adaptability to the support height of the support and a large telescopic stroke of a coal caving mechanism. Background technique [0002] At present, the coal-caving mechanism of the two-column low-position top-coal caving support used in the fully mechanized caving face of the coal mine adopts a single-stage retractable plate structure. The low-level top-coal caving support adopting this kind of coal caving mechanism, especially when the support height of the two-column low-level top-coal caving support with large mining height is high, it is easy to cause the tail beam inserting plate to be fully extended and cannot fully protect the rear. The problem of the scraper conveyor caused a large amount of gangue to be released and poured into the rear scraper conveyor, affecting normal prod...

Claims

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Application Information

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IPC IPC(8): E21D23/04E21D23/16
Inventor 孟祥军刘健李小平张立亓玉浩曹怀轩
Owner 兖矿能源集团股份有限公司
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