Double-acting hydraulic mechanism, multi-stage telescopic hydraulic mechanism and hydraulic support

A hydraulic mechanism and double-acting technology, applied in the hydraulic field, can solve the problems of high material performance requirements and small expansion ratio of seals and hydraulic cylinder cylinders, and achieve the effect of increasing expansion ratio and reducing material performance requirements

Inactive Publication Date: 2018-11-30
CATERPILLAR ZHENGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The multi-stage telescopic mechanism applied to the column structure in the prior art has a relatively small expansion and contraction ratio, and has relatively high requirements on the material performance of the seal and the hydraulic cylinder barrel

Method used

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  • Double-acting hydraulic mechanism, multi-stage telescopic hydraulic mechanism and hydraulic support
  • Double-acting hydraulic mechanism, multi-stage telescopic hydraulic mechanism and hydraulic support
  • Double-acting hydraulic mechanism, multi-stage telescopic hydraulic mechanism and hydraulic support

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Experimental program
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Effect test

Embodiment 1

[0049] See attached figure 1 The double-acting hydraulic mechanism provided by Embodiment 1 of the present invention includes a first cylinder body 3, a second cylinder body 7, a first guide sleeve 4, a second guide sleeve 14, a piston rod 5, a piston 6, a first valve seat 32, first valve 15 . The first valve seat 32 is fixedly connected to the proximal end of the first cylinder body 3 (in this embodiment, the first valve seat 32 is welded to the proximal end of the first cylinder body 3 by welding spot 37), and the first valve 15 is set by The first valve hole 36 on the first valve seat 32 is set on the first valve seat 32; the second cylinder 7 is sleeved in the first cylinder 3, and the first guide sleeve 4 is fixedly connected to the second cylinder 7 The proximal end and the inner wall of the first cylinder 3 form a sliding pair, the second guide sleeve 14 is fixedly connected to the inner wall of the first cylinder 3, and the inner cavity of the first cylinder 3 is divi...

Embodiment 2

[0055] See attached figure 2 The multi-stage telescopic hydraulic mechanism provided by Embodiment 2 of the present invention includes the outermost cylinder 1 , several intermediate cylinders 2 , the double-acting hydraulic mechanism provided by the present invention, the second valve seat 49 , and the second valve 13 . A number of intermediate cylinders 2 are nested in layers one by one, and form a sliding pair between each other; the double-acting hydraulic mechanism is nested in the innermost intermediate cylinder 2, and the first cylinder 3 and the innermost intermediate cylinder 2 A sliding pair is formed between the inner walls; the innermost intermediate cylinder body 2 is provided with a fifth cavity 19, and when the first valve 15 is in an open state, the fifth cavity 19 passes through the first valve hole 36 and the second cavity 25 communicates; the second valve seat 49 is fixedly connected to the proximal end of the innermost intermediate cylinder body 2, and the...

Embodiment 3

[0063] The hydraulic support provided by Embodiment 3 of the present invention includes the multi-stage telescopic hydraulic mechanism provided by the present invention, the column head (8), and the column head (8) is fixedly connected to the distal end of the second cylinder (7).

[0064] The hydraulic support provided in the third embodiment of the present invention applies the multi-stage telescopic hydraulic mechanism provided in the second embodiment of the present invention. Therefore, the hydraulic support can also increase the expansion and contraction ratio under the condition of low hydraulic oil pressure, and reduce the sealing cost. and cylinder material performance requirements.

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PUM

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Abstract

The invention discloses a double-action hydraulic mechanism, a multi-grade retractable hydraulic mechanism and a hydraulic bracket and belongs to the technical field of hydraulic pressure. The double-action hydraulic mechanism comprises a first cylinder body 3, a second cylinder body 7, a first guide sleeve 4, a second guide sleeve 14, a piston rod 5, a piston 6, a first valve seat 32 and a first valve 25. The multi-grade retractable hydraulic mechanism comprises an outermost-side cylinder body 1, a plurality of middle cylinder bodies 2, the double-action hydraulic mechanism provided by the invention, a second valve seat 49 and a second valve 13. The hydraulic bracket comprises the multi-grade retractable hydraulic mechanism provided by the invention and a column head 8. The double-action hydraulic mechanism, the multi-grade retractable hydraulic mechanism and the hydraulic bracket, provided by the invention, have a relatively large contraction ratio; and the double-action hydraulic mechanism is introduced so that performance requirements on materials of a sealing part and a cylinder barrel are reduced.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a double-acting hydraulic mechanism, a multi-stage telescopic hydraulic mechanism and a hydraulic support. Background technique [0002] The service life of hydraulic supports is generally 5 to 10 years, and the service life of high-end supports can reach more than 10 years. During the entire service period, supports often need to be installed in different coal seams or even different mines. In addition, in order to facilitate equipment management, many coal groups hope to reduce the type of support, which requires the support to have versatility. There is a broad market demand for hydraulic supports that can be applied to multiple mines and various coal seams. [0003] The adaptability to the thickness of the coal seam and its changes is an important factor restricting the versatility of the support, and the column structure is the key factor affecting the performance of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/16
CPCF15B15/16
Inventor 胡玉珊贾洪现倪明飞吕涛
Owner CATERPILLAR ZHENGZHOU
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