Hydraulic support

A technology of hydraulic support and pressure plate, which is applied in mine roof support, mining equipment, earthwork drilling and mining, etc. It can solve problems such as high equipment maintenance costs, damage to balance jacks, and welding and falling off of stoppers, so as to improve work stability and improve The overall stability and the effect of preventing the welding from falling off

Active Publication Date: 2016-07-20
SHANDONG LUNAN GRP ENERGY EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the following problems still exist in the use of hydraulic supports: 1. After the shearer has finished mining coal, the phenomenon of coal wall and roof falling off often occurs, which directly affects the safety and efficiency of the coal mining face, especially large 2. Poor contact between the lifting jack and the pushing rod affects the frame moving operation; 3. The angle between the cover beam and the top beam often exceeds the limit angle due to poor roof conditions and operational errors, causing damage to the balance jack , resulting in poor support effect of the hydraulic support on the roof, and frequent welding and falling off of the stopper, resulting in high equipment maintenance costs; 4. Due to the extension and retraction of the telescopic beam, the coal brought into the roof beam cannot be discharged, affecting Performance of hydraulic support, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as Figure 1-2 As shown, a hydraulic support includes a top beam 1, a shield beam 2 and a base 4. At the joint between the shield beam 2 and the top beam 1, the length of the top plate of the shield beam 2 is greater than the length of the side plate, and the The difference between the above lengths is 40-60mm. When the hydraulic support is at the lowest height, the top plate end of the cover beam 2 is in contact with the top beam 1, which acts as a limit, protects the balance jack from damage, and helps to improve the overall stability sex.

[0036] The base 4 is provided with a lifting jack 5 and a push rod 6, and the base 4 is located above the push rod 6 and a limit bridge 30 is arranged, and the limit bridge 30 and the push rod 6 are arranged in a non-parallel structure , the maximum distance from the bottom of the limiting bridge 30 to the upper surface of the push rod 6 is less than the maximum distance from the piston end of the lifting jack 5 to the upper...

Embodiment 2

[0042] Such as figure 1 , Figure 3-6 As shown, one end of the top beam 1 is set as a box structure 12, and the other end is set as a cavity structure 11, and the cavity structure 11 is provided with a side protection mechanism 8 and a telescopic beam 10, and the box structure A limit mechanism 17 is set at 12, and the limit mechanism 17 is set as a limit block, the limit block is located at the bottom of the top beam 1, and the limit block is located at 1 / 4-1 / 3 of the top beam 1 At the height, a balance jack is arranged between the top beam 1 and the cover beam 2, and when the hydraulic support is at the highest position, the limit mechanism 17 limits the angle between the cover beam 2 and the top beam 1, It can not only effectively avoid damage to the balance jack, but also enhance the supporting effect of the hydraulic support on the roof and reduce equipment maintenance costs.

[0043] The side protection mechanism 8 includes a first-level side protection board 81 and a ...

Embodiment 3

[0048] Such as Figure 1-8 Shown, the specific working process of described a kind of hydraulic support is as follows:

[0049] (1) Inject the hydraulic medium into the column 3, carry out the lifting operation of the hydraulic support until the top beam 1 is in contact with the top plate above the working surface, and at the same time, start the balance jack to impel the limit mechanism 17 Contact with the cover beam 2, and limit the angle between the cover beam 2 and the top beam 1;

[0050] (2) The telescopic beam 10 performs an extension operation, drives the side protection mechanism 8, and the follow-up limit mechanism 15 to move, starts the jack 2 14, realizes the extension operation of the side protection mechanism 8, and starts the jack -13, to realize the extension operation of the primary side guard 81 until the mechanical limit of the junction of the first level side guard 81 and the second level side guard 82, and the junction of the second level side guard 82 an...

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Abstract

The invention relates to a hydraulic support and belongs to the technical field of coal mining equipment. The hydraulic support comprises a top beam, a shield beam and a base. The base is provided with a base lifting jack and a pushing rod. A limiting crossing bridge is arranged in the position, above the pushing rod, of the base. The base is provided with a lug plate. The cylinder end of the base lifting jack is connected with the lug plate. A sliding block is arranged at the piston end of the base lifting jack. The position, corresponding to the sliding block, of the inner wall of the base is provided with a sliding way. The base is further provided with a vertical pillar fixing part. The hydraulic support has the characteristics that the contact performance of the base lifting jack and the pushing rod is good, the stability of the base lifting jack and a vertical pillar is improved, the maintenance probability is reduced, the work efficiency is improved, and the security coefficient is high.

Description

technical field [0001] The invention belongs to the technical field of coal mine equipment, and in particular relates to a hydraulic support. Background technique [0002] Hydraulic support is a kind of hydraulic power device that uses liquid pressure to generate support force and realizes automatic shifting for roof support and management. It is an indispensable supporting equipment for comprehensive mechanized coal mining. Mining face mine pressure acts on the hydraulic support in the form of external load. Since the mid-1990s, my country's hydraulic supports have entered a stage of rapid development. During this period, fully mechanized mining technology was promoted, and the number of fully mechanized mining working faces in the country has been greatly increased. At the same time, the performance, technical parameters, stability and reliability of hydraulic supports have also been significantly improved, and the types of supports have been continuously enriched. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D23/04E21D23/06E21D23/03E21D23/16
CPCE21D23/03E21D23/04E21D23/063E21D23/16
Inventor 梁开东李福祥张严敬徐亚军崔振严孝伟冯栋李云海赵雯刘超张薇
Owner SHANDONG LUNAN GRP ENERGY EQUIP MFG
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