Unit type constant-resistance elastic yielding anti-impact hydraulic support and working method thereof

A hydraulic support and unitized technology, applied in the direction of pillars/supports, earth square drilling, mining equipment, etc., can solve problems such as roof fall accidents, replacement only, secondary damage, etc., to improve work efficiency, reduce equipment losses, The effect of preventing failure

Inactive Publication Date: 2019-07-09
张治高
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the roof will rebound after impacting the ground, but the hydraulic column cannot rebound after shrinking, and cannot restore the initial support force in time, resulting in the impact area being in an unsupported state under the empty roof, which is likely to cause a roof fall accident and cause secondary damage. Injury; and the shrinkage cannot be used again, it is a one-time use and can only be replaced

Method used

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  • Unit type constant-resistance elastic yielding anti-impact hydraulic support and working method thereof
  • Unit type constant-resistance elastic yielding anti-impact hydraulic support and working method thereof
  • Unit type constant-resistance elastic yielding anti-impact hydraulic support and working method thereof

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Embodiment Construction

[0020] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 , 2 As shown, a double-column constant-resistance elastic yielding pressure anti-shock hydraulic support is composed of a support top beam 1, a support base 5, a double hydraulic column 2 and a safety valve 4, and a fixing device 10 is arranged between the double hydraulic columns 2. The emulsion chamber of the hydraulic column 2 is connected to the safety valve 4 through the high-pressure pipe 3, and the working pressure of the safety valve 4 is 40Mpa; wherein, an energy storage device is installed on the bracket base 5; the energy storage device is A hydraulic jack 9 is provided in an energy storage chamber 7, and a pressure spring 8 is provided on the top surface of the hydraulic jack 9. The liquid chamber of the hydraulic jack 9 communicates with the liquid chamber of the double hydraulic column 2 through a large-f...

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Abstract

The invention discloses a unit type constant-resistance elastic yielding anti-impact hydraulic support which is composed of a support top beam, a support base, two hydraulic stand columns and a safetyvalve and is characterized by further comprising an energy storage device installed on the support base. When the static pressure of a top plate and a bottom plate of a roadway is greater than 40 Mpa, the safety valve is automatically opened to discharge part of emulsion for unloading; when an impact dynamic pressure of the top plate of the roadway is greater than 41.5 Mpa, impact energy is stored in a pressure spring, and the support is prevented from being broken and toppled; and when the top plate rebounds after the impact energy is released, the energy of the pressure spring is released along with the rebounding of the top plate, the emulsion is promoted to return to a liquid cavity of the hydraulic stand columns, and hydraulic jacks return to an original retraction state.

Description

technical field [0001] The invention relates to coal mine roadway support technology, in particular to a roadway advance support bracket. Background technique [0002] At present, in the advanced support of coal mine roadway, the unit type advanced hydraulic support is usually used. The structure of the support is composed of the support top beam, support base, double hydraulic columns and safety valve (pressure relief valve); between the two hydraulic columns Equipped with a fixing device, the emulsion chamber of the double hydraulic column is connected to the safety valve through a high-pressure pipe. When the static pressure of the roadway roof and floor is greater than 40Mpa, the safety valve can release part of the emulsion to unload, so that the hydraulic support always bears the constant resistance pressure less than 40Mpa to prevent the hydraulic support from being crushed. However, when the impact pressure suddenly occurs on the roof and floor of the roadway, due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/45E21D15/54
CPCE21D15/45E21D15/545
Inventor 张治高赵健王存文刘虎顾鹏卢绪涛王浩翟所业
Owner 张治高
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