CN-224214150-U - Anti-eruption device for gas extraction pipeline

Abstract

The utility model belongs to the technical field of gas extraction, in particular to an anti-explosion device for a gas extraction pipeline, which comprises a cover block, wherein a first through groove is formed in the middle of the cover block, a first annular groove is formed in the inner wall of the first through groove, a second annular groove is formed in the top end of the first annular groove, a group of bolt columns are formed in the outer side wall of the cover block, symmetrically distributed air outlet pipes are formed in the cover block, the air outlet pipes are communicated with the second annular groove, and a buffer piece is arranged in the second annular groove.

Inventors

• LUO WEI
• WANG XIAOCHENG
• LI JIE
• CHEN LIWEI
• CHANG YU
• WANG LIN
• LIU JUN
• YUAN JUNWEI
• XU YANPENG
• CHEN QING
• ZHAI XUE

Assignees

• 河南理工大学

Dates

Publication Date

20260508

Application Date

20250624

Claims (6)

1. 1. The anti-explosion device for the gas extraction pipeline is characterized by comprising a cover block, wherein a first through groove is formed in the middle of the cover block, a first annular groove is formed in the inner wall of the first through groove, a second annular groove is formed in the top end of the first annular groove, a group of bolt columns are formed in the outer side wall of the cover block, symmetrically distributed air outlet pipes are formed in the cover block, the air outlet pipes are mutually communicated with the second annular groove, and a buffer piece is arranged in the second annular groove.
2. 2. The blowout prevention device for the gas extraction pipeline according to claim 1, wherein an annular filter screen is fixedly connected between the bottom end and the top end of the first annular groove, and the cross section of the annular filter screen is in an isosceles trapezoid shape.
3. 3. The blowout prevention device for the gas extraction pipeline according to claim 2, wherein the buffer piece comprises an annular sealing plate, the annular sealing plate is connected in the second annular groove in a sealing sliding mode, a group of buffer springs are fixedly connected to the top end of the annular sealing plate and fixedly connected to the bottom of the second annular groove, a positioning plate is fixedly connected to the outer annular wall of the second annular groove and positioned below the annular sealing plate, and the air outlet pipe is positioned above the positioning plate.
4. 4. The blowout prevention device for the gas extraction pipeline according to claim 3, wherein the top end of the cover block is fixedly connected with a pair of symmetrically distributed arc-shaped inverted L-shaped plates, the inner wall of each arc-shaped inverted L-shaped plate is provided with a half arc groove, the top end of each annular sealing plate is fixedly connected with a fixing column, and the top ends of the fixing columns extend out of the cover block and slide in the half arc grooves.
5. 5. The blowout prevention device for the gas extraction pipeline according to claim 4, wherein a positive plate is fixedly connected to the bottom end of a horizontal plate of the arc-shaped inverted L-shaped plate, a negative plate is fixedly connected to the top end of the fixing column, an alarm lamp is fixedly connected to the top end of the arc-shaped inverted L-shaped plate, and the alarm lamp alarms when the positive plate and the negative plate are in contact with each other.
6. 6. The blowout prevention device for the gas extraction pipeline according to claim 5 is characterized in that a first groove is formed in the inner arc wall of the arc-shaped inverted L-shaped plate, a clamping block is connected in a sliding mode in the first groove, a moving plate is connected in a sliding mode in the first groove and connected with the moving plate through a spring and the clamping block, a first threaded rod is connected to the side wall of the moving plate in a rotating mode, the end portion of the first threaded rod extends out of the arc-shaped inverted L-shaped plate and is connected to the extending portion in a threaded mode, and an annular clamping groove is formed in the side wall of the fixed column.

Description

Anti-eruption device for gas extraction pipeline Technical Field The utility model belongs to the technical field of gas extraction, and particularly relates to an anti-explosion device for a gas extraction pipeline. Background The gas extraction is a core technology in the coal mine safety production, and is mainly used for actively reducing the content and pressure of gas (the main component is methane) in a coal bed so as to eliminate accident hidden dangers such as gas outburst, explosion and the like, and when in drilling construction, the pressure imbalance of the coal bed is easy to cause instantaneous high-speed ejection (spray holes) of coal rock particles and gas, and the blowout preventer inhibits the impact of splashes through a buffer cavity (such as a dust box and a separation box) or negative pressure extraction, so that the casualties and equipment damage are avoided. In the prior art, holes are required to be drilled in gas extraction to form extraction pipelines, but when the holes are drilled, excessive coal gas or coal dust or stone impurities are sprayed out when the holes penetrate through some coal gas enrichment areas, surrounding personnel can be injured, and early warning operation cannot be performed at the first time. Therefore, the utility model provides an anti-eruption device for a gas extraction pipeline. Disclosure of utility model In order to make up for the deficiencies of the prior art, the problems presented in the background art are solved. The technical scheme includes that the anti-explosion device for the gas extraction pipeline comprises a cover block, a first through groove is formed in the middle of the cover block, a first annular groove is formed in the inner wall of the first through groove, a second annular groove is formed in the top end of the first annular groove, a group of bolt columns are formed in the outer side wall of the cover block, symmetrically distributed air outlet pipes are formed in the cover block, the air outlet pipes are communicated with the second annular groove, and a buffer piece is arranged in the second annular groove. Preferably, an annular filter screen is fixedly connected between the bottom end and the top end of the first annular groove, and the section of the annular filter screen is in an isosceles trapezoid shape. Preferably, the buffer piece comprises an annular sealing plate, the annular sealing plate is connected in the second annular groove in a sealing sliding manner, a group of buffer springs are fixedly connected to the top end of the annular sealing plate, the top ends of the buffer springs are fixedly connected to the bottom of the second annular groove, a positioning plate is fixedly connected to the outer annular wall of the second annular groove, the positioning plate is located below the annular sealing plate, and the air outlet pipe is located above the positioning plate. Preferably, the top end of the cover block is fixedly connected with a pair of symmetrically distributed arc-shaped inverted L-shaped plates, a half arc groove is formed in the inner wall of each arc-shaped inverted L-shaped plate, the top end of each annular sealing plate is fixedly connected with a fixing column, and the top ends of the fixing columns extend out of the cover block and slide in the half arc groove. Preferably, the bottom end of the horizontal plate of the arc-shaped inverted L-shaped plate is fixedly connected with a positive plate, the top end of the fixing column is fixedly connected with a negative plate, the top end of the arc-shaped inverted L-shaped plate is fixedly connected with an alarm lamp, and the alarm lamp alarms when the positive plate and the negative plate are in contact with each other. The movable plate is connected with the fixed column through a spring, a first threaded rod is connected to the side wall of the movable plate in a rotating mode, the end portion of the first threaded rod extends out of the arc-shaped inverted L-shaped plate and is connected to the extending portion in a threaded mode, and an annular clamping groove is formed in the side wall of the fixed column. The beneficial effects of the utility model are as follows: 1. According to the blowout prevention device for the gas extraction pipeline, the cover block is covered at the drilling extraction pipeline and fixed through the bolt column, so that the first through groove and the drilling position are correspondingly operated, when the drilling operation is performed, once the operation of the spraying holes occurs, the first through groove can be covered by the drilling device, the flushed gas and other impurities can be directly blocked by the cover block, the influence on the external environment is avoided, meanwhile, the outwards splashed gas can be buffered by the buffer piece, early warning is performed, the splashed gas is collected, and the interference and influence on external personnel are avoided. 2. According to the anti-exp