CN-224214118-U - Collapse preventing device for gas extraction

CN224214118UCN 224214118 UCN224214118 UCN 224214118UCN-224214118-U

Abstract

The utility model belongs to the technical field of gas extraction, in particular to a collapse prevention device for gas extraction, which comprises a supporting cylinder and a push rod, wherein a first annular groove is formed in an opening of the inner wall of the supporting cylinder, the end part of the push rod is placed in the first annular groove, the section of the push rod is T-shaped, the interior of the push rod is hollow, a group of first cavities are formed in the supporting cylinder, a group of guide posts are fixedly connected in the first cavities, an arc plate is connected to the inner wall of the first cavities in a sliding manner and sleeved on the guide posts in a sliding manner, a group of clamping posts are fixedly connected to the outer side wall of the arc plate, a group of clamping holes are formed in the outer side wall of the supporting cylinder, the clamping posts are opposite to the clamping holes, and the arc plate moves through a pushing piece.

Inventors

FAN RONG
CHEN LIWEI
XU YANPENG
CHEN JINSHENG
WANG LIN
CHEN QING
GUO HUAIGUANG
LI JIE

Assignees

河南理工大学

Dates

Publication Date: 20260508
Application Date: 20250611

Claims (6)

1. The collapse preventing device for gas extraction is characterized by comprising a supporting cylinder and a push rod, wherein a first annular groove is formed in an opening of the inner wall of the supporting cylinder, the end part of the push rod is placed in the first annular groove, the section of the push rod is T-shaped, the interior of the push rod is hollow, a group of first cavities are formed in the supporting cylinder, a group of guide posts are fixedly connected in the first cavities, an arc plate is connected to the inner wall of the first cavities in a sliding mode, the arc plate is sleeved on the guide posts in a sliding mode, a group of clamping columns are fixedly connected to the outer side wall of the arc plate, a group of clamping holes are formed in the outer side wall of the supporting cylinder, the clamping columns are opposite to the clamping holes, and the arc plate moves through a pushing piece.
2. The collapse preventing device for gas extraction is characterized in that the pushing piece comprises a first annular plate, the first annular plate is connected in a sliding mode in the first cavity, the section of the first annular plate is of an inverted L shape, a group of arc-shaped grooves are formed in one side end face of the first annular plate, sliding columns are connected to the side walls of the end portions of the arc-shaped plates in a rotating mode, and the sliding columns are connected in the arc-shaped grooves in a sliding mode.
3. The collapse preventing device for gas extraction is characterized in that an annular through groove is formed in the inner wall of the first annular groove, the annular through groove is communicated with the first cavity, a rotating rod is rotatably connected inside the push rod, a rotating plate is fixedly connected to the rotating rod, and arc-shaped through grooves which are symmetrically distributed are formed in the outer side wall of the push rod.
4. The collapse preventing device for gas extraction according to claim 3, wherein a group of first teeth are fixedly connected to the inner wall of the first annular plate and extend out through the annular through grooves, a group of second teeth are fixedly connected to the two ends of the rotating plate and extend out through the arc-shaped through grooves.
5. The collapse preventing device for gas extraction according to claim 4, wherein symmetrically distributed fixing grooves are formed in the groove bottom of the first annular groove, and fixing blocks are fixedly connected to the end portion of the push rod relative to the fixing grooves.
6. The collapse preventing device for gas extraction is characterized in that an insertion hole is formed in the fixing block, an insertion groove is formed in the side wall of the fixing groove, the insertion groove is communicated with the first cavity, an insertion column is slidably arranged in the insertion groove, a second arc-shaped block is fixedly connected to the end portion of the insertion column, a first arc-shaped block is fixedly connected to the side wall of the first annular plate, and the second arc-shaped block is fixedly connected to the side wall of the first cavity through a spring.

Description

Collapse preventing device for gas extraction Technical Field The utility model belongs to the technical field of gas extraction, and particularly relates to a collapse prevention device for gas extraction. Background The underground drilling gas extraction has the advantages of simple construction, low cost and the like, and is widely applied to the gas control of coal mines in China. However, due to the influence of the ground stress, the gas pressure and other factors, the problem of hole drilling and hole collapse is serious in the gas extraction process of the soft coal seam, and due to the fact that the hole drilling and hole collapse blocks a channel for outward flow of gas, the efficient extraction of the gas and the underground gas control are obviously influenced, so that the safety production of a mine is influenced, and a protection barrel is arranged at a position easy to collapse in the prior art to prevent hole collapse. In the prior art, when the protection barrel is put in, the clamping mechanism of the protection barrel embedded into the coal seam is generally put out, and during insertion, the clamping mechanism generally collides with the inner wall of the extraction hole to influence the insertion state, such as a method for preventing the upward gas extraction hole from collapsing at a fixed point of the patent application number CN202010523587.X, wherein the barb mechanism cannot be generally stored during insertion to influence the insertion effect. Therefore, the utility model provides a collapse prevention device for gas extraction. 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 collapse preventing device for gas extraction comprises a supporting cylinder and a pushing rod, wherein a first annular groove is formed in an opening of the inner wall of the supporting cylinder, the end portion of the pushing rod is placed in the first annular groove, the cross section of the pushing rod is T-shaped, the inside of the pushing rod is hollow, a group of first cavities are formed in the supporting cylinder, a group of guide posts are fixedly connected in the first cavities, an arc plate is connected to the inner wall of the first cavities in a sliding mode and sleeved on the guide posts in a sliding mode, a group of clamping columns are fixedly connected to the outer side wall of the arc plate, a group of clamping holes are formed in the outer side wall of the supporting cylinder, the clamping columns are opposite to the clamping holes, and the arc plate moves through pushing pieces. The pushing piece comprises a first annular plate, the first annular plate is connected with the first cavity in a sliding mode, the section of the first annular plate is in an inverted L shape, a group of arc grooves are formed in the end face of one side of the first annular plate, sliding columns are connected to the side wall of the end portion of the arc plate in a rotating mode, and the sliding columns are connected in the arc grooves in a sliding mode. Preferably, an annular through groove is formed in the inner wall of the first annular groove, the annular through groove is communicated with the first cavity, a rotating rod is rotatably connected inside the push rod, a rotating plate is fixedly connected to the rotating rod, and symmetrically distributed arc-shaped through grooves are formed in the outer side wall of the push rod. Preferably, a group of first teeth are fixedly connected to the inner wall of the first annular plate, the first teeth extend out through the annular through grooves, a group of second teeth are fixedly connected to the two ends of the rotating plate, and the second teeth extend out through the arc-shaped through grooves. Preferably, the bottom of the first annular groove is provided with symmetrically distributed fixing grooves, and the end part of the push rod is fixedly connected with a fixing block relative to the fixing grooves. Preferably, the fixed block is provided with an insertion hole, the side wall of the fixed groove is provided with an insertion groove, the insertion groove is communicated with the first cavity, an insertion column is slidably arranged in the insertion groove, the end part of the insertion column is fixedly connected with a second arc-shaped block, the side wall of the first annular plate is fixedly connected with a first arc-shaped block, and the second arc-shaped block is fixedly connected with the side wall of the first cavity through a spring. The beneficial effects of the utility model are as follows: 1. According to the collapse prevention device for gas extraction, the end part of the push rod is located in the first annular groove of the supporting cylinder, then the push rod is pushed to insert the supporting cylinder into the extraction hole of the coal seam, the end part of the clamping column does not