Bracket gas extraction device

Abstract

The utility model belongs to the technical field of fully mechanized coal mining face gas extraction, and particularly relates to a support gas extraction device. Comprising a hollow box body; the hollow box is fixed to the top of a top beam of the support, a ventilation channel which is communicated in the front-back direction of the support is arranged in the hollow box, a negative pressure hose is connected to the position, at the front end of the support, of the hollow box, sieve holes are formed in the rear end of the support, and the negative pressure hose is communicated with the sieve holes through the ventilation channel. The bracket gas extraction device provided by the utility model is arranged at the upper end of the top beam of the bracket, so that normal production of a working surface and pedestrians are not influenced; the device can move along with the bracket; the hollow box body of the device is divided into five independent ventilation channels which do not interfere with one another and can be used independently, and the hollow box body can be used for directly extracting gas behind a rack; the device is provided with the coal baffle, so that large carbon blocks are prevented from being sucked into the channel to cause blockage; the device is provided with the side protecting plates, so that waste rock leakage between frames is prevented; the device is made of a Q690 high-strength plate, and it can be guaranteed that the support can normally support the top plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas extraction in fully mechanized mining working faces, and in particular relates to a support gas extraction device. Background Art

[0002] In order to better save resources and recover coal resources scientifically and efficiently, the current mining face design is gradually developing towards pillarless mining. Pillarless mining generally adopts "W" type ventilation. Compared with "Y" type or "U" type ventilation, "W" type ventilation cannot lay drainage pipes in the goaf to extract gas behind the mining rack, which can easily lead to gas accumulation behind the head support rack, affecting normal production.

[0003] In order to solve the problem of gas accumulation behind the racks, the current method of hanging wind tents and negative pressure hoses between racks to extract gas from the goaf is mainly used to reduce the impact of gas in the goaf on the working face. This method seriously affects the normal pedestrians on the working face, and it is easy to squeeze and break the negative pressure hose when pulling and moving the racks. In addition, the gap between the racks is small, which can easily cause the wind tent to be pulled off during the process of pulling and moving the racks, resulting in abnormal gas outflow in the goaf, and ultimately resulting in unsatisfactory gas extraction results. Utility Model Content

[0004] The utility model is designed to solve the problem of gas accumulation behind the "W"-shaped ventilation head support in the fully mechanized mining working face.

[0005] The utility model provides the following technical solution: a bracket gas extraction device, comprising a hollow box body; the hollow box body is fixed on the top of the top beam of the bracket, a ventilation channel is provided in the hollow box body and is connected to the front end of the bracket with a negative pressure hose, and a sieve hole is provided on the rear end of the bracket, and the negative pressure hose and the sieve hole are connected through the ventilation channel.

[0006] Furthermore, a supporting partition is provided in the hollow box, which divides the interior of the hollow box into a plurality of ventilation channels which are arranged in the left-right direction of the bracket and are independent of each other; both ends of each ventilation channel are connected to the sieve hole and the negative pressure hose.

[0007] Furthermore, a pad is provided in the hollow box, the pad is perpendicularly intersected with the supporting partition, the pad is arranged at intervals along the front-to-back direction of the bracket, and a through hole is opened on the pad corresponding to each ventilation channel.

[0008] Furthermore, a coal blocking plate is arranged on the hollow box body above the sieve hole.

[0009] Furthermore, a side guard plate is fixedly mounted on the hollow box body, and the side guard plate is located in the opposite direction of the movable side guard plate of the top beam of the bracket.

[0010] Furthermore, fixing plates are installed on the hollow box body on the left and right sides of the bracket, and the fixing plates on both sides clamp the hollow box body on the top of the top beam of the bracket, and the hollow box body and the fixing plates are welded to the top beam of the bracket.

[0011] Furthermore, a flange is installed on the hollow box at the position of each ventilation channel, the flange is communicated with the ventilation channel, and the negative pressure hose is connected to the flange.

[0012] Furthermore, the hollow box body is divided into five ventilation channels by the supporting partitions, and the five ventilation channels are symmetrical with respect to the midline of the top beam of the bracket in the left and right directions.

[0013] Furthermore, the front end of the hollow box is bent downward.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model provides a support gas extraction device, which is installed at the upper end of the support top beam and does not affect the normal production of the working face and pedestrians; the device can move with the support; the hollow box of the device is divided into 5 independent ventilation channels, which can be used independently without interfering with each other, and the hollow box can directly extract the gas behind the support, fundamentally solving the problem; the device is provided with a coal blocking plate to prevent large pieces of carbon from being sucked into the channel and causing blockage; the device is installed with side guard plates to prevent gangue leakage between the frames; the device is made of Q690 high-strength plate, which can ensure that the support can normally support the roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A-direction view;

[0018] Figure 3 for Figure 1 B-direction view;

[0019] Figure 4 for Figure 1 C-direction view.

[0020] In the figure: 1-hollow box; 2-negative pressure hose; 3-fixed plate; 4-side guard plate; 5-support partition; 6-coal retaining plate; 7-sieve hole; 8-flange; 9-bracket; 10-ventilation channel; 11-top beam; 12-pad. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: a gas extraction device for a bracket includes a hollow box 1; the hollow box 1 is fixed to the top of the top beam 11 of the bracket, and a ventilation channel 10 is provided in the hollow box 1 along the front and rear directions of the bracket. A negative pressure hose 2 is connected to the hollow box 1 at the front end of the bracket, and a sieve hole 7 is provided at the rear end of the bracket. The negative pressure hose 2 and the sieve hole 7 are connected through the ventilation channel 10.

[0023] A supporting partition 5 is provided in the hollow box 1, and the supporting partition 5 divides the interior of the hollow box 1 into a plurality of ventilation channels 10 arranged in the left-right direction of the bracket and independent of each other; both ends of each ventilation channel 10 are connected to the sieve hole 7 and the negative pressure hose 2. The diameter of the sieve hole 7 is 6-8 mm, and each ventilation channel 10 is equipped with a plurality of sieve holes 7, so that gas can enter the ventilation channel 10.

[0024] Specifically, the hollow box 1 is divided into five ventilation channels 10 by the supporting partition 5, and the five ventilation channels 10 are symmetrical with respect to the midline of the left and right directions of the top beam 11 of the bracket. The five ventilation channels 10 do not interfere with each other and can be used independently, so as to prevent a ventilation channel 10 from being blocked or cracked, causing the entire device to not work properly.

[0025] A pad 12 is provided in the hollow box 1, the pad 12 is perpendicularly intersected with the supporting partition 5, the pads 12 are arranged at intervals along the front and rear direction of the bracket, and a through hole is opened on the pad 12 corresponding to each ventilation channel 10. The pad 12 is provided in the hollow box 1 to increase its strength and ensure that the bracket 9 can normally connect to the top support plate.

[0026] A coal blocking plate 6 is arranged above the sieve hole 7 on the hollow box body 1 to prevent large pieces of carbon and other debris from being sucked into the box body 1 and causing blockage when gas is extracted.

[0027] A side guard plate 4 is fixedly mounted on the hollow box body 1 to replace the original side guard plate of the bracket to prevent gangue leakage due to large spacing between the brackets when the brackets are pulled. The side guard plate 4 is located in the opposite direction of the movable side guard plate of the top beam 11 of the bracket.

[0028] Fixed plates 3 are installed on the left and right sides of the bracket on the hollow box body 1. The fixed plates 3 on both sides clamp the hollow box body 1 on the top of the top beam 11 of the bracket. The hollow box body 1 and the fixed plates 3 are welded to the top beam 11 of the bracket, so that the hollow box body 1 and the top beam 11 become a whole, and the bracket 9 can move the rack with the device.

[0029] The bracket gas extraction device is made of Q690 high-strength plate to ensure that the bracket 9 can normally support the top plate.

[0030] A flange 8 is installed on the hollow box 1 at the position of each ventilation channel 10, the flange 8 is connected to the ventilation channel 10, and the negative pressure hose 2 is connected to the flange 8. Five hoses with negative pressure are connected to the five independent channels 10 of the hollow box 1 through the flange 8, and the gas behind the bracket 9 is extracted through the sieve hole 7 at the rear of the hollow box 1 to avoid abnormal gas outflow caused by gas accumulation behind the bracket and gas over-limit accidents.

[0031] The front end of the hollow box body 1 is bent downward to prevent the negative pressure hose 2 from interfering with the tunnel roof and to prevent the anchor rods and cables in front of the support from hitting the flange 8 or the negative pressure hose 2 .

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bracket gas extraction device, characterized in that: The invention comprises a hollow box (1); the hollow box (1) is fixed on the top of a top beam (11) of a support; a ventilation channel (10) is provided in the hollow box (1) and is connected along the front-rear direction of the support; a negative pressure hose (2) is connected to the front end of the support on the hollow box (1); a sieve hole (7) is provided at the rear end of the support; the negative pressure hose (2) and the sieve hole (7) are connected via the ventilation channel (10).

2. A bracket gas extraction device according to claim 1, characterized in that: A supporting partition (5) is arranged inside the hollow box (1), and the supporting partition (5) divides the interior of the hollow box (1) into a plurality of ventilation channels (10) arranged in the left-right direction of the bracket and independent of each other; both ends of each ventilation channel (10) are connected to the sieve hole (7) and the negative pressure hose (2).

3. A bracket gas extraction device according to claim 2, characterized in that: A pad (12) is arranged in the hollow box (1), the pad (12) and the supporting partition (5) are perpendicularly intersected, the pads (12) are arranged at intervals along the front-to-back direction of the bracket, and a through hole is opened on the pad (12) corresponding to each ventilation channel (10).

4. A bracket gas extraction device according to claim 3, characterized in that: A coal blocking plate (6) is arranged above the sieve hole (7) on the hollow box body (1).

5. A bracket gas extraction device according to any one of claims 1 to 4, characterized in that: A side guard plate (4) is fixedly mounted on the hollow box body (1), and the side guard plate (4) is located in the opposite direction of the movable side guard plate of the top beam (11) of the bracket.

6. A bracket gas extraction device according to any one of claims 1 to 4, characterized in that: The hollow box body (1) is provided with fixing plates (3) on the left and right sides of the bracket, and the fixing plates (3) on both sides clamp the hollow box body (1) on the top of the top beam (11) of the bracket, and the hollow box body (1) and the fixing plates (3) are welded to the top beam (11) of the bracket.

7. A bracket gas extraction device according to claim 2, characterized in that: A flange (8) is installed on the hollow box body (1) at the position of each ventilation channel (10); the flange (8) is communicated with the ventilation channel (10), and the negative pressure hose (2) is connected to the flange (8).

8. A bracket gas extraction device according to claim 2, characterized in that: The hollow box body (1) is divided into five ventilation channels (10) by a supporting partition (5), and the five ventilation channels (10) are symmetrical with respect to the midline of the top beam (11) of the bracket in the left and right directions.

9. A bracket gas extraction device according to claim 1, characterized in that: The front end of the hollow box body (1) is bent downward.

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