Coal mine gas extraction hole sealing device

Abstract

The utility model belongs to the technical field of gas extraction, and particularly relates to a coal mine gas extraction hole sealing device. A coal mine gas extraction hole sealing device comprises an extraction pipe, and a hole sealing mechanism, a sealing mechanism and two fixing mechanisms are arranged on the extraction pipe. The hole sealing mechanism comprises an annular check block, a plug, an internal thread sleeve, a driving motor, a screw rod and an air outlet pipe, the annular check block is fixedly installed in the extraction pipe, the plug is arranged in the extraction pipe, the annular check block is matched with the plug, the internal thread sleeve is fixedly installed on the top of the plug, and the driving motor is arranged on the screw rod. And the driving motor is fixedly installed at the top of the extraction pipe, the screw rod is installed in the internal thread sleeve in a threaded mode, and the top end of the screw rod is fixedly connected with an output shaft of the driving motor. The coal mine gas extraction hole sealing device has the advantages that the coal mine gas extraction hole can be plugged and sealed, gas leakage is avoided, and gas extraction is not affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas extraction, especially relates to a coal mine gas extraction hole sealing device. BACKGROUND

[0002] Mine gas is one of the main dangerous factors threatening the safety of coal mines, in order to eliminate the gas threat in fully mechanized coal mining, many coal mines use the method of pre-extraction of gas to control the coal seam gas. A common method for gas extraction at present is underground drilling extraction, that is, a drilling machine is used to drill extraction holes along the coal seam, and then the constructed extraction holes are connected with the pipeline of the coal mine gas extraction equipment, and the gas extraction is carried out by using a pump or an air extractor.

[0003] The patent with publication number CN219932120U discloses a coal mine gas extraction hole sealing device, which comprises a sleeve, a threaded column is connected through the inside of the sleeve, one end of the threaded column is fixedly connected with a connecting plate, the inner side wall of the connecting plate is fixedly connected with a protruding block, the protruding block is embedded in the inside of a ring groove, the ring groove is formed in the surface of a rubber pad, and the device can fully seal the gas hole, thereby completely sealing the extraction hole of the gas, and effectively preventing the leakage of the gas.

[0004] However, the above structure still has some deficiencies, the extraction plugging device is completely plugged by the concrete and the rubber pad during use, and when it is necessary to extract the gas again, the plugging device needs to be removed, and gas leakage will occur during removal, which is inconvenient.

[0005] Therefore, it is necessary to provide a new coal mine gas extraction hole sealing device to solve the above technical problems. UTILITY MODEL CONTENT

[0006] The utility model solves the technical problem of providing a coal mine gas extraction hole sealing device which can plug and seal the coal mine gas extraction hole, avoid gas leakage, and not affect the gas extraction.

[0007] In order to solve the above technical problems, the coal mine gas extraction hole sealing device provided by the utility model comprises an extraction pipe, a hole sealing mechanism, a sealing mechanism and two fixing mechanisms are arranged on the extraction pipe.

[0008] The hole sealing mechanism comprises a ring-shaped stopper, a plug, an internally-threaded sleeve, a driving motor, a screw rod and an air outlet pipe, the ring-shaped stopper is fixedly installed in the extraction pipe, the plug is arranged in the extraction pipe, the ring-shaped stopper and the plug are matched, the internally-threaded sleeve is fixedly installed on the top of the plug, the driving motor is fixedly installed on the top of the extraction pipe, the screw rod is threadedly installed in the internally-threaded sleeve, and the top end of the screw rod is fixedly connected with the output shaft of the driving motor.

[0009] As a further scheme of the utility model, the sealing mechanism comprises two annular air cavities, an air duct, two air bags, an air inlet pipe and a valve, the two annular air cavities and the air duct are both arranged on the extraction pipe, the annular air cavities and the air duct are communicated, the two air bags are both fixedly sleeved on the extraction pipe, the air inlet pipe is fixedly installed on the top of the extraction pipe, and the valve is installed on the air inlet pipe.

[0010] As a further scheme of the utility model, the fixing mechanism comprises a mounting groove, a hydraulic cylinder and a positioning plate, the mounting groove is arranged on the outer wall of the extraction pipe, the hydraulic cylinder is fixedly installed in the mounting groove, and the positioning plate is fixedly installed on the output shaft of the hydraulic cylinder.

[0011] As a further scheme of the utility model, two limiting pipes are fixedly installed on the inner wall of the top of the extraction pipe, two limiting rods are fixedly installed on the top of the plug, the top end of each of the two limiting rods extends into the limiting pipe, and a circular plate is fixedly installed on the top end of each of the two limiting rods.

[0012] As a further scheme of the utility model, a plurality of circular holes are arranged on the extraction pipe, the circular holes make the annular air cavities and the air bags communicated, and the outer surface of each of the two air bags is arranged in a corrugated shape.

[0013] As a further scheme of the utility model, each of the two positioning plates is in an arc shape, and an anti-skid pattern is arranged on the outer wall of each of the two positioning plates.

[0014] Compared with the related art, the coal mine gas extraction hole sealing device has the following beneficial effects:

[0015] 1、The hole sealing mechanism is arranged, so that the plug is moved upward to be separated from the ring-shaped stopper, and the gas in the coal mine gas extraction hole is extracted through the air outlet pipe;

[0016] 2、The sealing mechanism is arranged, so that the air bag is inflated to be attached to the inner wall of the extraction hole by collision, and the extraction hole is sealed;

[0017] 3. The utility model discloses a fixed mechanism is set up, can be positioned board top in the inner wall of the extraction hole, the sealing device is fixed in the extraction hole, and the sealing device can be avoided by the impact of gas, displacement appears in the extraction hole. BRIEF DESCRIPTION OF DRAWINGS

[0018] For the convenience of those skilled in the art, the utility model will be further explained below in conjunction with the drawings.

[0019] Figure 1 The whole structure schematic diagram of the coal mine gas extraction hole sealing device provided by the utility model is provided;

[0020] Figure 2 The first sectional structure schematic diagram of the coal mine gas extraction hole sealing device provided by the utility model is provided;

[0021] Figure 3 The second sectional structure schematic diagram of the coal mine gas extraction hole sealing device provided by the utility model is provided;

[0022] Figure 4 The local sectional structure schematic diagram of the coal mine gas extraction hole sealing device provided by the utility model is provided.

[0023] In the drawing: 1, extraction pipe;2, annular stopper;3, plug;4, internal thread sleeve;5, drive motor;6, screw;7, gas outlet pipe;8, annular air cavity;9, air channel;10, air bag;11, air inlet pipe;12, valve;13, installation groove;14, hydraulic cylinder;15, positioning plate;16, limiting pipe;17, limiting rod;18, circular plate. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to the drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and not by way of limitation of the present application. In fact, those skilled in the art will appreciate that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, features shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Based on the embodiments in the utility model embodiment, all other embodiments obtained by those skilled in the art should belong to the scope of protection of the utility model embodiment.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 And Figure 4 , a coal mine gas extraction hole sealing device, comprising extraction pipe 1, extraction pipe 1 is provided with sealing mechanism, sealing mechanism and two fixed mechanism;

[0026] The hole sealing mechanism comprises an annular stopper 2, a plug 3, an internally threaded sleeve 4, a driving motor 5, a screw rod 6 and an air outlet pipe 7, the annular stopper 2 is fixedly installed in the extraction pipe 1, the plug 3 is arranged in the extraction pipe 1, the annular stopper 2 and the plug 3 are matched, the internally threaded sleeve 4 is fixedly installed at the top of the plug 3, the driving motor 5 is fixedly installed at the top of the extraction pipe 1, the screw rod 6 is threadedly installed in the internally threaded sleeve 4, and the top end of the screw rod 6 is fixedly connected with the output shaft of the driving motor 5.

[0027] As shown in Figure 2 , the sealing mechanism comprises two annular air cavities 8, an air channel 9, two air bags 10, an air inlet pipe 11 and a valve 12, the two annular air cavities 8 and the air channel 9 are both arranged on the extraction pipe 1, the annular air cavities 8 and the air channel 9 are communicated, the two air bags 10 are both fixedly sleeved on the extraction pipe 1, the air inlet pipe 11 is fixedly installed at the top of the extraction pipe 1, and the valve 12 is installed on the air inlet pipe 11.

[0028] By arranging the sealing mechanism, the air bags 10 can be inflated to collide with the inner wall of the extraction hole and seal the extraction hole.

[0029] As shown in Figure 3 , the fixing mechanism comprises a mounting groove 13, a hydraulic cylinder 14 and a positioning plate 15, the mounting groove 13 is arranged on the outer wall of the extraction pipe 1, the hydraulic cylinder 14 is fixedly installed in the mounting groove 13, and the positioning plate 15 is fixedly installed on the output shaft of the hydraulic cylinder 14.

[0030] By arranging the fixing mechanism, the positioning plate 15 can be abutted against the inner wall of the extraction hole, the hole sealing device can be fixed in the extraction hole, and the hole sealing device can be prevented from being displaced in the extraction hole due to the impact of gas.

[0031] As shown in Figure 4 , two limiting pipes 16 are fixedly installed on the inner wall of the top of the extraction pipe 1, two limiting rods 17 are fixedly installed at the top of the plug 3, the top ends of the two limiting rods 17 extend into the limiting pipes 16, and circular plates 18 are fixedly installed at the top ends of the two limiting rods 17.

[0032] By arranging the limiting pipes 16, the limiting rods 17 and the circular plates 18, the plug 3 can be limited and guided, so that the plug 3 can stably ascend and descend, and the internally threaded sleeve 4 and the plug 3 can be prevented from rotating with the screw rod 6.

[0033] As shown in Figure 2 and Figure 3 , a plurality of circular holes are arranged on the extraction pipe 1, the circular holes enable the annular air cavities 8 and the air bags 10 to be communicated, and the outer side surfaces of the two air bags 10 are both arranged in a corrugated shape.

[0034] By making the outer side of the air bag 10 corrugated, the air bag 10 can be in contact with the inner wall of the extraction hole after inflation, and the sealing effect can be effectively improved.

[0035] As shown in Figure 3 The outer wall of each positioning plate 15 is provided with anti-skid lines.

[0036] The arc structure and anti-skid lines can increase the friction between the positioning plate 15 and the inner wall of the extraction hole, and improve the fixing effect of the hole sealing device.

[0037] The working principle of the coal mine gas extraction hole sealing device is as follows:

[0038] The first step is to insert the extraction pipe 1 into the extraction hole, and then start the hydraulic cylinder 14 to make the two positioning plates 15 away from each other and abut against the inner wall of the extraction hole, so as to fix the hole sealing device in the extraction hole.

[0039] The second step is to inject air through the air inlet pipe 11, and the air enters the air bag 10 through the air channel 9 and the annular air cavity 8, so that the air bag 10 inflates and expands, and the expanded air bag 10 is in contact with the hole wall of the extraction hole.

[0040] The third step is to start the driving motor 5 when gas needs to be extracted, and the driving motor 5 drives the screw rod 6 to rotate, the screw rod 6 drives the inner threaded sleeve 4 to move upwards, the inner threaded sleeve 4 drives the plug 3 to move upwards, so that the plug 3 is separated from the annular stop block 2, and the gas can pass through the central hole of the annular stop block 2 and move upwards, and the gas is extracted through the air outlet pipe 7.

[0041] It should be noted that the equipment structure and the drawings mainly describe the principle of the utility model, and the power mechanism, power supply system and control system of the device are not completely described, but the specific power mechanism, power supply system and control system can be clearly known by the skilled person in the art under the premise of understanding the principle of the above-mentioned utility model, and the control mode of the application file is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the skilled person in the art.

[0042] The standard parts used can be purchased from the market, and can be customized according to the description and drawings, the specific connection mode of each part adopts the conventional bolt, rivet, welding and other conventional means in the prior art, the mechanical parts and equipment adopt the conventional type in the prior art, and the components known by the skilled person in the art are known by the skilled person in the art.

[0043] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made therein and by those skilled in the art without departing from the spirit and scope of the present application, which should be limited only by the appended claims and their equivalents, and all the changes, modifications, substitutions and variations are intended to be included in the scope of the patent protection of the present application.

Claims

1. A coal mine gas extraction sealing device, characterized in that, The extraction tube includes a sealing mechanism, a sealing mechanism, and two fixing mechanisms. The sealing mechanism includes an annular stop, a plug, an internally threaded sleeve, a drive motor, a screw, and an outlet pipe. The annular stop is fixedly installed inside the extraction pipe, the plug is disposed inside the extraction pipe, and the annular stop and the plug are adapted to each other. The internally threaded sleeve is fixedly installed on the top of the plug, the drive motor is fixedly installed on the top of the extraction pipe, the screw is threaded inside the internally threaded sleeve, and the top end of the screw is fixedly connected to the output shaft of the drive motor.

2. The coal mine gas extraction sealing device according to claim 1, characterized in that, The sealing mechanism includes two annular air chambers, an air passage, two air bags, an air inlet pipe, and a valve. The two annular air chambers and the air passage are both located on the extraction pipe and are connected to each other. The two air bags are fixedly sleeved on the extraction pipe. The air inlet pipe is fixedly installed on the top of the extraction pipe, and the valve is installed on the air inlet pipe.

3. The coal mine gas extraction sealing device according to claim 1, characterized in that, The fixing mechanism includes an installation groove, a hydraulic cylinder, and a positioning plate. The installation groove is formed on the outer wall of the extraction pipe, the hydraulic cylinder is fixedly installed in the installation groove, and the positioning plate is fixedly installed on the output shaft of the hydraulic cylinder.

4. The coal mine gas extraction sealing device according to claim 1, characterized in that, Two limiting tubes are fixedly installed on the top inner wall of the extraction tube, and two limiting rods are fixedly installed on the top of the plug. The top ends of the two limiting rods extend into the limiting tubes, and a circular plate is fixedly installed on the top ends of the two limiting rods.

5. The coal mine gas extraction sealing device according to claim 1, characterized in that, The extraction tube has multiple circular holes that connect the annular air chamber and the air bladder. The outer surfaces of the two air bladders are corrugated.

6. The coal mine gas drainage sealing device according to claim 3, characterized in that, Both positioning plates have an arc-shaped structure, and anti-slip textures are provided on the outer walls of both positioning plates.

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