Coal mine gas drilling extraction anti-blocking device

Abstract

The utility model belongs to the field of coal mine gas extraction, and particularly relates to an anti-blocking device for coal mine gas drilling extraction, which can improve the purity of coal mine gas entering a collecting device and prevent dust from blocking a second air extraction hole through the arrangement of two layers of filter screens and two layers of adsorption structures. According to the gas extraction device, normal gas extraction treatment is not affected, the coal mine gas can be fully adsorbed and filtered, dust in the gas is prevented from directly entering the gas extraction hole, the gas extraction hole is effectively prevented from being blocked, and the whole device can be conveniently disassembled and cleaned; dust is prevented from blocking the inner wall of the structure to affect the extraction efficiency of coal mine gas, and the structure can be attached to the inner wall of a drainage pipe for sealing treatment when the gas drainage pipe is connected, so that the applicability of the device is improved, the sealing performance of the device can be improved, meanwhile, the coal mine gas can be effectively shunted, and the service life of the device is prolonged. And the situation that the device bursts due to the fact that the gas impact force is too large is avoided.

Description

Technical Field

[0001] The utility model relates to the field of coal mine gas extraction, in particular to a coal mine gas drilling extraction anti-blocking device. Background Art

[0002] During coal mining, there is often a large amount of gas gushing out, threatening the safety of personnel underground in coal mines. Gas refers to harmful gases in the mine, mainly methane, and sometimes refers to methane alone. During coal mining, coal mine gas extraction equipment is needed to extract gas from coal seams in coal mines to prevent accidents after gas discharge.

[0003] In Chinese patent CN202210852387.8, the invention discloses a rapid extraction sampling device based on coal mine gas extraction, comprising: an outer tube, the two ends of the outer tube are open, the bottom of the outer tube is detachably connected to a sealing plate through a sealing mechanism, the top of the outer tube is fixedly connected to a positioning plate, the center point of the positioning plate is provided with a first through hole, a transmission mechanism is provided in the first through hole, and a sealing mechanism is provided on the inner wall of the outer tube; an inner tube, the bottom end of the inner tube extends into the inner cavity of the outer tube through the first through hole and is fixedly connected to the sealing plate, and the bottom of the inner tube The outer wall of the inner tube is fixedly connected to the sealing mechanism, the outer wall of the top of the inner tube is transmission-connected to the transmission mechanism, the outer wall of the inner tube is detachably connected to the sealing mechanism, the outer wall of the inner tube is provided with a dust removal mechanism, the dust removal mechanism is slidingly connected to the inner wall of the outer tube, a plurality of exhaust holes are opened on the bottom side wall of the inner tube, the outer wall of the inner tube is covered with and fixedly connected with a dustproof net, the dustproof net covers a plurality of exhaust holes, the dust removal mechanism is detachably connected to a plurality of dustproof nets. The invention can reduce the amount of impurities contained in the extracted gas and improve the extraction purity of the gas.

[0004] In order to solve the problem that the dust mixed in the gas in the existing device adheres to the dust-proof net after long-term use, which easily causes the dust-proof net to be blocked, thus affecting the gas extraction effect, the existing technology uses a dust removal structure to remove dust from the dust-proof net to avoid clogging of the dust-proof net, thereby improving the gas extraction efficiency. Although the existing technology proposes to set a dust-proof structure at the gas extraction port, since gas extraction is a relatively large project, a lot of coal ash will definitely be generated during extraction. Only by setting a dust-proof structure at the gas extraction port to clean the dust, it is very easy to cause the dust to be brushed into the gas extraction port and then directly enter the extraction device, affecting the efficiency of subsequent extraction work.

[0005] Therefore, in order to solve the above problems, a coal mine gas drilling and extraction anti-blocking device is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a coal mine gas drilling extraction anti-blocking device to solve the problem proposed in the above-mentioned background technology that dust is only cleaned by setting a dust-proof structure at the exhaust port, which easily causes dust to be brushed into the exhaust port and then directly enters the extraction device, affecting the efficiency of subsequent extraction work.

[0007] The technical solution adopted by the utility model to solve the technical problem is as follows: the utility model discloses a coal mine gas drilling extraction anti-blocking device, comprising an outer tube of the device, an end tube is arranged on the lower outer side of the outer tube of the device, and a fixed end head is fixed on the bottom of the end tube, and an inner tube of the device is fixed on the upper side of the outer tube of the device;

[0008] The end tube includes a bottom plate, a first filter screen, a ferrule, a rotating shaft, a connecting rod, a positioning plate, a positioning frame, a top plate, a second filter screen, a clamping rod and a clamping block. The bottom plate is clamped on the inner side of the end tube, and the first filter screen is fixed inside the bottom plate. Clamps are arranged at equal intervals on the top side of the bottom plate, and a rotating shaft is arranged at the middle position of the top of the bottom plate. A connecting rod is fixed at the middle position of the rotating shaft, and a rotating shaft is also arranged on the top of the connecting rod. Positioning plates are fixed on the outer wall of the connecting rod at equal intervals, and a positioning frame is fitted on the inner side of the positioning plate. The top plate is fitted on the top of the rotating shaft, and the second filter screen is fixed inside the top plate. Clamping rods are fixed on the bottom side of the top plate at equal intervals, and clamping blocks penetrate the inside of the clamping rods.

[0009] Preferably, the outer tube of the device comprises a threaded joint and a threaded protrusion, the bottom of the outer tube of the device is fixed with the threaded joint, and the outer wall of the threaded joint is fixed with the threaded protrusion.

[0010] Preferably, the end pipe further includes a thread groove, the inner wall of the end pipe is reserved with the thread groove, and the thread groove and the thread protrusion are threadedly connected.

[0011] Preferably, the positioning frame includes adsorption cotton, adsorption cotton is arranged inside the positioning frame, and the positioning frame is arranged in a hollow shape.

[0012] Preferably, the fixed end includes a first air extraction hole, a sealing airbag and an air duct, the first air extraction holes are reserved at equal intervals at the bottom of the fixed end, a sealing airbag is fitted on the outer wall of the fixed end, and the outer wall of the sealing airbag is connected to the air duct.

[0013] Preferably, the inner tube of the device includes second air extraction holes, the outer wall of the inner tube of the device is provided with second air extraction holes at equal intervals, and the bottom of the inner tube of the device is arranged in a solid shape.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model can improve the purity of coal mine gas entering the collection device through the arrangement of two layers of filter screens and two layers of adsorption structures, avoid dust blocking the second air extraction hole, do not affect the normal extraction and treatment of gas, and can fully adsorb and filter the coal mine gas, avoid dust in the gas directly entering the air extraction hole, and effectively prevent the air extraction hole from being blocked;

[0016] 2. The utility model can facilitate the disassembly and cleaning of the entire device to prevent dust from clogging the inner wall of the structure and affecting the extraction efficiency of coal mine gas. When connecting the gas extraction pipe, it can be sealed with the inner wall of the extraction pipe. This not only improves the applicability of the device, but also improves the sealing of the device. At the same time, it can effectively divert the coal mine gas to avoid the situation where the gas impact force is too large and causes the device to explode.

[0017] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 labor.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the cross-section of the end tube of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model as a whole viewed from the front;

[0021] Figure 3 This is a schematic diagram of the structure of the end tube of the utility model from a top view;

[0022] Figure 4 This is a schematic diagram of the internal structure of the end tube of the utility model;

[0023] Figure 5 It is a schematic diagram of the explosion structure of the bottom plate and the top plate of the utility model;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the outer tube of the device of the utility model.

[0025] In the figure: 1. outer tube of the device; 11. threaded joint; 12. threaded protrusion; 2. end tube; 21. threaded groove; 22. bottom plate; 23. first filter screen; 24. ferrule; 25. rotating shaft; 26. connecting rod; 27. positioning plate; 28. positioning frame; 281. adsorption cotton; 29. ​​top plate; 210. second filter screen; 211. clamping rod; 212. clamping block; 3. fixed end; 31. first exhaust hole; 32. sealing air bag; 33. air duct; 4. inner tube of the device; 41. second exhaust hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figures 1 to 6 As shown, a coal mine gas drilling extraction anti-blocking device comprises an outer tube 1 of the device, an end tube 2 is arranged on the lower outer side of the outer tube 1, and a fixed end head 3 is fixed at the bottom of the end tube 2, and an inner tube 4 of the device is fixed on the upper side of the outer tube 1;

[0029] The end tube 2 includes a bottom plate 22, a first filter screen 23, a ferrule 24, a rotating shaft 25, a connecting rod 26, a positioning plate 27, a positioning frame 28, a top plate 29, a second filter screen 210, a clamping rod 211 and a clamping block 212. The inner side of the end tube 2 is clamped with the bottom plate 22, and the first filter screen 23 is fixed inside the bottom plate 22. The top side of the bottom plate 22 is provided with ferrules 24 at equal intervals, and a rotating shaft 25 is provided in the middle of the top of the bottom plate 22. The rotating shaft 2 A connecting rod 26 is fixed at the middle position of the connecting rod 26, and a rotating shaft 25 is also arranged on the top of the connecting rod 26. Positioning plates 27 are fixed to the outer wall of the connecting rod 26 at equal intervals, and a positioning frame 28 is arranged on the inner side of the positioning plate 27. A top plate 29 is arranged on the top of the rotating shaft 25, and a second filter screen 210 is fixed inside the top plate 29. Clamping rods 211 are fixed to the bottom side of the top plate 29 at equal intervals, and the inside of the clamping rods 211 is penetrated by clamping rods. Block 212, through the setting of two layers of filter screens and two layers of adsorption structure, can improve the purity of coal mine gas entering the collection device, avoid dust clogging the second exhaust hole 41, and do not affect the normal extraction and treatment of gas. The end pipe 2 also includes a threaded groove 21. The inner wall of the end pipe 2 is reserved with a threaded groove 21, and the threaded groove 21 is threadedly connected to the threaded protrusion 12. Through such a setting, the end pipe 2 and the outer tube 1 of the device can be easily installed and disassembled, so that the inside of the end pipe 2 can be cleaned at any time, improving the overall disassembly convenience of the device. The positioning frame 28 includes adsorption cotton 281, and the interior of the positioning frame 28 is provided with adsorption cotton 281, and the positioning frame 28 is set in a hollow shape. Through such a setting, the coal mine gas can be fully adsorbed and filtered to avoid dust in the gas directly entering the exhaust hole, effectively preventing the exhaust hole from being blocked.

[0030] Embodiment 2

[0031] like Figures 1 to 3 as well as Figure 6As shown, on the basis of the first embodiment, the utility model provides a technical solution: the outer tube 1 of the device includes a threaded joint 11 and a threaded protrusion 12, the bottom of the outer tube 1 of the device is fixed with a threaded joint 11, and the outer wall of the threaded joint 11 is fixed with a threaded protrusion 12. Through such a setting, the device as a whole can be easily disassembled and cleaned to prevent dust from clogging the inner wall of the structure and affecting the extraction efficiency of coal mine gas. The fixed end 3 includes a first exhaust hole 31, a sealing air bag 32 and an air duct 33. The bottom of the fixed end 3 is evenly spaced with the first exhaust hole 31 reserved, and the fixed end 3 The outer wall of the device is fitted with a sealing air bag 32, and the outer wall of the sealing air bag 32 is connected to the air duct 33. Through such a setting, when the gas extraction pipe is connected, it can be fitted and sealed with the inner wall of the extraction pipe, which not only improves the applicability of the device, but also improves the sealing of the device. The inner tube 4 of the device includes second exhaust holes 41, and the outer wall of the inner tube 4 of the device is reserved with second exhaust holes 41 at equal intervals, and the bottom of the inner tube 4 of the device is set in a solid shape. Through such a setting, the coal mine gas can be effectively diverted to avoid the situation where the gas impact force is too large and causes the device to burst.

[0032] Working principle: First, the outer tube 1, the end tube 2, the fixed end 3 and the inner tube 4 of the device constitute an integral coal mine gas extraction device. When in use, the fixed end 3 is inserted into the coal mine gas extraction pipe. After being inserted to a suitable position, the air duct 33 is injected with gas, so that the sealing air bag 32 swells and fits the inner wall of the coal mine gas extraction pipe. In this way, when extracting gas, the gas will not overflow from the outer wall of the fixed end 3. The extraction machine connected to the end of the inner tube 4 of the device is started, and the gas enters the fixed end 3 through the first extraction hole 31;

[0033] Next, the gas passes through the first filter screen 23 in the middle of the bottom plate 22 inside the end pipe 2. The first filter screen 23 performs preliminary filtering treatment on the dust. When the gas passes through the first filter screen 23 and enters the middle position of the end pipe 2, the connecting rod 26 rotates under the rotation of the rotating shaft 25. At the same time, the positioning frame 28 fixed in the middle position of the positioning plate 27 rotates synchronously. Adsorption cotton 281 is placed inside the positioning frame 28 to fully contact with the gas under the rotation. The adsorption cotton 281 performs filtering and adsorption treatment on the gas entering the end pipe 2. The positioning frame 28 is provided with two layers, which can perform multiple dust removal treatments on the incoming gas. The gas after dust removal passes through the second filter screen 210 of the top plate 29 for secondary filtering treatment. The bottom of the inner tube 4 of the device is solid, so the treated gas is sucked into the inner tube 4 of the device through the second exhaust hole 41 on the outer wall of the inner tube 4 of the device fixed at the top of the outer tube 1 of the device, and enters the coal mine gas collection device through the exhaust fan. In this way, the gas can achieve the purpose of diversion and avoid a large impact force.

[0034] Finally, it should be noted that the end pipe 2 can be disassembled from the outer pipe 1 of the device through the action of the thread groove 21 and the thread protrusion 12 of the threaded joint 11. Figure 5 As shown, the bottom plate 22 and the top plate 29 can be installed and disassembled through the clamping sleeve 24, the clamping rod 211 and the through-installed clamping block 212, so that the adsorption cotton 281 can be replaced and cleaned.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A coal mine gas drilling and extraction anti-blocking device, characterized in that: It comprises an outer tube (1) of the device, an end tube (2) is arranged on the lower outer side of the outer tube (1), a fixed end head (3) is fixed at the bottom of the end tube (2), and an inner tube (4) of the device is fixed above the outer tube (1); The end tube (2) comprises a bottom plate (22), a first filter screen (23), a ferrule (24), a rotating shaft (25), a connecting rod (26), a positioning plate (27), a positioning frame (28), a top plate (29), a second filter screen (210), a clamping rod (211) and a clamping block (212); the bottom plate (22) is clamped on the inner side of the end tube (2), and the first filter screen (23) is fixed inside the bottom plate (22); the ferrules (24) are arranged at equal intervals on the top side of the bottom plate (22), and the rotating shaft (25) is arranged in the middle of the top of the bottom plate (22); A connecting rod (26) is fixed at the middle position of the rotating shaft (25), and the top of the connecting rod (26) is also provided with a rotating shaft (25), positioning plates (27) are fixed at equal intervals on the outer wall of the connecting rod (26), and a positioning frame (28) is provided on the inner side of the positioning plate (27), a top plate (29) is provided on the top of the rotating shaft (25), and a second filter screen (210) is fixed inside the top plate (29), and clamping rods (211) are fixed at equal intervals on the bottom side of the top plate (29), and clamping blocks (212) are passed through the inside of the clamping rods (211).

2. A coal mine gas drilling and extraction anti-blocking device according to claim 1, characterized in that: The device outer tube (1) comprises a threaded joint (11) and a threaded protrusion (12); the threaded joint (11) is fixed to the bottom of the device outer tube (1), and the threaded protrusion (12) is fixed to the outer wall of the threaded joint (11).

3. The anti-blocking device for coal mine gas drilling extraction according to claim 1 is characterized in that: The end pipe (2) further comprises a thread groove (21), the inner wall of the end pipe (2) is reserved with the thread groove (21), and the thread groove (21) and the thread protrusion (12) are threadedly connected.

4. A coal mine gas drilling and extraction anti-blocking device according to claim 1, characterized in that: The positioning frame (28) comprises adsorption cotton (281), the interior of the positioning frame (28) is provided with adsorption cotton (281), and the positioning frame (28) is arranged in a hollow shape.

5. The anti-blocking device for coal mine gas drilling extraction according to claim 1 is characterized by: The fixed end (3) comprises a first air extraction hole (31), a sealing air bag (32) and an air duct (33); the first air extraction holes (31) are reserved at equal intervals at the bottom of the fixed end (3); the sealing air bag (32) is fitted on the outer wall of the fixed end (3); and the outer wall of the sealing air bag (32) is connected to the air duct (33).

6. A coal mine gas drilling and extraction anti-blocking device according to claim 1, characterized in that: The device inner tube (4) comprises second air extraction holes (41), the outer wall of the device inner tube (4) is provided with second air extraction holes (41) at equal intervals, and the bottom of the device inner tube (4) is arranged in a solid shape.

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