Gas extraction device for coal mining

Abstract

The utility model relates to the technical field of gas extraction, in particular to a gas extraction device for coal mining, which comprises a central pipe, an opening cavity is arranged in the central pipe, a sealing plate is arranged at the opening end of the cavity, extraction pipes are arranged on two sides of the central pipe, and round cavities communicated with the cavity are arranged in the extraction pipes. A circular cavity is formed in the cavity, a fixing sleeve with openings in the two ends is arranged in the circular cavity, a detachable cylinder for containing quick lime is arranged in the fixing sleeve, an installation assembly used for installing the cylinder is arranged in the fixing sleeve, a water drainage opening is formed in the bottom of the cavity, and a water drainage pipe communicated with the cavity is arranged at the water drainage opening. According to the technical scheme, H2S gas can be subjected to primary reaction when entering the extraction pipe on one side, and residual H2S can react with quick lime again when being discharged from the cavity and the extraction pipe on the other side, so that more H2S gas in a coal seam can react with the quick lime, and residues of the H2S gas in the extraction pipes and the central pipe are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas extraction, in particular to a coal seam mining gas extraction device. Background Art

[0002] Coal mine gas is a mixture of methane, carbon dioxide and nitrogen that escapes from coal and surrounding rocks. Gas is a harmful factor in coal mine production. During the mining process, it is generally necessary to extract the gas in the coal seam first to prevent gas accidents.

[0003] For example, the patent with the announcement number CN216687581U discloses a gas extraction pipeline deacidification device, including a hollow cylindrical tank body, two opposite sides of the tank body are respectively provided with extraction branch pipeline connection ports, the bottom of the tank body is provided with a flange A, the flange A is connected to a butterfly valve, the top of the tank body is connected to a blind plate through a flange B, and a net bag is coaxially connected to the tank body, and the net bag is filled with quicklime. Although the gas extraction pipeline deacidification device filters H2S gas and hydrosulfuric acid dissolved in the effluent water to achieve the purpose of deacidification and reduce pipeline corrosion; however, in actual use of the gas extraction pipeline deacidification device, if the generated H2S gas fails to react completely with the quicklime in the tank body, some H2S gas will still enter the extraction branch pipeline, causing corrosion of the extraction branch pipeline, so it needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a coal seam mining gas extraction device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A coal seam mining gas extraction device comprises a central tube, wherein a cavity with an open end is provided in the central tube, a sealing plate is provided at the open end of the cavity, extraction tubes are provided on both sides of the central tube, a circular cavity connected to the cavity is provided in the extraction tube, a fixing sleeve with open ends is provided in the circular cavity, a detachable cylinder for placing quicklime is provided in the fixing sleeve, a mounting assembly for mounting the cylinder is provided in the fixing sleeve, a drain outlet is provided at the bottom of the cavity, and a drain pipe connected to the cavity is provided at the drain outlet.

[0007] Furthermore, the inner wall of the fixed sleeve is symmetrically provided with sliding grooves, the inner wall of the fixed sleeve is provided with a rotating groove connected to the sliding groove, the inner wall of the fixed sleeve is provided with a clamping groove connected to the rotating groove, the mounting assembly includes a slider arranged on the side wall of the cylinder and can be clamped into the clamping groove, the end of the fixed sleeve close to the cavity opening is provided with a ring body, and the ring body is evenly provided with first springs for pushing the slider to clamp with the clamping groove.

[0008] Furthermore, a placement cavity with an open end is provided in the cylinder, a threaded mounting plate is provided at the open end of the placement cavity, holes for gas circulation are provided on the mounting plate and on the bottom wall of the placement cavity, a short handle for screwing the mounting plate is provided on the mounting plate, and a long handle for driving the slider to snap into the slot is provided on the cylinder.

[0009] Furthermore, a cylinder located above the drain outlet and used to place quicklime is provided in the cavity, a plurality of drainage holes connected to the drain pipe are evenly distributed on the bottom wall of the cylinder, a plurality of air holes for gas circulation are provided on the side wall of the cylinder, and an openable and closable cover is provided above the cylinder.

[0010] Furthermore, a limiting column for positioning the cylinder is relatively arranged on the bottom wall of the cavity, a limiting cavity is arranged on the limiting column, and a limiting block which can extend into the corresponding limiting cavity is arranged on the outer wall of the cylinder.

[0011] Furthermore, a column is provided at the center of the cover plate, a rotating sleeve corresponding to the column is provided below the sealing plate, and a second spring for pushing the limiting block to abut against the corresponding limiting cavity is provided in the rotating sleeve.

[0012] Furthermore, a flange is provided at the end of the extraction pipe away from the central pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The coal seam mining gas extraction device, through the arrangement of a fixed sleeve, a cylinder and a mounting assembly, allows the cylinder to be detachably installed in the fixed sleeve through the mounting assembly, and by arranging cylinders in the extraction pipes on both sides, the H2S gas can undergo a preliminary reaction when entering the extraction pipe on one side, and if there is any residual H2S, it can react with quicklime again in the cavity and when discharged from the extraction pipe on the other side, so that the H2S gas in the coal seam can react more with the quicklime, thereby reducing the residual H2S gas in the extraction pipe and the central pipe.

[0015] 2. The coal seam mining gas extraction device, through the setting of the sliding groove, the rotating groove, the clamping groove, the slider, the ring body and the first spring, when the cylinder is installed, the slider on the cylinder slides in the sliding groove, when the slider slides into the rotating groove, the rotating cylinder drives the slider to rotate in the rotating groove, when the slider rotates to the innermost end in the rotating groove, the first spring installed on the ring body pushes the cylinder to drive the slider to clamp in the corresponding clamping groove, and the installation of the cylinder is completed, and the installation of the cylinder is preferably completed.

[0016] 3. The coal seam mining gas extraction device, through the arrangement of the column, the rotating sleeve and the second spring, when the sealing plate is installed in threaded connection with the open end of the cavity, the sealing plate will move downward to compress the second spring to squeeze the column, and then drive the column to squeeze the cover plate, so as to better realize the installation of the cylinder in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a coal seam mining gas extraction device in the utility model.

[0018] Figure 2 It is a cross-sectional schematic diagram of a coal seam mining gas extraction device in the utility model.

[0019] Figure 3 It is a structural schematic diagram of a coal seam mining gas extraction device in the utility model without a sealing plate installed.

[0020] Figure 4 It is a schematic diagram of the exploded structure of the fixing sleeve, the mounting assembly and the cylinder in the utility model.

[0021] The meanings of the numbers in the figure are as follows: 1. center tube; 2. cavity; 3. sealing plate; 4. extraction tube; 5. circular cavity; 6. fixed sleeve; 7. cylinder; 8. drainage pipe; 100. sliding groove; 101. rotating groove; 102. slot; 103. slider; 104. ring body; 105. first spring; 106. placement cavity; 107. mounting plate; 108. hole; 109. short handle; 110. long handle; 200. cylinder; 201. drainage hole; 202. air hole; 203. cover plate; 204. limit column; 205. limit block; 206. column; 207. rotating sleeve; 208. second spring; 9. flange. DETAILED DESCRIPTION

[0022] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0023] The following is combined with Figure 1-Figure 4 This embodiment is described in further detail.

[0024] See also Figure 1-Figure 4A coal seam mining gas extraction device in this embodiment includes a central tube 1, a cavity 2 with an open end is provided in the central tube 1, a sealing plate 3 is provided at the open end of the cavity 2, extraction tubes 4 are provided on both sides of the central tube 1, a circular cavity 5 connected to the cavity 2 is provided in the extraction tube 4, a fixing sleeve 6 with openings at both ends is provided in the circular cavity 5, a detachable cylinder 7 for placing quicklime is provided in the fixing sleeve 6, a mounting assembly for mounting the cylinder 7 is provided in the fixing sleeve 6, a drainage port is provided at the bottom of the cavity 2, a drainage pipe 8 connected to the cavity 2 is provided at the drainage port; a cylinder 200 located above the drainage port and used for placing quicklime is provided in the cavity 2, a plurality of drainage holes 201 connected to the drainage pipe 8 are evenly distributed on the bottom wall of the cylinder 200, a plurality of air holes 202 for gas circulation are provided on the side wall of the cylinder 200, and an openable cover plate 203 is provided above the cylinder 200.

[0025] In this embodiment, the extraction pipe 4 is welded to both sides of the central pipe 1 through the arrangement of the central pipe 1, the cavity 2, the extraction pipe 4 and the circular cavity 5. When gas extraction is performed, the H2S gas and gas in the coal seam enter the circular cavity 5 from the extraction pipe 4 on one side, and then pass through the cavity 2 of the central pipe 1 and are discharged from the extraction pipe 4 on the other side.

[0026] In this embodiment, the sealing plate 3 is provided so that the sealing plate 3 is threadedly connected to the inner wall of the cavity 2 to facilitate installation and removal of the sealing plate 3, thereby facilitating the placement and removal of the cylinder 200 in the cavity 2.

[0027] In this embodiment, by arranging the fixing sleeve 6, the cylinder 7 and the installation assembly, the fixing sleeve 6 is fixedly connected to the opening of the circular cavity 5 away from the central tube 1, and the cylinder 7 can be detachably installed in the fixing sleeve 6 through the installation assembly. Quicklime can be placed in the cylinder 7 to react with the H2S gas. By arranging the cylinder 7 in the extraction pipes 4 on both sides, the H2S gas can undergo a preliminary reaction when entering the extraction pipe 4 on one side. If there is any residual H2S, it can react with the quicklime multiple times in the cavity and when the extraction pipe 4 on the other side is discharged, so that the H2S gas in the coal seam can react with the quicklime more, thereby reducing the residual H2S gas in the extraction pipe 4 and the central tube 1.

[0028] In this embodiment, the cover plate 203 and the cylinder 200 are hingedly connected by the arrangement of the cylinder 200, the air hole 202 and the cover plate 203, so that the cover plate 203 can be opened to replenish the quicklime in the cylinder 200. After the H2S gas enters the extraction pipe 4 on one side for a preliminary reaction, the residual H2S gas can enter the cylinder 200 through the air hole 202, react with the quicklime in the cylinder 200, and further remove the residual H2S gas.

[0029] The cylinder 200 can be taken out by removing the sealing plate 3, and the quicklime in the cylinder 200 can be replaced and supplemented. The cylinder 7 can be removed by installing the assembly, and the quicklime in the cylinder 7 can be replaced and supplemented.

[0030] In this embodiment, by setting the drain port, drain pipe 8 and drain hole 201, the water generated after the reaction of H2S gas and quicklime can flow from the drain port into the drain pipe 8 through the drain hole 201 on the bottom wall of the cylinder 200 and be discharged; in actual use, a butterfly valve is provided on the drain pipe 8 to open and close the drain pipe 8.

[0031] It should be noted that the extraction pipe 4 is arranged at an inclination relative to the central pipe 1, so that the water produced by the reaction of H2S gas and quicklime can flow into the central pipe 1, so that it can be collected and discharged.

[0032] See also Figure 1-Figure 4 In this embodiment, the inner wall of the fixed sleeve 6 is symmetrically provided with sliding grooves 100, the inner wall of the fixed sleeve 6 is provided with a rotating groove 101 connected to the sliding groove 100, the inner wall of the fixed sleeve 6 is provided with a clamping groove 102 connected to the rotating groove 101, and the mounting assembly includes a slider 103 arranged on the side wall of the cylinder 7 and capable of being clamped into the clamping groove 102, and a ring body 104 is provided at one end of the fixed sleeve 6 close to the opening of the cavity 2, and the first springs 105 for pushing the slider 103 to clamp with the clamping groove 102 are evenly distributed on the ring body 104.

[0033] In this embodiment, Figure 4 As shown, the sliding groove 100 is arranged axially along the fixed sleeve 6, the rotating groove 101 is arranged circumferentially along the fixed sleeve 6 and one end is connected to one end of the sliding groove 100, and the other end of the rotating groove 101 is provided with a clamping groove 102. Through the arrangement of the sliding groove 100, the rotating groove 101, the clamping groove 102, the slider 103, the ring body 104 and the first spring 105, the slider 103 is relatively fixedly connected to the side wall of the cylinder 7. When the cylinder 7 is installed, the slider 103 on the cylinder 7 slides in the corresponding sliding groove 100. When the slider 103 slides into the rotating groove 101, the rotating cylinder 7 drives the slider 103 to rotate in the rotating groove 101. When the slider 103 rotates to the innermost end in the rotating groove 101, the first spring 105 installed on the ring body 104 pushes the cylinder 7 to drive the slider 103 to be clamped in the corresponding clamping groove 102, so that the installation of the cylinder 7 in the fixed sleeve 6 is completed.

[0034] In this embodiment, a connecting hole communicating with the circular cavity 5 is opened at the center of the ring body 104 to facilitate the flow of gas.

[0035] See also Figure 1-Figure 4In this embodiment, a placement cavity 106 with an open end is provided in the cylinder 7, and a mounting plate 107 is provided at the open end of the placement cavity 106. Holes 108 for gas circulation are provided on the mounting plate 107 and on the bottom wall of the placement cavity 106. A short handle 109 for screwing the mounting plate 107 is provided on the mounting plate 107, and a long handle 110 for driving the slider 103 to snap into the slot 102 is provided on the cylinder 7.

[0036] In this embodiment, by setting the placement cavity 106 and the mounting plate 107, the mounting plate 107 is connected to the opening of the placement cavity 106 by threads, thereby realizing the opening and closing of the placement cavity 106, so as to place quicklime in the cylinder 7 or replace quicklime.

[0037] In this embodiment, the holes 108 are provided so that the gas can flow through the holes 108 and react in the cylinder 7 .

[0038] In this embodiment, by setting the short handle 109 and the long handle 110, the short handle 109 is fixedly connected to the center of the mounting plate 107, and the long handle 110 is fixedly connected to the center of the bottom wall of the cylinder 7. The short handle 109 can assist the operator to rotate the mounting plate 107 to open and close the mounting plate 107. When it is necessary to take out the cylinder 7 to replace the quicklime, the long handle 110 can be pushed first to drive the cylinder 7 to compress the first spring 105, so that the slider 103 is disengaged from the slot 102 to the rotating slot 101, and then the long handle 110 is rotated to drive the cylinder 7 to rotate so that the slider 103 rotates to the sliding slot 100, and then the long handle 110 is pulled to take out the cylinder 7 to replace the quicklime.

[0039] See also Figure 1-Figure 4 In this embodiment, a limiting column 204 for positioning the cylinder 200 is relatively provided on the bottom wall of the cavity 2, a limiting cavity is provided on the limiting column 204, and a limiting block 205 that can extend into the corresponding limiting cavity is provided on the outer wall of the cylinder 200; a column 206 is provided at the center of the cover plate 203, and a rotating sleeve 207 corresponding to the column 206 is provided below the sealing plate 3, and a second spring 208 for pushing the limiting block 205 to abut against the corresponding limiting cavity is provided in the rotating sleeve 207.

[0040] In this embodiment, by setting the limit column 204, the limit cavity and the limit block 205, the limit column 204 is relatively fixedly connected to the bottom wall of the cavity 2, and the limit block 205 is fixedly connected to the outer wall of the cylinder 200. When the cylinder 200 is installed, the limit block 205 is inserted into the corresponding limit cavity, thereby realizing the installation of the cylinder 200 above the drain outlet.

[0041] In this embodiment, by setting the column 206, the rotating sleeve 207 and the second spring 208, the column 206 is fixedly connected to the cover plate 203, the rotating sleeve 207 is fixedly connected to the lower center of the sealing plate 3, the second spring 208 is placed in the rotating sleeve 207, and the rotating sleeve 207 and the column 206 are rotatably connected. When the sealing plate 3 is installed in threaded connection with the open end of the cavity 2, the sealing plate 3 will move downward to compress the second spring 208 to squeeze the column 206, and then drive the column 206 to squeeze the cover plate 203, so that the limit block 205 on the outer wall of the cylinder 200 is stuck in the corresponding limit cavity, thereby better realizing the installation of the cylinder 200 in the cavity 2.

[0042] See also Figure 1-Figure 4 In this embodiment, a flange 9 is provided at the end of the extraction pipe 4 away from the central pipe 1 .

[0043] In this embodiment, by providing the flange 9 , the cylinder 7 is installed at the extraction pipe 4 close to the flange 9 , so that the cylinder 7 can be taken out easily.

[0044] In this embodiment, quicklime can be first put into a net bag and then put into the cylinder 7 and the cylinder body 200.

[0045] Working principle: When the coal seam mining gas extraction device is in use, the H2S gas and gas in the coal seam enter the circular cavity 5 from the extraction pipe 4 on one side, and then pass through the cavity 2 of the central pipe 1, and are discharged from the extraction pipe 4 on the other side, so that the H2S gas can undergo a preliminary reaction when entering the extraction pipe 4 on one side, then enter the central pipe 1 to react, and can undergo another reaction when discharged from the extraction pipe 4 on the other side, thereby removing more residual H2S gas and reducing corrosion to the extraction pipe 4.

[0046] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A coal seam mining gas extraction device, comprising a central pipe (1), characterized in that: A cavity (2) with an open end is provided in the central tube (1), a sealing plate (3) is provided at the open end of the cavity (2), extraction tubes (4) are provided on both sides of the central tube (1), a circular cavity (5) connected to the cavity (2) is provided in the extraction tube (4), a fixing sleeve (6) with two ends open is provided in the circular cavity (5), a detachable cylinder (7) for placing quicklime is provided in the fixing sleeve (6), a mounting assembly for mounting the cylinder (7) is provided in the fixing sleeve (6), a drainage outlet is provided at the bottom of the cavity (2), and a drainage pipe (8) connected to the cavity (2) is provided at the drainage outlet.

2. A coal seam mining gas extraction device according to claim 1, characterized in that: The inner wall of the fixed sleeve (6) is symmetrically provided with sliding grooves (100), the inner wall of the fixed sleeve (6) is provided with a rotating groove (101) connected to the sliding groove (100), the inner wall of the fixed sleeve (6) is provided with a clamping groove (102) connected to the rotating groove (101), the mounting assembly comprises a sliding block (103) which is arranged on the side wall of the cylinder (7) and can be clamped into the clamping groove (102), and the end of the fixed sleeve (6) close to the opening of the cavity (2) is provided with a ring body (104), and the ring body (104) is evenly provided with first springs (105) for pushing the sliding block (103) to clamp with the clamping groove (102).

3. A coal seam mining gas extraction device according to claim 1, characterized in that: The cylinder (7) is provided with a placement cavity (106) with an open end, the open end of the placement cavity (106) is provided with a threaded mounting plate (107), the mounting plate (107) and the bottom wall of the placement cavity (106) are both provided with holes (108) for gas circulation, the mounting plate (107) is provided with a short handle (109) for screwing the mounting plate (107), and the cylinder (7) is provided with a long handle (110) for driving the slider (103) to snap into the slot (102).

4. A coal seam mining gas extraction device according to claim 1, characterized in that: The cavity (2) is provided with a cylinder (200) located above the drain outlet and used for placing quicklime, the bottom wall of the cylinder (200) is evenly provided with a plurality of drain holes (201) connected to the drain pipe (8), the side wall of the cylinder (200) is provided with a plurality of air holes (202) for gas circulation, and an openable cover plate (203) is provided above the cylinder (200).

5. A coal seam mining gas extraction device according to claim 4, characterized in that: A limiting column (204) for positioning the cylinder (200) is disposed on the bottom wall of the cavity (2), a limiting cavity is disposed on the limiting column (204), and a limiting block (205) that can extend into the corresponding limiting cavity is disposed on the outer wall of the cylinder (200).

6. A coal seam mining gas extraction device according to claim 4, characterized in that: A column (206) is provided at the center of the cover plate (203), a rotating sleeve (207) corresponding to the column (206) is provided below the sealing plate (3), and a second spring (208) for pushing the limiting block (205) to abut against the corresponding limiting cavity is provided inside the rotating sleeve (207).

7. A coal seam mining gas extraction device according to claim 1, characterized in that: The end of the extraction pipe (4) away from the central pipe (1) is provided with a flange (9).

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