Coal mine gas sampling device

Abstract

According to the coal mine gas sampling device, a positioning seat is arranged in a gas suction cover, a gas suction pipe is arranged on the positioning seat, the gas suction pipe penetrates through the positioning seat and is in threaded connection with the positioning seat, first supporting rods are arranged on the two sides of the positioning seat, and two sliding grooves are symmetrically formed in the inner wall of the gas suction cover; the outer end of the first supporting rod is slidably connected with the sliding groove, the driving block can move along the shell by rotating the driving block, then the disc can drive the first supporting rod to move through the second supporting rod, the positioning base can further drive the air suction pipe to move, the air suction pipe can penetrate through a hole channel formed in advance, and at the moment, the air suction cover can make contact with the wall face or a designated panel; and after the negative pressure fan is started, the gas suction pipe can be used for extracting the gas in the cavity, so that the limitation during use is low.

Description

Technical Field

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

[0002] Gas is a colorless, odorless, and tasteless gas that is insoluble in water. When it reaches a certain concentration, it can cause people to suffocate due to lack of oxygen and cause combustion or explosion. At present, during the coal mining process, it is necessary to extract the gas in the coal seam of the coal mine to prevent accidents after the gas is discharged.

[0003] In the prior art, during the use of some gas extraction sampling devices, due to the horn-shaped suction hood provided at the front end, they are only suitable for extracting samples inside the coal mine roadway. When encountering cavities and empty rooms in the geological layer during the excavation of the driving face, the sampling head structure of the existing device cannot enter the cavity through the holes opened on the excavation surface for extraction operations, resulting in inconvenient use of the existing device. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a coal mine gas sampling device.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: A coal mine gas sampling device includes a housing. An air suction hood and air suction holes are provided at the front end of the housing. A negative pressure fan is provided inside the housing. A transfer pipe is provided at the rear end of the housing. A positioning seat is provided inside the air suction hood. An air suction pipe is provided on the positioning seat. The air suction pipe penetrates through the positioning seat and is threadedly connected to the positioning seat. First support rods are provided on both sides of the positioning seat. Two sliding grooves are symmetrically arranged on the inner wall of the air suction hood. The outer ends of the first support rods are slidably connected to the sliding grooves. A second support rod penetrating through the air suction hood is provided on the first support rod. A disk is fixedly provided at one end of the second support rod. A driving block is rotatably provided on the disk. The driving block is penetrated by the housing and the disk is threadedly connected to the housing.

[0008] Further, an improvement of the utility model is that the sliding groove is rectangular.

[0009] Further, an improvement of the utility model is that a sealing ring is provided on the periphery of the air suction hood.

[0010] Further, an improvement of the utility model is that anti-slip lines are provided on the outer wall of the driving block.

[0011] Further, an improvement of the utility model is that a plurality of limit seats are provided on the air suction hood, and the second support rod penetrates through the limit seats.

[0012] Furthermore, in the improvement of the present utility model, a positioning seat is provided at one end of the housing. A cavity is provided inside the positioning seat, and the cavity is respectively docked with the adapter pipe and the air outlet end of the negative pressure fan.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides a coal mine gas sampling device, which has the following

[0015] beneficial effects:

[0016] For this coal mine gas sampling device, by rotating the driving block, the driving block can move along the housing. Further, the disc can drive the first rod to move through the second rod, and further the positioning seat can drive the suction pipe to move, enabling the suction pipe to penetrate through the pre-opened hole. At this time, the suction hood will contact the wall or the designated panel. When the negative pressure fan is started, the suction pipe can extract the gas in the cavity of the air chamber, and the limitation in use is low. Description of the drawings

[0017] Figure 1 is the first perspective three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is the second perspective three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 3 is the front view of the present utility model Figure 2 ;

[0020] In the figure: 1, suction hood; 2, housing; 3, adapter pipe; 4, sealing ring; 5, suction hole; 6, positioning seat; 7, first rod; 8, sliding groove; 9, suction pipe; 10, second rod; 11, limit seat; 12, disc; 13, driving block. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-3, A coal mine gas sampling device of the present utility model includes a housing 2. At the front end of the housing 2, there is an air suction hood 1 and an air suction hole 5. Inside the housing 2, there is a negative pressure fan. At the rear end of the housing 2, there is a transfer pipe 3. Inside the air suction hood 1, there is a positioning seat 6. On the positioning seat 6, there is an air suction pipe 9. The air suction pipe 9 penetrates through the positioning seat 6 and is threadedly connected to the positioning seat 6. On both sides of the positioning seat 6, there are first support rods 7. On the inner wall of the air suction hood 1, two sliding grooves 8 are symmetrically arranged. The outer ends of the first support rods 7 are slidably connected to the sliding grooves 8. On the first support rods 7, there are second support rods 10 that penetrate through the air suction hood 1. One end of the second support rod 10 is fixedly provided with a disc 12. On the disc 12, a driving block 13 is rotatably arranged. The driving block 13 is penetrated by the housing 2, and the disc 12 is threadedly connected to the housing 2;

[0023] In this embodiment, when the air suction hood 1 is close to the placement surface and the negative pressure fan is started, suction can be generated at the air suction hole 5, so that the gas in the specified position can be sucked into the transfer pipe 3 and then discharged into the specified container through the transfer pipe 3;

[0024] Here, there is no mandatory regulation on the number of the air suction pipes 9. The rear diameters of multiple air suction pipes 9 are the same, and their front diameters are different. When cavities or empty chambers in the geological layer are encountered during excavation in the driving face, by rotating the driving block 13, the driving block 13 can move along the housing 2, so that the disc 12 can drive the first support rod 7 to move through the second support rod 10. Further, the positioning seat 6 can drive the air suction pipe 9 to move, enabling the air suction pipe 9 to penetrate through the pre-opened hole. At this time, the air suction hood 1 will contact the wall or the specified panel. When the negative pressure fan is started, the air suction pipe 9 can extract the gas in the cavity or empty chamber, and the limitation in use is low.

[0025] In this embodiment, the sliding groove 8 is rectangular.

[0026] In this embodiment, a sealing ring 4 is provided on the periphery of the air suction hood 1. By providing the sealing ring 4, when the air suction hood 1 is close to the placement surface, the sealing performance at the air suction hood 1 can be improved.

[0027] Furthermore, anti-slip lines are provided on the outer wall of the driving block 13, which facilitates the operation of the driving block 13.

[0028] Furthermore, a plurality of limit seats 11 are provided on the air suction hood 1, and the second support rod 10 penetrates through the limit seats 11.

[0029] Furthermore, a positioning seat 6 is provided at one end of the housing 2. Inside the positioning seat 6, there is a cavity, and the cavity is respectively docked with the transfer pipe 3 and the air outlet end of the negative pressure fan. By providing the positioning seat 6, the housing 2 can be easily taken.

[0030] In the description herein, it should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A coal mine gas sampling device, comprising a housing (2), a front end of the housing (2) being provided with an air suction hood (1) and an air suction hole (5), a negative pressure fan being provided inside the housing (2), and a transfer tube (3) being provided at the rear end of the housing (2), characterized in that: A positioning seat (6) is provided inside the air suction hood (1), and an air suction pipe (9) is provided on the positioning seat (6). The air suction pipe (9) passes through the positioning seat (6), and the air suction pipe (9) is threadedly connected to the positioning seat (6). First support rods (7) are provided on both sides of the positioning seat (6). Two sliding grooves (8) are symmetrically provided on the inner wall of the air suction hood (1), and the outer ends of the first support rods (7) are slidably connected to the sliding grooves (8). A second support rod (10) passing through the air suction hood (1) is provided on the first support rod (7), and a disc (12) is fixedly provided at one end of the second support rod (10). A driving block (13) is rotatably provided on the disc (12), and the driving block (13) is passed through the shell (2), and the disc (12) is threadedly connected to the shell (2).

2. A coal mine gas sampling device according to claim 1, characterized in that: The slide groove (8) is rectangular.

3. A coal mine gas sampling device according to claim 2, characterized in that: A sealing ring (4) is provided on the circumferential side of the suction hood (1).

4. A coal mine gas sampling device according to claim 3, characterized in that: The outer wall of the driving block (13) is provided with anti-slip grooves.

5. A coal mine gas sampling device according to claim 4, characterized in that: The suction hood (1) is provided with a plurality of limiting seats (11), and the second support rod (10) passes through the limiting seats (11).

6. A coal mine gas sampling device according to claim 5, characterized in that: A positioning seat (6) is provided at one end of the housing (2), and a cavity is provided inside the positioning seat (6), and the cavity is respectively connected to the transfer tube (3) and the air outlet end of the negative pressure fan.

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