Underground gas detection device

Abstract

The invention relates to the technical field of gas detection, in particular to an underground gas detection device which comprises a protection box and a gas detector placed in the protection box, a movable groove is formed in the bottom of the protection box, a gas inlet pipe is installed at a gas inlet in the bottom of the gas detector, a gas pump is installed on the inner wall of the gas inlet pipe, and a fixing plate is fixedly connected to the side portion of the gas inlet pipe. The side portion of the fixing plate is fixedly connected to the inner wall of the protection box, the bottom of the air inlet pipe is connected with a filtering mechanism, the bottom of the filtering mechanism is connected with a corrugated pipe, the bottom of the corrugated pipe penetrates through the movable groove and then is fixedly connected with a limiting ring, and a lifting mechanism is arranged in the protection box and connected with the corrugated pipe. And impurities in the sucked gas are removed through the filtering mechanism, so that the technical defects that in the prior art, due to the fact that a large number of dust particles are contained in underground air, an exhaust hole is blocked, and the gas detection operation precision is affected are overcome, and the technical effects that the purity of an extracted gas sample is higher, and the detection effect is better are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to an underground gas detection device. Background Art

[0002] Coal and gas outbursts are major disasters that seriously threaten coal mine production safety. The main components of gas are alkanes, of which methane accounts for the vast majority. It does not support combustion and cannot sustain breathing. When it reaches a certain concentration, it will cause people to suffocate due to lack of oxygen, and there is a certain probability of combustion or explosion, which directly threatens the lives of tunnel construction workers. Therefore, it is necessary to detect the gas concentration in the gas tunnel to avoid explosion caused by excessive gas concentration.

[0003] Gas content detection in existing gas tunnels is usually done manually. During the inspection, workers need to go into the tunnel to manually test the gas concentration. They carry a handheld gas detector deep into the mine, extend the instrument's sampling probe into the tunnel, and take gas samples at different positions and heights according to regulations, and record the gas concentration value of each test.

[0004] Existing gas detectors are usually used underground in mines. Since gas sampling needs to be carried out at different heights, it is often difficult for workers at high positions to collect samples. In addition, since the air underground contains a large amount of dust particles, the exhaust holes will be blocked, affecting the gas sample from entering the detection instrument and affecting the accuracy of the gas detection operation. Summary of the Invention

[0005] The purpose of the present invention is to provide an underground gas detection device to solve the technical problems in the related art that the height position of the gas detector is inconvenient to adjust and the excessive impurity content in the gas sample affects the detection results.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a downhole gas detection device. The embodiments of the present invention disclose a downhole gas detection device, comprising a protective box and a gas detector placed in the protective box. A movable slot is provided at the bottom of the protective box. An air inlet at the bottom of the gas detector is provided with an air inlet pipe. An air pump is provided on the inner wall of the air inlet pipe. A fixing plate is fixedly connected to the side of the air inlet pipe. The side of the fixing plate is fixedly connected to the inner wall of the protective box. The bottom of the air inlet pipe is connected to a filter mechanism, the bottom of the filter mechanism is connected to a bellows, the bottom of the bellows passes through the movable groove and is fixedly connected to a limit ring; A lifting mechanism is provided in the protective box for driving the limit ring 401 to move back and forth in the vertical direction, and the lifting mechanism is connected to the bellows.

[0007] Preferably, the lifting mechanism includes a motor and a protective tube fixedly connected to the bottom wall of the protective box, the top of the motor is fixedly mounted on the bottom of the fixed plate, a rotating shaft is mounted on the bottom output end of the motor, and a screw is fixedly connected to the bottom of the rotating shaft.

[0008] Preferably, the bottom end of the screw rod passes through the movable groove and is connected to the bottom wall of the protective tube through a shaft. The protective tube is provided with a sliding groove facing the side of the bellows. A slider is threadedly connected to the screw rod. One side of the slider passes through the sliding groove and is fixedly connected to the limiting ring.

[0009] Preferably, the side of the limiting ring is fixedly connected to the limiting frame, the limiting frame is sleeved on the outside of the protective tube, the inner wall of the limiting frame is fixedly connected to a brush, and the inner surface of the brush abuts against the outer wall of the protective tube.

[0010] Preferably, the filter mechanism includes a filter tube, the top of the filter tube is threadedly connected to the air inlet pipe, and the filter tube is set as a transparent tube structure. The bottom of the filter tube is threadedly connected to a sealing cover, and the bottom of the sealing cover is threadedly connected to the corrugated pipe.

[0011] Preferably, a lamp tube is fixedly installed in the middle of the filter tube, and a silicone ring, a grid plate and a soda lime bag are sequentially sleeved on the lamp tube, and the top of the grid plate abuts the bottom of the silicone ring, and the bottom of the grid plate abuts the top of the soda lime bag.

[0012] Preferably, a support rod is fixedly connected to the middle of the sealing cover, a filter is fixedly connected between the support rod and the inner wall of the sealing cover, a rotating rod is connected to the center position of the bottom of the support rod through a bearing, a fixing ring and a driven gear are fixedly connected to the rotating rod, a cleaning brush is fixedly connected to the side of the fixing ring, and the top of the cleaning brush abuts against the filter.

[0013] Preferably, the driven gear is arranged below the fixing ring, a through groove is symmetrically opened on the top of the driven gear, an arc groove is opened on the side wall of the sealing cover, and the side of the driven gear is exposed to the outside of the sealing cover through the arc groove, the side wall of the driven gear is meshed and connected with the driving gear, and the driving gear is fixedly connected to the rotating shaft.

[0014] Preferably, a sealed door is installed on the outer wall of the protective box, an observation window is opened on the sealed door, and a control panel is installed on the outer wall of the sealed door.

[0015] A handle is fixedly connected to the top of the protection box, a universal wheel is installed at the bottom of the protection tube, a light-transmitting window is opened on one side of the protection box, and a storage box is fixedly connected to the inner wall of the protection box. Compared with the prior art, the present invention has the following beneficial effects: The present invention uses technical means such as a protective box, a gas detector, a filtering mechanism and a bellows to remove impurities from the inhaled gas, making the gas to be detected purer and the detection results more accurate. It overcomes the technical deficiencies in the prior art that the air underground contains a large amount of dust particles, which causes the suction holes to be clogged, affects the entry of gas samples into the detection instrument, and affects the accuracy of gas detection operations, thereby achieving the technical effect of extracting gas samples with higher purity and better detection effect.

[0016] The present invention adopts technical means that cooperate with a motor, a rotating shaft, a screw rod, a slider and a bellows. The rotation of the screw rod drives the slider to rise and fall linearly, and the slider drives the bellows to extend, thereby adjusting the extension length of the bellows. It overcomes the technical deficiency of the existing technology that relies on frequent manual lifting of hands to detect the gas content at a higher position, thereby improving the detection efficiency and safety of workers, making it more humane, simple to operate, flexible to adjust, and more practical.

[0017] The present invention adopts technical means that cooperate with a filter tube, a silicone ring, a soda lime bag, a filter screen and a cleaning brush. The silicone ring absorbs moisture in the gas sample, the soda lime bag absorbs carbon dioxide in the gas sample, and the filter screen filters dust in the gas sample, thereby overcoming the shortcomings of the existing technology, thereby making the gas sample detected by the gas detector higher in purity, the detection data more accurate, and the gas detector more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall external structure of the protective box of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the protective box of the present invention; Figure 3 This is a schematic diagram of the overall structure of the bellows of the present invention when it is in a downwardly extended state; Figure 4 This is a schematic diagram of the overall structure of the interior of the protective box of the present invention; Figure 5 This is a schematic diagram of the overall structure of the protective box from the side of the present invention; Figure 6 This is a schematic diagram of the overall structure of the filtering mechanism of the present invention; Figure 7 This is a schematic diagram of the decomposition structure of the filtering mechanism of the present invention; Figure 8 This is a schematic diagram of the overall structure of the limit frame installation of the present invention.

[0019] In the figure: 100, protective box; 101, observation window; 102, control panel; 103, handle; 104, universal wheel; 105, light-transmitting window; 106, movable slot; 107, sealed door; 108, storage box; 200, gas detector; 201, air intake pipe; 202, air pump; 203, fixing plate; 300, filter mechanism; 301, filter tube; 302, lamp tube; 303, silicone ring; 304, grid plate; 305, soda lime bag; 306, sealing cover; 307, support rod; 308, filter screen; 309, rotating rod; 310, arc groove; 311, fixing ring; 312, cleaning brush; 313, driven gear; 314, through groove; 315, driving gear; 400, bellows; 401, limit ring; 500, lifting mechanism; 501, motor; 502, rotating shaft; 503, screw rod; 504, protective tube; 505, slide; 506, slider; 600, limit frame; 601, brush. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The embodiment of the present invention discloses a downhole gas detection device, such as Figure 1-8 As shown, it includes: a protective box 100 and a gas detector 200 placed in the protective box 100. The protective box 100 has a movable slot 106 at the bottom. An air inlet at the bottom of the gas detector 200 is installed with an air inlet pipe 201. An air pump 202 is installed on the inner wall of the air inlet pipe 201. A fixing plate 203 is fixedly connected to the side of the air inlet pipe 201. The side of the fixing plate 203 is fixedly connected to the inner wall of the protective box 100. It should be noted that the bottom of the air inlet pipe 201 is connected to a filter mechanism 300, the bottom of the filter mechanism 300 is connected to a bellows 400, and the bottom of the bellows 400 passes through the movable groove 106 and is fixedly connected to a limit ring 401; It should be noted that a lifting mechanism 500 is provided in the protective box 100 for driving the limit ring 401 to move back and forth in the vertical direction, and the lifting mechanism 500 is connected to the bellows 400 .

[0022] The working principle and beneficial effects of the above technical solution are: Working principle: During the use of the present invention, workers first need to inspect the gas detector 200 to ensure that its appearance is not damaged, the parts are complete, and the connections between the parts are firm and reliable before conducting the detection work.

[0023] During use, start the air pump 202 to absorb the gas at the detection position into the filter mechanism 300 through the bellows 400. After filtering by the filter mechanism 300, the gas enters the gas detector 200 through the air inlet pipe 201 for rapid detection. The bellows 400 can be extended in conjunction with the lifting mechanism 500, and its length can be quickly adjusted for easy detection.

[0024] Beneficial effects: The present invention adopts the technical means of cooperating the protective box 100, the gas detector 200, the filter mechanism 300 and the bellows 400 to remove impurities from the inhaled gas through the filter mechanism 300, so that the gas to be detected is purer and the detection results are more accurate. It overcomes the technical deficiencies in the prior art that the air underground contains a large amount of dust particles, which leads to the blockage of the suction holes, affects the entry of the gas sample into the detection instrument, and affects the accuracy of the gas detection operation, thereby achieving the technical effect of higher purity of the extracted gas sample and better detection effect.

[0025] In a specific embodiment: the lifting mechanism 500 includes a motor 501 and a protective tube 504 fixedly connected to the bottom wall of the protective box 100, the top of the motor 501 is fixedly installed on the bottom of the fixed plate 203, the bottom output end of the motor 501 is installed with a rotating shaft 502, and the bottom of the rotating shaft 502 is fixedly connected to a screw rod 503.

[0026] It should be noted that the bottom end of the screw rod 503 passes through the movable groove 106 and is connected to the bottom wall of the protective tube 504 through a shaft. The protective tube 504 is provided with a slide groove 505 on the side facing the bellows 400. A slider 506 is threadedly connected to the screw rod 503. One side of the slider 506 passes through the slide groove 505 and is fixedly connected to the limiting ring 401.

[0027] It should be noted that the side of the limiting ring 401 is fixedly connected to the limiting frame 600, the limiting frame 600 is sleeved on the outside of the protective tube 504, and the inner wall of the limiting frame 600 is fixedly connected to a brush 601, and the inner surface of the brush 601 abuts against the outer wall of the protective tube 504.

[0028] The working principle and beneficial effects of the above technical solution are: Working principle: During use of the present invention, the motor 501 drives the rotating shaft 502 to rotate, and the rotating shaft 502 drives the screw rod 503 to rotate. The protective tube 504 is provided to facilitate the protection of the screw rod 503 and extend the service life of the screw rod 503. The slider 506 is driven to move by the screw rod 503. The slider 506 is restricted by the slide groove 505 to ensure stable linear lifting. The slider 506 drives the bellows 400 to move through the limit ring 401, thereby adjusting the length of the bellows 400, and then used in conjunction with the position to be detected.

[0029] Beneficial effects: The present invention adopts technical means that cooperate with the motor 501, the rotating shaft 502, the screw rod 503, the slider 506 and the bellows 400. The rotation of the screw rod 503 drives the slider 506 to rise and fall linearly, and the slider 506 drives the bellows 400 to extend, thereby adjusting the extension length of the bellows 400, overcoming the technical deficiency of relying on manual frequent hand-lifting to detect the gas content at a higher position in the prior art, thereby improving the workers' detection efficiency and detection safety, being more humane, simple to operate, flexible to adjust, and more practical.

[0030] In a specific embodiment: the filter mechanism 300 includes a filter tube 301, the top of the filter tube 301 is threadedly connected to the air inlet pipe 201, and the filter tube 301 is set to a transparent tube structure, the bottom of the filter tube 301 is threadedly connected to a sealing cover 306, and the bottom of the sealing cover 306 is threadedly connected to the bellows 400.

[0031] It should be noted that a lamp tube 302 is fixedly installed in the middle of the filter inlet tube 301, and a silicone ring 303, a grid plate 304 and a soda lime bag 305 are sequentially sleeved on the lamp tube 302, and the top of the grid plate 304 abuts against the bottom of the silicone ring 303, and the bottom of the grid plate 304 abuts against the top of the soda lime bag 305.

[0032] It should be noted that a support rod 307 is fixedly connected to the middle of the sealing cover 306, a filter screen 308 is fixedly connected between the support rod 307 and the inner wall of the sealing cover 306, a rotating rod 309 is connected to the center position of the bottom of the support rod 307 through a bearing, a fixing ring 311 and a driven gear 313 are fixedly connected to the rotating rod 309, a cleaning brush 312 is fixedly connected to the side of the fixing ring 311, and the top of the cleaning brush 312 abuts against the filter screen 308.

[0033] In addition, the driven gear 313 is arranged below the fixing ring 311, and a through groove 314 is symmetrically opened on the top of the driven gear 313. An arc groove 310 is opened on the side wall of the sealing cover 306, and the side of the driven gear 313 is exposed to the outside of the sealing cover 306 through the arc groove 310. The side wall of the driven gear 313 is meshed with the driving gear 315, and the driving gear 315 is fixedly connected to the rotating shaft 502.

[0034] The working principle and beneficial effects of the above technical solution are: Working principle: During the use of the present invention, the gas sample enters the filter tube 301 through the bellows 400 for filtration treatment. The gas sample first passes through the filter screen 308 provided on the sealing cover 306 to remove impurities and dust contained therein, and then passes through the soda lime bag 305. The soda lime bag 305 absorbs carbon dioxide in the gas sample. Finally, the gas sample enters the silicone ring 303. The silicone ring 303 absorbs moisture in the gas sample. The filtered gas sample enters the gas detector 200 for detection, and the detection effect is more accurate. The driving gear 315 is driven to rotate by the rotating shaft 502. The driving gear 315 drives the driven gear 313 to rotate by meshing, and the driven gear 313 drives the rotating rod 30 9 rotates, and the cleaning brush 312 is driven to move through the fixing ring 311 to quickly clean the filter 308 to prevent the filter 308 from being blocked. The entire filter tube 301 is a detachable structure, which is convenient for replacing and cleaning the various components placed inside, and is more practical. By providing a lamp tube 302, the light emitted by the lamp tube 302 is emitted outward through the silicone ring 303 and the soda lime bag 305. The silicone ring 303 is blue during its effective use period and will turn white when it expires. The soda lime bag 305 is yellow during its effective period and will also turn white when it expires. Workers can quickly replace the silicone ring 303 and the soda lime bag 305 by directly observing the color of the light emitted by the lamp tube 302.

[0035] Beneficial effects: The present invention adopts technical means that cooperate with the filter tube 301, the silicone ring 303, the soda lime bag 305, the filter screen 308 and the cleaning brush 312. The silicone ring 303 absorbs moisture in the gas sample, the soda lime bag 305 absorbs carbon dioxide in the gas sample, and the filter screen 308 filters dust in the gas sample, thereby overcoming the shortcomings of the existing technology, thereby making the gas sample detected by the gas detector 200 higher in purity, the detection data more accurate, and the gas detector 200 more practical.

[0036] In a specific embodiment, a sealed door 107 is installed on the outer wall of the protective box 100 , an observation window 101 is opened on the sealed door 107 , and a control panel 102 is installed on the outer wall of the sealed door 107 .

[0037] It should be noted that a handle 103 is fixedly connected to the top of the protection box 100, a universal wheel 104 is installed at the bottom of the protection tube 504, a light-transmitting window 105 is opened on one side of the protection box 100, and a storage box 108 is fixedly connected to the inner wall of the protection box 100.

[0038] The working principle and beneficial effects of the above technical solution are: During use of the present invention, the protection box 100 is provided to facilitate protection of the gas detector 200 to avoid bumps, the sealing door 107 is provided to facilitate opening and closing of the protection box 100, so that the gas detector 200 can be regularly inspected, the observation window 101 is provided to facilitate intuitive viewing of the data displayed on the gas detector 200, the handle 103 is provided in conjunction with the universal wheel 104, and the gas detector 200 is convenient to carry lightly and more labor-saving, the light-transmitting window 105 is provided to facilitate workers to intuitively see the changes in the color of the light emitted by the lamp tube 302, and the storage box 108 is provided to facilitate neat storage of the components required for the device, which is more humane.

[0039] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A downhole gas detection device, comprising a protection box (100) and a gas detector (200) placed in the protection box (100), characterized in that: A movable groove (106) is provided at the bottom of the protection box (100); an air inlet (201) is installed at the bottom air inlet of the gas detector (200); an air pump (202) is installed on the inner wall of the air inlet pipe (201); a fixing plate (203) is fixedly connected to the side of the air inlet pipe (201); and a side of the fixing plate (203) is fixedly connected to the inner wall of the protection box (100); The bottom of the air inlet pipe (201) is connected to a filter mechanism (300), the bottom of the filter mechanism (300) is connected to a bellows (400), and the bottom of the bellows (400) passes through the movable groove (106) and is fixedly connected to a limiting ring (401); A lifting mechanism (500) is provided in the protection box (100) for driving the limiting ring (401) to move back and forth in a vertical direction.

2. The downhole gas detection device according to claim 1, characterized in that: The lifting mechanism (500) comprises a motor (501) and a protective tube (504) fixedly connected to the bottom wall of the protective box (100); the top of the motor (501) is fixedly mounted on the bottom of the fixed plate (203); a rotating shaft (502) is mounted on the bottom output end of the motor (501); and a screw rod (503) is fixedly connected to the bottom of the rotating shaft (502).

3. The downhole gas detection device according to claim 2, characterized in that: The bottom end of the screw rod (503) passes through the movable groove (106) and is connected to the bottom wall of the protective tube (504) through a shaft. The protective tube (504) is provided with a sliding groove (505) on the side facing the bellows (400). A slider (506) is threadedly connected to the screw rod (503). One side of the slider (506) passes through the sliding groove (505) and is fixedly connected to the limiting ring (401).

4. The downhole gas detection device according to claim 3, characterized in that: The side of the limiting ring (401) is fixedly connected to a limiting frame (600), the limiting frame (600) is sleeved on the outside of the protective tube (504), the inner wall of the limiting frame (600) is fixedly connected to a brush (601), and the inner surface of the brush (601) abuts against the outer wall of the protective tube (504).

5. The downhole gas detection device according to claim 2, characterized in that: The filtering mechanism (300) comprises a filtering tube (301), the top of the filtering tube (301) being threadedly connected to the air inlet pipe (201), and the filtering tube (301) being configured as a transparent tube structure, the bottom of the filtering tube (301) being threadedly connected to a sealing cover (306), and the bottom of the sealing cover (306) being threadedly connected to the bellows (400).

6. The downhole gas detection device according to claim 5, characterized in that: A lamp tube (302) is fixedly mounted in the middle of the filter tube (301), and a silicone ring (303), a grid plate (304), and a soda lime bag (305) are sequentially sleeved on the lamp tube (302), wherein the top of the grid plate (304) abuts against the bottom of the silicone ring (303), and the bottom of the grid plate (304) abuts against the top of the soda lime bag (305).

7. The downhole gas detection device according to claim 6, characterized in that: A support rod (307) is fixedly connected to the middle of the sealing cover (306), a filter screen (308) is fixedly connected between the support rod (307) and the inner wall of the sealing cover (306), a rotating rod (309) is connected to the center position of the bottom of the support rod (307) through a bearing, a fixing ring (311) and a driven gear (313) are fixedly connected to the rotating rod (309), a cleaning brush (312) is fixedly connected to the side of the fixing ring (311), and the top of the cleaning brush (312) abuts against the filter screen (308).

8. The downhole gas detection device according to claim 7, characterized in that: The driven gear (313) is arranged below the fixing ring (311), and a through groove (314) is symmetrically provided on the top of the driven gear (313). An arcuate groove (310) is provided on the side wall of the sealing cover (306), and the side of the driven gear (313) is exposed to the outside of the sealing cover (306) through the arcuate groove (310). The side wall of the driven gear (313) is meshedly connected with a driving gear (315), and the driving gear (315) is fixedly connected to the rotating shaft (502).

9. The downhole gas detection device according to claim 1, characterized in that: A sealing door (107) is installed on the outer wall of the protection box (100), an observation window (101) is provided on the sealing door (107), and a control panel (102) is installed on the outer wall of the sealing door (107).

10. The downhole gas detection device according to claim 2, characterized in that: A handle (103) is fixedly connected to the top of the protection box (100), a universal wheel (104) is installed at the bottom of the protection tube (504), a light-transmitting window (105) is opened on one side of the protection box (100), and a storage box (108) is fixedly connected to the inner wall of the protection box (100).

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