A portable device for detecting carbon monoxide concentration in a well

Abstract

This invention belongs to the field of detection technology, specifically a portable downhole carbon monoxide concentration detection device. It includes a detector body; an acquisition component installed at the bottom of the gas chamber; the acquisition component includes a vertical cylinder; a first gas groove on the vertical cylinder; a collection cylinder sliding inside the vertical cylinder; sealing plates fixedly installed at the top and bottom of the collection cylinder; a second gas groove on the collection cylinder, initially corresponding to the first gas groove; a sliding plate sliding inside the collection cylinder; a drive rod fixedly installed on the sealing plate at the bottom of the collection cylinder; a drive plate rotating at the bottom of the drive rod, and the drive plate sliding within the first gas groove; a first motor installed at the bottom of the drive plate; and an air inlet component on the sealing plate at the top of the collection cylinder. This invention, by setting up the acquisition component, can avoid the possibility of mixing new and old gases, which could cause deviations in the detection results from the actual gas concentration in the mine.

Description

Technical Field

[0001] This invention belongs to the field of detection technology, specifically a portable downhole carbon monoxide concentration detection device. Background Technology

[0002] In mining environments, carbon monoxide is an extremely hazardous toxic gas with a wide range of sources, including spontaneous combustion of coal, blasting operations, and friction combustion due to equipment malfunctions. Carbon monoxide is colorless, odorless, and non-irritating. When inhaled, it rapidly binds to hemoglobin in the blood, hindering oxygen transport and causing tissue hypoxia. Short-term exposure to high concentrations can lead to poisoning and even death. Furthermore, high concentrations of carbon monoxide mixed with air pose an explosion risk, seriously threatening mine safety and the lives of workers.

[0003] Currently, the commonly used carbon monoxide detection instruments in mines are infrared absorption spectrometers, among which most fixed detection devices employ a suction sampling method. This involves drawing the gas to be tested from the mine into a gas chamber inside the detector via a built-in air pump or external air pipe, and then using an infrared light source module to analyze the concentration of the gas within the chamber. This method relies on a closed gas flow path formed between the air pipe and the gas chamber to ensure sufficient contact between the gas and the sensor, thereby completing the conversion and output of the concentration signal. However, in practical applications, the gas extraction detector has a significant problem with gas residue. Specifically, after a test is completed, some of the previously extracted mine gas remains in the gas pipe and gas chamber. When the next test is conducted, the newly extracted gas to be tested enters the pipeline and mixes with these residual gases, resulting in a deviation between the test results and the actual gas concentration in the mine. Moreover, the degree of deviation changes dynamically with the ratio of residual gas volume to new gas flow rate, which is difficult to eliminate through simple calibration. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a portable underground carbon monoxide concentration detection device. By setting up acquisition components, the possibility of mixing of new and old gases can be avoided, which could lead to a deviation between the detection results and the actual gas concentration in the mine. The specific structure is as follows. A portable downhole carbon monoxide concentration detection device includes a detector body; a detection head is installed at the bottom of the detector body; an infrared light source detection module is provided inside the detection head; and a gas chamber is installed at the bottom of the detector body. An acquisition component is installed at the bottom of the air chamber; the acquisition component includes a vertical cylinder; a first air groove is provided on the vertical cylinder, and the first air groove penetrates the vertical cylinder; A collection tube slides inside the vertical cylinder; sealing plates are fixedly installed at the top and bottom of the collection tube; a second air groove is provided on the collection tube, and the second air groove penetrates the collection tube. In the initial state, the second air groove corresponds to the first air groove. A sliding disc slides inside the collection tube; an arc-shaped block is fixedly installed on the side of the sliding disc facing the second air groove, and the arc-shaped block slides inside the second air groove, and the outer diameter of the arc-shaped block is the same as the outer diameter of the collection tube. A drive rod is fixedly installed on the sealing plate at the bottom of the collection tube; a drive plate is rotatably mounted on the bottom of the drive rod, and the drive plate slides in the first air groove and partially extends out of the first air groove; a first motor is mounted on the bottom of the drive plate, and the first motor is used to control the rotation of the drive rod. The air chamber is equipped with second electric actuators on both sides, and the extension rods of the two second electric actuators are fixed on both sides of the drive plate. A third electric actuator is installed on the sealing plate at the bottom of the collection cylinder, and the extension rod of the third electric actuator is fixed to the bottom of the slide plate; the third electric actuator is located above the drive plate; An air intake assembly is provided on the sealing plate at the top of the collection tube.

[0005] In a preferred embodiment of the present invention, the gas chamber is a rectangular chamber, and sealing plates are fixedly installed on both sides of the gas chamber; the gas chamber is installed on the top of the mine shaft via a mounting frame; A rectangular block slides inside the air chamber; a first electric actuator is fixedly installed on the right side of the air chamber, and the extension rod of the first electric actuator is fixed on the rectangular block; The detection head extends into the gas chamber and is located on the left side of the rectangular block; a control valve is installed inside the sealing plate on the left side of the gas chamber; The sealing plate at the top of the collection tube is arc-shaped; the air intake assembly includes an air intake cylinder; the air intake cylinder is installed on the top of the sealing plate, and the top of the air intake cylinder is closed; The air inlet cylinder is provided with an air outlet groove, and the air outlet groove is initially opposite to the first air groove. The bottom of the gas chamber is provided with an arc-shaped groove, which is opposite to the sealing plate at the top of the collection cylinder; a circular groove is provided inside the arc-shaped groove. An air intake slot is provided on the left side of the circular groove, and the air intake slot extends to the upper left and extends to the left side of the rectangular block; A sealing block is slidably connected to the circular groove by a spring, and the sealing block is initially flush with the bottom surface of the air chamber, thus sealing the air inlet groove.

[0006] In a preferred embodiment of the present invention, an annular plate is fixedly connected to the bottom of the air inlet cylinder on the bottom surface of the sealing plate; The inner ring of the annular plate is threaded; the inner ring of the annular plate is threaded to engage with an annular cylinder, and a first filter screen is installed at the bottom of the annular cylinder; The top of the sealing plate located above the collection tube has evenly arranged countersunk holes, and each countersunk hole is equipped with a countersunk bolt. The other side of each countersunk bolt is engaged with the top of the collection tube.

[0007] In a preferred embodiment of the present invention, a support plate is provided below the first filter screen, and the support plate is fixedly installed on the inner ring of the collection cylinder; a through hole is provided in the middle of the sliding plate; A rotating rod is rotatably installed inside the support plate. The top of the rotating rod extends above the support plate, and the bottom of the rotating rod extends through a through hole to the bottom of the slide plate. A spiral groove is formed on the outer ring surface of the rotating rod; a sliding shaft is fixedly connected inside the through hole, and the sliding shaft slides in the spiral groove. The top of the rotating rod is provided with a brush layer, and the brush layer is in contact with the surface of the first filter screen.

[0008] In a preferred embodiment of the present invention, a rubber block is installed on the top of the support plate, and the rubber block intersects with the brush layer.

[0009] In a preferred embodiment of the present invention, the vertical cylinder comprises an upper half-cylinder and a lower half-cylinder; The upper cylinder is fixedly installed at the bottom of the gas chamber by bolts; the upper cylinder and the lower cylinder are fixedly connected by bolts; the first gas slots on the upper cylinder and the lower cylinder correspond to each other and are interconnected; the lower cylinder has different length specifications. The second electric actuator is a multi-stage telescopic rod.

[0010] As a preferred embodiment of the present invention, rotating plates are installed on both sides of the air chamber; The rotating plate is rotatably mounted on the bottom of the mounting frame and driven by a second motor.

[0011] In a preferred embodiment of the present invention, the side of the rectangular block facing the control valve is cylindrical; A rectangular frame slides on the cylindrical shape of the rectangular block, and the inner circle of the rectangular frame is circular; the rectangular frame is connected to the rectangular block by a spring. The rectangular frame is initially positioned above the air inlet slot; an air inlet is provided at the bottom of the rectangular frame, and the air inlet corresponds to the air inlet slot; a second filter is installed on the side of the rectangular block closest to the detection head.

[0012] In a preferred embodiment of the present invention, a groove is provided on the top end face of the rectangular frame, and a wiping layer is fixedly connected in the groove.

[0013] In a preferred embodiment of the present invention, the sealing plate is fixed to both sides of the gas chamber by bolts.

[0014] The beneficial effects of this invention are as follows: 1. The present invention discloses a portable underground carbon monoxide concentration detection device. By controlling the second gas groove on the collection cylinder to rotate into the vertical cylinder, the gas in the collection cylinder can be sealed to avoid interference from external gases. Then, by controlling the collection cylinder to move directly upward, the gas is introduced into the gas chamber for detection through the air inlet cylinder. In the whole process, due to the tubeless design, the gas is not transported over long distances through traditional pipelines, thus avoiding the residual gas from the previous extraction in the pipeline. At the same time, the detected gas is pushed out by the rectangular block, which can avoid the presence of gas in the gas chamber. It can also ensure that each detection is based on a pure new gas sample, thereby avoiding the possibility of mixing of new and old gases, which would cause the detection results to deviate from the actual gas concentration in the mine.

[0015] 2. The portable underground carbon monoxide concentration detection device of the present invention, by controlling the upward movement of the collection tube and directly connecting the collection tube with the gas chamber, can shorten the gas transmission path and time compared with the transmission using long pipelines, so that the collected gas can enter the detection area in a short time and there is no mixing with the old and new gas. This can reduce gas transmission delay, avoid delays that lead to delayed safety warnings and missed best handling opportunities, and also avoid distorted concentration judgments that expand the scope of the danger and seriously threaten personnel life and mine production safety.

[0016] 3. The portable downhole carbon monoxide concentration detection device of the present invention has a first filter screen installed at the bottom of the annular cylinder. During the process of the sliding plate moving upward and pushing the gas into the air inlet cylinder, the gas above the sliding plate will first pass through the first filter screen and then enter the air inlet cylinder through the annular plate. During the process of the gas passing through the first filter screen, the first filter screen will filter the dust in the gas, so that the relatively clean gas enters the gas chamber for detection, avoiding dust from entering the gas chamber and affecting the detection process of the detection head. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a state diagram of the component in its initial state obtained in this invention; Figure 3 This is a state diagram of the gas acquisition component introducing gas into the gas chamber in this invention; Figure 4 This is an exploded view of the component obtained in this invention; Figure 5 This is the present invention. Figure 4 Enlarged view of a portion of point A in the middle; Figure 6 This is a top view of the entire invention; Figure 7This is the present invention. Figure 6 A cross-sectional view at point BB of the detector body and acquisition components in their initial state; Figure 8 This is the present invention. Figure 7 Enlarged view of a section at point C; Figure 9 This is the present invention. Figure 7 Enlarged view of a section at point D; Figure 10 This is the present invention. Figure 6 Cross-sectional view of the detector body and acquisition components introducing gas into the gas chamber at point BB; Figure 11 This is the present invention. Figure 10 Enlarged view of a section at point E in the middle; Figure 12 This is the present invention. Figure 10 Enlarged view of a section at point F.

[0019] In the diagram: 1. Detector body; 11. Detection head; 12. Air chamber; 13. Sealing plate; 131. Control valve; 14. Rotating plate; 15. Second motor; 16. Mounting bracket; 2. Rectangular block; 21. First electric actuator; 22. Rectangular frame; 23. Air inlet; 24. Second filter screen; 25. Wiping layer; 3. Vertical cylinder; 31. First air tank; 32. Upper cylinder; 33. Lower cylinder; 4. Collection cylinder; 41. Sealing plate; 42. Second air tank; 43. 44. Sliding disc; 45. Arc-shaped block; 46. Drive rod; 47. Drive plate; 48. First motor; 49. Second electric push rod; 50. Third electric push rod; 51. Air inlet cylinder; 52. Air outlet groove; 53. Circular groove; 54. Air inlet groove; 65. Sealing block; 66. Annular plate; 67. Annular cylinder; 68. First filter screen; 69. Countersunk hole; 60. Support plate; 61. Rotating rod; 62. Spiral groove; 63. Sliding shaft; 64. Brush layer; 65. Rubber block. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 12 As shown, the present invention provides a portable downhole carbon monoxide concentration detection device, which, as an embodiment of the present invention, includes a detector body 1; a detection head 11 is installed at the bottom of the detector body 1; an infrared light source detection module is provided inside the detection head 11; and a gas chamber 12 is installed at the bottom of the detector body 1. The bottom of the air chamber 12 is equipped with an acquisition component; the acquisition component includes a vertical cylinder 3; the vertical cylinder 3 is provided with a first air groove 31, and the first air groove 31 penetrates the vertical cylinder 3; A collection tube 4 slides inside the vertical tube 3; a sealing plate 41 is fixedly installed at the top and bottom of the collection tube 4; a second air groove 42 is provided on the collection tube 4, and the second air groove 42 penetrates the collection tube 4. In the initial state, the second air groove 42 corresponds to the first air groove 31. A sliding plate 43 is slidable inside the collection tube 4; an arc-shaped block 44 is fixedly installed on the side of the sliding plate 43 facing the second air groove 42, and the arc-shaped block 44 slides inside the second air groove 42, and the outer diameter of the arc-shaped block 44 is the same as the outer diameter of the collection tube 4. A drive rod 45 is fixedly installed on the sealing plate 41 at the bottom of the collection tube 4; a drive plate 46 is rotatably mounted on the bottom of the drive rod 45, and the drive plate 46 slides in the first air groove 31 and partially extends out of the first air groove 31; a first motor 47 is installed on the bottom of the drive plate 46, and the first motor 47 is used to control the rotation of the drive rod 45. The air chamber 12 is equipped with two second electric actuators 48 on both sides of its surface, and the extension rods of the two second electric actuators 48 are fixed on both sides of the drive plate 46. A third electric actuator 49 is installed on the sealing plate 41 at the bottom of the collection cylinder 4, and the extension rod of the third electric actuator 49 is fixed to the bottom of the slide plate 43; the third electric actuator 49 is located above the drive plate 46. An air intake assembly is provided on the sealing plate 41 at the top of the collection cylinder 4; In this embodiment, the gas chamber 12 is a rectangular chamber, and sealing plates 13 are fixedly installed on both sides of the gas chamber 12; the gas chamber 12 is installed on the top of the mine through a mounting frame 16; A rectangular block 2 slides inside the air chamber 12; a first electric actuator 21 is fixedly installed on the right side of the air chamber 12, and the extension rod of the first electric actuator 21 is fixed on the rectangular block 2. The detection head 11 extends into the air chamber 12 and is located on the left side of the rectangular block 2; a control valve 131 is installed in the sealing plate 13 on the left side of the air chamber 12; The sealing plate 41 at the top of the collection tube 4 is arc-shaped; the air intake assembly includes an air intake cylinder 5; the air intake cylinder 5 is installed on the top of the sealing plate 41, and the top of the air intake cylinder 5 is closed. The air inlet cylinder 5 is provided with an air outlet groove 51, and the air outlet groove 51 is initially opposite to the first air groove 31. The bottom of the gas chamber 12 is provided with an arc-shaped groove, which is opposite to the sealing plate 41 at the top of the collection cylinder 4; a circular groove 52 is provided inside the arc-shaped groove; An air inlet groove 53 is provided on the left side of the circular groove 52, and the air inlet groove 53 extends to the upper left and extends to the left side of the rectangular block 2; A sealing block 54 is slidably connected to the circular groove 52 by a spring, and the sealing block 54 is initially flush with the bottom surface of the air chamber 12, thus blocking the air inlet groove 53.

[0022] During implementation, the mounting bracket 16 is first installed on the top of the mine tunnel with bolts, and the first gas groove 31 on the vertical cylinder 3 is aligned with the mine tunnel. Therefore, the gas in the mine tunnel will enter the vertical cylinder 3 through the first gas groove 31 and then flow out from the other first gas groove 31. Since the second gas groove 42 on the sliding collection cylinder 4 inside the vertical cylinder 3 corresponds to the first gas groove 31, and the gas in the mine tunnel also enters the collection cylinder 4 through the second gas groove 42 and then flows out through the other second gas groove 42, a detector body 1 and an acquisition component can be installed at every end in the mine tunnel. After all the detector bodies 1 are installed, the detector bodies 1 and the acquisition components are connected to the controller, and carbon monoxide inside the mine can be detected. Specifically, since the gas inside the mine enters the collection cylinder 4 through the first gas groove 31 and the second gas groove 42, when detecting carbon monoxide, the first motor 47 is controlled to drive the drive rod 45 to rotate 90 degrees. The drive rod 45 will drive the sealing plate 41 at the bottom of the collection cylinder 4 to rotate 90 degrees, thus causing the collection cylinder 4 to rotate 90 degrees. During the rotation of the collection cylinder 4, the second gas groove 42, the sliding plate 43, the top sealing plate 41, the second electric push rod 48, the air inlet cylinder 5, and the air outlet groove 51 opened on the air inlet cylinder 5 will all rotate 90 degrees. After the second gas groove 42 rotates, it will move into the position inside the vertical cylinder 3 where the first gas groove 31 is not opened. And it fits against the inner ring surface of the vertical cylinder 3, thereby sealing the collection cylinder 4. At this time, the gas originally located inside the collection cylinder 4 is sealed inside the collection cylinder 4. Then, the second electric push rod 48 is controlled to retract, thereby pulling the drive plate 46 to move upward. The upward drive plate 46 will drive the drive rod 45, collection cylinder 4, slide plate 43, third electric push rod 49, top sealing plate 41 and air inlet cylinder 5 to move upward. When the collection cylinder 4 moves to the bottom of the gas chamber 12, the top sealing plate 41 fits against the arc groove, and the air inlet cylinder 5 will be inserted into the circular groove 52, pushing the sealing block 54 in the circular groove 52 to move upward and compressing the spring. The air outlet groove 51 opened on the air inlet cylinder 5 will be connected to the air inlet groove 53. Subsequently, the third electric actuator 49 is extended, which pushes the sealing plate 41 upward, and the sealing plate 41 drives the arc block 44 upward along the second gas groove 42. When the sliding plate 43 and the arc block 44 move upward, the gas above the sliding plate 43 is pushed upward. The gas above the sliding plate 43 is gradually pushed into the air inlet cylinder 5, and then enters the air inlet groove 53 through the air outlet groove 51 on the air inlet cylinder 5. The gas in the air inlet groove 53 enters the space on the left side of the rectangular block 2. Then the infrared light source detection module in the detection head 11 emits infrared light to detect the carbon monoxide concentration inside the gas. If the carbon monoxide concentration in the detected gas exceeds the standard range, the detector body 1 will issue an alarm. If the carbon monoxide concentration in the detected gas is within the standard range, the detector body 1 will not issue an alarm. More specifically, after the detection is completed, the second electric actuator 48 is extended to its initial position, thereby moving the collection cylinder 4 down to its initial position. Then, the third electric actuator 49 is retracted to its initial state, thereby moving the sliding plate 43 back to its initial state. Subsequently, the first motor 47 is rotated 90 degrees in the opposite direction, thereby moving the collection cylinder 4, the second air groove 42, the sliding plate 43, the third electric actuator 49, the sealing plate 41, and the air inlet cylinder 5 back to their initial states, and the second air groove 42 is aligned with the first air groove 31 again, allowing the gas inside the mine to enter the collection cylinder 4. When the air inlet cylinder 5 disengages from the circular groove... After step 52, the sealing block 54 returns to its initial position under the push of the spring and re-seals the air inlet slot 53; at the same time, the first electric push rod 21 is extended, which pushes the rectangular block 2 toward the side of the control valve 131 and opens the control valve 131. During the movement of the rectangular block 2, the gas is pushed and pushed out of the gas chamber 12. When the rectangular block 2 is attached to the sealing plate 13 on the left side of the gas chamber 12, the control valve 131 is closed. Then the first electric push rod 21 is controlled to drive the rectangular block 2 back to its initial state, and then waits for the next test. In summary, by controlling the second gas slot 42 on the collection cylinder 4 to rotate into the vertical cylinder 3, the gas inside the collection cylinder 4 can be sealed to prevent interference from external gases. Then, by controlling the collection cylinder 4 to move directly upward, the gas is introduced into the gas chamber 12 for detection through the air inlet cylinder 5. Throughout the process, due to the tubeless design, the gas is not transported over long distances through traditional pipelines, thus avoiding the residual gas from the previous extraction in the pipeline. At the same time, the detected gas is pushed out by the rectangular block 2, which can prevent the presence of gas in the gas chamber 12. This also ensures that each detection is based on a pure new gas sample, thereby avoiding the possibility of mixing of new and old gases, which could cause the detection results to deviate from the actual gas concentration in the mine.

[0023] Meanwhile, by controlling the upward movement of the collection cylinder 4 and directly connecting it to the gas chamber 12, the gas transmission path and time can be shortened compared to the transmission through a long pipeline. This allows the collected gas to enter the detection area in a short time without mixing with the old and new gases. This reduces gas transmission delays and avoids delays that could lead to delayed safety warnings, missed opportunities for optimal response, and distorted concentration judgments that could expand the scope of the danger and seriously threaten personnel lives and mine production safety.

[0024] As one embodiment of the present invention; the bottom of the air inlet cylinder 5 is fixedly connected to the bottom surface of the sealing plate 41 with an annular plate 6; The inner ring of the annular plate 6 is threaded; the inner ring of the annular plate 6 is threaded to engage with an annular cylinder 61, and a first filter screen 62 is installed at the bottom of the annular cylinder 61. The top of the sealing plate 41 located above the collection cylinder 4 is provided with evenly arranged countersunk holes 63, and countersunk bolts are provided in each of the countersunk holes 63. The other side of each countersunk bolt is engaged with the top of the collection cylinder 4. In this embodiment, a support plate 64 is provided below the first filter screen 62, and the support plate 64 is fixedly installed in the inner ring of the collection cylinder 4; a through hole is provided in the middle of the sliding plate 43; A rotating rod 65 is rotatably mounted inside the support plate 64. The top of the rotating rod 65 extends above the support plate 64, and the bottom of the rotating rod 65 extends through the through hole to below the slide plate 43. A spiral groove 66 is provided on the outer ring surface of the rotating rod 65; a sliding shaft 67 is fixedly connected in the through hole, and the sliding shaft 67 slides in the spiral groove 66. The top of the rotating rod 65 is provided with a brush layer 68, and the brush layer 68 is in contact with the surface of the first filter screen 62. In this embodiment, a rubber block 69 is installed on the top of the support plate 64, and the rubber block 69 intersects with the brush layer 68; During implementation, since the bottom of the annular cylinder 61 is equipped with a first filter screen 62, as the sliding plate 43 moves upward and pushes the gas into the air inlet cylinder 5, the gas above the sliding plate 43 will first pass through the first filter screen 62, and then enter the air inlet cylinder 5 through the annular plate 6. During the process of the gas passing through the first filter screen 62, the first filter screen 62 will filter the dust in the gas, so that the relatively clean gas enters the gas chamber 12 for detection, avoiding dust from entering the gas chamber 12 and thus affecting the detection process of the detection head 11; Specifically, since the support plate 64 has a rotating rod 65 with a spiral groove 66, and the spiral groove 66 is slidably connected to the sliding shaft 67 in the through hole, when the sliding plate 43 moves upward, it will drive the sliding shaft 67 to move upward along the spiral groove 66, which will drive the rotating rod 65 to rotate. When the rotating rod 65 rotates, it will drive the brush layer 68 to rotate. The rotating brush layer 68 will act on the first filter screen 62, thereby cleaning the first filter screen 62 and sweeping off the dust on the first filter screen 62 to avoid clogging. When the sliding plate 43 moves downward, it will also drive the brush layer 68 to rotate, which can clean the first filter screen 62 again and further prevent the first filter screen 62 from clogging. More specifically, since the support plate 64 is equipped with a rubber block 69, when the brush layer 68 rotates, it will hit the rubber block 69. Subsequently, the rubber block 69 will be gradually bent, and the brush layer 68 will pass over the rubber block 69. When the brush layer 68 hits the rubber block 69, it will vibrate, which can shake off the dust on the brush layer 68. Furthermore, when the first filter screen 62 needs to be replaced, the countersunk bolt in the countersunk hole 63 is removed using the bolt, so that the top sealing plate 41 can be removed from the collection cylinder 4. Then, the annular cylinder 61 is rotated to remove the annular cylinder 61 from the annular plate 6, and then the filter screen can be replaced. After the replacement is completed, the above operation is repeated in reverse.

[0025] As one embodiment of the present invention; the vertical cylinder 3 includes an upper half-cylinder 32 and a lower half-cylinder 33; The upper cylinder 32 is fixedly installed at the bottom of the air chamber 12 by bolts; the upper cylinder 32 and the lower cylinder 33 are fixedly connected by bolts; the first air grooves 31 on the upper cylinder 32 and the lower cylinder 33 correspond to each other and are interconnected; the lower cylinder 33 has different length specifications. The second electric actuator 48 is a multi-stage telescopic rod; In this embodiment, rotating plates 14 are installed on both sides of the air chamber 12; The rotating plate 14 is rotatably mounted on the bottom of the mounting bracket 16 and is driven by the second motor 15; During implementation, since the second electric actuator 48 is a multi-stage telescopic rod, the extension length of the second electric actuator 48 can be controlled to different lengths during the gas collection process using the collection tube 4. When the second electric actuator 48 extends to different lengths, the entire collection tube 4 can be moved up or down by the drive plate 46, thereby adjusting the position of the collection tube 4 in the height direction. This allows for the collection and detection of gas at different heights in the mine tunnel, enabling a more comprehensive detection of the gas in the mine tunnel. Specifically, since the lower half-cylinder 33 has different length specifications, when it is necessary to adjust the overall length of the vertical cylinder 3, the lower half-cylinder 33 is removed from the upper half-cylinder 32, and a lower half-cylinder 33 of different length specifications is replaced. The lower half-cylinder 33 and the upper half-cylinder 32 are fixed with bolts, so that the overall length of the vertical cylinder 3 can be adjusted. If the overall length of the vertical cylinder 3 is increased, the second electric push rod 48 can be used to indirectly push the collection cylinder 4 down a longer distance, thereby further increasing the detection range of gas in the mine tunnel. By controlling the rotation of the second motor 15, the rotating second motor 15 will drive the rotating plate 14 to rotate, and the rotating plate 14 will drive the gas chamber 12, the detector body 1, the vertical cylinder 3 and the collection cylinder 4 to rotate as a whole, thereby adjusting the position of the vertical cylinder 3. After the position of the vertical cylinder 3 is adjusted, the gas can continue to be collected and then detected, thereby further improving the detection range of the gas in the mine passage.

[0026] As one embodiment of the present invention; the side of the rectangular block 2 facing the control valve 131 is cylindrical; A rectangular frame 22 slides on the cylindrical shape of the rectangular block 2, and the inner circle of the rectangular frame 22 is circular; the rectangular frame 22 is connected to the rectangular block 2 by a spring. The rectangular frame 22 is initially positioned above the air inlet slot 53; an air inlet 23 is provided at the bottom of the rectangular frame 22, and the air inlet 23 corresponds to the air inlet slot 53; a second filter screen 24 is installed on the side of the rectangular block 2 near the detection head 11; In this embodiment, a groove is provided on the top end face of the rectangular frame 22, and a wiping layer 25 is fixedly connected in the groove; In this embodiment, the sealing plate 13 is fixed to both sides of the air chamber 12 by bolts; During implementation, since the rectangular frame 22 slides on the cylindrical shape of the rectangular block 2 by the spring, and the air port 23 at the bottom of the rectangular frame 22 corresponds to the air inlet groove 53, when the gas in the air inlet groove 53 flows out, it will enter the rectangular frame 22 through the air port 23, and then flow out through the second filter screen 24. Thus, the second filter screen 24 can be used to filter the gas entering the air chamber 12 again, further ensuring the cleanliness of the gas entering the air chamber 12. When the gas passes through the second filter screen 24, the detection head 11 detects the gas. Specifically, after the test is completed, the first electric actuator 21 pushes the rectangular block 2 to move to the left. The rectangular block 2 then pushes the rectangular frame 22 to move. As the rectangular block 2 moves gradually, the gas can gradually flow out from the control valve 131. When the rectangular frame 22 is in contact with the left sealing plate 13, the rectangular frame 22 will slide along the cylinder on the rectangular block 2 due to the obstruction of the sealing plate 13. At this time, the gas between the second filter screen 24 and the cylinder will be gradually squeezed out. When the second filter screen 24 is in contact with the cylinder on the rectangular frame 22, the gas between the second filter screen 24 and the cylinder will be completely squeezed out, thereby avoiding the gas from the previous test remaining in the gas chamber 12. When the rectangular frame 22 passes the detection head 11, the wiping layer 25 in the groove at the top of the rectangular frame 22 will wipe the detection head 11 to prevent dust from being present on the detection head 11 and affecting the detection of gas. More specifically, since the sealing plate 13 is fixed to both sides of the air chamber 12 by bolts, when it is necessary to clean the inside of the air chamber 12 or replace the second filter 24, the bolts can be removed with a wrench, and then the sealing plate 13 can be turned downwards. Then the rectangular block 2, the rectangular frame 22 and the second filter 24 can be taken out, and then the air chamber 12 can be cleaned or the second filter 24 can be replaced. After the air chamber 12 is cleaned or the second filter 24 is replaced, the above operation can be repeated in reverse.

[0027] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole portable carbon monoxide concentration detection device, comprising a detector body (1); a detection head (11) is installed at the bottom of the detector body (1); an infrared light source detection module is arranged in the detection head (11); a gas chamber (12) is installed at the bottom of the detector body (1); characterized in that: The bottom of the gas chamber (12) is equipped with an acquisition component; the acquisition component includes a vertical cylinder (3); the vertical cylinder (3) is provided with a first gas groove (31); a collection cylinder (4) slides inside the vertical cylinder (3); a sealing plate (41) is fixedly installed at the top and bottom of the collection cylinder (4); a second gas groove (42) is provided on the collection cylinder (4), and in the initial state, the second gas groove (42) corresponds to the first gas groove (31); a sliding plate (43) slides inside the collection cylinder (4); an arc-shaped block (44) is fixedly installed on the side of the sliding plate (43) facing the second gas groove (42), and the arc-shaped block (44) slides inside the second gas groove (42); a sealing plate (41) is fixed at the bottom of the collection cylinder (4). A drive rod (45) is installed; a drive plate (46) rotates at the bottom of the drive rod (45), and the drive plate (46) slides in the first air groove (31); a first motor (47) is installed at the bottom of the drive plate (46); a second electric push rod (48) is installed on both sides of the air chamber (12), and the extension rods of the two second electric push rods (48) are fixed on both sides of the drive plate (46); a third electric push rod (49) is installed on the sealing plate (41) at the bottom of the collection cylinder (4), and the extension rod of the third electric push rod (49) is fixed on the bottom of the sliding plate (43); the third electric push rod (49) is located above the drive plate (46); an air intake assembly is provided on the sealing plate (41) at the top of the collection cylinder (4).

2. The portable downhole carbon monoxide concentration detection device according to claim 1, characterized in that: The gas chamber (12) is rectangular, and sealing plates (13) are fixedly installed on both sides of the gas chamber (12); the gas chamber (12) is installed on the top of the mine through a mounting frame (16); a rectangular block (2) slides inside the gas chamber (12); a first electric actuator (21) is fixedly installed on the right side of the gas chamber (12), and the extension rod of the first electric actuator (21) is fixed on the rectangular block (2); the detection head (11) extends into the gas chamber (12) and is located on the left side of the rectangular block (2); a control valve (131) is installed in the sealing plate (13) on the left side of the gas chamber (12); the sealing plate (41) at the top of the collection cylinder (4) is arc-shaped; the air intake assembly includes an air intake cylinder (5); the sealing plate (41) at the top of the sealing plate (41) is mounted on the top of the sealing plate (41). An air inlet cylinder (5) is installed, and the top of the air inlet cylinder (5) is closed; an air outlet groove (51) is opened on the air inlet cylinder (5), and the air outlet groove (51) is initially opposite to the first air groove (31); an arc groove is opened at the bottom of the air chamber (12), and the arc groove is opposite to the sealing plate (41) at the top of the collection cylinder (4); a circular groove (52) is opened in the arc groove; an air inlet groove (53) is opened on the left side of the circular groove (52), and the air inlet groove (53) extends to the upper left and extends to the left side of the rectangular block (2); a sealing block (54) is slidably connected in the circular groove (52) by a spring, and the sealing block (54) is initially flush with the bottom surface of the air chamber (12) and blocks the air inlet groove (53).

3. The portable downhole carbon monoxide concentration detection device according to claim 2, characterized in that: The bottom of the air inlet cylinder (5) is fixedly connected to the bottom surface of the sealing plate (41) with an annular plate (6); the inner ring of the annular plate (6) is threaded; the inner ring of the annular plate (6) is threaded with an annular cylinder (61), and a first filter screen (62) is installed at the bottom of the annular cylinder (61); the top of the sealing plate (41) located above the collection cylinder (4) is provided with countersunk holes (63) evenly arranged, and countersunk bolts are provided in the countersunk holes (63), and the other side of the countersunk bolts is engaged with the top of the collection cylinder (4).

4. The portable downhole carbon monoxide concentration detection device according to claim 3, characterized in that: A support plate (64) is provided below the first filter screen (62), and the support plate (64) is fixedly installed in the inner ring of the collection tube (4); a through hole is provided in the middle of the slide plate (43); a rotating rod (65) is rotatably provided inside the support plate (64), the top of the rotating rod (65) extends above the support plate (64), and the bottom of the rotating rod (65) extends through the through hole to the bottom of the slide plate (43); a spiral groove (66) is provided on the outer ring surface of the rotating rod (65); a sliding shaft (67) is fixedly connected in the through hole, and the sliding shaft (67) slides in the spiral groove (66); a brush layer (68) is provided at the top of the rotating rod (65), and the brush layer (68) is in contact with the surface of the first filter screen (62).

5. The portable downhole carbon monoxide concentration detection device according to claim 4, characterized in that: A rubber block (69) is installed on the top of the support plate (64), and the rubber block (69) intersects with the brush layer (68).

6. The portable downhole carbon monoxide concentration detection device according to claim 5, characterized in that: The vertical cylinder (3) includes an upper cylinder (32) and a lower cylinder (33); the upper cylinder (32) is fixedly installed at the bottom of the air chamber (12) by bolts; the upper cylinder (32) and the lower cylinder (33) are fixedly connected by bolts; the first air grooves (31) on the upper cylinder (32) and the lower cylinder (33) correspond to each other and are interconnected; the lower cylinder (33) has different length specifications; the second electric actuator (48) is a multi-stage telescopic rod.

7. The portable downhole carbon monoxide concentration detection device according to claim 6, characterized in that: The air chamber (12) is equipped with rotating plates (14) on both sides; the rotating plates (14) are rotatably mounted on the bottom of the mounting frame (16) and driven by the second motor (15).

8. The portable downhole carbon monoxide concentration detection device according to claim 7, characterized in that: The rectangular block (2) is cylindrical on the side facing the control valve (131); a rectangular frame (22) slides on the cylindrical part of the rectangular block (2), and the inner circle of the rectangular frame (22) is circular; the rectangular frame (22) is connected to the rectangular block (2) by a spring; the rectangular frame (22) is initially located above the air inlet groove (53); an air port (23) is opened at the bottom of the rectangular frame (22), and the air port (23) corresponds to the air inlet groove (53); a second filter screen (24) is installed on the side of the rectangular block (2) near the detection head (11).

9. The portable downhole carbon monoxide concentration detection device according to claim 8, characterized in that: The top end face of the rectangular frame (22) has a groove, and a wiping layer (25) is fixedly connected in the groove.

10. The portable downhole carbon monoxide concentration detection device according to claim 9, characterized in that: The sealing plate (13) is fixed to both sides of the air chamber (12) by bolts.

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