A gas leak detection system

Abstract

The present invention relates to the technical field of gas leak detection, and specifically to a gas leak detection system. It comprises a shell, an inner cylinder is fixedly installed at the axial position of the shell, the inner side of the inner cylinder is connected to a DC ventilation member, the bottom of the shell is connected to an air inlet pipe that cooperates with the DC ventilation member, and the peripheral side of the inner cylinder is rotatably connected to a rotating cylinder driven by a first indexing motor. The beneficial effects of the present invention are: through the synchronous occurrence of the vibration and rotation state of the gas sensor, on the one hand, it can effectively improve the detection range and sampling uniformity per unit time during the gas sensor detection, and then effectively improve the detection accuracy, and on the other hand, it can realize the reciprocating cleaning of the gas sensor and the self-dust shaking of the gas sensor through the soft brush ring.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage detection, in particular to a gas leakage detection system. Background Art

[0002] At present, the application field of combustible gas is rapidly expanding. While it brings great convenience to people's production and life, due to its flammable and explosive characteristics, when the combustible gas leaks into the air and reaches a certain concentration range, it is very easy to explode, posing a great threat to people's life and property safety. Therefore, in the process of using gas, it is necessary to use a gas leak detection system to detect the gas leak. In the prior art, a patent document with publication number CN111679037A discloses a gas leak detection device, including a shell, an air inlet nozzle is provided at the top of the shell, a hollow connecting pipe is fixedly connected to the upper end of the air inlet nozzle, an extension pipe is movably sleeved on the hollow connecting pipe, and an inner portion of the hollow connecting pipe or the air inlet nozzle is provided with a gas inlet nozzle. A gas detection sensor is installed, and a controller is arranged in the shell. The gas detection sensor is electrically connected to the controller. The above device is detachably connected to the outside of the hollow connecting tube by a threaded connection, so as to facilitate the replacement of the corresponding extension tube. At the same time, the air inlet end is correspondingly extended to increase the test range. However, when the above detection device is used for gas leak detection, on the one hand, it cannot effectively improve the cleanliness and detection accuracy of the gas sensor detection port. On the other hand, gas sample residue and gas sample delay are prone to occur during detection, and then the detection sensitivity of the detection device cannot be effectively improved. Based on this, the present invention provides a gas leak detection system to solve the problems raised in the above background technology. Summary of the invention

[0003] The present invention aims at the technical problems existing in the prior art and provides a gas leak detection system to solve the problems that, when the existing detection device performs gas leak detection, on the one hand, it cannot effectively improve the cleanliness and detection accuracy of the gas sensor detection port, and on the other hand, it is easy to cause gas sample residue and gas sample delay during detection.

[0004] The technical solution of the present invention for solving the above-mentioned technical problems is as follows: a gas leak detection system comprises a shell, an inner cylinder is fixedly installed at the axial position of the shell, the inner side of the inner cylinder is connected to a DC ventilation member, the bottom of the shell is connected to an air inlet pipe matched with the DC ventilation member, the circumferential side surface of the inner cylinder is rotatably connected to a rotating cylinder driven by a first indexing motor, a group of sampling modules distributed in a circumferential array and a group of negative pressure suction nozzles distributed in a circumferential array are fixedly installed on the circumferential side surface of the rotating cylinder, a negative pressure exhaust member connected to the negative pressure suction nozzle is installed on the back of the shell, a transmission bevel gear ring is rotatably connected between the relative surfaces of the shell and the inner cylinder, a group of the sampling modules are all driven by the transmission bevel gear ring, the top of the shell is connected to an inspection tube, a detection component connected to the transmission bevel gear ring is installed inside the inspection tube, an exhaust pipe and a time-sharing sample storage component are respectively installed on the circumferential side surface of the shell, and a one-way exhaust valve is fixedly installed inside the exhaust pipe.

[0005] The beneficial effects of the present invention are:

[0006] 1) In the present invention, when the gas detection operation is in progress, the motor continuously outputs a rotation speed. After the motor outputs the rotation speed, on the one hand, it drives the vibration frame to vibrate back and forth within the set stroke, and on the other hand, it drives the cleaning cylinder and the gas sensor to rotate. The reciprocating vibration of the vibration frame drives the gas sensor to vibrate up and down during the rotation. Through the synchronous occurrence of the vibration and rotation states of the gas sensor, on the one hand, it can effectively improve the detection range and sampling uniformity per unit time during the gas sensor detection, thereby effectively improving the detection accuracy. On the other hand, the reciprocating cleaning of the gas sensor and the self-shaking of the gas sensor can be achieved through the soft brush ring. Through the realization of the above-mentioned technical effects, the cleanliness and detection accuracy of the gas sensor detection port are effectively guaranteed.

[0007] 2) The present invention arranges the sampling module and the negative pressure suction nozzle at intervals on the circumferential side of the rotating drum, thereby realizing the periodic sample delivery of the sampling module to the test tube, and after the test, the negative pressure generated in the negative pressure suction nozzle is used to periodically draw out the residual gas sample in the test tube. By achieving the above technical effects, the gas sample residue and gas sample delay phenomena are effectively avoided, thereby effectively improving the detection sensitivity and detection accuracy of the device.

[0008] 3) When the present invention performs gas detection operations, the sampling tube rotates at a set speed under the transmission action of the transmission bevel gear ring. The rotation state setting of the sampling tube and the setting of the scraper strip effectively reduce the adhesion rate of impurities in the detected gas sample on the inner wall of the sampling tube, thereby effectively ensuring the cleanliness of the inner wall of the sampling tube.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the DC ventilation component includes a right-angle bend pipe arranged on the inner wall of the inner cylinder, and the two ends of the right-angle bend pipe are respectively provided with an air inlet end arranged vertically downward and an air outlet end arranged horizontally, the ports of the air inlet end and the air outlet end are fixedly connected to the inner cylinder, the axis of the air inlet end and the axis of the air inlet pipe are in the same straight line, and a induced draft fan is fixedly installed inside the right-angle bend pipe.

[0011] Furthermore, the negative pressure exhaust component respectively includes a negative pressure seat fixed to the back of the shell and a negative pressure cavity opened inside the rotating drum. The tail end of each negative pressure suction nozzle is fixedly connected to the negative pressure cavity. A cavity is fixedly opened inside the negative pressure seat. The peripheral side surface of the cavity is rotatably connected to the negative pressure cavity. An exhaust pipe connected to the cavity is fixedly installed on the back of the negative pressure seat, and a first axial flow exhaust fan is fixedly installed on the inner wall of the exhaust pipe.

[0012] Furthermore, a group of the sampling modules and a group of the negative pressure nozzles are arranged in pairs on the peripheral side of the rotating drum, the air outlet axis of the air outlet end faces the exhaust pipe, and a filter element is installed at the port of the air inlet pipe.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that by arranging the sampling module and the negative pressure suction nozzle at intervals on the circumferential side of the rotating drum, the sampling module can periodically deliver samples to the test tube, and after the test, the negative pressure generated in the negative pressure suction nozzle can periodically lead the residual gas sample in the test tube outward, thereby effectively improving the detection accuracy of the detection device.

[0014] Furthermore, the sampling module includes an inner tube and a front tube respectively, the tail end of the inner tube is fixedly connected to the inner tube, the peripheral side surface of the front tube is fixedly connected to the inner tube, the end surface of the front tube is slidingly fitted with the inner tube, a sampling tube is rotationally connected between the relative surfaces of the inner tube and the front tube, a driven bevel gear meshing with a transmission bevel gear ring is fixedly installed on the peripheral side surface of the sampling tube, and two scraping strips symmetrically arranged and fitted with the sampling tube are fixedly installed on the inner wall of the front tube.

[0015] The beneficial effect of adopting the above further scheme is that during the detection operation, the sampling tube rotates at a set speed under the transmission action of the transmission bevel gear ring. By setting the rotation state of the sampling tube and the scraper strip, the adhesion rate of impurities in the detected gas sample on the inner wall of the sampling tube is effectively reduced, thereby effectively ensuring the cleanliness of the inner wall of the sampling tube.

[0016] Furthermore, the detection component includes a vibration transmission component installed on the upper part of the shell, the ports of the vibration transmission component are respectively connected to the vibration frame and the movable rotating shaft, the peripheral side surface of the movable rotating shaft is rotatably connected to the vibration frame, the inner wall of the inspection tube is rotatably connected to a cleaning brush cylinder driven by the vibration transmission component, a soft brush ring is fixedly installed on the inner wall of the cleaning brush cylinder, the peripheral side surface of the vibration frame is slidably connected to the inspection tube, a gas sensor is fixedly installed at the axial position of the movable rotating shaft, a single-chip microcomputer is fixedly installed on the end face of the shell, and a sound and light alarm is fixedly installed on the top of the shell, and the data ends of the gas sensor and the sound and light alarm are electrically connected to the single-chip microcomputer through data wires.

[0017] Furthermore, the vibration transmission assembly includes a motor fixed to the top of the shell, a first guide shaft, a second guide shaft and a third guide shaft rotatably connected to the inner wall of the shell, the output shaft end of the motor is respectively connected to the first guide shaft and the second guide shaft through a first chain, the inner wall of the shell is rotatably connected to a fixed rotating shaft coaxially arranged with the movable rotating shaft, the peripheral side surface of the fixed rotating shaft is connected to the movable rotating shaft in a transmission manner and slidably matched, the top end of the fixed rotating shaft and the front end of the first guide shaft are fixedly installed with a first linkage bevel gear, the two first linkage bevel gears are meshed with each other, the peripheral side surface of the cleaning cylinder and the first The front ends of the two guide shafts are fixedly installed with second linkage bevel teeth, and the two second linkage bevel teeth are meshed with each other. A vertically arranged guide vibration tooth plate is fixedly installed on the top surface of the vibration frame, and a semi-transmission gear transmission-connected to the guide vibration tooth plate is fixedly installed on the peripheral side surface of the second guide shaft. A return spring is installed between the relative surfaces of the vibration frame and the inspection tube, and a third linkage bevel tooth is fixedly installed on the tail end of the third guide shaft. The bevel tooth surface of the third linkage bevel tooth is transmission-connected to the second linkage bevel tooth on the peripheral side surface of the cleaning cylinder, and the peripheral side surface of the third guide shaft is transmission-connected to the transmission bevel gear ring through a second chain.

[0018] The beneficial effect of adopting the above-mentioned further scheme is that when the gas detection operation is in progress, the motor continuously outputs the speed. After the motor outputs the speed, on the one hand, it drives the vibration frame to vibrate back and forth within the set stroke, and on the other hand, it drives the cleaning cylinder and the gas sensor to rotate. The reciprocating vibration of the vibration frame drives the gas sensor to vibrate up and down during the rotation process. Through the synchronous occurrence of the vibration and rotation state of the gas sensor, on the one hand, it can effectively improve the detection range and sampling uniformity per unit time during gas sensor detection, and then effectively improve the detection accuracy. On the other hand, the soft brush ring can realize the reciprocating cleaning of the gas sensor and the self-dust shaking of the gas sensor. Through the realization of the above-mentioned technical effects, the cleanliness and detection accuracy of the gas sensor detection port are effectively guaranteed.

[0019] Furthermore, a sliding guide groove with a top opening fixedly opened inside the movable rotating shaft and slidably connected to the fixed rotating shaft, the inner cavity shape of the sliding guide groove and the cross section of the fixed rotating shaft are both regular polygons.

[0020] Furthermore, the time-sharing sample storage component includes an air duct fixedly connected to the shell, a one-way air outlet valve is fixedly arranged at the connection point between the air duct and the shell, a partition is fixedly installed on the inner wall of the air duct, and the interior of the air duct is separated by the partition to respectively open a sample injection chamber and a sample discharge chamber isolated from each other, the interior of the air duct is provided with two symmetrically arranged through holes, the tail ends of the two through holes are respectively fixedly connected to the sample injection chamber and the sample discharge chamber, the inner walls of the sample injection chamber and the sample discharge chamber are both fixedly installed with a second axial flow exhaust fan, the peripheral side surface of the air duct is rotatably connected to a rotor driven by a second indexing motor, the peripheral side surface of the rotor is fixedly connected to a group of ventilation joints distributed in a circular array, each of the ventilation joints is installed with a solenoid valve, and the port of each ventilation joint is threadedly connected to a sample storage cylinder.

[0021] The beneficial effect of adopting the above further solution is that, by setting the time-sharing sample storage component, the gas samples stored in the sampling module can be stored in a time-sharing manner in a specified period of time;

[0022] By achieving the time-sharing storage effect, on the one hand, the changes in gas concentration in different time periods can be effectively monitored, and on the other hand, the gas detection accuracy of the gas sensor can be quickly rechecked and re-inspected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a gas leak detection system of the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the structure from another perspective;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0026] Figure 4 For the present invention Figure 1 A schematic cross-sectional structure diagram of ;

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0028] Figure 6 For the present invention Figure 4 A schematic diagram of the local enlarged structure at C in the middle;

[0029] Figure 7 For the present invention Figure 4 A schematic diagram of the local enlarged structure at D in the middle;

[0030] Figure 8 It is a schematic diagram of the cross-sectional structure of the sample storage tube and the through hole of the present invention;

[0031] Fig. 9 It is a schematic structural diagram of the transmission bevel gear ring of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Shell; 2. Inner tube; 3. Air inlet pipe; 4. First indexing motor; 5. Rotating drum; 6. Negative pressure nozzle; 7. Transmission bevel gear ring; 8. Inspection tube; 9. Exhaust duct; 10. Right-angle elbow; 11. Drainage fan; 12. Negative pressure seat; 13. Negative pressure chamber; 14. Exhaust tube; 15. Inner duct; 16. Front duct; 17. Sampling tube; 18. Driven bevel gear; 19. Scraper; 20. Vibration frame; 21. Moving rotating shaft; 22. Cleaning brush tube; 23. Soft Brush ring; 24. Gas sensor; 25. Single chip microcomputer; 26. Sound and light alarm; 27. Motor; 28. First guide shaft; 29. ​​Second guide shaft; 30. Fixed rotary shaft; 31. Vibration guide gear plate; 32. Semi-transmission gear; 33. Return spring; 34. Air duct; 35. Partition; 36. Sample inlet chamber; 37. Sample discharge chamber; 38. Through hole; 39. Sample storage cylinder; 40. Second indexing motor; 41. Rotary cylinder; 42. Ventilation joint; 43. Third guide shaft. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] The present invention provides the following preferred embodiments

[0036] like Figure 1-9 As shown, a gas leak detection system comprises a shell 1, an inner cylinder 2 is fixedly installed at the axial position of the shell 1, the inner side of the inner cylinder 2 is connected to a DC ventilation member, and the bottom of the shell 1 is connected to an air inlet pipe 3 matched with the DC ventilation member;

[0037] The DC ventilation member includes a right-angle elbow 10 arranged on the inner wall of the inner tube 2, and the two ends of the right-angle elbow 10 are respectively provided with an air inlet end arranged vertically downward and an air outlet end arranged horizontally, and the ports of the air inlet end and the air outlet end are both fixedly connected to the inner tube 2, and the axis of the air inlet end is in the same straight line as the axis of the air inlet pipe 3, and a drainage fan 11 is fixedly installed inside the right-angle elbow 10;

[0038] The circumferential side surface of the inner cylinder 2 is rotatably connected to a rotating cylinder 5 driven by a first indexing motor 4, and a group of sampling modules distributed in a circumferential array and a group of negative pressure suction nozzles 6 distributed in a circumferential array are fixedly installed on the circumferential side surface of the rotating cylinder 5;

[0039] A negative pressure exhaust member connected to the negative pressure suction nozzle 6 is installed on the back of the housing 1;

[0040] A group of sampling modules and a group of negative pressure suction nozzles 6 are arranged in pairs on the peripheral side of the rotating drum 5, and the air outlet axis of the air outlet end faces the exhaust pipe 9. A filter element is installed at the port of the air inlet pipe 3.

[0041] By setting the sampling module and the negative pressure suction nozzle 6 at intervals on the side of the rotating drum 5, the sampling module can periodically deliver samples to the test tube 8, and after the test, the negative pressure generated in the negative pressure suction nozzle 6 can periodically lead the residual gas sample in the test tube 8 outward, thereby effectively improving the detection accuracy of the detection device;

[0042] The negative pressure exhaust parts respectively include a negative pressure seat 12 fixed to the back of the housing 1 and a negative pressure cavity 13 opened inside the rotating drum 5. The tail end of each negative pressure suction nozzle 6 is fixedly connected to the negative pressure cavity 13. A cavity is fixedly opened inside the negative pressure seat 12. The circumferential side of the cavity is rotatably connected to the negative pressure cavity 13. An exhaust cylinder 14 connected to the cavity is fixedly installed on the back of the negative pressure seat 12. The inner wall of the exhaust cylinder 14 is fixedly installed with a first axial flow exhaust fan.

[0043] A transmission bevel gear ring 7 is rotatably connected between the relative surfaces of the shell 1 and the inner cylinder 2, and a group of sampling modules are driven by the transmission bevel gear ring 7;

[0044] The top of the shell 1 is connected to an inspection tube 8, and a detection component connected to the transmission bevel gear ring 7 is installed inside the inspection tube 8. An exhaust pipe 9 and a time-sharing sample storage component are installed on the surrounding side of the shell 1. A one-way exhaust valve is fixedly installed inside the exhaust pipe 9.

[0045] The inner wall of the inspection tube 8 is rotatably connected with a cleaning brush cylinder 22 driven by a vibration transmission component, a soft brush ring 23 is fixedly installed on the inner wall of the cleaning brush cylinder 22, the peripheral side surface of the vibration frame 20 is slidably connected with the inspection tube 8, a gas sensor 24 is fixedly installed at the axis position of the movable rotating shaft 21, a single-chip microcomputer 25 is fixedly installed on the end surface of the shell 1, and an audible and visual alarm 26 is fixedly installed on the top of the shell 1, and the data ends of the gas sensor 24 and the audible and visual alarm 26 are electrically connected to the single-chip microcomputer 25 through data wires;

[0046] The sampling module includes an inner tube 15 and a front tube 16 respectively. The tail end of the inner tube 15 is fixedly connected to the inner tube 2, the peripheral side surface of the front tube 16 is fixedly connected to the inner tube 2, the end surface of the front tube 16 is slidingly fitted with the inner tube 2, and a sampling tube 17 is rotationally connected between the relative surfaces of the inner tube 15 and the front tube 16. A driven bevel gear 18 meshing with the transmission bevel gear ring 7 is fixedly installed on the peripheral side surface of the sampling tube 17, and two scraping strips 19 symmetrically arranged and fitted with the sampling tube 17 are fixedly installed on the inner wall of the front tube 16.

[0047] During the detection operation, the sampling tube 17 rotates at a set speed under the transmission action of the transmission bevel gear ring 7. Through the setting of the rotation state of the sampling tube 17 and the setting of the scraper 19, the adhesion rate of impurities in the detected gas sample on the inner wall of the sampling tube 17 is effectively reduced, thereby effectively ensuring the cleanliness of the inner wall of the sampling tube 17.

[0048] The detection component includes a vibration transmission component installed on the upper part of the housing 1, and the ports of the vibration transmission component are respectively connected to the vibration frame 20 and the movable rotating shaft 21, and the peripheral side surface of the movable rotating shaft 21 is rotatably connected to the vibration frame 20;

[0049] The vibration transmission assembly includes a motor 27 fixed to the top of the housing 1, a first guide shaft 28, a second guide shaft 29 and a third guide shaft 43 rotatably connected to the inner wall of the housing 1, the output shaft end of the motor 27 is respectively connected to the first guide shaft 28 and the second guide shaft 29 through a first chain, the inner wall of the housing 1 is rotatably connected to a fixed rotating shaft 30 coaxially arranged with the movable rotating shaft 21, the peripheral side surface of the fixed rotating shaft 30 is connected to the movable rotating shaft 21 and is slidably matched, the top end of the fixed rotating shaft 30 and the front end of the first guide shaft 28 are fixedly installed with first linkage bevel gears, the two first linkage bevel gears are meshed with each other, and the peripheral side surface of the cleaning cylinder 22 and The front end of the second guide shaft 29 is fixedly installed with a second linkage bevel gear, and the two second linkage bevel gears are meshed with each other. A vertically arranged guide vibration tooth plate 31 is fixedly installed on the top surface of the vibration frame 20, and a semi-transmission gear 32 that is transmission-connected to the guide vibration tooth plate 31 is fixedly installed on the peripheral side surface of the second guide shaft 29. A return spring 33 is installed between the relative surfaces of the vibration frame 20 and the inspection tube 8. The tail end of the third guide shaft 43 is fixedly installed with a third linkage bevel gear, and the bevel tooth surface of the third linkage bevel gear is transmission-connected to the second linkage bevel gear on the peripheral side surface of the cleaning cylinder 22, and the peripheral side surface of the third guide shaft 43 is transmission-connected to the transmission bevel gear ring 4 through a second chain.

[0050] When the gas detection operation is in progress, the motor 27 continuously outputs a rotation speed. After the motor 27 outputs a rotation speed, on the one hand, it drives the vibration frame 20 to vibrate back and forth within the set stroke, and on the other hand, it drives the cleaning cylinder 22 and the gas sensor 24 to rotate. The reciprocating vibration of the vibration frame 20 drives the gas sensor 24 to vibrate up and down during the rotation. Through the synchronous occurrence of the vibration and rotation states of the gas sensor 24, on the one hand, it can effectively improve the detection range and sampling uniformity per unit time during the detection of the gas sensor 24, and then effectively improve the detection accuracy. On the other hand, the reciprocating cleaning of the gas sensor 24 and the self-dust shaking of the gas sensor 24 can be achieved through the soft brush ring 23. Through the realization of the above-mentioned technical effects, the cleanliness and detection accuracy of the detection port of the gas sensor 24 are effectively guaranteed.

[0051] A sliding guide groove with an opening at the top and slidably connected to the fixed rotating shaft 30 is fixedly provided inside the movable rotating shaft 21 . The inner cavity shape of the sliding guide groove and the cross section of the fixed rotating shaft 30 are both regular polygons.

[0052] The time-sharing sample storage component includes an air duct 34 fixedly connected to the shell 1, a one-way air outlet valve is fixedly arranged at the connection point between the air duct 34 and the shell 1, a partition 35 is fixedly installed on the inner wall of the air duct 34, and the interior of the air duct 34 is separated by the partition 35 to respectively open a sample injection chamber 36 and a sample discharge chamber 37 isolated from each other, the interior of the air duct 34 is provided with two symmetrically arranged through holes 38, the tail ends of the two through holes 38 are respectively fixedly connected to the sample injection chamber 36 and the sample discharge chamber 37, and the inner walls of the sample injection chamber 36 and the sample discharge chamber 37 are fixedly installed with a second axial flow exhaust fan, the peripheral side surface of the air duct 34 is rotatably connected to a rotary drum 41 driven by a second indexing motor 40, and the peripheral side surface of the rotary drum 41 is fixedly connected to a group of ventilation joints 42 distributed in a circumferential array, each ventilation joint 42 is installed with a solenoid valve, and the port of each ventilation joint 42 is threadedly connected to a sample storage cylinder 39.

[0053] By setting the time-sharing sample storage component, the gas samples stored in the sampling module can be stored in a time-sharing manner in a specified period of time;

[0054] By achieving the time-sharing storage effect, on the one hand, the changes in gas concentration in different time periods can be effectively monitored, and on the other hand, the gas detection accuracy of the gas sensor 24 can be quickly rechecked and re-inspected.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas leak detection system, comprising a housing (1), characterized in that: An inner cylinder (2) is fixedly mounted at the axis position of the shell (1), the inner side of the inner cylinder (2) is connected to a DC ventilation member, the bottom of the shell (1) is connected to an air inlet pipe (3) that cooperates with the DC ventilation member, the circumferential side surface of the inner cylinder (2) is rotatably connected to a rotating cylinder (5) driven by a first indexing motor (4), and a group of sampling modules distributed in a circumferential array and a group of negative pressure suction nozzles (6) distributed in a circumferential array are respectively fixedly mounted on the circumferential side surface of the rotating cylinder (5); A negative pressure exhaust member connected to the negative pressure suction nozzle (6) is installed on the back of the shell (1); a transmission bevel gear ring (7) is rotatably connected between the opposing surfaces of the shell (1) and the inner cylinder (2); and a group of the sampling modules are driven by the transmission bevel gear ring (7); The top of the housing (1) is connected to a detection tube (8), and a detection component connected to the transmission bevel gear ring (7) is installed inside the detection tube (8); An exhaust pipe (9) and a time-sharing sample storage component are respectively installed on the peripheral side surfaces of the housing (1), and a one-way exhaust valve is fixedly installed inside the exhaust pipe (9); The DC ventilation member comprises a right-angled bend pipe (10) arranged on the inner wall of the inner cylinder (2), the two ends of the right-angled bend pipe (10) are respectively provided with an air inlet end arranged vertically downward and an air outlet end arranged horizontally, the ports of the air inlet end and the air outlet end are both fixedly connected to the inner cylinder (2), the axis of the air inlet end is in the same straight line as the axis of the air inlet pipe (3), and a drainage fan (11) is fixedly installed inside the right-angled bend pipe (10); The negative pressure exhaust component comprises a negative pressure seat (12) fixed to the back of the shell (1) and a negative pressure chamber (13) opened inside the rotating drum (5); the tail end of each negative pressure suction nozzle (6) is fixedly connected to the negative pressure chamber (13); a cavity is fixedly opened inside the negative pressure seat (12); the peripheral side surface of the cavity is rotatably connected to the negative pressure chamber (13); an exhaust cylinder (14) connected to the cavity is fixedly installed on the back of the negative pressure seat (12); and a first axial flow exhaust fan is fixedly installed on the inner wall of the exhaust cylinder (14); A group of the sampling modules and a group of the negative pressure nozzles (6) are arranged at intervals of two on the peripheral side of the rotating drum (5), the air outlet axis of the air outlet end faces the exhaust pipe (9), and a filter element is installed at the port of the air inlet pipe (3); The detection component comprises a vibration transmission component mounted on the upper part of the housing (1); the ports of the vibration transmission component are respectively connected to a vibration frame (20) and a movable rotating shaft (21); the peripheral side surface of the movable rotating shaft (21) is rotationally connected to the vibration frame (20); the inner wall of the inspection tube (8) is rotationally connected to a cleaning brush cylinder (22) driven by the vibration transmission component; a soft brush ring (23) is fixedly mounted on the inner wall of the cleaning brush cylinder (22); the peripheral side surface of the vibration frame (20) is slidably connected to the inspection tube (8); a gas sensor (24) is fixedly mounted on the axis position of the movable rotating shaft (21); a single-chip microcomputer (25) is fixedly mounted on the end surface of the housing (1); and a sound and light alarm (26) is fixedly mounted on the top of the housing (1); and data ends of the gas sensor (24) and the sound and light alarm (26) are both electrically connected to the single-chip microcomputer (25) via data wires; The vibration transmission assembly comprises a motor (27) fixed to the top of the housing (1), a first guide shaft (28), a second guide shaft (29) and a third guide shaft (43) rotatably connected to the inner wall of the housing (1); the output shaft end of the motor (27) is respectively connected to the first guide shaft (28) and the second guide shaft (29) via a first chain; the inner wall of the housing (1) is connected to a fixed rotating shaft (30) coaxially arranged with the movable rotating shaft (21); the peripheral side surface of the fixed rotating shaft (30) is connected to the movable rotating shaft (21) in a slidable manner; the top end of the fixed rotating shaft (30) and the front end of the first guide shaft (28) are both fixedly mounted with first linkage bevel teeth, and the two first linkage bevel teeth are meshed with each other; the peripheral side surface of the cleaning cylinder (22) and the front end of the second guide shaft (29) are both fixedly mounted with second linkage bevel teeth, and the two second linkage bevel teeth are meshed with each other.

2. A gas leak detection system according to claim 1, characterized in that: The sampling module comprises an inner conduit (15) and a front conduit (16), the rear end of the inner conduit (15) being fixedly connected to the inner cylinder (2), the peripheral side surface of the front conduit (16) being fixedly connected to the inner cylinder (2), the end surface of the front conduit (16) being slidingly fitted to the inner cylinder (2), a sampling cylinder (17) being rotationally connected between the opposing surfaces of the inner conduit (15) and the front conduit (16), a driven bevel gear (18) meshing with a transmission bevel gear ring (7) being fixedly mounted on the peripheral side surface of the sampling cylinder (17), and two scraping strips (19) symmetrically arranged and fitted to the sampling cylinder (17) being fixedly mounted on the inner wall of the front conduit (16).

3. A gas leak detection system according to claim 1, characterized in that: A vertically arranged vibration guide tooth plate (31) is fixedly mounted on the top surface of the vibration frame (20), and a semi-transmission gear (32) transmission-connected to the vibration guide tooth plate (31) is fixedly mounted on the peripheral side surface of the second guide shaft (29).

4. A gas leak detection system according to claim 3, characterized in that: A return spring (33) is installed between the opposing surfaces of the vibration frame (20) and the inspection tube (8); a third linkage bevel gear is fixedly installed at the tail end of the third guide shaft (43); the bevel gear surface of the third linkage bevel gear is transmission-connected to the second linkage bevel gear on the peripheral side surface of the cleaning cylinder (22); and the peripheral side surface of the third guide shaft (43) is transmission-connected to the transmission bevel gear ring (7) via a second chain.

5. A gas leak detection system according to claim 4, characterized in that: The movable rotating shaft (21) is fixedly provided with a sliding guide groove with a top opening and slidably connected to the fixed rotating shaft (30). The inner cavity shape of the sliding guide groove and the cross section of the fixed rotating shaft (30) are both regular polygons.

6. A gas leak detection system according to claim 1, characterized in that: The time-sharing sample storage component comprises an air duct (34) fixedly connected to the housing (1); a one-way air outlet valve is fixedly arranged at the connection point between the air duct (34) and the housing (1); a partition (35) is fixedly installed on the inner wall of the air duct (34); the interior of the air duct (34) is divided by the partition (35) to respectively define a sample inlet chamber (36) and a sample discharge chamber (37) which are isolated from each other; the interior of the air duct (34) is provided with two symmetrically arranged through holes (38); the tail ends of the two through holes (38) are respectively connected to the sample inlet chamber (36) and the sample discharge chamber (37); (36) and the sample discharge chamber (37) are fixedly connected, the inner walls of the sample inlet chamber (36) and the sample discharge chamber (37) are fixedly installed with a second axial flow exhaust fan, the peripheral side surface of the air duct (34) is rotatably connected to a rotary drum (41) driven by a second indexing motor (40), the peripheral side surface of the rotary drum (41) is fixedly connected to a group of ventilation joints (42) distributed in a circular array, each of the ventilation joints (42) is installed with a solenoid valve, and the port of each ventilation joint (42) is threadedly connected to a sample storage cylinder (39).

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