Laser gas detection device and method

Abstract

The invention discloses a laser gas detection device and method, and relates to the technical field of poisonous and harmful gas detection.The laser gas detection device comprises a supporting plate, a circular groove is formed in the center of the top face of the supporting plate, a disc is rotationally connected in the circular groove, strip-shaped plates are symmetrically and fixedly connected to the top face of the disc, a protection box is rotationally connected between the two strip-shaped plates, and a laser instrument is detachably connected in the protection box; an annular toothed plate is fixedly connected to the top face of the supporting plate and is in transmission connection with a control assembly, the control assembly is fixedly connected with the top face of the disc and is in transmission connection with a connecting shaft, the end of the connecting shaft penetrates through the strip-shaped plate and is fixedly connected with the protection box, driving boxes are symmetrically and fixedly connected into the protection box, a roller shaft is installed between the two driving boxes, and the outer side of the roller shaft is wrapped with wiping cloth. The wiping cloth is used for cleaning the end face of the laser instrument. According to the invention, multidirectional adjustment can be realized, gases in different directions can be detected, and whether the gases leak or not can be found in time; and the self-cleaning function is achieved, manual regular cleaning is not needed, time is saved, and working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of poisonous and harmful gas detection, and in particular to a laser gas detection device and method. Background Art

[0002] Laser gas remote sensing sensors are developed in recent years. They use tunable laser diode absorption spectroscopy analysis technology to detect characteristic gas leaks.

[0003] The existing technology can only detect target gas on the laser route in one direction, and the detection coverage is relatively small. In order to expand the detection range, the current common method is to fix multiple laser gas telemetry sensors, which is time-consuming, labor-intensive and costly. In addition, after long-term use, a layer of dust will adhere to the surface of the device, affecting the detection accuracy.

[0004] Therefore, there is an urgent need for a laser gas detection device and method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a laser gas detection device and method to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a laser gas detection device, comprising a support plate, a circular groove is opened at the center of the top surface of the support plate, a circular disc is rotatably connected in the circular groove, a strip plate is symmetrically fixedly connected to the top surface of the disc, a protective box is rotatably connected between the two strip plates, a laser instrument is detachably connected in the protective box, an annular gear plate is fixedly connected to the top surface of the support plate, a control component is transmission-connected to the annular gear plate, the control component is fixedly connected to the top surface of the disc, a connecting shaft is transmission-connected to the control component, an end of the connecting shaft passes through the strip plate and is fixedly connected to the protective box, a drive box is symmetrically fixedly connected in the protective box, a roller is installed between the two drive boxes, a wiping cloth is wrapped around the outside of the roller, and the wiping cloth is used to clean the end face of the laser instrument.

[0007] Preferably, the control component includes a connecting frame fixed to the top surface of the disc, the connecting frame is rotatably connected to a rotating shaft, the top of the rotating shaft is fixed with a second spur gear, the bottom of the rotating shaft is fixed with a column gear, the column gear is meshed with the inner ring of the annular gear plate, the top surface of the connecting frame is symmetrically fixed with a hydraulic cylinder, the top of the hydraulic cylinder is fixed with a first motor, the output shaft of the first motor is fixed with a vertical shaft, the top of the vertical shaft is fixed with a first spur gear, and the first spur gear is meshed with the second spur gear.

[0008] Preferably, a second bevel gear is fixedly connected to the vertical shaft, the second bevel gear is located below the first spur gear, a first bevel gear is fixedly connected to the end of the connecting shaft away from the protective box, the first bevel gear is located between the second bevel gear and the first spur gear, and the first bevel gear is adapted to the second bevel gear.

[0009] Preferably, connecting rods are fixedly connected at both ends of the roller shaft, one end of the connecting rod away from the roller shaft extends into the drive box and is transmission-connected with a lifting assembly, a sliding groove is provided on the side wall of the drive box, and the connecting rod is adapted to the sliding groove and is slidingly connected to the sliding groove.

[0010] Preferably, the lifting assembly includes a screw rotatably connected to the inner wall of the drive box, the screw is transmission-connected to the drive assembly, the drive assembly is fixed to the inner bottom surface of the drive box, the screw is threadedly connected to a slider, the slider is slidably connected to the inner wall of the drive box, and the end of the connecting rod extends into the slider and is rotatably connected to the slider.

[0011] Preferably, a through slot is provided on the sliding block, a fixing rod is fixed in the through slot, a third spur gear is rotatably connected to the fixing rod, a fourth spur gear is meshed on one side of the third spur gear, a rack is meshed on the other side of the third spur gear, the rack is fixed to the inner wall of the driving box, and the connecting rod extends into the through slot and is fixed to the fourth spur gear.

[0012] Preferably, the driving assembly includes a second motor fixedly connected to the inner wall of the driving box, the output shaft of the second motor is fixedly connected to a first pulley, the first pulley is connected to a second pulley via a belt drive, and the second pulley is fixedly connected to the lead screw.

[0013] Preferably, a snap-in plate is symmetrically fixed in the protective box, a groove is provided on the snap-in plate, one end of a plurality of springs is fixed in the groove, a partition is fixed to the other end of the spring, the partition is slidably connected to the groove, the laser instrument is detachably connected between the two partitions, a conical head is fixed to the side wall of the laser instrument, and the conical head is in contact with the inner wall of the protective box.

[0014] Preferably, a sliding plate is fixedly connected to the bottom surface of the support plate, a column is provided on the outer sliding sleeve of the sliding plate, a multi-stage telescopic rod is fixedly connected inside the column, and an output end of the multi-stage telescopic rod is fixedly connected to the sliding plate.

[0015] A laser gas detection method comprises the following steps:

[0016] The laser instrument emits a laser, which passes through the detection area and is reflected back to the receiving device through the reflective surface, and the signal is transmitted to the computer for analysis;

[0017] The control component drives the disc to rotate, so that the laser instrument can perform all-round detection in the horizontal direction;

[0018] The control component drives the connecting shaft to rotate, and the protective box rotates vertically, so that the laser instrument can perform all-round detection in the vertical direction;

[0019] When not in use, the roller moves up and down along the direction of the drive box to clean the surface of the laser.

[0020] The invention discloses the following technical effects: when in use, the disc can be rotated on the supporting plate through the control component, and the disc drives the protection box to rotate. One side of the protection box is open, which is convenient for the laser instrument to emit laser. The protection box drives the laser instrument to rotate, thereby realizing all-round detection in the horizontal direction, without the need to arrange multiple laser instruments, saving costs and high efficiency; the control component can also drive the connecting shaft to rotate, and the connecting shaft drives the protection box to rotate in the vertical direction, thereby expanding the detection range, with strong adjustability and more convenient use; the strip plate supports the protection box and facilitates the rotation of the protection box to detect gases in different directions; after being used for a period of time, dust will inevitably adhere to the end face of the laser instrument, thereby affecting the inspection accuracy, and the roller is driven by the driving box to reciprocate in the vertical direction. When the wiping cloth on the roller contacts the laser instrument, the attached dust is taken away, thereby ensuring the cleanliness of the end face and improving the accuracy of the detection. While the driving box drives the roller to move up and down, it can also cause the roller to rotate, thereby improving the cleaning efficiency. The present invention can realize multi-directional adjustment and detect gas in different directions, so as to timely find out whether gas is leaking; and has a self-cleaning function, so there is no need for manual regular cleaning, which saves time and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A partial enlarged view of middle A;

[0024] Figure 3 is a cross-sectional view of the protective box of the present invention;

[0025] Figure 4 is a side view of the protective box of the present invention;

[0026] Figure 5It is an assembly diagram of the clamping plate and the laser instrument of the present invention;

[0027] Figure 6 For the present invention Figure 3 Main cross-section of the middle drive box;

[0028] Figure 7 For the present invention Figure 3 A top view of the middle drive box;

[0029] Figure 8 It is a schematic diagram of the internal structure of the column of the present invention;

[0030] Among them, 1. support plate; 2. annular gear plate; 3. protection box; 4. disc; 5. strip plate; 6. connecting frame; 7. column; 8. column gear; 9. rotating shaft; 10. connecting shaft; 11. first bevel gear; 12. second bevel gear; 13. first spur gear; 14. vertical shaft; 15. first motor; 16. hydraulic cylinder; 17. second spur gear; 18. clamping plate; 19. laser instrument; 20. drive box; 21. slide groove; 22. roller shaft; 23. connecting rod; 24. groove; 25. spring; 26. partition; 27. second motor; 28. first pulley; 29. ​​belt; 30. screw; 31. second pulley; 32. rack; 33. slider; 34. third spur gear; 35. fourth spur gear; 36. through groove; 37. fixed rod; 38. sliding plate; 39. multi-stage telescopic rod; 40. conical head. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1-Figure 8The present invention provides a laser gas detection device, including a support plate 1, a circular groove is opened at the center of the top surface of the support plate 1, a disc 4 is rotatably connected in the circular groove, a strip plate 5 is symmetrically fixedly connected to the top surface of the disc 4, a protection box 3 is rotatably connected between the two strip plates 5, a laser instrument 19 is detachably connected in the protection box 3, an annular gear plate 2 is fixedly connected to the top surface of the support plate 1, the annular gear plate 2 is transmission-connected to a control component, the control component is fixedly connected to the top surface of the disc 4, the control component is transmission-connected to a connecting shaft 10, the end of the connecting shaft 10 passes through the strip plate 5 and is fixedly connected to the protection box 3, a driving box 20 is symmetrically fixedly connected in the protection box 3, a roller 22 is installed between the two driving boxes 20, the outer side of the roller 22 is wrapped with a wiping cloth, and the wiping cloth is used to clean the end surface of the laser instrument 19.

[0034] When in use, the disc 4 can be rotated on the support plate 1 through the control component, and the disc 4 drives the protection box 3 to rotate. One side of the protection box 3 is open, which is convenient for the laser instrument 19 to emit laser. The protection box 3 drives the laser instrument 19 to rotate, thereby realizing all-round detection in the horizontal direction, without the need to arrange multiple laser instruments 19, saving costs and high efficiency; the control component can also drive the connecting shaft 10 to rotate, and the connecting shaft 10 drives the protection box 3 to rotate in the vertical direction, thereby expanding the detection range, with strong adjustability and more convenient use; the strip plate 5 supports the protection box 3 and facilitates the rotation of the protection box 3 to detect gases in different directions; after using for a period of time, dust will inevitably adhere to the end face of the laser instrument 19, thereby affecting the inspection accuracy. The roller 22 is driven to reciprocate in the vertical direction by the drive box 20. When the wiping cloth on the roller 22 contacts the laser instrument 19, the attached dust is taken away, thereby ensuring the cleanliness of the end face and improving the accuracy of the detection. The drive box 20 drives the roller 22 to move up and down while also causing the roller 22 to rotate, thereby improving the cleaning efficiency. The present invention can realize multi-directional adjustment and detect gas in different directions, so as to timely find out whether gas is leaking; and has a self-cleaning function, so there is no need for manual regular cleaning, which saves time and improves work efficiency.

[0035] Further optimized solution, the control assembly includes a connecting frame 6 fixed to the top surface of the disc 4, the connecting frame 6 is rotatably connected to the rotating shaft 9, the top of the rotating shaft 9 is fixed to the second spur gear 17, the bottom of the rotating shaft 9 is fixed to the column gear 8, the column gear 8 is meshed with the inner ring of the annular gear plate 2, the top surface of the connecting frame 6 is symmetrically fixed to the hydraulic cylinder 16, the top of the hydraulic cylinder 16 is fixed to the first motor 15, the output shaft of the first motor 15 is fixed to the vertical shaft 14, the top of the vertical shaft 14 is fixed to the first spur gear 13, the first spur gear 13 is meshed with the second spur gear 17. The first motor 15 drives the vertical shaft 14 to rotate, the vertical shaft 14 drives the first spur gear 13 to rotate, the first spur gear 13 drives the second spur gear 17 to rotate, the second spur gear 17 drives the rotating shaft 9 to rotate, the rotating shaft 9 drives the column gear 8 to rotate, the column gear 8 is meshed with the annular gear plate 2, and since the annular gear plate 2 is fixed, the column gear 8 rotates around the annular gear plate 2, so that the connecting frame 6 drives the disc 4 to rotate, and gas detection in different directions is realized.

[0036] To further optimize the solution, a second bevel gear 12 is fixedly connected to the vertical shaft 14, the second bevel gear 12 is located below the first spur gear 13, and the first bevel gear 11 is fixedly connected to the end of the connecting shaft 10 away from the protective box 3, the first bevel gear 11 is located between the second bevel gear 12 and the first spur gear 13, and the first bevel gear 11 is adapted to the second bevel gear 12. When the hydraulic cylinder 16 drives the first motor 15 to move upward, the first spur gear 13 and the second spur gear 17 are disengaged, and the first bevel gear 11 and the second bevel gear 12 are engaged with each other, the first motor 15 drives the vertical shaft 14 to rotate, the vertical shaft 14 drives the second bevel gear 12 to rotate, the second bevel gear 12 drives the first bevel gear 11 to rotate, the first bevel gear 11 drives the connecting shaft 10 to rotate, and the connecting shaft 10 drives the protective box 3 to rotate, thereby realizing vertical adjustment and expanding the detection range; the setting of the hydraulic cylinder 16 can flexibly switch whether the first spur gear 13 is meshed with the second spur gear 17 or the first bevel gear 11 is meshed with the second bevel gear 12, thereby controlling the laser instrument 19 to rotate horizontally or vertically, realizing that one driving source controls multi-directional adjustment, reducing energy consumption and saving costs.

[0037] Further optimization scheme, connecting rods 23 are fixedly connected at both ends of the roller shaft 22, and one end of the connecting rod 23 away from the roller shaft 22 extends into the driving box 20 and is connected to the lifting assembly in a transmission manner. A slide groove 21 is provided on the side wall of the driving box 20, and the connecting rod 23 is adapted to the slide groove 21 and is slidably connected to the slide groove 21. The lifting assembly in the driving box 20 drives the connecting rod 23 to move up and down, and the connecting rod 23 drives the roller shaft 22 to move up and down, thereby realizing the cleaning of the end face of the laser instrument 19. The setting of the slide groove 21 facilitates the up and down movement of the connecting rod 23, and at the same time limits the connecting rod 23 to ensure the stability of the operation process.

[0038] Further optimized solution, the lifting assembly includes a lead screw 30 rotatably connected to the inner wall of the driving box 20, the lead screw 30 is transmission-connected to the driving assembly, the driving assembly is fixed to the inner bottom surface of the driving box 20, the lead screw 30 is threadedly connected to the slider 33, the slider 33 is slidably connected to the inner wall of the driving box 20, and the end of the connecting rod 23 extends into the slider 33 and is rotatably connected to the slider 33. The driving assembly drives the lead screw 30 to rotate, the lead screw 30 drives the slider 33 to slide in the vertical direction, and the slider 33 drives the connecting rod 23 to move, thereby realizing the up and down movement of the roller 22, which is convenient for quickly cleaning the attached dust. After cleaning, the roller 22 is located below the laser instrument 19, which does not affect its normal use.

[0039] Further optimization scheme, the slider 33 is provided with a through slot 36, a fixed rod 37 is fixed in the through slot 36, a third spur gear 34 is rotatably connected to the fixed rod 37, a fourth spur gear 35 is meshed on one side of the third spur gear 34, a rack 32 is meshed on the other side of the third spur gear 34, the rack 32 is fixed to the inner wall of the drive box 20, and the connecting rod 23 extends into the through slot 36 and is fixed to the fourth spur gear 35. When the slider 33 slides along the lead screw 30, the third spur gear 34 moves along with the slider 33, and the third spur gear 34 meshes with the rack 32, so that the third spur gear 34 rotates, the third spur gear 34 drives the fourth spur gear 35 to rotate, the fourth spur gear 35 drives the connecting rod 23 to rotate, and the connecting rod 23 drives the roller shaft 22 to rotate, so that the roller shaft 22 moves up and down and rotates at the same time, which accelerates the cleaning efficiency; and the rotation of the roller shaft 22 is realized by the movement of the slider 33, without the need for an additional drive source, saving energy, and having a good transmission effect.

[0040] Further optimizing the scheme, the driving assembly includes a second motor 27 fixedly connected to the inner wall of the driving box 20, the output shaft of the second motor 27 is fixedly connected to the first pulley 28, the first pulley 28 is connected to the second pulley 31 through the belt 29, and the second pulley 31 is fixedly connected to the lead screw 30. The second motor 27 drives the first pulley 28 to rotate, the first pulley 28 drives the second pulley 31 to rotate through the belt 29, and the second pulley 31 drives the lead screw 30 to rotate, thereby realizing the movement of the slider 33, which is convenient for the subsequent cleaning work.

[0041] Further optimization scheme, the protective box 3 is symmetrically fixed with a clamping plate 18, the clamping plate 18 is provided with a groove 24, one end of a plurality of springs 25 is fixed in the groove 24, the other end of the spring 25 is fixed with a partition 26, the partition 26 is slidably connected to the groove 24, the laser instrument 19 is detachably connected between the two partitions 26, the side wall of the laser instrument 19 is fixed with a conical head 40, and the conical head 40 is in contact with the inner wall of the protective box 3. During installation, the conical head 40 at the tail of the laser instrument 19 is inserted into the groove 24 of the clamping plate 18, the conical head 40 squeezes the partition 26, and the spring 25 is compressed at this time. After the laser instrument 19 is fully inserted, the laser instrument 19 is clamped by the reaction force of the spring 25, to ensure the stability of the rotation process, and is easy to install and disassemble, and is convenient for replacement and maintenance.

[0042] Further optimizing the scheme, the bottom surface of the support plate 1 is fixedly connected with a sliding plate 38, the outer side of the sliding plate 38 is slidably sleeved with a column 7, a multi-stage telescopic rod 39 is fixedly connected inside the column 7, and the output end of the multi-stage telescopic rod 39 is fixedly connected to the sliding plate 38. The multi-stage telescopic rod 39 drives the sliding plate 38 to slide in the vertical direction, and the height of the laser instrument 19 can be adjusted, which further expands the detection range and has strong practicality.

[0043] A laser gas detection method comprises the following steps:

[0044] The laser instrument 19 emits a laser of a specific wavelength. The central wavelength is different for different media to be detected. After the laser passes through the gas monitoring area, it reaches the reflection surface and is reflected back to the light receiving device. If there is a characteristic gas to be detected in the gas area through which the laser passes, the laser will be absorbed by the characteristic gas. The higher the concentration of the characteristic gas, the greater the absorption amount. The laser instrument 19 will detect the change in laser intensity and feed it back to the control unit of the computer for processing, and finally obtain the detection concentration;

[0045] The first motor 15 drives the vertical shaft 14 to rotate, the vertical shaft 14 drives the first spur gear 13 to rotate, the first spur gear 13 drives the second spur gear 17 to rotate, the second spur gear 17 drives the rotating shaft 9 and the column gear 8 to rotate, the column gear 8 moves around the annular gear plate 2, thereby rotating the disc 4, so that the laser instrument 19 performs all-round detection in the horizontal direction;

[0046] The hydraulic cylinder 16 extends upward, causing the first bevel gear 11 to contact the second bevel gear 12, thereby driving the connecting shaft 10 to rotate, and the connecting shaft 10 drives the protective box 3 to rotate vertically, so that the laser instrument 19 performs all-round detection in the vertical direction;

[0047] The second motor 27 drives the lead screw 30 to rotate, and the rotation of the lead screw 30 drives the slider 33 to slide up and down, and the slider 33 drives the connecting rod 23 to move, and the connecting rod 23 drives the roller shaft 22 to move up and down along the direction of the drive box 20. At the same time, the roller shaft 22 rotates through the cooperation of the third spur gear 34, the fourth spur gear 35 and the rack 32 to quickly clean the surface of the laser instrument 19.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A laser gas detection device, characterized in that: The invention comprises a support plate (1), wherein a circular groove is provided at the center of the top surface of the support plate (1), a circular disc (4) is rotatably connected in the circular groove, a strip plate (5) is symmetrically fixedly connected to the top surface of the circular disc (4), a protection box (3) is rotatably connected between the two strip plates (5), a laser instrument (19) is detachably connected in the protection box (3), an annular toothed plate (2) is fixedly connected to the top surface of the support plate (1), the annular toothed plate (2) is transmission-connected to a control component, the control component is fixedly connected to the top surface of the circular disc (4), the control component is transmission-connected to a connecting shaft (10), the end of the connecting shaft (10) passes through the strip plate (5) and is fixedly connected to the protection box (3), a driving box (20) is symmetrically fixedly connected in the protection box (3), a roller shaft (22) is installed between the two driving boxes (20), a wiping cloth is wrapped around the outer side of the roller shaft (22), and the wiping cloth is used to clean the end surface of the laser instrument (19).

2. The laser gas detection device according to claim 1, characterized in that: The control assembly comprises a connecting frame (6) fixedly connected to the top surface of the disc (4); the connecting frame (6) is rotatably connected to a rotating shaft (9); a second spur gear (17) is fixedly connected to the top of the rotating shaft (9); a column gear (8) is fixedly connected to the bottom of the rotating shaft (9); the column gear (8) is meshed with the inner ring of the annular gear plate (2); a hydraulic cylinder (16) is symmetrically fixedly connected to the top surface of the connecting frame (6); a first motor (15) is fixedly connected to the top of the hydraulic cylinder (16); an output shaft of the first motor (15) is fixedly connected to a vertical shaft (14); a first spur gear (13) is fixedly connected to the top of the vertical shaft (14); the first spur gear (13) is meshed with the second spur gear (17).

3. The laser gas detection device according to claim 2, characterized in that: A second bevel gear (12) is also fixedly connected to the vertical shaft (14), and the second bevel gear (12) is located below the first spur gear (13). A first bevel gear (11) is fixedly connected to the end of the connecting shaft (10) away from the protective box (3), and the first bevel gear (11) is located between the second bevel gear (12) and the first spur gear (13), and the first bevel gear (11) is adapted to the second bevel gear (12).

4. The laser gas detection device according to claim 1, characterized in that: The two ends of the roller shaft (22) are respectively fixedly connected with connecting rods (23); one end of the connecting rod (23) away from the roller shaft (22) extends into the driving box (20) and is transmission-connected with a lifting assembly; a sliding groove (21) is provided on the side wall of the driving box (20); the connecting rod (23) is adapted to the sliding groove (21) and is slidably connected to the sliding groove (21).

5. The laser gas detection device according to claim 4, characterized in that: The lifting assembly comprises a lead screw (30) rotatably connected to the inner wall of the drive box (20); the lead screw (30) is transmission-connected to the drive assembly; the drive assembly is fixedly connected to the inner bottom surface of the drive box (20); the lead screw (30) is threadedly connected to a slider (33); the slider (33) is slidably connected to the inner wall of the drive box (20); an end of the connecting rod (23) extends into the slider (33) and is rotationally connected to the slider (33).

6. The laser gas detection device according to claim 5, characterized in that: The slider (33) is provided with a through slot (36), a fixing rod (37) is fixedly connected in the through slot (36), a third spur gear (34) is rotatably connected to the fixing rod (37), a fourth spur gear (35) is meshed on one side of the third spur gear (34), a rack (32) is meshed on the other side of the third spur gear (34), the rack (32) is fixedly connected to the inner wall of the driving box (20), and the connecting rod (23) extends into the through slot (36) and is fixedly connected to the fourth spur gear (35).

7. The laser gas detection device according to claim 5, characterized in that: The driving assembly comprises a second motor (27) fixedly connected to the inner wall of the driving box (20); the output shaft of the second motor (27) is fixedly connected to a first pulley (28); the first pulley (28) is connected to a second pulley (31) via a belt (29); and the second pulley (31) is fixedly connected to the lead screw (30).

8. The laser gas detection device according to claim 1, characterized in that: A snap-in plate (18) is symmetrically fixed inside the protection box (3), and a groove (24) is provided on the snap-in plate (18). One end of a plurality of springs (25) is fixed inside the groove (24), and a partition (26) is fixed to the other end of the spring (25). The partition (26) is slidably connected to the groove (24), and the laser instrument (19) is detachably connected between the two partitions (26). A conical head (40) is fixed to the side wall of the laser instrument (19), and the conical head (40) is in contact with the inner wall of the protection box (3).

9. The laser gas detection device according to claim 1, characterized in that: The bottom surface of the support plate (1) is fixedly connected to a sliding plate (38), the outer sliding sleeve of the sliding plate (38) is provided with a column (7), the column (7) is fixedly connected to a multi-stage telescopic rod (39), and the output end of the multi-stage telescopic rod (39) is fixedly connected to the sliding plate (38).

10. A laser gas detection method, according to the laser gas detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The laser instrument (19) emits a laser, which passes through the detection area and is reflected back to the receiving device through the reflection surface, and the signal is transmitted to the computer for analysis; The control component drives the disc (4) to rotate, so that the laser instrument (19) performs all-round detection in the horizontal direction; The connecting shaft (10) is driven to rotate by the control component, so that the protection box (3) rotates vertically, and the laser instrument (19) performs all-round detection in the vertical direction; When not in use, the roller (22) moves up and down along the direction of the driving box (20) to clean the surface of the laser instrument (19).

Images