Gas cloud imaging camera for gas leakage detection

Abstract

The invention relates to the field of cameras, and discloses a gas cloud imaging camera for gas leakage detection, which comprises a camera, a lens arranged at one end of the camera and a telescopic shade mechanism arranged on the camera, the telescopic shade mechanism comprises a fixed shade body arranged at the top of the camera, a movable shade body arranged on the fixed shade body and a telescopic rod assembly, the fixed shade body extends out of the upper side of the lens in the camera shooting direction, and the telescopic rod assembly can drive the movable shade body to extend out and retract relative to the fixed shade body in the camera shooting direction; therefore, the shielding range of the telescopic shielding mechanism is adjusted. The telescopic shielding cover mechanism can drive the movable cover body to slide so as to adjust the shielding range above the lens, compared with a shielding cover with the fixed length size in a traditional mode, the situation that the shielding area above the lens is too large or too small, and consequently the image quality and the gas leakage detection accuracy are affected is conveniently reduced, and the reliability of gas detection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cameras, and in particular to a gas cloud imaging camera for gas leakage detection. Background Art

[0002] The gas cloud imaging camera is a monitoring device specially designed for long-distance, non-contact detection of hydrocarbon hazardous gases and capable of displaying the trajectory of leaking gas in real time. The gas cloud imaging camera uses advanced spectral imaging technology to capture infrared spectra and visible light videos to monitor, quantify and display the leakage of explosive and toxic and hazardous gases. The gas cloud imaging camera is usually set up outdoors and can operate in a variety of weather conditions to accurately image and display gas clouds, gas forms and concentrations. In order to block harmful light from entering the lens, a hood is usually set on the top of the lens to reduce glare and flare.

[0003] The sunshade of the existing gas cloud imaging camera for gas leak detection is generally fixedly connected to the camera and has a fixed length. However, the position of the sun outdoors changes during the day, and the angle of light shining on the camera also changes, which makes it difficult for the existing sunshade to cover the lens, making it easy for harmful light to enter the lens. When the sunshade's blocking range is too large, it is easy to prevent normal light from entering the lens, thereby affecting the image quality and the accuracy of gas leak detection, resulting in insufficient reliability of gas detection. In addition, the existing gas leak detection adopts an automatic cleaning method, and the cleaning brush is usually moved directly along the lens during cleaning, which easily causes the cleaning brush to drive dust particles with higher hardness to move along the lens surface and damage the lens, thereby affecting the image quality and the accuracy of gas leak detection. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that the light shield cannot be adjusted, which affects the detection accuracy under different lighting conditions.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a gas cloud imaging camera for gas leak detection, characterized in that it includes a camera, a lens arranged at one end of the camera and a telescopic shield mechanism arranged on the camera, the telescopic shield mechanism includes a fixed shield body arranged on the top of the camera, a movable shield body arranged on the fixed shield body and a telescopic rod assembly, the fixed shield body extends from the upper side of the lens along the shooting direction, and the telescopic rod assembly can drive the movable shield body to extend and retract relative to the fixed shield body along the shooting direction to adjust the shielding range of the telescopic shield mechanism.

[0006] In some embodiments, the telescopic shield mechanism comprises a plurality of movable shield bodies arranged in a stacked manner.

[0007] Among them, in the two adjacent movable cover bodies, the bottom surface of the upper movable cover body is provided with a first stopper and a second stopper spaced along the shooting direction, and the top surface of the lower movable cover body is provided with a third stopper located between the first stopper and the second stopper, and the first stopper and the second stopper can push the third stopper to move along the shooting direction;

[0008] Or wherein, in two adjacent movable cover bodies, the top surface of the movable cover body on the lower side is provided with a first stopper and a second stopper spaced along the camera direction, and the bottom surface of the movable cover body on the upper side is provided with a third stopper located between the first stopper and the second stopper, and the third stopper can push the first stopper and the second stopper to move along the camera direction.

[0009] In some embodiments, a sliding matching structure consisting of a first sliding groove and a sliding bar is used between the movable cover body and the fixed cover body, and between adjacent movable cover bodies.

[0010] In some embodiments, a negative pressure mechanism is also included, which includes a first transmission assembly, a box, a lifting plate arranged in the box, and a blowing assembly toward the lens, a pressure chamber connected to the blowing assembly is formed between the lifting plate and the box, and the telescopic movement of the telescopic rod assembly can drive the lifting plate to move relative to the box through the first transmission assembly, and the volume of the pressure chamber changes and exhausts gas toward the lens through the blowing assembly.

[0011] In some embodiments, the telescopic rod assembly is connected to a coaxial threaded rod, and the first transmission assembly includes an eccentric cylinder screwed to the threaded rod, and a sleeve rotatably sleeved on the eccentric cylinder and connected to the lifting plate. The telescopic rod assembly can drive the threaded rod to move axially to drive the eccentric cylinder to rotate, thereby driving the sleeve and the lifting plate to move linearly relative to the threaded rod and the box.

[0012] In some embodiments, the blowing assembly is connected to the pressure chamber through a one-way exhaust valve, a one-way air inlet valve is provided on the lifting plate, and a water inlet hole is provided on the top of the box body. Water entering the box body through the water inlet hole can enter the pressure chamber through the one-way air inlet valve 35.

[0013] In some embodiments, it is characterized in that it also includes a cleaning mechanism and a second transmission assembly, the cleaning mechanism includes a cleaning brush and a reciprocating screw arranged on the front side of the lens, the cleaning brush is screwed to the reciprocating screw, and the telescopic rod assembly can drive the reciprocating screw to rotate through the second transmission assembly, thereby driving the cleaning brush to move on the lens.

[0014] In some embodiments, the cleaning mechanism includes a first cover plate and a second cover plate arranged on the front side of the camera, and a debris removal slider slidably arranged on the cleaning brush, the first cover plate is arranged around the lens, and the second cover plate surrounds the first cover plate to form a slideway between the first cover plate and the second cover plate to partially accommodate the debris removal slider, the extension direction of the cleaning brush is arranged at an angle to the extension direction of the slideway, and the movement of the cleaning brush can drive the debris removal slider to slide along the extension direction of the cleaning brush to remove debris on the cleaning brush.

[0015] In some embodiments, the slide is a rhombus including four sub-slides, wherein a top block is provided on the outer side of the ends of a group of sub-slides opposite to each other, and the top block is located at both ends of the moving range of the cleaning brush, and the top block can be elastically retracted to allow the debris removal slider to pass through, and the top block can be elastically extended to push the debris removal slider into the adjacent sub-slide.

[0016] In some embodiments, the camera is provided with a second slide groove surrounding the lens, the second slide groove has the same shape as the slideway and is aligned with each other, the debris removal slider is connected to a rotatable slide located in the second slide groove, and the size of the slide is larger than the width of the slideway.

[0017] The technical effects achieved by the present invention are:

[0018] The present invention adopts the design of a telescopic shield mechanism, which can drive the movable shield to slide to adjust the shielding range above the lens. After the telescopic rod assembly works, the output end is extended or shortened, so that the threaded rod drives the movable shield to slide along the camera. At the same time, a plurality of movable shields slide relatively with each other, so that the overall length of the plurality of movable shields increases or decreases, thereby increasing or decreasing the shielding area above the lens. Compared with the traditional method of a light shield with a fixed length, it is convenient to reduce the situation where the shielding area above the lens is too large or too small to affect the image quality and the accuracy of gas leakage detection, thereby improving the reliability of gas detection.

[0019] The present invention adopts the design of a negative pressure mechanism and a cleaning mechanism. The negative pressure mechanism can blow away the dust attached to the lens and then the cleaning mechanism cleans the lens. The threaded rod also drives the eccentric cylinder to rotate during its movement. After the eccentric cylinder rotates, it drives the one-way air intake valve to rise and fall back and forth, so that the negative pressure mechanism squeezes the air in the box and blows air to the lens through the blowing and spraying assembly to blow away the dust attached to the lens. At the same time, after the eccentric cylinder rotates, it also drives the reciprocating screw to rotate, so that the cleaning brush moves back and forth along the lens to clean the surface of the lens. When it rains, the box collects rainwater. Driven by the threaded rod, the negative pressure mechanism squeezes the rainwater in the box and sprays water to the lens through the blowing and spraying assembly to further clean the lens, thereby reducing the situation where the cleaning brush drives dust particles with higher hardness to move along the lens surface and damage the lens, thereby improving the reliability of gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is an exploded schematic diagram of the negative pressure mechanism and the cleaning mechanism in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the telescopic shielding mechanism in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the negative pressure mechanism in the present invention;

[0024] Figure 5 is a cross-sectional schematic diagram of the negative pressure mechanism and the threaded rod in the present invention;

[0025] Figure 6 is a cross-sectional schematic diagram of the blowing assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the cleaning mechanism and the fixed cover body in the present invention;

[0027] Figure 8 The present invention Figure 7 The enlarged schematic diagram of point A in the middle;

[0028] Fig. 9 It is a structural schematic diagram of the movable cover body in the present invention;

[0029] Fig.10 It is an exploded schematic diagram of the cleaning mechanism in the present invention;

[0030] Fig.11 It is a structural schematic diagram of the cleaning mechanism in the present invention;

[0031] Fig.12 The present invention Fig.11 The enlarged schematic diagram of point B in the middle;

[0032] Fig.13 It is a structural schematic diagram of the eccentric cylinder and the reciprocating screw in the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 10. body; 11. camera; 111. second slide slot; 12. lens;

[0035] 20. telescopic shield mechanism; 21. fixed shield body; 22. movable shield body; 221. slide bar; 222. first slide slot; 223. first stopper; 224. second stopper; 225. third stopper; 23. telescopic rod assembly; 24. threaded rod;

[0036] 30. Negative pressure mechanism; 31. Box; 32. Lifting plate; 33. Eccentric cylinder; 34. Sleeve; 35. One-way air inlet valve; 36. One-way air exhaust valve; 37. Blowing and spraying assembly; 371. Fixed pipe; 372. Rotating pipe; 373. Limiting sleeve; 374. Spray head;

[0037] 40. cleaning mechanism; 41. reciprocating screw; 42. cleaning brush; 43. debris removal slider; 431. slide; 44. first cover plate; 45. second cover plate; 46. slideway; 47. top block; 48. spring; 49. collecting tank; 491. sieve hole;

[0038] 51. First pulley; 52. Second pulley; 53. Third pulley; 54. Fourth pulley; 55. First transmission belt; 56. Second transmission belt; 57. First bevel gear; 58. Second bevel gear. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0040] In the present invention, unless otherwise stated, the directional words used, such as "up, down, left, right", generally refer to the relative position relationship in the installed and used state. This is only to describe the scheme more clearly and is not a special limitation on this scheme.

[0041] refer to Figure 1-Figure 13As shown, the present invention provides a gas cloud imaging camera for gas leak detection, which includes a camera 11, a lens 12 arranged at one end of the camera 11, and a telescopic shield mechanism 20 arranged on the camera 11, wherein the telescopic shield mechanism 20 includes a fixed shield body 21 arranged on the top of the camera 11, a movable shield body 22 arranged on the fixed shield body 21, and a telescopic rod assembly 23, wherein the fixed shield body 21 extends from the upper side of the lens 12 along the shooting direction, and the telescopic rod assembly 23 can drive the movable shield body 22 to extend and retract relative to the fixed shield body 21 along the shooting direction to adjust the shielding range of the telescopic shield mechanism 20.

[0042] The gas-cloud imaging camera may include a body 10, a camera 11 arranged on the top of the body 10, a lens 12 arranged at one end of the camera 11, and a fixed cover body 21 and a movable cover body 22 arranged on the top of the end where the lens 12 is arranged, the fixed cover body 21 and the movable cover body 22 are located on the upper side in front of the lens 12, and can form a shielding protection for the lens 12.

[0043] The telescopic rod assembly 23 can telescope, thereby driving the movable cover body 22 to extend or retract relative to the fixed cover body 21 , and its moving direction is the shooting direction of the lens 12 , that is, the orientation of the lens 12 .

[0044] The fixed cover 21 can be a plate-like structure, or Figure 3 As shown, the movable cover body 22 includes a top plate and two side plates surrounding the lens 12 , and can be roughly a plate-shaped structure, which cooperates with the fixed cover body 21 to block light within a certain range.

[0045] When the movable cover body 22 is extended, the shielding range can be increased, and when it is retracted, the shielding range can be reduced.

[0046] In this solution, the telescopic shield mechanism can drive the movable shield body to slide to adjust the shielding range above the lens. Compared with the traditional shield with a fixed length, it is convenient to reduce the situation where the shielding area above the lens is too large or too small, which affects the image quality and the accuracy of gas leakage detection, thereby improving the reliability of gas detection.

[0047] In some embodiments, the telescopic cover mechanism 20 includes a plurality of movable cover bodies 22 arranged in a stacked manner.

[0048] Among them, in the two adjacent movable cover bodies 22, the bottom surface of the upper movable cover body 22 is provided with a first stopper 223 and a second stopper 224 spaced along the shooting direction, and the top surface of the lower movable cover body 22 is provided with a third stopper 225 located between the first stopper 223 and the second stopper 224, and the first stopper 223 and the second stopper 224 can push the third stopper 225 to move along the shooting direction;

[0049] Or, in the two adjacent movable cover bodies 22, the top surface of the movable cover body 22 on the lower side is provided with a first stop block 223 and a second stop block 224 spaced apart along the camera direction, and the bottom surface of the movable cover body 22 on the upper side is provided with a third stop block 225 located between the first stop block 223 and the second stop block 224, and the third stop block 225 can push the first stop block 223 and the second stop block 224 to move along the camera direction.

[0050] refer to Figure 8 and Fig. 9 As shown, the bottom surface of the movable cover body 22 is provided with a first stopper 223 and a second stopper 224, and correspondingly, the top surface of the movable cover body 22 adjacent to the lower portion thereof is provided with a third stopper 225, and the third stopper 225 is located between the first stopper 223 and the second stopper 224, and the distance between the first stopper 223 and the second stopper 224 is greater than the size of the third stopper 225. The telescopic rod assembly 23 can push the first (from top to bottom) movable cover body 22 to extend, and the first stopper 223 on the first movable cover body 22 can push the third stopper 225 of the second movable cover body 22 to move, thereby driving the second movable cover body 22 to extend, and sequentially driving the third, fourth, and other movable cover bodies 22 to extend, and when the telescopic rod assembly 23 pulls the first movable cover body 22 back, the second stopper 224 pushes the third stopper 225 on the second movable cover body 22 to retract, thereby driving the second movable cover body 22 to retract, and sequentially driving the third, fourth, and other movable cover bodies 22 to retract.

[0051] Of course, as described above, the first stopper 223 and the second stopper 224 can also be arranged on the top surface of the movable cover body 22, and the third stopper 225 can be arranged on the bottom surface of the movable cover body, which can also realize the sequential extension and retraction of multiple movable cover bodies 22, which will not be described in detail here.

[0052] It can be seen that the multiple movable covers 22 can overlap with each other, that is, they can be retracted as a whole to reduce the shielding range. The multiple or at least some of the movable covers 22 can also be at least partially staggered with each other, that is, they can be extended along the shooting direction.

[0053] In some embodiments, a sliding fit structure consisting of a first slide groove 222 and a slide bar 221 is used between the movable cover body 22 and the fixed cover body 21, or between adjacent movable cover bodies 22. Between adjacent movable cover bodies 22 or between the movable cover body 22 and the fixed cover body 21, one is provided with a slide bar 221, and the other is provided with a first slide groove 222, and the slide bar 221 can be slidably accommodated in the first slide groove 222, so that a sliding fit is formed between adjacent movable cover bodies 22 or fixed cover bodies 21. The cross-sections of the slide bar 221 and the first slide groove 222 can be trapezoidal or T-shaped to limit the slide bar 221 from being separated from the first slide groove 222.

[0054] In some embodiments, the gas cloud imaging camera for gas leak detection further includes a negative pressure mechanism 30, the negative pressure mechanism 30 includes a first transmission assembly, a box 31, a lifting plate 32 disposed in the box 31, and a blowing assembly 37 toward the lens 12, a pressure chamber connected to the blowing assembly 37 is formed between the lifting plate 32 and the box 31, the telescopic movement of the telescopic rod assembly 23 can drive the lifting plate 32 to move relative to the box 31 through the first transmission assembly, the volume of the pressure chamber changes and the gas is discharged toward the lens 12 through the blowing assembly 37. Reference Figure 5 As shown, the box body 31 is divided into two parts by the lifting plate 32, wherein the lower part is the pressure chamber, and the blowing assembly 37 is connected to the pressure chamber and faces the lens 12. When the telescopic rod assembly 23 is extended or retracted, the lifting plate 32 can be driven to move by the first transmission assembly, and when the lifting plate 32 moves toward the pressure chamber, the volume of the pressure chamber is reduced to discharge the gas therein through the blowing assembly 37, so that the gas can be blown toward the lens 12, and the gas can blow away dust and other debris on the lens 12.

[0055] In some embodiments, the telescopic rod assembly 23 is connected to a coaxial threaded rod 24, the first transmission assembly includes an eccentric cylinder 33 threaded to the threaded rod 24, and a sleeve 34 rotatably sleeved on the eccentric cylinder 33 and connected to the lifting plate 32, the telescopic rod assembly 23 can drive the threaded rod 24 to move axially, so as to drive the eccentric cylinder 33 to rotate, thereby driving the sleeve 34 and the lifting plate 32 to move linearly relative to the threaded rod 24 and the box 31. Figure 3 As shown, the threaded rod 24 is connected between the telescopic rod assembly 23 and the movable cover body 22. When the telescopic rod assembly 23 moves in a telescopic manner, the threaded rod 24 can be driven to move axially, which can drive the movable cover body 22 to move and the eccentric cylinder 33 to rotate. Figure 5As shown, when the eccentric cylinder 33 rotates, the sleeve 34 moves back and forth laterally relative to the threaded rod 24, thereby driving the lifting plate 32 connected to the sleeve 34 to move back and forth, wherein a connecting rod is provided between the sleeve 34 and the lifting plate 32, the connecting rod is fixedly connected to the lifting plate 32 and is hinged to the sleeve 34, and the connecting rod and the lifting plate 32 can limit the sleeve 34 from rotating relative to the threaded rod 24. Figure 5 As shown, the threaded rod 24 is inserted into the box 31 and is located on the upper side of the lifting plate 32.

[0056] In some embodiments, the blowing assembly 37 is connected to the pressure chamber through a one-way exhaust valve 36, a one-way air inlet valve 35 is provided on the lifting plate 32, and a water inlet hole is provided on the top of the box body 31, and water entering the box body 31 through the water inlet hole can enter the pressure chamber through the one-way air inlet valve 35. Figure 5 As shown, when the lifting plate 32 rises, the one-way air inlet valve 35 allows gas (and water) to enter the pressure chamber. At this time, the one-way exhaust valve 36 is in a closed state. When the lifting plate 32 descends, the one-way exhaust valve 36 opens, and the one-way air inlet valve 35 is closed to allow gas (and water) to be discharged through the blowing assembly 37 and sprayed onto the lens 12.

[0057] refer to Figure 6 As shown, the blowing assembly 37 includes a fixed tube 371, a rotating tube 372, a limiting sleeve 373 and a nozzle 374. The fixed tube 371 is perpendicular to the outlet of the one-way exhaust valve 36. The rotating tube 372 is rotatably connected to both ends of the fixed tube 371. The nozzle 374 is connected to the side of the rotating tube 372. When the rotating tube 372 rotates relative to the fixed tube 371, the nozzle 374 can be driven to rotate to adjust the angle of the nozzle 374. The limiting sleeve 373 is connected to the fixed cover body 21 and is sleeved on the rotating tube 372. The inner circumference of the limiting sleeve 373 and the outer circumference of the rotating tube 372 are rough surfaces, which can increase the sliding friction between the limiting sleeve 373 and the rotating tube 372 to prevent the rotating tube 372 from rotating relative to the limiting sleeve 373 under the action of gravity.

[0058] In addition, in some embodiments, the gas cloud imaging camera for gas leak detection further includes a cleaning mechanism 40 and a second transmission assembly, wherein the cleaning mechanism 40 includes a cleaning brush 42 and a reciprocating screw 41 disposed on the front side of the lens 12, wherein the cleaning brush 42 is screwed to the reciprocating screw 41, and the telescopic rod assembly 23 can drive the reciprocating screw 41 to rotate through the second transmission assembly, thereby driving the cleaning brush 42 to move on the lens 12. Figure 7 , Fig.10As shown, the cleaning brush 42 is generally strip-shaped, and its length can be approximately the diameter of the lens 12, so as to completely cover the range of the lens 12. The telescopic movement of the telescopic rod assembly 23 can drive the reciprocating screw 41 to rotate through the second transmission assembly. One end of the cleaning brush 42 is screwed to the reciprocating screw 41, and when the reciprocating screw 41 rotates, it can reciprocate along the length direction of the reciprocating screw 41, that is, reciprocate on the surface of the lens 12, so as to wipe the lens 12. The cleaning brush 42 cooperates with the blowing assembly 37, and in particular, the water sprayed by the blowing assembly 37 can help the cleaning brush 42 to wipe.

[0059] In addition, in some embodiments, the cleaning mechanism 40 includes a first cover plate 44 and a second cover plate 45 disposed on the front side of the camera 11, and a debris removal slider 43 slidably disposed on the cleaning brush 42, the first cover plate 44 is disposed around the lens 12, the second cover plate 45 surrounds the first cover plate 44 to form a slideway 46 between the first cover plate 44 and the second cover plate 45 to partially accommodate the debris removal slider 43, the extension direction of the cleaning brush 42 is arranged at an angle to the extension direction of the slideway 46, and the movement of the cleaning brush 42 can drive the debris removal slider 43 to slide along the extension direction of the cleaning brush 42 to remove the debris on the cleaning brush 42. Reference Figure 7 As shown, the first cover plate 44 surrounds the lens 12, and the second cover plate 45 surrounds the first cover plate 44, and a slideway 46 is formed between the two. The extension direction of the slideway 46 is at an angle to the extension direction of the cleaning brush 42, so that the movement of the debris removal slider 43 can be guided. Among them, the movement direction of the cleaning brush 42 and its extension direction are perpendicular to each other. When the cleaning brush 42 moves, the debris removal slider 43 thereon slides relative to the cleaning brush 42 along its extension direction under the guidance of the slideway 46, and the debris removal slider 43 can scrape off the debris on the cleaning brush 42. Among them, a groove for accommodating the bristle part of the cleaning brush 42 can be formed on the debris removal slider 43, so as to scrape off the debris on the bristles when sliding, and squeeze out the liquid in the cleaning brush 42, so as to reduce the situation where the cleaning brush 42 drives dust particles with higher hardness to move along the surface of the lens 12 and damage the lens 12, thereby improving the reliability of gas detection.

[0060] In some embodiments, the slide 46 is a rhombus including four sub-slides, and a top block 47 is provided on the outer side of the ends of a group of sub-slides opposite to each other. The top block 47 is located at both ends of the moving range of the cleaning brush 42. The top block 47 can be elastically retracted to allow the debris removal slider 43 to pass through, and the top block 47 can be elastically extended to push the debris removal slider 43 into the adjacent sub-slide. Figure 7As shown, the slide 46 may include an upper left sub-slide, an upper right sub-slide, a lower left sub-slide and a lower right sub-slide, the cleaning brush 42 reciprocates in the left and right directions, and extends in the up and down directions, and the debris removal slider 43 can slide in the up and down directions on the cleaning brush 42. Among them, a top block 47 is provided on the outer side of the lower end of the upper left sub-slide, and a top block 47 is provided on the outer side of the upper end of the lower right sub-slide. When the cleaning brush 42 moves from left to right, the debris removing sliding block 43 moves to the lower right in the lower left sub-slide, and moves to the upper right in the lower right sub-slide. When it moves to the top block 47, the top block 47 can be pushed to be retracted to pass over the top block 47, and then the top block 47 elastically extends out to push the debris removing sliding block 43 into the upper right sub-slide, instead of moving to the lower left in the lower right sub-slide; then, the cleaning brush 42 starts to move from right to left, the debris removing sliding block 43 moves to the upper left in the upper right sub-slide, and moves to the lower left in the upper left sub-slide. When it moves to the top block 47, the top block 47 can be pushed to be retracted to pass over the top block 47, and then the top block 47 elastically extends out to push the debris removing sliding block 43 into the lower left sub-slide, instead of moving to the upper right in the upper left sub-slide. It can be seen that, through the action of the top block 47, the debris-removing sliding block 43 can be made to move cyclically in the four sub-slideways, rather than only moving in the two adjacent lower sub-slideways or the two upper sub-slideways.

[0061] The second cover plate 45 is provided with a spring 48 on the outside of the top block 47, which can push the top block 47 to extend into the slideway 46. The portion of the top block 47 located in the slideway 46 forms an arc surface to allow the debris removal slider 43 to pass over and push it to move to the adjacent sub-slideway.

[0062] The camera 11 is provided with a second slide groove 111 surrounding the lens 12, the second slide groove 111 has the same shape as the slideway 46 and is aligned with each other, the impurity removal slider 43 is connected with a rotatable slide plate 431 located in the second slide groove 111, and the size of the slide plate 431 is greater than the width of the slideway 46. Figure 2 As shown, the camera 11 is provided with a second slide groove 111, and a slide sheet 431 is accommodated in the second slide groove 111. The size of the slide sheet 431 is larger than the size of the slideway 46. The slide sheet 431 is located between the first cover plate 44, the second cover plate 45 and the camera 11, and can prevent the debris removal slider 43 from being separated from the slideway 46. The slide sheet 431 can rotate relative to the debris removal slider 43 to reduce the friction between the slide sheet 431 and the second slide groove 111.

[0063] In addition, a collecting groove 49 is provided below the cleaning brush 42, and the collecting groove 49 extends along the moving direction of the cleaning brush 42. The collecting groove 49 can collect the debris scraped off by the cleaning slider 43, thereby collecting dust and impurities, reducing the situation where the dust and impurities scraped off by the cleaning brush 42 have nowhere to be collected and float around, and reducing the situation where these dust and impurities float onto the lens 12. In addition, a sieve hole 491 is provided at the bottom of the collecting groove 49 to allow liquid to be discharged.

[0064] Among them, reference Fig.13 The second transmission assembly includes a first pulley 51, a second pulley 52, a third pulley 53, a fourth pulley 54, a first transmission belt 55, a second transmission belt 56, a first bevel gear 57, and a second bevel gear 58. The first pulley 51 can be connected to the eccentric cylinder 33 (or can be screwed to the threaded rod 24) to be driven to rotate by the threaded rod 24. The first pulley 51 is connected to the second pulley 52 through the first transmission belt 55. The second pulley 52 is coaxially connected to the third pulley 53. The third pulley 53 drives the fourth pulley 54 through the second transmission belt 56. The fourth pulley 54 is coaxially connected to the first bevel gear 57. The first bevel gear 57 is meshed with the second bevel gear 58 coaxially connected to the reciprocating screw 41.

[0065] Example 1

[0066] like Figures 1 to 12As shown in the figure, it is the first embodiment of the present invention, which provides a gas cloud imaging camera for gas leak detection, including a body 10, a camera 11 is arranged on the upper end of the body 10, and a lens 12 is arranged at one end of the camera 11; a telescopic shielding mechanism 20, the telescopic shielding mechanism 20 is arranged on the top of the camera 11, and is used to block the light above the lens 12, the telescopic shielding mechanism 20 includes a fixed cover body 21 fixedly connected to the top of the camera 11, and a plurality of movable cover bodies 22 are slidably connected to the fixed cover body 21 in sequence, a telescopic rod assembly 23 is fixedly connected to the top of the camera 11, and a threaded rod 24 is fixedly connected to the output end of the telescopic rod assembly 23, and the end of the threaded rod 24 is fixedly connected to the movable cover body 22; a negative pressure mechanism 30, the negative pressure mechanism 30 is arranged on the top of the camera 11, and is used to blow air and spray water to the lens 12, the negative pressure mechanism 30 includes a box body 31 fixedly connected to the top of the camera 11, and a lifting plate 32 is slidably connected inside the box body 31, and the lifting plate 32 is fixedly connected to the lifting plate 32. 2 is provided with an eccentric cylinder 33, which is rotatably connected to the box body 31, and the eccentric cylinder 33 is threadedly connected to the threaded rod 24. The outer side of the eccentric cylinder 33 is rotatably connected to a sleeve 34, and the sleeve 34 is fixedly connected to the lifting plate 32. A one-way air inlet valve 35 is fixedly connected to the lifting plate 32, and a one-way exhaust valve 36 is fixedly connected to the box body 31. The one-way exhaust valve 36 is located below the lifting plate 32, and the output end of the one-way exhaust valve 36 is fixedly connected to a blowing assembly 37, and the blowing assembly 37 is located below the lifting plate 32. On the outside of the lens 12; a cleaning mechanism 40, the cleaning mechanism 40 is arranged at the end of the camera 11, and is used to clean the lens 12. The cleaning mechanism 40 includes a reciprocating screw 41 rotatably connected to the inner wall of the fixed cover body 21, and a cleaning brush 42 is threadedly connected to the reciprocating screw 41. The cleaning brush 42 fits the lens 12, and a debris removal slider 43 is slidably connected to the cleaning brush 42. The debris removal slider 43 is slidably connected to the camera 11, and the reciprocating screw 41 is transmission-connected to the sleeve 34.

[0067] It should be noted that the reciprocating screw 41 is a prior art, which is used to convert the rotational motion into the reciprocating linear motion of the cleaning brush 42 without changing the rotation direction of the reciprocating screw 41. It will not be repeated here. A groove is provided on the side of the impurity removal slider 43 close to the cleaning brush 42, and the groove slides with the cleaning brush 42. An eccentric wheel is integrated on the eccentric cylinder 33, and the axis of the eccentric wheel is offset from the axis of the eccentric cylinder 33. A sieve plate is provided on the top of the box body 31. The aperture size of the sieve plate is smaller than the diameter size of the dust impurities, which is used to reduce the dust impurities from falling into the inside of the box body 31 and even clogging the one-way air intake valve 35. The one-way air intake valve 35 and the one-way exhaust valve 36 are both one-way valves. The one-way air intake valve 35 only allows gas or liquid to move from the top of the lifting plate 32 to the bottom of the lifting plate 32, and the one-way exhaust valve 36 only allows gas or liquid to move from the inside of the box body 31 to the blowing assembly 37.

[0068] When the present invention is in use, when it is necessary to adjust the shielding area above the lens 12, the output end of the telescopic rod assembly 23 is extended or shortened after operation, so that the output end of the telescopic rod assembly 23 drives the threaded rod 24 to move, and the threaded rod 24 drives the plurality of movable cover bodies 22 to slide, so that the overall length of the plurality of movable cover bodies 22 is increased or decreased, thereby adjusting the shielding area above the lens 12, which is convenient for reducing the situation where the shielding area above the lens 12 is too large or too small, affecting the image quality and the accuracy of gas leakage detection, and improving the reliability of gas detection. At the same time, when the threaded rod 24 moves, it also drives the eccentric cylinder 33 to rotate. Since the eccentric cylinder 33 is eccentric to the threaded rod 24, the eccentric cylinder 33 rotates around the axial direction of the threaded rod 24. Since the sleeve 34 is rotatably connected to the eccentric cylinder 33, the sleeve 34 rotates relative to the eccentric cylinder 33, but not relative to the threaded rod 24, that is, as the eccentric cylinder 33 rotates, the sleeve 34 reciprocates up and down, thereby causing the sleeve 34 to drive the lifting plate 32 to reciprocate up and down. When the lifting plate 32 is lifted and lowered, the sleeve 34 can be lifted and lowered. When the plate 32 moves upward along the box body 31, the gas or liquid above the lifting plate 32 moves to the bottom of the lifting plate 32 through the one-way air inlet valve 35. When the lifting plate 32 moves downward along the box body 31, the lifting plate 32 squeezes the gas or liquid below the lifting plate 32, so that the gas or liquid moves to the blowing assembly 37 through the one-way exhaust valve 36 and is discharged, so that the blowing assembly 37 blows air or sprays water to the lens 12, and when the eccentric cylinder 33 rotates, it also drives the reciprocating screw 41 to rotate, so that the reciprocating screw 41 drives the cleaning brush 42 to move back and forth along the lens 12 to clean the surface of the lens 12. At the same time, the cleaning brush 42 also drives the impurity removal slider 43 to move, so that the impurity removal slider 43 also slides along the cleaning brush 42 during the sliding process along the camera 11, thereby facilitating the scraping of impurities attached to the cleaning brush 42, and squeezing out the liquid in the cleaning brush 42, reducing the situation where the cleaning brush 42 drives dust particles with higher hardness to move along the surface of the lens 12 and damage the lens 12, thereby improving the reliability of gas detection.

[0069] Example 2

[0070] Reference Figures 1 to 13 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0071] like Fig.13As shown, the end of the eccentric cylinder 33 is fixedly connected to the first pulley 51, the outer side of the fixed cover 21 is rotatably connected to the second pulley 52 and the third pulley 53, the second pulley 52 and the third pulley 53 are fixedly connected, a first transmission belt 55 is connected between the first pulley 51 and the second pulley 52, the outer side of the fixed cover 21 is rotatably connected to the fourth pulley 54 and the first bevel gear 57, the fourth pulley 54 and the first bevel gear 57 are fixedly connected, a second transmission belt 56 is connected between the third pulley 53 and the fourth pulley 54, and the end of the reciprocating screw 41 is fixedly connected to the second bevel gear 58, and the first bevel gear 57 and the second bevel gear 58 are meshed.

[0072] According to the above structure, in the process of the eccentric cylinder 33 driving the reciprocating screw 41 to rotate, the eccentric cylinder 33 first drives the first pulley 51 to rotate, the first pulley 51 drives the second pulley 52 and the third pulley 53 to rotate through the first transmission belt 55, the third pulley 53 drives the fourth pulley 54 and the first bevel gear 57 to rotate through the second transmission belt 56, and the first bevel gear 57 drives the reciprocating screw 41 to rotate through the second bevel gear 58, so that the cleaning mechanism 40 can clean the lens 12 as the negative pressure mechanism 30 moves.

[0073] like Figure 8 and Fig. 9 As shown, a slide bar 221 is fixedly connected to the top of the movable cover body 22 , and a first slide groove 222 is fixedly connected to the bottom of the movable cover body 22 . The slide bar 221 and the first slide groove 222 are slidably matched.

[0074] It should be noted that the cross-sectional shapes of the slide bar 221 and the first slide groove 222 are both trapezoidal or T-shaped.

[0075] According to the above structure, the slide bar 221 cooperates with the first slide groove 222 to make the sliding process between the plurality of movable covers 22 more stable.

[0076] like Figure 8 and Fig. 9 As shown, the end of the first slide groove 222 close to the fixed cover body 21 is fixedly connected to the first stopper 223, the end of the first slide groove 222 away from the fixed cover body 21 is fixedly connected to the second stopper 224, and the top of the movable cover body 22 is fixedly connected to the third stopper 225.

[0077] It should be noted that the third stopper 225 is detachably connected to the movable cover body 22 via screws.

[0078] According to the above structure, the third stopper 225 is detachably connected to the movable cover body 22, so that the two movable cover bodies 22 can be slidably connected together after the third stopper 225 is removed, and then the third stopper 225 is installed on the movable cover body 22, thereby facilitating the sliding connection of the two movable cover bodies 22.

[0079] like Figure 8 and Fig. 9 As shown, when the movable cover body 22 is slidably connected with the adjacent movable cover body 22 , the third stopper 225 is located between the first stopper 223 and the second stopper 224 .

[0080] According to the above structure, during the sliding process between two adjacent movable cover bodies 22, when the movable cover body 22 slides outward, the first stopper 223 fits with the third stopper 225 to prevent the two movable cover bodies 22 from separating from each other; when the movable cover body 22 slides inward, the second stopper 224 fits with the third stopper 225 to prevent the two movable cover bodies 22 from separating from each other, thereby facilitating the avoidance of separation between the movable cover bodies 22 during the sliding process of several movable cover bodies 22 and improving the sliding reliability of the movable cover bodies 22.

[0081] like Figure 6 As shown, the blowing assembly 37 includes a fixed tube 371 fixedly connected to the output end of the one-way exhaust valve 36, both ends of the fixed tube 371 are rotatably connected to a rotating tube 372, the outer rotation of the rotating tube 372 is connected to a limiting sleeve 373, the limiting sleeve 373 is fixedly connected to the fixed cover body 21, and the rotating tube 372 is fixedly connected to a nozzle 374.

[0082] It should be noted that the fixed pipe 371 , the rotating pipe 372 and the nozzle 374 are connected.

[0083] According to the above structure, when the gas or liquid moves to the inside of the blowing assembly 37 through the one-way exhaust valve 36, the gas or liquid first moves to the fixed tube 371, and then moves to the nozzle 374 through the rotating tube 372, and is then discharged onto the lens 12 through the nozzle 374, so as to achieve blowing or spraying of water on the lens 12.

[0084] like Figure 6 As shown, the inner surface of the limiting sleeve 373 is roughened, and the outer surface of the rotating tube 372 close to the limiting sleeve 373 is roughened.

[0085] According to the above structure, when it is necessary to adjust the angle of the nozzle 374 relative to the lens 12, the rotating tube 372 is rotated along the fixed tube 371, so that the rotating tube 372 drives the nozzle 374 to rotate, thereby adjusting the angle of the nozzle 374, and the rotating tube 372 also rotates inside the limiting sleeve 373 during the rotation process. Since the inner surface of the limiting sleeve 373 and the outer surface of the rotating tube 372 are in contact with each other and are roughened, the friction between the limiting sleeve 373 and the rotating tube 372 is increased, and the rotation of the rotating tube 372 along the limiting sleeve 373 under the action of its own gravity is reduced, which facilitates fixing the relative position between the rotating tube 372 and the limiting sleeve 373, thereby facilitating the keeping of the angle of the nozzle 374 fixed after rotation.

[0086] like Figure 2 , Figure 7 , Fig.10 , Fig.11 and Fig.12 As shown, a second slide groove 111 is opened on the camera 11, and a slide 431 is fixedly connected to one end of the impurity removal slider 43 close to the second slide groove 111, and the slide 431 is slidably matched with the second slide groove 111. A first cover plate 44 and a second cover plate 45 are provided on one side of the second slide groove 111, and the first cover plate 44 and the second cover plate 45 are both fixedly connected to the camera 11, and a slide 46 is formed between the first cover plate 44 and the second cover plate 45, and the slide 46 is aligned with the second slide groove 111, and the slide 46 is slidably matched with the impurity removal slider 43.

[0087] It should be noted that the slide 431 is circular in shape, and the slide 431 and the second slide groove 111 are not only slidably fitted but also rotationally fitted. The size of the slide 46 is smaller than the diameter of the slide 431, and is used to prevent the slide 431 from separating from the second slide groove 111. The second slide groove 111 and the slide 46 are both rhombus-shaped.

[0088] According to the above structure, during the reciprocating movement of the cleaning brush 42 along the lens 12, the cleaning brush 42 drives the impurity removal slider 43 to rotate in circles along the second slide groove 111, so that the impurity removal slider 43 can slide up and down along the cleaning brush 42, scrape off the impurities attached to the cleaning brush 42, and squeeze out the liquid in the cleaning brush 42.

[0089] like Fig.10 , Fig.11 and Fig.12 As shown, the second cover plate 45 is slidably connected with a top block 47 at positions close to both ends of the slideway 46 , and a plurality of springs 48 are connected between the top block 47 and the second cover plate 45 .

[0090] It should be noted that the side of the top block 47 close to the slideway 46 is arc-shaped, so that the impurity removal slider 43 can push the top block 47 to slide along the second cover plate 45 .

[0091] According to the above structure, in the process of the debris removing slider 43 cyclically rotating along the second slide groove 111 one circle after another, when the debris removing slider 43 moves to the two ends of the second slide groove 111 and the slideway 46, it is necessary to move from the lower half circle of the second slide groove 111 or the slideway 46 to the upper half circle, or from the lower half circle of the second slide groove 111 or the slideway 46 to the upper half circle. In order to prevent the debris removing slider 43 from always moving in the upper half circle or the lower half circle, it is necessary to move the debris removing slider 43 to the other half circle through the top block 47. In the process of the debris removing slider 43 moving to the two ends of the second slide groove 111 and the slideway 46, The debris removing slider 43 first contacts with the top block 47, and the debris removing slider 43 pushes the top block 47, so that the top block 47 slides inwardly along the second cover plate 45. At this time, the spring 48 is squeezed by the top block 47 and its height is reduced. When the debris removing slider 43 reaches the end points of the second slide groove 111 and the slideway 46, the spring 48 pushes the top block 47 to move outwardly along the second cover plate 45 under the elastic action, so that the top block 47 pushes the debris removing slider 43 to move to the other half circle of the second slide groove 111 or the slideway 46, thereby facilitating the cleaning brush 42 to drive the debris removing slider 43 to rotate in a circle along the second slide groove 111.

[0092] like Fig.10 As shown, a collecting groove 49 is provided below the cleaning brush 42 , and a plurality of sieve holes 491 are provided at the bottom of the collecting groove 49 .

[0093] It should be noted that the size of the sieve hole 491 is smaller than the diameter of the dust impurities.

[0094] According to the above structure, the impurity removal slider 43 scrapes off the impurities attached to the cleaning brush 42, and squeezes out the liquid in the cleaning brush 42, and the impurities and liquid fall into the collecting tank 49, wherein the liquid is discharged through the sieve hole 491, and the dust impurities are blocked and remain in the collecting tank 49, thereby realizing the collection of dust impurities, reducing the situation where the dust impurities scraped off by the cleaning brush 42 have nowhere to be collected and float around, and reducing the situation where these dust impurities float onto the lens 12.

[0095] The working principle of the present invention is as follows: after the telescopic shield mechanism 20 works, it drives several movable shield bodies 22 to slide to adjust the shielding area above the lens 12, so as to reduce the situation that the shielding area above the lens 12 is too large or too small, which affects the image quality and the accuracy of gas leakage detection, and improves the reliability of gas detection. After the telescopic shield mechanism 20 works, it also drives the negative pressure mechanism 30 to work. When it is not raining, the negative pressure mechanism 30 discharges the gas entering the box body 31 to the lens 12 through the blowing and spraying assembly 37. When it is raining, the negative pressure mechanism 30 discharges the rainwater entering the box body 31 to the lens 12 through the blowing and spraying assembly 37, so as to blow air and spray water on the lens 12, thereby removing dust and impurities on the lens 12, reducing the situation that the cleaning brush 42 drives dust particles with higher hardness to move along the surface of the lens 12 and damage the lens 12, and improving the reliability of gas detection. After the negative pressure mechanism 30 works, it also drives the cleaning mechanism 40 to work, so that the cleaning brush 42 cleans the surface of the lens 12 with the action of the negative pressure mechanism 30.

[0096] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A gas cloud imaging camera for gas leak detection, characterized in that: The invention comprises a camera (11), a lens (12) arranged at one end of the camera (11), and a telescopic shield mechanism (20) arranged on the camera (11); the telescopic shield mechanism (20) comprises a fixed shield body (21) arranged on the top of the camera (11), a movable shield body (22) arranged on the fixed shield body (21), and a telescopic rod assembly (23); the fixed shield body (21) extends from the upper side of the lens (12) along the shooting direction; the telescopic rod assembly (23) can drive the movable shield body (22) to extend and retract relative to the fixed shield body (21) along the shooting direction, so as to adjust the shielding range of the telescopic shield mechanism (20).

2. The gas cloud imaging camera for gas leak detection according to claim 1, characterized in that: The telescopic shield mechanism (20) comprises a plurality of movable shield bodies (22) arranged in a stacked manner. Among them, in the two adjacent movable cover bodies (22), the bottom surface of the upper movable cover body (22) is provided with a first stopper (223) and a second stopper (224) spaced apart along the shooting direction, and the top surface of the lower movable cover body (22) is provided with a third stopper (225) located between the first stopper (223) and the second stopper (224), and the first stopper (223) and the second stopper (224) can push the third stopper (225) to move along the shooting direction; Alternatively, in two adjacent movable cover bodies (22), the top surface of the movable cover body (22) on the lower side is provided with a first stopper (223) and a second stopper (224) spaced apart along the shooting direction, and the bottom surface of the movable cover body (22) on the upper side is provided with a third stopper (225) located between the first stopper (223) and the second stopper (224), and the third stopper (225) can push the first stopper (223) and the second stopper (224) to move along the shooting direction.

3. The gas cloud imaging camera for gas leak detection according to claim 2, characterized in that: A sliding matching structure consisting of a first sliding groove (222) and a sliding strip (221) is used between the movable cover body (22) and the fixed cover body (21), and between adjacent movable cover bodies (22).

4. The gas cloud imaging camera for gas leak detection according to claim 1, characterized in that: The invention also comprises a negative pressure mechanism (30), the negative pressure mechanism (30) comprising a first transmission assembly, a box (31), a lifting plate (32) arranged in the box (31), and a blowing assembly (37) facing the lens (12), a pressure chamber connected to the blowing assembly (37) is formed between the lifting plate (32) and the box (31), the telescopic movement of the telescopic rod assembly (23) can drive the lifting plate (32) to move relative to the box (31) through the first transmission assembly, the volume of the pressure chamber changes and the gas is discharged toward the lens (12) through the blowing assembly (37).

5. The gas cloud imaging camera for gas leak detection according to claim 4, characterized in that: The telescopic rod assembly (23) is connected to a coaxial threaded rod (24); the first transmission assembly comprises an eccentric cylinder (33) threadedly connected to the threaded rod (24); and a sleeve (34) rotatably sleeved on the eccentric cylinder (33) and connected to the lifting plate (32); the telescopic rod assembly (23) is capable of driving the threaded rod (24) to move axially, thereby driving the eccentric cylinder (33) to rotate, thereby driving the sleeve (34) and the lifting plate (32) to move linearly relative to the threaded rod (24) and the box (31).

6. The gas cloud imaging camera for gas leak detection according to claim 4, characterized in that: The blowing assembly (37) is connected to the pressure chamber via a one-way exhaust valve (36); a one-way air inlet valve (35) is provided on the lifting plate (32); a water inlet hole is provided on the top of the box body (31); water entering the box body (31) through the water inlet hole can enter the pressure chamber through the one-way air inlet valve 35.

7. The gas cloud imaging camera for gas leak detection according to any one of claims 1 to 6, characterized in that: The invention also comprises a cleaning mechanism (40) and a second transmission assembly, wherein the cleaning mechanism (40) comprises a cleaning brush (42) and a reciprocating screw (41) arranged on the front side of the lens (12), the cleaning brush (42) being screwed to the reciprocating screw (41), and the telescopic rod assembly (23) can drive the reciprocating screw (41) to rotate through the second transmission assembly, thereby driving the cleaning brush (42) to move on the lens (12).

8. The gas cloud imaging camera for gas leak detection according to claim 7, characterized in that: The cleaning mechanism (40) comprises a first cover plate (44) and a second cover plate (45) arranged on the front side of the camera (11), and a debris removal slider (43) slidably arranged on the cleaning brush (42); the first cover plate (44) is arranged around the lens (12); the second cover plate (45) surrounds the first cover plate (44) to form a slideway (46) between the first cover plate (44) and the second cover plate (45) for partially accommodating the debris removal slider (43); the extension direction of the cleaning brush (42) is arranged at an angle to the extension direction of the slideway (46); the movement of the cleaning brush (42) can drive the debris removal slider (43) to slide along the extension direction of the cleaning brush (42) to remove debris on the cleaning brush (42).

9. The gas cloud imaging camera for gas leak detection according to claim 8, characterized in that: The slideway (46) is a rhombus-shaped slideway including four sub-slideways, wherein a top block (47) is arranged on the outer side of the ends of a group of sub-slideways that are opposite to each other, and the top block (47) is located at both ends of the moving range of the cleaning brush (42). The top block (47) can be elastically retracted to allow the debris removal slider (43) to pass through, and the top block (47) can be elastically extended to push the debris removal slider (43) into the adjacent sub-slideway.

10. The gas cloud imaging camera for gas leak detection according to claim 9, characterized in that: The camera (11) is provided with a second slide groove (111) surrounding the lens (12); the second slide groove (111) and the slideway (46) have the same shape and are aligned with each other; the debris removal slider (43) is connected to a rotatable slide plate (431) located in the second slide groove (111); and the size of the slide plate (431) is greater than the width of the slideway (46).

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