A gas detection device based on infrared imaging

Abstract

The present invention discloses a gas detection device based on infrared imaging, including a mounting seat, a spectrum detection mechanism and a shell sleeve, wherein a flat heat dissipation plate is fixedly arranged at the upper end of the mounting seat; a turntable is rotatably connected to the bottom of the mounting seat, a sliding shell is slidably connected in the groove, a filter screen is fixedly arranged at the inner opening, two U-shaped frames are slidably connected to the outer side of the outer opening, filter cotton is embedded in the sliding shell; and a shield is rotatably connected in the positioning shell. In the present invention, firstly, the rotation of the turntable is controlled by a driving member to switch the positions of the two sliding shells, so that the two sliding shells are alternately responsible for the inflow or outflow of gas, so as to meet the long-term and effective filtration of dust and moisture in the air when the device is used, thereby being beneficial to the long-term and effective protection of the optical elements, and secondly, the docking interface of the positioning shell is closed under the action of the shield, so that the device is kept in a sealed state as a whole when idle, which is beneficial to the protection of the optical elements.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to a gas detection device based on infrared imaging. Background Art

[0002] Infrared imaging gas detection device is a device that uses infrared technology to detect gas leaks. This device usually uses an infrared sensor to detect the spectral absorption characteristics of specific gas molecules to determine the type and concentration of the gas.

[0003] Infrared detectors generate heat when working. If the heat cannot be dissipated in time, it will cause the device to overheat, affecting the stability and accuracy of the device, and may even damage the detector components. Heat dissipation ensures that the device can operate at a suitable temperature and extend its service life. However, most existing technologies directly meet the heat dissipation needs of the detector through open heat dissipation channels. During the heat dissipation process, dust and particles may accumulate on the optical components of the detector, affecting its light transmittance and detection accuracy. In some industrial environments, the accumulation of dust and particles is particularly serious, which may quickly degrade the performance of the device.

[0004] Although the existing technology can solve the problem of dust accumulation by adding a filter on the outside of the heat dissipation channel, dust easily accumulates on the surface of the filter after long-term use and affects the flow of air, which is not conducive to efficient heat dissipation of the equipment. In addition, when the detection equipment is idle, if the equipment is exposed to a high humidity environment for a long time, it will affect the stability and life of the optical components of the equipment.

[0005] In view of the above-mentioned defects, a device for detecting gas leakage using infrared technology is provided. Summary of the invention

[0006] The purpose of the present invention is to propose a gas detection device based on infrared imaging in order to solve the above problems.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a gas detection device based on infrared imaging, comprising a mounting seat, a spectrum detection mechanism and a shell sleeve mounted on the mounting seat, a flat heat sink is fixedly provided at the upper end of the mounting seat, a channel and a heat dissipation groove connected to the channel are formed inside the flat heat sink, two positioning shells are fixedly provided at the bottom of the mounting seat, two opening grooves corresponding to the positioning shells are formed in the mounting seat, one of the positioning shells is connected to the channel through the opening groove, and the other positioning shell is connected to the channel through an air pump mounted on the mounting seat;

[0008] The bottom of the mounting seat is rotatably connected with a turntable, and a driving member for controlling the rotation of the turntable is installed at the bottom of the mounting seat. Two grooves are formed inside the turntable, and a sliding shell is slidably connected in the groove. An inner opening and an outer opening are formed through the sliding shell. A filter screen is fixed at the inner opening, and two U-shaped frames are slidably connected to the outer side of the outer opening, and filter cotton is embedded in the sliding shell;

[0009] A docking port is formed on the inner side of the positioning shell, a shutter which cooperates with the docking port for opening and closing is rotatably connected in the positioning shell, a traction member which pulls the sliding shell to dock with the positioning shell is provided at the bottom of the positioning shell, a linkage member is provided in the groove, and a transmission member is provided at the bottom of the positioning shell. When the sliding shell and the positioning shell are docked, the two U-shaped frames slide open under the action of the linkage member, and the shutter opens the docking port under the action of the transmission member.

[0010] Preferably, the driving member comprises a hanging plate fixed to the bottom of the mounting seat, and a driving motor for controlling the rotation of the turntable is installed at the bottom of the hanging plate.

[0011] Preferably, a frame rod cooperating with the filter cotton frame is fixedly provided inside the sliding shell, and a baffle frame is located below the frame rod, and a round block is fixedly provided at the bottom of the baffle frame.

[0012] Preferably, the traction member comprises a rack slidably connected to the positioning shell, a telescopic rod for controlling the sliding of the rack is installed at the bottom of the positioning shell, and a recess for slidingly embedding a matching round block is formed at the top of the rack.

[0013] Preferably, the linkage comprises a protrusion fixedly mounted on the side end of the U-shaped frame, and a slideway for cooperating with the protrusion to slide is formed on the side wall of the groove, and the slideway consists of a transverse groove and an oblique groove.

[0014] Preferably, the transmission member includes a bracket fixed to the bottom of the positioning shell, the inner side of the bracket is rotatably connected to a gear through an axle rod, and the gear is meshed with a rack, and a chain transmission mechanism is provided on the outer side of the positioning shell, and the baffle rotates synchronously with the gear under the action of the chain transmission mechanism.

[0015] Preferably, a pressure plate is slidably connected inside the sliding shell, a pressure piece for controlling the vertical movement of the pressure plate is provided at the bottom of the mounting seat, an opening is formed at the bottom of the sliding shell, two rotary plates for cooperating with the opening to open and close are rotatably connected to the bottom of the sliding shell, and a pull rope is fixed between the pressure plate and the rotary plate.

[0016] Preferably, the pressing member includes a guide rod fixed on the top of the pressure plate and sliding upward through the sliding shell, a sliding groove cooperating with the sliding of the guide rod is formed in the mounting seat, and a compression spring is fixed on the top of the baffle frame to press the pressure plate upward.

[0017] Preferably, the slide groove consists of an annular groove and two straight grooves connected to the annular groove, and a wave-shaped undulating structure is formed in the annular groove. When the guide rod slides from the crest of the annular groove to the trough, the guide rod will slide downward relative to the sliding shell under the pressure of the inner wall of the annular groove. When the guide rod slides from the trough to the crest, the pressure plate drives the guide rod to move upward relative to the sliding shell under the action of the compression spring.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present application, the rotation of the turntable is controlled by a driving member to switch the positions of the two sliding shells, so that the two sliding shells are alternately responsible for the inflow or outflow of gas. When the sliding shell previously responsible for the inflow of gas is switched to the gas outflow side, the outflowing gas will back-blow its filter, thereby realizing automatic cleaning of the filter. At the same time, the gas containing a certain amount of heat acts on the filter cotton to dry the filter cotton, thereby maintaining long-term and effective filtration of dust and moisture in the air, which is beneficial to long-term and effective protection of the optical elements inside the gas detection device.

[0020] 2. In the present application, when the sliding shell is not docked with the positioning shell, the inner opening of the sliding shell is engaged with the inner wall of the groove, and the two U-shaped frames keep the sliding shell closed to prevent the filter cotton from being exposed to a humid environment and affecting the next air filling. The docking port of the positioning shell is closed under the action of the shield, so that the device remains in a sealed state as a whole when idle, which is beneficial to the protection of optical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of a gas detection device provided in an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the internal structure of a housing provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of a flat heat dissipation plate provided according to an embodiment of the present invention is shown;

[0024] Figure 4 A cross-sectional schematic diagram of a flat heat sink provided according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the bottom structure of a mounting base provided according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic cross-sectional view of a mounting base and a rotating disk according to an embodiment of the present invention is shown;

[0027] Figure 7A schematic diagram of the three-dimensional structure of a sliding shell provided according to an embodiment of the present invention is shown;

[0028] Figure 8 A schematic diagram of the three-dimensional structure of a positioning shell provided according to an embodiment of the present invention is shown;

[0029] Fig. 9 It shows a schematic structural diagram of a slideway provided according to an embodiment of the present invention;

[0030] Fig.10 A cross-sectional schematic diagram of a turntable provided according to an embodiment of the present invention is shown.

[0031] Legend:

[0032] 1. Mounting seat; 101. Slide; 2. Shell; 3. Spectral detection mechanism; 4. Flat heat sink; 5. Air pump; 6. Heat sink; 7. Channel; 8. Opening slot; 9. Turntable; 901. Slide; 10. Hanging plate; 11. Driving motor; 12. Sliding shell; 13. Filter; 14. Block frame; 15. Rotary plate; 16. Rack; 17. Filter cotton; 18. Compression spring; 19. Pull rope; 20. Press plate; 21. Guide rod; 22. U-shaped frame; 23. Bump; 24. Groove; 25. Positioning shell; 26. Shield; 27. Rack; 28. Notch; 29. ​​Telescopic rod; 30. Round block; 31. Bracket; 32. Gear; 33. Chain transmission mechanism. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-10 The present invention provides a technical solution: a gas detection device based on infrared imaging, comprising a mounting base 1, a spectrum detection mechanism 3 and a shell 2 installed on the mounting base 1, a flat heat sink 4 is fixedly provided at the upper end of the mounting base 1, a channel 7 and a heat dissipation groove 6 connected to the channel 7 are formed inside the flat heat sink 4, two positioning shells 25 are fixedly provided at the bottom of the mounting base 1, two opening grooves 8 corresponding to the positioning shells 25 are formed in the mounting base 1, one of the positioning shells 25 is connected to the channel 7 through the opening groove 8, and the other positioning shell 25 is connected to the channel 7 through an air pump 5 installed on the mounting base 1.

[0035] The shell 2 and the mounting seat 1 are both made of aluminum alloy with good heat dissipation, and the thickness of the aluminum alloy is not less than 10mm. The metal mold is used for integrated molding, which can achieve the IIC level of explosion-proof gas components and have good thermal conductivity. The flat heat sink 4 is made of copper material, and the components with higher heat generation transfer the heat to the flat heat sink 4 through heat conduction, and the flat heat sink 4 then transfers the heat to the aluminum alloy at the bottom of the shell.

[0036] The air pump 5 is a prior art, and is used to speed up the exchange speed between the gas in the shell 2 and the outside gas. A temperature sensor is installed in the shell 2. When the temperature value in the cavity exceeds the set threshold, the air rushes into the channel 7 of the flat heat sink 4 from one of the positioning shells 25 under the action of the air pump 5, and accelerates the air flow around the components with large heat generation of the spectrum detection mechanism 3 through the heat dissipation groove 6. The air with a certain temperature will flow into the positioning shell 25 on the other side through the opening groove 8, and then be discharged outward, realizing the heat dissipation treatment of the gas detection device.

[0037] An air pressure sensor is installed in the shell 2. When the pressure inside the whole machine cavity differs from the atmospheric pressure to a set threshold, the air pump 5 performs an inflation or deflation operation to balance the pressure inside the cavity with the outside, thereby protecting the life of the sealing material of the shell 2.

[0038] A turntable 9 is rotatably connected to the bottom of the mounting base 1, and a driving member for controlling the rotation of the turntable 9 is installed at the bottom of the mounting base 1. Two grooves 24 are formed inside the turntable 9, and a sliding shell 12 is slidably connected in the groove 24. An inner opening and an outer opening are formed through the sliding shell 12. A filter screen 13 is fixed at the inner opening, and two U-shaped frames 22 are slidably connected to the outer side of the outer opening. Filter cotton 17 is embedded in the sliding shell 12.

[0039] The filter screen 13 is an existing metal filter screen 13, which is used to filter dust in the air, has high strength and high temperature resistance, is easy to clean, and is suitable for high temperature environments. The filter cotton 17 is composed of cotton fibers, which is a porous material with good hygroscopicity, and is used to filter moisture in humid air to ensure that the air is filled into the device in a dry state.

[0040] The rotation of the turntable 9 is controlled by the driving member, and the positions of the two sliding shells 12 are switched, so that the two sliding shells 12 are alternately responsible for the inflow or outflow of gas. When the sliding shell 12 previously responsible for the inflow of gas is switched to the gas outflow side, the outflowing gas will back-blow its filter 13, thereby realizing automatic cleaning of the filter 13. At the same time, the gas containing a certain amount of heat acts on the filter cotton 17 to dry the filter cotton 17. By rotating and switching the two sliding shells 12, the dust and moisture in the air can be filtered effectively for a long time, which is conducive to long-term and effective protection of the optical elements inside the gas detection device.

[0041] A docking port is formed on the inner side of the positioning shell 25, and a shutter 26 is rotatably connected in the positioning shell 25 to cooperate with the opening and closing of the docking port. A traction member is provided at the bottom of the positioning shell 25 to pull the sliding shell 12 to dock with the positioning shell 25. A linkage member is provided in the groove 24, and a transmission member is provided at the bottom of the positioning shell 25. When the sliding shell 12 is docked with the positioning shell 25, the two U-shaped frames 22 slide open under the action of the linkage member, and the shutter 26 opens the docking port under the action of the transmission member.

[0042] When the sliding shell 12 is not docked with the positioning shell 25, the inner opening of the sliding shell 12 is engaged with the inner wall of the groove 24, and the two U-shaped frames 22 remain in a closed state, thereby sealing the sliding shell 12 to prevent the filter cotton 17 from being exposed to a humid environment when the device is idle, thereby affecting the next air filling. At the same time, the docking port of the positioning shell 25 is kept in a closed state under the action of the shield 26, so that the device is kept in a sealed state as a whole when it is idle, thereby playing a protective role for the optical elements inside the shell 2.

[0043] Specifically, Figure 5 As shown, the driving member includes a hanging plate 10 fixed to the bottom of the mounting base 1, and a driving motor 11 for controlling the rotation of the turntable 9 is installed at the bottom of the hanging plate 10. The output end of the driving motor 11 is coaxially fixed with the turntable 9, and the turntable 9 is controlled to rotate by the driving motor 11 to switch the positions of the two sliding shells 12.

[0044] Specifically, Figure 5 , Figure 6 and Figure 8 As shown, the interior of the sliding shell 12 is fixedly provided with a frame rod 16 for mounting the filter cotton 17, and a baffle frame 14 located below the frame rod 16, and a round block 30 is fixedly provided at the bottom of the baffle frame 14; the traction member includes a rack 27 slidably connected to the positioning shell 25, and a telescopic rod 29 for controlling the sliding of the rack 27 is installed at the bottom of the positioning shell 25, and a recess 28 is formed on the top of the rack 27 for the round block 30 to slide and embed.

[0045] When the sliding shell 12 is aligned with the positioning shell 25 as the rotating disk 9 rotates, the round block 30 fixed at the bottom of the stop frame 14 will slide into the notch 28 at the top of the rack 27. At this time, the rack 27 is controlled by the telescopic rod 29 to slide along the bottom of the positioning shell 25, and the sliding shell 12 fixed to the stop frame 14 will slide and dock with the positioning shell 25. The telescopic rod 29 is an existing hydraulic or pneumatic telescopic method.

[0046] Specifically, Figure 7 and Fig.10 As shown, the linkage member includes a protrusion 23 fixed to the side end of the U-shaped frame 22, and a slideway 901 for sliding with the protrusion 23 is formed on the side wall of the groove 24, and the slideway 901 is composed of a transverse groove and an oblique groove.

[0047] When the sliding shell 12 slides and docks with the positioning shell 25, the protrusion 23 will first slide along the oblique groove of the slideway 901. At this time, under the pressure of the inner wall of the oblique groove on the outer wall of the protrusion 23, the two U-shaped frames 22 are driven to move synchronously in the opposite direction along the sliding shell 12. When the protrusion 23 slides along the slideway 901, the two U-shaped frames 22 will remain in an open state, which is conducive to the alignment and insertion of the outer opening of the sliding shell 12 and the docking interface of the positioning shell 25.

[0048] The transmission member includes a bracket 31 fixed to the bottom of the positioning shell 25. The inner side of the bracket 31 is rotatably connected to a gear 32 via an axle, and the gear 32 is meshed with the rack 27. A chain transmission mechanism 33 is provided on the outer side of the positioning shell 25. The shield 26 rotates synchronously with the gear 32 under the action of the chain transmission mechanism 33.

[0049] The chain transmission mechanism 33 is composed of an existing sprocket wheel and a chain sleeved on the outside of the two sprocket wheels, wherein one sprocket wheel is coaxially fixed with the gear wheel 32, and the other sprocket wheel is coaxially fixed with the shield plate 26. When the rack 27 slides, the gear wheel 32 will drive the shield plate 26 to rotate through the chain transmission mechanism 33.

[0050] Specifically, Figure 6 , Figure 7 and Fig. 9 As shown, the interior of the sliding shell 12 is slidably connected with a pressure plate 20, and a pressure piece for controlling the vertical movement of the pressure plate 20 is provided at the bottom of the mounting seat 1. An opening is formed at the bottom of the sliding shell 12, and two rotary plates 15 are rotatably connected to the bottom of the sliding shell 12 for cooperating with the opening to open and close. A pull rope 19 is fixed between the pressure plate 20 and the rotary plate 15.

[0051] When the pressing plate 20 presses the filter cotton 17 downward under the action of the compression mechanism, the two rotating plates 15 will rotate and open under the action of gravity, and the opening at the bottom of the sliding shell 12 will be opened, and the water squeezed out of the filter cotton 17 will flow out through the opening. When the pressing plate 20 moves upward under the action of the compression spring 18, as the pressing plate 20 moves upward, the two rotating plates 15 will rotate and close the opening at the bottom of the sliding shell 12 under the action of the pull rope 19, thereby achieving a sealing effect on the sliding shell 12.

[0052] The pressing member includes a guide rod 21 fixed on the top of the pressure plate 20 and sliding upward to penetrate the sliding shell 12. A sliding groove 101 is formed in the mounting seat 1 to cooperate with the sliding of the guide rod 21. A compression spring 18 is fixed on the top of the baffle frame 14 to press the pressure plate 20 upward.

[0053] The slide groove 101 consists of an annular groove and two straight grooves connected to the annular groove. A wave-shaped undulating structure is formed in the annular groove. When the guide rod 21 slides from the crest of the annular groove to the trough, the guide rod 21 will slide downward relative to the sliding shell 12 under the pressure of the inner wall of the annular groove. When the guide rod 21 slides from the trough to the crest, the pressure plate 20 drives the guide rod 21 to move upward relative to the sliding shell 12 under the action of the compression spring 18.

[0054] When the sliding shell 12 rotates with the turntable 9, the guide rod 21 will slide along the annular groove of the annular groove slide groove 101. During this process, the guide rod 21 will drive the pressure plate 20 to reciprocate along the sliding shell 12 under the action of the wavy inner wall in the annular groove and the compression spring 18, thereby realizing the reciprocating squeezing of the filter cotton 17 and discharging the moisture accumulated in the filter cotton 17 to the outside, which is conducive to subsequent hot air drying and achieves the purpose of recycling.

[0055] When the sliding shell 12 slides and docks with the positioning shell 25, the guide rod 21 will slide along the linear groove of the slide groove 101. A sliding rod slidably connected to the turntable 9 is fixed at the inner end of the sliding shell 12, which is conducive to ensuring the stability of the sliding shell 12 sliding along the groove 24.

[0056] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas detection device based on infrared imaging, comprising a mounting base (1), a spectrum detection mechanism (3) mounted on the mounting base (1), and a housing (2), characterized in that: A flat heat sink (4) is fixedly provided at the upper end of the mounting seat (1), a channel (7) and a heat sink (6) communicating with the channel (7) are formed inside the flat heat sink (4), two positioning shells (25) are fixedly provided at the bottom of the mounting seat (1), two opening slots (8) corresponding to the positioning shells (25) are formed in the mounting seat (1), one of the positioning shells (25) is communicated with the channel (7) via the opening slot (8), and the other positioning shell (25) is communicated with the channel (7) via an air pump (5) mounted on the mounting seat (1); The bottom of the mounting seat (1) is rotatably connected to a rotating disk (9), and a driving member for controlling the rotation of the rotating disk (9) is installed at the bottom of the mounting seat (1). Two grooves (24) are formed inside the rotating disk (9), and a sliding shell (12) is slidably connected in the groove (24). The rotation of the rotating disk (9) is controlled by the driving member to switch the positions of the two sliding shells (12). An inner opening and an outer opening are formed through the sliding shell (12), a filter screen (13) is fixedly provided at the inner opening, and two U-shaped frames (22) are slidably connected to the outer side of the outer opening. Filter cotton (17) is embedded in the sliding shell (12); A docking port is formed on the inner side of the positioning shell (25), a shutter (26) is rotatably connected in the positioning shell (25) and cooperates with the docking port to open and close, a traction member is provided at the bottom of the positioning shell (25) to pull the sliding shell (12) and the positioning shell (25) to dock, a linkage member is provided in the groove (24), and a transmission member is provided at the bottom of the positioning shell (25); when the sliding shell (12) and the positioning shell (25) are docked, the two U-shaped frames (22) slide open under the action of the linkage member, and the shutter (26) opens the docking port under the action of the transmission member.

2. A gas detection device based on infrared imaging according to claim 1, characterized in that: The driving member comprises a hanging plate (10) fixedly mounted on the bottom of the mounting seat (1), and a driving motor (11) for controlling the rotation of the rotating disk (9) is mounted on the bottom of the hanging plate (10).

3. A gas detection device based on infrared imaging according to claim 1, characterized in that: A support rod (16) for supporting the filter cotton (17) and a stop frame (14) located below the support rod (16) are fixedly disposed inside the sliding shell (12), and a round block (30) is fixedly disposed at the bottom of the stop frame (14).

4. A gas detection device based on infrared imaging according to claim 3, characterized in that: The traction member comprises a rack (27) slidably connected to a positioning shell (25); a telescopic rod (29) for controlling the sliding of the rack (27) is installed at the bottom of the positioning shell (25); and a notch (28) for slidingly embedding a matching round block (30) is formed at the top of the rack (27).

5. A gas detection device based on infrared imaging according to claim 1, characterized in that: The linkage comprises a protrusion (23) fixedly mounted on the side end of the U-shaped frame (22); a slideway (901) for cooperating with the protrusion (23) to slide is formed on the side wall of the groove (24); the slideway (901) comprises a transverse groove and an oblique groove.

6. A gas detection device based on infrared imaging according to claim 4, characterized in that: The transmission member comprises a bracket (31) fixedly mounted on the bottom of the positioning shell (25); the inner side of the bracket (31) is rotatably connected to a gear (32) via a shaft, and the gear (32) is meshed with a rack (27); a chain transmission mechanism (33) is arranged on the outer side of the positioning shell (25); and the shielding plate (26) rotates synchronously with the gear (32) under the action of the chain transmission mechanism (33).

7. A gas detection device based on infrared imaging according to claim 3, characterized in that: The sliding shell (12) is slidably connected to a pressure plate (20) inside, and a pressing member for controlling the vertical movement of the pressure plate (20) is provided at the bottom of the mounting seat (1). An opening is formed at the bottom of the sliding shell (12), and two rotating plates (15) for cooperating with the opening to open and close are rotatably connected to the bottom of the sliding shell (12), and a pull rope (19) is fixedly provided between the pressure plate (20) and the rotating plate (15).

8. A gas detection device based on infrared imaging according to claim 7, characterized in that: The pressing member comprises a guide rod (21) fixedly mounted on the top of the pressing plate (20) and slidingly extending upward through the sliding shell (12); a sliding groove (101) cooperating with the sliding of the guide rod (21) is formed in the mounting seat (1); and a compression spring (18) is fixedly mounted on the top of the stop frame (14) for pressing the pressing plate (20) upward.

9. A gas detection device based on infrared imaging according to claim 8, characterized in that: The slide groove (101) is composed of an annular groove and two linear grooves connected to the annular groove. A wave-shaped undulating structure is formed in the annular groove. When the guide rod (21) slides from the wave crest of the annular groove to the wave trough, the guide rod (21) will slide downward relative to the sliding shell (12) under the pressure of the inner wall of the annular groove. When the guide rod (21) slides from the wave trough to the wave crest, the pressure plate (20) drives the guide rod (21) to move upward relative to the sliding shell (12) under the action of the compression spring (18).

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