Hazardous chemical accident site non-contact gas detection device and detection system

Abstract

The invention relates to the technical field of hazardous chemicals, in particular to a hazardous chemical accident site non-contact gas detection device and detection system, the device comprises a controller, an infrared spectrum analyzer, a differential spectrum analyzer and a control unit; the hazardous chemical substance gas is subjected to field detection and sample collection in a non-contact manner, so that detection result deviation caused by field gas diffusion due to non-timely detection can be effectively prevented; according to the invention, the diffused gas can be subjected to multi-angle omnibearing detection, so that the detection effect is ensured; in addition, the system also comprises an infrared spectrum imaging acquisition system and a differential spectrum detection system in the infrared spectrum analyzer and the differential spectrum analyzer, an Internet of Things technology intelligent analysis system, a command center equipped data processing module, a user terminal data sending module and a user mobile terminal. Infrared spectrum image data and differential spectrum data of collected gas and an evaluation result can be transmitted to a user mobile terminal in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of hazardous chemicals, and in particular to a non-contact gas detection device and a detection system at a hazardous chemical accident site. Background Art

[0002] With the surge in social production demand for chemicals, the global output and variety of chemicals have also increased significantly, and the safety of road transportation of chemicals has become one of the core links in the safety chain of hazardous chemicals. In recent years, explosions caused by leaks of flammable and explosive gases due to natural gas leaks, factory production accidents, etc. have occurred frequently. Therefore, in order to reduce the hazards and losses caused by leaks of hazardous chemicals, it is urgent to develop non-contact combustible gas leak detection technology in low-altitude environments, which can provide key information and data for on-site rescue personnel, improve emergency response efficiency, and maximize the protection of the lives and property of rescue personnel and surrounding people.

[0003] Since the gas leaked at the accident site is usually flammable and explosive or toxic and harmful, it is necessary to use non-contact detection methods during the detection and analysis process, and use spectral absorption technology, infrared thermal imaging, visible light imaging and other technologies to detect the gas in real time; in addition, the gas will diffuse or precipitate irregularly, so it is necessary to conduct multi-angle detection of the gas at the accident site to improve the detection and analysis effect and accuracy.

[0004] However, there are usually some problems when detecting hazardous chemical gases. With the development of science and technology, technicians in related fields have also made a lot of optimizations on the detection of hazardous chemical gases. In order to make a more accurate comparison, a Chinese patent with publication number CN115993428A discloses gas detection equipment for hazardous chemical production, including a stabilizing seat, a first adjustment device connected to the stabilizing seat, a top frame assembly connected to the first adjustment device, a detection device connected to the first adjustment device, a negative pressure drive device connected to the detection device, the detection device including a second adjustment device, the second adjustment device connected to the first adjustment device, and an air intake assembly connected to the second adjustment device for air intake detection.

[0005] When the above-mentioned prior art is in use, the height positions of the detection device and the air intake assembly are adjusted by the first adjustment device and the second adjustment device, and the gas collection position can be adjusted, and then the surrounding gas is collected in multiple directions and the gas is detected.

[0006] However, there are still some shortcomings in the above existing technologies in the process of detecting hazardous chemical gases: 1. Since hazardous chemical gases are easy to spread after leakage, the above-mentioned existing technologies cannot perform on-site detection of hazardous chemical gases at the accident site. It is necessary to collect gas first and then detect it. It is easy for the gas to spread but not be detected in time, so that the density of the collected gas is relatively reduced, which can easily lead to deviations in the detection results.

[0007] 2. Also, since hazardous chemical gases tend to diffuse or precipitate irregularly when leaking, the gas density at the same height is different. The above-mentioned prior art requires gas collection before detection. However, it is difficult to fully collect the gas by adjusting the height alone, and it is easy to fail to collect the diffused or precipitated gas, thereby affecting the detection accuracy and effect.

[0008] Therefore, based on the above-stated views, there is still room for improvement in the existing hazardous chemicals detection methods. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a non-contact gas detection device and detection system for hazardous chemical accident sites, and adopts the following technical solutions to achieve: In a first aspect, a non-contact gas detection device for a hazardous chemical accident site is provided, comprising a support, two fixing frames symmetrically distributed along the thickness direction of the support are installed on the upper end of the support, a top support plate is commonly provided on the upper ends of the two fixing frames, a controller, an infrared spectrometer and a differential spectrometer are installed on the upper end of the top support plate, the infrared spectrometer, the differential spectrometer and the controller are electrically connected, a control unit for adjusting the angle of the top support plate is installed on the support, the control unit comprises a linkage plate installed at the lower end of the top support plate, and a collection barrel for collecting on-site gas is provided on the upper end of the top support plate; A pin shaft is installed between the upper ends of the two fixed frames, and a linkage plate is rotatably sleeved on the outer wall of the pin shaft and is located between the two fixed frames. The linkage plate is a semicircular structure, and a plurality of annularly distributed fixed teeth are evenly installed on the outer wall of the linkage plate. The control unit also includes a circular groove opened inside the support, and a gear meshing with the fixed teeth is rotatably installed inside the circular groove. A driving motor is installed on the outer wall of the support through a motor seat, and the gear is sleeved on the output shaft of the driving motor.

[0010] As a preferred technical solution of the present invention, two grooves are symmetrically opened at the lower end of the support along the length direction, a support pad is provided on the top wall of the groove, a telescopic cylinder is installed at the lower end of the support pad, a bottom support plate is commonly installed at the lower ends of the two telescopic cylinders, and a plurality of universal wheels are installed at the lower end of the bottom support plate.

[0011] As a preferred technical solution of the present invention, arc-shaped sliding grooves are provided on both side walls in the thickness direction of the linkage plate, a stabilizing block that slides and docks in the arc-shaped sliding grooves is installed on the side of the fixed frame close to the linkage plate, and ribs are installed between both side walls in the width direction of the fixed frame and the support.

[0012] As a preferred technical solution of the present invention, a plurality of collecting barrels are equidistantly installed on both sides of the upper end of the top support plate in the width direction, and the collecting barrels are composed of a fixed barrel and a rotating barrel, wherein the fixed barrel is installed on the upper end of the top support plate, and a plurality of rotating barrels rotatably installed inside the fixed barrel are arranged on the upper end of the top support plate, and the side walls of the fixed barrel and the rotating barrel are provided with through openings connected to the outside, and a sealing plug extending to the interior of the rotating barrel is installed on the upper end of the fixed barrel.

[0013] As a preferred technical solution of the present invention, a filter screen is installed on the inner wall of the through-hole of the rotating cylinder, and a resistance pad that rotatably resists the inner wall of the fixed cylinder is installed on the outer wall of the rotating cylinder.

[0014] As a preferred technical solution of the present invention, a plurality of rotating cylinders are provided with a rotating shaft at the lower end through a connecting plate, a pulley is provided at the lower end of the rotating shaft after rotating through the top support plate, and a belt is provided on the outer wall of the plurality of pulleys; The outer wall of the belt is evenly installed with multiple equidistantly distributed transmission teeth. The lower end of the top support plate is provided with an installation groove, in which a positioning motor is arranged. The outer wall fixed sleeve of the output shaft at the lower end of the positioning motor is provided with a toothed wheel meshing with the transmission teeth.

[0015] As a preferred technical solution of the present invention, the outer wall of the pulley is provided with a plurality of annularly distributed toothed grooves, and a plurality of auxiliary teeth matching with the toothed grooves are installed at any position of the inner wall of the belt.

[0016] As a preferred technical solution of the present invention, a plurality of annularly distributed positioning grooves are provided at the lower end of the connecting plate, and a resistance block is installed on the inner wall of the positioning groove through an elastic telescopic plate. A plurality of limiting grooves corresponding to the positions of the positioning grooves are provided at the upper end of the top support plate, and the resistance block slides against the limiting grooves.

[0017] In a second aspect, a non-contact gas detection system for a hazardous chemical accident site is provided, the system further comprising: The infrared spectrum imaging acquisition system configured inside the infrared spectrum analyzer is used to collect infrared spectrum image data of the gas; A differential spectrum detection system configured inside the differential spectrum analyzer is used to obtain differential spectrum data of the gas; The IoT technology intelligent analysis system is connected to the infrared spectrum imaging acquisition system and the differential spectrum detection system to receive the collected data from both and transmit the data back to the command center through the wireless communication network; The command center is equipped with a data processing module to perform real-time analysis on the transmitted infrared spectral image data and differential spectral data, evaluate gas composition and concentration, and support emergency decision-making; User mobile terminals are used to receive gas analysis data and evaluation results in real time, making it easy for on-site personnel and command personnel to quickly obtain key information.

[0018] As a preferred technical solution of the present invention, it also includes a user terminal data sending module, which is connected to the user mobile terminal by a wireless communication network, and is connected to the processing module of the command center, for pushing the processed gas analysis data and evaluation results to the user mobile terminal in real time.

[0019] In summary, this application includes the following beneficial technical effects: 1. The present invention conducts on-site detection and sample collection of hazardous chemical gases in a non-contact manner, which can effectively prevent deviations in detection results caused by on-site gas diffusion due to untimely detection, and can avoid certain risks of contact between detection personnel and on-site gases, thereby ensuring the safety of the detection process.

[0020] 2. The present invention drives the top support plate to move circumferentially by rotating the linkage plate, and the top support plate drives the infrared spectrometer and the differential spectrometer to move synchronously. The detection angle can be adjusted according to the detection requirements, and the height of the infrared spectrometer and the differential spectrometer can be adjusted, so that the diffused gas can be detected in all directions from multiple angles, avoiding the influence of the detection accuracy due to the diffusion or precipitation of the gas on site, thereby ensuring the detection effect.

[0021] 3. The present invention controls the rotation of the rotating cylinder and transfers the gas inside it to the fixed cylinder, so that the on-site gas can be stored by the rotating cylinder and the fixed cylinder, which is convenient for bringing it back and conducting centralized detection; when detecting on-site gas, the gas at different positions after irregular diffusion and precipitation can be collected, thereby enhancing the detection accuracy and detection effect, and the on-site gas can be automatically collected to prevent the danger of manual collection when harmful or toxic gas leaks, thereby ensuring the safety of the detection process.

[0022] Fourth, the present invention can limit the connection plate and the rotating cylinder through the mutual cooperation between the resistance block and the limiting groove, so as to prevent the friction between the belt and the pulley from driving the pulley and the rotating cylinder to rotate, thereby ensuring that the belt controls multiple pulleys to rotate in sequence through auxiliary teeth and open different collection barrels in sequence, thereby facilitating the collection of gases in different directions, thereby further enhancing the detection effect of on-site gases.

[0023] 5. The present invention facilitates automatic detection of on-site gas or handheld operation of on-site gas detection by installing or disassembling the support and the bottom support plate. During automatic detection, the support and the bottom support plate can be installed to detect indoor or wide-area, high-density gas without manual operation, making the detection process safer. Handheld operation is convenient for detecting small-scale outdoor accidents or gases with a lower risk factor, so that adaptive adjustments can be made according to actual detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the internal structure of the support, fixing frame, top support plate and control unit of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the collection barrel of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure between the top support plate and the collecting barrel of the present invention.

[0029] Figure 5 It is a schematic diagram of the internal structure between the top support plate and the collecting barrel of the present invention.

[0030] Figure 6 The present invention Figure 5 A partial enlarged view of point A.

[0031] Figure 7 It is a schematic diagram of the structure among the pulley, belt and toothed wheel of the present invention.

[0032] Figure 8 It is a schematic diagram of the exploded structure between the support and the bottom support plate of the present invention.

[0033] Fig. 9 The present invention provides a flow chart of a non-contact gas detection system for hazardous chemicals accident sites.

[0034] In the figure, 1, support; 11, support pad; 12, telescopic cylinder; 13, bottom support plate; 14, universal wheel; 15, handle; 2, fixed frame; 3, top support plate; 4, controller; 5, infrared spectrometer; 6, differential spectrometer; 7, control unit; 71, linkage plate; 72, pin shaft; 73, fixed tooth; 74, gear; 75, drive motor; 76, arc slide; 77, stabilizing block; 78, rib plate; 8, collecting barrel; 81, fixed cylinder; 811, through-hole; 812, sealing plug; 82, rotating cylinder; 821, filter screen; 822, resistance pad; 823, connecting plate; 824, rotating shaft; 825, pulley; 826, belt; 827, transmission tooth; 828, positioning motor; 829, toothed wheel; 830, auxiliary tooth; 831, elastic telescopic plate; 832, resistance block. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-Figure 9 Embodiments of the present invention are described in detail.

[0036] The embodiment of the present application discloses a non-contact gas detection device and detection system for hazardous chemical accident sites. It should be noted that the present application is mainly used in the process of detecting gases at hazardous chemical accident sites. In terms of technical effect, it can detect on-site gases through an infrared spectrometer 5 and a differential spectrometer 6, and can perform multi-angle and all-round detection of the diffused gas to avoid affecting the detection accuracy due to the diffusion or precipitation of the on-site gases, thereby ensuring the detection effect. During the period, the on-site gases can be collected and brought back for centralized detection; especially when collecting on-site gases, multiple collection barrels 8 can be used to collect gases at different positions in turn, thereby enhancing the detection accuracy and detection effect; further, the present application can also install or disassemble the support 1 and the bottom support plate 13, so as to facilitate automatic detection of on-site gases or handheld detection of on-site gases, so as to make adaptive adjustments according to actual detection needs.

[0037] Example 1: Reference Figure 1 As shown, in the first aspect, the present application provides a non-contact gas detection device for hazardous chemical accident sites, including a support 1, two fixing frames 2 symmetrically distributed along the thickness direction of the support 1 are installed on the upper end, and a top support plate 3 is commonly provided on the upper ends of the two fixing frames 2. A controller 4, an infrared spectrometer 5 and a differential spectrometer 6 are installed on the upper end of the top support plate 3. The infrared spectrometer 5 and the differential spectrometer 6 are existing technologies and are used for remote detection of gas. The infrared spectrometer 5 and the differential spectrometer 6 are electrically connected to the controller 4. A control unit 7 for adjusting the angle of the top support plate 3 is installed on the support 1, and the control unit 7 includes a linkage plate 71 installed at the lower end of the top support plate 3. A collection barrel 8 for collecting on-site gas is provided on the upper end of the top support plate 3.

[0038] Furthermore, in this embodiment, two grooves are symmetrically provided at the lower end of the support 1 along the length direction, a support pad 11 is provided on the top wall of the groove, a telescopic cylinder 12 is installed at the lower end of the support pad 11, the telescopic cylinder 12 and the controller 4 are electrically connected, a bottom support plate 13 is commonly installed at the lower ends of the two telescopic cylinders 12, and a plurality of universal wheels 14 are installed at the lower end of the bottom support plate 13.

[0039] It should be noted that the controller 4 is a prior art, which is mainly used to control the start and stop of the infrared spectrometer 5, the differential spectrometer 6 and the telescopic cylinder 12. In addition, the universal wheel 14 used in this embodiment is preferably an electric universal wheel, and is electrically connected to the controller 4. Therefore, the present invention can be driven to move to a specified position by controlling the operation of the electric universal wheel.

[0040] In the specific implementation process, the universal wheel 14 is powered on and started by the controller 4, and the universal wheel 14 drives the present invention to move to the accident scene. Then the controller 4 powers on and starts the infrared spectrometer 5 and the differential spectrometer 6 to detect the gas at the accident scene. At the same time, the infrared spectrometer 5 and the differential spectrometer 6 are used to perform multi-angle and all-round detection of the gas at the scene. During this period, the controller 4 powers on and starts the telescopic cylinder 12, and the telescopic cylinder 12 moves the support 1, the fixing frame 2, the top support plate 3, the infrared spectrometer 5 and the differential spectrometer 6 upward or downward as a whole through the support pad 11, so as to adjust the height of the infrared spectrometer 5 and the differential spectrometer 6 according to actual detection needs, thereby further realizing all-round detection.

[0041] In addition, the on-site gas can be collected through the collection barrel 8 so that the gas can be brought back to the laboratory for centralized testing according to testing requirements.

[0042] Reference Figure 2 As shown, since hazardous chemical gases are prone to irregular diffusion or precipitation after leakage, in order to ensure the detection effect and accuracy of on-site gas, infrared spectrometer 5 and differential spectrometer 6 are required to detect on-site gas from different angles. Based on this, it is necessary to adjust the angles of top support plate 3, infrared spectrometer 5 and differential spectrometer 6. Specifically, in this embodiment, a pin shaft 72 is installed between the upper ends of the two fixing frames 2, and a linkage plate 71 is rotatably sleeved on the outer wall of the pin shaft 72 and is located between the two fixing frames 2. The linkage plate 71 is a semicircular structure, and a plurality of annularly distributed fixed teeth 73 are evenly installed on the outer wall of the linkage plate 71. The control unit 7 also includes a circular groove opened inside the support 1, and a gear 74 meshing with the fixed teeth 73 is rotatably installed inside the circular groove. A drive motor 75 is installed on the outer wall of the support 1 through a motor seat, and the gear 74 is fixedly sleeved on the output shaft of the drive motor 75. The drive motor 75 is electrically connected to the controller 4.

[0043] Furthermore, in this embodiment, arc-shaped grooves 76 are provided on both side walls in the thickness direction of the linkage plate 71, and a stabilizing block 77 that slides and docks in the arc-shaped grooves 76 is installed on the side of the fixed frame 2 close to the linkage plate 71, and ribs 78 are installed between both side walls in the width direction of the fixed frame 2 and the support 1. The ribs 78 can support the fixed frame 2, and the mutual cooperation between the stabilizing block 77 and the arc-shaped grooves 76 can support and limit the linkage plate 71, thereby preventing the linkage plate 71 from lacking stability during rotation and affecting the detection effect.

[0044] In the specific implementation process, the driving motor 75 is powered on and started through the controller 4, and the driving motor 75 drives the gear 74 to rotate. The gear 74 drives the linkage plate 71 to rotate in the opposite direction through the fixed tooth 73, so that the linkage plate 71 drives the top support plate 3 to move circumferentially along the pin shaft 72, and the top support plate 3 drives the infrared spectrometer 5 and the differential spectrometer 6 to move synchronously, and the detection angle can be adjusted according to the detection requirements, so that the diffused gas can be detected from multiple angles and in all directions, avoiding the impact of the detection accuracy due to the diffusion or precipitation of the on-site gas, thereby ensuring the detection effect.

[0045] Reference Figure 3 As shown, in order to ensure the accuracy of on-site gas detection, in this embodiment, the on-site gas can be detected and collected accordingly. Based on this, in this embodiment, multiple collecting barrels 8 are equidistantly installed on both sides of the upper end of the top support plate 3 in the width direction, and the collecting barrel 8 is composed of a fixed cylinder 81 and a rotating cylinder 82, wherein the fixed cylinder 81 is installed on the upper end of the top support plate 3, and the upper end of the top support plate 3 is provided with multiple rotating cylinders 82 rotatably installed inside the fixed cylinder 81, and the side walls of the fixed cylinder 81 and the rotating cylinder 82 are provided with through holes 811 connected to the outside, and the upper end of the fixed cylinder 81 is installed with a sealing plug 812 extending to the inside of the rotating cylinder 82, and the sealing plug 812 is used to close and open the upper ends of the fixed cylinder 81 and the rotating cylinder 82, so as to pull out the sealing plug 812 after on-site gas collection to take out the gas for detection.

[0046] In the initial state, the through openings 811 of the fixed cylinder 81 and the rotating cylinder 82 overlap, so that the inside of the rotating cylinder 82 is connected with the outside.

[0047] During the specific implementation process, while detecting the on-site gas, the on-site gas enters into the rotating cylinder 82 through the through-port 811, and then the rotating cylinder 82 is controlled to rotate so that the gas inside the rotating cylinder 82 is transferred to the fixed cylinder 81 while rotating. In this way, the on-site gas can be stored by the rotating cylinder 82 and the fixed cylinder 81, so that it is convenient to bring it back and conduct centralized detection. In addition, the present invention can collect gas from multiple directions when detecting on-site gas from multiple angles, so as to collect gas at different positions after irregular diffusion and precipitation, thereby enhancing the detection accuracy and detection effect.

[0048] It should be noted that, in the present embodiment, a filter screen 821 is installed on the inner wall of the through-hole 811 of the rotating cylinder 82, and external impurities can be filtered through the filter screen 821 to ensure that only on-site gas enters between the rotating cylinder 82 and the fixed cylinder 81, and a resistance pad 822 is installed on the outer wall of the rotating cylinder 82 to rotate with the inner wall of the fixed cylinder 81. The resistance pad 822 can compensate for the gap between the fixed cylinder 81 and the rotating cylinder 82 to prevent the gas stored between the fixed cylinder 81 and the rotating cylinder 82 from flowing out and affecting the subsequent detection effect.

[0049] Reference Figure 4 , Figure 5 and Figure 6 As shown, in order to facilitate the automatic collection of on-site gas, in this embodiment, the lower ends of multiple rotating cylinders 82 are all equipped with rotating shafts 824 through connecting plates 823, and the lower ends of the rotating shafts 824 are rotated through the top support plate 3 and then equipped with pulleys 825, and the outer walls of the multiple pulleys 825 are jointly sleeved with belts 826; the outer wall of the belt 826 is evenly installed with multiple equidistantly distributed transmission teeth 827, and the lower end of the top support plate 3 is provided with an installation groove, in which a positioning motor 828 is arranged, and the positioning motor 828 is electrically connected to the controller 4, and the outer wall of the output shaft at the lower end of the positioning motor 828 is fixedly sleeved with a toothed wheel 829 meshing with the transmission teeth 827.

[0050] In the specific implementation process, when the on-site gas is detected using the infrared spectrometer 5 and the differential spectrometer 6, after the on-site gas penetrates into the rotating cylinder 82, the positioning motor 828 is powered on and started through the controller 4, and the positioning motor 828 drives the toothed wheel 829 to rotate, and the toothed wheel 829 drives the belt 826 to move circumferentially through the transmission teeth 827, and the belt 826 drives the rotating cylinder 82 to rotate through the pulley 825 and the connecting plate 823, so that the rotating cylinder 82 stores the on-site gas inside it in the fixed cylinder 81, thereby realizing automatic collection of on-site gas without manual collection, preventing the danger of manual collection when harmful or toxic gas leaks, and thus ensuring the safety of the detection process.

[0051] Reference Figure 5 and Figure 7As shown, in order to further ensure the detection effect of on-site gas, it is necessary to collect on-site gas from different directions. Based on this, in this embodiment, multiple collection barrels 8 can be opened in sequence to collect on-site gas. Specifically, the outer wall of the pulley 825 is provided with multiple annular toothed grooves, and any position of the inner wall of the belt 826 is equipped with multiple auxiliary teeth 830 that match the toothed grooves. Before the detection, all rotating cylinders 82 are rotated and the fixed cylinder 81 is closed. When detecting on-site gas, the toothed wheel 829 drives any one of the pulleys 825 to rotate through the belt 826, and the pulley 825 drives the rotating cylinder 82 to rotate through the rotating shaft 824, so that the rotating cylinder 82 cooperates with its The external fixed cylinder 81 collects the gas, and then the belt 826 drives the rotating cylinder 82 to continue rotating through the pulley 825 and stores the collected gas in the fixed cylinder 81. During this period, the belt 826 and other pulleys 825 are in sliding contact, so that the other pulleys 825 cannot rotate, and then the other rotating cylinders 82 and the fixed cylinder 81 are in a closed state; thereby controlling the belt 826 to continue to move and open and close multiple rotating cylinders 82 in turn, so that when collecting on-site gas, the orientation can be adjusted to store on-site gas at different angles and orientations in different collection barrels 8, so as to facilitate the detection of different gases separately, which helps to improve the detection effect.

[0052] Reference Figure 6 As shown, in order to prevent the friction of the belt 826 from driving the rotating cylinder 82 to rotate arbitrarily and affecting the normal collection of gas when the belt 826 drives one of the pulleys 825 to rotate, the other pulleys 825 are driven by the friction of the belt 826 to drive the rotating cylinder 82 to rotate randomly, so in this embodiment, a plurality of annularly distributed positioning grooves are opened at the lower end of the connecting plate 823, and the inner wall of the positioning groove is installed with a resistance block 832 through an elastic expansion plate 831, and a plurality of limiting grooves corresponding to the position of the positioning groove are opened at the upper end of the top support plate 3, and the elastic expansion plate 831 has an elastic top contact force, so that the elastic expansion plate 831 always exerts an elastic force on the resistance block 832. The pushing force causes the resistance block 832 to slide against the limiting groove in the initial state, and the connection plate 823 can be limited by the mutual cooperation between the resistance block 832 and the limiting groove, thereby limiting the rotating cylinder 82, and preventing the friction between the belt 826 and the pulley 825 from driving the pulley 825 and the rotating cylinder 82 to rotate, thereby ensuring that the belt 826 controls multiple pulleys 825 to rotate in sequence through the auxiliary teeth 830 and open different collection barrels 8 in sequence, thereby facilitating the collection of gases in different directions, thereby further enhancing the detection effect of on-site gases.

[0053] Reference Figure 1 and Fig. 9As shown, in the second aspect, in order to facilitate the detection of hazardous chemicals through the above-mentioned non-contact gas detection device at the scene of hazardous chemicals accidents, the present application provides a non-contact gas detection system at the scene of hazardous chemicals accidents, the detection system includes an infrared spectrum imaging acquisition system configured inside the infrared spectrum analyzer 5, for collecting infrared spectrum image data of the gas; a differential spectrum detection system configured inside the differential spectrum analyzer 6, for obtaining differential spectrum data of the gas; an Internet of Things technology intelligent analysis system, connected to the infrared spectrum imaging acquisition system and the differential spectrum detection system, for receiving the collected data from both, and transmitting the data back to the command center through the wireless communication network; the command center is equipped with a data processing module for real-time analysis of the transmitted infrared spectrum image data and differential spectrum data, evaluating the gas composition and concentration, and supporting accident emergency decision-making; a user terminal data sending module, connected to the processing module of the command center, for pushing the processed gas analysis data and evaluation results to the user's mobile terminal in real time.

[0054] Among them, the infrared spectral imaging acquisition system uses switchable spectral filters to realize spectral imaging, and the infrared spectral imaging acquisition system is mainly composed of an infrared lens, a switchable infrared filter and a high-sensitivity infrared detector module, so as to facilitate rapid switching under different spectra, adapt to changing environments and different types of target gas detection, so as to enhance the detection effect of on-site gas.

[0055] In addition, the imaging signal-to-noise ratio of the differential spectral detection system is relatively high, and the subsequent processing belongs to the typical category of computational imaging. The use of modern digital image processing technology can obtain better imaging detection effects and a longer gas leak detection distance.

[0056] Furthermore, the detection system also includes a user mobile terminal, which is connected to the user terminal data sending module by a wireless communication network and is used to receive in real time the gas analysis data and evaluation results transmitted by the user terminal data transmission module, so as to facilitate on-site personnel and command personnel to quickly obtain key information.

[0057] Example 2: Reference Figure 8As shown, on the basis of Example 1, in order to facilitate the detection of gases in accidents of different scopes indoors and outdoors, in this embodiment, the support pad 11 is installed on the top wall of the groove in a detachable manner, so that the bottom support plate 13, the telescopic cylinder 12 and the support pad 11 can be disassembled as a whole from the support 1, and a handle 15 is installed at the bottom of the support 1. After the support 1 and the bottom support plate 13 are disassembled, the handle 15 is used to facilitate hand-held operation to detect the gas on site. At this time, it is convenient to detect gases in small-scale accidents outdoors or gases with a lower risk factor; when the support 1 and the bottom support plate 13 are installed, gases in the room or in a larger range or with a larger density can be detected without manual operation, so that the detection process is safer, so that adaptive adjustments can be made according to actual detection needs.

[0058] During operation: Step 1: First, install or disassemble the support 1 and the bottom support plate 13 according to the detection requirements. When the support 1 and the bottom support plate 13 are installed, they can detect gases in a large area or range with high density indoors without manual operation; when the support 1 and the bottom support plate 13 are disassembled, the handle 15 can be used for convenient hand-held operation to detect gases in small-scale outdoor accidents or gases with a low risk factor.

[0059] Step 2: When the support 1 and the bottom support plate 13 are installed, the universal wheel 14 is powered on and started through the controller 4, and the universal wheel 14 drives the present invention to move to the accident site. Then the controller 4 powers on the infrared spectrometer 5 and the differential spectrometer 6 to detect the gas at the accident site.

[0060] Step 3: The driving motor 75 is powered on and started through the controller 4. The driving motor 75 drives the gear 74 to rotate. The gear 74 drives the linkage plate 71 to rotate in the opposite direction through the fixed tooth 73, so that the linkage plate 71 drives the top support plate 3 to move circumferentially along the pin shaft 72. The top support plate 3 drives the infrared spectrometer 5 and the differential spectrometer 6 to move synchronously. The detection angle can be adjusted according to the detection requirements, so that the diffused gas can be detected from multiple angles and in all directions, thereby ensuring the detection effect.

[0061] Step 4: While detecting the on-site gas, the on-site gas enters the rotating cylinder 82 through the through-hole 811, and then the positioning motor 828 is powered on and started through the controller 4. The positioning motor 828 drives the toothed wheel 829 to rotate, and the toothed wheel 829 drives any one of the pulleys 825 to rotate through the belt 826. The pulley 825 drives the rotating cylinder 82 to rotate through the rotating shaft 824, so that the rotating cylinder 82 cooperates with the fixed cylinder 81 outside it to collect gas. Then the belt 826 drives the rotating cylinder 82 to continue rotating through the pulley 825 and stores the collected gas in the fixed cylinder 81. During this period, the belt 826 and the other pulleys 825 are in sliding contact, so that the other pulleys 825 cannot rotate, and then the other rotating cylinders 82 and the fixed cylinder 81 are in a closed state.

[0062] In this way, the belt 826 is controlled to move continuously and multiple rotating cylinders 82 are opened and closed in sequence, so that when collecting on-site gas, the orientation can be adjusted to store on-site gas at different angles and orientations in different collection barrels 8, so as to detect different gases separately, which helps to improve the detection effect.

[0063] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A non-contact gas detection device for a hazardous chemical accident site, comprising a support (1), wherein two fixing frames (2) symmetrically distributed along the thickness direction of the support (1) are mounted on the upper end thereof, a top support plate (3) is commonly arranged on the upper ends of the two fixing frames (2), a controller (4), an infrared spectrometer (5) and a differential spectrometer (6) are mounted on the upper end of the top support plate (3), the infrared spectrometer (5), the differential spectrometer (6) and the controller (4) are electrically connected, and the device is characterized in that: The support (1) is provided with a control unit (7) for adjusting the angle of the top support plate (3), the control unit (7) comprising a linkage plate (71) installed at the lower end of the top support plate (3), and a collection barrel (8) for collecting on-site gas is provided at the upper end of the top support plate (3); A pin shaft (72) is installed between the upper ends of the two fixing frames (2); a linkage plate (71) is rotatably sleeved on the outer wall of the pin shaft (72) and is located between the two fixing frames (2); the linkage plate (71) is a semicircular structure, and a plurality of annularly distributed fixing teeth (73) are evenly installed on the outer wall of the linkage plate (71); the control unit (7) further comprises a circular groove opened inside the support (1); a gear (74) meshing with the fixing teeth (73) is rotatably installed inside the circular groove; a driving motor (75) is installed on the outer wall of the support (1) through a motor seat, and the gear (74) is sleeved on the output shaft of the driving motor (75).

2. According to claim 1, a non-contact gas detection device for hazardous chemicals accident scene, characterized in that: The lower end of the support (1) is symmetrically provided with two grooves along the length direction, the top wall of the groove is provided with a support pad (11), the lower end of the support pad (11) is mounted with a telescopic cylinder (12), the lower ends of the two telescopic cylinders (12) are jointly mounted with a bottom support plate (13), and the lower end of the bottom support plate (13) is mounted with a plurality of universal wheels (14).

3. The non-contact gas detection device for hazardous chemical accident sites according to claim 1 is characterized in that: The two side walls of the linkage plate (71) in the thickness direction are provided with arc-shaped sliding grooves (76); a stabilizing block (77) slidably docked in the arc-shaped sliding grooves (76) is installed on one side of the fixed frame (2) close to the linkage plate (71); and rib plates (78) are installed between the two side walls of the fixed frame (2) in the width direction and the support (1).

4. The non-contact gas detection device for hazardous chemicals accident scene according to claim 1 is characterized in that: A plurality of collecting barrels (8) are equidistantly mounted on both sides of the upper end of the top support plate (3) in the width direction. The collecting barrels (8) are composed of a fixed barrel (81) and a rotating barrel (82), wherein the fixed barrel (81) is mounted on the upper end of the top support plate (3), and a plurality of rotating barrels (82) are rotatably mounted inside the fixed barrel (81) are arranged on the upper end of the top support plate (3). The side walls of the fixed barrel (81) and the rotating barrel (82) are both provided with through openings (811) communicating with the outside, and a sealing plug (812) extending to the inside of the rotating barrel (82) is installed on the upper end of the fixed barrel (81).

5. A non-contact gas detection device for hazardous chemicals accident scene according to claim 4, characterized in that: A filter screen (821) is installed on the inner wall of the through opening (811) of the rotating cylinder (82), and a resistance pad (822) for rotationally resisting against the inner wall of the fixed cylinder (81) is installed on the outer wall of the rotating cylinder (82).

6. A non-contact gas detection device for hazardous chemicals accident scene according to claim 5, characterized in that: The lower ends of the plurality of rotating cylinders (82) are all provided with rotating shafts (824) via connecting plates (823); the lower ends of the rotating shafts (824) rotate and pass through the top support plate (3) before being provided with pulleys (825); and the outer walls of the plurality of pulleys (825) are collectively sleeved with belts (826); The outer wall of the belt (826) is evenly mounted with a plurality of equally spaced transmission teeth (827); a mounting groove is provided at the lower end of the top support plate (3); a positioning motor (828) is provided in the mounting groove; a toothed wheel (829) meshing with the transmission teeth (827) is fixedly sleeved on the outer wall of the output shaft at the lower end of the positioning motor (828).

7. A non-contact gas detection device for hazardous chemicals accident scene according to claim 6, characterized in that: The outer wall of the pulley (825) is provided with a plurality of annularly distributed toothed grooves, and a plurality of auxiliary teeth (830) matching the toothed grooves are installed at any position on the inner wall of the belt (826).

8. The non-contact gas detection device for hazardous chemicals accident scene according to claim 6, characterized in that: The lower end of the connecting plate (823) is provided with a plurality of annularly distributed positioning grooves, the inner wall of the positioning groove is provided with a resistance block (832) via an elastic telescopic plate (831), and the upper end of the supporting plate (3) is provided with a plurality of limiting grooves corresponding to the positions of the positioning grooves, and the resistance block (832) slides against the limiting grooves.

9. A non-contact gas detection system for hazardous chemical accident sites, comprising the non-contact gas detection device for hazardous chemical accident sites as claimed in any one of claims 1 to 8, characterized in that: The system also includes: An infrared spectrum imaging acquisition system configured inside the infrared spectrum analyzer (5) is used to collect infrared spectrum image data of the gas; A differential spectrum detection system disposed inside the differential spectrum analyzer (6) is used to obtain differential spectrum data of the gas; The IoT technology intelligent analysis system is connected to the infrared spectrum imaging acquisition system and the differential spectrum detection system to receive the collected data from both and transmit the data back to the command center through the wireless communication network; The command center is equipped with a data processing module to perform real-time analysis on the transmitted infrared spectral image data and differential spectral data, evaluate gas composition and concentration, and support emergency decision-making; The user's mobile terminal is connected to the command center to receive gas analysis data and evaluation results in real time, making it easier for on-site personnel and command personnel to quickly obtain key information.

10. A non-contact gas detection system for hazardous chemicals accident sites according to claim 9, characterized in that: It also includes a user terminal data sending module, which is connected to the user mobile terminal via a wireless communication network, and is connected to the data processing module of the command center, for pushing processed gas analysis data and evaluation results to the user mobile terminal in real time.

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