Automatic monitoring device for gas leakage of power station tunnel group air duct

Abstract

The application relates to a power station tunnel group air duct gas leakage automatic monitoring device, which comprises a walking mechanism; a patrol support is arranged on the walking mechanism, and the patrol support is configured to provide rotation freedom in the horizontal direction and the pitching direction; a wind force monitoring mechanism is arranged on the patrol support and is used for being arranged towards an air duct arranged above a tunnel; an infrared imaging temperature monitoring mechanism is arranged on the patrol support and is used for being arranged towards the air duct; and a controller is arranged on the patrol support. A leakage point will cause local wind speed field distortion due to gas loss, the wind force monitoring mechanism can monitor and quickly lock the gas flow leakage point; the infrared imaging temperature monitoring mechanism can also receive infrared radiation of the air duct and convert the infrared radiation into a temperature field image, the leakage point will show a "low-temperature spot" or a "stability mutation zone" in the temperature field image due to temperature disturbance effect, so that the infrared imaging temperature monitoring mechanism can monitor and quickly lock the gas flow leakage point, and unmanned monitoring of the leakage point on the air duct is realized.

Description

Technical Field

[0001] This application relates to the technical field of automated monitoring of tunnels, and in particular to an automatic monitoring device for gas leakage in the ventilation duct of a power plant tunnel complex. Background Technology

[0002] A hydropower station tunnel complex typically refers to the entire underground cavern system of a hydropower station. Specifically, it comprises a complex underground space consisting of multiple interconnected tunnels, including water diversion tunnels, tailrace tunnels, access tunnels, underground powerhouses, outgoing line tunnels, and diversion tunnels. These tunnels are used to facilitate the normal operation and implementation of various activities at the hydropower station, but they suffer from significant drawbacks such as poor ventilation. To address this issue, ventilation ducts are generally used as temporary, dedicated ventilation systems for the tunnels, working in conjunction with fans to serve as the core delivery pipeline for the construction ventilation system.

[0003] However, ventilation ducts are mainly divided into two categories: flexible flexible ducts and rigid metal ducts. Considering factors such as installation stability and reliability, both types of ducts are made of thin and lightweight materials, so their structural strength is usually not high. They are prone to damage after prolonged exposure to internal wind pressure or after being accidentally bumped or scratched by external objects. Damage points will cause internal airflow leakage, resulting in energy loss in the duct and reducing its ventilation efficiency. Moreover, these leak points are usually not easily identifiable by visual inspection by inspection personnel. Summary of the Invention

[0004] Therefore, it is necessary to provide an automatic gas leakage monitoring device for ventilation ducts in power plant tunnel groups to address the problems of energy loss caused by internal airflow leakage, reduced ventilation efficiency of ventilation ducts, and difficulty in visually identifying leakage points.

[0005] This application proposes an automatic monitoring device for gas leakage in the ventilation duct of a power plant tunnel complex, comprising:

[0006] A walking mechanism, configured to move autonomously;

[0007] Inspection support, which is mounted on the traveling mechanism, is configured to provide rotational degrees of freedom in the horizontal and pitch directions;

[0008] A wind monitoring mechanism is mounted on the inspection support and is positioned facing the ventilation duct installed above the tunnel.

[0009] An infrared imaging temperature monitoring mechanism, wherein the infrared imaging temperature monitoring mechanism is mounted on the inspection support and is oriented towards the air duct; and

[0010] The controller is mounted on the inspection support and is electrically connected to both the wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism.

[0011] The automatic gas leakage monitoring device for the ventilation ducts in the power plant tunnel complex of this solution utilizes the autonomous movement provided by the traveling mechanism to allow the monitoring device to move autonomously along the tunnel. During this process, because the relative position of the monitoring device to the ventilation ducts installed above the tunnel is constantly changing, the inspection support provides horizontal and vertical rotational degrees of freedom to the wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism. This ensures that the monitoring points of the wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism can be accurately aligned with various parts of the ventilation duct in real time. Furthermore, when the ventilation duct is operating normally, the internal airflow flows uniformly along the axial direction of the ventilation duct. The wind speed distribution is stable, with no areas of abrupt temperature changes. However, when a localized damage occurs in the ventilation duct, creating a leak, the loss of gas causes distortion in the local wind speed field, allowing the wind monitoring agency to detect and quickly locate the leak. Simultaneously, the infrared imaging temperature monitoring agency receives the infrared radiation from the ventilation duct and converts it into a temperature field image. A normally functioning ventilation duct exhibits a uniform or stable gradient temperature distribution on its surface, while a leak will appear as a "low-temperature spot" or "stability abrupt change band" in the temperature field image due to temperature disturbances, enabling the infrared imaging temperature monitoring agency to detect and quickly locate the leak. In summary, given the characteristics of power plant tunnel groups—numerous tunnels, long individual tunnel lengths, dense ventilation duct layout, and complex environment—extremely high requirements are placed on the coverage, positioning accuracy, and reliability of gas leak monitoring. This solution combines the wind monitoring agency with the infrared imaging temperature monitoring agency to achieve integrated monitoring with "data complementarity, functional synergy, and scenario adaptation," avoiding monitoring blind spots and enabling unmanned intelligent monitoring of potential leak points on the ventilation duct.

[0012] The technical solution of this application will be further described below:

[0013] In one embodiment, the walking mechanism includes a walking body, a power source, and a walking execution module. The power source and the walking execution module are respectively mounted on the walking body, and the power source is connected to the walking execution module to drive the walking execution module to rotate relative to the ground, thereby realizing the movement of the walking mechanism.

[0014] In one embodiment, the walking execution module includes a drive wheel row and a walking track, the drive wheel row being connected to the power source, and the walking track being fitted onto the driving periphery of the drive wheel row.

[0015] In one embodiment, the walking mechanism includes a central controller, a first side distance sensor, a second side distance sensor, and a visual navigator. The central controller is mounted on the walking body. The first side distance sensor and the second side distance sensor are respectively mounted on both sides of the walking body in the width direction and are electrically connected to the central controller. The visual navigator is mounted on the front side of the walking body and is electrically connected to the central controller.

[0016] In one embodiment, the inspection support includes a base and a horizontal rotation module. The base is mounted on the walking mechanism, the horizontal rotation module is mounted on the base, and the wind monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the horizontal rotation module.

[0017] In one embodiment, the horizontal rotation module includes a fixed bracket, a horizontal actuator, and a movable bracket. The fixed bracket has a connected receiving cavity and an extension hole. The horizontal actuator is vertically installed in the receiving cavity, and the rotation drive shaft of the horizontal actuator passes through the extension hole and is connected to the movable bracket to drive the movable bracket to rotate circumferentially in the horizontal direction relative to the fixed bracket.

[0018] The wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the movable support.

[0019] In one embodiment, the horizontal rotation module further includes a plurality of rotating supports. The fixed support has a first mounting surface close to the movable support, and the movable support has a second mounting surface close to the fixed support. The first mounting surface and / or the second mounting surface are recessed to form an annular limiting groove that extends to adapt to the rotation direction of the movable support. The plurality of rotating supports are rotatably arranged side by side in the annular limiting groove.

[0020] In one embodiment, the inspection support further includes a pitch rotation module, which is mounted on the movable support, and the wind monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the pitch rotation module.

[0021] In one embodiment, the pitch rotation module includes a support frame, a drive motor, a transmission gear set, and a drive gear. The drive motor is mounted on the support frame, the transmission gear set is rotatably mounted on the support frame and connected to the drive motor, and the drive gear is rotatably mounted on the support frame and meshes with the transmission gear.

[0022] A support arm is fixed on the drive gear, and a support plate is connected to the support arm. The wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side on the support plate.

[0023] In one embodiment, the automatic gas leakage monitoring device for the ventilation duct of the power station tunnel group further includes an alarm, which is installed on the traveling mechanism and electrically connected to the controller. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram illustrating the working status of the automatic gas leakage monitoring device for the ventilation duct of a tunnel group as described in one embodiment, inside the tunnel.

[0027] Figure 2 for Figure 1 A structural diagram from a left-hand perspective.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Automatic gas leakage monitoring device for ventilation ducts in power plant tunnel complex; 10. Walking mechanism; 11. Walking body; 12. Walking execution module; 121. Drive wheel row; 122. Walking track; 13. First side distance sensor; 14. Second side distance sensor; 15. Visual navigator; 20. Inspection support; 21. Horizontal rotation module; 22. Pitch rotation module; 30. Wind monitoring mechanism; 40. Infrared imaging temperature monitoring mechanism; 200. Tunnel; 300. Ventilation duct; 310. Leakage point. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 This is a schematic diagram of the working state of an automatic gas leakage monitoring device 100 for a power plant tunnel ventilation duct, located inside the tunnel 200, to monitor the leakage point 310 of the ventilation duct 300.

[0037] Please continue reading. Figure 1 and Figure 2 For example, the monitoring device (hereinafter referred to as the automatic monitoring device 100 for gas leakage in the ventilation duct of the power station tunnel group) includes a walking mechanism 10, an inspection support 20, a wind monitoring mechanism 30, an infrared imaging temperature monitoring mechanism 40, and a controller.

[0038] The traveling mechanism 10 is configured to move autonomously, enabling the monitoring device to travel along the tunnel 200 and automatically monitor the ventilation duct 300.

[0039] The inspection support 20 is mounted on the traveling mechanism 10, and is configured to provide rotational freedom in both the horizontal and pitch directions. A wind monitoring mechanism 30 is mounted on the inspection support 20 and is positioned facing the ventilation duct 300 installed above the tunnel 200; an infrared imaging temperature monitoring mechanism 40 is mounted on the inspection support 20 and is positioned facing the ventilation duct 300; a controller is mounted on the inspection support 20 and is electrically connected to both the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40.

[0040] Typically, the ventilation duct 300 installed above the tunnel 200 (i.e., near the top wall of the tunnel 200, usually using a gantry for installation) is a cylindrical structure. This allows the inner wall of the ventilation duct 300 to have a smooth arc surface, reducing airflow resistance. Therefore, potential leakage points 310 on the side wall of the ventilation duct 300 may be randomly distributed at different locations on the arc surface. Thus, the inspection support 20 is provided to offer the wind power monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 rotational freedom in both horizontal and vertical directions, ensuring accurate detection of different locations on the ventilation duct 300 and guaranteeing effective monitoring.

[0041] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: When the automatic gas leakage monitoring device 100 of the power station tunnel group ventilation duct of this solution is in use, with the help of the autonomous movement force provided by the walking mechanism 10, the monitoring device can move autonomously along the tunnel 200; during this process, since the relative position of the monitoring device and the ventilation duct 300 installed above the tunnel 200 changes constantly, the inspection support 20 can provide the wind power monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 with rotational degrees of freedom in the horizontal and pitch directions, so that the monitoring parts of the wind power monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 can be aligned with various parts of the ventilation duct 300 in real time and accurately.

[0042] Based on this, when the duct 300 is working normally, the internal airflow flows uniformly along the axial direction of the duct 300, the wind speed distribution is stable, and there are no areas of temperature change. However, when the duct 300 is partially damaged and forms an airflow leakage point 310, the leakage point 310 will cause local wind speed field distortion due to gas loss, which allows the wind monitoring mechanism 30 to detect and quickly locate the airflow leakage point 310. At the same time, the infrared imaging temperature monitoring mechanism 40 will also receive the infrared radiation of the duct 300 and convert it into a temperature field image. The surface temperature of the normally working duct 300 is uniformly distributed or has a stable gradient distribution, while the leakage point 310 will show "low temperature spots" or "stability change bands" in the temperature field image due to temperature disturbance effects, which allows the infrared imaging temperature monitoring mechanism 40 to detect and quickly locate the airflow leakage point 310. In summary, given the characteristics of the power station tunnel group 200, such as the large number of tunnels 200, the long length of each tunnel, the dense arrangement of ventilation ducts 300, and the complex environment, extremely high requirements are placed on the coverage, positioning accuracy, and reliability of gas leak monitoring. This solution combines the wind power monitoring mechanism 30 with the infrared imaging temperature monitoring mechanism 40 to achieve integrated monitoring with "data complementarity, functional synergy, and scenario adaptation," avoiding monitoring blind spots and realizing unmanned intelligent monitoring of potential leak points 310 on the ventilation ducts 300.

[0043] Please continue reading. Figure 1 and Figure 2 Based on the above embodiments, in a specific embodiment, the walking mechanism 10 includes a walking body 11, a power source and a walking execution module 12. The power source and the walking execution module 12 are respectively installed on the walking body 11, and the power source is connected to the walking execution module 12 to drive the walking execution module 12 to rotate relative to the ground, thereby realizing the movement of the walking mechanism 10.

[0044] The walking body 11 is the main component of the walking mechanism 10, serving to house the integrated power source and the walking execution module 12. For example, the walking body 11 can adopt one of the following: frame structure, box structure, etc., which can be flexibly selected according to actual needs.

[0045] By outputting driving force to the walking execution module 12 through a power source, the walking execution module 12 can operate relative to the ground. The walking mechanism 10 can move by the friction generated between it and the ground, thus meeting the need for the monitoring device to move autonomously within the tunnel 200. For example, the power source can be a power device capable of outputting rotational driving force, including but not limited to an engine module, etc.

[0046] Please continue reading. Figure 1 and Figure 2 In one optional embodiment, the walking execution module 12 includes a drive wheel row 121 and a walking track 122. The drive wheel row 121 is connected to a power source for transmission, and the walking track 122 is fitted onto the driving periphery of the drive wheel row 121. The power source first outputs rotational driving force to the drive wheel row 121 to drive the drive wheel row 121 to rotate; the drive wheel row 121 then drives the walking track 122 to rotate. The walking track 122 has a large contact area with the ground of the tunnel 200 and high friction, which can greatly improve mobility and reliability. Moreover, the ground inside the tunnel 200 is often uneven, with many gravel, mud or water accumulation. The walking track 122 can effectively distribute the weight of the equipment by contacting the ground through the wide track, avoiding sinking into soft mud or getting stuck in the gaps of gravel. At the same time, the wide base and low center of gravity design of the tracked walking execution module 12 can significantly improve lateral stability. Even when turning or passing through sloping ground, the risk of rollover is much lower than that of wheeled structures, which greatly improves the passability of the walking execution module 12 inside the tunnel 200.

[0047] Please continue reading. Figure 2 Furthermore, in another embodiment, the walking mechanism 10 includes a central controller, a first side distance sensor 13, a second side distance sensor 14, and a visual navigator 15. The central controller is mounted on the walking body 11. The first side distance sensor 13 and the second side distance sensor 14 are respectively mounted on both sides of the walking body 11 in the width direction and are electrically connected to the central controller. The visual navigator 15 is mounted on the front side of the walking body 11 and is electrically connected to the central controller.

[0048] During the movement of the walking mechanism 10 within the tunnel 200, the first side distance sensor 13 and the second side distance sensor 14 continuously detect the distances between the left and right sides of the walking body 11 and the side walls of the tunnel 200, and transmit the detected distance data back to the central controller in real time to control the direction of travel of the walking mechanism 10 and prevent the walking mechanism 10 from deviating from its direction and colliding with the tunnel 200. For example, the first side distance sensor 13 and the second side distance sensor 14 can be any one of, but not limited to, laser sensors, infrared sensors, etc.

[0049] The visual navigator 15, installed at the front of the walking body 11, can detect the road conditions ahead in real time. When encountering deep potholes, large rocks, or other foreign objects or dangers, it can control the walking mechanism 10 to avoid obstacles, ensuring that the monitoring device can safely and reliably continue to travel along the tunnel 200. For example, the visual navigator 15 can be, but is not limited to, a visual camera or visual camera, etc., which can be flexibly selected according to actual needs.

[0050] Please continue reading. Figure 1 and Figure 2 Furthermore, based on any of the above embodiments, the inspection support 20 includes a base and a horizontal rotation module 21. The base is mounted on the traveling mechanism 10, and the horizontal rotation module 21 is mounted on the base. The wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 are arranged side-by-side and spaced apart on the horizontal rotation module 21. The base is connected to the traveling body 11 of the traveling mechanism 10, so that the inspection support 20 is integrally assembled onto the traveling mechanism 10. The wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 are mounted on the horizontal rotation module 21 and can rotate flexibly in the horizontal direction under the drive of the horizontal rotation module 21, so that the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 can more effectively cover the wind duct 300 and accurately capture the leakage point 310, thereby improving the monitoring accuracy and reliability.

[0051] For example, the horizontal rotation module 21 can provide a rotation range of ±180° (i.e., 360° circumferentially), which can more completely and effectively cover all parts of the air duct 300 and avoid monitoring blind spots on the air duct 300.

[0052] More specifically, in an optional embodiment, the horizontal rotation module 21 includes a fixed bracket, a horizontal actuator, and a movable bracket. The fixed bracket has a connected receiving cavity and an extension hole. The horizontal actuator is vertically installed in the receiving cavity, and the rotation drive shaft of the horizontal actuator passes through the extension hole and is connected to the movable bracket to drive the movable bracket to rotate circumferentially in the horizontal direction relative to the fixed bracket.

[0053] The wind monitoring unit 30 and the infrared imaging temperature monitoring unit 40 are arranged side by side on the movable support.

[0054] Installing the horizontal actuator within the receiving cavity allows for concealed installation and a compact assembly with the mounting bracket, improving the overall structural compactness of the horizontal rotation module 21 and reducing installation space requirements. For example, the horizontal actuator can be a motor, rotary cylinder, or other device capable of directly outputting rotational power, or capable of converting intermittent linear reciprocating power into rotational power to drive equipment.

[0055] The protruding hole is used to allow at least part of the rotary drive shaft of the horizontal actuator to protrude from the fixed bracket, so as to facilitate assembly and connection with the movable bracket, so as to output rotary drive force to the movable bracket, drive the movable bracket to rotate horizontally relative to the fixed bracket, and ultimately drive the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 to rotate in the horizontal direction, so as to meet the needs of monitoring potential leakage points 310 in different parts of the wind tunnel 300.

[0056] Furthermore, based on the above embodiments, the horizontal rotation module 21 also includes multiple rotating supports. The fixed support has a first mounting surface close to the movable support, and the movable support has a second mounting surface close to the fixed support. The first and / or second mounting surfaces are recessed to form an annular limiting groove that extends to adapt to the rotation direction of the movable support. The multiple rotating supports are rotatably arranged side by side within the annular limiting groove. By installing multiple rotating supports arranged side by side and rotatable between the first and second mounting surfaces, horizontal rotational support of the movable support can be achieved, reducing the rotational frictional resistance between the movable support and the fixed support, improving the smoothness and stability of the movable support's rotation, and helping to reduce the load on the horizontal actuator, thereby reducing energy consumption and improving operational economy.

[0057] The annular limiting groove formed on the first and / or second assembly surfaces is used to constrain the driving working position of the rotating support body, preventing it from wandering off course and becoming misaligned, or even falling off between the first and second assembly surfaces. For example, the rotating support body can be any of, but not limited to, ball bearings, cylindrical rollers, etc., and can be flexibly selected according to actual needs.

[0058] Furthermore, based on any of the above embodiments, the inspection support 20 also includes a pitch rotation module 22, which is mounted on a movable bracket. The wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 are arranged side-by-side and spaced apart on the pitch rotation module 22. The pitch rotation module 22 is used to drive the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 to perform pitch rotation, thereby expanding the monitoring range and achieving full coverage monitoring of the wind duct 300, avoiding any blind spots in monitoring.

[0059] It should be noted that in actual monitoring work, the horizontal rotation module 21 and the pitch rotation module 22 can work separately and sequentially (for example, the horizontal rotation module 21 moves first and the pitch rotation module 22 moves later; or the pitch rotation module 22 moves first and the horizontal rotation module 21 moves later); or the horizontal rotation module 21 and the pitch rotation module 22 can work simultaneously. The specific settings can be flexibly configured according to the specific needs, and no specific limitations are made here.

[0060] For example, in one embodiment, the pitch rotation module 22 includes a support frame, a drive motor, a transmission gear set, and a drive gear. The drive motor is mounted on the support frame, the transmission gear set is rotatably mounted on the support frame and connected to the drive motor, and the drive gear is rotatably mounted on the support frame and meshes with the transmission gear.

[0061] A support arm is fixed on the drive gear, and a support plate is connected to the support arm. The wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 are arranged side by side on the support plate.

[0062] Therefore, the drive motor drives the drive gear to rotate upwards or downwards in the vertical plane through the transmission gear set. This, in turn, drives the support plate to rotate up and down via the support arm, thereby adjusting the pitch monitoring angle of the wind power monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40. The power transmission of the gear transmission module is smooth and precise, effectively supporting the weight of the wind power monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 without slippage, ensuring the accuracy of the monitoring results.

[0063] Optionally, the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 can be installed on the support plate by at least one of the following methods, including but not limited to threaded connection, adhesive, magnetic connection, and snap-fit ​​connection, and can be flexibly selected according to actual needs.

[0064] It should be noted that the wind monitoring mechanism 30 and the infrared imaging temperature monitoring mechanism 40 can adopt mature products in the existing technology. For example, the wind monitoring mechanism 30 includes at least a wind speed sensor capable of detecting wind speed changes; the infrared imaging temperature monitoring mechanism 40 includes at least an infrared thermal imaging temperature sensor capable of sensing infrared radiation and thus identifying temperature changes.

[0065] Furthermore, based on any of the above embodiments, the automatic gas leakage monitoring device 100 for the ventilation duct of the power station tunnel complex also includes an alarm (not shown in the figure), which is installed on the traveling mechanism 10 and electrically connected to the controller. After accurately detecting the leakage point 310 on the ventilation duct 300, the wind monitoring mechanism 30 and / or the infrared imaging temperature monitoring mechanism 40 will send a signal to the controller, which will then issue a command to the alarm to provide an alarm prompt, informing construction personnel or inspection personnel to intervene and remedy the leakage point 310 of the ventilation duct 300 in a timely manner.

[0066] Optionally, the alarm can be any one of the following: sound alarm, light alarm, sound and light alarm, vibration alarm, etc.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An automatic monitoring device for gas leakage in the ventilation duct of a power station tunnel complex, characterized in that, include: A walking mechanism, configured to move autonomously; Inspection support, which is mounted on the traveling mechanism, is configured to provide rotational degrees of freedom in the horizontal and pitch directions; A wind monitoring mechanism is mounted on the inspection support and is positioned facing the ventilation duct installed above the tunnel. An infrared imaging temperature monitoring mechanism, wherein the infrared imaging temperature monitoring mechanism is mounted on the inspection support and is oriented towards the air duct; and The controller is mounted on the inspection support and is electrically connected to both the wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism.

2. The automatic gas leakage monitoring device for the ventilation duct of a power station tunnel group according to claim 1, characterized in that, The walking mechanism includes a walking body, a power source, and a walking execution module. The power source and the walking execution module are respectively mounted on the walking body, and the power source is connected to the walking execution module to drive the walking execution module to rotate relative to the ground, thereby realizing the movement of the walking mechanism.

3. The automatic gas leakage monitoring device for the ventilation duct of a power station tunnel group according to claim 2, characterized in that, The walking execution module includes a drive wheel row and a walking track. The drive wheel row is connected to the power source, and the walking track is fitted onto the driving periphery of the drive wheel row.

4. The automatic gas leakage monitoring device for the ventilation duct of a power station tunnel group according to claim 2, characterized in that, The walking mechanism includes a central controller, a first side distance sensor, a second side distance sensor, and a visual navigator. The central controller is mounted on the walking body. The first side distance sensor and the second side distance sensor are respectively mounted on both sides of the walking body in the width direction and are electrically connected to the central controller. The visual navigator is mounted on the front side of the walking body and is electrically connected to the central controller.

5. The automatic gas leakage monitoring device for the ventilation duct of a power station tunnel group according to claim 1, characterized in that, The inspection support includes a base and a horizontal rotating module. The base is mounted on the walking mechanism, and the horizontal rotating module is mounted on the base. The wind monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the horizontal rotating module.

6. The automatic gas leakage monitoring device for ventilation ducts in power plant tunnels according to claim 5, characterized in that, The horizontal rotation module includes a fixed bracket, a horizontal actuator, and a movable bracket. The fixed bracket has a connected receiving cavity and an extension hole. The horizontal actuator is vertically installed in the receiving cavity, and the rotation drive shaft of the horizontal actuator passes through the extension hole and is connected to the movable bracket to drive the movable bracket to rotate circumferentially in the horizontal direction relative to the fixed bracket. The wind power monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the movable support.

7. The automatic gas leakage monitoring device for ventilation ducts in power plant tunnels according to claim 6, characterized in that, The horizontal rotation module further includes multiple rotating supports. The fixed support has a first mounting surface close to the movable support, and the movable support has a second mounting surface close to the fixed support. The first mounting surface and / or the second mounting surface are recessed to form an annular limiting groove that extends to adapt to the rotation direction of the movable support. The multiple rotating supports are rotatably arranged side by side in the annular limiting groove.

8. The automatic gas leakage monitoring device for the ventilation duct of a power station tunnel group according to claim 7, characterized in that, The inspection support also includes a pitch and rotation module, which is mounted on the movable support. The wind monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side at intervals on the pitch and rotation module.

9. The automatic gas leakage monitoring device for ventilation ducts in power plant tunnels according to claim 8, characterized in that, The pitch and rotation module includes a support frame, a drive motor, a transmission gear set, and a drive gear. The drive motor is mounted on the support frame, the transmission gear set is rotatably mounted on the support frame and connected to the drive motor, and the drive gear is rotatably mounted on the support frame and meshes with the transmission gear. A support arm is fixed on the drive gear, and a support plate is connected to the support arm. The wind monitoring mechanism and the infrared imaging temperature monitoring mechanism are arranged side by side on the support plate.

10. The automatic gas leakage monitoring device for ventilation ducts in power plant tunnels according to claim 1, characterized in that, The automatic gas leakage monitoring device for the ventilation duct of the power station tunnel group also includes an alarm, which is installed on the traveling mechanism and electrically connected to the controller.

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