Environment monitoring device for tunnel safety

Abstract

The utility model provides an environment monitoring device for tunnel safety, which comprises a shell, an air inlet flow channel, a semiconductor detection unit, a control panel and a power supply module, the outer wall of the air inlet flow channel is in a circular truncated cone shape and can gather and accelerate air flow, so that the semiconductor detection unit can obtain gas data more efficiently and accurately, and the detection efficiency and sensitivity are improved; in the filter piece connected with the air inlet flow channel, the filter screen can intercept impurities, pollution to the detection unit, influence on result accuracy and reduction of element loss are avoided, and the threaded connection of the connecting cylinder facilitates maintenance; the anti-vibration pad at the bottom of the shell supports the air inlet channel, external vibration influence is reduced, looseness of internal components is reduced, and stable work of the device is guaranteed; the warning lamp is electrically connected with the controller and the like, and warning signals can be sent out in time when abnormity is detected, so that rapid processing is facilitated, and the early warning capacity is improved. According to the device, efficient and accurate detection, stable operation and timely early warning are realized, and the tunnel safety monitoring level is improved.

Description

An environmental monitoring device for tunnel safety Technical Field

[0001] This utility model relates to the field of tunnel safety environmental monitoring technology, and in particular to an environmental monitoring device for tunnel safety. Background Technology

[0002] As a crucial component of transportation infrastructure, environmental safety monitoring of tunnels is vital for ensuring traffic safety. The tunnel environment has unique characteristics. On one hand, vehicle exhaust releases various harmful gases (such as carbon monoxide and nitrogen oxides) along with dust particles. Excessive concentrations of these pollutants can lead to safety accidents or harm to human health. On the other hand, the relatively enclosed tunnel space generates continuous vibrations from vehicle movement and equipment operation, which may cause loosening of internal components of monitoring devices, reduced detection accuracy, or even malfunction. Traditional air intake channel designs are simple, and airflow entering the device may suffer from unstable flow velocity and poor convergence, preventing the semiconductor detection unit from quickly and accurately acquiring gas samples, thus affecting the timeliness and reliability of the detection results. Summary of the Invention

[0003] In view of this, the technical problem to be solved by this utility model is: how to provide an environmental monitoring device for tunnel safety to improve the reliability and stability of air intake delivery in the air intake duct.

[0004] To achieve the above objectives, this utility model proposes an environmental monitoring device for tunnel safety, which includes a housing, an air intake channel, a semiconductor detection unit, a control board, and a power supply module. The semiconductor detection unit, the control board, and the power supply module are disposed inside the housing, and the semiconductor detection unit and the power supply module are electrically connected to the control board.

[0005] The air intake channel is disposed on the side wall of the housing, and the side wall of the housing is provided with mounting holes for mounting the air intake channel. The interior of the air intake channel forms a cavity and is connected to the interior of the housing. The end of the air intake channel facing the interior of the housing is arranged corresponding to the semiconductor detection unit. External airflow enters the interior of the housing through the air intake channel and acts on the semiconductor detection unit.

[0006] A filter element is connected to the air intake channel. The filter element includes a filter screen and a connecting cylinder. The filter screen is disposed at the end of the connecting cylinder. The connecting cylinder is threadedly connected to the inner wall of the cavity of the air intake channel. The connecting cylinder is in communication with the interior of the housing.

[0007] A vibration damping pad is provided at the bottom of the housing, and the vibration damping pad supports the outer wall of the air intake channel.

[0008] Furthermore, it also includes a warning light, which is disposed on the housing and electrically connected to the controller and the power supply module.

[0009] Furthermore, the filter screen abuts against the end of the air intake channel away from the housing.

[0010] Furthermore, the axis of the connecting cylinder is collinear with the axis of the air intake channel.

[0011] Furthermore, the outer wall of the air intake channel is shaped like a frustum, and the outer diameter of the outer wall of the air intake channel gradually decreases in the direction toward the interior of the housing.

[0012] Compared with related technologies, the environmental monitoring device for tunnel safety proposed in this utility model has the following advantages:

[0013] (1) The unique design of the air intake channel ensures the high efficiency and accuracy of airflow detection. Its outer wall is truncated cone-shaped, and the outer diameter gradually decreases along the direction towards the inside of the shell. This structure can converge and accelerate the external airflow, allowing the airflow to enter the shell more smoothly through the air intake channel and act on the semiconductor detection unit, thereby improving detection efficiency and sensitivity, and ensuring that relevant data on the environmental gas in the tunnel can be obtained in a timely and accurate manner.

[0014] (2) The filter element connected to the inlet air passage effectively purifies the detection airflow. The filter element consists of a filter screen and a connecting cylinder. The filter screen abuts against the end of the inlet air passage away from the housing, intercepting dust, particulate matter, and other impurities in the airflow. This prevents these impurities from entering the housing and contaminating the semiconductor detection unit, thus affecting the accuracy of the detection results. It also reduces the wear and tear on the detection unit caused by impurities, extending the service life of the device. The connecting cylinder is threaded to the inner wall of the inlet air passage cavity, facilitating the disassembly and replacement of the filter screen and improving the convenience of device maintenance.

[0015] (2) The vibration damping pads installed at the bottom of the housing play a good role in vibration damping and buffering. The vibration damping pads support the outer wall of the air intake channel, which can effectively reduce the impact of external vibrations such as vehicle driving in the tunnel on the device, reduce problems such as loosening and displacement of internal components caused by vibration, ensure that the device can still work stably in the vibration environment, and improve the structural stability and reliability of the device.

[0016] (3) A warning light is installed on the housing and is electrically connected to the controller and power supply module. When the semiconductor detection unit detects that the ambient gas parameters in the tunnel exceed the set threshold, the controller can control the warning light to issue a warning signal, promptly reminding relevant personnel that an abnormal situation has occurred in the tunnel, so that corresponding measures can be taken quickly. This improves the timeliness and early warning capability of tunnel safety monitoring and provides a stronger guarantee for the safe operation of the tunnel.

[0017] This environmental monitoring device, by optimizing the airflow detection path, setting up filtering and vibration reduction structures, and adding warning functions, has achieved efficient and accurate detection of ambient gases in tunnels, stable and reliable operation of the device, and timely early warning of abnormal situations, significantly improving the level and effectiveness of tunnel safety monitoring. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of an environmental monitoring device for tunnel safety in an embodiment of this utility model;

[0019] Figure 2 is a cross-sectional structural diagram of an environmental monitoring device for tunnel safety according to an embodiment of the present invention.

[0020] Figure 3 is a schematic diagram of the electrical connection of an environmental monitoring device for tunnel safety in an embodiment of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Please refer to Figures 1-3. This utility model proposes an environmental monitoring device for tunnel safety, which includes a housing 11, an air intake duct 12, a semiconductor detection unit 13, a control board 14, and a power supply module 15. The semiconductor detection unit 13, the control board 14, and the power supply module 15 are disposed inside the housing 11, and the semiconductor detection unit 13 and the power supply module 15 are electrically connected to the control board 14. A top cover is provided on the top of the housing 11 to seal the internal cavity of the housing 11.

[0023] An air intake channel 12 is disposed on the side wall of the housing 11. A mounting hole for mounting the air intake channel 12 is provided on the side wall of the housing 11. The interior of the air intake channel 12 forms a cavity and is connected to the interior of the housing 11. The outer wall of the air intake channel 12 is frustum-shaped, and the outer diameter of the outer wall of the air intake channel 12 gradually decreases in the direction toward the interior of the housing 11.

[0024] The end of the air intake channel 12 facing the inside of the housing 11 is arranged corresponding to the semiconductor detection unit 13. External airflow enters the inside of the housing 11 through the air intake channel 12 and acts on the semiconductor detection unit 13.

[0025] The semiconductor detection unit 13 utilizes the adsorption of gas molecules on the surface of metal oxides (such as SnO2 and ZnO), where the conductivity changes with the type and concentration of the gas. For example, when the concentration of carbon monoxide (CO) in the tunnel increases, CO molecules react with oxygen ions on the SnO2 surface, releasing electrons and increasing the sensor's conductivity. The CO concentration can be calculated by measuring the change in the electrical signal. This method is suitable for detecting common reducing gases (such as CO and H2) and volatile organic compounds (VOCs) found in tunnels, and is particularly sensitive to low concentrations of harmful gases in vehicle exhaust. It offers fast response and low cost.

[0026] The outer wall of the air intake channel 12 adopts a frustum-shaped structure, with the outer diameter gradually decreasing towards the inside of the housing 11, forming a converging effect similar to a "trumpet mouth". This design can guide the airflow inside and outside the tunnel to flow more concentratedly into the inside of the housing 11, and accelerate the airflow velocity through the principle of cross-sectional area contraction, so that the gas sample can act on the semiconductor detection unit 13 in a more stable state quickly.

[0027] Compared to traditional straight-tube flow channels, this structure can reduce airflow turbulence at the inlet, improve the uniformity and stability of airflow transmission, thereby shortening the response time of the detection unit and improving the detection accuracy of parameters such as gas concentration and composition.

[0028] The end of the air inlet channel 12 away from the housing 11 is connected to the filter element 21 (filter screen 22 and connecting cylinder 23), and its inner wall is provided with a threaded structure for fixing the connecting cylinder 23. The filter screen 22 abuts against the inlet end of the airflow channel and can directly intercept dust, particulate matter and other impurities in the airflow, avoiding contamination of the detection unit or blockage of the airflow channel.

[0029] This integrated design makes the filter element 21 the first barrier for airflow entering the housing 11, ensuring the cleanliness of the detected airflow and enabling quick disassembly and replacement of the filter element 21 through threaded connection, thus reducing maintenance complexity.

[0030] A filter element 21 is connected to the air intake channel 12. The filter element 21 includes a filter screen 22 and a connecting cylinder 23. The filter screen 22 is disposed at the end of the connecting cylinder 23 and abuts against the end of the air intake channel 12 away from the housing 11. The connecting cylinder 23 is threadedly connected to the inner wall of the cavity of the air intake channel 12 and is connected to the interior of the housing 11. The axis of the connecting cylinder 23 is collinear with the axis of the air intake channel 12.

[0031] The filter screen 22 in the filter element 21 directly abuts against the end of the air intake channel 12 furthest from the housing 11, serving as the first barrier for airflow entering the device. It effectively intercepts impurities such as dust, particulate matter, and flocculent matter in the tunnel environment gas. Dust generated by vehicles traveling in the tunnel and solid suspended particles in exhaust fumes may enter the air intake channel 12 with the airflow. If these particles directly contact the semiconductor detection unit 13 without filtration, the surface of the detection element may be covered with impurities, interfering with the effective contact between gas molecules and the detection material, causing data deviation or even false alarms. The filter screen 22 ensures the cleanliness of the airflow entering the housing 11, maintaining the sensitivity and accuracy of the detection unit.

[0032] Once impurities enter the device, they may deposit on critical components such as the electrodes and sensitive membrane layer of the semiconductor detection unit 13. Long-term accumulation can lead to decreased component performance, shortened lifespan, and even short circuits. The filter element 21 physically blocks impurities, reducing their direct erosion of the detection unit, thereby reducing the component wear rate, extending the overall lifespan of the device, and reducing maintenance costs associated with component replacement.

[0033] In addition, a clean airflow environment can reduce the risk of failure of internal components such as control board 14 and power supply module 15 due to the intrusion of impurities, and improve the reliability of the device.

[0034] A vibration damping pad 41 is installed at the bottom of the housing 11, supporting the outer wall of the air intake channel 12. The outer wall of the air intake channel 12 is supported by the vibration damping pad 41 at the bottom of the housing 11. Through the elastic buffering effect of the vibration damping pad 41, external disturbances such as vehicle movement and equipment vibration within the tunnel can be effectively isolated, reducing displacement or deformation of the flow channel caused by vibration. This ensures the structural stability of the flow channel itself and indirectly reduces the risk of poor contact and loose components in the semiconductor detection unit 13 caused by vibration, enabling the entire device to maintain reliable operation even in a dynamic vibration environment.

[0035] Furthermore, the environmental monitoring device for tunnel safety proposed in this embodiment also includes a warning light 31, which is mounted on the housing 11 and electrically connected to the controller and the power supply module 15.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An environmental monitoring device for tunnel safety, characterized in that, It includes a housing, an air intake channel, a semiconductor detection unit, a control board, and a power supply module. The semiconductor detection unit, the control board, and the power supply module are disposed inside the housing and are electrically connected to the control board. The air intake channel is disposed on the side wall of the housing, and the side wall of the housing has mounting holes for installing the air intake channel. The interior of the air intake channel forms a cavity and communicates with the interior of the housing. The end of the air intake channel facing the interior of the housing is correspondingly arranged with the semiconductor detection unit. External airflow enters the interior of the housing through the air intake channel and acts on the semiconductor detection unit. A filter element is connected to the air intake channel. The filter element includes a filter screen and a connecting cylinder. The filter screen is disposed at the end of the connecting cylinder. The connecting cylinder is threadedly connected to the inner wall of the cavity of the air intake channel and communicates with the interior of the housing. A vibration damping pad is disposed at the bottom of the housing and supports the outer wall of the air intake channel.

2. The environmental monitoring device for tunnel safety as described in claim 1, characterized in that, It also includes a warning light, which is mounted on the housing and is electrically connected to the controller and the power supply module.

3. The environmental monitoring device for tunnel safety as described in claim 2, characterized in that, The filter screen abuts against the end of the air intake channel away from the housing.

4. The environmental monitoring device for tunnel safety as described in claim 3, characterized in that, The axis of the connecting cylinder is collinear with the axis of the air intake channel.

5. An environmental monitoring device for tunnel safety as described in claim 3, characterized in that, The outer wall of the air intake channel is shaped like a frustum, and the outer diameter of the outer wall of the air intake channel gradually decreases in the direction toward the interior of the housing.

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