A tunnel harmful gas monitoring and alarming device

Abstract

The utility model discloses a tunnel harmful gas monitoring alarm device, including the ground, the surface one side fixed assembly of ground has the support pole, the downside assembly of airflow transmission structure has the trigger structure, and trigger structure links to each other with the ground, through the effect of airflow transmission structure, utilize the tunnel natural air current (such as vehicle piston effect or ventilation system) drive harmful gas (such as CO, NOx) contact chemical color developing material namely color developing board, and the surface of color developing board is attached with molybdate coating or potassium iodide - starch composite film, directly warning through color change, and the support pole guarantees the stability of support frame, and the support frame is used for bearing color developing board, through the effect of trigger structure, and trigger structure cooperates with fan, when airflow transmission structure rotates, will open trigger structure, make it transmit signal to controller, and open fan through controller, and the airflow around is sucked into the support frame, and better convenient color developing board carries out gas monitoring.

Description

Technical Field

[0001] This utility model relates to the field of harmful gas monitoring technology in tunnels, specifically to a harmful gas monitoring and alarm device for tunnels. Background Technology

[0002] Monitoring and alarming of hazardous gases within tunnels is crucial, directly impacting personnel safety, facility operation and maintenance efficiency, and accident prevention capabilities. As semi-enclosed spaces, tunnels are susceptible to the accumulation of hazardous gases, such as vehicle exhaust (carbon monoxide, nitrogen oxides), construction residues (methane, hydrogen sulfide), or accidental leaks (such as hazardous chemical transport accidents). Failure to monitor these gases promptly can lead to anything from dizziness and suffocation to explosions or mass poisoning incidents. Existing monitoring systems require manual handheld installation within the tunnel, making large-scale installation prohibitively expensive and impractical. Utility Model Content

[0003] The purpose of this invention is to provide a hazardous gas monitoring and alarm device for tunnels to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hazardous gas monitoring and alarm device for tunnels, comprising a platform, a support rod fixedly mounted on one side of the platform, a support frame fixedly mounted on the upper end of the support rod, a color display plate inserted through the inner wall of the support frame, a fan fixedly connected to the side wall of the support frame, the gas flow direction after the fan is turned on being from inside the support frame to outside the support frame, an airflow transmission structure fixedly mounted on the other side of the platform, a trigger structure mounted on the lower side of the airflow transmission structure, and the trigger structure being connected to the platform.

[0005] Preferably, the airflow transmission structure includes a bearing seat, which is fixedly mounted on the surface of the platform. A rotating rod is rotatably mounted on the inner wall of the bearing seat, and multiple fan blades are evenly mounted on the outer wall of the rotating rod from top to bottom.

[0006] Preferably, the triggering structure includes a trigger frame and a through-beam infrared sensor. The trigger frame is fixedly mounted on the outer wall of the airflow transmission structure, and the through-beam infrared sensor is fixedly mounted on the surface of the platform. The trigger frame can be moved to the inside of the through-beam infrared sensor.

[0007] Preferably, the number of fan blades is five.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: the platform ensures installation stability; the airflow transmission structure utilizes the natural airflow in the tunnel (such as the piston effect of a vehicle or a ventilation system) to drive harmful gases (such as CO and NOx) to contact the chemical colorimetric material, i.e., the colorimetric plate. The surface of the colorimetric plate is coated with a molybdate coating or a potassium iodide-starch composite film, providing direct warning through color changes; the support rod ensures the stability of the support frame, while the support frame supports the colorimetric plate; through the action of the triggering structure and its cooperation with the fan, when the airflow transmission structure rotates, it will activate the triggering structure, which will transmit a signal to the controller, and the controller will activate the fan to draw the surrounding airflow into the support frame, thus better facilitating gas monitoring by the colorimetric plate. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0010] Figure 2 This is a three-dimensional schematic diagram of the fan blade of this utility model;

[0011] Figure 3 A 3D schematic diagram of the trigger structure;

[0012] Figure 4 This is a side view of the present invention.

[0013] In the diagram: 1-Platform, 2-Airflow transmission structure, 21-Bearing seat, 22-Rotating rod, 23-Fan blade, 3-Support rod, 4-Triggering structure, 41-Triggering frame, 42-Through-beam infrared sensor, 5-Support frame, 6-Color display plate, 7-Fan. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This utility model provides a hazardous gas monitoring and alarm device for tunnels, including a platform 1. A support rod 3 is fixedly mounted on one side of the surface of the platform 1. A support frame 5 is fixedly mounted on the upper end of the support rod 3. A color display plate 6 is inserted through the inner wall of the support frame 5. A fan 7 is fixedly connected to the side wall of the support frame 5. When the fan 7 is turned on, the gas flow direction is from inside the support frame 5 to outside the support frame 5. An airflow transmission structure 2 is fixedly mounted on the other side of the surface of the platform 1. A trigger structure 4 is mounted on the lower side of the airflow transmission structure 2 and is connected to the platform 1.

[0016] The platform 1 ensures installation stability. Through the airflow transmission structure 2, the natural airflow in the tunnel (such as the piston effect of vehicles or the ventilation system) drives harmful gases (such as CO and NOx) to contact the chemical colorimetric material, i.e., the colorimetric plate 6. The surface of the colorimetric plate 6 is coated with a molybdate coating or a potassium iodide-starch composite film. The color change provides a direct warning, which can be detected by manual inspection or periodic monitoring. The support rod 3 ensures the stability of the support frame 5, which also supports the colorimetric plate 6. Through the action of the trigger structure 4 and its cooperation with the fan 7, when the airflow transmission structure 2 rotates, the trigger structure 4 is activated, which transmits a signal to the controller. The controller then turns on the fan 7, drawing the surrounding airflow into the support frame 5, which facilitates gas monitoring by the colorimetric plate 6. The overall cost of the equipment is low, and it can be installed in large quantities on both sides of the tunnel.

[0017] The airflow transmission structure 2 includes a bearing seat 21, which is fixedly mounted on the surface of the base 1. A rotating rod 22 is rotatably mounted on the inner wall of the bearing seat 21, and multiple fan blades 23 are evenly mounted on the outer wall of the rotating rod 22 from top to bottom.

[0018] The trigger structure 4 includes a trigger frame 41 and a through-beam infrared sensor 42. The trigger frame 41 is fixedly mounted on the outer wall of the airflow transmission structure 2, and the through-beam infrared sensor 42 is fixedly mounted on the surface of the platform 1. The trigger frame 41 can be moved to the inside of the through-beam infrared sensor 42.

[0019] When a vehicle passes through a tunnel, the piston effect of the vehicle will cause the surrounding air to move. This will cause the fan blades 23 in the airflow transmission structure 2 on both sides of the tunnel to rotate. Since the rotating rod 22 is connected to the bearing seat 21, the rotation of the fan blades 23 is unaffected. At this time, the rotating rod 22 will drive the trigger frame 41 in the trigger structure 4 to move. When the trigger frame 41 rotates and moves to the inside of the through-beam infrared sensor 42, it will block the infrared light path from the transmitter to the receiver, interrupting the receiver signal, triggering the sensor, and starting the fan 7 through the controller to draw the surrounding gas into the support frame 5 for monitoring. If the color display panel 6 changes color, it is necessary to pay attention to the presence of toxic gas in the surrounding area.

[0020] The number of fan blades 23 is five.

[0021] Multiple sets of fan blades 23 ensure a wide range of applications.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hazardous gas monitoring and alarm device for tunnels, characterized in that: The system includes a platform (1), on one side of the surface of the platform (1) a support rod (3) is fixedly mounted, and a support frame (5) is fixedly mounted on the upper end of the support rod (3). A color display plate (6) is inserted through the inner wall of the support frame (5). A fan (7) is fixedly connected to the side wall of the support frame (5). When the fan (7) is turned on, the air flow direction is from inside the support frame (5) to outside the support frame (5). An airflow transmission structure (2) is fixedly mounted on the other side of the surface of the platform (1). A trigger structure (4) is mounted on the lower side of the airflow transmission structure (2), and the trigger structure (4) is connected to the platform (1).

2. A device for monitoring and alarming of harmful gases in a tunnel according to claim 1, characterized in that: The airflow transmission structure (2) includes a bearing seat (21), which is fixedly mounted on the surface of the platform (1). A rotating rod (22) is rotatably mounted on the inner wall of the bearing seat (21), and multiple fan blades (23) are evenly mounted on the outer wall of the rotating rod (22) from top to bottom.

3. A device for monitoring and alarming of harmful gases in a tunnel according to claim 1, characterized in that: The triggering structure (4) includes a trigger frame (41) and a through-beam infrared sensor (42). The trigger frame (41) is fixedly mounted on the outer wall of the airflow transmission structure (2), and the through-beam infrared sensor (42) is fixedly mounted on the surface of the platform (1). The trigger frame (41) can be moved to the inside of the through-beam infrared sensor (42).

4. The tunnel harmful gas monitoring and alarming device according to claim 2, characterized in that: The number of fan blades (23) is five.

Images