A liquid level monitoring device for a tunnel fire water reservoir

Abstract

The utility model discloses a kind of liquid level monitoring devices of tunnel fire pool, belong to tunnel fire equipment technical field, the device includes monitoring camera installed in pool top and is placed in globular floating head in water pool.The floating head is connected by thread or locking screw connection and is constituted by upper hemisphere shell and lower hemisphere shell, inside is equipped with counterweight, top ring cloth horizontal laser lamp that emits outward.The lower hemisphere shell bottom is penetrated into power line, and is connected to built-in lower electrode column.The lower electrode column and the upper electrode column coaxially contacted power on with being fixed to the upper hemisphere shell, and the lower electrode column is ensured stable contact by spring buffer.The laser beam is projected to pool wall and forms light point group, and image can be clearly judged water level by camera remote capture.The device has anti-impact, self-righting, anti-hooking characteristics, and electric connection is stable and reliable, realizes the remote, intuitive monitoring of closed pool liquid level.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel fire protection equipment, specifically relating to a liquid level monitoring device for a tunnel fire water tank. Background Technology

[0002] Tunnel fire water tanks are indispensable water storage facilities in tunnel fire protection systems, typically located inside the tunnel or in adjacent enclosed spaces. Their primary function is to provide a sufficient and pressurized reserve of fire-fighting water for the fire suppression system in the event of a sudden fire. These tanks are usually large, strategically located, and kept on standby for extended periods to ensure rapid activation in emergencies. The reliability of their water storage capacity directly impacts the efficiency of tunnel fire suppression and public safety.

[0003] Current technologies present numerous challenges for real-time monitoring of fire-fighting water tank levels in dark, enclosed tunnel environments. On one hand, common manual inspection methods rely on tunnel spaces where personnel have difficulty accessing them and may be dangerous, resulting in low efficiency and the inability to achieve remote real-time monitoring. On the other hand, the interior of the tank often contains complex components such as supports and pipes, making floating monitoring devices prone to overturning, jamming, or component damage when subjected to water level fluctuations, leading to monitoring interruptions. Existing monitoring methods struggle to provide intuitive, clear, and reliable level indications remotely in harsh, low-light environments, failing to effectively guarantee a constant supply of water in the fire-fighting tank and the long-term stable operation of the system, thus posing a potential hazard to tunnel fire safety. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a liquid level monitoring device for a tunnel fire water tank, which solves the technical problems of unclear water level observation and easy overturning and damage of water level indicator equipment in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model includes a monitoring camera installed on the top of a fire water tank and a floating head placed in the tank. The floating head has a spherical structure and includes an upper hemispherical shell and a lower hemispherical shell that are spliced ​​together. It also includes a counterweight block fixedly installed inside the lower hemispherical shell and several laser lights arranged around the upper hemispherical shell. The floating head floats on the water surface under the weight of the counterweight block, the upper hemispherical shell protrudes from the water surface, and the laser lights are emitted horizontally outward.

[0007] Optionally, it also includes a power cord extending from the surveillance camera, the power cord passing through the bottom of the lower hemispherical housing and electrically connected to several of the lasers.

[0008] Optionally, the upper hemisphere shell has an inwardly threaded groove on its edge, and the lower hemisphere shell has an outwardly threaded tube on its edge. The edges of the upper hemisphere shell and the lower hemisphere shell are threadedly connected to form a sphere.

[0009] Optionally, the upper hemisphere shell has an inwardly formed upper annular groove on its edge, and the lower hemisphere shell has an inwardly formed lower annular groove on its edge. It also includes a sealing ring, which is embedded between the upper and lower annular grooves. The upper and lower hemisphere shells are connected and joined together by locking screws to form a sphere.

[0010] Optionally, the floating head further includes a lower electrode post fixed at the center of the lower hemisphere and an upper electrode post fixed at the center of the upper hemisphere. The upper electrode post is electrically connected to the laser lamp, and the lower electrode post is electrically connected to the power line. When the upper and lower hemispheres are closed, the upper and lower electrode posts come into contact with each other.

[0011] Optionally, the lower electrode post includes a lower inner post and a lower outer post coaxially surrounding the outer side of the inner post. The lower inner post and the lower outer post are electrically connected to the positive and negative lines of the power supply line, respectively. The upper electrode post includes an upper inner post and an upper outer post coaxially surrounding the outer side of the upper inner post. The upper inner post and the upper outer post are electrically connected to the positive and negative lines of the laser lamp, respectively. The lower electrode post and the upper electrode post are coaxial and coaxial with the thread axis of the upper hemispherical shell.

[0012] Optionally, the lower electrode post further includes a base and a spring. The lower inner post and the lower outer post are fixedly mounted on the base. A sliding hole is opened on the counterweight block. The base is vertically slidably mounted in the sliding hole. The spring is supported between the base and the bottom of the sliding hole.

[0013] Optionally, the outer layer of the lower inner column and the upper inner column includes a rubber layer, and the inner and outer layers of the lower outer column and the upper outer column are wrapped with a rubber layer. The contact points of the lower inner column, the upper inner column, the lower outer column, and the upper outer column are all higher than the rubber layer.

[0014] The beneficial effects of this utility model are as follows: By setting a spherical floating head in the fire water tank, which is formed by splicing an upper hemisphere and a lower hemisphere, and fixing a counterweight inside, the floating head is ensured to float stably on the water surface under the weight of the counterweight. The spherical floating head has multiple optimization effects: its rounded shape is self-adapting to water pressure, and it can roll and unload force when it is hit at any angle, reducing the risk of impact damage. The design of lowering the center of gravity combined with the symmetry of the sphere allows it to automatically return to an upright posture when the water level fluctuates, and has strong anti-overturning properties; the cornerless structure avoids the problem of hooking and jamming of complex components such as pipes and supports in the water tank; at the same time, the curved surface of the sphere can guide the water flow to flow smoothly around it, reduce turbulence resistance, and improve the stability and long-term performance of liquid level monitoring. Reliability: The upper hemisphere protrudes above the water surface, with multiple laser lights surrounding it projecting laser beams horizontally outwards, illuminating the perimeter of the fire-fighting water tank. A monitoring camera mounted on the top of the tank allows for clear and rapid remote capture and identification of these laser points. By observing the laser point clusters, the water level in the tunnel's fire-fighting water tank can be quickly determined. Power is supplied via a power cable extending from the monitoring camera, which passes through the bottom of the lower hemisphere and connects to the lower electrode post. When the shell is closed, the lower electrode post and the upper electrode post at the center of the upper hemisphere are coaxially energized, and the spring action of the lower electrode post ensures constant contact between the upper and lower electrodes. This device allows for clear remote observation of the water level in a dark, enclosed tank, enabling timely replenishment of the fire-fighting water tank to respond to sudden fires within the tunnel.

[0015] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model liquid level monitoring device;

[0018] Figure 2 This is a schematic diagram of the structure of the lower hemispherical shell of the utility model.

[0019] Figure 3 A cross-sectional view of the threaded connection structure of this utility model;

[0020] Figure 4 A cross-sectional view of the sealing and closing structure of this utility model;

[0021] The following are labeled in the attached diagram: 1. Surveillance camera; 2. Floating head; 21. Upper hemispherical shell; 22. Lower hemispherical shell; 23. Counterweight; 231. Sliding hole; 24. External threaded pipe; 25. Sealing ring; 26. Upper electrode post; 261. Upper inner post; 262. Upper outer post; 27. Lower electrode post; 271. Lower inner post; 272. Lower outer post; 273. Base; 274. Spring; 3. Power cord; 4. Laser light; 5. Rubber layer. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0023] Please refer to the figures. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0024] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0025] This utility model provides a liquid level monitoring device for a tunnel fire-fighting water tank, such as... Figure 1 As shown, the device includes a monitoring camera installed on top of the fire water tank and a floating head placed in the tank. The floating head has a spherical structure and includes an upper hemisphere and a lower hemisphere that are spliced ​​together. It also includes a counterweight fixed inside the lower hemisphere and several laser lights surrounding the upper hemisphere. The upper and lower hemispheres are made of engineering plastic. The hollow structure of the upper hemisphere ensures that the entire upper hemisphere of the floating head protrudes above the water surface, and the laser lights project horizontally outwards. The device also includes a power cord extending from the monitoring camera, which passes through the bottom of the lower hemisphere and is electrically connected to the laser lights. Figure 3As shown, the upper and lower hemispherical shells can be connected by threads. Specifically, the upper hemispherical shell has an inwardly threaded groove along its edge, and the lower hemispherical shell has an outwardly threaded tube along its edge. The edges of the upper and lower hemispherical shells are threaded together to form a sphere. Figure 2 As shown, the upper and lower hemispheres can also be joined together using screws. Specifically, the upper hemisphere has an inwardly formed upper annular groove along its edge, and the lower hemisphere has an inwardly formed lower annular groove along its edge. A sealing ring is also included, embedded between the upper and lower annular grooves. The upper and lower hemispheres are joined together by locking screws to form a sphere. (Reference) Figure 3 or Figure 4 The floating head also includes a lower electrode post fixed at the center of the lower hemisphere and an upper electrode post fixed at the center of the upper hemisphere. The upper electrode post is electrically connected to the laser lamp, and the lower electrode post is electrically connected to the power line. When the upper and lower hemispheres are closed, the upper and lower electrode posts are in contact with each other. Figure 2 The lower electrode post includes a lower inner post and a lower outer post coaxially surrounding the outer side of the inner post. The lower inner post and the lower outer post are electrically connected to the positive and negative lines of the power supply line, respectively. The upper electrode post includes an upper inner post and an upper outer post coaxially surrounding the outer side of the upper inner post. The upper inner post and the upper outer post are electrically connected to the positive and negative lines of the laser lamp, respectively. The lower electrode post and the upper electrode post are coaxial and coaxial with the thread axis of the upper hemispherical shell. The lower electrode post also includes a base and a spring. The lower inner post and the lower outer post are fixedly mounted on the base. A sliding hole is opened on the counterweight. The base is vertically slidably mounted in the sliding hole. The spring is supported between the base and the bottom of the sliding hole. The outer layer of the lower inner post and the upper inner post includes a rubber layer. The inner and outer layers of the lower outer post and the upper outer post are wrapped with a rubber layer. The contact points of the lower inner post, the upper inner post, the lower outer post, and the upper outer post are all higher than the rubber layer.

[0026] This invention is based on the floating mechanism of a floating head: a spherical floating head, formed by splicing an upper and lower hemisphere shell, is installed in the fire water tank. A counterweight is fixed inside, ensuring the floating head floats stably on the water surface under the weight of the counterweight. The spherical floating head offers multiple optimizations: its rounded shape adapts to water pressure, and it can roll and dissipate force from collisions at any angle, reducing the risk of impact damage. The lowered center of gravity design, combined with the spherical symmetry, allows it to automatically return to an upright position when the water level fluctuates, providing strong anti-overturning properties. The absence of sharp edges avoids the problem of hooking and jamming with complex components such as pipes and supports within the tank. Simultaneously, the curved surface of the sphere guides water flow smoothly around the surface, reducing turbulence resistance and improving the stability of liquid level monitoring. For long-term reliability, the upper hemisphere protrudes above the water surface, with multiple laser lights surrounding it projecting laser beams horizontally outwards, illuminating the perimeter of the fire-fighting water tank. A monitoring camera mounted on the top of the tank allows for clear and rapid remote capture and identification of these laser points. By observing the laser point array, the water level in the tunnel's fire-fighting water tank can be quickly determined. Power is supplied via a power cable extending from the monitoring camera, which passes through the bottom of the lower hemisphere and connects to the lower electrode post. When the shell is closed, the lower electrode post and the upper electrode post at the center of the upper hemisphere are coaxially energized, and the spring action of the lower electrode post ensures constant contact between the upper and lower electrodes. This device allows for clear remote observation of the water level in a dark, enclosed tank, enabling timely replenishment of the fire-fighting water tank to respond to sudden fires within the tunnel.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A liquid level monitoring device for a tunnel fire-fighting water tank, characterized in that: The system includes a monitoring camera installed on the top of the fire water tank and a floating head placed in the tank. The floating head has a spherical structure and includes an upper hemisphere and a lower hemisphere that are spliced ​​together. It also includes a counterweight fixed inside the lower hemisphere and several laser lights arranged around the upper hemisphere. The floating head floats on the water surface under the weight of the counterweight, the upper hemisphere protrudes from the water surface, and the laser lights are emitted horizontally outward. The floating head also includes a lower electrode post fixed at the center of the lower hemisphere and an upper electrode post fixed at the center of the upper hemisphere. The upper electrode post is electrically connected to the laser lamp, and the lower electrode post is electrically connected to the power line. When the upper and lower hemispheres are closed, the upper and lower electrode posts are in contact with each other. The lower electrode post includes a lower inner post and a lower outer post coaxially surrounding the outer side of the inner post. The lower inner post and the lower outer post are electrically connected to the positive and negative lines of the power supply line, respectively. The upper electrode post includes an upper inner post and an upper outer post coaxially surrounding the outer side of the upper inner post. The upper inner post and the upper outer post are electrically connected to the positive and negative lines of the laser lamp, respectively. The lower electrode post and the upper electrode post are coaxial and coaxial with the thread axis of the upper hemispherical shell. The lower electrode post also includes a base and a spring. The lower inner post and the lower outer post are fixedly mounted on the base. A sliding hole is opened on the counterweight. The base is vertically slidably mounted in the sliding hole. The spring is supported between the base and the bottom of the sliding hole. The outer layer of the lower inner column and the upper inner column includes a rubber layer, and the inner and outer layers of the lower outer column and the upper outer column are wrapped with a rubber layer. The contact points of the lower inner column, the upper inner column, the lower outer column, and the upper outer column are all higher than the rubber layer.

2. The liquid level monitoring device for a tunnel fire-fighting water tank according to claim 1, characterized in that: It also includes a power cord extending from the surveillance camera, which passes through the bottom of the lower hemispherical housing and is electrically connected to several of the lasers.

3. The liquid level monitoring device for a tunnel fire-fighting water tank according to claim 2, characterized in that: The upper hemisphere shell has an inwardly threaded groove on its edge, and the lower hemisphere shell has an outwardly threaded tube on its edge. The edges of the upper and lower hemisphere shells are threaded together to form a sphere.

4. The liquid level monitoring device for tunnel fire-fighting water tank according to claim 2, characterized in that: The upper hemisphere shell has an inwardly formed upper annular groove on its edge, and the lower hemisphere shell has an inwardly formed lower annular groove on its edge. It also includes a sealing ring, which is embedded between the upper and lower annular grooves. The upper and lower hemisphere shells are connected and joined together by locking screws to form a sphere.

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