Anti-freezing device for fire-fighting pipeline

Abstract

The utility model discloses an anti-freezing device for a fire-fighting pipeline, and belongs to the technical field of fire-fighting safety. The anti-freezing device for the fire-fighting pipeline comprises a water circulating pipeline, a bubble generator and a fire-fighting branch pipe connected with fire-fighting equipment, the water circulating pipeline is provided with a water inlet end and a water outlet end; the fire-fighting branch pipe is connected to the top of the water circulating pipeline, a through type connecting point is formed between the fire-fighting branch pipe and the water circulating pipeline, and the through type connecting point is higher than the inner wall of the top of the water circulating pipeline; when small bubbles wrapped by water flow through the through type connecting point, the small bubbles upwards float along the fire-fighting branch pipe to empty water in the fire-fighting branch pipe, and an air-filled water-free state is formed in the fire-fighting branch pipe; the bubble generator is arranged on the pipe section between the water inlet end of the water circulation pipeline and the fire-fighting branch pipe and used for filling air into the water circulation pipeline so that small bubbles wrapped by water can be formed in the water circulation pipeline. According to the utility model, the problem that the fire-fighting equipment at the tunnel portal cannot be normally used due to freezing is effectively solved.

Description

A fire-fighting pipeline antifreeze device Technical Field

[0001] This utility model belongs to the field of fire safety technology, and in particular relates to a fire pipeline antifreeze device. Background Technology

[0002] In existing fire protection systems, indoor and outdoor fire hydrants are critical fire protection facilities, and their proper functioning directly affects the effectiveness of fire emergency response and the safety of people and property. Especially in cold regions or during winter, water fire-fighting pipeline systems in highway tunnels are highly susceptible to freezing and failure. Furthermore, indoor and outdoor fire hydrants located at tunnel entrances are also prone to freezing and becoming unusable. Therefore, solving the freezing problem has become a core challenge in ensuring the reliability of fire protection facilities.

[0003] Traditional fire-fighting pipeline antifreeze measures typically employ hot water circulation technology to maintain pipeline temperature and prevent water from freezing. However, under conditions of prolonged pump shutdown or extreme low temperatures, relying solely on hot water circulation may not be sufficient to guarantee antifreeze effectiveness. Furthermore, in dry fire-fighting systems employing pre-action methods, the response time of fire hydrants during a fire may not meet the required standards. Summary of the Invention

[0004] This utility model provides a fire-fighting pipeline antifreeze device to address the issue that relying solely on hot water circulation may not fully guarantee antifreeze effectiveness under prolonged pump shutdowns or extreme low-temperature conditions. Alternatively, it addresses the problem that in dry fire-fighting systems employing pre-action methods, the response time of fire hydrants during a fire may not meet the required standards.

[0005] The technical solution adopted in this embodiment of the utility model is a fire-fighting pipeline antifreeze device, which includes a water circulation pipeline, an air generator, and a fire branch pipe for connecting fire-fighting equipment.

[0006] The water circulation pipeline has an inlet end and an outlet end; the inlet end and the outlet end are used to realize the circulation between the water flow in the pipeline and the water storage tank.

[0007] The fire branch pipe is connected to the top of the water circulation pipe. The fire branch pipe includes a channel for small air bubbles to float to the fire equipment and forms a through connection point with the water circulation pipe. The position of the through connection point is higher than the top inner wall of the water circulation pipe. When the small air bubbles carried by the water flow through the through connection point, the small air bubbles float up along the fire branch pipe to the fire equipment and drain the water in the fire branch pipe, forming an air-filled waterless state inside the fire branch pipe.

[0008] The bubble generator is installed on the section of the water circulation pipe between the inlet and the fire branch pipe. It is used to fill the water circulation pipe with air so that small bubbles are formed inside the water circulation pipe.

[0009] Furthermore, the fire branch pipe includes a horizontally arranged branch pipe and bends connected to both ends of the horizontal branch pipe; the horizontal branch pipe is connected downward to the top of the water circulation pipe through one of the bends and connected upward to the fire-fighting equipment through the other bend.

[0010] Furthermore, the fire-fighting pipeline antifreeze device also includes an automatic air vent valve; the automatic air vent valve is installed in the water circulation pipeline and is used to automatically discharge the air accumulated in the water circulation pipeline.

[0011] Furthermore, the fire-fighting pipeline antifreeze device also includes at least one circulating pump; the inlet of the circulating pump is connected to the inlet end of the water circulation pipeline, and the outlet of the circulating pump is connected to the fluid input end of the bubble generator.

[0012] Furthermore, the bubble generator includes an air compressor; the exhaust port of the air compressor is connected to the outlet pipe of the circulation pump for filling the interior of the water circulation pipe with air.

[0013] Furthermore, the fire-fighting equipment includes outdoor fire hydrants and indoor fire hydrants, which are respectively connected to the end of the corresponding fire branch pipe.

[0014] The beneficial effects of this invention are as follows: This invention injects small air bubbles into the water circulation pipe using a bubble generator. When these small air bubbles, carried by the water flow, pass through the connection point between the fire branch pipe and the water circulation pipe, the bubbles will move upward along the fire branch pipe under the action of buoyancy because the connection point is higher than the top inner wall of the water circulation pipe. During this process, the bubbles squeeze the water in the fire branch pipe and fire equipment back into the water circulation pipe, thereby creating an air-filled, waterless state inside the fire equipment and its connected fire branch pipe, effectively avoiding the risk of freezing. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the fire-fighting pipeline antifreeze device provided in an embodiment of this utility model;

[0016] Figure 2 is a schematic diagram of the connection structure between the outdoor fire hydrant and the fire branch pipe provided in the embodiment of this utility model;

[0017] Figure 3 is a schematic diagram of the connection structure between the indoor fire hydrant and the fire branch pipe provided in the embodiment of this utility model.

[0018] Attached reference numerals: 1. Water storage tank; 2. Water circulation pipe; 21. Inlet; 22. Outlet; 23. Connection point; 3. Bubble generator; 4. Fire branch pipe; 41. Horizontal branch pipe; 42. Connecting pipe; 5. Automatic air vent valve; 6. Circulation pump; 61. Inlet; 62. Outlet; 7. Air compressor; 71. Exhaust port; 8. Pump room; 9. Outdoor fire hydrant; 10. Indoor fire hydrant; 11. Pipe support; 12. Cement support; 13. Outdoor ground. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. Rather, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] This utility model provides a fire pipeline antifreeze device, as shown in Figures 1 to 3. The fire pipeline antifreeze device includes a water circulation pipe 2, an air bubble generator 3, and a fire branch pipe 4 for connecting fire equipment.

[0021] The water circulation pipe 2 has an inlet end 21 and an outlet end 22. Both the inlet end 21 and the outlet end 22 are located in the water storage tank 1, which is used to realize the circulation and exchange of water in the water circulation pipe 2 and water in the water storage tank 1.

[0022] As shown in Figures 2 and 3, the fire branch pipe 4 is connected to the top of the water circulation pipe 2, forming a through connection point 23. The through connection point 23 is located higher than the top inner wall of the water circulation pipe 2. The fire branch pipe 4 includes a channel for small air bubbles to float to the fire-fighting equipment. When the small air bubbles carried by the water flow through the through connection point 23, the small air bubbles float upwards along the fire branch pipe 4 and empty the water in the fire branch pipe 4, creating an air-filled, waterless state inside the fire branch pipe 4.

[0023] In addition, as shown in Figure 1, the bubble generator 3 is installed on the water circulation pipe section between the water inlet end 21 of the water circulation pipe 2 and the fire branch pipe 4, and is used to fill the interior of the water circulation pipe 2 with air so that small bubbles encased in water are formed inside the water circulation pipe 2.

[0024] In this embodiment, the fire-fighting pipeline antifreeze device is connected to the water storage tank 1 through the inlet 21 and outlet 22 of the water circulation pipe 2, forming a water circulation. Simultaneously, the fire branch pipe 4 extends from above the water circulation pipe 2 and connects to the fire-fighting equipment. An air bubble generator 3 is installed in the pipe section between the inlet 21 of the water circulation pipe 2 and the fire branch pipe 4, and injects air into the water circulation pipe 2 to generate small air bubbles. These small air bubbles, carried by the water flow, automatically float up along the fire branch pipe 4 to the fire-fighting equipment when they flow past the through-connection point higher than the top inner wall of the water circulation pipe 2, thereby draining the water from the fire branch pipe 4 and the fire-fighting equipment, transforming their interior into a waterless state filled with air, fundamentally preventing freezing and ensuring efficient antifreeze protection of the fire-fighting pipeline and stable operation of the fire-fighting system. Furthermore, the overall structure of this embodiment significantly reduces the energy consumption and maintenance costs associated with traditional heating antifreeze methods. Moreover, in the event of a fire, the small amount of air can be completely expelled within two seconds when the fire-fighting equipment is activated, effectively ensuring a rapid response from the fire-fighting equipment.

[0025] Specifically, as shown in Figure 3, the fire branch pipe 4 includes a horizontally arranged horizontal branch pipe 41 and bends 42 connected to both ends of the horizontal branch pipe 41. The end of the horizontal branch pipe 41 near the water circulation pipe 2 is connected downward to the top of the water circulation pipe 2 through one of the bends 42, while the end near the fire equipment is connected upward to the fire equipment through the other bend 42.

[0026] To maintain the stability of the fire-fighting pipeline antifreeze device, the water circulation pipe 2 is fixed above the pipe support 12, and the horizontal branch pipe 41 is fixed above the cement support 13.

[0027] In this embodiment, the horizontal branch pipe 41 is connected to the top of the water circulation pipe 2 through the bend pipe 42. When the bubble generator 3 injects air into the water circulation pipe 2, the small bubbles carried by the water flow flow to the through connection point 23, and then float up naturally along the bend pipe 42 and enter the horizontal branch pipe 41 until they reach the interior of the fire-fighting equipment.

[0028] The fire branch pipe 4 adopts a technical solution combining a horizontal branch pipe 41 and bends at both ends 42. The horizontal branch pipe 41 is arranged horizontally, and together with the bends at both ends 42, forms a channel that facilitates the flow of air bubbles to the fire-fighting equipment. This technical solution allows air bubbles to quickly rise and enter the horizontal branch pipe 4 and the fire-fighting equipment, thereby completely emptying the water in the fire branch pipe 4 and achieving a waterless antifreeze function. In the event of a fire, this channel allows water to quickly fill the fire branch pipe 4 and the fire-fighting equipment, ensuring a rapid response from the fire-fighting equipment. Furthermore, by using the fire pipeline antifreeze device, large-scale pipe replacement is not required during the modification of the existing fire pipeline antifreeze system, effectively reducing energy consumption and maintenance costs, combining high efficiency and economy.

[0029] In this embodiment, as shown in Figure 1, the fire-fighting pipeline antifreeze device also includes an automatic air vent valve 5. This automatic air vent valve 5 is installed at the highest point of the water circulation pipeline 2 (or the top of a horizontal pipe section) to ensure that air inside the water circulation pipeline 2 can rise naturally due to buoyancy and accumulate at the air vent valve location. If the water circulation pipeline has multiple high points, an automatic air vent valve 5 needs to be installed at each high point to avoid air stagnation and the formation of air resistance. The automatic air vent valve 5 automatically activates its venting function by detecting the air accumulation state inside the water circulation pipeline 2, thereby preventing air accumulation from forming "air resistance" and affecting water circulation efficiency.

[0030] In this embodiment, the automatic air vent valve 5 can be a float-type automatic air vent valve commonly used in the art. The automatic air vent valve 5 and the bubble generator 3 complement each other: the bubble generator 3 actively introduces small bubbles into the pipeline to drain the water accumulated inside the fire branch pipe 4, while the automatic air vent valve 5 passively discharges excess accumulated gas in the water circulation pipeline. Since the float-type automatic air vent valve is a relatively conventional technical means for those skilled in the art, its specific structure will not be described in detail here.

[0031] In this embodiment, the fire-fighting pipeline antifreeze device also includes at least one circulating pump 6. The inlet 61 of the circulating pump 6 is connected to the inlet end 21 of the water circulation pipeline 2, and the outlet 62 of the circulating pump 6 is connected to the fluid input end of the bubble generator 3. The circulating pump 6 is selected as a common centrifugal pump suitable for liquids containing bubbles, used to provide power and drive the water flow.

[0032] In order to better manage the circulating pump 6, in other embodiments, a pump room 8 may be set up, and the circulating pump 6 may be fixed by a base, bracket or other structure to ensure the stability of operation.

[0033] As shown in Figure 1, the bubble generator 3 in this embodiment includes an air compressor 7. The exhaust port 71 of the air compressor 7 is connected to the water circulation pipe 2 on one side of the outlet 62 of the circulation pump 6, for filling the interior of the water circulation pipe 2 with air. The air compressor 7 in this invention can adopt a screw-type structure. In practical applications, the model and exhaust volume of the air compressor 7 can be reasonably selected according to factors such as the pipe diameter of the water circulation pipe 2, the water flow velocity, and the number of fire branch pipes 4, to ensure that the generated bubbles can effectively empty the water inside the fire branch pipes 4 and the connected fire-fighting equipment.

[0034] As shown in Figure 1, the fire-fighting equipment in this embodiment includes an outdoor fire hydrant 9 and an indoor fire hydrant 10. One end of the outdoor fire hydrant 9 is located above the outdoor ground level 13, serving as the water outlet, while the other end extends downwards to below the outdoor ground level 13 via an inlet pipe. One end of the indoor fire hydrant 10 is located inside the building, serving as the water outlet, while the other end extends downwards to below the outdoor ground level 13 via an inlet pipe. The bottom of the inlet pipe of each fire-fighting equipment is connected to the top of the upward bend 42 of the fire branch pipe 4, which is away from the water circulation pipe 2, via pipe fittings. This method forms a continuous water flow channel. When the fire-fighting equipment is not in a fire-fighting state, the water in the bend 42 and the connected inlet pipe can be emptied by the bubbles generated by the bubble generator 3, thus forming a waterless state filled with air, effectively avoiding the freezing problem that may occur under conditions of prolonged pump shutdown or extreme low temperatures.

Claims

1. A fire-fighting pipeline antifreeze device, characterized in that, The system includes a water circulation pipe (2), an aerator (3), and a fire branch pipe (4) for connecting fire-fighting equipment. The water circulation pipe (2) has an inlet end (21) and an outlet end (22). The inlet end (21) and the outlet end (22) are used to realize water circulation between the water in the pipe and the water storage tank (1). The fire branch pipe (4) is connected to the top of the water circulation pipe (2) and forms a through connection point (23) with the water circulation pipe (2). The position of the through connection point (23) is higher than the top inner wall of the water circulation pipe (2). The fire branch pipe (4) contains... The section includes a channel for small bubbles to float to the fire-fighting equipment; when the small bubbles carried by water flow through the through-connection point (23), the small bubbles float upward along the fire branch pipe (4) into the fire-fighting equipment and drain the water in the fire branch pipe (4), so that the interior of the fire branch pipe (4) is filled with air and waterless; the bubble generator (3) is set on the pipe section between the water inlet end (21) of the water circulation pipe (2) and the fire branch pipe (4), and is used to fill the interior of the water circulation pipe (2) with air so that the small bubbles carried by water are formed inside the water circulation pipe (2).

2. The fire-fighting pipeline antifreeze device according to claim 1, characterized in that, The fire branch pipe (4) includes a horizontal branch pipe (41) arranged horizontally, and a bend pipe (42) connected to both ends of the horizontal branch pipe (41); the horizontal branch pipe (41) is connected downward to the top of the water circulation pipe (2) through one of the bend pipes (42), and connected upward to the fire-fighting equipment through the other bend pipe (42).

3. The fire-fighting pipeline antifreeze device according to claim 1, characterized in that, It also includes an automatic air vent valve (5); the automatic air vent valve (5) is installed in the water circulation pipe (2) and is used to automatically vent the air accumulated in the water circulation pipe (2).

4. The fire-fighting pipeline antifreeze device according to claim 1, characterized in that, It also includes at least one circulation pump (6); the inlet (61) of the circulation pump (6) is connected to the inlet end (21) of the water circulation pipe (2), and the outlet (62) of the circulation pump (6) is connected to the fluid input end of the bubble generator (3).

5. The fire-fighting pipeline antifreeze device according to claim 4, characterized in that, The bubble generator (3) includes an air compressor (7); the exhaust port (71) of the air compressor (7) is connected to the outlet (62) pipe of the circulation pump (6) for filling the interior of the water circulation pipe (2) with air.

6. The fire-fighting pipeline antifreeze device according to claim 1, characterized in that, The fire-fighting equipment includes an outdoor fire hydrant (9) and an indoor fire hydrant (10), which are respectively connected to the end of the corresponding fire branch pipe (4).

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