Dual-mode tunnel anti-freezing and fire-fighting integrated intelligent unit

Abstract

The invention relates to the technical field of fire-fighting water supply systems, in particular to a dual-mode tunnel anti-freezing and fire-fighting integrated intelligent unit which comprises a fire-fighting unit, an anti-freezing unit, a water supplementing unit, an intelligent control unit and a valve set. The anti-freezing unit is used for circularly heating and preserving heat for water in the fire-fighting pipeline; the water replenishing unit is used for replenishing water for the fire-fighting pipeline and the anti-freezing unit; the intelligent control unit is used for monitoring the pressure of water in the fire-fighting pipeline in real time and realizing automatic switching from a winter mode to a summer mode; the valve group is used for adjusting the water flow direction and realizing switching between a summer mode and a winter mode; in the winter mode, when the intelligent control unit detects that the water pressure of the fire-fighting pipeline is abnormally and rapidly reduced, the intelligent control unit controls the valve set, physical isolation of the fire-fighting pipeline and the anti-freezing unit is achieved, meanwhile, the fire-fighting unit provides fire-fighting water pressure for the fire-fighting pipeline, energy consumption is reduced, and maintenance convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire water supply systems, and in particular to a dual-mode tunnel antifreeze and fire fighting integrated intelligent unit. Background Art

[0002] In winter in northern and northwest China, fire-fighting pipes in tunnels are prone to freezing due to low temperatures, seriously affecting the normal use of fire-fighting systems. Currently, heating tape insulation is commonly used to prevent pipe freezing. However, this method has problems such as high energy consumption, inaccurate temperature control, insufficient system reliability, and difficulty in subsequent maintenance. Specifically, the following are the problems: 1. High energy consumption and inaccurate temperature control: The heating method of the heating cable consumes a lot of energy in actual application. Due to its extensive heating mode, it is difficult to achieve accurate temperature control, which easily leads to energy waste. In addition, improper temperature control may cause the risk of local overheating or freezing of the pipeline. 2. Insufficient system reliability: As a linear heating element, the operational stability of the heating cable is easily affected by factors such as line aging and contact failure. Once a heating cable fails somewhere, the entire tunnel antifreeze system may face the risk of failure. 3. Difficulty in later maintenance: The heating cable is usually wrapped in insulation structures such as insulation cotton. It is difficult to quickly locate the problem point in case of failure. Maintenance personnel need to dismantle the insulation layer for inspection and repair, which increases the difficulty and cost of maintenance. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a dual-mode tunnel antifreeze and fire protection integrated intelligent unit that reduces energy consumption and improves maintenance convenience.

[0004] The present invention provides a dual-mode tunnel antifreeze and fire protection integrated intelligent unit, comprising a fire protection unit, an antifreeze unit, a water supply unit, an intelligent control unit and a valve unit. Fire-fighting unit, used for high-pressure water supply to fire-fighting pipelines; Antifreeze unit, used for circulating heating and heat preservation of water in fire protection pipes; Water supply unit, used to supply water to fire protection pipes and antifreeze units; The intelligent control unit monitors the water pressure inside the fire protection pipe in real time, enabling automatic switching from winter mode to summer mode; The valve group adjusts the direction of water flow to achieve switching between summer mode and winter mode; in summer mode, the antifreeze unit is physically isolated from the fire-fighting pipe through the valve group and the fire-fighting unit provides stable pressure to the water inside the fire-fighting pipe, and the antifreeze unit stops running. In winter mode, the valve group physically isolates the fire-fighting pipe from the fire-fighting unit, and the antifreeze unit circulates and heats the water inside the fire-fighting pipe. In the event of a fire, the water in the fire-fighting pipe in winter mode is extinguished, causing the water pressure to drop. The water supplied by the water supply unit is heated by the antifreeze unit and then replenished into the fire-fighting pipe. In winter mode, the intelligent control unit detects an abnormally rapid drop in the water pressure in the fire-fighting pipe. The intelligent control unit controls the valve group to achieve physical isolation between the fire-fighting pipe and the antifreeze unit. At the same time, the fire-fighting unit provides fire-fighting water pressure to the fire-fighting pipe, which reduces energy consumption and improves maintenance convenience.

[0005] Preferably, the fire fighting unit includes a fire fighting water pump and a fire fighting pool, the fire fighting water pump includes a water supply main pump B07 and a water supply main pump B08, the input ends of the water supply main pump B07 and the water supply main pump B08 are both connected to the output end of the fire fighting pool, and the output ends of the water supply main pump B07 and the water supply main pump B08 are respectively connected to the fire fighting pipeline; The valve group includes electric valve F1, electric valve F2, electric valve F3 and electric valve F4. Electric valve F3 and electric valve F4 are set between the main water supply pump B07, the main water supply pump B08 and the fire protection pipe, and electric valve F1 and electric valve F2 are set between the fire protection pipe and the antifreeze unit. In summer mode, the staff closes the electric valve F1 and electric valve F2 and opens the electric valve F3 and electric valve F4, so that the antifreeze unit is physically isolated from the fire protection pipe. At the same time, the main water supply pump B07 and the main water supply pump B08 are started to make the water in the fire protection pool flow out. The water in the fire-fighting pipe is sent to the fire-fighting pipe, thereby providing sufficient water pressure in the fire-fighting pipe. The water does not circulate in the fire-fighting pipe. In winter mode, the staff opens the electric valve F1 and the electric valve F2 and closes the electric valve F3 and the electric valve F4. The fire-fighting pipe is physically isolated from the fire-fighting unit. The water in the fire-fighting pipe enters the antifreeze unit for heating under the action of its own gravity. The heated water returns to the fire-fighting pipe under the action of the antifreeze unit, realizing the antifreeze unit to circulate and heat the water in the fire-fighting pipe, thereby realizing the antifreeze of the water in the fire-fighting pipe in cold winter weather.

[0006] Preferably, the antifreeze unit includes an electric boiler, a plate heat exchanger and a circulation pump, the electric valve F2 is installed on the water inlet pipe of the fire-fighting pipe and the plate heat exchanger, the electric valve F1 is installed on the water outlet pipe of the fire-fighting pipe and the plate heat exchanger, the circulation pump is used to draw water from the fire-fighting pipe through the water inlet pipe into the plate heat exchanger for heating, and then re-transport it to the fire-fighting pipe through the water outlet pipe, and the electric boiler is used to provide a heat source for the plate heat exchanger; in winter mode, the staff opens the electric valves F1 and F2 and closes the electric valves F3 and F4, starts the electric boiler, and supplies heat source to the plate heat exchanger, starts the circulation pump, and the water in the fire-fighting pipe enters the plate heat exchanger under the action of the water inlet pipe and the circulation pump. The heat source provided by the electric boiler heats the water in the plate heat exchanger, and then the heated water returns to the fire-fighting pipe through the water outlet pipe, thereby achieving heat preservation of the fire-fighting pipe water in winter and avoiding the situation where the water in the fire-fighting pipe is frozen and cannot be used when water is urgently needed in case of fire.

[0007] Preferably, the water supply unit includes a pressure gauge assembly and a water supply pump assembly. The pressure gauge assembly monitors the pressure of the water inlet pipe and the water outlet pipe and monitors the water pressure between the electric boiler and the plate heat exchanger. The water supply pump assembly replenishes water for the fire protection pipe and the electric boiler according to the monitoring of the pressure gauge; when the pressure gauge assembly detects insufficient water pressure in the water inlet pipe and the water outlet pipe, or detects insufficient water pressure between the electric boiler and the plate heat exchanger, the staff starts the water supply pump assembly and performs water supply operations on the water inlet pipe and the electric boiler respectively to ensure that the pressure pipe avoids triggering the control unit.

[0008] Preferably, the intelligent control unit includes a controller and a point pressure gauge assembly, the point pressure gauge assembly is used to detect the water pressure inside the fire-fighting pipe, and the controller is used to forcibly close the electric valve F1 and the electric valve F2 and forcibly open the electric valve F3 and the electric valve F4; in winter mode, when the point pressure gauge assembly detects that the water pressure inside the fire-fighting pipe drops abnormally quickly, the point pressure gauge assembly will feed back the detection value to the controller, and the controller will forcibly close the electric valve F1 and the electric valve F2 and forcibly open the electric valve F3 and the electric valve F4, so that the fire-fighting system automatically switches from winter mode to summer mode, the antifreeze unit exits operation, and the fire-fighting unit starts immediately to provide the necessary fire-fighting water pressure for the fire-fighting pipe.

[0009] Preferably, the fire-fighting unit also includes a booster main pump B05 and an additional main pump B06, which are used to quickly transport water from the fire-fighting pool to the fire-fighting pipeline; when the water-making main pump B07 and the water-making main pump B07 fail or the water delivery pressure is insufficient, the booster main pump B05 and / or the additional main pump B06 are started to improve the efficiency of replenishing the water tank of the fire-fighting pool and the fire-fighting pipeline.

[0010] Preferably, the electric boiler includes an electric boiler D01 and an electric boiler D02, the pressure gauge assembly includes a pressure gauge Y1, a pressure gauge Y2, a pressure gauge Y3 and a pressure gauge Y4, the plate heat exchanger includes a plate heat exchanger H01 and a plate heat exchanger H02, the circulating pump includes a circulating pump B01, a circulating pump B02, a circulating pump B03 and a circulating pump B04, the circulating pump B01 provides a driving force for the electric boiler D01 to provide hot water to the plate heat exchanger H01, the circulating pump B02 provides a driving force for the electric boiler D02 to provide hot water to the plate heat exchanger H02, the pressure gauge Y01 detects the hot water pressure between the electric boiler D01 and the plate heat exchanger H01, and the pressure gauge Y02 detects the pressure between the electric boiler D02 and the plate heat exchanger H02. The hot water pressure between them is detected by pressure gauge Y03, and the water pressure of the water inlet pipe of plate changer H01 is detected by pressure gauge Y04. The water pressure of the water inlet pipe of plate changer H02 is detected by pressure gauge Y03. The circulating pumps B01 and B02 are started to transport the hot water produced by electric boilers D01 and D02 to the corresponding plate changer H01 and H02 and circulate for reheating. The circulating pumps B03 and B04 are started to allow the water in the fire-fighting pipeline to enter the ring plate H01 or plate changer H02 to heat the water and then return it to the fire-fighting pipeline. When one group of electric boilers D01 and D02 and plate changer H01 and H02 is damaged, the other group can be switched for normal use to improve fault tolerance.

[0011] Preferably, the point pressure gauge assembly includes a point pressure gauge Y05 and a point pressure gauge Y06, both of which are installed on the fire-fighting pipe to detect the water pressure inside the fire-fighting pipe; the point pressure gauge Y05 and the point pressure gauge Y06 are both installed on the fire-fighting pipe. When it is found that the water pressure inside the fire-fighting pipe drops abnormally quickly in winter mode, the point model of the detection result will be quickly sent to the controller to improve safety.

[0012] Preferably, the make-up water pump assembly includes a make-up water pump B09, a make-up water pump B10 and a make-up water pump B11. The input ends of the make-up water pumps B09, B10 and B11 are all connected to the output end of the make-up water pipe. The make-up water pumps B09 and B10 replenish water for the water inlet pipe, and the make-up water pump B11 replenishes water for the electric boilers D01 and D02. When the water pressure of the water inlet pipe and the water outlet pipe drops, the make-up water pump B09 or the make-up water pump B10 is started to replenish water for the corresponding water inlet pipe. When the hot water pressure between the electric boiler and the corresponding plate heat exchanger drops, the make-up water pump B11 is started to supply water thereto, thereby improving convenience.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: in summer mode, the antifreeze unit is physically isolated from the fire-fighting pipe by the valve group and the fire-fighting unit provides stable pressure to the water inside the fire-fighting pipe, and the antifreeze unit stops running; in winter mode, the valve group physically isolates the fire-fighting pipe from the fire-fighting unit, and the antifreeze unit circulates and heats the water inside the fire-fighting pipe. When a fire occurs, the water in the fire-fighting pipe is extinguished in the winter mode, causing the water pressure to drop. The water supplied by the water supply unit is heated by the antifreeze unit and then replenished into the fire-fighting pipe. In winter mode, the intelligent control unit detects an abnormally rapid drop in the water pressure in the fire-fighting pipe, and the intelligent control unit controls the valve group to achieve physical isolation between the fire-fighting pipe and the antifreeze unit. At the same time, the fire-fighting unit provides fire-fighting water pressure to the fire-fighting pipe, thereby reducing energy consumption and improving maintenance convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0015] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example

[0016] like Figure 1 As shown, the dual-mode tunnel antifreeze and fire protection integrated intelligent unit of the present invention includes a fire protection unit, an antifreeze unit, a water supply unit, an intelligent control unit and a valve group. Fire-fighting unit, used for high-pressure water supply to fire-fighting pipelines; Antifreeze unit, used for circulating heating and heat preservation of water in fire protection pipes; Water supply unit, used to supply water to fire protection pipes and antifreeze units; The intelligent control unit monitors the water pressure inside the fire protection pipe in real time, enabling automatic switching from winter mode to summer mode; The valve group adjusts the direction of water flow to switch between summer mode and winter mode; The fire fighting unit includes a fire fighting water pump and a fire fighting pool. The fire fighting water pump includes a water supply main pump B07 and a water supply main pump B08. The input ends of the water supply main pump B07 and the water supply main pump B08 are both connected to the output end of the fire fighting pool, and the output ends of the water supply main pump B07 and the water supply main pump B08 are respectively connected to the fire fighting pipeline; The valve group includes electric valve F1, electric valve F2, electric valve F3 and electric valve F4. Electric valve F3 and electric valve F4 are set between the water supply main pump B07, water supply main pump B08 and the fire protection pipeline, and electric valve F1 and electric valve F2 are set between the fire protection pipeline and the antifreeze unit; The antifreeze unit includes an electric boiler, a plate heat exchanger, and a circulating pump. The electric valve F2 is installed on the water inlet pipe between the fire protection pipe and the plate heat exchanger, and the electric valve F1 is installed on the water outlet pipe between the fire protection pipe and the plate heat exchanger. The circulating pump is used to draw water from the fire protection pipe through the water inlet pipe into the plate heat exchanger for heating, and then re-deliver it to the fire protection pipe through the water outlet pipe. The electric boiler is used to provide a heat source for the plate heat exchanger. The water supply unit includes a pressure gauge assembly and a water supply pump assembly. The pressure gauge assembly monitors the pressure of the water inlet and outlet pipes and also monitors the water pressure between the electric boiler and the plate heat exchanger. The water supply pump assembly replenishes water to the fire protection pipe and the electric boiler based on the pressure gauge monitoring. The intelligent control unit includes a controller and a point pressure gauge assembly. The point pressure gauge assembly is used to detect the water pressure inside the fire protection pipe. The controller is used to forcibly close the electric valve F1 and the electric valve F2 and forcibly open the electric valve F3 and the electric valve F4.

[0017] In this embodiment, in summer mode, the staff closes the electric valve F1 and the electric valve F2 and opens the electric valve F3 and the electric valve F4, and the antifreeze unit is physically isolated from the fire-fighting pipe (green line). At the same time, the water supply main pump B07 and the water supply main pump B08 are started to transport the water in the fire-fighting pool to the fire-fighting pipe, thereby providing sufficient water pressure in the fire-fighting pipe. The water does not circulate in the fire-fighting pipe. In winter mode, the staff opens the electric valve F1 and the electric valve F2 and closes the electric valve F3 and the electric valve F4. The fire-fighting pipe is physically isolated from the fire-fighting unit. The water in the fire-fighting pipe enters the antifreeze unit under the action of its own gravity for heating. The heated water returns to the fire-fighting pipe under the action of the antifreeze unit, realizing the antifreeze unit circulating heating of the water in the fire-fighting pipe, realizing the antifreeze of the water in the fire-fighting pipe in cold winter weather. In winter mode, the staff opens the electric valve F1 and the electric valve F2 and closes the electric valve F3 and the electric valve F4, starts the electric boiler, and the electric boiler provides heat source for the plate heat exchanger. The circulation pump is started, and the water in the fire-fighting pipe is heated in the water inlet pipe. The water enters the plate heat exchanger under the action of the electric boiler (blue line) and the circulation pump. The heat source provided by the electric boiler heats the water in the plate heat exchanger. The heated water then returns to the fire protection pipe through the outlet pipe (red line), ensuring the heat preservation of the fire protection pipe water in winter and preventing the water in the fire protection pipe from freezing and becoming unusable during fire emergency water supply. When the pressure gauge assembly detects insufficient water pressure in the inlet and outlet pipes, or insufficient water pressure between the electric boiler and the plate heat exchanger, the staff activates the water supply pump assembly to replenish water to the inlet pipe and the electric boiler respectively to ensure that the pressure pipe does not trigger the control unit. In winter mode, if the point pressure gauge assembly detects an abnormally rapid drop in water pressure inside the fire protection pipe, the point pressure gauge assembly feeds the detection value back to the controller, which forcibly closes electric valves F1 and F2 and forcibly opens electric valves F3 and F4, automatically switching the fire protection system from winter mode to summer mode. The antifreeze unit shuts down and the fire protection unit immediately starts to provide the necessary fire protection water pressure to the fire protection pipe. Example

[0018] On the basis of Example 1, Figure 1 As shown, a dual-mode tunnel antifreeze and fire protection integrated intelligent unit of the present invention is based on Example 1, as shown in FIG. Figure 1 As shown, the fire fighting unit also includes a booster main pump B05 and an additional main pump B06, which are used to quickly transport water from the fire fighting pool to the fire fighting pipeline; The electric boiler includes an electric boiler D01 and an electric boiler D02, the pressure gauge assembly includes a pressure gauge Y1, a pressure gauge Y2, a pressure gauge Y3 and a pressure gauge Y4, the plate heat exchanger includes a plate heat exchanger H01 and a plate heat exchanger H02, and the circulating pump includes a circulating pump B01, a circulating pump B02, a circulating pump B03 and a circulating pump B04. The circulating pump B01 provides a driving force for the electric boiler D01 to supply hot water to the plate heat exchanger H01, and the circulating pump B02 provides a driving force for the electric boiler D02 to supply hot water to the plate heat exchanger H02. The pressure gauge Y01 detects the hot water pressure between the electric boiler D01 and the plate heat exchanger H01, the pressure gauge Y02 detects the hot water pressure between the electric boiler D02 and the plate heat exchanger H02, the pressure gauge Y03 detects the water pressure of the water inlet pipe of the plate heat exchanger H01, and the pressure gauge Y04 detects the water pressure of the water inlet pipe of the plate heat exchanger H02; The point pressure gauge assembly includes point pressure gauge Y05 and point pressure gauge Y06. Both point pressure gauge Y05 and point pressure gauge Y06 are installed on the fire protection pipe to detect the water pressure inside the fire protection pipe; The water supply pump assembly includes a water supply pump B09, a water supply pump B10 and a water supply pump B11. The input ends of the water supply pumps B09, B10 and B11 are all connected to the output end of the water supply pipe. The water supply pumps B09 and B10 supply water to the water inlet pipe, and the water supply pump B11 supplies water to the electric boilers D01 and D02.

[0019] In this embodiment, when the water supply main pump B07 and the water supply main pump B07 fail or the water delivery pressure is insufficient, the booster main pump B05 and / or the additional main pump B06 are started to improve the efficiency of replenishing the water tank and fire protection pipeline of the fire protection pool, and the circulating pump B01 and the circulating pump B02 are started to make the hot water produced by the electric boiler D01 and the electric boiler D02 be delivered to the corresponding plate heat exchanger H01 and the plate heat exchanger H02 and circulate for reheating, and the circulating pump B03 and the circulating pump B04 are started to make the water in the fire protection pipeline enter the ring plate H01 or the plate heat exchanger H02 to achieve water heating, and then return to the fire protection pipeline, and the electric boiler D01 and the electric boiler D02 and plate heat exchanger H01 and plate heat exchanger H02, when one group is damaged, the other group can be switched for normal use. Point pressure gauge Y05 and point pressure gauge Y06 are both installed on the fire-fighting pipe to detect the water pressure inside the fire-fighting pipe. When it is found that the water pressure inside the fire-fighting pipe drops abnormally quickly in winter mode, the point model of the test result will be quickly sent to the controller. When it is found that the water pressure of the water inlet pipe and the water outlet pipe drops, the water supply pump B09 or the water supply pump B10 is started to replenish water to the corresponding water inlet pipe. When it is found that the hot water pressure between the electric boiler and the corresponding plate heat exchanger drops, the water supply pump B11 is started to supply water to it.

[0020] The main functions achieved by the present invention are: 1. Precise temperature control: Through the cooperation of electric boilers and plate heat exchangers, the water temperature in the fire protection pipes can be precisely controlled, avoiding the problems of large temperature fluctuations and uneven temperature control in traditional heating methods.

[0021] 2. Reduce energy consumption: Only the heating unit is used during daily operation, and the fire-fighting unit is only activated in emergencies, significantly reducing system energy consumption.

[0022] 3. Improve reliability: With modular design, the fire protection pipelines are physically isolated from the fire protection units. Failure of a single device will not affect the operation of the entire system, reducing the overall failure rate.

[0023] 4. Easy maintenance: Daily maintenance is concentrated on core equipment such as heating units and fire-fighting units, eliminating the need for comprehensive inspection of pipelines, greatly improving maintenance efficiency.

[0024] Through the above technical solutions, the present invention effectively solves the problems of high energy consumption, difficult temperature control, and inconvenient maintenance in the existing technology, and provides an efficient, reliable and easy-to-maintain solution for winter anti-freezing of fire protection pipelines in northern tunnels.

[0025] The installation method, connection method or setting method of the dual-mode tunnel antifreeze and fire-fighting integrated intelligent unit of the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the ring plate is the abbreviation of the plate heat exchanger; the electric boiler and plate heat exchanger of the dual-mode tunnel antifreeze and fire-fighting integrated intelligent unit of the present invention are purchased on the market, and technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to pay creative labor.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dual-mode tunnel antifreeze and fire protection integrated intelligent unit, including a fire protection unit, an antifreeze unit, a water supply unit, an intelligent control unit and a valve group, characterized in that: Fire-fighting unit, used for high-pressure water supply to fire-fighting pipelines; Antifreeze unit, used for circulating heating and heat preservation of water in fire protection pipes; Water supply unit, used to supply water to fire protection pipes and antifreeze units; The intelligent control unit monitors the water pressure inside the fire protection pipe in real time, enabling automatic switching from winter mode to summer mode; The valve group adjusts the direction of water flow to switch between summer mode and winter mode.

2. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 1, characterized in that: The fire fighting unit includes a fire fighting water pump and a fire fighting pool. The fire fighting water pump includes a water supply main pump B07 and a water supply main pump B08. The input ends of the water supply main pump B07 and the water supply main pump B08 are both connected to the output end of the fire fighting pool, and the output ends of the water supply main pump B07 and the water supply main pump B08 are respectively connected to the fire fighting pipeline; The valve group includes electric valve F1, electric valve F2, electric valve F3 and electric valve F4. Electric valve F3 and electric valve F4 are arranged between the water supply main pump B07, water supply main pump B08 and the fire protection pipe, and electric valve F1 and electric valve F2 are arranged between the fire protection pipe and the antifreeze unit.

3. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 1, characterized in that: The antifreeze unit includes an electric boiler, a plate heat exchanger and a circulation pump. The electric valve F2 is installed on the water inlet pipe of the fire protection pipe and the plate heat exchanger, and the electric valve F1 is installed on the water outlet pipe of the fire protection pipe and the plate heat exchanger. The circulation pump is used to draw water from the fire protection pipe through the water inlet pipe into the plate heat exchanger for heating and then re-deliver it to the fire protection pipe through the water outlet pipe. The electric boiler is used to provide a heat source for the plate heat exchanger.

4. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 3, characterized in that: The water supply unit includes a pressure gauge assembly and a water supply pump assembly. The pressure gauge assembly monitors the pressure of the water inlet pipe and the water outlet pipe and monitors the water pressure between the electric boiler and the plate heat exchanger. The water supply pump assembly replenishes water to the fire protection pipe and the electric boiler according to the monitoring of the pressure gauge.

5. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 1, characterized in that: The intelligent control unit includes a controller and a point pressure gauge assembly. The point pressure gauge assembly is used to detect the water pressure inside the fire protection pipe. The controller is used to forcibly close the electric valve F1 and the electric valve F2 and forcibly open the electric valve F3 and the electric valve F4.

6. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 2, characterized in that: The fire fighting unit also includes a booster main pump B05 and an additional main pump B06, which are used to quickly transport water from the fire fighting pool to the fire fighting pipeline.

7. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 4, characterized in that: The electric boiler includes electric boiler D01 and electric boiler D02, the pressure gauge assembly includes pressure gauge Y1, pressure gauge Y2, pressure gauge Y3 and pressure gauge Y4, the plate heat exchanger includes plate heat exchanger H01 and plate heat exchanger H02, and the circulating pump includes circulating pump B01, circulating pump B02, circulating pump B03 and circulating pump B04. Circulating pump B01 provides driving force for electric boiler D01 to provide hot water to plate heat exchanger H01, and circulating pump B02 provides driving force for electric boiler D02 to provide hot water to plate heat exchanger H02. Pressure gauge Y01 detects the hot water pressure between electric boiler D01 and plate heat exchanger H01, pressure gauge Y02 detects the hot water pressure between electric boiler D02 and plate heat exchanger H02, pressure gauge Y03 detects the water pressure of the water inlet pipe of plate heat exchanger H01, and pressure gauge Y04 detects the water pressure of the water inlet pipe of plate heat exchanger H02.

8. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 5, characterized in that: The point pressure gauge assembly includes point pressure gauge Y05 and point pressure gauge Y06. Point pressure gauge Y05 and point pressure gauge Y06 are both installed on the fire protection pipe to detect the water pressure inside the fire protection pipe.

9. The dual-mode tunnel antifreeze and fire protection integrated intelligent unit according to claim 4, characterized in that: The water supply pump assembly includes a water supply pump B09, a water supply pump B10 and a water supply pump B11. The input ends of the water supply pumps B09, B10 and B11 are all connected to the output end of the water supply pipe. The water supply pumps B09 and B10 supply water to the water inlet pipe, and the water supply pump B11 supplies water to the electric boilers D01 and D02.

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