JP7431055B2 - Tunnel disaster prevention equipment - Google Patents

Description

The present invention relates to tunnel disaster prevention equipment equipped with a water spray head, which is installed in a tunnel or the like through which vehicles pass.

Water spray equipment is installed in large-scale tunnels as tunnel disaster prevention equipment. Water spray equipment sprays a mist of water from a water spray head on fires that occur in tunnels to cool them down, suppress the fire's intensity, and prevent the fire from spreading. The water spray equipment in the tunnel disaster prevention equipment is a dry type in which the piping is not filled with water, and the water spray head is an open type that is open even when there is no fire. Therefore, there was a possibility that insects and dust could enter through the water spray port of the water spray head. One measure that is effective in preventing the inflow of insects and dust from the water spray nozzle is to attach a dustproof cap to the nozzle.

The dust-proof cap is attached to the spray nozzle of the water spray head and is automatically removed by the water pressure when spraying. However, in order to return the dustproof cap to its original position after the water spray equipment is activated and spraying is performed, manual installation work is required. Since a large number of water spray heads are installed in a tunnel, installation requires a great deal of labor and time. Spraying is done not only during fires but also during inspections. When installing water spray heads during inspections, it may be necessary to close the road to vehicles or impose traffic regulations. Road closures and traffic restrictions need to end as soon as possible. In addition, inspection is also performed when water spray equipment is installed, and at this time, it is also necessary to manually attach the dustproof cap.

Japanese Patent Application Publication No. 2007-267764 Japanese Patent Application Publication No. 2015-006578

Patent Document 1 describes a water spray head equipped with a dustproof cap. Further, Patent Document 2 describes a spray nozzle in which a dustproof cap is moved by water pressure to open a spray nozzle when discharging water, and when water is stopped, the dustproof cap is automatically returned by biasing a coil spring to close the spray nozzle. ing. However, in either technique, it is necessary to provide a dustproof cap for each spray nozzle, and it is also necessary to check the sealing status of the many spray caps. In particular, the technique disclosed in Patent Document 2 requires a complicated structure including a coil spring to be provided at each spray port, which requires high manufacturing and inspection costs.

An object of the present invention is to provide a tunnel disaster prevention equipment that does not allow insects, dust, or exhaust gas to enter through the spray port of the water spray head while solving the above-mentioned problem of the dustproof cap.

(1) The present invention provides a tunnel disaster prevention system that includes a pump that supplies water, a water spray head connected to the pump via a water supply pipe, and an automatic valve provided in the middle of the water supply pipe. The equipment includes a gas supply source that sends out a gas and a gas supply pipe that sends the gas, and when water is not being sprayed, the gas is supplied from the gas supply source to the water spray head via the gas supply pipe. The tunnel disaster prevention equipment is characterized in that the gas is discharged from the water spray head.

(2) Further, the present invention is the tunnel disaster prevention equipment according to (1), wherein the gas supply pipe includes a gas main pipe that sends the gas along the tunnel.

(3) Furthermore, the present invention is characterized in that a plurality of compartment facilities are provided in the tunnel, and each of the division facilities is provided with the gas supply source and a plurality of the water spray heads. This is tunnel disaster prevention equipment.

(4) Further, in the present invention, the water supply pipe includes a branch pipe to which the water spray head is connected, and the branch pipe supplies water to the water spray head during water spraying, and the gas supply pipe is characterized in that it includes a gas branch pipe to which the water spray head is connected, and the gas branch pipe supplies the gas to the water spray head without going through the branch pipe during non-water spraying. 1) or (3) tunnel disaster prevention equipment.

(5) Further, in the present invention, the water supply pipe includes a main pipe that sends water along a tunnel, and during non-water spraying, the gas is supplied from the gas supply source to the water spray head via the main pipe. The tunnel disaster prevention equipment of (1) is characterized by supplying the following:

According to the present invention, it is possible to provide tunnel disaster prevention equipment in which insects, dust, and exhaust gas do not enter through the spray port of the water spray head without using a dustproof cap.

Tunnel disaster prevention equipment of Example 1 installed in Tunnel 1. Tunnel disaster prevention equipment of Example 2 installed in tunnel 1. FIG. 3 is an enlarged view of the vicinity of the water spray head 22 in Example 2. Tunnel disaster prevention equipment of Example 3 installed in tunnel 1. Tunnel disaster prevention equipment of Example 4 installed in tunnel 1. FIG. 4 is an enlarged view of one section in Example 4.

FIG. 1 shows the tunnel disaster prevention equipment of Example 1 installed in a tunnel 1. Hereinafter, numbers in parentheses are not shown in the drawings because the configuration is complicated. The tunnel disaster prevention equipment includes water spray equipment (2), fire extinguishing equipment 3, notification equipment 4, fire detector 5, and disaster prevention reception board 6. The water spray equipment (2) also includes a water supply section (21), a water spray head 22, a gas supply section (23), and a control panel 24, and the water supply section (21) includes a pump 211, a water supply pipe (212) , an automatic valve 213. The water supply pipe (212) has a main pipe 2121, a first pipe 2122, a second pipe 2123, and a branch pipe 2124. The water spray head 22 includes two spray ports, a first spray port 221 and a second spray port 222, as will be described in detail in the second embodiment. The first spray port 221 sprays near the water spray head 22, and the second spray port 222 sprays far away. The gas supply section (23) includes an air compressor 231, a gas supply pipe (232), and a check valve 233. Air compressor 231 is a gas supply source. The gas supply pipe (232) includes a gas main pipe 2321, a gas pipe 2322, and a gas branch pipe 2323. In FIG. 1, the configuration of the gas supply section (23) is indicated by a dotted line to distinguish it from the configuration of the water supply section (21).

The tunnel 1 is provided with a plurality of sections, and for each section, the section equipment 7 includes a water spray head 22, a first pipe 2122, an automatic valve 213, a second pipe 2123, a branch pipe 2124, a gas pipe 2322, a check valve 233, Fire extinguishing equipment 3, reporting equipment 4, and fire detectors 5 are provided. Further, the disaster prevention receiving panel 6, the control panel 24, the pump 211, and the air compressor 231 are installed inside the building 8 outside the tunnel 1.

The pump 211 supplies water to the water spray head 22 via a water supply pipe (212). The pump 211 is installed in the building 8 and connected to a main pipe 2121 installed along the tunnel 1. The main pipe 2121 is connected to a plurality of first pipes 2122 provided for each division facility 7. The first pipe 2122 is connected to a second pipe 2123 via an automatic valve 213, and further connected to a branch pipe 2124 provided at the upper part of the tunnel 1. Branch pipes 2124 are provided along the tunnel 1 and are connected to ten water spray heads 22 provided at intervals of 5 m. The automatic valve 213 is electrically connected to a control panel 24 provided in the building 8, and when an operator of the control panel 24 performs an opening/closing control operation, a signal from the control panel 24 causes the automatic valve 213 to open and close. Opening/closing control is performed to control water spray from the water spray head 22.

The air compressor 231 shown in a dotted line frame in FIG. 1 sends air as a gas through a gas supply pipe (232) shown in a dotted line. The air compressor 231 is installed in the building 8 and connected to a gas main pipe 2321 installed along the tunnel 1. The gas main pipe 2321 is connected to a plurality of gas pipes 2322 provided for each division facility 7. The gas pipe 2322 is connected to the second pipe 2123 in the water supply pipe (212) via a check valve 233.

The fire extinguishing equipment 3 of the compartment equipment 7 is equipped with a fire hydrant and a hose, and the hose can be pulled out to spray water when extinguishing a fire. Further, the reporting equipment 4 is a push button, and by pressing the button, the occurrence of a fire is transmitted to the disaster prevention receiving panel 6. The fire detector 5 also detects a fire and notifies it to the disaster prevention receiving panel 6. The disaster prevention receiver panel 6 sends a signal to the control panel 24, and the control panel 24 controls the pump 211, the air compressor 231, and the automatic valve 213 provided for each compartment facility 7.

Next, the operation of the tunnel disaster prevention equipment of Example 1 will be explained.
During normal times, water is not sprayed from the water spray head 22 and there is no water in the branch pipe 2124 of the water supply pipe (212). During non-water spraying when water is not being sprayed, air, which is a gas, is released from all the water spray heads 22. This prevents insects, dust, car exhaust gas, etc. from entering through the spray port of the water spray head 22. At this time, the control panel 24 operates the air compressor 231, which is the gas supply source. Air sent out from the air compressor 231 passes through a gas main pipe 2321 provided along the tunnel 1 and is sent to a gas pipe 2322 provided for each compartment facility 7. During non-water spraying, all the automatic valves 213 are closed by a signal from the control panel 24, and air passes through the check valve 233 and enters the second pipe 2123. The water is then supplied to the water spray head 22 from the branch pipe 2124. When the air is supplied to the water spray head 22, the pressure is small and the air is discharged to the outside from the spray port. Air is supplied continuously, and air is continuously released from the spray ports of all the water spray heads 22 in the tunnel 1 at a strength that prevents insects, dust, and automobile exhaust gas from entering. .

No air is supplied during water spray from a fire. When a fire occurs in the tunnel 1, a fire detector 5 detects it, and a signal is transmitted to a disaster prevention receiver 6 to determine whether there is a fire. When the disaster prevention receiver panel 6 determines that there is a fire, it transmits a signal to the control panel 24, and the control panel 24 stops the air compressor 231 and operates the pump 211. Further, an open signal from the control panel 24 causes the automatic valves 213 to be opened in two adjacent compartment facilities 7 near the fire detector 5 that has detected the fire. Water sent out from pump 211 advances through main pipe 2121. Then, the water is sprayed from the plurality of water spray heads 22 through the first pipe 2122, automatic valve 213, and second pipe 2123 of the compartment equipment 7 with the automatic valve 213 open, and through the branch pipe 2124. At this time, the check valve 233 provided at the tip of the gas pipe 2322 prevents water in the second pipe 2123 from entering the gas pipe 2322. The first pipe 2122 is also connected to the fire hydrant of the fire extinguishing equipment 3, and if the fire hydrant is opened during water spraying, firefighting can be carried out in all compartment equipment 7 using the hose of the fire extinguishing equipment 3. The above-mentioned effect in the fire extinguishing equipment 3 is the same in Examples 2 to 4 described later.

When a spraying stop operation is performed on the control panel 24, the pump 211 is stopped. Then, when a restoration operation is performed on the control panel 24, the automatic valve 213 that was opened due to the fire closes, and the air compressor 231 is activated to return to the normal state in which air from all the water spray heads 22 is released.

If the fire spreads and the push button of the reporting equipment 4 is pressed in another area where the fire has spread, spraying is also performed in the vicinity of the reporting equipment 4 where the push button was pressed after the fire outbreak is confirmed. In this case, spraying from the water spray head 22 is performed in the compartment equipment 7 of the reporting equipment 4 whose push button was pressed and the three compartment equipment 7 on both sides thereof.

The same applies when inspecting tunnel disaster prevention equipment. At the time of inspection, the air compressor 231 is stopped by the control panel 24, the pump 211 is activated, and an open signal is sequentially sent to the automatic valves 213 of each compartment equipment 7 at predetermined intervals. As a result, the automatic valves 213 are sequentially opened, and water is sprayed from the water spray head 22 in order for each compartment facility 7. When the inspection is completed, an operation to stop spraying is performed from the control panel 24, and after the water is drained from the water supply pipe (212), the normal state is returned. Note that this point also applies to Examples 2 to 4, which will be described later.

FIG. 2 shows the tunnel disaster prevention equipment of Example 2 installed in the tunnel 1. Unlike the first embodiment, a gas pipe 2322 branched from a gas main pipe 2321 is connected to a gas branch pipe 2323. The gas branch pipe 2323 is installed along the branch pipe 2124 and is connected to the plurality of water spray heads 22 . The other configurations are the same as in the first embodiment.

FIG. 3 is an enlarged view of the vicinity of the water spray head 22 in the second embodiment. The water spray head 22 is provided above the side of the tunnel as shown in FIG. The water spray head 22 is provided with two spray ports, a first spray port 221 and a second spray port 222, toward the center of the tunnel 1, and each sprays water near and far from the water spray head 22. . Further, a branch pipe 2124 is connected to the water spray head 22 via a water pipe check valve 214 , and a gas branch pipe 2323 is connected to the water spray head 22 via a trachea check valve 234 . In FIG. 3, the gas branch 2323 passes behind the water pipe check valve 214 and extends to the adjacent water spray head 22.

Note that the tracheal check valve 234 is a check valve for passing gas only from the gas branch pipe 2323 to the water spray head 22 side, and the water pipe check valve 214 is a check valve for passing gas only from the branch pipe 2124 to the water spray head 22 side. It is a check valve to allow water to pass through. Since the flow rate flowing through the gas branch pipe 2323 is smaller than the amount of water flowing through the branch pipe 2124, the gas branch pipe 2323 can use a much thinner pipe or tube than the branch pipe 2124. Note that the relationship in size between the piping for passing gas and the piping for flowing water described in other embodiments is also the same.

Next, the operation of the tunnel disaster prevention equipment of Example 2 will be explained.
During non-water spraying, which is the normal time, when water is not being sprayed, air is discharged from all the water spray heads 22 as in the first embodiment. This prevents insects, dust, car exhaust gas, etc. from entering through the spray port of the water spray head 22. At this time, the control panel 24 operates the air compressor 231, which is the gas supply source. Air sent out from the air compressor 231 passes through a gas main pipe 2321 and is sent to a gas pipe 2322 provided for each compartment facility 7. Air is then supplied from the gas branch 2323 to the water spray head 22 via the tracheal check valve 234. At this time, water pipe check valve 214 is closed, preventing air from entering branch pipe 2124 and reducing air pressure.

When the air is supplied to the water spray head 22, the pressure is small, and the air is discharged to the outside from the first spray port 221 and the second spray port 222. Air is continuously emitted from the first spray port 221 and the second spray port 222 at a strength that prevents insects, dust, and automobile exhaust gas from entering.

Air is not supplied during water spray due to fire or inspection. Control by the control panel 24 at the time of fire or inspection is the same as in the first embodiment, and the air compressor 231 is stopped and the pump 211 is activated. The water sent out from the pump 211 passes through the main pipe 2121, reaches the first pipe 2122 provided for each compartment equipment 7, and proceeds to the first pipe 2122 of the compartment equipment 7 where the automatic valve 213 is open. Then, water is sprayed from the automatic valve 213 through the second pipe 2123, through the branch pipe 2124, and from the first spray ports 221 and second spray ports 222 of the plurality of water spray heads 22. At this time, the tracheal check valve 234 provided between the gas branch pipe 2323 and the water spray head 22 prevents water from entering the gas branch pipe 2323.

In the second embodiment, since the gas branch pipe 2323 can be made thinner, the amount of gas to be supplied can be reduced. Furthermore, the gas branch pipes 2323 may be configured to have an inner diameter that gradually becomes smaller as they move away from the gas pipe 2322, or by using orifices with different opening diameters between each water spray head 22 and the gas branch pipes 2323. , the minute pressure of air in each water spray head 22 can be adjusted to be equal.

FIG. 4 shows the tunnel disaster prevention equipment of Example 3 installed in the tunnel 1. Unlike Examples 1 and 2, Example 3 does not have a gas supply pipe (232) used for supplying air, and supplies air to the water spray head 22 using a water supply pipe (212). Air compressor 231 is connected to main pipe 2121 via check valve 235.

Next, the operation of the tunnel disaster prevention equipment of Example 3 will be explained.
During non-water spraying, which is the normal time, when water is not being sprayed, air is released from all the water spray heads 22 as in the first and second embodiments. This prevents insects, dust, car exhaust gas, etc. from entering through the spray port of the water spray head 22. At this time, the control panel 24 operates the air compressor 231, which is the gas supply source. After passing through the check valve 235, the gas sent out from the air compressor 231 is sent through the main pipe 2121 to the first pipe 2122 provided for each compartment facility 7. In normal times, the automatic valves 213 of each compartment facility 7 are all opened by a signal from the control panel 24. Therefore, in all the compartment facilities 7, air is supplied from the automatic valve 213 to each water spray head 22 via the second pipe 2123 and branch pipe 2124, and is discharged from the first spray port 221 and the second spray port 222. Ru. Gas is continuously emitted from the first spray port 221 and the second spray port 222 with a strength that prevents insects, dust, and automobile exhaust gas from entering.

Air is not supplied during water spray due to fire or inspection. Control by the control panel 24 at the time of fire or inspection is the same as in the first and second embodiments, and the air compressor 231 is stopped and the pump 211 is activated. The water sent out from the pump 211 is sent to the first pipe 2122 provided for each division facility 7 through the main pipe 2121. At this time, the check valve 235 prevents water from entering the air compressor 231. Then, the water advances to the first pipe 2122 of the compartment equipment 7 where the automatic valve 213 is open, passes from the second pipe 2123 to the branch pipe 2124, and is sprayed from the water spray head 22. At this time, the automatic valve 213 is opened only in the specific compartment equipment 7, unlike when it is fully opened in normal times. Therefore, water is sprayed while maintaining the water pressure.

In the third embodiment, since air is supplied to the water spray head 22 through the water supply pipe (212), air can be supplied without the gas supply pipe (232) such as the gas main pipe 2321.
This third embodiment is a system suitable for a tunnel with a small number of sections and a short overall length.

FIG. 5 shows the tunnel disaster prevention equipment of the fourth embodiment installed in the tunnel 1, and FIG. 6 is an enlarged view of one section in the fourth embodiment. FIG. 6 shows the main parts of the compartment equipment 7 and the lower main pipe 2121. Although the gas branch pipe 2323 is provided as in Example 2 (FIGS. 2 and 3), the gas main pipe 2321 laid along the tunnel 1 does not exist. Instead, each of the compartment facilities 7 is provided with a plurality of nitrogen gas cylinders 236 as a gas supply source for emitting nitrogen gas. In FIG. 6, the lid provided on the installation portion of the nitrogen gas cylinder 236 and the lid provided on the installation portion of the automatic valve 213 and the like are omitted. Nitrogen gas from the nitrogen gas cylinder 236 is connected to the water spray head 22 via a gas pipe 2322, a gas branch pipe 2323, and a plurality of tracheal check valves 234.

Next, the operation of the tunnel disaster prevention equipment of Example 4 will be explained.
During non-water spraying, which is the normal time, when water is not being sprayed, the electric gas valves 237 connected to all the nitrogen gas cylinders 236 are opened in response to a signal from the control panel 24. Then, nitrogen gas is supplied from the gas pipe 2322 to the water spray head 22 via the gas branch pipe 2323 and the tracheal check valve 234, and the nitrogen gas is released from the first spray port 221 and the second spray port 222. This prevents insects, dust, and exhaust gas from entering through the first spray port 221 and the second spray port 222.

In the event of water spraying due to fire or inspection, the electric gas valve 237 closes in response to a signal from the control panel 24 to stop the supply of nitrogen gas. Then, as in the second embodiment, the pump 211 operates and sprays from the main pipe 2121 through the first pipe 2122, automatic valve 213, second pipe 2123, branch pipe 2124, and water pipe check valve 214 in the compartment equipment 7. Water is supplied to the water spray head 22, and water is sprayed from the first spray port 221 and the second spray port 222. In the fourth embodiment, in order to detect the remaining amount of the nitrogen gas cylinder 236, a measuring means such as a pressure gauge is provided in the nitrogen gas cylinder 236, and the numerical value of the measuring means can be automatically measured on the control panel 24 side. good. Alternatively, when the remaining amount of the nitrogen gas cylinder 236 becomes low, a different display than usual may be displayed on a display section provided in the fire extinguishing equipment 3 or the like. A watchman of the tunnel 1 can know that the remaining amount of the nitrogen gas cylinder 236 has decreased by driving through the tunnel 1 and checking this display section. Note that a communication unit may be provided in equipment such as the fire extinguishing equipment 3 to send a decrease signal to the control panel 24 located outside the tunnel 1 when the remaining amount of the nitrogen gas cylinder 236 decreases.

<Modified example>
In Examples 1 to 3, air was used as the gas released from the spray nozzle during non-aqueous spraying when water was not sprayed, which is the normal time, but nitrogen may be used as in Example 4. When nitrogen is used, including in Example 4, a nitrogen generator can be used as the gas source. In particular, in the third embodiment, the gas accumulated in the main pipe 2121 and the like is discharged from the water spray head 22 during the initial period when water is supplied by the pump 211. Therefore, it is preferable to use nitrogen, which does not contain oxygen, as the gas to be normally released. Further, a special gas may be used as the gas emitted from the water spray head 22. Examples of special gases include gases that have an insecticidal effect and gases that have been added with fragrances to repel insects. By using such a gas, it is possible to prevent insects from entering the water spray head 22, and the overall insect-proofing effect of the tunnel 1 is improved.

Further, in Examples 1 to 4, gas was supplied continuously, but it may be supplied intermittently at regular intervals. In that case, the air compressor 231 may be operated intermittently, or a gas valve may be provided in the gas pipe 2322 to sequentially supply gas to each section. By supplying gas to each section, high pressure can be temporarily supplied to the water spray head 22, so even if insects or dust get inside the water spray head 22, they can be blown away. Furthermore, continuous supply and intermittent supply can be performed alternately. Moreover, even if the gas is continuously supplied, high pressure and low pressure gas may be supplied alternately.

1 tunnel, (2) water spray equipment, (21) water supply section, 211 pump, (212) water supply pipe, 2121 main pipe, 2122 first pipe, 2123 second pipe, 2124 branch pipe, 213 automatic valve, 214 Water pipe check valve, 22 Water spray head, 221 First spray port, 222 Second spray port, (23) Gas supply section, 231 Air compressor, (232) Gas supply pipe, 2321 Gas main pipe, 2322 Gas piping, 2323 Gas branch pipe, 233 Check valve, 234 Tracheal check valve, 235 Check valve, 236 Nitrogen gas cylinder, 237 Electric gas valve, 24 Control panel, 3 Fire extinguishing equipment, 4 Notification equipment, 5 Fire detector, 6 Disaster prevention receiver panel , 7 section equipment, 8 building

Claims (5)

a pump that supplies water;
a water spray head connected to the pump via a water supply pipe;
In the tunnel disaster prevention equipment equipped with an automatic valve provided in the middle of the water supply pipe,
A gas supply source for delivering gas and a gas supply pipe for delivering the gas are provided,
Tunnel disaster prevention characterized by supplying the gas from the gas supply source to the water spray head via the gas supply pipe and releasing the gas from the water spray head when water is not being sprayed during normal times . Facility. the gas supply source is an air compressor;
The tunnel disaster prevention equipment according to claim 1, wherein the gas supply pipe includes a gas main pipe that sends the gas along the tunnel. Multiple compartment facilities are installed inside the tunnel.
2. The tunnel disaster prevention equipment according to claim 1, wherein each of the partition equipment includes the gas supply source and a plurality of the water spray heads. The water supply pipe includes a branch pipe to which the water spray head is connected,
The branch pipe supplies water to the water spray head during water spraying,
The gas supply pipe includes a gas branch pipe to which the water spray head is connected,
The tunnel disaster prevention device according to claim 2 or 3, wherein the gas branch pipe supplies the gas to the water spray head without going through the branch pipe during non-water spraying when water is not being sprayed. Facility. The water supply pipe includes a main pipe that carries water along the tunnel;
The tunnel disaster prevention equipment according to claim 1, wherein the gas is supplied from the gas supply source to the water spray head via the main pipe during non-water spraying when water is not sprayed .

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