Residual water treatment device and method for a fire hose in a fire hydrant device

Abstract

To provide an apparatus and a method for treating residual water in a fire hose on a fire hydrant device which facilitate performing treatment of residual water in a fire hose on a fire hydrant device.SOLUTION: A apparatus for treating residual water in a fire hose 13 on a fire hydrant device 1 is an apparatus for treating residual water in a fire hose 13 on fire hydrant device 1 having the fire hose 13 accommodated in a housing, and includes: a suction apparatus 17 having a suction port 21 for generating suction force by a venturi effect caused by passing of fire extinguishing water supplied from a main pipe to the fire hydrant device 1; and a suction tube 19 for sucking residual water in the fire hose 13 by connecting the suction port 21 to the fire hose 13.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a residual water treatment device and method for a fire hose in a fire hydrant device.

Background Art

[0002] For example, a fire hydrant device installed in a tunnel or the like is equipped with a fire hose and is used to extinguish a fire generated by a fire extinguishing agent discharged from a nozzle through this fire hose. In such a fire hydrant device equipped with a fire hose, the fire hose is normally wound and stored in a device box and is pulled out from the device box and used when a fire occurs.

[0003] In the above fire hydrant device, the operation check of whether the predetermined discharge function and discharge performance are maintained during maintenance is basically performed by using a maintenance valve installed in front of the fire hose without passing water through the fire hose (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when a new fire hydrant device is installed or when there are special circumstances, a water discharge pressure test may be performed using the fire hose. After the inspection, since it is necessary to prevent freezing and the like, all of the fire hoses must be pulled out, the residual water in the fire hoses must be discharged, and then the fire hoses must be wound and stored. For this reason, there has been a problem that the restoration work after the above-mentioned water discharge pressure test takes time and effort.

[0006] The present invention has been made to solve such problems, and an object thereof is to provide a residual water treatment device and method for a fire hose in a fire hydrant device that can easily perform residual water treatment of the fire hose in the fire hydrant device.

Means for Solving the Problems

[0007] (1) The residual water treatment device for a fire hose in a fire hydrant device according to the present invention is a residual water treatment device for the fire hose in a fire hydrant device that houses the fire hose in a housing, and includes a suction device having a suction port that generates a suction force by a Venturi effect caused by passing fire extinguishing water supplied from a main pipe through the fire hydrant device, and a suction pipe that connects the suction port and the fire hose to suck residual water in the fire hose. It is characterized by the above.

[0008] (2) Further, the residual water treatment method for a fire hose in a fire hydrant device according to the present invention is a residual water treatment method for the fire hose in a fire hydrant device that houses the fire hose in a housing, and includes passing fire extinguishing water supplied from a main pipe through the fire hydrant device to a suction device that generates a suction force using the Venturi effect, and sucking out the residual water in the fire hose by the suction force of the suction device. It is characterized by the above.

[0009] (3) Further, the residual water treatment method for a fire hose in a fire hydrant device is a residual water treatment method for the fire hose in a fire hydrant device that houses the fire hose in a housing, and includes passing fire extinguishing water supplied from a main pipe through the fire hydrant device to a line proportioner, and sucking out the residual water in the fire hose by the suction force of the line proportioner. It is characterized by the above.

[0010] (4) Further, in the device according to (3) above, a first three-way valve is attached to the base end portion of the fire hose, a second three-way valve is attached to the tip side of the fire hose with respect to the first three-way valve, a drain pipe to which the line proportioner is attached is connected to the first three-way valve, and the second three-way valve and the suction port of the line proportioner are connected by a suction pipe, and water is passed through the line proportioner.

[0011] (5) Further, in the device according to (3) above, the fire hydrant device is a foam fire hydrant device including a chemical tank, a drain tank, a line proportioner as a mixer provided in a water supply pipe, a maintenance valve provided on the fire hose side of the line proportioner in the water supply pipe, and a chemical supply pipe connecting the chemical tank and the suction port of the line proportioner. The water passage on the fire hose side of the maintenance valve and the chemical supply pipe are connected, and by supplying water to the water supply pipe, the residual water in the fire hose is sucked out.

Effect of the Invention

[0012] In the present invention, by providing a suction device having a suction port that generates a suction force due to the Venturi effect caused by the passage of fire extinguishing water supplied from the main pipe through the fire hydrant device, and a suction pipe that connects the suction port and the fire hose and sucks the residual water in the fire hose, the residual water treatment of the fire hose in the fire hydrant device can be easily performed.

Brief Description of the Drawings

[0013]

Figure 1

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Mode for Carrying Out the Invention

[0014] [Embodiment 1] FIG. 1 schematically shows a fire hydrant apparatus in which a residual water treatment device for a fire hose according to the present embodiment is provided. As shown in FIG. 1, the fire hydrant apparatus 1 includes a fire hydrant valve 7 provided in a water supply pipe 5 connected to a main water supply pipe 3, an operation lever 9 for operating the fire hydrant valve 7, a maintenance valve 11 as a first three-way valve provided at the tip of the water supply pipe 5, a fire hose 13 forming a flow path from the maintenance valve 11 to a fire nozzle 15, and a fire nozzle 15 provided at the tip of the fire hose 13.

[0015] A residual water treatment device for the fire hose 13 according to an embodiment of the present invention is configured to treat the residual water in the fire hose 13 of the fire hydrant apparatus 1, and includes a suction device 17 that sucks the residual water in the fire hose 13 and a suction pipe 19 that connects the suction device 17 and the fire hose 13. Hereinafter, each component will be described in detail.

[0016] <Suction device> The suction device 17 includes a suction port 21 that generates a suction force by the Venturi effect caused by the passage of fire extinguishing water supplied from the main pipe through the fire hydrant apparatus 1. The suction device 17 has a throat portion with a narrowed flow path, such as a line proportioner, and an example is a device in which the suction port 21 is provided at the throat portion, but it is not limited thereto. The suction device 17 has a supply port 23 to which fire extinguishing water is supplied, and the supply port 23 and the maintenance valve 11 are connected by a supply pipe 25.

[0017] <Suction pipe> The suction pipe 19 connects the suction port 21 of the suction device 17 and the fire hose 13 to suck the residual water in the fire hose 13. In order to connect the suction pipe 19 to the fire hose 13, a three-way valve 27 as a second three-way valve is provided near the fire nozzle 15 in the fire hose 13.

[0018] Note that the suction device 17, the suction pipe 19, the supply pipe 25, the three-way valve 27, etc. may be installed in advance in the fire hydrant apparatus 1, or may be attached at the time of residual water treatment.

[0019] The operation of the residual water treatment device for the fire hose 13 of the present embodiment configured as described above will be described. The state shown in FIG. 1 is a state where, for example, during maintenance, fire extinguishing water is flowing through the fire hose 13. When the operation is confirmed with water flowing through the fire hose 13, fire extinguishing water remains in the fire hose.

[0020] When the suction device 17, the suction pipe 19, the supply pipe 25, etc. are not pre-attached, one end of the supply pipe 25 is connected to the maintenance valve 11, and the other end of the supply pipe 25 is connected to the suction port 21 of the suction device 17. Also, one end of the suction pipe 19 is connected to the three-way valve 27 provided in the fire hose 13, and the other end of the suction pipe 19 is connected to the suction port 21 of the suction device 17.

[0021] Then, as shown in FIG. 2, the sides of the maintenance valve 11 and the three-way valve 27 on the fire hose 13 side are closed, and the inside of the fire hose 13 is partitioned by the maintenance valve 11 and the three-way valve 27. However, it is preferable that the three-way valve 27 side is not completely closed but is slightly opened. In this state, the fire hydrant valve 7 is opened, and fire extinguishing water is sent to the suction device 17 via the maintenance valve 11. When the fire extinguishing water flows vigorously through the suction device 17, a suction force is generated at the suction port 21 due to the Venturi effect. Due to this suction force, the fire extinguishing water in the fire hose 13 is sucked through the suction pipe 19 and discharged from the suction device 17 to the outside.

[0022] Thus, according to the present embodiment, the residual water in the fire hose 13 can be easily drained with a simple device configuration.

[0023] [Embodiment 2] This embodiment relates to a method for treating residual water in the case of a foam fire hydrant device, and Fig. 3 shows the basic configuration in the state during monitoring. In Fig. 3, the same parts as those in Fig. 1 are denoted by the same reference numerals. In Fig. 3, the suction port 21 provided at the throat portion of the line proportioner 35 is not shown. The same applies to Figs. 4 to 11.

[0024] As shown in Fig. 3, the foam fire hydrant device 29 includes a chemical tank 31, a drainage tank 33, a line proportioner 35 as a mixer provided in the water supply pipe 5, a maintenance valve 11 provided on the fire hose 13 side of the line proportioner 35 in the water supply pipe 5, a hose shut-off valve 36 provided in front of the fire nozzle 15 in the fire hose 13, and a chemical supply pipe 37 connecting the chemical tank 31 and the suction port 21 of the line proportioner 35. Also, a three-way valve 27 is provided in the water supply pipe 5 between the maintenance valve 11 and the base end side of the fire hose 13, and the three-way valve 27 and the downstream side of the check valve 43 in the chemical supply pipe 37 are connected by a suction pipe 39. Furthermore, a chemical opening / closing valve 41 and a check valve 43 are provided in the chemical supply pipe 37. Also, the drainage tank 33 and the maintenance valve 11 can be connected by a drain pipe 45.

[0025] The method for treating residual water in the foam fire hydrant device 29 configured as described above will be described based on Fig. 4 showing the state during the drainage test and Fig. 5 showing the state during the residual water treatment. During the drainage test shown in Fig. 4, the fire hydrant valve 7 is opened, and fire water is supplied to the water supply pipe 5 and passes through the line proportioner 35. At this time, due to the Venturi action in the line proportioner 35, the chemical in the chemical tank 31 is sucked into the chemical supply pipe 37 and mixed with the fire water in the line proportioner 35, and is supplied as a mixed liquid to the fire hose 13 and the fire nozzle 15.

[0026] When the drainage test shown in Fig. 4 is completed, the mixed liquid remains in the fire hose 13. During the residual water treatment, as shown in Fig. 5, the maintenance valve 11 and the drain tank 33 are connected by a drain pipe 45, and this flow path in the maintenance valve 11 is opened. Also, the hose partition valve 36 and the chemical agent on-off valve 41 are closed, the water supply pipe 5 side of the three-way valve 27 is closed, and the flow paths of the fire hose 13 and the chemical agent supply pipe 37 are opened.

[0027] In this state, when the fire hydrant valve 7 is opened to allow water to flow through the water supply pipe 5, the fire extinguishing water is supplied and passes through the line proportioner 35. At this time, due to the Venturi action in the line proportioner 35, the residual water (mixed liquid) in the fire hose 13 is sucked out through the suction pipe 39 and mixed with the fire extinguishing water in the line proportioner 35. The mixed liquid is drained into the drain tank 33 through the flow path connecting the maintenance valve 11 and the drain tank 33.

[0028] Thus, according to this embodiment, by utilizing the functions of the foam fire hydrant device 29, the residual water treatment of the fire hose 13 can be easily performed. In the past, when treating the residual water in the fire hose 13, a hose was connected to the maintenance valve 11 and drained onto the road. Compared with this, the present embodiment is also excellent in that it is drained into the drain tank 33.

[0029] The other aspects of the above-described Embodiment 2 will be described below. <Other Aspect 1> Other Aspect 1 will be described with reference to Figs. 6 and 7. Fig. 6 shows the state during the test water discharge, and Fig. 7 shows the state during the residual water treatment. In the example shown in Figs. 3 to 5, the three-way valve 27 was provided on the downstream side of the maintenance valve 11. However, in Other Aspect 1, a partition valve 47 is provided instead of the three-way valve 27.

[0030] During the water discharge test shown in Fig. 6, the partition valve 47 is closed. And during the residual water treatment shown in Fig. 7, the partition valve 47 is opened and the fire hose 13 side in the maintenance valve 11 is closed. In this state, by opening the fire hydrant valve 7, residual water treatment can be performed in the same manner as in FIGS. 3 to 5.

[0031] <Another Aspect 2> Another Aspect 2 will be described with reference to FIGS. 8 and 9. Note that FIG. 8 shows the state during test water discharge, and FIG. 9 shows the state during residual water treatment. Another Aspect 2 is provided with a coupler 49 instead of the partition valve 47 in Another Aspect 1.

[0032] During the water discharge test shown in FIG. 8, the coupler 49 is kept disconnected. And during the residual water treatment shown in FIG. 9, the coupler 49 is connected and the fire hose 13 side of the maintenance valve 11 is closed. In this state, by opening the fire hydrant valve 7, residual water treatment can be performed in the same manner as in FIGS. 3 to 5.

[0033] <Another Aspect 3> Another Aspect 3 will be described with reference to FIGS. 10 and 11. Note that FIG. 10 shows the state during test water discharge, and FIG. 11 shows the state during residual water treatment. Another Aspect 3 is configured not to provide the partition valve 47 in Another Aspect 1 or the coupler 49 in Another Aspect 2, and instead switches the connection between the fire hose 13 and the suction pipe 39.

[0034] During the water discharge test shown in FIG. 10, the end of the suction pipe 39 is not connected. And during the residual water treatment shown in FIG. 11, the base end side of the fire hose 13 is connected to the suction pipe 39 and the fire hose 13 side of the maintenance valve 11 is closed. In this state, by opening the fire hydrant valve 7, residual water treatment can be performed in the same manner as in FIGS. 3 to 5.

Explanation of Reference Numerals

[0035] 1 Fire hydrant device 3 Main water supply pipe 5 Water delivery pipe 7 Fire hydrant valve 9 Operation lever 11 Maintenance valve 13 Fire hose 15 Fire nozzle 17 Suction device 19 Suction pipe 21 Suction port 23 Supply port 25 Supply pipe 27 Three-way valve 29 Foam fire hydrant device 31 Chemical tank 33 Drainage tank 35 Line proportioner 36 Hose shut-off valve 37 Chemical supply pipe 39 Suction pipe 41 Chemical on-off valve 43 Check valve 45 Drain pipe 47 Partition valve 49 Coupler

Claims

1. A method for treating residual water in a fire hose in a fire hydrant device that stores the fire hose in a housing, the method comprising passing fire extinguishing water supplied from a main pipe to the fire hydrant device through a line proportioner, and sucking out the residual water in the fire hose by the suction force of the line proportioner. A method for treating residual water in a fire hose in a fire hydrant device, characterized by the above.

2. A first three-way valve is attached to the base end of the fire hose, a second three-way valve is attached to the fire hose on the tip side of the first three-way valve, a water supply pipe with the line proportioner attached is connected to the first three-way valve, and the second three-way valve and the suction port of the line proportioner are connected by a suction pipe, and the line proportioner is passed through water. The method for treating residual water in a fire hose in a fire hydrant device according to claim 1, characterized by the above.

3. The fire hydrant device is a foam fire hydrant device including a chemical tank, a drainage tank, a line proportioner as a mixer provided in a water supply pipe, a maintenance valve provided on the fire hose side of the line proportioner in the water supply pipe, and a chemical supply pipe connecting the chemical tank and the suction port of the line proportioner. The water supply path on the fire hose side of the maintenance valve and the chemical supply pipe are connected, and the residual water in the fire hose is sucked out by supplying water to the water supply pipe. The method for treating residual water in a fire hose in a fire hydrant device according to claim 1, characterized by the above.

4. A fire hydrant device capable of treating residual water in a fire hose stored in a housing. It includes a line proportioner as a mixer provided in a water supply pipe, a first three-way valve attached to the base end of the fire hose, a second three-way valve attached to the fire hose on the tip side of the first three-way valve, and a suction pipe connecting the second three-way valve and the suction port of the line proportioner. Fire extinguishing water supplied from a main pipe is passed through the line proportioner, and the residual water in the fire hose is sucked out by the suction force of the line proportioner through the suction pipe. A fire hydrant device, characterized by the above.

5. A fire hydrant device capable of treating residual water in a fire hose stored in a housing. A chemical agent tank, a drainage tank, a line proportioner as a mixer provided in a water supply pipe, a maintenance valve provided on the fire hose side of the line proportioner in the water supply pipe, a chemical agent supply pipe connecting the chemical agent tank and the suction port of the line proportioner, and a suction pipe connecting a water supply path on the fire hose side of the maintenance valve and the chemical agent supply pipe. A fire hydrant device characterized in that the fire extinguishing water supplied from the main pipe is passed through the line proportioner, and the residual water in the fire hose is sucked out by the suction pipe by the suction force of the line proportioner.

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