KR102548392B1 - Underground fire fighting system - Google Patents

Abstract

The present invention relates to a firefighting device buried underground, which is formed in a box shape with an open top, buried in the basement, and a firefighting device box having a drain formed at the bottom; A cover portion installed to be openable and closed by a hinge on the top of the fire fighting device box and exposed to the ground; A hose reel unit composed of a hose reel stand coupled to the hose reel by a coupling that is connected to the valve unit by a connecting hose and rotatably supporting the disk, and a fire hose wound between the disks and having a nozzle; A cylinder part that is vertically fixed on both sides of the inner side of the fire fighting device box and connected to both sides of the hose reel support; It is characterized in that it includes; according to the underground fire-fighting device, the hose reel is installed inside the fire-fighting device box buried underground. If the cover is covered in the built-in state, fire extinguishing equipment such as a hose reel can be safely protected, and since the hose reel does not normally protrude to the ground, space utilization can be improved and the appearance is beautiful at the same time.

Description

Underground fire fighting system {Underground fire fighting system}

The present invention relates to an underground fire-fighting device in which a hose reel is built into a fire-fighting device box and buried underground in a market, a busy place, a sidewalk, a road, etc. When the cover is opened and the main valve installed in the fire extinguishing water pipe is opened, the hose reel part is automatically raised to the ground by the first cylinder and the second cylinder so that the fire can be quickly extinguished, and after extinguishing, the main valve is closed and When the drain valve is opened, the hose reel part is automatically lowered and accommodated by its own weight. .

In general, firefighting devices are intended to quickly extinguish a fire when a fire occurs, and these firefighting devices can be divided into fixed firefighting devices and mobile firefighting devices. Mobile firefighting devices include firefighting vehicles, pump vehicles, water tank vehicles, chemical vehicles, elevated and articulated ladder vehicles, unmanned waterproof tower vehicles, auxiliary vehicles, rescue vehicles, excavators, firefighting aircraft, and fireboats.

On the other hand, as a fixed firefighting device, a fire hose fixed to a wall or the ground and provided with fire extinguishing water, and a water gun or nozzle connected to the fire hose to spray fire extinguishing water at high pressure may be mentioned.

However, since the fixed fire extinguishing device is fixedly disposed on the wall and the ground, structurally, it has a problem in that it cannot operate normally when a fire occurs due to severe contamination or rust due to snow, rain, and dust for a long time. In addition, the space occupied by the fixed fire-fighting device fixed to the wall or the ground is large, and the space utilization is not good, and a safety accident occurs when people other than the fire-fighting manager arbitrarily manipulate the fixed fire-fighting device. In particular, when a firefighting device is exposed to the ground in a cultural property-related facility or temple, there is a concern that the surrounding aesthetics may be damaged by the firefighting device.

In order to solve these problems, the following patent document, Korean Patent Publication No. 10-2011-0114389, discloses that firefighting equipment that sprays fluids such as a water gun, an underground fire hydrant, and a hose reel are placed in the ground when a fire does not occur, and , In case of fire, the firefighting equipment placed underground is lifted to the ground to quickly extinguish the fire to improve space utilization, prevent firefighting equipment from being polluted or damaged by snow, rain and dust, and firefighting equipment as a firefighting manager A fire-fighting device designed to improve the performance of fire-fighting devices and make maintenance of fire-fighting devices easier by preventing others from operating them, and to prevent damage to the aesthetics of facilities such as cultural assets and temples by fire-fighting equipment has been

However, since the firefighting device of the prior art installs a transfer plate on the top of the first cylinder rod and arranges a hose reel with a fire hose wound on the top of the transfer plate, the lifting structure of the hose reel is structurally complicated. Since the height of the fire extinguisher box increases by half (½) the height of the hose reel and the cost increases, there is an inconvenient problem of having to bury the fire extinguisher box by digging more underground by half (½) the height of the hose reel during burial.

In addition, since the prior art firefighting device supports the hose reel by installing a separate rotation unit when the hose reel is installed on the top of the transfer plate, the structure for supporting the hose reel is structurally complicated and the rotation unit is installed. As a result, there was a problem in that the installation cost increased.

And the prior art firefighting device installed a drain valve on the drain pipe of the descending unit to drain the fluid filled inside the first cylinder and the second cylinder, but structurally, the drain valve drains all the water remaining in the cylinder and the connecting hose There was a problem in that it could not drain automatically, causing a risk of freezing in winter.

Publication No. 10-2011-0114389 (published date: 2011.10.19)

An object of the present invention was made to solve the conventional drawbacks as described above, and at normal times, the fire extinguishing equipment such as the hose reel part is safely covered by covering the hose reel part in a built-in state of the fire fighting equipment box buried underground. To protect the hose reel part from protruding to the outside, it is installed underground in places where fire extinguishing equipment cannot be installed on the ground, improving space utilization and providing an underground firefighting device with a beautiful appearance. are doing

In addition, the present invention, when the cover of the fire fighting device box is opened in case of fire and the main valve installed in the piping for fire extinguishing water is opened, the hose reel part is automatically raised to the ground by the elevation of the cylinder, and through this, the fire hose wound on the hose reel part It is to provide an underground fire-fighting device that can quickly extinguish a fire by holding a nozzle and moving to a fire place.

In addition, in the present invention, when the main valve is closed and the angle valve is opened after fire extinguishing, the hose reel part automatically descends by its own weight and is built into the fire fighting equipment box, and at the same time, underground burial to prevent freezing by remaining fire extinguishing water in winter It is to provide a fire extinguishing device.

In addition, the present invention is to provide an underground firefighting device that can lower the height of the firefighting device box and reduce installation costs by improving the elevating and supporting structure of the hose reel unit to a simple structure.

The present invention is formed in the form of a box with an open top in order to achieve the above object, a firefighting device box buried underground and having a drain hole formed at the bottom; A hose reel unit composed of a hose reel support connected to the valve unit by a connecting hose and rotatably supporting the disk, a hose reel support elevated by the cylinder unit, and a fire hose wound between the disks and having a nozzle; A cylinder part that is vertically fixed on both sides of the inner side of the fire fighting device box and connected to both sides of the hose reel support; It provides an underground firefighting device comprising a; valve unit installed inside the firefighting device box and supplying firefighting water to the fire hose of the hose reel unit.

The cover portion of the present invention, the cover frame installed on the upper rim of the fire fighting device; A cover installed to be opened and closed by a hinge on the cover frame; It is characterized in that it comprises; a hydraulic cylinder fixed to the inside of the fire fighting device box so that the cover is closed and the open state is fixed and the hydraulic cylinder rod is coupled to the cover.

The hose reel unit of the present invention includes a 'U'-shaped hose reel support in which coupling protrusions are integrally formed at both ends so as to be coupled to the second cylinder rod of the cylinder unit; A coupling installed on the hose reel support and having a connection pipe connected to the connection hose so that the fire hose can be wound between the disks; A plurality of disks rotatably installed in the coupling at a predetermined interval; It is wound between the disks and is connected to the valve unit and the connection hose; characterized in that it comprises a fire hose.

The cylinder portion of the present invention includes a plurality of first cylinders installed at a distance apart from each other inside the fire fighting equipment box; an elevating bar installed in the first cylinder rod of the first cylinder and the first cylinder rod of the first cylinder in a transverse direction to elevate and descend; A second cylinder fixed to the elevating bar and coupled to the second cylinder rod to the hose reel support of the hose reel unit; characterized in that it comprises a.

In the second cylinder of the present invention, one side is fixed to the elevating bar installed on the first cylinder rod of the first cylinder, and the other side is coupled to the lower part of the cylinder fixing body installed on the elevating bar and interlocks with the elevating movement of the first cylinder rod. It is characterized in that it is installed to be.

In the first cylinder and the second cylinder of the present invention, the first cylinder rod and the second cylinder rod are raised by the fire extinguishing water supplied to the connecting pipe through the main valve to raise the hose reel part, and fire extinguishing supplied to the main valve In the state where the water is shut off, the drain valve is opened to drain the fire extinguishing water of the first cylinder rod, the second cylinder rod, the branch pipe, the connection pipe and the supply pipe so that it is located inside the fire fighting device box by the weight of the hose reel part. to be

According to the underground fire-fighting device of the present invention, when the cover is covered while the hose reel is embedded inside the fire-fighting device box buried underground, it is possible to safely protect fire extinguishing equipment such as the hose reel, and the hose reel is usually on the ground. Since it does not protrude, it can improve space utilization and at the same time has a beautiful appearance.

In addition, in case of fire, when the cover of the firefighting equipment box is opened and the main valve is opened, fire extinguishing water is simultaneously supplied to the fire hose and cylinder, whereby the first cylinder and the second cylinder automatically raise the hose reel support of the hose reel part to the ground. Therefore, there is an effect of quickly extinguishing the fire by holding the nozzle of the fire hose wound around the plurality of disks and moving to the fire place.

In addition, when the main valve is closed after the fire is extinguished and the drain valve installed in the connecting pipe is opened, the fire extinguishing water supplied to the first and second cylinders is drained to the outside, whereby the first and second cylinders of the first and second cylinders are drained. As it descends by the weight of the cylinder rod and hose reel, it is automatically built into the fire extinguisher box and drains all fire extinguishing water remaining in the 1st cylinder, 2nd cylinder, connection piping, branch piping and supply pipe to prevent the risk of freezing in winter. There are possible effects.

In addition, in the present invention, since the fire hose is positioned up to the user's waist level by the first and second cylinders, the fire hose can be easily released to easily extinguish the fire, and it is easy to organize the fire hose after the fire is extinguished. There is an effect that can do it.

In addition, unlike the prior art, since the hose reel can be easily supported in an elevating manner without using a separate transfer plate and a rotation unit, there is an effect of structurally lowering the height of the fire fighting device and reducing installation costs.

1 is a view showing an installation state of an underground firefighting device according to the present invention by partially cutting it from the front.
Figure 2 is a view showing the installation state of the underground buried type fire-fighting device according to the present invention by partially cutting it from the side.
Figure 3 is a view showing the installation state of the underground fire-fighting device according to the present invention in a state in which the cover is removed from the plane.
Figure 4 is a view showing a state in which the underground fire-fighting apparatus according to the present invention is raised to the ground from the front.
Figure 5 is a side view showing a state in which the underground fire-fighting device according to the present invention has risen to the ground.

Hereinafter, an underground firefighting device according to the present invention will be described.

The underground firefighting device according to the present invention is formed in a box shape with an open top, buried underground, and a firefighting device box 100 having a drain hole 101 formed at the bottom, a valve unit 500, and a connecting hose 340 A coupling 320 connected to and rotatably supporting the disk 350 is installed, and a hose reel support 310 that is elevated by the cylinder portion is wound between the disk 350 and has a nozzle 361 Firefighting A hose reel part 300 made of a hose 360, a cylinder part 400 vertically fixed on both sides of the inner side of the fire fighting device box 100 and connected to both sides of the hose reel support 310, and a fire fighting device box ( 100) a valve unit 500 installed inside to supply fire-fighting water to the fire hose 360 of the hose reel unit 300; characterized in that it comprises a.

The technical configuration of the present invention will be described in detail according to the accompanying drawings of the underground buried firefighting device according to the present invention.

1 to 5, the underground firefighting device according to the present invention includes a firefighting device box 100, a cover portion 200, a hose reel portion 300, a cylinder portion 400, and a valve portion. Includes (500).

The firefighting device box 100 is formed in a box shape with an open top and buried in the ground. In addition, the firefighting device box 100 has a drain hole 101 formed at the bottom so that the soba water discharged by the drain valve 450 of the valve unit 500 is drained.

In the cover part 200, a cover frame 210 is installed along the upper edge of the fire fighting device box 100, a hinge is installed on one side of the cover frame 210, and a cover 220 is installed on the hinge. to open or close the firefighting device box 100, and a hydraulic cylinder 230 is installed in the firefighting device box 100 and the cover 220 so that the cover 220 can remain open or closed .

That is, the hydraulic cylinder 230 facilitates opening and closing of the cover 220 by hydraulic pressure.

In addition, a plurality of handles 221 are formed on the cover 220 of the cover part 200, and the plurality of handles 221 are located on the side of the cover 220 when not in use, and upward when using the handle Open the cover 220 in a state in which the hook or the operator holds it directly by hand in the lifted state.

When the cover 220 installed on the top of the firefighting device box 100 is opened, the hydraulic cylinder rod 231 rises by the hydraulic action of the hydraulic cylinder 230 while opening the cover 220 and maintaining the open state. And, when the cover 220 is closed, the hydraulic cylinder rod 231 is lowered by the hydraulic action of the hydraulic cylinder 230 and is gently closed by hydraulic pressure, as well as fixed in a closed state.

When opening and closing the cover 220, the user can open and close the cover 220 without exerting much force by the hydraulic action of the hydraulic cylinder 230.

In a state in which the cover 220 is closed, the position of the hydraulic cylinder 230 is changed according to the position of the hydraulic cylinder rod 231 installed on the cover 220.

The hose reel unit 300 has a hose reel support 310 installed in a 'U' shape so that it can be coupled to the second cylinder rod 431 of the second cylinder 430, and the hose reel support 310 A coupling 320 is installed, and a plurality of disks 350 are installed spaced apart on the coupling 320 so that the fire hose 360 is easy to unwind and wind, and a plurality of A fire hose 360 is wound between the disks 350 of the, and the fire hose 360 is connected to the angle valve 560 of the valve unit 500 and the connection hose 340 so that fire fighting water can be supplied. .

In addition, a connection pipe 330 is formed on one side of the coupling 320, and the connection pipe 330 transfers fire extinguishing water supplied from the angle valve 560 to a nozzle 361 installed on one side of the fire hose 360. ) A connection hose 340 made of the same material as the fire hose 360 is installed so that it can be supplied to extinguish the fire.

In the cylinder part 400, a plurality of first cylinders 410 installed at a distance from each other are installed inside the fire fighting device box 100, and the first cylinder rod 411 of the first cylinder 410 and the first cylinder 410 are installed. An elevating bar 420 is installed in the horizontal direction on the first cylinder rod 411 of the one cylinder 410 and installed to elevate, and the elevating bar 420 has a second cylinder 430 made of a pneumatic cylinder A cylinder holder 421 for fixing is installed, and a second cylinder 430 made of a pneumatic cylinder is installed in the cylinder holder 421, and the second cylinder rod 431 of the second cylinder 430 ) is fixed to the hose reel support 310.

In addition, a connection pipe 440 is installed in the first cylinder 410 of the cylinder part 400 . The connection pipe 440 connected to the first cylinder 410 is preferably made of any one of a material such as a metal material or a fire hose, and the connection pipe 440 is a site where the fire fighting device box 100 is installed. Depending on the situation, the material may be different.

In the first cylinder 410, the first cylinder rod 411 is raised by the fire extinguishing water supplied to the connection pipe 440 through the main valve 510 to raise the hose reel unit 300, and the main valve ( 510) by opening the drain valve 450 in a state in which the fire extinguishing water supplied to 510) is blocked to drain the fire extinguishing water of the first cylinder 410, the branch pipe 520, the connection pipe 440 and the supply pipe 550, The thrill part 300 is positioned inside the fire fighting equipment box 100 by its own weight.

A drain valve 450 is installed in the connection pipe 440 connected to the first cylinder 410, and the drain valve 450 is connected to the first cylinder 410 and the branch pipe 520 of the valve unit 500. ) and the firefighting water supplied to the supply pipe 550 is discharged.

In addition, when firefighting water is discharged through the drain valve 450, the first cylinder rod 411, which has been raised by the firefighting water, descends due to the weight of the hose reel unit 300.

In the valve unit 500, a main valve 510 is installed inside the fire fighting device box 100 to supply and block fire fighting water, and an elbow (unsigned) is installed on the discharge side where the fire fighting water is discharged from the main valve 510. A branch pipe 520 connected to ) is installed, a ball valve 530 is installed on the top of the branch pipe 520, and a rotation elbow 540 is installed on one side of the ball valve 530.

In addition, a supply pipe 550 is installed in the branch pipe 520, and an angle valve 560 is installed in the supply pipe 550 to supply or block firefighting water to the connection hose 340.

In addition, a connection pipe 440 in which a drain valve 450 is installed is connected to the elbow so that firefighting water can be supplied to the first cylinder 410.

The process of extinguishing a fire by supplying fire-fighting water through the underground fire-fighting device according to the present invention configured as described above will be described.

In order to use the underground firefighting device of the present invention, first, when the operator holds the plurality of handles 221 formed on the cover 220 in an upward direction by hand and lifts them upward, the hinge is rotated around the axis and the hydraulic pressure As the hydraulic cylinder rod 231 of the cylinder 230 is extended, the cover 220 is opened.

When the cover 220 is opened and the main valve handle of the main valve 510 is turned to supply firefighting water, the firefighting water flowing into the main valve 510 is supplied to the branch pipe 520 and connected to the pipe at the same time. 440, and the firefighting water supplied to the connection pipe 440 is supplied to the first cylinder 410 to raise the first cylinder rod 411.

As the elevating bar 420 of the first cylinder rod 411 rises, the plurality of second cylinders 430 rise, and at this time, the plurality of second cylinders 430 are hose reels used by the user to extinguish a fire. Holding the pedestal 310 and raising it upward, air flows into the second cylinder 430 and the second cylinder rod 431 rises, raising the hose reel pedestal 310 so that the fire hose 360 It is located up to the waist of the user so that it is convenient to use.

When holding and pulling the nozzle 361 of the fire hose 360 installed on the hose reel support 310 raised by the first cylinder 410 and the second cylinder 430, the fire hose 360 is coupled to the coupling 320 ) is released between the plurality of disks 350 by the rotation of

In the state where the fire hose 360 is released, aim the nozzle 361 at the part where the fire has occurred, and then turn the saddle valve handle of the angle valve 560 installed in the supply pipe 550 to fire the fire supplied through the main valve 510 Use water to extinguish the fire.

Since the pressure of the first cylinder 410 and the second cylinder 430 is maintained by the fire-fighting water supplied to the connection pipe 440 even when the fire-fighting water is continuously supplied in the process of extinguishing the fire, the hose reel The elevated state of section 300 is maintained.

That is, since the diameter of the branch pipe 520 is much smaller than the diameter of the discharge side of the main valve 510, the pressure of the fire extinguishing water supplied from the main valve 510 acts strongly to increase the pressure toward the connection pipe 440. It continues to act so that the state in which the hose reel unit 300 is raised to the ground is maintained.

When the fire is extinguished through the fire-fighting water supplied from the main valve 510, the angle valve 560 is closed and the connection hose 340 is disconnected to discharge the fire-fighting water remaining in the fire hose 360. After the fire hose 360 is wound between the plurality of disks 350 in a state where the water is completely discharged, the connection hose 340 is connected again.

In the state where the angle valve 560 is closed, the main valve handle of the main valve 510 is closed to cut off the supply of fire fighting water, and then the drain valve 450 installed in the connection pipe 440 is opened. At this time, in the state where the drain valve 450 is open, open the angle valve again or open the cap coupled to one side of the rotary elbow to open the branch pipe 520, the supply pipe 550, and the firefighting water remaining in the first cylinder 410. Make drainage easy.

As described above, when the first cylinder 410 is drained, the first cylinder rod 411 returns to the initial state by the weight of the hose reel 300 wound between the plurality of disks 350, and the fire fighting device box It descends toward the inside of (100).

At this time, when the user presses the hose reel support 310 towards the fire fighting device box 100, the second cylinder rod descends while discharging the air introduced into the second cylinder and descends so that the fire hose reel part is inside the fire fighting device box 100. to be located in

As described above, when the cover 220 is rotated and closed in a state where the hose reel part 300 is located in the fire fighting device box 100, the fire fighting equipment inside the fire fighting device box 100 is stored in a state where it is not exposed to the outside. .

In addition, when the cover 220 is closed, the firefighting equipment box 100 is kept closed by the hydraulic cylinder 230 installed across the firefighting equipment box 100 and the cover 220, so that the firefighting equipment is damaged by an outsider. can prevent it from happening.

As described above, according to the present invention, according to the underground firefighting device, when the cover is covered while the hose reel part 300 is built inside the firefighting device box 100 buried underground, the hose reel part 300 It is possible to safely protect the fire extinguishing equipment such as the back, and since the hose reel part 300 does not protrude to the ground in normal times, space utilization can be improved.

In addition, in case of fire, when the cover 220 of the fire fighting device box 100 is opened and the main valve 510 is opened, fire extinguishing water is simultaneously supplied to the fire hose, the first cylinder 410, and the second cylinder 430, thereby Since the first cylinder 410 and the second cylinder 430 automatically raise the hose reel support 310 of the hose reel part 300 to the ground, the fire hose 360 wound around a plurality of disks 350 ) Grab the nozzle 361 and move to the fire place to quickly extinguish the fire.

In addition, when the main valve 510 is closed after extinguishing the fire and the drain valve 450 installed in the connection pipe 440 is opened, the fire extinguishing water supplied to the first cylinder and the second cylinder is drained to the outside, thereby The first cylinder rod 411 of the first cylinder 410, the second cylinder rod 431 of the second cylinder 430, and the hose reel unit 300 automatically descend while descending by their own weight (100) In addition to draining all the fire extinguishing water remaining in the first cylinder 410, the second cylinder 430, the connection pipe 440, the branch pipe 520, and the supply pipe 550, the risk of freezing in winter can be prevented. can

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention.

100: fire fighting box 101: drain
200; cover 210: cover frame
220: cover 221: handle
230: hydraulic cylinder 231: hydraulic cylinder rod
300: hose reel part 310: hose reel support
320: coupling 330: connector
340: connecting hose 350: disk
360: fire hose 361: nozzle
400: cylinder part 410: first cylinder
411: first cylinder rod 420: lifting bar
421: cylinder fixture 430: second cylinder
431: second cylinder rod 440; connecting pipe
450: drain valve 500: valve unit
510: main valve 520: branch pipe
530: ball valve 540: rotation elbow
550: supply pipe 560; angle valve

Claims (6)

A firefighting device box 100 formed in a box shape with an open top, buried underground, and having a drain hole 101 formed at the bottom;
A cover portion 200 that is installed to be opened and closed by a hinge on the top of the firefighting device box 100 and exposed to the ground;
Between the hose reel support 310 and the disk 350, a coupling 320 is installed that is connected to the valve unit 500 and the connecting hose 340 and rotatably supports the disk 350, and is moved up and down by the cylinder unit A hose reel unit 300 made of a fire hose 360 wound on and having a nozzle 361;
A cylinder part 400 that is vertically fixed on both sides of the inner side of the fire fighting device box 100 and connected to both sides of the hose reel support 310;
A valve unit 500 installed inside the fire fighting device box 100 to supply fire fighting water to the fire hose 360 of the hose reel unit 300;
In the cylinder part 400, a plurality of first cylinders 410 installed at a distance from each other are installed inside the fire fighting device box 100, and the first cylinder rod 411 of the first cylinder 410 and the first cylinder 410 are installed. An elevating bar 420 is installed in the horizontal direction on the first cylinder rod 411 of the one cylinder 410 and installed to elevate, and the elevating bar 420 has a second cylinder 430 made of a pneumatic cylinder A cylinder holder 421 for fixing is installed, and a second cylinder 430 made of a pneumatic cylinder is installed in the cylinder holder 421, and the second cylinder rod 431 of the second cylinder 430 ) Is an underground firefighting device, characterized in that fixed to the hose reel support (310). According to claim 1,
The cover part 200,
A cover frame 210 installed on the upper edge of the fire fighting device box 100;
a cover 220 installed to be opened and closed by a hinge on the cover frame 210;
The cover 220 is fixed to the inside of the firefighting device box 100 so that the closed state and the open state are fixed, the hydraulic cylinder 230 to which the hydraulic cylinder rod 231 is coupled to the cover 220;
Underground fire-fighting device characterized in that it comprises a. According to claim 1,
The hose reel part 300,
A 'U' shaped hose reel support 310 integrally formed with coupling protrusions at both ends so as to be coupled to the second cylinder rod 431 of the cylinder unit 400;
A coupling 320 installed on the hose reel support 310 and having a connection pipe 330 connected to the connection hose 340 so that the fire hose 360 can be wound between the disk 350;
a plurality of disks 350 rotatably installed in the coupling 320 at a predetermined interval;
A fire hose 360 wound between the disk 350 and connected to the valve unit 500 and the connection hose 340;
Underground fire-fighting device characterized in that it comprises a. delete delete According to claim 1,
The first cylinder 410,
The first cylinder rod 411 is raised by the fire extinguishing water supplied to the connection pipe 440 through the main valve 510 to raise the hose reel unit 300,
In the state in which the fire extinguishing water supplied to the main valve 510 is blocked, the drain valve 450 is opened to extinguish the water of the first cylinder rod 411, the branch pipe 520, the connection pipe 440 and the supply pipe 550. Underground fire fighting device, characterized in that by draining the hose reel unit 300 to be located inside the fire fighting device box 100 by its own weight.

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