KR101433643B1 - A pressure reducing valve for fire fighting - Google Patents

Abstract

The present invention relates to a pressure reducing valve for firefighting and, more specifically, to a pressure reducing valve for firefighting which protects its inner components against heat and flame placed on the pressure reducing valves for firefighting. The present invention comprises: a passage pipe (52) connected to an inlet connected to the pressure reducing valve; a space (51) which encompasses the body of the pressure reducing valve, and makes the water flowed into the inlet pipe pass while being separated from a main firefighting waterway (54); a cooling jacket connected to the space and comprises a discharging pipe which discharges firefighting water from the space. The present invention protects the body of the valve from the flame when a fire breaks out.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure reducing valve for a fire,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure reducing valve for a fire, and more particularly, to a pressure reducing valve for protecting internal components from external heat and flame applied to a pressure reducing valve for a fire when a fire occurs.

Generally, the indoor sprinkler system and the indoor fire hydrant system in the fire protection system must satisfy the regulations that the radiation pressure of the fire water at each end should not exceed 12 kg / cm 2 (sprinkler) and 7 kg / cm ² (indoor fire hydrant) do. Generally, since the water pressure exceeding the prescribed pressure is supplied through the pump, for example, the decompression device must be depressurized before supplying the sprinkler or the indoor fire hydrant pipe, and then the fire water of the reference pressure according to the legal regulations must be supplied.

To this end, a pressure reducing valve is generally applied immediately before the sprinkler at each end or the indoor fire hydrant piping.

1 is a cross-sectional view of a generally used fire-fighting pressure reducing valve. 1, the conventional indoor decompression reducing valve includes an inlet 10, an outlet 20, a valve stem 30, an opening / closing plate 32, a pressure adjusting pipe 34, a height adjusting portion 36, A handle 40, and the like.

The fire water enters the inlet 10 in the direction of the arrow shown in the figure, and then is discharged to the outlet 20 through the inside of the valve. To explain the operation principle of the pressure reducing valve, the upper handle 40 is rotated to raise the opening / closing plate 32 attached to the valve rod 30, thereby opening the opening which is the passage through which the fire water moves. The fire water flowing in the inlet 10 passes through the opening in the inside and is discharged to the outlet 20. [ At this time, when the pressure of the fire-fighting water discharged to the discharge port 20 is high, the high-pressure fire-fighting water flows into the lower portion of the valve through the pressure control pipe 34 communicating with the discharge port 20 and the lower portion of the valve, . Since the height adjusting portion 36 is attached to the lower portion of the valve rod 30, the valve rod 30 is also lowered as the height adjusting portion 36 is lowered. As a result, the opening / closing plate 32 attached to the valve rod 30 is lowered to reduce the size of the opening, thereby controlling the amount of the water discharged. Thus, the pressure reducing valve shown in FIG. 1 is a valve capable of reducing the pressure of the fire water discharged to the discharge port.

However, a rubber material is used for a disk or the like in the structure inside the fire suppression reducing valve. When a fire is generated and the fire suppression valve is surrounded by a flame, such a rubber material causes serious damage due to high heat, and the fire suppression pressure reducing valve is damaged or broken. This is a very important issue related to the safety, durability and permanence of the pressure reducing valve.

Korean Patent No. 0727622 (Pressure Reducing Valve for Fire Protection) (Published on June 14, 2007)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure reducing valve for a fire extinguisher capable of protecting internal parts from a flame to provide excellent stability and durability.

The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description

In order to achieve the above object, the present invention provides a fire suppression reducing valve according to a preferred embodiment of the present invention, including a cooling jacket (50) for enclosing a pressure reducing valve body, wherein the cooling jacket A space portion 51 through which the fire-fighting water introduced into the inflow pipe passes, an inflow pipe 52 communicating with the inflow port, a space portion 51 separated from the fire-fighting water main passage W surrounding the pressure reducing valve body and flowing into the decompression valve, And a discharge pipe (54) communicating with the space portion and discharging fire water in the space portion to the outside, wherein the cooling jacket covers the pressure reducing valve body to protect the pressure reducing valve body from a flame when a flame is generated do.

According to a preferred embodiment, the discharge tube is clogged by a detachable safety cap.

According to a preferred embodiment, the safety stopper is made of a soft or rubbery plastic and has a structure that is deformed in shape by external heat and can easily escape from the discharge pipe.

As described above, the fire-fighting pressure reducing valve according to the present invention covers the valve body with a cooling jacket to protect the components inside the valve from external flames, so that the normal operation of the pressure reducing valve is achieved in the event of a fire or flame, Safety and durability.

Further, the safety stopper for closing the discharge pipe of the fire suppression reducing valve of the present invention is configured such that when the pressure reducing valve is caught in the flame, it can be easily detached by thermal deformation, so that the pressure reducing valve is automatically separated by the self- .

1 is a cross-sectional view of a conventional general fire suppression reducing valve;
2 is a cross-sectional view of a fire suppression valve according to a preferred embodiment of the present invention;
3 is a partially cutaway perspective view of a fire suppression valve according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fire-fighting pressure reducing valve of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of a fire suppression reducing valve according to a preferred embodiment of the present invention, and FIG. 3 is a partially cutaway perspective view of a fire suppressing reducing valve according to a preferred embodiment of the present invention.

2 and 3, the fire suppression valve of the present invention is provided with a cooling jacket 50 that surrounds the outside in order to protect weak internal components from flames. That is, the disc 32a of the opening / closing plate 32 coupled to the valve stem 30 is made of a rubber material in order to maintain airtightness, which is weak against the heat of a flame or the like. In order to protect weak internal components, a cooling jacket (50) for covering the pressure reducing valve body is installed in the present invention

The cooling jacket 50 includes an inflow pipe 52 through which the fire water flows, a space portion 51 surrounding the valve body, and a discharge pipe 54 through which the fire water is discharged. As shown in the figure, the space portion is surrounded by the valve body and is separated from the main oil passage W of the fire-fighting water flowing in the pressure reducing valve. In the drawing, arrows indicate the main oil passages W of the water-purifying water discharged to the discharge port 20 through the inlet port 10. The flow passages to the cooling jacket (flow passages to the cooling jacket are separated from the main oil passages W, ). The fire water flowing through the cooling jacket 50 flows through the inflow pipe 52 communicating with the inlet 10 and then flows into the internal space 51 surrounding the valve body to lower the temperature of the valve body, And is discharged to the outside through a discharge pipe 54 communicated with the discharge pipe 51.

In a normal case, a safety plug (not shown) is attached to the discharge pipe 54. The safety stopper may have a structure that allows the operator to insert or remove the discharge pipe, but it is more preferable that the fire suppression reducing valve is automatically removed from the discharge pipe by the heat when it is caught in the flame. For this purpose, the safety cap may be made of a soft or thermoplastic resin. In other words, it is preferable that it is made of a material which is weak to heat, so that the shape is deformed at a high temperature by the flame and is naturally released by the pressure of fire water in the discharge pipe. As a result, a new fire-fighting water flows naturally through the inflow pipe, cooling the valve body while passing through the space, and being continuously discharged to the discharge pipe.

It is needless to say that the inflow pipe 52 flowing into the cooling jacket 50 communicates with the inflow port 10 of the pressure reducing valve and is smaller than the inflow port 10. That is, most of the water is discharged through the inlet 10 to the outlet 20 through the pressure reducing valve, and only a small amount of water flows into the inlet 52 of the cooling jacket 50 to cool the pressure reducing valve.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied otherwise without departing from the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention, but are intended to be illustrative, and the scope of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

10: inlet
20: Outlet
30: valve stem
32: open / close plate 32a: disk (sealing)
34: Pressure regulating tube
36:
40: Handle
50: Cooling jacket
51: space portion
52: inlet pipe
54: discharge pipe
W: Fire-fighting water supply line

Claims (3)

In a fire suppression reducing valve,
And a cooling jacket (50) surrounding the pressure reducing valve body,
The cooling jacket (50)
An inlet pipe 52 communicating with an inlet port that is introduced into the pressure reducing valve,
A space portion 51 surrounding the pressure-reducing valve body and separated from a water-jetting water passage W flowing into the pressure-reducing valve, a space portion 51 through which water introduced into the inlet pipe passes, and
And a discharge pipe (54) communicating with the space portion and discharging fire water in the space portion to the outside,
Wherein the cooling jacket covers the pressure reducing valve body to protect the pressure reducing valve body from flames when a flame is generated. The method according to claim 1,
Wherein the discharge pipe is closed by a detachable safety cap. 3. The method of claim 2,
Wherein the safety stopper is made of a soft or rubbery plastic and is deformed in shape by external heat when the flame is generated and separated from the discharge pipe.

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