RU204366U1 - UNDERGROUND FIRE HYDRANT HEATING DEVICE - Google Patents

Abstract

The utility model relates to the field of fire safety, in particular, to restore the operability of an underground fire hydrant (hereinafter referred to as SG) frozen under the influence of low temperatures. The task of the utility model is to promptly restore the operability of a fire hydrant. The technical result is the creation and use of a portable device for warming up frozen SG to positive temperatures with the possibility of simultaneous supply of water for extinguishing the fire. The problem is solved and the technical result is achieved by creating and using a portable device consisting of flanged lower and upper bodies connected to each other, while the lower body of the device is the body of a fire column with a thread in the lower parts for mounting on a fire hydrant, and a plug is welded to the upper part of the upper body with inlet and outlet nozzles installed in it with hose heads welded to them for connecting pressure fire hoses in.

Description

The utility model relates to the field of fire safety, in particular, to restore the operability of an underground fire hydrant (hereinafter referred to as SG) frozen under the influence of low temperatures.

There are two known methods for warming up an underground fire hydrant. The first method is to heat the exhaust gases from a fire engine through a coil or heat exchanger mounted directly into the body of a fire hydrant (patent SU 1616686 A1).

The disadvantages of this device are:

- absence of coils and heat exchangers in most fire hydrants;

- low heat transfer from the coil to the metal parts of the hydrant;

- long heating time of the hydrant, due to the fact that heat transfer from the coil is carried out by heating the air in the hydrant;

- the design of the coil does not provide for heating the fire hydrant valve, without which there is no possibility of opening the fire hydrant.

The second way to defrost a fire hydrant is to supply water aerosol or steam to the fire hydrant well (patent SU 1775120 A1). Fire trucks with overheated water, with a temperature of 150-1800 ° C, began to be produced several years ago, respectively, their number does not exceed one percent of the total fleet of fire trucks. If the tee of the water supply network, where the valve is directly located, was filled with water and froze, then steam heating of the well will take a considerable time, which is one of the decisive factors in extinguishing a fire.

The task of the utility model is to promptly restore the operability of a fire hydrant.

EFFECT: creation and application of a portable device for warming up frozen steam generator to positive temperatures with the possibility of simultaneous supply of water for extinguishing a fire.

The problem is solved and the technical result is achieved by creating and using a portable device consisting of flanged lower and upper bodies, while the lower body of the device is a fire column body with a thread in the lower part for mounting on a fire hydrant, and to the upper part the upper body is welded with a plug with installed inlet and outlet pipes with sleeve heads welded to them for connecting pressure fire hoses.

A device for warming fire hydrants is shown in FIG. one.

A photograph of the claimed device is shown in FIG. 2 and FIG. 3.

The device consists of a lower body (1) and an upper body (2). The lower body (1) is the factory-made lower body of the fire pump, made in the form of a pipe, from which the key and the guide sleeve are removed. In the lower part of the body (1) there is a thread for installing the device on a fire hydrant (9). In the upper part of the lower body (1) there is a flange (3) for connection with the upper body (2). The upper casing (2) is installed instead of the upper casing of a factory-made fire pump; it is made of a pipe with a diameter of 89 mm to 108 mm and a height of 30 mm to 100 mm. A counter flange (4) is welded to the lower part of the body (2), which is similar to the flange (3) of the upper part of the body (1). The housings are mounted with flanges (3) and (4) through a sealing gasket (rubber o-ring for a fire column) using bolted connections. A plug (5) is welded to the upper part of the upper body (2). In the plug (5), the inlet (6) and outlet (7) branch pipes from a steel pipe with a diameter of 35 mm to 42 mm are mounted by welding. Hose heads (for example, GMN-50) (8) are welded to the branch pipes (6) and (7) for connecting pressure fire hoses. All body parts (2) and branch pipes (6) and (7) are made of steel with a wall thickness of at least 2 mm. The branch pipe (6) is designed to supply water from the fire tanker to the fire hydrant (9), and the branch pipe (7) is designed to remove water from the SG (9).

The branch pipe (6) inside the upper housing (2) of the device is made in the form of a pipeline with a length of 150 to 300 mm, it is made with a narrowing towards the mouth (10) to impart acceleration and directional movement to the water jet into the SG housing. The device is installed on a steam generator (9).

The device operates as follows.

The device for warming up the steam generator is installed on the steam generator and connected by hoses with a fire tanker. Water is supplied to the branch pipe (6) from a fire tank truck by a pump under a pressure of 0.1 MPa. Water from a tank with a temperature of +12 C ° to +25 C ° fills the body of the device and the steam generator (9) and then through the pipe (7) flows through the pressure fire hose into the fire truck or directly to extinguish the fire. After filling the device and SG (9) with water, the driver increases the pressure in the system to 0.6 MPa. At a given water pressure and with the help of a branch pipe (6), which has a narrowing towards the mouth (10), warm water reaches the lower unit of the steam generator (9) - valve (12), which usually freezes to the steam generator body (9). During the circulation of water, heat is transferred from the water to the steam generator body (9) and the valve (12). With the SG valve (12) closed, the SG drain (11) (9) is always open. When water appears from the drain hole (11), it can already be concluded that the steam generator is defrosting (9).

If it is necessary to supply water for extinguishing a fire, it is possible to supply water both for extinguishing the fire and for defrosting the SG, and after it is warmed up, it is necessary to install a fire tank truck on the SG through a fire hydrant, and extinguish the fire from an external fire-fighting water supply.

Before the first use and then annually, this device must be tested for tightness at a pressure of 1.5 MPa for 2 minutes. During operation and during maintenance, it is necessary to lubricate the threads of the housing 1 with lithol.

Similar devices and methods for warming fire hydrants have not been used in fire fighting equipment. The portable device for warming fire hydrants is "New" and is not known from patent and scientific and technical information.

Working drawings were made for the claimed device and a prototype was manufactured, which was successfully tested at the facilities of Gazprom transgaz Ukhta. In this regard, the claimed device meets the criterion "Industrial applicability".

Claims (1)

A device for warming up an underground fire hydrant, characterized by the fact that it consists of flanged lower and upper bodies, while the lower body of the device is a fire column body with a thread in the lower part for mounting on a fire hydrant, and welded to the upper part of the upper body plug with installed inlet and outlet nozzles with sleeve heads welded to them for connecting pressure fire hoses.

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