RU229815U1 - FIRE HYDRANT DE-DEFROSTER - Google Patents

Abstract

The utility model relates to technical means in the field of fire-fighting equipment and is intended to reduce the time of bringing fire hydrants or hoses into working condition, inside which, under the influence of low ambient temperatures and a technical malfunction of the hydrant valve tightness, ice plugs are formed, blocking the free passage of water. The operation of the utility model is implemented as follows: the declared defroster is connected to a fire hydrant with an ice plug in the internal cavity or a fire hose with an ice plug in a half-nut at the free end, then water under pressure, for example, from a fire truck, is supplied through a pressure hose (3) towards the hydrant or hose with an ice plug. Due to the high pressure and positive temperature of the water, thin jets of water through the holes of the cylindrical insert (5) melt the ice plug until it connects with the unfrozen cavity of the hydrant or hose. Excess water is removed through the holes (7) made in the half-nut (6). To protect against splashing, a protective cover (Fig. 5) made of dense fabric, for example, from a fire hose, is used. The utility model is a device consisting of a half-nut (1), a hose pressure head (2), a pressure hose (3), a coupling head strap (4), a cylindrical insert (5) with holes, a half-nut (6) with holes (7) for removing excess water.

Description

The utility model relates to technical means in the field of fire-fighting equipment and is intended to reduce the time it takes to bring fire hydrants or hoses into working order, inside which, under the influence of low ambient temperatures and a technical malfunction of the hydrant valve, ice plugs are formed, blocking the free passage of water.

The technical documentation of the manufacturers does not contain any specific recommendations for defrosting them (Tips Forms).

Well-known methods and technical solutions for using hoses and hydrants at sub-zero temperatures are proposed (“Guidelines for the Organization of Logistics of the Ministry of the Russian Federation for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters”. Appendix No. 43 “Procedure for Operating Fire Hoses”, approved by order of the Ministry of Emergency Situations of Russia dated 01.10.2020 No. 737). The guide prescribes: “After extinguishing a fire, water must be immediately drained from the pressure hoses. Pressure hoses frozen into ice should be warmed up with steam, hot air, or a compress of felt soaked in hot water should be used. Frozen hoses or sections of hoses can be brought to the exhaust pipe of a fire truck in order to warm both the hoses and the joints of the coupling heads with exhaust gases. Before storing the pressure hoses, the bends must be thawed. In case of continuous freezing of pressure hoses, their assembly should be carried out without bending or breaking them, and they should be transported on trucks with trailers or in another way, avoiding mechanical damage, laying the pressure hoses along their entire length. When extinguishing fires in low-temperature conditions, it is necessary to use the recommendations of the manufacturers of pressure hoses. All the listed methods are of a general nature without specifying how and with what technical means or mobile equipment to supply hot steam or air, especially when extinguishing fires in remote areas with poor road conditions. The use of hot steam or air provides for heating the outer surface of the hose, but does not ensure the removal of water from it. The use of hot steam leads to the deposition of water droplets on the surface of the hose, which can freeze after the steam supply is stopped. A felt compress provides local heating of the hose."

In addition to the well-known methods of preventing water from freezing in hoses and hydrants, there are many different technical solutions and methods.

The following solutions are known: the invention "Method for restoring the operability of a frozen fire hydrant after preservation and a device for implementing it" [Method for restoring the operability of a frozen fire hydrant after preservation and a device for implementing it, application: (21)4603426, (22)1988.11.09 (19)SU (11)1740014 (13)A1 (IPC A62C 2/00 2006.1)], the utility model "Device for warming up an underground fire hydrant" [Device for warming up an underground fire hydrant (21)2020142318, (22)2020.12.22 (19)RU (11)204366 (13)U1 (IPC A62C 35/20 2006.1)], Utility model "Heat-saving fire hose" [Heat-saving fire hose, application (21) 2012135895/12, (22)2012.08.22 (19)RU (11)123676 (13)U1 (IPC A62C 33/00 2006.1)], invention "Device for removing liquid from pipelines" [Device for removing liquid from pipelines, application: (21)3484596, (22) 1982.08.03 (19)SU (11)1079216 (13)A1 (IPC A01G 25/00 2006.1)], invention "Device for extinguishing a fire with superheated water" [Device for extinguishing a fire with superheated water, application: (21)5067910/12, (22)1992.10.06 (19)RU (11)2030194 (13)C1 (IPC A62C 33/00 2006.1)], invention "Device for thawing frozen fire hose connections" [Device for thawing frozen fire hose connections, application: (21)2907814, (22)1980.04.09 (19)SU (11)895453 (13)A1 (IPC A62C 33/00 2006.1)], invention "Method for thawing large-diameter pressure hoses at sub-zero temperatures while simultaneously removing residual water from them" [Method for thawing large-diameter pressure hoses at sub-zero temperatures while simultaneously removing residual water from them, application (21)2021118981, (22)2021.06.28 (19)RU (11)2778842 (13)S1 (MPK A62S 33/00 2022.02)].

The closest analogue to the presented utility model from the listed technical solutions and methods [Method for heating large-diameter pressure hoses at sub-zero temperatures while simultaneously removing residual water from them, application (21)2021118981, (22)2021.06.28 (19)RU (11)2778842 (13)C1 (IPC A62C 33/00 2022.02)]. The specified method for heating pressure hoses while simultaneously removing residual water from them is characterized in that it proposes mechanical displacement of residual water by using a wad of cylindrical shape, made in the form of a cone, pyramid, hemisphere or ellipsoid with an autonomous heat source placed inside in the form of soft packaging with a filler that generates heat when a chemical reaction is started. When using a prototype, additional material costs arise for purchasing a wad with an autonomous heat source, low heating speed and bringing the sleeve into working condition.

The technical result of the claimed utility model is the prompt (fast) restoration of the operability of the hose or hydrant, bringing it into working condition at low ambient temperatures.

The specified technical result is achieved by using the claimed utility model (Fig. 1), which consists of the following elements: a half-nut (1), a hose pressure head (2), (for example, an 80 mm hose head "GR Bogdanova" is taken), a pressure sleeve (3), a coupling of connecting heads (4), a cylindrical insert (5) with holes, a half-nut (6) with holes (7) for removing excess water.

The operation of the declared device is implemented as follows:

the stated defroster is connected to the hydrant with an ice plug in the internal cavity, then water under pressure, for example, from a fire engine, is supplied through the pressure hose (3) towards the hydrant or hose with the ice plug. Due to the high pressure and positive temperature of the water, thin streams of water through the holes of the cylindrical insert (5) melt the ice plug until it connects with the unfrozen cavity of the hydrant or hose. Excess water is removed through the holes (7) made in the half-nut (6). A protective cover (Fig. 5) made of dense fabric, for example, from a fire hose, is used to protect against splashing.

The diameter of the holes in the cylindrical insert (5) is in the range from 2 to 10 mm, their size and quantity do not have a significant effect on the applicability of the claimed device. For example (Fig. 6), 5 holes with a diameter of 3 mm are made in the cylindrical insert.

Practical application has shown the high efficiency of the declared model in defrosting hydrants and fire hoses in winter.

The novelty of the utility model is due to the fact that defrosting fire hydrants or hoses allows for the prompt restoration of the operability of fire-fighting equipment using water pressure, for example, from a fire truck.

Captions to figures

Fig. 1 - 3D projection of the utility model;

Fig. 2 - Drawing of a cylindrical insert;

Fig. 3 - Drawing of a half nut with holes;

Fig. 4 - Drawing of the utility model of the defroster in assembly;

Fig. 5 - Photo of a utility model of a defroster connected to a fire truck.

Fig. 6 - Photo of a cylindrical insert;

Fig. 7 - Photo of the use of a de-icer on a fire hydrant.

Claims (2)

1. A device for defrosting fire hydrants or fire hoses, consisting of a half-nut (1), a hose pressure head (2), a pressure hose (3), a coupling head fitting (4), a cylindrical insert (5) with holes, a half-nut (6) with holes (7) for removing excess water. 2. The device according to item 1, characterized in that during defrosting, to eliminate splashing of excess water under pressure, a protective cover is installed on the half-nut (6) with holes (7).