SU89896A1 - The method of heating the water pumped by the fire pump in the winter - Google Patents

Description

The subject of the invention is a method of preheating water pumped by a fire pump in the winter time using the heat removed when the internal combustion engine is cooled to drive the pump.

A distinctive feature of this method is the removal of part of the water circulating in the cooling system of the internal combustion engine installed to drive the pump into the inlet of the fire pump, replenishing water loss in the engine cooling system by bypassing part of the water from the pump discharge pipe. In this case, during operation of the pump, the radiator is disconnected from the engine cooling system and empties from the water in it.

The use of this method prevents the water in the fire hoses and in the pump from freezing in winter.

FIG. 1 shows in two projections a device for carrying out a heating system for heating the water pumped by the fire pump in the winter, side view; in fig. 2 - the same in terms of.

According to this method, during the period of operation of the pump / cooling of hot water in the cooling system of the engine 2 is combined with the heating of cold water pumped by the autopump. At the same time, part of the hot water from the engine cooling system 2 (approximately / s) is introduced through the thermally insulated pipe 3 directly into the suction inlet 4 of the pump / and, mixing in cold water, heats it approximately P.

The loss of hot water in the cooling system is replenished with cold water supplied to the water pump 5 from the discharge pipe 7 of the pump.

The bubbling of hot water in the pump and the replenishment of the jacket of the engine 2 with cold water are controlled by taps S and P so as to ensure the cooling water temperature in the jacket of the engine 2 is level.

No. 89896

Switching operation from the system to another is carried out using cranes 8, 9 and 10, 13.

From the inoperative system, water is removed through the drain taps 11.

When feeding an autopump with water from an open reservoir (river, pond) in the suction inlet 4, a vacuum is created which facilitates the flow of hot water from the engine cooling system through conduit 3 to the pump.

If the autopump from the water supply hydrant is working, the pressure of the latter must be reduced, otherwise hot water from the cooling system will not go through the pipeline 3 to the nozzle 4 of the pump. To reduce the hydrant head, a valve 12 is mounted on the pump suction inlet 4, which partially blocks the passage of water and, in combination with a vacuum in the pump suction cavity, converts the static pressure of the hydrant before the valve to a velocity head after the valve, i.e. creates a vacuum.

In addition to the valve, the bubbling of hot water at the pump inlet can also be carried out using an ejector, which is connected in series between the suction pipe and pipe 4 instead of the valve. In this case, the hot water pipe 3 is connected to the vacuum chamber of the ejector.

In order to avoid engine clogging of the engine, a filter is installed in the connection of the pump outlet pipe by pipe 6.

Subject invention

Claims (2)

1. The method of heating the water pumped by the fire pump during the winter, in order to prevent the water in the piping and pump from freezing, is part of the water circulating in the cooling system of the internal combustion engine installed to drive the pump, sent to the suction inlet of the pump, and the loss of water in the engine cooling system is replenished by bypassing a portion of the water from the pump outlet. 2. A method according to claim 1, characterized in that during operation of the pump, the radiator is disconnected from the engine cooling system and emptied from the water in it.