SU21833A1 - Automatic float valve with control load for fire water lines - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to automatic float valves with a regulating load for fire-fighting water pipes equipped with a shut-off member directly connected to the float.

The valve is designed to automatically release the water tank from the general water supply network when the fire fighting pump is put into operation.

In FIG. 1 shows a vertical section through a valve; FIG. 2 the same, in another form of implementation.

In-trunk injection pipe at the water tank includes a vertical cast-iron pipe A, the cherkez which water flows from bottom to top. Inside this nozzle there is a float B, a valve C and weights G connected between each other by a stem D. At the lower end of the nozzle there is a cone converging nozzle / tf that directs the water jet under the concave bottom of float B. for domestic purposes, the water jet is not sufficient to lift the float with superimposed loads, but with increased water supply to the network by the fire pump, the jet response increases and the float rises. Valve B stops water flow in. pressure tank, so that the reaction of the jet under

the bottom of the float stops and the fire pressure in the network keeps the valve closed until the pressure in the network drops, causing the valve to reopen under the pressure of the water in the tank.

To mitigate the hydraulic shocks that occur when VipHTOKa quickly cuts water into the tank, a special hydraulic buffer E is provided above the valve. When the piston of this buffer moves upwards, the holes in the walls alternate between the piston, causing the piston movement to slow down and also the water flow decreases. It is possible to use for the same purpose a safety valve 3 loaded with a spring for fire fighting (Fig. 2). With such a device at the time of closing the valve in, due to the inertia of the water masses, the water pressure will rise above the fireman, and the safety valve will discharge some water into the tank.

The subject matter of the invention.

1. Automatic float valve with control load for fire water boilers, equipped with a shut-off valve, directly

directly connected to the float, characterized in that in order to raise the float B and close the valve 5 in the vertical pipe A, which diverts water for domestic purposes, a conic, converging nozzle K, is used in the latter; | It is designed to bring water to the curved bottom, which is provided with the float B, and the structure produced

water pressure on the specified bottom of the float to change the position of the latter and valve B, depending on the pressure change in the network.

2. Application in the valve described in paragraph 1 or the E buffer buffer (Fig. 1) with the cylinder provided with bore holes) or the safety spring valve 3 (Fig. 2).