RU2443445C1 - Stand for testing foam mixer - Google Patents

Abstract

FIELD: fire-fighting equipment.

SUBSTANCE: invention relates to fire safety equipment, namely, to devices for testing a stationary foam mixer ensuring supply of extinguishing agent into the fire area by a hose line. This is achieved by the fact that in the stand for testing foam mixer containing the measuring cup, whereon there is a transparent measuring tube and a fitting for connecting to the foam mixer, sensors of upper and lower levels are placed on the tube, which are connected to an electric seconds timer, a fitting of the measuring cup is designed for connection to foam mixer through the hose and the fitting for add-on tank, and for filling the tank with water from the water-system a filling tube is provided, and in case of water overflow from the tank the overflow pipe with a transparent tube is provided.

EFFECT: improved efficacy of fire-fighting due to testing the foam mixer operation with the help of the stand, which has sufficient stability, required in fire suppression systems.

1 dwg

Description

The invention relates to fire fighting equipment, and in particular to structures that supply a fire extinguishing substance to the combustion zone along the hose line.

The closest technical solution to the claimed facility is a stand (Recommendations on the design of an automatic sub-layer fire extinguishing system in reinforced concrete tanks and steel vertical tanks with a fixed and floating roof at the facilities of Transneft, Moscow, 1996, p. 20, Fig. 7 ; p.23, Fig. 10) containing a measuring tank on which a transparent measuring tube and a fitting are installed for connecting to the foam mixer (prototype).

A disadvantage of the known device is that it does not have sufficient stability necessary in fire extinguishing systems.

The technical result is an increase in the efficiency of fire fighting.

This is achieved by the fact that in the test bench for the foam mixer containing a measuring tank on which a transparent measuring tube and a fitting are installed for connecting to the foam mixer, the sensors of the upper and lower levels are connected to the tube, which are connected to the electric stopwatch, and the foam mixer is connected through the fitting for the attached tanks and a hose to the measuring tank, and for filling the tank with water from the water supply, a filling pipe is provided, and in case of overflow of water from the tank, an overflow pipe with a transparent pipe is provided.

The drawing shows a diagram of the stand for checking the foam mixer, which check the suction ability of the foam mixers.

The stand for testing the foam mixer consists of a measuring tank 1, on which a transparent measuring tube 2 is installed. On the tube are sensors of the upper and lower levels 3, which are connected to an electric stopwatch 4. The foam mixer 7 is connected through a fitting 6 for an attached tank and a hose 5 to the measuring tank 1. For filling the tank with water from the water supply, a filling pipe 8 is provided, and in case of overflow of water from the tank, an overflow pipe 9 with a transparent pipe is provided.

The stand for checking the foam mixer works as follows.

After the foam mixer is in operation, it is necessary to flush the system with water from an attached tank or a fire truck tank. Flushing the foam mixer is carried out with the crane open and the dispenser arrow set to maximum division. Flushing should continue for at least 5 minutes. In this case, there should be no leakage of water.

At the stand you can measure the time of emptying the measuring tank. With a known capacity (20 ... 25 l), the flow rate of the ejected liquid is determined and the obtained values are compared with standard values. Tests are allowed to be carried out on water. Standard values for the time of emptying a measuring container with water with a capacity of 25 l and the supply of ejected liquid for various foam mixers are calibrated.

The difference in fluid pressure in the pressure and suction cavities during the tests should be 0.5 MPa (5 kG / cm ² ), and the pump flow should approximately correspond to the flow of the solution through the foam shafts in the position of the arrow on the scale of the foam mixer.

It is possible to check the flow of the ejected foam liquid without a special installation. In this case, it is enough to have a measured capacity, a hose, a foam barrel and a stopwatch. The test procedure remains the same.

During the technical inspection, check the condition of the foam mixer and foam communications by external inspection. The crank handle and dispenser handwheel must rotate without jamming. Leakage of the foaming agent from the tank and through the connections of the tap on the pipeline from the tank to the foam mixer is not allowed.

Claims (1)

Foam test bench, containing a measuring tank, on which a transparent measuring tube and a fitting for connecting to the foam mixer are installed, the sensors of the upper and lower levels are placed on the tube, which are connected to an electric stopwatch, characterized in that the foam mixer is connected through a fitting for an attached container and a hose to the measuring tank, and for filling the tank with water from the water supply, an inlet pipe is provided, and in case of overflow of water from the tank, an overflow pipe with a transparent tube is provided.

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