A kind of compressed air foam side spray release device and using method

Abstract

The invention relates to a compressed air foam side spraying and discharging device and a using method. Each discharging pipe is a straight pipe with one end being a closed end, the other end being open as a compressed air foam inlet, the pipe length L being 2 m to 20 m and the diameter D being 20 mm to 200 mm or a bent pipe with a certain radian; a plurality of rows of discharging holes with the distance d being 20 mm to 100 mm are evenly distributed in the surface of each discharging pipe; the hole diameter of the discharging holes is 1 mm to 30 mm; the included angle beta between the discharging holes ranges from 10 degrees to 35 degrees; the ratio of the area Al of the cross section of the foam inlet of each discharging pipe to the total area A2 of the cross sections of the corresponding discharging holes should meet the formula (please see the formula in the description); a foam branch pipe communicates with the two discharging pipes through connection pieces; and once a fire happens, a compressed air foam system provides compressed air foam for the discharging pipes according to set characteristic pressure, then the compressed air foam is evenly sprayed to a fire protection area through the discharging holes in different positions, and the beneficial effects that the device is simple in structure, safe and reliable, uniform in foam spraying, wide in protection range, convenient to install and use, high in foaming expansion rate, long in drainage time, high in stability and high in fire extinguishing efficiency are achieved.

Description

technical field [0001] The invention belongs to a compressed air foam dispensing device, in particular to a compressed air foam side spray dispensing device and a use method. Background technique [0002] Fixed compressed air foam fire extinguishing technology is a new type of foam fire extinguishing technology gradually developed in recent years. It generates foam by injecting air into the foam solution under positive pressure. The compressed air foam has a fine and uniform structure, long liquid separation time and high stability, and can cover the surface of the protected object for a long time. Compared with the existing water-based fire extinguishing technologies such as water spray and foam-water spray, compressed air foam has the following outstanding advantages: 1) It has high fire extinguishing efficiency for Class A fires and Class B fires, and the water consumption is small, and it will not Water damage occurs; 2) The foam performance is stable, with good "accumu...

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Problems solved by technology

[0004] However, the existing compressed air foam nozzles are mainly drooping nozzles, which cannot meet the actual application requirements of side spray nozzles in road tunnels, three-dimensional garages and other places.

For example, U.S. Patent US6328225 discloses a compressed air foam rotary nozzle, and Chinese patent CN201410707575.7 discloses a compressed air foam spraying method and nozzles. Under building ceilings, not suitable for side wall installation

Especially when it is used in special spaces such as three-dimensional shelves and garages, due to the occlusion of such places, when a fire occurs at the bottom or bottom, it is difficult for the foam to cover the fire source. If the layered arrangement is adopted, one is Due to the limitation of each partition space, there is a lack of space for arranging nozzles. Second, it affects the normal entry and exit of cars, goods, etc., and it is easy to cause collisions and damage the nozzles.

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