SU1358969A1 - Sprayer - Google Patents

Abstract

The invention relates to fire fighting equipment, specifically to supplying devices to a fire center of fire extinguishing compositions, mainly gas, and allows increasing the efficiency of the sprayer by improving the degree of spray in the volume and forming a volume spray with simultaneous control of the supply of fire extinguishant. The atomizer consists of a housing 1 with an inlet channel 2 and longitudinal grooves 3 for the passage of fire composition of its composition. In the housing, the insert 4 with the input cavity 5 and the windows 6 is mounted for rotation with the possibility of communication with the longitudinal grooves. A spray head 7 is attached to the insert. The longitudinal grooves on the side of the spray head are tucked into the sleeve 8 screwed into the housing. The insert has a diaphragm 10 interposed with the longitudinal grooves of the expansion chamber 9 and separating the extension gauge from the entrance cavity. the possibility of axial movement to change the expansion chamber volume. In the spray head, a cavity 11 and holes 12 are in communication with the expansion chamber to communicate the cavity 11 with the external medium. The volume of the expansion chamber is chosen larger than the volume of the longitudinal grooves and the inlet cavity of the insert. The total hole area of the spray head exceeds the cross sectional area of the expansion chamber. A seal 13 is installed between the housing and the insert, and a seal 14 between the sleeve 8 and the housing. The expansion chamber communicates with the longitudinal grooves through the holes 15 made in the insert 4. 4 Il. (L 00 sd 00 x C5i about

Description

The invention relates to fire fighting equipment, specifically to supplying devices to a fire center of fire extinguishing compositions, preferably gas.

The aim of the invention is to increase the efficiency of the sprayer by improving the degree of dispersion in the volume and forming a volumetric flame with simultaneous regulation of the supply of the extinguishing composition.

FIG. 1 shows a spray gun, a longitudinal section; in fig. 2 is the same, section A-A in FIG. one; in fig. 3 and 4 - the same, different position of the diaphragm.

The atomizer consists of a housing 1 with an inlet channel 2 and longitudinal grooves 3 for the passage of fire gas and its composition. In the housing it is centrally rotatable with an insert 4 with an entrance cavity 5 and windows 6 for communicating the entrance cavity with longitudinal grooves. A spray head 7 is attached to the insert. The longitudinal grooves on the side of the spray head are plugged with a sleeve 8 screwed into the housing. The insert has an expansion chamber 9 communicating with the longitudinal grooves and separating the expansion chamber from the entrance cavity with axial displacement to change the volume expansion cameras. In the spray head, a cavity 11 and openings 12 are in communication with the expansion chamber to communicate the cavity 11 with the external environment.

To accelerate the phase transformation process, for example, liquid (under pressure in the system) refrigerant compositions into gaseous, improve the degree of spraying and form a volumetric flame, using the effect of multi-stage expansion of the flow of the moving composition through the channels and cavities of the atomizer, the expansion chamber volume is chosen larger than the volume of the longitudinal grooves and the entrance cavity of the insert (the diaphragm is in the upper position). The total area of the orifices of the spray head, which are the last step of the moving stream spreading, is chosen larger than the cross-sectional area of the insert extension chamber. To improve the degree of dispersion of liquid compositions (water) by providing the necessary liquid head in front of the apertures by moving the diaphragm in the insert channel to the lower position, the volume of the expansion chamber is reduced and, equally, the flow parameters of the fluid in the longitudinal grooves are interrupted. flow.

A seal 13 is installed between the housing and the insert, and a seal 14 between the sleeve 8 and the housing.

five

0

five

0

five

0

five

Spreading is communicated with the longitudinal grooves through the holes 15 made in Box 4.

The spray works as follows.

The fire-extinguishing composition from the inlet channel 2 under pressure enters the input cavity 5 of the insert 4, and through the b windows in the insert 4 along the longitudinal grooves 3 of the housing 1 passes into the expansion chamber 9 and further into the cavity 11 of the head 7. Fire flame flame arches composition occurs when it exits through the holes 12 in the spray head 7.

The flow rate of the extinguishing agent in the sprayer is controlled by rotating the insert 4 in one direction or the other, while the windows 6 and the openings 15 of the insert 4 assume an intermediate position relative to the longitudinal grooves 3, changing the area of the spray section. When installing the spray gun at the beginning of the pipeline, the bore area should be maximized.

When installed in the middle part, the cross-sectional area takes on an average value, and when installed at the end of the pipeline, the through-passage area should also be maximum.

The acceleration of the phase transformation process, for example, liquid (under pressure in the system) refrigerants into gaseous is provided by multi-step expansion of the flow of extinguishing agent in the channels and cavities of the atomizer.

By setting the diaphragm in the lower position, they equalize the flow parameters in the longitudinal grooves and the expansion chamber, thereby interrupting the process of multi-stage flow broadening of the working medium and provide the required backwater in the cavity of the head in front of the holes to improve the degree of spraying of liquid.

Claims (1)

Invention Formula An atomizer comprising a housing with an inlet channel and longitudinal grooves for the passage of the extinguishing agent, concentrically mounted in the housing with the possibility 0 rotating an insert with an inlet cavity and windows for communicating the entrance cavity with longitudinal grooves and a spray head attached to the insert, characterized in that, in order to increase efficiency by forming a volume flame of the fire extinguishing composition, the insert is provided with an expansion chamber communicating with the longitudinal grooves and separating the expansion chamber from the entrance cavity with a diaphragm installed between them with the possibility of movement along the expansion chamber, while the longitudinal grooves with the sides of the spray head are plugged, and in the spray head, the cavity and openings communicate with the expansion chamber in communication with the cavity of the head with the external medium; the volume of the expansion chamber exceeds the volume of the longitudinal grooves and the entrance cavity of the insert, and the total area of the head apertures exceeds the cross-sectional area of the expansion chamber. 2 Fig.Z Aa Fig4