RU2186601C2 - Pulsed water supplying apparatus - Google Patents

Abstract

FIELD: fire-fighting equipment. SUBSTANCE: apparatus has liquid reservoir 1, high pressure chamber 2 with openings 8 and 9 in its wall, pulse forming device 3 made in the form mounting gun charged with cartridges free of bullets, lines 4 and 5 for supplying and discharge of liquid from high pressure chamber 2 and spray column 6 with nozzle 7. Pressure slide valve 13 is positioned in axial alignment with opening 9 inside high pressure chamber 2 and slide valve 15 in line 5. When high pressure chamber 2 is filled with liquid, slide valve 14 is opened and slide valve 15 is closed. Air replaced by liquid from high pressure chamber 2 is delivered into atmosphere via open slide valve 13 and opening 9. At the moment of shooting, slide valves 13 and 14 are closed under the action of gases delivered through opening 9, and slide valve 15 is opened to provide for communication between high pressure chamber 2 and spray column 6. Liquid is ejected through nozzle 7 onto strip of soil covering to be wetted. When pressure in high pressure chamber 2 drops, slide valves 13, 14 and 15 move to initial position. Apparatus of such construction is used for pulsed supplying of dispersed liquids to create wet soil zones on the path of spreading fire for localizing forest fires. EFFECT: simplified and compact construction and increased fire fighting efficiency. 1 dwg

Description

 The invention relates to fire fighting equipment, in particular to devices for the pulsed supply of dispersed liquids in order to form moistened zones of ground cover on the path of fire propagation during localization of forest fires of low and medium intensity.

 A device for pulsed supply of liquids, containing a reservoir of liquid, a high pressure chamber, a pulse shaper and lines for supplying and discharging liquid, the pulse shaper is made in the form of systems for preparing and igniting a combustible mixture, and the device is equipped with a cylinder with fuel [1].

 The known device cannot be performed in a portable version, since the presence of a cylinder with fuel, systems for preparing and igniting a combustible mixture makes it heavy and cumbersome, and the need to use a vehicle to deliver it to a fire site sharply narrows its scope, since a significant part of forest fires occurs in areas where access to vehicles is difficult or impossible.

 It is also known a device for pulsed supply of liquids containing a reservoir with a liquid, a high pressure chamber, a pulse shaper and lines for supplying and discharging liquid, while the pulse shaper is made in the form of systems for preparing and igniting a combustible mixture, and the device is equipped with a cylinder with a fuel and float valve with contacts to turn on the ignition system [2].

 This device has the same drawback.

 The objective of the invention is to reduce the overall dimensions of the device for a pulsed fluid supply.

 The technical result is achieved by the fact that in the device for pulsed supply of liquids containing a reservoir with a liquid, a high pressure chamber, a pulse shaper and lines for supplying and discharging liquid, according to the invention, two through holes are made in the walls of the high pressure chamber, aligned with one of them to the chamber a high-pressure pulse generator is docked on its outside, made in the form of a gun loaded with bullet-free cartridges, the device is additionally equipped with three pressure spools with spring-loaded plungers, one spool is placed inside the high-pressure chamber and its end part from the side of the spring cavity is docked coaxially to the second hole, the second spool is installed in the fluid supply line from the reservoir to the high-pressure chamber, the third spool is in the fluid withdrawal line from the high-pressure chamber , while the first and second spools are made normally open, and the third is normally closed.

 The drawing schematically shows a device for a pulsed fluid supply.

 The device for pulsed fluid supply contains a reservoir (shoulder rubber bag) 1 filled with fluid, a high pressure chamber 2, a pulse shaper 3, a fluid supply line 4 from the reservoir 1 to the chamber 2, and a fluid discharge line 5 from the chamber 2 ending with a spray barrel 6 nozzle 7. In the walls of the chamber 2, through holes 8 and 9 are made. Concentric to the hole 8, a pipe 10 is welded to the wall of the chamber 2 with longitudinal grooves 11 at its free end. The pulse shaper 3 is a gun for driving fasteners, for example nails, with a dismantled working piston, charged with cartouche charges, i.e. bulletless cartridges. The end of the barrel of the gun 3 is inserted inside the nozzle 10 and secured with a clamp 12 located in the area of the grooves 11, due to which the end of the nozzle 10 is able to compress and securely hold the gun 3 under the action of the tightening force of the clamp 12.

 The device is equipped with pressure spools 13, 14 and 15, each of which has a plunger and a cavity with a return compression spring located in it (not indicated). The spool 13 is placed inside the chamber 2 and its end part from the side of the spring cavity is docked to its wall coaxially with the hole 9. The spool 14 is installed in line 4, the spool 15 is in line 5. The channel 16 of the valve plug plunger 15 is made in the form of a transverse through hole. Due to the absence of a knee in this channel, the resistance to ejection of liquid from the chamber 2 is reduced. To prevent spontaneous rotation of the plunger of the spool 15 during operation, a lock 17 is provided. To turn on and off the supply of fluid from the reservoir 1 to the chamber 2, a valve 18 is built in line 4.

 Spools 13 and 14 are normally open, i.e. in the initial position does not prevent the outflow of fluid, and the spool 15 is normally closed (channel 16 in the initial position of the spool does not coincide with line 5).

 Device for pulsed fluid supply works as follows.

 Before starting work, the operator refills the tank 1 with liquid and charges the gun 3 with a bulletless cartridge. Then, having directed the barrel 6 in the desired direction, the valve 18 opens. The liquid from the tank 1 through line 4 through the spool 14 flows by gravity into the cavity of the chamber 2, forcing air out of it, which through the spool 13 and the hole 9 enters the atmosphere. The flow of fluid into the barrel 6 at this moment is excluded, since line 5 is blocked by the slide valve 15. When the first drops of fluid flowing out of the hole 9 appear, which indicates that the chamber 2 is sufficiently filled, the operator presses the trigger of the gun 3. As a result, the powder charge located in a bulletless cartridge, it ignites, and the resulting gases enter the cavity of the chamber 2 and create a high pressure in it, moving to the left (according to the drawing) the plunger of the spool 13, thereby eliminating the discharge of liquid through the hole 9. At the same time, the liquid under pressure acts on the spools 14 and 15. The plunger of the spool 14 moves to the right (according to the drawing), cutting off the reservoir 1 from the chamber 2 and preventing the backflow of liquid into it, and the plunger of the spool 15 down (according to the drawing), opening line 5 , through which the liquid from the chamber 2 through the channel 16 enters the barrel 6 and through nozzles 7 in the dispersed state is shot at the wetted strip of the ground cover. After the liquid is ejected from the chamber 2, the pressure in its cavity decreases to atmospheric, and the return springs move the plungers of the spools 13, 14 and 15 to their original position. Chamber 2 is filled with a new portion of liquid. The process is then repeated.

 When replacing the spray nozzle 7 with another one, capable of forming a compact stream of liquid, the device can also be used to extinguish individual foci of combustion.

Sources of information
1. US patent 3993582, CL B 01 J 13/00, 1976.

 2. A. p. USSR 820845, class A 62 C 19/00, 1979 (prototype).

Claims (1)

 A device for pulsed supply of liquids containing a reservoir with a liquid, a high-pressure chamber, a pulse shaper and lines for supplying and discharging liquid, characterized in that two through-holes are made in the walls of the high-pressure chamber, aligned one of them with the external pressure chamber a pulse former is docked on the side, made in the form of a gun loaded with bulletless cartridges, the device is additionally equipped with three pressure spools with spring-loaded plungers, one spool is located inside the high-pressure chamber and with its end part from the side of the spring cavity is docked coaxially to the second hole, the second spool is installed in the fluid supply line from the reservoir to the high-pressure chamber, the third spool is installed in the fluid withdrawal line from the high-pressure chamber, while the first and the second spools are normally open, and the third is normally closed.