The spray liquid and a fire extinguisher with spray

 

(57) Abstract:

The invention relates to a technique of spraying liquid and can be used in fire extinguishing systems, and technological equipment for the combustion of fuel for heat and transport, as well as to hydrate the environment. The invention is directed to the creation of fine gas-droplet stream with a cross-section in the shape of an ellipse and a uniform intensity distribution. The spray liquid is made in the form of a housing with two coaxial channels of the same cross-section, intended to counter the fluid, and a nozzle having the shape of a conical diffuser. The inlet of the cone formed by the intersection of the inner surfaces of the channels forming the nozzle surface. The diffuser is oriented transversely of the channels and the area of its inlet does not exceed the total cross-sectional area of the channels. The fire extinguisher is equipped with a spray liquid of the described construction, contains a liquid reservoir for fire fighting system liquid displacement, the pipeline connecting the liquid cavity of the container with the dispenser, and at least one faucet or valve to control podchinennosti spray the liquid over the entire surface of a given area. 2 C. and 13 C.p. f-crystals, 2 Il.

The invention relates to a technique of spraying liquid and can be used in fire extinguishing systems, and technological equipment for the combustion of fuel for heat and transport, as well as to hydrate the environment. The invention as a fire extinguisher can be used in the composition of the stationary and mobile systems for extinguishing fires at various sites: in the premises of hospitals, libraries, museums, boats, airplanes, etc.

Currently, there are various types of spray liquid used in fire technology.

So, for example, from the description to author's certificate SU 1220703 A, B 05 B 1/14, publ. 30.03.86 known spray liquid, comprising a spray nozzle counter-percussion. These nozzles are made in the form of end-to-end in pairs oppositely directed channels. These channels are inclined to the axis of symmetry of the housing of the spray channels. In this case the angle between the axes of symmetry of the channels is selected in the range from 30 to 150o. This constructive design of spray reduces energy consumption as a dispersion liquid, and its dispersion in the surrounding spaces of the patent RU 2111033 C1, A 62 C 31/02, publ. 20.05.98. Known spray contains nozzles, located in rows on the outer surface of the housing. Each nozzle is formed by two coaxial channels of equal cross section, serving to counter the fluid, and a nozzle formed overlapping the outer conical groove surface coaxial channels. The inlet of such a nozzle is formed by the intersection of the inner surfaces of cylindrical channels forming the nozzle conical surfaces. Spray the described construction allows you to create a uniform volume flow drops fine spray size from 30 to 150 μm. However, this solution is aimed at generating a fine spray of drops in the volume of the environment, and not on the creation of a directed stream of droplets of a given size with a specific cross-section that is necessary, for example, to effectively extinguish the hearth fire. This requirement is important when using the spray liquid in the composition of the fire extinguisher.

In addition, there are various types of fire extinguishers, equipped with a spray liquid. These extinguishers include, for example, spruce contains a spray of liquid fire, made in the form of the outlet pipe of the siphon tube, the capacity of the liquid system liquid displacement cylinder for compressed gas provided from a gas cavity capacity, and the siphon tube through which fluid is delivered to the atomizer. This solution is aimed at improving the efficiency of fire at the expense of maintaining the required pressure, providing emission of the total weight of extinguishing agent. However, this device does not have any means to direct a fine spray stream of a given cross-section and means necessary for controlling the supply of liquid fire.

The closest analogue patentable fire extinguisher is a device that is described in the application DE 2635531 A1, A 62 C 31/02, publ. 09.02.78. Known extinguisher contains a spray of liquid in the form of a mouthpiece, a liquid reservoir for fire fighting system liquid displacement cylinder of compressed gas, a pipeline connecting the liquid cavity capacity with spray, and valves for controlling the supply of liquid to the atomizer. This solution though is aimed at increasing the effectiveness of fire suppression (due to simultaneous paspaley fluid into the environment.

Patentable invention is directed to a device to generate a gas-droplet flows given spatial configuration that can be used to effectively extinguish fires with portable fire extinguishers - fire extinguishers. The achievement of the technical result is associated with an increased uniformity and accordingly the intensity of the spray liquid over the entire surface of a given area.

Solved by the invention of the task aimed at obtaining the required technical result is to create using the tools of fine gas-droplet stream with a cross-section in the shape of an ellipse. Such cross-sectional shape of the directed stream of droplets can effectively spray with a given intensity, large and small squares with a sequential movement of the nozzle along the surface of the fire.

The achievement of the technical result is ensured by the fact that in the spray liquid, made in the form of a housing with two coaxial channels of the same cross-section, intended to counter the fluid, and a nozzle, the input otverstie the present invention, the nozzle has the shape of a conical diffuser, oriented across channels, the area of the inlet of the diffuser does not exceed the total cross-sectional area of the channels.

In a preferred embodiment, the design of the spray angle between the axis of symmetry of the channel and the axis of symmetry of the conical surface forming the diffuser ranges from 89 to 91o. In this case, achieving a symmetric distribution of fine droplets of spray flow area of its cross section.

It is advisable, from a technological point of view, the channels run in a cylindrical shape.

The most uniform distribution of droplets in the generated flow is achieved in the case of the choice of the angle at the vertex of the cone, forming a cone, from 30 to 90o.

Preferably, the diffuser atomizer was formed a tapered hole is made in the case. In this case simplifies the manufacturing technology of spray.

This technical result is achieved by using a fire extinguisher, containing the spray liquid, the liquid capacity for fire fighting system liquid displacement, the pipeline connecting the liquid cavity of the container with the dispenser, and at least one faucet or clickety made in the form of a housing with two coaxial channels of the same cross-section, designed to counter the fluid, and a nozzle, the inlet of which is formed by the intersection of the inner surfaces of the channels forming the nozzle surface, the nozzle has the shape of a tapered cone and oriented transversely of the channels and the area of the inlet of the diffuser does not exceed the total cross-sectional area of the channels.

In preferred versions of this fire extinguisher is the angle between the axis of symmetry of the channels of the nozzle and the axis of symmetry of the conical surface forming the diffuser can range from 89 to 91othe channels of the dispenser may have a cylindrical shape, the angle at the vertex of the cone, forming a diffuser atomizer, can last from 30 to 90oand diffuser atomizer can be formed in a tapered hole is made in the case.

It is advisable that the system liquid displacement extinguisher contained the siphon tube installed in the cavity of the vessel for the message of the liquid cavity with spray liquid.

As the fluid fire extinguishing preferably used water with a foaming agent.

To improve the efficiency of displacement of fluid from the tank it m the SF6.

System liquid displacement can be fitted with dividing elastic membrane separating the gas cavity capacity from its liquid cavity. This embodiment eliminates the interaction of the gas pressurization tank with the displaced liquid.

The invention is illustrated by the specific example and the attached drawings, which depict:

in Fig. 1 is a schematic cross-section of the fire extinguisher and connected to the dispenser;

in Fig. 2 is a cross-section of the nozzle in the region of the inlet of the diffuser in an enlarged scale (doubled).

The spray liquid is shown in Fig. 1 and 2, includes a housing 1, which is made of two coaxial cylindrical channel 2 is designed to counter the fluid. The spray nozzle is made in the form of a conical diffuser 3, formed by a tapered bore in the body 1, and is oriented transversely of the channels 2. The angle between the axis of symmetry coaxial cylindrical channels 2 and axis of symmetry of the conical surface forming the diffuser 3 is 90o(taking into account technological error 30'). The angle at the vertex of the cone, forming the diffuser 3 40o.

Whatnoticals surface. The area of the inlet of the diffuser 3 is 0.7 of the total cross-sectional area of the channels 2.

A fire extinguisher with spray-described construction, includes also the capacity of 4 with liquid fire, which is preferably water is used with the addition of the foaming agent. Capacity 4 consists of the liquid 5 and the gas 6 cavities. System liquid displacement contains the siphon tube 7, through which operated valve 8, and includes a spring-loaded locking element 9 and the control lever 10 provided with a flexible pipe 11. Case 1 atomizer is installed in the pipe 12, the cavity which is in communication with the liquid cavity 5 of the vessel 4 through the siphon pipe 7, valve 8, and a flexible conduit 11.

In the composition of the liquid filling the container 4 can be entered additive volatile liquid, such as liquefied carbon dioxide (CO2) or sulfur hexafluoride (SF6), to improve the efficiency of displacement of the liquid from the tank 4. To avoid interaction of the gas pressurization tank 4 with the liquid can additionally be installed separating the flexible membrane (not shown).

The working fluid sprinkler and fire extinguisher, sybreed fluid under pressure ~1 MPa working pressure range from 0.3 to 3 MPa) in the form of two opposing streams, which collide in the area of the inlet of the diffuser 3. In the interaction of opposing streams flowing through the inlet of the diffuser, the cross-sectional area that is less than the total area of the inlet channels 2, is cavitation of the fluid in the flow. In the process of flowing the fluid through the diffuser 3 is formed spray a fine stream with an elliptical cross-section. As a result of experiments, it was found that at a distance of 2 m from the output nozzle of the atomizer creates a gas-droplet stream cross-section in the shape of an ellipse with the largest cross-sectional dimension of 2.3 m and the smallest cross-sectional dimension of 0.5 m, the Dispersion of the sprayed droplets within an elliptical cross-section ranged from 100 to 130 microns.

Similarly implemented, the operation of the sprayer in the composition of the fire extinguisher. The liquid reservoir for fire fighting (water) is pre-filled with gas to the desired pressure storage (up to 3 MPa), and the capacity can be entered as an additive liquefied carbon dioxide or sulfur hexafluoride.

The inclusion of the fire extinguisher is carried out as follows. Pressing the lever 10 is the release of the locking element 9 from the saddle bone cavity 5 of the vessel 4 through the siphon tube 7 and a flexible conduit 11 into the cavity of the socket 12. Next, the liquid flows in coaxial channels 2, which are counter flows with the same speed, colliding in the area of the inlet nozzle (cone 3). In the result of a collision of counter-flow fluid to happen their dispersion at the edges of the holes and the formation of gas-droplet flow with elliptical cross-sectional shape. Such elongated cross-sectional shape of the flow allows you to spray the liquid on the fire big enough space for the sequential movement of the nozzle along the surface of the hearth. The ability to move the spray of fluid along the surface of the fire a large area is determined by the length of flexible tubing 11 and the total weight of the fire extinguisher.

The necessary duration and flow rate of the gas-droplet flow is governed by the governing lever 10 of the valve 8, built-in tank 4. To improve the efficiency of the displacement fluid can be used with volatile liquids, which are mainly used liquefied carbon dioxide (CO2) and sulfur hexafluoride (SF6). Such substances are introduced as additives in liquid fire (water). When the pressure in the vessel 4 during displacement of Jidkova cavity 6 is automatically maintained at the proper level and the flow of liquid through the sprayer is not lower than an acceptable level.

To exclude the interaction of gas turbocharger with displaced fluid, including chemical interaction and saturation of the liquid with a gas, a liquid cavity 5 is separated from the gas cavity 6 hermetic separation membrane made of an elastic material (not shown). This embodiment of the system liquid displacement though complicates the design of the fire extinguisher, but in this case, increasing the reliability of his work. In the simplest embodiment, when used as a liquid for fire-fighting water, and as the gas pressurization with an inert gas, the need for a separation membrane is absent.

To turn off the fire extinguisher is required to remove the control force from the lever 10 of the valve 8. The locking element 9 under the action of the compressed spring moves the valve seat and blocks its flow cross-section, thereby stopping the flow of liquid through the spray.

The effectiveness of the fire using the fire extinguisher, made according to the present invention, is provided by the possibility of generation of gas-droplet flow cross-section of elliptical shape with a uniform intensity and dispersion of the drops in the cross-section of the flow is avanyu with commonly used round shape of the flow area, to distribute the sprayed liquid on the surface of the fire, the area of which is considerably greater than the cross-sectional area of the gas-droplet stream. The solution of this problem allows to reduce the fluid flow, the stock of which is determined by the volume of the tank 4, to extinguish the fire.

As a result of experiments, it was found that the generation of gas-droplet flow with the elliptical shape of cross-section and of uniform intensity and dispersion is achieved by use of the nozzle of the atomizer in the form of a tapered cone, oriented across the inlet coaxial channels. The area of the inlet of the cone formed by the intersection of the inner surfaces of the channels forming the diffuser surface, shall not exceed the total cross-sectional area of the channels. These conditions determine the possibility of achieving the desired technical result.

The invention can be used in various fields of engineering where you want to create sprayed fluid flows in closed and in open space. The spray can be used in fire extinguishing systems, and technological equipment for the combustion of fuels is in agricultural land and industrial premises. A fire extinguisher with spray fluid made according to the present invention may find application as standard equipment for extinguishing fires at various sites: in the premises of hospitals, libraries, museums, boats, airplanes and other important objects.

1. The spray liquid, made in the form of a housing with two coaxial channels of the same cross-section, intended to counter the fluid, and a nozzle, the inlet of which is formed by the intersection of the inner surfaces of the channels forming the nozzle surface, wherein the nozzle has the shape of a tapered cone, oriented across channels, the area of the inlet of the diffuser does not exceed the total cross-sectional area of the channels.

2. Spray under item 1, characterized in that the angle between the symmetry axis of the channel and the axis of symmetry of the conical surface forming the diffuser ranges from 89 to 91o.

3. Spray on PP.1 and 2, characterized in that the channels are cylindrical in shape.

4. The dispenser according to any one of the preceding paragraphs, characterized in that the angle at the vertex of the cone, forming a cone, SOS the diffuser is formed of a tapered bore, made in the case.

6. A fire extinguisher containing the spray liquid, the liquid reservoir for fire fighting system liquid displacement, the pipeline connecting the liquid cavity of the container with the dispenser, and at least one faucet or valve for controlling the supply of fluid to the nozzle, wherein the spray liquid is made in the form of a housing with two coaxial channels of the same cross-section, intended to counter the fluid, and a nozzle, the inlet of which is formed by the intersection of the inner surfaces of the channels forming the nozzle surface, the nozzle has the shape of a tapered cone and oriented transversely of the channels, and the area of the inlet of the diffuser does not exceed the total cross-sectional area of the channels.

7. The fire extinguisher under item 6, characterized in that the angle between the axis of symmetry of the channels of the nozzle and the axis of symmetry of the conical surface forming the diffuser atomizer is from 89 to 91o.

8. The fire extinguisher under item 6 or 7, characterized in that the channels of the dispenser are cylindrical in shape.

9. The fire extinguisher according to any one of paragraphs.6 to 8, characterized in that the angle at the vertex can.6 - 9, characterized in that the diffuser atomizer is formed a tapered hole is made in the case.

11. The fire extinguisher according to any one of paragraphs.6 to 10, characterized in that the system liquid displacement contains the siphon tube installed in the cavity of the container.

12. The fire extinguisher according to any one of paragraphs.6 to 11, characterized in that as the liquid for fire fighting use water with a foaming agent.

13. The fire extinguisher according to any one of paragraphs.6 to 12, characterized in that the liquid fire contains a volatile liquid.

14. The fire extinguisher on p. 13, characterized in that the volatile liquid is used liquefied carbon dioxide - CO2and/or liquefied gas - SF6.

15. The fire extinguisher according to any one of paragraphs.6 to 12, characterized in that the system liquid displacement is equipped with elastic separation membrane separating the gas cavity capacity from its liquid cavity.

 

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