RU190859U1 - STANDARD-FLOORING AGENT FOR FIRE EXTINGUISHING - Google Patents

Abstract

The utility model relates to fire fighting equipment, in particular to stationary foam generators of medium multiplicity, used in fire extinguishing installations for tanks and other objects, and can be used, in particular, for fire extinguishing of tanks with oil and oil products. Stationary foam suppressor for fire extinguishing contains a hollow body in which an air inlet is made, closed with a protective net, a lid, a lid opening device, a foaming agent supply device and a foam-generating element. The body is cylindrical in shape and contains front and rear parts, each of which is made with a connecting flange. The foam generating element is fixed between the connecting flanges of the front and rear parts of the body and is made of perforated steel sheet in the form of three opposite opposing truncated cones one into another, fixedly interconnected and located one another in such a way that the base of the external truncated cone is fixed between the connecting flanges front and rear parts of the body, and the inner truncated cone with its upper part is directed towards the object of fire extinguishing. At the same time, the front part of the case and the cover are made of heat-resistant stainless steel. A foaming agent supply device is located at the end of the rear part of the housing and is made in the form of a collector with bends, on each of which a nozzle for spraying the foaming agent solution is fixed. The air inlet, covered with a protective grid, is made in the side surface of the rear part of the housing. The device for opening the lid is made in the form of a rod connected at one end to the collector, and the other end to the lid. The technical result is to increase the blast resistance of the foam generator when exposed to a blast wave or temperature exposure. 3 hp f-ly, 1 ill.

Description

The technical field to which the utility model

The utility model relates to fire fighting equipment, in particular to stationary foam generators of medium multiplicity used in fire extinguishing installations for tanks, buildings, structures, technological platforms and other objects, and can be used, in particular, for fire extinguishing tanks with oil and oil products.

The level of technology

The prior art generator of medium multiplicity foam stationary, which is made in the form of a cylindrical shell flanged. In the mounting flange there is an outlet for foam, closed by a lid mounted on a hinge. From the opposite side to the body through the flange joins the solution line of the stationary fire extinguishing system connected with a manual-driven sprayer. In front of the dispenser there is a damper, which is one of the shoulders of the two shoulders of the lever mounted in the housing on the hinge. The other end of this lever is connected by a hinge with a fork. Two shoulders lever rope connected to the handle of the manual drive. With its free end, the plug is mounted on the support fixed in the housing with a bolt. The traction is attached at its ends to the lid, which is attracted to the edge of the outlet hole by the force generated by rotating the nut along the threaded rod. The nut with its end surface rests on the fork. The position of the nut, which corresponds to the required force of sealing the joint of the cover and the edge of the outlet of the foam generator, is fixed on the stud with a lock nut. To the stud and the attached angle limiter opening the cover. The second end of the stopper is fixed with a bolt to the upper part of the body [RF patent 2404831 C1, publ. November 27, 2010].

The closest analogue of the claimed utility model is a medium-density foam generator stationary GPSS, intended for use in stationary installations of foam fire extinguishing tanks with oil and oil products. The known foam generator comprises a housing, with a foam former solution supply device arranged in the main part, made in the form of a sprayer, and a foam-generating element in the form of a cassette. In the lower part of the case there is an air intake opening, closed by a protective net. On the sides of the case is closed with covers. The sprayer forms a stream of foaming agent solution in the form of a torch falling on the surface of the cassette. The mesh surface of the cassette contributes to the formation of multiple bubbles of foam due to the injection of air through the intake opening in the lower part of the generator case. The foam created in this way is sent to the gas-air space of the fire extinguishing tank [http://www.aomz.ru/prod/descr/Description_GPSS.pdf, TU 112-025-85].

The disadvantages of the above devices is that they are not blast-resistant and when exposed to a blast wave or temperature effects, the design of the generators is easily deformed.

Disclosure of the essence of the utility model

The technical problem that the claimed utility model is aimed at is the creation of an effective explosion-proof stationary foam generator for fire fighting.

The technical result is to increase the blast resistance of the foam generator when exposed to a blast wave or temperature exposure.

The claimed technical result is achieved due to the fact that the stationary foam generator for fire extinguishing includes a hollow body in which an air intake opening is closed, covered with a protective net, a lid, a lid opening device, a foaming agent supply device and a foam generating element, the body being cylindrical in shape and containing the front and the rear parts, each of which is made with a connecting flange, the foam generating element is fixed between the front and rear connecting flanges parts of the body and is made of perforated steel sheet in the form of three opposite opposing truncated cones, one in the other, fixedly interconnected and arranged one in another in such a way that the base of the external truncated cone is fixed between the connecting flanges of the front and rear parts of the housing, and the internal one is truncated the cone with its upper part is directed toward the object of extinguishing, while the front part of the body and the cover are made of heat-resistant stainless steel.

The technical result is achieved by the fact that the foam generator case is made of two parts (front and rear), which allows you to make only a part (front) of the body of high strength material - heat-resistant stainless steel, without excessively weighting the foam generator design as a whole, allowing you to maintain the integrity and performance of the foam generator when exposed to an overpressure explosion of oil / petroleum product vapor inside the tank and / or the temperature effect of a flammable liquid fire, thereby increasing the explosion stationary foam generator for fire extinguishing.

Performing the front of the housing and the lid of heat-resistant stainless steel eliminates deformation and ensures the integrity of the foam generating element inside the foam generator when exposed to an overpressure explosion of oil / oil product vapor inside the tank and / or the temperature effect of a flammable liquid fire, which increases the blast resistance of the stationary fire extinguishing agent in whole

Performing the foam generating element in the form of three opposite opposing truncated cones from perforated steel sheet into one another gives the foam generating element rigidity in the direction of transverse reinforcement, which makes the foam generating element resistant to an explosive wave.

In addition, in the particular case of the implementation of the utility model, the device for supplying the foaming agent solution is located at the rear end and is designed as a collector with taps, each of which has a nozzle for spraying the foaming agent solution.

In addition, in the particular case of the implementation of the utility model, the air intake opening, covered with a protective grid, is made in the side surface of the rear part of the housing.

In addition, in the particular case of the implementation of the utility model, the device for opening the lid is made in the form of a rod connected at one end to the collector, and the other end to the lid.

Brief Description of the Drawings

Implementation of the proposed utility model is illustrated in the drawing, where:

in fig. 1 shows a general view of the foam generator in perspective,

where in the drawing position have the following notation:

1 - collector;

2 - tap;

3 - nozzle;

4 - the rear part of the body;

5 - the front of the case;

6 - cover;

7 - stock;

8 - foaming element;

9 - protective mesh.

Information confirming the possibility of the implementation of the utility model

The foam generator of FIG. 1 contains a hollow cylindrical body. At the end of the rear part 4 of the housing there is a foaming agent supply device, which is a collector 1, inside which channels (not shown in the drawing) are made to supply the foaming agent solution. The collector 1 is made with taps 2, each of which is fixed to the nozzle 3 for spraying the solution of the foaming agent. The housing consists of a front part 5, made with a connecting flange, a closed lid 6 and a rear part 4 with a connecting flange, by means of which the front part 5 and the rear part 4 are interconnected. In the side surface of the rear part 4 of the case an air intake opening is made, closed by a protective grid 9. Inside the case along its entire length in the center is placed the opening device of the cover 6, which is a rod 7 fixed in the collector 1 by connecting with the central of the outlets 2. In the front Part 5 of the housing is placed foaming element 8, mounted between the connecting flanges of the front 5 and rear 4 parts of the housing and made in the form of three, one inside the other, oppositely directed truncated cones. Truncated cones are fixedly interconnected, for example, using spot welding, at the points of connection of the upper end part of the outer truncated cone and base of the middle truncated cone and at the points of connection of the upper end part of the middle cone and base of the internal truncated cone. The truncated cones are located one in the other in such a way that the base of the external truncated cone is fixed between the connecting flanges of the front 5 and the rear 4 parts of the body, and the internal truncated cone with its upper part is directed towards the fire extinguishing object. The foam generating element 8 is made of a perforated steel sheet. The front part 5 of the housing and the cover 6 are made of heat-resistant stainless steel.

The operation of the device is as follows

In the event of a fire in the tank and the combined automatic fire extinguishing system is activated, the foaming agent (water) is fed to the inlet of collector 1. When filling channels (not shown) for feeding the foaming agent of collector 1, foaming agent solution, passing through the central of the outlets 2, creates pressure on the rod 7, which is connected to it and acts as a plunger. Under the action of the force, the rod 7 makes a translational motion, presses on the cover 6, thereby opening it. After filling the channels (not shown in the drawing) for supplying the foaming agent of the collector 1, the foaming agent solution, passing successively through the taps 2 and nozzles 3, is converted into spray jets that fall into the rear part 4 of the housing with an air intake hole closed by a protective grid 9 that performs the function primary mixing chamber, where, due to ejection, the sprayed jets of the foaming agent solution are saturated with air. The formed gas-air mixture enters the surface of the foam generating element 8 located in the front part 5 of the housing, and secondary ejection of air into the foaming agent solution occurs, and the frother solution is distributed over the surfaces of the foam generating element 8 and a film of the converter solution is formed from which then with the passage of air coming from the air intake, through the foam generating element, medium expansion foam is formed. Since the front part 5 of the body and the cover 6 are made of heat-resistant stainless steel, when exposed to an overpressure explosion of oil / oil product vapors inside the tank and / or temperature effects of a fire from a flammable liquid, the foam generating element inside the foam generator is ensured and its deformation is excluded. At the same time, the design of the foam generating element 8 in the form of three opposite opposing truncated cones made of a perforated steel sheet that enter one another allows the foam generating element 8 to be resistant to an explosive wave. Next, medium-multiplicity foam is filled with fixed-roof tanks at the rate of covering the entire product surface with foam, and at the floating-roof tanks at the rate of annular space between the wall of the tank and the metal diaphragm of the floating roof.

Tests of prototypes of foam generators have shown that the foam generators we offer successfully pass the tests for resistance to the effects of an explosion of an air-gas mixture with a temperature of more than 1000 ° C and a pressure exceeding 0.01 MPa. No deformation and damage.

The claimed technical solution meets the requirement of industrial applicability and may be implemented on standard technological equipment using modern technologies.

Claims (4)

1. Stationary foam extinguishing agent containing a hollow body in which an air intake opening is made, covered with a protective grid, a lid, a lid opening device, a foaming agent solution supply device and a foam generating element, characterized in that the body is cylindrical in shape and includes front and rear parts, each of which is made with a connecting flange, the foam generating element is fixed between the connecting flanges of the front and rear parts of the body and is made of perforated steel sheet in the form of three opposing directed truncated cones, one in the other, fixedly interconnected and arranged one in another in such a way that the base of the external truncated cone is fixed between the connecting flanges of the front and rear parts of the body, in the direction of the object of fire, while the front part of the body and cover are made of heat-resistant stainless steel. 2. Foamer according to claim 1, characterized in that the device for supplying the foaming agent solution is located at the end of the rear part of the body and is designed as a collector with taps, each of which has a nozzle for spraying the foaming agent solution. 3. The foam generator under item 1, characterized in that the air intake opening, closed by a protective grid, is made in the side surface of the rear part of the housing. 4. The foam generator under item 1, characterized in that the device for opening the cover is made in the form of a rod connected at one end to the collector, and the second end to the cover.

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