Foam generator

FIELD: fire safety; fire engineering.

SUBSTANCE: invention relates to the field of fire-fighting equipment and is designed for use in automatic systems of fire-fighting by generation of a high-expansion polydisperse foam under conditions of room smoke screening by blockage of quick-burning products with a high-expansion polydisperse foam. In the foam generator, each of the spray nozzles consists of a cylindrical hollow body with a fluid supply channel, threaded portion and garter belt section. In the lower part of the cylindrical hollow body with a channel for supplying liquid, a hollow conical swirler is fixed. Conical shell of the swirler is fixed by means of at least three spokes fixed at one end to the conical shell of the swirler in its upper part and the other end to the annular groove formed on the inner surface of the fluid supply channel. On the surface of the hollow cone swirler a screw thread is made.

EFFECT: technical effect: higher efficiency of spraying a fire-fighting liquid solution of a foaming agent (a high-expansion polydisperse foam).

1 cl, 2 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: swirl atomiser comprises the housing with auger, located inline in the housing bottom, and located in the top of the housing the choke with a cylindrical hole for fluid supply, connected with a diffuser, axisymmetric to housing and choke, the auger is pressed-in into the housing with formation of the conical camera located above the auger inline with the diffuser and connected with it in series, and the auger is made solid, and auger external surface is composed from connected in series two surfaces, one of which is at least single-thread helical groove with right or left thread and is located in the casing , and second surface is made smooth as solid of revolutions, axisymmetrically connected with spraying disk located perpendicularly to the casing axis, and protruding beyond the end face of the casing bottom part, at that both straight line and curved line of n-power can be used as line creating this surface. The surface of spraying disk protruding out of the end face of the casing bottom, is made deflected towards the casing bottom and has on the peripheral part the radial cutouts alternating with the solid part of the surface of the atomising disk. To the surface of the spraying disk protruding beyond the end face of the casing bottom the divider is secured made as rod vertical, axisymmetric to the atomiser casing, to its bottom part at least three inclined spokes are secured, at free ends of the spokes looking towards the spraying disk the impellers are installed with possibility of rotation around the spoke axis.

EFFECT: higher efficiency of liquid spraying.

2 dwg

FIELD: machine building.

SUBSTANCE: centrifugal atomiser with counter swirling flows contains a casing with vortex chambers and nozzle. The casing is made in form of the union with hole for liquid supply from main line and rigidly connected with it cylindrical coaxial sleeve with external thread. In the sleeve cone and cylindrical cavities are installed in series, they are coaxial with hole for liquid supply. Coaxially with casing in its bottom part a nozzle is connected, it is made in form of two-stage centrifugal cylindrical swirler connected with output cone chamber of the nozzle and separated from the hole for liquid supply by the perforate partition, secured at the end surface of the swirler casing. The partition looks towards the liquid supply, at that the first stage of the swirler is located in its top part, and contains cylindrical chamber with coaxially installed rod and secured on it helical plate. At that rod is secured in centre of the perforate partition. Second stage of the swirler is located coaxially with the first one and is made by ring cylindrical chamber connected is series with the cylindrical chamber of the swirler first stage, and has tangential inputs for liquid supply via the cylindrical ring cavity made by the casing of the swirler and cylindrical cavity of the sleeve. On the cone surface of the output cone chamber of the nozzle the screw thread is cut with direction of the flow swirling, opposite to direction of two-stage centrifugal cylindrical swirler.

EFFECT: increased efficiency of spraying due to increase of spray and to fine dispersion of sprayed liquid.

2 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building, maintenance and repair of machines and parts due to highly intensive cavitation saturation of a liquid jet. Technical result is achieved due to the fact that a high frequency atomiser comprising a casing with a mixing chamber, a nozzle communicated with the mixing chamber, flow swirling units, a swirler, spacers with axial spiral channels, is equipped by a dynamic cavitator at the output nozzle, the cavitator provides for the saturation of a jet coming out of the atomiser nozzle by cavitation masses. The dynamic cavitator is made as a resilient plate set perpendicular to the nozzle axis at the height of ≈0.3 nozzle diameter, the specified natural vibration frequency of the unit is equal to approximately 120 Hz. The total pressure at the atomiser nozzle output shall be not less than the cavitation threshold value.

EFFECT: invention provides for high quality cleaning of surfaces without cleaning agents being used.

1 dwg

FIELD: agriculture.

SUBSTANCE: sprinkler nozzle-activator comprises a housing and a deflector attached to the helical rack. The deflector is in the form of a bladed disc which blades are made on elliptic curves, the output edges of which are directed tangentially to the outer surface of the disc. The height of the blades corresponds to the required flow rate through the sprinkler nozzle-activator. In the interlobe space the spirals of left-hand orientation are fixed. Fixing the deflector to the housing is arranged by means of bolts, for this purpose on the deflector disc the protrusions are provided with the holes. The height of the protrusions is equal to the height of the blades, and the shape of the protrusions corresponds to the curved shape of the blades. In the central part of the blade disc a flow divider is fixed through the screws, made in the form of a surface of rotation of a parabola z2=px near the axis z.

EFFECT: improvement of the structure of rain, uniformity of its distribution on the irrigated field and increase in yield.

2 dwg

FIELD: agriculture.

SUBSTANCE: invention relates to method of irrigation using fine and drip sprinkling, and can be used in the mobile installations to ensure rain with drops size permitted for sprinkling of wide spectrum of crop. In the cascade-wave sprinkler the casing is made detachable, connected out of two halves by ribs using bolted joints. In internal cavity of the casing the deflector pole is installed by cone tip upwards. The deflector contains arc-shape fixtures to internal side of the casing of the wave blades connected with the casing by screws. The wave blades are made as segmental, and are secured on the casing wall by cascades. The blades are secured to the casing wall along the helical line with left hand direction. In bottom part of the casing the cone replaceable sprinkler with water catching aprons is secured using flanges. The water catching aprons are deflected from the wall of the cone replaceable sprinkler at some angle. The rear guide wall is made as per curve of the function y=arctgx, where y is coordinate of the curve point through vertical, x is coordinate of the curve point through horizontal. The water catching aprons are directed CCW by the input windows and are connected with water outlet holes. Face wall of the water outlet holes is made at angle towards wall of the cone replaceable sprinkler. Top edge of the water catching aprons has cut parallel to the wall of the replaceable cone sprinkler.

EFFECT: possibility of selection of the optimal rain parameters, increased operation reliability, simple design, increased crop-producing.

3 dwg

FIELD: machine building.

SUBSTANCE: proposed vortex injector comprises casing with auger pressed therein fluid and air feed elements. Said casing consists of two coaxial and coupled cylindrical sleeves: large diameter sleeves and small diameter sleeves, and inside the small diameter sleeve coaxially with it a auger is installed rigidly coupled with its internal surface, at that external surface of the auger is helical groove with right or left thread. Between the internal surface of the small diameter sleeve and external surface of the auger a helical external surface is created, it is connected by means of tube with the compressed air source, and inside the auger a hole is made with left or right thread connected with tube for liquid under pressure supply, at that direction of thread cutting in hole made inside the auger opposite to direction of the external helical groove of the auger, and in large diameter sleeve coaxially with it a shaped sleeve is located, its internal surface is created by cone and cylindrical surfaces, and it is rigidly secured in the large diameter sleeve via the sealing gasket creating the cylindrical chamber performing functions of the dampening tank for uniform compressed air supply to the helical external cavity, at that in the cylindrical cavity of the shaped sleeve a free end of the tube for liquid supply is provided, it is located in coaxial resilient ring served for dampening if the hydraulic impact in case of non-uniform liquid supply. In end part of the small diameter sleeve of the casing the diffuser is secured, at its end divider of the liquid flow is installed, it is made in form of the perforated ring coaxial with the diffuser.

EFFECT: higher efficiency of liquid spraying.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: proposed sprayer comprises casing with auger pressed therein and fluid feed union. Said casing consists of two aligned and coupled cylindrical sleeves: large diameter sleeves and small diameter sleeves. In the small diameter sleeve coaxially with it an auger is located, it is rigidly connected with its internal surface, at that the external surface of the auger is helical groove, and inside the auger at least two rows of through holes are made concentrically along circles. In each row at least three holes are made, and diameters of holes decrease from the auger axis to peripheral holes, and in the large diameter sleeve coaxially with it an union is installed, it is rigidly secured in it via the sealing gasket. In the union coaxially cylindrical hole is made, it transits in axisymmetric diffuser connected with the cylindrical chamber created by internal surface of the small diameter sleeve, and end face of the auger, and inside the auger coaxially and axisymmetrically with it a rod is secured, its one end is located flush with its end face looking on the union, and at the other free end of the rod at right angle to its axis at least two uniformly located along the rod length disks are installed, their diameters increase towards free end of the rod. On the free end of the rod the perforated sprayer is installed made in form of spherical segment, its concave part looks towards the disk last through the rod length, and to the peripheral part of the spherical segment the perforated cone shell is secured, the another part is rigidly connected with the end face of the cylindrical sleeve with small diameter of the injector casing.

EFFECT: higher efficiency of spraying.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: proposed sprayer comprises casing with auger pressed therein and fluid feed union. Said casing consists of two aligned and coupled cylindrical sleeves: large diameter sleeves and small diameter sleeves. In the small diameter sleeve coaxially with it an auger is located, it is rigidly connected with its internal surface, at that the external surface of the auger is helical groove, and inside the auger at least two rows of through holes are made concentrically along circles. In each row at least three holes are made, and diameters of holes decrease from the auger axis to peripheral holes, and in the large diameter sleeve coaxially with it a union is installed, it is rigidly secured in it via the sealing gasket, at that inside the union a cylindrical hole is made coaxially, passing to an axially symmetrically located diffuser, which is connected to a cylindrical chamber formed by the inner surface of the sleeve of smaller diameter, and the end surface of the auger; and inside the auger coaxially and axisymmetrically with it a rod is secured, its one end is located flush with its end face looking on the union, and at the other free end of the rod at right angle to its axis at least two uniformly located along the rod length disks are installed, their diameters increase towards free end of the rod. The disks uniformly installed along the rod length and having diameters increasing towards free end of the rod are made perforated.

EFFECT: higher efficiency of spraying.

3 cl, 1 dwg

Nozzle head // 2551289

FIELD: machine building.

SUBSTANCE: invention relates to devices to speed up a gas-dynamic (compressible) flow to supersonic velocities in different spheres of technical activities (sand blasters, vacuum cleaners, dust extractors, gas catchers, phase separators, oil cracking etc. equipment for chemical industry and household appliances). At least one nozzle in the nozzle head is made as a tapering part with critical section. The critical section enters the expanding part with a gap communicated with a cavity. The expanding part is set inside the nozzle head starting from the first to the last but one nozzle, in the form of an expanding shell. At the nozzle head outlet in the last nozzle the expanding part is made as an expanding shell or a concave or convex lip.

EFFECT: reduced power consumption in start-up and operation modes, provision for more stable operation mode, expanded range of application.

4 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: liquid flow spreader is fixed to the end face surface of a captive nut in an active spreader for a nozzle. The spreader is of pin type in the form of a truncated tetrahedron attached to the end face surface of the captive nut. The tetrahedron ribs are pins with blades with stops being mounted on them. Thus rotation of blades is provided due to the flows outgoing from a throttle plate with a nozzle jet. The tetrahedron base ribs are also connected to the blades with stops being mounted on them, by the pins.

EFFECT: higher efficiency of liquid atomising.

1 dwg

FIELD: fire safety.

SUBSTANCE: on telescopic hoist outside the tank a foam generator is fixedly installed and the hose is brought, which is connected to the supply pipeline and the tanks with the foaming agent and water. In the lower part the telescopic hoist mounted on the support is connected to the piston, which is in the cylinder. On the foundation the movement limiting device of the telescopic hoist is mounted. In the upper part of the links of the telescopic hoist there are seals and stoppers. To the cylinder with the piston and the telescopic hoist the air duct is brought for air supply, which is connected to the cylinders filled with compressed air. Outside the vertical steel tanks below the level of soil freezing two horizontal tanks of suitable capacity are mounted, one of which is filled with water and the other - with the foaming agent. The tanks are sealed and interconnected by the air-duct. At that the pipeline connecting the tank with the foaming agent with the supply pipeline has a metering device. The cylinder with compressed air is connected to the air duct and the tank for water and the foaming agent. The cylinder with compressed air is equipped with a pressure regulator and a crane-squib. In the upper part of the vertical steel tanks the sensors of pressure and temperature are mounted which are connected to the crane-squib and have an autonomous power supply system (e.g., batteries).

EFFECT: increase in reliability of fire fighting of oil products in vertical steel tanks with any type of roof without human involvement.

5 dwg

FIELD: fire safety.

SUBSTANCE: device for fire extinguishing has a centrifugal pump and fire hose fake. On the frame a standalone engine is installed, which is connected to the compressor with compressed air receiver. The compressor is connected through the choke with the air hose, which is made of fire-resistant material. At the end of the hose there is a small-sized container equipped with a siphon tube and an air nozzle. The nozzle is connected to the container through a pulse valve with manual control, which is intended to create repeated short explosive exhausts of compressed air with portions of dispersed fire extinguishing agent injected into them. The air hose is made with the ability to untwist it from the frame.

EFFECT: improvement of efficiency of fire extinguishing the objects located in arid areas.

FIELD: fire-fighting facilities.

SUBSTANCE: invention relates to the field of fire-fighting equipment and is intended for use in automatic fire extinguishing systems. In the foam generator of vortex type each of the spraying nozzles comprises a housing in which the screw is pressed, and the liquid supply fitting. The housing consists of two coaxal interconnected cylindrical sleeves: the sleeve of larger diameter and the sleeve of smaller diameter. Inside the sleeve a smaller diameter, coaxial to it, there is a screw which is rigidly connected to its inner surface. The outer surface of the screw is a spiral groove. Inside the screw there is one central through opening and at least two through openings concentrically located on the row circumferences. In each row there are at least three openings. The diameters of the openings decrease from the center opening to the peripheral. In the sleeve of larger diameter coaxially to it there is a fitting which is fixed in it through the sealing gasket. Inside the fitting a cylindrical opening is coaxially made, passing into the axially located diffuser. The diffuser is connected to the cylindrical chamber formed by the inner surface of the sleeve of a smaller diameter and an end surface of the screw. The screw is made of solid material.

EFFECT: increased efficiency of spraying of fire extinguishing liquid solution of the foam generator (high-expansion polydisperse foam).

2 dwg

FIELD: fire-prevention facilities.

SUBSTANCE: invention relates to means of cutting fluids, solutions. In the vortex foam generator, comprising a housing with the vortex chamber and a nozzle, the housing is made in the form of a fitting with a pipe for fluid supply and an air supply duct, and a cylindrical coaxial tube rigidly connected thereto, and coaxially to the housing, in its lower part, a nozzle 5 is connected which is made in the form of a first-stage centrifugal swirler in the form of a cylindrical cavity with at least three tangential inlets in the form of cylindrical openings, and over the first-stage centrifugal swirler a vortex conical chamber is mounted with a screw thread on its inner surface, which is the second stage of the fluid swirler, and the centrifugal swirler through the cavity, which is connected to the central orifice, is connected to the vortex conical chamber in its lower part, and in the upper part the conical chamber has at least three tangential inlets in the form of cylindrical openings tangentially located to its inner surface, and the supply of the working body to the tangential inlets is carried out by at least three cylindrical openings connected with tangential inlets at right angles, and which axes are parallel to the axis of the nozzle, and these openings are connected to the cylindrical chamber located above the cover of the conical chamber, perpendicular to its axis, and over the cylindrical chamber there is a cowling made in the form of a truncated cone with a central opening, connected simultaneously to the cylindrical chamber and the housing opening for supplying fluid from the main pipe, and between the lateral conical surface of the cowling and the inner conical surface of the housing in the place of its connection with the tube there is a gap in the form of a conical ring, and the centrifugal swirler is mounted in the housing to form a circular cylindrical chamber for supplying fluid to the tangential inlets of the centrifugal swirler, which cylindrical cavity is connected to the outlet conical chamber of the nozzle, and on the nozzle housing, coaxially to the conical chamber, a divider is fixed, made in the form of a cylindrical perforated shell with a perforated bottom mounted opposite the conical chamber, and on the nozzle housing, coaxial to the conical chamber, a divider is fixed, made in the form of a diffuser with a pack of perforated plates mounted in front of the conical chamber.

EFFECT: increased efficiency of fire fighting by increasing the spray cone and finely divided atomised fluid, as well as formation of high-expansion air filled foam.

1 dwg

FIELD: fire-prevention facilities.

SUBSTANCE: invention relates to fire-fighting equipment, namely, to structures of foam generators, and can be used in subsurface fire suppression systems in reservoirs with highly inflammable liquids (HIL). In the foam generator comprising a cylindrical housing with a nozzle for supplying water foamer solution, and a fitting for air supply, the housing is made in the form of a sleeve, inside of which and coaxially to it the fitting for air supply is located, and the inner surface of the sleeve and the outer surface of the fitting form an annular channel for supply the foamer solution, and the cylindrical tube with external thread is rigidly coaxially connected to the sleeve, while the nozzle through the tube with internal thread is connected coaxially to the housing, which is made in the form of a centrifugal flow swirler of the solution in the form of a dead-end cylindrical insert with at least three tangential inlets in the form of cylindrical holes, and the tube is a part of the nozzle and is mounted coaxially and in alignment with respect to centrifugal swirler, and in the end surface of the centrifugal swirler the series-connected axial conical and cylindrical orifices coaxial with each other and the housing are made, which are connected to the fitting to supply the foamer solution, and the centrifugal swirler is mounted in the cylindrical chamber of the housing to form an annular cylindrical chamber to supply the foamer solution to the tangential inlets of the centrifugal swirler and is connected with three chambers mounted sequentially and coaxially to it with conical, cylindrical diffuser outlet chamber, and the chambers are mounted so that the output of one chamber is the input for another, and in the coaxial diffuser output chamber the divider is fixed, which is made in the form of a cylindrical perforated shell with a perforated bottom set in front of the diffuser outlet chamber.

EFFECT: increased efficiency of foam generator that produces high-expansion foam.

1 dwg

FIELD: fire-prevention facilities.

SUBSTANCE: invention relates to fire-prevention equipment. The method is implemented by the vessel in which fire extinguishing agent is stored, and the vessel that holds the fire extinguishing agent is mounted with the brackets to the building structure of the premises and equipped with a device of gas phase release, combined with a measuring probe for the fire extinguishing agent and locking and starting system, such as of an electromagnetic type, which is connected by the pipeline to the tube for injection of the fire extinguishing agent in the foam generator which contains a sprayer, an inducing nozzle and a dissector of two-phase flow, and the sprayer is connected to the housing of the inducing nozzle, made in the form of a diffuser mounted axially-symmetrically with respect to the sprayer, on the housing of the inducing nozzle, in the part located closer to the sprayer there are at least three windows for ejecting air, and at the output the dissector of two-phase flow is fixed, which is made in the form of a circle of mesh or perforated material, and the sprayer housing is composed of two coaxial, interconnected cylindrical sleeves: a sleeve of a larger diameter and a sleeve of a smaller diameter, and inside the sleeve of a smaller diameter coaxially to it a screw is located.

EFFECT: increased efficiency of fire-fighting through the use of high capacity fog foam.

1 dwg

FIELD: construction.

SUBSTANCE: in a reservoir for storage of liquid goods, for instance, oil products, comprising a wall, a bottom, a roof and foam generators, the reservoir roof is arranged with application of fire-fighting boards, every of which includes a foam generator, an inspection manhole with a cover, besides, each board has a lining area with weakened welded seams providing for roof opening in case of extremely high pressure inside the reservoir. At the same time manhole covers may be combined by a power traction rod with control arranged outside the borders of the reservoir bank. Besides, foam generators are equipped with nozzles directed relative to the product mirror at different angles at height and along the reservoir circumference providing for overlapping foam jets above the surface of the stored product.

EFFECT: increased used volume of a reservoir, prevention of reservoir damage and foam spraying along the entire surface of a stored product.

4 dwg

FIELD: fire-fighting means.

SUBSTANCE: invention is intended for use in automatic fire suppression systems. Foamgenerator of ejection type comprises a body, a distributing and guiding device. The housing consists of inlet pipe with a hole at one end and a plug on the other. The flange is attached perpendicular to the pipeline from the side of the hole, to which by at least three spokes a cylindrical shell is attached, connected by at least three spokes with a perforated disk, rigidly connected to the plug. On the pipeline at least three holes are placed perpendicular to the axis, and connected with it additional pipelines, each of which consists of two parts. Lengths of additional pipelines are increasing from the free end of the pipeline input to the end with a plug, and the axes of the additional pipelines are rotated relative to each other at an angle of 120°. On each of them, in order of length increasing from the peripheral plugged part of the pipeline to the axis of the main hole the offsets of varying length with the injectors at the ends are fixed, in front of which the perforated discs are located, fixed to the inlet pipe. The diameters of disks increase from the previous to the subsequent with additional pipelines. The nozzles are made from the shell, inside which there are two axisymmetric throttling holes: cylindrical and conical.

EFFECT: increased efficiency of spraying fire-extinguishing liquid foaming agent solution (high-expansion polydisperse foam).

2 dwg

Foam generator // 2455080

FIELD: process engineering.

SUBSTANCE: invention relates to firefighting equipment. Foam generator comprises casing, distributing and guiding devices. Said casing represents cylindrical shell with annular stiffness ribs mounted on two horizontal support plates with fastening holes. Foam solution distributor is secured to said casing by means of, at least, three spokes arranged along generating lines of truncated-cone surface axially symmetric about cylindrical shell. Larger base of said surface represents casing shell base while smaller base represents foam solution distributor of toroidal surface connected with inlet pipeline with flange and plug on opposite ends. Inlet pipeline divides said toroidal surface into two symmetric parts. Additional pipeline, plugged at both ends, is arranged perpendicular to inlet pipeline and aligned with horizontal axis of said toroidal surface. Diameters of inner cavities of toroidal surface and both pipelines are equal, said cavities being communicated. Branch pipes are jointed to said inner cavities on the side of cylindrical shell. Guiding device consists of inner and outer generating screens made up of aligned truncated-cone surfaces. Note here that inner generating screen is provided with second stiff round ring jointed with first stiff ring by, at least, three spokes. Every spray nozzle consists of case housing two axially symmetric restricting orifices. cylindrical and conic.

EFFECT: higher efficiency.

2 dwg

Foam generator // 2448750

FIELD: fire fighting.

SUBSTANCE: foam generator has a sprayer connected to the casing of the ejecting nozzle, made in the form of a diffuser set axisymmetrically with respect to the sprayer. A mesh divider of two-phase flow is installed on a section of the diffuser. The sprayer consists of an throttling washer with an annular rib facing the nozzle with a flange perpendicular to the axis of the throttling washer and the hole axle made in the nozzle, and the flange is rigidly connected to the annular rib to form a cylindrical expansion chamber, and in the throttling washer there is one central through hole, and at least two rows of through holes concentrically arranged in circles, in each row at least three holes are made, and the values of the diameters of the holes decrease from the center hole to the peripheral. On the casing of the ejecting nozzle made in the form of a diffuser, in the part located close to the sprayer, at least three windows for ejection of air are made, and at the outlet of the diffuser a mesh divider of two-phase flow is fixed, made in the form of two series-connected networks, one of which has a shape of a circle, and the other has a shape of a hemisphere.

EFFECT: increased efficiency of spraying of fire-extinguishing liquid solution of foaming agent (high-expansion polydisperse foam).

1 dwg

FIELD: fire-fighting, particularly foam delivery equipment.

SUBSTANCE: device has cylindrical body, mixing chamber, inlet pipe to supply aqueous foam-generating solution into body, nozzle for aqueous foam-generating solution feeding to mixing chamber, gas supply pipe and conical diffuser located at mixing chamber outlet. Gas supply pipe is installed inside cylindrical body so that inlet gas supply pipe end flush with body end and may define annular nozzle between gas supply pipe and mixing chamber to feed aqueous foam-generating solution into mixing chamber.

EFFECT: increased gas saturation rate and increased efficiency of aqueous foam-generating solution mixing with gas in mixing chamber due to gas introduction in core of turbulent foam-generating solution flow.

4 cl, 2 dwg

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