CN2296218Y - Foam generator capable of automatically regulating nozzle position - Google Patents

Abstract

The utility model relates to a foam generator capable of automatically regulating nozzle position, which comprises an automatic regulator, a cylinder body of the automatic regulator, a composite piston inside a cylinder body, and pressure springs. A hollow piston rod of the composite piston is connected with a guide pipe connected with a nozzle, and an inner hole of a large piston of the composite piston matches with the guide pipe which extends into the cylinder body; the inner hole is guided by the guide pipe. When the pressure of water changes, a generator can automatically adjust the position of a nozzle to cause the nozzle to be in the proper position. The gas release of the whole foam generator can be fixed and unchanged for improving the fire-fighting efficiency. The utility model is suitable for the aid of fire disaster such as limited space, warehouses, gas stationa, etc.

Description

Automatically regulate the foam maker of nozzle location

The utility model relates to a kind of preceding foam maker of directly making fire foam that uses.

Foam maker is the key equipment of froth fire extinguishing system.Known foam maker is made up of prime mover, proportioner, nozzle and foam screen etc.During work, water and foam solution mix in desired ratio, enter generator with certain pressure, evenly spray to foam screen by nozzle with atomised form, on the inner surface of net, form one deck foam mixing liquid film, the air-flow that sucks when air-flow of being sent here by fan or nozzle ejection is blown into a large amount of bubbles with the mixed liquor film---the foam aggregation.This foam aggregation is remedied category-A or category-B fire quickly and effectively with total flooding or local topped mode, also can control liquefied petroleum gas, liquefied natural gas trickling fire effectively.Its blow-off velocity is fast, cost is low, reliable operation, easy to operate, and it is applicable to, and the confined space is underground as: oil depot, warehouse, hangar, garage, oil jetty, thermo oil boiler room, boats and ships, library, liquefied gas station, mine tunnel and other, the rescue of the large tracts of land fire of semi-underground building etc.

The gas release of foam maker has important relationship in the position of its relative foam screen during with nozzle operation.The nozzle location of present known foam maker all is changeless, during fire fighting, because the pressure at water source can not remain constant, when the pressure oscillation at water source, the pressure of the foam mixing liquid that goes out from nozzle ejection also can increase or reduce, and its atomizing back spray angle and distance of foam screen relatively also changes thereupon, owing to can not be in best eject position, reduce gas release, influenced blow-off velocity.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of foam maker that can regulate nozzle location according to the variation of source pressure automatically is provided.

The purpose of this utility model realizes in the following manner:

The foam maker that the utility model is regulated nozzle location automatically comprises prime mover, proportioner, nozzle, foam screen, in described foam maker, automatic regulator is housed, described automatic regulator is made up of cylinder body, the built-up piston and the compression spring between built-up piston and cylinder cap that are installed in the cylinder body, the hollow piston bar of described built-up piston is connected with the conduit that links to each other with nozzle, and the endoporus of the big piston of described built-up piston matches merging by its guiding with the guide pipe that stretches in the cylinder body.

The utility model is regulated the foam maker of nozzle location automatically, owing to installed automatic regulator therein, thereby when source pressure changes the pressure variation that causes foam mixing liquid, can regulate the position of the relative foam screen of nozzle automatically, make nozzle remain at best atomized spray position, thereby the gas release that guarantees whole foam maker immobilizes, and has improved fire-fighting efficiency.

Other details of the utility model foam maker and characteristics can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings, wherein:

Fig. 1 is the fundamental diagram of embodiment one high-expansion foam generator of the utility model foam maker of regulating nozzle location automatically;

Fig. 2 is the structure principle chart of the automatic regulator of the utility model foam maker of regulating nozzle location automatically.

With reference to Fig. 1.Fig. 1 is an embodiment of the present utility model, regulates the fundamental diagram of the high-expansion foam generator of nozzle location automatically.The shell of 1 expression foam maker among the figure is equipped with the fan 3, nozzle 4 and the self-priming proportioner 5 that are driven by the hydraulic turbine 2 in shell 1.Foam screen 6 is installed in the front of shell 1.Automatic regulator 8 also is housed in shell 1.The hollow piston bar 12 of the built-up piston 10 of automatic regulator 8 and nozzle 4 link into an integrated entity (referring to Fig. 2).

With reference to Fig. 2.Fig. 2 is the structure principle chart of the utility model automatic regulator.In the cylinder body 9 of automatic regulator 8 built-up piston 10 is housed, built-up piston 10 is made up of big piston 11 and hollow piston bar 12, and the outer end that hollow piston bar 12 stretches out cylinder cap 13 is connected with the conduit 14 that links to each other with nozzle 4.The cylindrical of big piston 11 matches with cylinder body 9, and its endoporus matches merging by its guiding with the guide pipe 15 that stretches in the cylinder body 9, feeds the foam mixing liquids from the proportioner 5 and the hydraulic turbine 2 in the guide pipe 15.Between big piston 11 and cylinder cap 13, compression spring 16 is housed.On the guide pipe 15 that is positioned at cylinder body 9, have fluid through-hole 17, be used for foam mixing liquid is introduced in the cavity 18 between cylinder body 9 and the big piston 11, be processed with fluid through-hole 19 in the upper and lower both sides of outer circle wall, the left side of cylinder body 9, link together with flexible hose 20 respectively between upper and lower fluid through-hole 19 and the conduit 14.Relation between the elastic force of the pressure of regulating the foam mixing liquid that big piston 11 left ends are born and spring 16 makes nozzle 4 be in best eject position at the staking-out work state, can install additional between cylinder cap 13 and spring 16 and regulate the pad (not shown).

During work, press water major part from pressure water source enters the hydraulic turbine 2, drive the hydraulic turbine 2 rotations, and the rotation that drags fan 3 outwards blows out air-flow, another fraction water enters self-priming proportioner 5, and lean on negative pressure that the foam solutions in the foam liquid tank 7 are sucked, carry out elementary mixing, then with after the water that flows out from the hydraulic turbine 2 outlet is undertaken grade mixing end by 3% mixed proportion, enter automatic regulator 5 through guide pipe 15, foam mixing liquid divides two-way to enter conduit 14 subsequently, evenly sprays to foam screen 6 from nozzle 4 with atomised form again, thereby forms one deck mixed liquor film on the inner surface of foam screen 6.Wherein one the tunnel is trunk roads, enters conduit 14 through hollow piston bar 12; Another road is a branch road, and 17 flow into cavitys 18 from the hole, divide again two-way from the upper and lower hole 19 of cylinder body 9 sidewalls through flexible pipe 20 inflow catheters 14.The air-flow of being sent here by fan 3 is blown into a large amount of bubbles with the mixed liquor film on the foam screen 6 and delivers to the scene of a fire, reaches the purpose of fire extinguishing.

When source pressure reduces, nearer from the atomizing foam solution that nozzle 4 is sprayed onto on the foam screen 6 than demarcating jet length, broken away from best eject position, reduced gas release, at this moment the pressure that enters the foam mixing liquid in automatic regulator cylinder body 9 cavitys 18 also decreases, the power on big piston 11 left surfaces of acting on is less than the bounce of spring 16, so built-up piston 10 is subjected to the effect of spring force to move forward Δ S distance, drive conduit 14 simultaneously nozzle 4 is shifted near foam screen 6 forward, make nozzle 4 be back to best eject position, return to the demarcation gas release of design; Otherwise, when source pressure raises, far away from the atomizing foam solution that nozzle 4 is sprayed onto on the foam screen 6 than demarcating jet length, broken away from best eject position equally, also reduced gas release, at this moment the pressure that enters the foam mixing liquid in automatic regulator cylinder body 9 cavitys 18 raises, act on pressure on big piston 11 left sides greater than the bounce of spring 16, so the mobile backward Δ S of built-up piston distance, drive conduit 14 simultaneously nozzle 4 is moved backward,, make nozzle 4 be back to best eject position away from foam screen 6, return to the gas release of demarcation, guarantee that fire-fighting efficiency does not reduce.

High multiple foam device after hours, air can oppositely enter conduit 14 from top nozzle 4, enter the cavity 18 of cylinder body 9 through top hose 20, foam mixing liquid in the cavity 18 is through bottom hose 20, conduit 14 is outside nozzle 4 flows to down, to guarantee not deposit foam mixing liquid in the cylinder body 9, prevent the cylinder body corrosion, prolong its service life.

The automatic regulator of the high-expansion foam generator of the automatic adjusting nozzle location of present embodiment also can be used for medium expansion foam generator and low expansion foam generator.

Claims (4)

1, a kind of foam maker of automatic adjusting nozzle location, comprise prime mover, proportioner, nozzle, foam screen, it is characterized in that in described foam maker, automatic regulator being housed, described automatic regulator is made up of cylinder body, the built-up piston and the compression spring between built-up piston and cylinder cap that are installed in the cylinder body, the hollow piston bar of described built-up piston is connected with the conduit that links to each other with nozzle, and the big piston endoporus of described built-up piston matches merging by its guiding with the guide pipe that stretches in the cylinder body.

2, according to the foam maker of the described automatic adjusting nozzle location of claim 1, the foam maker that it is characterized in that described automatic adjusting nozzle location is a high-expansion foam generator, described prime mover is the hydraulic turbine, described high-expansion foam generator also includes fan, the described hydraulic turbine and described fan are installed in the shell of described high-expansion foam generator, and described fan is driven by the described hydraulic turbine.

3,, it is characterized in that the upper and lower both sides of outer circle wall, described cylinder body left side are provided with fluid through-hole, link together with flexible pipe respectively between described fluid through-hole and the described conduit according to the foam maker of claim 1 or 2 described automatic adjusting nozzle locations.

4,, it is characterized in that being equipped with between described spring and the cylinder cap adjusting pad according to the foam maker of the described automatic adjusting nozzle location of claim 3.

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