CN100496643C - Closed type middle and low pressure water mist sprayer with single spraying nozzle - Google Patents
Closed type middle and low pressure water mist sprayer with single spraying nozzle Download PDFInfo
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- CN100496643C CN100496643C CNB2005100815501A CN200510081550A CN100496643C CN 100496643 C CN100496643 C CN 100496643C CN B2005100815501 A CNB2005100815501 A CN B2005100815501A CN 200510081550 A CN200510081550 A CN 200510081550A CN 100496643 C CN100496643 C CN 100496643C
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Abstract
The invention discloses a closed type middle and low pressure water mist sprayer with single spraying nozzle, which is provided with a blow head equipped with a blow head seat hole, an intake port and an outlet port, an atomization core is arranged in the blow head seat hole, its inlet opening faces the blow head seat inlet port, the atomization core is provided with a water flow channel in communication the blowing port, a blow head frame in fixed connection with the blow head seat, a sealing disd plugged at the exhaust port of the blow head seat, the sealing disk leaves the blow head seat when there is eruption from the blow head, a temperature-sensing support member is arranged between the sealing disk and the blow head frame and is supported by the blow head frame, the blow head is in closed state. When the initialized temperature is reached, the temperature-sensing support member is damaged, then the blow head is turned into open type spraying state.
Description
Technical field
The present invention relates to the fine mist spray head that can open the eruption fire extinguishing automatically that a kind of fire-fighting is used, especially relate to a class single injector enclosed mesolow fine mist spray head.
Background technology
Shower nozzle is the key component of self-extinguishing equipment terminal, and it is installed in the protection scene and is used for sprinkling fire, is determining the working method and the fire extinguishing effect of fire-fighting system.The shower nozzle that is widely used in automatic sprinkler system has two big classes: a class is the sprinkler tip of enclosed.Another kind of is the water smoke or the fine mist spray head of open type.
Sprinkler tip belongs to the low pressure automatic sprinkler, and it is plugged spout at ordinary times, and the temperature-sensitive assembly of temperature-sensitive comes off and opens spout when catching fire, and emits the water impact splash box, to around fire extinguishing water.Application number is that a kind of sharp formula mist automatic sprinkler that dabbles that ejects has been announced in the application for a patent for invention of CN200410041981.0, its structure and existing sprinkler tip are basic identical, just increased and eject sharp device, this can prevent to be deposited on the splash box when sealing column from falling, and can improve the effect that dabbles.But its flow of way and the degree of atomization that only depend on single hole water impact splash box or spatter mist awl condition each other, and the atomizing effect difficulty is good, and it also belongs to follow-on sprinkler tip or watering spray painting head in essence.The advantage of sealed sprinkler head is that each shower nozzle can be located temperature according to the place and erupts from main control, and shortcoming is that water is many, water droplet big, water pollutes big, the oil that is not suitable for going out, gas, electric information fire.
The water spray shower nozzle is the mesolow deluge system, and it can spray the big water smoke that big grain drips, and its flow is big, degree of atomization is poor, and water consumption and water mark pollute also very serious.The spout of water spray shower nozzle is often opened, as long as turn on pump is driven main valve, all the water spray shower nozzles in the whole fire-fighting district will erupt simultaneously, so relatively suit it is installed in the centralized space, protection is the high fire fire-fighting object of water funk pollution not.AS and water spray shower nozzle all can only use in the topical application system, and they only are fit to that water directly is sprayed onto the flame surface just can work, and can not do the catch fire total flooding sprinkling fire of target of misalignment.
Fine mist spray head generally is the mesohigh deluge system, and it is to be in development at present, has the primary clustering of the fine water mist fire-extinguishing system of excellent environmental-protecting performance.The injection flow rate of fine mist spray head only is part to tens/one of sprinkler tip consumption, can clean and put out A, B, C and electric information fire fast.Water mist system can be used for the total flooding fire extinguishing, also can be used for local fire extinguishing, is to substitute the new technology of breathing out dragon and gradually substituting conventional fire-sprinkling system.
The patent application of fine mist spray head in recent years is more, and for example application number is CN02258972.4, and the patent application of CN03244446.x and CN03277532.6 has provided 3 kinds of deluge systems that go out the atomizing of stream bump by aperture pressure.Application number is that the shower nozzle that the patent application of CN03278717.0 is showed also is a kind of fine mist spray head, and it obtains thin water smoke by the twin-stage eddy current atomization, but they all are deluge systems.
More above-mentioned two big class shower nozzles their characteristics as can be seen are very inequality, and especially sprinkler tip is just in time fully opposite with the pluses and minuses of fine mist spray head.Advantage as sprinkler tip is intelligent (enclosed), operating on low voltage (water pump is easy to get, security is good, is suitable for civilian): shortcoming is that injection flow rate is big, atomizing is poor, efficient is low, can only be used for local fire extinguishing.And that the advantage of fine mist spray head is a water is few, atomize, and also can be used for the total flooding fire extinguishing: shortcoming right and wrong intelligent (open type), need in work under the high hydraulic pressure (high-pressure water is rare, and security is suitable for specific use not as low pressure).If can get both length, remove both weak points, work out the advantage of the new collection of a class two class shower nozzles, and do not have their new type nozzle of shortcoming best.Analyzing this shower nozzle according to reason should be: intelligent (enclosed), water be few, atomize, and also must adapt to the mesolow water source of normal domestic.
In fact the shower nozzle that many large-scale automatic sprinkler systems public or skyscraper all need have this function especially.Fire pump station is concentrated a place in this type of building, pipeline and shower nozzle then disperse to be installed on each room of every layer, can't use water smoke or fine mist spray head in this case because which room they do not possess and catch fire, the shower nozzle in which room erupts with regard to temperature-sensitive, and the shower nozzle in the room, other places is still closed the enclosed self-starting function that does not spray.If be valuable and water funk article such as archive files, instrument and meter, computer installation in each room, the fire-fighting in this place also should not be used sprinkler tip, because its injection flow rate is big, the water pollution loss that its fire extinguishing water causes even is not second to fire.If it is also not all right to use the extinction using gas of water pollution-frees such as IG541 or FM200 instead, they are not only expensive, mesohigh is civilian feels unwell entirely, main shortcoming is the deluge system that also can only use neat spray to stop together, if using this gas extinguishing system can only be all eruption fire extinguishings simultaneously of all rooms of catching fire of a room, this is obviously not all right.Also there be not at present a kind of fire prevention and shower nozzle that is well suited for above-mentioned special requirement in fact.
Summary of the invention
The objective of the invention is to not have the problem of available enclosed low pressure fine mist spray head at existing automatic sprinkler system, a kind of temperature-sensing element control opener that has is provided, and can just can spray the new-type fire extinguishing sprayer of dense thin water smoke with a small amount of mesolow water, i.e. single injector enclosed mesolow fine mist spray head.
The present invention is provided with nozzle boss, and nozzle boss is provided with nozzle boss hole, nozzle boss import and outlet;
The atomizing core, the atomizing core is located in the nozzle boss hole, and the inlet opening of atomizing core is facing to the import of nozzle boss, and the atomizing in-core is provided with water stream channel, and water stream channel connects the nozzle boss outlet with atomizing core spout connection, atomizing core spout;
The shower nozzle framework, shower nozzle framework and nozzle boss are affixed:
Seal disc, seal disc are plugged in the nozzle boss outlet at ordinary times, and seal disc comes off from the nozzle boss outlet during shower nozzle eruption;
The temperature-sensitive support member, form by reaching temperature-sensing element and the support member that design temperature destroys immediately, the temperature-sensitive support member is located between seal disc and the shower nozzle framework and by the shower nozzle frame supported, the fluid [as fire water (wet type) or the body of calming the anger (dry type)] that is used for shutoff nozzle boss hole and atomizing in-core, making atomizing core inlet outlet pressure differential is zero, fluid is static not to leak, make shower nozzle be in enclosed, and when temperature-sensitive support member heat damage, seal disc loses the support of temperature-sensitive support member and the outlet of opening nozzle boss, atomizing core inlet outlet pressure differential increases suddenly, and fluid high-speed produces fire-fighting water smoke by the atomizing core or the air water mist sprays from shower nozzle, makes shower nozzle be in open type.
The shower nozzle framework is provided with and tightens part, is used to regulate the compress tightness of temperature-sensitive support member to seal disc and nozzle boss outlet, tightens part and can select for use and tighten screw etc.
Seal, seal are installed on the seal disc or the nozzle boss outlet, are used for the sealing between seal disc and the nozzle boss outlet.
The temperature-sensitive support member can be selected temperature-sensitive glass envelope or meltable golden support etc. for use.
Can be provided with filter in the nozzle boss hole between the import of nozzle boss and atomizing core, or all steep device and current equalizer, all steeping device is provided with and all steeps the device cover, all steep device cover outlet or inlet is equiped with orifice plate or net: current equalizer is a kind of multichannel barrier current equalizer or for many vanes stator current equalizer or be many paddles rotor current equalizer, current equalizer or be contained in all steeps in the device cover, or current equalizer with all steep device and be connected in series.
The temperature-sensitive support member bottom center of vertical shower nozzle framework can be provided with the shower nozzle axis normal spatter the mist dish, be used for the thick equal refinement of spraying of big flow of ejection and enlarge spray angle; The said mist dish that spatters can be circular fixed thin dish or toothed on every side fixed thin dish, preferably have equally distributed hole or radial finedraw on every side on circular fixed thin dish or the toothed fixed thin dish: saidly spatter the fan-shaped rolling discs that the mist dish can also be 4～8 uniform blade compositions at inclination angle such as band, during spraying, the rotation centrifugal force of fan-shaped rolling disc can strengthen and spatters fog effect.
Can be provided with the side direction support plate and the rectangle parallel with shower nozzle that link to each other spatters the mist plate at side formula shower nozzle frame facet, be used to stop and the horizontal shower nozzle of sputter to the useless spraying of ceiling direction.
When being provided with narrow meshed atomizing core in the nozzle boss, the place need be provided with screen pack or filter in the nozzle boss inlet opening.
The atomizing core is a profile band external screw thread circle short column body, inner chamber is the atomizing core in hollow cylindrical chamber, be provided with 3～6 centrosymmetric tangential through holes in cylinder chamber circumferential wall or top, or tangential slot, or push up oblique through hole, said tangential through hole or tangential slot or push up the outer side bus of oblique through hole and cylinder chamber wall inner periphery is similar to tangently, there is the contraction conical nozzle in atomizing in-core chamber.It is big also can be evenly distributed with 4～8 inlet diameters around the above-mentioned atomizing core contraction shape spout, the ladder inclined hole that nozzle diameter is little, form cap jet, the circle convergence awl (oppositely taper) that these ladder inclined hole axle center surround becomes the secondary collision dispersive nozzle with diffusing cone (forward taper) skewed crossing of spout.
The atomizing core is the externally threaded short cylindrical of profile band, inner chamber is the atomizing core in hollow cylindrical chamber, the tip circle face of its outer wall and side circumferential wall are provided with 3～12 small through hole of evenly arranging, their axis or in pairs vertical hand over mutually or in disk perpendicular to atomizing core cavity axis, be the radial mutual friendship in center, or become with the core cavity axis greater than 35 ° of angles are uniform tiltedly to meet at mutually on the axis a bit, thereby form multiple head-on collision discharge orifice.
The atomizing core is that up-small and down-big ladder cylinder connects an obconic atomizing core, on the cylindrical cavity arm on atomizing core top, be arranged with the chamber in approximate at least two the tangent eddy flow through holes of circle, 3～6 eddy flow through holes preferably, the eddy flow through hole form the plane of eddy flow ring near below, cylinder chamber begins to be shrunk to the back taper spray orifice; Uniform many equidistant trapezoidal eddy flow grooves on the conical outer wall of back taper spray orifice, eddy flow groove male cone (strobilus masculinus) are close on the identical shaped nozzle boss outlet hole wall; The nozzle boss hole communicates through whirl hole, eddy flow chamber and atomizing core spout with the annular chamber internal channel that forms between the core outside cylinder that atomizes, and the annular chamber outer tunnel communicates with the nozzle boss outlet through the eddy flow groove; Atomizing core spout is located in the center cone of nozzle boss outlet.
The atomizing core is made up of close multiple-grooved swirl plate or the single groove swirl plate that fits over the flow sheet in the nozzle boss hole and press under it, the interior circular hole of swirl plate over against and be pressed on the same diametral plane of nozzle boss turbination outlet opening, form atomizing core spout: the flow sheet is provided with cannelure with the face that swirl plate pastes mutually, the cannelure internal diameter is worked energetically and is equaled swirl plate annular chamber circular diameter, the cannelure external diameter is bordering on the diameter of a circle that each castellated of swirl plate becomes, flow sheet annular bottom land evenly is distributed with the through hole that a plurality of diameters equal groove width, and through hole is preferably established at least 6.
The atomizing core is for dividing swirl vane, dividing swirl vane to tell two half elliptic blades that respectively account for half of reversed dip by upright flat flat both sides constitutes, the axis projection of atomizing core is a cylindrical that equates with nozzle boss hole internal diameter, divide the swirl vane close fit to be contained in the nozzle boss hole, two semiellipse swirl vanes of handing over into 90 °～120 ° mutually export towards the nozzle boss that band shrinks the diffusion taper hole.
The atomizing core is a swirling flow atomizing core in the twin-stage, be provided with two-stage back taper cover, the contraction awl muzzle of superposed first order taper sheath is in the taper sheath shrinkage hole of the second level, first order back taper jacket wall is provided with at least two, be preferably 3～4 tangential through holes or tangential groove, second level back taper jacket wall is provided with at least two, be preferably 2～3 tangential grooves, two-stage back taper cover integral body is enclosed within the nozzle boss hole, radially upper nozzle seat outlet opening and two-stage back taper cover outlet opening forms concentric ring, axial last first, secondary tapered sleeve aperture or concordant substantially is perhaps in the one-level tapered sleeve mouth retraction secondary tapered sleeve chamber.
The atomizing core is hollow cone spiral atomizing core, hollow cone spiral atomizing core is provided with the cone of a conical cavity, on cone wall, be provided with a rectangular coil groove, this hollow cone spiral atomizing core is contained in both deads in line in the nozzle boss hole, and the big end external diameter of hollow cone spiral atomizing core and nozzle boss inlet hole be close joins and fixedly connected.The aperture at the awl tip of hollow cone spiral atomizing core forms internal and external double-circular shape nozzle jointly near the nozzle boss export center and with the nozzle boss outlet.
The atomizing core is that eddy flow hits stream twin-stage atomizing core mutually, eddy flow hits stream twin-stage atomizing core mutually and is provided with the atomizing stem stem, be provided with the small cylindrical of docking in atomizing stem stem lower central and hit the chamber mutually with the conical nozzle of nozzle boss outlet, be arranged with at least two around the chamber of hitting mutually, be preferably 3～4 the horizontal cyclone hole of shrinking the aperture is arranged, each whirl hole center line can meet at and hit the center, chamber mutually, the one less vertical core of diameter that vertically communicates is with it arranged at middle part, each horizontal cyclone hole, the cylindrical of vertical core and whirl hole side bus are tangent, the inlet of each vertical core is positioned at atomizing stem stem top and towards the nozzle boss import, the vertical core axis parallels with the atomizing wire mandrel, being packed in the nozzle boss hole close joining of external cylindrical surface of atomizing core, the cylindrical chamber of hitting mutually of atomizing core goes out the spout of interruption-forming atomizing core.
The invention solves two difficult problems in the prior art.The firstth, fire extinguishing sprayer is efficient mistization and powerful ejection under mesolow, (theory and practice shows that all high-pressure atomization is easy, and the low pressure atomizing is difficult, and big density is flowed in the low pressure long drive, and to spray thin water smoke more difficult).The secondth, adopt suitable temperature-sensing element to form temperature-sensitive support member rational in infrastructure, make it when catching fire, can control the atomising device eruption, and being closed, shower nozzle forms enclosed low pressure fine mist spray head.
The way that solves first difficult problem is: the futuramic brute force atomizing core that can both generate the thin water smoke of fire extinguishing under mesolow to different inlet flows.The structure of powerful atomizing core is that the special water stream channel in the core body is led in the atomizing core inlet opening that links to each other with the nozzle boss import, constitutes atomization chamber, and the spout of atomization chamber connects nozzle boss and exports.For adapting to the needs of different situations, atomizing core of the present invention is except that utilizing atomizing functions such as pressure, eddy flow, bump, and the also special effervescent atomization function of introducing is for example when using heterogeneous air-water two phase flow, in system, take the special measure, also be provided with on the shower nozzle and all steep the device structure.By comprehensive atomizing structures such as multiply percussion flow vortex flow, twin-stage eddy flow, awl spiral percussion flow and eddy flow percussion flows, carry out to be subjected to the brute force of temperature-sensing element control to atomize to single current or air-water two phase flow.When shower nozzle was done side formula level and installed, the shower nozzle frame facet was established and is spattered mist plate (stop and reflection to the baffle plate of the useless spraying of ceiling direction): when the atomizing core of the thick mist of adapted spray, be provided with on the shower nozzle framework and spatter the mist dish; When adapted sprays the atomizing core of mist, can not establish and spatter the mist dish, the single hole enclosed fine mist spray head that constitutes the single hole enclosed fine mist spray head that spatters the mist dish so respectively and do not spatter the mist dish.With the benefit of spattering the mist dish is to reduce the spraying concentration of shower nozzle below small-angle scope (there is the high density fog-zone center during solid-cone spraying), strengthen the spraying concentration of auger angular region, it can make also that centrifugal atomizing often occurs in the high density fog-zone of spray cone angle a outer shroud to diffusion (the high density endless belt more much higher than averag density often arranged between 9/10a～7/10 α) outside the spray cone angle α, thereby spraying is more evenly distributed, makes spray cone angle and spraying area bigger.In addition, by spattering mist dish the spilling mist and spattering the mist dish and stop that secondary impact can take place the oblique spraying outside the awl of horizontal movement of dishing out, this can further enlarge the spray cone angle scope, and makes the further refinement of spraying.In order to promote the strong point of spattering the mist dish, can be divided into 4～8 five equilibrium covering of the fans spattering the mist dish, each covering of the fan all inclines into identical inclination angle to same direction, forms fan blade shape rotary type and spatters the mist dish, and its axle sleeve sky is enclosed within the framework screw and puts outward, or is enclosed within on the framework screw.When shower nozzle is opened, the spraying impingement flow makes flabellum shape spatter the mist dish and rotates, the fast rotational of spattering the mist dish makes the water droplet that is sprayed on the dish increase centrifugal force, can improve its to around the speed and the length of splatter water smoke, the bump dynamics that increases the oblique spraying of spout and laterally spatter mist, thereby the increasing atomizing angle improves atomization quality.
The way that solves second difficult problem is that a suitable atomizing core is contained in the nozzle boss hole, the inlet opening of atomizing core communicates with the nozzle boss import through filter or screen pack, the spout of atomizing core is positioned at the outlet of nozzle boss, their common nozzles of forming shower nozzle, the outlet of nozzle boss is by the seal disc and the seal shutoff of temperature-sensitive support member (as the support of temperature-sensitive glass envelope or band fusible alloy) top braces, the bottom of temperature-sensitive support member is supported on the shower nozzle framework with adjustment screw, this moment, shower nozzle was in no current, the enclosed state of also not spraying.When the temperature-sensing element heat damage, seal disc and seal lose support and open the shower nozzle outlet, and pressure flow is atomized into thin water smoke through atomizing core brute force and sprays from spout.Owing to temperature-sensing element is to damage by the fixed temperature of setting to open shower nozzle, when therefore using the fire extinguishing system chance fire of shower nozzle of the present invention, near the scene of a fire shower nozzle will carry out water jet fire-extinguishing by opening shower nozzle successively from the distance at fire combustion center, do not spray and still close, thereby realized the self-starting enclosed function of fine mist spray head away from the shower nozzle of ignition point.
The present invention is a kind of enclosed mesolow fine mist spray head, can inflate at ordinary times and do the dry sprinkler use, but also water-filling is done the use of wet type shower nozzle.The fire-fighting medium of shower nozzle input can be a pure water, can be the fire water liquid that contains additive, also can be mist flow or bubble stream that air water mixes, especially at low-pressure area, if want to spray the thin water smoke of big momentum, preferably import the dispergated air water stream of two-phase (as mist flow, bubble stream etc.).For saving air demand, can make the bubble stream and the shower nozzle effervescent atomization technology of water bag gas (water is continuous phase, and gas is decentralized photo).With traditional by flow stream pressure, centrifugal, the collision atomizing is different, effervescent atomization is a kind of novel interior lively power atomizing, its mechanism is: have a mind to be pressed into the many minute bubbles in the mixed flow, under the loss in head effect in the pipeline course of conveying, its surrounding fluid static pressure is gradually little, minute bubbles are the fragmentation of expansion limit while advancing, flow to the nozzle place, the periphery pressure jump is 0, Compressed Gas instantaneous expansion in the minute bubbles that cladded by moisture film, fried one's water breaks film, when exploding a large amount of thin water smokes also with the expanding gas preshoot, thereby strengthen the momentum of thin water smoke from the nozzle ejection.The benefit of effervescent atomizer is that nozzle bore is difficult for greatly stopping up, and effervescent atomization makes the big spray orifice of low pressure can spray the also thin high momentum water smoke that sprays than the little spray orifice of high pressure, and its Suo Daer average diameter SMD can reach below 100 μ.Another benefit is that its atomizing flow is big, and especially valuable is that its spraying momentum is big, and it is faster than the thin water smoke speed of high pressure aperture ejection, and jet length is long, and the penetration power that enters flame is big, thereby fire-fighting efficiency is higher.But the two phase flow of bubble stream class is changeful, is difficult to control, and very easily segregation and also poly-taking measures, also need be installed the special device that all steeps the device class additional on the shower nozzle of use in system.Enclosed mesolow fine mist spray head of the present invention can spray ultra-fine air water mist when input media is gas bag water (gas is continuous phase, and water is decentralized photo), be suitable for the fire-fighting object that water funk mark pollutes is done the total flooding fire extinguishing.
The thin water smoke of shower nozzle ejection of the present invention is meant that the cumulative volume percentage of shower nozzle institute's atomized water spray under operating pressure is Dv0.99≤1000 μ m.
Air water mist flow pressure 3.45～1.21Mpa that the mesolow of the thin water smoke of the said mesolow of the present invention is meant the hydraulic pressure of nozzle boss porch or is input to inlet is middle pressure, less than 1.21Mpa is low pressure, if only use the single fluid atomizing, then shower nozzle hydraulic pressure preferably is not less than 0.6Mpa.The maximum working pressure of shower nozzle of the present invention is mainly determined with the safe load that can keep the automatic sprinkler positiver sealing by the safe bearing capacity of temperature-sensitive glass envelope.
Characteristics of the present invention: not only propose new atomizing theory, provide some novel atomising devices, main is that atomising mechanism that adhered to two class shower nozzles originally separately and enclosed self-starting mechanism are combined, form a class unique good function is arranged, be suitable for the thin water smoke or the gas fine mist spray head of multiple medium and types of applications system, be fit to very much multiple specific (special) requirements of modern fire-fighting and Performance-based Fire Protection Design and use.
Compare with existing close technical scheme, the present invention has the following advantages:
Degree of atomization than existing sprinkler tip and waterfog head is all much better, even a large amount of thin its water consumptions of water smoke of ejection and water mark pollute also less.Shower nozzle of the present invention has the multiple advantage of sprinkler tip and the not available fine mist fire-fighting of waterfog head, as can be used for doing the total flooding fire extinguishing: also can be used for the fire-fighting of water funk mark polluted place, have the environmental protection characteristic.
Compare the automatic sprinkler function that it has not available temperature-sensitive self-starting function of general fine mist spray head and sealing at ordinary times not to erupt with existing fine mist spray head.It is compared with most of high pressure fine mist spray heads, can spray the required thin water smoke of fire extinguishing under lower pressure of supply water.
Compare with the high pressure enclosed fine mist spray head of external existing exploitation, its advantage is: the present invention does not adopt the single structure that only depends on the atomizing of aperture high pressure, the present invention has used the big spout atomization technique of not susceptible to plugging low pressure, and adopt the comprehensive atomizing core show unique characteristics, composition can satisfy several enclosed low pressure fine mist spray heads of different needs, they both can satisfy the specific (special) requirements of some fire-fighting object to fine mist fire-fighting, also can conveniently be used in the multiple civilian fire-fighting system that has common fire water supply, and needn't be in the face of the difficult problem of the civilian fire-fighting restriction of the difficult summation of the required high-pressure hydraulic pump of heavy pressure fine spray shower nozzle use high pressure.Temperature control closed type structure of the present invention is the improvement of the closed type structure of traditional sprinkler tip, sprinkler tip be can conveniently continue to use and ripe temperature-sensitive glass envelope or fusible alloy assembly and member thereof used, and needn't develop new temperature-sensitive supporting member, thereby the cost that its exploitation is made is lower, safe and reliable.
Description of drawings:
Fig. 1 is the enclosed fine mist spray head structural representation of band swirling flow atomizing core.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is a tangential slot swirling flow atomizing cored structure schematic diagram.
Fig. 4 is the B-B profile of Fig. 3.
Fig. 5 is a top inclined hole swirling flow atomizing cored structure schematic diagram.
Fig. 6 is the vertical view of Fig. 5.
Fig. 7 is the C-C profile of Fig. 6.
Fig. 8 hits the enclosed fine mist spray head structural representation of stream atomizing core mutually for band.
Fig. 9 is for vertically hitting hole atomizing cored structure schematic diagram mutually.
Figure 10 is the E-E profile of Fig. 9.
Figure 11 hits hole atomizing cored structure schematic diagram mutually for the center.
Figure 12 is the K-K profile of Figure 11.
Figure 13 hits hole atomizing cored structure schematic diagram mutually for oblique.
Figure 14 is the T-T-T-T profile of Figure 13.
Figure 15 is the enclosed fine mist spray head structural representation of the inside and outside eddy flow twin-stage atomizing of band core.
Figure 16 is the A-A profile of Figure 15.
Figure 17 is the enclosed fine mist spray head structural representation of band vortex flow atomizing core.
Figure 18 is the B-B profile of Figure 17.
Figure 19 is A-A (the multiple-grooved vortex flow sheet) profile of Figure 17.
Figure 20 is A-A (the single groove vortex flow sheet) profile of Figure 17.
Figure 21 divides swirl vane atomizing core for band and spatters the structural representation of the enclosed fine mist spray head of mist dish.
Figure 22 is atomize top view (G to) figure of core of Figure 21.
Figure 23 spatters the thin water smoke side of the enclosed formula nozzle structure schematic diagram of mist plate for swirling flow atomizing core and rectangle in the band twin-stage.
Figure 24 is the A-A cutaway view of Figure 23.
Figure 25 is that the B of Figure 23 is to view.
Figure 26 spatters the enclosed fine mist spray head structural representation of mist dish for band hollow cone spiral atomizing core and rotary type.
Figure 27 is the F-F cutaway view of Figure 26.
Figure 28 is that the K of Figure 26 is to view.
Figure 29 hits the enclosed fine mist spray head structural representation of stream twin-stage atomizing core mutually for the band eddy flow.
Figure 30 is the K-K profile of Figure 29.
The piece number title of mark representative in the drawings is as follows:
1. nozzle boss 2. nozzle boss holes 3. nozzle bosses export 4. seals
5. seal disc 6. temperature-sensitive glass envelopes 7. fusible alloy supports 8 fixed mist dishes that spatter
9. frame arm and tighten screw 10. filters or screen pack 11. rotary types spatter the mist dish
12. gland 13. water conservancy diversion plug screws 14. all steep device 15. multichannel barrier current equalizers
16. orifice plate or net 17. all steep device and overlap 18 water conservancy diversion glands paddle more than 19 rotor current equalizer
20 water conservancy diversion gripper shoes vane more than 21 stator current equalizer, 22 lateral spray types spatter the mist plate
Atomizing core numbering:
011. tangential hole swirling flow atomizing core 012. tangential slot swirling flow atomizing core
013. top inclined hole swirling flow atomizing core 021. vertically hits hole atomizing core mutually
022. the center is hit hole atomizing core 023. oblique mutually and is hit hole atomizing core mutually
03. inside and outside eddy flow twin-stage atomizing core 04. vortex flow atomizing core
05. divide eddy flow mist core in swirl vane atomizing core 06. twin-stage
07. hollow cone spiral atomizing core 08. eddy flow hits stream twin-stage atomizing core mutually
The specific embodiment
Embodiment 1: the enclosed fine mist spray head of band swirling flow atomizing core, and referring to Fig. 1-7.The import fixed filter of the nozzle boss 1 of this example or screen pack 10, install in the nozzle boss hole 2 and (or be threaded, or the close location of joining) boss cylindricality atomizing core, boss cylindricality atomizing core is selected from tangential hole swirling flow atomizing core 011 or tangential slot swirling flow atomizing core 012 or top inclined hole swirling flow atomizing core 013, the diameter of atomizing core spout 01X5 is 2～5mm, can also establish 4～8 uniform ladder inclined holes as paying spray 0116 or 0126 around the atomizing core spout, they all are positioned at the disk of nozzle boss outlet 3, nozzle boss outlet 3 is not leaked by 5 shutoff of seal disc of band sealing ring 4, the seal disc central lower, withstood by temperature-sensitive glass envelope 6, be supported on the tightening on the screw 9 of shower nozzle framework at the bottom of the glass envelope; Atomizing core chamber is to have the cylindrical cavity on top to receive the conical cavity that contracts, shrink conical cavity and constitute atomizing core spout 01X5, on the perisporium of the cylinder chamber 0110 of diameter 6～20mm and 0120, be provided with 3～6 centrosymmetric tangential holes 0112 or tangential slot 0122, on the top cover 0131 of cylinder chamber 0130, be provided with 3～6 centrosymmetric top inclined holes 0132, each bore dia or groove width are the high 2～5mm of 1.5～3mm groove, and these feed the hole of cylinder chamber, the periphery and approximate tangent (0112,0122, the 0132 common name 01X2 of cylinder chamber circumference of groove; 0110,0120,0130 common name 01X0, promptly 01X2 outer bus and the inner periphery of chamber 01X0 in the plane is tangent); When temperature-sensitive glass envelope in the fire reaches design temperature and destroys, seal disc is because of losing support, coming off and open the nozzle boss outlet, pressure flow enters atomizing core chamber from the nozzle boss import through the tangential hole or the groove of atomizing core, and advance along inner periphery chamber, chamber rotation, can change faster and faster the hollow thin water film of formation to shrinking the awl place, helical form is gone out the atomizing core at a high speed, in the moment that breaks away from the spout constraint, centrifugal force and inertia force make the liquid film UNSTABLE FAILURE become silk to drip that a shape moves on and with air sharp impacts, friction, generate a large amount of thin water smokes thereby further be broken into many little water droplets.
Embodiment 2: band hits the thin sprinkler head of enclosed of stream atomizing core mutually, referring to Fig. 8-14.The present embodiment shower nozzle is except that the atomizing core is different with the atomizing cored structure of embodiment 1, and all the other and embodiment 1 same section are no longer described.
The atomizing core that is contained in the nozzle boss hole becomes the step cylindricality, the big end of its band opening is towards nozzle boss outlet 3, the great circle cylinder of atomizing outer core 02X1 and nozzle boss hole are fixed and are not leaked close joining, small column that top is with holes or taper seat then and between the nozzle boss hole form the gap, the water aperture that in the gap flows into atomization chamber 02X0, respectively clashes, hole diameter is at 1～3mm, nozzle boss outlet is at ordinary times blocked anhydrous flowing by the seal disc of band sealing ring, when nozzle boss exit seal dish came off, the nozzle boss outlet communicated with atmosphere, and it is 0 that outlet is pressed, under the effect of import hydraulic pressure, each aperture is sprayed water in atomization chamber, and bump is pulverized mist formation mutually, sprays thin water smoke by spout.
The atomizing core hole of present embodiment has following three types can choose any one kind of them:
Vertically hit hole atomizing core 021 mutually, 3～6 mutually perpendicular through holes 0212 that even distributed quantity is identical with diameter on the circumference on the tip circle plane of its cylindricality outer wall and on the side circumferential wall and 0213.
Two kinds of atomizing cores 022 and 023 that head-on collision hole, 3～7 centers is arranged, the former through hole 0222 be evenly distributed on perpendicular to the atomizing wire mandrel circumferential plane in, its top planar central also can be established the through hole 0223 of a same size, the latter's through hole 0232 then is evenly distributed on the conical surface, and their axis becomes greater than 45 with the atomizing wire mandrel.The isogonism at angle intersects on the atomizing wire mandrel a bit, other mark 1,2,4,5 in Fig. 8, and 6,9,10 is identical with Fig. 1.
Embodiment 3: the enclosed fine mist spray head of the inside and outside eddy flow twin-stage atomizing of band core, and referring to Figure 15,16.The shower nozzle of present embodiment and embodiment 1 have 2 differences, and all the other same sections are no longer described.
First difference is that this nozzle boss outlet opening 3 is turbination, and matches close joining with the outer conical surface of atomizing core lower part helical groove 034;
Second difference is that this shower nozzle atomizing core has inside and outside eddy flow twin-stage nebulization channel structure, atomizing core 03 top is the open tubular column by the water conservancy diversion plug screw 13 shutoff top mouth of screen pack 10 belows, the bottom of atomizing core is that big footpath is bordering on the nozzle boss bore dia, the male cone (strobilus masculinus) gradient is shunk the same hollow inverted cone of the conical surface with the nozzle boss outlet, be evenly equipped with on the hollow cylinder perisporium at atomizing core middle part with the chamber in approximate 3～8 the tangent eddy flow through holes 032 of circle, nearby cylindrical cavity begins to be shrunk to back taper spout 035 below the whirl hole plane.
Embodiment 4: the enclosed fine mist spray head of band vortex flow atomizing core, and referring to Figure 17-20.Except that atomizing core difference, the nozzle structure of present embodiment and embodiment 3 identical no longer descriptions.The detailed structure of atomizing core 04 is: and close flow sheet 043 of joining, multiple-grooved swirl plate 041 or single groove swirl plate 042 identical with the nozzle boss aperture are pressed on nozzle boss and export on 3 the inverted cone platform rank external diameter with water conservancy diversion gland 12, the interior circular diameter of swirl plate equates with the inlet circular diameter of nozzle boss outlet inverted cone, obconic nozzle boss export mixes atomizing core spout, the flow sheet is provided with cannelure with the face that swirl plate pastes mutually, the uniform a plurality of through holes in the back side, the diameter of through hole is identical with the width of cannelure.In Figure 17, other mark 1,2,4-6,9,10 is identical with Fig. 1, and water conservancy diversion gland 12 is located at the below of filter 10.
Embodiment 5: band divides swirl vane atomizing core and spatters the enclosed fine mist spray head of mist dish.Referring to Figure 21,22, the nozzle structure of present embodiment and embodiment 3 identical parts are no longer described, except that atomizing core difference, present embodiment is provided with at the shower nozzle framework and spatters mist dish 8, spattering the mist dish is the fixing thin disk that has the uniform radial finedraw of symmetry on it, spatters the mist dish and is used for the equal refinement of the thick spraying of big flow and enlarges spreading of spray.
The atomizing core of present embodiment is a whole swirl vane structure 05 of dividing, it is one upright flat flat 051, its both sides are told and are respectively accounted for half of two half elliptic blades 052 of reversed dip mutually, the axis projection of the half elliptic blade of two opposition is circles that equate with nozzle boss hole internal diameter, divide that swirl vane is close to be fitted in the nozzle boss hole, two semiellipse blades that are crossed as 90 °～120 ° mutually form atomizing core spray orifice towards the nozzle boss outlet that band shrinks diffusion hole.In Figure 21, other mark 1-6,9 is identical with Fig. 1.
Embodiment 6: swirling flow atomizing core 06 and the enclosed fine mist spray head that spatters mist dish 8 in the band twin-stage, and referring to Figure 23～25.The import dress screen pack 10 of the nozzle boss 1 of present embodiment, water conservancy diversion plug screw 13 is housed thereafter, between screen pack and water conservancy diversion plug screw cavity, establish the fixed vane stator current equalizer of forming by at least 3 dihedral vanes 21, water conservancy diversion plug screw bottom surface all is provided with cylindrical boss up and down, the periphery of water conservancy diversion plug screw bottom surface is provided with at least two holes or groove, the outer circle wall of the item cavities of water conservancy diversion plug screw is provided with screw thread, the tip circle hole that the cylindrical boss of below, water conservancy diversion plug screw bottom surface compressed and sealed first order handstand tapered sleeve, 3～4 tangential holes 062 are arranged on the sidewall of first order handstand tapered sleeve, first order handstand tapered sleeve shrinks awl and exports 066 and is positioned on the center line in handstand tapered sleeve chamber, the second level, the sidewall of second level handstand tapered sleeve has 2～3 tangential slotted eyes 063, water conservancy diversion plug screw and two-stage tapered sleeve are linked to be integral body, are tightly packed in the nozzle boss hole 2 large circle location in two ends up and down by it; Second level tapered sleeve outlet 065 is positioned at nozzle boss and exports 3 central authorities, nozzle boss outlet 3, the outlet 065 of second level tapered sleeve and first order tapered sleeve outlet 066 three diametrically form concentric ring, two-stage tapered sleeve aperture or probably concordant in the axial direction, perhaps first order tapered sleeve exports in the tapered sleeve chamber, the 066 retraction second level.The transverse plane of outlet 3 is by seal disc 5 shutoff with sealing ring 4, and seal disc 5 is compressed by temperature-sensitive glass envelope 6, is supported on the shower nozzle framework at the bottom of the temperature-sensitive glass envelope and tightens on the screw 9.Present embodiment is the abutment wall installed of level with side formula shower nozzle, for stop and sputter to the useless spraying of ceiling direction, be provided with the rectangle parallel in shower nozzle outlet side the place ahead and spatter mist plate 22 with shower nozzle, spatter the mist plate and link to each other with the side direction support plate that is fixed on shower nozzle framework end.
Embodiment 7: band hollow cone spiral atomizing core and the enclosed fine mist spray head that spatters the mist dish, and referring to Figure 26-28.Be equipped with at nozzle boss inlet and all steep device, be used for bubble population or air pocket that the air-water two phase flow to the input shower nozzle gathers and carry out refinement and homogenizing.All steep device 14 by all bubble cover 17, multichannel barrier current equalizer 15 be close to all bubbles pore plate or the net 16 that barrier is central dip shape and form.Spill all steeps the pore plate or net protrudes in the big stomidium 071 of hollow cone spiral atomizing core 07.Establish rectangular coil groove 072 having on the tapered sleeve wall of conical cavity, form hollow cone spiral atomizing core, its big end external thread rotary is in the nozzle boss import of all steeping the device rear end, and the tiny cone opening of atomizing core is positioned at nozzle boss outlet central authorities, forms with one heart two annular spouts; The seal disc of band seal 4 (sealing gasket) holds out against also shutoff on the plane of nozzle boss outlet by the fusible alloy support.Be located at the shower nozzle tank bracket and tighten the fan-shaped that screw puts and spatter mist dish 11, when having 4～8 fans at identical shaped and inclination angle, establish radiation straight joint or hole on the blade, spattering the mist dish during shower nozzle spraying can quick rotation.In Figure 26, other mark 1-3,5,9 is identical with Fig. 1.
Embodiment 8: the band eddy flow hits the enclosed fine mist spray head of stream twin-stage atomizing core mutually, referring to Figure 29,30.Enter the mouth with the water conservancy diversion gland 18 that is threaded at nozzle boss, the water conservancy diversion gland is pressed against on the atomizing stem stem 080 all steeping device cover 17, all steep all bubbles device 14 and current equalizer 19 that many paddles rotor current equalizer 19, water conservancy diversion gripper shoe 20 and orifice plate or net 16 compositions are housed in the device cover successively, be used for the air pocket or the bubble population of the air water mixed flow of refinement and homogenize input shower nozzle.The atomizing core 08 of present embodiment is the twin-stage atomizing core that atomizes through bump again through swirling flow atomizing earlier, its structure is the cylindrical chamber 084 of hitting mutually that is positioned at atomizing stem stem 080 lower central, connect atomizing core conical nozzle 085 downwards, the level rotary flow hole 082 that is communicated with 3～4 band shrinkage cavity mouths towards periphery, the uniform center of hitting chamber cross-section mutually that intersects at of each whirl hole axis, the whirl hole of each level has a less vertical core 081 of diameter to intersect vertically with it, the cylindrical of whirl hole side bus and vertical core is tangent, the axis in each vertical hole all parallels with the nozzle boss center line, and vertically the inlet in hole is distributed on the plane, top of cylindrical atomizing core.Being packed in the nozzle boss hole close joining of outside cylinder of atomizing core, atomizing core conical nozzle abuts against in the nozzle boss outlet 3,5 shutoff of seal disc and sealing that the nozzle boss outlet is held out against by temperature-sensitive glass envelope 6, the temperature-sensitive glass envelope is supported on the shower nozzle framework 9.In Figure 29, other mark 1,4,10 is identical with Fig. 1.
Claims (3)
1, single injector enclosed mesolow fine mist spray head is characterized in that being provided with
Nozzle boss is provided with nozzle boss hole, nozzle boss import and outlet in the nozzle boss;
The atomizing core, the atomizing core is located in the nozzle boss hole, and the inlet opening of atomizing core is facing to the import of nozzle boss, and the atomizing in-core is provided with water stream channel, and water stream channel connects the nozzle boss outlet with atomizing core spout connection, atomizing core spout;
The shower nozzle framework, shower nozzle framework and nozzle boss are affixed;
Seal disc, seal disc are plugged in the nozzle boss outlet, and seal disc leaves from the nozzle boss outlet during shower nozzle eruption;
Temperature-sensitive support member, temperature-sensitive support member are located between seal disc and the shower nozzle framework and by the shower nozzle frame supported, and shower nozzle is in enclosed; When reaching the damage of design temperature temperature-sensitive support member, shower nozzle is in the open type atomize;
Described atomizing core
Be provided with the cylinder chamber that band shrinks conical nozzle, be provided with 3～6 uniform tangential through holes in cylinder chamber circumferential wall or roof, or tangential slot, or push up oblique through hole, tangential through hole, or tangential slot, or push up that bus and cylindricality lumen pore internal diameter are bordering on tangent outside the projection of oblique through hole on the cylinder chamber cross section; Or
On the tip circle face of the outer wall in atomizing core chamber and side circumferential wall, be provided with 3～12 through holes of evenly arranging, the axis of through hole or vertical in pairs friendship mutually, or in disk, be the radial mutual friendship in center perpendicular to atomizing core cavity axis, or becomes with atomizing core cavity axis greater than 35 ° of angles tiltedly to meet at mutually on this axis a bit, form the discharge orifice that clashes; Or
On the cylindrical cavity arm of atomizing core, be arranged with the chamber in approximate at least 2 the tangent eddy flow through holes of circle, the eddy flow through hole form the plane of eddy flow ring near below, cylinder chamber begins to be shrunk to the conical cavity of band spout; Uniform many equidistant trapezoidal eddy flow grooves on the conical outer wall of conical cavity, eddy flow groove male cone (strobilus masculinus) are close on the identical shaped nozzle boss outlet cone-shaped wall; The nozzle boss hole communicates through whirl hole, eddy flow chamber and atomizing core spout with the annular chamber internal channel that forms between the core outside cylinder that atomizes, and the annular chamber outer tunnel communicates with the nozzle boss outlet through the eddy flow groove; Atomizing core spout is located in the center cone of nozzle boss outlet; Or
Be made up of close multiple-grooved swirl plate or the single groove swirl plate that fits over the flow sheet in the nozzle boss hole and press under it, it is identical and continuous that the interior circular hole and the nozzle boss of swirl plate exports initial inverted cone bore dia, forms atomizing core nozzle; The flow sheet is provided with cannelure with the face that swirl plate pastes mutually, the cannelure internal diameter is more than or equal to swirl plate annular chamber circular diameter, the diameter of a circle that each castellated of cannelure external diameter and swirl plate becomes is identical, and flow sheet annular bottom land evenly is distributed with the through hole that at least 6 diameters are bordering on groove width; Or
Be a minute swirl vane, dividing swirl vane is upright flat flat, two half elliptic blades that respectively account for half of reversed dip are told in upright flat flat both sides, the axis projection of atomizing core is a cylindrical that equates with nozzle boss hole internal diameter, divide the swirl vane close fit to be contained in the nozzle boss hole, two semiellipse blades that are crossed as 90 °～120 ° mutually export towards the nozzle boss that band shrinks the diffusion taper hole; Or
Be swirling flow atomizing core in the twin-stage, be provided with two-stage back taper cover, superposed first order taper sheath is enclosed within the second level taper mantle cavity, first order back taper jacket wall is provided with at least 2 tangential through holes or tangential groove, second level back taper jacket wall is provided with at least 2 tangential grooves, two-stage back taper cover integral body is enclosed within the nozzle boss hole, and nozzle boss exports the outlet of overlapping with the two-stage back taper, and the three is concentric diametrically; Two-stage tapered sleeve outlet or approaching concordant in the axial direction is perhaps in the first order tapered sleeve outlet tapered sleeve chamber, the retraction second level; Or
Be hollow cone spiral atomizing core, hollow cone spiral atomizing core is provided with the cone of band conical cavity, on cone wall, be provided with a rectangular coil groove, the big end external diameter of hollow cone spiral atomizing core and nozzle boss inlet hole be close joins and fixedlys connected, the most advanced and sophisticated aperture of awl of hollow cone spiral atomizing core is positioned at the nozzle boss export center, and goes out interruption-forming internal and external double-circular shape nozzle with nozzle boss; Or
For eddy flow hits stream twin-stage atomizing core mutually, eddy flow hits stream twin-stage atomizing core mutually and is provided with the atomizing stem stem, be provided with the cylindrical chamber of hitting mutually of docking in atomizing stem stem lower central with the nozzle boss conical outlet, be laid with at least 2 level rotary flow holes that the contraction aperture is arranged around the chamber of hitting mutually, each whirl hole center line can meet at and hit the center, chamber mutually, at each middle part, level rotary flow hole the one perpendicular vertical core that communicates is arranged, the cylindrical of vertical core and whirl hole side bus are tangent substantially, the inlet of each vertical core is positioned at atomizing stem stem end face and towards the nozzle boss import, being packed in the nozzle boss hole close joining of external cylindrical surface of atomizing core.
2, single injector enclosed mesolow fine mist spray head as claimed in claim 1, it is characterized in that being provided with filter in the nozzle boss hole between the import of nozzle boss and atomizing core, or all steep device and current equalizer, and all steep device and be provided with and all steep the device cover, all steep outlet of device cover or inlet and be equiped with orifice plate or net; Current equalizer is a kind of multichannel barrier current equalizer or for many vanes stator current equalizer or for many paddles rotor current equalizer, current equalizer is located at and is all steeped in the device cover, or current equalizer with all steep device and be connected in series.
3, the described single injector enclosed of claim 1 mesolow fine mist spray head is characterized in that being provided with one and spatters the mist dish or spatter the mist plate on the shower nozzle framework; Spattering the mist plate is to be located at the thin baffle plate of rectangle parallel with shower nozzle on the side formula shower nozzle framework support plate, and spattering the mist dish is the thin dish of being located at positive central authorities of vertical shower nozzle framework and shower nozzle axis normal; Spattering the mist dish is fixed thin dish, and thin coiling is provided with straight joint or hole, spatters the mist dish or is the rotating mist dish that spatters, and spatters the mist dish and is provided with 3～8 sectors with angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100815501A CN100496643C (en) | 2005-07-01 | 2005-07-01 | Closed type middle and low pressure water mist sprayer with single spraying nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100815501A CN100496643C (en) | 2005-07-01 | 2005-07-01 | Closed type middle and low pressure water mist sprayer with single spraying nozzle |
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| Publication Number | Publication Date |
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| CN1701828A CN1701828A (en) | 2005-11-30 |
| CN100496643C true CN100496643C (en) | 2009-06-10 |
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| CNB2005100815501A Expired - Fee Related CN100496643C (en) | 2005-07-01 | 2005-07-01 | Closed type middle and low pressure water mist sprayer with single spraying nozzle |
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| CN100429003C (en) * | 2006-09-04 | 2008-10-29 | 韩铁夫 | Slender water fog jet with double-ring surface crack nozzle |
| WO2010006542A1 (en) * | 2008-07-12 | 2010-01-21 | Han Tiefu | Spray device |
| US8833676B2 (en) * | 2008-07-18 | 2014-09-16 | Tie fu Han | Spraying device |
| CN102294092B (en) * | 2010-06-28 | 2016-05-18 | 陕西兰德森茂消防科技有限公司 | Disturbance component and extinguishing device |
| WO2013117907A2 (en) | 2012-02-07 | 2013-08-15 | Marioff Corporation | Water mist fire suppression sprinkler with a polymer seal |
| WO2016192016A1 (en) * | 2015-06-01 | 2016-12-08 | 深圳市大疆创新科技有限公司 | Spray head structure and unmanned aircraft using same |
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| CN112274831B (en) * | 2020-10-31 | 2021-12-10 | 浦江县知石工贸有限公司 | Fireproof automatic spray nozzle |
| CN114400553A (en) * | 2021-12-23 | 2022-04-26 | 上海盖尔电力安装有限公司 | Prepackage type box-type substation |
| CN115382135A (en) * | 2022-08-03 | 2022-11-25 | 中北大学 | Fire extinguishing system with explosion point sensing and water mist spraying functions |
| CN115382681A (en) * | 2022-08-03 | 2022-11-25 | 中北大学 | Water mist nozzle of suspension dust |
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| CN1701828A (en) | 2005-11-30 |
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