CN205460603U - Even stable supersonic extinguishing device in flow field - Google Patents

Abstract

The utility model provides an even stable supersonic extinguishing device in flow field, including supersonic flow nozzle, flexible rubber hose, air supply storage tank and air compressor, the supersonic flow nozzle passes through flexible rubber hose and air supply storage tank intercommunication, all is equipped with the stop valve between supersonic flow nozzle and the flexible rubber hose and between flexible rubber hose and the air supply storage tank, air compressor and air supply storage tank intercommunication, the internal face of supersonic flow nozzle is the curved surface based on the typical line method design of cubic B spline curve configuration axis mach number distribution. This neotype supersonic extinguishing device overall structure retrencies, the adoption is because the supersonic flow nozzle of the typical line method design play that cubic B spline curve configuration axis mach number distributes can make the high -quality supersonic flow field that jet exit acquisition homogeneity is good, the air speed is accurate, do not deposit concentrated wave system, the combination in supersonic and air source for air current duration is long when putting out a fire, stability is good, and fire extinguishing efficiency is high, and fire -extinguishing mode does not lead to the fact secondary pollution, green.

Description

The supersonic speed extinguishing device that a kind of even flow field is stable

Technical field

This utility model relates to extinguishing device field, especially, relating to the supersonic speed extinguishing device that a kind of even flow field is stable.

Background technology

Fire extinguisher, also known as fire extinguisher, is a kind of portable Fire extinguisher.The built-in chemical substance of fire extinguisher.Fire extinguisher is common One of fireproofing installation, leaves public place or it may happen that the place of fire alarm in.The kind of fire extinguisher is a lot, by its move mode Can be divided into: portable and cart type；Can be divided into by the power resources driving extinguishing chemical: gas storage vial-type, pressure storage type, chemical reaction Formula；Can be divided into the most again by the extinguishing chemical filled: foam, dry powder, alkyl halide, carbon dioxide, clear water etc..

Utilizing material principle of extremely difficult burning under the conditions of supersonic speed, some scholars proposes supersonic speed fire extinguishing, and Details as Follows:

The patent of Application No. 96201367.6 provides the self-control supersonic fire extinguisher of a kind of strong, at the arc transition of its body in Wall extends internally an arc-shaped curved surface body, and there is nozzle on its surface, and the two ends in hole are tapered, and mid portion is cylindrical, at curved body Lower section is equipped with extinguishing chemical, and body bottom portion stretches out a disc, and affixed with screen, automatic control circuit is contained in circuit box and initiator Between cavity in, automatic control circuit includes that thermal infrared controls circuit and temperature control circuitry, and initiator causes after accepting signal and produces Combustion gas stream, through nozzle, forms supersonic flow, makes extinguishing chemical nebulize ejection, by screen water conservancy diversion, although this this device energy Play certain extinguishing effect, but complicated integral structure, and cost is high, is unfavorable for promoting the use of.

The patent of Application No. 02259174.5 provides a kind of stereo car parking frame automatic fire-fighting device, by pressure vessel, compression Gas cylinder, power initiating device and supersonic speed aerosol generator are formed, and are that a kind of collection powder extinguishing agent stores, pulverizes, automatically Causing and put out a fire in the novel fire extinguisher of one, when a fire starts and spreads, compressed gas forms two phase flow automatically into dry powder storehouse, agitation dry powder Enter supersonic speed aerosol generator, dry powder is ground into superfine powder and is sprayed to fire point by nozzle, form aerosol fire-extinguishing, this kind The extinguishing effect of fire extinguisher is preferable, but it is by means of dry powder, causes secondary pollution, uncomfortable in the place such as museum, reference room Closing and use, practicality is the strongest.

Therefore, design a kind of structure simplify and efficient, the concrete important meaning of extinguishing device of environmental protection fire extinguishing can be realized.

Utility model content

This utility model purpose is to provide a kind of supersonic speed extinguishing device with flow field sustainability, uniformity and stability, Concrete technical scheme is as follows:

The supersonic speed extinguishing device that a kind of even flow field is stable, including supersonic nozzle, rubber hose, source of the gas storage tank and air Compressor；

The end of described supersonic nozzle is connected with the inside of described source of the gas storage tank by rubber hose, described supersonic nozzle and institute State and between rubber hose, be provided with the first stop valve；Air relief valve and it is sequentially provided with between described rubber hose and described source of the gas storage tank Two stop valves；

Described air compressor connects with described source of the gas storage tank, and is provided with the 3rd stop valve between the two；

Described source of the gas storage tank is provided with safety relief valve and Pressure gauge；

Described supersonic nozzle includes that the nozzle singlet that single or two or more is uniform, described nozzle singlet include a pipeline, First being shunk by the internal face of its front end to pipeline described in end direction and expand afterwards, described internal face is for join based on B-spline Curve Put the curved surface of the characteristic line method design of axis Mach Number Distribution.

In above technical scheme preferably, described nozzle singlet is to spray flat air-flow or the nozzle of column air-flow.

In order to reach superior technique effect, described source of the gas storage tank is additionally provided with the interface pipe being connected with extraneous source of the gas, described Interface pipe is provided with the 4th stop valve.

In order to reach superior technique effect, also include that controlling described supersonic nozzle at ejection air-flow and does not spray air-flow shape The electromagnetic valve switched under state and the control being connected with described electromagnetic valve switch.

In order to reach superior technique effect, also include that hand propelled moves dolly, described source of the gas storage tank and described air compressor It is arranged at described hand propelled to move on dolly.

Application the technical solution of the utility model, has the advantages that

(1) the supersonic speed extinguishing device that even flow field of the present utility model is stable includes that supersonic nozzle, rubber hose, source of the gas store up Tank, air compressor etc., overall structure simplifies, low cost；Use and configure axis Mach Number Distribution based on B-spline Curve The supersonic nozzle designed of characteristic line method, it is possible to uniformity is good, air velocity accurately, does not deposit collection to make jet expansion obtain The high-quality supersonic flow field of middle wave system, and air-flow of its ejection has the feature of persistent period length and good stability, so may be used With guarantee high velocity air to flare or the Efficient Coverage Rate of comburant, thus improve fire-fighting efficiency；Use the runner of supersonic nozzle Design, utilize material extremely difficult burning under the conditions of supersonic speed principle and utilize cheap and sufficient ambient air as source of the gas, Thering is provided new means for fight fire, fire-fighting mode does not results in secondary pollution, environmental protection；Supersonic flow can make comburant Being at extremely severe environment in moment and cannot continue to burning, the cryogenic effect that high-speed gas is brought can reduce combustion Burning thing temperature and make it below burning-point, the steam in condensation surrounding is formed on comburant surface and covers thus to a certain degree simultaneously Upper isolation oxygen, it addition, the powerful shearing force of high-speed gas can by dispersion, collide comburant, therefore, this utility model stream Uniform and stable supersonic speed extinguishing device is difficult to damage valuable comburant, hydropenia or some be not suitable for going out with existing The occasion of fire means can play a role, and with existing fire extinguishing means with the use of, it is possible to increase fire-fighting efficiency, reduces water The consumption of resource.

(2) in this utility model, nozzle singlet is to spray flat air-flow or the nozzle of column air-flow, can select according to the actual requirements Difform nozzle, in view of produced by the shape difference of nozzle, supersonic flow parcel is also different, can be in suitable occasion Play respective effect, practical.

(3) being additionally provided with the interface pipe being connected with extraneous source of the gas in this utility model on source of the gas storage tank, this interface pipe is for tight It is connected with external air source, to reach the purpose of Fast Filling time anxious, it is simple to make full use of the large-scale source of the gas making land used be possessed or big The conditions such as type pressure apparatus, practical and fire-fighting efficiency can be improved.

(4) this utility model also includes the electromagnetic valve controlling described supersonic nozzle switch and the control being connected with described electromagnetic valve System switch, it is simple to control the jet of supersonic nozzle, easy to control and different conditions can be met.

(5) also including in this utility model that hand propelled moves dolly, described source of the gas storage tank and described air compressor are arranged at Described hand propelled moves on dolly, it is simple to the movement of whole extinguishing device, improves fire-fighting efficiency.

In addition to objects, features and advantages described above, this utility model also has other objects, features and advantages. Below with reference to figure, this utility model is described in further detail.

Accompanying drawing explanation

The accompanying drawing of the part constituting the application is used for providing and being further appreciated by of the present utility model, of the present utility model schematically Embodiment and explanation thereof are used for explaining this utility model, are not intended that improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the overall structure schematic diagram of the supersonic speed extinguishing device that even flow field is stable in this utility model preferred embodiment 1；

Fig. 2 is the overall structure schematic diagram of supersonic speed another angle of extinguishing device that even flow field is stable in Fig. 1；

Fig. 3 is the F direction view of supersonic nozzle in Fig. 1；

Fig. 4 is the E-E sectional view of supersonic nozzle in Fig. 1；

Fig. 5 is a kind of structural representation of supersonic nozzle in Fig. 1；

Fig. 6 is the stress and strain model schematic diagram of supersonic nozzle in Fig. 1；

Fig. 7 is the Mach Number Distribution figure of supersonic nozzle outlet in Fig. 1；

Fig. 8 be in Fig. 1 supersonic nozzle by entrance to Way out along the Mach Number Distribution figure of nozzle axis；

Fig. 9 be in Fig. 1 supersonic nozzle by entrance to Way out along the gas flow temperature scattergram of nozzle axis；

Figure 10 be in Fig. 1 supersonic nozzle by entrance to Way out along the stream pressure scattergram of nozzle axis；

Figure 11 is the another kind of structural representation of supersonic nozzle in Fig. 1.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this utility model can be according to claim The multitude of different ways limited and cover is implemented.

Embodiment 1:

The supersonic speed extinguishing device that a kind of even flow field is stable, the nozzle of its design Mach 2 ship 2.0, if the pressure of its source of the gas is 8 Individual atmospheric pressure, gas source temperature is 25 degrees Celsius, then in the supersonic flow 517m/s that nozzle exit is formed, the temperature of air-flow Only having subzero 100 degrees centigrade, stagnation pressure reaches 5～6 atmospheric pressure.

The concrete structure of the supersonic speed extinguishing device that this utility model even flow field is stable refers to Fig. 1 and Fig. 2, sprays including supersonic speed Mouth 1, rubber hose 3, source of the gas storage tank 6, air compressor 11 and hand propelled move dolly 12.

The end of described supersonic nozzle 1 is connected with the inside of described source of the gas storage tank 6 by rubber hose 3, and described supersonic speed is sprayed The first stop valve 2 it is provided with between mouth 1 and described rubber hose 3；Set successively between described rubber hose 3 and described source of the gas storage tank 6 There are air relief valve 4 and the second stop valve 5.

Described air compressor 11 connects with described source of the gas storage tank 6, and is provided with the 3rd stop valve 10 between the two.

Described source of the gas storage tank 6 is provided with safety relief valve 7 and Pressure gauge 8.

Described supersonic nozzle 1 includes that four uniform nozzle singlet 1.1 (can also select according to practical situation by the quantity of nozzle singlet Select), the angle between the axis of adjacent two described nozzle singlet is 90 °, refers to Fig. 3 and Fig. 4.This kind uses multiple nozzles The design of the combination of single-piece, it is possible to increase the area coverage of nozzle ejection gas, it is possible to increase the jet length of gas, it is possible to subtract The consumption of few air-flow, also can reasonably control the impulsive force of air-flow simultaneously, be greatly improved extinguishing effect.

Described nozzle singlet 1.1 can be designed to spray the nozzle of column air-flow, i.e. ejection air-flow is axisymmetric form, refers to figure 3.Described nozzle singlet includes pipeline, the internal face of its front end to pipeline described in end direction first shrink and expand afterwards, described inwall Face is the curved surface of characteristic line method design based on B-spline Curve configuration axis Mach Number Distribution, and this kind of method is in national defence section The university's Zhao Yuxin that learns a skill is mentioned in the paper " experimentation of mixed supersonic layer space-time structure " delivered for 2008, tool Body is as follows:

In nozzle designs, in order to ensure the continual curvature of wall, it is continuous that the Mach number of axis should meet second dervative, therefore Suitable interpolation method should be used to give Mach Number Distribution.Traditional method is typically all according to two end points of high order curve respectively The end-point condition that should meet determines the coefficient of curvilinear equation, and then determines curvilinear equation.Mach Number Distribution is determined with high order curve Have a fatal shortcoming be exactly once boundary condition give, curve shape just cannot adjust, and Mach Number Distribution also thereby determines that, this Time be likely to cause nozzle interior characteristic curve iterative algorithm to restrain because curve regional area curvature is excessive.For understanding Certainly this problem, this utility model have employed B-spline curves.

B-spline curves also have locality, differentiability and convex closure in addition to having variation reduction property, geometric invariance.Due to The locality of B-spline curves, the point on the B-spline curves of k rank is at most relevant with k control vertex, mobile a certain control point, extremely Affecting the curve shape in this interval, remaining curved section does not changes more, and this feature ensure that local Mach in nozzle design The adjustability of number；The differentiability of B-spline curves shows, is infinitely can be micro-, is k-r time at node inside each curved section Can be micro-, wherein r is the multiplicity of node, and this character can ensure that the seriality of nozzle wall surface curvature；Convex closure ensure that B-spline curves, in convex closure union defined in individual summit, the most also would not occur what high order interpolation curve was likely to occur Gibbs phenomenon.

It is, in general, that nozzle design in should be ensured that wall continual curvature, B-spline Curve can meet this condition, itself and Formula form is:

$r_i\left(u\right)=\left[\begin{array}{cccc}1& u& u^2& u^3\end{array}\right]\frac{1}{6}\left[\begin{array}{cccc}1& 4& 1& 0\\ -3& 0& 3& 0\\ 3& -6& 3& 0\\ -1& 3& -3& 1\end{array}\right]\left[\begin{array}{c}{V}_i\\ V_{i+1}\\ V_{i+2}\\ V_{i+3}\end{array}\right]$

Wherein: 0≤u≤1, V_i、V_i+1、V_i+2And V_i+3For control vertex.Due to the above-mentioned character of B-spline curves, This case utilizes B-spline Curve to give the Mach Number Distribution of nozzle-axis, then uses the method for characteristic curves (in the method is industry Known to) carry out the iterative of interior flow field.Coordinate by suitable each summit of adjustment B-spline Curve is the most permissible Adjust the curve shape of nozzle wall surface, thus achieve the supersonic nozzle design of adjustable molded line.

Owing to the distribution of Mach number is configured with by B-spline Curve, other flow parameters (temperature, pressure etc.) are also accordingly Can determine, thus ensure that the uniformity of Nozzle Flow Field.

In addition, it is the shape of two dimension that described nozzle singlet 1.1 is also designed to spray the nozzle of flat air-flow, i.e. ejection air-flow Formula, refers to Figure 11, can select difform nozzle according to the actual requirements, in view of ultrasonic produced by the shape difference of nozzle Speed air-flow parcel is also different, can play respective effect in suitable occasion, practical.

Axial symmetry nozzle and two dimensional nozzle difference in design, is that the form of the governing equation in its flow field is different.But be all through Cross employing B-spline Curve configuration axis (axial symmetry nozzle) or then plane of symmetry axis (two dimensional nozzle) Mach number is adopted Solving the process in flow field by characteristic method, thus obtain the concrete profile of nozzle, Details as Follows:

(1) the flow field control equation of two dimensional nozzle, specific as follows:

$\left\{\begin{array}{c}\frac{\∂\mathrm{\ρ}}{\∂t}+\frac{\∂\left({\mathrm{\ρV}}_x\right)}{\∂x}+\frac{\∂\left({\mathrm{\ρV}}_y\right)}{\∂y}=0\\ \frac{\∂V_x}{\∂t}+V_x\frac{\∂V_x}{\∂x}+V_y\frac{\∂V_x}{\∂y}=f_x-\frac{1}{\mathrm{\ρ}}\frac{\∂p}{\∂x}\\ \frac{\∂V_y}{\∂t}+V_x\frac{\∂V_y}{\∂x}+V_y\frac{\∂V_y}{\∂y}=f_y-\frac{1}{\mathrm{\ρ}}\frac{\∂p}{\∂y}\end{array}\right.$

(2) the flow field control equation of axial symmetry nozzle, specific as follows:

$\left\{\begin{array}{c}\frac{\∂\mathrm{\ρ}}{\∂t}+\frac{\∂\left({\mathrm{\ρV}}_x\right)}{\∂x}+\frac{1}{r}\·\frac{\∂\left({\mathrm{\ρrV}}_r\right)}{\∂r}=0\\ \frac{\∂V_x}{\∂t}+V_x\frac{\∂V_x}{\∂x}+V_r\frac{\∂V_x}{\∂r}=f_x-\frac{1}{\mathrm{\ρ}}\frac{\∂p}{\∂x}\\ \frac{\∂V_r}{\∂t}+V_x\frac{\∂V_r}{\∂x}+V_r\frac{\∂V_r}{\∂r}=f_r-\frac{1}{\mathrm{\ρ}}\frac{\∂p}{\∂r}\end{array}\right.$

Pipeline herein uses aluminum alloy material, extends its service life, in addition to this it is possible to select it according to the actual requirements The conventional material such as he (such as rustless steel), practical.

Described source of the gas storage tank 6 is additionally provided with the interface pipe 9 being connected with extraneous source of the gas, and described interface pipe 9 is provided with the 4th cut-off Valve 9.1, this interface pipe is connected with external air source when urgent, to reach the purpose of Fast Filling, also allows for abundant profit simultaneously By conditions such as the large-scale source of the gas that possessed of outside or large-scale pressure apparatus, practical and fire-fighting efficiency can be improved.

Described source of the gas storage tank 6 and described air compressor 11 are arranged at described hand propelled and move on dolly 12, it is simple to whole go out The movement of fire device, improves fire-fighting efficiency.

The supersonic speed extinguishing device that this utility model even flow field is stable also includes controlling described supersonic nozzle 1 and sprays air-flow or not The electromagnetic valve spraying air-flow and the control being connected with described electromagnetic valve switch, control ultrasonic by controlling on-off control electromagnetic valve Speed nozzle 1 switches under air-flow two states at ejection air-flow and not spraying, easy to control and can meet different conditions.

The supersonic speed extinguishing device that this utility model even flow field is stable uses supersonic speed and the combination of air source, utilizes material super The principle of extremely difficult burning and utilize cheap and sufficient ambient air as source of the gas under sonic conditions, provides new for fight fire Means, supersonic flow can make comburant be at extremely severe environment in moment and cannot continue to burning, high-speed gas The cryogenic effect brought can reduce comburant temperature and make it below burning-point, and the steam in condensation surrounding is at comburant simultaneously Surface is formed and covers thus isolate oxygen to a certain extent, it addition, the powerful shearing force of high-speed gas can by dispersion, collide Comburant, therefore, the supersonic speed extinguishing device that this utility model even flow field is stable, it is difficult to valuable comburant is damaged, Hydropenia or some be not suitable for can playing a role by the occasion of existing fire extinguishing means, and with existing fire extinguishing means with the use of, Fire-fighting efficiency can be improved, reduce the consumption to water resource.

The workflow of the supersonic speed extinguishing device that this utility model even flow field is stable is as follows:

First using deposit compressed air in source of the gas storage tank 6 (also dependent on the demand of reality application use such as the noble gases such as nitrogen as Source of the gas)；

Fire extinguishing: open the first stop valve 2 and the second stop valve 5, air relief valve 4 is regulated to suitable size, supersonic nozzle 1 Can form supersonic flow, rubber hose 3 can adjust the aligning direction of nozzle；

Inflation: when insufficient pressure in source of the gas storage tank 6, starts air compressor 11, opens the 3rd stop valve 10, closes first Stop valve 2, air relief valve 4 and the second stop valve 5, can be inflated source of the gas storage tank 6；If it addition, having outside large-scale Source of the gas or large-scale pressure apparatus, it is also possible to be inflated by reserved interface pipe 9, particularly as follows: open the 4th stop valve 9.1, External air source enters source of the gas storage tank 6 through interface pipe 9；

Pressure release: when source of the gas storage tank 6 because of the blowing pressure excessive time, safety relief valve 7 can releasing pressure automatically, Pressure gauge 8 can also time Carve reflection pressure within source of the gas storage tank 6.

Use business software Fluent being widely used at present that designed supersonic nozzle is carried out Numerical Simulation, can obtain Obtaining the basic parameter distribution of nozzle air current, Details as Follows:

1, the flow channel space in nozzle is carried out numerical discretization, obtain stress and strain model, refer to Fig. 6；

2, first, boundary value condition is set in Fluent software, is calculated the flow parameter of nozzle, including Mach Number Distribution, temperature Degree distribution and pressure distribution, be shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10 respectively, from figure 7 it can be seen that the Mach number of jet expansion Can reach design objective, and Mach number is kept as very well in whole outlet, the supersonic flow with larger area covers Capping；From Fig. 8, Fig. 9 and Figure 10 it can be seen that the Mach number of nozzle, temperature, pressure equal distribution are along axis On direction highly uniform, nozzle interior does not has the sudden change of obvious parameter and a wave system structure, thus ensure that the uniformity in flow field and steady Qualitative.

In sum, the result of emulation shows: the gas flow temperature in nozzle, pressure, Mach Number Distribution are uniform, the gas in exit Temperature low (outlet temperature is-130 °), pressure and speed reach design objective.The nozzle that this method for designing obtains ensure that stream There is no the wave system structure concentrated, Mach number, temperature, pressure even transition in flow field in Chang, thus ensure that jet expansion is certain It is capable of uniform supersonic flow, optimal extinguishing effect can be reached.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this area For technical staff, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, institute Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (5)

1. the supersonic speed extinguishing device that an even flow field is stable, it is characterised in that: include supersonic nozzle (1), rubber hose (3), source of the gas storage tank (6) and air compressor (11)；

The end of described supersonic nozzle (1) is connected with the inside of described source of the gas storage tank (6) by rubber hose (3), described The first stop valve (2) it is provided with between supersonic nozzle (1) and described rubber hose (3)；Described rubber hose (3) is with described Air relief valve (4) and the second stop valve (5) it is sequentially provided with between source of the gas storage tank (6)；

Described air compressor (11) connects with described source of the gas storage tank (6), and is provided with the 3rd stop valve (10) between the two；

Described source of the gas storage tank (6) is provided with safety relief valve (7) and Pressure gauge (8)；

Described supersonic nozzle (1) includes the nozzle singlet (1.1) that single or two or more is uniform, described nozzle singlet (1.1) Including a pipeline, the internal face of its front end to pipeline described in end direction first shrinking and expand afterwards, described internal face is based on three The curved surface of the characteristic line method design of secondary B-spline curves configuration axis Mach Number Distribution.

The supersonic speed extinguishing device that even flow field the most according to claim 1 is stable, it is characterised in that: described nozzle singlet For spraying flat air-flow or the nozzle of column air-flow.

3. according to the supersonic speed extinguishing device that the even flow field described in claim 1-2 any one is stable, it is characterised in that: institute Stating and be additionally provided with the interface pipe (9) being connected with extraneous source of the gas on source of the gas storage tank (6), described interface pipe (9) is provided with the Four stop valves (9.1).

The supersonic speed extinguishing device that even flow field the most according to claim 3 is stable, it is characterised in that: also include controlling institute State supersonic nozzle (1) ejection air-flow and do not spray the electromagnetic valve switched under air-flow state and with described electromagnetic valve The control switch connected.

The supersonic speed extinguishing device that even flow field the most according to claim 4 is stable, it is characterised in that: also include hand propelled Mobile dolly (12), described source of the gas storage tank (6) and described air compressor (11) are arranged at described hand propelled and move dolly (12) on.