TWI733914B - Noise-absorbing fire extinguisher nozzle device with frequency selective noise-absorbing layer and using method thereof - Google Patents

Abstract

The present invention provides a muffler fire extinguisher nozzle device (1) for building fire-fighting facilities, which has at least one fire extinguisher nozzle (11) for extinguishing agent to flow out, and a muffler (2) for each fire extinguisher nozzle. Each fire extinguisher nozzle has at least one outlet (12), and its opening at least perpendicular to the diffusion direction is 3mm at most. Each silencer has a frequency selective silencer layer (22), which is arranged so that the jet of fire extinguishing agent sprayed from each outlet will impact on the silencer layer in the diffusion direction (SA). The latter has a sound absorption rate (α) that rises from a sound frequency (f) of 125 Hz, and is preferably a melamine resin foam. In addition, the present invention relates to the application of a frequency-selective sound-absorbing layer, which is installed on a fire extinguisher nozzle of an inert gas fire-fighting facility of a building, to reduce the noise level (L _pk ) during the fire-fighting process.

Description

Noise-absorbing fire extinguisher nozzle device with frequency selective noise-absorbing layer and using method thereof

The present invention relates to a silencer fire extinguisher nozzle device for fire-fighting facilities in buildings, which has at least one fire extinguisher nozzle for spraying fire extinguishing agent. Each fire extinguisher nozzle has at least one outlet, and its opening at least perpendicular to the diffusion direction is 3mm at most.

In the prior art, there have been gas fire extinguishing facilities and fire extinguishing methods. When the extinguishing agent is released, the extinguishing agent can be guided from the pressure vessel to one or more fire extinguisher nozzles through the container valve and duct system. The fire extinguishing agent (separately) stored in the pressure vessel can be, for example, inert gas such as nitrogen, argon, or carbon dioxide. Or the fire extinguishing agent may include fire extinguishing liquid and propellant gas. In this case, the fire extinguishing fluid system is a fire extinguishing fluid that can play a chemical role, which is particularly based on halogen hydrocarbons (Halone), such as HFC-227 or HFC-23, or based on fluorinated ketones, such as FK- Based on 5-1-12, its marketing name is Novec®1230. The driving gas is preferably inert gas, such as nitrogen or argon, or carbon dioxide.

There have been various implementation forms for fire extinguisher nozzles of fire-fighting facilities in buildings. Generally, pipes are installed at the outflow point of fire-fighting facilities. The appropriate practice is to install the fire-fighting facilities of the building on the ceiling, and set up multiple outflow points according to the size of the space and the geometric conditions of the space. The end of the pipe is closed with a fire extinguisher nozzle, which is usually made as a screw fitting to simplify installation. A typical example of a fire extinguisher nozzle is a cap nut as an end cover, in which a hole is drilled as an outlet for the fire extinguishing agent.

The disadvantage of all current fire extinguisher nozzles is that they generate a lot of noise during the fire extinguishing process. The noise level of different nozzles can reach 140 decibels, which is in the range of harming human hearing. In addition, the equipment in the fire fighting space will also be damaged. In particular, the high noise level poses a problem to the stability of the computer hard disk in the computing and information center. Experience has shown that computer hard drives start to make mistakes at a noise level of 120 decibels, and some even at 90 decibels. At higher noise levels, permanent damage or even destruction may occur.

To alleviate this problem, the prior art uses a muffler, such as a sintered body, which is placed behind the nozzle of the fire extinguisher and is flowed through. When flowing through this additional structure, the flow rate drops drastically, making it difficult for the indoor air to fully mix with the fire extinguishing gas.

In the applicant’s international publication WO 2012/136468 A2, a device with at least one outlet for spraying fire extinguishing agent is disclosed. Vortex, so it will not broadcast sound waves of the wavelength that humans perceive in the audio spectrum. This is determined by the geometry of the outlet. According to the embodiment in this document, the outlet is composed of a plurality of arranged small openings, such as drilled holes. The arrangement of the openings makes the overall effect on the extinguishing agent flowing out basically equal to a continuous opening. Through this, the maximum noise can be reduced to 90 decibels.

Due to the linear shape of the outlet and the geometric shape of the flat jet, on the one hand, the fluid vortex is greatly reduced, so that the entire sound wave power of the generated sound wave is significantly reduced. On the other hand, the frequency spectrum of the sound wave moves toward high frequencies, that is, Move to audio above 10kHz.

Compared with the aforementioned conventional fire extinguisher nozzles, the frequency spectrum of the sound waves generated in the perceptible audio zone shifts to high frequencies by about two to three orders of magnitude. In addition, the overall noise level bandwidth is advantageously reduced by approximately 20 decibels. This has nothing to do with whether the flat jet flows through the slot-shaped outlet or through the arranged multiple small holes or drilled holes. The arranged small holes are in close contact with each other and immediately synthesize into a common flat jet.

Even though the noise reduction fire extinguisher nozzle described in WO 2012/136468 A2 can achieve significant noise reduction, the noise reduction effect is still small in the frequency range of more than 10kHz, which is determined by the structure. It has been shown that the remaining high-frequency jet noise will still interfere with and damage sensitive computer hard disks.

Based on this, the purpose of the present invention is to provide an improved fire extinguisher nozzle device.

The object of the present invention is achieved by a muffler fire extinguisher nozzle device, and the nozzle assembly has a muffler for each fire extinguisher nozzle. Each silencer includes a frequency selective silencer layer, which is arranged to make the fire extinguishing agent sprayed from each outlet impact on the silencer layer in the diffusion direction. The sound-absorbing layer has a (significantly) increase in sound absorption rate α from 125 Hz for audio frequency, especially from 250 Hz. In particular, the sound absorption rate α of the sound-absorbing layer starts to increase from 0.1 or the maximum 0.1 (significantly) starting from the frequency value of 125 Hz or 250 Hz.

The basic idea of the present invention is to advantageously combine the noise reduction fire extinguisher nozzle and the frequency selective sound-absorbing layer according to the aforementioned WO 2012/136468 A2. In the meantime, by reducing the noise of the fire extinguisher nozzle, the low frequency spectrum from 125Hz and 250Hz, which is difficult to be weakened, is moved to the higher frequency spectrum above 10kHz, and the production of the low frequency spectrum is effectively reduced. The sound-absorbing layer of the high-frequency spectrum just left here has a strong attenuation effect, and the sound-absorbing layer is completely unsuitable for the low-frequency spectrum that is difficult to attenuate.

Through this, a thin silencing layer is sufficient to effectively attenuate the remaining high-frequency spectrum.

Another advantage lies in the realization of a muffler with relatively small technical and construction costs. Through this, a muffler can be installed on an existing noise reduction fire fighting facility in a simple manner.

In contrast, the aforementioned conventional fire extinguisher nozzles with larger outlets require large-volume, labyrinth-type and barrier-type silencer devices to effectively silence the sound. Another disadvantage of this silencer is that it protrudes a lot in the room and it is slow to provide fire extinguishing agent.

The sound absorption rate α represents the rate of absorption in the total sound produced. If the sound absorption rate is 1, it means that all generated sound is absorbed. In other words, there is no reflection. Conversely, if the sound absorption rate is zero, there is no absorption. All the sounds produced are reflected. The value of the sound absorption rate α is usually between 0.1 and 0.9, which varies with the noise reduction system, and depends on the surface material and the sound frequency.

According to an embodiment, the sound absorption rate α of the sound-absorbing layer at a frequency value of 125 Hz, especially above a frequency value of 250 Hz, increases from 0.1, or a maximum of 0.1, and from the frequency value of 5000 Hz, or even earlier from the frequency value of 1000 Hz, the sound absorption rate α reaches At least 0.9.

In an advantageous embodiment, each fire extinguisher nozzle has at least one outlet, the geometry of which is at least perpendicular to the direction of diffusion, with an opening of a maximum of 1 mm, in particular a maximum of 0.5 mm. As a result, the frequency spectrum of the sound moves especially above 10kHz, especially above 50kHz. In such a high frequency range, it can produce effective noise cancellation with a small noise cancellation cost.

According to a preferred embodiment, the sound-absorbing layer is a foamed material with open pores, especially a foamed plastic. It is usually an open and porous melamine resin foam. The sound-absorbing layer can also be a mineral fiber layer. The sound-absorbing layer with penetrating open pores is particularly suitable for converting the kinetic energy of sound energy into heat energy through friction, thereby reducing the sound energy. The other advantage of the sound-absorbing layer made of melamine resin foam is that it also meets the high requirements of fire protection, that is, it is extremely non-flammable.

In another embodiment, the layer thickness of the sound-absorbing layer is in the range of 5 mm to 50 mm, especially in the range of 10 mm to 30 mm.

According to another embodiment, the silencer parameters of the silencer are adjusted to the outlet of the fire extinguisher nozzle, so that the noise level during the fire extinguishing process does not exceed 85 decibels, especially 80 decibels. The allowable maximum noise value can be adjusted, for example, by selecting an appropriate layer thickness and/or average hole size of the sound-absorbing layer.

In another embodiment, the fire extinguishing agent prepared for fire extinguishing is an inert gas, especially nitrogen, argon, or carbon dioxide. It can also be a chemical fire extinguishing agent, such as Halon, HFC227 or Novec1230.

It is particularly advantageous that the shape of each outlet in the fire extinguisher nozzle is designed so that the sprayed fire extinguishing agent has a flat jet shape. As a result, the frequency spectrum of the sound is particularly moved above 10kHz. In particular, each outlet has a slit-like or slot-like geometry.

According to an embodiment, the outlets extend along a straight line or along an arc, especially along a circular arc.

According to a particularly advantageous embodiment, each outlet has a plurality of openings or bores, which are specifically arranged so that the effect of the sprayed fire extinguishing agent is essentially the same as that of a continuous hole. In other words, each outlet is composed of multiple openings or drilled holes. The maximum diameter of the opening or drilling is 1mm, especially 0.5mm.

According to a particularly advantageous embodiment, the fire extinguisher nozzle is designed as a diffuser tube or a cylindrical cone nozzle. Each muffler is a muffler tube with a muffler layer on the inner side. The size of the muffler tube ensures that the muffler layer basically completely surrounds each outlet of the fire extinguisher nozzle. The distance between each outlet and the opposite sound-absorbing layer is at least between 5mm and 30mm, especially between 10mm and 20mm.

Here "completely enclosed" means that the tubular sound-absorbing layer surrounds the outlet along the entire axial extension of each outlet, especially a closed enclosure. The so-called "axial" here refers to the direction parallel to the axis of rotation of the muffler tube. Such a noise-absorbing fire extinguisher nozzle device is particularly space-saving. By keeping a distance between each outlet and the opposite sound-absorbing layer, there is sufficient space for the fire extinguishing agent sprayed from each outlet to diffuse in the radial and axial directions.

According to an advantageous embodiment, the muffler tube has an axially protruding tube, which is measured from an axially outer end of each outlet to the tube outlet. The protruding tube forms a sound absorption chamber with an axially protruding length of 5 cm It is in the range of 50 cm, especially in the range of 10 cm to 20 cm. The "following" absorption chamber advantageously reduces the noise level even further.

Corresponding to the muffler fire extinguisher nozzle device of the present invention, another purpose of the present invention is to reduce the noise during the fire extinguishing process through an advantageous application of a frequency selective muffler material, which is installed on the fire extinguisher nozzle of one of the inert gas fire-fighting facilities in the building Level, and reached. The fire extinguisher nozzle has at least one outlet, and its geometric shape is at least perpendicular to the diffusion direction. The opening is up to 3mm, especially up to 0.5mm, so that the vortex that appears in the jet of fire-extinguishing agent is basically emitted above 125Hz The rotation frequency of the sound in the higher frequency region. The muffler is arranged so that the fire extinguishing agent jets sprayed from each outlet will impact on the muffler layer in the diffusion direction and at a minimum distance. The sound-absorbing layer has a self-audio frequency of 125 Hz, especially a (significantly) increase in the sound absorption rate α from 250 Hz.

The above-mentioned characteristics, characteristics, and advantages of the present invention, as well as the methods and methods achieved by it, will be more clearly and clearly described in the following descriptions based on the embodiments, which are further described in conjunction with the drawings.

1. 1’: Fire extinguishing facilities

2: silencer

3: Tube end

10: Connection block

11: Fire extinguisher nozzle

12: Outlet

13: End of tube

14: Nut

15: tube neck

16: opening

17: Pipe section

18: Cone closed part

21: Jacket

22: silencing layer

22’: Elastic layer

23: Orifice plate

A: Diffuser shaft

AB: Sound absorption chamber

AR: outer diameter

AS: Silencer outer diameter

ASP: Absorption spectrum

B: Caliber

D: Ceiling

dB: decibel

DL: diffuser length

EIN: Inlet

f: frequency

Hz: Hertz

IN: Tube internal space

IR: inner diameter

IS: Silencer inner diameter

L: Length of outlet

L _pk : noise level

M: sleeve thickness

MA: minimum distance

M1-M3: Maximum

OF: Outflow

Q1: Cross section of diffuser

Q2: Intermediate space cross section

RA: Radial distance

RD: radial diameter

SA: Diffusion direction

SL: silencer length

S1-S3: Spectrum

TR: funnel

UM: commutation element

UB: protruding length

ZS: Intermediate space

α: Sound absorption rate

The figure shows: Figure 1 is based on a fire extinguisher nozzle device 1'of the prior art, with a tubular fire extinguisher nozzle 11 with a slot-shaped outlet 12, and Figure 2 is based on the fire extinguisher nozzle shown in Figure 1, along the cross-section A cross-sectional view of line II-II, Fig. 3 is a sound spectrum diagram of a conventional "lauten" fire extinguisher nozzle, a noise reduction fire extinguisher nozzle according to WO 2012/136468 A2, and a noise reduction fire extinguisher nozzle device according to the present invention , And the graph of the sound absorption rate α of the noise-absorbing material used in the fire extinguisher nozzle device of the present invention with frequency. Figure 4 shows the first embodiment of a tubular noise-absorbing fire extinguisher nozzle device of the present invention. Figure 5 and Figure 4 Nozzle device for silencer fire extinguisher, the outlet view seen along the line of sight V marked in the figure, Figure 6 is a second embodiment of a nozzle device for a tubular silencer fire extinguisher according to the present invention, with a plurality of slot-shaped outlets, Figure 7 is the present invention Invented a third embodiment of a nozzle device for a tubular sound-absorbing fire extinguisher, with a linear diffuser composed of a plurality of small boreholes arranged with each other. Fig. 8 is a fourth embodiment of a nozzle device for a tubular sound-absorbing fire extinguisher of the present invention, which has A reversing element for reversing the sprayed fire extinguishing agent to the ceiling according to the present invention. Fig. 9 is a fifth embodiment of a nozzle device for a tubular silencer fire extinguisher according to the present invention. It has a funnel for extinguishing agent discharge. Fig. 10 is a first invention. The sixth embodiment of the nozzle device of a tubular silencer fire extinguisher, with a bulbous muffler of the present invention, Fig. 11 longitudinal section view, cut through a conventional conical nozzle with an arc-shaped outlet, Fig. 12 The top view of the outlet as seen from the line of sight XII in Figure 11, and the top view of Figure 13, showing a conical nozzle with multiple small holes along a circular arc. Figure 14 The nozzle device of the muffler fire extinguisher of the present invention is the same. The first embodiment of the cone nozzle, Fig. 15 is the second embodiment of the silencer cone nozzle with the same T-shaped muffler, and Fig. 16 is the third embodiment of the present invention with a spherical muffler.

Figure 1 shows a prior art fire extinguisher nozzle device 1', which has a tubular fire extinguisher nozzle 11 and a slot-shaped outlet 12 extending along the nozzle.

The illustrated fire extinguisher nozzle device 1'has, for example, two such fire extinguisher nozzles 11, only one of which is shown in detail. The two fire extinguisher nozzles 11 are each connected together by a nut 14 and the T-shaped connecting block 10. The connecting block 10 itself is screwed on a pipe end 3, which extends from the ceiling D of the room to be extinguished. The extinguishing agent inlet pipe of the pipe connected to the pipe end 3 is supplied by a extinguishing agent container when extinguishing the fire. B indicates the caliber.

The working principle of the nozzle 11 of the conventional silencer fire extinguisher is based on the two-stage expansion of the fire extinguishing gas jet or the fire extinguishing agent jet. The diameter of the inlet of the connecting block 10 determines the hydraulic resistance and therefore the flow rate of the nozzles 11 of the two fire extinguishers. The pipeline pressure is significantly reduced through this, and is reduced to the internal pressure of the nozzle. In the first expansion, the sound energy has been significantly released, and the expansion noise generated stays inside the nozzle 11 of the fire extinguisher. During the second expansion, the internal pressure of the nozzle drops to ambient pressure, which corresponds to a smaller pressure drop.

The conventional tubular fire extinguisher nozzle 11 has a narrow slit along the pipe axis as an outlet 12. In the illustration here, the extinguishing agent is sprayed from the drawing surface. The fire extinguisher nozzle 11 is specially designed to make the cross section of the fire extinguishing agent jet SA (see Figure 2) very narrow in at least one direction, that is, the fire extinguishing agent sprayed is a very flat jet. As a result, the vortex in the free jet is insignificant and cannot radiate sound waves by sound frequency. In particular, the cross section of the fire extinguishing agent jet is extremely narrow in one direction, but elongated in the other direction. This kind of flat jet shape is particularly suitable to be produced by the crack or slot-shaped outlet opening 12 described above. Compared with the previous "loud" nozzle form, its approximately rotationally symmetrical gas flow flows out through a larger borehole with a diameter of 5 to 10mm. The advantage of the flat gas jet or liquid jet is that it cannot emit humans with frequencies higher than 10kHz. Listen to the audio vortex.

In addition, IN represents the internal space of the pipe, which is infused with extinguishing agent when extinguishing a fire. Let AR represent the fire extinguisher nozzle 11 and the outside diameter of the fire extinguishing pipe shown, and let DL represent the axial full length of the fire extinguishing pipe. The typical value of the outer diameter AR is 25mm, 30mm, or 35mm. The typical value of the axial length DL is 25cm, 30cm, or 35cm. The tubular fire extinguisher nozzle 11 is additionally closed at the axial end with a tube end 13 in the form of a cap.

Figure 2 shows a cross-sectional view of the fire extinguisher nozzle 11 seen along the line II-II in Figure 1. In this figure, on the one hand, the longitudinal axis A of the pipe and the diffusion direction SA of the extinguishing agent jet are also indicated, and the jet is jetted from the outlet 12 in the radial direction.

Figure 3 shows the frequency spectrum S1-S3 of a conventional "loud" fire extinguisher nozzle, the frequency spectrum of the muffler fire extinguisher nozzle according to WO 2012/136468 A2, the frequency spectrum of the muffler fire extinguisher nozzle according to the present invention, and the fire extinguisher nozzle device of the present invention The trend of the absorption spectrum (ASP) of the sound absorption rate α of the sound-absorbing layer used in the anechoic layer varies with the frequency.

L _pk represents the noise level, which is calculated as 1/3 octave, and its unit dB represents decibels. The frequency spectra S1-S3 are reported in logarithmic pairs of sound frequencies f. M1-M3 represent the maximum value of each spectrum S1-S3. In the figure shown, for example, the ASP trend of the sound absorption rate α of the sound-absorbing layer of the melamine resin foam is additionally shown.

The first measured spectrum S1 comes from a "loud" fire extinguisher nozzle, as shown in the aforementioned WO 2012/136468 A2 in Figure 1. It can be seen that the maximum sound level value reaches 110 decibels. Such a high decibel value makes human hearing painful. In addition, it has been proved that the computer hard disk has the wrong decibel value again and again.

The second audio spectrum S2 comes from an embodiment of a silencer fire extinguisher nozzle according to WO 2012/136468 A2, which has a plurality of 0.5mm diameter boreholes, and the boreholes are arranged back and forth along a straight line at a distance of 5mm. Compared with the aforementioned audio spectrum S1, the sound level is generally reduced by 20 decibels, and the maximum value is reduced to M2. In addition, it can be seen that the first frequency spectrum S1 is shifted to a high frequency above 10 kHz. However, the noise level value of S2 is significantly higher than the frequency spectrum S1 at 20kHz and higher.

The third spectrum S3 comes from a nozzle of the muffler fire extinguisher of the present invention. Use the same fire extinguisher nozzle as in the previous case. However, according to the present invention, a tubular muffler with melamine resin foam is additionally placed on the fire extinguisher nozzle at a radial distance of about 10 mm (see Figure 4 below). The oblique area marked between the two frequency spectra S2 and S3 shows the high noise reduction effect of the melamine resin foam muffler layer with selectable sound frequency in the high frequency range, which is significantly increased above 250 Hz. Depending on the thickness of the melamine resin foam used, from about 2500 Hz to over 4000 Hz, more than 95% of the sound energy of the fire extinguishing agent impacting on the sound-absorbing layer is absorbed. In the present invention, a muffler fire extinguisher nozzle with a very narrow outlet and a muffler with an open and porous muffler layer matched with a frequency spectrum are combined to produce a uniform distribution of the emission spectrum and reach a low noise level that is difficult to achieve. Only 80 decibels.

Fig. 4 shows the first embodiment of the nozzle device 1 of the tubular silencer fire extinguisher according to the present invention.

Compared with the first figure, the fire extinguisher nozzle 11 shown in dashed lines is currently surrounded by a cylindrical and tubular muffler 2, and the two maintain a minimum radial distance RA, which is 5 to 10 mm in the example shown. Due to the remaining intermediate layer ZS, the fire extinguishing agent radially sprayed from the outlet 12 can pass through the intermediate layer ZS, and further flow to the outflow of the axial end of the fire extinguisher nozzle 11 in the axial direction with a small flow resistance. Spouting from the mouth. The ratio of the internal cross-section Q2 of the muffler to the cross-section Q1 of the fire extinguishing pipe is preferably between 2 and 10, so that the middle layer ZS is large enough for the fire extinguishing agent to cross outwards with low resistance. The symbol IS here represents the inner diameter of the silencing layer 22. The other axial end of the muffler 2 on the connecting block 10 is then restricted by, for example, an orifice 23. Its function is to fix the entire muffler 2 on the connecting block 10.

The muffler 2 shown is surrounded by a hard plastic jacket 21 to mechanically protect the inner muffler layer 22 in the radial direction. The thickness M of the jacket is between 1 and 2 mm, and the radial thickness RD of the sound-absorbing layer 22 is between about 10 and 15 mm. AS represents the outer diameter, and SL represents the axial length of the entire muffler 2.

In addition, according to the present invention, the muffler 2 extends beyond the end of the fire extinguishing pipe with a protruding length UB ranging from 10 to 20 cm, and forms a sound-absorbing chamber AB, which advantageously further reduces noise. The protruding length UB is defined by the outflow opening 12 The axial end and the impact position of the fire extinguishing agent jet on the radial inner side of the muffler layer 22 are measured toward the axial end of the muffler 2.

Fig. 5 shows a view of the outlet OF as seen along the line of sight V of the noise-absorbing fire extinguisher nozzle device 1 in Fig. 4. In this figure, the structure of the tubular muffler 2 and the ratio of the two sections Q1 and Q2 are particularly clearly seen. In the example shown, the ratio of Q2 to Q1 is approximately 3.3, which is sufficient to provide the fire extinguishing agent to be sprayed with low flow resistance through the radial intermediate layer ZS designed in this size.

Fig. 6 shows the second embodiment of the nozzle device 1 of the tubular sound-absorbing fire extinguisher according to the present invention, which has a plurality of slot-shaped outlets 12. These outlets can be arranged in the peripheral direction of the nozzle 11 of the fire extinguisher, that is, for example, the two jets of fire extinguishing agent are sideways and keep a distance from each other, and the third jet of fire extinguishing agent is sprayed downward from the outlets 12. The EIN supplement represents the inlet of the fire extinguisher nozzle 11, 15 is a flange or pipe neck, through which the fire extinguisher nozzle 11 can be fixed to the connecting block 10 by a nut 14.

Fig. 7 shows a third embodiment of the nozzle device 1 of the tubular sound-absorbing fire extinguisher according to the present invention. The opening is preferably 0.5mm in diameter. It is further preferred to be arranged on a straight line at a distance of 5 mm before and after. According to the present invention, the arrangement of the fire extinguishing agent is basically the same as a continuous opening.

The multiple tiny openings 16 have the advantage of mechanical stability of the fire extinguisher nozzle 11 and the advantage of a simple modification, wherein the opening 16 can be realized as a drill hole.

Fig. 8 shows the fourth embodiment of the nozzle device 1 of the tubular sound-absorbing fire extinguisher according to the present invention. The sprayed fire extinguishing agent can, for example, The direction is changed to face another silencing layer on the ceiling D to further reduce noise.

Fig. 9 shows the fifth embodiment of the nozzle device 1 of the tubular silencer fire extinguisher according to the present invention, which has a funnel TR for leading out the fire extinguishing agent.

Fig. 10 shows the sixth embodiment of the nozzle device 1 of the tubular silencer fire extinguisher of the present invention, which has a bulbous muffler 2 of the present invention.

Figure 11 is a longitudinal cross-sectional view of an alternative embodiment of the tubular fire extinguisher nozzle 11, showing that the conventional fire extinguisher nozzle 11 having an arc-shaped outlet 12 is cut through. The illustrated fire extinguisher nozzle 11 consists of at least one pipe section 17 which extends in particular in a cylindrical shape. The conical closed portion 18 of the fire extinguisher nozzle 11 is connected to the pipe section. The arc-shaped outlet opening 12 is located at the closed cone 18. The arrow SA once again shows the spreading direction of the fire extinguishing agent jet sprayed from the slot-shaped, completely arc-shaped outlet 12. In the fire extinguisher nozzle 11, the axially opposite one is an internal thread (not shown), and the fire extinguisher nozzle 11 can be screwed to a corresponding external thread of the pipe end 3 protruding from the ceiling D via this internal thread. When extinguishing a fire, the fire extinguishing agent is supplied to the fire extinguisher nozzle 11 via the pipe end 3.

In the next figure 12, you can see the spread of the sprayed extinguishing agent in detail. Fig. 12 shows a top view of the outlet 12 as seen from line XII in Fig. 11.

In this example, the outlet opening 12 also has a geometry, and the opening at least perpendicular to the diffusion direction is 3 mm at most. In this case, the gap width of the outlet 12 is 0.5mm to 1mm. Through the outlet 12 of such a shape, the fire extinguishing agent is sprayed from the nozzle in the form of a cone-shaped jet. However The cone jet is different from a completely filled borehole, but the fire extinguishing agent is only sprayed out as a flat cone sleeve. This ensures that the noise level is reduced.

Figure 13 shows a top view of the fire extinguisher nozzle 11, which has a plurality of tiny openings 16 along a circular arc.

Figure 13 shows another design of the outlet 12 of the nozzle 11 of the fire extinguisher. The outflow port 12 is still discontinuous, but has a plurality of small openings 16 that collectively produce an outflow port 12. The outlet 12 is also arranged on a circular arc of the tapered end 18 of the nozzle 11 of the fire extinguisher.

Figure 14 shows the first embodiment of the noise-absorbing fire extinguisher nozzle device 1 of the present invention having such a fire extinguisher nozzle 11.

Compared with Fig. 11, the current fire extinguisher nozzle 11 shown by the dotted line is surrounded by a cylindrical and tubular muffler 2, and the two maintain a minimum distance MA, which is in the range of, for example, 10 to 20 mm. Mainly, the muffler 2 has an axial minimum length, and the muffler is installed axially so that the sprayed fire extinguishing agent completely impacts on the inner side of the muffler layer 22 within the minimum distance MA in the spray diffusion direction SA. The symbol IS represents the inner diameter of the silencing layer 22. The measurement is that the muffler 2 can cover the cylindrical pipe section 17 of the fire extinguisher nozzle 11. The inner side of the sound-absorbing layer 22 does not need to be flush with the radial outer side of the cylindrical pipe section 17. The radial inner side can also keep a distance, for example, keep a radial distance of 20mm. Since the noise mainly originates from the sprayed fire extinguishing agent, in the axial area where the sound-absorbing layer 22 is then on the cylindrical pipe section 17, the sound-absorbing layer 22 can be replaced by another material, such as a silicon, rubber, or raw rubber (Kautschuk). The elastic layer 22' is replaced as a sleeve. At the end of the muffler 2 on the axially opposite side of the outlet OF, the muffler 2 is still restricted by the orifice 23. The function of the orifice plate 23 is to fix the entire muffler 2 to the tube End 3 or ceiling 4.

The muffler 2 shown is still surrounded by a hard plastic jacket 21 to protect the muffler layer 22 built in the radial direction. The thickness M of the jacket is between 1 and 2 mm, and the radial thickness RD of the sound-absorbing layer 22 is between about 10 and 15 mm. AS represents the outer diameter, and SL represents the axial length of the entire muffler 2.

In this embodiment, the muffler 2 has a protruding length UB, which is measured from the axial impact position of the extinguishing agent jet on the radial inner side of the muffler layer 22 to the axial end of the muffler 2 in the area of the outlet OF . In the present invention, the sound absorption area AB formed by the axial position so far provides further noise reduction. Therefore, the fire extinguishing agent that flows out in the direction of the arrow at the outlet OF can be sprayed out with a greatly reduced noise level there.

Figure 15 shows a second embodiment of a silencer fire extinguisher nozzle 11 with a T-shaped silencer 2. In this embodiment, the fire extinguishing agent enters the space environment through two outlets OF. More outlets OF can also be provided, for example, a cross-shaped muffler 2 (not shown) with two additional outlets OF on the paper plane of FIG. 15.

Figure 16 shows a third embodiment of the present invention with a spherical silencer 2. In this example, the fire extinguisher nozzle 11 is completely enclosed up to the radially diagonally opposite ceiling D and the outflow port OF left in the muffler 2. The fire extinguishing agent sprayed from this place can, for example, impinge on another sound-absorbing layer provided on the ceiling D to further reduce noise.

1‧‧‧Fire extinguishing facilities, gas fire extinguishing facilities

2‧‧‧Muffler, frequency selective silencer

10‧‧‧Connecting block, T-piece

21‧‧‧Jacket, pipe sleeve

22‧‧‧Muffler layer, melamine resin foam, foam material

23‧‧‧Orifice plate

A‧‧‧Diffuser shaft, fire pipe shaft

AB‧‧‧Sound absorption room

AS‧‧‧Outer diameter of silencer

D‧‧‧Ceiling

IS‧‧‧Inner diameter of silencer

M‧‧‧Sleeve thickness, pipe sleeve thickness

MA‧‧‧Minimum distance

OF‧‧‧Tube Outlet, Outlet

Q1‧‧‧Diffuser cross section

Q2‧‧‧Intermediate space cross section

RA‧‧‧Radial distance

RD‧‧‧Radial diameter

SL‧‧‧Muffler length

UB‧‧‧Protrusion length

ZS‧‧‧Intermediate space

Claims (22)

A muffler fire extinguisher nozzle device, used in fire-fighting facilities of buildings, has at least one fire extinguisher nozzle (11) for the fire extinguishing agent to flow out, and a muffler (2) for each fire extinguisher nozzle (11), wherein each fire extinguisher nozzle (11) It has at least one outlet (12), the geometric shape of which has a gap width of at least one perpendicular to the diffusion direction up to 1mm, and each muffler (2) has a frequency selective muffler layer (22), which is arranged in such a way that The fire extinguishing agent jets ejected from each outlet (12) impinge on the sound-absorbing layer (22) in the diffusion direction (SA), and the sound-absorbing layer (22) has a sound absorption rate (α) that rises from the sound frequency (f) above 125 Hz ), where the fire extinguisher nozzle (11) is designed as a diffuser or a cylindrical cone nozzle, and each muffler (2) is a muffler tube with a muffler layer (22) on the inner side, and the muffler tube (2) The measurement method is that the sound-absorbing layer (22) completely surrounds each outlet (12) of the fire extinguisher nozzle (11), and each outlet (12) has a minimum distance (MA) from the opposite sound-absorbing layer (22), at 5mm To the range of 30mm, and the muffler tube (2) has an axially protruding tube, the measurement method is from the outer end of each outlet (12) to the tube outlet (OF), this tube has The sound absorption chamber (AB) has an axial protruding length (UB) in the range of 5cm to 50cm. Such as the noise-absorbing fire extinguisher nozzle device of claim 1, wherein the sound absorption rate (α) of the sound-absorbing layer (22) increases from a maximum sound absorption rate of 0.1 from a frequency value of 125 Hz, and the sound absorption rate reaches at least 0.9 from a frequency value of 5000 Hz . Such as the noise-absorbing fire extinguisher nozzle device of claim 1, wherein the sound absorption rate (α) of the sound-absorbing layer (22) increases from the maximum sound absorption rate value of 0.1 from the frequency value of 125 Hz, and the sound absorption rate value reaches at least 0.9 from the frequency value of 1000 Hz . Such as the muffler fire extinguisher nozzle device of any one of claims 1 to 3, wherein each fire extinguisher nozzle (11) has at least one outlet (12), and its geometric shape at least one gap width perpendicular to the diffusion direction is 0.5 mm. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the muffler layer (22) is an open and porous foam or mineral fiber layer. The noise-absorbing fire extinguisher nozzle device of claim 1, wherein the noise-absorbing layer (22) is a melamine resin foam. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the muffler layer (22) has a thickness in the range of 5mm to 50mm. Such as the noise-absorbing fire extinguisher nozzle device of claim 1, wherein the layer thickness of the noise-absorbing layer (22) is in the range of 10mm to 30mm. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the muffler (2) matches the fire extinguisher nozzle (11) with each outlet (12) in the muffler parameter to maximize the noise level (L _pk ) during the fire extinguishing process The level value (M3) is 85 decibels. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the muffler (2) matches the fire extinguisher nozzle (11) with each outlet (12) in the muffler parameter to maximize the noise level (L _pk ) during the fire extinguishing process The level value (M3) does not exceed 80 decibels. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the fire extinguishing agent used for fire extinguishing is inert gas, carbon dioxide, or chemical fire extinguishing agent. Such as the muffler fire extinguisher nozzle device of claim 11, wherein the inert gas is nitrogen or argon, and the chemical fire extinguishing agent is Hailong, HFC227, or Novec1230. Such as the muffler fire extinguisher nozzle device of claim 1, wherein each outlet (12) is designed in the fire extinguisher nozzle (11) so that the sprayed fire extinguishing agent has a flat jet shape. Such as the muffler fire extinguisher nozzle device of claim 1, wherein each outlet (12) has a slit-shaped or slot-shaped geometry. Such as the muffler fire extinguisher nozzle device of claim 1, wherein each outlet (12) extends along a straight line or along an arc. Such as the muffler fire extinguisher nozzle device of claim 1, wherein each outlet (12) extends along a circular arc line. Such as the muffler fire extinguisher nozzle device of claim 1, wherein each outlet (12) has a plurality of arranged openings or boreholes along a straight line, and its overall effect on the sprayed fire extinguishing agent is like the same continuous opening. Such as the muffler fire extinguisher nozzle device of claim 17, wherein the opening or bore has a diameter of 0.5 mm at the maximum. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the minimum distance (MA) is in the range of 10mm to 20mm. Such as the muffler fire extinguisher nozzle device of claim 1, wherein the axial protrusion length (UB) is in the range of 10 cm to 20 cm. An application of a frequency-selective sound-absorbing material (22) for installation on a fire extinguisher nozzle (11) of an inert gas fire-fighting facility in a building to reduce the noise level (L _pk ) during the fire extinguishing process. Among them, the fire extinguisher nozzle (11) ) Has at least one outlet (12) whose geometric shape is at least one perpendicular to the diffusion direction and the gap width is at most 1mm, so that the vortex appearing in the sprayed fire extinguishing agent jet basically emits high-frequency sound above 125Hz Rotation frequency, and the muffler (2) is set so that the fire extinguishing agent jet from each outlet (12) impinges on the sound-absorbing layer (22) in the spreading direction (SA) and within a minimum distance (MA), and , The sound absorption rate (α) of the muffler layer (22) rises from the sound frequency (f) 125Hz, where the fire extinguisher nozzle (11) is designed as a diffuser or a cylindrical cone nozzle, and each muffler (2) is A muffler tube with a muffler layer (22) on its inner side, and the muffler tube (2) is measured in such a way that the muffler layer (22) completely surrounds each outlet (12) of the fire extinguisher nozzle (11), and each outflow There is a minimum distance (MA) between the mouth (12) and the opposing sound-absorbing layer (22), which is in the range of 5mm to 30mm, and the sound-absorbing tube (2) has an axially protruding pipe fitting. The measurement method is as follows: The outer end of the orifice (12) to the outflow orifice (OF) of the tube, the tube has a sound absorption chamber (AB), and its axial protruding length (UB) is in the range of 5 cm to 50 cm. Such as the application of the frequency selective noise-absorbing material (22) of claim 21, wherein the outlet (12) has a geometric shape of at least one vertical to the diffusion direction with a gap width of at most 0.5 mm.

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