WO2008059984A1

WO2008059984A1 - Collective mist nozzle and fire extinguishing facility equipped with that mist nozzle

Info

Publication number: WO2008059984A1
Application number: PCT/JP2007/072410
Authority: WO
Inventors: Akimi Serizawa; Eiichi Murai; Toshihiko Eguchi
Original assignee: Hatsuta Seisakusho Co., Ltd.; Aura Tec Co., Ltd.
Priority date: 2006-11-17
Filing date: 2007-11-19
Publication date: 2008-05-22

Abstract

One collective mist nozzle (100) which comprises an orifice plate (1) having a plurality of orifices for ejecting liquid, a control plate (2) arranged to allow a recess constituting a swirl chamber communicating with each orifice, a groove constituting a channel entering the recess toward almost the swirling direction of the liquid, and a second inlet for introducing the liquid to the groove to communicate with respective orifices, a channel plate (3) arranged to communicate with the second inlet and having an opening working as the supply path of the liquid, and a lid (4) having a first inlet for introducing the liquid to the opening, and which is constituted by stacking these four kinds of planar bodies. With such an arrangement, the mist nozzle can deal with complicated mist injection conditions and can be installed in a limited space. The mist nozzle is especially effective as a fire extinguishing facility.

Description

Specification

Collective mist noznore and fire extinguishing equipment equipped with the mist noznore

Technical field

The present invention relates to a collective mist nozzle provided with a plurality of orifices, and a fire extinguishing equipment including the mist nozzle.

Background art

As shown in FIG. 8, a conventional mist nozzle generally includes an orifice member 22 that is fitted into a nozzle head 21 and a control member 23 that is fitted into the nozzle member 21. The orifice member 22 has power with the swirl chamber 22b and the flow path 22c leading to the old reface 22a, and the control member 23 has a swirl groove 23a positioned between the swirl chamber 22b and the flow path 22c.

[0003] The liquid enters the flow path 22c from the periphery of the control member 23 according to the direction of the arrow, is given a swirl force by the swirl groove 23a, and turns into a swirl flow in the swirl chamber 22b. Become jetted.

[0004] However, in the conventional mist nozzle, the orifice member 22 having the swirl chamber 22b and the control member 23 having the swirl groove 23a are complicated in structure as described above, and thus must be manufactured by cutting. Since it cannot be obtained, the nozzle manufacturing cost increases. In addition, for example, when used in fire fighting activities, when changing the atomization performance to accommodate different fire extinguishing targets, new ones with different dimensions and shapes must be cut. Therefore, in order to reduce the manufacturing cost, there is a problem that it is extremely difficult to increase the variation of the dimension 'shape'.

[0005] Also, especially when trying to use mist nozzles for fire extinguishing, conventional mist nozzles had to be jetted near a flame where the reach was not sufficient, and there was a great danger during fire fighting activities. It was.

[0006] In addition, even if it is desired to use a conventional mist nozzle to provide a plurality of orifices, the force to install a plurality of mist nozzles or processing to provide a plurality of orifices in the mist nozzle I had to. For this reason, it was difficult to manufacture a mist nozzle having a plurality of orifices corresponding to complicated mist injection conditions in a narrow installation space. Disclosure of the invention

Problems to be solved by the invention

[0007] The present invention contributes to the improvement of the injection performance of a mist nozzle and the further improvement of the fire-extinguishing effect against a flame when the mist nozzle is applied to extinguishment by solving the technical problems described above. is there.

Means for solving the problem

[0008] One collective mist nozzle of the present invention includes an orifice plate having a plurality of orifices for injecting liquid, a recess constituting a swirl chamber communicating with each orifice, and the recess described above. A control plate in which a groove constituting a flow path for the liquid to flow in a substantially swirling direction and a second introduction port for guiding the liquid to the groove are communicated with each of the aforementioned orifices; A flow path plate having an opening serving as a liquid supply path disposed in communication with the introduction port, and a lid plate having a first introduction port for introducing the liquid into the opening. It is composed of four types of plate-like bodies.

[0009] According to this collective mist nozzle, the orifice plate, the control plate, the flow path plate, and the cover plate force S described above can be easily manufactured individually by etching, laser processing, or punching. Manufacture of the entire nozzle is extremely simple, and costs can be reduced. Further, for example, since the atomization performance can be easily changed by simply changing the number and shape of the control plate and the flow path plate, a mist nozzle that meets the required injection conditions can be easily and inexpensively handled.

[0010] Further, another collective mist nozzle of the present invention includes an orifice plate having a plurality of orifices for injecting a liquid, a recess constituting a swirl chamber communicating with each orifice, and the recess A control plate in which a groove constituting a flow path for the liquid to flow in the substantially swirling direction and a second introduction port for guiding the liquid to the groove are arranged to communicate with each of the orifices; A lid plate arranged to communicate with the second introduction port and having a first introduction port for introducing a liquid into the second introduction port, and superimposing these three types of plate-like bodies It is composed!

[0011] According to this collective mist nozzle, the above-mentioned orifice plate, control plate, and lid plate are individually provided. In addition, since it can be easily manufactured by etching, laser processing, or punching, the manufacture of the mist nozzle as a whole becomes extremely simple and the cost can be reduced. In addition, for example, the atomization performance can be easily changed simply by changing the number and shape of the control plates, so that a mist nozzle that meets the required injection conditions can be easily and inexpensively handled. Further, since the number of parts is reduced as compared with the above-described invention, the cost can be further reduced.

[0012] Further, another collective mist nozzle of the present invention includes an orifice plate having a plurality of orifices for injecting liquid, a recess that forms a swirl chamber that communicates with each orifice, and the recess And a control plate arranged to communicate with each of the aforementioned orifices a groove that forms a flow path for the liquid to flow in the substantially swirling direction, and a second introduction port that guides the liquid to the groove. It is composed of these two types of plate-like bodies.

[0013] According to this collective mist nozzle, the above-mentioned orifice plate and control plate can be easily manufactured individually by etching, laser processing, or punching processing, and therefore, the manufacture of the mist nozzle as a whole is extremely difficult. Simplify and reduce costs. Further, since the number of parts is reduced as compared with the above-described invention, the cost can be further reduced. Further, if this collective mist nozzle configuration is adopted, it is possible to inject mist only by providing this configuration on a part of the wall surface of the tubular body filled with liquid. In other words, the freedom of arrangement of the mist nozzle is increased.

[0014] In addition, another collective mist nozzle of the present invention includes a plurality of orifices for injecting liquid, a recess constituting a swirl chamber communicating with each orifice, and the recess described above. A control plate in which a groove that forms a flow path for the liquid to flow in a substantially swirling direction and a second introduction port that guides the liquid to the groove are communicated with each of the orifices, and each of the control plates. The orifice, the recess, and the cover plate that closes the groove are formed by superimposing these two types of plates!

[0015] According to this collective mist nozzle, the above-mentioned control plate can be easily manufactured individually by etching, laser heating or punching, and further, an orifice portion, a swirl chamber (recessed portion), and a flow path ( Since the difficulty of alignment with the groove) is eliminated, the manufacture of the entire mist nozzle becomes extremely simple and the cost can be reduced. Compared to the above invention, Since the number of products is reduced, the cost can be further reduced.

In the present invention, the “substantially swiveling direction” preferably means a direction in which the inflowing liquid gives a swirling force to the liquid in the swirling chamber or maintains the swirling force of the liquid.

The invention's effect

[0017] According to one collective mist nozzle of the present invention, the orifice plate and control plate constituting the collective nozzle, the flow channel plate and optionally the cover plate as desired are individually etched or lasered. It can be easily manufactured by machining or punching. Therefore, the manufacture of the mist nozzle as a whole becomes extremely simple and the cost can be reduced. Further, for example, since the atomization performance can be easily changed simply by changing the number and shape of the control plate and the flow passage plate, a mist nozzle that meets the required injection conditions can be easily and inexpensively handled.

Brief Description of Drawings

FIG. 1 is an exploded perspective view of one collective mist nozzle in the present embodiment.

FIG. 2 is a partial vertical cross-sectional view configured by superposing the respective plates of FIG.

[Fig. 3A] Plan view of the single mist nozzle that is part of Fig. 2 and viewed from the P direction (right direction)

FIG. 3B is a plan view showing a control plate 2 of the collective mist nozzle in the present embodiment.

FIG. 3C is a partially enlarged view of FIG. 3B.

FIG. 4A is an overall overview diagram of a mist injection device provided with a collective mist nozzle in the present embodiment.

FIG. 4B is an enlarged view of part (B region) of FIG. 4A.

FIG. 4C is a CC cross-sectional view of FIG. 4A.

FIG. 5A is an overall overview diagram of a mist injection device provided with another collective mist nozzle in the present embodiment.

FIG. 5B is an enlarged view of a part (X region) of FIG. 5A.

FIG. 5C is a sectional view taken along the line Y—Y in FIG. 5A.

FIG. 5D is an enlarged view of a part (Z region) of FIG. 5C.

FIG. 5E is a view corresponding to FIG. 5D of the mist injection device provided with another collective mist nozzle in the present embodiment. FIG. 6 is a view corresponding to FIG. 2 of a mist injection apparatus provided with another collective mist nozzle in the present embodiment.

FIG. 7 is an overall overview of one fire extinguishing facility in the present embodiment.

FIG. 8 is a longitudinal side view showing a conventional mist nozzle.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this description, common parts are denoted by common reference symbols throughout the drawings unless otherwise specified. In the drawings, the elements of this embodiment are not necessarily shown to scale. In addition, some symbols may be omitted to make each drawing easier to see.

[0020] One collective mist nozzle of the present embodiment is configured by superposing an orifice plate having a plurality of orifices, a control plate, a flow channel plate as desired, and a lid plate as desired. It is possible to cope with various injection conditions by an easy and inexpensive method. Further, one collective mist nozzle of this embodiment can be installed in a narrow space. In addition, the collective mist nozzle or a tubular body provided with the collective mist nozzle in a part of the tube wall is also suitable as a fire extinguishing equipment. The following embodiments are more specific descriptions of such contents.

FIG. 1 is an exploded perspective view of the collective mist nozzle 100 of the present embodiment, and shows four types of plate-like bodies, that is, an orifice plate 1, a control plate 2, a flow channel plate 3, and a lid plate 4. Fig. 2 is a partial vertical cross-sectional view constructed by stacking the plates in Fig. 1. Fig. 3A is a plan view taken from the P direction (right direction) of a single mist nozzle that is part of Fig. 2. FIG. FIG. 3B is a plan view showing the control plate 2 of the collective mist nozzle 100 in the present embodiment, and FIG. 3C is a partially enlarged view of FIG. 3B.

In the present embodiment, the orifice plate 1 has 90 orifices la for ejecting liquid. The control plate 2 includes a recess 2a that forms a swirl chamber that communicates with the orifice la, and a groove that forms a flow path for the liquid to flow in the substantially swirl direction with respect to the recess (swirl chamber) 2a. 2b and the second introduction port 2c to the groove (flow path) 2b are arranged so as to communicate with each orifice la. The control plate 2 is formed as an integral body in this embodiment. ing. In addition, the flow path plate 3 has an opening 3a that is disposed so as to communicate with the second introduction port 2c and serves as a liquid supply path. The lid plate 4 has a first introduction port 4a for introducing a liquid into the opening 3a. In this embodiment, the material of the orifice plate 1, the control plate 2, the flow path plate 3, and the cover plate 4 is SUS304.

Here, as shown in FIGS. 3B and 3C, a plurality of swirl chambers (recesses) 2a, 2a, 2a, flow paths (grooves) 2b, 2b, 2b formed in the control plate 2 Of the second inlets 2c,..., 2c, one second inlet 2c is shared by a maximum of three adjacent channels 2b, 2b, 2b. Further, in this embodiment, the line connecting the center of one swirl chamber 2a and the centers of two swirl chambers 2a, 2a adjacent to the swirl chamber 2a is arranged to form an equilateral triangle. . In the present embodiment, the inner diameters of the swirl chambers 2a,..., 2a and the second introduction ports 2c,. In FIG. 3C, for convenience, a line connecting the center of one swirl chamber 2a and the centers of two swirl chambers 2a, 2a adjacent to the swirl chamber 2a is shown to form an equilateral triangle. Auxiliary line A is drawn.

[0024] The mist nozzle unit (2a, 2b, 2c) described above is configured such that the groove 2b serving as three flow paths from three directions faces the recess 2a serving as the swirl chamber as shown in FIG. 3A. Therefore, a uniform turning force is obtained and stabilized in the turning chamber (recess 2a), so that the injection from the orifice la becomes uniform. In the present embodiment, the flow path cross-sectional area of the opening 3a is doubled by stacking two flow path plates 3! /.

The four types of plate-like bodies 1, 2, 3, 4 having the above-described structure can all be manufactured by etching or laser processing, so that they can be manufactured easily and inexpensively. In particular, it greatly contributes to the reduction of initial costs during manufacturing. In addition, since the shape and / or dimensions of the mist nozzle unit (2a, 2b, 2c) can be finely changed, it is possible to easily and inexpensively provide different mist states to be injected.

Here, as shown in FIG. 2, the flow of liquid when the collective mist nozzle 100 is configured as a single flat plate will be described below. The liquid entering the first inlet 4a of the cover plate 4 shown in FIG. 1 passes through the second inlet 2c of the control plate 2 via the opening 3a of the flow path plate 3, and then passes through the groove 2b. A swirl force is applied to create a swirl flow in the recess 2a. Thereafter, droplets are ejected from the orifice la of the orifice plate 1 as fine particles. Therefore, this is narrow When installed at a pace, 90 mist nozzles can be installed only in a flat plate-shaped space.

[0027] When attention is paid to the mist nodule simple substance (2a, 2b, 2c) shown in FIG. 2 and FIGS. 3A to 3C, the liquid similarly enters from the three second introduction ports 2c, 2c, 2c, and each groove 2b , 2b, and 2b are each given a turning force and fed into the recess 2a, so that the liquid becomes a swirling flow in the recess 2a. Therefore, in the case of 90 mist nozzles alone (2a, 2b, 2c), the liquid in the recesses 2a,..., 2a becomes a swirling flow. Will be injected.

In the present embodiment, as shown in FIG. 1, since the mist nozzle group is divided into upper and lower regions, the liquid flow is also divided into upper and lower portions. Accordingly, the forces of the first introduction ports 4a above and below the cover plate 4 are also divided and the liquid flows into the flow path plate 3 and the like, so that an equal injection pressure can be obtained in each region above and below the collective mist nozzle 100.

[0029] The apparatus shown in FIGS. 4A to 4C is a mist injection apparatus 200 provided with the collective mist nozzle of the present embodiment. Here, FIG. 4A is an overall overview of the mist injection device 200 provided with the collective mist nozzle. FIG. 4B is an enlarged view of part (B region) of FIG. 4A. FIG. 4C is a CC cross-sectional view of FIG. 4A. In the present embodiment, the second liquid introduction port 5c, the groove 5b serving as a flow path, the recess 5a serving as a swirl chamber, and the orifice 5d are formed from a single plate-like body 5 by a known etching technique. In addition, the material of the plate-like body 5 of the present embodiment is SU S304. Here, as in the first embodiment, the plate-like body 5 is a plate-like body in which the orifice 5d is formed, and another plate-like shape in which the second introduction port 2c, the groove portion 5b, and the concave portion 5a are formed. Even if the body is bonded or bonded.

As shown in FIGS. 4A to 4C, in this embodiment, the plate-like body 5 in which the mist nozzles (5a, 5b, 5c, 5d) arranged in a line are formed has an orifice 5d outside the pipe. By bending and joining so as to form a tubular body having a substantially rectangular cross section. The lid plate 7 is joined to the plate-like body 5 so as to close each of the single mist nozzles (5a, 5b, 5c, 5d) while leaving a part of the second introduction port 5c. With this structure, as in the first embodiment, the liquid inside the pipe 6 is fed from the second opening 5c through the groove 5b into the recess 5a serving as a swirl chamber. After turning, the mist is injected from the orifice 5d. In addition, when the cleanliness of the liquid is low, the orifice 5d may be clogged with foreign matter, so that a wire mesh strainer 10 is appropriately disposed inside the pipe.

[0031] The apparatus shown in FIGS. 5A to 5D is a mist spraying apparatus 300 including the collective mist nozzle of the present embodiment. Here, FIG. 5A is an overall overview of the mist injection apparatus 300 provided with the collective mist nozzle. FIG. 5B is an enlarged view of a part (X region) of FIG. 5A. FIG. 5C is a cross-sectional view taken along the line YY of FIG. 5A. 5D is an enlarged view of a part (Z region) of FIG. 5C.

As shown in FIGS. 5A to 5D, in the present embodiment, the orifice plate 8 in which the orifice la is formed, the liquid second introduction port 2c, the groove 2b serving as the flow path, and the swirl chamber are formed. A single mist nozzle is formed by the control plate 9 having the recess 2a and the lid plate 7. The orifice plate 8, the control plate 9, and the lid plate 7 are stacked and bonded or joined as in the first embodiment. Note that the orifice la, the second inlet 2c, the groove 2b, and the recess 2a are formed by a known etching technique or laser processing, as in the first embodiment. Further, the material of each plate in the present embodiment is the same as that in the first embodiment.

[0033] In this embodiment, as shown in FIG. 5C, plate-like body forces aligned in the mist nozzle (2a, 2b, 2c) force train, the orifice la is bent and joined so as to be outside the pipe. Thus, the cross section is formed into a substantially regular hexagonal tubular body. As shown in FIG. 5C, each group of mist nozzle groups is arranged on four surfaces of a tubular body having a substantially regular hexagonal cross section. Further, the cover plate 7 is joined to the control plate 9 so as to close each of the single mist nozzles (2a, 2b, 2c) while leaving a part of the second introduction port 2c. With this structure, as in the first embodiment, the liquid in the pipe interior 11 is sent from the second opening 2c via the groove 2b to the recess 2a serving as the swirl chamber and swirled, and then as mist. Injected from orifice la. In addition, when the cleanliness of the liquid is low, the orifice 5d may be clogged with foreign matter, so that a wire mesh strainer 10 is appropriately disposed inside the pipe.

[0034] As in the second and third embodiments, if the tubular body is formed by bending and joining the plate-like body so that the orifice is located outside the pipe, the preferred direction of the entire outer peripheral surface thereof A mist injection device having a collective mist nozzle that can freely inject (within 360 degrees) is obtained. In addition to the above-described embodiment, if the plate-like body is configured to be curved, a collective mist nozzle that can freely inject in a desired angle direction (within 180 degrees) of the semicircular outer peripheral surface is provided. A mist injection device is also obtained. At this time, the mist injection device described above can be manufactured in a pipe shape or a semicircular shape by various known methods.

Incidentally, instead of the mist nozzle of the third embodiment, a configuration in which the cover plate 7 is removed as shown in FIG. 5E may be employed. When a tubular body (pipe) is formed, the inside of the pipe (for example, 11 in the third embodiment) becomes a liquid flow path, so the configuration of the mist nozzle (2a, 2b, 2c) as shown in FIG. 5E If so, the lid plate 7 is not particularly required. In other words, the control plate 9 is formed so as to function as the lid plate 7.

On the other hand, when it is necessary to join the cover plate on the control plate for the purpose of increasing mechanical strength, as shown in FIG. 6, the first introduction port 7a of the cover plate 7 (first embodiment) 4a) and the second introduction port 2c of the control plate 9 are arranged so as to communicate with each other. In other words, even the integrated mist nozzle in which the flow path plate 3 is removed from the collective mist nozzle 100 of the first embodiment, if arranged in accordance with the above-described contents, at least one of the effects of the present invention. Part can be exhibited.

FIG. 7 is an overall overview diagram of the fire extinguishing equipment 400 including the collective mist nozzle of the present embodiment. In the fire extinguishing equipment 400 of this embodiment, a pipe is connected to the first inlet 4a in the cover plate 4 of the collective mist nozzle 100 of the first embodiment, and further, the pressurizing pump 31 and a liquid as a fire extinguishing agent (for example, , Water) source 30 is connected. With this configuration, when a fire breaks out, the extinguishing agent is sent to the collective mist nozzle 100 by the pressurizing pump 31, and then the extinguishing agent is injected as mist to the flame 40 as shown in FIG. .

[0038] When the mist was injected using the fire extinguishing equipment 400 of the present embodiment, the extinguishing agent (water) was compared with the case of mist injection with a mist nozzle alone or non-misted liquid injection. ), The reach is about twice or longer. More specifically, when the fire extinguishing equipment 400 of the present embodiment is used, when the liquid pressure is 0.9 MPa, the reach distance reaches 15 m. The spray amount was 12L / min. It was also confirmed that the amount of liquid was very small compared to the injection of liquid that was not a liquid force strike.

[0039] Further, when the fire extinguishing was performed by the fire extinguishing equipment 400 of the present embodiment, the dispersion state of the mist was confirmed at a position about 10 m away from the orifice plate 1, and the injected mist was about 30 Omm in diameter. It was found that it was within the circular area. Therefore, it can be seen that the fire extinguishing equipment 400 of the present embodiment is a safe and useful fire extinguishing equipment because it can be sent far away while maintaining such an appropriate mist density. Also, such mist is very efficient because it can cover the surface of the fire extinguisher sufficiently to extinguish the fire. In addition, since the mist formed by the fire extinguishing equipment 400 of the present embodiment can significantly reduce the impact force on the object as compared to the spray of liquid that is not mist, damage to the object after fire extinguishing is possible. Can be prevented.

[0040] As described above, it was confirmed that if the fire extinguishing equipment 400 of the present embodiment is used, the position force sufficiently away from the flame can sufficiently contribute to the fire extinguishing activity even if mist is injected. In this embodiment, the force using water as a fire extinguisher is not limited to this. For example, an alkaline or neutral reinforcing liquid or a fire extinguishing agent with a surfactant may be used. However, it is preferable to use water from the viewpoint of safety.

[0041] It should be noted that the above-described embodiment is the case where the force S that explains the configuration and effects when the fire is extinguished using the collective mist nozzle 100, and the collective mist nozzle or mist injection device of other embodiments is used. Even so, the reach of the mist is longer than before. Further, the collective mist nozzle or the mist injection device of the embodiment other than the collective mist nozzle 100 described above can inject mist having an appropriate density.

[0042] By the way, in each of the above-described embodiments, a configuration in which three grooves 2b, 2b, 2b are used to flow into the swirl chamber from three directions as the shape of the mist nozzle unit (2a, 2b, 2c) is adopted. However, it is not limited to this. For example, the liquid may flow in from one direction using one groove 2b or from two directions using two grooves 2b and 2b. However, from the viewpoint of obtaining a uniform swirling force and avoiding an overly complicated structure, a configuration in which the flow into the swirl chamber from three directions is most preferable.

[0043] In each of the above-described embodiments, the force S indicates that two flow path plates 3 are overlapped and the flow path cross-sectional area of the opening 3a is doubled. More than that is fine. [0044] As in the second and third embodiments, the flow path plate 3 can be omitted if desired. The number of orifices la of the orifice plate 1 is not limited to 90 and can be set as appropriate.

[0045] Although the collective mist nozzle of this embodiment is based on a flat plate-like body, it can be formed into a tubular body by bending the plate-like body as described above, and the plate-like body can be curved. It is also possible to construct a semicircle. Therefore, mist can be jetted freely in a desired direction or atomization condition in correspondence with the shape of the installation target space (particularly a narrow space). In particular, a tubular body is particularly effective when used in a narrow space because it can also be used as a liquid feeding tube. In the third embodiment described above, the force S disposed on the four surfaces of the tubular body having a substantially regular hexagonal cross section is not limited to this. By providing the plurality of mist nozzles on at least one surface thereof, at least a part of the effect of the present invention is exhibited. As described above, modifications that exist within the scope of the present invention are also included in the scope of the patent claims.

[0046] It should be noted that this application was filed in 2004 under the application of the commissioned development project of the “Automatic Fire-Fighting Unit for Water Mist Kitchen”, Japan Science and Technology Agency, Article 19 of the Industrial Technology Strengthening Act. It is a thing.

Industrial applicability

[0047] The present invention can be widely used, for example, as a mist nozzle for fire fighting, agriculture, or air purification such as dust removal and deodorization. In particular, the present invention is extremely useful for fire extinguishing.

Claims

The scope of the claims

[1] an orifice plate having a plurality of orifices for injecting liquid;

A recess that constitutes a swirl chamber that communicates with each of the orifices, a groove that forms a flow path for the liquid to flow in the substantially swirl direction with respect to the recess, and a second introduction port that guides the liquid to the groove. A control plate arranged to communicate with each orifice;

A flow path plate having an opening which is disposed so as to communicate with the second introduction port and serves as a liquid supply path;

And a cover plate having a first inlet for introducing liquid into the opening, and the four types of plate-like bodies are overlapped.

Collective mist nozzle.

[2] an orifice plate having a plurality of orifices for injecting liquid;

A lid plate disposed to communicate with the second introduction port and having a first introduction port for introducing a liquid into the second introduction port;

The three types of plate-like bodies are stacked to form

Collective mist nozzle.

[3] an orifice plate having a plurality of orifices for injecting liquid;

A recess that constitutes a swirl chamber that communicates with each of the orifices, a groove that forms a flow path for the liquid to flow in the substantially swirl direction with respect to the recess, and a second introduction port that guides the liquid to the groove. And a control plate disposed so as to communicate with each of the orifices.

Collective mist nozzle.

[4] A plurality of orifices for injecting liquid, a recess that forms a swirl chamber that communicates with each of the orifices, a groove that forms a flow path for the liquid to flow in the swirl direction with respect to the recess, And a control plate disposed so that a second introduction port for guiding the liquid to the groove communicates with each of the orifices; Each of the orifices, the recess, and a cover plate that closes the groove, and is configured by overlapping the two types of plate-like bodies.

Collective mist nozzle.

[5] The mist from the orifice is made to flow by flowing a liquid into a tubular body provided with the collective mist nozzle according to any one of claims 1 to 4 at least a part of the tube wall so that the orifice faces the outside. Is configured to be injected

Mist injection device.

[6] The collective mist nozzle according to any one of claims 1 to 4 is provided so that the orifice faces the outside.

Fire extinguishing equipment.

[7] The mist from the orifice is made to flow by flowing the liquid into a tubular body having the collective mist nozzle according to any one of claims 1 to 4 provided at least at a part of the tube wall so that the orifice faces the outside. Equipped with a mist injection device configured to be injected

Fire extinguishing equipment.