JP6457046B2 - Ejection head with a sound deadening function for gas fire extinguishing equipment - Google Patents

Description

  The present invention relates to a jet head installed on a ceiling, a wall surface or the like in order to release a fire extinguishing agent gas to a fire extinguishing target section in a gas fire extinguishing facility using a fire extinguishing agent gas such as carbon dioxide, nitrogen, or a fluorine compound. The present invention relates to a jet head having a sound deadening function for a gas fire extinguishing equipment that can reduce noise generated when a fire extinguishing agent gas is released.

  In gas fire extinguishing equipment that uses extinguishing gas such as carbon dioxide, nitrogen, fluorine compound, etc., when the gas fire extinguishing equipment is activated at the time of fire extinguishing, it is within about 1 minute (in the case of fluorine compound fire extinguishing gas, 10 seconds) The extinguishing agent gas is released so that the extinguishing agent gas concentration in the fire extinguishing target section reaches the extinguishing concentration.

  At this time, the fire extinguisher gas is released from the jet head installed on the ceiling, wall surface, etc. in order to release the fire extinguisher gas to the fire extinguishing target section. The jet head for the gas fire extinguishing equipment is shown in FIG. The outlet 2 of the jet head 10A connected to the pipe 4 to which the extinguishing agent gas is supplied as shown in FIG. 5 is provided with an orifice 2, and the extinguishing agent gas is directly discharged from the orifice 2 to the fire extinguishing target section. As shown in FIG. 9 (b), an orifice 2 and a conical deflector (deflecting member) 5 are provided at the outlet of an ejection head 10 B connected to a pipe 4 to which a fire extinguishing agent gas is supplied. A fire extinguisher gas deflected by a deflector (deflecting member) 5 and discharged to a fire extinguishing target section, and an orifice (see FIG. 9C) at the outlet of the ejection head 10C as shown in FIG. Omission) and a cone-shaped horn (diffusion member) 6, and a fire extinguishing agent gas emitted from an orifice is diffused by the horn (diffusion member) 6 and released into the fire extinguishing target section. It has been.

  As described above, the conventional gas fire extinguishing equipment jet heads 10A, 10B, and 10C are configured so that the same amount of fire extinguishing agent gas is released from each of the jet heads that are usually installed in the fire extinguishing target section. In addition, the flow rate of the extinguishing agent gas discharged from the ejection head is limited by the orifice 2. For this reason, when the extinguishing agent gas is released from the ejection head, a high level of noise (specifically, , Noise of 120 db or more) is known to occur.

  By the way, since it is assumed that there is no person in the fire extinguishing target section when the gas fire extinguishing equipment is operated, it has been completely impossible to deal with noise generated when the fire extinguishing agent gas is discharged from the ejection head. It was not regarded as a problem and no measures were taken.

  However, when a gas fire extinguisher is activated, there is a problem when there is a person who is late in the fire extinguishing target section, and noise generated when fire extinguishing agent gas is released from the jet head has an adverse effect on the surrounding people. Based on the knowledge that there is a risk of such effects, we concluded that it is necessary to reduce the noise generated when fire extinguishing gas is released.

  The present invention is a gas system that can reduce noise generated when a fire extinguisher gas that has not been taken any measures and is not taken at all in the conventional jet head for gas fire extinguishing equipment is discharged. An object of the present invention is to provide a jet head having a sound deadening function for fire extinguishing equipment.

In order to achieve the above object, a jet head having a sound extinguishing function for a gas fire extinguishing facility according to the present invention is installed to discharge a fire extinguishing agent gas to a fire extinguishing target section in a gas fire extinguishing facility using a fire extinguishing agent gas. An ejection head having a silencing means, wherein the silencing means has an opening area smaller than the opening area of the pipe provided in the ejection head connected to the piping to which the extinguishing agent gas is screwed. And a material that eliminates the turbulence of the metal porous air flow composed of a three-dimensional network structure through which the extinguishing agent gas disposed at the outlet of the orifice can flow, the turbulence of the metal porous air flow The material which eliminates is disposed in contact with the outlet of the orifice.
And the material that eliminates the turbulence of the metal porous air flow is a cylindrical first material disposed in contact with the outlet portion of the orifice, the outer peripheral surface of the first material, and the opposite side of the outlet portion of the orifice And a second material having a smaller pore diameter than the first material, the outer surface of the second material being exposed to the atmosphere and released to the atmosphere. Can do.
In addition, the material that eliminates the turbulence of the metal porous air flow includes a cylindrical first material disposed in contact with the outlet portion of the orifice, and a first material disposed in contact with the outer peripheral surface of the first material. It can be made of a second material whose pore diameter is smaller than that of the first material, and the outer surface of the second material is exposed to the atmosphere in a circumferential shape and opened.

  In this case, the silencer can be constituted by a silencer disposed in the ejection head.

  Further, the sound deadening means may be in the form of an orifice.

  Further, the silencer can be made of a fibrous or porous material through which a gas disposed at the outlet of the orifice can flow.

  And the hole diameter of the space | gap of a fibrous or porous material can be changed in the direction through which gas distribute | circulates, for example, the hole diameter of the space | gap of a fibrous or porous material can be made small in the direction through which gas distribute | circulates.

  According to the jet head having a silencing function for the gas fire extinguishing equipment of the present invention, in the gas fire extinguishing equipment using the fire extinguishing agent gas, the sound deadening means is provided in the jet head installed to discharge the fire extinguishing gas to the fire extinguishing target section When the fire extinguishing agent gas is released, the noise generated when the fire extinguishing agent gas is released can be reduced. It is possible to prevent panic from being caused by noise generated in the air, and it is difficult to hear broadcasts prompting evacuation.Furthermore, noise generated when fire extinguishing agent gas is discharged from the jet head is It is possible to prevent adverse effects.

  Further, by configuring the silencer with a silencer disposed in the ejection head, the silencer can be easily disposed, and the silencer can be adapted to the required degree of silence, installation conditions, etc. Therefore, the necessary silencing performance can be obtained with certainty.

  In addition, by using the silencer as the shape of the orifice, the silencer can have a simple structure, the ejection head can be configured compactly, and can be applied to existing equipment as it is.

  In addition, by configuring the silencing means with a fibrous or porous material through which gas disposed at the outlet of the orifice can flow, the silencing means can have a simple structure, and the ejection head can be configured compactly. It can be applied to facilities as it is.

  Then, by changing the pore diameter of the voids of the fibrous or porous material in the direction in which the gas flows, for example, by reducing the pore diameter of the voids of the fibrous or porous material in the direction in which the gas flows. A silencing effect can be obtained.

It is explanatory drawing which shows 1st Example of the ejection head which has a sound deadening function for the gas fire extinguishing facilities of this invention. It is explanatory drawing which shows 2nd Example of the injection head which has the sound deadening function for gas fire extinguishing equipment of this invention. It is explanatory drawing which shows 3rd Example of the ejection head which has a sound deadening function for gas type fire extinguishing facilities of this invention. It is explanatory drawing which shows the 1st modification of the 3rd Example of the injection head which has the sound-extinguishing function for gas type fire extinguishing facilities of this invention. It is explanatory drawing which shows the 2nd modification of the 3rd Example of the ejection head which has a sound deadening function for gas type fire extinguishing facilities of this invention. It is explanatory drawing which shows 4th Example of the ejection head which has a sound deadening function for the gas fire extinguishing facilities of this invention. It is explanatory drawing which shows 5th Example of the ejection head which has the sound deadening function for gas type fire extinguishing facilities of this invention. It is explanatory drawing which shows the deformation | transformation Example of the 5th Example of the ejection head which has a sound deadening function for gas type fire extinguishing facilities of this invention. It is explanatory drawing which shows the conventional injection head for gas type fire extinguishing equipment.

  Hereinafter, an embodiment of a jet head having a sound deadening function for a gas fire extinguishing facility of the present invention will be described based on the drawings.

FIG. 1 shows a first embodiment of an ejection head having a sound deadening function for a gas fire extinguishing equipment of the present invention.
The jet head 1A having a silencing function for the gas fire extinguishing equipment is provided with an orifice 2 in the jet head 1A connected to a pipe 4 to which a fire extinguishing agent gas is supplied, and a silencer 3A is disposed on the tip side thereof. The fire extinguishing agent gas is discharged to the fire extinguishing target section through the silencer 3A.

In the present embodiment, the silencer 3 </ b> A has a structure in which a large number of through holes 31 a are formed on the peripheral surface of the inner tube 31 that serves as a flow path for the extinguishing agent gas, and the outer periphery thereof is covered with the outer tube 32.
The silencer 3A is designed to reduce the noise generated when the extinguishing agent gas is released by weakening the shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifice 2 of the ejection head 1A is directly released into the atmosphere, the extinguishing agent gas rapidly expands, and noise is generated accordingly, but the ejection head 1A of the present embodiment. In the present invention, a large number of through holes 31a are formed on the peripheral surface of the inner pipe 31 serving as a flow path for the extinguishing agent gas, and the outer periphery thereof is covered with the outer pipe 32. The fire extinguisher gas expands gradually while passing through the pipe 31, and the expansion of the fire extinguishing gas is alleviated when the fire extinguishing gas is rapidly expanded when released into the atmosphere from the opening 31b formed at the tip of the inner pipe 31. It is possible to weaken the shock wave generated by this and reduce the noise generated when the extinguishing agent gas is released.

In this case, the size and the number (opening ratio) of the through holes 31a formed in the peripheral surface of the inner pipe 31 can be appropriately set according to the pressure and flow rate of the extinguishing agent gas.
Further, in the space 33 formed between the inner tube 31 and the outer tube 32, a metal wool such as glass wool, rock wool, steel wool, a nonwoven fabric of synthetic fiber or natural fiber, an inorganic material (metal A porous body (including a sintered body and a granular body) made of a metal oxide and a metal hydroxide), a synthetic resin foam, a honeycomb-like rectifier, etc. It can be filled with a material that eliminates the turbulence of the porous air flow or can remain in space.
Further, the outer tube 32 can be made of a sintered metal.

In the present embodiment, the extinguishing agent gas is discharged from the opening 31b formed at the tip of the inner pipe 31 to the extinguishing target section. However, as shown in FIG. (Deflection member) 5 is provided, and the extinguishing agent gas discharged from the opening 31b formed at the tip of the inner pipe 31 is deflected by the deflector (deflection member) 5 and discharged to the fire extinguishing target section. As shown in c), a cone-shaped horn (diffusion member) 6 is provided, and the extinguishing agent gas discharged from the opening 31b formed at the tip of the inner tube 31 is diffused by the horn (diffusion member) 6 to extinguish the fire. It can also be released into the target compartment.

According to the jet head 1A having a silencing function for the gas fire extinguishing equipment, the silencer is installed in the jet head 1A installed to discharge the extinguishing agent gas to the fire extinguishing target section in the gas fire extinguishing equipment using the fire extinguishing agent gas. By arranging 3A, the noise generated when the fire extinguisher gas is released can be reduced, and even if there is a person who escapes in the fire extinguishing target section when the gas fire extinguishing equipment is activated, the fire extinguishing gas is released. Panic due to the noise generated during the operation, and it is possible to prevent the broadcast that prompts evacuation from becoming difficult to hear, and furthermore, the noise generated when the fire extinguishing agent gas is released from the jet head It is possible to prevent adverse effects on people who are present.
In addition, the silencer 3A disposed in the ejection head 1A can be easily disposed as a silencer 3A as a silencer, and the silencer 3A can be arranged in accordance with the required degree of silence, installation conditions, and the like. Since it can be designed, the necessary silencing performance can be reliably obtained.

FIG. 2 shows a second embodiment of an ejection head having a sound deadening function for the gas fire extinguishing equipment of the present invention.
The jet head 1B having a silencing function for the gas fire extinguishing equipment is provided with an orifice 2 in the jet head 1B connected to the pipe 4 to which the extinguishing agent gas is supplied, and a silencer 3B is disposed on the tip side thereof. The fire extinguishing agent gas is discharged to the fire extinguishing target section through the silencer 3B.

In the present embodiment, the silencer 3B includes a hole portion 35a that communicates with the internal flow path 34 at the center so that the fire extinguisher gas is discharged in a radial direction from the internal flow path 34 that is the flow path of the fire extinguishing agent gas. A plurality of disk-shaped plate members 35 having a gap are spaced by spacers (not shown) and fixed by bolts 37 to form a discharge flow path 36 through which extinguishing agent gas is discharged in the radial direction. Yes.
This silencer 3B reduces the noise generated when the extinguishing agent gas is released by weakening the shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifice 2 of the ejection head 1B is directly released into the atmosphere, the extinguishing agent gas expands rapidly, and noise is generated accordingly, but the ejection head 1B of the present embodiment. , A plurality of disk-shaped discs having a hole portion 35a communicating with the internal flow path 34 at the center so that the fire extinguishing gas is discharged in a radial direction from the internal flow path 34 serving as a flow path for the fire extinguisher gas. The plate member 35 is spaced by spacers (not shown) and fixed by bolts 37 to form a discharge flow path 36 through which the extinguishing agent gas is discharged in the radial direction. The fire extinguishing agent gas gradually expands while passing through the discharge flow path 36, and the expansion of the fire extinguishing gas is alleviated by reducing the rapid expansion when the fire extinguishing gas is released from the discharge flow path 36 into the atmosphere. Weakening the shock waves caused by Rukoto, extinguishant gas can reduce the noise occurring when released.

  In this case, the size and number of the disk-shaped plate material 35 and the discharge flow path 36 can be appropriately set according to the pressure and flow rate of the extinguishing agent gas.

  Other actions of the jet head 1B having a silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1A having a silencing function for the gas fire extinguishing equipment of the first embodiment.

FIG. 3 shows a third embodiment of an ejection head having a sound deadening function for the gas fire extinguishing equipment of the present invention.
The jet head 1C having a sound extinguishing function for the gas fire extinguishing equipment has a plurality (four in the present embodiment) that open laterally to the jet head 1C connected to the pipe 4 to which the extinguishing agent gas is supplied. In addition, a silencer 3C is disposed so as to cover the outer periphery of the orifice 2, and the extinguishing agent gas is discharged to the extinguishing target section through the silencer 3C.

In the present embodiment, the silencer 3C includes a cylindrical casing 38 provided around the outer periphery of the orifice 2 and a filler 39a disposed in the opening 38a of the casing 38 serving as a flow path for the extinguishing agent gas. I am trying to configure it.
The silencer 3C is designed to reduce a noise generated when the extinguishing agent gas is released by weakening a shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifice 2 of the ejecting head 1C is directly released into the atmosphere, the extinguishing agent gas rapidly expands, and noise is generated accordingly, but the ejecting head 1C of the present embodiment. , The outer periphery of the orifice 2 serving as a flow path for the extinguishing agent gas is covered with a casing 38, and the filler 39a is disposed in the opening 38a of the casing 38. The agent gas gradually expands while passing through the casing 38 and further the filler 39a, and mitigates the rapid expansion when released into the atmosphere from the opening 38a of the casing 38. The shock wave generated by the expansion of the gas can be weakened, and the noise generated when the extinguishing agent gas is released can be reduced.

In this case, the filler 39a includes metal wool such as glass wool, rock wool, and steel wool, nonwoven fabrics of synthetic fibers and natural fibers, and inorganic materials (including metals, metal oxides, and metal hydroxides). A material that eliminates the disturbance of a fibrous or porous air flow through which a gas can flow, such as a porous body (including a sintered body and a granular body), a synthetic resin foam, and a rectifier having a honeycomb structure, can be used.
Further, in order to prevent the filler 39a from being scattered or the like, it is sandwiched by sandwiching plates 39b1 and 39b2 made of a punching metal, an expanded metal, a sintered metal plate, a honeycomb structure rectifier or the like according to the material of the filler 39a. It can be arranged in a state.
Further, in order to further enhance the silencing effect, the inner circumference and / or outer circumference of the casing 38 is further coated with a material having a sound absorbing property as necessary, or the casing 38 is made of sintered metal. Can also be configured.

  Other actions of the jet head 1C having a silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1A having a silencing function for the gas fire extinguishing equipment of the first embodiment.

  By the way, the arrangement form of the filler 39a and the like of the ejection head 1D having a sound extinguishing function for the gas fire extinguishing equipment of the third embodiment is not limited to the one described in the embodiment, but various as described below. The form of can be adopted.

FIG. 4 shows a first modified embodiment of the third embodiment.
In the ejection head 1C1 having a silencing function for the gas fire extinguishing equipment, the silencer 3C1 is provided on the outer periphery of a plurality (four in the present embodiment) of orifices 2 that open in the lateral direction. A cylindrical casing 38 having an opening 38a serving as a flow path for the extinguishing agent gas, and an outer periphery of the opening facing the lateral direction of the orifice 2 are provided in the casing 38 so as to cover with a small space. The bottomed filler 39a1 is configured.
This silencer 3C1 is designed to reduce the noise generated when the extinguishing agent gas is released by weakening the shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifice 2 of the ejection head 1C1 is directly released into the atmosphere, the extinguishing agent gas rapidly expands and noise is generated accordingly, but the ejection head 1C1 of the present embodiment. Since the outer periphery of the orifice 2 serving as the flow path for the extinguishing agent gas is covered with the casing 38 via the filler 39a1, the extinguishing agent gas that has passed through the orifice 2 gradually passes through the filler 39a1. When the gas is expanded into the opening 38a of the housing 38 and is released into the atmosphere, the expansion is reduced, the shock wave generated by the expansion of the extinguishing agent gas is weakened, and the extinguishing agent gas is released. Noise generated at the time can be reduced.
In addition, when there is a liquid combustible material or the like, there is a problem that the combustible material is scattered by jetting out the fire extinguishing agent gas, thereby expanding the range of the fire. This flow rate is greatly decelerated while passing through the filler 39a1, so that this problem can be solved together.

  In this case, the filler 39a1 can be made of a material that eliminates the disturbance of a fibrous or porous air flow through which gas can flow. In particular, an inorganic material (metal, metal oxide) having high shape retention performance can be used. In addition, a porous body made of a sintered body of a metal hydroxide is preferably used.

Moreover, as shown in FIG.4 (b), the bottomed cylindrical shield 39c which does not distribute | circulate gas can be arrange | positioned in the lower part of the space formed between the orifice 2 and the filler 39a1.
As a result, the fire extinguishing agent gas that has passed through the orifice 2 of the ejection head 1C1 is temporarily received by the shield 39c, and then the filling material 39a1 is passed, so that the filling material 39a1 is damaged by the pressure of the fire extinguishing agent gas. The fire extinguishing agent gas can smoothly pass through the filler 39a1.

  Although it is possible not to form a space between the orifice 2 of the ejection head 1C1 and the filler 39a1, by forming the space, the fire extinguishing agent gas that has passed through the orifice 2 of the ejection head 1C1 is temporarily changed. It can be diffused by discharging into the space formed between the orifice 2 of the ejection head 1C1 and the filler 39a1, and the extinguishing agent gas can smoothly pass through the filler 39a1.

  Other actions of the jet head 1C1 having a silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1C having a silencing function for the gas fire extinguishing equipment of the third embodiment.

FIG. 5 shows a second modification of the third embodiment.
In the ejection head 1C2 having a silencing function for the gas fire extinguishing equipment, the silencer 3C2 has a disk shape (or a figure at the outlet) of a plurality (six in this embodiment) of orifices 2 that open downward. A conical deflector (deflection member) 5 as shown in FIG. 9 (b) is provided to form an opening 38a serving as a flow path for the extinguishing agent gas provided around the opening deflected laterally. The cylindrical casing 38 and a bottomed filler 39a1 disposed in the casing 38 so as to cover the outer periphery of the opening facing the lateral direction of the orifice 2 are configured.
Further, in this ejection head 1C2, a material (not shown) that eliminates the disturbance of a fibrous or porous air flow through which gas can flow is disposed at the outlet of the orifice 2 that opens downward, and a slit is formed around the periphery. Etc. are covered with a cover member 39d through which gas can flow.
In this case, the material that eliminates the turbulence of the fibrous or porous gas flow through which the gas can flow is arranged as close as possible so as not to generate a void that causes the turbulence of the air flow at the outlet of the orifice 2. It is preferable to do.
The silencer 3C2 is designed to reduce the noise generated when the extinguishing agent gas is released by weakening the shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifice 2 of the ejection head 1C2 is directly released into the atmosphere, the extinguishing agent gas rapidly expands and noise is generated accordingly, but the ejection head 1C2 of the present embodiment. In this case, a material that eliminates turbulence of a fibrous or porous gas flow through which gas can flow is disposed at the outlet portion of the orifice 2 that opens downward as a flow path for the extinguishing agent gas, and the opening that faces in the lateral direction. Since the extinguishing agent gas that has passed through the orifice 2 eliminates turbulence in the fibrous or porous air flow through which the gas can flow, and the filler 39a1 The shock wave generated by the expansion of the fire-extinguishing gas is alleviated by gradually expanding while passing through the gas, and mitigating the rapid expansion when released into the atmosphere from the opening 38a of the housing 38. Umate, extinguishing agent gas can be reduced the noise occurring when released.
In addition, when there is a liquid combustible material or the like, there is a problem that the combustible material is scattered by jetting out the fire extinguishing agent gas, thereby expanding the range of the fire. This flow rate is greatly reduced while passing through the filler 39a1 and the material that eliminates the disturbance of the fibrous or porous gas flow through which the gas can flow, and this problem can be solved together.

  In this case, the filler 39a1 can be made of a material that eliminates the disturbance of a fibrous or porous air flow through which gas can flow. In particular, an inorganic material (metal, metal oxide) having high shape retention performance can be used. In addition, a porous body made of a sintered body of a metal hydroxide is preferably used.

In addition, glass wool, rock wool, steel, etc. are used as materials for eliminating the disturbance of the fibrous or porous air flow through which the gas can be circulated, which is disposed at the outlet of the orifice 2 that opens downward as a flow path for the extinguishing agent gas. A porous body made of a sintered body of metal wool such as wool or an inorganic material having a high shape retention performance (including metal, metal oxide, and metal hydroxide) can be suitably used.
The cover member 39d includes a punching metal, an expanded metal, a sintered metal plate, a honeycomb structure rectifier, etc., depending on the material of the material that eliminates the disturbance of the fibrous or porous air flow through which the gas can flow. Although it can be used, it can be omitted depending on the material of the material that eliminates the disturbance of the fibrous or porous airflow through which the gas can flow.

Further, as shown in FIG. 5B, a space can be formed between the orifice 2 of the ejection head 1C2 and the filler 39a1.
Thus, the extinguishing agent gas that has passed through the orifice 2 of the ejection head 1C2 is once diffused by being discharged into the space formed between the orifice 2 of the ejection head 1C2 and the filling material 39a1, and the extinguishing agent gas is diffused. Can pass smoothly.

  Other actions of the jet head 1C2 having a silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1C having a silencing function for the gas fire extinguishing equipment of the third embodiment.

  By the way, in each said Example, although the silencer was comprised with the silencer 3A, 3B, 3C arrange | positioned at ejection head 1A, 1B, 1C, the noise reduction effect is devised by devising the shape of the orifice 2. Can also be obtained.

  Specifically, the shape of the orifice 2 serving as the sound deadening means is not particularly limited. For example, as shown in FIG. 6, an ejection head 1 </ b> D (FIG. 6A) composed of an ISA nozzle is long. An injection head 1E (FIG. 6B) composed of a circular nozzle, an ejection head 1F composed of a nozzle-shaped venturi tube (FIG. 6C), an ejection head 1G composed of a conical venturi tube (FIG. 6D), etc. As a more specific example, FIG. 6E shows an ejection head 1H composed of a nozzle (Laval nozzle) in which the inner shape of the conical venturi tube is gently deformed.

The jet heads 1D to 1H are configured to reduce the noise generated when the extinguishing agent gas is released by weakening the shock wave generated by the expansion of the extinguishing agent gas.
That is, when the extinguishing agent gas that has passed through the orifices 2 of the ejection heads 1D to 1H is directly released into the atmosphere, the extinguishing agent gas rapidly expands, and noise is generated accordingly. In the heads 1D to 1H, the fire extinguisher gas that has passed through the orifice 2 gradually expands while passing through the ejection heads 1D to 1H, and the fire extinguishing agent is alleviated from being rapidly expanded when released into the atmosphere. The shock wave generated by the expansion of the gas can be weakened, and the noise generated when the extinguishing agent gas is released can be reduced.

  In this way, by using the silencer having the shape of the orifice 2, the silencer can have a simple structure, the ejection head can be configured compactly, and can be applied to existing equipment as it is.

  Other operations of the jet heads 1D to 1H having a silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1A having a silencing function for the gas fire extinguishing equipment of the first embodiment.

Similarly, only the structure in which the material that eliminates the disturbance of the fibrous or porous air flow through which the gas can circulate is provided at the outlet of the orifice 2 as shown in the second modified example of the third example (tubular shape). The case 38 can be omitted) to obtain a silencing effect.
In this case, the material that eliminates the turbulence of the fibrous or porous gas flow through which the gas can flow is arranged as close as possible so as not to generate a void that causes the turbulence of the air flow at the outlet of the orifice 2. It is preferable to do.

Specifically, as shown in FIG. 7, by arranging a material 7 that eliminates the disturbance of a fibrous or porous air flow through which gas can flow at the outlet of the orifice 2 of the ejection heads 1I and 1J, the orifice The fire extinguisher gas that has passed through 2 expands rapidly while passing through the material 7 that eliminates the turbulence of the fibrous or porous gas flow through which the gas can circulate, thereby rapidly expanding when released into the atmosphere. It is possible to reduce the noise generated when the extinguishing agent gas is released by reducing the shock wave generated by the expansion of the extinguishing agent gas.
Here, the ejection head 1I shown in FIG. 7A includes a plurality of (six in the present embodiment) orifices 2 and has a disc shape (or as shown in FIG. 9B) at the outlet thereof. A conical-shaped deflector (deflecting member) 5 is provided and has an opening deflected laterally. The ejection head 1J shown in FIG. 7B has a downward opening continuous with one orifice 2. It is equipped with.
The form of the ejection head and the orifice is not limited to that of the present embodiment.

  In this case, the material 7 that eliminates the disturbance of the fibrous or porous air flow through which the gas can flow includes, in particular, metal wool such as glass wool, rock wool, and steel wool, or an inorganic material (metal, A porous body made of a sintered body of metal oxide and metal hydroxide) is punched metal, expanded metal, sintered metal plate material, honeycomb as required according to the material, etc. By using together the cover member which consists of a structure rectifier etc., it can use suitably.

  In this way, the sound deadening means is made of the material 7 that eliminates the disturbance of the fibrous or porous air flow through which the gas that is disposed at the outlet of the orifice 2 can flow. The head can be configured compactly and can be applied to existing equipment as it is.

  The other effects of the jet heads 1I and 1J having the silencing function for the gas fire extinguishing equipment of the present embodiment are the same as those of the jet head 1C2 having the silencing function for the gas fire extinguishing equipment of the second modified embodiment of the third embodiment. It is the same.

By the way, the material 7 which eliminates the disturbance of the fibrous or porous air flow through which the gas can be circulated disposed at the outlet portion of the orifice 2 is composed of a homogeneous material as a whole, and the ejection heads 1K and 1L shown in FIG. As shown in the above, a material in which the pore diameter of the void of the fibrous or porous material is changed in the direction in which the gas flows, for example, a material in which the hole diameter of the void in the fibrous or porous material is reduced in the direction in which the gas flows. Can be used.
Specifically, the jet head 1K shown in FIG. 8A includes a plurality of orifices 2, and at the outlet thereof, a metal porous material 7a made of a three-dimensional network having a large pore diameter at the center. 8 is provided with a material 7 that eliminates turbulence of a disk-shaped porous air flow that is formed by laminating a metal porous material 7b having a smaller pore diameter in the outer peripheral portion in a layered manner. A jet head 1L shown in b) includes a plurality of orifices 2, and at the outlet thereof, a metal porous material 7a made of a three-dimensional network having a large pore diameter at the center and a void from the outer periphery thereof. A material 7 is disposed in which a cylindrical porous material 7b having a small pore diameter is arranged in a layered structure to eliminate the disturbance of a porous porous air flow.
In addition, the material 7 which eliminates the disorder | damage | failure of the form of a jet head or an orifice, and the fibrous or porous airflow which can distribute | circulate gas is not limited to the thing of a present Example.

  Table 1 shows a case where a homogeneous material (the same material as the metal porous material 7a having a large pore diameter) is used for the jet head 1K shown in FIG. 8A and the material 7 for eliminating the disturbance of the porous airflow. The result of having performed the comparative test of is shown.

  As is apparent from the results of the comparative test in Table 1, the gas flows through the pore diameter of the voids in the material 7 that eliminates the disturbance of the fibrous or porous air flow that can flow through the gas disposed at the outlet of the orifice 2. By using a material that changes its direction, for example, a material whose pore diameter is reduced in the direction in which the gas flows, the noise generated when the extinguishing agent gas is released is further reduced while ensuring the gas flow rate. Confirmed that you can.

  As described above, the ejection head having a silencing function for the gas fire extinguishing equipment of the present invention has been described based on a plurality of examples, but the present invention is not limited to the configuration described in the above examples, for example, The configuration described in each example is appropriately combined, or the configuration is appropriately set within a range that does not deviate from the gist, such as using various structures that can reduce noise generated when the extinguishing agent gas is discharged to the silencer. It can be changed.

  Since the jet head having a silencing function for the gas fire extinguishing equipment of the present invention can reduce noise generated when the extinguishing agent gas is released, a gas that uses extinguishing agent gas such as carbon dioxide, nitrogen, fluorine compound, etc. It can be widely used for fire extinguishing equipment, and is applicable to existing gas fire extinguishing equipment only by replacing the injection head or attaching a silencer. be able to.

1A Injection head having a silencing function for gas fire extinguishing equipment 1B Injection head having a silencing function for gas fire extinguishing equipment 1C Injection head having a silencing function for gas fire extinguishing equipment 1C1 Having a silencing function for gas fire extinguishing equipment Ejection head 1C2 Ejection head having a silencing function for gas fire extinguishing equipment 1D Ejection head having a silencing function for gas fire extinguishing equipment 1E Ejection head having a silencing function for gas fire extinguishing equipment 1F Silencing function for gas fire extinguishing equipment 1G Injection head having a silencing function for gas fire extinguishing equipment 1H Injection head having a silencing function for gas fire extinguishing equipment 1I Injection head having a silencing function for gas fire extinguishing equipment 1J For gas fire extinguishing equipment Ejection head with silencer function 1K Ejection head with silencer function for gas fire extinguishing equipment 1L For gas fire extinguishing equipment Jet heads 2 orifices 3A silencer 3B silencer 3C silencer 3C1 silencer 3C2 silencer 4 pipe 5 deflector having a mute function (deflecting member)
6 Horn (Diffusion member)
7 Material that eliminates turbulence in fibrous or porous air flow through which gas can flow 7a Metal porous material with large pore diameter 7b Metal porous material with small pore diameter

Claims (2)

In a fire extinguishing system using a fire extinguishing agent gas, a jet head including a silencing means installed to discharge the extinguishing agent gas to a fire extinguishing target section, the silencing means being a pipe to which the extinguishing agent gas is supplied An orifice having an opening area smaller than the opening area of the pipe provided in an injection head screwed to and connected to the outlet, and a three-dimensional flow through which an extinguishing agent gas disposed at the outlet of the orifice can flow A cylindrical metal porous airflow material that eliminates the turbulence of the metal porous structure, the material that eliminates the turbulence of the metal porous airflow is disposed in contact with the outlet of the orifice , and the metal A material that eliminates the turbulence of the porous airflow is in contact with the cylindrical first material disposed in contact with the outlet portion of the orifice, the outer peripheral surface of the first material, and the surface opposite to the outlet portion of the orifice. Arranged , Pore size of the gap than the first material consists of a small second material exposed to the atmosphere exterior surface of the second material is a planar, gas-based extinguishing systems, characterized in that as formed by open A jetting head having a sound deadening function. In a fire extinguishing system using a fire extinguishing agent gas, a jet head including a silencing means installed to discharge the extinguishing agent gas to a fire extinguishing target section, the silencing means being a pipe to which the extinguishing agent gas is supplied An orifice having an opening area smaller than the opening area of the pipe provided in an injection head screwed to and connected to the outlet, and a three-dimensional flow through which an extinguishing agent gas disposed at the outlet of the orifice can flow A cylindrical metal porous airflow material that eliminates the turbulence of the metal porous structure, the material that eliminates the turbulence of the metal porous airflow is disposed in contact with the outlet of the orifice , and the metal The material that eliminates the turbulence of the porous airflow is a cylindrical first material disposed in contact with the outlet of the orifice, and a first material disposed in contact with the outer peripheral surface of the first material. Small pore size The second consists of a material, exposed to the atmosphere exterior surface of the second material is a circumferential surface shape, ejecting head having a silencing function for gas-based extinguishing systems, characterized in that set to be open.

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