JP2013169472A - Jet head with silencing function for gas type fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact jet head for gas type fire extinguishing equipment, enhancing the reduction rate of noise, and reducing the jet reaction force of a fire extinguishing agent gas applied to the jet head when the fire extinguishing agent gas is discharged.SOLUTION: A jet head 1 includes a silencing means installed so as to discharge a fire extinguishing agent gas in a fire extinction target section in gas type fire extinguishing equipment using the fire extinguishing agent gas. The silencing means comprises a block-shaped silencing member 4 disposed in outlet parts of orifices 31, and made of a porous material through which gas can flow, wherein the end face on one side of the silencing member 4 is disposed such that the end face contacts with a jet head body 2, and the peripheral face and the end face on the other side of the silencing member 4 except a portion contacting with a ring member 6 fixing the silencing member 4 to the jet head body 2 through bolts 5 are opened to the air.

Description

  The present invention relates to a jet head installed on a ceiling, a wall surface, etc., in order to release a fire extinguishing agent gas to a fire extinguishing target section in a gas fire extinguishing equipment using a fire extinguishing agent gas such as nitrogen, carbon dioxide, and 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 using fire extinguishing gas such as nitrogen, carbon dioxide, fluorine compound, etc., when the gas fire extinguishing equipment is activated at the time of fire extinguishing, within about 1 minute (10 seconds in case of fluorine compound fire extinguishing gas) 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 20 of the ejection head 10A connected to the pipe 40 to which the extinguishing agent gas is supplied as shown in FIG. 5 is provided with an orifice 20, and the extinguishing agent gas is directly discharged from the orifice 20 to the extinguishing target section. As shown in FIG. 13 (b), an orifice 20 and a conical deflector (deflecting member) 50 are provided at the outlet of the ejection head 10 B connected to a pipe 40 to which a fire extinguishing agent gas is supplied. A fire extinguishing agent gas deflected by a deflector (deflecting member) 50 and discharged to a fire extinguishing target section, and further, as shown in FIG. The mouth is provided with an orifice (not shown) and a cone-shaped horn (diffusion member) 60, and the extinguishing agent gas emitted from the orifice is diffused by the horn (diffusion member) 60 and released to the fire extinguishing target section. Things have been widely used.

  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 fire extinguishing agent gas discharged from the ejection head is limited by the orifice 20, but for this reason, when the fire 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, when operating the gas fire extinguishing equipment, it is assumed that there is no person in the fire extinguishing target section. Therefore, for the noise (vibration) generated when the fire extinguishing agent gas is released from the jet head In the past, no problems were considered and no measures were taken.

  However, recently, when there is a person who escaped in the fire extinguishing target section when operating the gas fire extinguishing equipment, there is noise around the fire extinguishing agent gas emitted from the jet head. The noise generated when fire extinguishing gas is released is based on the knowledge that there is a risk of adverse effects on people and that noise (vibration) causes failure of precision equipment such as information and communication equipment. Techniques for reducing have been proposed (see, for example, Patent Documents 1 to 3).

JP 2011-115255 A JP 2011-125673 A JP 2011-255152 A

As described above, among the above-described techniques for dealing with problems caused by noise (including “vibration”, hereinafter simply referred to as “noise”) generated when the extinguishing agent gas is discharged from the ejection head, The technique described in Patent Document 1 links the start timing of the fire extinguishing equipment and the avoidance measure timing for preventing the malfunction of the ICT device accompanying the start of the fire extinguishing equipment when the fire extinguishing equipment is to be started. It was not intended to reduce noise.
On the other hand, the techniques described in Patent Documents 2 and 3 are also intended to reduce noise, but in order to increase the noise reduction rate, it is necessary to increase the size of the ejection head. There were problems of restrictions and cost increase.

  Furthermore, in this type of jet head, when the fire extinguishing agent gas is released, a large jet reaction force of the fire extinguisher gas is applied to the jet head, so that sufficient support is provided for the building where the piping system including the jet head is installed. It was necessary to give power, and this point also led to problems such as restrictions on installation location and cost increase.

  In view of the problems of the conventional gas fire extinguishing equipment jet head, the present invention can increase the noise reduction rate by a small jet head and is applied to the jet head when the extinguishing agent gas is discharged. An object of the present invention is to provide a gas fire extinguishing equipment jet head capable of reducing the jetting reaction force of a fire extinguishing agent gas.

  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 including a silencing means, wherein the silencing means is constituted by a block-shaped silencing member made of a porous material through which a gas can be circulated disposed at an outlet of the orifice, and is arranged on one side of the silencing member. The end surface is disposed in contact with the ejection head main body, and the peripheral surface of the silencing member and the other end surface are exposed to the atmosphere except for a portion that is in contact with a ring member that fixes the silencing member to the ejection head main body via a bolt. It is characterized by being opened.

  In this case, the bolt can be screwed into the ejection head main body through the inside of the muffling member.

  Moreover, the part of the silencing member through which the bolt penetrates can be formed in a shape that bulges to the outer peripheral side from other parts.

  In addition, an orifice plate having an orifice can be detachably disposed on the ejection head main body, which is in contact with one end face of the silencer member.

  Moreover, the small diameter part side of the said orifice can be made to face a muffling member.

  Moreover, the hole diameter of the space | gap of the silencing member porous material which comprises the said silencing member can be made small in the direction where gas distribute | circulates.

Further, the extinguishing agent gas injection reaction force F applied to the ejection head when the extinguishing agent gas is discharged and the flow rate Q of the extinguishing agent gas discharged from the ejection head satisfy the relationship of Equations 1 and 2. can do.
F (kgf) = A (kgf · min / m ³ ) · Q (m ³ / min) (Formula 1)
A (kgf · min / m ³ ) ≦ 0.2 (Expression 2)

  According to the jet head having a silencing function for the gas fire extinguishing equipment of the present invention, the silencing means is constituted by a block-shaped silencing member made of a porous material through which a gas disposed at the outlet of the orifice can flow, The one end surface of the silencing member is disposed in contact with the ejection head body, and the peripheral surface and the other end surface of the silencing member are in contact with a ring member that fixes the silencing member to the ejection head body via a bolt. Except for the part, by being open to the atmosphere, it is possible to increase the discharge area of the extinguishing agent gas released to the atmosphere of the silencer member, increase the noise reduction rate, and the extinguishing agent gas Reduce the injection reaction force of the fire extinguishing agent gas applied to the ejection head when released, coupled with the fact that the amount of the fire extinguishing agent gas released from the peripheral surface of the sound deadening member cancels out in units of the ejection head. In That. As a result, it is possible to reduce the size of the ejection head and reduce the supporting force required for the building where the piping system including the ejection head is installed, thereby eliminating the problem of restrictions on the installation location and cost increase. be able to.

  Further, by screwing the bolt into the ejection head main body through the inside of the silencer member, it is possible to further increase the discharge area of the extinguishing agent gas released to the atmosphere of the silencer member, and the noise reduction rate And the generation of noise due to the fire extinguisher gas being released interfering with the bolt can be prevented.

  Further, by forming the part of the silencer member through which the bolt penetrates into a shape that bulges to the outer peripheral side from other parts, the area of the extinguishing agent gas released to the atmosphere of the silencer member is further increased. And the noise reduction rate can be increased.

  In addition, an orifice plate in which an orifice is formed is detachably disposed on an ejection head main body that is in contact with one end face of the silencer member, so that an orifice plate having a plurality of types of orifices is selected according to conditions. Can do.

  Also, by making the small-diameter side of the orifice face the silencer member, the extinguishing agent gas is uniformly distributed from the central part to the peripheral part of the silencer member, thereby generating the fire extinguishing agent gas at the discharge site. Combined with the ability to make the noise to be uniform, the noise reduction rate can be further increased.

  In addition, by reducing the pore size of the pores of the porous material in the direction in which the gas flows, the fire extinguishing agent gas is uniformly discharged from each part of the sound extinguishing member, thereby generating noise generated at the extinguishing agent gas releasing part. Combined with the fact that it can be made uniform, the noise reduction rate can be further increased.

  Further, the extinguishing agent gas injection reaction force F applied to the ejection head when the extinguishing agent gas is discharged and the flow rate Q of the extinguishing agent gas discharged from the ejection head satisfy the relationship of Equations 1 and 2. By doing so, the supporting force required for the building where the piping system including the ejection head is installed can be reduced, and the problem of the restriction of the installation location and the cost increase can be solved.

It is the perspective view seen from diagonally below which shows the 1st example of the jet head which has the sound deadening function for gas fire extinguishing facilities of the present invention. It is the same front view. It is the left side view. It is the same top view. It is the bottom view. It is XX sectional drawing of FIG. It is a graph which shows the relationship between the injection reaction force F of the extinguishing agent gas which acts on an injection head when extinguishing agent gas is discharge | released, and the flow volume Q of the extinguishing agent gas discharge | released from an injection head. It is a front view which shows 2nd Example of the ejection head which has a sound deadening function for the gas fire extinguishing facilities of this invention. It is the left side view. It is the same top view. It is the bottom view. It is XX sectional drawing of FIG. 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.

  1 to 6 show 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 1 having a sound extinguishing function for the gas fire extinguishing equipment is a jet head installed to discharge the fire extinguishing agent gas to a fire extinguishing target section in the gas fire extinguishing equipment using the fire extinguishing agent gas. And an orifice plate 3 formed with a plurality of orifices 31 detachably disposed in a stepped portion 21 formed in the internal space of the ejection head body 2. And a block-shaped silencing member 4 made of a porous material through which gas can flow and disposed at the outlet of the orifice 31, and a ring member 6 that fixes the silencing member 4 to the ejection head body 2 via bolts 5. It is configured.

In this case, the orifice plate 3 in which the plurality of orifices 31 are formed is connected to the step portion 21 formed in the internal space of the ejection head main body 2 via, for example, a screw formed on the peripheral surface of the step portion 21 and the orifice plate 3. Therefore, the orifice plate 3 on which a plurality of types of orifices 31 are formed can be selected according to conditions such as the installation location.
The orifice plate 3 can be omitted, and the orifice 31 can be directly formed in the ejection head body 2 as in the second embodiment described later.

Moreover, it is preferable that the orifice 31 faces the muffling member 4 on the small diameter portion 31 a side of the orifice 31.
Thereby, the noise reduction rate is combined with the fact that the noise generated at the extinguishing agent gas discharge portion can be made uniform by allowing the extinguishing agent gas to uniformly flow from the center portion to the peripheral portion of the sound extinguishing member 4. Can be further enhanced.

  The block-shaped sound deadening member 4 made of a porous material is constituted by an integral structure, and as shown in the present embodiment, the center member 41, the peripheral surface member 42, and the end surfaces of the central member 41 and the peripheral surface member 42 are provided. It can be constituted by a divided structure comprising the end face member 43 to be covered.

  As the porous material constituting the sound deadening member 4, a sintered body made of an inorganic material (metal, metal oxide, metal hydroxide, etc.) having high shape retention performance can be suitably used.

The pore diameter of the pores of the porous material constituting the sound deadening member 4 is made of a homogeneous material as a whole, or a material changed in the direction in which the gas flows, more specifically, in the direction in which the gas flows. For example, in this embodiment, it can be configured with a material in which the hole diameters of the gaps of the peripheral surface member 42 and the end face member 43 are smaller than the hole diameters of the gaps of the central member 41. .
Thus, the extinguishing agent gas is uniformly discharged from each part of the silencing member 4 by reducing the pore diameter of the voids of the porous material constituting the silencing member 4 in the direction in which the gas flows. Combined with the fact that the noise generated at the gas discharge site can be made uniform, the noise reduction rate can be further increased.

Further, in both the integral structure and the divided structure, the sound deadening member 4 has one end face of the sound deadening member 4 in contact with the ejection head main body 2 (in the present embodiment, the orifice plate 3 may be included). The peripheral surface and the other end surface of the silencer member 4 are open to the atmosphere except for a portion that is in contact with the ring member 6 that fixes the silencer member 4 to the ejection head body 2 via bolts 5. I try to become.
Thereby, it is possible to increase the discharge area of the extinguishing agent gas released to the atmosphere of the sound extinguishing member 4, increase the noise reduction rate, and apply to the ejection head 1 when the extinguishing agent gas is released. The injection reaction force of the extinguishing agent gas can be reduced in combination with the amount of the extinguishing agent gas released from the peripheral surface of the sound deadening member 4 being offset by the unit of the ejection head 1.

In this case, the silencer 4 is passed through the inside of the silencer member 4, in this embodiment, the peripheral surface member 42 and the end face member 43, and screwed to the ejection head main body 2, so that the silencer member 4 is connected to the orifice plate. 3 is fixed to and integrated with the ejection head body 2.
As a result, the area of the extinguishing agent gas released to the atmosphere of the silencing member 4 can be further increased, the noise reduction rate can be increased, and the extinguishing agent gas released interferes with the bolt 5. It is possible to prevent noise from being generated.

Further, in this embodiment, the portion of the muffling member 4 through which the bolt 5 penetrates, and in this embodiment, the portions 42a and 43a of the peripheral surface member 42 and the end surface member 43 bulge to the outer peripheral side from other locations. The shape is formed.
Thereby, the discharge area of the fire extinguishing agent gas released to the atmosphere of the muffler member 4 can be further increased, and the noise reduction rate can be increased.
Further, when the porous material constituting the sound deadening member 4 is cut out from a plate-like sintered body, the waste of the material is eliminated by adopting the shape of the present embodiment (shape approximating a quadrangle). There is also an advantage that can be.

By the way, in the ejection head 1 of the present embodiment, when the extinguishing agent gas is released, the ejection reaction force F of the extinguishing agent gas applied to the ejection head and the flow rate Q of the extinguishing agent gas released from the ejection head are expressed by Equation 1 And the relationship of Formula 2 is satisfied.
F (kgf) = A (kgf · min / m ³ ) · Q (m ³ / min) (Formula 1)
A (kgf · min / m ³ ) ≦ 0.2 (Expression 2)
Here, A is a constant determined by the type of the ejection head and the extinguishing agent gas.
The value A is preferably 0.15 or less, more preferably 0.1 or less.

FIG. 7 shows extinguishing agent gas measured using nitrogen as the extinguishing agent gas for three types of ejecting heads (the ejecting head 1 of this example and the ejecting heads 10A and 10B in FIGS. 13A and 13B). The relationship between the injection reaction force F of the extinguishing agent gas applied to the ejection head when the gas is released and the flow rate Q of the extinguishing agent gas released from the ejection head is shown.
As is clear from the measurement results shown in FIG. 7, the jet head 1 of the present embodiment is more effective than the conventional jet head when the fire extinguisher gas is applied to the jet head when the fire extinguisher gas is released. It was confirmed that the magnitude of the force F can be reduced to about 1/5 to 1/10.
When carbon dioxide or a fluorine compound is used as the extinguishing agent gas, the value of A shows the same tendency as FIG.
Thereby, the support force requested | required of the building which installs the piping system containing the injection head 1 can be made small, and the restriction | limiting of an installation place and the problem of a cost rise can be eliminated.

By the way, in the present Example, although the site | part of the muffling member 4 which the volt | bolt 5 penetrates was formed in the shape bulged to the outer peripheral side from the other location, it is shown in FIGS. A uniform peripheral surface shape (cylindrical shape) can also be obtained as in the second embodiment of the ejection head having a sound deadening function for gas fire extinguishing equipment.
The remaining configuration and operation of the ejection head 1 of the second embodiment are the same as those of the ejection head 1 of the first embodiment.

  As described above, the jet head having a sound deadening function for the gas fire extinguishing equipment of the present invention has been described based on a plurality of embodiments. However, the present invention is not limited to the configuration described in the above embodiments, and the gist thereof is described. The configuration can be changed as appropriate without departing from the scope of the invention.

  The ejection head having a silencing function for the gas fire extinguishing equipment according to the present invention can increase the noise reduction rate by a small ejection head, and the extinguishing agent gas applied to the ejection head when the extinguishing agent gas is discharged. Can be used widely for gas fire extinguishing equipment that uses fire extinguishing gas such as nitrogen, carbon dioxide, fluorine compounds, etc., and applicable to new gas fire extinguishing equipment However, the present invention can be applied to existing gas fire extinguishing equipment simply by replacing the ejection head.

DESCRIPTION OF SYMBOLS 1 Injection head 2 Injection head main body 21 Step part 3 Orifice plate 31 Orifice 4 Silencer member 41 Center member 42 Peripheral surface member 43 End surface member 5 Bolt 6 Ring member

Claims (7)

  In a gas fire extinguishing facility using a fire extinguishing agent gas, an ejection head provided with a silencing means installed to discharge the extinguishing agent gas to a fire extinguishing target section, wherein the silencing means is disposed at an outlet portion of an orifice It is composed of a block-shaped silencing member made of a porous material through which gas can flow, and one end surface of the silencing member is disposed in contact with the ejection head body, and the peripheral surface and the other end surface of the silencing member However, a jet head having a silencing function for a gas fire extinguishing facility, wherein the jet head is open to the atmosphere except for a portion in contact with a ring member that fixes the silencing member to the jet head main body via a bolt.   2. The jet head having a silencing function for a gas fire extinguishing equipment according to claim 1, wherein the bolt penetrates through the inside of the silencing member and is screwed to the jet head main body.   3. A jet head having a silencing function for a gas fire extinguishing system according to claim 2, wherein a part of the silencing member through which the bolt penetrates is formed in a shape bulging to the outer peripheral side from other parts.   4. The gas fire extinguishing equipment according to claim 1, wherein an orifice plate in which an orifice is formed is detachably disposed on an ejection head main body that is in contact with one end face of the sound deadening member. A jet head with a mute function.   5. A jet head having a silencing function for a gas fire extinguishing facility according to claim 1, wherein a small diameter portion side of the orifice faces a silencing member.   6. The silencing function for a gas fire extinguishing facility according to claim 1, wherein the pore diameter of the porous material constituting the silencing member is reduced in the direction in which gas flows. Having an ejection head. The extinguishing agent gas injection reaction force F applied to the ejection head when the extinguishing agent gas is released and the flow rate Q of the extinguishing agent gas emitted from the ejection head satisfy the relationship of Equations 1 and 2. An ejection head having a sound deadening function for the gas fire extinguishing equipment according to claim 1, 2, 3, 4, 5 or 6.
F (kgf) = A (kgf · min / m ³ ) · Q (m ³ / min) (Formula 1)
A (kgf · min / m ³ ) ≦ 0.2 (Expression 2)

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