JP2013192960A - Spray head for gaseous fire extinguishing equipment having silencing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray head for gaseous fire extinguishing equipment configured to improve a noise reduction rate by a small spray head.SOLUTION: A spray head 1 with a silencing means in gaseous fire extinguishing equipment using fire extinguishing gas is installed in a fire-extinguishing object area for releasing the fire extinguishing gas. The silencing means includes a block-shaped silencing member 4 that is disposed on the outlet section of an orifice 31 and made of a porous material through which gas can flow. An end face of one side of the silencing member 4 that is opened to atmosphere is supported by a spray head body 2 via a ring member 5 coming into contact with a peripheral edge of the end face and a bolt 6 coming into contact with a central part of the end face.

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. 9B, an orifice 20 and a conical deflector (deflecting member) 50 are provided at the outlet of the ejection head 10 </ b> B connected to the pipe 40 to which the extinguishing agent gas is supplied. The fire extinguishing agent gas deflected by the deflector (deflecting member) 50 and discharged to the fire extinguishing target section, and the outlet portion of the ejection head 10C as shown in FIG. 9C An orifice (not shown) and a cone-shaped horn (diffusion member) 60 are provided, and a fire extinguishing agent gas discharged from the orifice is diffused by the horn (diffusion member) 60 and discharged to the fire extinguishing target section. It has been widely used in the past.

  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 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 was a problem of rising costs.

  The present invention provides a gas fire extinguishing equipment jet head capable of increasing the noise reduction rate with a small jet head in view of the problems of the conventional gas fire extinguishing equipment jet head. Objective.

  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 is constituted by a block-shaped silencing member made of a porous material capable of circulating a gas disposed at an outlet of the orifice, and the silencing member is opened to the atmosphere. The one end face is supported by the ejection head body via a ring member that abuts on the peripheral edge of the end face and a bolt that abuts on the center of the end face.

  In this case, an orifice plate in which an orifice is formed can be detachably disposed on the ejection head main body that is in contact with the other end surface of the muffler member, and the bolt can be screwed onto the orifice plate.

  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.

  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 silencer member is supported by the ejection head main body through a ring member that abuts the peripheral edge of the end surface and a bolt that abuts the center of the end surface. Since the member can be firmly restrained and supported by the main body of the ejection head, it is possible to use a silencing member having a large flow resistance of the extinguishing agent gas and having a high silencing performance per unit volume, thereby increasing the noise reduction rate. be able to. As a result, it is possible to reduce the size of the ejection head, and it is possible to solve the problem of restrictions on installation location and cost increase.

  In addition, an orifice plate having an orifice formed thereon is detachably disposed on the jet head main body that is in contact with the other end surface of the muffler member, and the bolt is screwed onto the orifice plate, so that a plurality of types can be obtained. The orifice plate in which the orifice is formed can be selected according to the conditions.

In addition, 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.

  Further, the extinguishing agent gas is uniformly discharged from each part of the silencing member by reducing the pore diameter of the pores of the silencing member porous material constituting the silencing member in the direction in which the gas flows. The noise reduction rate can be further increased in combination with the ability to make the noise generated at the discharge site uniform.

It is the perspective view seen from diagonally below which shows one 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 same rear view. It is the left side view. It is the same right 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 8 show an embodiment of an ejection head having a sound deadening function for the 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 silencer member 4 made of a porous material through which gas can flow, which is disposed at the outlet of the orifice 31, and the silencer in contact with the peripheral edge of one end surface of the silencer member 4 opened to the atmosphere. A ring member 5 that supports the member 4 on the ejection head main body 2, and a bolt 6 that abuts the central portion of one end face of the noise reduction member 4 that is open to the atmosphere and supports the noise reduction member 4 on the ejection head main body 2. Structure It is.

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. It is arranged to be detachable.
Thereby, the orifice plate 3 in which a plurality of types of orifices 31 are formed can be selected according to conditions such as the installation location.
It is also possible to omit the orifice plate 3 and directly form the same orifice in the ejection head main body 2 (not shown).

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 silencing member 4 made of a porous material may be composed of an integral structure, or may be composed of a divided structure composed of an upstream member 41 and a downstream member 42 as shown in the present embodiment. it can.

  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 the present embodiment, it can be made of a material in which the hole diameter of the gap in the downstream member 42 is smaller than the hole diameter of the gap in the upstream 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 the ejection head main body 2 (in this embodiment, an orifice on the other side of the sound deadening member 4 (opposite to the side opened to the atmosphere). The end surface on one side (side opened to the atmosphere) of the silencer member 4 is in contact with the peripheral portion of the end surface and the center portion of the end surface. The ejecting head main body 2 supports the bolt 6 through the abutting bolts 6.
In this case, the ring member 5 is detachably disposed on the ejection head main body 2 via screws formed on the peripheral surfaces of the ejection head main body 2 and the ring member 5.
And the downstream member 42 which comprises the muffling member 4 is formed in diameter larger than the upstream member 41, and the outer peripheral edge part of this downstream member 42 is made into the edge surface of the ejection head main body 2, and the edge part of the ring member 5. Can be secured so as to be able to increase the discharge area of the extinguishing agent gas released to the atmosphere of the silencer 4 (downstream member 42), and the noise reduction rate can be increased. .
The bolt 6 is screwed to the orifice plate 3.

  As a result, the silencing member 4 can be firmly restrained and supported by the ejection head body 2, so that it is possible to use the silencing member 4 having a large flow resistance of the extinguishing agent gas and high silencing performance per unit volume. The noise reduction rate can be increased, which makes it possible to reduce the size of the ejection head 1 and solve the problem of restrictions on installation location and cost increase.

  As mentioned above, although the jet head which has a sound deadening function for gas fire extinguishing facilities of the present invention was explained based on the example, the present invention is not limited to the composition described in the above example, and the purpose is The configuration can be changed as appropriate without departing from the scope.

  Since the jet head having a silencing function for the gas fire extinguishing equipment of the present invention can increase the noise reduction rate by a small jet head, a gas using a fire extinguisher gas such as nitrogen, carbon dioxide, fluorine compound, etc. The present invention can be widely used for the system fire extinguishing equipment, and the application target is not limited to the newly installed gas fire extinguishing equipment, but can be applied to the existing gas fire extinguishing equipment only by replacing the injection head.

DESCRIPTION OF SYMBOLS 1 Injection head 2 Injection head main body 21 Step part 3 Orifice plate 31 Orifice 4 Silencer member 41 Upstream member 42 Downstream member 5 Ring member 6 Bolt

Claims (4)

  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 circulate, and the end surface on one side that is open to the atmosphere of the silencing member is at the ring member that contacts the peripheral edge of the end surface and the center of the end surface An ejecting head having a sound deadening function for a gas fire extinguishing facility, characterized in that the ejecting head body is supported by an abutting bolt.   2. An orifice plate in which an orifice is formed is detachably disposed on an ejection head main body that is in contact with the other end surface of the noise reduction member, and the bolt is screwed to the orifice plate. A jet head having a sound deadening function for gas fire extinguishing equipment.   3. A jet head having a silencing function for a gas fire extinguishing facility according to claim 1, wherein the small diameter portion of the orifice faces the silencing member.   4. A jet head having a silencing function for a gas fire extinguishing equipment 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.

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