JP2006271518A - Draft chamber fire extinguisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a draft chamber fire extinguisher, wherein scattering of devices, reagents, etc., in a chamber in the case of ejecting a fire-extinguishing material can be prevented with simple constitution. <P>SOLUTION: The draft chamber fire extinguisher 6 attached to a draft chamber 1 comprises: a fire-extinguishing material storage container 15 for feeding the fire-extinguishing material; and a nozzle member 21 which is connected to the fire-extinguishing material storage container 15 and ejects the fire-extinguishing material from a nozzle port. The nozzle member 21 is provided on the side wall part 13a forming a chamber 3 being a laboratory space. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a draft chamber fire extinguishing apparatus.

  When performing a test that generates reaction gas and / or heat, such as a chemical test or corrosion test, there is a safety problem if the test is performed in an open space, so a chamber that is a test room space separated from the external space is provided. In many cases, a draft chamber provided with a draft capable of exhausting the inside of the chamber and exhausting reaction gas, heat, and the like is used as a test facility.

  In chemical tests, corrosion tests, etc., flammable substances are often used as test materials and reagents, and gas burners are used for heating test materials and reagents. May occur. In spite of the fact that a fire may occur in this way, chemical tests, corrosion tests, and the like are generally performed continuously for a long period of time, which may result in an unattended state where there is no supervisor.

  Therefore, a fire extinguishing device is provided in the draft chamber, and in particular, a fire extinguishing device has been proposed in which a fire is detected and an automatic fire extinguishing operation is performed even in an unattended state (see, for example, Non-Patent Document 1). In the fire extinguishing apparatus for a draft chamber disclosed in Non-Patent Document 1, when a fire is detected, a fire shutter provided in addition to an observation door provided in an opening formed in the draft chamber for test operation and observation. Close the opening to stop the draft exhaust and activate the fire extinguisher.

  However, when the fire shutter is provided, not only the fire shutter itself is required as a member, but also its driving means is required, so that the apparatus becomes large, the cost is increased, and the draft chamber is enlarged. There's a problem.

  In order to avoid such a problem, a fire extinguishing nozzle member is attached to the ceiling of the chamber formed in the draft chamber following the sprinklers used as fire extinguishing equipment for general buildings. A device is provided that closes only and discharges the extinguishing agent into the chamber from the fire extinguishing nozzle member in the ceiling.

  However, this apparatus has the following problems. In the chamber, which is a test room space, many test instruments, test materials, reagents, and the like are arranged when the test is executed. Containers that contain reagents used for testing are often open upward, and when a fire extinguisher is released downward from a nozzle member mounted on the ceiling, Since the reagent in the container is scattered, it may promote a fire especially when the reagent is a flammable substance. In addition, the discharge pressure of the fire extinguishing agent causes the instruments to collapse and scatter, and the test materials and reagents contained in the instruments scatter in the chamber and contaminate the interior of the chamber. There is a problem of requiring a great deal of time and cost.

DALTON draft chamber catalog Vol. 1, Dalton Co., Ltd., February 2003, p52

  An object of the present invention is to provide a draft chamber fire extinguishing apparatus that has a simple configuration and can prevent scattering of instruments, reagents, and the like in a chamber when a fire extinguishing agent is released.

The present invention includes a chamber that is a test room space separated from an external space, and an observation door that is formed on one surface of the chamber and that can be freely opened and closed at an opening that communicates the internal space of the chamber with the external space. In the draft chamber fire extinguishing device attached to the draft chamber,
A fire extinguishing agent supply means for supplying a fire extinguishing agent;
A draft chamber fire extinguishing apparatus comprising: a nozzle member connected to a fire extinguisher supply means and discharging a fire extinguisher from a nozzle hole, the nozzle member being provided on a side wall portion forming a chamber.

  According to the invention, the nozzle member is formed such that the nozzle hole emits a fire extinguishing agent in a direction along the wall surface of the side wall portion forming the chamber.

  Further, the present invention is characterized by including a door closing means for closing the observation door by the supply pressure of the fire extinguisher supplied from the fire extinguisher supply means.

  According to the present invention, the nozzle member that is connected to the extinguishing agent supply means and discharges the extinguishing agent from the nozzle hole is provided on the side wall portion that forms the chamber. As a result, the pressure of the fire extinguisher to be released is not directly applied to test instruments having an opening upward, so that scattering of reagents contained in the instrument can be prevented. , It is possible to suppress the scattering of the instrument itself. Therefore, it is possible to efficiently extinguish without promoting a fire, and it is easy to restore the chamber after extinguishing.

  According to the invention, the nozzle member is formed such that the nozzle hole discharges the fire extinguishing agent in the direction along the wall surface of the side wall portion forming the chamber. As a result, when the extinguishing agent is discharged from the nozzle member, the load of the extinguishing agent discharge pressure on the appliances and reagents in the chamber can be further reduced, so that scattering of the appliances and reagents in the chamber can be surely prevented. Can do.

  Moreover, according to this invention, the door closing means which closes an observation door with the supply pressure of the fire extinguisher supplied from a fire extinguisher supply means is included. As a result, the door closing means can be operated in response to fire detection to close the observation door, so that it is possible to efficiently extinguish the fire with the extinguishing agent released into the chamber.

  FIG. 1 is a front view showing a configuration of a draft chamber to which a draft chamber fire extinguishing apparatus according to an embodiment of the present invention is attached, and FIG. 2 is a system diagram showing a simplified configuration of the draft chamber fire extinguishing apparatus.

  The draft chamber 1 is roughly formed of a housing 2 that constitutes an outer shell, a chamber 3 that is a test chamber space that is formed in the housing 2 and is separated from the external space, and is formed on one surface of the chamber 3 so as to be inside the chamber 3. An observation door 5 provided in an openable / closable manner in an opening 4 that communicates the space and the external space, and a draft chamber fire extinguishing device 6 (hereinafter simply referred to as a fire extinguishing device) for extinguishing a fire generated in the chamber 3. including.

  The housing 2 is made of, for example, steel, and the outer shape is formed in a rectangular parallelepiped shape. The chamber 3 is formed by providing the ceiling part 11, the bottom part 12, and the side wall part 13 connected to the ceiling part 11 and the bottom part 12 inside the housing 2. The side wall portion 13 is composed of three surfaces, that is, a right side wall portion 13a constituting the right side surface on the paper surface of FIG. 1, a left side wall portion 13b constituting the left side surface, and a back side wall portion 13c constituting the back side surface. Composed. The opening 4 is formed on the front side of the chamber 3 so that the internal space and the external space of the chamber 3 communicate with each other. The opening 4 is formed for taking in and out of the test instrument 14 and reagents into the chamber and for a test operation. As described above, the chamber 3 has the opening 4 only on the front side, and the other surface is formed as a test chamber separated by the ceiling portion 11, the bottom portion 12, and the side wall portion 13.

  An observation door 5 is provided in the opening 4 so as to be opened and closed. The observation door 5 includes a frame member 5a and a transparent plate 5b made of glass or an acrylic plate fitted into the frame member 5a. In the present embodiment, the observation door 5 is configured to be movable up and down, and minimizes the opening 4 when it is lowered downward, and opens the opening 4 when it is raised upward. The vertically movable configuration of the observation door 5 will be described later. The observation door 5 is normally closed to improve the exhaust of the chamber 3 except during test preparation and test operation.

  Below the bottom 12 of the chamber 3 and inside the housing 2 is a fire extinguisher storage container that is a fire extinguishing agent supply means 15, a fire extinguisher control panel 16, a fuel gas pipe 17 for fuel gas supplied for testing, A gas cutoff valve 18 provided in the fuel gas pipe 17, a cutoff circuit 19 that outputs a gas cutoff operation command of the gas cutoff valve 18, and the like are provided.

  The fire extinguisher control panel 16 has a processing circuit and outputs a series of operation commands related to a fire extinguishing operation in accordance with a fire detection output of a fire detection means described later.

The fire extinguishing agent storage container 15 is, for example, a carbon dioxide (CO ₂ ) gas cylinder, and the cylinder is provided with an opener 15a. The opener 15 a opens the valve in accordance with an operation command from the fire extinguisher control panel 16 and supplies the fire extinguishing agent to the pipe 20 connected to the fire extinguishing agent storage container 15. The pipe 20 is laid to the right side wall 13a of the chamber 3, and the end of the pipe 20 is connected to the nozzle member 21 attached to the right side wall 13a of the chamber 3 using a pipe joint. It is a feature of the present invention that the nozzle member 21 is provided on the right side wall portion 13 a of the chamber 3.

  By providing the nozzle member 21 on the right side wall portion 13 a of the chamber 3, when the fire extinguisher is discharged from the nozzle member 21 into the chamber 3, the fire extinguisher released to the test instrument 14 having an opening upward. Since the pressure is not directly applied from the top to the bottom, it is possible to prevent the reagents contained in the instrument from being scattered and to suppress the collapse and scattering of the instrument itself.

  In the present embodiment, the nozzle member 21 is attached to the right side wall portion 13a closest to the position where the fire extinguisher storage container 15 is provided, but the position is not limited to this, and the position where the fire extinguisher storage container 15 is provided. Depending on the case, any side wall 13 may be selected and mounted. However, from the viewpoint of construction, it is preferable to provide the nozzle member 21 by selecting the side wall portion 13 so that the pipe 20 is as short as possible. The details of the nozzle member 21 will be described later.

  Each of the above-described devices installed below the bottom 12 of the chamber 3 is covered with the door member 25 in appearance by closing the door member 25 that can be opened and closed facing outward on the front side of the housing 2. And is configured to improve aesthetics. A remote operation panel 22 for remotely operating the fire extinguishing device control panel 16 may be provided outside the housing 2 so that the fire extinguishing device control panel 16 can be activated from the remote operation panel 22.

  An exhaust port 26 is formed in the ceiling portion 11 of the chamber 3, and a draft 27 is connected to the exhaust port 26 through the top plate portion 2 a of the housing 2. The draft 27 is a member formed in a cylindrical shape and constitutes a flow path of gas exhausted from the chamber 3. The draft 27 is provided with an exhaust fan motor 28, and the exhaust fan motor 28 exhausts the inside of the chamber 3, and the gas flowing through the draft 27 is sent to the exhaust treatment facility. The exhaust fan motor 28 is connected to the fire extinguisher control panel 16 via a shut-off circuit 29. When a fire is detected, the shut-off circuit 29 operates in accordance with an operation command from the fire extinguisher control panel 16, and the rotation is stopped. The As will be described later, the fire extinguisher is discharged into the chamber 3 simultaneously with the detection of the occurrence of the fire. Therefore, if the exhaust fan motor 28 continues to rotate and exhausts, the discharged fire extinguisher is exhausted and the fire extinguishing efficiency decreases. It is.

  A temperature sensor 23 that is a fire detection means is further provided on the ceiling 11 of the chamber 3. The temperature sensor 23 outputs a temperature detection output to the fire extinguisher control panel 16. The storage unit of the fire extinguisher control panel 16 stores in advance a program for determining the occurrence of a fire based on the temperature, detects the occurrence of a fire according to the detection output of the temperature sensor 23, and is used for alarming and extinguishing. An operation command is output.

  In the present embodiment, when the temperature detected by the temperature sensor 23 reaches, for example, 60 ° C., the fire extinguisher control panel 16 turns on the yellow lamp of the stacked indicator lamp 24 provided on the housing 2, and the interruption circuit 19 is turned on. An operation command is output and the gas shut-off valve 18 is closed. When the temperature in the chamber 3 further rises and the temperature detected by the temperature sensor 23 reaches, for example, 70 ° C., it is determined that a fire has occurred. When it is determined that a fire has occurred, the fire extinguisher control panel 16 turns on the red lamp of the laminated indicator lamp 24 provided on the housing 2, outputs an operation command to the shut-off circuit 29, stops the exhaust fan motor 28, Further, the opener 15 a of the extinguishing agent storage container 15 is opened to supply the extinguishing agent to the pipe 20. The fire extinguisher supplied into the pipe 20 is discharged from the nozzle member 21 into the chamber 3 and used for fire extinguishing.

  Therefore, the fire extinguisher storage container 15, the pipe 20, and the nozzle member 21 constitute the fire extinguishing device 6 in a narrow sense, and the temperature sensor 23 and the fire extinguishing device control panel 16 are also included in the fire extinguishing device in a broad sense.

  FIG. 3 is a cross-sectional view showing the configuration of the nozzle member 21. The nozzle member 21 of the present embodiment has a substantially columnar outer shape and is formed of stainless steel or copper alloy. The nozzle member 21 has a hole formed in a substantially circular central portion and extends in the height direction of the cylinder and does not penetrate to the tip portion, and the vicinity of the hole bottom portion 32 of the fire extinguishing agent flow hole 31. Are formed so as to be orthogonal to the extinguishing agent flow hole 31 and a notch 33 is formed to communicate the extinguishing agent flow hole 31 and the outer space of the nozzle member 21. In FIG. 3B, which shows a cross section perpendicular to the axis of the cylindrical nozzle member 21, the notch 33 is formed in a fan shape. Since this cut portion 33 constitutes a nozzle hole of the nozzle member 21, the cut portion 33 is hereinafter referred to as a nozzle hole.

  The fire-extinguishing agent flow hole 31 is connected to the fire-extinguishing agent passage of the pipe 20 by connecting the nozzle member 21 to the pipe 20 by a pipe joint on the opposite side of the hole bottom 32. Accordingly, a fire is detected by the temperature sensor 23, the opener 15 a is opened according to the operation command from the fire extinguishing device control panel 16, and the fire extinguisher supplied from the fire extinguisher storage container 15 to the pipe 20 is used as the fire extinguishing agent for the nozzle member 21. It flows through the flow hole 31 and is discharged from the nozzle hole 33 into the chamber 3.

  At this time, the nozzle hole 33 is formed so as to be orthogonal to the axis of the nozzle member 21 mounted so as to rise perpendicularly to the wall surface of the right side wall portion 13a of the chamber 3, so that the right side wall portion 13a It expands in a fan shape parallel to the wall surface. Therefore, the fire extinguisher discharged from the nozzle hole 33 moves upward along the wall surface of the right side wall surface 13a, and further moves along the surface of the ceiling portion 11 of the chamber 3, and then fills the chamber 3. Become. That is, the fire extinguishing agent released from the nozzle member 21 does not directly apply the release pressure to the test instrument, reagent, etc. in the chamber 3, so that it is possible to more reliably prevent the test instrument from collapsing and scattering of the reagent. Is possible.

  The shape of the nozzle member 21 is not limited to a cylindrical shape, and may be a prismatic shape, a conical shape, or other shapes. It is preferable to form the fire extinguishing agent in a direction along the wall surface of the side wall portion of the chamber in which the nozzle member is mounted.

  FIG. 4 is a diagram showing a simplified configuration of the door closing means for closing the observation door by the supply pressure of the fire extinguisher supplied from the fire extinguisher supply means. The observation door 5 has the opening 4 having a minimum area so that the fire extinguishing agent does not flow out from the opening 4 when a fire occurs and the extinguishing agent is discharged from the nozzle member 21 into the chamber 3. It is preferable to become. Therefore, if the observation door 5 is open when a fire occurs, it is desirable that the observation door 5 be closed simultaneously with the release of the extinguishing agent. Further includes door closing means 41 for closing the observation door 5 by the supply pressure of the extinguishing agent supplied from the extinguishing agent storage container 15 when a fire is detected.

  During normal times when no fire has occurred, the observation door 5 is manually opened and closed. One end 45a of the first wire 45 is connected to the observation door 5, and the first wire 45 extends upward and is stretched around the two first and second pulleys 42 and 43 so as to change its direction downward. The weight member 44 is connected to the other end 45b that is suspended. Therefore, when the observation door 5 is closed, the observation door 5 is manually pulled down, and the weight member 44 connected by the first wire 45 is pulled upward. Conversely, when the observation door 5 is opened, the observation door 5 is pulled up, and the weight member 44 connected by the first wire 45 is dropped to a position where it is held in contact with the weight stopper 53.

  The door closing means 41 operates to automatically close the observation door 5 when a fire occurs. In the present embodiment, the door closing means 41 includes a reciprocating drive unit 48 having a cylinder 46 and a piston 47, a third pulley 49 attached to the tip of the piston 47, and a weight provided below the weight member 44. The lifting metal 54 and the cylinder 46 are connected via a third pulley 49, and the second wire 50 is configured so that the end opposite to the end connected to the weight lifting metal 54 is fixed to the cylinder 46. A fire extinguishing agent introduction port 51 is formed at the lower part of the cylinder 46, and a branch pipe 52 branched from the pipe 20 is connected to the fire extinguishing agent introduction port 51.

  Therefore, when a fire is detected by the temperature sensor 23 and the detection output is given to the fire extinguisher control panel 16, the fire extinguisher control panel 16 opens the opener 15 a of the fire extinguisher storage container 15 and supplies the fire extinguisher to the pipe 20. Since it is supplied, the extinguishing agent supplied to the pipe 20 flows through the branch pipe 52 and flows into the cylinder 46 from the extinguishing agent introduction port 51. The extinguishant flowing into the cylinder 46 pushes up the piston 47 by its pressure, so that the third pulley 49 attached to the tip of the piston 47 moves upward and pushes up the second wire 50 applied to the third pulley 49. . In this way, the weight lifting bracket 54 connected to the second wire 50 is pulled up, and at the same time, the weight member 44 positioned above the weight lifting bracket 54 is pulled up and connected to the weight member 44 by the first wire 45. The door 5 moves downward and is closed.

  In this way, the observation door 5 is automatically closed in conjunction with the fire detection, and the observation door 5 can be closed in response to the fire even if there is no monitoring person. The fire extinguishing agent that is released makes it possible to extinguish the fire efficiently.

It is a front view which shows the structure of the draft chamber with which the draft chamber fire extinguishing apparatus which is one Embodiment of this invention is attached. It is a systematic diagram which simplifies and shows the structure of a draft chamber fire extinguishing apparatus. 3 is a cross-sectional view showing a configuration of a nozzle member 21. FIG. It is a figure which simplifies and shows the structure of the door closing means which closes an observation door with the supply pressure of the fire extinguisher supplied from a fire extinguisher supply means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Draft chamber 2 Housing 3 Chamber 4 Opening part 5 Observation door 6 Fire extinguishing apparatus 11 Ceiling part 12 Bottom part 13 Side wall part 15 Extinguishing agent storage container 16 Fire extinguishing apparatus control panel 20 Piping 21 Nozzle member 23 Temperature sensor 26 Exhaust port 27 Draft 28 Exhaust Fan motor 41 Door closing means

Claims (3)

Attached to a draft chamber having a chamber that is a test room space separated from the external space, and an observation door that is formed on one surface of the chamber and that can be opened and closed at an opening that communicates the internal space of the chamber and the external space. In the draft chamber fire extinguishing apparatus
A fire extinguishing agent supply means for supplying a fire extinguishing agent;
A draft chamber fire extinguishing apparatus, comprising: a nozzle member connected to a fire extinguisher supply means and discharging a fire extinguishing agent from a nozzle hole, the nozzle member being provided on a side wall portion forming a chamber. The nozzle member
2. The draft chamber fire extinguishing apparatus according to claim 1, wherein the nozzle hole is formed so as to discharge a fire extinguishing agent in a direction along a wall surface of a side wall portion forming the chamber.   3. The draft chamber fire extinguishing apparatus according to claim 1, further comprising a door closing means for closing the observation door by a supply pressure of the fire extinguisher supplied from the fire extinguisher supply means.

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