JP2008036308A - Injection port of automatic fire extinguishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection port of an automatic fire extinguishing device preventing intrusion of steam of solvent, fat and the like into the injection port, and eliminating malfunction due to thermal expansion of air in the injection port and detachment of components when releasing fire extinguishant. <P>SOLUTION: This injection port of the automatic fire extinguishing device, when a sensor part senses a fire, automatically opening a fire extinguishant container and releasing the fire extinguishant from the injection port to a fire extinguishing target area is provided with a piston valve at the tip of the injection port for regularly closing the injection port and capable of opening the injection port by a pressure caused by opening the fire extinguishant. Further, the circumference of the piston valve is provided with a sealing part for preventing the intrusion of gas in ambient environment into the injection port, and the circumference of the piston valve inside the injection port of the sealing part has a retaining part for preventing the operation of the piston valve by the expansion of the gas in the injection port. Preferably, a stopper part is provided for preventing the falling of the piston valve from the injection port when opening the injection port. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an injection port of an automatic fire extinguisher that can be opened and closed by a piston valve, and in particular, prevents an intrusion of a gas containing a solvent or the like used in a fire extinguishing target section, and an error of the piston valve due to the expansion of the gas in the injection port. The present invention relates to an injection port of an automatic fire extinguishing apparatus that prevents operation.

  The automatic fire extinguisher detects a fire that occurs in the fire extinguishing target section by a heat / flame / smoke sensing unit, automatically opens the fire extinguishing chemical container provided in the automatic fire extinguishing device, and extinguishes the fire extinguishing chemical. It has a structure in which it is discharged from an injection port attached to the compartment.

  In the fire extinguishing target section to which the injection port of the automatic fire extinguishing device is attached, an environment in which various volatile or corrosive solvents are used, such as semiconductor manufacturing equipment, or heated oil vapor like a kitchen is generated. There is an environment. In these environments, solvents and oils and fats evaporate and enter the interior from the injection port, damaging each device of the automatic fire extinguishing device, causing problems such as accidental release and leakage of solvent to other areas than the fire extinguishing target section. Sometimes.

  As means for solving such a problem, there has been proposed an injection port of an automatic fire extinguishing device in which a nozzle cap that does not drop in a normal state but easily falls by the pressure at the time of opening a fire extinguishing chemical container is attached to the injection nozzle (Patent Document) 1).

  However, the fire extinguishing target section to which the injection port is attached is often an environment heated to a high temperature, and thus is exposed to a sudden temperature change, so that internal pressure is generated due to the thermal expansion of the air in the injection port, The nozzle cap easily falls off. Further, when the fire extinguishing agent is opened, the nozzle cap jumps out together with the extinguishing agent, resulting in a secondary disaster such as damaging the equipment in the fire extinguishing target section or entering the solvent circulation part.

JP-A-9-140824

  The present invention was devised in view of the current state of the prior art, and its purpose is to a fire-extinguishing port using a solvent, a fat or the like in a fire extinguishing target section using a solvent, a fat or the like exposed to a rapid temperature change. It is an object of the present invention to provide an injection port for an automatic fire extinguishing device that can prevent intrusion of air and that does not cause malfunction during thermal expansion of air in the injection port and detachment of components during discharge of a fire extinguishing agent.

  The present invention provides an automatic fire extinguisher jet port that automatically opens a fire extinguishing chemical container when a sensing unit detects a fire and releases the fire extinguishing chemical from the jet port to a fire extinguishing target section. It is equipped with a piston valve that can normally close the injection port and open the injection port with the pressure of opening the fire-extinguishing agent, and seals around the piston valve to prevent the entry of ambient gas into the injection port In addition, the injection port of the automatic fire extinguishing device is characterized in that a holding portion is provided around the piston valve inside the injection port from the sealing unit in order to prevent the piston valve from operating due to gas expansion in the injection port. It is.

  In a preferred aspect of the injection port of the automatic fire extinguishing apparatus of the present invention, a stopper portion is provided for preventing the piston valve from dropping from the injection port when the piston valve opens the injection port.

  The injection port of the automatic fire extinguishing apparatus according to the present invention is configured such that the injection port is opened and closed by a piston valve, a sealing portion for preventing intrusion of ambient gas into the injection port, Since a holding part is provided to prevent the piston valve from operating due to the expansion of the gas, there is no damage or destruction of the equipment due to the intrusion of gas containing solvent etc. into the injection port, and it also accompanies temperature changes in the surrounding environment No malfunction of the piston valve due to the expansion of the gas in the injection port. In addition, since the injection port of the automatic fire extinguishing apparatus of the present invention is provided with a stopper portion for preventing the piston valve from dropping off during operation of the piston valve, damage to peripheral equipment due to the fall of the piston valve or dropout to the circulation equipment There is no intrusion of parts.

  Although three examples are shown below as a suitable embodiment of the injection opening of the automatic fire extinguishing apparatus of this invention, this invention is not limited to these. In addition, the automatic fire extinguishing apparatus targeted by the present invention is a type that automatically opens the fire extinguishing agent container and releases the extinguishing agent from the ejection port to the fire extinguishing target section when the sensing unit detects a fire, Details thereof are known to those skilled in the art and will not be described here.

First Embodiment FIG. 1 is an exploded sectional view of an injection port of an automatic fire extinguishing apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view of assembled parts, and FIG. 3 is a piston valve of the injection port of FIG. It is sectional drawing at the time of an action | operation.

  In the figure, 1 is an injection port, 2 is a piston valve, and 3 is a valve stopper. The piston valve 2 is provided with a groove 8 for a sealing material and a groove 9 for a holding material, and each groove is sealed with rubber. The O ring 6 for rubber and the O ring 7 for holding rubber are attached in close contact.

  When the piston valve 2 is assembled in the injection port 1 as shown in FIG. 2 (injection port closed state), the rubber sealing O-ring 6 is formed on the outer periphery of the sealing material groove 8 and the inner wall of the injection port 1. Compressed by the linear portion 5 positioned at the position, a sealing portion is formed by a repulsive force due to its elastic deformation, and the intrusion of a gas containing a solvent or the like into the inside of the injection port 1 is prevented.

  The rubber holding O-ring 7 is compressed once by the outer periphery of the holding material groove 9 and the linear portion 5 located on the inner wall of the injection port 1 when the piston valve 2 is assembled into the injection port 1. In the state where the injection port 1 is completely assembled, the holding O-ring 7 is released from the compression when the holding O-ring 7 passes through the straight portion 5 and reaches the holding step 4 and returns to its original size. In this state, the holding O-ring 7 is caught by the holding step 4, and the piston valve 2 can not be easily operated even when pressure due to the thermal expansion of the gas inside the injection port is applied. .

  When the detection unit in the automatic fire extinguishing device detects a fire and the fire extinguishing agent container is automatically opened, the internal pressure of the injection port 1 rises at a stretch. The piston valve 2 is pushed downward by this pressure, the holding O-ring 7 is elastically deformed, and operates by getting over the holding step 4 on the inner wall of the injection port 1.

  The actuated piston valve 2 is pushed down as it is by the discharge pressure of the fire extinguishing agent to open the injection port 1. The piston valve 2 is provided with an overhanging portion 10, and this overhanging portion 10 is provided in the valve stopper 3. The piston valve 2 is prevented from detaching from the injection port 1 by colliding with the restrained stop portion 11. When the fire-extinguishing agent is discharged from the injection port 1, the fire-extinguishing agent is discharged through the discharge opening 12 provided in the valve stopper 3 to the fire extinguishing target section.

  The sealing O-ring 6 is not limited to rubber or elastomer resin, and various materials can be used. For example, the O-ring 6 is solvent resistant depending on the type and temperature of the components contained in the gas surrounding the fire extinguishing target section. Further, an elastic material having chemical resistance and heat resistance can be appropriately selected. In addition to the O-ring, a V-ring or a shape molded into an arbitrary shape can be adopted as the shape of the sealing material. Similarly, the holding O-ring 7 is not limited to a rubber or elastomeric elastic material or the shape of an O-ring, and the object of the present invention can be achieved by providing a movable portion using spring steel, a spring, or the like. .

  In this embodiment, the release openings 12 provided in the valve stopper 3 are provided in two slits on the left and right sides. However, as long as the fire-extinguishing agent can be effectively released, the shape and number of the openings are provided. Can be set arbitrarily.

Second Embodiment FIG. 4 is an exploded cross-sectional view of an injection port of an automatic fire extinguishing apparatus according to a second embodiment of the present invention, FIG. 5 is a cross-sectional view of the assembled parts, and FIG. It is sectional drawing at the time of an action | operation.

  In the first embodiment, the overhanging portion 10 of the piston valve 2 and the restraining portion 11 of the valve stopper 3 constituting the mechanism for preventing the piston valve 2 from falling off are provided outside the injection port 1. In this second embodiment, The valve stopper 3 does not exist, and instead, the injection port 1 is divided into two component parts 1 ′, 1 ″ and a stop 11 is provided inside the part 1 ″, and the injection port 1 of the piston valve 2 is provided in the injection port 1. A protruding portion 10 is provided at the portion to be inserted to form a stopper portion to prevent the piston valve 2 from falling off the injection port 1. Since the operation of other components is the same as that of the first embodiment, further description is omitted.

Third Embodiment FIG. 7 is an exploded cross-sectional view of an injection port of an automatic fire extinguishing apparatus according to a third embodiment of the present invention, FIG. 8 is a cross-sectional view in a state where parts are assembled, and FIG. It is sectional drawing at the time of an action | operation.

  In the second embodiment, the sealing O-ring 6 and the holding O-ring 7 are provided adjacent to each other. However, in this third embodiment, the sealing O-ring 6 and the holding O-ring 7 are connected to the piston valve 2. It is changed so as to be provided separately on each of the lower end and the upper end. Since the operation of other components is the same as in the first embodiment and the second embodiment, further explanation is omitted.

  The injection port of the automatic fire extinguishing apparatus of the present invention can always operate normally even in an environment where the fire extinguishing target section uses a solvent, fats and oils, or an environment where the temperature changes rapidly. It is extremely useful in an automatic fire extinguishing apparatus installed in a processing machine installation area such as a semiconductor device to be used or a kitchen in which heated oil vapor is generated.

The exploded sectional view of the injection opening of the automatic fire extinguishing apparatus of the first embodiment of the present invention is shown. Sectional drawing of the state which assembled each component of the 1st embodiment of this invention is shown. Sectional drawing at the time of piston valve action | operation of the injection nozzle of FIG. 2 is shown. The exploded sectional view of the injection mouth of the automatic fire extinguishing apparatus of the second embodiment of the present invention is shown. Sectional drawing of the state which assembled each component of the 2nd embodiment of this invention is shown. Sectional drawing at the time of piston valve action | operation of the injection nozzle of FIG. 5 is shown. The exploded sectional view of the injection opening of the automatic fire extinguishing apparatus of the third embodiment of the present invention is shown. Sectional drawing of the state which assembled each component of the 3rd embodiment of this invention is shown. Sectional drawing at the time of the piston valve action | operation of the injection nozzle of FIG. 8 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection port 1 'Injection port component 1 "Injection port component 2 Piston valve 3 Valve stopper 4 Holding step 5 Straight part 6 Sealing O-ring 7 Holding O-ring 8 Sealing groove 9 Holding Groove for material 10 Overhang portion 11 Stop portion 12 Release opening

Claims (2)

  An automatic fire extinguishing device that automatically opens the fire extinguishing agent container and releases the fire extinguishing agent from the jetting port to the fire extinguishing target when the sensor detects a fire. It is equipped with a piston valve that can close the mouth and open the injection port with the pressure of opening the fire-extinguishing agent, and is provided with a sealing portion around the piston valve to prevent intrusion of ambient gas into the injection port. Furthermore, in order to prevent the operation of the piston valve due to the expansion of gas in the injection port, a holding part is provided around the piston valve inside the injection port from the sealing part.   The injection port of an automatic fire extinguishing apparatus according to claim 1, further comprising a stopper portion for preventing the piston valve from dropping from the injection port when the piston valve opens the injection port.

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