JPH07171229A - Automatic fire-extinguishing apparatus - Google Patents

Abstract

PURPOSE:To obtain an automatic fire-extinguishing apparatus wherein a fire sensor and an explosive are not used and a fire-extinguishing agent can be released surely by a simple structure. CONSTITUTION:This apparatus is provided with a bomb 40 filled with a fire- extinguishing agent, a differential pressure valve l mounted on an opening 41 of the bomb 40, a sealing-plate 20 for opening the differential pressure valve 1, a seal breaking nail 28 formed by facing to this sealing plate 20 for opening the valve and a thermosensitively moving member 32 detecting occurrence of a fire by itself and moving automatically the seal breaking nail 28 in the direction of the sealing plate 20 for opening the valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire extinguishing system using a fire extinguishing agent such as CO ₂ gas, and more specifically, a cylinder filled with the fire extinguishing agent is automatically opened to extinguish a fire when a fire occurs. The present invention relates to an automatic fire extinguishing device that releases a chemical.

[0002]

2. Description of the Related Art As an automatic fire extinguisher of this type, for example,
There is a device disclosed in Japanese Utility Model Publication No. 57-13094. In this invention, a fire detector detects the occurrence of a fire in a room and activates an electric control device, and based on this, a fire alarm is activated, and at the same time, the explosive powder in the pressurized gas generator is exploded to cause a difference. The pressure valve is opened to extinguish the fire by extinguishing the extinguishing agent from the pressure gas container through the differential pressure regulating valve and the conduit through the injection port into the room.

Further, in the invention disclosed in Japanese Utility Model Publication No. 3-14204, when a manual push button is pressed or a voltage is applied to a detonating electric heater based on a fire detection signal, gas is generated from the explosive. The gas pressure in the gas generation chamber rapidly increases, gas flows into the upper part of the cylinder to push the piston, and the sealing plate of the differential pressure regulating valve is ruptured by the rupturing claw. This reduces the gas pressure in the valve chamber, increasing the pressure from the cylinder side that is applied to the packing side of the mover, and the mover is pushed toward the sealing plate against the spring pressure of the spring, extinguishing the extinguishing gas. It is designed to be released.

[0004]

The above-described automatic fire extinguisher is provided for practical use by being installed in a place where sprinkler equipment or the like cannot be installed, for example, in a container or an electric machine room. However, if such an automatic fire extinguisher is installed in a place where people normally do not go in and out, such as a container, or in a place where fire extinguishing due to malfunction is disliked, the following problems occur. .

That is, all of the above-mentioned automatic fire extinguishing devices require a fire detector, and further, a signal line accompanying the fire detector,
Since the installation space for the power supply, the electric control device, etc. is required, the storage space for the container itself is reduced. Also,
If there is no power supply or the signal line is broken, it will not operate even if a fire occurs, and the explosive may deteriorate due to aging, weakening the explosive power or not exploding. .

Further, since no person can enter the container mounted in the cargo room, a manual push button is unnecessary. Furthermore, if something hits the manual push button, or if the fire extinguishing agent is accidentally released due to a malfunction of the fire detector, not only will the stored luggage be damaged, but there will be people inside the room or in the container. In this case, fire extinguishing gas may lead to oxygen deficiency, resulting in an unexpected disaster.

The present invention has been made to solve the above problems, and provides an automatic fire extinguisher capable of reliably releasing a fire extinguishing agent with a simple structure without using a fire detector or explosive. It is intended for.

[0008]

An automatic fire-extinguishing system according to the present invention comprises a cylinder filled with a fire extinguishing agent, a differential pressure valve attached to the opening of the cylinder, and a valve opening sealing plate for the differential pressure valve. ,
The valve-opening plate is provided with a breaking claw provided opposite to the valve-opening plate, and a thermal responsive element that automatically detects the occurrence of a fire and moves the breaking claw toward the valve-opening plate. It is a thing.

Further, a hot melt metal is used in place of the above-mentioned heat responsive element. Further, the above heat responsive element or heat molten metal is surrounded by a protective member having an outside air intake.

[0010]

The thermoresponsive member is normally in a compressed state, and the breaking pawl connected to the thermoresponsive member is located at a position apart from the valve opening sealing plate. When a fire occurs and the ambient temperature rises, the heat responsive member detects this and expands, moves the breaking claw, breaks the valve opening sealing plate, and opens the differential pressure valve. As a result, the fire extinguishing agent is extinguished from the cylinder via the differential pressure valve, and the fire is extinguished.

When a heat-melting metal is used instead of the heat responsive member, the heat-melting metal is always in a solid state, and the breaking claw held by this is at a position apart from the valve-opening sealing plate. When a fire occurs and the ambient temperature rises, the hot melt metal detects this and melts, moving the breaking claw and breaking the valve opening sealing plate,
Open the differential pressure valve. As a result, the fire extinguishing agent is extinguished by releasing the extinguishing agent from the cylinder through the differential pressure regulating valve.

By surrounding the heat responsive member or the hot melt metal with a protective member having an outside air inlet, it is possible to prevent people or objects from touching it.

[0013]

【Example】

Example 1. FIG. 1 is a sectional view of the first embodiment of the present invention. In the figure, reference numeral 1 is a differential pressure valve mounted in an opening 41 of a cylinder 40 filled with a fire extinguishing agent such as CO ₂ gas. Reference numeral 2 denotes a valve body, which has a male screw and a cylinder connecting portion 3 that is screwed to the opening 41 of the cylinder 40, and has a male screw, for example, a pipe line having a discharge nozzle at the end (not shown).
Has a discharge part 4 to which is connected and a female screw, and a safety valve 3 described later.
4 is connected to the safety valve connecting portion 5 and a cap nut 15 to be described later is connected to the cap nut connecting portion 6 and is formed in a substantially cross shape.

Reference numeral 7 denotes a first flow passage communicating from the center of the cylinder connecting portion 3 to the safety valve connecting portion 5. Reference numeral 8 is orthogonal to the first flow passage 7 and extends from the central portion of the discharging portion 4 to the cap nut connecting portion 6. In the communicating second flow path, the flow path 8 is expanded from the vicinity of the position where it intersects with the first flow path 7, and a cylinder 9 is formed. 10 is a sealing seat formed at the tip of the cylinder 9. Reference numeral 11 denotes a piston slidably accommodated in the cylinder 9. A packing 12 is attached to the tip of the piston, and a bottomed hole 13 is provided in the rear.

15 is a cap nut having an internal thread,
A flow passage 16 communicating with the cylinder 9, a screw hole 17 communicating with the flow passage 16, and a plurality of gas discharge holes 18 that are orthogonal to the flow passage 16 and open to the flow passage 16 are provided. The cap nut 15 is screwed into the cap nut connecting portion 6 via the gasket 19 and the sealing plate 20, compresses the spring 21 interposed between the bottom portion of the bottomed hole 13 and the gasket 19, and the piston 1
1 is pressed against a sealing seat 10 provided at the tip of the cylinder 9. The spring pressure P ₂ of the spring 21 is
P ₁ > P ₂ is selected for the filling pressure P ₁ of the extinguishing agent therein.

Reference numeral 22 is a guide member having a guide hole 23 in the center thereof, and a male screw provided at the tip end thereof is screwed into the screw hole 17 of the cap nut 15. Reference numeral 25 denotes a spring chamber as a protection member screwed into the male screw of the guide member 22, the hollow portion 27 and the breaking claw 28 are formed at the tip end, and a part thereof is inserted into the guide hole 23 of the guide member 22. A rupturable shaft 26 is provided. In addition, a part of the upper end of the breaking shaft 26 is cut out, and when the sealing plate 20 is broken, the fire extinguishing agent in the bottomed hole 13 is allowed to escape upward from this cutout.
29 is a vent hole communicating with the hollow portion 27. Reference numeral 30 denotes a movable spring seat made of a heat insulating material, which is fixed to one end of the breaking shaft 26. Reference numeral 31 denotes a fixed spring seat provided on a top plate of the spring chamber 25 and also serving as an outside air intake. Between
A spring 32 made of a heat responsive member such as a shape memory alloy that is compressed at a normal temperature and expands at a high temperature is interposed.
Reference numeral 33 denotes a plurality of outside air intakes provided on the peripheral wall of the spring chamber 25. In this spring chamber 25, the substrate and the top plate may be integrally formed by a plurality of columns, and a wire mesh may be stretched around the columns. In addition,
A safety valve 34 is screwed into the safety valve connecting portion 5 via a packing 35.

Next, the operation of the present invention configured as described above will be described. In this embodiment, as shown in FIG. 1, the spring 32 made of a shape memory alloy is always in a compressed state, and the breaking claw 28 of the breaking shaft 26 connected thereto is in the guide hole 23 of the guide member 22. It is located inside. In this embodiment, a case where this automatic fire extinguisher is installed in a container will be described.

On the other hand, the fire extinguishing agent (CO ₂ gas) in the cylinder 40 enters the bottomed hole 13 through the slight gap between the cylinder 9 and the piston 11 from the flow path 7 as shown by the arrow. Then, the piston 11 is pressed by the spring pressure P ₂ of the spring 21 and the pressure P _{1 of the} extinguishing agent by the force of P ₁ + P ₂ , the packing 12 of the piston 11 is crimped to the sealing seat 10, and the flow path 8 is formed. It blocks and prevents extinguishant from flowing out. The extinguishant also flows around the sealing seat 10 to urge the piston 11 toward the sealing plate 20.

Now, when a fire occurs in the container and the temperature inside the container rises, the temperature inside the spring chamber 25 also rises due to the outside air entering through the outside air intake 33. Spring chamber 25
When the inside temperature reaches a certain temperature (for example, 72 ° C.) or more, as shown in FIG. 2, the spring 32 made of a shape memory alloy senses this and expands, and is connected to the spring 32 via the movable spring seat 30. The breaking shaft 26 advances, and the breaking claw 28 breaks the sealing plate 20 and the gasket 19 and projects into the bottomed hole 13 of the piston 11.

As a result, the CO ₂ gas in the bottomed hole 13 of the piston 11 is discharged from the hollow portion 2 provided at the tip of the rupturable shaft 26.
7 passes through the vent hole 29 and is discharged to the outside from the gas discharge port 18, and the CO ₂ gas pressure in the bottomed hole 13 becomes substantially zero.
As described above, the pressure P ₁ of the extinguishing agent and the spring pressure P of the spring 21.
Since the ₂ a relation of P _1> P _2, the piston 11 is retracted by the pressure of the extinguishing agent from the cylinder 40 acting on its distal end, to open the flow path 8. As a result, the extinguishing agent in the cylinder 40 is pressure-fed from the flow paths 7 and 8 to the discharge nozzle through the pipes, and is discharged from the discharge nozzle to extinguish the fire in the container. When the extinguishing agent is exhausted, the piston 11 is pushed by the spring 21 and returns to the state shown in FIG. After releasing the extinguishant, the cap nut 15 is removed and the gasket 19
Also, if the sealing plate 20 is replaced, the cap nut 15 is attached again, and the extinguishing agent is press-fitted from the discharge part 4, it can be used again.

Example 2. FIG. 3 is a sectional view showing a main part of the second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 36 denotes a cylindrical metal container, which has a hole through which the rupturable shaft 26 is inserted at the center thereof, such as a hot-melt metal 37 such as solder.
Is filled in a solid state at room temperature, and is installed in the spring chamber 25 via the heat insulating material 38. It should be noted that fins 36a are provided on the outer periphery of the metal container 36 to enhance the heat transfer effect.
May be provided.

A flange portion 26a having a diameter slightly smaller than the inner diameter of the metal container 36 is provided at one end of the crushing shaft 26. The crushing shaft 26 is inserted into a hole of the hot-melt metal 37, and its tip is guided. Located in the guide hole 23 of the member 22. Reference numeral 39 is a tension spring interposed between the movable spring seat 30 and the fixed spring seat 31, and urges the breaking shaft 26 in the forward direction. However, since the collar portion 26a of the breaking shaft 26 hits the surface of the hot-melt metal 37 and cannot move further, the spring 39 is held in a compressed state. At this time, a gap g is formed between the inner circumference of the metal container 36 and the flange portion 26a of the crushing shaft 26.

Next, the operation of this embodiment will be described. In addition,
Since the action of the differential pressure valve itself is the same as that of the first embodiment, the rupturing action of the rupturing claw 28 will be described below. The heat-melting metal 37 and the spring 39 are normally in the state of FIG. 3, and the breaking claw 28 is located in the guide hole 23 of the guide member 22. Now, when a fire occurs in the container and the temperature inside the container rises, the temperature inside the spring chamber 25 also rises due to the outside air entering through the outside air intake 33. When the temperature in the spring chamber 25 reaches a certain temperature (for example, 72 ° C.) or higher, the hot-melt metal 37 in the metal container 36 senses this and starts melting. Then, the rupturing shaft 26 is moved forward by the urging force of the spring 39, and the hot-melted metal 37 which is melted along with this is extruded from the gap g between the metal container 36 and the flange portion 26a of the rupturing shaft 26 to the outside.
As shown in FIG. 4, the collar portion 26 a contacts the bottom portion of the metal container 36 and stops. In the meantime, the breaking claw 28 breaks the sealing plate 20 and the gasket 19 by the forward movement of the breaking shaft 26, and projects into the bottomed hole 13 of the piston 11.

[0024]

As described in detail above, the automatic fire extinguishing device according to the present invention detects the occurrence of a fire by the heat responsive member or the hot melt metal provided integrally with the differential pressure valve, and detects the fire. Was moved to open the valve by breaking the valve opening sealing plate and automatically extinguishing the fire extinguishing agent from the cylinder to extinguish the fire, so there is no need for a fire detector, signal line, power source, etc. Therefore, it is possible to increase the storage space of the container in which this automatic fire extinguisher is installed and the use space of the room. In addition, the power supply is not consumed and the signal line is not broken, so that the operation is not disabled.

Further, since no explosive is used as energy for moving the breaking claw, the structure is simple and the handling is easy. Further, since the manual push button is not provided and the heat responsive member is protected by the spring chamber, there is no possibility of accidentally touching it and causing malfunction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the first embodiment.

FIG. 3 is a cross-sectional view of essential parts of a second embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of the second embodiment.

[Explanation of symbols]

 1 Differential Pressure Valve 11 Piston 15 Cap Nut 18 Gas Release Port 20 Sealing Plate 25 Spring Chamber 26 Breaking Shaft 28 Breaking Claw 32 Shape Memory Alloy Spring 33 Outside Air Intake 37 Thermal Molten Metal 39 Spring

Claims (3)

[Claims] 1. A cylinder filled with a fire extinguishing agent, a differential pressure valve attached to an opening of the cylinder, a valve opening sealing plate of the differential pressure valve, and a valve opening sealing plate facing the valve opening sealing plate. An automatic fire extinguisher, comprising: a breaking claw, and a heat responsive member that automatically detects the occurrence of a fire and automatically moves the breaking claw toward a valve opening sealing plate. 2. The automatic fire extinguisher according to claim 1, wherein a heat-melting metal is used instead of the heat-responsive member. 3. The automatic fire extinguisher according to claim 1, wherein the heat responsive member or the hot melt metal is surrounded by a protective member having an outside air intake.