JP3065038U - Automatic opening device for fire extinguisher cylinders using the contraction force of shape memory alloy - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to blow out the fire extinguishing agent.
In a fire extinguisher using a high-pressure gas cylinder, in order to automatically open the sealing plate of the cylinder, a shape memory alloy was used, the rise in ambient temperature was sensed, and the temperature of the shape memory alloy reached a preset temperature. This is a system in which a fire extinguisher is automatically activated by utilizing a contracting force and a bending force. [Constitution] As shown in the drawing, the present invention is designed so that a drawn wire shape memory alloy protected by a metal pipe having good thermal conductivity contracts suddenly when it reaches a set temperature due to a rise in ambient temperature. Automatically extinguishes the fire by automatically pulling the lever with the contraction force, using the cutting shaft that is in close contact with the lever for the pushing force, and breaking and opening the sealing plate of the high-pressure cylinder with the pipe on the cone. The structure that spouts water is simple, enabling the manufacture of automatic fire extinguishers at low cost. Also, when the plate-shaped shape memory alloy reaches a preset temperature, it is processed into a bending characteristic, and the bending restoring force is used for pushing the cutting axis to break and release the sealing plate of the cylinder, This is a method that enables automation of fire extinguishers.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to the field of automatic fire extinguishing equipment that performs a fire extinguishing operation at an early stage of a fire by quickly detecting a rise in the surrounding temperature when a fire occurs and automatically operating a fire extinguisher. .

[0002]

[Prior art]

 Many pressurized fire extinguishers currently on the market are manually operated to open high-pressure gas cylinders and extinguish fires.Automatic fire extinguishers also have basically the same structure. As a means to open the sealing plate of the high-pressure gas cylinder built in the container of the container, a strong spring is compressed, its elasticity is released by melting of easily meltable solder or deformation of the shape memory alloy, and the impact force is used. There are many methods. As a result, these systems have problems that the structure is complicated, the production cost is expensive, the shape is large, and the heat-sensitive part is small, so that the operation accuracy, the mounting position of the fire extinguisher, and the angle are restricted. is there.

[0003]

[Problems to be solved by the invention]

 In the event of a fire, it is relatively easy to extinguish the fire by extinguishing it at the early stage of the fire.However, a fire can occur in places out of sight, unexpected places, and unexpected times. In many cases, the discovery is delayed and develops into a large fire. Also, even if you notice the occurrence of a fire, it is often difficult to operate the fire extinguisher properly if you are upset, or if you are an elderly person or a child. Particularly for building fires, the spread of automatic fire extinguishers that operate automatically regardless of human operation is desired. However, the automatic fire extinguishers currently on the market are complicated in structure, expensive and bulky, and there are many restrictions on the installation work and installation location. Accordingly, these problems have been solved, and the invention has been adopted for a small-sized fire extinguisher with a simple structure at a low cost, thereby enabling the production of an automatic fire extinguisher. In addition, it is a device that can be changed to an automatic fire extinguisher by partially modifying a manual fire extinguisher that is currently commercially available.

[0004]

[Means for Solving the Problems]

 The present invention utilizes a contracting force of a drawn shape memory alloy set to a target temperature at which operation is started in advance, and a stroke and a force exerted when a plate-shaped shape memory alloy bends, using a high-pressure gas cylinder. The structure is simple, inexpensive, and can be manufactured by using a method that breaks the sealing plate of the cylinder and opens the gas by using the off-axis to open the sealing plate of the cylinder as a pushing force. This system is not limited to fire extinguishers, but can be widely used for various types of fire extinguishers.

[0005]

[Action]

 The method of releasing the gas in a non-combustible high-pressure gas cylinder is often used to squirt or diffuse the extinguishing agent from a fire extinguisher. For the purpose of the means to push the cylinder enclosing plate through the cutting shaft with the cut small diameter steel pipe, the contracting force of the drawn shape memory alloy and the plate shape memory alloy Utilizing the bending stroke and force of When using a drawn wire shape memory alloy, when the shape memory alloy reaches the set temperature, it can be shrunk by about 5%. Since a length of 10 mm can be secured, a sufficient stroke can be secured for pushing the cutting shaft and opening the sealing plate of the cylinder. If a wire with a diameter of about 1 mm is used, the contracting force is the same as when the shaft is pushed through a lever or when the shaft is pushed down directly with a drawn shape memory alloy. The force to break and open the sealing plate can be sufficiently secured. When the bending force of the plate-shaped shape memory alloy is used as the force for directly pushing the cutting axis, a width of 15 mm, a thickness of 2 mm, and a length of 30 mm to 50 mm depends on the bending angle. By using this, the pressure for opening the sealing plate and the required stroke can be secured.

[0006]

【Example】

 Hereinafter, embodiments will be described with reference to the accompanying drawings. 1 is a drawn shape memory alloy, 2 is a metal pipe having a high thermal conductivity for protecting the shape memory alloy, 3 is a tightening screw for connecting the shape memory alloy to the lever, and 4 is a shape memory alloy. Tightening screw for fixing the shape memory alloy to the fire extinguisher body, 5 for fixing the shape memory alloy to the fire extinguisher body, 6 for fixing the protective pipe to the fire extinguisher body, and 7 for the drawn shape memory alloy. A lever that transmits the force of contraction and pulling to the cutting shaft 10, a bracket 8 supports the hinge portion of the lever, and is fixed to the cylinder portion of the fire extinguisher main body, and 9 is a hinge that connects the lever 7 and the support bracket 8. Reference numeral 10 denotes a cutting shaft that pushes down the opening pipe of the cylinder cut at an acute angle. 11 denotes a spring for bringing the cutting shaft into close contact with the lever. 12 supports the cutting shaft 10 to prevent leakage of high-pressure gas. Cylinder, 13 is sharp A pipe with a conical shape, 14 is a sealing plate for a high-pressure gas cylinder, 15 is a screw-type fixing bracket that connects the cylinder part to the container of the fire extinguisher, and 16 is a metal fitting used during transportation or during installation work. A pin 17 for preventing malfunction is a bracket for supporting the lever 7 and the pin 16. With the above configuration, when a fire occurs, the wire-shaped shape memory alloy senses a rise in the surrounding temperature and utilizes the property of suddenly shrinking when it reaches a preset temperature. By pulling the lever, a steel pipe sharply cut through a cutting shaft breaks the sealing plate of the cylinder, opens it, and automatically activates the fire extinguisher. Therefore, if this method is used, a manual fire extinguisher can be provided with the function of an automatic fire extinguisher that automatically operates simply by changing the structure of the handle and lever of the manual fire extinguisher.

[0007] By adopting this method, it is possible to produce an automatic fire extinguisher, which has recently been increasing in demand, at a low cost, and to change the function of the automatic fire extinguisher to the function of the automatic fire extinguisher without changing the basic structure of the manual fire extinguisher. I can do it.

[0008] A structure that can variably set the direction of the nozzle for ejecting the fire extinguishing agent can make it possible to prevent fire at a desired location, and by expanding the diffusion angle of the nozzle, the initial fire stage It is possible to carry out fire fighting activities in a relatively wide range.

[0009] By using an automatic fire extinguisher, it is possible to install the unit on the ceiling as if hanging on a wall that does not occupy the floor area. If the siphon is set to the lower part of the heat sensitive part side, it can be installed vertically or horizontally. Enables installation.

If the material of the protection pin 16 is made of a hard plastic or the like and the pin is destroyed by the contraction force of the shape memory alloy, the contraction force is stored, and the spring effect of the wire drawing itself is used. It is possible to quickly bring out the effect of opening the sealing plate.

By installing the automatic opening device having the structure shown in FIG. 2 outside the container of the fire extinguisher, it can be used not only for powder fire extinguisher but also for multi-type automatic fire extinguisher such as liquid fire extinguisher and foam fire extinguisher. Enable.

As shown in FIGS. 3 and 4, when the temperature reaches a preset temperature, the restoring force of the plate-shaped shape memory alloy that has been processed to be bent is used to directly push the cutting axis to insert the sealing plate. An opening method is also possible.

[Effect of the invention]

 As described above, the following effects can be obtained by utilizing the characteristics of the shape memory alloy. (B) In the event of a fire, an automatic fire extinguisher that operates regardless of human operation and performs fire extinguishing quickly during the initial fire stage can be produced with a simple structure and at low cost. (B) This is a system that enables the production of manual fire extinguishers, which are currently commercially available, to be changed to automatic fire extinguishers at low cost without changing the basic structure. (C) Not only for pressurized fire extinguishers, but also for multi-method fire extinguishers to enable automation. (D) A common structure can be used regardless of the capacity and shape of the fire extinguisher, depending on the purpose of use and the installation location. (E) The fire extinguisher can be compactly manufactured and used as a fire extinguisher with a mechanism that is attached to the outside, in addition to the system in which the cylinder is built in the fire extinguisher container. (F) By selecting the operating temperature of the shape memory alloy, it is possible to manufacture a fire extinguisher that automatically operates at that temperature according to the purpose and location. (G) Depending on the place and purpose of use, it can be mounted on walls, ceilings, etc. without occupying floor space. (H) By adopting a structure that can select the shape and direction of the nozzle that ejects the fire extinguishing agent, the area covered in the desired direction can be determined. (I) As an automatic fire extinguisher that responds to stove fires, which is the most common cause of building fires, it is possible to produce small and lightweight automatic fire extinguishers with high fire extinguishing ability. (N) By setting the operating temperature lower than that of the sprinkler and setting it to operate early, a large amount of demand can be expected in hotel private rooms and warehouses.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an automatic fire extinguisher utilizing the contraction force of a drawn shape memory alloy according to the present invention.

FIG. 2 is an automatic opening device for a high-pressure gas cylinder which is provided outside the fire extinguisher main body and uses the contraction force of a drawn wire shape memory alloy.

FIG. 3 shows a method of automatically opening an enclosing plate of a high-pressure gas cylinder at a set temperature of a plate-shaped shape memory alloy by using a restoring bending force and a stroke thereof.

FIG. 4 shows a state in which the plate-shaped shape memory alloy shown in FIG. 3 is bent and pushes a cutting axis when the temperature reaches a set temperature.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 wire drawn shape memory alloy 2 protective pipe 3 screw fixing wire drawn to lever 4 screw fixing wire drawn to lower metal fitting 5 metal fitting fixing wire drawn and protective pipe to fire extinguisher 6 metal fitting similar to previous item 7 Lever 8 Metal fitting for supporting the hinge side of the lever 9 Hinge 10 Off-axis 11 Spring 12 Cylinder block 13 Pipe-shaped cone for breaking the sealing plate 14 Cylinder sealing plate 15 Screw-in cap for fixing the cylinder boolock to the body 16 Incorrect Operation prevention pin 17 Pin support bracket 18 High-pressure gas cylinder 19 Gas siphon 20 Siphon 21 Fire extinguisher ejection pipe 22 Fire extinguisher container 23 Backflow prevention tube 24 Fire extinguisher 25 Wire-shaped shape memory alloy 26 Wire fixing screw 27 Wire extension Wire fixing screw 28 Lever 29 Hinge 30 Hardware for fixing hinge 31 Blocking mechanism for opening C 32 Off-axis 33 Spring 34 High-pressure gas cylinder 35 High-pressure gas take-out pipe 36 Mounting base for opening device 37 Cross-section of bent base 38 Plate-shaped shape memory alloy 39 Shape-memory alloy support bracket 40 Off-axis 41 Spring 42 Cylinder block 43 A metal fitting for connecting the support metal to the cylinder block 38a A state where the plate-shaped shape memory alloy is bent 40a A state where the cutting shaft is pushed in 41a A state where the spring is compressed

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[Procedure amendment]

[Submission date] July 14, 1999 (1999.7.1)
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (2)

[Utility model registration claims] When a fire occurs, an increase in temperature around the fire is sensed by a drawn shape memory alloy set in advance according to a target temperature, and the temperature of the shape memory alloy is set to a set temperature. When the wire reaches the shape, the drawn wire shape memory alloy is made of a material that shrinks, and the shrinking force is pulled toward the lever, one of which is fixed by a hinge, to open a high-pressure cylinder that is in close contact with the lever. This device is characterized by automatically breaking and opening the sealing plate of the cylinder by pushing the cutting shaft. Further, depending on the structure of the opening mechanism, a method of directly transmitting the contracting force of the drawn shape memory alloy to the cutting shaft for opening the sealing plate of the cylinder and pushing the cutting shaft can be used. 2. A plate-shaped shape memory alloy, which is set in advance according to a target temperature in the same manner as in claim 1, stores the shape memory alloy so as to be suddenly bent when the peripheral temperature rises and reaches the set temperature. Using the stroke and force of the bent portion of the plate-shaped shape memory alloy as the force for pushing the cutting axis,
This method is characterized by breaking and opening the sealing plate of the cylinder.