JPH0626618B2 - Fire extinguisher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fire extinguisher that automatically ejects a fire extinguishing agent when an impact is applied.

[Prior Art] For example, a vehicle carrying a nuclear reactor fuel is required to be equipped with a fire extinguisher.

Therefore, generally, a small portable powder fire extinguisher or the like is loaded on the vehicle. In this fire extinguisher, a powder fire extinguisher is filled in a cylinder, and when the safety plug is pulled out and the lever is firmly grasped, the powder fire extinguisher is injected by the pressure of compressed air.

[Problems to be Solved by the Invention] In the case of a vehicle loaded with the above-mentioned nuclear reactor fuel, when a strong impact is applied due to a collision or the like and a vehicle fire occurs, a fire extinguisher may be operated to extinguish the fire. There is an urgent need.

However, since the conventional fire extinguisher is operated by a person and used for fire extinguishing work, there is a possibility that an emergency response may not necessarily be taken.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fire extinguisher that is automatically activated when an impact is applied.

[Means for Solving the Problems] The present invention urges a spherical body for opening and closing a passage provided in a lid of a cylinder of a fire extinguisher in a closing direction by a spring,
The action of the spring for biasing this in the opening direction is regulated by the ball. Further, the balls are formed of a heat-meltable material.

[Operation] When acceleration greater than a predetermined magnitude is applied to the fire extinguisher, or when it exceeds a predetermined temperature, the regulation is released by the ball and the sphere moves, the passage is opened and the fire extinguishing agent is ejected. .

[Embodiment] An embodiment of the present invention will be described below with reference to FIG.

In the figure, reference numeral 1 is a cylinder, 2 is a powder extinguishing agent (extinguishing agent) filled in the cylinder 1, and 3 is compressed air for pressing the powder extinguishing agent. At the center of the cylinder 1, a pipe 4 is installed vertically. The lower end of the pipe 4 is inserted into the bottom of the powder fire extinguishing agent 2, and the upper end of the pipe 4 is fixed to the center of a lid 5 that closes the opening of the cylinder 1. The lid 5 is fixed to the opening of the cylinder 1 by a nut 6, and an ejection port 6 coaxial with the pipe 4 is formed in the lid 5 and an ejection port that is orthogonal to the ejection port 6 and communicates with the outside. An outlet 7 is formed. A sphere 8 that seals the lower end peripheral portion of the jet port 6 with a spring force is provided at the connecting portion between the jet port 6 and the pipe 4, and a check valve (valve) that blocks the flow from inside to outside.
9 are configured. Further, the lid body 5 is provided with a valve opening mechanism 10 that opens the check valve 9 in the previous period when acceleration of a predetermined value or more is applied to the fire extinguisher itself.

The valve opening mechanism 10 will be described below. The lower end surface of the rod A having a round bar shape is in contact with the center of the upper surface of the spherical body 8. The upper end surface of the rod A is formed into a convex spherical surface,
It protrudes to the upper surface of the lid 5 through a sliding portion 6a that seals the peripheral surface of the rod A with an O-ring. The central portion of the lower side surface of the arm 11 is in contact with the upper end surface of the rod A. The arm 11 has a support 1 whose base end is provided on the upper surface of the lid 5.
It is rotatably supported by two pins 12a, and its tip is bifurcated. The rod B and the upper bulging portion B ₁ are locked between the bifurcated portions. The rod B is formed in a round bar shape, and a lower bulge portion B ₂ is formed at the lower end portion thereof, and a concave spherical surface matching a ball described later is formed on the lower end surface of the lower bulge portion B _2. Has been formed. The lower end portion of this rod B is inserted into the hole 13 in the overhang portion of the upper portion of the lid body 5, and the lower bulge portion B _{2 has the} spring 1
4 is urged downward. At the bottom of rod B,
A ball 16 is provided between the seat 15 and the seat 15. Ball 1
6 is made of a low temperature molten metal having a predetermined mass, and receives a predetermined spring force by a spring 14 so that the rod B
It is held between the seat 15 and the seat 15. This ball 16
When an acceleration of a predetermined value or more is applied to the fire extinguisher, the ball 16 itself is also subjected to the acceleration of the identification degree, and falls from between the seat 15 and the rod B. Further, when the fire extinguisher is exposed to an atmosphere having a temperature equal to or higher than a predetermined temperature, the fire extinguisher melts and flows down from between the seat 15 and the rod B.

In the figure, H is a hose connected to the ejection port 7.

When a lateral acceleration of a predetermined value or more is applied to the fire extinguisher having the above structure, the ball 16 sandwiched between the rod B and the seat 15 falls. Then, the rod B is urged by the spring 14 to move downward, and the arm 11 rotates clockwise around the pin 12a. At this time, the rod A is the arm 1
It is pushed by the lower side surface of 1 and moves downward to push down the sphere 8. Then, the powder fire extinguishing agent 2 in the cylinder 1 is communicated with the outside through the pipe 4, the check valve 9, the ejection ports 6 and 7, and the hose H, and is ejected from the hose H by the compressed air 3. Further, even when the fire extinguisher is exposed to an atmosphere of a predetermined temperature or higher, the balls 16 melt and flow down from between the seat 15 and the rod B, and the powder fire extinguishing agent 2 is ejected in the same manner as above.

Therefore, if the fire extinguisher having the above-mentioned configuration is installed in a place where a fire is expected to occur, such as an engine of a vehicle or a fuel tank, the powder extinguishing agent 2 is automatically ejected by sensing the acceleration at the time of collision. It is possible to prevent a fire at the time of a collision.

Further, even if a fire occurs in the stopped state, the balls 16 melt due to the temperature rise due to the fire, and the powder fire extinguishing agent 2 is automatically ejected, so that the fire can be extinguished in the very early stages.

In the above embodiment, the powder fire extinguishing agent 2 in the cylinder 1 is configured to be pressurized with air, but it may be pressurized with a gas such as carbon dioxide gas. The ball 16 is made of a low temperature molten metal, but may be made of a material such as plastic as long as it can be melted at a predetermined temperature.

[Effects of the Invention] As described above, according to the present invention, when the ball moves due to the acceleration at the time of collision of the vehicle or the like, the restraint on the spring is lost, so the sphere moves by the bias of the spring and the passage is opened. Since the fire extinguishing agent is automatically ejected, if the fire extinguishing agent is installed in a place where a fire is expected to occur, such as an engine, a fuel tank, etc., a fire at the time of a collision can be prevented. Further, since a mechanism for detecting a collision, and a sphere or the like for opening and closing the passage of the extinguishant based on this are provided on the lid of the fire extinguisher, this automatic mechanism can be integrally configured with the fire extinguisher, Moreover, the occurrence of impact can be reliably detected at the location where the fire extinguisher is installed. Further, when the balls are made of a heat-meltable material, there is an effect that they can operate reliably even when a fire occurs without being accompanied by impact.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention. 1 ... cylinder, 2 ... powder fire extinguishing agent, 9 ... check valve, 10 ... valve opening mechanism.

Claims (2)

[Claims] 1. A cylinder containing a fire extinguishing agent, a lid inserted into an opening of the cylinder, a passage provided in the lid for communicating the inside and outside of the cylinder, and a passage inside the passage. A sphere that is movably provided in the axial direction to open and close the passage, a first spring that urges the sphere to close the passage, and a sphere that is provided along the moving direction of the sphere and has one end contacting the sphere. And a rod having the other end protruding outside the lid, a second spring that applies an elastic force to the rod to move the sphere in the opening direction, and a member connected to the second spring. A fire extinguisher comprising a ball which is sandwiched between the lid and the second spring to hold the second spring in an elastically deformed state. 2. A cylinder containing a fire extinguishing agent, a lid inserted into an opening of the cylinder, a passage provided in the lid for communicating the inside and outside of the cylinder, and a passage inside the passage. A sphere that is movably provided in the axial direction to open and close the passage, a first spring that urges the sphere to close the passage, and a sphere that is provided along the moving direction of the sphere and has one end contacting the sphere. And a rod having the other end protruding outside the lid, a second spring that applies an elastic force to the rod to move the sphere in the opening direction, and a member connected to the second spring. A ball which is sandwiched between the lid and the second spring to hold the second spring in an elastically deformed state, and the ball is made of a material that melts when the temperature rises above a predetermined temperature. Fire extinguisher.