JPH0420458Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to an improvement of a fire extinguisher.

2. Description of the Related Art Fire extinguishers are generally configured so that the user can spray the extinguishing agent in the cylinder by manually opening the valve of the cylinder using a lever or the like. However, with this fire extinguisher, when a fire occurs, if the user does not operate the fire extinguisher quickly and appropriately, the extinguishing of the fire may be delayed.

In contrast, conventionally, a fire extinguisher body filled with extinguishing agent is housed in the main body of a lighting fixture, and a fire extinguishing agent injection nozzle is led out from this extinguisher body, and the external temperature rises on the nozzle tip side of the injection nozzle. A fire extinguisher has already been proposed that is equipped with a heat-sensitive element that operates in response to
issue).

Problems to be solved by the invention This invention uses a shape memory alloy actuating spring as a heat-sensitive element that operates as the outside temperature rises, and configures it into a more specific mechanism so that it can automatically operate as a single fire extinguisher. The objective is to provide a fire detection extinguisher.

Means for Solving the Problems The fire detection fire extinguisher according to the present invention includes a cylinder filled with extinguishing agent containing compressed gas, and a valve housing surrounding an opening formed in the lower surface of the cylinder. A fire extinguishing agent outflow port is provided on the lower surface of the valve casing, and a valve for blocking the fire extinguishing agent outflow port is provided inside the valve casing, and a compression spring that presses and supports this valve is attached to the cylinder. A housing for accommodating the valve operating mechanism is interposed between the valve housing and the lower face having an opening formed therein, and a housing for accommodating the valve operating mechanism is placed between the lower face of the valve housing provided at the extinguishing agent outlet and a compartment between the valve housing and the valve housing. Provided by extending to the lower side of the casing,
A fire extinguishing agent injection hose is provided leading out from the compartment of the housing, and a valve rod of the valve that protrudes downward from the fire extinguishing agent outlet provided in the valve housing through an insertion hole in the compartment is attached to the housing. It is located inside the body, and the lower end of the shaft of this valve rod is equipped with a shape memory alloy actuating spring, and the valve is moved away from the extinguishing agent outlet by the expansion movement of the actuating spring against the compression spring. It is constructed with a mechanism that sprays extinguishing agent from a spray hose.

Function This fire detection fire extinguisher is configured to use a shape memory alloy operating spring to move the valve in the valve housing away from the extinguishing agent outflow port and spray out the extinguishing agent filled in the cylinder from the injection hose. The injection hose is led out from the compartment of the housing that separates the lower part of the valve housing where the extinguishing agent outlet is provided, and the valve rod of the valve is inserted through the compartment from the valve housing to the inside of the housing. The fire extinguisher can be configured as a single fire extinguisher with a mechanism capable of automatically spouting extinguishing agent because it is operated by a shape memory alloy actuating spring and opens and closes the valve.

Embodiments The following is a description of embodiments shown in the accompanying drawings.

The fire extinguisher shown is a halon type fire extinguisher, and inside the main body case 1 is a CB liquid containing compressed gas or
A cylinder 3 filled with extinguishing agent 2 of FB ₂ is provided. This cylinder 3 is normally equipped with a valve 6 that closes the extinguishing agent outlet 5 by being spring-supported by a compression spring 4, and the extinguishing agent flows into the compartment 7 from the extinguishing agent outlet 5 which is opened by the valve 6. It is equipped so that the extinguishing agent 2 that flows out is spouted to the outside from a hose 8. An operating spring 10 is connected and attached to the valve 6 via a valve rod 9 which is arranged to protrude downward from the compartment 7. Its operating spring 10
For this purpose, one made of a shape memory alloy is used. This shape memory alloy is made by forming an alloy of titanium and nickel or brass containing aluminum into a spring shape and then heating it.The shape memory alloy shrinks at room temperature, but changes to the pre-memorized shape when the ambient temperature rises. It is formed so that it can rapidly expand. Its operating temperature is set to a temperature higher than the ambient temperature rise during normal rice cooking, and the operating spring 10 is formed so as not to perform heat-sensitive operation when unnecessary.

In addition to this basic mechanism, the following specific configuration is adopted.

An opening 3a is provided in the lower surface of the cylinder 3, and a valve housing 6a surrounding the opening 3a is provided at the lower part of the cylinder 3. Further, the above-mentioned extinguishing agent outflow port 5 is formed in the lower surface of the valve housing 6a, and a valve 6 is arranged inside the valve housing 6a so as to close the outflow port 5. A compression spring 4 that supports the valve 6 with a spring is interposed between the lower surface of the cylinder 3 in which the opening 3a is formed and the upper surface of the valve 6. The compartment 7 is formed of a housing 11 that accommodates the operating mechanism of the valve 6 in the lower surface of the valve housing 6a in which the extinguishing agent outlet 5 is provided. This housing 11 is extended to the lower side of the valve housing 6a, and from the compartment 7 formed by the housing 11, a fire extinguishing agent injection hose 8 is provided to be led out to the side. Further, the valve rod 9 of the valve 6 is located inside the housing 11 by protruding downward from the extinguishing agent outlet 5 through the insertion hole 7a of the compartment 7. An actuating spring 10 made of a shape memory alloy is installed inside the housing 11 as an actuating mechanism for the valve 6 by being attached to the lower end of the shaft of the valve rod 9.

In addition, in order to enable the actuation spring 10 to quickly sense a temperature rise on its peripheral surface, whisker-like fins 12 made of a material with good thermal conductivity are attached to the actuation spring 1.
It is preferable to connect it to each spiral thread of 0 and lead it out to the outside of the casing 11. Furthermore, by attaching a sealing material (not shown) with good slipperiness to the insertion hole 7a of the compartment 7 through which the valve rod 9 passes, the compartment 7 and the housing 11 in which the valve rod 9 is located can be closed. It is best to airtightly separate the inside.

In a fire detection extinguisher configured in this way, when the ambient temperature reaches a certain temperature when a fire occurs,
The rapid expansion of the shape memory alloy actuating spring 10 causes the valve 6 to move upwardly against the compression spring 4 and away from the extinguishing agent outlet 5. Due to the upward movement, the extinguishing agent outlet 5 is opened and the extinguishing agent 2 flows out into the compartment 7, so that the extinguishing agent 2 is jetted out from the injection hose 8. By arranging the end of the injection hose 8 toward the position where the fire is to be used, the fire can be automatically extinguished by the extinguishing agent that is spouted from the end of the hose as nonflammable gas. After extinguishing, the operating spring 10 returns to its original shape due to a fall in the ambient temperature, allowing the extinguishing agent outflow port 5 to be closed by the valve 6. New extinguishing agent 2 is released by opening and closing cylinder 3 by 13.
Reuse can be achieved by refilling the cylinder 3.

Effects of the invention As described above, according to the fire detection fire extinguisher according to the invention, it is possible to perform quick extinguishing by automatically injecting extinguishing agent, and it is also possible to extinguish fire quickly by automatically injecting extinguishing agent. It can be configured as a fire extinguisher that can automatically extinguish the fire even when the fire extinguisher is not present.

[Brief explanation of the drawing]

FIG. 1 is a sectional view illustrating the configuration of a fire detection extinguisher according to the present invention, and FIG. 2 is a sectional view illustrating the operating state of the fire extinguisher. 3...Cylinder, 3a...Cylinder opening, 4...
Compression spring, 5... Extinguishing agent outflow port, 6... Valve, 6a... Valve housing, 7... Compartment, 7a... Compartment insertion hole, 8... Extinguishing agent injection hose, 9 ... Valve rod, 10 ... Shape memory alloy actuation spring, 11 ... Housing, 12 ... Fin.

Claims (1)

[Claims for Utility Model Registration] (1) A cylinder is provided with a cylinder filled with extinguishing agent containing compressed gas, and a valve housing is provided at the bottom of the cylinder to surround an opening formed in the lower surface of the cylinder, and this valve housing In addition to providing an outlet for the extinguishing agent on the lower surface of the
A valve for blocking the outflow port of the extinguishing agent is provided inside the valve casing, and a compression spring that presses and supports this valve is interposed between the lower surface of the cylinder where the opening is formed, and A housing for accommodating a valve operating mechanism with a compartment separated from the lower face of the valve housing provided with an outlet for the agent is provided extending to the lower face side of the valve housing, and the agent is led out from the compartment of the housing. The valve is equipped with a fire extinguishing agent injection hose, and the valve rod of the valve, which protrudes downward from the fire extinguishing agent outlet provided in the valve casing through the insertion hole of the compartment, is located inside the casing. A mechanism in which a shape memory alloy actuating spring is installed at the lower end of the shaft of the rod, and the valve is moved away from the extinguishing agent outflow port by the expansion movement of the actuating spring against the compression spring, and the extinguishing agent is sprayed from the injection hose. A fire detection extinguisher characterized by comprising: (2) The fire detection fire extinguisher according to claim 1, wherein the operating spring is provided with fins having good thermal conductivity that lead out from a casing that accommodates the valve operating mechanism.