JP3801684B2 - Fire extinguishing device start-up mechanism and fire extinguishing device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an activation mechanism for remote activation and automatic activation of a fire extinguisher such as a fire extinguisher, and a fire extinguishing apparatus using such a mechanism.
[0002]
[Prior art]
Fire extinguishing device, for example, a pipe connected to the external injection port of a valve case fixed to the upper end of a pressurized fire extinguishing agent storage container installed at a predetermined location, led to a fire extinguishing monitoring area, and provided with an injection nozzle at its tip Is configured to inject a fire-extinguishing agent from the injection nozzle by opening a communication path in the valve case that communicates the inside of the container and the external injection port when the apparatus is activated. As a method for starting such an apparatus, for example, a valve case in which a valve closing the communication path is pressed and moved using a spring or solenoid, acting on a gas generating agent with an explosive called an initiator, is used. Some of them actuate an internal piston to push and move the valve.
[0003]
An example of a start-up mechanism for extinguishing a fire extinguishing agent using an initiator is shown as a conventional example. As shown in FIG. Install the valve case (3) with 2). The valve (2) is normally pushed upward by a valve spring (4) to close the drug ejection port (5) of the container (1). In addition, a piston (7) that can move up and down is disposed in a cylinder chamber (6) above the valve (2), and further, a space communicating with the cylinder upper chamber (8) above the piston (7) is formed. A gas generating agent (10) such as sodium azide (NaN ₃ ) and an initiator (11) acting on the gas generating agent were provided in the space of the attenuator receiver (9). In the drawing, (12) is an upper lid for sealing the cylinder upper chamber (8).
[0004]
According to such an activation mechanism, when the fire extinguishing agent is to be ejected to the outside, the initiator (11) is actuated by electric drive, and for example, nitrogen gas is rapidly generated by the gas generating agent (10). The piston (7) is pushed down against the pressure in the medicine container (1) and the elastic force of the valve spring (4) by the expansion force of the gas, and the medicine outlet (5) is opened to remove the medicine inside the container. It can radiate | emit from an external injection port (14) through the communicating path (13) in a valve case (3).
The once generated gas is filled in the sealed cylinder upper chamber (8) and the inside of the cylinder upper chamber (8) is always kept at a high pressure, so that the piston (7) is held at the lower limit position and the drug jet (5 ) Is always open.
[0005]
[Problems to be solved by the invention]
However, the start-up mechanism using the initiator is dangerous because the gunpowder is handled, and the apparatus itself is large because of the initiator and the gas generating agent, and the number of parts is large and the structure is complicated. Therefore, a compact starter that is easy to handle has been desired.
[0006]
[Means for Solving the Problems]
As a result of various studies in view of such problems, the present invention proposes an activation mechanism that improves these.
That is, the activation mechanism for a fire extinguisher of the present invention has a valve that closes the communication path that connects the external jet port and the inside of the fire extinguishing agent storage container, and further includes a piston member that opens the communication path by pressing the valve. In the start-up mechanism for a fire extinguisher provided, a non-explosive that generates heat by heating is provided in a cylinder chamber behind the piston, and a pin that is biased to protrude in the radial direction of the piston is provided in the piston. A pin protruding when the piston presses the valve to open the communication path is engaged, and a step portion for preventing the piston from returning is provided on the inner wall of the cylinder.
[0007]
In addition, another activation mechanism of the present invention includes a valve case having a communication passage connecting the external injection port and the inside of the fire-extinguishing agent storage container, and the communication when the valve case is pushed down by a vertically movable piston. In the start-up mechanism for a fire extinguisher comprising a valve that opens a passage, a non-explosive agent that generates heat by heating is installed in the upper chamber of the cylinder above the piston, and is urged so as to protrude laterally into the piston. Characterized in that a stepped portion is provided on the inner wall of the cylinder to prevent the piston from returning when the pin protrudes when the piston is lowered and the valve is pushed down. It is.
At this time, a non-explosive chemical is provided in the upper lid of the valve case for sealing the cylinder upper chamber, or a non-penetrating lateral hole is formed in the side surface of the piston, and the pin is urged so as to protrude inside by a spring. It is effective to provide
[0008]
The fire extinguisher of the present invention is characterized in that two or more fire extinguishing device activation mechanisms are provided for one fire extinguishing agent storage container. It is more effective to provide a head member having a passage and to provide two or more fire extinguishing device activation mechanisms on the head member.
[0009]
【Example】
An embodiment of the present invention will be described below.
[0010]
Example 1
As shown in FIG. 1, a non-explosive using barium chromate or the like embedded in a resin (20) in a hole facing the lower surface of an upper lid (12 ') that closes a cylinder upper chamber (8) in a valve case (3). The ignition ball (21) is installed, a nichrome wire for operating the ignition ball (21) is embedded together with the ignition ball (21), and a starting wire (22) connected to the nichrome wire is externally provided. Pulled out.
[0011]
Further, a lateral hole (23) was drilled in the side surface of the piston (7 '), and a pin (24) and a pin spring (25) were installed therein. And this pin (24) is urged | biased by this spring (25) so that it may protrude from a piston side surface. Further, when a step (26) is provided at an appropriate location on the inner wall of the cylinder, when the piston (7 ') is lowered, the pin (24) protrudes in the lateral direction and the piston (7') attempts to return to the original position. The pin (24) engages with the step (26) to lock the piston (7 ') in the lower position.
[0012]
According to the mechanism of the present invention, the piston (7 ′) is in the upper limit position in the cylinder chamber (6) before the fire extinguishing device is started, and the pin (24) in the piston (7 ′) is It does not protrude and abuts against the cylinder inner wall. When the fire extinguisher is started, when the ignition ball (21) is heated by the nichrome wire, the ignition ball (21) generates a large amount of heat and rapidly expands the air in the cylinder upper chamber (8). ) Descends and pushes down the valve (2) that is in contact with the lower surface of the piston (7 ′) to open the medicine outlet (5). At this time, since the position of the horizontal hole (23) of the piston (7 ') passes through the step (26) position of the inner wall of the cylinder, the pin (24) projects from the side surface of the piston. For this reason, when the heat generation of the ignition ball (21) ends, the air in the cylinder upper chamber (8) contracts and the valve spring (4) protrudes even if the valve (2) tries to return to the original closed position. Since (24) remains engaged with the step (26), the valve (2) does not return and the medicine jet (5) remains open, and the fire extinguishing chemical continues to be radiated to the outside.
[0013]
According to the starter of the present invention, a normal portable hand-held fire extinguisher can be simply and simply an automatic or semi-automatic fire extinguisher.
[0014]
(Example 2)
As shown in FIG. 2, a vertically long head member (32) having an internal passage (31) in the longitudinal direction is screwed to the base (30) of the fire extinguishing agent storage container (1), and the side surface of the head member (32). The following valve housing members (33) and (33 ′), to which external injection ports (14) and (14 ′) communicating with the internal passage (31) were attached, were respectively screwed into the two locations. That is, the valve housing member (33) normally closes the medicine injection port (5) connected to the internal passage (31) with the valve (2), and in response to the fire extinguishing device start signal in the same manner as in the first embodiment. The ignition ball (21) suddenly generates heat, pushes the piston (7) laterally, and thus presses and moves the valve (2) in contact with the piston.
[0015]
The external injection ports (14) and (14 ') of these valve housing members can be monitored at two locations at the same time by piping separately to two locations that need to be extinguished. Therefore, conventionally, for example, when two locations need to be monitored, two fire extinguishing agent storage containers are required. However, according to the present invention, only one unit is sufficient, and the installation space can be reduced and parts can be reduced.
If necessary, three or more such valve housing members may be provided on the head member.
The automatic or semi-automatic fire extinguisher having such a structure is also used for a house, but can be advantageously used for a machine tool or the like because it can be particularly downsized.
[0016]
【The invention's effect】
According to the present invention, an activation device capable of automatic activation or remote activation of a fire extinguishing device can be handled safely because it does not use explosives, and a gas generating agent is used to keep the valve open as in the prior art. Therefore, there is no need for a structure for filling the gas and maintaining a high pressure, and the return of the valve can be prevented by a mechanically reliable means. Therefore, there is an advantage that the structure is simple and the number of parts is small. In addition, since one fire extinguishing agent storage container can monitor a plurality of fire extinguishing points, the installation space for the fire extinguishing agent storage container can be reduced, and even a small and inexpensive fire extinguisher (fire extinguisher) can be easily used. One or more starters can be installed, and a low-cost fire extinguishing device can be provided.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
FIG. 2 is a partial cross-sectional side view showing another embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fire extinguishing chemical | medical agent storage container 2 Valve 3 Valve case 4 Valve spring 5 Chemical injection port 6 Cylinder chamber 7 Piston 8 Cylinder upper chamber 9 Initiator receptacle 10 Gas generating agent 11 Initiator 12 Upper lid 13 Communication path 14 External injection port 20 Resin 21 Ignition ball 22 Electric wire 23 Horizontal hole 24 Pin 25 Pin spring 26 Step 30 Base 31 Internal passage 32 Head member 33 Valve housing member

Claims (6)

In an activation mechanism for a fire extinguishing apparatus, comprising a valve that closes a communication path that connects an external jet port and the inside of a fire extinguishing agent storage container, and further includes a piston member that opens the communication path by pressing the valve. A non-explosive that generates heat by heating is provided in the cylinder chamber of the piston, a pin that is urged to protrude in the radial direction of the piston is provided in the piston, and the rapid expansion of air in the cylinder chamber due to the heat generation of the non-explosive the piston engages a pin projecting upon opening the communication passage to press the valve operated by, for fire extinguishing apparatus characterized in that a stepped portion for preventing the return of the piston to the cylinder inner wall Launch mechanism. A fire extinguisher comprising a valve case having a communication path connecting the external injection port and the inside of the fire-extinguishing agent storage container, and a valve that opens the communication path when pushed down by a piston capable of moving up and down in the valve case In the starting mechanism, a non-explosive agent that generates heat by heating is installed in the cylinder chamber of the piston, a pin that is biased to project laterally of the piston is provided in the piston, and the non-explosive agent generates heat. A step is provided on the inner wall of the cylinder to prevent the return of the piston by engaging with the pin that protrudes when the piston that operates due to the rapid expansion of air in the cylinder chamber descends and pushes down the valve. Start-up mechanism for fire extinguishing equipment. The fire extinguishing device activation mechanism according to claim 2, wherein the non-fire chemical is provided in an upper lid of a valve case for sealing the cylinder chamber. The fire extinguishing device starter mechanism according to claim 1 or 2, wherein a non-penetrating lateral hole is formed in a side surface of the piston, and a pin biased so as to protrude by a spring is provided inside.   A fire extinguisher comprising two or more fire extinguishing device activation mechanisms according to any one of claims 1 to 4 for one fire extinguishing agent storage container.   The head member which has an internal channel | path is provided in the nozzle | cap | die of a fire extinguishing chemical | medical agent storage container, This head member is provided with two or more start-up mechanisms for fire extinguishing apparatuses in any one of Claims 1-4. Fire extinguisher.

Images