JPH07109B2 - Automatic fire extinguisher with second sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an automatic fire extinguisher of a ceiling mounting type, which comprises a fire extinguishing agent tank with an injection hole, a liquefied carbon dioxide cylinder, and a heat-sensitive sensor. The present invention relates to an automatic fire extinguisher with a second sensor that causes a second sensor to operate and eject a fire extinguishing agent prior to the first sensor even when the blind spot of the sensor reaches a high temperature.

[Conventional technology]

A ceiling-mounted automatic fire extinguisher consisting of a fire extinguishing agent tank with an injection hole, a liquefied carbon dioxide cylinder, and a heat-sensitive sensor is installed on the ceiling of a small building where it is difficult to install a sprinkler. Since it is a type, it has been used in various places due to its excellent appearance, and has prevented many fires up to the present.

[Problems to be Solved by the Invention]

However, even with the above-described automatic fire extinguisher, there are cases where a fire cannot be detected only by the sensor installed in the fire extinguisher body. In such a case, the automatic fire extinguishing device cannot operate properly, which may cause a large fire. For example, when a fire occurs in a gas stove or the like having a range hood with a suction fan, the action of the suction fan causes the flame to become a pillar of fire and rise to the upper part, and the sensor attached to the automatic fire extinguisher may not be able to detect it. . In this case, the sucked flame may burn oil smoke or the like adhering to the pipe wall in the exhaust duct to cause a fire that is difficult to extinguish.

Therefore, even if there is a blind spot that cannot be detected by the first sensor provided in the main body of the fire extinguisher, a second sensor is provided in advance in this blind spot, and the fire extinguisher is activated when either the first sensor or the second sensor detects it. The means to do was required.

[Means for solving problems]

An object of the present invention is to solve the above-mentioned problem, and the configuration is such that a first sensor and a second sensor are connected by a wire, and a series of devices including a second solder is used to detect a second spring of a second sensor. The force to pull the wire is blocked by using the elastic force. Therefore, when the solder of the second sensor is melted, the wire is pulled together with the first sensor by the elastic force of the second spring, and substantially the same state as when the solder of the first sensor is melted is obtained.

[Action]

The present invention operates the automatic fire extinguisher by connecting the first sensor and the second sensor with a composite wire having flexibility on the outside and sufficient tension on the inside, and the sensor that detects the fire first operates. This is to ensure that the fire is extinguished.

As the second sensor, a shaft having a tapered constriction that compresses the second spring is fitted to a fixing ring having a plurality of slits and the inside of which surrounds the shaft. By covering with a heat-sensitive ring consisting of solder and a heat-sensitive part, the compression force toward the center of the shaft in the taper part is converted by 90 degrees and changed to a force that counteracts the force of pulling the shaft toward the second spring side. Keep in compression. When the second solder melts due to fire, the pressing force on the fixing ring decreases for the first time, and the constricted part of the shaft is pulled toward the cylinder case by the elastic force of the second spring, pulling the wire inside the composite wire, The same state appears when the first solder melts in one sensor.

Further, when the second sensor is attached, a gutter-shaped cover having a long hole is used, so that the second sensor can be attached to an arbitrary part according to the size of the attachment.

〔Example〕

FIG. 1 is an explanatory view showing the positional relationship between the first sensor and the second sensor. Reference numeral 1 is a first sensor, 2 is a second sensor, and the first sensor is attached to an automatic fire extinguisher 3 fixed to a ceiling 4. Reference numeral 5 is a fire extinguishing agent injection nozzle. Reference numeral 6 denotes a range hood mounted above the gas range 7, and a second sensor is installed in the center of the range hood. First
The sensor 1 and the second sensor 2 are connected by a composite wire 8. 9 is a suction fan, and 10 is an exhaust duct. 14 is a filter that removes dust and oil smoke.
The second sensor may be provided inside or outside the filter 14.

In this case, when a fire occurs from the gas range, the suction fan sucks the fire and the fire rises straightly, so that a sufficient temperature rise is not seen near the first sensor 1 of the fire extinguisher. It becomes important without the sensor detecting it. In the case of FIG. 1, since the second sensor 2 is installed, the same state as when the second sensor senses and the first sensor senses is obtained, and the fire extinguishing agent can be sprayed to extinguish the fire.

FIG. 2 is a sectional view showing the structure of the fire extinguisher. 11 is a carbon dioxide gas cylinder, and 12 is a sealing unit. The tip of the firing pin 13 faces directly below the sealing part. When the sensor operates, the firing pin 13 breaks the sealing portion 12 and jets out the carbon dioxide gas, which fills the medicine tank indicated by the phantom line, and ejects the fire-extinguishing medicine from the injection hole 5 due to the pressure.

Reference numeral 15 denotes a hammer, which is in a state of hitting the tail portion of the firing pin 13 by the compressed first spring 16, but is compressed by the compression plate 17 and the tip of the compression plate 17 is about the same as the engaging portion 19 at the tip of the hammer case 18. It engages at an angle of 45 degrees and compresses the first spring to prevent the hammer 15 from rising. Reference numeral 20 denotes a first solder case, which holds the first solder 21 with a solder retainer 22 leaving a space around it. Reference numeral 23 is a heat collecting plate made of a copper plate having a high thermal conductivity.

When a fire occurs and the first solder melts, the first solder case 20
The solder melts and flows out from the space between the solder holder 22 and the solder presser 22, and the compression plate 17 is constantly pressed by the elastic force of the spring toward the solder case.
Pushing to the left in the figure, the engaging portion 19 is disengaged. As a result, the hammer 15 violently hits the tail portion of the firing pin 13 by the elastic force of the first spring 16, the sealing portion 12 is broken, and the extinguishing agent is ejected by the pressure of the ejected carbon dioxide gas.

Reference numeral 24 is a spring holding pin that further holds the solder holder 22. A small screw 25 fixes the spring holding pin 24. The composite wire 8 extends from the spring holding pin 24 and is connected to the second sensor. The composite wire 8 is highly flexible because it consists of an outer tube 26 formed into a pipe shape while being wound in a spiral shape, and accommodates a wire 27 such as a normal piano wire having excellent tension transmission in the outermost layer. Is covered with a solid vinyl pipe 54 or the like.

FIG. 3 is a partially exploded sectional view showing a main part of the second sensor 2,
FIG. 4 is a perspective view of the fixing ring, and FIG. 5 is a perspective view of the heat-sensitive ring.

The second spring 31 has a shaft 33 inside a spring case 32.
It is compressed and stored by. The tip of the shaft is connected to the composite wire 8. Therefore, the force for pulling the composite wire 8 and the force for suppressing this force are always in opposition to the second spring 31. A portion of the shaft 33 protruding from the spring case 32 forms a constricted portion 34. Constriction 34
Is restored to the original thickness through the tapered portion 35 again.
A fixing ring 36 is made of a plastic such as nylon, polyvinyl chloride, polypropylene, etc., and its inside is formed in a shape surrounding the tapered portion of the shaft 33. When fitting the shaft 33 into the fixing ring 36, at least two slits are formed at the tip end portion fitted into the constricted portion 34.
37 is provided. Due to the existence of the slit 37, the fixing ring 36 can be easily inserted into the shaft 33 from the first sensor 1 side.

Since the strength of the fixing ring 36 is weak, it is not possible
The spring force of the spring 31 cannot be countered, and the first sensor 1 is easily activated. FIG. 5 shows a heat-sensitive ring with which the fixing ring 36 is fitted. It is cylindrical and the inner cylinder is made of the second solder 38, and the outer cylinder is made of the heat-sensitive portion 39. By fitting the fixing ring 36 into the heat sensitive ring 55, the elastic force of the second spring 31 is completely suppressed. In FIG. 3, the second sensor is shown in a state where it is not fitted for easy understanding, but in actual use, it is used by being fitted as shown in FIG.

Reference numerals 40 and 41 denote heat insulating plates, and 40 prevents the heat sensed by the heat sensitive portion 39 from escaping to the first sensor side via the shaft 33 and lowering the sensitivity of the second solder. The heat insulating plate 41 is interposed between the spring case 32 and the heat sensitive ring 55 to prevent the heat sensed by the heat sensitive portion 39 from escaping to the shaft case 32 and lowering the sensitivity of the second solder. Further, 42 shown in FIG. 2 is a heat collecting plate, which is made of a metal having high heat conductivity such as a copper plate,
It extends from the heat-sensitive portion 39 and positively transfers ambient heat to the second solder 38, thereby improving the sensitivity of the second sensor.

In the above embodiment, the spring holding pin 24 is fixed by the machine screw 25 and the composite wire 8 is directly connected.
As shown in the figure, when the wire connecting screw 44 connected to the composite wire 8 is connected through the bearing 43, the force applied from the second spring 31 can be alleviated to a certain extent in the normal state, so that the second spring can be changed over time. It has the advantage that it can operate sufficiently even if the force of 31 is reduced.

When the second sensor of the present invention is installed, since the composite wire having the above structure is used, the internal wire 27 maintains sufficient tension and operates quickly even if there is a slackened portion or a curved portion. .

When mounting, do not expose the entire second sensor,
A gutter-shaped cover 50 is provided, and the second sensor 2 is provided on the bottom of the cover 50.
An exposure hole 51 is formed to expose only the heat-sensitive part of the. The heat-sensitive portion 39 of the second sensor set in this exposure hole is arranged and fixed. If this gutter-shaped cover is fixed to a part to be attached in this state, for example, the inside of the range hood, the heat sensitive part 39 is only visible in the gutter when viewed from below, and the appearance is good. For attachment, a long hole 52 is formed in the cover 50. Since the size and type of the range hood etc. differ depending on each manufacturer, a screw hole 53 is provided in another cover to be connected to this cover or a range hood to be fixed, and the screw hole 53 and the long hole 52 are screwed. This allows the second sensor to be fixed in a good appearance.

〔The invention's effect〕

According to the present invention, in a ceiling-mounted type automatic fire extinguisher consisting of a fire extinguishing agent tank with an injection hole, a liquefied carbon dioxide gas cylinder, and a heat sensitive sensor, a location where the heat sensitive sensor cannot sense, that is, a fire sensitively even if a blind spot is detected. It became possible to quickly extinguish the fire.

[Brief description of drawings]

Drawing shows an embodiment of the present invention, FIG. 1 is an explanatory view showing a positional relationship between a first sensor and a second sensor, FIG. 2 is a sectional view showing a structure of a fire extinguisher, and FIG. FIG. 4 is a perspective view of a fixing ring, FIG. 5 is a perspective view of a heat-sensitive ring, FIG. 6 is a perspective view showing an example of a second sensor mounting means, and FIG. It is sectional drawing which shows an example of the connection state of a 1st sensor and a composite wire. In the drawings, reference numeral 1 is a first sensor, 2 is a second sensor, 3 is an automatic fire extinguisher, 5 is a jet nozzle, 8 is a composite wire, 6 is a range hood, 9 is a suction fan, 11 is a carbon dioxide gas cylinder, and 12 is a seal. Part, 13 is a firing pin, 15 is a hammer, 16 is a first spring, 17
Is a compression plate, 19 is an engaging portion, 20 is a solder case, 21 is the first solder, 22 is a solder holder, 23 is a heat collecting plate, 24 is a spring holding pin, 25 is a small screw, 26 is an outer tube, and 27 is Wire, 28, 40,
41 is a heat insulating plate, 31 is a second spring, 32 is a spring case, 33 is a shaft, 34 is a constricted part, 35 is a taper, 36 is a fixing ring, 37 is a slit, 38 is a second solder, 39 is a heat sensitive part,
43 is a bearing, 44 is a wire connecting screw, 50 is a cover,
Reference numeral 51 is an exposed hole, 52 is a long hole, 54 is a coated vinyl tube, and 55 is a heat-sensitive ring.

Claims (4)

[Claims] 1. A liquefied carbon dioxide which stores a fire extinguishing agent necessary for extinguishing a fire and which exposes a fire extinguishing agent injection nozzle on a lower surface thereof, and a sealing part which is opened to conduct carbon dioxide gas into the tank. It consists of a gas cylinder, and the opening part of the liquefied carbon dioxide gas cylinder faces the sealing part with a slight interval.
A hammer is provided at the tail of the unsealing pin via a first spring that is kept compressed by a compression plate, and the compression plate is housed in a container and is made of another metal with a slight gap left. The compression plate is disengaged when the first solder is melted and pressed by the engaging portion through the sealed first solder, and the opening pin opens the liquefied carbon dioxide gas cylinder by the elastic force of the first spring. In a ceiling-mounted automatic fire extinguishing system in which a fire extinguishing agent is sprayed, the first sensor is closed and fixed with another metal and a spring holding pin while leaving a slight gap in the first solder container,
The sensor keeps the second spring compressed in the cylinder, provides a narrowed constricted portion on the base protruding from the cylinder, and transitions from the constricted portion to a large diameter portion through a tapered portion having a constant inclination angle. The shaft is provided, and the tip is divided into two or more with the base portion remaining in the constricted portion of the shaft, and the tip end is fitted into a fixing ring formed in a shape surrounding the constricted portion and the tapered portion of the shaft, The outer periphery of the fixing ring is fitted to a heat-sensitive ring including a second solder and a heat-sensitive portion, and the tip of the second sensor outside the cylinder is tightly wound spirally with a tough inner wire. An automatic fire extinguisher with a second sensor, characterized in that it is connected to the spring holding pin of the first sensor by a composite wire housed in an outer wire made of a tube. 2. The automatic sensor with a second sensor according to claim 1, wherein a heat insulating plate is inserted between the contact surface of the heat sensitive ring of the second sensor and the bottom of the cylinder and the other end of the heat sensitive ring. Fire extinguisher. 3. A heat collector made of a metal having a high thermal conductivity and provided with blades on the outside from the contact surface between the heat-sensitive ring of the second sensor and the bottom of the cylinder. An automatic fire extinguisher with a second sensor according to the second paragraph. 4. A cross section U for mounting the second sensor.
A gutter-shaped case having a character shape is provided, and an exposure hole for exposing the heat-sensitive part of the second sensor is provided in the case, and long holes are provided at both ends of the exposure hole to fix the second sensor to a necessary portion. An automatic fire extinguisher with a second sensor according to any one of items 1 to 3.