JPH11104263A - Thermosensitive mechanism for automatic fire extinguisher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermosensitive mechanism for automatic fire extinguisher which is easily assembled by a nonprofessional without depending on a skilled worker, stabilizes the quality performance of a product and enables automatic assembling in addition by unnecessitating soldering operation by using a ring-formed low melting point alloy (soldering). SOLUTION: This device is constituted to close a discharging port 12 by shutting up a piston 13 inserted to the discharging port 12 of a head main body 11 in the state of being capable of getting in/out within the discharging port by a heat collecting plate 14 and to open the discharging port by the jumping up of this piston 13. In this case, a thermosensitive ring 17 consisting of the ring-formed low melting point alloy (soldering) and forming a screw on its outer peripheral surface is provided and this thermosensitive ring is screw- mounted to the screw hole 15 of a heat gathering plate to engage an outer peripheral restraining part 19 on the side of the head main body on the lower tip surface of this thermosensitive ring to hold the heat gathering plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sensing mechanism for an automatic fire extinguishing system, and more particularly to an improvement in a fusible metal sensing unit.

[0002]

2. Description of the Related Art A general example of a conventional heat-sensitive mechanism of this type is shown in FIG.
Will be described. FIG. 3 is a longitudinal sectional view showing a heat-sensitive mechanism connected to a pipe or a tank as a part of the automatic fire extinguishing apparatus.

In the drawing, 1 is a head body having a connection port 1a at an upper end, 2 is a vertical hole (discharge passage) communicating with the connection port 1a, 3 is a horizontal hole communicating with the vertical hole 2 to be a discharge port, Reference numeral 4 denotes a piston movably inserted into the vertical hole 2 to close the connection port 1a, 5 denotes a heat collecting plate made of aluminum, 6 denotes a cylindrical member made of a copper alloy fixed to the heat collecting plate 5, and 7 denotes a cylindrical member 6. Solder 8
Numeral 9 denotes a nut for attaching the heat collecting plate 5 to the lower end of the piston 4 via the tubular member 6, and numeral 10 denotes a cap nut for attaching the flange member 7 to the head main body 1.

[0004] In the state of FIG.
Since a is closed, no extinguishing agent is released from the outlet. Then, when the heat is absorbed by the heat collecting plate 5 in the event of a fire, the heat is transmitted from the heat collecting plate 5 to the cylindrical member 6 and the solder 8 is melted. When the cylindrical member 6 is easily peeled off from the flange member 7 due to the melting of the solder 8, the piston 4 is peeled off from the flange member 7 together with the heat collecting plate 5 by the pressure on the connection port 1 a side applied to the piston 4, and falls down at once. When the piston 4 descends as shown by the imaginary line in the figure, the fire extinguishing agent is discharged from the discharge port 3 through the vertical hole 2 and the horizontal hole 3.

[0005]

Since the heat-sensing mechanism of the conventional automatic fire extinguishing apparatus is configured as described above, there are the following problems.

(1) In order for the heat collecting plate 5 to be made of aluminum,
Unless the copper alloy tubular member 6 is interposed, the flange member 7 cannot be soldered to the heat collecting plate 5, so that the number of parts increases.

(2) In order to solder, the response of heat sensing is affected by the amount of solder which must rely on the operator's "can" and the sensed temperature changes due to the melting temperature of the solder. In order to stabilize quality performance, soldering work by skilled workers is required.

The present invention has been made to solve such a problem, and the use of a ring-shaped low melting point alloy (solder) eliminates the need for a soldering operation. It is an object of the present invention to obtain a heat-sensing mechanism of an automatic fire extinguisher that can be assembled and has stable product quality and performance, and also enables automatic assembly.

[0009]

The heat-sensing mechanism of the automatic fire extinguisher according to the present invention closes the discharge port by closing a piston inserted into the discharge port of the head body so as to be able to move in and out by the heat collecting plate. And a heat-sensitive ring made of a low-melting alloy (solder) having a ring shape and having a screw formed on an outer peripheral surface thereof. The heat collecting plate is held by screwing into a screw hole of the plate and engaging the outer peripheral locking portion on the head body side with the lower end surface of the heat sensitive ring.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. One embodiment of the present invention will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing a heat-sensitive mechanism connected to a pipe as a part of a range automatic fire extinguisher with a hood fan for a house.

In the drawing, reference numeral 11 denotes a connection port 11a at the upper end.
, A discharge port that vertically communicates with the connection port 11a, a piston 13 that is inserted into and out of the discharge port 12, a heat collecting plate 14 made of aluminum, and a center 15 of the heat collecting plate 14. A hole having a size capable of accommodating the lower portion of the head body 11, a female screw 16 formed on an inner peripheral surface of the hole 15,
Reference numeral 17 denotes a heat-sensitive ring made of a ring-shaped low melting point alloy (solder), reference numeral 18 denotes a male screw formed on the outer peripheral surface of the heat-sensitive ring 17, and reference numeral 19 denotes a heat collecting plate 1 mounted on the outside of the head main body 11.
This is a locking member that engages with the lower end surface of the heat-sensitive ring 17 screwed into the hole 15 of No. 4.

As shown in FIG. 1, when a heat-sensitive ring 17 screwed into the hole 15 of the heat collecting plate 14 is suspended by a locking member 19, the heat collecting plate 14 causes the piston 13 to move into the discharge port 12. The outlet 12 is closed because it is trapped. Then, when heat is absorbed by the heat collecting plate 14 in the event of a fire, the heat is transmitted to the heat-sensitive ring 17 and the heat-sensitive ring (solder) 17 is melted. When the heat-sensitive ring 17 is melted, the heat collecting plate 14 comes off the locking member 19 due to the pressure on the connection port 11 a side, and drops together with the piston 13. Thus, the discharge port 12 is opened and the fire extinguishing agent is discharged.

The heat-sensitive ring 17 can be formed into a ring shape by cutting from a rod-shaped low melting point alloy, and can be threaded into the outer peripheral surface and screwed into the hole 15 of the heat collecting plate 14, so that the conventional soldering operation is performed. Is unnecessary and the manufacturing process is simple and easy to assemble, as well as automatic assembling.

Embodiment 2 FIG. One embodiment of the invention will be described with reference to FIG. FIG. 2 is a longitudinal sectional view showing a heat-sensitive mechanism connected to a pipe or a tank as a part of the automatic fire extinguishing apparatus. Omitted. In the drawing, reference numeral 20 denotes a stepped portion provided on the outer periphery of the middle abdomen of the piston 4, reference numeral 21 denotes a holding member for the heat-sensitive ring 17, which has a female screw 22 for screwing the male screw 18 of the heat-sensitive ring 17 on the inner circumferential surface. .

As shown in FIG. 2, when the heat-sensitive ring 17 is screwed to the holding member 21 and the heat-sensitive ring 17 is fixed to the head body 1 by the cap nut 10 via the holding member 21, the heat-sensitive ring 17 And the piston 4 is fixed at the closed position, so that the discharge port 3 is closed.

When heat is absorbed by the heat collecting plate 5 in the event of a fire, the heat is transmitted to the lower end of the piston 4 and the heat-sensitive ring (solder) 17 is melted. When the heat sensitive ring 17 is melted, the piston 4 moves down together with the heat collecting plate 5 due to the pressure on the connection port 1a side. When the piston 4 descends as shown by the imaginary line in the figure, the fire extinguishing agent is discharged from the discharge port 3 through the vertical hole 2 and the horizontal hole 3.

[0017]

As described above, according to the present invention, the use of a ring-shaped low-melting point alloy (solder) eliminates the need for soldering work, so that even a layman can easily assemble without using skilled workers. This has the effect of stabilizing the quality performance of the device and enabling automatic assembly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing Embodiment 1 of the present invention.

FIG. 2 is a longitudinal sectional view showing Embodiment 2 of the present invention.

FIG. 3 is a longitudinal sectional view showing a conventional mechanism.

[Explanation of symbols]

 11: Head body 12: Discharge port 13: Piston 14: Heat collecting plate 15: Hole 17: Thermal ring 19: Locking member 20: Stepped portion 21: Holding member

Claims (2)

[Claims] A piston inserted into a discharge port of a head main body so as to be able to enter and exit therefrom is closed in the discharge port by a heat collecting plate to close the discharge port, and the discharge port is opened by popping out of the piston. A heat-sensitive ring formed of a ring-shaped low melting point alloy (solder) and having a screw formed on an outer peripheral surface thereof; and the heat-sensitive ring is screwed into a screw hole of the heat collecting plate and a lower end face of the heat-sensitive ring. Wherein the outer peripheral locking portion on the head body side is engaged with the heat collecting plate to hold the heat collecting plate. 2. A heat-sensitive device, wherein a discharge port is opened and closed by a piston movably inserted into a discharge passage of a head main body, and is made of a ring-shaped low melting point alloy (solder) and has a screw formed on an outer peripheral surface thereof. The heat sensitive ring is screwed into a screw hole on the head body side, and a heat collecting plate is fixed to the lower end of the piston, and is engaged with the upper end surface of the heat sensitive ring on the outer periphery of the middle part of the piston. A heat sensing mechanism for an automatic fire extinguishing device, characterized in that a stepped portion is provided, and the stepped portion is engaged with the heat sensitive ring to hold the piston in a closed position.