JPH059562U - Fire damper device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When the temperature rises in the event of a fire and the preset temperature is reached, the duct passage is immediately shut off, and there is almost no secular change. Remove the element. In addition, we devised the mounting method of the damper to improve the exhaust efficiency and eliminate the obstacles caused by wind pressure resistance. [Composition] A shaft in which both wing pieces (21, 22) that form a damper (2) by dividing a disc into two are arranged in a cylindrical main body (1) whose both ends are open, and whose base side is attached to the main body side. The body 3 is hinged, and coil springs 4 are wound around both ends of the shaft body at room temperature phase to fold both wing pieces to open the inside of the main body, and rewind when both wing pieces reach a high temperature phase of a set temperature. A coil spring 5 for high temperature sensing made of wire made of shape memory alloy, which opens the damper by the repulsion action and closes the inside of the main body, is wound around the shaft body, and the tips of both blades are placed on the ventilation port side. A space holding member 8 having a suction action between the wing pieces is attached to one inner surface of the tip portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a damper device for fire protection, which is designed to increase the temperature when a fire occurs. When the temperature reaches a preset temperature, Eliminates anxiety factors of malfunction by shutting off gently and almost eliminating secular change And improving the exhaust efficiency by devising the mounting of the damper, The purpose is to eliminate obstacles caused by wind pressure resistance.

[0002]

[Prior art]

  In the conventional fire damper device of this type, the applicant of the present invention has previously disclosed that the device is used in practice. In Japanese Patent Publication No. 7939, a device of a fireproof damper with a grill is provided. Sanawa Then, in the specification of the above-mentioned application, "a disk is placed in a cylindrical body whose both ends are open. Both winglets that divide into two to form a damper are placed, and the base end sides of the winglets are arranged. A carp that hinges with a shaft mounted on the main body side and expands both the wing pieces to a closed state. The le spring is wrapped around the shaft, and both wings are normally folded against the spring to open. There is a known structure of a known fire damper that is folded and locked by a clip with a fuse. Yes, I made it public.   In addition, the halves of the above fire protection damper with grill are folded in an open state. The clip with a fuse that melts melts the base of the pair of locking pieces when the set temperature is exceeded. It was also disclosed that the structure was fixed by soldering or soldering.

[0003]

[Problems to be solved by the device]

  However, fuses such as soldering used for the base of the above-mentioned clip may cause rust or There is a risk of corrosion, and the set position may be misaligned due to changes in temperature and vibration over time. Cause a troublesome factor of malfunction due to its relatively low melting point It was.   In addition, since the fuses such as the solder are consumable items, malfunctions and operating points before and after construction I always needed a spare fuse when I had an inspection.   In addition, the tip parts of both damper wings are installed in the opposite direction to the ventilation port. Therefore, the winglets act in the opening direction by receiving the exhaust resistance and exhaust The reality was that I was not very efficient.

[0004]

[Means for Solving the Problems]

  Therefore, the present invention aims to achieve the object of the invention and to solve the problems of the prior art. The first invention is to provide a damper device for fire protection in which both ends are open. Inside the cylindrical body, the two winglets forming the damper are placed by dividing the disc into two parts. At the same time, the base end sides of both wing pieces are hingedly connected by a shaft body attached to the main body side, Coil sps that fold both wings at the both ends in the room temperature phase to open the inside of the main body Wind the ring around the shaft, and wind both winglets when the temperature rises to the set high temperature phase. Temperature sensing to expand the damper and close the inside of the body by the repulsive action A coil spring for use is wound around a shaft body.   According to a second aspect of the invention, in the fire damper device according to the first aspect, the tip end portions of both wing pieces are provided. To the ventilation port side, and has a suction action between the wing pieces on one inner surface of the tip portion thereof. The space holding member is attached.

[0005]

[Action]

  The operation based on the above means is as follows. First, set with shape memory alloy wire When a high temperature is detected, it is memorized and applied in a shape that causes repulsion in the rewinding direction. Tighten the coil spring for temperature sensing that has been engineered in the normal temperature phase or low temperature phase. Then insert the hole into the shaft body and position the wire long wire parts at both ends inside the opposing wings. The hole of the coil spring that repels in the tightening direction in the normal temperature phase Insert the wire into both ends of the shaft, and press the wire extensions at both ends into pressure contact with the opposite outer sides of both wings. Keep it. Both winglets have a fixed distance between the base of the winglets and the spacing member mounted inside the tip. The air pressure is maintained by holding the gap and sucking and fixing the both tips. The state of FIGS. 1 to 3 is maintained without opening even when received.   In this state, the temperature sensing coil spring made of shape memory alloy rises in temperature. When it senses the high temperature set by, a strong repulsive action that tries to return in the rewinding direction Occurs, and overcomes the repulsive action of the coil springs at both ends of the shaft in the winding tightening direction. Furthermore, naturally, both wings are overcome by overcoming the suction action of the spacing member at the tip of the wings. Expand to close the duct passage.

[0006]

【Example】

1 is a vertical sectional front view, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 of FIG. In the figure, reference numeral 1 denotes a cylindrical main body, an inner cylinder 10 is fixed to a shaft mounting portion on an inner surface of the main body, and a flange 11 for mounting a hood or a louver is integrally formed at one end in the longitudinal direction of the cylinder. I am doing it. Reference numeral 2 is a damper composed of two blades 21 and 22 obtained by dividing a disk into two parts. Reference numeral 3 is a bearing body in which the base end sides of the two blades are curled to form bearings 21 ₁ and 22 _1. , and the the shaft body are mounted on the bearing portion 10 ₁ of the inner cylinder 10. As for the mounting direction of the wing pieces 21 and 22 to the shaft body, the tip end portion of the wing piece is on the ventilation port side, that is, outward in the illustrated example, but may be provided in the opposite direction, that is, inward. A coil 4 is wound around both ends of the shaft body 3, and the extended leg pieces 4 ₁ and 4 ₁ at both ends of the shaft body 3 normally fold both wing pieces 21 and 22 of the damper to keep the body open. It is pulling. Reference numeral 5 is a coil spring for sensing high temperature, which is formed of a wire made of shape memory alloy. When both wing pieces 21 and 22 of the damper-2 reach a high temperature phase set by the temperature rise, the damper is expanded by rewinding repulsive action. In order to make the inside of the main body closed, it is wound in the normal temperature phase or the low temperature phase, and the extension leg pieces 51, 51 at both ends thereof are positioned on the inner surfaces of both wing pieces, and are wound around the central portion of the shaft body 3. There is. Incidentally, the above-mentioned high temperature sensing temperature is set to be in the range of 80 ° C to 90 ° C, although it varies somewhat depending on the conditions of the installation site. The material of the shape memory alloy may be an alloy of nickel and titanium, but may be a copper / zinc / aluminum alloy or an iron-based material (iron / manganese / silicon). Reference numeral 6 denotes a spacing member provided on the inner surface of the tip portion of one of the two blade pieces 21, which fixes the folded blade pieces to each other with an appropriate suction force. 7 is a hood or louver attached to the flange 11 thereof, 8 is a base interval holding piece of both wing pieces 21 and 22 formed by cutting and raising a part of the inner cylinder 10, and 9 is a gap closing / stopper when the damper is closed. - and it is attached to one 21 ₁ of the wing. Reference numeral 12 denotes a plurality of elastic locking pieces fixed to the outer peripheral surface of the main body 1.

[0008]

[Specific use example]

The specific use procedure according to the above embodiment will be described below. First, with a shape memory alloy wire, when the high temperature set by the temperature rise is sensed, the coil spring 5 processed and stored in a shape that causes a repulsive action in the rewinding direction is tightened in the normal temperature phase or the low temperature phase. The hole is inserted into the shaft body 3, the extension leg pieces 51, 51 at both ends thereof are positioned on the inner surfaces of the two blade pieces 21, 22 facing each other, and the coil spring 4 repulsively acts in the winding tightening direction in the normal temperature phase. The holes 4 are inserted into both end portions of the shaft body 3, and the wire extension leg pieces at both ends thereof are pressed against the opposing outer surfaces of both wing pieces. The tip portions of both wing pieces are held at a constant distance by a gap holding member 6 attached to the inside of one wing piece, and the tip portions of both wing pieces are sucked and fixed to each other to obtain the state shown in FIGS. 1 and 2. Then, the main body 1 to sideways vent 13 ₁ of the exhaust duct 13, off - the vent 7 ₁ de 7 downward, and is mounted via an elastic locking piece 12. In this state, when the temperature-sensing coil spring 5 made of a shape memory alloy senses a set high temperature due to a temperature rise, a strong repulsive action that tries to return in the unwinding direction occurs, and the coil springs 4 at both end portions of the shaft body 3 4 overcomes the repulsive action in the winding direction, and naturally also overcomes the suction action of the spacing member 6 to expand both wing pieces 21 and 22 to close the passage of the main body 1 or the duct 13.

[0008]

[Effect of device]

  As described above, the present invention uses the shape memory alloy wire in the center of the passage of the main body. Coil the coil spring and mold it in advance. Fold both wings through a separate coil spring that acts, opening the body passage However, once the temperature rises, the high When the temperature is sensed, the coil springs are folded by The wing piece can be expanded to shield the main body passage with a damper.   In addition, the coil spring made of shape memory alloy for high temperature sensing works before and after construction. When performing a dynamic inspection or resetting at normal temperature after malfunction, the damper does not have to be replaced. -It can be used again because it automatically returns due to the repulsive action of the folding spring. It is convenient.   Furthermore, the coil spring for high temperature detection is attached to the shaft at the center of the main body passage. Since it is wound, it will not come off due to vibration, and setting due to temperature rise The high temperature can be sensed properly, and there is no risk of malfunction.   Moreover, the tips of the folded wings are temporarily fixed with the spacing member that has a suction effect. Therefore, it is always maintained at an appropriate interval, and is fixed with an appropriate suction force. As a ventilation hood for this type of fire, it does not rattle due to vibration or wind pressure. Very practical.   According to claim 2, the winglet tip portion is attached so as to face the ventilation port side. Therefore, the resistance of the exhaust gas passing through the duct or the passage of the main body is lessened and the exhaust gas is exhausted. The air efficiency is improved, and the suction force of the spacing member provided at one of the tip ends of the wing pieces improves the gas efficiency. The winglets that are folded together are sucked and fixed, so gusts and strong winds blow from the ventilation port side. Even if both winglets get caught and wind pressure is applied, there is no risk of the winglets opening or rattling. Both are convenient and easy to inspect and replace the coil spring for high temperature detection and other parts. Is.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a fire damper device according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

[Explanation of symbols]

1 Cylindrical body 2 Damper with two discs divided into two 3-axis body 4 Damper-Coil spring for folding 5 Shape memory alloy coil spring for temperature sensing 6 Spacing member for both folded wings 7 Hood or louver attached to the body 8 Spacing pieces for both wings 9 Closure between both blades and stopper 10 inner cylinder 11 Flange 12 Elastic hook 13 duct

Claims (2)

[Scope of utility model registration request] 1. A winglet (2) which forms a damper (2) by dividing a disk into two parts in a cylindrical main body (1) having both ends open.
1) ・ (22) is placed, the base ends of both wings are hinged by the shaft (3) attached to the main body side, and both wings are folded at both ends of the shaft at room temperature phase. The coil springs (4) and (4) that open the main body are wound around the shaft body (3), and when both winglets (21) and (22) reach the high temperature phase set by the temperature rise, rewind repulsion A fire protection, characterized in that a coil spring (5) for temperature sensing formed by a wire made of a shape memory alloy is wound around the shaft body (3) to open the damper by the action to close the inside of the main body. Damper device. 2. A spacing member (6) having a suction action between the blades on the inner surface (21) of one of the blades (21) and (22) with the tips thereof directed toward the ventilation port. Attaching the
The described damper device for fire protection.