JP2704247B2 - Heat-sensitive part of sprinkler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head which is attached to an end of a fire extinguishing water pipe laid in an office, a hotel, a factory, or the like, and immediately detects a fire and extinguishes the fire.

[0002]

2. Description of the Related Art A conventional sprinkler head has a head body attached to a tip of a fire extinguishing water pipe, a valve inside the head body, which normally closes a water outlet of the head body, and a valve for maintaining a closed state of the valve. And a heat-sensitive part (release means) which is composed of a heat-sensitive body cylinder and a heat-sensitive body piston, and which releases the hold means at the time of heat-sensing.

As a specific configuration of the heat-sensitive portion, ie, the releasing means, a fusible piece 17 is interposed and held between a heat-sensitive body piston 14 supported by a setting plate 11 and a heat-sensitive body cylinder 13 supported by a balancer 12. As a means for transmitting as much heat as possible to the fusible piece 17, a single deep dish-shaped heat sensitive plate 16 is provided at the outer end of the heat sensitive cylinder 13 so as to surround the outer periphery of the heat sensitive part. For example, Japanese Utility Model Publication No. 53-8239 (FIG. 1),
No., Japanese Utility Model Publication No. 2-29972 and Japanese Utility Model Publication No. 5-20342.

Although the basic structure is the same as the above, other examples of the heat-sensitive portion (release means) include a slider 16
The ball 19 loosely fitted and held in the window hole of the heat sensitive body piston 2
3 is stabilized by the balancer 20 fitted on the stem rod portion 24, and the heat-sensitive body piston 23
Thermosensitive body cylinder 25 and thermosensitive body piston 2 fitted in
A heat sensitive plate 27 is fixed to the outer end of the heat sensitive cylinder 25 so that a sufficient heat is applied to the meltable piece 26. For example, JP-A-6
See -178825 publication.

[0005]

However, in both the former and the latter conventional examples, the heat-sensitive plate 16 (27 "the latter in parenthesis") is only attached to the heat-sensitive cylinder 13 (25). Moreover, the shape of the heat sensitive plate 16 (27) has a deep dish shape and covers the heat sensitive part.
7) There is an air gap inside the heat sensitive body cylinder 13
(25) is in a state where hot air cannot directly act.

Therefore, when a fire occurs, the high-temperature hot airflow flowing along the ceiling once heats the heat-sensitive plate 16 (27), and the heat is transmitted to the heat-sensitive plate 13 (25) only by conducting the heat through the heat-sensitive plate. Because it is heated, the soluble pieces 17 (26)
Not only does it take a long time to heat and elute, but at low temperatures the heat can not be sufficiently sensed, so that the fire progresses before reaching a high temperature.

In any of the conventional heat-sensitive parts, no heat-sensitive plate is mounted on the heat-sensitive body piston 14 (23). As a result, the fusible pieces 17 are removed from the members of the heat-sensitive body piston 14 (23). No more heat can be conducted to (26), so in any state the fusible pieces 17 (2
6) was eluted as soon as possible after the occurrence of the fire, and the essential requirements for fire prevention were not sufficiently satisfied. In view of the above, the present invention has been made to solve the above-mentioned problems, and provides a sprinkler head having high responsiveness to fire.

[0008]

SUMMARY OF THE INVENTION A sprinkler head body attached to a tip of a fire extinguishing water pipe, a valve for stopping a water discharge port of the head body, and holding means for maintaining a closed state of the valve. A sprinkler head comprising a heat-sensitive cylinder and a heat-sensitive body piston, and a release means for releasing the holding state of the holding means at the time of heat-sensing, wherein the heat-sensitive cylinder and the heat-sensitive body piston which constitute the release means are respectively provided outside the sprinkler head. By fixing the heat-sensitive plate, the amount of heat received is increased, and sufficient heat is transferred to the fusible piece interposed between the heat-sensitive body cylinder and the heat-sensitive body piston in a short time.

[0009]

According to the present invention, the heat-sensitive plates mounted on the outside of the heat-sensitive body cylinder and the heat-sensitive body piston allow the fusible pieces interposed between the heat-sensitive body cylinder and the heat-sensitive body piston to quickly take in a large amount of heat to cause a fire. The water is eluted early after the occurrence, the release means is operated, and the closing and holding means of the valve for stopping the water discharge port is released to start watering as a sprinkler, thereby stopping the progress of the fire as soon as possible.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.
The present invention relates to a releasing means for releasing a holding means for maintaining a water stopping state early after a fire occurs.

Next, the overall structure of the sprinkler head including the release means will be described. The sprinkler head comprises a sprinkler head main body 1 attached to the end of a fire extinguishing water pipe, and a spout port of the head main body 1. A valve 3 for keeping water shut off in a normal state, holding means A for maintaining the closed state of the valve 3, a thermosensitive body cylinder 15 and a thermosensitive body piston 1
And release means B (heat-sensitive portion) configured to release the holding state of the holding means A in response to heat at an early stage.

More specifically, the sprinkler head main body 1 is screwed to each intake end of a fire extinguishing water pipe laid on a ceiling of an office, a hotel, a factory, or the like, and holds the sprinkler head. On the opposite side, that is, on the lower part of the head, a spout 2 is projected. Outside the spout 2, an upper end of a cylindrical frame 8 is attached to and detached from a bag-shaped nut formed in the middle of the head body 1. The water stop valve 3 is connected to the deflector 4 by a deflector ring which is freely screwed and loosely fitted up and down freely in the gap between the water outlet 2 and the frame 8.
The water stop valve 3 is opposed to the water discharge port 2 so as to be in contact therewith.

The holding means A for maintaining the closed state of the water stop valve 3 includes a peripheral portion of the slider 6 loosely fitted on the set pin 5 below the water stop valve 3 and a balancer 10 below the slider 6. Between the peripheral edge of the ball 9
The water stop valve 3 is pushed up by the upper end of the set pin 5 in a state where the ball 9 is hung on the hooking step 7 on the inner periphery of the lower end of the frame 8 while holding the ball 9 partially outward. A conical coil spring 11 is interposed between the slider 6 and the deflector 4 to reliably and promptly perform a release operation described below, while strongly contacting the water discharge port 2 to stop water.

The release means B for releasing the closed state of the water stop valve 3 is provided on the outer peripheral portion of the thermosensitive body piston 13 having the cylindrical portion 14 screwed to the lower portion of the set pin 5 and the balancer 1.
Thermosensitive cylinder 1 integrated with or integrated with 0
5, a fusible piece 16 is interposed between the thermosensitive body cylinder 15 and the thermosensitive body piston 13,
Is eluted, the positional relationship between the balancer 10 and the heat sensitive body piston 13 is broken, and the holding means A is released, and the heat receiving amount is applied to each end of the heat sensitive body cylinder 15 and the heat sensitive body piston 13. In order to increase the number, heat-sensitive plates 17 and 18 made of a good heat conductor such as copper or brass are fixed.

Next, a series of operations of the above configuration will be described. First, as an initial condition, it is assumed that water is always supplied to the position of the water discharge port 12 of the sprinkler head, and that the drawing is in a water stopped state. Assuming that the heat is generated, first, the heat-sensitive plates 17 and 18 receive heat on the entire surface, and a large amount of heat is conducted to the heat-sensitive body piston 13 and the heat-sensitive body cylinder 15 constituting the releasing means B, and the fusible pieces 16 are heated and melted. The fusible pieces 16 elute from the gap between the outer circumference of the thermosensitive body piston 13 and the inner circumference of the thermosensitive body cylinder 15.

As a result, the balancer 10 is pushed down by a considerable amount by the elastic force of the spring 12 as the fusible pieces 16 decrease, and the balancer 10 is loosened between the balancer 10 and the slider 6. At this time, the balls 9, 9,... Of the holding means A are pushed between the balancer 10 and the slider 6 by the resilient action of the conical coil spring 11 and the close contact of the engaging step 7 on the inner periphery of the lower end of the frame 8. Then, the engagement between the balls 9, 9,... And the engaging step 7 gradually becomes shallower, and as the fusible pieces 16 decrease, the holding means A is eventually released.

At the next moment, the holding mechanism A is pushed out of the frame 8 by the elastic force of the conical coil spring 11 and disassembled and scattered. The water is received by the deflector ring at the hooking step portion 7 and becomes a drooping state, and the strong water jet spouting from the water discharge port 2 collides with the water stop valve 3 to form a shower from the part of the deflector 4 so as to form a shower. Water to extinguish the fire.

As described above, by attaching the heat sensitive plates 17 and 18 to the heat sensitive body cylinder and the heat sensitive body piston, respectively, a large amount of heat is received from the high-temperature hot air flow concentrated on the ceiling, and each of the heat sensitive plates 17 and 18 is received. The heat capacity in the middle is reduced by reducing the thickness of the member from 18 to the fusible piece 16 (the interior of the heat-sensitive body piston is also hollow) within the allowable range in consideration of the strength and heat loss due to heat radiation. It is made smaller so that stagnation of heat conduction is eliminated, and a large amount of heat is transmitted to the fusible piece 16 at an early stage, so that the fusible piece 16 can be melted in an extremely short time.

[0019]

According to the present invention, a flat heat-sensitive plate 1 is provided.
7 and 18 are the thermosensitive body cylinder 15 and the thermosensitive body piston 13
By attaching to the outer end of each of the above, unlike the conventional heat sensitive plate, a sufficient heat receiving area can be secured and a large amount of heat can be melted in a short time.
6 to dissolve the fusible pieces 16 and release the closed state of the water stop valve 3 at an early stage, so that the progress of the fire can be prevented at an early stage.

Further, by making the cross-sectional shape of the heat sensitive plates 17 and 18 into a corrugated or thin dish shape, a substantial area can be obtained which is larger than an apparent area in the case of a completely flat type, and there is an effect of further improving the heat receiving efficiency. Early dissolution can be promoted.

In the present invention, the heat-sensitive plates 17, 1
8 does not cover the heat-sensitive body cylinder 15 and the heat-sensitive body piston 13 as in the conventional example, no air chamber is formed inside, and the outer peripheral portion of the heat-sensitive body cylinder 15 is directly heated by hot air. Can be remarkably accelerated.

Further, the fusible pieces 16 are separated from the heat sensitive plates 17 and 18.
By reducing the thickness of the member in the heat conduction path leading to as much as possible, the heat capacity on the way is reduced, the stagnation of heat conduction is reduced, and a large amount of heat is transmitted to the fusible piece 16 quickly.

[Brief description of the drawings]

FIG. 1 is a cutaway longitudinal sectional view of a main part of a sprinkler head of the present invention.

FIG. 2 is a plan view of a slider.

[Explanation of symbols]

 Reference Signs List A holding means B releasing means 10 balancer 13 heat-sensitive body piston 15 heat-sensitive body cylinder 16 fusible piece 17, 18 heat-sensitive plate

Claims (1)

(57) [Claims] 1. A sprinkler head main body attached to a tip of a fire extinguishing water pipe, a valve for shutting off a water discharge port of the head main body, holding means for maintaining a closed state of the valve, and a heat-sensitive element In a sprinkler head comprising a cylinder and a heat-sensitive body piston and a release means for releasing the holding means from the holding state at the time of heat, a heat-sensitive plate is fixed to each outside of the heat-sensitive cylinder and the heat-sensitive body piston constituting the release means. A sprinkler head characterized in that the amount of heat received is increased and a large amount of heat is conducted to a fusible piece interposed between the heat-sensitive body cylinder and the heat-sensitive body piston.