JP2001299955A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head capable of preventing the scattering of broken pieces of a glass bulb in the operation of the sprinkler head using the glass bulb for a thermosensitive disassembling part and allowing the verification of the cause of the breakage of the glass bulb. SOLUTION: The glass bulb 41 is covered with a net 50 formed of a highly extensible resin material or highly heat conductive metallic material, whereby the impact in the scattering of broken pieces of the glass bulb 41 can be moderated. Since the trace of the breakage of the glass bulb 41 is left on the net 50, the cause of the breakage of the glass bulb 41 can be verified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing sprinkler head, and more particularly to a frame yoke type sprinkler head using a glass bulb in a pyrolysis part.

[0002]

2. Description of the Related Art As a conventional frame yoke type sprinkler head using a glass bulb, for example, there is a frame yoke type sprinkler head (hereinafter referred to as "sprinkler head") shown in FIG.

The structure of the sprinkler head shown in FIG. 4 is composed of a main body 10, a deflector 20, a valve body 30, and a thermosensitive decomposition part 4.
The main body 10 is provided with a water discharge hole 12 for discharging a fire extinguishing liquid sent from the pipe, and a lower part of the main body 10 is provided with a male screw 11 connected to a pipe (not shown). , Two arms 14, 14 are curved and extend, and the tips of the arms 14, 14 are connected to a boss 15. A female screw is screwed inside the boss 15, and the set screw 16 is screwed in to press the thermosensitive decomposition portion 40, and the valve 30 closes the water discharge hole 12.

[0004] The deflector 20 is fixed to the lower part of the boss 15 and uniformly sprays a fire extinguishing liquid discharged from the water discharge hole 12 on the floor surface. The valve body 30 is a cylindrical body having a convex cross section, and a hole 31 for holding the thermosensitive decomposition portion 40 is formed inside.

[0005] The pyrolysis part 40 is a glass bulb 41 in which an alcohol solution or the like is sealed in a glass container. The upper end 42 of the glass bulb is inserted into the hole 31 of the valve body 30.
The lower end 43 is brought into contact with the concave portion at the tip of the set screw 16 and the set screw 16 is screwed in to press the glass valve 41 and the valve body 30 to close the water discharge hole 12.

In the above-described sprinkler head, the heat of a fire causes the alcohol solution 44 sealed in the glass bulb 41 to evaporate, so that the glass bulb 41 ruptures and the valve body 30 is opened. The fire extinguishing liquid is released, and the fire extinguishing liquid collides with the deflector 20 and is uniformly sprayed on the floor.

[0007]

The glass valve of the above-mentioned conventional sprinkler head is ruptured by vaporization of the alcohol liquid enclosed therein, and fragments of the glass valve scatter around the sprinkler head. If they do, debris may hit the person and cause injury.

Further, the glass bulb is made of glass and is fragile. When a person walks with a long rod-like object under the sprinkler head, the tip of the rod hits the glass bulb of the sprinkler head and cracks the glass bulb. In some cases, the fire extinguishing liquid is sprayed from the sprinkler head by breaking glass bulbs in some cases, and the floor or furniture may be wetted with the fire extinguishing liquid.

In the above case, if the glass bulb is finely crushed and the debris is washed away by the fire extinguishing liquid, it becomes difficult to collect the glass bulb. There was a problem that it was not possible to verify whether or not it was destroyed.

Accordingly, an object of the present invention is to provide a sprinkler head capable of verifying the cause of breakage of a glass bulb without breaking glass bulb fragments when the sprinkler head operates.

[0011]

In order to achieve the above object, in the present invention, a glass bulb is covered with a net in a sprinkler head using a glass bulb in a pyrolysis part.

[0012] By covering the glass bulb with the net, when the glass bulb ruptures, the fragments are not scattered outside the net, which is safe.

When a resin material having good elongation is used as the material for forming the net, the net is deformed depending on how the glass bulb is broken, so that the cause of the burst of the glass bulb can be determined. For example, when a glass bulb is broken by an external force, a trace of a dented portion of the net to which the external force is applied remains. Similarly, when the liquid in the glass bulb evaporates, a trace of the net bulging outward remains.

Also, when a metal material having good heat conductivity is used as a material forming the net, the net is similarly deformed.

Further, by using a metal material having good heat conductivity, compared to the sprinkler head having no net, there is an effect that heat is efficiently transmitted to the glass bulb to speed up the operation of the sprinkler head.

As another means for achieving the object, in a sprinkler head using a glass bulb for the pyrolysis part, a high-viscosity substance may be coated on the surface of the glass bulb.

Since the surface of the glass bulb is coated with a high-viscosity substance, when the glass bulb ruptures, the high-viscosity substance has an effect of absorbing the momentum when fragments are scattered. Also, as in the case of the net, traces of how the glass bulb is broken remain, so that the cause of the burst can be determined.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the sprinkler head in which the above-mentioned glass bulb is covered with a net, examples of the elastic material for forming the net include vinyl resin and polypropylene as the resin material having good elongation properties. Examples of the metal having good conductivity include copper and aluminum.

Examples of the high-viscosity substance in the sprinkler head in which the surface of the glass bulb is coated with a high-viscosity substance include a highly viscous adhesive and a chewing gum gum base.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of a sprinkler head of the present invention, FIG. 2 is a net having traces of glass bulbs ruptured due to vaporization of an enclosed liquid, and FIG. 3 is a net having traces of glass bulbs broken by external force.

The sprinkler head of the present invention is obtained by covering the glass bulb of the conventional sprinkler head with a net, and the configuration of the sprinkler head itself is not different from the conventional product, so that the description of the configuration is omitted.

However, when assembling the sprinkler head of the present invention, it is necessary to cover the glass bulb 41 with the net 50.
After that, it is inserted into the hole 31 of the valve body 30, and the lower end 43 of the glass bulb 41 is fixed by tightening the set screw 16.

When the glass bulb 41 of the sprinkler head is broken, the fragments of the glass bulb 41 collide with the net 50 and reduce the impact and do not scatter around the sprinkler head. However, it is safe without being injured by the fragments of the glass bulb 41.

When the sprinkler head of the present invention is operated by a fire, the liquid sealed in the glass bulb 41 is ruptured by being vaporized by the heat of the fire, so that the net 50 covering the glass bulb 41 is broken.
Since the mark 50a swelling outward remains, it can be determined that the glass bulb 41 has ruptured due to heat and the sprinkler head has operated.

On the other hand, when the glass bulb 41 of the sprinkler head of the present invention is broken by an external force, the net 50 covering the glass bulb has an indented trace 50b left. It can be determined that the valve 41 has been broken and operated.

In the above embodiment, when the net 50 is formed of a metal material having good heat conductivity, the glass bulb 41
The heat is efficiently conducted to the sprinkler head, which has the effect of speeding up the operation of the sprinkler head. Further, as another embodiment, the same effect as that of the embodiment can be obtained even when the surface of the glass bulb is coated with a substance having high viscosity instead of the net.

[0027]

As explained above, according to the present invention, when the glass bulb of the sprinkler head ruptures, the impact of the glass bulb fragments is alleviated by the net, so that the glass bulb does not scatter to the surroundings. Since traces of broken glass bulbs remain, the cause of the broken glass bulb can be verified.

[Brief description of the drawings]

FIG. 1 is a front view of a sprinkler head of the present invention.

Fig. 2 Net with traces of glass bulb rupture due to vaporization of the enclosed liquid

Fig. 3 Net with traces of glass bulb broken by external force

FIG. 4 is a sectional view of a conventional sprinkler head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body 20 Deflector 30 Valve body 40 Thermosensitive decomposition part 41 Glass valve 50 Net

Claims (4)

[Claims] 1. A sprinkler head using a glass bulb for a pyrolysis part, wherein the glass bulb is covered with a net. 2. The sprinkler head according to claim 1, wherein the material of the net is a resin material having good stretchability. 3. The sprinkler head according to claim 1, wherein the material of the net is a metal material having good heat conductivity. 4. A sprinkler head using a glass bulb for a pyrolysis part, wherein the surface of the glass bulb is coated with a substance having a high viscosity.