JPS5810610Y2 - sprinkler head - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of sprinkler heads.
More specifically, the invention relates to an improvement in a fusible link portion that senses abnormally high temperatures, decomposes, and opens a valve via a guide member.

Various types of fusible link members have been proposed in the past as fusible link members whose heat susceptors melt at abnormally high temperatures and open, via guide members, a normally closed valve at the outlet of a conduit connected to a source of extinguishing liquid. However, all of them have the disadvantage that the disassembly of the fusible link portion is poor at abnormally high temperatures, or that the structure and assembly are complicated.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a sprinkler head whose fusible link portion reliably disintegrates at abnormally high temperatures, and which is simple in structure and assembly.

The structure and operation of the present invention will be explained below based on the drawings. Fig. 1 is a longitudinal sectional front view of an embodiment of the invention, and Figs. The sprinkler head 10 has a frame 11 and a conduit 12, as shown in FIG.

The conduit 12 has a flange 13 extending horizontally at its center;
It is formed by an upper cylinder part 14 and a lower cylinder part 15.

A male thread is formed on the flange 13, and the conduit 12 is attached to the frame 11 by screwing the male thread into the female thread of the frame 11.

An upper cylindrical portion 14 projecting upward from the frame 11 is provided with a male thread, to which a fire extinguishing liquid conduit (not shown) such as a water pipe is screwed and connected.

At the opening of the lower cylindrical portion 15 of the conduit 12 extending in the center of the interior of the frame 11, there is a valve 16 that freely closes the opening.
Place it in a small place to heat up.

The valve 16 is attached to a deflector member 17 slidably disposed inside the frame 11.

A fusible link 20, which is a feature of the present invention, is provided at the bottom of the valve 16 in order to keep the valve 16 pressed against the opening of the lower cylindrical portion 15 at all times.

As shown in FIG. 1, the fusible link 20 includes a first
It is configured to include a second lever 21, 22, a third lever 24, and a heat sensitive body 29.

As shown in FIGS. 1 and 2, the first and second levers 21 and 22 are formed to have a length slightly longer than the radius of the annular opening edge 11a of the frame 11, and are latched to the annular opening edge 11a. A positioning ear 23 is provided at the end on the side to be held.

The first and second levers 21 and 22 are respectively hooked between the annular opening edge 11a of the frame 11 and one half of the upper surface of the heat sensitive element 29, and are symmetrical to each other when viewed from the front and the frame 11 when viewed from the plane. are cross-linked in a straight line in the diametrical direction.

As shown in FIGS. 1, 3, and 4, the third lever 24 is formed to have a length shorter than the diameter of the annular opening edge 11a of the frame 11, and is located approximately in the middle of the lengthwise direction. has ribs 25 a and 25 b that extend downward and have a U-shaped cross section, and positioning pawls 27 and 27 are formed at appropriate intervals between the ribs 25 at 25 b, and both ends of the third lever 24 28, 28 are bent slightly downward so as to contact the upper surfaces of the first and second levers 21, 22.

The ribs 25a and 25b are respectively provided with holes 26° and 26' for assembling the heat sensitive body.

Further, as shown in FIG. 5, the hole 26' in one of the ribs is formed in an elliptical shape in the vertical direction so that the heat sensitive element 29 can be easily assembled.

The third lever 24 is positioned through the connection between the ears 23 of the first and second levers 21 and 22 and the claw 2γ of the third lever 24, and 21
, 22, and supports the deflector member 17 of the valve 16 on its upper surface.

In the embodiment shown in FIGS. 1 and 4, the heat sensitive body 29 includes a cylinder 30, a low melting point alloy 31 filled therein, and the cylinder 30 in contact with the low melting point alloy 31.
The spherical plunger 32 is fitted into the opening of the spherical plunger 32.

A hemispherical support portion 30a is attached to the outer end surface of the cylinder 30.

As shown in FIG.
Further, one half of the plunger 32 that can protrude from the opening of the cylinder 30 is engaged with and supported by the other hole 26' of the collar 25a.

Note that a heat collecting plate 3 is installed at the bottom of the cylinder 30 via a core 34.
3 is installed.

In the sprinkler head 10 having the above-mentioned configuration, when a fire occurs, heat is collected by the heat collecting plate 33, and the abnormally high temperature causes the heat sensitive element 2 to be heated.
The low melting point alloy 31 of No. 9 melts and flows out from the opening of the cylinder 30, and the plunger 32 sinks into the cylinder 30.
The support portion 30a attached to the cylinder 30 and the plunger 32 are connected to the collar 25a t 25b of the third lever 24.
hole 26'.

26, and the heat sensitive element 29 disassembles and falls off from the lower opening of the frame 11.

As the heat sensitive body 29 falls, the first and second levers 21 and 22, which are bridged to the annular opening edge 11a of the frame 11 and a half of the upper surface of the heat sensitive body 29, lose their balance, and the first and second levers 21 and 22 lose their balance. The second lever 21.22 and the third lever 24 fall.

At that moment, the deflector member 11 descends along the inside of the frame 11 and is suspended by the annular opening edge 11a of the frame 11, the valve 16 is opened, and extinguishing liquid is discharged from the lower opening of the lower cylindrical portion 15. , the fire is extinguished by being sprayed by the deflector member 17.

In the present invention, the heat sensitive body 29 is not limited to the structure shown in the illustrated embodiment, and the shape of the cylinder is not limited to a circle, but may be a square or an inverted triangle.

The present invention has the structure and operation described above, and the fusible link 20 portion connects the first and second levers 21 and 22 to the frame 1.
The annular opening edge 11a of the first lever 21 and one half of the upper surface of the heat sensitive body 29 are bridged symmetrically when viewed from the front and in a straight line in the diametrical direction of the frame when viewed from above, and these are the first and second levers 21, 22, a third lever 24 supporting a heat sensitive body 29 is placed astride the third lever 24, and the fusible link 20 portion as a whole connects the first and second levers 21, 22 and the third lever 24. It is configured to be symmetrically assembled on the upper part of the heat sensitive element 29, and has excellent resolution, so that when the heat sensitive body 29 disassembles and falls off, the first, second, and third levers 21, 22, and 24 are reliably and quickly disassembled. Has a falling effect.

In addition, the present invention has the first, second and third levers 21°22.2.
4 symmetrically when viewed from the front, and then press the third lever 2.
Since the heat sensitive element 29 is held between the heat sensitive elements 4 and 4, the structure and assembly are simple, and it can be easily incorporated into the frame of an existing sprinkler head.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional front view of one embodiment of the present invention, and Figure 2 is a front view of the first embodiment of the present invention.
, a perspective view of the second lever, FIG. 3 is a perspective view of the third lever, FIG. 4 is an enlarged vertical side view of the fusible link portion, and FIG. 5 is a heat sensitive element support formed on the third lever. FIG. 11... Frame, 11a... Annular opening edge, 20... Entire fusible link, 21, 22,
24...First, second, third lever, 2'5
a t 25 b ”...Flame for supporting the heat sensitive body formed on the third lever, 29... Heat sensitive body.

Claims (1)

[Scope of utility model registration request] a frame; first and second levers each having one end engaged with an opening edge of the frame and the other end facing each other; a third lever whose ends rest on the first and second levers;
lever, and a heat sensitive body held between U-shaped collars extending from the third lever, and opposing ends of the first and second levers are placed on the heat sensitive body. 1. A sprinkler head according to claim 1, wherein the heat-sensitive member is configured to fall off from between the brim in the event of a fire.