JPH0446770Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is a dry sprinkler system, more specifically, a dry sprinkler system, in which piping is filled with fire extinguishing water via compressed air.
This invention relates to a dry sprinkler system equipped with a frame-type sprinkler head used in so-called dry sprinkler equipment, which sprays fire extinguishing water by pressurizing water after the sprinkler head is operated in a heat-sensitive manner.

(Prior Art) Conventionally, in this type of dry sprinkler system, there is a system as shown in FIG. 5 that is most similar to the present invention.

That is, in this device, a frame-shaped sprinkler head 9b is attached to the lower part of a cylindrical device body 1b that is connected to the water supply port side of the water distribution pipe 2b, and a frame-shaped sprinkler head 9b is attached to the lower part of the device body 1b that is connected to the water supply port side of the water distribution pipe 2b. The upper opening 14b of the valve cap 1
A main rod 15b is provided hanging down from the upper opening 14b to be closed via the sprinkler head 3b, and a plurality of sub-rods 17d are interposed between the main rod 15b and the sprinkler head 9b so as to abut each other. The structure is as follows.

In use, when the sprinkler head 9c is sensitive to heat, the sub rods 17d, .
b is the device body 1 together with the valve cap 13b.
b, and the upper opening 14b of the apparatus body 1b opens, whereby the fire extinguishing water in the water pipe 2b flows under pressure into the apparatus body and is sprayed from the sprinkler head 9b. .

(Problems to be Solved by the Invention) However, in the above-described device, the outer peripheral surface of the sub-rod 17d is formed flat and the entire outer circumferential surface is formed into a cylindrical shape with a uniform outer diameter.
As mentioned above, when the sub-rod 17d falls to the side of the sprinkler head 9b, the sub-rod 17d
without falling off, both frame parts 9c, of the sprinkler head 9b, as shown in Fig.
There was a risk that the parts 9c would be placed on the upper surface of the lower part 28b where they intersect. That is, the above subrod 1
As described above, the outer circumferential surface of the sprinkler head 7d has a well-balanced cylindrical shape with a flat outer circumferential surface, so if the central part of the sprinkler head 7d happens to be placed on the lower part 28b of the sprinkler head 9b as shown in FIG. The left and right balance is maintained, and the balanced state is maintained by the air that flows into the device body and blows toward the sprinkler head 9b immediately after the heat-sensitive operation, so that the sub-rod 17d is connected to the lower part 28b of the sprinkler head 9b. Instead of falling off, it stays on the table.

Therefore, if fire extinguishing water is discharged while such a sub-rod 17d is placed on the lower part 28b of the sprinkler head, this sub-rod 17d
There was a problem in that the deflector 29b, which has a water sprinkling function, was obstructed and a uniform water sprinkling state could not be maintained.

In this case, even if the plurality of sub-rods 17d, . However, only the sub-rod 17d interposed at the top between the main rod 15b and the sprinkler head 9b has the possibility of being placed on the lower part 28b of the sprinkler head as before in order to avoid collision with other sub-rods. Therefore, the above problem could not be solved.

The present invention was developed to solve these problems, and it prevents the sub-rods from being placed on the bottom of the sprinkler head, so that in the event of a fire, each rod etc. can fall off the equipment body very smoothly. The purpose of this is to maintain a uniform state of water sprinkling from the deflector.

(Means for Solving the Problems) A means for solving the above-mentioned problems of the present invention is to provide a dry sprinkler system having the above structure with a plurality of sub-rods interposed between the main rod and the sprinkler head. Among these, at least the outer peripheral surface of the uppermost sub-rod is formed into a tapered shape.

(Function) In other words, since the outer circumferential surface of the uppermost sub-rod is formed in a tapered shape, even if this sub-rod falls toward the sprinkler head and attempts to be placed on the lower part of the sprinkler head, the outer circumferential surface will not be tapered. Because of its unbalanced shape, it loses its balance on the lower part and quickly falls off, never remaining on the lower part of the sprinkler head. Also, as mentioned above, other subrods other than the top one quickly fall off.

(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

FIG. 1 shows an exemplary dry sprinkler system.

In FIG. 1, reference numeral 1 denotes a device body installed vertically from a water supply port 5 of a joint 4 formed by connecting two water pipes 2 and 3, and is screwed onto the inner circumferential surface of the water supply port 5. It is composed of an upper cylinder body 6, a middle cylinder body 7 fitted into the lower part of the upper cylinder body 6, and a lower cylinder body 8 fitted externally into the lower part of the middle cylinder body 7. Reference numeral 9 denotes a frame-type sprinkler head having curved frame portions 9a, 9a, and an upper mouth portion 10 is screwed onto the inner circumferential surface of the lower opening portion 11 of the lower cylinder body 8. Reference numeral 12 indicates a deflector provided at the bottom of the sprinkler head 9. 13 is a valve cap that closes the opening 14 of the upper cylinder 6; 15 is a main rod whose upper end is fixed to the valve cap 13 with a set screw 16; It is provided. 17a, 17b, 17c are the main rods 1
5 and the sprinkler head 9, each sub-rod 17a, 17b, 17c is formed shorter than the length of the sprinkler head 9, and the upper part 2 The sub-rods 17a and 17b are formed into a substantially conical shape with a tapered outer circumferential surface, and the lowermost sub-rod 17c is formed into a substantially cylindrical shape with a flat outer circumferential surface. Of these sub-rods 17a, . 19 is the middle cylindrical body 7;
This is a support plate installed between the upper end and the inner peripheral surface of the upper cylinder 6, and the main rod 15 is inserted and supported through the hole 20 at the center of the support plate. 21 is the middle cylindrical body 7;
The support plate is installed between the lower end of the lower cylinder body 8 and the inner peripheral surface of the lower cylinder 8, and the guide sleeve 18 is erected at the center of the support plate. Reference numeral 22 indicates a sphere interposed between the lowermost sub-rod 17c and the sprinkler head 9, and 23 and 24 indicate sealing plates attached to the lower part of the lower cylinder body 8. 25 and 2
Reference numeral 6 indicates a protector and a head spanner, respectively, which are provided to hang down from the side surface of the lower cylinder 8 and surround the sprinkler head 9.

Next, to explain the operation of the dry sprinkler system constructed as described above, first, the sprinkler head 9 becomes sensitive to heat, the pin 27 comes off, and the sphere 22 falls as shown in Fig. 3. 17a, 17b, and 17c sequentially fall toward the sprinkler head 9 and fall outside the sprinkler system, and the main rod 15 falls a predetermined distance along with the valve cap 13 as shown in FIG. When the main rod 15 is locked, it stops within the device body 1. As a result, the upper opening 14 of the apparatus body 1 opens and fire extinguishing water flows into the apparatus body 1 and is sprayed from the deflector 12 of the sprinkler head 9.

In this case, each of the above subrods 17a, 1
Among 7b and 17c, the topmost subrod 17a
has a tapered outer circumferential surface, so even if it were to fall onto the sprinkler head 9 side and try to be placed on the lower part 28 of the sprinkler head 9, it would lose its left and right balance as shown in Figure 4. As a result, it quickly falls off without being placed on the leg crossing portion 28. In addition, other subrods 17b, 1
7c is also collided with other subrods falling from above one after another and quickly falls off.

Therefore, the fire extinguishing water flowing in from the upper opening 14 of the apparatus body 1 passes through the apparatus body 1, is discharged from the lower opening 11, and is uniformly sprayed by the deflector 12.

In the above embodiment, there are three subrods 17a,...
However, the number of sub-rods 17a, . . . is not limited to this, and it is sufficient to provide a plurality of sub-rods, that is, at least two or more sub-rods.

In addition, in this embodiment, the upper two subrods 17
Although the outer circumferential surfaces of the sub-rods a and 17b are tapered, the outer circumferential surface of the second sub-rod 17b does not necessarily have to be tapered, and the point is that at least the outer circumferential surface of the uppermost sub-rod 17a is tapered. It would be fine if it had been done. That is, since the sub-rods 17a other than the top one are collided with other sub-rods falling from above in sequence, they can be placed on the lower part 28 of the sprinkler head 9 without necessarily forming the outer peripheral surface into a tapered shape. There is no such thing.

Furthermore, the device body 1 has an upper part as in the embodiment.
It is composed of three cylindrical bodies 6, 7, and 8 in the middle and lower part, but it does not necessarily have to be composed of a plurality of cylindrical bodies.For example, it may be formed integrally with one cylindrical body. It can be something.

Further, in this embodiment, the upper opening side of the device body 1 is connected to the water distribution pipes 2 and 3 via the joint 4, but the joint 4 is not necessarily necessary, and for example, the device body can be connected directly to the approximately T-shaped water pipe. 1 may be connected.

Others: guide sleeve 18, support plates 19, 2
1. The configuration and presence/absence of the sealing plates 23, 24, etc. are by no means limited to the embodiments, and the design can be changed as desired.

(Effects of the invention) As mentioned above, the present invention is such that, among the plurality of sub-rods provided between the main rod and the sprinkler head, at least the uppermost sub-rod has a tapered, substantially conical outer peripheral surface. When each sub-rod falls toward the sprinkler head when the sprinkler head is heated, even if the top sub-rod were to be placed on the bottom of the sprinkler head, it would lose its balance and immediately fall off, thus preventing it from being placed on the bottom of the sprinkler head. There is no danger that the sub-rod will be placed on the lower part of the sprinkler head, and this sub-rod will not become an obstacle, resulting in a particularly remarkable effect in that a uniform state of water sprinkling from the sprinkler head can be maintained at all times. .

In this way, with the present invention, in the event of a fire, all the sub-rods, especially the top sub-rod, which had been a problem in the past, can be dropped from the sprinkler head extremely smoothly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a dry sprinkler system as an example. FIG. 2 is a sectional view of a main part showing an open state of the device body. FIG. 3 is an enlarged sectional view of the main part showing the falling state of the subrod. FIG. 4 is a schematic enlarged sectional view showing the interaction between the subrod and the sprinkler head. FIG. 5 shows a conventional example, in which A is a schematic longitudinal sectional view and B is a schematic enlarged sectional view showing the effect. 1...Equipment body, 2, 3...Water pipe, 9...
Sprinkler head, 13... Valve cap, 15... Main rod, 17a, 17b, 1
7c...Subrod.

Claims (1)

[Scope of utility model registration request] A cylindrical device body 1 vertically connected to the water supply port side of a water distribution pipe, a frame-shaped sprinkler head 9 attached to the lower part of the device body 1, and a device body 1 connected to the water distribution pipe. A main rod 15 is vertically installed in the apparatus body 1 from the side of the upper opening 14 to close the upper opening 14 of the sprinkler through the valve cap 13, and there is mutual contact between the lower surface of the main rod 15 and the upper surface of the sprinkler head 9. The sub-rods 17a, .
a,... and a plurality of sub-rods 17a, which are interposed between the main rod 15 and the sprinkler head 9, in a dry sprinkler system configured such that the upper opening 14 of the device body 1 is opened when the main rod 15 falls. A dry sprinkler device characterized in that the outer peripheral surface of at least the uppermost sub-rod 17a is tapered.