JPS581944B2 - sprinkler - Google Patents

Description

[Detailed Description of the Invention] Conventional sprinklers use bimetal as a heat-sensitive element, so bimetal deforms due to heat. Even if bimetal is plated or painted, bimetal is susceptible to corrosion, especially when used in hot springs or other places. The drawback was that it could not be installed in locations with corrosive atmospheres.

The present invention eliminates the above-mentioned drawbacks of the conventional technology, and the embodiments of the present invention will be described below with reference to the drawings.
2 is a water supply pipe connected to a water storage tank; 2 is a cylindrical body having a drain port 3 in the circumferential body at the upper end and whose lower end is closed with a lid body 4 made of a magnetic material; the upper end opening is connected to the water supply pipe; It is connected to the tip of 1.

Reference numeral 5 designates a main valve having a small through hole 6 in the center thereof, which is slidably mounted inside the cylindrical body 1 and is pressed upward by a spring 7 whose lower end is brought into contact with the inner surface of the lid body 4; The rod body has a locking flange 9 at its upper end and a cutout groove 10 extending from the lower surface of the locking flange 9 to its outer circumference, and is slidably inserted into the through hole 4a of the lid 4.

11 is a water sprinkling plate fixed to the lower end of the rod 8; 12 is a water sprinkling plate 1;
a permanent magnet made of ferrite attached to the top surface of 1; 13;
．． 14 is attached to the lower surface of the lid body 4 facing the surface of the permanent magnet 12, and to the stepped portion 15 of the inner periphery of the upper end portion above the drain port 3 of the cylindrical body 1 facing the upper peripheral edge of the main valve 5. A nung-shaped elastic body 16 is a cover that covers the outer circumference of the cylindrical body 2, and its upper inner circumference is attached to the upper outer circumference of the cylindrical body 2.

The present invention has the above-described configuration, and normally, as shown in FIG.
The permanent magnet 12 is attracted to the lower surface of the lid 4, and the through hole 4'a of the lid 4 is hermetically closed. Therefore, the main valve 5 is moved upward by the spring 7, and the drain port 3 is closed. is main valve 5
It is airtightly closed and water is not released.

Next, due to the fire outbreak, the ambient temperature rises and the permanent magnet 12
When the permanent magnet is heated to a temperature above one Curie temperature, the magnetic flux of the permanent magnet is greatly reduced and it is no longer attracted to the lid body 4, and the permanent magnet 12 and the rod body 8 become one body, and are attracted by the water pressure of the cylindrical body 2. The water inside the cylindrical body 2 leaks from the through hole 4a through the gap between the inner circumferential body of the through hole 4a and the outer circumferential body of the rod body 8 and the notched groove 10. The water pressure inside decreases, the main valve 5 moves downward against the spring 7 due to the water pressure inside the water supply pipe 1, water is spouted from the drain 3, and the water is sprayed by the water spray 11 while being dispersed. Fires are meant to be extinguished.

FIG. 2 shows a different embodiment of the present invention. In FIG. 1, instead of the lid 4 made of a magnetic material, a permanent magnet made of ferrite or a magnetic material 11 such as an iron plate is fixed to the bottom surface of a non-magnetic material. The lid body 4' consists of a first
The operation is similar to that shown in the figure.

In this way, the present invention connects the upper end opening of a cylindrical body with a drain port in the circumferential body at the upper end and closes the lower end with a lid body having a through hole to the tip of the water supply pipe, and A lid made of a non-magnetic material or a lid made of a magnetic material has a magnetic material fixed to its lower surface, and a main valve having a small through hole that is slidably accommodated in the cylindrical body is pressed upward by a spring. A permanent magnet made of ferrite attached to the lower end of a rod having a locking flange at the upper end that can be slid through the through hole of the lid body is attracted to the lower surface of the lid body to airtightly seal the through hole of the lid body. Since it is closed, permanent magnets made of ferrite do not corrode, and are effective in providing sprinklers that can be installed in locations with corrosive atmospheres.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the invention, and FIG. 2 is a side view of a part of the invention. 1 is a water supply pipe, 2 is a cylindrical body, 3 is a drain port, 5 is a main valve,
1 is a spring, 12 is a permanent magnet, and 16 is a cover.

Claims (1)

[Claims] 1 A drain port is provided in the circumferential body at the upper end, the lower end is closed with a lid having a through hole, and the cylindrical upper end opening is connected to the tip of the water supply pipe, and a magnetic material is fixed to the lower surface of the lid. A main valve having a small through hole that is slidably housed in the cylindrical body is pressed upward by a spring, and the lid is made of a non-magnetic material or a magnetic material. A sprinkler in which a permanent magnet made of ferrite is attached to the lower end of a rod having a locking flange at the upper end that can be slid through the lid, and is attracted to the lower surface of the lid to airtightly close the through hole of the lid.