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Thermo-sensitive material and sprinkler head for using same

A heat-sensitive material and sprinkler technology, used in fire rescue and other directions, can solve problems such as unreasonable design, groundwater pollution, and appearance deterioration, and achieve good creep characteristics.

Active Publication Date: 2010-09-08
SENJU METAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, as long as there is no fire in the building, the sprinkler heads will remain installed there, so sprinkler heads that have deteriorated in appearance or design have become unreasonable need to be replaced with new sprinkler heads
The old sprinkler heads are disposed of, but since Pb or Cd is used as a heat-sensitive material in the thermally decomposed part of the sprinkler head, Pb or Cd contaminates groundwater

Method used

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  • Thermo-sensitive material and sprinkler head for using same
  • Thermo-sensitive material and sprinkler head for using same
  • Thermo-sensitive material and sprinkler head for using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An alloy for a heat-sensitive material of a thermally decomposed part of the sprinkler head of the present invention and a sprinkler head are produced.

[0036] Alloys for heat-sensitive materials for the heat-sensitive decomposition part of the sprinkler head described in Table 1 and Table 2 were produced, and the heating curve was measured for each alloy composition by differential thermal analysis, using the start point of the endothermic peak and the lowest point of the endothermic peak , The end point of the endothermic peak, and measure the solid phase temperature, peak temperature, and liquid phase temperature. Table 1 and Table 2 show the melting temperature of each alloy.

[0037] Comparative Example 1 in Tables 1 and 2 is an alloy for a heat-sensitive material in the thermally decomposed part of the sprinkler head of Patent Document 1.

[0038] The measurement conditions of the melting temperature are as follows.

[0039] 1. Determination of differential the...

Embodiment 2

[0048] Here, a sprinkler head incorporating a compression-type thermal decomposition part will be briefly described. figure 1 It is a front cross-sectional view of a sprinkler head incorporating a compression-type thermal decomposition part.

[0049] The sprinkler head S is composed of a body 1 , a frame 2 , a valve body 3 , a deflector 4 , and a heat-sensitive decomposition part 5 .

[0050] The main body 1 is provided with a water guide hole 6 through its center, and its lower end is a valve seat 7 . In addition, an external thread 8 is screwed on the upper part of the outer periphery of the body 1 , and a flange 9 is formed at the lower end thereof.

[0051] The frame 2 is cylindrical, its lower end is an inner flange 10 , and its upper end is screwed with the above-mentioned flange 9 .

[0052] The upper part of the valve body 3 is covered with a gasket 11, and the valve seat 7 of the body 1 is usually sealed in a watertight state.

[0053] The deflector 4 is disc-shape...

Embodiment 3

[0058] below, in figure 1 In the sprinkler head shown, the creep characteristics (referred to as a strength test) and the operating temperature of the thermally decomposed part were measured for each alloy composition.

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Abstract

As the test temperature of a strength test for a sprinkler head is close to the melting temperature of a solder alloy of a thermal-induction decomposition part for the sprinkler head, thus a high-temperature area working on an automatic sprinkler is required to have creeping properties. However, compared with the past Pb or Cd sprinkler head, the sprinkler head not made of a Pb or Cd In-base alloy can not reach the creeping properties of the high-temperature area working on the automatic sprinkler, and sometimes the endurance test is unqualified. In the invention, alloy for a thermo-sensitive material fused at the temperature of 70-75 DEG C of the thermal-induction decomposition part for the sprinkler head comprises the following components by mass percent: 0.1-2.0% of Sn, 31-37% of Bi, the balance of In-base alloy; and alloy for a thermo-sensitive material fused at the temperature of 90-95 DEG C comprises the following components by mass percent: 0.05-0.4% of Zn, 43-55% of Bi and the balance of In-base alloy.

Description

[0001] This application is a divisional application of the application dated August 2, 2005, the application number 200580048820.7, and the title of the invention is "thermosensitive material and sprinkler head using the same". technical field [0002] The present invention relates to a sprinkler head for extinguishing fire by sprinkling water when a fire breaks out. Background technique [0003] In the sprinkler head, the thermally decomposed part decomposes under the abnormally high temperature of the fire, and the valve body held in the thermally decomposed part is opened to sprinkle water to extinguish the fire. There are liquid and low-melting-point alloys as heat-sensitive materials used in the heat-sensitive decomposition part of the sprinkler head. [0004] Ethanol is used as the heat-sensitive material when the liquid is used in the heat-sensitive decomposition part of the sprinkler head. The thermosensitive decomposition part using ethanol is called a glass valve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C28/00A62C37/11
Inventor 菊池哲郎加藤力弥
Owner SENJU METAL IND CO LTD
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