KR20080023001A - An alloys using heat sensivity element of sprinkler - Google Patents

Abstract

Alloy composition for a heat sensitivity element of a sprinkler is provided to manufacture the heat sensitivity element by using predetermined composition of harmlessness materials instead of noxious materials, so that a human being is not exposed to the noxious materials, and the heat sensitivity element matches with world wide trend to ban the use of harmful metal. A heat sensitivity element is made of Bi in the range of 32.8 weight% to 49.6 weight%, Si in the range of 12.7 weight% to 24.52 weight%, In in the range of 33.88 weight% to 39.0 weight%, Zn in the range of 2.8 weight% to 3.47 weight% of Zn, and Ag in the range of 0.3 weight% to 3.8 weight%. The heat sensitivity element is made of Bi having 35.8 weight%, Sn having 21.2 weight%, In having 39 weight%, Ag having 0.53 weight%, and Zn having 3.47 weight%. The heat sensitivity element consists of 44.5weight% Bi, 12.8 weight% Sn, 39 weight%In, 0.3 weight% Ag, and 3.4weight% Zn.

Description

Sprinkler thermal element alloy composition {An alloys using heat sensivity element of sprinkler}

1 is an exemplary view of a sprinkler using the heat-sensitive body of the present invention.

2 is a graph showing the melting point of the thermal element according to an embodiment of the present invention

Figure 3 is a test report of the operation test for the thermal element of the present invention.

Figure 4a is a test report for the thermal element of the present invention.

FIG. 4b is a result of the test of the thermal element of FIG. 4a

<Description of Signs on Main Parts of Drawings>

10: sprinkler 20: thermal element

30: thermal plate 40: deflector

The present invention relates to a thermal element used in a fire extinguishing sprinkler, and more particularly, a thermal element to fix a thermal plate of a sprinkler installed at a ceiling or a wall of a building to extinguish a fire at an early stage when a fire occurs. Sprinkler heat to prevent the damage from lead or cadmium toxic by making the composition of Bi, Sn, in, Zn, Ag without alloying lead and cadmium, which causes harmful substances to human body It relates to a sieve alloy composition.

Conventionally, the thermal element for fixing the sprinkler's thermal plate has been used in which lead (Pb) or lead and cadmium (Cd) are alloyed. However, lead and cadmium contain substances that are harmful to the human body. It is being replaced by a thermal element of the material.

Therefore, the sprinkler has been used to heat the alloy in the thermal composition of the lead material (Pb), which is a suitable and easy-to-process metal material, because the thermal element should be melted and separated at an operating temperature of 72 ℃ ± 3 in case of fire.

The lead used as the heat sensitive body is classified into a lead that is melted at a temperature lower than a melting temperature (327 ° C.) and light lead having a melting temperature of about 450 ° C. or more.

The solder is melted at a low temperature, so it melts at a temperature of 72 ° C ± 3 in case of fire and is alloyed with other materials to form a thermal element to operate the sprinkler.

Therefore, sprinkler is installed and used in buildings around the world as the initial disaster prevention facility.In developed countries, sprinkler material is used to study the harmful effects on the human body. As a situation in which Kartium is harmful to the human body and is going to prohibit it, finding a alloy to replace lead and cadmium in the composition of the thermal element used as the fuser of the sprinkler has emerged as a realistic problem.

In view of the above problems, the present invention is made of a composition of Bi, Sn, in, Zn, Ag without the use of lead and cadmium, which causes harmful substances to the human body when manufacturing the thermal element fixing the thermal plate of the sprinkler. Therefore, it is possible to provide a sprinkler thermosensitive alloy composition capable of preventing human exposure from lead poisoning and simultaneously responding to the global trend of banning the use of metals containing harmful substances.

Hereinafter, the present invention will be described in detail.

The thermal element fixing the thermal plate and the deflector of the sprinkler is bismuth (Bi) 32.8 to 49.6 wt%, tin (Si) 12.7 to 24.52 wt%, indium (In) 33.88 to 39.0 wt%, zinc (Zn) 2.8 to 3.47 It is comprised by weight% and 0.3-3.80 weight% silver (Ag).

The bismuth (Bi) and tin (Sn) interacts with each other to lower the rise to the solidus line of the melting point (232 ℃) of tin, when the bismuth content of 32.8% by weight or less is mixed in case of fire The sieve melts below the set temperature of 72 ℃ ± 3, and if 49.6% by weight or more is mixed, the thermal element will not be separated at the temperature of 72 ℃ ± 3, so bismuth 32.8 to 49.6% by weight and tin (Si) 12.7 to 24.52 Ideally, when mixed in weight percent, it has a melting point and curability.

In other words, the speed of flame spreading varies greatly depending on the material and external wind effects. However, when the temperature of a building material is burned at a temperature of 90 ° C. or less, the flame does not spread rapidly. The spreading is delayed, but if the temperature is over 100 ℃, the spreading speed of the flame is rapidly made and burns the surroundings within 5 minutes and 10 minutes.

Therefore, the sprinkler installed in the building is fired and the thermal element melts at the initial temperature of 72 ℃ ± 3, and extinguish within 5 to 15 seconds, so that the initial extinguishing is successful. The mixing content of bismuth (Bi) and tin (Si) is very important because the thermal element must be fixed so as not to operate.

 Bismuth (Bi), also known as bismuth, has a specific gravity of 9.8 and a melting point of 271 ° C. It is soft like lead, but not addictive and mixed with ferrite, antimony and tin. Bismuth is derived from the Arabic word "wiss majaht" which means a metal that melts as easily as benzoin, or from the old idiom "wiesmatte" used by miners because the ore forms a beautiful vein. It is computed in a glass state as natural bismuth, but it is also computed as bizarre, whirling and so on.

 Tin (Sn) has a specific gravity of 7.3 and a melting point of 232 ° C. It is made by reducing the main garnet with carbon, and is a white flexible metal that is stable and easy to process in air, and is used as a fusible alloy in the present invention. It was.

Indium (In) is mainly found only in sulfide minerals such as cinnamonite, and is not present in the hydrosphere and the biosphere. Naturally, there are isotopes indium l13 (4.28%) and l15 (95.72%).

Indium is a silver-white lead-soft metal that can be cut with a knife because it is the softest of any stable solid metal at room temperature. It is also easy to process and can be made into any shape. It does not react with alkaline aqueous solutions, but with acid dissolves. The compound is stable in trivalent form. Used in aircraft sleeve bearings, indium plating for bearings, molten alloys, alloys for sealing glass, and the like, oxides and sulfides are semiconductors and are widely used in the electronics industry. Moreover, it is used as fillers, such as a hen egg base and denture, in the form added to the alloy.

Its chemical properties are similar to those of aluminum and dissolve in acids and alkalis to produce hydrogen. Because of its low melting point, it can easily become liquid at high temperatures. It is relatively stable in air and does not erode in water.

It is also found in coal ash and is obtained as a byproduct when extracting germanium. It is used as a filler for thermometers as a single element material or as an alloy with a low melting point, and is used as a substitute for mercury as an alloy and also as a material for semiconductors.

Zinc (Zn) has a specific gravity of 7.14 and a melting point of 420 ° C. At room temperature, zinc (Zn) is plated on a steel sheet with a soft gray-white metal to form a tin plate, and is used for buckets, signboards, rain gutters, and tin roofs.

Silver (Ag) has a specific gravity of 20.5 and a melting point of 960 ° C. It is a white metal. It has excellent malleability and is the best conductor of heat and electricity. It is used to make various ornaments, utensils, and coins by alloying with copper. It is used for materials such as metal and silver plating.

Such silver is used as a material to increase the bonding strength of the composition in the present invention was used as a heat-sensitive material of the composition using 0.3 to 0.53% by weight so that it can be melted at a predetermined temperature.

The alloy of the thermosensitive composition made as described above may be prepared by mixing in various forms.

Therefore, according to the embodiment of the present invention will be described according to the embodiment on the basis of the temperature 72 ℃ ± 3 of the melting point (melting point) as follows.

Example 1

Melting point The heat-sensitive composition of the thermally conductive composition at 69-70 ° C is 35.8% by weight of bismuth (Bi), 21.2% by weight of tin (Sn), 39% by weight of indium (In), 0.53% by weight of silver (Ag) and 3.47% by weight of zinc. Alloy was prepared to produce a sprinkler thermal element. The bismuth was 32.8 to 49.6% by weight in the total composition, but in Example 1, 35.8% by weight was used to measure the rapid powder for accurate mixing. As a result of melting the metal powder of the mixed thermal element in the usual way and using it as a thermal element of the sprinkler, the heat-sensing plate, support, bolt, etc., which melts without any abnormality and supports the sprinkler are separated. At the same time, the deflector descends and the water can be sprayed.

Example 2

Melting point The sputter sprinkler was manufactured by alloying a metal powder of bismuth with 44.5% by weight, 12.8% by weight, 39% by weight, 0.3% by weight of silver and 3.4% by weight of zinc at 69-70 ° C.

Example 3

A sprinkler thermal element was prepared by alloying a metal powder of bismuth 40 wt%, tin 19 wt%, indium 39 wt%, and silver 2 wt% at a melting point of 71 ° C.

Example 4

A sprinkler heat-sensing body was prepared by alloying bismuth 40% by weight, 17.2% by weight of tin, 39% by weight of indium, and 3.8% by weight of silver at a melting point of 71 ° C.

Example 5

Melting point 71 ℃ sputter sprinkler was prepared by alloying the metal composition of the bismuth 44.5% by weight, tin 12.7% by weight, indium 39% by weight, silver 3.8% by weight.

Example 6

Melting Point The composition of the heat sensitive body at 72 ° C.-73 ° C. was prepared by alloying metal powder of bismuth 47.5% by weight, 13.52% by weight tin, and indium 39.08% by weight to prepare a sprinkler heat sensitive body.

Example 7

Melting point 74 ° C-76 ° C The thermosensitive composition was prepared by alloying a metal powder of 39.6% by weight of bismuth, 24.05% by weight tin, 35.95% by weight of indium to produce a sprinkler thermal element.

Example 8

Melting point 74 ° C-76 ° C The thermosensitive composition was prepared by sprinkling the thermal alloy by alloying metal powder of bismuth 39.6% by weight, tin 24.52% by weight, indium 33.88% by weight, silver 2% by weight.

The above embodiment is shown as a table | surface as follows.

  division  Melting Point ℃    Bi (%)    Sn (%)    In (%)    Ag (%)    Zn (%)  Example 1   69-70    35.8    21.2    39    0.53    3.47  Example 2   69-70    44.5    12.8    39    0.3    3.4  Example 3     71    40    19    39    2     -  Example 4     71    40    17.2    39    3.8     -  Example 5     71    44.5    12.7    39    3.8     -  Example 6   72-73    47.4    13.52    39.08     -     -  Example 7   72-73    39.6    24.05    35.95     -     -  Example 8   74-76    39.6    24.52    33.88     2     -

As can be seen from the above examples, Examples 1 and 2 were prepared by alloying bismuth, tin, indium, silver, and zinc as a composition. Bismuth, tin, and indium were used as main compositions, and silver and zinc were used. The sprinkler was separated by melting at 69-70 ° C. to prevent curing of the thermal element by mixing.

In the case of Examples 1 and 2, it is determined that the melting temperature of the heat-sensitive body is 69-70 ° C., which is preferable to use as a sprinkler heat-sensitive body.

In addition, in Examples 3 to 5, when the heat-sensitive body was manufactured using only bismuth, tin, indium, and silver except for zinc as a composition, the melting temperature was 71 ° C., even though zinc was excluded. Melt at the sprinkler and was operated separately.

In Examples 6 and 7, except for silver and zinc, the mixing ratio of bismuth and indium was lowered and the mixing ratio of tin was increased. As a result, the sprinkler was separated by melting the heat sensitive body at 72-73 ° C.

As can be seen in Examples 6 and 7, when the mixing ratio of tin is high, it can be seen that the melting temperature is increased because the heat-sensitive body is formed hard.

In addition, in the case of Example 8, the sprinkler was melted at 74-76 ℃ to form a heat-sensitive body was obtained by mixing the silver while increasing the mixing ratio of tin and slightly lowering the ratio of indium. As seen in Example 8, the higher the mixing ratio of tin and silver was, the higher the melting temperature was confirmed.

As described above, even though lead (Pb) and cadmium (Cd) are not used in the composition forming the thermal element of the sprinkler, the sprinkler thermal element is manufactured using the compositions of Examples 1 to 8. You can see. By removing lead harmful to the human body, it prevents exposure to heavy metals by sprinkler thermal elements installed in offices, houses, and buildings.

Hereinafter, the accompanying drawings of the present invention will be described.

1 is an exemplary view of a sprinkler using the heat-sensitive body of the present invention, wherein the heat-sensitive body 20 of the present invention is applied to the sprinkler 10, and in case of fire, the heat-sensitive plate 30 is heated by flame or heat and thus the temperature is 72 ° C. ±. When it reaches 3, the heat-sensitive body 20 melts, and components such as the heat-sensitive plate 30 are separated, so that the deflector 40 located inside the sprinkler head is located at the bottom and the water can be sprayed to extinguish the fire.

Figure 2 is a graph showing the melting point of the heat-sensitive body according to an embodiment of the present invention, it is a graph showing the melting point of the heat-sensitive body formed by the composition of Examples 1 to 8 according to the temperature.

3 is a test report for testing the operation of the thermal element of the present invention, after testing the sprinkler to which the thermal element of the present invention is tested, whether the thermal element melts at a predetermined temperature and tested normally by the Small and Medium Business Administration to be.

Figure 4a is a test report for the thermal element of the present invention, Figure 4b is a test result for the thermal element test for Figure 4a, which is a test report confirming that the quality of the thermal element for quality control works without error.

Thus, the present invention replaces bismuth, tin, indium, silver, and zinc except for lead and cadmium in manufacturing the thermal element used in the sprinkler, thereby preventing exposure from lead (Pb), which is harmful to the human body. At the same time, there is an effect that can be appropriately substituted for the global use of hazardous metals.

Claims (9)

In the thermal element of the sprinkler, Bismuth (Bi) 32.8 to 49.6 wt%, Tin (Si) 12.7 to 24.52 wt%, Indium (In) 33.88 to 39.0 wt%, Zinc (Zn) 2.8 to 3.47 wt%, Silver (Ag) 0.3 to 3.8 wt% Sprinkler thermal element alloy composition, characterized in that the composition. The method of claim 1, The heat-sensitive body is sprinkler heat-sensitive material, characterized in that composed of bismuth (Bi) 35.8%, tin (Sn) 21.2% by weight, indium (In) 39% by weight, silver (Ag) 0.53% by weight, zinc 3.47% by weight Alloy composition. The method of claim 1, The heat-sensitive body is sprinkler thermosensitive alloy composition, characterized in that 44.5% by weight, 12.8% by weight, 39% by weight, 0.3% by weight silver, 3.4% by weight zinc. In the thermal element of the sprinkler, Bismuth 40% by weight, 19% by weight tin, 39% by weight indium, 2% by weight of silver sprinkler thermal alloy composition. The method of claim 4, wherein The heat-sensitive body is sprinkler thermosensitive alloy composition, characterized in that composed of 40% by weight of bismuth, 17.2% by weight of tin, 39% by weight of indium, 3.8% by weight of silver. The method of claim 4, wherein The heat-sensitive body is sprinkler thermosensitive alloy composition, characterized in that 44.5% by weight of bismuth, 12.7% by weight of tin, indium 39% by weight, silver 3.8% by weight. In the thermal element of the sprinkler, A sprinkler thermosensitive alloy composition comprising 47.5% by weight of bismuth, 13.52% by weight of tin, and 39.08% by weight of indium. The method of claim 7, wherein The heat-sensitive body is sprinkler thermosensitive alloy composition, characterized in that the composition is composed of 39.6% by weight of bismuth, 24.05% of tin, 35.95% by weight of indium. The method of claim 4, wherein The heat-sensitive body is sprinkler thermosensitive alloy composition, characterized in that the composition is composed of 39.6% by weight of bismuth, 24.52% by weight of tin, 33.88% by weight of indium, 2% by weight of silver.

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