Sprinkler head
A sprinkler head adapted for a specific yield temperature. The sprinkler head uses a heat-sensitive material composed of Sn in an amount of 0.1-2.0% by mass, Bi in an amount of 31-37% by mass and In for balance for a temperature range around 70-75° C. or a heat-sensitive material composed of Zn in an amount of 0.05-0.4% by mass, Bi in an amount of 43-55% by mass and In for balance for a temperature range around 90-95° C.
1. A sprinkler head adapted for a yield temperature in a range of 70-75° C., the sprinkler head being a compression type sprinkler head and including a main body defining a valve seat, a valve element normally seated on the valve seat, and a heat-sensitive decomposition structure connected to the valve element,
the heat-sensitive decomposition structure including a metal cylinder, a heat sensitive material disposed in the metal cylinder, and a plunger having an end positioned against the heat sensitive material,
wherein the heat-sensitive material comprises a low-melting point alloy composed of Sn in an amount of 0.1-2.0% by mass, Bi in an amount of 31-37% by mass and In for balance.
2. A sprinkler head in accordance with claim 1 , wherein said heat-sensitive material further includes at least one or more elements for improving the strength in a total amount no more than 2.0% by mass, said at least one or more elements being selected from a group of elements consisting of Cu in an amount of 0.1-1.0% by mass, Sb in an amount of 0.2-2.0% by mass, Ge in an amount of 0.1-1.0% by mass, Ag in an amount of 0.1-0.7% by mass, Au in an amount of 0.1-0.6% by mass, Zn in an amount of 0.2-0.6% by mass, La group in an amount of 0.01-0.1% by mass, and Ni in an amount of 0.02-0.1% by mass.
3. A sprinkler head in accordance with claim 1 , wherein said heat-sensitive material further includes at least two or more elements for improving the strength in a total amount no more than 2.0% by mass, said at least two or more elements being selected from a group of elements consisting of Cu in an amount of 0.1-1.0% by mass, Sb in an amount of 0.2-2.0% by mass, Ge in an amount of 0.1-1.0% by mass, Ag in an amount of 0.1-0.7% by mass, Au in an amount of 0.1-0.6% by mass, Zn in an amount of 0.2-0.6% by mass, La group in an amount of 0.01-0.1% by mass, and Ni in an amount of 0.02-0.1% by mass.
4. A sprinkler head adapted for a yield temperature in a range of 90-95° C., the sprinkler head being a compression type sprinkler head and including a main body defining a valve seat, a valve element normally seated on the valve seat, and a heat-sensitive decomposition structure connected to the valve element,
the heat-sensitive decomposition structure including a metal cylinder, a heat sensitive material disposed in the metal cylinder, and a plunger having an end positioned against the heat sensitive material, wherein the heat-sensitive material comprises a low-melting point alloy composed of Zn in an amount of 0.05-0.4% by mass, Bi in an amount of 47-55% by mass and In for balance.
5. A sprinkler head in accordance with claim 4 , wherein said heat-sensitive material further includes at least one or more elements for improving the strength in a total amount no more than 2.0% by mass, said at least one or more elements being selected from a group of elements consisting of Cu in an amount of 0.1-1.0% by mass, Sb in an amount of 0.2-2.0% by mass, Ge in an amount of 0.1-1.0% by mass, Ag in an amount of 0.1-0.7% by mass, Au in an amount of 0.1-0.6% by mass, Zn in an amount of 0.2-0.6% by mass, La group in an amount of 0.01-0.1% by mass, and Ni in an amount of 0.02-0.1% by mass.
6. A sprinkler head in accordance with claim 4 , wherein said heat-sensitive material further includes at least two or more elements for improving the strength in a total amount no more than 2.0% by mass, said at least two or more elements being selected from a group of elements consisting of Cu in an amount of 0.1-1.0% by mass, Sb in an amount of 0.2-2.0% by mass, Ge in an amount of 0.1-1.0% by mass, Ag in an amount of 0.1-0.7% by mass, Au in an amount of 0.1-0.6% by mass, Zn in an amount of 0.2-0.6% by mass, La group in an amount of 0.01-0.1% by mass, and Ni in an amount of 0.02-0.1% by mass.