초록 ▼

A novel PRD (pressure relief device) design called fuse plug which is creep-resistant and leakage-free is developed to improve the thermal response of PRD to fire when it is used as a temperature safety device for valves, cylinders, pressurized pipes, or any pressure vessels, the new design being th

A novel PRD (pressure relief device) design called fuse plug which is creep-resistant and leakage-free is developed to improve the thermal response of PRD to fire when it is used as a temperature safety device for valves, cylinders, pressurized pipes, or any pressure vessels, the new design being the combination of geometrical configuration of PRD structure and composite technology wherein the low-melting matrix alloy is dispersed with strong/stiff reinforcing agents such as cut-wire type aggregates/cylinders and such composite alloy is contained in a threaded/rugged cavity with the length/diameter ratio being greater than a minimum. The new design employs a disc-type seal T backed by the composite alloy, thus allowing the use of this new design for cylinders of poor thermal conductivity. The trapping of the expelled alloy slug in case of fire with the straight cavity-only design is achieved by using a tee hardware having the secondary venting tube attached to its straight part of tee, the geometry of said tube being curved/angled like a snail or helix or spiral, while the branch-tee is used for the primary venting pipe connection.

대표청구항 ▼

[ What is claimed is:] [1.] A thermally activated pressure relief fuse plug apparatus for protecting a pressure vessel or any pressurized hardwares, the fuse plug apparatus comprising:a fuse plug housing having a gas venting port and further having a hollow internal space and also having a cavity co

[ What is claimed is:] [1.] A thermally activated pressure relief fuse plug apparatus for protecting a pressure vessel or any pressurized hardwares, the fuse plug apparatus comprising:a fuse plug housing having a gas venting port and further having a hollow internal space and also having a cavity containing a fusible composite alloy and also having a threaded neck opening for engagement with a pressure vessel, or a valve attached to said pressure vessel, said internal space containing a sealing device;said sealing device being pressed against an O-ring at one end to seal the threaded neck opening in the housing, the sealing device having another end pressed tight against the fusible composite alloy in the cavity,said cavity holding said composite alloy, said cavity having a roughened wall structure being selected from the group consisting of a threaded wall, rugged wall, and nonslipping wall; andsaid composite alloy filling the cavity, said composite alloy being a mixture of fusible alloy matrix and reinforcing agents.