Fusible plug type pressure relief valve

Patent metadata

Field	Value
Publication number	US-2016010758-A1
Application number	US-201414770976-A
Country	US
Kind code	A1
Filing date	Jan 28, 2014
Priority date	Mar 4, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A fusible plug type pressure relief valve includes a housing, a valve element, a spring member, and a fusible piece. A valve passage is formed in the housing. A valve element is arranged at a closed position in the housing, the closed position being a position at which the valve element closes the valve passage. The valve element is movable to an open position at which the valve element opens the valve passage. The spring member presses the valve element in an open direction. The fusible piece supports the valve element against pressing force of the spring member. The fusible piece melts at not less than a predetermined melting temperature. An inner surface of a concave portion of the fusible piece contacts the valve element. The concave portion includes a tapered portion inclined relative to an axis line of the valve element.

First claim

1 . A fusible plug type pressure relief valve comprising:
a housing in which a valve passage is formed; a valve element arranged at a closed position in the housing and movable to an open position, the closed position being a position at which the valve element closes the valve passage, the open position being a position at which the valve element opens the valve passage; a pressing member configured to press the valve element in an open direction that is a direction from the closed position toward the open position; and a supporting body supporting the valve element against pressing force of the pressing member and configured to melt at not less than a predetermined melting temperature, a contact surface of the supporting body contacting the valve element to support the valve element, and the contact surface of the supporting body including an inclined portion inclined relative to an axis line of the valve element.

2 . The fusible plug type pressure relief valve according to claim 1 , wherein:
the supporting body includes a concave portion located at the valve element side; the valve element includes a convex portion located at the supporting body side, the convex portion being fitted in the concave portion; an inner peripheral surface of the concave portion contacts an outer peripheral surface of the convex portion to constitute the contact surface; and the contact surface includes the inclined portion inclined relative to the axis line of the valve element.

3 . The fusible plug type pressure relief valve according to claim 1 , wherein:
the valve element includes a concave portion located at the supporting body side; the supporting body includes a convex portion located at the valve element side, the convex portion being fitted in the concave portion; an outer peripheral surface of the convex portion contacts an inner peripheral surface of the concave portion to constitute the contact surface; and the contact surface includes the inclined portion inclined relative to the axis line of the valve element.

4 . The fusible plug type pressure relief valve according to claim 2 , wherein each of the convex portion and the concave portion has a substantially truncated cone shape.

5 . The fusible plug type pressure relief valve according to claim 2 , wherein each of the convex portion and the concave portion has a substantially partially spherical shape.

6 . The fusible plug type pressure relief valve according to claim 1 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

7 . A fusible plug type pressure relief valve comprising:
a housing in which a valve passage is formed; a valve element arranged at a closed position in the housing and movable to an open position, the closed position being a position at which the valve element closes the valve passage, the open position being a position at which the valve element opens the valve passage; a pressing member configured to press the valve element in an open direction that is a direction from the closed position toward the open position; a supporting body supporting the valve element against pressing force of the pressing member and configured to melt at not less than a predetermined melting temperature; and a porous member interposed between the supporting body and the valve element, the supporting body including a contact surface between the supporting body and the porous member and contacting the porous member to support the valve element.

8 . The fusible plug type pressure relief valve according to claim 7 , wherein the porous member is a porous body or wire mesh mold product which is constituted by ceramics or a sintered member.

9 . A fusible plug type pressure relief valve comprising:
a housing in which a valve passage is formed; a valve element arranged at a closed position in the housing and movable to an open position, the closed position being a position at which the valve element closes the valve passage, the open position being a position at which the valve element opens the valve passage; a pressing member configured to press the valve element toward the open position from the closed position; and a supporting body supporting the valve element against pressing force of the pressing member and configured to melt at not less than a predetermined melting temperature, the supporting body including a supporting surface which contacts and is supported by the housing, and the supporting surface is inclined relative to an open direction.

10 . The fusible plug type pressure relief valve according to claim 3 , wherein each of the convex portion and the concave portion has a substantially truncated cone shape.

11 . The fusible plug type pressure relief valve according to claim 3 , wherein each of the convex portion and the concave portion has a substantially partially spherical shape.

12 . The fusible plug type pressure relief valve according to claim 2 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

13 . The fusible plug type pressure relief valve according to claim 3 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

14 . The fusible plug type pressure relief valve according to claim 4 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

15 . The fusible plug type pressure relief valve according to claim 5 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

16 . The fusible plug type pressure relief valve according to claim 10 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

17 . The fusible plug type pressure relief valve according to claim 11 , wherein:
the supporting body includes a supporting surface which contacts and is supported by the housing; and the supporting surface is inclined relative to the axis line of the valve element.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nomichi Kaoru
• Suzuki Yutaka
• Ninomiya Makoto

Classifications

• F16K17/383 Primary

  the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug (F16K17/386 takes precedence) · CPC title

• F16K24/04

  for venting only (F16K24/02 takes precedence) · CPC title