Rupture disc device and method of assembly thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-017/40
B23K-009/028
B23K-015/00
F16K-017/16
출원번호
US-0344314
(2016-11-04)
등록번호
US-10228069
(2019-03-12)
발명자
/ 주소
Wilson, Alan T.
Franks, Hunter
Hentzen, Brandon
Kmitta, Michael
Blackmon, Mark Randall
Evans, Robert
출원인 / 주소
Oklahoma Safety Equipment Company, Inc.
대리인 / 주소
Fitch, Even, Tabin & Flannery LLP
인용정보
피인용 횟수 :
0인용 특허 :
106
초록▼
A rupture disc device and method of assembly thereof are provided. The rupture disc device has a device body formed so that there are no leakage pathways to the radially outer surface thereof. The rupture disc is welded to the device body so that the weld joint therebetween is not relied upon to pro
A rupture disc device and method of assembly thereof are provided. The rupture disc device has a device body formed so that there are no leakage pathways to the radially outer surface thereof. The rupture disc is welded to the device body so that the weld joint therebetween is not relied upon to provide structural support, and instead strictly acts as a seal. In one form, the weld joint is formed with the weld beam directed axially transverse to thickness of the rupture disc to minimize unwanted variances in the rupture disc burst pressure that otherwise may be created due to the heat generated during weld joint formation.
대표청구항▼
1. A pressure relief device comprising: a device body having an inlet and an outlet, an outer surface, and a linearly extending throughbore having opposite ends at which the inlet and outlet are disposed;a rupture disc having a frangible dome wall portion and a periphery; anda weld joint between the
1. A pressure relief device comprising: a device body having an inlet and an outlet, an outer surface, and a linearly extending throughbore having opposite ends at which the inlet and outlet are disposed;a rupture disc having a frangible dome wall portion and a periphery; anda weld joint between the periphery of the rupture disc and the device body spaced inwardly of the outer surface of the device body such that the frangible dome wall portion is oriented to block flow through the linearly extending throughbore of the device body,wherein the device body has an annular configuration including a seat member with a recessed seat portion having an upstanding annular wall portion extending therearound, and a retaining ring member configured to be received by the recessed seat portion of the seat member such that a portion of the rupture disc is disposed between the seat member and the retaining ring member,and the weld joint between the rupture disc periphery and the device body is spaced radially inwardly from the upstanding annular wall portion. 2. The pressure relief device of claim 1, wherein the rupture disc has a reverse acting configuration so that a convex surface of the frangible dome wall portion is oriented toward the inlet. 3. The pressure relief device of claim 1, wherein the device body has a two-piece construction with one of the seat member and the retaining ring member of the device body having the weld joint with the rupture disc to form a subassembly, and another weld joint formed between the one member of the subassembly and another member of the device body. 4. The pressure relief device of claim 3, wherein the weld joint between the device body members being a structural weld joint that is larger than the weld joint between the rupture disc and the one member of the device body. 5. The pressure relief device of claim 3, wherein the weld joints block a tortuous leakage pathway from the throughbore to the device body outlet including a radial section along the rupture disc to the weld joint thereof with the one member of the device body and an axial section between the weld joints. 6. The pressure relief device of claim 1, wherein the weld joint between the rupture disc periphery and the device body is-spaced radially inwardly from the upstanding annular wall portion provides for clearance for an axial weld beam for forming the weld joint. 7. The pressure relief device of claim 1, further comprising a second weld joint between the retaining ring member and the seat member. 8. The pressure relief device of claim 7, wherein the weld joint is between the rupture disc and the seat member. 9. The pressure relief device of claim 8, wherein a radially outer corner of the retaining ring member is chamfered so as to be adjacent to and spaced from the weld joint with the retaining ring member and the seat member welded together with the second weld joint. 10. The pressure relief device of claim 8, wherein the recessed seat portion includes an axially facing shoulder surface with a recessed annular pocket therein such that a step surface extends between the recessed annular pocket and an adjacent portion of the shoulder surface disposed radially outwardly of the recessed annular pocket, wherein the recessed annular pocket has a diameter sized to receive the rupture disc therein and the first weld is at least partially between the rupture disc and the step surface. 11. The pressure relief device of claim 7, wherein the weld joint is between the rupture disc and the retaining ring member. 12. The pressure relief device of claim 11, wherein the retaining ring member includes an annular groove at a radially outer corner thereof that is configured to align with a periphery of the rupture disc, the groove providing spacing for the weld joint from the seat member with the retaining ring member and the seat member welded together with the second weld joint. 13. The pressure relief device of claim 7, wherein the weld joints are radially offset and axially spaced from one another. 14. The pressure relief device of claim 1, wherein the rupture disc has a thickness between about 0.001 inches and about 0.037 inches. 15. The pressure relief device of claim 1, further comprising a bolted, flanged assembly, the bolted, flanged assembly mounting the pressure relief device in-line with a pressurized fluid delivery system. 16. A method for assembling a pressure relief device for relieving over-pressure conditions, the method comprising: seating a rupture disc having a frangible dome wall portion in a device body;welding a periphery of the rupture disc and the device body together to form a weld joint therebetween such that the frangible dome wall portion of the rupture disc blocks flow through a linearly extending throughbore of the device body with the weld joint being spaced radially inwardly of an outer surface of the device body; anddisposing a retaining ring member of the device body in a recessed seat portion of a seat member of the device body with a portion of the rupture disc captured between the retaining ring member and the seat member;wherein the recessed seat portion of the seat member includes an upstanding annular wall portion extending therearound and the periphery of the rupture disc is spaced radially inward of the upstanding annular wall portion to provide clearance therefrom so that the weld joint between the periphery of the rupture disc and the device body is spaced radially inward from the upstanding annular wall portion. 17. The method of claim 16, wherein seating the rupture disc in the device body comprises seating the rupture disc within the device body so that a convex surface of the frangible dome wall portion is oriented toward an inlet of the device body and material of the device body is adjacent to and radially outward of the weld joint. 18. The method of claim 16, wherein the device body has a two-piece construction, welding the periphery of the rupture disc and the device body includes forming a subassembly with one of the retaining ring member and the seat member of the device body; and further comprising welding the one member of the device body and another member of the device body together to form another weld joint therebetween. 19. The method of claim 18, wherein welding the members of the device body together comprises welding the members of the device body together to form a structural weld joint therebetween which is larger than the weld joint between the rupture disc and the one member of the device body. 20. The method of claim 16, further comprising: welding the retaining ring member and the seat member together to form a second weld joint therebetween. 21. The method of claim 20, wherein welding the periphery of the rupture disc and the device body together to form the weld joint therebetween comprises welding the periphery of the rupture disc and the seat member together to form the weld joint therebetween. 22. The method of claim 21, wherein welding the rupture disc periphery and the seat member together comprises seating the rupture disc in an annular pocket of the recessed seat portion of the seat member, the annular pocket being recessed with respect to a radially outward shoulder surface of the recessed seat portion; and welding the periphery of the rupture disc and a step surface extending between the annular pocket and the radially outward shoulder surface of the recessed seat portion together to form the weld joint therebetween. 23. The method of claim 21, wherein welding the periphery of the rupture disc and the seat member together to form the weld joint therebetween comprises welding in a direction transverse to a wall thickness of the rupture disc. 24. The method of claim 16, wherein welding the periphery of the rupture disc and the device body together to form the weld joint therebetween comprises welding the periphery of the rupture disc and the retaining ring member together to form the weld joint therebetween. 25. The method of claim 24, wherein welding the periphery of the rupture disc and the retaining ring member together comprises welding the periphery of the rupture disc and an inner surface of an annular groove at a radially outer corner of the retaining ring member together to form the weld joint therebetween.
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