Swivel bayonet joint for cryogenic fluids
First Claim
1. A swivel bayonet joint for transferring cryogenic fluids, comprising:
- a. a male bayonet joint including an insertion stem having an insertion jacket surrounding and co-axial with a male inner line and secured to the male inner line at an insertion end of the stem, and a first swivel clamp means secured to the insertion jacket adjacent a clamp end of the stem; and
b. a female bayonet joint including an outer jacket surrounding and co-axial with a receiving sleeve, a line end of the receiving sleeve being secured to a female inner line surrounded by and co-axial with the outer jacket, and a second swivel clamp means secured adjacent a clamp end of the receiving sleeve for clamping to the first swivel clamp means to secure the male and female bayonet joints together in a swivel relationship, so that the joints may swivel in relation to each other about an axis parallel to flow of the cryogenic fluid through the male and female inner lines, wherein the insertion stem is dimensioned to establish a high tolerance fit within the receiving sleeve along a first axial length from the clamp end to the insertion end of the stem, the first axial length being a length sufficient for formation of a vapor trap of cryogenic fluid along the first axial length between its insertion end and the clamp end of the receiving sleeve, so that the cryogenic fluid cannot move beyond the vapor trap to cool mechanical components of the first and second clamp means.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and system for dispensing cryogenic fluids, such as liquified natural gas (LNG), using a swivel bayonet joint interconnecting first and second sections of cryogenic pipe. The swivel bayonet joint includes a male bayonet joint and a corresponding female bayonet joint. An insertion stem of the male bayonet joint is dimensioned to have a very high tolerance fit within the receiving sleeve of the female joint that extends a sufficient length for formation of a vapor trap by the cryogenic fluid between the insertion end of the stem and the clamp end of the receiving sleeve. The vapor trap prohibits movement beyond the vapor trap of any cryogenic fluid passing through the joint, consequently, elastomeric seals in the bayonet joint remain insulated from extremely cold temperatures of the cryogenic fluid.
33 Citations
17 Claims
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1. A swivel bayonet joint for transferring cryogenic fluids, comprising:
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a. a male bayonet joint including an insertion stem having an insertion jacket surrounding and co-axial with a male inner line and secured to the male inner line at an insertion end of the stem, and a first swivel clamp means secured to the insertion jacket adjacent a clamp end of the stem; and b. a female bayonet joint including an outer jacket surrounding and co-axial with a receiving sleeve, a line end of the receiving sleeve being secured to a female inner line surrounded by and co-axial with the outer jacket, and a second swivel clamp means secured adjacent a clamp end of the receiving sleeve for clamping to the first swivel clamp means to secure the male and female bayonet joints together in a swivel relationship, so that the joints may swivel in relation to each other about an axis parallel to flow of the cryogenic fluid through the male and female inner lines, wherein the insertion stem is dimensioned to establish a high tolerance fit within the receiving sleeve along a first axial length from the clamp end to the insertion end of the stem, the first axial length being a length sufficient for formation of a vapor trap of cryogenic fluid along the first axial length between its insertion end and the clamp end of the receiving sleeve, so that the cryogenic fluid cannot move beyond the vapor trap to cool mechanical components of the first and second clamp means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cryogenic fluid dispensing system for transferring a cryogenic fluid from a storage tank to a fluid user, comprising:
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a. a pump control housing for housing control switches for conducting the cryogenic fluid out of the storage tank; and
,b. A cryogenic fluid dispensing arm secured to a housing cryogenic outlet pipe of the pump control housing, the arm including a swivel bayonet joint interconnecting a first section and a second section of cryogenic pipe for facilitating movement of the arm from a storage position to a dispensing position, and a discharge outlet secured to a distal end of the section of cryogenic pipe farthest from the housing for dispensing the cryogenic fluid into the fluid user, the swivel bayonet joint including; i. a male bayonet joint including an insertion stem having an insertion jacket surrounding and co-axial with a male inner line and secured to the male inner line at an insertion end of the stem, and a first swivel clamp means secured to the insertion jacket adjacent a clamp end of the stem; and ii. a female bayonet joint including an outer jacket surrounding and co-axial with a receiving sleeve, a line end of the receiving sleeve being secured to a female inner line surrounded by and co-axial with the outer jacket, and a second swivel clamp means secured adjacent a clamp end of the receiving sleeve for clamping to the first swivel clamp means to secure the male and female bayonet joints together in a swivel relationship, so that the joints may swivel in relation to each other about an axis parallel to flow of the cryogenic fluid through the male and female inner lines, wherein the insertion stem is dimensioned to establish a high tolerance fit within the receiving sleeve along a first axial length from the clamp end to the insertion end of the stem, the first axial length being a length sufficient for formation of a vapor trap of cryogenic fluid along the first axial length between its insertion end and the clamp end of the receiving sleeve, so that the cryogenic fluid cannot move beyond the vapor trap to cool mechanical components of the first and second clamp means. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method of transferring cryogenic fluid through first and second sections of cryogenic pipe that swivel in relation to each other, comprising the steps of:
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a. securing a male bayonet joint to the first section of cryogenic pipe, the male bayonet joint having an insertion stem with and insertion jacket surrounding and co-axial with a male inner line and secured to the male inner line at an insertion end of the stem and having a first swivel clamp secured to the insertion stem adjacent a clamp end of the stem; b. securing a female bayonet joint to the second section of cryogenic pipe, the female bayonet joint having an outer jacket surrounding and coaxial with a receiving sleeve, a line end of the receiving sleeve secured to a female inner line surrounded by and co-axial with the outer jacket, and a second swivel clamp secured adjacent a clamp end of the receiving sleeve; c. inserting the insertion stem of the male bayonet joint into the receiving sleeve of the female bayonet joint; d. clamping the first and second swivel clamps together so that the first and second sections of cryogenic pipe swivel in relation to each other about an axis parallel to flow of cryogenic fluid through the sections; and e. forming a vapor trap of cryogenic fluid between the insertion stem and the receiving sleeve at a position between the insertion end of the insertion stem and the clamp end of the receiving sleeve so that the vapor trap stops movement of the cryogenic fluid beyond the vapor trap and the cryogenic fluid cannot cool mechanical components of the first and second swivel clamps. - View Dependent Claims (16, 17)
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Specification