Coupling assembly for connecting fluid lines, insert and sleeve for use in coupling assembly, and fluid line connection

Abstract

The invention relates to a coupling assembly for connecting fluid lines, an insert and a sleeve for use in the coupling assembly, and a fluid line connection. The coupling assembly includes a first component having a sleeve including an opening configured to receive the insert, a second component having the insert, and at least one seal disposed between the first component and the second component, the insert is arranged in the sleeve such that a fluid tight connection is provided between the first component and the second component when the insert is arranged in an end position within the sleeve, and wherein the sleeve and / or the insert comprises at least one exhaust opening, the at least one exhaust opening is configured to provide a fluid path from the interior volume of the coupling assembly to the ambient environment when the insert is disposed within the sleeve at a position between the opening and the end position of the sleeve.

Description

Technical Field

[0001] The present invention relates to a coupling assembly for connecting fluid lines, an insert and a sleeve for use in the coupling assembly, and a fluid line connector. Background Art

[0002] Flexible fluid lines with couplings designed to be made and broken can pose a hazard to operators when conveying fluid under pressure. If the coupling is opened while the fluid is under pressure, the force of the escaping fluid can cause the end of the flexible fluid line to whip and injure the operator.

[0003] Conventional couplings such as chain clamps, threaded couplings, flange couplings, and self-sealing couplings are expensive, bulky, require specialized tools to access, and / or reduce the flow diameter and thus prevent the routing of insulating fluid lines through the couplings. In particular, clamped couplings may be blown open when opened under pressure.

[0004] In some applications, lanyards securing fluid lines are used as an additional safety feature to limit movement of the fluid line when the coupling is opened under pressure. However, the lanyard must be properly installed to secure the fluid line. Therefore, lanyards rely on the correct assembly process being followed and are inherently unsafe. Summary of the Invention

[0005] An object of the present invention is to provide a coupling assembly which eliminates the risk of whipping when disconnecting under pressure.

[0006] This object is achieved by the coupling assembly, sleeve, insert and fluid line connection according to the invention. Further advantageous embodiments are described in additional aspects.

[0007] The coupling assembly of the present invention is configured to connect fluid lines. In particular, the coupling assembly is configured to connect a first fluid system or a first fluid line to a second fluid system or a second fluid line.

[0008] The coupling assembly includes a first component having a sleeve, a second component having an insert, and at least one seal.

[0009] The first component comprises a sleeve. It is also conceivable that the sleeve forms the first component. According to an embodiment, the sleeve comprises the shape of a tube, a hollow cylinder or a hollow prism.

[0010] According to the present invention, the sleeve comprises an opening configured to receive the insert.

[0011] The sleeve may comprise a first axial end and a second axial end arranged at opposite sides of the sleeve.In a preferred embodiment, the sleeve comprises an opening at the first axial end and an end wall at the second axial end.

[0012] The second component comprises an insert. It is also conceivable that the insert forms the second component. The insert may comprise the shape of a tube or a hollow cylindrical piece.

[0013] According to an embodiment, the inner diameter of the cavity formed by the sleeve exceeds the outer diameter of the insert. In particular, the insert can be configured to be inserted into the sleeve. In a preferred embodiment, the insert is configured to mechanically engage with the sleeve.

[0014] According to an embodiment of the coupling assembly of the invention, the first component and the second component comprise complementary parts of a coupling mechanism configured to mechanically connect the first component to the second component.

[0015] In particular, the insert and the sleeve may comprise complementary parts of a coupling mechanism configured to mechanically connect the insert to the sleeve. For example, the inner surface of the sleeve may comprise threads configured to mechanically engage threads on an outer surface, particularly a lateral surface, of the insert.

[0016] According to an embodiment, the first portion of the coupling mechanism can be arranged on the first component, and the second portion of the coupling mechanism can be arranged on the second component. The first portion and the second portion can represent complementary parts of the coupling mechanism. In particular, a section of the first portion can be configured to mechanically engage with a section of the second portion.

[0017] The first and second portions of the coupling mechanism may be configured to provide a threaded connection, a clamped connection, a flanged connection, a bayonet engagement, or the like.

[0018] The coupling mechanism may include a safety mechanism configured to prevent the first and second components from flying apart when the coupling assembly is opened under pressure. Preferably, the safety mechanism forms a component of the first portion and / or the second portion. For example, the safety mechanism may include a pin, a ring, etc. It is also conceivable that the safety mechanism corresponds to an additional threaded section of the threaded connection or an additional corner and / or recess of the bayonet connection.

[0019] According to an embodiment, the coupling mechanism comprises a threaded connection, wherein the sleeve comprises female threads and the insert comprises male threads configured to mechanically engage with the female threads of the sleeve.

[0020] Preferably, the female thread is arranged on the inner surface of the sleeve.The male thread may be located on the outer surface, in particular the lateral surface, of the insert.

[0021] A first component comprising an insert configured to be screwed into a sleeve of a second component may advantageously allow the coupling assembly to be assembled in a simple and / or time-saving manner. Furthermore, a coupling mechanism comprising a threaded connection may be cost-effective and / or easy to manufacture.

[0022] At least one seal is arranged between the first component and the second component such that a fluid tight connection is provided between the first component and the second component when the insert is arranged in an end position within the sleeve.

[0023] The at least one seal may comprise or consist of a soft material, preferably a flexible or elastic material. For example, the at least one seal may comprise or consist of an elastomer, in particular a fluoroelastomer (e.g., FKM, FFKM, or FEPM), ethylene propylene diene monomer (EPDM) rubber, nitrile butadiene (NBR) rubber, or the like. However, the at least one seal may also comprise a composite material, a metal, a metal alloy, or a coated metal. In a preferred embodiment, the at least one seal is in the form of an O-ring or a flat gasket.

[0024] It is contemplated that at least one seal is disposed between the first component and the second component such that, when the insert is fully received within the sleeve via the coupling mechanism, the at least one seal closes or seals the gap between the first component and the second component. For example, the insert may be configured to exert a force on the at least one seal when the insert is screwed into the sleeve.

[0025] When the insert is fully contained within the sleeve, a fluid-tight connection between the first component and the second component can be provided. According to the embodiments described below, the insert can be considered to be arranged in an end position within the sleeve when a portion of the insert is in direct mechanical contact with at least one seal and / or compression element. The insert can also be considered to be arranged in an end position within the sleeve when the first component and the second component are fully connected via the coupling mechanism.

[0026] The coupling mechanism can be configured to guide the insert into the opening of the sleeve so that the insert presses against or abuts the at least one seal. For example, the at least one seal can be arranged to be compressed between the first and second components, in particular, between the insert and the sleeve. However, according to the embodiments described below, the at least one seal can also be arranged to be compressed between the insert and another component of the coupling assembly, such as a compression element.

[0027] Preferably, the at least one seal is configured to prevent fluid from escaping from the interior volume enclosed by the coupling assembly when the insert is arranged in an end position within the sleeve. The at least one seal may be configured to seal a gap between the first and second components of the coupling assembly. However, according to the embodiments described below, the at least one seal may also be configured to seal a gap between the insert and the compression element.

[0028] According to the invention, the sleeve and / or the insert comprises at least one vent opening configured to provide a fluid path from the interior volume of the coupling assembly to the surrounding environment when the insert is arranged within the sleeve in a position between the opening and the end position of the sleeve.

[0029] The internal volume of the coupling assembly may refer to a volume enclosed by the first component and / or the second component of the coupling assembly. In particular, the internal volume of the coupling assembly may include a first volume enclosed by the first component and a second volume enclosed by the second component.

[0030] The at least one vent opening can be configured to provide a fluid path from the interior volume of the coupling assembly to the surrounding environment when the insert is arranged within the sleeve such that the insert is spaced apart from the at least one seal. It is also contemplated that the at least one vent opening can be configured to provide a fluid path from the interior volume of the coupling assembly to the surrounding environment when the insert is arranged at a position within the sleeve that is different from an end position. Furthermore, the at least one vent opening can be configured to provide a fluid path from the interior volume of the coupling assembly to the surrounding environment when an end section of the insert is arranged within the sleeve at a predetermined position between the sleeve opening and an end wall of the sleeve.

[0031] In particular, the at least one vent opening can be arranged to provide a fluid path from the interior volume of the coupling assembly to the surrounding environment when the first and second components are moved apart via the coupling mechanism. Preferably, the fluid path is provided without completely separating the first and second components. For example, the at least one vent opening can be configured to provide a fluid path when the insert and sleeve are moved apart by 5%, 10%, 15%, or 20% of the total travel length defined by the coupling mechanism, such as the axial length of the threaded section of the insert or the axial length of the threaded section of a screw connecting the first and second components.

[0032] The at least one vent opening can be a hole, perforation, slot, etc. The at least one vent opening can extend through the material of the sleeve and / or insert. Preferably, the at least one vent opening is arranged on a surface of the sleeve and / or insert such that, while providing a fluid path from the interior volume of the coupling assembly to the surrounding environment via the at least one vent opening, the insert remains mechanically engaged with the sleeve via the coupling mechanism. According to an embodiment, the coupling mechanism is configured to separate the insert from the at least one seal, thereby providing a fluid path from the interior volume of the coupling assembly to the surrounding environment.

[0033] Preferably, the at least one vent opening is arranged to provide a fluid path from the interior volume enclosed by the first and second components to the surrounding environment before the first component is completely disconnected from the second component. For example, the first and / or second parts of the coupling mechanism may include an additional thread segment or additional thread length (i.e., a safety mechanism) configured to maintain the mechanical connection between the first and second parts after the first and second components have moved apart to such an extent that the vent provides a fluid path from the interior volume enclosed by the first and second components to the surrounding environment.

[0034] The coupling assembly of the present invention allows for the release of pressure within a fluid line connected via the coupling assembly while a first component is mechanically connected to a second component. This advantageously reduces or eliminates the risk of injury to an operator opening the coupling assembly. As a further advantage, additional equipment for depressurizing the fluid within the fluid line and additional safety measures can be eliminated.

[0035] Compared with conventional self-sealing couplings, the coupling assembly of the present invention can avoid the reduction of the flow diameter. Therefore, the coupling of the present invention can be advantageously used in cryogenic applications that require the vacuum insulation pipe to be routed through a portion of the coupling assembly.

[0036] The coupling assembly of the present invention can advantageously provide a compact and / or cost-effective connection between fluid lines.The coupling assembly of the present invention can be manufactured using relatively simple manufacturing processes, thereby avoiding expensive manufacturing processes such as welding or complex machining.

[0037] In addition, the coupling assembly of the present invention can provide a larger flow diameter than conventional fluid couplings, in particular self-sealing couplings. Therefore, the pressure loss in the coupling assembly can be advantageously reduced without significantly increasing the external dimensions of the coupling assembly.

[0038] According to an embodiment of the coupling assembly of the invention, the insert comprises a non-threaded section arranged between the first threaded section and the second threaded section.The outer diameters of the first threaded section and the second threaded section exceed the outer diameter of the non-threaded section.

[0039] The non-threaded section may be configured to prevent mechanical engagement with the threaded section of the sleeve when the insert is separated from the sleeve or unscrewed from the sleeve. For example, the inner diameter of the threaded section arranged on the sleeve may exceed the outer diameter of the non-threaded section.

[0040] Preferably, the circumference or outer surface of the non-threaded section is offset or recessed relative to the circumference or outer surface of the first and second threaded sections. For example, when the insert is received in the sleeve, the outer surface of the non-threaded section may be offset or recessed relative to the outer surfaces of the first and second threaded sections to avoid contact with the female threads of the sleeve.

[0041] The non-threaded section can be configured to support the release of pressurized fluid when the insert is unscrewed from the sleeve. In a preferred embodiment, the axial length of the non-threaded section exceeds the axial length of the female thread of the sleeve. Thus, the insert can be disconnected from the sleeve when the second threaded section is unscrewed from the sleeve. In particular, when the second section is unscrewed from the sleeve, the section of the sleeve including the female thread can be loosely arranged between the first threaded section and the second threaded section of the insert. Thus, pressurized fluid can be allowed to pass through the gap between the non-threaded section and the section of the sleeve including the female thread. The first threaded section can be configured to prevent complete separation of the first and second components once the second threaded section has been separated from or unscrewed from the sleeve. The insert can be separated from at least one seal and / or compression element when the second threaded section is disconnected from or unscrewed from the sleeve, thereby providing a fluid path from the internal volume of the coupling assembly to the surrounding environment.

[0042] When providing an insert comprising a non-threaded section arranged between a first threaded section and a second threaded section, the release of pressure from the interior volume of the coupling assembly may be advantageously facilitated.

[0043] According to an embodiment, the coupling assembly of the present invention comprises at least one retaining element configured to prevent movement of the first component along the axis of the fluid line.

[0044] The at least one retaining element may be configured to circumferentially surround the fluid line along a portion of a longitudinal axis of the fluid line.

[0045] Preferably, the at least one retaining element is configured to retain the sleeve in a predetermined relative position relative to the fluid line. The at least one retaining element may correspond to a ring or a tube. Preferably, the at least one retaining element is configured to be attached to the fluid line via a suitable mechanical connection. For example, the at least one retaining element may be crimped, clamped, glued, and / or welded to the fluid line.

[0046] According to an embodiment, the at least one retaining element comprises or consists of a rigid material, such as a polymer, metal or a composite material.

[0047] In a preferred embodiment, the coupling assembly of the present invention includes at least two retaining elements. The at least two retaining elements can be arranged adjacent to the end wall of the sleeve. In particular, the two retaining elements can be arranged to constrain the end wall of the sleeve from two opposite sides. The at least two retaining elements can be configured to be attached to the fluid line via a suitable mechanical connection.

[0048] When providing a coupling assembly comprising a retaining element, the sleeve can be prevented from moving along the axis of the fluid line. Thus, undesired sliding of the sleeve from the fluid line can be advantageously prevented.

[0049] In a preferred embodiment, the coupling assembly of the present invention includes a retaining element and a compression element. According to the embodiment described above, the sleeve includes an end wall. The retaining element is configured to circumferentially surround the fluid line along a portion of its longitudinal axis, and the compression element is configured to compress the retaining element between the end wall of the sleeve and the compression element when the insert of the second component is arranged in an end position within the sleeve.

[0050] The retaining element can be constructed according to the embodiments described above. However, the retaining element can also include or consist of an elastic material, in particular an elastomer. Depending on the embodiment, the retaining element is configured to be reversibly or elastically deformed by the compression element. The shape of the retaining element can correspond to a torus, a tube, a hollow cylinder, or a hollow prism.

[0051] The retaining element may include a hole or perforation configured to accommodate a fluid line. For example, the fluid line may extend through the hole or perforation in the retaining element. Preferably, the compression element also includes a hole or perforation configured to accommodate the fluid line. According to an embodiment, the retaining element and the compression element are configured to align along the longitudinal axis of the fluid line or pipe. Preferably, the retaining element and the compression element are configured to allow the fluid line or pipe to extend through the hole in the retaining element and the compression element.

[0052] According to an embodiment, the retaining element and the compression element are arranged between the first component and the second component so that when the insert is arranged in the end position within the sleeve, the insert applies a force to the compression element (e.g., via at least one seal). The compression element can be configured to transmit the force applied via the insert to the retaining element. Preferably, the retaining element is arranged between the end wall of the sleeve and the compression element. Thus, the retaining element can be deformed between the compression element and the end wall when the insert is arranged in the end position within the sleeve. It is conceivable that the retaining element is configured to provide a force-locking mechanical connection to the fluid line when compressed by the compression element.

[0053] In another embodiment, the retaining element comprises or consists of a rigid material according to the embodiments described above. In this case, the retaining element can be permanently attached to the fluid line, for example, via welding or adhesive joints. It is conceivable that the compression element and the retaining element form a coherent structure. For example, the compression element and the retaining element can be mechanically connected or form a monolithic structure.

[0054] When providing a coupling assembly comprising a retaining element and a compression element, the sealing position of the insert (i.e., the end position of the insert within the sleeve) can advantageously be adapted to the engagement distance of the coupling mechanism. For example, the lengths of the threaded sections of the first and second components can advantageously be reduced depending on the axial dimensions of the compression element and the retaining element.

[0055] When providing a coupling assembly including a resilient retaining element and a compression element, a reversible mechanical connection can be provided between the fluid line and the coupling assembly. In particular, when the first component and the second component are connected via a coupling mechanism according to the embodiments described above, a reversible mechanical connection can be provided between the coupling assembly and the fluid line. Thus, the coupling assembly can be connected to the fluid line in a simple and time-saving manner.

[0056] According to an embodiment, the sections of the compression element comprise the shape of a cone, a frustoconical cone, a hemisphere, a cylinder or a prism.

[0057] For example, the sections of the compression element may include rounded and / or tapered shapes. The sections of the compression element including rounded and / or tapered shapes may be configured to receive forces applied via the insert. The insert may include sections shaped to complement the rounded and / or tapered sections of the compression element.

[0058] Preferably, the area of ​​the compression element comprising the rounded and / or tapered section exceeds the area of ​​the surface of the compression element transmitting the force to the retaining element. Thus, the force applied to the compression element can advantageously be used to increase the pressure on the retaining element.

[0059] Furthermore, the rounded and / or tapered shape of the compression element may advantageously provide for central alignment with a complementary shaped insert when the first and second components are placed together.

[0060] According to an embodiment of the coupling assembly of the invention, the compression element comprises a tapered section, and the insert comprises an aperture with an inner taper configured to receive the tapered section of the compression element.

[0061] The opening of the insert may be configured to accommodate the tapered section of the compression element. It is also conceivable that the inner taper of the opening of the insert is configured to mechanically engage with the tapered section of the compression element. Preferably, the opening and / or the section of the opening of the insert is shaped to complement the tapered section of the compression element.

[0062] According to the invention, at least one seal is configured to be arranged between the compression element and the insert such that a fluid tight connection is provided between the first component and the second component when the insert is arranged in an end position within the sleeve.

[0063] The at least one seal can be configured to be arranged between the tapered section of the compression element and the surface of the insert including the inner taper. In a preferred embodiment, the at least one seal is configured as an O-ring. The at least one seal can be accommodated in a dedicated groove arranged in the tapered section of the compression element and / or the surface of the insert including the inner taper. However, the at least one seal can also be configured as a washer or a conical seal.

[0064] In an assembled state of the coupling assembly, the insert can be arranged in an end position within the sleeve and apply a force to the at least one seal. The at least one seal can be configured to deform due to the force applied via the insert. In particular, the at least one seal can be configured to seal a passage or fluid path between the insert and the compression element, thereby providing a fluid-tight connection between the insert and the compression element.

[0065] The compression element may be arranged between the end wall of the sleeve and the insert of the first component.It is envisaged that the compression element is held in place by the end wall of the sleeve, a retaining element and / or a fluid line extending through a hole in the end wall of the sleeve.

[0066] According to an embodiment, the compression element comprises a body, in particular a conical body, comprising a hole or an inner opening. The hole or inner opening may extend through the body of the compression element in the axial direction of the compression element. Preferably, the hole or inner opening is configured to allow a fluid line to be routed through the body of the compression element.

[0067] The tapered shape of the compression element may advantageously facilitate insertion of the insert of the first component into the sleeve of the second component.

[0068] In an embodiment of the coupling assembly of the invention, the at least one exhaust opening is arranged in a lateral surface of the sleeve.It is also conceivable that the sleeve comprises an end wall and that the at least one exhaust opening is arranged in the end wall.

[0069] The vent openings arranged in the lateral surface of the sleeve can be blocked by the insert when the insert is arranged in its end position within the sleeve or when the insert is completely accommodated within the sleeve. In contrast, the vent openings arranged in the end wall of the sleeve can be unobstructed by the insert when the insert is arranged in its end position within the sleeve and can also be unobstructed by the retaining element and / or the compression element according to the embodiments described above. At least one vent opening can be arranged adjacent to or proximate to a hole in the end wall configured to accommodate a fluid line.

[0070] In a preferred embodiment, the coupling assembly includes a plurality of vent openings. The plurality of vent openings can be arranged in the end wall and / or lateral surface of the sleeve. In particular, the vent openings arranged in the end wall of the sleeve can be arranged around a hole in the end wall configured to accommodate a fluid line.

[0071] According to embodiments, the at least one vent opening or openings of the coupling assembly of the present invention are configured to mechanically engage a dedicated tool configured to tighten the mechanical connection between the first and second components of the coupling assembly. For example, the dedicated tool can be configured to engage the at least one vent opening or openings to rotate the second component relative to the first component or to clamp the first component to the second component.

[0072] The vent openings disposed within the lateral surface of the sleeve and / or within the end wall of the sleeve can advantageously engage with a specialized tool configured to secure the mechanical connection between the first and second components. Furthermore, when the first and second components are separated or moved apart, the vent openings disposed within the end wall of the sleeve can advantageously provide an unobstructed fluid path from the interior volume of the coupling assembly or the interior volume of a fluid line attached to the coupling assembly. This can advantageously facilitate decompression of the fluid within the coupling assembly when the coupling assembly is opened or disassembled.

[0073] When the vent opening is arranged in the lateral surface of the sleeve, when the first and second components are separated, decompression of the fluid within the coupling assembly can essentially begin as soon as the insert is unblocked or moves past the vent opening. Thus, the opening point or decompression point of the coupling assembly can advantageously be controlled via the position or arrangement of the at least one vent opening.

[0074] According to an embodiment of the coupling assembly according to the invention, the at least one vent opening is formed as a groove or a channel in the outer surface of the insert.

[0075] The at least one vent opening can be implemented as a groove or channel in an outer surface of the insert. The groove or channel can be formed in a lateral surface of the insert. Preferably, the groove or channel is oriented parallel to the longitudinal axis of the insert. The groove or channel can be formed so as to allow pressurized fluid to pass through the groove or channel between the insert and the sleeve when the first and second components, in particular the insert and the at least one seal and / or the compression element, are separated or moved apart.

[0076] According to an embodiment, the outer surface of the insert includes threads configured to engage with threads on the inner surface of the sleeve. A groove or channel may be formed within the section of the insert that includes the threads. In particular, the groove or channel may at least partially interrupt the threads on the insert. The groove or channel may be a recessed portion in the outer surface of the insert, particularly a lateral surface. Preferably, the groove or channel is arranged to avoid compromising the mechanical connection between the first and second components via the coupling mechanism.

[0077] When at least one vent opening formed as a groove or channel is provided in the outer surface of the insert, the pressurized fluid can be discharged in the axial direction away from the sleeve when the coupling assembly is opened or disassembled. As a result, the discharged fluid can be advantageously directed away from the hands of an operator opening or disassembling the coupling assembly.

[0078] Furthermore, when the at least one exhaust opening is arranged on the insert according to the embodiments described above, the size or the space requirement of the coupling assembly can be advantageously reduced.

[0079] In a preferred embodiment, the coupling assembly of the present invention includes a passageway configured to receive a vacuum insulated fluid line and to allow the vacuum insulated fluid line to extend through the coupling assembly along a longitudinal axis of the coupling assembly.

[0080] The passageway configured to receive the vacuum insulating fluid line can be formed by an internal opening in the sleeve and / or insert. It is also contemplated that the passageway is formed by a hole in a component of the coupling assembly configured to receive the vacuum insulating fluid line. For example, the passageway can be formed by holes in the end walls of the sleeve, the retaining element, and the compression element.

[0081] When providing a coupling assembly of the present invention that includes a passage configured to accommodate a vacuum-insulated fluid line, the coupling assembly can be advantageously used in cryogenic applications. Specifically, the coupling assembly of the present invention can insulate the fluid from the vacuum-insulated portion of the fluid line. Consequently, the material of the at least one seal can advantageously be independent of the temperature of the fluid in the fluid line. For example, the at least one seal can comprise an elastomer, such as rubber, while the fluid transported through the vacuum-insulated fluid line is at a cryogenic temperature or melting point of the elastomer. Consequently, the cost of the coupling assembly of the present invention can be advantageously reduced compared to conventional KF-type flanges or couplings using metal seals.

[0082] The insert of the present invention is configured for use in a coupling assembly according to the embodiments described above. In particular, the insert may form the second component of the coupling assembly according to the embodiments described above.

[0083] The insert of the present invention includes at least one venting opening formed as a groove or channel in an outer surface of the insert. The groove or channel may be formed in a lateral surface of the insert. In particular, according to the embodiments described above, the groove or channel may interrupt at least a portion of the threads provided on the outer surface of the insert.

[0084] However, the at least one vent opening may be arranged in any suitable manner to provide an unobstructed fluid path from the interior volume of the coupling assembly to the surrounding environment when the first and second components are moved apart but before the first and second components are fully separated from each other.

[0085] The insert may include an internal opening configured to accommodate a fluid line. For example, the internal opening may include a cylindrical or tubular shape. The internal opening may extend axially through the body of the insert. In particular, the internal opening may extend through the insert along a longitudinal axis, particularly an axis of rotational symmetry, of the insert. The internal opening may be configured to allow the fluid line to be routed through the body of the insert via the internal opening.

[0086] The insert may include a connection mechanism configured to mechanically connect the insert to a fluid line or fluid system. The insert may be attached to the fluid line via any suitable mechanical connection, such as a form-locking connection, a force-locking connection, and / or a material bond. For example, the connection mechanism may be configured to attach the insert to the fluid line via a clamping mechanism, a crimping mechanism, or a wedging mechanism. It is also contemplated that the insert may be glued to the fluid line via an adhesive or welded to the fluid line.

[0087] The insert of the invention has the advantages of the coupling assembly of the invention.

[0088] The sleeve of the present invention is configured for use in a coupling assembly according to the embodiments described above. In particular, the sleeve may form a first component of a coupling assembly according to the embodiments described above.

[0089] According to the invention, the sleeve comprises an opening configured to receive the insert and at least one exhaust opening arranged in a wall of the sleeve.The sleeve can be configured according to the embodiments described above.

[0090] The at least one exhaust opening may be arranged in an end wall of the sleeve and / or in a lateral surface of the sleeve.In a preferred embodiment, the sleeve comprises a plurality of exhaust openings arranged in the end wall and / or in a lateral surface of the sleeve.

[0091] The sleeve may include a hole or opening configured to accommodate a fluid line. The hole or opening may be arranged in an end wall of the sleeve and / or extend through the body of the sleeve along the longitudinal axis of the sleeve. In a preferred embodiment, the hole or opening is generally circular, and the geometric center of the hole or opening is arranged on an axis of the sleeve, in particular an axis of rotational symmetry. It is contemplated that at least a portion of the sleeve may comprise a hollow cylindrical member or hollow prism. The geometric center of the hole or opening in the end wall may be arranged on the longitudinal axis or the axis of rotational symmetry of the sleeve.

[0092] As described above, the sleeve may include a first axial end portion including an opening configured to accommodate the insert, and a second axial end portion including an end wall. The end wall may be in the form of a disk, an annulus, or a flat washer. The end wall may be mechanically connected to the sleeve, for example, via a weld or adhesive. However, the sleeve and end wall may also form a unitary structure.

[0093] The sleeve can be configured to accommodate a fluid line within its interior volume. In particular, a hole or aperture in the end wall of the sleeve can allow the fluid line to be inserted into a tubular cavity circumferentially surrounded by the sleeve wall along at least a portion of the sleeve's longitudinal axis. The sleeve and fluid line can be connected via the connection mechanism described above.

[0094] It is conceivable that, according to the embodiments described above, the sleeve is configured to be mechanically connected to the fluid line via at least one retaining element and a compression element. For example, according to the embodiments described above, the insert can compress the retaining element between the end wall and the compression element when the insert is arranged in the end position within the sleeve.

[0095] The sleeve, the at least one retaining element and the compression element may form separate components. However, since the at least one retaining element and the compression element are configured to attach the fluid line to the coupling assembly, the coupling assembly and / or the sleeve may be considered to include the at least one retaining element and the compression element.

[0096] According to an embodiment, the fluid line accommodated in the inner opening of the insert may correspond to a second fluid line. The fluid line accommodated in the tubular cavity of the sleeve may correspond to a first fluid line different from the second fluid line. The insert and the sleeve may comprise complementary parts of the coupling mechanism according to the embodiment described above. Preferably, the insert and the sleeve are configured to provide a fluid connection between the first fluid line and the second fluid line when connected via the coupling mechanism. In particular, the insert and the sleeve may form a coupling assembly of the present invention according to the embodiment described above. According to the embodiment described above, the coupling assembly may further comprise at least one retaining element and a compression element. Preferably, according to the embodiment described above, the sleeve and / or the insert comprise an exhaust opening.

[0097] The sleeve of the invention has the advantages of the coupling assembly of the invention according to the embodiments described above.

[0098] The fluid line connector of the present invention includes a coupling assembly of the present invention according to the embodiments described above. The first component of the coupling assembly is attached to a first fluid line, and the second component of the coupling assembly is attached to a second fluid line. The mechanical connection between the first fluid line and the first component, and between the second fluid line and the second component, can be constructed according to the embodiments described above.

[0099] In a preferred embodiment, the fluid line connection comprises at least one retaining element and a compression element according to the embodiments described above. At least the first component can be mechanically connected or fixed to the first fluid line via the at least one retaining element when the insert of the second component is completely accommodated in a predetermined position within the first component (for example, when the insert of the second component is arranged in an end position within the sleeve of the first component).

[0100] According to the present invention, the insert of the second component is arranged at an end position within the sleeve of the first component to provide a fluid line connection. For example, the insert can be completely housed within the sleeve. As described above, the first component can correspond to the sleeve, and the second component can correspond to the insert.

[0101] At least one seal is disposed between the first component and the second component to provide a fluid-tight connection between the first component and the second component. For example, when the insert contacts the at least one seal and applies a force to a surface of the at least one seal, the insert can be considered to be fully contained within the sleeve, thereby providing a fluid-tight seal between the insert and the at least one seal. In particular, when providing a fluid-tight connection between the first fluid line and the second fluid line via the coupling assembly, the insert can be considered to be fully contained within the sleeve.

[0102] When the insert is completely inserted into the sleeve via the coupling mechanism according to the above-described embodiment, the insert can also be considered to be completely accommodated in the sleeve. In particular, when the insert is arranged in an end position in the sleeve, the insert can be considered to be completely accommodated in the sleeve.

[0103] In one embodiment, the insert is considered fully contained within the sleeve when the insert contacts the at least one seal and applies a force to a surface of the at least one seal, thereby providing a fluid tight connection between the insert, the at least one seal, and the compression element.

[0104] The fluid tight connection can be configured to prevent fluid, in particular pressurized fluid, from leaking from the fluid line connector. For example, the fluid tight connection can be configured to prevent fluid from leaking from the first fluid line and / or the second fluid line connected via the coupling assembly.

[0105] The fluid line connection of the present invention may include a coupling assembly of the present invention that is mechanically connected to a first fluid line and a second fluid line such that a fluid connection, in particular a fluid tight connection, is provided between the first fluid line and the second fluid line.

[0106] The coupling assembly according to the present invention is configured to provide a fluid connection between two or more fluid lines or two or more fluid systems. It is also contemplated that the coupling assembly described herein is configured to provide a fluid connection between multiple fluid lines or multiple fluid systems. For example, according to the embodiments described herein, a first component of the coupling assembly can be attached to multiple first fluid lines, and a second component of the coupling assembly can be attached to multiple second fluid lines.

[0107] As used herein, fluid line can refer to a pipe, line, conduit or tube configured to transport pressurized fluid. However, fluid line can also refer to a pipe sleeve or connector connected to a fluid system including a pressurized fluid. For example, the first component and / or the second component can be mechanically connected to the connector. The first component and / or the second component can be connected to the connector via any conventional mechanism. For example, the first component and / or the second component can be glued or welded to the connector or fluid line. It is also conceivable that the first component and / or the second component are flanged, threaded or clamped to the connector or fluid line. For example, the first component and / or the second component as described above can include a flange configured to mechanically connect the first component and / or the second component to a flange on the fluid line or the connector. However, according to the embodiment described above, the first component and / or the second component can also be fixed to the connector or the fluid line via at least one retaining element.

[0108] According to an embodiment, the fluid line connection of the invention comprises a coupling assembly comprising a retaining element and a compression element according to the embodiments described above, wherein the retaining element is compressed between an end wall of the sleeve and the compression element, and wherein the first fluid line is mechanically attached to the first component via the retaining element.

[0109] The first component, the second component, the retaining element and the compression element may be configured according to the embodiments described above.

[0110] Preferably, the first component is mechanically connected or secured to the first fluid line via a retaining element. As described above, the retaining element can include an aperture configured to accommodate the first fluid line. In particular, the aperture in the retaining element can be configured to route the first fluid line through the body of the retaining element. The coupling assembly can be configured such that the compression element compresses the retaining element when the second element and the first element are mechanically connected via the coupling mechanism, particularly when the insert is fully accommodated and / or disposed within the sleeve in its end position.

[0111] According to an embodiment, the compressed retaining element may be configured to press against a surface of the first fluid line to secure the retaining element and the first component to the first fluid line.

[0112] The fluid line connection of the present invention has the advantages of the coupling assembly of the present invention according to the embodiments described above.

[0113] It should be understood that the gap between the complementary threads of the threaded connection of a conventional coupling is different from the exhaust opening according to the present invention. Threaded connections are generally not considered to be fluid-tight connections and can allow fluid to be slowly released from a pressurized fluid line. However, when opening a coupling assembly according to the present invention (incomplete separation of the first and second components), this slow release of fluid is different from the controlled decompression of the fluid line. When the insert is arranged in a position between the opening and the end position of the sleeve within the sleeve, the gap between the threaded sections of the conventional coupling is not considered to provide an unobstructed fluid path from the internal volume of the coupling assembly to the surrounding environment. In particular, the threaded connection in a conventional coupling still has the risk of being blown open when separated under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Other advantages and details of the present invention can be seen from the following description of the embodiments and the accompanying drawings. The accompanying drawings are shown as follows:

[0115] Figure 1 is a schematic diagram of an embodiment of a coupling assembly of the present invention including a sleeve of the present invention,

[0116] Figure 2 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0117] Figure 3 is a schematic diagram of an embodiment of an insert of the present invention,

[0118] Figure 4 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0119] Figure 5 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0120] Figure 6 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0121] Figure 7 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0122] Figure 8 is a schematic diagram of an embodiment of a coupling assembly of the present invention,

[0123] Figure 9 is a schematic diagram of an embodiment of a fluid line connector according to the present invention. DETAILED DESCRIPTION

[0124] Figure 1 An embodiment of a coupling assembly 50 of the present invention is shown, comprising a sleeve 33 , an insert 31 , retaining elements 38 ( 38 a and 38 b ), a compression element 39 , and a seal 37 .

[0125] The sleeve 33 may correspond to a nut, preferably a threaded nut. The cross-section of the sleeve 33 may include an oval, circular, or polygonal shape. In a preferred embodiment, the sleeve 33 includes a hexagonal cross-section configured to mechanically engage a standard spanner or wrench. However, the cross-section of the sleeve 33 may also include a different shape, such as a circular shape. In this case, a C-wrench may be used to tighten the mechanical connection between the first component 53 and the second component 54. For example, the C-wrench may be configured to mechanically engage one or more exhaust openings 40. The lateral walls of the sleeve 33 may allow linear movement of the insert 31 within the sleeve 33 via the coupling mechanism.

[0126] In the depicted embodiment, end wall 34 of sleeve 33 includes a hole or opening to accommodate fluid line 51. Fluid line 51 passes through the hole in end wall 34 along a longitudinal axis 52 of coupling assembly 50. In an embodiment, coupling assembly 50 is rotationally symmetric, and axis 52 corresponds to the axis of rotational symmetry of coupling assembly 50.

[0127] Preferably, the coupling mechanism that mechanically connects the insert 31 to the sleeve 33 comprises a threaded connection. For example, the inner surface of the sleeve 33 comprises female threads configured to mechanically engage with male threads provided on the outer surface of the insert 31. Figure 1 , the insert 31 moves relative to the sleeve 33 along the axis 52 when the insert 31 is screwed into the sleeve 33. The sleeve 33 can form a first component 53 of the coupling assembly 50, and the insert 31 can form a second component 54 of the coupling assembly 50. The coupling mechanism is configured to connect and / or disconnect the first component 53 and the second component 54 of the coupling assembly 50.

[0128] When the insert 31 is arranged in an end position within the sleeve 33, for example, when the tapered section 31 a of the insert 31 contacts or abuts the seal 37 and optionally contacts or abuts the tapered section 39 a of the compression element 39, a fluid-tight connection is provided. In the depicted example, the seal 37 is embodied as an O-ring that circumferentially surrounds at least a portion of the tapered section 39 a of the compression element 39. When the insert 31 is arranged in the end position or is completely accommodated within the sleeve 33, the insert 31 can exert a force on the seal 37 and optionally on the tapered section 39 a of the compression element 39. Thus, a fluid-tight connection is provided between the tapered section 31 a of the insert 31 and the seal 37.

[0129] Preferably, the retaining element 38 and the compression element 39 include a hole or opening for accommodating the fluid line 51. The hole or opening in the retaining element 38 and the compression element 39 may extend along the longitudinal axis 52 through the body of the retaining element 38 and the compression element 39.

[0130] According to an embodiment, the force applied to the compression element 39 via the insert 31 is transmitted to the retaining element 38b. The retaining element 38b may include an elastic material. The force transmitted to the retaining element 38b can cause the retaining element 38b to deform, so that a portion of the force applied via the insert 31 is transmitted to the outer peripheral surface or lateral surface of the fluid line 51. Thus, when the insert 31 is arranged in an end position within the sleeve 33 and applies a force to the seal 37 and, optionally, to the tapered section 39a of the compression element 39, the coupling assembly 50 can be reversibly fixed or attached to the fluid line 51. It is also conceivable that the outer diameter of the fluid line 51 exceeds the inner diameter of the hole extending through the elastic retaining element 38b. Therefore, the retaining element 38b can apply a force to the outer surface of the fluid line 51 and may need to be stretched when the retaining element 38b is installed on the fluid line 51.

[0131] In alternative embodiments, the retaining element 38b may comprise a rigid material, such as a rigid polymer, metal, or composite material. The retaining element 38b may be glued or welded to the fluid line 51 to prevent the sleeve 33 from moving along the axis of the fluid line 51.

[0132] exist Figure 1 In the embodiment depicted in FIG, coupling assembly 50 includes sleeve 33 of the present invention. Sleeve 34 includes an end wall 34 that includes a plurality of vent openings 40. Vent openings 40 are arranged adjacent to a hole in end wall 34 that accommodates fluid line 51. Vent openings 40 may correspond to holes, perforations, or slots in the material of end wall 34. Vent openings 40 allow fluid within coupling assembly 50 to decompress when insert 31 is separated from seal 37. In the depicted example, when tapered section 31a of insert 31 is separated from seal 37, a fluid path 70 is provided from interior volume 57 of coupling assembly 50 to ambient environment 90.

[0133] The coupling assembly 50 of the present invention can advantageously allow for decompression of fluid within the fluid line 51 without requiring complete separation of the insert 31 and the sleeve 33. In the depicted example, the fluid path 70 is provided while the insert 31 is still mechanically engaged with the sleeve 33 via the coupling mechanism. Because the vent opening 40 is provided in the end wall 34, the fluid can escape in the axial direction 52 away from the operator's hand that is in contact with the lateral surface of the sleeve 33 as the insert 31 is unscrewed from the sleeve 33.

[0134] exist Figure 1 、 Figure 2 and Figures 4 to 7In the embodiment depicted in FIG, end wall 34 of sleeve 33 is disposed between retaining elements 38a and 38b. In a preferred embodiment, retaining element 38a is implemented as a circlip or snap ring mechanically attached to the outer periphery of fluid line 51. However, retaining elements 38a and 38b may comprise bodies of any shape that can be reversibly or permanently attached to fluid line 51. Preferably, retaining elements 38a and 38b are configured to prevent sleeve 33 from moving along the axis of fluid line 51.

[0135] Retaining element 38b and compression element 39 can comprise different materials. In some embodiments, retaining element 38b and compression element 39 are separate components. In particular, retaining element 38b and compression element 39 can be separate or unattached from one another until coupling assembly 51 is assembled in the desired manner to form fluid line connection 80. In other embodiments, retaining element 38b and compression element 39 can form a coherent structure. For example, retaining element 38b and compression element 39 can be mechanically connected and / or form a unitary structure.

[0136] Figure 2 An embodiment of a coupling assembly 50 is shown wherein the at least one exhaust opening 40 is formed as one or more grooves or channels in the outer surface of the insert 31 (see FIG. Figure 3 ).

[0137] When the tapered section 31a of the insert 31 is Figure 2 The coupling mechanism depicted in FIG provides a fluid path 70 from the interior volume 57 of the coupling assembly 50 to the ambient environment 90 when the seal 37 is separated. Figure 1 and Figure 2 In the embodiment depicted, the fluid path 70 is closed when the insert 31 is arranged in an end position within the sleeve 33, for example when the insert 31 is fully accommodated within the sleeve 33 or when the tapered section 31a of the insert 31 abuts or presses against the seal 37 and optionally against the tapered section 39a of the compression element 39.

[0138] The coupling assembly 50 of the present invention may advantageously allow for decompression of fluid within the fluid line 51 without requiring complete separation of the insert 31 and sleeve 33 .

[0139] Figure 3 A detailed view of the insert 31 of the present invention is shown, which includes a plurality of vent openings 40 formed as grooves or channels in the outer surface of the insert 31. The insert 31 may include a threaded section 31d (e.g., a section of the second portion of the coupling mechanism) and one or more grooves or channels 40 that interrupt the threaded section 31d. The insert 31 includes an inner opening 31c that extends or connects to the fluid line 51 when the insert 31 is fully received within the sleeve 33. Figure 2 In the embodiment shown in FIG, the inner opening 31c of the insert 31 may include a tapered section 31a. The tapered section 31a may be configured to rest against the seal 37 and optionally against the tapered section 39a of the compression element 39 when the insert 31 is fully received within the sleeve 33.

[0140] Figure 4 Another embodiment of the coupling assembly 50 of the present invention is shown. In the depicted example, a plurality of vent openings 40 are arranged in the lateral surface of the sleeve 33. Thus, when the tapered section 31a of the insert 31 is separated from the seal 37, the pressurized fluid escapes in the radial direction of the coupling assembly 50. The retaining element 38 and the compression element 39 can be arranged according to Figure 1 and Figure 2 This is achieved by the implementation described in .

[0141] exist Figure 4 , the insert 31 is arranged in an end position within the sleeve 33, thereby preventing the pressurized fluid from escaping from the interior volume 57 of the coupling assembly 50 via the vent opening 40. When the insert 31 is arranged in the end position within the sleeve 33, the insert 31 or the second component can be considered to be completely contained within the sleeve 33 or the first component.

[0142] Preferably, coupling assembly 50 is configured to allow fluid line 51 to extend through coupling assembly 50 along axial direction 52. Thus, coupling assembly 50 can advantageously allow vacuum-insulated fluid line 51 to be connected to another fluid line or fluid system 56. The apertures in sleeve 33, retaining element 38, and compression element 39 are preferably configured to accommodate the outer diameter of vacuum-insulated fluid line 51. It is contemplated that the apertures in sleeve 33, retaining element 38, and compression element 39 form a passageway that allows vacuum-insulated fluid line 51 to extend through at least a portion of coupling assembly 50. For example, fluid line 51 or the vacuum-insulated fluid line can extend through compression element 39 or through opening 33a of sleeve 33.

[0143] Figure 5 Shown Figure 4 Implementation of the coupling assembly 50 depicted in FIG. Figure 4 In contrast, insert 31 is disposed within sleeve 33 between opening 33a and an end position of sleeve 33. Specifically, tapered section 31a of insert 31 is separated from seal 37 to provide a fluid path 70 from interior volume 57 of coupling assembly 50 to ambient environment 90.

[0144] The embodiments of the coupling assembly 50 described herein can allow pressurized fluid to escape from the interior volume of the fluid line 51 via the fluid path 70, and also from the interior volume of the insert 31 (as indicated by arrow 71). The insert 31 can be connected to another fluid line or a connector that connects the insert 31 to the fluid system 56 (see FIG. Figure 9 ).

[0145] exist Figure 5 In the embodiment depicted in FIG, coupling assembly 50 includes a passageway configured to accommodate a vacuum insulation fluid line 51. End wall 34, retaining element 38, and compression element 39 include apertures configured to accommodate vacuum insulation fluid line 51. The apertures in end wall 34, retaining element 38, and compression element 39 may form a passageway to accommodate vacuum insulation fluid line 51. The passageway may allow vacuum insulation fluid line 51 to extend through coupling assembly 50 along axis 52.

[0146] Figure 5 The coupling assembly 50 depicted in FIG can be used in conjunction with smaller vacuum insulated fluid lines, but also with high pressure fluid lines. In the illustrated embodiment, the end section of the fluid line 51 coincides with the end section of the compression element 39. However, depending on the application, the end section of the fluid line 51 can extend beyond the end section of the compression element 39 or beyond the opening 33a of the sleeve 33 (see, for example, FIG. Figure 4 ).

[0147] Figure 6 Another embodiment of a coupling assembly 50 of the present invention is shown. In the depicted example, the insert 31 includes a non-threaded section 61 disposed between a threaded section 62a and a threaded section 62b. Preferably, the outer diameters of the threaded sections 62a and 62b exceed the outer diameter of the non-threaded section 61. The inner diameter of the threaded section 63 disposed on the sleeve 33 exceeds the outer diameter of the non-threaded section 61. Furthermore, the axial length of the non-threaded section 61 exceeds the axial length of the threaded section 63 of the sleeve 33. Thus, once the second threaded section 62b has been unthreaded from the threaded section 63 or moved past the threaded section 63 away from the end wall 34, the insert 31 can be loosely attached to the sleeve 31. In this configuration, a fluid path 70 is provided through the gap between the non-threaded section 61 of the insert 31 and the threaded section 63 of the sleeve 33.

[0148] After the pressurized fluid has been released from the coupling assembly 50, the operator or technician can engage the sleeve 33 on the first thread 62a to completely separate the sleeve 33 from the insert 31. This provides an additional level of safety because a secondary operation is required to completely separate the first component 53 from the second component 54.

[0149] In the depicted embodiment, the sealing coupling assembly 50 may require that the threaded section 62b of the insert 31 be mechanically engaged with the threaded section 63 of the sleeve 33 and that the insert 31 be screwed into the sleeve 33 until the tapered section 31a of the insert 31 abuts or presses against the seal 37. Thus, the insert 31 is arranged in an end position within the sleeve 33, and the coupling assembly 50 is assembled and sealed.

[0150] Figure 7 Another embodiment of the coupling assembly 50 of the present invention is shown. In the depicted example, the coupling assembly 50 is fluid-tight when the insert 31 is arranged in the end position inside the sleeve 33, i.e., when the end section 31 b of the insert 31 presses the flat seal 37 or the gasket against the compression element 39. Preferably, the insert 31 and the sleeve 33 comprise complementary parts, in particular threaded connections, of the coupling mechanism configured to connect the insert 31 and the sleeve 33 according to the embodiment described above.

[0151] exist Figure 7 In the example shown in FIG, the compression element 39 is formed as a simple cylinder or block.

[0152] According to an embodiment, the retaining element 38b may comprise an elastomer. The compression element 39 may be configured to transmit a force applied via the insert 31 to the retaining element 38b. Thus, the retaining element 38b may deform and provide a force-locking mechanical connection to the shaft of the fluid line 51.

[0153] In an alternative embodiment, compression element 39 comprises a rigid material, such as metal, hard plastic, or a composite material, configured to substantially retain its shape when a force is applied via insert 31. In this case, retaining element 38b and / or compression element 39 are preferably attached to the shaft of fluid line 51 via a material bond.

[0154] In the depicted example, a fluid path 70 is provided when the flat seal 37 is separated from the end section 31b or the compression element 39 of the insert 31, while the insert 31 is still mechanically engaged with the sleeve 33 via the coupling mechanism. Since the vent opening 40 is provided in the end wall 34 of the sleeve 33, the pressurized fluid can be directed in the axial direction away from the operator's hand (not shown) in contact with the lateral surface of the sleeve 33 when the insert 31 is unscrewed from the sleeve 33 to escape from the coupling assembly 50. However, it is also conceivable that, according to the embodiment described above, at least one vent opening 40 is arranged in the lateral surface of the sleeve 33.

[0155] Figure 8Another embodiment of a coupling assembly 50 of the present invention is depicted. In the depicted example, a first component 53 of the coupling assembly 50, including a sleeve 33, and a second component 54 of the coupling assembly 50, including an insert 31, include complementary portions of a flange connection configured to mechanically connect the first component 53 to the second component 54. The coupling assembly 50 may include screws 41 configured to join the first and second components 53, 54 together and secure the flange connection. The seal 37 may be a flat seal or gasket configured to be compressed between the flange sections of the first and second components 53, 54 when the flange connection is secured via the screws 41.

[0156] Preferably, the coupling assembly 50 includes Figure 8 At least one of the two exemplary vent openings 40 illustrated in FIG. Vent opening 40 may represent a hole, particularly a bore, through the wall of second component 54 and / or insert 31. Vent opening 40 allows for decompression of fluid within coupling assembly 50 when insert 31 is disposed within sleeve 33 in a position between opening 33a and an end position of sleeve 33. In the depicted example, when the gap between the flange section of first component 53 and the flange section of second component 54 exceeds the thickness of seal 37, a fluid path 70 is provided from interior volume 57 of coupling assembly 50 to ambient environment 90.

[0157] In alternative embodiments, the coupling mechanism may comprise a clamping connection or a bayonet connection rather than a flange connection. The seal 37 may be as Figure 1 in the volume enclosed by the sleeve 33, or as depicted in Figure 8 The arrangement depicted in FIG is outside the sleeve 33 .

[0158] Figure 9 1 shows an embodiment of a fluid line connector 80 of the present invention. Preferably, the coupling assembly 50 of the present invention is configured to connect a fluid line 51 to a fluid system 56. The fluid system 56 may correspond to another fluid line. However, the fluid system 56 may also correspond to a pump, a compressor, or a fluid container. It is also conceivable that the fluid system 56 includes one or more components, such as a pump, a compressor, a fluid container, and / or another fluid line. The fluid system 56 may include an insert 31 configured for mechanical connection to the insert 31 of the present invention and / or the coupling assembly 50 according to the embodiments described above (see Figures 1 to 8 ) of the connector 55. The insert 31 can be connected to the connector 55 or the fluid system 56 via any suitable form lock, force lock and / or material connection. Depending on the embodiment, the insert 31 can be reversibly or permanently connected to the fluid system 56 and / or the connector 55.

[0159] like Figure 9As shown in FIG, the coupling assembly 50 is configured to provide a fluid connection between a fluid system 56 or a connector 55 and a fluid line 51. The coupling assembly 50 may correspond to the coupling assembly 50 according to the embodiment described above. Preferably, the fluid line 51 is as shown. Figure 4 . The vacuum insulated fluid line shown in . The vacuum insulated fluid line can be used to transport a cryogen or cryogenic fluid, such as helium, argon, neon, nitrogen, etc., at cryogenic temperatures (e.g., temperatures below 150K, below 100K, below 50K, or preferably below 10K). For example, the fluid line 51 can be configured to transport a cryogen for cryogenic applications, such as cooling or pre-cooling a superconducting magnet and / or filling a cryogen container of a magnetic resonance apparatus. The coupling assembly 50 of the present invention can advantageously be used at room temperature (and therefore allows the use of the rubber seal 37), while the fluid being transported is at cryogenic temperatures.

[0160] The sleeve 33 of the present invention may be constructed according to any of the sleeves 33 that include the exhaust openings 40 described above.

[0161] The embodiments described herein should be considered as examples. It should be understood that, if not otherwise stated, each embodiment can be expanded by features of other embodiments or combined with features of other embodiments.

Claims

1. A coupling assembly (50) for connecting a fluid pipeline (51), the coupling assembly (50) comprising a first component (53) having a sleeve (33), a second component (54) having an insert (31) and at least one seal (37), wherein: the sleeve (33) comprises an opening (33a) configured to receive the insert (31), the at least one seal (37) being arranged between the first component (53) and the second component (54) so ​​as to provide a fluid tight connection between the first component (53) and the second component (54) when the insert (31) is arranged in an end position within the sleeve (33), and The sleeve (33) and / or the insert (31) comprises at least one vent opening (40), the at least one vent opening (40) being configured to provide a fluid path (70) from the interior volume (57) of the coupling assembly (50) to the surrounding environment (90) when the insert (31) is arranged in the sleeve (33) in a position between the opening (33a) of the sleeve (33) and the end position.

2. The coupling assembly (50) according to claim 1, wherein: The first component (53) and the second component (54) include complementary portions of a coupling mechanism configured to mechanically connect the first component (53) to the second component (54).

3. The coupling assembly (50) according to claim 2, wherein: The coupling mechanism comprises a threaded connection, wherein the sleeve (33) comprises female threads and the insert (31) comprises male threads configured to mechanically engage the female threads of the sleeve (33).

4. The coupling assembly (50) according to claim 3, wherein: The insert (31) comprises a non-threaded section (61) arranged between a first threaded section (62a) and a second threaded section (62b), and wherein the outer diameters of the first threaded section (62a) and the second threaded section (62b) exceed the outer diameter of the non-threaded section (61).

5. The coupling assembly (50) according to the preceding claim, comprising a retaining element (38b) and a compression element (39), wherein: The sleeve (33) comprises an end wall (34), wherein the retaining element (38b) is configured to circumferentially surround the fluid line (51) along a portion of the longitudinal axis of the fluid line (51), and wherein the compression element (39) is configured to compress the retaining element (38b) between the end wall (34) and the compression element (39) when the insert (31) is arranged in the end position within the sleeve (33).

6. The coupling assembly (50) according to claim 5, wherein: The sections of the compression element (39) include the shape of a cone, a truncated cone, a hemisphere, a cylinder or a prism.

7. The coupling assembly (50) according to one of claims 5 or 6, wherein: The compression element (39) includes a tapered section, and wherein the insert (31) includes an opening with an inner taper configured to accommodate the tapered section (39a) of the compression element (39), wherein the at least one seal (37) is configured to be arranged between the compression element (39) and the insert (31) so as to provide a fluid tight connection between the first component (53) and the second component (54) when the insert (31) is arranged in the end position within the sleeve (33).

8. Coupling assembly (50) according to one of the preceding claims, wherein The at least one exhaust opening (40) is arranged in a lateral surface of the sleeve (33), and / or wherein the sleeve (33) comprises an end wall (34) and the at least one exhaust opening (40) is arranged in the end wall (34).

9. Coupling assembly (50) according to one of the preceding claims, wherein: The at least one exhaust opening (40) is formed as a groove or channel in the outer surface of the insert (31).

10. The coupling assembly (50) according to one of the preceding claims, comprising a passage configured to accommodate a vacuum insulating fluid line (51) and to allow the vacuum insulating fluid line (51) to extend through the coupling assembly (50) along a longitudinal axis (52) of the coupling assembly (50).

11. An insert (31) for use in a coupling assembly (50) according to one of the preceding claims, the insert (31) comprising at least one venting opening (40) formed as a groove or channel in an outer surface of the insert (31).

12. A sleeve (33) for use in a coupling assembly (50) according to one of claims 1 to 10, the sleeve (33) comprising an opening (33a) configured to accommodate an insert (31) and at least one exhaust opening (40) arranged in a wall of the sleeve (33).

13. A fluid line connection (80), comprising a coupling assembly (50) according to one of claims 1 to 10, wherein: The first component (53) is attached to a first fluid line and the second component is attached to a second fluid line, wherein the insert (31) of the second component (54) is arranged in the end position within the sleeve (33) of the first component (53), and wherein the at least one seal (37) is arranged between the first component (53) and the second component (54) so ​​as to provide a fluid-tight connection between the first component (53) and the second component (54).

14. The fluid line connection (80) according to claim 13, comprising a coupling assembly (50) according to one of claims 5 to 7, wherein: The retaining element (38b) is compressed between the end wall (34) of the sleeve (33) and the compression element (39), and wherein the first fluid line is mechanically attached to the first component (53) via the retaining element (38).

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