Cable connector

Abstract

A cable joint sealing member comprises: a sleeve (19) arranged to be slidably received in a channel (9) defined in a body (5) of the cable joint, the sleeve (19) being arranged to receive a curable sealing material for forming a seal against a cable passing through the sleeve, wherein the sleeve (19) is defined by an annular side wall extending along an axial length; wherein an outer surface (71) of the sleeve (19) comprises a tapered portion (95) such that an outer diameter of the sleeve (19) widens in the tapered portion (95); and wherein the outer surface (71) of the sleeve (19) is arranged to form a seal with the cable joint body (5). A cable joint using such a sealing member is also disclosed.

Description

Technical Field

[0001] The present invention relates to cable joints. The present invention also relates to cable joint anti-intrusion seals, cable joint sealing members, cable joint clamps and cable joint bodies. The present invention is particularly, but not exclusively, applicable to cable joints for sealing around electrical cables. However, the present invention also applies to cable joints for sealing around optical fiber cables, pipes and other conduits. Background Art

[0002] Cable joints are often used to seal around cables or conduits that pass through openings in walls or bulkheads. For example, cable joint assemblies can be used to seal around cables that enter an enclosure, such as a junction box containing electrical equipment, to prevent fluids from entering the enclosure or explosive forces from leaving the enclosure. In some cases, cable joints can be used in harsh environments, such as underwater, at high temperatures, or in harsh chemical environments.

[0003] Typically, a cable joint comprises a body through which the cable passes. The body is formed of several parts that are fixed together to assemble the joint. Each joint may provide a source of leakage. A clamp is provided in the body to clamp the cable and prevent it from being pulled out of the joint, as well as several seals.

[0004] In many examples, the clamp also acts as one of the seals, or the seal may require tightening of the clamp and / or part of the body. However, when the clamp fails or becomes loose, or the body is over-tightened or under-tightened, this means that the seal also fails or weakens. Furthermore, it is important that the clamp does not damage the cable. Also, under compression, the cable may experience cold flow, where the surface of the cable moves away from the compression element, further risking loss of clamping force or ingress protection.

[0005] Typically, one of the seals may be formed of a curable sealing material that is introduced into a sleeve (or barrel) through which the cable passes. The sleeve is then received in the body. During assembly, the curable material is allowed to set in the sleeve. The sleeve is then slid out of the body to inspect the seal formed around the cable and then slid back in before continuing assembly.

[0006] It is desirable to provide a cable connector that is easy to assemble and inspect and that prevents the cable from being pulled out without damaging the cable. Summary of the invention

[0007] According to a first aspect of the present invention, there is provided a cable joint sealing member, comprising: a sleeve arranged to be slidably received in a channel defined in a body of the cable joint, the sleeve arranged to receive a curable sealing material for forming a seal for a cable passing through the sleeve, wherein the sleeve is defined by an annular side wall extending along an axial length; wherein an outer surface of the sleeve comprises a tapered portion such that an outer diameter of the sleeve widens in the tapered portion; and wherein the outer surface of the sleeve is arranged to form a seal with the cable joint body.

[0008] The tapered sleeve ensures that during assembly of a cable joint including the sleeve, the sleeve is slid out of the body to check the seal between the curable sealing material. The tapered shape also helps to form a good seal between the sleeve and the body.

[0009] The outer surface may include a cylindrical portion adjacent to the tapered portion. The tapered portion may widen away from the cylindrical portion.

[0010] The sleeve may extend from a first end arranged to be received adjacent an end of the cable connector body to a second end opposite the first end, the first end arranged to be received within a channel of the cable connector.The tapered portion may widen towards the second end of the sleeve.

[0011] The inner surface of the sleeve may include a tapered portion that narrows in the same direction as the tapered portion of the outer surface. The tapered portion of the outer surface and the tapered portion of the inner surface may narrow at different angles and / or over different axial lengths.

[0012] The sleeve may be transparent. This allows easy inspection of the seal formed between the curable sealing material and the cable.

[0013] Typically, the sleeve will be formed from a polymeric material, typically a resilient material such as an elastomer.

[0014] However, in one embodiment, the sleeve may be formed of a metal material such as brass. In this case, the tapered portion of the outer surface may narrow towards the second end of the sleeve. Except for the tapered portion, the outer surface may be completely cylindrical.

[0015] According to a second aspect of the present invention, a cable joint is provided, comprising: a main body having walls defining a channel extending from a first end to a second end in an axial direction, the channel of the cable joint being arranged to receive a cable; and a cable joint sealing member according to the first aspect adjacent to the first end of the cable joint main body, which is received in the channel of the cable joint.

[0016] The tapered sleeve ensures that the sleeve can be slid out of the body during assembly of the cable joint to check the seal between the curable sealing material. The tapered shape also helps to form a good seal between the sleeve and the body.

[0017] The channel of the cable connector may include an inner surface. At least a portion of the inner surface may form a receiving portion arranged to receive the sealing member. The receiving portion may have a taper that matches the taper on the outer surface of the sleeve.

[0018] The cable joint sealing member may include a rim formed in the outer surface of the sleeve at the second end of the sleeve, and wherein the inner surface of the passage of the cable joint includes a platform arranged to engage the rim to prevent withdrawal of the can in the axial direction. A spacing may be formed between the rim and the platform to accommodate deformation or movement of the sleeve under compression.

[0019] The sealing member may extend from the second end of the channel, or may be flush with the second end. However, in an alternative embodiment, the sealing member may not extend to the second end, so that there is a gap between the sealing member and the second end of the channel. This can ensure that no sealing material is accidentally deposited on the outer part of the cable connector.

[0020] The cable connector may include a tightening device to apply compression between the first end of the cable connector body and the second end of the cable connector body. Applying compression between the first end and the second end of the cable connector body may compress the sealing member. The outer surface of the sealing member may form a seal with the cable connector body under compression.

[0021] The cable connector may include a socket received in a channel of the cable connector. The cable connector may also include means for securing the socket in the channel of the cable connector, such that the socket is arranged to locate the sleeve, and wherein the cable connector sealing member and the socket include corresponding hooking protrusions arranged to connect the sleeve to the socket. The socket may include a seal to prevent the curable sealing material from escaping from the sleeve.

[0022] Where the sleeve is formed of a metallic material, the socket may be provided with a seat for a tapered portion of the outer surface of the sleeve. In addition, a gap may be provided between the inner surface of the passage of the cable connector and the cylindrical outer surface of the sleeve; this may serve as a flame path. The passage of the cable connector may have a step of reduced diameter at a first end to accommodate the sleeve.

[0023] The cable joint may include: a cable passing through a cable joint body and a sealing member; and a curable sealing material received in the sleeve that forms a seal between the sleeve and the cable.

[0024] The cable connector may comprise a cable connector clamp received in the passage of the cable connector and arranged to clamp the cable passing through the passage of the cable connector to prevent axial movement of the cable.

[0025] The clamp may include an insulating sleeve arranged to receive and clamp the insulating outer sheath of the cable. The clamp may also include a clamping member arranged around the sleeve. The clamping member may include a body formed of an insulating material. The clamping member body may have: an inner surface, which defines a channel extending through the clamping member body in an axial direction from a first end to a second end, the clamping member channel being arranged to receive the cable and exert a clamping force on the insulating outer sheath of the cable through the insulating sleeve; and an outer surface, which is arranged to engage the cable joint body to prevent the clamp from moving from the cable joint body in an axial direction. The clamping member body may be formed by a plurality of longitudinal portions and a plurality of hinge portions, each longitudinal portion extending from a first end of the clamping member body to a second end of the clamping member body, and a plurality of hinge portions combining circumferentially adjacent longitudinal portions. The hinge portions may be arranged at alternating ends of the clamping member body around the circumference so that the longitudinal portions are combined at alternating ends of the clamping member body.

[0026] The clamp can be clamped onto the insulation covering of the cable passing through the cable joint and can provide uniform clamping force along the axial length of the clamp. The clamping force is sufficient to resist the cable being pulled out of the joint in the axial direction. The use of insulating material ensures that the cable is properly isolated electrically. In some cases, the sleeve can also be used to provide protection against compression intrusion.

[0027] Each of the longitudinal portions may include a clamping surface having a length extending from a first end of the clamping member body to a second end of the clamping member body and a width extending around a portion of a circumference of the clamping member body. The clamping surfaces of the longitudinal portions may engage an outer surface of the sleeve.

[0028] Adjacent longitudinal portions may be spaced apart from each other to form a gap extending from the first end of the clamping member body to the second end of the clamping member body and from the inner surface to the outer surface. The hinge portion may bridge the gap at the first end of the clamping member body or the second end of the clamping member body.

[0029] The cable joint may comprise an anti-intrusion seal arranged to seal between the cable joint body and the cable passing therethrough. The anti-intrusion seal may be separate from the clamp.

[0030] The anti-intrusion seal may include an annular retaining portion arranged to be sealingly fastened to the end of the wall of the cable joint body so that the seal fits to the outside of the cable joint body. The anti-intrusion seal may also include a sealing portion located within the annular retaining portion. The anti-intrusion seal may also include an orifice formed in the sealing portion, the orifice being defined by a mouth in the sealing portion, which is arranged to engage and clamp a cable passing through the orifice to form a seal.

[0031] The seal is able to prevent intrusion into the connector as the cable passes through the connector without the need to tighten the body of the cable connector or any other tightening mechanism. Therefore, the seal is considered to be non-compression type. In contrast, compression seals require tightening the connector 1 to compress the seal onto the cable to form a functional seal. The use of non-compression seals ensures that the cable connector containing the seal remains closed to prevent any intrusion from the outside environment even if the body is overtightened or loosened or the cable moves relative to the seal. The seal can also work independently of any clamp that clamps the cable, so if the clamp loosens or fails, the seal will still remain. In addition, because the seal is arranged to be assembled at the end of the cable connector, the seal can be visually inspected.

[0032] The anti-intrusion seal may include a gap or open space in the radial space between the mouth and the retaining portion.

[0033] The sealing portion formed by the anti-intrusion seal may be formed without compression of the sealing portion in the axial direction of the cable passing through the seal.

[0034] The cable connector may include an explosion proof seal received within the cable connector body.

[0035] The cable joint body may include: a first body portion, which includes a first end of the cable joint body; and a second body portion, which is fastened to the first body portion and includes a second end of the cable joint body. The clamp and the explosion-proof seal may be received in the channel of the cable joint. The cable joint may also include: an armor clamp located in the channel of the cable joint, which is arranged to clamp the grounding sheath of the cable passing through the cable joint.

[0036] The cable joint has a single external joint point and thus reduces the number of possible leak points, thereby reducing the number of seals required. In addition, the available surface area of ​​the joint surface is increased, providing more area for surface marking and improving aesthetics.

[0037] According to a third aspect of the present invention, a cable joint clamp is provided, which includes an insulating sleeve arranged to receive and clamp the insulating outer sheath of a cable and a clamping member arranged around the sleeve, the clamping member including a main body formed of an insulating material, the main body having: an inner surface, which defines a channel extending through the main body in an axial direction from a first end to a second end, the channel being arranged to receive the cable and apply a clamping force on the insulating outer sheath of the cable through the insulating sleeve; and an outer surface, which is arranged to engage the cable joint body to prevent the clamp from moving from the main body in an axial direction, wherein the main body is formed by a plurality of longitudinal portions and a plurality of hinge portions, each longitudinal portion extending from a first end to the second end, and a plurality of hinge portions connecting circumferentially adjacent longitudinal portions; and wherein the hinge portions are arranged around the circumference at alternating ends of the main body so that the longitudinal portions are connected at alternating ends of the main body.

[0038] The clamp can be clamped onto the insulation covering of a cable passing through a cable joint and can provide uniform clamping force along the axial length of the clamp to prevent damage to the cable. The clamping force is sufficient to resist pulling out of the cable in the axial direction. The use of insulating material ensures that the cable is electrically properly isolated.

[0039] Each of the longitudinal portions may include a gripping surface having a length extending from the first end to the second end of the body and a width extending around a portion of the circumference of the body.The gripping surfaces of the longitudinal portions may engage an outer surface of the sleeve.

[0040] Adjacent longitudinal portions may be spaced apart from each other to form a gap extending from the first end to the second end and from the inner surface to the outer surface.The hinge portion may bridge the gap at the first end or the second end.

[0041] The longitudinal portions may be arranged such that the width of each gap around the circumference of the body widens away from a respective hinge portion bridging the gap at the first end or the second end.

[0042] Each clamping surface may include a pair of parallel spaced apart edges extending from the first end to the second end.Each edge may extend around a portion of the circumference of the channel.

[0043] The hinge portion may be formed by a living hinge.

[0044] The body may be formed from a single unitary piece.

[0045] The outer surface may include a tapered portion at the first end and / or the second end.The tapered portion may extend around the circumference of the body and may narrow radially inwardly towards the respective end.

[0046] The clamp may be formed from thermoplastic or silicone rubber.

[0047] According to a fourth aspect, a cable joint is provided, comprising: a main body defining a channel extending in an axial direction, the channel being arranged to receive a cable; a first protrusion extending radially into the channel; a second protrusion extending radially into the channel and being axially spaced apart from the first extension; and a cable joint clamp according to the first aspect located between the first protrusion and the second protrusion.

[0048] The clamp can be clamped onto the insulation covering of the cable passing through the cable joint and can provide uniform clamping force along the axial length of the clamp. The clamping force is sufficient to resist the cable being pulled out of the joint in the axial direction. The use of insulating material ensures that the cable is properly isolated electrically. In some cases, the sleeve can also be used to provide protection against compression intrusion.

[0049] The cable joint may further comprise an anti-intrusion seal arranged to seal between the body and a cable passing therethrough at the opening of the passage.

[0050] The use of separate seals and clamps ensures that the seal functions independently of the clamps. Thus, if the clamps become loose, at least some level of sealing remains intact and the effects of cold flow are reduced or eliminated.

[0051] The cable joint may also include a sealing member arranged to seal between the body and the cable passing through the sealing member. The sealing member may include a bracket slidably received in the passage. The bracket may be arranged to receive a curable sealing material. In use, the cable may pass through the bracket so that the curable sealing material forms a seal between the bracket and the cable, and the bracket forms a seal to the body.

[0052] According to a fifth aspect of the present invention, a cable joint anti-intrusion seal is provided, which comprises: an annular retaining portion, which is arranged to be sealingly fastened to the end of the wall of the cable joint body so that the seal is assembled to the outside of the cable joint body; a sealing portion, which is located in the annular retaining portion; and an orifice formed in the sealing portion, the orifice being defined by a mouth in the sealing portion, and which is arranged to engage and clamp the cable passing through the orifice to form a seal.

[0053] The seal is able to prevent intrusion into the joint as the cable passes through the joint without the need to tighten the body of the cable joint or any other tightening mechanism. Therefore, the seal is considered to be non-compression type. In contrast, compression seals require tightening the joint 1 to compress the seal onto the cable to form a functional seal. This ensures that the cable joint containing the seal remains closed to prevent any intrusion from the outside environment even if the body is overtightened or loosened or the cable moves relative to the seal. The seal also works independently of the clamp, so if the clamp is loose or fails, the seal will still remain. In addition, since the seal is arranged to be assembled at the end of the cable joint, the seal can be visually inspected.

[0054] The seal may be formed from a single integral component.

[0055] The seal may be formed from silicone rubber or any other rubberized material, such as thermoplastic elastomer (TPE), neoprene, ethylene propylene diene monomer (EPDM), and the like.

[0056] The retaining portion may comprise one or more projections arranged to engage corresponding projections in the body of the cable fitting.

[0057] The mouth may include a void or open space in the radial space between the mouth and the retaining portion. The void may accommodate any compression of the seal without transferring the compression to the cable.

[0058] The mouth may be axially spaced from the retaining portion such that the sealing portion forms a truncated cone. The cable joint anti-intrusion seal may include a lip formed at the mouth. The cable joint may be deformable such that the opening may be axially movable relative to the retaining portion. In a first configuration, the mouth may be arranged on a first axial side of the retaining portion, and in a second configuration, the mouth may be arranged on a second axial side of the retaining portion opposite the first axial side.

[0059] The opening may be formed by an annular wall having a length extending along the axis.The retaining portion may extend axially, and the mouth and retaining portion may be at least partially coaxial.

[0060] The cable splice anti-intrusion seal may include one or more ribs extending from the retaining portion to the mouth in an arcuate form. Alternatively, the sealing portion may include a pair of annular, axially spaced side walls extending from the retaining portion to the mouth, the side walls, the retaining portion and the mouth enclosing an annular gap. The enclosed gap or space between the ribs provides an example of a way to accommodate compression.

[0061] The seal may be formed without compression of the anti-intrusion seal in the axial direction of the cable passing through the seal.

[0062] According to a sixth aspect of the present invention, there is provided a cable joint comprising: a body having a wall defining an axially extending channel arranged to receive a cable; and a cable joint anti-intrusion seal according to the third aspect at a first end of the wall.

[0063] The seal is able to prevent intrusion into the connector as the cable passes through the connector without the need to tighten the body of the cable connector or any other tightening mechanism. Therefore, the seal is considered to be non-compression type. In contrast, compression seals require tightening the connector 1 to compress the seal onto the cable to form a functional seal. The use of non-compression seals ensures that the cable connector containing the seal remains closed to prevent any intrusion from the outside environment even if the body is overtightened or loosened or the cable moves relative to the seal. The seal can also work independently of any clamp that clamps the cable, so if the clamp loosens or fails, the seal will still remain. In addition, because the seal is arranged to be assembled at the end of the cable connector, the seal can be visually inspected.

[0064] The cable joint may further comprise: a cable joint clamp received in the channel and arranged to clamp the cable passing through the channel to prevent axial movement of the cable. The clamp may comprise a clamp according to the first aspect. The use of separate clamps and seals ensures that the functions of the clamps and seals are separated. Thus, for example, if the clamp fails or becomes loose, the seal is still maintained to prevent intrusion into the joint. As described above, the clamp may or may not provide further protection against intrusion.

[0065] The cable joint may also include a sealing member arranged to seal between the body and the cable passing through the sealing member. The sealing member may include a bracket slidably received in the passage. The bracket may be arranged to receive a curable sealing material. In use, the cable may pass through the bracket so that the curable sealing material forms a seal between the bracket and the cable, and the bracket forms a seal to the body.

[0066] The cable connector may include an explosion proof seal received within a body of the cable connector.

[0067] According to a seventh aspect of the present invention, there is provided a cable joint, comprising: a main body defining a channel extending in an axial direction from a first end to a second end, the main body comprising: a first main body portion including a first end; and a second main body portion fastened to the first main body portion and including a second end; a clamping member located in the channel, arranged to clamp a cable passing through the channel to prevent axial movement of the cable during use; a bracket located in the channel, arranged to receive a curable sealing material to form a sealing member around the cable passing through the channel; an armor clamp located in the channel, arranged to clamp a grounding sheath of a cable passing through the joint; and an explosion-proof seal located in the channel.

[0068] The cable joint has a single external joint point and thus reduces the number of possible leak points, thereby reducing the number of seals required. In addition, the available surface area of ​​the joint surface is increased, providing more area for surface marking and improving aesthetics.

[0069] The first and second body parts can be fastened together by a first set of mutually engaging threads. Tightening the threads can apply compression between the first end and the second end. The cable joint can include a retaining nut arranged to hold the bracket in an axial position, the retaining nut being received in a channel formed by the first and second body parts. The retaining nut can be fastened to the body by a second set of mutually engaging threads. An inner portion of one of the first body part or the second body part can be received in the other of the first or second body parts. The inner portion can have: a first region and a second region. The first region can have a first outer diameter corresponding to the inner diameter of the other of the first or second body parts. The first region can include threads on an outer surface, the threads being arranged to engage with corresponding threads formed on the inner surface of the other of the first or second body parts. The second region can have a second diameter smaller than the first region. The first region can be located axially between the first end and the second region. The second region can include threads on an outer surface, the threads being arranged to engage with corresponding threads formed on the inner surface of the retaining nut.

[0070] The cable connector may comprise an annular retaining member arranged to engage the socket.The retaining nut may be arranged to retain the annular retaining member within the through passage.

[0071] The retaining nut may comprise a first axial surface arranged to retain the socket and a second axial surface opposite the first axial surface arranged to engage the clamping member.

[0072] The clamping member may comprise a cable splice clamp according to the first aspect.

[0073] The cable splice may comprise an anti-intrusion seal separate from the clamping member.The anti-intrusion seal may comprise a cable splice anti-intrusion seal according to the third aspect.

[0074] The sealing member may include the cable splice sealing member according to the fifth aspect.

[0075] According to an eighth aspect of the present invention, there is provided a cable joint comprising: a metal body having walls defining a channel, the channel having an inner wall, the channel being arranged to receive a cable; and a grounding clamp formed by a wire in the channel, the grounding clamp engaging the inner wall and extending inwardly.

[0076] This therefore provides a simple and convenient grounding clamp.Typically, the grounding clamp will be positioned to contact the grounding sheath of a cable in the channel when in use.

[0077] Typically, the grounding clip can be received in a recess in the inner wall. This helps to position the grounding clip.

[0078] The ground clip may include a base ring defining a planar arc and at least one prong formed by a portion of the wire that bends away from the base ring to extend inwardly into the channel. There may be at least two or three prongs.

[0079] The grounding clip is formed from a single wire segment having two ends. The wire segment may be provided with a return elbow adjacent each end, the return elbow being arranged so that in use, the return elbow, rather than the end, contacts the grounding sheath.

[0080] The cable connector may be according to the second, fourth, sixth or seventh aspect of the invention.

[0081] According to the ninth aspect of the present invention, we provide a cable joint comprising: a main body having walls defining a channel, the channel having an inner wall, the channel being arranged to receive a cable; a clamp arranged to clamp the cable circumferentially and a clamp drive nut arranged to drive the clamp to engage with the clamp, wherein the clamp drive nut is threadedly mounted on the main body so that rotation of the clamp drive nut changes the inner diameter of the clamp, wherein the main body has formed thereon a scale showing the linear displacement of the clamp drive nut relative to the main body so as to give an indication of the inner diameter of the clamp.

[0082] Thus, the linear travel of the clamp drive nut can be used to indicate the inner diameter of the clamp. Thus, the user can determine whether the clamp drive nut is properly tightened by observing the position of the clamp drive nut relative to the scale.

[0083] Typically, the clamp drive nut may comprise a support nut of a cable fitting and may form the second body portion of any of the second, fourth, sixth or seventh aspects of the present invention.

[0084] It will be appreciated that optional features discussed in relation to a particular aspect or embodiment may also be applied to any other aspect or embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0086] Figure 1A is a schematic cross-sectional view of a cable connector according to an embodiment of the present invention;

[0087] Figure 1B yes Figure 1A Exploded perspective view of the cable connector;

[0088] Figure 1C Assembled with cables Figure 1A A stereogram of a cable connector;

[0089] Figure 2 The cross-sectional view shows Figure 1A a cable connector in an area where the first and second body portions join;

[0090] Figure 3A The cross-sectional view shows Figure 1A The area of ​​the composite tank of the cable joint;

[0091] Figure 3B Show Figure 1A Alternative arrangements of composite tanks for cable connections;

[0092] Figure 4A Show Figure 1A A side view of a clamp for a cable connector;

[0093] Figure 4B Show Figure 1A An end view of a clamp for a cable connector;

[0094] Figure 4C Show Figure 1A A three-dimensional diagram of a clamp for a cable connector;

[0095] Figure 5 Show Figure 1AA side cross-sectional view of an anti-intrusion seal of a cable connector;

[0096] Fig. 6A showing a cross-sectional view of a first alternative anti-intrusion seal;

[0097] Figure 6B showing a perspective view of a second alternative anti-intrusion seal;

[0098] Figure 6C a side cross-sectional view showing a third alternative anti-intrusion seal;

[0099] Figure 7 shows a cross section through a cable joint of an alternative embodiment of the present invention;

[0100] Figure 8 Shown through Figure 7 A cross-section of a cable connector in which a cable is installed;

[0101] Fig. 9 shows a cross section through a cable connector of another embodiment of the present invention;

[0102] Figures 10 to 13 Show Fig. 9 Cross-sectional views of a cable connector in sequential assembly stages;

[0103] Fig.14 shows a cross section through a cable connector of another embodiment of the present invention;

[0104] Fig.15 Show Fig.14 an enlarged cross-sectional view of a portion of a cable connector;

[0105] Fig.16 and Fig.17 is Fig.14 A perspective view of an alternative form of wire clamp used in a cable connector;

[0106] Fig.18 A top view showing a cable connector according to another embodiment of the present invention; and

[0107] Fig.19 and Fig. 20 It passes through Fig.18 Cross-section of a cable gland with the rear nut in different positions. DETAILED DESCRIPTION

[0108] In the following description of the embodiments, the configuration and / or arrangement and / or function and / or operation are described only to the extent necessary for understanding each embodiment, and therefore the description of the same or similar features in different embodiments may not be repeated, as they will be understood from their description in other embodiments. Therefore, the embodiments should not be read and interpreted in isolation, and it will be understood that any feature described in a specific embodiment has applicability to other embodiments unless explicitly excluded by the specification.

[0109] Figures 1A to 1C An example of a cable joint 1 according to an embodiment of the invention is shown. Figure 1A The cable connector 1 is shown in a side cross-sectional view in assembled form, and Figure 1B The cable connector 1 is shown in an exploded view. Figure 1C A cable joint 1 is shown in assembled form, with a cable 3 passing through the cable joint 1. The cable 3 typically comprises a plurality of conductive cores (not shown), each having its own insulating jacket (not shown). The cores are surrounded by an inner jacket (not shown). This in turn is surrounded by an insulating outer jacket (not shown). Between the inner and outer jackets a grounding jacket, such as a braid or armour, is provided.

[0110] The cable connector 1 comprises a body 5 formed by an annular wall 7. The wall 7 defines a passage 9 extending through the body 5 in an axial direction A. The passage 9 extends from a first end 11 to a second end 13 of the body 5. An external flange 15 is formed on the body adjacent to the first end 11 for mounting the cable connector 1 to a wall, bulkhead or housing (not shown) through which the cable 3 passes. In use, the first end 11 of the cable connector 1 is arranged to pass through an opening in the bulkhead, while the second end 13 is in the external environment.

[0111] In the channel 9, near the first end 11, a sleeve-like sealing member 17 is formed in the composite pot 19. In the channel 9 there is also a clamp 21 for clamping on the outer insulating cover of the cable 3. The clamp 21 is arranged between the composite pot 19 and the second end 13. At the second end 13, an anti-intrusion seal 23 is arranged above the opening of the channel 9. In addition, an explosion-proof seal (not shown) can also be received in the channel 9, and an external rubber seal is arranged on the outside of the body 5. The composite pot 19, the clamp 21 and the anti-intrusion seal 23 will be discussed in further detail below.

[0112] The body 5 is formed of a first portion 25 and a second portion 27. Each portion 25, 27 forms an axial portion of the body 5 such that each portion 25, 27 extends around the circumference of the passage 9 and along a portion of the length.

[0113] The first body part 25, also referred to as the inlet, comprises the first end 11 and the external flange 15, and receives the composite tank 19. Between the first end 11 and the external flange 15, the first body part 25 comprises a cylindrical portion 29. This may include threads or the like 31 for receiving a nut to secure the fitting to the bulkhead through which the cables pass.

[0114] The first body portion 25 tapers outwardly away from the first end 11 after the flange 15. A further cylindrical section 33 is arranged opposite the first end 11 of the body 5. In the assembled joint 1, the further cylindrical section 33 is received within the second body portion 27. Figure 2 The area where the first body portion 25 extends into the second body portion 27 is shown.

[0115] A first region 35 of the other cylindrical section 33 adjacent the taper includes first threads 37. The width of the first region 35 is such that the first threads 37 engage corresponding threads 41 on the inner surface 39 of the second portion 27 to join the body portions 25, 27 together. Tightening the threads applies pressure between the first end 11 and the second end 13.

[0116] The second region 43 of the other cylindrical section 33 has a narrower diameter than the first region 35 at the end of the first body portion 25 opposite to the first end 11. The second region 43 includes an external thread 45 to fasten a spigot retaining nut 47 to the end of the first body portion 25. The spigot retaining nut 47 extends axially to continue the second region 43 of the other cylindrical section 33.

[0117] A radially extending platform 51 is formed on a first axial face 49 of the spigot retaining nut 47, where the spigot retaining nut 47 engages the first body portion 25, extending into the passage 9. The platform 51 forms a seat for an armor clip 53 arranged to clamp the grounding sheath of the cable and electrically couple the grounding sheath to the body 5 of the connector 1.

[0118] A socket (or annular retaining member) 55 is located between a platform 57 formed in the inner surface 59 of the first body portion 25 and the end of the anti-armor clip 53. The socket 55 includes a groove 61 formed on a tapered surface extending inside the armor clip 53 and an annular rim 63 that engages the platform 57 in the first body portion 25 and extends radially inward to form a seat for the composite tank 19. The socket 55 is held in place by the platform 57 on the one hand and the armor clip 53 and retaining nut 47 on the other hand.

[0119] The second axial face 65 of the socket retaining nut 47 forms a seat for the clamp 21, which will be discussed in more detail below. The cable 3 passes through the socket retaining nut 47, the armor clip 53 and the socket 55. The grounding sheath (not shown) is clamped by the armor clip cooperating with the groove 61 on the surface of the socket 55.

[0120] The second body portion 27 forms a support nut for the cable connector 1. The clamp 21 is received within a portion of the passage 9 formed by the support nut 27. The second body portion 27 includes an annular platform 67 extending across the second end 13. An annular ring 69 is disposed within the passage 9, rests on the platform 67, and provides a second seat for the clamp 21, such that the clamp 21 is received between the ring 69 and the socket retaining nut 47.

[0121] Figure 3A An area of ​​the composite tank 19 is shown in more detail.

[0122] The composite tank 19 is formed by a transparent polymeric cylindrical wall 79 extending from a first end 87 to a second end 89. The first end 87 of the wall 79 is received at the first end of the joint 11 and the second end 89 of the wall is located within the passage 9.

[0123] The wall 79 has an outer surface 71 that engages the inner surface 59 of the first body portion 25 and an inner surface 75 that forms a through passage 77 through which the cable 3 extends in the assembled connector 1 .

[0124] The outer surface 71 includes a platform 81 formed in the rim 83 at the second end 89, which engages with a step 85 formed in the inner surface 75 of the first body member 25 to retain the can 19 pulled out in the direction toward the first end 11. A space is formed between the platform 81 and the step 85 in the axial direction A and optionally also in the radial direction. The outer surface 71 narrows inwardly from the rim 83 to the first end 87 to form a tapered area 95. The inner surface 75 of the first body portion 25 includes a matching tapered portion 97.

[0125] The inner surface 75 of the cylindrical wall 79 includes a cylindrical portion 91 adjacent the first end 87 and a tapered portion 93 that narrows inwardly from the second end 89 to the cylindrical portion 91 .

[0126] In use, the can 19 is disposed in the first body portion 25 and the cable is passed through the component parts of the joint 1 without screwing the body portions 25, 27 together. A curable sealing material (not shown) is injected into the can 19 and allowed to set to form a plug (not shown). The can 19 and the first body portion 25 are then slid apart (the can 19 is moved towards the second body portion 27, and / or the first body portion 25 is moved away from the second body portion 27) to allow a visual inspection to ensure that no voids have formed in the can 19 and that the can is therefore properly filled and the plug is properly formed around the cable 5. The can 19 is then slid back into the first body portion 25.

[0127] When the first body portion 25 and the second body portion 27 are screwed together, the can 19 and the plug are compressed. Even under compression, the land 81 in the composite can 19 is spaced from the step 85 in the inner surface 75 of the first body member 25 to ensure that the tapered areas 95, 97 engage, rather than the land 81 and the step 85. Thus, a seal is formed between the can 19 and the inner surface 59 of the first body member 25 along the length of the tapered areas 95, 97. In this way, the can 19 and the plug are used to seal the member 17.

[0128] Figure 3B An alternative arrangement for the second end 89 of the composite tank 19 is shown, which may be used in place of Figure 3A The arrangement shown in . Figure 3B The composite tank 19 shown in FIG. 1 is the same as the composite tank discussed above, unless expressly stated otherwise.

[0129] exist Figure 3B In the example shown, an annular hooking protrusion 167 is formed in the inner surface 169 of the rim 83. The hooking protrusion 167 is formed at the second end 89 of the composite tank 19, and the inner surface of the rim 83 narrows into the channel from the hooking protrusion 167. A corresponding hooking protrusion 171 is formed in the socket 55 so that the socket 55 can be clipped to the composite tank to further position the socket 55 when in use.

[0130] In this example, the sleeve socket retaining nut 47 may optionally be omitted. In this case, the armor clip 53 is secured between the socket 55 and a platform 173 formed in the inner surface of the second body portion 27. However, in other examples, the socket retaining nut may be retained.

[0131] In addition, Figure 3B In the example shown, the socket 55 includes a curable composite seal 175 disposed within the socket 55. In use, the curable composite seal 175 forms a seal for cables passing through the socket 55 and prevents the curable sealing material from escaping outside the tank 19 when poured.

[0132] The curable composite seal 175 is formed of a softer, less rigid material than the can 19. When formed into a plug, the plug provides a high quality seal for general use. However, the softer curable composite seal 175 ensures that an adequate seal is formed during the introduction of the curable sealing material.

[0133] The curable composite seal 175 is disposed away from the end of the socket 55 so that the curable seal material partially extends into the socket 55 and forms an interface with the material of the socket 55. Thus, once the plug is formed, the pressure applied to the plug, which can urge the composite can 19 away from the taper, is applied directly to the socket 55, thereby holding the composite can 19 in place.

[0134] It should be understood that the seal 175 and / or the interengaging hook portions 167, 171 may be applied to Figure 3A The composite tank 19 shown. In the case of the hooking parts 167, 171, the socket retaining nut 47 can be optionally omitted.

[0135] In the attached figure Figure 7 and Figure 8 Another embodiment of the cable connector according to the present invention is shown in FIG. Figure 3B The corresponding features are connected by Figures 1A to 1C The embodiments are described with reference numerals increased by 200 correspondingly.

[0136] Figure 7 The cable connector 201 is shown in a cross-sectional view in assembled form without a cable. Figure 8 A cable joint 201 is shown in assembled form, with a cable 203 passing through the cable joint 201. The cable 203 typically comprises a plurality of conductive cores 300, each having its own insulating jacket (not shown). The cores 300 are surrounded by an inner jacket 301. This in turn is surrounded by an insulating outer jacket 302. A grounding jacket, such as a braid or armor, is provided between the inner and outer jackets. Figure 8 A curable sealing material 303 is shown for sealing the individual cores therein.

[0137] The cable connector 201 includes a body 205 formed by an annular wall 207. The wall 207 defines a passage 209 extending through the body 205 in an axial direction. The passage 209 extends from a first end 211 of the body 205 to a second end 213. An external flange 215 is formed on the body adjacent to the first end 211 for mounting the cable connector 201 to a wall, bulkhead or housing (not shown) through which the cable 203 passes. In use, the first end 211 of the cable connector 201 is disposed through an opening in the bulkhead, while the second end 213 is in the external environment.

[0138] In the channel 209, close to the first end 11, a sleeve-like sealing member is formed as a compound pot 219. In the channel 209 there is also a clamp 221 for clamping on the outer insulating cover 302 of the cable 203. The clamp 221 is arranged between the compound pot 219 and the second end 213.

[0139] The body 205 is formed of a first portion 225 and a second portion 227. Each portion 225, 227 forms an axial portion of the body 205 such that each portion 225, 227 extends around the circumference of the passage 209 and along a portion of the length.

[0140] The first body portion 225, also referred to as the inlet, includes the first end 211 and the outer flange 215, and receives the composite tank 219. Between the first end 211 and the outer flange 215, the first body portion 225 includes a cylindrical portion 229. This may include threads for receiving a nut or the like to secure the fitting to the bulkhead through which the cable passes.

[0141] Figure 8 2 shows a curable sealing material 303 used to seal each core 300 within the cable 203 as in the previous embodiments. FIG. 3A to FIG. 3B Compared to the embodiment of the composite pot 219, the composite pot 219 does not extend all the way to the second end 211 of the channel 209. It stops partially through the cylindrical section 229. This reduces the possibility of getting the curable sealing material 303 on the threaded exterior of the cylindrical section 229.

[0142] as Figure 3B As in the embodiment of the present invention, the outer surface 271 of the composite tank includes a platform 281 formed in the rim 283, which engages with a step 285 formed in the inner surface 275 of the first body member 225 to hold the tank 219 from being pulled out in the direction toward the first end 211. The outer surface 271 narrows inwardly from the rim 283 toward the first end 211 to form a tapered area 295. The inner surface 275 of the first body portion 225 includes a matching tapered portion 297.

[0143] Thus, the matching tapers of the composite tank 219 and the first body member 225 act as a first line of defense against intrusion from the first end, forming a good seal, especially if the composite tank 219 is to be formed of a hard, compressible elastomer. Compression of the composite tank 219 will ensure a good seal between the two surfaces 271, 275. The platform 281 and the step 285 provide a second line of defense, especially if strongly compressed when first installed. These seals do not require a separate flame path.

[0144] As previously described, when the composite pot 219 is filled with the curable sealing material 303, the material will abut the brass socket 255. Having the curable sealing material 303 seated on this metal element means that the resin cannot move further rearward (toward the first end 213), which would not necessarily be the case if the curable sealing material was seated on a resilient member.

[0145] The composite pot again uses the hook portions 267 to clip onto and seal against corresponding hook portions 271 on the plug 255. This allows the composite pot 219 to be easily attached to the socket 255 and forms a seal that prevents the curable sealing material from escaping during installation.

[0146] The elastomeric wiper seal 375 forms a barrier between the inner jacket 301 and the bore of the socket 255, further preventing uncured curable sealing material from penetrating the joint.

[0147] In the attached figure Fig. 9 Another alternative embodiment of the cable connector is shown in FIG. Figures 1A to 1C Equivalent features of the embodiments have been given reference numerals increased by 400.

[0148] In this embodiment, the composite can 419 has the form of a brass body with a cylindrical outer surface 471 and a cylindrical passage 550 therethrough. It has a taper 495 whose diameter narrows inwardly away from the second end 411 (rather than tapering outwardly as in other embodiments). This tapered end 495 is located in the socket 455 to provide a seal and prevent the contents of the can from being pushed out. The first body portion 425 has a step reduction 551 in the inner diameter of the hole at its second end 411 to retain the composite can 419. There is a gap 552 between the composite can 419 and the passage 209 of the first body portion 425 to provide a flame path.

[0149] The outer surface 471 is completely cylindrical, with no steps or shoulders; this is easily machined, typically on a centerless grinder.

[0150] When in use, the connector should be Figures 10 to 13 Assemble as shown. Fig.10 In the embodiment, the first body portion 425, the composite tank 419 and the socket 455 are separated. Fig.11 In the embodiment, the tapered end 495 is inserted into the socket 455. Fig.12 , the first body portion 425 and the socket retaining nut 555 are used to press the composite can 419 onto the socket 455 (via the action of the step 551 on the composite can 419). The first body portion 425 can then be removed ( Fig.13), leaving the composite pot 419 fixed to the socket 455, ready to receive the cable 403 and the liquid curable sealing material 503. However, if the curable sealing material 503 is putty rather than liquid, the cable 403 and the curable sealing material 503 will be installed before crimping.

[0151] As discussed above with respect to the armor clip, there is typically a grounding bond to connect the grounding sheath 701 of the cable to the metal body of the cable connector. Figures 14 to 17 Another embodiment of the present invention shown in FIG. 1 shows an alternative embodiment of such grounding combination. This embodiment is used as an example of the accompanying drawings. Figure 7 and Figure 8 Embodiments of Figures 1A to 1C Features equivalent to those of the embodiments of the present invention are given corresponding reference numerals increased by 600.

[0152] In this embodiment, a wire grounding clip 750 is disposed in the socket 655. It comprises a single bent wire segment received within a groove 751 in the socket 655. Additionally or alternatively, it may be retained by welding or gluing or by crimping.

[0153] In the attached figure Fig.16 and Fig.17 Two alternative forms of conductor grounding clips 750 are shown in FIG. In both cases, the clip 750 is formed by a base ring 752a, 752b in the form of an arc of a circle. This relies on a number of prongs formed as bends in the conductor.

[0154] exist Fig.16 In the embodiment, there are two pins 753a, each formed at the end of the wire, bent axially and radially inwardly away from the base ring 752a relative to the arc. The end 754a of each pin 753a has a return bend 754a so that the sheath 701 is only contacted by the bent wire, not by a possible sharp end.

[0155] exist Fig.17 In the embodiment of the present invention, there are still two pins 753b at one end of the wire, but there is also an additional center pin 753c formed by a U-shaped offset from the base ring 752b. This can center the wire grounding clip on the sheath 701.

[0156] The wire may be any conductive metal wire. It may be tempered to increase its spring properties and may be plated to improve conductivity.

[0157] Now return to Figures 1A to 1C Examples of Figure 1B As shown, the clamp 21 is formed by a clamping element 21b arranged around a cylindrical silicone sleeve 21a. FIG. 4A to FIG. 4CThe clamping member 21b is shown in more detail.The sleeve 21a and the clamping element 21b may be formed from separate components, or from a single integral piece.

[0158] The clamping member 21b is formed by an annular body 99 defining a channel 101 having an axial length parallel to the axial direction A of the channel 9 of the cable connector 1. The channel 101 in the clamp body 99 extends between a first end 103 and a second end 105. The body has an inner surface 107 engaging the sleeve 21a, which in turn engages the insulating sleeve of the cable 3. The body also has an outer surface 109 diametrically opposite the inner surface 107.

[0159] The body 99 is formed of a number of elongated fingers 111. The fingers 111 extend in a direction generally from the first end 103 to the second end 105. However, the fingers 111 do not extend parallel to the axial direction A. Instead, each finger 111 also extends a short circumferential distance as it extends from the first end 103 to the second end 105.

[0160] Adjacent fingers 111 extend in opposite circumferential directions. For example, if a first finger 111a extends clockwise from the first end 103 to the second end, a second finger 111b circumferentially adjacent to the first finger 111b extends counterclockwise from the first end 103 to the second end 105, while a third finger 111c adjacent to the second finger 111c extends clockwise. In this way, tapered gaps 113 are formed between the fingers, wherein the tapers of adjacent gaps extend in alternating directions (e.g., a first gap 113a narrows from the first end to the second end, a second gap 113b adjacent to the first gap 113a widens from the first end to the second end, and a third gap 113c adjacent to the second gap 113b narrows again).

[0161] The gap 113 is bridged by a hinge section 115 that joins the fingers 111. The hinge section 115 is flexible and allows the fingers 111 to move relative to each other. In the example shown, the hinge section 115 is formed by a living hinge in which the material of the body 99 is narrowed compared to the fingers 111.

[0162] One hinge section 115 is disposed between each pair of fingers 111. Hinge sections 115 are also disposed at the narrowest point of each gap 113, such that hinge sections 115 are disposed at alternating ends. Thus, using the above example, hinge section 115a between first finger 111a and second finger 111b is disposed at second end 105, the hinge between second finger 111b and third finger 111c is disposed at the first end, and so on.

[0163] Each finger has a flat clamping surface 117 that faces the sleeve 21b and forms part of the inner surface 107 of the body 99. The clamping surfaces 117 are substantially parallelogram in shape and provide a large surface area for clamping the cable 3. Each clamping surface 117 has a pair of parallel spaced sides extending from the first end 103 and the second end 105. The arrangement of the fingers 111 non-parallel to the axial direction A causes each edge to travel a short distance around the circumference of the channel.

[0164] On the outer surface of the body there is a flat central region 119, with tapered regions 121, 123 formed at either end of the central region 119. In these tapered regions 121, 124, the thickness of the body 99 narrows towards the respective end portions 103, 105. Thus, the end portions include inclined surfaces 125, 127.

[0165] In use, the clamp 21 fits within a portion of the channel formed by the second body portion 27. As described above, a cable is provided through the clamp 21 such that the sleeve 21a engages the cable and the clamping member 21b exerts a clamping force on the cable 3 through the sleeve 21a.

[0166] The annular ring 69 includes an inclined surface 129 corresponding to the inclined end 125 of the clamp 21, and the axial surface 63 of the socket retaining nut 47 is similarly inclined to engage the end 127 of the clamp 21. As described above, when the connector 1 is assembled, the body portions 25, 27 are threaded together. Tightening the threads applies pressure between the first end 11 and the second end 13 of the connector 1. This compression causes the clamp 21 to engage with the corresponding drive surfaces 63, 129 to compress the clamp 21 in the axial direction. This causes the clamp 21 to deform, thereby reducing the diameter of the passage 101 through the clamping member 21b, causing it to engage with the cable and exert a clamping force on the cable. When the cable is clamped by the clamp 21 in this manner and the cable 3 moves laterally, the clamp 21 engages one of these clamp drive surfaces 63, 129, which prevents movement of the cable 3. The first and second body portions 25 , 27 and the clamp may be sized and incorporated such that when a lateral force is applied there is no lateral movement and the clamp 21 is always in contact with the clamp drive surfaces 63 , 129 .

[0167] Due to one or more of the shape of the fingers 111, the alternating shape of the gaps 113, the alternating ends of the hinges 115, and the drive surfaces 63, 129 at both ends of the clamp, the clamp provides a uniform clamping force over its axial length.

[0168] The clamp 21 can accommodate cables having a range of diameters. By varying the tightening of the threads between the body portions 25, 27, variations in cable size are accommodated by increasing the amount of compression between the ends 11, 13 of the connector 1. This varies the deformation of the clamp 21. Thus, wider cables 3 require less compression to cause the clamp 21 to clamp the cable 3.

[0169] In other examples, different clamps 21 may be provided for cables of different diameters. For example, a single clamp 21 may accommodate cables 3 having diameters within a first range, but to accommodate cables outside the first range, separate clamps 21 of different sizes are provided. Likewise, by varying the compressive force on the clamp 21, the second clamp is able to receive cables having diameters within a second range. The first range and the second range may or may not overlap.

[0170] The clamping force applied by the clamping surface 117 enables greater forces to be resisted by the clamp 21. The clamp 21 may also provide some protection against intrusion through the action of the sleeve 21a engaging the cable around its diameter.

[0171] In one example, the clamp can achieve 100% of the pull-out force defined by the International Electrotechnical Commission (IEC) standard (IEC60079-0:21012+A11:2013). The IEC standard defines the axial force that the clamp should resist. The force depends on the diameter. The percentage indicates the level of force that the clamp can resist.

[0172] Figure 5 A first example of an anti-intrusion seal 23 is shown. The seal 23 is annular and is integrally bonded to the second end 13 of the body 5 of the cable connector 1 (and hence to the back nut 27) such that the seal is external to the body 5.

[0173] The anti-intrusion seal 23 has an annular retaining lip 131 extending around the circumference of the second end 13 of the body 5. The retaining lip 131 is located on a corresponding lip 67 formed in the body 5. The retaining lip 131 prevents the seal from moving in the axial direction from the first end 11 to the second end 13. The annular ring 69 is seated on the retaining lip 131 and prevents the seal from moving in the opposite direction when the joint 1 is assembled in place with the clamp 21. The seal 23 can also be fastened to the body by adhesive, bonding, overmolding, etc.

[0174] The seal 23 includes a sealing portion 133 extending across the second end 13 of the body 5 in a boundary defined by the retaining portion 131. A centrally formed opening 135 defined by a mouth 137 is provided through the sealing portion 133. A thickened lip 139 is formed at the mouth 137. In use, the mouth 137 engages the cable 3 to form a seal.

[0175] exist Figure 5 In the example shown, the sealing portion 133 extends axially and radially so that it forms a truncated cone 143 having a cavity or void 141 defined within the cone. Prior to insertion of the cable, the truncated cone 143 extends into the passage 9 of the connector 1. However, the action of inserting the cable 3 in the direction from the first end 11 toward the second end 13 flips the seal 23 so that the cone 143 extends outside the passage.

[0176] The anti-intrusion seal 23 forms a seal between the body 5 of the connector 1 and the insulating outer sheath of the cable 3 to prevent the intrusion of material from the external environment into the enclosure in which the connector 1 is mounted.

[0177] As mentioned above, in addition to the anti-intrusion seal 23, the cable joint 1 may also include a separate explosion-proof seal. The explosion seal is arranged in the body 5 of the joint 1 between the armor clamp 53 and the composite tank 19, and forms a seal between the cable joint 1 and the insulating inner jacket of the joint 1. Any suitable type of explosion-proof seal may be used. For example, the explosion-proof seal may be a compression seal, such as an elastomeric ring, which is compressed onto the cable when the joint 1 is tightened. Alternatively, the seal may be non-compressive, such as a silicone cone supported by a cage.

[0178] The explosion-proof seal can prevent the explosive force from escaping from the enclosure and entering the external environment. The explosion-proof seal is received in the body, and for the sake of clarity, it is not shown. It can be understood that the plug formed in the composite tank 19 also provides some effect of preventing the explosive force from escaping the enclosure between the cores of the cable 3.

[0179] FIG. 6A to FIG. 6C An alternative arrangement of the anti-intrusion seal 23 is shown.

[0180] Fig. 6A The example shown in is similar to Figure 5 . However, in this example, the seal 23 is overmolded onto the lip 67 in the body 5. The annular ring 69 does not serve to retain the seal 23, but is still required to provide a driving surface 129 for the clamp 21 so that there is sufficient travel in the joint for the clamp to engage a range of different cable diameters. During the overmolding process, the annular ring 69 is not in place in order to provide a gap inside the joint for the material of the seal 23 to move into. Once the overmolding is complete, the seal is pulled out of the joint 1 and the ring is then assembled in place.

[0181] exist Figure 6BIn the example shown, the shape of the seal 23 is not conical. In this example, the seal 23 includes a retaining portion 131 formed by an annular wall 145 around the outer circumference of the seal 23 and along the axial direction A. Several protrusions 147 extend radially from the wall 145 and engage in corresponding protrusions 149 formed in the end 13 of the body 5 to bond the seal 23 to the body 5. In addition, the seal 23 can also be bonded to the body 5 by an adhesive or the like.

[0182] exist Figure 6B In the example shown, the sealing portion 133 includes an inner annular wall 151 and a radially extending side wall 159, the inner annular wall 151 being concentrically arranged within the retaining wall 145 and extending in the axial direction A, the radially extending side wall 159 being located between the retaining wall 145 and the inner wall 151. The annular wall 151 defines an opening 135 through which the cable 3 passes. A plurality of arcuate ribs 153 extend between the walls 145, 151, extending axially from the side wall 159, defining a gap or cavity 163 between the ribs 153 and the walls 145, 151. The ribs 153 also provide strength in the axial direction A, preventing the silicone element from being pulled into the joint. For additional strength, the ribs can be part of the molded plastic ring, rather than just silicone.

[0183] Figure 6C The seal 23 shown in FIG. 1 includes an outer annular wall 155. A pair of axially spaced side walls 159 extend from the axial edges of the outer wall 155 and meet at the mouth 137 to define the opening 135. Thus, the outer wall 155 and the side walls 159 define an annular, closed space 161.

[0184] An annular protrusion 165 having a "T" shaped cross section extends radially outward from the outer wall 155. It engages with a corresponding groove 167 in the body 5 to retain the seal 23. In addition, the seal 23 may also be bonded to the body 5 by an adhesive or the like.

[0185] Figure 5 and FIG. 6A to FIG. 6C The seals 23 shown in FIG. 1 are non-compressive in that they do not require the action of tightening the body portions 25, 27 or the clamp to form a seal. Therefore, if the clamp 21 becomes loose or broken, the cable 3 can move axially without compromising the seal. Any compression is accommodated by the voids 141, 161, 163 rather than the cable 3.

[0186] The body 5, the socket retaining nut 47, the armor clamp ring 53, the socket 55 and the annular ring 69 are made of brass or other suitable materials. The material should be selected to operate in a temperature range of -60 degrees Celsius to +135 degrees Celsius and a pressure range of 450psi to 3000psi (about 3MPa to 21MPa). At least the armor clamp ring 53 and the body 5 should be made of conductive material to provide a grounding path for the shielded cable 3.

[0187] The can 19 may be formed of any suitable transparent or translucent material that enables inspection of the stopper. The can 19 should be rigid enough to form a sleeve, but should be deformable enough to form a seal. For example, the can 19 may be silicone.

[0188] The clamp 21 should be insulating because it clamps the insulating outer sheath of the cable. In addition, the clamp 21 should be formed of a resiliently deformable material. Any suitable insulating material can be used to form the clamp 21. For example, the clamp can be formed of silicone rubber, thermoplastics, etc. The sleeve 21a and the clamping member 21b can be the same or different materials. In some examples, the clamp 21 can have metal parts, but these will need to be grounded.

[0189] As described above, the anti-intrusion seal 23 can be formed of rubber silicone. Alternatively, the anti-intrusion seal 23 can be formed of other suitable materials, such as silicone rubber or any other rubberized material, such as thermoplastic elastomer (TPE), neoprene, ethylene propylene diene monomer (EPDM), etc.

[0190] The arrangement of the body 5 discussed above is given by way of example only. The body 5 may be formed of two parts 25, 27, but arranged in a different manner. For example, in the above-described embodiment, a portion of the inlet (the first body part 25) is received within the support nut (the second body part 27). This is not necessarily the case, and the support nut 27 may be received within the inlet 25, or other arrangements may be employed. Furthermore, the socket 55 and the socket retaining nut 47 may be secured in the passage 9 in any other suitable manner.

[0191] Furthermore, the clamp drive surfaces 125, 127 may be formed in any suitable manner.

[0192] In some examples, some components may be formed as a single part. For example, one or both of the clamp drive surfaces 125, 127 may be integrally formed with one of the body portions 25, 27. Additionally, the socket retaining nut 47 may be integrally formed with one of the body portions.

[0193] In other examples, other components not discussed may be received in channel 9 .

[0194] The canister 19 discussed above is given as an example only. The canister may have any suitable shape to enable it to slide out of the passage 9 for inspection and to form a seal under compression. For example, only a portion of the outer surface 71 may be tapered. Furthermore, in some examples, the taper on the inner surface 75 may match the taper on the outer surface 71.

[0195] Similarly, the clamp 21 and clamping member 21b discussed above are given by way of example only. Any suitable shape of longitudinal extension may be used in place of the above-described finger 111, so that the clamp 21 forms a collet-type body 99 with a correspondingly shaped gap 113. Similarly, any suitable hinge 115 may be used at alternating ends 103, 105 of the clamp body 99.

[0196] In some examples, the clamp 21, sleeve 21a, or clamping ring (not shown) can help to radially and axially position the clamp within the channel 9. In addition, any suitable protrusion extending into the channel 9 can be used as a driving surface for the clamp 21. In some examples, the sleeve 21a can be omitted, and the clamping member can directly clamp the cable.

[0197] The clamp 21 discussed above also provides some anti-intrusion functionality. However, this is not necessarily the case when a separate anti-intrusion seal is provided.

[0198] In use, the clamp 21 is clamped onto the insulating outer sheath of the cable 3. Within the channel 9 of the cable joint body, the outer sheath is stripped away so that the armor clamp 53 can clamp the grounding sheath. After the armor clamp 53, the inner sheath is also stripped away so that for at least a portion of the composite tank, a plug is formed around the insulating jacket of each conductive core. At least a portion of the composite tank 19 can also form a plug around the insulating inner sheath.

[0199] In the above description, the cable joint 1 includes the anti-intrusion seal 23 as described above, the clamp 21 as described above, the sealing pot 19 as described above, and the two main body parts 5 as described above. It should be understood that the cable joint 1 may include any one of the components as described above, or any combination of two or more of the components as described above, and the other components may be replaced by any suitable alternatives. For example, any anti-intrusion seal may be used instead of the above-mentioned seal. The anti-intrusion seal may be compressible or non-compressible. Similarly, any suitable clamp may be used instead of the above-mentioned clamp. In addition, the sealing pot and the main body may also be arranged in any suitable manner and may have any number of components.

[0200] In the attached figure Figures 18 to 20 In another embodiment of the cable connector shown in , we show how to indicate to the user of the cable connector that the cable connector has been properly tightened. Figures 1A to 1C Features equivalent to those of the embodiments have been given corresponding reference numerals increased by 800.

[0201] In this embodiment, attention will be focused on the support nut 827, which is shown here as being screwed onto the intermediate nut 950 (although the same would apply if the support nut 827 was screwed directly onto the first body portion or inlet as described in the previous embodiments). Figures 1A to 1C As in the embodiment of FIG. 8 , tightening of the support nut serves to compress the clamp 821. We have recognized that the compression of the clamp 821 and thus the reduction in the diameter D of the clamp 821 is associated with the linear travel L of the support nut 827.

[0202] Thus, the intermediate nut 950 (or whatever component the back nut 827 is tightened onto) can be marked with a marking 951 that gives an indication of the diameter of the clamp 821. This way, the user can know that if they tighten the back nut to the diameter of the cable being used, the clamp 821 will properly engage the cable. While the relationship between the clamp diameter and the back nut travel may not be perfectly consistent (especially for cables of varying stiffness), the scale can at least roughly indicate the correct position for a given diameter cable.

[0203] Applications of the present invention include but are not limited to:

[0204] - Joint assemblies for armoured electrical or optical fibre cables or pipes or conduits;

[0205] - Joint assemblies for unarmoured electrical or optical fibre cables or pipes or conduits;

[0206] - a shielded connector assembly for an electrical or optical fibre cable or a pipe or conduit; and

[0207] - A shieldless connector assembly for use with electrical or optical fiber cables or pipes or conduits.

[0208] Although the present invention has been described with reference to exemplary embodiments, it should be understood that we do not wish to limit the present invention thereto and that various modifications and changes may be made without departing from the principles and concepts of the present invention.

[0209] It will be apparent to those skilled in the art and fields encompassed herein that other modifications and variations can be made without departing from the principles and concepts described herein.

[0210] It will also be understood that the present invention extends to and includes any novel feature or novel combination of features described herein.

Claims

1. A cable connector, comprising: a body having a wall defining a passage extending in an axial direction from a first end to a second end, said passage of said cable connector being arranged to receive a cable; a cable joint sealing member adjacent to the first end of the cable joint body, received within the passage of the cable joint, the cable joint sealing member comprising: A sleeve arranged to be slidably received in a passage defined in a body of a cable connector, the sleeve being arranged to receive a curable sealing material for forming a seal with a cable passing through the sleeve, the sleeve comprising: a first end having an annular sidewall of constant diameter extending partially along the axial length; a second end, opposite to the first end, the second end of the sleeve comprising a rim capable of engaging a platform formed on an inner surface of the cable connector body to prevent the sleeve from being pulled out in an axial direction toward the first end; a tapered portion extending between the first end and the second end, the tapered portion having a larger outer diameter proximate the second end; wherein the outer surface of the tapered portion of the sleeve is arranged to form a seal with the cable connector body; The cable connector also includes: a cable passing through the cable connector body and the sealing member; and a cured sealing material received in the sleeve to form a seal between the sleeve and the cable; a cable splice clamp received in the passage of the cable splice and arranged to clamp a cable passing through the passage of the cable splice to prevent axial movement of the cable, The clamp comprises an insulating sleeve arranged to receive and clamp the insulating outer sheath of the cable and a clamping member arranged around the sleeve, wherein the clamping member comprises a body formed of an insulating material, and the clamping member body has: an inner surface defining a passage extending through the clamping member body in an axial direction from a first end to a second end, the clamping member passage being arranged to receive a cable and exert a clamping force on the insulating outer jacket of the cable through the insulating sleeve; and an outer surface arranged to engage the cable connector body to prevent movement of the clamp from the cable connector body in the axial direction, wherein the clamping member body is formed by a plurality of longitudinal portions and a plurality of hinge portions, each longitudinal portion extending from a first end of the clamping member body to a second end of the clamping member body, the plurality of hinge portions connecting circumferentially adjacent longitudinal portions; and wherein the hinge portions are arranged at alternating ends of the clamping member body around the circumference such that the longitudinal portions are joined at alternating ends of the clamping member body.

2. The cable connector according to claim 1, wherein: Each of the longitudinal portions includes a clamping surface having a length extending from a first end of the clamping member body to a second end of the clamping member body and a width extending around a portion of a circumference of the clamping member body; and wherein the clamping surfaces of the longitudinal portions engage an outer surface of the sleeve.

3. The cable connector according to claim 1, wherein: Adjacent longitudinal portions are spaced apart from each other to form a gap extending from the first end of the clamping member body to the second end of the clamping member body and from the inner surface to the outer surface, and wherein the hinge portion bridges the gap at the first end of the clamping member body or the second end of the clamping member body.

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