CN108963954B - Sealing assembly and oil-filled cable terminal - Google Patents
Sealing assembly and oil-filled cable terminal Download PDFInfo
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- CN108963954B CN108963954B CN201810996747.5A CN201810996747A CN108963954B CN 108963954 B CN108963954 B CN 108963954B CN 201810996747 A CN201810996747 A CN 201810996747A CN 108963954 B CN108963954 B CN 108963954B
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- filled cable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
- H02G15/22—Cable terminations
- H02G15/23—Cable-end sealings
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- Gas Or Oil Filled Cable Accessories (AREA)
Abstract
The invention discloses a sealing component of an oil-filled cable terminal, which comprises: a metal tube; a first elastic sealing member molded on an outer peripheral surface of the metal tube for effecting axial sealing of the oil-filled cable terminal; and a second elastomeric seal molded over the end of the metal tube for effecting radial sealing of the oil-filled cable termination. In the invention, the first elastic sealing element and the second elastic sealing element of the sealing assembly can respectively realize axial sealing and radial sealing of the oil-filled cable terminal, so that the sealing performance of the oil-filled cable terminal is improved. In addition, the metal pipe of the sealing assembly has good conductive performance, and the grounding performance of the cable is improved.
Description
Technical Field
The invention relates to a sealing assembly of an oil-filled cable terminal and the oil-filled cable terminal comprising the sealing assembly.
Background
High voltage oil filled power cable termination products are currently the primary product form of high voltage power cable terminations. In particular, almost all outdoor cable terminals in an extra-high voltage cable terminal product system are oil-filled cable terminal products. However, since the oil-filled cable terminal needs to be filled with insulating oil therein, an axial seal and a radial seal are required at the bottom of the oil-filled cable terminal product. The radial sealing of the surface of the cable is very difficult due to the creeping of the cable in the operation process, and the oil leakage phenomenon of an oil-filled terminal product is easy to occur. In addition, the design of the sealing portion must also be considered for reliable electrical connection. Since the sealing material of the sealing portion is generally a non-metallic elastic material. Therefore, in the case of poor grounding, damage to the cable or failure of the cable system may be caused.
Disclosure of Invention
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
According to an aspect of the present invention, there is provided a seal assembly of an oil-filled cable terminal, comprising: a metal tube; a first elastic sealing member molded on an outer peripheral surface of the metal tube for effecting axial sealing of the oil-filled cable terminal; and a second elastomeric seal molded over the end of the metal tube for effecting radial sealing of the oil-filled cable termination.
According to an exemplary embodiment of the invention, the first resilient seal is adapted to be axially pressed against a base plate for mounting the oil-filled cable terminal in order to achieve an axial seal between the oil-filled cable terminal and the base plate.
According to another exemplary embodiment of the invention, the second elastic seal is an interference fit with a cable extending into the oil-filled cable terminal to achieve a radial seal between the oil-filled cable terminal and the cable.
According to another exemplary embodiment of the invention, the first resilient seal comprises a base portion, a rim portion and a connecting portion connecting the base portion and the rim portion; the base portion is directly joined to the outer peripheral surface of the metal pipe, the edge portion protrudes toward both sides in the axial direction with respect to the connecting portion, and the edge portion is adapted to be pressed axially against the bottom plate to effect the axial seal.
According to another exemplary embodiment of the present invention, the edge portion protrudes toward both sides in the axial direction by 1 to 5mm with respect to the connecting portion.
According to another exemplary embodiment of the present invention, the edge portion protrudes towards both sides in the axial direction with respect to the connecting portion by 1mm, 2mm, 3mm, 4mm or 5mm, respectively.
According to another exemplary embodiment of the invention, the edge portion of the first resilient seal is substantially circular in cross-section; the base of the first resilient seal is generally trapezoidal in cross-section and tapers radially outwardly; the connecting portion of the first resilient seal is substantially rectangular in cross-section.
According to another exemplary embodiment of the invention, the second resilient sealing element has a through hole allowing the processed end of the cable to pass through, the through hole having an inner diameter smaller than an outer diameter of the end of the cable, such that the end of the cable is in interference fit with the through hole to achieve the radial seal.
According to another exemplary embodiment of the invention, the inner diameter of the through hole of the second resilient sealing element is 90% to 96% of the outer diameter of the end of the cable.
According to another exemplary embodiment of the present invention, the inner diameter of the metal tube is larger than the outer diameter of the end of the cable; and a gap between an inner surface of the metal tube and an outer surface of an end of the cable is within a range of 5 to 10 mm.
According to another exemplary embodiment of the present invention, an axis of the metal tube coincides with an axis of the through hole of the second resilient seal to ensure that the end of the cable passing through the metal tube and the through hole is centrally positioned in the metal tube.
According to another exemplary embodiment of the invention, the first and second elastic seals are made of the same oil-resistant elastic material or of different oil-resistant elastic materials.
According to another exemplary embodiment of the present invention, the metal tube is made of a non-magnetic, electrically conductive metal material.
According to another exemplary embodiment of the present invention, the metal tube is made of copper or aluminum.
According to one aspect of the invention, there is provided an oil-filled cable termination comprising the aforementioned seal assembly.
According to an exemplary embodiment of the present invention, the oil-filled cable terminal further comprises a support plate and a tail pipe, which are fitted over the cable, adapted to be fixed to one side of a bottom plate for mounting the oil-filled cable terminal; when the support plate and tailpipe are secured to the base plate, the support plate compresses the first elastomeric seal of the seal assembly in the groove of the base plate, thereby effecting an axial seal between the oil-filled cable terminal and the base plate.
According to another exemplary embodiment of the present invention, the oil-filled cable terminal further comprises an insulator, the insulator is sleeved on the cable and is adapted to be fixed to the other side of the bottom plate, and the insulator and the bottom plate are sealed by an O-ring.
According to another exemplary embodiment of the invention, the oil-filled cable terminal further comprises a first semi-conductive strip wound around the metal tube of the sealing assembly and the metal sheath of the cable, a first metal shielding strip wound around the first semi-conductive strip, and a first insulating strip wound around the first metal shielding strip.
According to another exemplary embodiment of the invention, the oil-filled cable terminal further comprises a second semiconductive tape, a second metallic shielding tape, and a second insulating tape, the second semiconductive tape being wound around the metal tube and the second elastomeric seal of the sealing assembly and the outer semiconductive layer of the cable, the second metallic shielding tape being wound around the second semiconductive tape, the second insulating tape being wound around the second metallic shielding tape.
According to another exemplary embodiment of the present invention, the oil-filled cable terminal further includes a first heat shrinkable tube heat shrunk on the tail tube and the cable, and a second heat shrinkable tube heat shrunk on the second insulating tape.
According to another exemplary embodiment of the present invention, the oil-filled cable terminal further comprises a waterproof sealing tape wound around the first insulating tape.
According to another exemplary embodiment of the present invention, the oil-filled cable terminal further comprises a copper braid located between the metal sheath and the first metal shielding tape, one end of the copper braid and the first metal shielding tape is fastened with copper wire in the first annular groove of the metal tube of the sealing assembly, and the other end is fastened with copper wire on the metal sheath of the cable;
one end and the other end of the copper braided tape and the first metal shielding tape are welded to the metal tube and the metal sheath, respectively, after being fastened.
According to another exemplary embodiment of the present invention, the other end of the second metallic shielding tape is tied with a copper wire in a second annular groove of the metallic tube of the sealing assembly; the other end of the second metallic shielding tape is welded to the metallic tube after being fastened.
According to another exemplary embodiment of the invention, the oil-filled cable termination further comprises a copper braid located between the metal sheath and the first metal shielding tape, the copper braid being welded at one end to the metal tube of the sealing assembly and at the other end to the metal sheath of the cable.
According to another exemplary embodiment of the present invention, the base plate and the tail tube are adapted to be connected with a ground terminal for grounding the oil-filled cable terminal.
In each of the foregoing exemplary embodiments according to the present invention, the first elastic seal and the second elastic seal of the seal assembly may respectively realize axial sealing and radial sealing of the oil-filled cable terminal, which improves the sealing performance of the oil-filled cable terminal. In addition, the metal pipe of the sealing assembly can improve the convenience and reliability of grounding, and the grounding reliability of the cable is improved.
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
Drawings
FIG. 1 shows a schematic view of a seal assembly according to an embodiment of the invention;
fig. 2 shows a schematic view of an oil-filled cable termination according to an embodiment of the invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to one general technical concept of the present invention, there is provided a sealing assembly of an oil-filled cable terminal, including: a metal tube; a first elastic sealing member molded on an outer peripheral surface of the metal tube for effecting axial sealing of the oil-filled cable terminal; and a second elastomeric seal molded over the end of the metal tube for effecting radial sealing of the oil-filled cable termination.
FIG. 1 shows a schematic view of a seal assembly 101 according to one embodiment of the present invention; fig. 2 shows a schematic view of an oil-filled cable termination 10 according to an embodiment of the invention.
As shown in fig. 1 and 2, in the illustrated embodiment, the sealing assembly of the oil-filled cable terminal mainly includes: a metal tube 1012, a first resilient seal 1011 and a second resilient seal 1013.
To achieve good electrical shielding and reliability of grounding to the cable 113, in one exemplary embodiment of the invention, the metal tube 1012 may be made of a non-magnetic, electrically conductive metal material. For example, the metal tube 1012 may be made of copper or aluminum.
As shown in fig. 1 and 2, in the illustrated embodiment, a first resilient seal 1011 is molded onto the outer peripheral surface of the metal tube 1012 for effecting an axial seal of the oil-filled cable terminal 10. A second elastomeric seal 1013 is molded over the end of the metal tube 1012 for effecting a radial seal of the oil filled cable termination 10.
In the illustrated embodiment, as shown in fig. 1 and 2, because the first and second elastomeric seals 1011, 1013 are molded onto the metal tube 1012, the entire seal assembly 101 is a one-piece seal assembly, which provides great ease of installation and use.
As shown in fig. 1 and 2, in the illustrated embodiment, the first elastic seal 1011 may be made of an elastic material having a relatively high oil resistance, for example, an elastic rubber material. Similarly, the second resilient sealing member 1013 may be made of a resilient material having good oil resistance, for example, a resilient rubber material.
In an exemplary embodiment of the present invention, first elastomeric seal 1011 and second elastomeric seal 1013 may be made from the same oil resistant elastomeric material or may be made from different oil resistant elastomeric materials.
As shown in fig. 1 and 2, in the illustrated embodiment, the first resilient seal 1011 is adapted to be axially compressed against the base plate 110 for mounting the oil-filled cable terminal 10 to effect an axial seal between the oil-filled cable terminal 10 and the base plate 110.
As shown in fig. 1 and 2, in the illustrated embodiment, the second elastomeric seal 1013 is an interference fit with the cable 113 extending into the oil-filled cable terminal 10 to achieve a radial seal between the oil-filled cable terminal 10 and the cable 113.
As shown in fig. 1 and 2, in the illustrated embodiment, the first elastic seal 1011 includes a base 1011a, an edge 1011b, and a connecting portion 1011c connecting the base 1011a and the edge 1011 b.
As shown in fig. 1 and 2, in the illustrated embodiment, the base 1011a of the first elastic seal 1011 is directly joined to the outer peripheral surface of the metal pipe 1012. An edge portion 1011b of the first elastic seal 1011 projects toward both sides in the axial direction with respect to the connecting portion 1011 c. The edge portion 1011b of the first resilient seal 1011 is adapted to be pressed axially against the base plate 110 to effect an axial seal between the oil-filled cable terminal 10 and the base plate 110.
As shown in fig. 1 and 2, in an embodiment of the present invention, the edge portion 1011b of the first elastic seal 1011 may protrude toward both sides in the axial direction by 1 to 5mm with respect to the connecting portion 1011 c. For example, the edge portion 1011b of the first elastic seal 1011 may project toward both sides in the axial direction by 1mm, 2mm, 3mm, 4mm, or 5mm, respectively, with respect to the connecting portion 1011 c.
As shown in fig. 1 and 2, in the illustrated embodiment, the edge portion 1011b of the first resilient seal 1011 is substantially circular in cross-section. The base 1011a of the first resilient seal 1011 is generally trapezoidal in cross section and tapers radially outwardly. The connecting portion 1011c of the first elastic seal 1011 has a substantially rectangular cross section. Accordingly, the first elastic seal 1011 is butterfly-shaped as a whole, and thus, the first elastic seal 1011 may be referred to as a butterfly-shaped seal.
As shown in fig. 1 and 2, in the illustrated embodiment, the second elastic seal 1013 has a through hole 1013a that allows the processed end 113a of the cable 113 to pass through. The inner diameter of the through bore 1013a of the second elastic seal 1013 is smaller than the outer diameter of the end 113a of the cable 113, so that the end 113a of the cable 113 is in interference fit with the through bore 1013a to achieve a radial seal between the oil-filled cable terminal 10 and the cable 113.
In an exemplary embodiment of the present invention, the inner diameter of the through hole 1013a of the second elastic sealing member 1013 may be 90% to 96% of the outer diameter of the end 113a of the cable 113. That is, the inner diameter of the through hole 1013a of the second elastic seal 1013 may be 4% to 10% smaller than the outer diameter of the end 113a of the cable 113.
As shown in fig. 1 and 2, in the illustrated embodiment, the inner diameter of the metal tube 1012 is greater than the outer diameter of the end 113a of the cable 113. The end 113a of the cable 113 passes through the metal pipe 1012 without contacting the metal pipe 1012. In one embodiment of the present invention, the gap between the inner surface of the metal pipe 1012 and the outer surface of the end portion 113a of the cable 113 may be in the range of 5 to 10 mm.
As shown in fig. 1 and 2, in the illustrated embodiment, the axis of the metal tube 1012 coincides with the axis of the through-hole 1013a of the second elastic seal 1013 to ensure that the end 113a of the cable 113 passing through the metal tube 1012 and the through-hole 1013a is centrally positioned in the metal tube 1012.
In another embodiment of the present invention, as shown in fig. 2, an oil filled cable termination 10 is also disclosed. The oil-filled cable termination 10 includes a seal assembly 101 shown in fig. 1.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes a support plate 107 and a tail tube 108. The support plate 107 and the tail pipe 108 are fitted over the cable 113, adapted to be fixed to one side of the base plate 110 for mounting the oil-filled cable terminal 10.
As shown in fig. 2, in the illustrated embodiment, when the support plate 107 and tailpipe 108 are secured to the base plate 110, the support plate 107 compresses the first resilient seal 1011 of the seal assembly 101 in a groove of the base plate 110, thereby effecting an axial seal between the oil-filled cable terminal 10 and the base plate 110.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes an insulator 114, the insulator 114 is disposed on the cable 113 and is adapted to be fixed to the other side of the bottom plate 110, and the insulator 114 and the bottom plate 110 are sealed by an O-ring (not shown).
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes a first semi-conductive strip 102a, a first metallic shielding strip 103a, and a first insulating strip 104a, the first semi-conductive strip 102a being wound around the metallic tube 1012 of the sealing assembly 101 and the metallic sheath 111 of the cable 113, the first metallic shielding strip 103a being wound around the first semi-conductive strip 102a, and the first insulating strip 104a being wound around the first metallic shielding strip 103 a.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes a second semiconductive tape 102b, a second metallic shield tape 103b, and a second insulating tape 104b, the second semiconductive tape 102b being wound around the metallic tube 1012 and the second elastomeric seal 1013 of the sealing assembly 101 and the outer semiconductive layer of the cable 113a, the second metallic shield tape 103b being wound around the second semiconductive tape 102b, and the second insulating tape 104b being wound around the second metallic shield tape 103 b.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes a first heat shrinkable tube 109 and a second heat shrinkable tube 106, the first heat shrinkable tube 109 being heat shrunk over the tail tube 108 and the cable 113, and the second heat shrinkable tube 106 being heat shrunk over the second insulating tape 104 b.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal 10 further includes a waterproof sealing tape 105, and the waterproof sealing tape 105 is wound on the first insulating tape 104 a.
As shown in fig. 2, in the illustrated embodiment, the oil-filled cable terminal further includes a copper braid 112 between the metal sheath 111 and the first metal shielding tape 103 a. One ends of the copper braided tape 112 and the first metal shielding tape 103a are tied with copper wire in a first annular groove 1012a (see fig. 1) of a metal tube 1012 of the seal assembly 101, and the other ends are tied with copper wire on the metal sheath 111 of the cable 113. One end and the other end of the copper braided tape 112 and the first metal shielding tape 103a are welded to the metal tube 1012 and the metal sheath 111, respectively, after being tightened.
Note that the present invention is not limited to the foregoing embodiment, and for example, one end and the other end of the copper braid 112 may be pre-welded to the metal tube 1012 of the sealing member 101 and the metal sheath 111 of the cable 113, respectively, before the first metal shield tape 103a is wound. Thus, it is not necessary to fasten both ends of the copper braid 112 with copper wires.
As shown in fig. 2, in the illustrated embodiment, the other end of the second metallic shielding tape 103b is copper wire-bound in a second annular groove 1012b (see fig. 1) of the metallic tube 1012 of the sealing assembly 101. The other end of the second metallic shield tape 103b is welded to the metallic pipe 1012 after being fastened.
As shown in fig. 2, in the illustrated embodiment, the base plate 110 and the tail tube 108 are adapted to be connected to a ground terminal for grounding an oil filled cable termination.
The installation process of the oil-filled cable terminal of the present invention will be described in detail with reference to fig. 1 and 2.
Firstly, the support plate 107, the tail pipe 108 and the heat shrink tube 109 are sleeved on the cable 113;
then, the base plate 110 is mounted to a mounting bracket (not shown);
then, the integrated seal 101 is pushed into the desired position on the cable 113;
the integrated seal assembly 101 is then moved upwardly so that its first resilient seal 1011 is against the base plate 110;
then, sequentially winding a first semi-conductive band 102a, a first metal shielding band 103a, a first insulating band 104a and a waterproof sealing band 105 on the integrated sealing component 101 and the metal sheath 111 of the cable, and respectively binding the copper braided band 112 of the first metal shielding band 103a and the cable 113 with the metal tube 1012 of the integrated sealing component 101 and the metal sheath 111 of the cable 113 by using copper binding wires, and performing welding treatment;
then, the support plate 107 and the tail pipe 108 are fixed to the base plate 110, and the first elastic seal 1011 of the integrated seal assembly 101 is pressed by using the support plate 107 and the tail pipe 108, so that the axial seal between the seal assembly 101 and the base plate 110 is realized;
then, a first heat shrinkable tube 109 is heat shrunk on the tail tube 108 and the cable 113 to perform sealing protection;
then, the second elastic sealing member 1013 at the other end of the integrated sealing assembly 101 is in interference fit with the processed end 113a of the cable 113, that is, the outer diameter of the end 113a of the cable 103 is larger than the inner diameter of the through hole of the second elastic sealing member 1013, so as to realize radial sealing between the sealing assembly 101 and the cable 113;
then, the second semiconductive tape 102b, the second metallic shield tape 103b, and the second insulating tape 104b are wound around the second elastic seal 1013 in this order, and the second metallic shield tape 103b is inserted into the groove of the metal pipe 1012 by using a copper wire and then subjected to a welding process.
Then, a second heat shrinkable tube 106 is heat-shrunk on the second insulating tape 104b for sealing protection;
then, the insulator 114 is fixed to the base plate 110, and an O-ring (not shown) is used to seal between the insulator 114 and the base plate 110;
finally, the grounding of the oil-filled cable terminal is achieved by connecting the grounding terminal to the bottom plate 110 or the tail pipe 108.
Through the steps, not only is the good sealing of the oil-filled cable terminal realized, but also the reliable grounding of the whole oil-filled cable terminal is realized, and the guarantee is provided for the safe operation of the oil-filled cable terminal.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention.
Claims (25)
1. A seal assembly for an oil-filled cable termination, comprising:
a metal tube (1012) for fitting over a cable end (113a) of the cable (113) exposed from the metal sheath (111) of the cable;
a first elastic seal (1011) molded on an outer peripheral surface of the metal tube (1012) for effecting axial sealing of the oil-filled cable terminal (10); and
a second elastomeric seal (1013) molded over the end of the metal tube (1012) for effecting a radial seal of the oil-filled cable termination (10).
2. The seal assembly of an oil-filled cable termination of claim 1, wherein:
the first resilient seal (1011) is adapted to be pressed axially against a base plate (110) for mounting the oil-filled cable terminal (10) so as to effect an axial seal between the oil-filled cable terminal (10) and the base plate (110).
3. The seal assembly of an oil-filled cable termination of claim 2, wherein:
the second elastomeric seal (1013) is in interference fit with a cable (113) extending into the oil-filled cable terminal (10) to effect a radial seal between the oil-filled cable terminal (10) and the cable (113).
4. The seal assembly of an oil-filled cable termination of claim 2, wherein:
the first elastic seal (1011) comprises a base portion (1011a), an edge portion (1011b), and a connecting portion (1011c) connecting the base portion (1011a) and the edge portion (1011 b);
the base (1011a) is directly joined to the outer peripheral surface of the metal pipe (1012), the edge portion (1011b) protrudes in the axial direction toward both sides with respect to the connecting portion (1011c), and the edge portion (1011b) is adapted to be pressed axially against the bottom plate (110) to effect the axial seal.
5. The seal assembly of an oil-filled cable termination of claim 4, wherein:
the edge portions (1011b) project toward both sides in the axial direction by 1 to 5mm with respect to the connecting portion (1011 c).
6. The seal assembly of an oil-filled cable termination of claim 5, wherein:
the edge portion (1011b) protrudes toward both sides in the axial direction by 1mm, 2mm, 3mm, 4mm or 5mm with respect to the connecting portion (1011 c).
7. The seal assembly of an oil-filled cable termination of claim 4, wherein:
the edge portion (1011b) of the first resilient seal (1011) being substantially circular in cross-section;
the base (1011a) of the first resilient seal (1011) is generally trapezoidal in cross-section and tapers radially outwardly;
the cross section of the connecting part (1011c) of the first elastic seal (1011) is substantially rectangular.
8. The seal assembly of an oil-filled cable termination of claim 3, wherein:
the second elastomeric seal (1013) has a through bore (1013a) that allows the processed end (113a) of a cable (113) to pass through, the through bore (1013a) having an inner diameter that is smaller than an outer diameter of the end (113a) of the cable (113) such that the end (113a) of the cable (113) is an interference fit with the through bore (1013a) to effect the radial seal.
9. The oil-filled cable termination seal assembly of claim 8, wherein:
the inner diameter of the through hole (1013a) of the second elastic seal (1013) is 90-96% of the outer diameter of the end (113a) of the cable (113).
10. The oil-filled cable termination seal assembly of claim 8, wherein:
the inner diameter of the metal tube (1012) is larger than the outer diameter of the end (113a) of the cable (113); and is
The clearance between the inner surface of the metal tube (1012) and the outer surface of the end (113a) of the cable (113) is within the range of 5-10 mm.
11. The oil-filled cable termination seal assembly of claim 10, wherein:
the axis of the metal tube (1012) coincides with the axis of the through hole (1013a) of the second elastic seal (1013) to ensure that the end (113a) of the cable (113) passing through the metal tube (1012) and the through hole (1013a) is centrally positioned in the metal tube (1012).
12. The seal assembly of an oil-filled cable termination of claim 1, wherein:
the first and second elastomeric seals (1011, 1013) are made of the same oil resistant elastomeric material or different oil resistant elastomeric materials.
13. The seal assembly of an oil-filled cable termination of claim 1, wherein: the metal tube (1012) is made of a non-magnetic conductive metal material.
14. The oil-filled cable termination seal assembly of claim 13, wherein: the metal tube (1012) is made of copper or aluminum.
15. An oil-filled cable termination, comprising: the seal assembly (101) of any one of claims 1-14.
16. The oil-filled cable termination of claim 15, wherein:
the oil-filled cable terminal (10) further comprises a support plate (107) and a tail pipe (108), the support plate (107) and the tail pipe (108) being sleeved on the cable (113) and adapted to be fixed to one side of a bottom plate (110) for mounting the oil-filled cable terminal (10);
when the support plate (107) and tailpipe (108) are secured to the base plate (110), the support plate (107) compresses a first elastomeric seal (1011) of the seal assembly (101) in a groove of the base plate (110) to effect an axial seal between the oil-filled cable termination (10) and the base plate (110).
17. The oil-filled cable termination of claim 16, wherein:
the oil-filled cable terminal (10) further comprises an insulator (114), wherein the insulator (114) is sleeved on the cable (113) and is suitable for being fixed to the other side of the bottom plate (110), and an O-shaped sealing ring is adopted for sealing between the insulator (114) and the bottom plate (110).
18. The oil-filled cable termination of claim 17, wherein:
the oil-filled cable terminal (10) further comprises a first semi-conductive strip (102a), a first metal shielding strip (103a) and a first insulating strip (104a), wherein the first semi-conductive strip (102a) is wound on a metal pipe (1012) of the sealing assembly (101) and a metal sheath (111) of the cable (113), the first metal shielding strip (103a) is wound on the first semi-conductive strip (102a), and the first insulating strip (104a) is wound on the first metal shielding strip (103 a).
19. The oil-filled cable termination of claim 18, wherein:
the oil-filled cable terminal (10) further comprises a second semiconductive tape (102b), a second metallic shielding tape (103b), and a second insulating tape (104b), the second semiconductive tape (102b) being wound around the metal tube (1012) and the second elastic seal (1013) of the sealing assembly (101) and the outer semiconductive layer of the cable (113a), the second metallic shielding tape (103b) being wound around the second semiconductive tape (102b), the second insulating tape (104b) being wound around the second metallic shielding tape (103 b).
20. The oil-filled cable termination of claim 19, wherein:
the oil-filled cable terminal (10) further comprises a first heat shrinkable tube (109) and a second heat shrinkable tube (106), wherein the first heat shrinkable tube (109) is heat-shrunk on the tail tube (108) and the cable (113), and the second heat shrinkable tube (106) is heat-shrunk on the second insulating tape (104 b).
21. The oil-filled cable termination of claim 18, wherein:
the oil-filled cable terminal (10) further comprises a waterproof sealing tape (105), the waterproof sealing tape (105) being wound around the first insulating tape (104 a).
22. The oil-filled cable termination of claim 19, wherein:
the oil-filled cable terminal further comprises a copper braid (112) between the metal sheath (111) and the first metal shielding tape (103a), one end of the copper braid (112) and the first metal shielding tape (103a) being fastened with copper wire in a first annular groove (1012a) of a metal tube (1012) of the sealing assembly (101), and the other end being fastened with copper wire on the metal sheath (111) of the cable (113);
one end and the other end of the copper braided tape (112) and the first metal shielding tape (103a) are welded to the metal tube (1012) and the metal sheath (111), respectively, after being fastened.
23. The oil-filled cable termination of claim 22, wherein:
the other end of the second metallic shielding tape (103b) is tied up in a second annular groove (1012b) of a metallic tube (1012) of the sealing assembly (101) by a copper wire;
the other end of the second metallic shield band (103b) is welded to the metallic tube (1012) after being fastened.
24. The oil-filled cable termination of claim 19, wherein:
the oil-filled cable terminal further comprises a copper braid (112) between the metal sheath (111) and the first metal shielding tape (103a), the copper braid (112) being welded at one end to a metal tube (1012) of the sealing assembly (101) and at the other end to the metal sheath (111) of the cable (113).
25. The oil-filled cable termination of claim 16, wherein:
the base plate (110) and the tail tube (108) are adapted to be connected to a ground terminal for grounding the oil-filled cable terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996747.5A CN108963954B (en) | 2018-08-29 | 2018-08-29 | Sealing assembly and oil-filled cable terminal |
| PCT/IB2019/056695 WO2020044145A1 (en) | 2018-08-29 | 2019-08-06 | Sealing assembly and oil-filled cable terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996747.5A CN108963954B (en) | 2018-08-29 | 2018-08-29 | Sealing assembly and oil-filled cable terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108963954A CN108963954A (en) | 2018-12-07 |
| CN108963954B true CN108963954B (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810996747.5A Active CN108963954B (en) | 2018-08-29 | 2018-08-29 | Sealing assembly and oil-filled cable terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108963954B (en) |
| WO (1) | WO2020044145A1 (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2238268C3 (en) * | 1972-08-03 | 1980-01-31 | Spinner-Gmbh Elektrotechnische Fabrik, 8000 Muenchen | Fitting for a corrugated tube waveguide |
| NO172416B1 (en) * | 1991-02-11 | 1993-07-14 | Nexans Norway As | Method and connector for connecting two electrical conductors with insulating sheaths |
| EP1865516B1 (en) * | 2006-06-07 | 2013-04-10 | Nexans | System with a superconductive cable |
| GB0617776D0 (en) * | 2006-09-09 | 2006-10-18 | Hubbell Ltd | Cable barrier glands |
| CN101162832A (en) * | 2006-10-13 | 2008-04-16 | 深圳市长园新材料股份有限公司 | GIS terminal of crosslinked electrical cable |
| CN201113373Y (en) * | 2007-03-15 | 2008-09-10 | 武汉华瑞电力科技股份有限公司 | 110kV-220kV cross linkage cable filling open air terminal |
| US7635813B2 (en) * | 2007-09-10 | 2009-12-22 | 3M Innovative Properties Company | Article and method for sealing fluid-containing cables |
| US7960652B2 (en) * | 2008-10-02 | 2011-06-14 | Delphi Technologies, Inc. | Sealed cable and terminal crimp |
| KR101598223B1 (en) * | 2009-02-11 | 2016-02-29 | 엘에스전선 주식회사 | Connecting Structure of Terminal for Super Conductor Cable |
| CN202906422U (en) * | 2012-11-05 | 2013-04-24 | 广东吉熙安电缆附件有限公司 | Novel oil-filled cable terminal |
| US9871363B1 (en) * | 2017-03-16 | 2018-01-16 | Te Connectivity Corporation | Seal systems for oil-filled cable terminations and assemblies and methods including the same |
| CN207559518U (en) * | 2017-11-15 | 2018-06-29 | 常州安凯特电力器件有限公司 | Environment-protection type outdoor terminal cable sealing structure |
-
2018
- 2018-08-29 CN CN201810996747.5A patent/CN108963954B/en active Active
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2019
- 2019-08-06 WO PCT/IB2019/056695 patent/WO2020044145A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN108963954A (en) | 2018-12-07 |
| WO2020044145A1 (en) | 2020-03-05 |
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