CN216146075U - 10-35kV welding type cross-linked cable terminal - Google Patents

10-35kV welding type cross-linked cable terminal Download PDF

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Publication number
CN216146075U
CN216146075U CN202121944032.9U CN202121944032U CN216146075U CN 216146075 U CN216146075 U CN 216146075U CN 202121944032 U CN202121944032 U CN 202121944032U CN 216146075 U CN216146075 U CN 216146075U
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cable
layer
terminal
insulating layer
stress cone
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CN202121944032.9U
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吕殿泉
罗继宏
唐小平
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Ruibang Power Technology Co ltd
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Ruibang Power Technology Co ltd
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Abstract

The utility model discloses a 10-35kV welding type cross-linked cable terminal, which comprises at least one phase core terminal, an additional insulating layer, a stress cone, a metal shielding layer and an umbrella skirt, wherein the phase core terminal extends from a cable body, the additional insulating layer surrounds a cable insulating layer and is welded with the cable insulating layer, the lower end of the stress cone is embedded in the additional insulating layer and hoops the upper end of an outer semi-conducting layer of the cable, the upper end of the metal shielding layer is lower than the lower end of the stress cone, the metal shielding layer is connected with a grounding wire, and the additional insulating layer is positioned in the umbrella skirt. The added insulating layer is grown on the cable insulating layer, although the voltage to earth is generated between the cable conductor and the metal shielding layer during working, the stress cone homogenizes and disperses the electric field stress, and the work of the cross-linked cable terminal is effectively guaranteed.

Description

10-35kV welding type cross-linked cable terminal
Technical Field
The utility model relates to a high-voltage cable, in particular to a 10-35kV welding type cross-linked cable terminal.
Background
10kV-35kV crosslinked power cables are widely applied to power transmission and distribution. The common 10kV-35kV cross-linked power cable is three-core; referring to fig. 3a, each core has a cable conductor, a cable inner semiconductive layer, a cable insulation layer, a cable outer semiconductive layer, and a metal shield in this order from inside to outside along a radial direction thereof. The ends of the crosslinked cable are used to connect overhead lines or power transformation equipment, etc.
In order to ensure long-term normal use of power transmission, the structural design of the 10kV-35kV crosslinked cable terminal is also very important, and a better structure is needed to control the electrical stress.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a 10-35kV welding type cross-linked cable terminal which can accurately control the electrical stress.
According to the embodiment of the first aspect of the utility model, the 10-35kV welded cross-linked cable terminal comprises a cable body and at least one phase core terminal extending from the cable body, wherein the phase core terminal sequentially comprises a cable conductor, a cable inner semi-conducting layer, a cable insulating layer, a cable outer semi-conducting layer and a metal shielding layer from inside to outside, the upper ends of the cable conductor, the cable insulating layer and the cable outer semi-conducting layer are distributed according to a stepped structure, the phase core terminal further comprises an additional insulating layer, a stress cone and an umbrella skirt, the additional insulating layer surrounds the cable insulating layer and is welded with the cable insulating layer, the stress cone is embedded in the additional insulating layer, the stress cone is in an inverted cone shape, the lower end of the stress cone hoops the upper end of the cable outer semi-conducting layer, and the upper end of the metal shielding layer is lower than the lower end of the stress cone, the metal shielding layer is connected with a grounding wire, and the additional insulating layer is positioned in the umbrella skirt.
The 10-35kV welded cross-linked cable terminal provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects: the added insulating layer is long on the cable insulating layer, and the added insulating layer is not easy to separate due to working conditions such as temperature, humidity, load and the like due to a welded structural mode; although there is earth voltage between the cable conductor and the metal shielding layer during working, the stress cone homogenizes and disperses the electric field stress, and the work of the cross-linked cable terminal is effectively guaranteed, so the cable terminal structure of the utility model is simple and reliable, the stress cone homogenizes and disperses the electric stress, the electric stress is accurately controlled, the accident rate is low, the cable terminal structure of the utility model is simple, the preparation work is easy, and the cost is low; the upper end of the umbrella skirt is used as a rain cover, so that the outer semi-conducting layer of the cable, the insulating layer of the cable, the added insulation and all connecting parts of the cable conductor are effectively prevented from being polluted by water stains.
According to some embodiments of the utility model, the additional insulating layer is in the shape of a date pit, and the stress cone is embedded in a lower cone portion of the date pit.
According to some embodiments of the utility model, the cable further comprises a wire connecting terminal which clasps and/or welds an end of the cable conductor.
According to some embodiments of the utility model, the outer peripheral wall of the cable insulating layer and the outer peripheral wall of the additional insulating layer are coated with a silicone oil layer.
According to some embodiments of the utility model, the upper end of the stress cone is curved with a convex portion extending in a direction deviating from the axis of the cable conductor.
According to some embodiments of the utility model, further comprising phase bands, the phase bands of different phase core terminations having different colors.
According to some embodiments of the utility model, the cable further comprises three finger sleeves, and the three finger sleeves are used for sleeving transition positions of the cable body and the phase core terminal.
According to some embodiments of the utility model, the umbrella further comprises a sealed long pipe, the sealed long pipe is used for being sleeved at the lower end of the phase core terminal, the lower end of the sealed long pipe is sleeved at the finger stall part of the three finger cot, and the lower end of the umbrella skirt is sleeved at the upper end of the sealed long pipe.
According to some embodiments of the utility model, the waterproof protective umbrella further comprises a waterproof sealant and a terminal sealing tube, the upper end of the cable insulating layer protrudes out of the umbrella skirt, a gap between the upper end of the cable insulating layer and the wiring terminal is filled and covered by the waterproof sealant, the gap is located in the terminal sealing tube, and the terminal sealing tube is further sleeved on the upper end of the umbrella skirt.
According to some embodiments of the utility model, an insulating tape tightening layer is further wound on the outer peripheral wall of the terminal sealing tube, and the insulating tape tightening layer corresponds to the waterproof sealant in position.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a cross-linked cable termination according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the phase core termination shown in FIG. 1, also in a state diagram seven of the manufacturing process;
FIG. 3a is a first state diagram of a process for preparing a crosslinked cable termination;
FIG. 3b is a state diagram of a second cross-linked cable termination manufacturing process;
FIG. 3c is a state diagram III in the process of preparing a crosslinked cable termination;
FIG. 3d is a state diagram of a cross-linked cable termination manufacturing process;
FIG. 3e is a state diagram of a cross-linked cable termination manufacturing process;
fig. 3f is a state diagram six in the process of preparing a crosslinked cable termination.
In order to ensure the clarity of the attached drawings, hatching is not arranged on the umbrella skirt, the sealed long pipe, the outer semi-conducting layer of the cable and the inner semi-conducting layer of the cable.
A cable body 100;
a cable outer semiconductive layer 210, a cable insulation layer 220, a cable inner semiconductive layer 230, a cable conductor 240, a metal shield layer 250;
stress cone 310, convex part 311, additional insulating layer 320;
the waterproof sealing glue comprises a wiring terminal 410, a waterproof sealing glue 420, a terminal sealing tube 430, a shed 440, a sealing long tube 450 and three finger sleeves 460;
shielded ground 510 and sheathed ground 520.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If any, the description to the first and second is only for the purpose of distinguishing technical features, and is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
A crosslinked cable includes a jacket, an armor housed in the jacket, and one or more phase cores, typically three cores, housed in the armor. Referring to fig. 1 and 2, a 10-35kV welded cross-linked cable terminal according to an embodiment of the first aspect of the utility model includes a cable body 100 and at least one phase core terminal extending from the cable body 100, where the phase core terminal includes a cable conductor 240, a cable insulation layer 220, a cable outer semi-conductive layer 210 and a metal shielding layer 250 in sequence from inside to outside, and upper ends of the cable conductor 240, the cable insulation layer 220 and the cable outer semi-conductive layer 210 are distributed according to a stepped structure.
The phase core terminal further comprises an additional insulating layer 320, a stress cone 310 and an umbrella skirt 440, wherein the additional insulating layer 320 surrounds the cable insulating layer 220, the additional insulating layer 320 is welded with the cable insulating layer 220, the stress cone 310 is embedded in the additional insulating layer 320, the stress cone 310 is in an inverted cone shape, the lower end of the stress cone 310 hoops the upper end of the cable outer semi-conducting layer 210, the upper end of the metal shielding layer 250 is lower than the lower end of the stress cone 310, the metal shielding layer 250 is connected with a shielding grounding wire 510, and the additional insulating layer 320 is located in the umbrella skirt 440.
Referring to fig. 1 and 2, the phase core terminal extends from bottom to top, also in the axial direction. After stripping treatment, the cable insulation layer 220 extends out of the cable outer semi-conductive layer 210, the cable conductor 240 extends out of the cable insulation layer 220, and the cable outer semi-conductive layer 210, the cable insulation layer 220 and the cable conductor 240 are distributed in a step shape
The welding is a conventional process, and the formed structure means that after the insulating tape is added to the outer peripheral wall of the cable insulating layer 220, the insulating tape and the cable insulating layer 220 are heated together, so that the insulating tape and the cable insulating layer 220 are welded and connected, and the obtained additional insulating layer 320 is long on the cable insulating layer 220.
The stress cone 310 and the cable outer semiconductive layer 210 are of the same material, both being semiconductive materials, and the lower end of the stress cone 310 embraces the upper end of the cable outer semiconductive layer 210, so the stress cone 310 connects the cable outer semiconductive layer 210. Referring to fig. 1, 2, 3f, 3e, 3d, and 3c, the lower portion of the additional insulating layer 320 is fitted to the stress cone 310, and the lower portion of the additional insulating layer 320 is in an inverted cone shape.
In the field of crosslinked cable terminations, it is conventional practice to provide a shed 440 with a plurality of umbrella-like flanges axially aligned on the shed 440.
The preparation process of the 10-35kV welding type cross-linked cable terminal comprises a wire stripping step, a tape winding step, a welding step and an umbrella skirt sleeving step.
Referring to fig. 3a and 3b, the sheath, the armor, the metal shielding layer 250, the cable outer semi-conducting layer 210, the cable insulating layer 220 and the cable inner semi-conducting layer 230 are sequentially stripped, in the phase core terminal, the cable insulating layer 220 extends out of the cable outer semi-conducting layer 210, the cable conductor 240 extends out of the cable insulating layer 220, and the cable outer semi-conducting layer 210, the cable insulating layer 220, the cable conductor 240 and the metal shielding layer 250 are distributed in a step shape.
The change in the outcome of the wrapping and welding is illustrated in fig. 3b and 3 c.
And (3) winding the insulating tape and the semi-conductive tape on the outer peripheral wall of the cable insulating layer 220, wherein the wound semi-conductive tape layer is in an inverted cone shape, the lower end of the semi-conductive tape layer is hooped at the upper end of the cable outer semi-conductive layer 210, and the wound insulating tape buries the semi-conductive tape layer.
Welding, heating the insulating tape, the semi-conductive tape layer and the cable insulating layer 220, winding the obtained insulating tape to form an additional insulating layer 320, welding the additional insulating layer 320 and the cable insulating layer 220, forming the semi-conductive tape layer into a stress cone 310, embedding the stress cone 310 in the additional insulating layer 320, enabling the upper end of the metal shielding layer 250 to be lower than the lower end of the stress cone 310,
referring to fig. 3d and 3e, the umbrella skirt 440 is covered from top to bottom, such that the additional insulating layer 320 is located inside the umbrella skirt 440.
The 10-35kV welded cross-linked cable terminal provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects: the additional insulation layer 320 is long on the cable insulation layer 220, and the welding structure makes the additional insulation layer 320 not easy to separate due to working conditions such as temperature, humidity and load; although there is voltage to earth between the cable conductor 240 and the metal shielding layer 250 during operation, the stress cone 310 homogenizes and disperses the electric field stress, which effectively ensures the operation of the cross-linked cable terminal, so the cable terminal of the utility model has simple and reliable structure, the stress cone 310 homogenizes and disperses the electric stress, the electric stress is accurately controlled, the accident rate is low, the cable terminal of the utility model has simple structure, easy preparation and low cost; the upper end of the umbrella skirt 440 is used as a rain shield, which effectively prevents the joints of the outer semi-conducting layer 210 of the cable, the insulating layer 220 of the cable, the additional insulation and the cable conductor 240 from being polluted by water.
Referring to fig. 1, in some embodiments of the utility model, the armor is connected to an armor ground 520.
In some embodiments of the present invention, the additional insulating layer 320 is a cross-linked polyethylene-based material, and the additional insulating layer 320 has a small electronegativity.
In some embodiments of the present invention, the umbrella skirt 440 is made of a rubber material, the umbrella skirt 440 can elastically deform to a certain extent, the work of sleeving the umbrella skirt 440 is easy, the sleeved umbrella skirt 440 will be tightened, the umbrella skirt 440 can eliminate a connecting seam to a certain extent, and the cable terminal is effectively prevented from entering dust and scale; the shed 440 is made of a rubber material and the cable termination is also relatively lightweight.
In some embodiments of the present invention, the insulating tape is further formed with a transition structure, i.e., the additive insulating layer 320 further comprises a transition structure. Specifically, the lower part of the additional insulating layer 320 is mainly used for packaging the stress cone 310, the upper part of the additional insulating layer 320 is of a transition structure, the additional insulating layer 320 is in a date-pit shape, the transition structure is in a cone shape, and the stress cone 310 is embedded in the date-pit-shaped lower cone part.
Referring to fig. 1, 2 and 3f, in some embodiments of the utility model, a wire terminal 410 is further included, the wire terminal 410 being connected to an end of the cable conductor 240. The connection terminal 410 is used to solve the problem of convenience in connecting the phase core terminal to an overhead line or the like.
Referring to fig. 1, in some embodiments of the present invention, before the step of covering the umbrella skirt, three finger sleeves 460 are covered on the cross-linked cable terminal, the three finger sleeves 460 are heat-shrunk, and the three finger sleeves 460 are used for sleeving the transition positions of the cable body 100 and the phase core terminal. The three-finger sleeve 460 also hoops the shielding ground wire 510 and the armored ground wire 520, so that the shielding ground wire 510 and the armored ground wire 520 are fixed.
Referring to fig. 1, in some embodiments of the present invention, before the step of covering the umbrella skirt, a sealed long tube 450 is covered on the lower end of the core, the sealed long tube 450 is heat-shrunk, and the lower end of the sealed long tube 450 is sleeved on the finger sleeve part of the three-finger sleeve 460; in the step of covering the umbrella skirt, the lower end of the umbrella skirt 440 is sleeved with the upper end of the sealed long tube 450.
The manufacturing process also includes a terminal installation step, where the wire terminals 410 grip and/or weld the ends of the cable conductors 240. One end of the wire terminal 410 may be a sleeve with a split/opening, and after the cable conductor 240 is inserted into the wire terminal 410, the wire terminal 410 grips the cable conductor 240; after the terminal 410 clamps the cable conductor 240, the connection seam may be welded.
Referring to fig. 1 and 2, in some embodiments of the present invention, after the step of covering the umbrella skirt, the upper end of the cable insulation layer 220 protrudes out of the umbrella skirt 440, and a gap between the upper end of the cable insulation layer 220 and the connection terminal 410 is filled and covered with the waterproof sealant 420; before the waterproof sealant 420 is dried, the terminal sealing tube 430 is sleeved, a gap is formed in the terminal sealing tube 430, the terminal sealing tube 430 is subjected to heat shrinkage, and the terminal sealing tube 430 is further sleeved on the upper end of the umbrella skirt 440.
In some embodiments of the present invention, after the terminal sealing tube 430 is sleeved, an insulating tape tightening layer is wound around the outer circumferential wall of the terminal sealing tube 430, and the insulating tape tightening layer corresponds to the waterproof sealant 420.
In some embodiments of the present invention, the outer peripheral wall of the cable insulation layer 220 and the outer peripheral wall of the additional insulation layer 320 are coated with a silicone oil layer before the step of covering the umbrella skirt. The work of the umbrella skirt 440 sleeving the cable insulation layer 220 is relatively easy, and the silicon oil layer forms an insulation dense layer on the outer peripheral wall of the cable insulation layer 220. After the umbrella skirt 440 is sleeved on the silicon oil layer, the umbrella skirt 440 is tightened, and the umbrella skirt 440 effectively eliminates a connecting seam.
Referring to fig. 1, 2, 3f, 3e, 3d, 3c, in some embodiments of the utility model, the upper end of the stress cone 310 is curved with a convex portion 311 extending in a direction deviating from the axis of the cable conductor 240. In the tape winding step, the upper end of the semiconductive tape layer is bent and extended with a convex portion 311 in a direction deviating from the axis of the cable conductor 240.
In some embodiments of the present invention, in the wire stripping step, a phase color ribbon is wound around the extension of the cable insulation 220 and/or the extension of the cable conductor 240; and/or in the welding step, the phase color tape is wound on the additional insulating layer 320; and/or the skirt step, a phase color band is wound around the skirt 440. Therefore, one or more of the cable outer semiconductive layer 210, the extension of the cable insulation layer 220, the extension of the cable conductor 240, the additional insulation layer 220, and the shed 440 are surrounded by phase bands, the phase bands of different phase core terminations having different colors.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. The utility model provides a 10-35kV welded cross-linking cable terminal, characterized in that, include cable body (100) and follow at least one looks core terminal that cable body (100) extended, looks core terminal is by inside to outside including cable conductor (240), cable inner semi-conductive layer (230), cable insulating layer (220), cable outer semi-conductive layer (210) and metallic shield layer (250) in proper order, cable conductor (240), cable insulating layer (220) and the upper end of cable outer semi-conductive layer (210) three distributes according to the ladder structure, looks core terminal still includes:
an additional insulation layer (320) surrounding the cable insulation layer (220), and the additional insulation layer (320) is fused with the cable insulation layer (220);
the stress cone (310) is embedded in the additional insulating layer (320), the stress cone (310) is in an inverted cone shape, the lower end of the stress cone (310) hoops the upper end of the cable outer semi-conducting layer (210), the upper end of the metal shielding layer (250) is lower than the lower end of the stress cone (310), and the metal shielding layer (250) is connected with a grounding wire;
a shed (440), the additional insulating layer (320) being located within the shed (440).
2. The 10-35kV fused crosslinked cable termination of claim 1, wherein the additional insulating layer (320) is date-core shaped, and the stress cone (310) is embedded in a lower cone portion of the date-core shape.
3. The 10-35kV fused crosslinked cable termination according to claim 1, further comprising a wire terminal (410), wherein the wire terminal (410) grips and/or welds the end of the cable conductor (240).
4. The 10-35kV fused crosslinked cable termination of claim 1, wherein the peripheral wall of the cable insulation layer (220) and the peripheral wall of the additional insulation layer (320) are coated with a layer of silicone oil.
5. The 10-35kV fused crosslinked cable termination according to any one of claims 1 to 4, wherein the upper end of the stress cone (310) is curved with a convex portion (311) extending in a direction deviating from the axis of the cable conductor (240).
6. The 10-35kV fused crosslinked cable termination of any one of claims 1 to 4, further comprising phase bands, the phase bands of different phase core terminations having different colors.
7. The 10-35kV welded cross-linked cable terminal according to any one of claims 1 to 4, further comprising three finger sleeves (460), wherein the phase core terminal comprises three finger sleeves, and the three finger sleeves (460) are used for sleeving transition positions of the cable body (100) and the phase core terminal.
8. The 10-35kV welded cross-linked cable terminal according to claim 7, further comprising a sealed long tube (450), wherein the sealed long tube (450) is used for sleeving the lower end of the phase core terminal, the lower end of the sealed long tube (450) is sleeved with the finger sleeve part of the three-finger sleeve (460), and the lower end of the umbrella skirt (440) is sleeved with the upper end of the sealed long tube (450).
9. The 10-35kV welded cross-linked cable terminal as claimed in claim 3, further comprising a waterproof sealant (420) and a terminal sealing tube (430), wherein the upper end of the cable insulation layer (220) protrudes out of the umbrella skirt (440), a gap between the upper end of the cable insulation layer (220) and the connection terminal (410) is filled and covered by the waterproof sealant (420), the gap is located in the terminal sealing tube (430), and the terminal sealing tube (430) is further sleeved on the upper end of the umbrella skirt (440).
10. The 10-35kV fused crosslinked cable terminal according to claim 9, wherein an insulating tape tightening layer is further wound on the outer peripheral wall of the terminal sealing tube (430), and the insulating tape tightening layer corresponds to the position of the waterproof sealant (420).
CN202121944032.9U 2021-08-18 2021-08-18 10-35kV welding type cross-linked cable terminal Active CN216146075U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121944032.9U CN216146075U (en) 2021-08-18 2021-08-18 10-35kV welding type cross-linked cable terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121944032.9U CN216146075U (en) 2021-08-18 2021-08-18 10-35kV welding type cross-linked cable terminal

Publications (1)

Publication Number Publication Date
CN216146075U true CN216146075U (en) 2022-03-29

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Application Number Title Priority Date Filing Date
CN202121944032.9U Active CN216146075U (en) 2021-08-18 2021-08-18 10-35kV welding type cross-linked cable terminal

Country Status (1)

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CN (1) CN216146075U (en)

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