CN210780045U - 66kV combined type cable terminal - Google Patents
66kV combined type cable terminal Download PDFInfo
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- CN210780045U CN210780045U CN201921287815.7U CN201921287815U CN210780045U CN 210780045 U CN210780045 U CN 210780045U CN 201921287815 U CN201921287815 U CN 201921287815U CN 210780045 U CN210780045 U CN 210780045U
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Abstract
The utility model discloses a 66kV combined type cable termination, its characterized in that, this cable termination goes up to include down in proper order: the conductor draws forth excellent (1), upper portion gold utensil (3), inboard stress cone (5) of compound sleeve pipe (4) and compound sleeve pipe (4), mounting flange (6), cable protection pipe (7), wherein, the conductor draws forth excellent (1) and is connected with upper portion gold utensil (3), draw forth excellent (1) lower part at the conductor and be provided with the crimping terminal in order to be connected with cable (9), the upper end and the upper portion gold utensil (3) of compound sleeve pipe (4) are connected, the lower extreme is connected with mounting flange (6), be provided with flange (61) on mounting flange (6), the lower extreme is provided with cable protection pipe (7). The utility model discloses a 66kV cable termination has a plurality of advantages such as simple structure, the size is little, light in weight, installation and dismantlement convenience, stress cone long-term operation is difficult for elastic deformation.
Description
Technical Field
The utility model relates to a high-tension transmission system's cable accessories, especially a 66kV combined type cable terminal belongs to the electric power field.
Background
The 66kV composite cable terminal is a cable terminal in the power transmission process of a national power grid and is an indispensable component in a power system.
At present, general 110kV and 220kV cable accessory equipment in the power industry is relatively perfect, but due to the regional characteristics of 66kV lines, the demand of cable terminals is not large, so that most manufacturers adopt 110kV products for substitution, although the creepage ratio distance can be met, the height of the 110kV products is the same as that of the 110kV products, the 110kV cable accessory equipment is not suitable for installation in a limited small space position, and the material consumption and the manufacturing cost of the products are increased.
Therefore, the prior art needs to research and design a 66kV cable terminal which is small in size, light in weight and convenient to install and fix.
In addition, the existing 66kV terminal has the defects that the stress cone is easy to deform after being used for a long time, the whole sealing performance is poor, the service life is short, the maintenance cost is high and the like.
For the above reasons, the present inventors have conducted intensive studies on the existing cable terminal in order to design a 66kV cable terminal capable of solving the above problems.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above problems, the present inventors have conducted intensive studies to design a 66kV cable terminal,
the cable termination comprises the following components in sequence from top to bottom: a conductor leading-out bar 1, an upper hardware fitting 3, a composite sleeve 4, a stress cone 5 at the inner side of the composite sleeve 4, a mounting flange 6 and a cable protection tube 7,
the conductor leading-out rod 1 is connected with the upper hardware fitting 3, and a crimping terminal is arranged at the lower part of the conductor leading-out rod 1 to be connected with a cable 9;
the upper end of the composite sleeve 4 is connected with the upper hardware fitting 3, and the lower end of the composite sleeve 4 is connected with the mounting flange 6;
the mounting flange 6 is provided with a through hole, and the cable protection tube 7 is connected with the through hole of the mounting flange 6, so that the cable 9 extends into the inner side of the composite sleeve 4 through the protection tube 7 and is connected with a crimping terminal at the lower end of the conductor bar 1;
the stress cone 5 is sleeved on the cable 9.
As shown in fig. 1, the conductor leading-out bar 1 is columnar, the upper hardware fitting 3 is truncated cone-shaped and has a through hole, the upper end of the conductor leading-out bar is also provided with a pressing hardware fitting 32, and the conductor leading-out bar 1 passes through the through hole of the upper hardware fitting 3 and is fixed with the upper hardware fitting 3 through a conductor fixing hardware fitting 11 arranged in the middle of the conductor leading-out bar 1;
further, a shielding cover 2 is arranged above the upper hardware fitting 3, and the shielding cover 2 is provided with a through hole, so that the upper part of the conductor leading-out rod 1 penetrates through the shielding cover 2;
the composite sleeve 4 is tubular, preferably coaxial with the upper hardware fitting 3, the outer surface of the composite sleeve is of an umbrella skirt laminated structure, the inner side of the composite sleeve is provided with a stress cone 5, and insulating filling liquid is filled between the pipe wall and the stress cone 5;
the upper end of the mounting flange 6 is provided with a supporting flange 61, the shape of the supporting flange 61 corresponds to the shape of the lower end of the stress cone 5 so as to support the stress cone 5, and further, the supporting flange 61 and the stress cone 5 are fixed with a hose clamp 63 by using a connecting copper strip 62;
the mounting flange 6 is in a round table shape, preferably coaxial with the composite sleeve 4, and a supporting insulator 8 is further fixed on the outer edge of the circumference of the lower end of the mounting flange 6;
the lower end of the through hole of the mounting flange 6 is also provided with a cable protection pipe 7, the cable protection pipe 7 is connected with the mounting flange 6 and wraps part of the cable 9,
further, cable protection pipe 7 lower extreme has lead sealing with cable 9 contact position, and boundary belt 91 twines in the cable protection pipe 7, lead sealing, the cable 9 outside, thereby accomplish the utility model discloses.
The utility model provides a 66kV cable termination has following beneficial effect:
(1) the structure is simple, the size is small, and the installation and the disassembly are convenient;
(2) the composite pipe has good ageing resistance and pollution resistance;
(3) the stress cone is supported by the supporting flange, and the stress cone and the supporting flange are fixed by the hose and the copper strip, so that elastic deformation generated by long-term operation of the stress cone is effectively inhibited.
Drawings
Fig. 1 shows a schematic view of a 66kV cable termination according to a preferred embodiment of the present invention;
fig. 2 is a schematic view showing a structure of a hose clamp according to a preferred embodiment of the present invention.
The reference numbers illustrate:
1-a conductor lead-out tube;
11-conductor fixing hardware;
2-a shielding case;
3-upper hardware fitting;
31-pressing hardware fittings;
4-composite casing;
5-stress cone;
6-mounting a flange;
61-a support flange;
62-connecting a copper strip;
63-hose clamps;
631-a fastening mechanism;
7-cable protection tube;
8-a support insulator;
9-a cable;
91-protective band.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the utility model provides a 66kV cable termination, as shown in FIG. 1, this cable termination from the top down includes in proper order: a conductor leading-out bar 1, an upper hardware fitting 3, a composite sleeve 4, a stress cone 5 at the inner side of the composite sleeve 4 and an installation flange 6,
the conductor leading-out rod 1 is connected with the upper hardware fitting 3, and a crimping terminal is arranged at the lower part of the conductor leading-out rod 1 to be connected with a cable 9;
the upper end of the composite sleeve 4 is connected with the upper hardware fitting 3, and the lower end of the composite sleeve 4 is connected with the mounting flange 6;
the mounting flange 6 is provided with a through hole, and the cable protection tube 7 is connected with the through hole of the mounting flange 6, so that the cable 9 extends into the inner side of the composite sleeve 4 through the protection tube 7 and is connected with a crimping terminal at the lower end of the conductor bar 1;
the stress cone 5 is sleeved on the cable 9.
As shown in fig. 1, the conductor leading-out bar 1 is columnar, the middle part is provided with a conductor fixing hardware fitting 11, the upper hardware fitting 3 is truncated cone-shaped and is provided with a through hole, the conductor leading-out bar 1 passes through the through hole of the upper hardware fitting 3, so that the lower end of the conductor leading-out bar 1 is positioned below the upper hardware fitting 3, the conductor fixing hardware fitting 11 is positioned above the upper hardware fitting 3,
in a preferred embodiment, the through hole is located at the axis of the upper hardware fitting 3, the upper surface of the upper hardware fitting 3 is further provided with a counter bore, and the counter bore is located at a position corresponding to the conductor fixing hardware fitting 11, so that the conductor leading-out rod 1 and the upper hardware fitting 3 can be fixed through a bolt;
3 upper ends of upper portion gold utensil still are provided with and compress tightly gold utensil 31 set up the sealing washer that the size matches on the gold utensil 3 of upper portion, the stick 1 contact is drawn out with the conductor to the one side of sealing washer, compresses tightly gold utensil 31 through the fastening for upper portion gold utensil 3 is sealed with 1 contact position of conductor stick, further improves the waterproof sealing nature on terminal upper portion.
The upper hardware fitting 3 is also provided with a shielding cover 2 above to adjust the electric field distribution, the shielding cover 2 is provided with a through hole, so that the upper part of the conductor leading-out rod 1 passes through the shielding cover 2,
further, a sealing ring is arranged on the edge of the through hole of the shielding case 2, so that the contact position of the shielding case 2 and the conductor leading-out rod 1 is sealed; the lower extreme of shield cover 2 and the outer edge of upper portion gold utensil 3 closely laminate for shield cover 2 and upper portion gold utensil 3 form airtight space, can draw forth the hookup location of stick 1 and upper portion gold utensil 3 to the conductor and protect, can adjust electric field distribution again.
The composite sleeve 4 is tubular and coaxial with the upper hardware fitting 3, an upper connecting seat is arranged outside the upper end of the composite sleeve and is fixedly attached to the lower surface of the upper hardware fitting 3, a lower connecting seat is arranged outside the lower end of the composite sleeve and is fixedly attached to the upper surface of the mounting flange 66,
furthermore, the upper connecting seat and the lower connecting seat of the composite sleeve 4 are provided with sealing rings and corresponding sealing ring seat holes, so that the contact surfaces of the composite sleeve 4 and the upper hardware fitting 3 and the contact surfaces of the mounting flange 6 are sealed;
the outer surface of the composite sleeve 4 is of an umbrella skirt laminated structure, furthermore, the composite sleeve 4 is an umbrella skirt laminated composite prefabricated member with an epoxy glass fiber reinforced plastic straight pipe coated with silicon rubber,
the inventor discovers that the compound pipe of adoption epoxy glass steel straight tube outer covering silicon rubber formula can increase the full skirt creep distance, shortens the whole length at cable termination, the utility model discloses in, compound sleeve pipe 4 length is between 700mm ~ 1300mm, preferred 1000mm, and the full skirt creep distance is not less than 2000mm, preferably is not less than 2500 mm.
Insulating filling liquid is filled between the stress cone 5 and the composite sleeve 4, the inner side of the composite sleeve 4 is not in contact with the stress cone 5, the inner side of the composite sleeve 4 is filled with the insulating filling liquid, so that the stress cone 5 and the cable 9 are completely soaked in the insulating filling liquid,
the insulating filling fluid is preferably a high temperature resistant insulating filling fluid,
insulating filling liquid is filled between the composite sleeve 4 and the stress cone 5, and the composite sleeve 4 and the stress cone 5 are isolated by gas, so that the dielectric property of the terminal is improved, and the heat dissipation capacity of the terminal is improved;
more preferably, the insulating filler material is polyisobutylene,
polyisobutylene is filled between the composite sleeve 4 and the stress cone 5, so that the cable terminal not only has excellent high-temperature resistance, but also has excellent air tightness, the aging resistance of rubber at high temperature can be improved, the service life of the stress cone 5 is prolonged, the maintenance frequency of the cable terminal is reduced, and the stability of the cable terminal is improved. Furthermore, the stress cone 5 is formed by adopting imported ethylene propylene diene monomer rubber through high-pressure injection molding.
The mounting flange 6 is provided with a supporting flange 61, the shape of the supporting flange 61 corresponds to the shape of the lower end of the stress cone 5 to support the stress cone 5,
further, the supporting flange 61 and the stress cone 5 are fixed by a hose clamp 63, as shown in fig. 2, the hose clamp 63 is of a band-shaped annular structure and has an opening, the annular inner side of the hose clamp 63 is tightly attached to the outer side of the stress cone 5 and is on the same plane with the upper end of the supporting flange 6, so that the stress cone 5 is tightly attached to the supporting flange 6 when the hose clamp 63 is tightened, and a fastening mechanism 631 is provided at the opening of the hose clamp 63, so that the hose clamp 63 can be radially contracted and tightened in an annular manner, and the stress cone 5 is fastened with the supporting flange 6.
Furthermore, a connecting copper strip 62 is arranged between the supporting flange 61 and the stress cone 5, and the connecting copper strip 62 is wound on the outer side of the stress cone 5 to play a role in grounding.
Further, two of the hose clamps 63 are made of conductive material to ensure that leakage current is uniformly eliminated.
The mode of fixing the support flange 61 and the stress cone 5 by the hose clamp 63 overcomes the defects of elastic relaxation of the stress cone caused by material aging, poor contact between the stress cone and the outer semi-conductive layer of the cable and the like,
in a preferred embodiment, the supporting flange 61 is fixedly connected with the lower surface of the mounting flange by bolts, as shown in fig. 1, a sealing ring is further provided at the connecting position of the supporting flange 61 and the mounting flange 6, so that the supporting flange 61 and the mounting flange 6 are sealed.
The mounting flange 6 is in a truncated cone shape, is preferably coaxial with the composite sleeve 4, and is further fixed with a supporting insulator 8 at the outer edge of the circumference of the lower end as shown in figure 1,
the mounting flange 6 is provided with a through hole, so that a cable 9 can pass through the through hole to enter the inner side of the composite sleeve 4 and be connected with a crimping terminal of the conductor leading-out rod 1, and the position of the through hole is preferably at the axle center of the mounting flange 6;
the stress cone 5 and the cable 9 are in interference fit, the stress cone is easy to crack when the interference magnitude is large, the stress cone will deform and relax when the interference magnitude is too small, and the proper interference magnitude can ensure the insulating property and improve the waterproof property,
in the utility model, the centripetal interference magnitude of the inner diameter of the stress cone 5 is 2-15 mm, preferably 4-10 mm.
As shown in fig. 1, the cable protection tube 7 is connected to the lower end of the through hole of the mounting flange 6 and covers a portion of the cable 9, the lower end of the cable protection tube 7 has a lead seal at a position where it contacts the cable 9, a protective tape 91 is wound around the cable protection tube 7, the lead seal, and the outside of the cable 9 to protect the cable 9,
in a preferred embodiment, the inner diameter of the lower end of the cable protection tube 7 is narrowed, to better seal the cable protection tube from its contact with the cable,
the narrowing of the inner diameter of the lower end of the cable protection pipe 7 can not only reduce the amount of lead sealing in the lead sealing process, but also improve the air tightness and pressure resistance of the lead sealing position and prolong the service life of the cable terminal.
Preferably, the lead seal is sealed into an apple shape, so that the sealing performance between the cable protection tube 7 and the cable is better.
The utility model provides a 66kV cable termination can install according to following step:
step 1: stripping and cutting the cable 9, and then passing through the cable protection pipe 7 and the support flange 6;
and 10, sealing the contact position of the lower end of the cable protection pipe 7 and the cable 9 into an apple shape, and winding by using a protection belt 91.
Example 1
The utility model discloses the equipment process is explained in detail to insulating layer external diameter phi 66 mm's cable below:
step 1: stripping and cutting the cable 9, and then passing through the cable protection pipe 7 and the support flange 6;
and 10, sealing the contact position of the lower end of the cable protection pipe 7 and the cable 9 into an apple shape, and winding by using a protection belt 91.
The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On this basis, can be right the utility model discloses carry out multiple replacement and improvement, these all fall into the utility model discloses a protection scope.
Claims (10)
1. A66 kV composite cable termination, comprising, in order from top to bottom: a conductor leading-out bar (1), an upper hardware fitting (3), a composite sleeve (4), a stress cone (5) at the inner side of the composite sleeve (4), an installation flange (6) and a cable protection pipe (7),
the conductor leading-out rod (1) is connected with the upper hardware fitting (3), and a crimping terminal is arranged at the lower part of the conductor leading-out rod (1) to be connected with a cable (9);
the upper end of the composite sleeve (4) is connected with the upper hardware fitting (3), and the lower end of the composite sleeve (4) is connected with the mounting flange (6);
the mounting flange (6) is provided with a through hole, and the cable protection tube (7) is connected with the through hole of the mounting flange (6), so that a cable (9) extends into the inner side of the composite sleeve (4) through the protection tube (7) and is connected with a crimping terminal at the lower end of the conductor leading-out rod (1);
the stress cone (5) is sleeved on the cable (9);
insulating filling liquid is filled between the stress cone (5) and the composite sleeve (4);
the mounting flange (6) is provided with a supporting flange (61), and the supporting flange (61) and the stress cone (5) are fixed through a hose clamp (63).
2. The 66kV composite cable termination of claim 1,
the conductor is drawn excellent (1) and is the column, and the middle part has conductor fixed fitting (11), and upper portion gold utensil (3) are the round platform form, have the through-hole, the conductor is drawn excellent (1) and is passed the through-hole of upper portion gold utensil (3) for the conductor is drawn excellent (1) lower extreme and is located upper portion gold utensil (3) below, and conductor fixed fitting (11) are located upper portion gold utensil (3) top, and upper portion gold utensil (3) top still has shield cover (2), shield cover (2) have the through-hole, make conductor draw excellent (1) upper portion to pass shield cover (2).
3. The 66kV composite cable termination of claim 1,
the outer surface of the composite sleeve (4) is of an umbrella skirt laminated structure, the length of the composite sleeve is 700-1300 mm, and the creep distance of the umbrella skirt is not less than 2000 mm.
4. The 66kV composite cable termination of any one of claims 1 to 3,
the inner side of the composite sleeve (4) is not in contact with the stress cone (5), and the inner side of the composite sleeve (4) is filled with insulating filling liquid, so that the cable (9) and the stress cone (5) positioned on the inner side of the composite sleeve (4) are completely soaked in the insulating filling liquid.
5. The 66kV composite cable termination of any one of claims 1 to 3,
the shape of the supporting flange (61) corresponds to the shape of the lower end of the stress cone (5) so as to support the stress cone (5).
6. The 66kV composite cable termination of any one of claims 1 to 3,
the hose clamp (63) is of a belt-shaped annular structure and is provided with an opening, the inner side of the annular shape of the hose clamp (63) is tightly attached to the outer side of the stress cone (5) and is positioned on the same plane with the upper end of the supporting flange (61), so that the stress cone (5) is tightly attached to the supporting flange (61) when the hose clamp (63) is tightened, and a fastening mechanism is arranged at the opening position of the hose clamp (63) so that the annular shape of the hose clamp (63) can be radially contracted and tightened.
7. The 66kV composite cable termination of any one of claims 1 to 3,
the mounting flange (6) is in a round table shape, a supporting insulator (8) is further fixed to the outer edge of the circumference of the lower end of the mounting flange (6), and the mounting flange (6) is provided with a through hole, so that a cable (9) can penetrate through the through hole, enter the inner side of the composite sleeve (4) and be connected with a crimping terminal of the conductor leading-out rod (1).
8. The 66kV composite cable termination of any one of claims 1 to 3,
the stress cone (5) and the cable (9) are in interference fit, and the centripetal interference magnitude of the inner diameter of the stress cone (5) is 1-15 mm.
9. The 66kV composite cable termination of claim 8,
the cable protection pipe (7) is connected to the lower end of the through hole of the mounting flange (6) and wraps a part of cable (9), and the inner diameter of the lower end of the cable protection pipe (7) is narrowed.
10. The 66kV composite cable termination of claim 9,
the contact position of the lower end of the cable protection pipe (7) and the cable (9) is provided with a lead seal, and a protection belt (91) is wound on the outer sides of the cable protection pipe (7), the lead seal and the cable (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287815.7U CN210780045U (en) | 2019-08-09 | 2019-08-09 | 66kV combined type cable terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287815.7U CN210780045U (en) | 2019-08-09 | 2019-08-09 | 66kV combined type cable terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210780045U true CN210780045U (en) | 2020-06-16 |
Family
ID=71041062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921287815.7U Active CN210780045U (en) | 2019-08-09 | 2019-08-09 | 66kV combined type cable terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210780045U (en) |
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2019
- 2019-08-09 CN CN201921287815.7U patent/CN210780045U/en active Active
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