CN217824162U - Insulated drainage wire prepared from insulated cable and suitable for double drainage strings - Google Patents
Insulated drainage wire prepared from insulated cable and suitable for double drainage strings Download PDFInfo
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- CN217824162U CN217824162U CN202221504616.9U CN202221504616U CN217824162U CN 217824162 U CN217824162 U CN 217824162U CN 202221504616 U CN202221504616 U CN 202221504616U CN 217824162 U CN217824162 U CN 217824162U
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- insulated cable
- drainage wire
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Abstract
The utility model discloses an insulating drainage wire suitable for two drainage cluster of insulated cable preparation, include: the system comprises an insulated cable, an umbrella skirt sheath, a strain clamp, a heat-shrinkable tube, 6 sets of cold-shrinkable terminals and 2 suspension clamps; wherein insulated cable includes: the insulated cable comprises a conductor, a semiconductor layer and an insulating layer, wherein the semiconductor layer is wrapped outside the conductor, the insulating layer is wrapped outside the semiconductor layer, an umbrella skirt sheath is sleeved outside the insulated cable, and two ends of the umbrella skirt sheath are connected with two ends of the insulated cable through cold shrinkage terminals; the part of the insulated cable, which is close to the exposed conductor at the two ends of the strain clamp, is hydraulically connected with the strain clamp, and the nominal sectional area of the insulated cable conductor is more than 10 percent of the sectional area of the original conductor of the line to be modified; the distance between the initial installation positions of the cold-shrinkage terminal heads close to the two sides of the suspension clamp and the suspension clamp is less than or equal to 20cm. The insulating drainage wire is suitable for insulating drainage wires adopting double-drainage-string insulators, and has the advantages of good insulating property, excellent corrosion resistance and long service life.
Description
Technical Field
The utility model belongs to the technical field of transmission line equipment, concretely relates to insulating drainage wire suitable for two drainage strings of insulated cable preparation.
Background
The conductive device connected with the strain clamp of the wires on the two sides of the strain tower is called an overhead transmission line drainage wire, also called a jumper. The drainage wire is required to keep the electrified conducting wire and the conducting part of the tower at a sufficient electrical distance when the drainage wire works normally.
In recent years, along with improvement of ecological environment, the activity area of birds is enlarged, the activity frequency of birds is increased, and drainage wire insulation accidents caused by bird damage occur sometimes. In addition, in recent years, extreme strong wind weather sometimes occurs, so that the wind deflection discharge fault of the drainage wire is caused, and the bird damage tripping and wind deflection flashover faults of the power transmission line directly influence the electric energy quality and the reliability of power utilization.
The existing control measures for bird damage faults at present comprise: and bird droppings preventing devices such as bird stabs, bird baffles, bird droppings preventing insulators and the like are used for preventing the long strings of bird droppings from falling. Although the flashover between wire and the cross arm that present anti-bird measure led to has reduced bird excrement and has caused, insulator surface flashover trouble, nevertheless still can take place because of the flashover between ground wire that birds perch point removed towards the shaft tower outside and the jump line, partial strain insulator or corner tower shaft tower horizontal plane and wire trend are nonparallel, the jump line cross arm can't be parallel with the wire trend, one side jump line cross arm is on the high side, it is nearer with the ground wire distance, air gap reduces, bird excrement defecation easily causes circuit single-phase ground connection, lead to the circuit tripping operation. The main reason for the fault is that the jumper angle steel and the section of the drainage wire are not coated by an insulating sheath, so that the jumper angle steel and the section of the drainage wire become bird damage prevention blind spots and bird droppings are caused to flashover. At present, 10kV overhead transmission lines are subjected to insulation transformation by adopting overhead insulated cables, so that the ground faults caused by trees, bamboos and other foreign matters are reduced, and the reliability of the overhead transmission lines is improved. The requirement on the long and high insulating strength of the overhead transmission line with the voltage class of 110kV or above is high, the whole line insulation transformation is not suitable, but the local insulation transformation can be carried out on the weak link of the line, such as the drainage wire, so that the insulating property is improved, and the bird damage fault is reduced.
Some transmission lines with severe operating environments, such as strong wind areas or other relatively variable weather areas, may be affected by strong wind when the transmission lines of the power system operate, so that the transmission lines swing left and right, which may cause a reduction in the safety distance between a wire and a tower or other objects, and if the operating voltage of the power system increases, insulation breakdown may be caused, which may cause the situation that the lines discharge to surrounding objects or towers. With the continuous increase of the voltage grade of the power system, the safety distance between the transmission conductors is larger and larger, and the length requirement of the conductors is also larger and larger, so that the wind bias discharge fault of the transmission line is more and more frequent.
In order to reduce bird droppings flashover and windage yaw flashover, the drainage wire needs to be subjected to design transformation suitable for double drainage string insulation. The insulating transformation of going on insulating transformation back drainage wire surface can cladding one deck insulating layer to former drainage wire, after carrying out insulating cladding transformation, the self weight of drainage wire also increases to some extent, has not only carried out insulating transformation, prevent wind partially also indirectly promotion of effect moreover.
In an actual power transmission line, two insulating drainage strings are needed for part of corner towers due to corner angles and sizes, so that the existing overhead insulated cable is adopted to design the insulating drainage wire of the double drainage strings suitable for the power transmission lines of 110kV and 220kV, so that the insulation level of the drainage wire and a ground wire or an iron tower is improved, and the bird droppings flashover and windage yaw flashover probability are reduced.
Disclosure of Invention
For solving exist among the prior art not enough, the utility model aims to provide an insulating drainage wire suitable for two drainage strings of insulated cable preparation. To above-mentioned 110kV, 220kV drainage wire prevent not enough of bird pest flashover, the utility model discloses based on reform transform aerial insulated cable, provide the insulating drainage wire of the transmission line that is applicable to two drainage strings, this insulating configuration can effectively avoid the earth fault who leads to because of bird's droppings flashover.
The utility model adopts the following technical proposal.
An insulated drainage wire suitable for a dual drainage string prepared from an insulated cable, comprising: the cable comprises an insulated cable, an umbrella skirt sheath, a strain clamp, a suspension clamp, a composite insulator and 2 suspension clamps;
wherein insulated cable includes: the conductor, the semiconductor layer and the insulating layer, the semiconductor layer is wrapped up in the conductor outside, and the insulating layer is wrapped up in the semiconductor layer outside.
The conductor parts of the insulated cable close to the two ends of the strain clamp are hydraulically pressed with the strain clamp, and the contact part of the insulated cable and the strain clamp is sealed by sealant;
the compression joint part of the insulated cable and the strain clamp is sleeved in the heat shrink tube for sealing;
one end of the suspension clamp is connected with the insulated cable, and the other end of the suspension clamp is connected with the composite insulator;
preferably, the cold-shrink terminal 5 near both sides of the suspension clamp 6 is initially installed at a position less than or equal to 20cm from the suspension clamp 6.
Preferably, the insulating layer is a crosslinked polyethylene layer.
Preferably, the cold-shrink termination cross-sectional area is greater than the conductor cross-sectional area.
Preferably, the thickness of the heat shrinkable tube is 4mm.
Preferably, when the insulated drainage wire is an insulated drainage wire of a 110kV power transmission line, the thickness of the insulated layer is more than 3mm. The length of the umbrella skirt sheath is more than 40cm.
When the insulated drainage wire is a 220kV power transmission line insulated drainage wire, the thickness of the insulated layer is larger than 6mm. The length of the umbrella skirt sheath is more than 80cm.
Preferably, the length of the installation position of the cold shrinkage terminal head of the shed sheath close to one end of the strain clamp away from the strain clamp is more than 50cm.
The utility model has the advantages that compared with the prior art,
(1) The utility model discloses compare with conventional drainage wire, it is good to ground wire, iron tower insulating properties, can effectively reduce and take place flashover trouble under the circumstances such as bird's dung, windage yaw and foreign matter.
(2) The utility model discloses electric field around the semiconductor layer among the insulating layer can the homogenization drainage wire, avoid insulating layer surface to take place partial discharge, can improve the drainage wire electric field distribution around betterly, has effectively solved the too high problem of local voltage, has avoided the local steep voltage gradient that produces.
(3) The utility model provides an insulating drainage wire simple structure can carry out the flexibility to select length according to on-the-spot actual need to be convenient for preparation and installation.
(4) The utility model discloses the electric field distortion that takes place when the full skirt at wire middle part on the one hand can homogenization insulating material and metal contact, and on the other hand can increase the creepage distance on insulating layer surface, takes place flashover along insulating surface when preventing insulating layer surface long-pending dirt.
(5) The utility model discloses utilize cable termination head to carry out the transformation of insulating cladding full skirt to built on stilts insulated cable, its good electrical properties of cable termination head and mechanical properties can use under various abominable environment for a long time.
(6) The utility model discloses utilize current built on stilts insulated cable to carry out 110kV and 220 kV's drainage wire and insulate the transformation, do not change original overhead line structure, only need lift original drainage wire off, with insulating drainage wire installed can, it is convenient to implement.
(7) The transformation method of the insulated drainage wire is simple and has low transformation cost. Convenient popularization and implementation and good economic benefit.
Drawings
Fig. 1 is a schematic structural view of an insulated drainage wire suitable for a double drainage string for manufacturing an insulated cable according to the present invention;
fig. 2 is a reference diagram of an insulating drainage wire using state suitable for a double drainage string for preparing an insulating cable according to the present invention;
the reference numbers in fig. 1-2 are illustrated as follows:
1-insulated cable, 1-1-conductor, 1-2-semiconductor layer, 1-3-insulating layer, 2-shed sheath, 3-strain clamp, 4-heat-shrinkable tube, 5-cold-shrinkage terminal, 6-suspension clamp and 7-composite insulator.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1.
An insulated cable is provided with insulated drainage wires suitable for double drainage strings, as shown in fig. 1 and 2. The method comprises the following steps: the cable comprises an insulated cable 1, an umbrella skirt sheath 2, a strain clamp 3, a suspension clamp 6, a composite insulator 7 and 2 suspension clamps 6.
Wherein the insulated cable 1 comprises: the semiconductor layer 102 is wrapped outside the conductor 101, and the insulating layer 103 is wrapped outside the semiconductor layer 102;
the umbrella skirt sheath 2 is sleeved outside the insulated cable 1, and two ends of the umbrella skirt sheath 2 are connected with two ends of the insulated cable 1 by cold-shrink terminals 5;
the part of the insulated cable 1, which is close to the conductors 101 at the two ends of the strain clamp 3, is hydraulically pressed with the strain clamp 3, and the contact part of the insulated cable 1 and the strain clamp 3 is sealed by sealant;
the compression joint part of the insulated cable 1 and the strain clamp 3 is sleeved in a heat shrink tube 4 for sealing;
one end of the suspension clamp 6 is connected with the insulated cable 1, and the other end of the suspension clamp 6 is connected with the composite insulator 7;
the present embodiment is preferably such that the present embodiment,
the distance from the initial installation position of the cold contraction terminal heads 5 close to the two sides of the suspension clamp 6 to the suspension clamp 6 is less than or equal to 20cm.
Embodiment preferably, the insulating layer 103 is an XLPE (cross linked polyethylene) layer.
The cross-sectional area of the cold-shrink terminal 5 is larger than the cross-sectional area of the conductor 101.
The thickness of the heat shrinkable tube is 4mm.
When the insulated drainage wire is the insulated drainage wire of a 110kV power transmission line, the thickness of the insulating layer 103 is larger than 3mm. The length of the shed sheath 2 is more than 40cm.
When the insulated drainage wire is a 220kV power transmission line insulated drainage wire, the thickness of the insulating layer 103 is larger than 6mm. The length of the shed sheath 2 is more than 80cm.
The length of the installation position of the cold shrinkage terminal 5 at one end of the shed sheath 2 close to the strain clamp 3 from the strain clamp 3 is more than 50cm.
The utility model has the advantages that compared with the prior art,
(1) The utility model discloses compare with conventional drainage wire, it is good to ground wire, iron tower insulating properties, can effectively reduce and take place flashover trouble under the circumstances such as bird's dung, windage yaw and foreign matter.
(2) The utility model discloses electric field around the semiconductor layer among the insulating layer can the homogenization drainage wire, avoid insulating layer surface to take place partial discharge, can improve the drainage wire electric field distribution around betterly, has effectively solved the too high problem of local voltage, has avoided the local steep voltage gradient that produces.
(3) The utility model provides an insulating drainage wire simple structure can carry out the flexibility to select length according to on-the-spot actual need to be convenient for preparation and installation.
(4) The utility model discloses the electric field distortion that takes place when the full skirt at wire middle part on the one hand can homogenization insulating material and metal contact, and on the other hand can increase the creepage distance on insulating layer surface, takes place the flashover along insulating surface when preventing insulating layer surface deposition.
(5) The utility model discloses utilize cable termination head to carry out the transformation of insulating cladding full skirt to built on stilts insulated cable, its good electrical properties of cable termination head and mechanical properties can use under various abominable environment for a long time.
(6) The utility model discloses utilize current built on stilts insulated cable to carry out 110kV and 220 kV's drainage wire and insulate the transformation, do not change original overhead line structure, only need lift original drainage wire off, with insulating drainage wire installed can, it is convenient to implement.
(7) The transformation method of the insulated drainage wire is simple and has low transformation cost. Convenient popularization and implementation and good economic benefit.
The applicant of the present invention has made detailed description and description on the implementation examples of the present invention with reference to the drawings, but those skilled in the art should understand that the above implementation examples are only the preferred embodiments of the present invention, and the detailed description is only for helping the reader to better understand the spirit of the present invention, and not for limiting the protection scope of the present invention, on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.
Claims (10)
1. An insulated drainage wire suitable for a dual drainage string made of an insulated cable, comprising: strain clamp (3), 2 suspension clamp (6), composite insulator (7), its characterized in that still includes: insulated cable (1), full skirt sheath (2), wherein insulated cable (1) includes: the semiconductor device comprises a conductor (101), a semiconductor layer (102) and an insulating layer (103), wherein the semiconductor layer (102) is wrapped outside the conductor (101), and the insulating layer (103) is wrapped outside the semiconductor layer (102);
the shed sheath (2) is sleeved outside the insulated cable (1), the part of the insulated cable (1), which is close to the conductors (101) at the two ends of the strain clamp (3), is hydraulically connected with the strain clamp (3), and the contact part of the insulated cable (1) and the strain clamp (3) is sealed by sealant;
one end of the suspension clamp (6) is connected with the insulated cable (1), and the other end of the suspension clamp (6) is connected with the composite insulator (7).
2. The insulated drainage wire suitable for double drainage strings prepared by the insulated cable according to claim 1,
two ends of the umbrella skirt sheath (2) are connected with two ends of the insulated cable (1) by cold-shrinkage terminals (5);
the cross-sectional area of the cold-shrink terminal (5) is larger than that of the conductor (101).
3. The insulated drainage wire prepared from the insulated cable according to claim 1 and suitable for double drainage strings,
the compression joint part of the insulated cable (1) and the strain clamp (3) is sleeved in a heat-shrinkable tube (4) for sealing;
the thickness of the heat shrinkable tube (4) is 4mm.
4. The insulated drainage wire prepared from the insulated cable according to claim 1 and suitable for double drainage strings,
the insulating layer (103) is a crosslinked polyethylene layer.
5. The insulated drainage wire prepared from the insulated cable according to claim 1 and suitable for double drainage strings,
when the insulated drainage wire is a 110kV power transmission line insulated drainage wire, the thickness of the insulating layer (103) is larger than 3mm.
6. The insulated drainage wire prepared from the insulated cable according to claim 1 and suitable for double drainage strings,
when the insulated drainage wire is a 220kV power transmission line insulated drainage wire, the thickness of the insulating layer (103) is larger than 6mm.
7. The insulated drainage wire prepared from the insulated cable according to claim 5 and suitable for the double drainage strings,
the length of the umbrella skirt sheath (2) is more than 40cm.
8. The insulated drainage wire prepared from the insulated cable according to claim 6 and suitable for the double drainage strings,
the length of the umbrella skirt sheath (2) is more than 80cm.
9. The insulated drainage wire suitable for double drainage strings prepared by the insulated cable according to claim 2,
the length of the installation position of the shrinkage terminal (5) of the shed sheath (2) close to one end of the strain clamp (3) from the strain clamp (3) is more than 50cm.
10. The insulated drainage wire prepared from the insulated cable according to claim 2 and suitable for the double drainage strings,
the distance between the initial installation positions of the cold-shrinkage terminal heads (5) close to the two sides of the suspension clamp (6) and the suspension clamp (6) is less than or equal to 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221504616.9U CN217824162U (en) | 2022-06-16 | 2022-06-16 | Insulated drainage wire prepared from insulated cable and suitable for double drainage strings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221504616.9U CN217824162U (en) | 2022-06-16 | 2022-06-16 | Insulated drainage wire prepared from insulated cable and suitable for double drainage strings |
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| Publication Number | Publication Date |
|---|---|
| CN217824162U true CN217824162U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221504616.9U Active CN217824162U (en) | 2022-06-16 | 2022-06-16 | Insulated drainage wire prepared from insulated cable and suitable for double drainage strings |
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| Country | Link |
|---|---|
| CN (1) | CN217824162U (en) |
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2022
- 2022-06-16 CN CN202221504616.9U patent/CN217824162U/en active Active
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