CN117995468A - Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable - Google Patents
Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable Download PDFInfo
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- CN117995468A CN117995468A CN202311820134.3A CN202311820134A CN117995468A CN 117995468 A CN117995468 A CN 117995468A CN 202311820134 A CN202311820134 A CN 202311820134A CN 117995468 A CN117995468 A CN 117995468A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/189—Radial force absorbing layers providing a cushioning effect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/028—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients with screen grounding means, e.g. drain wires
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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
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
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- Cable Accessories (AREA)
Abstract
The invention discloses an intermediate cold-shrink cable accessory for a crosslinked polyethylene insulated power cable, which relates to the technical field of cold-shrink cable accessories and comprises two symmetrically arranged power cables, wherein the power cables consist of an external cable sheath and three internal cables; be provided with the shrinkage middleware between two symmetrical conductors, shrinkage middleware outside cover is equipped with tinned copper net cover, and tinned copper net cover one side is provided with shielding ground wire, and two inner sheath layer outside cover are equipped with interior insulation protection composite layer, and interior insulation protection composite layer outside cover is equipped with outer insulation protection composite layer, and outer insulation protection composite layer outside cover is equipped with the armor area. The invention improves the electrical performance and electromagnetic shielding effect of the cable system and the performance and maintainability of the cable system through multi-layer insulation and shielding protection.
Description
Technical Field
The invention relates to the technical field of cold-shrink cable accessories, in particular to an intermediate cold-shrink cable accessory for a crosslinked polyethylene insulated power cable.
Background
Crosslinked polyethylene (XLPE) insulated power cables are one type of cable commonly used to transmit power. It is widely used in power transmission and distribution systems for underground cable lines, underground cable channels, power substations, industrial facilities, and buildings. The crosslinked polyethylene is a polymer material, and forms a three-dimensional network structure among molecular chains through a special crosslinking process, so that the electric breakdown resistance and the thermal performance of the crosslinked polyethylene are improved. The special insulating material can bear power transmission under the conditions of high temperature and high voltage, and reduces the risk of insulation aging of the electric wire. Meanwhile, the XLPE insulated cable has excellent heat resistance and can be operated in a high-temperature environment without softening or deforming, so that the XLPE insulated cable is widely used for conveying high-voltage power, including power transmission among transformer stations, urban power grids, underground cable lines, submarine cables, industrial facilities, power distribution systems in buildings and the like.
In a crosslinked polyethylene insulated power cable system, an intermediate shrink cable accessory is an important component for connecting, maintaining and insulating cables, and is generally used in an intermediate position of the cables to ensure the reliability and safety of the cable system. The primary function of the intermediate shrink cable accessory is to provide cable connection, insulation and protection against damage, contamination and electrical failure of the cable connection point.
The cold shrink piece is usually made of a silica gel material, and is expanded and deformed by pre-expanding the support tube, and is covered at the installation position by self rebound resilience through drawing the support tube during installation, and the cold shrink piece is cold shrink in a mode of not needing flame heating and deformation; conventional medium pressure cold shrink straight through joints (important main body products of intermediate accessories) are usually a combination of stress cones, conductive tubes, insulating layers and outer shielding layers. Typically, silicone rubber products do not possess sufficient mechanical protection capability themselves and may be susceptible to mechanical damage, such as physical impact or extrusion, resulting in damage to the silicone body. While the design or installation of the shield is insufficient to provide the necessary electromagnetic shielding effect, the cable may be susceptible to external electromagnetic interference, thereby affecting its performance, improper grounding or failure of the shield may result in grounding problems of the cable system, causing electrical failure or danger.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides an intermediate cold-shrink cable accessory for a crosslinked polyethylene insulated power cable, which aims to overcome the technical problems in the prior art.
For this purpose, the invention adopts the following specific technical scheme:
The utility model provides a cross-linked polyethylene insulating power cable is with middle shrinkage cable accessory, includes two symmetrical power cable that set up, and this power cable comprises outside cable sheath and inside three cable conductor, its characterized in that, cable sheath from inside to outside includes inner sheath layer, steel band armour and outer sheath layer in proper order, and the cable conductor includes conductor, insulating layer insulation shielding layer and copper shielding layer from inside to outside in proper order; be provided with the shrinkage middleware between two symmetrical conductors, shrinkage middleware outside cover is equipped with tinned copper net cover, and tinned copper net cover one side is provided with shielding ground wire, and two inner sheath layer outside cover are equipped with interior insulation protection composite layer, and interior insulation protection composite layer outside cover is equipped with outer insulation protection composite layer, and outer insulation protection composite layer outside cover is equipped with the armor area.
Further, in order to ensure the cleanliness of the power cable to the greatest extent, the residual semiconductive particles in the insulation area are avoided, the cable is stripped into a multi-layer extending structure by adopting a stripping process, the installation and realization of the subsequent conductor connection are facilitated, the copper shielding layer, the insulation shielding layer and the insulation layer are sequentially stripped by adopting the stripping process, and the end surfaces of the insulation layer and the insulation shielding layer are chamfered by adopting a notch chamfering process; the outer surface of the insulating layer and the outer surface of the insulating shielding layer are polished by adopting mesh abrasive cloth strips and are used for removing residual semiconductive particles on the outer surface of the insulating layer, and a semiconductive wrapping adhesive tape is sleeved at the joint of the end surfaces of the insulating shielding layer and the copper shielding layer.
Further, in order to utilize conductor connection, semi-conductive area, shrinkage intermediate body and interior waterproof insulation composite tape, reliable connection and insulation between the conductors have been realized, add semi-conductive area and interior waterproof insulation composite tape in insulating shield layer outside simultaneously, effectively improved cable system's electrical property, shielding ability and waterproof performance, ensure cable tie's reliability, security and anti environmental impact ability, the shrinkage intermediate piece is including setting up the conductor connection between two symmetrical conductors, conductor connection outside cover is equipped with the semi-conductive area, semi-conductive area outside cover is equipped with shrinkage intermediate body, shrinkage intermediate body both ends all are provided with interior waterproof insulation composite tape, conductor connection covers two conductors entirely, semi-conductive area both ends all extend to the insulating layer outside, interior waterproof insulation composite tape is located insulating shield layer outside.
Further, in order to ensure the safety and performance stability of the cable system, the two ends of the tinned copper mesh sleeve are provided with inner constant force coils, the two ends of the shielding ground wire are located on the inner side of the circumference of the inner constant force coils, the outer side of the circumference of the inner constant force coils is sleeved with PVC rubber belt rings, and the middle positions of the tinned copper mesh sleeve and the shielding ground wire are provided with middle rubber belt rings.
Further, in order to effectively provide dual insulation and waterproof protection of cable conductor, set up waterproof sealant simultaneously through including insulating protection composite layer inlayer and outer both ends, and set up the armor ground wire between insulating protection composite layer inlayer including and outer insulating protection composite layer inlayer, further strengthened cable system's waterproof performance and electromagnetic shielding effect, this helps guaranteeing cable system's reliability and stability under humid environment, and reduce the influence to outside interference, insulating protection composite layer is bilayer structure with outer insulating protection composite layer in, and insulating protection composite layer is PVC adhesive tape layer with the inlayer of outer insulating protection composite layer, outer is waterproof insulation composite adhesive tape layer, insulating protection composite layer inlayer all is provided with waterproof sealant with outer both ends, be provided with the armor ground wire between insulating protection composite layer inlayer and the outer insulating protection composite layer.
Further, in order to enhance the connection stability between the mechanical protection and the insulation layer of the cable, the external constant force spring ring provides reliable ground connection, the grounding performance of the cable system is ensured, the sealing PVC adhesive tape is helpful to prevent external moisture and pollutants from entering the cable system, thereby maintaining the reliability and long-term performance of the cable, the anti-interference, mechanical protection and maintainability of the cable system are jointly improved, the two ends of the armored ground wire are provided with the external constant force spring ring, the external constant force spring ring is positioned between the inner insulation protection composite layer and the outer insulation protection composite layer, the two ends of the armored belt are respectively positioned outside the two outer sheath layers, and the two outer sides of the two ends of the armored belt are respectively provided with the sealing PVC adhesive tape.
The beneficial effects of the invention are as follows:
1. Through multilayer composite design, the cable line has obtained multilayer insulation and shielding protection restoration, has improved cable system's electrical property and electromagnetic shield effect, utilizes shrinkage middleware and conductor connection, semiconductive belt, interior waterproof insulation composite tape's design simultaneously to help realizing reliable connection and insulation between the conductor, has improved cable system's performance and maintainability, guarantees cable connection's integrality.
2. The stripping process, the chamfering and polishing process are adopted to effectively remove the residual semiconductive particles in the insulation area, so that the cleanliness of the insulation area is improved, the insulation quality of the cable is ensured, and the cable system is effectively reduced from being influenced by external electromagnetic interference through the configuration of a tinned copper net sleeve, a shielding ground wire, a semiconductive belt, an inner waterproof insulation composite adhesive tape and the like, and the waterproof performance of the cable system is improved.
3. By arranging the structures such as the external constant force spring ring, the sealing PVC adhesive tape, the armored ground wire and the like at the joint, the mechanical protection and grounding system of the cable are enhanced, and the stability and the anti-interference performance of the cable system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an intermediate cold shrink cable attachment for a crosslinked polyethylene insulated power cable according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic illustration of the structure of a crosslinked polyethylene insulated power cable with three cables of the power cable not stripped in an intermediate cold shrink cable attachment according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a cross-linked polyethylene insulated power cable with three cables stripped in an intermediate cold shrink cable attachment in accordance with an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at B;
Fig. 6 is a schematic structural view of a cross-linked polyethylene insulated power cable according to an embodiment of the present invention after two power cables are connected with a cold shrink intermediate member in an intermediate cold shrink cable attachment.
In the figure:
1. An inner sheath layer; 2. steel band armor; 3. an outer sheath layer; 4. a conductor; 5. an insulating layer; 6. an insulating shielding layer; 7. a copper shield layer; 8. a cold shrink intermediate member; 801. a conductor connection; 802. a semiconductive belt; 803. a cold shrink intermediate body; 804. an inner waterproof insulating composite adhesive tape; 9. a tin-plated copper net sleeve; 10. shielding the ground wire; 11. an inner insulating protective composite layer; 12. an outer insulating protective composite layer; 13. an armor belt; 14. a semiconductive wrapping tape; 15. an inner constant force spring ring; 16. PVC rubber belt ring; 17. a middle adhesive tape ring; 18. waterproof sealant; 19. armoring the ground wire; 20. an external constant force spring ring; 21. sealing PVC adhesive tape.
Detailed Description
For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to an embodiment of the present invention, there is provided an intermediate cold shrink cable accessory for a crosslinked polyethylene insulated power cable.
The invention is further described with reference to the accompanying drawings and the specific embodiments, as shown in fig. 1-6, an intermediate cold-shrink cable accessory for a crosslinked polyethylene insulated power cable according to an embodiment of the invention comprises two symmetrically arranged power cables, wherein the power cables consist of an external cable sheath and three internal cables, and the cable sheath is characterized in that the cable sheath sequentially comprises an inner sheath layer 1, a steel belt armor 2 and an outer sheath layer 3 from inside to outside, and the cables sequentially comprise a conductor 4, an insulating layer 5 insulating shielding layer 6 and a copper shielding layer 7 from inside to outside; be provided with shrinkage middleware 8 between two symmetrical conductors 4, shrinkage middleware 8 outside cover is equipped with tinned copper net cover 9, and tinned copper net cover 9 one side is provided with shielding ground wire 10, and the cover is equipped with interior insulation protection composite layer 11 outside two inner sheath layer 1, and the cover is equipped with outer insulation protection composite layer 12 outside the interior insulation protection composite layer 11, and the cover is equipped with armor tape 13 outside the outer insulation protection composite layer 12.
By means of the technical scheme, through the multi-layer composite design, the cable is subjected to multi-layer insulation and shielding protection repair, the electrical performance and electromagnetic shielding effect of the cable system are improved, meanwhile, the reliable connection and insulation between conductors are realized by utilizing the design of the cold contraction intermediate piece 8, the performance and maintainability of the cable system are improved, and the integrity of cable connection is ensured.
In one embodiment, for the above cable, a stripping process is used to strip the copper shielding layer 7, the insulating shielding layer 6 and the insulating layer 5 in sequence, and the end surfaces of the insulating layer 5 and the insulating shielding layer 6 are chamfered by a notch chamfering process; the outer surface of the insulating layer 5 and the outer surface of the insulating shielding layer 6 are polished by adopting 400-mesh abrasive cloth strips for removing residual semiconductive particles on the outer surface of the insulating layer 5, and the semiconductive wrapping adhesive tape 14 is sleeved at the joint of the end surfaces of the insulating shielding layer 6 and the copper shielding layer 7, so that the cleanliness of the power cable can be guaranteed to the greatest extent, residual semiconductive particles in an insulating area are avoided, the cable is stripped into a multilayer extending structure by adopting a stripping process, and the installation and realization of subsequent conductor connection are facilitated.
In one embodiment, for the cold shrink intermediate member 8, the cold shrink intermediate member 8 includes a conductor connection 801 (standard name: connecting tube) disposed between two symmetrical conductors 4, a semiconductive tape 802 is sleeved outside the conductor connection 801, a cold shrink intermediate body 803 is sleeved outside the semiconductive tape 802, both ends of the cold shrink intermediate body 803 are provided with an inner waterproof insulation composite adhesive tape 804, the conductor connection 801 completely covers the two conductors 4, both ends of the semiconductive tape 802 extend to the outside of the insulating layer 5, the inner waterproof insulation composite adhesive tape 804 is located outside the insulating shielding layer 6, so that reliable connection and insulation between the conductors 4 can be realized by using the conductor connection 801, the semiconductive tape 802, the cold shrink intermediate body 803 and the inner waterproof insulation composite adhesive tape 804, and meanwhile, the semiconductive tape 802 and the inner waterproof insulation composite adhesive tape 804 are added outside the insulating shielding layer 6, so that the electrical performance, shielding capability and waterproof performance of the cable system are effectively improved, and reliability, safety and environmental impact resistance of the cable connection point are ensured.
In one embodiment, for the tinned copper mesh 9, inner constant force springs 15 are disposed at two ends of the tinned copper mesh 9, two ends of the shielding ground wire 10 are disposed at inner sides of the circumference of the inner constant force springs 15, PVC tape rings 16 are disposed at outer sides of the circumference of the inner constant force springs 15, and middle tape rings 17 are disposed at middle positions of the tinned copper mesh 9 and the shielding ground wire 10, so as to ensure safety and performance stability of the cable system.
In one embodiment, for the inner insulation protection composite layer 11, the inner insulation protection composite layer 11 and the outer insulation protection composite layer 12 are of a double-layer structure, the inner layers of the inner insulation protection composite layer 11 and the outer insulation protection composite layer 12 are all PVC tape layers, the outer layers are all waterproof insulation composite tape layers, waterproof sealant 18 is arranged at two ends of the inner layer and the outer layer of the inner insulation protection composite layer 11, and an armored ground wire 19 is arranged between the inner layer and the outer layer of the inner insulation protection composite layer 11, so that double insulation and waterproof protection of a cable are effectively provided, and meanwhile, by arranging waterproof sealant 18 at two ends of the inner layer and the outer layer of the inner insulation protection composite layer 11, and arranging an armored ground wire 19 between the inner layer of the inner insulation protection composite layer 11 and the inner layer of the outer insulation protection composite layer 12, waterproof performance and electromagnetic shielding effect of the cable system are further enhanced, reliability and stability of the cable system in a wet environment are guaranteed, and influence on external interference is reduced.
In one embodiment, for the armored ground wire 19, the two ends of the armored ground wire 19 are provided with the outer constant force spring rings 20, the outer constant force spring rings 20 are positioned between the inner insulation protection composite layer 11 and the outer insulation protection composite layer 12, the two ends of the armored belt 13 are respectively positioned outside the two outer sheath layers 3, and the two outer sides of the two ends of the armored belt 13 are provided with the sealing PVC adhesive tape 21, so that the connection stability between the mechanical protection and the insulation layers of the cable is enhanced, the reliable ground wire connection is provided by the outer constant force spring rings 20, the grounding performance of the cable system is ensured, and the sealing PVC adhesive tape 21 is helpful for preventing external moisture and pollutants from entering the cable system, so that the reliability and long-term performance of the cable are maintained, and the anti-interference, mechanical protection and maintainability of the cable system are jointly improved.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes in detail the working principle or operation manner of the present invention in the actual process.
In practical application, the operation and installation are carried out on the basis of two power cables according to the installation procedure, and the specific operation procedure is as follows: preparation work, stripping the outer sheath layer 3 and the steel band armor 2 of a cable, stripping the copper shielding layer 7 and the insulating shielding layer 6 of the cable, stripping the insulating layer 5 and chamfering, installing a cold-shrink straight-through joint body (cold-shrink intermediate piece 8), installing the cold-shrink straight-through joint body, repairing waterproof layers and semiconducting layers at two ends of the intermediate body, repairing the copper shielding layer 7 (installing an inner constant force spring ring 15 and a PVC adhesive tape ring 16), winding an inner insulating protective composite layer 11, installing an armored ground wire 19 (the outer constant force spring rings 20 are fixed at two sides of the armored ground wire 19), winding an outer insulating protective composite layer 12 and winding an armored belt 13.
In summary, by means of the technical scheme, the cable wire is subjected to multi-layer insulation and shielding protection repair through the multi-layer composite design, so that the electrical performance and electromagnetic shielding effect of the cable system are improved, meanwhile, the reliable connection and insulation between conductors are realized by utilizing the design of the cold shrink intermediate piece 8, the performance and maintainability of the cable system are improved, and the integrity of cable connection is ensured. By adopting the stripping process, chamfering and polishing processes, the residual semiconductive particles in the insulation area are effectively removed, so that the cleanliness of the insulation area is improved, the insulation quality of the cable is ensured, and on the basis, the cable system is effectively reduced from the influence of external electromagnetic interference by the configuration of the tinned copper mesh 9, the shielding ground wire 10, the semiconductive belt 802, the inner waterproof insulation composite adhesive tape 804 and the like, and meanwhile, the waterproof performance of the cable system is improved. By arranging the structures such as the outer constant force spring ring 20, the sealing PVC adhesive tape 21, the armored ground wire 19 and the like at the connecting part, the mechanical protection and grounding system of the cable is enhanced, and the stability and the anti-interference performance of the cable system are improved.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a cross-linked polyethylene insulating power cable is with middle shrinkage cable accessory, includes two power cable that symmetry set up, this power cable comprises outside cable sheath and inside three cable conductor, its characterized in that, the cable sheath includes inner sheath layer (1), steel band armour (2) and oversheath layer (3) from inside to outside in proper order, the cable conductor includes conductor (4), insulating layer (5) insulating shield layer (6) and copper shield layer (7) from inside to outside in proper order;
Be provided with shrinkage middleware (8) between two symmetries conductor (4), shrinkage middleware (8) outside cover is equipped with tinned copper net cover (9), tinned copper net cover (9) one side is provided with shielding ground wire (10), two the cover is equipped with interior insulation protection composite layer (11) in inner sheath layer (1) outside, the cover is equipped with outer insulation protection composite layer (12) in the outer cover of interior insulation protection composite layer (11), outer insulation protection composite layer (12) outside cover is equipped with armor tape (13).
2. The intermediate cold shrink cable accessory for a crosslinked polyethylene insulated power cable according to claim 1, wherein the cable sequentially strips the copper shielding layer (7), the insulating shielding layer (6) and the insulating layer (5) by adopting a stripping process, and the end surfaces of the insulating layer (5) and the insulating shielding layer (6) are chamfered by adopting a notch chamfering process;
The outer surface of the insulating layer (5) and the outer surface of the insulating shielding layer (6) are polished by using 400-mesh abrasive cloth strips, and the abrasive cloth strips are used for removing semiconductive particles remained on the outer surface of the insulating layer (5).
3. An intermediate cold shrink cable accessory for a cross-linked polyethylene insulated power cable according to claim 1 or 2, characterized in that the end surface connection of the insulating shielding layer (6) and the copper shielding layer (7) is sleeved with a semi-conductive wrapping tape (14).
4. The middle cold-shrink cable accessory for the crosslinked polyethylene insulated power cable according to claim 1, wherein the cold-shrink intermediate piece (8) comprises a conductor connection (801) arranged between two symmetrical conductors (4), a semi-conductive belt (802) is sleeved outside the conductor connection (801), a cold-shrink intermediate body (803) is sleeved outside the semi-conductive belt (802), and inner waterproof insulating composite adhesive tapes (804) are arranged at two ends of the cold-shrink intermediate body (803).
5. An intermediate cold shrink cable attachment for a cross-linked polyethylene insulated power cable according to claim 4, characterized in that the conductor connection (801) completely covers both conductors (4), both ends of the semiconductive tape (802) extend outside the insulating layer (5), the inner waterproof insulating composite tape (804) being located outside the insulating shielding layer (6).
6. The middle cold-shrink cable accessory for the crosslinked polyethylene insulated power cable according to claim 1, wherein inner constant force spring rings (15) are arranged at two ends of the tinned copper mesh (9), two ends of the shielding ground wire (10) are located on the inner circumference of the inner constant force spring rings (15), PVC adhesive tape rings (16) are sleeved on the outer circumference of the inner constant force spring rings (15), and middle adhesive tape rings (17) are arranged at the middle positions of the tinned copper mesh (9) and the shielding ground wire (10).
7. The cold shrink cable accessory for a cross-linked polyethylene insulated power cable according to claim 1, wherein the inner insulation protection composite layer (11) and the outer insulation protection composite layer (12) are both of a double-layer structure, and the inner layers of the inner insulation protection composite layer (11) and the outer insulation protection composite layer (12) are both PVC tape layers, and the outer layers are both waterproof insulation composite tape layers.
8. The middle cold shrink cable accessory for the crosslinked polyethylene insulated power cable according to claim 1 or 7, wherein waterproof sealant (18) is arranged at two ends of the inner layer and the outer layer of the inner insulation protection composite layer (11), and an armored ground wire (19) is arranged between the outer layer of the inner insulation protection composite layer (11) and the inner layer of the outer insulation protection composite layer (12).
9. An intermediate cold shrink cable accessory for a cross-linked polyethylene insulated power cable according to claim 8, characterized in that the armoured earth wires (19) are provided with outer constant force coils (20) at both ends, and the outer constant force coils (20) are located between the inner insulation protection composite layer (11) and the outer insulation protection composite layer (12).
10. An intermediate cold shrink cable accessory for a cross-linked polyethylene insulated power cable according to claim 1, wherein two ends of the armor tape (13) are respectively positioned outside the two outer sheath layers (3), and sealing PVC tapes (21) are respectively arranged outside the two ends of the armor tape (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311820134.3A CN117995468A (en) | 2023-12-27 | 2023-12-27 | Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311820134.3A CN117995468A (en) | 2023-12-27 | 2023-12-27 | Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable |
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| CN117995468A true CN117995468A (en) | 2024-05-07 |
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| CN202311820134.3A Pending CN117995468A (en) | 2023-12-27 | 2023-12-27 | Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable |
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