CN217386694U

CN217386694U - Cable structure with repair technology

Info

Publication number: CN217386694U
Application number: CN202221134654.XU
Authority: CN
Inventors: 陈文星; 梁伟标; 陈红杰; 谭志斌
Original assignee: Guangdong Raising Synthesis Energy Services Co ltd
Current assignee: Guangdong Raising Synthesis Energy Services Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-09-06
Anticipated expiration: 2032-05-12

Abstract

The utility model belongs to the technical field of the cable, especially, be a take repair technology's cable construction, including body, former XLPE insulation and mould notes response accuse body, the inside of body is provided with first conductor, and the tip of first conductor is provided with the welding point, the avris of welding point has concatenated the second conductor, and the outside of second conductor is provided with former internal shield to the outside of welding point with be provided with new internal shield, former XLPE is insulating to be set up in former internal shield's the outside, and the insulating avris of former XLPE is provided with newly-increased XLPE and insulating. The cable structure conductor with the repair technology adopts the heat release welding technology, the conductor has equal diameter, low resistance and high strength, welding points are never aged, the conductor is subjected to fault current impact and long-term heavy current operation, the electrical connection is durable and reliable, the electrical stability and the operation reliability are improved, the cable structure conductor has higher electrical insulation and stable operation durability, the field layering injection melting is realized, the inner and outer semiconductors, the insulator and the original cable are combined in a seamless melting mode, no interface exists, and the waterproof performance is good.

Description

Cable structure with repair technology

Technical Field

The utility model relates to the technical field of cables, specifically be a take cable construction of repair technology.

Background

The traditional XLPE insulated cable accessory is a prefabricated accessory which compounds a stress control module and added insulation into an integral structure in a factory, the stress control module adopts a stress cone to regulate and control an electric field, the reinforced insulation mostly adopts silicon rubber or ethylene propylene rubber, the prefabricated accessory is sleeved to a cable connecting position on site, a cable mold injection welding head is used for manufacturing a new continuous equivalent regeneration combined cable on site according to the raw material, the main structure and the specification of the connecting cable according to the cable structure principle, and a cable body is fused and combined to form a shielding body with the characteristics of no stress cone and no movable interface and consistent intrinsic characteristics.

The existing traditional fully prefabricated or cold-shrinkage accessory has the defects that a conductor is crimped by adopting a copper connecting pipe, the oxidized interface of the copper connecting pipe and an original conductor of a cable causes poor tensile mechanical property, the direct current resistance is high, the current carrying capacity is influenced, the field intensity is weakened by an electric field, a movable interface is arranged between the accessory insulation and the cable insulation, the hidden trouble that the cable insulation is retracted to cause the displacement of a connector of an accessory main body exists, in addition, the problem that the interface micro air gap and impurity polarization are easy to generate and partial discharge is generated under the action of the electric field force and a thermal field needs to be solved, the conductor adopts a heat-releasing welding technology, has equal diameter, low resistance, high strength and never aged welding points, is subjected to fault current impact and long-term heavy current operation, is durably and reliably electrically connected, the electrical stability and the operational reliability are improved, and the conductor has higher durability of electrical insulation and operational stability, and the on-site layered injection melting of inner and outer semi-conductors is realized, The cable structure with the repair technology has the advantages of seamless fusion bonding of the insulator and the original cable, no interface and good waterproof performance.

In order to solve the problems, innovation is urgently needed on the basis of the original cable repair technology.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a take repair technology's cable construction, adopt the crimping of copper takeover with the conductor that proposes in solving above-mentioned background art, copper takeover leads to tensile mechanical properties poor with the former conductor oxidation interface of cable, direct current resistance is on the high side, influence current-carrying capacity, electric field weakening field intensity, there is mobile interface between accessory insulation and the cable insulation, there is the cable insulation and contracts the hidden danger that leads to the accessory main part to connect the aversion, very easily take place interface micro air gap under electric field force and thermal field effect in addition, impurity polarization and take place partial discharge's problem.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take repair technology's cable structure, includes that body, former XLPE are insulating to respond to the accuse body with the mould notes, the inside of body is provided with first conductor, and the tip of first conductor is provided with the welding point, the avris of welding point links up the second conductor, and the outside of second conductor is provided with former internal shield to the outside of welding point with be provided with new internal shield, former XLPE is insulating to be set up in former internal shield's the outside, and the insulating avris of former XLPE is provided with newly-increased XLPE and insulating, the insulating outside of newly-increased XLPE is provided with former external shield, and the outside of former external shield is provided with newly-increased external shield, the mould notes are responded to the accuse body and are set up in the insulating tip of newly-increased XLPE.

Preferably, the first conductor is connected to the second conductor by heat radiation welding via a welding point, and the diameter of the welding point is equal to that of the first conductor and that of the second conductor.

Preferably, the new inner shield and the original inner shield are fused and combined through an air-gap-free interface, and the new inner shield and the original inner shield are made of the same semiconductor material.

Preferably, the newly added XLPE insulation and the original XLPE insulation are in fusion bonding without an air gap interface, and the newly added XLPE insulation and the original XLPE insulation are made of the same XLPE material.

Preferably, the original outer shield and the newly added outer shield are in fusion bonding without a gas gap interface, and the original outer shield and the newly added outer shield are made of the same insulating shielding material.

Compared with the prior art, the beneficial effects of the utility model are that: the conductor adopts a heat release welding technology, has equal diameter, low resistance, high strength, never aged welding points, endures fault current impact and long-term heavy current operation, is durably and reliably electrically connected, improves the electrical stability and the operation reliability, has higher electrical insulation and stable operation durability, is layered and injected and melted on site, has no gap melting combination between an inner semi-conductor, an outer semi-conductor and an insulator and the original cable, has no interface, and has good waterproof performance;

1. the conductor adopts a heat release welding technology, the conductor has equal diameter, low resistance and high strength, a welding point is never aged, the conductor is subjected to fault current impact and long-term heavy current operation, and the conductor is durably and reliably electrically connected, the ratio of the breaking force of the welding position of the conductor to the body is 91.2%, and the tensile strength of a conductor joint reaches more than 80% of the strength of the body;

2. the cable injection welding head recovers and manufactures a conductor shielding layer and an insulation shielding layer according to the conductor shielding and outer shielding structure, specification and same material of the original cable, realizes a cable electric field shielding body which is continuously and equivalently matched with the original cable by the cable injection welding head, enables electric field distribution and electric field intensity to be in the best natural state, highlights the electrical stability and the operational reliability of the cable injection welding head, adopts XLPE recovery which is the same as cable insulation, enables the cable injection welding head insulation and the cable insulation to be fused and combined without an air gap interface, structurally forms an integral body which is consistent with the cable without obvious joint characteristics, has the same insulation strength as the original cable, and has higher durability of electrical insulation and operational stability;

3. the copper core welding can bend the cable at the repaired position, the influence caused by cable dragging is not needed to be worried, the on-site layered injection welding is adopted, the inner and outer semiconductors, the insulator and the original cable are seamlessly fused and combined, the interface is avoided, the waterproof performance is good, the requirement on the environment temperature and humidity is not high (higher temperature control is carried out due to the mold core cavity), the manufacturing with the diameter approximately equal to or equal to the outer diameter of the cable is realized, the cable mold injection welding joint can be manufactured at the special position of the cable bending position and high-altitude suspension, and the space for placing is not occupied too much.

Drawings

Fig. 1 is a schematic view of the connection (straight joint) structure of the equal-diameter restoring cable of the present invention;

fig. 2 is a schematic view of the connection (through joint) structure of the thickened insulation recovery cable body of the present invention;

fig. 3 is a schematic view of the connection (insulation joint) structure of the thickened insulation recovery cable body of the present invention;

fig. 4 is a schematic diagram of equipotential line distribution inside the equal-diameter recovery cable of the present invention;

fig. 5 is a schematic view of the electric field distribution inside the equal-diameter restoring cable of the present invention;

fig. 6 is a schematic diagram of equipotential line distribution inside the thickened insulation recovery cable according to the present invention;

fig. 7 is the utility model discloses an inside electric field distribution schematic diagram of bodiness insulation recovery cable.

In the figure: 1. a body; 2. a first conductor; 3. a welding point; 4. a second conductor; 5. original inner shielding; 6. new inner shielding; 7. insulating original XLPE; 8. adding XLPE insulation; 9. original external shielding; 10. newly adding an outer shield; 11. and (4) molding the stress control body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a cable structure with repair technology comprises a body 1, a first conductor 2, a welding point 3, a second conductor 4, an original inner shield 5, a new inner shield 6, an original XLPE insulation 7, a new XLPE insulation 8, an original outer shield 9, a new outer shield 10 and a mold injection response control body 11, wherein the first conductor 2 is arranged inside the body 1, and the end of the first conductor 2 is provided with a welding point 3, the side of the welding point 3 is connected with a second conductor 4, the outer side of the second conductor 4 is provided with an original inner shield 5, and the outer side of the welding point 3 is provided with a new inner shield 6, the original XLPE insulation 7 is arranged on the outer side of the original inner shield 5, and the side of the original XLPE insulation 7 is provided with a new XLPE insulation 8, the outer side of the new XLPE insulation 8 is provided with an original outer shield 9, a new outer shield 10 is arranged on the outer side of the original outer shield 9, and a mold injection response control body 11 is arranged at the end part of the new XLPE insulation 8;

furthermore, the first conductor 2 and the second conductor 4 form heat-release welding connection through the welding point 3, the diameter of the welding point 3, the first conductor 2 and the diameter of the second conductor 4 are equal, the heat-release welding technology is adopted, the conductors are equal in diameter, low in resistance and high in strength, the welding point 3 is never aged, and the heat-release welding connection can withstand fault current impact and long-term heavy current operation, is in durable and reliable electrical connection, the copper core is welded, a cable at a repair position can be bent, and the influence caused by cable dragging is not needed to worry;

furthermore, the new inner shield 6 and the original inner shield 5 are in fusion bonding without a gap interface, the new inner shield 6 and the original inner shield 5 are made of the same semiconductor material, and the materials are layered and injected on site, and the inner and outer semiconductors, the insulator and the original cable are in seamless fusion bonding without an interface, so that the waterproof performance is good;

furthermore, the newly added XLPE insulation 8 and the original XLPE insulation 7 are fused and combined through an air-gap-free interface, the newly added XLPE insulation 8 and the original XLPE insulation 7 are made of the same XLPE material, the XLPE material which is the same as the cable insulation is adopted for recovery, the cable mold injection welding head insulation and the cable insulation are fused and combined through air-gap-free, the two form an insulator with the same intrinsic characteristic, the insulation strength is consistent with that of the original cable, and the cable insulation have higher electrical insulation and stable operation durability;

furthermore, the original outer shield 9 and the newly added outer shield 10 are fused and combined through an air-gap-free interface, the original outer shield 9 and the newly added outer shield 10 are made of the same insulating shield material, and the conductor shield layer and the insulating shield layer are restored and manufactured according to the conductor shield and the outer shield structure, specifications and the same material of the original cable, so that a cable electric field shield body with the cable injection welding head and the original cable matched continuously and equivalently is realized, the electric field distribution and the electric field intensity are in the best natural state, and the electric stability and the operation reliability of the cable injection welding head are highlighted.

The working principle is as follows: in the process of repairing and connecting a cable, a user adopts a heat release welding technology for the conductor, the conductor has equal diameter, low resistance and high strength, a welding point 3 is never aged, the conductor is subjected to fault current impact and long-term large-current operation, the durable and reliable electrical connection is realized, the copper core is welded, the cable at the repaired position can be bent, the influence caused by cable dragging is not needed to be worried, the field layered injection melting is realized, the inner and outer semiconductors, the insulator and the original cable are in seamless fusion bonding and have no interface, the waterproof performance is good, the XLPE material which is the same as the cable insulation is adopted for recovery, the cable injection welding head insulation and the cable insulation are in seamless fusion bonding, the two form the insulator with the same intrinsic characteristic, the insulation strength is consistent with the original cable, and the durability of higher electrical insulation and stable operation is realized;

the cable injection welding head isometric recovery cable has the internal equipotential line distribution: the cable injection welding head is connected with the equivalent recovery cable body 1 without a stress cone and a movable interface, after the cable injection welding head is connected with the cable insulation in an equal-diameter recovery mode, the stress cone is not needed to regulate and control the electric field stress of the cable, the distribution of the equipotential lines is consistent with the electric performance form of the cable body 1, the cable accessory cannot realize the natural equipotential line distribution rule of the cable body 1, the cable injection welding head and the cable body 1 have the same equipotential line distribution form, and the cable injection welding head is equal to the electric performance trend of the cable in natural and stable electric field distribution.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a take cable structure of repair technique, includes that body (1), former XLPE are insulating (7) and the mould notes response accuse body (11), its characterized in that: the inside of body (1) is provided with first conductor (2), and the tip of first conductor (2) is provided with welding point (3), the avris of welding point (3) has linked up second conductor (4), and the outside of second conductor (4) is provided with former internal shield (5) to the outside of welding point (3) with be provided with new internal shield (6), former XLPE is insulating (7) to be set up in the outside of former internal shield (5), and the avris of former XLPE insulating (7) is provided with newly-increased XLPE insulating (8), the outside of newly-increased XLPE insulating (8) is provided with former external shield (9), and the outside of former external shield (9) is provided with newly-increased external shield (10), the mould is annotated and is responded to accuse body (11) and is set up in the tip of newly-increased XLPE insulating (8).

2. A cable construction with repair technique according to claim 1, characterized in that: the first conductor (2) is connected with the second conductor (4) in a heat-releasing welding mode through the welding point (3), and the diameters of the welding point (3), the first conductor (2) and the second conductor (4) are equal in diameter.

3. A cable construction with repair technique according to claim 1, characterized in that: the new inner shield (6) and the original inner shield (5) are in fusion bonding without an air gap interface, and the new inner shield (6) and the original inner shield (5) are made of the same semiconductor material.

4. A cable construction with repair technique according to claim 1, characterized in that: the newly added XLPE insulation (8) and the original XLPE insulation (7) are in fusion bonding without an air gap interface, and the newly added XLPE insulation (8) and the original XLPE insulation (7) are made of the same XLPE material.

5. A cable construction with repair technique according to claim 1, characterized in that: the original outer shield (9) and the newly added outer shield (10) are in fusion bonding through an air-gap-free interface, and the original outer shield (9) and the newly added outer shield (10) are made of the same insulating shielding material.