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A cable wrapping intermediate joint and a manufacturing process thereof

A technology for intermediate joints and cables, applied in cable joints, equipment for connecting/terminating cables, etc., can solve problems such as affecting the high-voltage shielding contact of the cable conductor core, thermal breakdown at the high-voltage shielding electrode, affecting the safety and stability of the cable, etc. , to achieve the effect of long-term safe operation, not easy to breakdown, and high waterproof sealing performance

Pending Publication Date: 2019-01-18
SHANGHAI G&W ELECTRIC LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although silicone grease can enhance the insulation capacity of the interface, it also affects the contact between the cable conductor core and the high-voltage shield of the prefabricated intermediate joint. Due to poor contact, it is easy to generate heat, which may cause thermal breakdown at the high-voltage shield electrode
[0014] To sum up, no matter what method, in the prior art, the cable intermediate joint and its manufacturing process are not perfect, mainly in the relatively complex structure, conductor core connection, main insulation interface sealing, and mechanical strength. There are certain defects that affect the safety and stability of cable operation

Method used

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  • A cable wrapping intermediate joint and a manufacturing process thereof
  • A cable wrapping intermediate joint and a manufacturing process thereof
  • A cable wrapping intermediate joint and a manufacturing process thereof

Examples

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Effect test

Embodiment

[0091] The utility model relates to a cable wrapping intermediate joint, which is used for the butt joint of two sections of cables.

[0092] Such as figure 1 Schematic diagram of the three-core cable structure in the prior art, figure 2 The connection diagram of two same-phase single-phase cables is as follows:

[0093] The three-core cable in the prior art includes a sheath 11, armor 12, liner 13 from the outside to the inside, and the liner 13 includes three strands of single-phase cables, such as figure 1 Three strands of single-phase cables A, B, and C shown in ; each single-phase cable includes a metal shielding layer 14, an insulating shielding layer 15, a main insulating layer 16, an inner shielding layer (not shown in the figure) and a conductor from outside to inside Core 17.

[0094] Wrapped intermediate joints include joint wraps connecting the same-phase single-phase cables, and protective wraps outside the same-phase single-phase cable joint wraps.

[0095] ...

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PUM

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Abstract

The invention provides a cable wrapping intermediate joint and a manufacturing process thereof, which are used for butt joint of two sections of three-core or single-core cables. The wrapping intermediate joint includes the connector wrapping connecting each single-phase cable, and the protective wrapping all the connectors; A tap wrap includes a pressure nozzle connected with a conductor core ofthat same-phase cable, a stress cone sleeved on the cable, a wound limiting step, a semi-conductive tape layer, an insulating tape layer, a tap shield layer, a copper mesh layer, a single-phase cablemetal shield tape, a PVC layer and a single-phase cable waterproof layer; The protective wrapping package comprises a binding layer, a cable metal shielding tape, a cable waterproof layer and a cablearmor layer from the inside to the outside. The winding intermediate joint of the invention can achieve the purposes of good connection, reliable insulation, good sealing performance, high mechanicalstrength, simple structure and convenient fabrication and installation of the conductor core of the cable, can ensure the safety and stability of the cable operation and obtain good economic benefits, and therefore has great popularization and application value.

Description

technical field [0001] The invention relates to a cable accessory and a manufacturing process thereof, in particular to a cable wrapping intermediate joint and a manufacturing process thereof, belonging to the technical field of cable accessory manufacturing. Background technique [0002] The cable is the bridge between the power supply equipment and the electrical equipment, plays the role of transmitting electric power, and is widely used. Modern life and production are inseparable from electricity, therefore, cables are also inseparable. With the widespread use of cables, the number and quality of cable accessories required are also increasing. [0003] During the cable laying process, when the length of the cable is less than the laying length, it is necessary to connect two or more sections of cables so that the conductor cores of the cables are connected to form a continuous cable. The joints connected by cables must have certain insulation and sealing properties, co...

Claims

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Application Information

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IPC IPC(8): H02G15/18H02G1/14
CPCH02G1/14H02G15/18
Inventor 郑绍俊赵德康尹超
Owner SHANGHAI G&W ELECTRIC LTD
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