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High-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method

A high-voltage cable and live repair technology, which is applied in the direction of conductive connection, electrical component connection, overhead line/cable equipment, etc., can solve problems such as cable discharge and arc, and achieve the effect of avoiding burns

Pending Publication Date: 2018-05-08
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a live repair device and a live repair method for the grounding wire of a high-voltage cable joint, so as to solve the problem of a discharge arc occurring when the cable is directly grounded in the existing live repair operation of a high-voltage cable

Method used

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  • High-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method
  • High-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method
  • High-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Such as Figure 1-Figure 7 As shown, the high-voltage cable joint grounding wire live repair device of the present invention includes a grounding acupuncture device 1, and the driving device of the grounding acupuncture device 1 drives the needle 5 located at the driving part 4 to move toward the clamping part 2. A grounding system is provided between the needle 5 and the ground, and the grounding system includes a digital display resistance-capacitance voltage divider 6, a high-voltage vacuum contactor 7 and a connecting wire 8, and one end of the voltage divider 6 and the contactor 7 are connected in parallel. It is electrically connected with the needle 5 through the connecting wire 8, and its other end is grounded; on the grounding acupuncture device 1, an end away from the needle 5 is provided with an insulating rod 10, the axis of the insulating rod 10 is parallel to the axis of the needle 5, and its one end is connected to the needle 5. The hydraulic cavity 3 is ...

Embodiment 2

[0082] This embodiment is based on the first embodiment, and further describes the grounded needling device 1 and its clamping portion 2 .

[0083] Such as Figure 1-Figure 7 As shown in the present invention, the high-voltage cable joint ground wire live repair device, the ground acupuncture device 1 is a hydraulic pliers, the driving part 4 is the piston of the hydraulic pliers, the clamping part 2 is a hook, the The piercing needle 5 is installed on the piston of the hydraulic pliers, and the needle point of the piercing needle 5 faces the inner concave surface of the crotch.

[0084] The hook is used as the clamping part 2, which is convenient for the grounding operation of the cable 20. The present invention can be directly hung on the cable 20 through the hook to improve the convenience of the operation of the present invention, and the clamp can be clamped without accurately positioning the cable 20. The holding part fixes the cable 20.

[0085] Further, a locking gro...

Embodiment 3

[0090] This embodiment is based on Embodiment 1, and further explains the installation of the puncture needle 5 .

[0091] Such as Figure 1-Figure 7 As shown in the present invention, the high-voltage cable joint ground wire live repair device is provided with a fixed table 9 between the needle 5 and the driving part 4, one end of the fixed table 9 is connected to the driving part 4, and the other end of the fixed table 9 An installation hole 11 is provided, and one end of the needle 5 is inserted into the installation hole 11, and a through hole communicating with the installation hole 11 is provided on the side wall of the fixed table 9, and one end of the connecting wire 8 away from the voltage divider 6 Inserted into the through hole, and the core wire of the connecting wire 8 is welded or contacted with the needle 5 .

[0092] The needle 5 is fixed on the driving part 4 through the fixing table 9, which facilitates the removal and installation of the needle 5.

[0093]...

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Abstract

The invention discloses a high-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method. The high-voltage cable joint ground wire live-line restoration apparatus includes a grounding needling device, wherein a drive unit of the grounding needling device drives a needle at needles at the drive part of the grounding needling device to move to a clamping part of the grounding needling device; a grounding system is arranged between the needle and the ground; the grounding system includes a digital display capacitance-resistance divider, a high-voltage vacuumcontactor and a connecting wire; after the divider and the contactor are connected in parallel, one end of the grounding needling device is electrically connected with the needle through the connecting wire, and the other end of the grounding needling device is grounded; an insulating bar is arranged at one end, far away from the needle, on the grounding needling device; and the axis of the insulating bar is parallel to the axis of the needle, and one end of the insulating bar is connected with a hydraulic cavity. The high-voltage cable joint ground wire live-line restoration apparatus and live-line restoration method can realize cable joint ground wire live-line restoration, can avoid economic loss caused by power-off restoration, can overcome the harm and hidden trouble of discharge arcwhich appears during the grounding process, can avoid burning operators and related equipment and avoid occurrence of fire, and can also monitor the voltage to ground value of the coaxial ground cables in real time so as to guarantee safety of the work staff.

Description

technical field [0001] The invention relates to the field of cables, in particular to a live repair device and a live repair method for a grounding wire of a high-voltage cable joint. Background technique [0002] The metal sheath of domestic 110kV and 220kV single-core cables generally adopts the operation mode of cross-connected double-end grounding or single-end grounding. Under normal circumstances, the metal sheath of the cable has only tens of volts of induced voltage to the ground, but once the grounding system is damaged, the voltage of the metal sheath to the ground will rise to a very dangerous value. Excessive induced voltage will not only endanger personal safety, but also cause insulation layer breakdown, and even breakdown the outer sheath insulation or cause cable line operation accidents. [0003] When the high-voltage cable crossover wire is stolen and the outer sheath completely loses grounding, the floating voltage on the cable metal sheath will rise abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R11/14H01R11/20H01R43/01H02G1/02
CPCH01R11/14H01R11/20H01R43/01H02G1/02
Inventor 罗远安杜颢马果向泽杨永鹏苟杨郭宇航李果辜鸣明王少清李雁池
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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