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Cable and feed body connecting method suitable for deep well type grounding electrode

A connection method and grounding electrode technology, which can be used in connection, dust/splash/leakage/waterproof/fireproof connection, connection contact material, etc., can solve problems such as protection failure, avoid deformation, reduce welding The effect of medicinal doses

Inactive Publication Date: 2019-08-02
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for connecting cables and power feeders suitable for deep well type grounding electrodes, in order to solve the technical problem that the traditional grounding electrode connection method causes protection failure on the connection of deep well electrodes, so that the cables and the feeder are connected through metal hoops. The feed body is welded and encapsulated by adding a lead seal layer and epoxy resin to prevent the solder joints from being affected by the corrosive products of the electrodes, and to prevent the solder joints from directly participating in the electrochemical reaction to achieve a protective function

Method used

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  • Cable and feed body connecting method suitable for deep well type grounding electrode
  • Cable and feed body connecting method suitable for deep well type grounding electrode
  • Cable and feed body connecting method suitable for deep well type grounding electrode

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Embodiment 1

[0032] Please refer to Figure 1-Figure 4 , the preferred embodiment of the present invention provides a method for connecting cables and power feeders suitable for deep well type grounding electrodes, including:

[0033] S1, set multiple feed points on the ground electrode feed body to connect with cables respectively;

[0034] The deep well electrode is mainly composed of feeder, coke filler and wall casing, and the diversion cable is vertically installed in the coke filling layer to connect the diversion center busbar and the electrode feeder. In order to ensure the reliability of current injection, the way of cable independent conduction is usually adopted, that is, independent conduction cables are connected to different depth positions of the feed body in the effective electrode section.

[0035] In view of the current drilling technology and capabilities, the drilling machine that is more suitable for the electrode depth requirements is the roller cone drilling machine...

Embodiment 2

[0042] Please refer to Figure 5 , on the basis of the first embodiment above, further comprising: S5, after pouring is completed, the setting mold used when filling the epoxy resin is lowered and installed together, so that a filling mold layer is formed on the surface of the epoxy resin layer. In this embodiment, the material of the filling mold layer is fiberboard. In this embodiment, the gap between the filling mold layer and the power feeder is sealed by wrapping waterproof tape.

[0043]The epoxy resin layer is easy to be damaged and cracked during the construction process. Therefore, after the pouring is completed, the shaping mold used for filling the resin should be lowered and installed together. The epoxy resin mold should be made of tough pressure-resistant materials, such as fiberboard, which can increase the environmental The compressive capacity of the epoxy resin layer. The gap between the mold and the feeder steel pipe is wound and sealed with waterproof tap...

Embodiment 3

[0045] Please refer to Figure 6-Figure 7 , on the basis of the second embodiment above, the metal hoop member further includes a second side opening, the second side opening is opposite to the first side opening, and the second side opening is opposite to the first side opening. The feed body is welded. In this embodiment, the thickness of the wall of the metal hoop where the cable welding hole is located is greater than the thickness of the rest of the wall.

[0046] Three openings are arranged on the cylinder of the copper piece. Two of the side openings can be exothermicly welded with the feed body, which is used to increase the reliability of the electrical connection between the copper parts and the power feed body; the "line-surface exothermic welding" is adopted between the diversion cable and the customized copper parts, and its The wall thickness of the copper parts used for exothermic welding is thicker, which can increase the allowable carrying capacity of the cu...

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Abstract

The invention discloses a cable and feed body connecting method suitable for a deep well type grounding electrode. The method comprises that feed points in a feed body of the grounding electrode are connected with a cable; each feed point is welded to the feed body and the cable via a metal holt hoop iron member; each holt hoop iron member tightly sleeves the feed point of the feed body; the holthoop iron member comprises a first side surface hole and a cable welding hole; the first side surface hole is welded to the feed body, and the cable welding hole is welded to the cable; lead is castedto wrap conductors on all feed connecting points, so that a lead sealing layer is formed in the surface of the metal holt hoop iron members and the feed points; and epoxy resin is poured on the surface of the lead sealing layer to carry out packaging, and an epoxy resin layer is formed for protection. The cable is welded to the feed body via the metal holt hoop iron members, the lead sealing layer and epoxy resin are added for packaging, and on the premise that the connecting reliability is ensured, welding points are avoided from influence by an electrode corroded product and direct participation in electrochemical reaction, and protection is realized.

Description

technical field [0001] The invention relates to the field of grounding electrodes, in particular to a method for connecting cables and power feeders suitable for deep well type grounding electrodes. Background technique [0002] The current high-voltage DC grounding pole generally adopts a horizontal shallow buried grounding pole, which occupies a large area. The receiving end of the DC transmission is often located in an economically developed area, which makes it difficult to select the location of the grounding pole. At present, China Southern Power Grid is trying to develop from the traditional horizontal shallow buried grounding electrode to vertical or deep well type grounding electrode. Among them, the deep-well type grounding electrode has a large depth, requires a small number of electrodes, occupies a small construction area, and usually has the smallest grounding resistance and maximum ground potential rise, so it has the least impact on the surrounding facilities...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R43/02H01R43/00H01R4/66
CPCH01R4/66H01R43/00H01R43/005H01R43/02H01R43/0249
Inventor 谌阳孔志达简翔浩谭威曾永胜刘玉蔡汉生胡上茂
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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