CN201549365U

CN201549365U - Current transformer

Info

Publication number: CN201549365U
Application number: CN200920312508XU
Authority: CN
Inventors: 李冬焱
Original assignee: Pinggao Group Co Ltd
Current assignee: Henan high General Electric Co., Ltd.
Priority date: 2009-10-14
Filing date: 2009-10-14
Publication date: 2010-08-11
Anticipated expiration: 2019-10-14

Abstract

The utility model discloses a current transformer, including a body and a subbase assembly, the bottom of the body is provided with a basin type insulator in a buckled mode, the top cap of a closing-in end of the basin type insulator is provided with a shielding cover, the center of the shielding cover is provided with a plug jack, the lower end of a grounding tube is arranged on a subbase of the subbase assembly, the upper end of the grounding tube is inserted in the plug jack of the shielding cover in an coaxial mode, the diameter of the plug jack of the shielding cover is identical to that of the inner bore of the closing-in end of the basin type insulator, the upper end of the grounding tube is covered with a connecting disk, the grounding tube is inserted into the plug jack of the shielding cover through the connecting disk, when the current transformator is assembled, the upper end of the grounding tube may be inserted into the plug jack of the shielding cover along the inner wall of the basin type insulator directly by guiding function of the basin type insulator. The utility model has advantages of convenient assembly, reducing labor strength, and improving working efficiency.

Description

A kind of current transformer

Technical field

The utility model relates to the high-tension transformation equipment field of electric power system, is specifically related to a kind of current transformer.

Background technology

Current transformer in the high-tension transformation equipment of electric power system is the output equipment of electric power system electric energy metrical and relay protection signal, and the version of current transformer is according to different performance requirements and different.Fig. 1, current transformer shown in Figure 2, it is assembled by device body 1 and base assembly, base assembly comprises silicone rubber sleeve 2, high potential screen 3, intermediate potential screen 4, ground pipe 5 and base 6, ground pipe 5 is connected on the base 6, ground pipe 5 outsides are intermediate potential screen 4, intermediate potential screen 4 outsides are high potential screen 3, ground pipe 5, form the shielding of multilayer coaxial cylindrical between intermediate potential screen 4 and the high potential screen 3, add cover one silicone rubber sleeve 2 in high potential screen 3 outsides, current transformer topmost is a device body 1, device body 1 is by housing 10, contact tube 11, inner barrel 12, radome 7 and disc insulator 8 constitute, disc insulator 8 spiral-locks are in the bottom of device body 1, disc insulator 8 closes up and holds top cover to establish radome 7, and the center of radome 7 has jack.When the general assembly current transformer, need the upper end concentric of ground pipe 5 is inserted in the jack of radome 7, because ground pipe 5 external diameters are little but length is longer, its perpendicularity guarantees that in the course of processing high accuracy has certain difficulty, the external diameter of adding ground pipe 5 equals the diameter of radome 7 jacks, but diameter less than disc insulator 8 closing in end endoporus, and this current transformer is to adopt vertical assembling when general assembly, so when assembling, because ground pipe, cooperation between this three of radome and disc insulator is unfavorable, ground pipe 5 upper ends are difficult to insert in the jack of radome 7, thereby cause working strength of workers big, and operating efficiency is low.

Summary of the invention

The purpose of this utility model provides a kind of current transformer, to be difficult to insert the problem in the radome jack on the solution ground pipe.

In order to realize above purpose, the technical scheme that the utility model adopted is:

A kind of current transformer, comprise device body and base assembly, the bottom spiral-lock of device body has disc insulator, the top cover of disc insulator closing in end is provided with radome, the center of radome has jack, the lower end of ground pipe is assemblied on the base of base assembly, the upper end concentric of ground pipe is inserted in the jack of radome, the diameter of radome jack closes up with disc insulator and holds the diameter of endoporus identical, the upper end outer cover of described ground pipe is provided with a terminal pad, and ground pipe passes through the terminal pad inserting in the jack of radome.

Terminal pad is fixedlyed connected with the upper end of ground pipe by welding and is integral.

The utility model is changed system into the diameter of radome jack identical with the diameter of disc insulator closing in end endoporus, and at the outside sheathed terminal pad in the upper end of ground pipe, ground pipe passes through this terminal pad inserting in the jack of radome then.After the improvement, when the general assembly current transformer, adopt vertical assembling, utilize the guide effect of disc insulator, the terminal pad of ground pipe upper end can directly insert along the inwall of disc insulator in the radome jack, assembles very convenient.The utility model greatly reduces working strength of workers, has improved operating efficiency, has also saved product cost, for enterprise has created good economic benefit.

Description of drawings

Fig. 1 is the structural representation of existing current transformer;

Fig. 2 is the structural representation of coupling part, ground pipe upper end among Fig. 1;

Fig. 3 is the structural representation of coupling part, ground pipe upper end in the utility model.

Embodiment

The utility model is the improvement to existing current transformer, and improvement is the structure of the coupling part of ground pipe upper end, and the structure of the coupling part, ground pipe upper end after the improvement as shown in Figure 3.The current transformer that the utility model provides comprises device body and base assembly, the bottom spiral-lock of device body has disc insulator 8, the top cover that disc insulator 8 closes up end is provided with radome 13, the center of radome 13 has jack, the lower end of ground pipe 5 is fixedly connected on the base of base assembly, the upper end concentric of ground pipe 5 is inserted in the jack of radome 13, the jack diameter of radome 13 closes up with disc insulator 8 and holds diameter of bore identical, welds the terminal pad 9 that an external diameter equals disc insulator 8 closing in end diameter of bores in ground pipe 5 upper ends.When the general assembly current transformer, utilize the guide effect of disc insulator 8, with the terminal pad 9 of ground pipe 5 upper ends along the direct inserting of the inwall of disc insulator 8 in the jack of radome 13.Easy to assembly, reduced working strength of workers, improved operating efficiency.

Claims

1. current transformer, comprise device body and base assembly, the bottom spiral-lock of device body has disc insulator, the top cover of disc insulator closing in end is provided with radome, the center of radome has jack, the base of base assembly is provided with ground pipe, the upper end concentric of ground pipe is inserted in the jack of radome, it is characterized in that, the diameter of radome jack closes up with disc insulator and holds the diameter of endoporus identical, the upper end outer cover of described ground pipe is provided with a terminal pad, and ground pipe passes through the terminal pad inserting in the jack of radome.

2. current transformer according to claim 1 is characterized in that, terminal pad is fixedlyed connected with the upper end of ground pipe by welding and is integral.