CN-224204726-U - Bus connecting device and cabinet combining structure

CN224204726UCN 224204726 UCN224204726 UCN 224204726UCN-224204726-U

Abstract

The utility model relates to the technical field of structural design of power equipment, in particular to a bus connecting device and a cabinet combining structure, wherein the bus connecting device comprises buses used for being connected with outlet terminals of two adjacent inflatable cabinets and bus cylinders used for being respectively sleeved outside the outlet terminals of the two adjacent inflatable cabinets, current transformers are arranged outside the buses, the current transformers are positioned between the bus cylinders at two sides and are in plug-in sealing assembly with the bus cylinders at two ends of the current transformers, measuring coils are cast in the current transformers, the current transformers and the buses are integrally molded through casting, the space interval between the current transformers and the buses is eliminated, the current transformers do not have play in the up-down direction under the condition that vibration is generated when the inflatable cabinets are switched on and off, the sealing insulation effect of plug-in sealing assembly positions of the current transformers and the bus cylinders at two sides is good, and insulating gas leakage is avoided.

Inventors

TANG QINGSHUANG
Wang Shuaipu
YAN MENG
YU MENG
LI MENG
WANG ZONGJIE
KANG ZAIQIANG
LIU XINLING
NIU YINGKAI
HUANG YONG

Assignees

许继德理施尔电气有限公司

Dates

Publication Date: 20260505
Application Date: 20250512

Claims (10)

1. The bus connecting device comprises buses used for being connected with outlet terminals of two adjacent inflatable cabinets and bus cylinders used for being respectively sleeved outside the outlet terminals of the two adjacent inflatable cabinets, current transformers are arranged outside the buses, the current transformers are arranged between the bus cylinders on two sides and are in plug-in sealing assembly with the bus cylinders on two sides, measuring coils are cast in the current transformers, and the bus connecting device is characterized in that the current transformers and the buses are integrally formed through casting.
2. The bus bar connecting device according to claim 1, wherein annular shielding pits are arranged at the positions where the two axial ends of the current transformer are connected with the bus bar.
3. The bus bar connecting device of claim 2 wherein the annular shield pit is an annular groove having a groove bottom wall and a groove side wall.
4. The bus bar connecting device according to claim 3, wherein the side walls of the annular grooves at the two ends are respectively smoothly transited with the axial end face of the current transformer.
5. The bus bar connecting apparatus according to any one of claims 1 to 4, wherein the current transformer comprises a cylindrical body portion and insertion portions extending outwardly from both ends of the cylindrical body portion for insertion into the corresponding bus bar cylinders, and step structures for stopping the ends of the corresponding bus bar cylinders are formed between the insertion portions and the cylindrical body portion.
6. The bus bar connecting device according to claim 5, wherein one of the two end step structures is provided with a measuring coil terminal connected to the measuring coil.
7. The bus bar connecting device according to claim 6, wherein a protective coil is cast inside the current transformer, and a protective coil binding post connected with the protective coil is further arranged on the step structure provided with the measuring coil binding post.
8. The bus bar connecting device according to any one of claims 1 to 4, wherein a protective coil is cast inside the current transformer, and a measuring coil terminal connected to the measuring coil and a protective coil terminal connected to the protective coil are provided on the surface of the current transformer.
9. The bus bar connecting device according to claim 5, wherein a seal groove for mounting a seal ring is provided on an outer peripheral surface of the plug portion.
10. A cabinet combining structure comprises two inflatable cabinets which are arranged side by side, an outlet terminal is arranged above the inflatable cabinets, and a bus connecting device is further included, and is characterized in that the bus connecting device is according to any one of claims 1-9.

Description

Bus connecting device and cabinet combining structure Technical Field The utility model belongs to the technical field of structural design of power equipment, and particularly relates to a bus connecting device and a cabinet combining structure. Background Along with the development of the power industry, the inflatable cabinet is widely applied in the power field due to the characteristics of high reliability, full working condition, no maintenance and the like, insulating mediums such as SF 6 or N 2 are filled in the inflatable cabinet, the cabinet combination is often needed in practice, the conductive loops of two cabinet bodies between two adjacent inflatable cabinets are connected through an insulating bus, and a current transformer is additionally arranged on the insulating bus generally so as to monitor the bus current in real time, thereby providing necessary protection for electrical equipment. However, if the current transformer is additionally arranged at the bus of the cabinet, the current transformer needs to be arranged outside the inflatable cabinet, and the external diameter of the current transformer is quite large, so that the cost of the current transformer is high, and the current transformer is contrary to the miniaturized design of the inflatable cabinet and is not suitable for the technical development trend of the current inflatable cabinet. Based on the above, the invention patent application with the application publication number of CN118920284A discloses a bus connecting device and a cabinet combining structure, wherein the bus connecting device comprises a bus connected with outlet terminals of two adjacent inflatable cabinets and a bus cylinder sleeved on the outlet terminals of the inflatable cabinets, a current transformer is sleeved outside the bus, two ends of the current transformer are assembled with the bus cylinders on two sides in a sealing way, the bus cylinder and the current transformer enclose a sealing chamber for filling insulating gas, two ends of the current transformer can be assembled with the bus cylinders on two sides in a sealing way respectively, an independent sealing chamber is created, the bus used for the cabinet combining is completely contained in the inner space of the sealing chamber, and a reliable and stable insulating environment can be provided for the bus only by filling the insulating gas in the sealing chamber, so that the performance and the operation reliability of a cabinet combining product are effectively ensured. But current transformer only overlaps and establishes outside the generating line and peg graft sealed assembly with the sealed section of thick bamboo of both sides in above-mentioned generating line connecting device, current transformer and generating line interval set up, current transformer seals through the sealing washer with the sealed section of thick bamboo inner wall assembly of generating line, because current transformer dead weight is great, can lead to the sealing washer lower part to receive the extrusion degree and be greater than sealing washer upper portion, the sealing washer is inconsistent in the ascending extrusion degree of circumferencial direction, make sealed inhomogeneous, there is the leakage risk, especially when the condition that the inflation cabinet produced vibration in the divide-shut brake in-process, current transformer has the drunkenness in upper and lower direction, make current transformer and the sealed assembly department of generating line section of thick bamboo grafting of both sides seal be sealed not tight more easily, lead to insulating gas leakage, make insulating effect poor. Disclosure of utility model The utility model aims to provide a bus connecting device, which solves the technical problem that when a current transformer in the current bus connecting device is in plug-in sealing and sealing with bus barrels on two sides, sealing is uneven in the circumferential direction of the current transformer due to self weight of the current transformer, so that sealing assembly parts of the current transformer and the bus barrels on two sides are easy to seal and are not tight under the condition that the current transformer vibrates in the switching-on and switching-off process of an inflatable cabinet, and insulating gas is leaked. Another object of the present utility model is to provide a cabinet combination structure including the bus bar connecting device. In order to achieve the above purpose, the technical scheme of the bus connecting device of the utility model is as follows: The bus connecting device comprises buses used for being connected with the outgoing line terminals of two adjacent inflatable cabinets and bus barrels used for being respectively sleeved outside the outgoing line terminals of the two adjacent inflatable cabinets, current transformers are arranged outside the buses, the current transformers are located between the bus barrels on two sides and are