CN103151753B - A kind of bus tie - Google Patents

Abstract

A busbar connector, comprising two symmetrical female connecting seats, left and right air box mounting plates connecting the female connecting seats, a sealing gasket arranged between the two female connecting seats, and a conductive inner core connecting the two female connecting seats; The female connecting seat includes an integrally formed inner conductive part, an insulating layer and a shielding cover; the shielding cover is a ring body fitted on the insulating layer, including a conductive ring and an aluminum ring embedded in the conductive ring. The busbar connector of the present invention, through the integrally formed shielding cover with an aluminum ring on the female connecting seat, can realize quick installation and cooperation with the gas box mounting plate, without the need for fixed inserts, thus simplifying the difficulty of installation; in addition, the female connecting seat Adding a shielding cover inside and passing through the gasket can cancel the use of special female connectors. The shielding cover shields the area where the electric field of the busbar of the inflatable cabinet is relatively concentrated, improving the electrical performance of the inflatable cabinet. It is not only safe, convenient and reliable, but also greatly reduces the number of busbars Connection cost loss.

Description

A bus connector

technical field

The invention relates to the technical field of power transmission and distribution switchgear manufacturing, in particular to a busbar connector used for busbar expansion of medium-voltage switchgear.

Background technique

Gas-insulated switchgear is the most widely used switchgear in the current medium-voltage power transmission and distribution system, especially as an urban network transformation and user power distribution equipment control ring network cabinet is extremely widely used, the quality of the product is directly related to to the safety and reliability of the transmission system. The gas insulated switchgear currently on the market is generally divided into two categories: one uses sulfur hexafluoride gas as the insulating medium; the other uses environmentally friendly gases as the insulating medium (for example, dry air, nitrogen, etc.) . For switchgear with gas as the insulating medium, the sealing of insulating gas is a key technology that affects product performance. Naturally, the busbar used for product expansion also needs to be sealed, so the use of special busbar connectors is a matter of course.

The general practice of existing products on the market is to use epoxy resin to press and fix the conductive copper parts and inject brass inserts into separate female connectors. Depending on the brass inserts on the female connectors, bolts and other fixing parts can be used The female connector is fixedly installed on the gas box mounting plate of the gas insulated switchgear, and then the left and right female connectors are connected through another female connector to achieve the communication between the busbars of the switchgear. Since the female connecting seat is installed on the air box mounting plate, and the mounting plate is basically made of metal plate, when the left and right female connecting seats are connected with the female connector in the middle, there is a "pass" between the female connector and the mounting plate. If the problem of "passing the board" is not dealt with electrically, it will easily cause the problem of local electric field concentration, which will affect the electrical performance of the product.

Fig. 5 shows the bus bar connection method in the prior art. Its structure is relatively complicated. The insert b for fixed installation is provided on the bus connecting seat a, which is fixed on the left and right mounting plates d of the gas box by bolts c and other fixing parts, and the left and right bus bars Connecting seat a needs to be equipped with a female connector e. The female connector e is generally made of insulating glue and is divided into three layers, namely, the inner conductive layer e1, the middle insulating layer e2 and the outer conductive layer e3, and the left and right bus connectors The sealing and insulation of the device e is realized by the middle insulating layer e2, and the outer conductive layer e3 shields the above-mentioned "passing board" area. The female connector e is a hollow structure, and a connecting contact f with certain elasticity is installed in the middle. f makes the left and right female connectors a connected, and the conductive layer e1 in the female connector e performs voltage equalization and shielding on the sharp corners of the connecting contacts f. reliability. When in use, the outer conductive layer e3 is grounded, and the "over-board" area is shielded, thereby improving the problem of electric field concentration. Therefore, the existing design structure not only makes the busbar connection very complicated, but also the cost is relatively high, and the quality of the product is limited by the quality of the female connector, which adds unnecessary safety hazards to the product.

Contents of the invention

The purpose of the present invention is to provide a bus connector that can simplify the busbar connection of the switchgear, reduce the cost of the busbar connection, and at the same time shield the area where the electric field concentration is likely to occur, so as to ensure the safe and reliable operation of the switchgear.

To achieve the above object, the solution of the present invention is:

A busbar connector, comprising two symmetrical female connecting seats, left and right air box mounting plates connecting the female connecting seats, a sealing gasket arranged between the two female connecting seats, and a conductive inner core connecting the two female connecting seats; The female connection seat includes an integrally formed inner conductive part, an insulating layer and a shielding cover; the shielding cover is a ring body fitted on the insulating layer, which includes a conductive ring and an aluminum ring embedded in the conductive ring.

A groove matching the conductive inner core is formed on the inner side of the inner conductive part; the outer edge of the inner conductive part is covered with an insulating layer, and the inner side of the insulating layer forms a constriction to pass through the matching hole of the air box mounting plate.

The shielding cover is a ring body matched with the bottom of the necking of the insulating layer, wherein a raised edge is formed on the outer edge of the conductive ring, and a gap for matching the mounting plate is formed between the raised edge and the aluminum ring.

The aluminum ring is integrally formed on the conductive ring to form an integral shielding cover.

The shielding cover is made of conductive material and formed by turning.

Concave-convex teeth are further formed on the outer edge of the aluminum ring, and concavo-convex teeth are also formed on the inner edge of the matching hole of the matching air box mounting plate.

Owing to adopting above-mentioned technical scheme, the present invention has following beneficial effect compared with prior art:

1. The present invention improves the structure of the female connecting seat. Through the integrally formed shielding cover with an aluminum ring on the female connecting seat, it can be quickly installed and matched with the air box mounting plate. The female connecting seat does not need to fix the insert and simplifies it. Difficulty of installation.

2. The present invention does not need to make a special female connector, but only adds a shielding cover in the female connecting seat and can cancel the use of the special female connector through the sealing gasket. The shielding cover shields the area where the busbar electric field of the inflatable cabinet is relatively concentrated, improving The electrical performance of the inflatable cabinet is not only safe, convenient and reliable, but also can greatly reduce the cost loss of the busbar connection; it can also achieve shielding of areas prone to concentrated electric fields to ensure safe and reliable operation of switchgear.

Description of drawings

Fig. 1 is a structural cross-sectional view of a busbar connector of the present invention;

Fig. 2 is a cross-sectional view of the structure of the female connecting seat in the busbar connector of the present invention;

Fig. 3 is a schematic top view of the shielding cover in the busbar connector of the present invention;

Fig. 4 is the A-A direction sectional view of Fig. 3;

Fig. 5 is a structural cross-sectional view of a bus bar connector in the prior art.

Detailed ways

Below in conjunction with accompanying drawing 1 to Fig. 4 the present invention will be further described:

As shown in Figure 1, the present invention discloses a busbar connector, which includes two symmetrical female connectors A, left and right air box mounting plates 4 connected to the female connectors A, a gasket 5 and a conductive inner core 6; and Each female connector A includes an inner conductive part 1 , an insulating layer 2 and a shielding cover 3 .

As shown in FIG. 1 , the inside of the inner conductive member 1 is formed with a groove 11 matching the conductive inner core 6; while the outer edge of the inner conductive member 1 is covered with an insulating layer 2, and the inner side of the insulating layer 2 is formed with a constriction 21 to penetrate Through the matching hole 41 of the air box mounting plate 4.

As shown in Figures 3 and 4, the shielding cover 3 is a ring body fitted to the bottom of the neck 21 of the insulating layer 2, which includes a conductive ring 31 and an aluminum ring 32 embedded in the conductive ring. 31 is made of non-insulating materials such as conductive or semiconductive; wherein a convex edge 311 is formed on the outer edge of the conductive ring 31 , and a slot 312 matching the mounting plate 4 is formed between the convex edge 311 and the aluminum ring 32 . The aluminum ring 32 is integrally formed on the conductive ring 31 to form an integrated shielding cover 3; of course, the shielding cover 3 can also be formed by using conductive materials and other manufacturing means such as lathe processing.

In addition, concave-convex teeth 321 are further formed on the outer edge of the aluminum ring 32, and concave-convex teeth are also formed on the inner edge of the matching hole 41 of the air box mounting plate 4. Quick fit with mounting plate 4.

Furthermore, as shown in FIG. 1 , the above-mentioned inner conductive part 1 , insulating layer 2 and shielding cover 3 are press-injected into a whole to form a female connector A.

As shown in Figures 1 and 2, when the busbar connector of the present invention is assembled, the inner sides of the left and right female connecting seats A are installed on the left and right air box mounting plates 4 oppositely, that is, the necks 21 of each female connecting seat A pass through The aluminum ring 32 of the shield cover 3 passes through the matching hole 41 of the air box mounting plate 4, and the convex edge 311 of the conductive ring 31 is against the air box mounting plate 4, and the female connector A passes through After the matching hole 41 of the mounting plate 4 is rotated at a certain angle, the fixed installation of the female connecting seat is realized; at the same time, a conductive inner core 6 is placed in the groove 11 of the left and right female connecting seats A to connect the left and right female connecting seats A is connected, and the sealing gasket 5 is set between the two female connecting seats A to realize the sealing and insulation of the left and right female connecting seats A, and then the sealing ring groove 312 and the sealing ring 313 between the shielding cover 3 and the air box mounting plate 4 can be used. Realize the sealing between the female connector A and the gas phase.

To sum up, the busbar connector of the present invention can realize quick installation and cooperation with the gas box mounting plate 4 through the shielding cover 3 with the aluminum ring 32 integrally formed on the female connecting seat A, without the need for fixed inserts, thus The difficulty of installation is simplified; in addition, the present invention only adds a shielding cover 3 in the female connecting seat A and the use of the special female connector can be canceled through the sealing gasket 5, and the shielding cover 3 shields the area where the electric field of the bus bar of the inflatable cabinet is relatively concentrated , Improving the electrical performance of the inflatable cabinet is not only safe, convenient and reliable, but also can greatly reduce the cost loss of the busbar connection, and can shield the area that is prone to electric field concentration to ensure the safe and reliable operation of the switchgear.

Claims (6)

1. a bus tie, is characterized in that: comprise symmetrical two female seateds, connect the left and right gas tank mounting panel of each female seated, be arranged on sealing gasket between two female seateds and be communicated with the conductive core of two female seateds; Each female seated includes integrated interior electric-conductor, insulating barrier and radome; Described radome is a ring body being matched with on insulating barrier, and it comprises a conducting ring and is embedded at the aluminium ring on conducting ring.

2. a kind of bus tie as claimed in claim 1, is characterized in that: form the groove coordinating conductive core inside described interior electric-conductor; And the outer rim coated insulation layer of interior electric-conductor, form necking down inside this insulating barrier with the mating holes through gas tank mounting panel.

3. a kind of bus tie as claimed in claim 2, is characterized in that: described radome is a ring body being matched with bottom insulating barrier necking down, is wherein formed with convex edge in conducting ring outer rim, forms the short slot coordinating mounting panel between this convex edge with aluminium ring.

4. a kind of bus tie as claimed in claim 3, is characterized in that: described aluminium ring is shaped in conducting ring, aluminium ring and conducting loop-shaped all-in-one-piece radome.

5. a kind of bus tie as claimed in claim 3, is characterized in that: described radome adopts electric conducting material to adopt Vehicle Processing shaping.

6. a kind of bus tie as described in claim 4 or 5, is characterized in that: the outer rim of described aluminium ring forms shaggy tooth further, and the inner edge of the gas tank mounting panel mating holes simultaneously coordinated also forms shaggy tooth.