CN201717521U - Connecting device for high-voltage shielding sleeve - Google Patents

Abstract

The utility model discloses a connecting device for a high-voltage shielding sleeve, which comprises an arc-shaped top plate, an omega-shaped bottom plate, a connecting rod and a compression spring, and the upper part of the connecting rod is fixedly connected with the arc-shaped top plate; The middle part of the Ω-shaped bottom plate has a through hole, the lower part of the connecting rod passes through the through hole, and a nut is connected to the lower part of the connecting rod; the compression spring is sleeved on the connecting rod, placed between the arc-shaped top plate and the omega-shaped bottom plate. Through the connection device for high-voltage shielding bushing of the utility model, equipment discharge and arcing caused by poor contact between the equalizing ring and the high-voltage bus in the high-voltage shielding bushing are avoided, and the safe and stable operation of the power supply equipment is ensured.

Description

A connection device for high-voltage shielding bushing

technical field

The utility model designs a high-voltage shielding bushing, in particular to a connecting device for connecting a pressure equalizing ring and a busbar for eliminating the discharge phenomenon in the high-voltage shielding bushing. the

Background technique

High-voltage electrical cabinets, such as 35kV electrical cabinets, are composed of incoming line switches, main transformer switch and segmental switch cabinets, etc. High-voltage shielding bushings are installed between cabinets, and the electrical connection between cabinets is realized through bus bars. When the busbar passes through the high-voltage shielding bushing, its insulation from the outside mainly depends on the high-voltage shielding bushing. The high-voltage shielding bushing is an important insulation device for each switchgear connected through the busbar. the

Figure 1 is a schematic diagram of an existing high-voltage shielding sleeve. As shown in the figure, the high-voltage shielding sleeve includes an insulating pipe body 1 and a conductive pressure equalizing ring 2, and the pipe body 1 is wrapped outside the pressure equalizing ring 2 , the pipe body 1 is provided with a mounting flange 3 outside. The pipe body 1 is a barrel-shaped object formed by one-time casting of insulating epoxy resin. According to the process requirements, when the busbar 4 passes through the high-voltage shielding bushing, the pressure equalizing ring 2 and the busbar 4 must be connected reliably through the connecting device. The equipotential is formed in the shielding sleeve. The existing connection device for connecting the equalizing ring 2 and the bus bar 4 usually adopts the form shown in FIG. 1 , that is, a V-shaped retaining spring 5 is used for connection. The V-shaped circlip 5 is placed between the bus bar 4 and the equalizing ring 2 , and is in contact with the bus bar 4 and the equalizing ring 2 respectively to form a connecting conductor between the bus bar 4 and the equalizing ring 2 . the

The above-mentioned V-shaped circlip 5 connection has the following problems in practical applications: Since the copper busbar 4 is covered with a thicker layer of rubber, when installing the V-shaped circlip 5, the installer dug two holes in advance, The copper body of the bus bar 4 is exposed, so that the V-shaped retaining spring 5 is in reliable contact with the bus bar 4, so that its connection point is fixed and the contact area is small. Once the busbar 4 passes a large current during use or when the maintenance equipment tramples on the busbar 4, the V-shaped retaining spring 5 will be in poor contact with the busbar 4 due to vibration and other reasons. As a result, there is no reliable connection between the pressure equalizing ring 2 and the bus bar 4, so that a voltage difference is formed in the high-voltage shielding bushing to form a strong magnetic field. The shielding casing exploded, causing a vicious accident of power outage in a large area. the

Utility model content

In order to solve the above problems, the utility model provides a connection device for the high-voltage shielding bushing, which ensures reliable connection between the busbar and the pressure equalizing ring in the high-voltage shielding bushing. the

In order to achieve the above purpose, the connecting device for high-voltage shielding bushing of the present invention includes an arc-shaped top plate, an Ω-shaped bottom plate, a connecting rod and a compression spring, and the upper part of the connecting rod is fixedly connected with the arc-shaped top plate; There is a through hole in the middle of the Ω-shaped bottom plate, the lower part of the connecting rod passes through the through hole, and a nut is connected to the lower part of the connecting rod; the compression spring is sleeved on the connecting rod, placed on the connecting rod between the arc-shaped top plate and the Ω-shaped bottom plate. the

Preferably, one end of the compression spring is connected to the arc-shaped top plate, and the other end is connected to the Ω-shaped bottom plate.

Preferably, a wire is connected between the arc-shaped top plate and the Ω-shaped bottom plate. the

Through the connection device for high-voltage shielding bushing of the utility model, a reliable connection is always maintained between the bus bar and the voltage equalizing ring, and equipment discharge caused by poor contact between the voltage equalizing ring and the high-voltage bus in the high-voltage shielding bushing is avoided. And arc phenomenon, to ensure the safe and stable operation of power supply equipment. the

Description of drawings

Figure 1 is a schematic diagram of an existing high-voltage shielding bushing;

Fig. 2 is the schematic diagram of the preferred embodiment of the connecting device for the high-voltage shielding bushing of the utility model;

Fig. 3 is a schematic diagram of the connection device in Fig. 2 being used for a high-voltage shielding bushing;

Fig. 4 is a schematic diagram of another preferred embodiment of the connection device for high-voltage shielding bushings of the present invention. the

Detailed ways

Fig. 2 is a schematic diagram of a preferred embodiment of the connecting device for high-voltage shielding bushings of the present invention, as shown in the figure, the connecting device for high-voltage shielding bushings of the present invention includes an arc-shaped top plate 11 and an Ω-shaped bottom plate 12, connecting rod 13 and compression spring 14. the

The upper part of the connecting rod 13 is fixedly connected with the arc-shaped top plate 11 by welding or other conventional mechanical fixed connections. the

The middle part of the Ω-shaped bottom plate 12 has a through hole, the bottom of the connecting rod 13 passes through the through hole, and a nut 15 for limiting is connected at the bottom of the connecting rod 13 to prevent the Ω-shaped bottom plate from 12 is separated from the connecting rod 13, and the Ω-shaped bottom plate 12 can move up and down relative to the connecting rod 13. Certainly, its position-limiting also can adopt to punch the bottom of connecting rod 13, and wear positioning pin in the hole to realize. The through hole should be opened at the arched protruding position of the Ω-shaped bottom plate 12 , so that the lower part of the connecting rod 13 is located in the arched area of the Ω-shaped bottom plate 12 . the

The compression spring 14 is sleeved on the connecting rod 13 and placed between the arc-shaped top plate 11 and the Ω-shaped bottom plate 12 . Preferably, one end of the compression spring 14 is connected to the arc-shaped top plate 11 , and the other end is connected to the Ω-shaped bottom plate 12 . the

FIG. 3 is a schematic diagram of the connection device in FIG. 2 being used for a high-voltage shielding bushing. As shown in the figure, the curvature of the arc-shaped top plate 11 matches the pressure equalizing ring 2 . When in use, the connecting device of the present invention is placed between the pressure equalizing ring 2 and the bus bar 4, the arc-shaped top plate 11 is in contact with the pressure equalizing ring 2, the Ω-shaped bottom plate 12 is in contact with the bus bar 4, and the compression spring 14 is in contact with the bus bar 4. Installation should maintain a pre-compression amount. In this way, when the bus bar 4 vibrates, the contact between the arc-shaped top plate 11 and the pressure equalizing ring 2 and the contact between the Ω-shaped bottom plate 12 and the bus bar 4 are always kept tight by the compression and extension of the compression spring 14 . Moreover, since the contact between the arc-shaped top plate 11 and the pressure equalizing ring 2, and the contact between the Ω-shaped bottom plate 12 and the bus bar 4 are all in surface contact, the contact area is large, and the resistance value of the contact surface is minimized to avoid the occurrence of poor contact. The resistance value increases, resulting in equipment discharge and arcing. the

Figure 4 is a schematic diagram of another preferred embodiment of the connection device for high-voltage shielding bushings of the present invention, as shown in the figure, compared with the embodiment shown in Figure 2, the difference is that the arc shape of this embodiment There are wires 16 connected between the top plate 11 and the Ω-shaped bottom plate 12, preferably multiple wires 16, so as to further ensure the reliability of the connection between the arc-shaped top plate 11 and the Ω-shaped bottom plate 12. the

Claims (4)

1. a jockey that is used for the high-tension shielding sleeve pipe is characterized in that, comprises curved roof, Ω shape base plate, connecting rod and compression spring,

Fixedly connected with described curved roof in the top of described connecting rod;

The middle part of described Ω shape base plate has through hole, and described through hole is passed in the bottom of described connecting rod, and connects a nut in the bottom of described connecting rod;

Described compression spring housing places between described curved roof and the Ω shape base plate on described connecting rod.

2. the jockey that is used for the high-tension shielding sleeve pipe as claimed in claim 1 is characterized in that, an end of described compression spring is connected with described curved roof, and the other end is connected with described Ω shape base plate.

3. the jockey that is used for the high-tension shielding sleeve pipe as claimed in claim 1 or 2 is characterized in that, is connected with lead between described curved roof and the Ω shape base plate.

4. the jockey that is used for the high-tension shielding sleeve pipe as claimed in claim 3 is characterized in that described lead is many.

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