CN106054044B

CN106054044B - Insulation test device for gas-filled cabinet

Info

Publication number: CN106054044B
Application number: CN201610672847.3A
Authority: CN
Inventors: 赵睿哲; 孙一帆; 厉复新; 袁丽丹; 刘卫涛
Original assignee: Henan Senyuan Electric Co Ltd
Current assignee: Henan Senyuan Electric Co Ltd
Priority date: 2016-08-16
Filing date: 2016-08-16
Publication date: 2020-01-10
Anticipated expiration: 2036-08-16
Also published as: CN106054044A

Abstract

The invention relates to an insulation test device for an inflatable cabinet, which comprises an insulation sleeve which is sleeved on a wire outlet sleeve and extends up and down, wherein the insulation sleeve extends up and down along an axial direction to form a through hole; the through hole is internally provided with a conductive connecting rod connected with the outgoing line sleeve along the axial direction of the insulating sleeve, the conductive connecting rod comprises a first end part used for connecting a high-voltage wire and a second end part used for connecting the outgoing line sleeve, and the pressing plate is provided with a fixed connection device fixedly connected with the outgoing line sleeve. The insulating sleeve is sleeved outside the wire outlet sleeve, the high-voltage wire and the wire outlet sleeve are connected through the conductive connecting rod, and the insulating sleeve is fixed on the wire outlet sleeve through the fixed pressing plate inside the insulating sleeve, so that the structure is simple, the assembly is convenient, and the labor efficiency is improved.

Description

Insulation test device for gas-filled cabinet

Technical Field

The invention relates to an insulation test device, in particular to an insulation test device for an inflatable cabinet.

Background

With the continuous development of the electric power and switch manufacturing industry in China, in order to realize the miniaturization and high reliability of a switch cabinet, an air inflation cabinet becomes the development trend of medium-voltage switch equipment, and due to the structural particularity of a product adopting a complete sealing mode, a wire outlet sleeve of the air inflation cabinet is insufficient in creepage distance to the ground in the air, and certain difficulty is brought to the measurement of insulating performance in the process of an insulation test of factory leaving and field acceptance. The insulating test mode of current gas insulated switchgear all adopts the mode of installing dedicated test cable on the play line sleeve pipe to accomplish, and this kind of test mode wastes time and energy, often causes experimental failure because of cable installation quality problems again simultaneously, leads to the fact the damage to the play line sleeve pipe then, and when the test cost is higher, the structure is complicated.

Disclosure of Invention

The invention aims to provide an insulation test device for an inflatable cabinet, which is simple in structure and convenient to assemble.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the insulation test device for the gas-filled cabinet comprises an insulation sleeve which is sleeved on a wire outlet sleeve and extends up and down, wherein the insulation sleeve extends up and down along an axial direction to form a through hole, and a pressing plate which is fixedly clamped in the insulation sleeve and is fixedly connected with the insulation sleeve; the through hole is internally provided with a conductive connecting rod connected with the outgoing line sleeve along the axial direction of the insulating sleeve, the conductive connecting rod comprises a first end part used for connecting a high-voltage wire and a second end part used for connecting the outgoing line sleeve, and the pressing plate is provided with a fixed connection device fixedly connected with the outgoing line sleeve.

The insulating sleeve is internally provided with a middle groove for clamping the pressing plate, the pressing plate is a conductive block poured in the insulating sleeve, and the pressing plate is provided with a connecting hole for the conductive connecting rod to pass through along the axial direction of the insulating sleeve.

The conductive connecting rod is a double-end screw, and the fixing and connecting device is arranged on the upper end face of the pressing plate.

The attachment includes a nut disposed on the second end of the electrically conductive connecting rod.

The insulating sleeve is internally provided with a matching surface for interference fit with the outlet sleeve.

The invention has the beneficial effects that:

compared with the prior art, the insulation test device provided by the invention has the advantages that the insulation sleeve is sleeved outside the wire outlet sleeve, the high-voltage wire and the wire outlet sleeve are connected through the conductive connecting rod, and the insulation sleeve is fixed on the wire outlet sleeve through the pressing plate inside the insulation sleeve, so that the structure is simple, the assembly is convenient, and the labor efficiency is improved.

Furthermore, the conductive connecting rod is arranged to be a double-threaded screw, and the characteristic of the double-threaded screw is utilized, so that the connecting hole is formed in the pressing plate, the pressing plate and the wire outlet sleeve are fastened together through the nut, and meanwhile, the sealing performance of the device is guaranteed.

Furthermore, through the interference fit between the insulating sleeve and the outlet sleeve, the creepage clearance is eliminated, and the creepage distance between the high-voltage end and the upper box body is increased, so that the test process is more stable, and the success rate is improved.

Drawings

FIG. 1 is a schematic structural diagram of an insulation test apparatus according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of the insulation test device and the outlet sleeve 10 according to the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

In the specific embodiment of the invention, as shown in fig. 1 to 2, the insulation test device is used for insulation test of a bushing of an inflatable cabinet, and comprises a hollow cylindrical insulation sleeve, the insulation sleeve is an insulation silicone rubber sleeve 1, the insulation sleeve has good insulation and high sealing grade, and is used for being sleeved outside a wire outlet bushing 10, a pressing plate 2 is arranged inside the insulation silicone rubber sleeve 1, the pressing plate 2 is a conductive block poured in the insulation silicone rubber sleeve 1, a connecting hole 3 is arranged at a corresponding position in the middle of the pressing plate 2, and a double-head screw 4 is inserted into the wire outlet bushing 10 through the connecting hole 3 on the pressing plate 2.

During the use, twist on the play line sleeve pipe 10 on last box 9 with double-end screw 4 through the screw thread of its one end, then scribble insulating grease with insulating silicone rubber sleeve 1 after the cover on play line sleeve pipe 10 through connecting hole 3 of inside briquetting 2, use nut 5 and gasket 6 to link firmly briquetting 2 and play line sleeve pipe 10 for interference fit between play line sleeve pipe 10 and insulating silicone rubber sleeve 1. Finally, the high voltage line 11 is attached to the second end of the double-ended screw 4 and the high voltage line 11 is fastened to the double-ended screw 4 with the nut 7 and the flat washer 8.

In other specific embodiments of the invention, the connecting rod may not be provided with a thread, one end of the connecting rod inserted into the wire outlet sleeve is provided with a step shaft, the lower end surface of the step shaft is tightly attached to the upper end surface of the appearing sleeve, the upper end surface is tightly attached to the lower end surface of the pressing plate, and the pressing plate is additionally provided with a connecting hole to connect the wire outlet sleeve and the pressing plate, so that the interference fit of the wire outlet sleeve and the insulating sleeve is ensured; or the connecting rod is provided with threads, the pressing plate is additionally provided with a connecting hole, the outgoing line sleeve and the insulating sleeve are fixed together through the pressing plate, and then the connecting rod is directly screwed into the outgoing line sleeve.

In other embodiments of the present invention, the insulating sheath may be shaped like a shed, so as to increase the creepage distance.

In other embodiments of the present invention, the insulation test apparatus may be applied to insulation tests of other outgoing line bushings, such as transformer outgoing line bushings.

In this embodiment, the pressing plate is made of a conductive block, in other embodiments, the fastening device can be arranged on the upper end surface of the insulating sleeve, and is non-conductive, the pressing plate is fastened on the insulating sleeve by the aid of the fit between the upper end surface of the insulating sleeve and the pressing plate and the nuts and the gaskets, and the connecting rod is screwed into the outlet sleeve.

Claims

1. Aerify cabinet and use insulation test device, its characterized in that: the insulation sleeve is sleeved on the outgoing line sleeve and extends up and down, a through hole extends up and down along the axial direction of the insulation sleeve, and a pressing plate fixedly clamped in the insulation sleeve is fixedly connected with the insulation sleeve; the conductive connecting rod is arranged in the through hole along the axial direction of the insulating sleeve and is connected with the outgoing line sleeve, the conductive connecting rod comprises a first end part used for connecting a high-voltage wire and a second end part used for connecting the outgoing line sleeve, a fixing device used for being fixedly connected with the outgoing line sleeve is arranged on the pressing plate, a middle groove used for clamping the pressing plate is arranged in the insulating sleeve, the pressing plate is a conductive block poured in the insulating sleeve, a connecting hole for the conductive connecting rod to pass through is arranged on the pressing plate along the axial direction of the insulating sleeve, the conductive connecting rod is a double-headed screw rod, the fixing device is arranged on the upper end surface of the pressing plate, the fixing device comprises a nut arranged on the second end part of the conductive connecting rod, the insulating sleeve is an insulating silicone rubber sleeve, when in use, the double-headed screw rod is screwed on the outgoing line sleeve through a thread on one end part of the insulating silicone rubber sleeve, then the insulating silicone rubber sleeve is coated with, and then, fixedly connecting the pressing plate with the outlet sleeve by using a nut and a gasket to ensure that the outlet sleeve is in interference fit with the insulating silicone rubber sleeve, wherein the pressing plate is positioned in the middle of the insulating sleeve and above the outlet sleeve in the up-down direction.

2. The insulation test device for the gas-filled cabinet according to claim 1, characterized in that: the insulating sleeve is internally provided with a matching surface for interference fit with the outlet sleeve.