CN105514632A - Busbar isolation device for transformer testing - Google Patents

Abstract

The present invention discloses a transformer test busbar isolating device, which is characterized in that it includes a top insulating fixing plate, upper and lower end connecting rods, a screw sleeve and a bottom insulating fixing plate, and the middle part of the back of the top insulating fixing plate and the bottom insulating fixing plate Both are equipped with triangular splints and the plates are connected by rotation of plastic pins; the threads of the upper half of the internal thread of the screw sleeve are opposite to the thread direction of the lower half, corresponding to it, the upper and lower connecting rods are provided with the screw sleeve The internal thread matches the external thread. The transformer test busbar isolating device has simple structure, low cost, and is easy to carry, and because it can isolate the dismantled busbar crimping joint from the bushing at the upper end of the transformer during the high-voltage test of the transformer, so the operation is safe and It saves time and effort, can improve labor efficiency, and can ensure the reliable fixation of the bus bar, and ensure that it maintains a sufficient safety distance from the upper bushing of the transformer, which can increase the speed of installation and recovery work.

Description

Bus Bar Isolation Device for Transformer Test

technical field

The invention relates to a safety device that can effectively ensure the high-voltage test of the transformer, especially for the transformer test that is mainly used in the power failure test of 35kV and above transformers to isolate the busbar, firmly fix, operate safely, and improve efficiency. Busbar isolation device.

Background technique

With the rapid development of the smart grid, the pace of grid construction is accelerating, and the number of substations under the company's jurisdiction is also increasing year by year. As one of the main equipment of the substation, the number of transformers is also increasing. In order to achieve the increasing reliability of the power grid, it is particularly important to ensure the safe and stable operation of the transformer. As an important means to detect the operating status of the transformer, the high-voltage test is a work item that is often carried out when the transformer is powered off for maintenance. Most of the high-voltage test work needs to disconnect the lead wires on each side of the transformer and fix them away from the transformer body. For the low-voltage side bus bar, it is necessary to remove the bus bar pressure connector and completely disconnect the bus bar from the transformer body bushing. , and maintain a prescribed safe distance. At present, the bus bars on the low-voltage side of the transformer are all copper or aluminum bars, and most of them are copper bars, which are heavy and not easy to bend. The bus bars are fixed on the bus bridge through several post insulators. The current test method is generally to release the bus bar pressure relief joint, untie the fixed pressure plate of the post insulator, and then move the bus bar horizontally to a suitable position to ensure that the safe distance between it and the bushing meets the test requirements. During the working process, it is generally necessary to untie two to three post insulator pressure plates before moving laterally to a suitable position. It takes a lot of time to disassemble and assemble the post insulator pressure plates, which greatly reduces the efficiency of transformer testing.

Contents of the invention

The purpose of the present invention is to provide a simple structure, low cost, easy to carry, time-saving and labor-saving, can ensure the reliable fixation of the bus bar, ensure that it maintains a sufficient safe distance from the bushing of the transformer body, and greatly improve the work of installation and recovery work. It is mainly used in the bus bar isolation device for transformer test in the power failure test of 35kV and above transformers, and shortens the working time.

In order to achieve the above purpose, the technical solution adopted by the present invention is: the transformer test busbar isolating device, which is characterized in that it includes a top insulating fixing plate, an upper connecting rod, a lower connecting rod, a screw sleeve and a bottom insulating fixing plate, and the top The middle part of the back of the insulating fixing plate and the bottom insulating fixing plate are equipped with triangular splints; the triangular splints of the top insulating fixing plate are connected with the top of the upper connecting rod through plastic pins; the triangular splints of the bottom insulating fixing plate are connected by corresponding plastic pins Rotately connected with the bottom end of the lower connecting rod; the thread direction of the upper half of the internal thread of the screw sleeve is opposite to that of the lower half, corresponding to it, the lower part of the upper connecting rod and the upper part of the lower connecting rod are provided with The internal thread of the screw sleeve matches the external thread, the bottom of the upper connecting rod is screwed into the upper part of the screw sleeve, and the top of the lower connecting rod is screwed into the lower part of the screw sleeve.

The present invention is also implemented through the following measures: the top insulating fixing plate and the bottom insulating fixing plate are both rectangular plates, the four corners of the top insulating fixing plate are provided with bolts correspondingly connected with the bus crimping joints, and the bottom insulating fixing plate The four corners of the transformer are provided with bolts correspondingly connected with the bushing at the upper end of the transformer.

The top insulating fixing plate, the bottom insulating fixing plate, and the plastic pin are all made of high-strength engineering plastics.

The beneficial effects of the present invention are: the transformer test busbar isolating device not only has simple structure, low cost, and is easy to carry, but also can The crimping joint of the dismantled bus bar is isolated from the bushing at the upper end of the transformer, so the operation is safe, time-saving and labor-saving, and labor efficiency can be improved, and it can ensure the reliable fixing of the bus bar and ensure that it is sufficiently safe with the upper bushing of the transformer The distance can increase the speed of installation and recovery work.

Description of drawings

Fig. 1 is a schematic side view of the structure of the present invention.

Fig. 2 is a schematic front view of the structure of the present invention.

Fig. 3 is an axial cross-sectional schematic diagram of the assembly of the structural screw sleeve, the upper connecting rod and the lower connecting rod of the present invention.

Fig. 4 is a schematic diagram of the application state of the present invention.

detailed description

Example

Fig. 1, Fig. 2, Fig. 3 have provided an embodiment of the present invention. Make the present invention with reference to Fig. 1, Fig. 2, Fig. 3. The transformer test bus bar isolation device is characterized in that it includes a top insulating fixing plate 1, an upper connecting rod 2, a lower connecting rod 3, a screw sleeve 4 and a bottom insulating fixing plate 5, and the top insulating fixing plate 1 and the bottom insulating fixing plate The middle part of the back of 5 is provided with triangular splint 6; the triangular splint 6 of the top insulating fixing plate 1 is connected to the top of the upper connecting rod 2 through the plastic pin 7, so that the angle between the top insulating fixing plate 1 and the upper connecting rod 2 can be adjusted. function; the triangular plywood 6 of the bottom insulating fixing plate 5 is rotationally connected with the bottom end of the lower connecting rod 3 through the corresponding plastic pin 7, so as to realize the function that the angle between the bottom insulating fixing plate 5 and the lower connecting rod 3 can be adjusted; The thread direction of the upper half of the internal thread of the screw sleeve 4 is opposite to that of the lower half. External thread, the lower part of the upper connecting rod 2 is screwed into the upper part of the screw sleeve 4, the upper part of the lower connecting rod 3 is screwed into the lower part of the screw sleeve 4, and the connection between the upper connecting rod 2 and the lower end can be realized through the rotation of the screw sleeve 4 The rod 3 expands and contracts with respect to the screw sleeve 4 at the same time, so as to realize the expansion and contraction of the distance between the top insulating fixing plate 1 and the bottom insulating fixing plate 5 .

As an improvement of the present invention: the top insulating fixing plate 1 and the bottom insulating fixing plate 5 are rectangular plates, and the four corners of the top insulating fixing plate 1 are provided with bolts 8 correspondingly connected with the bus crimping joints, and the bottom insulating The four corners of the fixing plate 5 are all provided with bolts 9 correspondingly connected with the upper bushings of the transformer.

The top insulating fixing plate 1, the bottom insulating fixing plate 5, and the plastic pin shaft 7 are all made of high-strength engineering plastics.

Fig. 4 shows a schematic diagram of the application state of the present invention. Referring to Fig. 4, when using the present invention as a transformer for a power failure test, firstly connect the top insulating fixing plate 1 to the crimping joint of the dismantled bus bar 10 through the bolts 8 correspondingly connected to the bus bar crimping joint, and then connect the bottom insulating fixing plate 5. It is fixedly connected with the bushing at the upper end of the transformer 11 through the bolt 9 correspondingly connected with the upper bushing of the transformer; by turning the screw sleeve 4, the upper connecting rod 2 and the lower connecting rod 3 are stretched at the same time, and the top insulating fixing plate 1 and the bottom insulating fixing plate The distance between the plates 5 is increased, and the distance between the bus bar and the upper bushing of the transformer is adjusted to the safe distance required by the regulations, and then the high-voltage test can be carried out, and the dismantling process can be reversed.

Claims (2)

1. transformer test bus bar spacer assembly, it is characterized in that: comprise top insulation fixing plate (1), upper end connecting rod (2), lower end connecting rod (3), swivel nut (4) and bottom insulation fixed head (5), in the middle part of the back side of top insulation fixing plate (1) and bottom insulation fixed head (5), be equipped with triangular splint (6); The triangular splint (6) of top insulation fixing plate (1) is rotationally connected by the top of plastics bearing pin (7) with upper end connecting rod (2); The triangular splint (6) of bottom insulation fixed head (5) is rotationally connected by the bottom of corresponding plastics bearing pin (7) with lower end connecting rod (3); The screw thread of the internal thread first half of described swivel nut (4) is contrary with the hand of spiral of Lower Half, corresponding thereto, the bottom of upper end connecting rod (2) and the top of lower end connecting rod (3) are provided with the external screw thread matched with the internal thread of swivel nut (4), the bottom of upper end connecting rod (2) screws in the top in swivel nut (4), and the top of lower end connecting rod (3) screws in the bottom in swivel nut (4).

2. transformer test bus bar spacer assembly according to claim 1, it is characterized in that: described top insulation fixing plate (1) and bottom insulation fixed head (5) are rectangular slab, four bights of top insulation fixing plate (1) are equipped with the bolt (8) that connect corresponding to bus-bar compression joint head, and four bights of bottom insulation fixed head (5) are equipped with the bolt (9) that connect corresponding to transformer upper sleeve portion.