CN213124076U

CN213124076U - Device for improving local overheating of transformer oil tank on site

Info

Publication number: CN213124076U
Application number: CN202021835172.8U
Authority: CN
Inventors: 常德雷; 鲁静; 杨亚如; 李冰; 祝建立
Original assignee: Shandong Dachi Electric Co Ltd
Current assignee: Shandong Dachi Electric Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-05-04
Anticipated expiration: 2030-08-28

Abstract

The utility model relates to a field maintenance technical field of transformer discloses a local overheated device of on-spot improvement transformer tank very much. This local overheated device of transformer tank is improved on scene, including the oil tank of internally mounted transformer, there is the local hot spot of oil tank on the oil tank wall of corresponding transformer coil, its characterized in that: the oil tank wall is fixed with a plurality of fixing bolt along the local hot spot of oil tank all around, and fixed clamp plate passes through fixing bolt and nut and installs on the oil tank wall, and the centre gripping has the magnetism shielding shaping piece between fixed clamp plate and the oil tank wall. The utility model discloses simple structure, simple to operate, the reliability is high, can make the local overheat of transformer tank obtain solving at the transformer operation scene, has avoided the transformer to return the factory maintenance, has effectively reduced the maintenance cost of transformer, has reduced maintenance cycle, provides effective guarantee for the normal operation of transformer substation.

Description

Device for improving local overheating of transformer oil tank on site

Technical Field

The utility model relates to a field maintenance technical field of transformer, in particular to local overheated device of on-spot improvement transformer tank.

Background

At the present stage, along with the development and progress of industrial economy and national economy, the power consumption demand is larger and larger, in order to meet the power consumption demand and the safety and effectiveness of users, a power supply department adopts to increase the capacity of a transformer to solve the problem of the power consumption demand, and adopts to increase the impedance voltage of the transformer to enhance the short-circuit resistance of the transformer so as to improve the power supply safety and effectiveness of a power grid. The leakage flux of the transformer is increased due to the increase of the capacity and the impedance voltage of the transformer, and if the leakage flux of the transformer is not well treated, the local overheating phenomenon of an oil tank can be easily caused when the transformer runs on site for a period of time; originally, solving this kind of phenomenon and needing to return to the factory and adjust transformer inner structure, the cycle is long, and is great to manpower and materials consumption, seriously influences the normal operation of transformer substation.

Disclosure of Invention

The utility model discloses a remedy prior art not enough, provide a simple structure, simple to operate, the high on-the-spot overheated device of transformer tank that improves of reliability.

The utility model discloses a realize through following technical scheme:

the utility model provides a local overheated device of on-spot improvement transformer tank, includes the oil tank of internally mounted transformer, has the local hot spot of oil tank on the oil tank wall that corresponds transformer coil, its characterized in that: the oil tank wall is fixed with a plurality of fixing bolt along the local hot spot of oil tank all around, and fixed clamp plate passes through fixing bolt and nut and installs on the oil tank wall, and the centre gripping has the magnetism shielding shaping piece between fixed clamp plate and the oil tank wall.

The utility model discloses pass through the magnetic shield shaping piece of stationary platen installation at the local hot spot of oil tank, eliminate the magnetic leakage of transformer coil here through the magnetic shield shaping piece to reduce the heat that the magnetic leakage passed the production in the oil tank wall, improve the local overheated phenomenon of transformer tank.

The utility model discloses a more excellent technical scheme does:

the magnetic shielding forming block is formed by stacking a plurality of high-permeability silicon steel sheets, an insulating layer is wrapped outside the magnetic shielding forming block, and a grounding wire is clamped in the middle of the magnetic shielding forming block; the magnetic conduction effect of the magnetic shielding forming block is good, the magnetic leakage of the transformer passes through the magnetic shielding forming block in urban and rural areas, and the magnetic leakage flux in the wall of the transformer oil tank is reduced; the grounding wire realizes grounding when the transformer operates.

More preferably, the thickness of the stacked high-permeability silicon steel sheets is 10-25mm, the thickness of the insulating layer is 0.5mm, and the grounding wire is a soft copper belt with the thickness of 0.3mm, so that magnetic leakage dredging is realized.

The inboard horizontal boss that is provided with of stationary platen lower part, the bearing has magnetic shield shaping piece on the boss, and the vibrations that the prevention when because of the transformer operation lead to the condition emergence of magnetic shield shaping piece landing.

The number of the fixing bolts is four, the size and the position of the fixing pressing plate correspond to the area of the local overheating position of the transformer oil tank, and the magnetic shielding forming block is installed and fixed by fixing the four corners of the fixing pressing plate.

The utility model discloses simple structure, simple to operate, the reliability is high, can make the local overheat of transformer tank obtain solving at the transformer operation scene, has avoided the transformer to return the factory maintenance, has effectively reduced the maintenance cost of transformer, has reduced maintenance cycle, provides effective guarantee for the normal operation of transformer substation.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a primary transformer tank;

FIG. 3 is a schematic front view of a magnetic shield forming block;

FIG. 4 is a left side view of the magnetic shield forming block;

FIG. 5 is a schematic front view of the stationary platen;

fig. 6 is a left side view of the fixed platen.

In the figure, 1 transformer coil, 2 magnetic leakage lines of force, 3 oil tank walls, 4 fixing bolts, 5 nuts, 6 magnetic shielding forming blocks, 7 fixing pressing plates, 8 high-permeability silicon steel sheets, 9 insulating layers, 10 grounding wires and 11 bosses.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The attached drawing is a concrete embodiment of the utility model. This embodiment includes the oil tank of internally mounted transformer, has the local hot spot of oil tank on the oil tank wall 3 of corresponding transformer coil 1, oil tank wall 3 is fixed with a plurality of fixing bolt 4 along the local hot spot of oil tank all around, and fixing plate 7 passes through fixing bolt 4 and nut 5 and installs on oil tank wall 3, and the centre gripping has magnetic screen shaping piece 6 between fixing plate 7 and the oil tank wall 3.

The utility model discloses the device needs fixing bolt 4, nut 5, magnetism shielding shaping piece 6, the supplementary completion of stationary platen 7, and can accomplish at the transformer operation scene.

The magnetic shielding forming block 6 is formed by stacking high-permeability silicon steel sheets 8, the thickness of the magnetic shielding forming block is 10-25mm, a 0.5mm insulating layer 9 wraps the outside of the magnetic shielding forming block, a 0.3mm soft copper strip is clamped in the middle of the magnetic shielding forming block and led out to serve as a grounding wire 10, the grounding wire 10 needs to be grounded when a transformer operates, and the size of the magnetic shielding forming block 6 is determined according to the area of a local hot spot of a transformer oil tank.

The number and the size of the mounting holes of the fixed pressing plate 7 correspond to those of the fixing bolts 4, the boss 11 needs to be reserved on the lower portion of the inner side of the fixed pressing plate 7, the magnetic shielding forming block 6 can be supported after mounting, and the situation that the magnetic shielding forming block 6 slides off due to vibration of the transformer during operation is prevented.

After finding local hot spots of the transformer oil tank on site, welding four or more fixing bolts 4 around the transformer oil tank (outside the transformer oil tank), and tightly fixing a magnetic shielding forming block 6 on the outside of the wall 3 of the transformer oil tank by using a fixing pressing plate 7 through the fixing bolts 4 and nuts 5; because magnetic shield shaping piece 6 is formed by 8 stackings of high magnetic conduction silicon steel sheet, and magnetic conduction is effectual, so the magnetic leakage magnetic line of force 2 of transformer here can pass in magnetic shield shaping piece 6, has reduced the magnetic leakage flux in transformer tank wall 3, has just also reduced the heat that the magnetic leakage passed the production in oil tank wall 3 to transformer tank local overheat's phenomenon has been improved.

The utility model discloses the device can make the local overheat of transformer tank obtain solving at the transformer operation scene, has avoided the transformer to return the factory to maintain, has effectively reduced the maintenance cost of transformer, has reduced maintenance cycle, gains the time for the normal operation of transformer substation. The device is mainly applied to large-scale power transformers and high-impedance transformers with the voltage class of 35kV and above.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned are only embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a local overheated device of on-spot improvement transformer tank, includes the oil tank of internally mounted transformer, has the local hot spot of oil tank on oil tank wall (3) of corresponding transformer coil (1), its characterized in that: a plurality of fixing bolts (4) are fixed on the periphery of the oil tank wall (3) along the local hot spot of the oil tank, a fixing pressing plate (7) is installed on the oil tank wall (3) through the fixing bolts (4) and nuts (5), and a magnetic shielding forming block (6) is clamped between the fixing pressing plate (7) and the oil tank wall (3).

2. The device for improving local overheating of a transformer tank in site as claimed in claim 1, wherein: the magnetic shielding forming block (6) is formed by stacking a plurality of high-permeability silicon steel sheets (8), an insulating layer (9) is wrapped outside, and a grounding wire (10) is clamped in the middle.

3. The device for improving local overheating of a transformer tank in site as claimed in claim 1, wherein: and a horizontal boss (11) is arranged on the inner side of the lower part of the fixed pressing plate (7), and a magnetic shielding forming block (6) is supported on the boss (11).

4. The device for improving local overheating of a transformer tank in site as claimed in claim 1, wherein: the number of the fixing bolts (4) is four.

5. The device for improving local overheating of a transformer oil tank in site as claimed in claim 2, wherein: the thickness of the stacked high-permeability silicon steel sheets (8) is 10-25mm, the thickness of the insulating layer (9) is 0.5mm, and the thickness of the grounding wire (10) is 0.3mm of a soft copper strip.