CN216902482U

CN216902482U - Clamping piece structure of oil-immersed distribution transformer

Info

Publication number: CN216902482U
Application number: CN202123386957.9U
Authority: CN
Inventors: 徐平; 董永熠; 宋加春
Original assignee: Ztt Transformer Co ltd
Current assignee: Ztt Transformer Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-05
Anticipated expiration: 2031-12-30

Abstract

The utility model provides a clamping piece structure of an oil-immersed distribution transformer, which comprises a group of parallel pad feet, wherein two parallel lower clamping pieces are vertically connected to the pad feet, two ends of each lower clamping piece are respectively connected with a side clamping piece through a connecting hanging plate, the tops of the two side clamping pieces are respectively connected with two upper clamping plates parallel to the lower clamping pieces through connecting hanging plates, each upper clamping plate is divided into a high-voltage upper clamping plate and a low-voltage upper clamping plate, a pressing beam is arranged between the high-voltage upper clamping plate and the low-voltage upper clamping plate, a grounding sheet connecting stud is arranged on the low-voltage upper clamping plate, two ends of each high-voltage upper clamping plate and two ends of each low-voltage upper clamping plate are respectively provided with a hanging plate, and each hanging plate is provided with a hoisting hole. The utility model can effectively avoid the stress deformation of the coil and the iron core of the transformer in the transportation process, the hoisting process and the abnormal working condition, greatly enhances the capability of the transformer for resisting the sudden short circuit, has simple and reasonable structure and good heat dissipation effect, optimizes the arrangement of high and low voltage leads and has better economy.

Description

Clamping piece structure of oil-immersed distribution transformer

Technical Field

The utility model belongs to the technical field of electrical equipment, and particularly relates to a clamping piece structure of an oil-immersed distribution transformer.

Background

The high overload transformer needs to meet the requirements of high load, high temperature rise and sudden short circuit resistance, and has certain economical efficiency. Therefore, on the premise of ensuring the performance, the reasonable reduction of the manufacturing cost of the transformer is necessary, so the clamping piece structure of the high-overload oil-immersed transformer is produced. The high overload transformer in the prior art mainly adopts a fixed structure with a laminated iron core, most of the clamping structure mainly comprises a high-voltage and low-voltage upper clamping piece and a low-voltage lower clamping piece which are made of channel steel, a pad foot and a pressure beam are connected with the high-voltage and low-voltage upper clamping piece and the low-voltage lower clamping piece which are made of flat steel, the space above and below the coil end is severely limited by making the channel steel clamping pieces, so that the coil can only adopt a radial tap, a high-voltage lead is led out in the width direction of the coil, the width of an oil tank is increased, the whole volume of the transformer is increased, the corresponding manufacturing cost is increased, in addition, the existing high overload transformer clamping piece structure is abnormal in the working condition of the transformer, when the temperature in the transformer body is sharply increased, the good heat dissipation effect cannot be achieved, the coil and the iron core are easily stressed and deformed, the capability of resisting sudden short circuit is poor, the arrangement of the high-voltage and low-voltage lead leading-out structure is unreasonable, and the economy is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model discloses a clamping piece structure of an oil-immersed distribution transformer, which is designed based on a three-phase four-frame five-column planar wound iron core and mainly comprises high-low voltage upper and lower clamping pieces, side clamping pieces, pad feet, pressing beams and other accessory supporting plates. The upper clamping piece and the lower clamping piece of the high-low voltage adopt angle steel structures, grooves are formed in the corresponding positions of the axial heads of the coils, the space above the end portions of the coils is well utilized, high-low voltage lead wires are led out in the axial direction of the coils, the space of the upper portion of the oil tank is reasonably utilized, and the oil tank has good economical efficiency. In addition, the clamping piece structure has better burst short circuit resistance.

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

the utility model provides an oil-immersed distribution transformer's folder structure, a set of pad foot including parallel arrangement, fill up and connect two lower folders that are parallel to each other perpendicularly on the foot, the both ends of folder are respectively through connecting other folder, two other folder is connected to the both ends of other folder through connecting the hanger plate respectively two with the punch holder that the folder is parallel down, the punch holder divide into a high-pressure punch holder and a low pressure punch holder, the high-pressure punch holder with be provided with the compression beam between the low pressure punch holder, be provided with earthing lug connecting stud on the low pressure punch holder, the high pressure punch holder with the both ends of low pressure punch holder are provided with the hanger plate respectively, be provided with the hole for hoist on the hanger plate.

Furthermore, reinforcing ribs are welded on the high-voltage upper clamping plate and the low-voltage upper clamping plate, so that the strength of the clamping piece is prevented from being reduced due to the fact that the high-voltage and low-voltage lead wires are axially led out of the clamping piece and the clamping piece is grooved.

Furthermore, the lower clamping piece and the foot pad are connected and fixed through angle steel.

Furthermore, screw holes are respectively formed in the positions, corresponding to the lower clamping piece, of the high-pressure upper clamping plate and the low-pressure upper clamping plate. The upper clamping piece, the upper laminated wood, the coil, the iron core, the lower laminated wood and the lower clamping piece are fixed and limited up and down by using a pull screw, a stop washer and a locknut through holes formed in corresponding positions on the clamping pieces.

Furthermore, two pairs of wire clamp brackets are arranged on the high-pressure upper clamping plate and the low-pressure upper clamping plate.

Furthermore, a pull screw rod is arranged between the two side clamping pieces positioned on the same side. The upper clamping piece, the lower clamping piece and the coil iron core are fixed and limited left and right by the clamping pieces at two sides through the connecting hanging plates welded on the upper clamping piece and the lower clamping piece under high pressure and low pressure by using the pull screw rod, the stop washer and the locknut.

The beneficial effects of the utility model are as follows:

the utility model can effectively avoid the stress deformation of the coil and the iron core of the transformer in the transportation process, the hoisting process and the abnormal working condition, greatly enhances the capability of the transformer for resisting the sudden short circuit, has simple and reasonable structure and good heat dissipation effect, optimizes the arrangement of high and low voltage leads, leads out the high and low voltage leads of the coil with less bending and less material consumption, reasonably controls the electrical distance and is more economic.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

fig. 4 is a left side view of the present invention.

Reference numerals and component parts description referred to in the drawings:

1-high voltage upper clamp; 2-low voltage upper clamp; 3-pressing the beam; 4-reinforcing ribs; 5-connecting the stud with the grounding plate; 6-positioning the nail; 7-a lead clamp holder; 8-hanging the plate; 9-side clamping piece; 10-connecting a hanging plate; 11-foot pad; 12-angle steel; 13-lower clip.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the utility model and not as limiting the scope of the utility model.

As shown in fig. 1, the clamping structure of the oil-immersed distribution transformer of this embodiment includes a set of parallel pad feet 11, two parallel lower clamping pieces 13 are vertically connected to the pad feet 11, two ends of the lower clamping pieces 13 are respectively connected to one side clamping piece 9 through a connecting suspension plate 10, the top of the side clamping piece 9 is respectively connected to two upper clamping plates parallel to the lower clamping piece through a connecting suspension plate 10, each upper clamping plate is divided into a high-voltage upper clamping plate 1 and a low-voltage upper clamping plate 2, a pressure beam 3 is arranged between the high-voltage upper clamping plate and the low-voltage upper clamping plate, a grounding plate connecting stud 5 is arranged on the low upper clamping plate, suspension plates 8 are respectively arranged at two ends of the high-voltage upper clamping plate and the low-voltage upper clamping plate, and a hoisting hole is arranged on each suspension plate for hoisting a transformer body.

In the embodiment, the high-voltage upper clamping plate and the low-voltage upper clamping plate are both welded with the reinforcing ribs 4, so that the strength of the clamping piece reduced due to the fact that the high-voltage and low-voltage lead wires are axially led out of the clamping piece and are grooved is avoided.

The lower clip and the foot pad of the present embodiment are connected and fixed by angle steel 12.

In this embodiment, screw holes are respectively arranged at corresponding positions on the high-pressure upper clamping plate and the low-pressure upper clamping plate and the lower clamping piece. The upper clamping piece, the upper laminated wood, the coil, the iron core, the lower laminated wood and the lower clamping piece are fixed and limited up and down by opening holes at corresponding positions on the clamping pieces and using a pull screw rod, a stop washer and a locknut.

Two pairs of wire clamp brackets 7 are arranged on the high-pressure upper clamp plate and the low-pressure upper clamp plate of the embodiment.

In this embodiment, a pull screw is disposed between the two side clamping pieces located on the same side. The clamping pieces 9 on two sides fix the upper and lower clamping pieces and the coil iron core to limit left and right by a connecting hanging plate 10 welded on the upper and lower clamping pieces under high and low pressure and by a pulling screw rod, a stop washer and a locknut.

By adopting the above scheme, the working process of the clamping piece structure of the oil-immersed distribution transformer of the embodiment is as follows:

the lapped iron core coil is assembled, limited and fixed by a high-voltage upper clamping piece 1, a low-voltage upper clamping piece 2, a lower clamping piece 13, a side clamping piece 9, a pressing beam 3 and a pad foot 11.

The upper clamp, the upper laminated wood, the coil, the iron core, the lower laminated wood and the lower clamp are fixed and limited up and down by a pull screw, a stop washer and a locknut through holes at corresponding positions on the upper clamp and the lower clamp; the upper clamping piece, the lower clamping piece and the coil iron core are limited left and right by the two side clamping pieces through connecting hanging plates welded on the upper clamping piece and the lower clamping piece under high pressure and low pressure by using a pull screw rod, a stop washer and a locknut; the high-voltage upper clamping piece and the low-voltage upper clamping piece are reinforced, fixed and limited through the pressing beam; the lower clamping piece is reinforced, fixed and limited by the long pad leg and the short pad leg; laminated wood positioning threaded holes are formed in the upper clamping piece and the lower clamping piece of the high pressure and the low pressure, and the laminated wood is positioned by positioning nails so as to prevent the laminated wood from displacing under the action of external force and under the condition of abnormal working conditions; the angle steel of the upper clamping piece of high-low voltage is slotted, so that the lead wires of high-low voltage are led out upwards, the space at the upper end of the coil is reasonably utilized, the volume of the transformer is reduced, the production cost is reduced, and reinforcing ribs are additionally welded on the upper clamping piece of high-low voltage and the lower clamping piece of high-low voltage, so that the strength of the clamping piece is prevented from being reduced due to the fact that the lead wires of high-low voltage are axially led out and slotted; the high-low voltage upper clamping piece is welded with a lead clamp bracket so as to facilitate the fixation of the outgoing line of the high-low voltage lead; after the assembly is completed, whether the upper clamp, the lower clamp, the left clamp and the right clamp of the transformer body are symmetrically assembled or not is checked, and the opening on the long pad foot on the lower clamp and the positioning nail at the bottom of the oil tank are positioned with the oil tank when the oil tank is arranged below the transformer body, so that the shaking of the transformer body during the transportation is prevented.

Compared with the prior art, the utility model has the beneficial effects that: compared with the channel steel clamping piece fixing mode of the laminated core high overload transformer in the prior art, the angle steel clamping piece structure is designed based on a three-phase four-frame five-column planar wound core; the upper clamping piece and the lower clamping piece are fixed and limited in a multiple mode through the pull screw rod, the pressing beam, the pad foot, the positioning nail and the side clamping piece, when the transformer is under the action of external force or under abnormal working conditions in the transportation process and the lifting process, the clamping piece can avoid the stress deformation of a coil and an iron core, and the capacity of resisting sudden short circuit of the transformer is effectively enhanced; after the transformer adopts the design scheme of the clamping piece, the space of the upper end part of the coil is reasonably utilized, the high-low voltage lead is axially led out, the wiring is convenient, the radial space of the coil is favorable for the heat dissipation of a high-overload transformer with high load and high temperature rise, the volume of an oil tank is reasonably reduced, and the manufacturing and production cost is reduced.

It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides an oily formula distribution transformer's folder structure, its characterized in that, a set of pad foot including parallel arrangement, fill up and connect two lower folder that are parallel to each other perpendicularly on the foot, the both ends of folder are respectively through connecting a hanging plate and connecting a other folder, two down the top of other folder connect respectively through connecting the hanging plate two with the punch holder that the folder is parallel down, the punch holder divide into a high-pressure punch holder and a low pressure punch holder, the high-pressure punch holder with be provided with the pressure roof beam between the low pressure punch holder, be provided with earthing lug connecting stud on the low pressure punch holder, the high pressure punch holder with the both ends of low pressure punch holder are provided with the hanging plate respectively, be provided with the hole for hoist on the hanging plate.

2. A clip structure for an oil filled distribution transformer according to claim 1, wherein the high and low pressure upper clips are welded with reinforcing ribs.

3. A clip structure for an oil filled distribution transformer according to claim 1, wherein the lower clip is connected and fixed to the foot pad by an angle iron.

4. A clip structure for an oil filled distribution transformer according to claim 1, wherein the high pressure upper clamping plate and the low pressure upper clamping plate have screw holes at corresponding positions on the lower clamping member.

5. A clip construction for an oil filled distribution transformer according to claim 1, wherein two pairs of wire clip brackets are provided on the upper clamping plate and on the lower clamping plate.

6. A clip structure for an oil filled distribution transformer according to claim 1, wherein a pull screw is provided between two side clips located on the same side.