CN218159925U

CN218159925U - Pulling plate structure for transformer core

Info

Publication number: CN218159925U
Application number: CN202122023087.2U
Authority: CN
Inventors: 蔡子祥; 王向阳; 刘赛; 魏龙
Original assignee: Wuxi Putian Iron Core Co Ltd
Current assignee: Wuxi Putian Iron Core Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-12-27
Anticipated expiration: 2031-08-25

Abstract

The utility model belongs to the technical field of transformer core technique and specifically relates to a pulling plate structure for transformer core. The clamping device comprises an upper clamping piece and a lower clamping piece which are arranged in parallel, wherein a plurality of pull plates which are parallel to each other are arranged between the upper clamping piece and the lower clamping piece, and the pull plates are arranged perpendicular to the upper clamping piece and the lower clamping piece; the connecting pull plate of the upper clamping piece and the lower clamping piece is provided with an installation notch, a hook fixing plate is fixedly arranged in the installation notch, and a hook groove is formed in one end, facing the pull plate, of the hook fixing plate; the upper end and the lower end of the pulling plate are provided with hook plates facing one end of the hook fixing plate, the hook plates are provided with hook end faces facing the hook groove end faces, and the hook end faces can be connected with the hook grooves in an inosculating mode. The contact surface of the pulling plate and the upper and lower clamping pieces is more sufficient, the contact surface of the pulling plate and the upper and lower clamping pieces is naturally attached, the fixation is firm, and the structure stress is good; meanwhile, connecting parts such as cover plates and bolts are omitted, assembly is simplified, and the problem of difficulty in correction is solved.

Description

Pulling plate structure for transformer core

Technical Field

The utility model belongs to the technical field of transformer core technique and specifically relates to a pulling plate structure for transformer core.

Background

Along with the development of power systems in China, the capacity and the voltage grade of a single transformer are continuously improved, the quality of an iron core is continuously increased, and an upper clamping piece and a lower clamping piece are often connected by using pull plates in order to meet the requirements of lifting and carrying the iron core and the transformer body of the transformer and consider the assembly process. During operation of the transformer, eddy current losses occur in the metallic structural parts of the transformer due to the effect of the stray magnetic fields. The core pulling plate is positioned between the core lamination and the coil, and the core pulling plate is a high magnetic leakage area in the power transformer, so that excessive concentration of eddy current loss is easily caused, and local overheating is caused. How to ensure the strength of the pulling plate, simplify the assembly process and reduce the stray loss in the pulling plate is an important subject.

SUMMERY OF THE UTILITY MODEL

This application is directed against the shortcoming among the above-mentioned prior production technology, provides a rational in infrastructure arm-tie structure for transformer core, and the couple terminal surface can coincide with the couple groove and be connected, and the arm-tie is more abundant with upper and lower folder contact surface, and the arm-tie is laminated with upper and lower folder contact surface naturally, and is fixed firm, and the structure atress is good.

The utility model discloses the technical scheme who adopts as follows:

the pulling plate structure for the transformer core comprises an upper clamping piece and a lower clamping piece which are arranged in parallel, wherein a plurality of pulling plates which are parallel to each other are arranged between the upper clamping piece and the lower clamping piece, and the pulling plates are arranged perpendicular to the upper clamping piece and the lower clamping piece; the connecting pull plate of the upper clamping piece and the lower clamping piece is provided with an installation notch, a hook fixing plate is fixedly arranged in the installation notch, and a hook groove is formed in one end, facing the pull plate, of the hook fixing plate; the upper end and the lower end of the pulling plate are provided with hook plates facing one end of the hook fixing plate, the hook plates are provided with hook end faces facing the hook groove end faces, and the hook end faces can be connected with the hook grooves in an inosculating mode.

Furthermore, the number of the pull plates is three, the upper end parts of the three pull plates are respectively arranged at the left part, the middle part and the right part of the upper end surface of the upper clamping piece, and the lower end parts of the three pull plates are respectively arranged at the left part, the middle part and the right part of the upper end surface of the lower clamping piece.

Furthermore, an included angle A is formed between the hook end face and the vertical end face of the pulling plate, the included angle A is an acute angle, an included angle B is formed between the hook groove and the vertical end face of the hook fixing plate, and the included angle B is equal to the included angle A in angle, so that the hook end face can be connected with the hook groove in an inosculating mode.

Furthermore, the lower end face of the hook fixing plate protrudes out of the lower end faces of the upper clamp and the lower clamp, and the upper end face of the hook fixing plate is flush with the upper end faces of the upper clamp and the lower clamp.

Furthermore, a plurality of magnetic isolation grooves which are communicated up and down are formed in the surface of the pulling plate, and the plurality of magnetic isolation grooves are formed in the length direction of the pulling plate.

The beneficial effects of the utility model are as follows:

the utility model has compact and reasonable structure and convenient operation, and in the process of stress, the contact surface of the pulling plate and the upper and lower clamping pieces is more sufficient, the contact surface of the pulling plate and the upper and lower clamping pieces is naturally laminated, the fixation is firm, and the structure stress is good; meanwhile, connecting parts such as cover plates and bolts are omitted, assembly is simplified, and the problem of difficulty in correction is solved; the pulling plate has high tensile strength, ensures the mechanical strength and can effectively reduce the sectional area of the pulling plate, thus being beneficial to the design of the iron core section and the insulating part; the middle of the pulling plate is processed by slotting, so that the eddy current loss at the position is effectively reduced.

Drawings

Fig. 1 is a front perspective view of the present invention.

Fig. 2 is a back perspective view of the present invention.

Fig. 3 is a top view of the present invention.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.

Wherein: 1. an upper clamp; 2. a lower clamp; 3. pulling a plate; 4. a magnetism isolating groove; 5. a hook fixing plate; 6. a hook groove; 7. a hook plate; 8. the end surface of the hook.

Detailed Description

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

In the embodiment shown in fig. 1 and 2, the pulling plate structure for the transformer core mainly includes an upper clamping piece 1 and a lower clamping piece 2 which are arranged in parallel, a plurality of pulling plates 3 which are arranged in parallel are arranged between the upper clamping piece 1 and the lower clamping piece 2, and the plurality of pulling plates 3 are arranged perpendicular to the upper clamping piece 1 and the lower clamping piece 2.

In the embodiment shown in fig. 3 and 4, a mounting notch is formed at the position where the upper clip member 1 and the lower clip member 2 are connected with the pulling plate 3, a hook fixing plate 5 is fixedly arranged in the mounting notch, and a hook groove 6 is formed at one end of the hook fixing plate 5 facing the pulling plate 3. The upper end portion and the lower end portion of the pulling plate 3 are provided with a hook plate 7 facing one end of the hook fixing plate 5, the hook plate 7 is provided with a hook end face 8 facing the end face of the hook groove 6, and the hook end face 8 can be matched and connected with the hook groove 6 to limit the pulling plate 3 from moving up and down relative to the upper clamping piece 1 and the lower clamping piece 2.

In the embodiment shown in fig. 4, the hook end surface 8 and the vertical end surface of the pulling plate 3 form an included angle a, and the included angle a is an acute angle. An included angle B is formed between the vertical end faces of the hook groove 6 and the hook fixing plate 5, and the included angle B is equal to the included angle A in angle, so that the hook end face 8 can be connected with the hook groove 6 in an inosculating mode.

In the embodiment shown in fig. 2 and 4, the lower end surface of the hook fixing plate 5 protrudes from the lower end surfaces of the upper clamp 1 and the lower clamp 2, and the upper end surface of the hook fixing plate 5 is flush with the upper end surfaces of the upper clamp 1 and the lower clamp 2.

In the embodiment shown in fig. 1 and 2, there are three pulling plates 3, the upper ends of the three pulling plates 3 are respectively disposed at the left, middle and right parts of the upper end surface of the upper clamping piece 1, and the lower ends of the three pulling plates 3 are respectively disposed at the left, middle and right parts of the upper end surface of the lower clamping piece 2.

In the embodiment shown in fig. 1 and 2, a plurality of magnetic isolation grooves 4 are formed in the surface of the pulling plate 3 and penetrate up and down, and the plurality of magnetic isolation grooves 4 are formed along the length direction of the pulling plate 3. The arrangement of the magnetism isolating groove 4 can limit and reduce eddy current loss and eliminate local overheating.

In the process of stress, the contact surfaces of the pulling plate and the upper and lower clamping pieces are more sufficient, the contact surfaces of the pulling plate and the upper and lower clamping pieces are naturally attached, the fixation is firm, and the structure stress is good; meanwhile, connecting parts such as cover plates and bolts are omitted, assembly is simplified, and the problem of difficulty in correction is solved; the pulling plate has high tensile strength, ensures the mechanical strength and can effectively reduce the sectional area of the pulling plate, thus being beneficial to the design of the iron core section and the insulating part; the middle of the pulling plate is processed by slotting, so that the eddy current loss at the middle is effectively reduced.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides a drawplate structure for transformer core, includes parallel arrangement's last folder (1) and lower folder (2), its characterized in that: a plurality of pulling plates (3) which are parallel to each other are arranged between the upper clamping piece (1) and the lower clamping piece (2), and the pulling plates (3) are perpendicular to the upper clamping piece (1) and the lower clamping piece (2); the position, where the upper clamping piece (1) and the lower clamping piece (2) are connected with the pulling plate (3), of the clamping piece is provided with an installation notch, a hook fixing plate (5) is fixedly arranged in the installation notch, and one end, facing the pulling plate (3), of the hook fixing plate (5) is provided with a hook groove (6); the upper end and the lower end of the pulling plate (3) are provided with hook plates (7) facing one end of the hook fixing plate (5), the hook plates (7) are provided with hook end faces (8) facing the end faces of the hook grooves (6), and the hook end faces (8) can be matched and connected with the hook grooves (6).

2. The pulling plate structure for a transformer core according to claim 1, wherein: the number of the pull plates (3) is three, the upper end parts of the three pull plates (3) are respectively arranged at the left part, the middle part and the right part of the upper end surface of the upper clamping piece (1), and the lower end parts of the three pull plates (3) are respectively arranged at the left part, the middle part and the right part of the upper end surface of the lower clamping piece (2).

3. The pulling plate structure for a transformer core according to claim 1 or 2, characterized in that: couple terminal surface (8) and arm-tie (3) are an contained angle A between the vertical terminal surface, contained angle A is the acute angle, is a contained angle B between couple groove (6) and the vertical terminal surface of couple fixed plate (5), and contained angle B equals with contained angle A angle for couple terminal surface (8) can coincide with couple groove (6) and be connected.

4. The pulling plate structure for a transformer core according to claim 1 or 2, characterized in that: the lower end face of the hook fixing plate (5) protrudes out of the lower end faces of the upper clamping piece (1) and the lower clamping piece (2), and the upper end face of the hook fixing plate (5) is flush with the upper end faces of the upper clamping piece (1) and the lower clamping piece (2).

5. The pulling plate structure for a transformer core according to claim 1 or 2, characterized in that: the surface of the pulling plate (3) is provided with a plurality of magnetic isolation grooves (4) which are vertically communicated, and the plurality of magnetic isolation grooves (4) are arranged along the length direction of the pulling plate (3).