CN113921267A

CN113921267A - Oil-immersed transformer coil press-fitting tool

Info

Publication number: CN113921267A
Application number: CN202111089695.1A
Authority: CN
Inventors: 王才杰
Original assignee: Chongqing Taisheng Intelligent Electric Co ltd
Current assignee: Chongqing Taisheng Intelligent Electric Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-01-11

Abstract

The invention relates to the technical field of transformer coil press-fitting, in particular to a press-fitting tool for an oil-immersed transformer coil. The invention discloses a coil press-mounting tool for an oil-immersed transformer, which comprises a base, wherein a supporting screw rod is connected to the base, and a press-mounting seat is supported by an upper end bolt of the supporting screw rod; the adjacent surfaces of the press-fitting seat and the base are respectively provided with opposite arc-shaped guard plates, the two ends of each arc-shaped guard plate are provided with arc-shaped surfaces matched with the coils, and a space for placing the coils is formed between the two arc-shaped guard plates. The invention aims to solve the technical problem that the existing press-fitting device cannot ensure the arc shapes of the two ends of the coil.

Description

Oil-immersed transformer coil press-fitting tool

Technical Field

The invention relates to the technical field of transformer coil press-fitting, in particular to a press-fitting tool for an oil-immersed transformer coil.

Background

Along with the rapid development of economy in China, the power demand is increasing day by day, simultaneously, the country advocates energy conservation and environmental protection, the safety of power products and power grids is particularly emphasized, energy-saving oil-immersed distribution transformers become the leading products of urban distribution network systems, the power grids also clearly require that transformer products need to be energy-saving and have the provision of strong sudden short circuit resistance, and the market competition is strong at present.

The traditional transformer coil is not subjected to press-fitting shaping in the manufacturing process, and a large number of gaps inevitably exist between coil layers, so that the transformer is large in size and relatively high in cost. In later manufacturing, a technician only uses a mallet to knock the short shaft of the coil during winding, but due to the fact that the coil is high in hardness, one surface of the coil is knocked flat, the other surface of the coil is arched, the rebound of the coil cannot be completely eliminated, the efficiency is low, and the quality of a product is difficult to guarantee by using a manual knocking mode. The current common pressing device adopts a pressing table arranged in parallel to extrude the coil, so that the problem that a large number of gaps exist between layers of the coil can be solved; however, in the current situation that the elliptical and oblong coils are mainly used in the existing oil-immersed transformer, the existing press-fitting device cannot ensure the arc shapes of the two ends of the coil, and the magnetic field distribution of the coil is influenced, so that short circuit is caused and the product quality is influenced.

Therefore, the technical personnel in the field are dedicated to developing the press fitting tool for the coil of the oil-immersed transformer.

Disclosure of Invention

In view of the defects in the prior art, the invention discloses a press fitting tool for an oil-immersed transformer coil, and aims to solve the technical problem that the existing press fitting device cannot ensure the arc shapes of two ends of the coil.

In order to achieve the purpose, the invention provides a coil press-mounting tool for an oil-immersed transformer, which comprises a base, wherein a supporting screw rod is connected onto the base, and a press-mounting seat is supported on an upper end bolt of the supporting screw rod; the adjacent surfaces of the press-fitting seat and the base are respectively provided with corresponding arc-shaped guard plates, arc-shaped surfaces matched with the coils are arranged at two ends of each arc-shaped guard plate, and a space for placing the coils is formed between the two arc-shaped guard plates.

Preferably, the base and the press mounting seat are identical in structure and arranged oppositely, the base and the press mounting seat respectively comprise a pressing plate, the arc-shaped guard plate is fixedly mounted on the inner side of the pressing plate, a transverse reinforcing plate and a longitudinal reinforcing plate are arranged on the outer side of the pressing plate, and mounting holes for mounting the supporting screws are formed in the pressing plate.

Preferably, the number of the transverse reinforcing plates is two, the transverse reinforcing plates are arranged at equal intervals along the length direction of the pressing plate, the number of the longitudinal reinforcing plates is 9, and the longitudinal reinforcing plates are uniformly fixed between the two transverse reinforcing plates and on two sides of the two transverse reinforcing plates.

Preferably, the height of the transverse reinforcing plate is the same as that of the longitudinal reinforcing plate, and the height of the transverse reinforcing plate is greater than that of the end of the supporting screw.

Preferably, the number of the arc-shaped guard plates is three.

Preferably, the supporting screw rod is arranged in the center of the short sides of the base and the press-fitting seat.

Preferably, the upper surface of pressure equipment seat is provided with rings, the quantity of rings is two and is diagonal arrangement on the pressure equipment seat.

Preferably, the support screw is sleeved with two groups of support nuts and fastening nuts, the support nuts are located on the lower side of the pressing plate, and the fastening nuts are located on the upper side of the pressing plate.

The invention has the beneficial effects that:

through the design of this pressure equipment frock, the shape of arc backplate is identical with circular-arc at coil both ends, and the arc backplate is processed according to the oval radian of side of coil promptly, guarantees that pressure equipment and fastening back coil do not warp, can prevent to change the project organization of coil, avoids influencing the magnetic field distribution of coil to arouse short circuit scheduling problem. The press-fitting tool has the advantages of simple structure, low cost, effective compression of coil size, no rebound, good press-fitting effect and no damage to the outer surface of the coil, which is proved by practice; meanwhile, the short-circuit resistance of the transformer can be improved, the transformer with larger capacity can be manufactured according to the structure by only increasing the model specifications of the steel plate and the protection plate, and the method has universality.

Drawings

FIG. 1 is a schematic front view of the overall structure of an embodiment of the present invention;

FIG. 2 is a left side schematic view of the overall structure of the present invention;

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

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged schematic view of the arcuate shield of the present invention.

In the above drawings: 1. a base; 11. pressing a plate; 12. a transverse stiffener; 13. a longitudinal reinforcing plate; 2. a support screw; 21. a support nut; 22. fastening a nut; 3. a press mounting seat; 31. a hoisting ring; 4. an arc-shaped guard plate; 5. and a coil.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the invention provides a press-fitting tool for an oil-immersed transformer coil, which comprises a base 1, wherein a support screw 2 is connected to the base 1, and a press-fitting seat 3 is supported by an upper end bolt of the support screw 2; as shown in fig. 4, the adjacent surfaces of the press-fitting seat 3 and the base 1 are respectively provided with corresponding arc-shaped protection plates 4, as shown in fig. 5, the arc-shaped protection plates 4 are made of laminated wood plates with the thickness of 20mm, the two ends of the arc-shaped protection plates 4 are provided with arc-shaped surfaces matched with the coils 5, and a space for placing the coils 5 is formed between the two arc-shaped protection plates 4. The laminated wood board is convenient to process, and can prevent the coil 5 from being damaged when the coil 5 is pressed.

In this embodiment, through the design of this pressure equipment frock, the shape of arc backplate 4 is identical with the circular-arc at 5 both ends of coil, and arc backplate 4 processes according to the oval radian of side of coil 5 promptly, guarantees that pressure equipment and fastening back coil 5 is indeformable, can prevent to change coil 5's project organization, avoids influencing coil 5's magnetic field distribution to arouse the short circuit scheduling problem as far as. The arc-shaped protection plate 4 and the pressing plate 11 are mutually independent, so that the arc-shaped protection plate 4 can be conveniently replaced according to the coils 5 with different radians. The press-mounting tool is simple and convenient in structure and low in cost, and practices prove that the size of the coil 5 can be effectively compressed, the rebound is avoided, the press-mounting effect is good, and the outer surface of the coil 5 is not damaged; meanwhile, the short-circuit resistance of the transformer can be improved, the transformer with larger capacity can be manufactured according to the structure by only increasing the model specifications of the steel plate and the protection plate, and the method has universality.

As shown in fig. 2 and 3, the base 1 and the press-fitting seat 3 have the same structure and are arranged oppositely, the base 1 and the press-fitting seat 3 both include a pressing plate 11, an arc-shaped guard plate 4 is installed on the inner side of the pressing plate 11, and a transverse reinforcing plate 12 and a longitudinal reinforcing plate 13 are arranged on the outer side of the pressing plate 11. Support screw 2 sets up in the central authorities of the minor face of base 1 and pressure equipment seat 3, is equipped with the mounting hole of installation support screw 2 on the clamp plate 11, and the cover is equipped with two sets of support nut 21 and fastening nut 22 on the support screw 2, and support nut 21 all is located the downside of clamp plate 11, and fastening nut 22 all is located the upside of clamp plate 11 to the interval between convenient to adjust pressure equipment seat 3 and the base 1, and utilize fastening nut 22 extrusion coil 5. Specifically, the number of horizontal reinforcing plate 12 is two, and horizontal reinforcing plate 12 arranges along the length direction equidistance of clamp plate 11, and the number of vertical reinforcing plate 13 is 9, and vertical reinforcing plate 13 is evenly fixed in between two horizontal reinforcing plates 12 and both sides, plays the effect that increases clamp plate 11's intensity. Further, the transverse reinforcement plate 12 and the longitudinal reinforcement plate 13 are the same in height, and the transverse reinforcement plate 12 and the longitudinal reinforcement plate 13 are greater in height than the end of the support screw 2 so as to leave a space for adjusting the nut on the support screw 2.

As shown in fig. 1, the number of the arc-shaped protection plates 4 is three, and for a conventional transformer with three coils 5, the coils 5 in one transformer can be simultaneously pressed and baked at one time, and the same pressing effect can be ensured.

As shown in fig. 2, the upper surface of the press-fitting seat 3 is provided with two hanging rings 31, and the two hanging rings 31 are diagonally arranged on the press-fitting seat 3, so that the tool can be conveniently lifted and baked.

During the operation, at first place welded base 1 subaerial, notice the one side of clamp plate 11 up, place three arc backplate 4 on the clamp plate 11 of base 1 again, place three coil 5 that need the pressure equipment on arc backplate 4 in proper order, three arc backplate 4 is placed equally to the top surface of coil 5, pushes down arc backplate 4 to the clamp plate 11 face down of pressure equipment seat 3 again. And finally, the supporting screw rod 2 penetrates into the mounting hole, the whole press fitting tool is hoisted to a press machine equipment operating platform to carry out pressure equalizing press fitting on the base 3, and finally, the whole press fitting tool is locked by a supporting nut 21 and a fastening nut 22 and then integrally moved into a drying oven to be baked and shaped.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. Oil-immersed transformer coil pressure equipment frock, its characterized in that: the press mounting device comprises a base (1), wherein a supporting screw rod (2) is connected to the base (1), and a press mounting seat (3) is supported by an upper end bolt of the supporting screw rod (2); opposite arc-shaped guard plates (4) are respectively arranged on the adjacent surfaces of the press-fitting seat (3) and the base (1), arc-shaped surfaces matched with the coils (5) are arranged at the two ends of each arc-shaped guard plate (4), and a space for placing the coils (5) is formed between the two arc-shaped guard plates (4).

2. The oil-filled transformer coil press fitting tool according to claim 1, characterized in that:

the structure of base (1) and pressure equipment seat (3) is the same and be relative arrangement, and base (1) and pressure equipment seat (3) all include clamp plate (11), the inboard installation of clamp plate (11) arc backplate (4), the outside of clamp plate (11) is equipped with horizontal reinforcing plate (12) and vertical reinforcing plate (13), be equipped with the installation on clamp plate (11) the mounting hole of supporting screw (2).

3. The oil-filled transformer coil press fitting tool of claim 2, wherein:

the quantity of horizontal reinforcing plate (12) is two, and horizontal reinforcing plate (12) are arranged along the length direction equidistance of clamp plate (11), the quantity of vertical reinforcing plate (13) is 9, and vertical reinforcing plate (13) are evenly fixed in between two horizontal reinforcing plate (12) and both sides.

4. The oil-filled transformer coil press fitting tool of claim 2, wherein:

the height of the transverse reinforcing plate (12) is the same as that of the longitudinal reinforcing plate (13), and the height of the transverse reinforcing plate (12) is larger than that of the longitudinal reinforcing plate (13) than that of the end part of the support screw rod (2).

5. The oil-filled transformer coil press fitting tool of claim 2, wherein:

the number of the arc-shaped guard plates (4) is three.

6. The oil-filled transformer coil press fitting tool according to claim 1, characterized in that:

the supporting screw rod (2) is arranged in the center of the short sides of the base (1) and the press-fitting seat (3).

7. The oil-filled transformer coil press fitting tool according to claim 1, characterized in that:

the upper surface of pressure equipment seat (3) is provided with rings (31), the quantity of rings (31) is two and is diagonal arrangement on pressure equipment seat (3).

8. The oil-filled transformer coil press fitting tool according to claim 1, characterized in that:

the support screw rod (2) is sleeved with two groups of support nuts (21) and fastening nuts (22), the support nuts (21) are located on the lower side of the pressing plate (11), and the fastening nuts (22) are located on the upper side of the pressing plate (11).