CN-115816722-B - Shaping device and manufacturing method of transformer insulating cylinder

CN115816722BCN 115816722 BCN115816722 BCN 115816722BCN-115816722-B

Abstract

The invention relates to the technical field of transformer manufacturing, in particular to a shaping device and a manufacturing method of a transformer insulating cylinder, wherein the manufacturing method firstly prepares an insulating material plate with a certain length into a round insulating cylinder with a definite perimeter, then stretches out two flat edges of the insulating cylinder to be shaped by utilizing the self-body material characteristic of the insulating material plate, and respectively puts the two flat edges into a flat gap between two shaping clamping plates in one group by utilizing the two groups of shaping clamping plates, the size of the shaping clamp plate meets the requirement that the width of the straight gap is equal to the width of the straight edge, the height of the straight gap is larger than or equal to the height of the straight edge, the tension of the insulating cylinder is utilized to keep the overall stability of the two groups of shaping clamp plates, or a fixed structure is connected between the two groups of shaping clamp plates, so that the two groups of shaping clamp plates and the insulating cylinder keep the overall stability, and finally the whole is put into an oven for hot drying and shaping, so that the technical problems of high processing cost and inconvenient movement of an oblong insulating cylinder shaping die in the prior art are mainly solved.

Inventors

WANG JINDE
FU WEIDONG
SUN MINGJIE
TANG RIQIANG
Yue Kunfeng
JIN LONG
WANG CHONGXING
GUO JINYUAN
LI ZHANLI
YANG LILI

Assignees

许继变压器有限公司

Dates

Publication Date: 20260508
Application Date: 20221024

Claims (10)

1. A manufacturing method of a transformer insulating cylinder is characterized in that firstly, an insulating material plate with a certain length is manufactured into a round insulating cylinder (1) with a definite circumference, then two straight edges to be formed of the insulating cylinder (1) are stretched out by utilizing the characteristic of the insulating material plate, the two straight edges are respectively placed into a straight gap between the two shaping clamping plates (2) in one group by utilizing the two shaping clamping plates (2), the size of the shaping clamping plates (2) meets the condition that the width of the straight gap is equal to the width of the straight edge, the height of the straight gap is larger than or equal to the height of the straight edge, the integral stability of the two shaping clamping plates (2) is maintained by utilizing the tension of the insulating cylinder (1), or a fixed structure is connected between the two shaping clamping plates (2) to ensure that the two shaping clamping plates (2) and the insulating cylinder maintain the integral stability, the two ends of an operating rod respectively penetrate through the top ends of the two shaping clamping plates and are hung on a supporting frame, and finally, the whole body is placed into an oven for heat drying and shaping.
2. The shaping device of the transformer insulating cylinder is characterized by comprising a support frame, an operating rod and two groups of shaping clamping plates (2), wherein each group comprises two shaping clamping plates (2) arranged in parallel at intervals, a flat gap which is used for being matched with the wall thickness of an insulating material plate of the formed insulating cylinder (1) is formed between the two shaping clamping plates (2) in one group, so that a flat edge to be formed of the round insulating cylinder (1) can be placed in the round insulating cylinder, the width of the flat gap is equal to the width of the flat edge, the height of the flat gap is greater than or equal to the height of the flat edge, the two groups of shaping clamping plates (2) are kept in integral stability by utilizing the self tension of the insulating cylinder (1), or a fixing structure is connected between the two groups of shaping clamping plates (2) so that the two groups of shaping clamping plates (2) and the insulating cylinder (1) keep integral stability, and the two ends of the operating rod respectively penetrate through the top ends of the two groups of shaping clamping plates and are hung on the support frame.
3. The sizing apparatus of a transformer insulation cylinder according to claim 2, wherein the operating rod is a screw rod to increase friction between the sizing clamp plate and the operating rod by threads on the operating rod.
4. The sizing device of the transformer insulation cylinder according to claim 2, wherein the supporting frame is a cylindrical structure surrounded by four side plates or comprises two triangular frames which are oppositely arranged and fixed at the bottom, and a fixing groove for placing an operating rod is formed at the top of each triangular frame.
5. The sizing device of the transformer insulation cylinder according to claim 2, wherein the supporting frame (4) is of a frame structure and comprises an upper frame (41), a lower frame (42) and a stand column (43) connected between the upper frame (41) and the lower frame (42), the upper frame (41) and the lower frame (42) respectively comprise two cross beams and two longitudinal beams, and two ends of the operating rod penetrating out of the sizing clamping plates are respectively used for being hung on the two cross beams or the two longitudinal beams of the upper frame (41).
6. A sizing device for insulating cylinders of transformers according to any of claims 2-5, characterized in that a spacer (5) is clamped between the bottoms of two sizing splints (2) in a group, the thickness of the spacer (5) is the same as the wall thickness of the insulating material plate to control said flat gap, and the top surface of the spacer (5) is used for supporting the insulating cylinder (1), and an opening for the insertion of said flat edge is formed between the top ends of two sizing splints (2) in a group.
7. The shaping device of a transformer insulation cylinder according to claim 6, characterized in that the backing plate (5) is fixedly connected with two shaping clamping plates (2) of a group by means of rivets (6).
8. A sizing device for a transformer insulation cylinder according to claim 6, characterized in that the sizing device further comprises clamping means for clamping the top ends of two sizing clamping plates (2) in a group.
9. A sizing device for a transformer insulation cylinder according to any one of claims 2-5, characterized in that the sizing clamp plates (2) for being arranged inside the flat sides in each group of sizing clamp plates (2) are defined as inside sizing clamp plates, and both ends of the inside sizing clamp plates in the width direction are respectively provided with turned-over edges (21) turned towards the inside.
10. The shaping device of a transformer insulation cylinder according to any one of claims 2-5, characterized in that in each set of shaping splints (2) is defined that the shaping splints (2) for being arranged inside the straight sides are inner shaping splints, the shaping splints (2) for being arranged outside the straight sides are outer shaping splints, both ends of the inner shaping splints in the width direction are respectively provided with turned-over edges (21) turned inwards, and both ends of the outer shaping splints in the width direction are respectively provided with turned-over edges (21) turned outwards.

Description

Shaping device and manufacturing method of transformer insulating cylinder Technical Field The invention relates to the technical field of transformer manufacturing, in particular to a shaping device and a manufacturing method of a transformer insulating cylinder. Background The transformer coil comprises low-voltage coil and high-voltage coil, in order to prevent the electricity that crosses between low-voltage coil and the high-voltage coil, installs the insulating cylinder between low-voltage coil and the high-voltage coil, and common insulating cylinder is the insulating cylinder of PET material. PET is short for polyethylene terephthalate, is the most important variety in thermoplastic polyesters, and is commonly called polyester resin. PET is a milky or pale yellow, highly crystalline polymer with a smooth and glossy surface. The alloy has excellent physical and mechanical properties in a wider temperature range, can be used for 120 ℃ for a long time, has excellent electrical insulation, and even under high temperature and high frequency, has better electrical property, but has poor corona resistance, and has good creep resistance, fatigue resistance, friction resistance and dimensional stability. The existing processing mode of the oblong insulating cylinder is generally to use an oblong shaping die for processing, the oblong shaping die is formed by rolling a steel plate into an oblong cylinder shape or directly processing a steel block into an oblong cylinder shape, a PET insulating plate is wrapped on the oblong shaping die, two ends of the butt joint are fixed by using shaping adhesive tapes, and then the die is put into an oven for heat drying shaping, and demoulding is carried out after shaping to form the oblong insulating cylinder. The long round insulating cylinder shaping mode is used for customizing shaping dies of different models according to insulating cylinders of different models, and the dies need to contact the whole insulating cylinder, so that the dies are made of more materials, the overall processing cost is high, the shaping dies are heavy, and the moving of the shaping dies in the production and processing process is inconvenient. Disclosure of Invention The invention aims to provide a manufacturing method of a transformer insulating cylinder, which aims to solve the technical problems that in the prior art, an oblong insulating cylinder shaping die needs to be contacted with the whole insulating cylinder, used materials are more, the overall processing cost is higher, the shaping die is heavy, and the movement is inconvenient in the production and processing process, and the invention also aims to provide a shaping device of the transformer insulating cylinder, so as to solve the problems. In order to achieve the above purpose, the manufacturing method of the transformer insulation cylinder of the invention adopts the following technical scheme: A method for manufacturing insulating cylinder of transformer includes preparing insulating material plate with a certain length into circular insulating cylinder with definite circumference, stretching out two flat edges to be formed of insulating cylinder by utilizing characteristics of insulating material plate, putting two flat edges into flat gaps between two shaping clamping plates in a group, setting plate size to meet width of flat gap to be equal to width of flat edge, setting height of flat gap to be greater than or equal to height of flat edge, utilizing tension of insulating cylinder to keep integral stability of two groups of shaping clamping plates, or connecting fixing structure between two groups of shaping clamping plates to keep integral stability of two groups of shaping clamping plates and insulating cylinder, and finally putting whole into baking oven for heat drying shaping. The insulating cylinder manufacturing method has the advantages that the insulating cylinder manufacturing method is designed expansively, firstly, the insulating material plates with a certain length are manufactured into the round insulating cylinder with the determined circumference, the flat edges are fixed by using the shaping clamping plates after the flat edges are stretched out from two opposite sides of the insulating cylinder, the insulating cylinder with the determined circumference can be manufactured only by the insulating material plates with the determined length, the insulating cylinder with the determined circumference can form a long round shape with stable size due to the elastic follow tension generated by the material characteristics of the insulating material plates, the formed long round insulating cylinder with stable size is required, the size of the shaping clamping plates is required to meet the width of the flat edges, the height of the flat edges is larger than or equal to the height of the flat edges, the flat edges of the insulating cylinder are guaranteed to be completely covered and shaped, and for materials w