Search

CN-122025352-A - Twelve-point pressing tool for transformer body and application method

CN122025352ACN 122025352 ACN122025352 ACN 122025352ACN-122025352-A

Abstract

The invention belongs to the technical field of transformers, and discloses a twelve-point pressing tool for a transformer body and a using method thereof, wherein the tool comprises a second reinforcing plate and a first reinforcing plate which are arranged on the left side and the right side of the center of the top of a coil pressing plate of the transformer; the transformer comprises a first reinforcing plate, a second reinforcing plate, a low-voltage side clamping piece, a high-voltage side clamping piece, two first reinforcing plates, a pressing module and a pressing module, wherein the first reinforcing plate is arranged on the outer side of the first reinforcing plate, one of the front side and the rear side of the center of the top of the coil pressing plate is provided with the low-voltage side clamping piece, the other side of the center of the top of the coil pressing plate is provided with the high-voltage side clamping piece, the two first reinforcing plates are positioned on the left side and the right side of the coil pressing plate of the transformer, and the two second reinforcing plates are positioned on the front side and the rear side of the coil pressing plate of the transformer and are connected through the pressing module. The invention can solve the problems of uneven pressure distribution and poor adaptability of the traditional four-point and six-point compression structure, and realize the expansion of the number of compression points, the optimization of pressure uniformity and the improvement of the size adaptation capability of the body.

Inventors

  • SHEN ZHANGPING
  • ZHANG YING
  • LI XIANG
  • MA XUEQIAN

Assignees

  • 常州西电变压器有限责任公司
  • 中国西电电气股份有限公司

Dates

Publication Date
20260512
Application Date
20251121

Claims (10)

  1. 1. The utility model provides a twelve-point pressing tool for a transformer body, which is characterized by comprising a first reinforcing plate (11) and a second reinforcing plate (12), wherein the left side and the right side of the top center of a coil pressing plate (3) of the transformer are respectively provided with the second reinforcing plate (12) and the first reinforcing plate (11), the second reinforcing plate (12) is arranged on the outer side of the first reinforcing plate (11), one of the front side and the rear side of the top center of the coil pressing plate (3) is provided with a low-voltage side clamping piece (4), the other side is provided with a high-voltage side clamping piece (5), the first reinforcing plate (11) comprises a horizontal plate with two vertical plates which are vertically connected with each other at two ends, the second reinforcing plate (12) comprises a vertical plate and a horizontal plate which are vertically connected with each other, the two first reinforcing plates (11) which are respectively positioned at the left side and the right side of the coil pressing plate (3) of the transformer are respectively connected through a pressing module (6), the bottom of the pressing module (6) can be placed at least at the front side and the rear side of the coil pressing plate (3) of the transformer, the left side and the left side of the coil pressing plate (3) which is respectively positioned at the two front side and the right side of the coil pressing plate (3) of the transformer are respectively connected with the left side and the left side of the first reinforcing plate (12) which are respectively positioned at the front side and the right side of the two reinforcing plates (12), the bottom of the compression module (6) can be provided with at least one jack (1), two ends of the left side and the right side of the low-pressure side clamping piece (4) which are positioned at the center of the top of the coil pressing plate (3) can be provided with at least one jack (1), and two ends of the left side and the right side of the high-pressure side clamping piece (5) which are positioned at the center of the top of the coil pressing plate (3) can be provided with at least one jack (1).
  2. 2. The transformer body twelve-point pressing tool according to claim 1, wherein a through hole is formed in the center of the coil pressing plate (3), and the end portion of a core column of the iron core (2) of the transformer penetrates out of the through hole of the coil pressing plate (3).
  3. 3. The twelve-point pressing tool for the transformer body according to claim 1, wherein the two first reinforcing plate members (11) are parallel to each other, the two second reinforcing plate members (12) are parallel to each other, and the first reinforcing plate members (11) and the second reinforcing plate members (12) are parallel to each other.
  4. 4. The transformer body twelve-point pressing tool according to claim 1, wherein the bottom of the pressing module (6), the bottom of the low-voltage side clamping piece (4) and the bottom of the high-voltage side clamping piece (5) are all at the same height.
  5. 5. The transformer body twelve-point pressing tool according to claim 1, wherein a hanging ring or a hanging hole for hanging is arranged at the top end of the pressing module (6).
  6. 6. The twelve-point pressing tool for the transformer body according to claim 1, wherein the pressing module (6) is provided with a fixing hole, and two sides of the pressing module (6) are fixedly connected with the first reinforcing plate (11) or the second reinforcing plate (12) through a screw mechanism (9) arranged in the fixing hole.
  7. 7. The transformer body twelve-point pressing tool according to claim 1 is characterized in that steel plates (8) are arranged below two ends of the left side and the right side of the center of the top of the coil pressing plate (3) of the high-voltage side clamping piece (5), steel plates (8) are arranged below two ends of the left side and the right side of the center of the top of the coil pressing plate (3) of the low-voltage side clamping piece (4), and the top of the steel plates (8) is used for placing a jack (1) for supporting the high-voltage side clamping piece (5) and supporting the low-voltage side clamping piece (4).
  8. 8. A twelve-point pressing tool for a transformer body according to claim 7, wherein the steel plate (8) and the second reinforcing plate (12) are parallel to each other, and the two second reinforcing plates (12) are parallel to each other.
  9. 9. A twelve-point pressing tool for a transformer body according to claim 1, wherein the low-voltage side clamping member (4) and the high-voltage side clamping member (5) are parallel to each other.
  10. 10. The method for using the twelve-point pressing tool for the transformer body of any one of claims 1 to 9, which is characterized by comprising the following steps: Placing the jacks (1) at preset compression positions to enable the jacks (1) to be in a state of contacting with all tools but not exerting pressure, wherein at least two jacks (1) are respectively arranged at the bottoms of two compression modules (6) between two first reinforcement plates (11), at least one jack (1) is respectively arranged at the bottoms of four compression modules (6) between the first reinforcement plates (11) and the second reinforcement plates (12), at least one jack (1) is respectively arranged at the left side and the right side of a low-pressure side clamping piece (4) which are positioned at the center of the top of a coil pressing plate (3), and at least one jack (1) is respectively arranged at the left side and the right side of a high-pressure side clamping piece (5) which are positioned at the center of the top of the coil pressing plate (3); Simultaneously, pressurizing the at least twelve jacks (1) slowly and repeatedly, and compressing the coil to a preset height through the coil pressing plate (3); and (3) compacting after finishing, and removing the jack (1) and the transformer body twelve-point compacting tool.

Description

Twelve-point pressing tool for transformer body and application method Technical Field The invention belongs to the technical field of transformers, and particularly relates to a twelve-point pressing tool for a transformer body and a using method of the twelve-point pressing tool. Background The short-circuit resistance of a large power transformer is a core index for measuring the reliability of the large power transformer, and the optimization of a body compression process is a key link for improving the performance. In the traditional process, the transformer body is tightly pressed mainly by a four-point pressing structure, namely four pressing points are symmetrically arranged between a clamping piece web plate and a body pressing plate, but the coil pressing plate in the pressing process is required to bear high local stress, the uneven pressure born by the coil pressing plate can cause uneven stress of a coil, coil buckling deformation and insulating laminated plate cracking are easy to be caused, a good pressing effect is not achieved, a special angle plate is often required to be welded on the clamping piece web plate for press mounting of the transformer body, not only the space of the unnecessary clamping piece web plate is occupied, but also the welding strength of the angle plate and the welding seam of the angle plate is very tested. As transformers increase in capacity and size, the limitations of such structures become increasingly significant. The patent application with the Chinese patent publication number of CN115497734A and the patent name of a transformer body compressing tool structure and a method, discloses a transformer body compressing tool structure and a method, and can overcome the problem that axial compressing height is limited and avoid the problem that radial areas of a transformer body are too concentrated, but only optimize edge pressure points to optimize a force transmission path, and cannot well solve the problem that stress is uneven when a transformer coil is compressed. The Chinese patent publication No. CN116741517A, the patent name is a patent application of a transformer body compressing tool and a using method, although the proposed six-point compressing tool optimizes the pressure distribution through a chute adjusting tool, the upper clamping piece is overlarge in bearing stress, the number and distribution of compressing points are still insufficient to be suitable for a super-large-diameter transformer body, the compressing force attenuation of an edge area is obvious, the compressing force is obviously reduced depending on the pressure transmitted by a middle long rod piece, and the strength requirement on the middle long rod piece is high. Disclosure of Invention In order to overcome the problems in the prior art, the invention aims to provide a twelve-point compression tool for a transformer body and a use method thereof, and solves the problems of uneven pressure distribution and poor suitability of the traditional four-point and six-point compression structure through a modularized structural design, thereby realizing the expansion of the number of compression points, the optimization of pressure uniformity and the improvement of the size adaptation capability of the transformer body. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a twelve-point pressing tool for a transformer body, which comprises a first reinforcing plate and a second reinforcing plate, wherein the second reinforcing plate and the first reinforcing plate are arranged on the left side and the right side of the center of the top of a coil pressing plate of a transformer; the first reinforcing plate comprises a horizontal plate, the second reinforcing plate comprises a vertical plate and a horizontal plate which are vertically connected with each other, the two first reinforcing plates are respectively positioned at the left side and the right side of the coil pressing plate of the transformer and are respectively connected through a pressing module, at least two jacks can be placed at the bottom of the pressing module, the two second reinforcing plates are respectively positioned at the left side and the right side of the coil pressing plate of the transformer and are respectively connected through the pressing module and are respectively positioned at the left side and the right side of the coil pressing plate of the transformer, at least one jack can be placed at the bottom of the pressing module, and at least one jack can be placed at the bottom of the pressing module. Optionally, a through hole is formed in the center of the coil pressing plate, and the end part of the core column of the iron core of the transformer penetrates out of the through hole of the coil pressing plate. Optionally, the two first reinforced plate members are parallel to each other, the two second reinforced plate members are parallel to each