CN-122025367-A - Transformer core drawplate structure with shielding function

CN122025367ACN 122025367 ACN122025367 ACN 122025367ACN-122025367-A

Abstract

The invention relates to the technical field of transformers, in particular to a transformer iron core tape plate structure with a shielding function, which comprises an iron core tape plate and a fixed plate fixedly arranged on the outer side of the iron core tape plate, wherein iron core tape plate end fasteners are arranged in the iron core tape plate in a penetrating manner, and the iron core tape plate, the end parts of the fixed plate and edges of the iron core tape plate and the fixed plate are in chamfer structures; according to the invention, all edges of the iron core ribbon board formed after the iron core ribbon board and the fixing plate are welded are chamfered, the sharp right-angle edges are converted into smooth transitional circular arcs, the electric field intensity around the ribbon board can be obviously reduced, excessive concentration of field intensity is avoided, the thickness of the ribbon board is increased by welding a fixing plate with a specific size on the outer side of the iron core ribbon board with the original thickness, a stepped shielding body is formed by a groove of the fixing plate and a mounting groove of the iron core ribbon board, and the iron core ribbon end fastener is completely embedded in the ribbon board and is not exposed to an external electric field.

Inventors

WANG YUYAO
LI ZHUOLUN
ZHANG YUE
YANG XIN
WANG YONGQIANG
SUN LIANG
ZHANG JING
WANG HAIFENG
YANG YUZHAO

Assignees

保定天威保变电气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260108

Claims (4)

1. The transformer iron core strip plate structure with the shielding function comprises an iron core strip plate (1) and is characterized by further comprising a fixing plate (2) fixedly arranged on the outer side of the iron core strip plate (1), iron core strip end fasteners (3) are arranged in the iron core strip plate (1) in a penetrating mode, and the iron core strip plate (1) and the end portions and edges of the fixing plate (2) are in chamfering structures.
2. The transformer core strap plate structure with the shielding function according to claim 1, wherein the core strap plate (1) is welded and fixed with the fixing plate (2), a groove (4) is formed in the fixing plate (2), a mounting groove (5) is reserved in the core strap plate (1), and the groove (4) corresponds to the mounting groove (5).
3. A transformer core strap plate structure with shielding function according to claim 2, characterized in that the recess (4) and the mounting groove (5) form a stepped shield.
4. The transformer core strap plate structure with shielding function according to claim 3, wherein the core strap end fastener (3) penetrates through the groove (4) and the mounting groove (5), and the tail end of the core strap end fastener (3) is located inside the groove (4).

Description

Transformer core drawplate structure with shielding function Technical Field The invention relates to the technical field of transformers, in particular to a transformer core drawplate structure with a shielding function. Background Iron core drawplates are used in a large number of devices such as power transformers and large reactors, and are key supporting components for fastening the power transformers, and the design of the iron core drawplates directly influences the electrical performance and the operational reliability of the devices. The prior drawstring board has a corner angle at present, in high-voltage electrical equipment, any sharp metal edge can cause field intensity distortion, the edge of the drawstring board structure with traditional thickness is usually right angle, and the drawstring fastener is exposed to an external electric field, so that the drawstring board is formed into a protruding electrode tip, when the equipment is operated, partial discharge is extremely easy to occur near the tips, long-term partial discharge can gradually erode insulating materials, serious faults such as insulation breakdown can be caused when serious faults occur, and economic losses are caused by maintenance or factory return of products. Therefore, to the above problem, a transformer core ribbon board structure with shielding function can be designed, all edges of the ribbon board are chamfered, the sharp right-angle edge is converted into a smooth transition arc, the electric field intensity around the ribbon board can be obviously reduced, and excessive concentration of field intensity is avoided. Disclosure of Invention To overcome the problem that partial discharge is easily caused by the protruding part of a transformer core strap plate. The technical scheme includes that the transformer iron core ribbon board structure with the shielding function comprises an iron core ribbon board, and further comprises a fixing plate fixedly arranged on the outer side of the iron core ribbon board, wherein iron core ribbon end fasteners penetrate through the iron core ribbon board, and the iron core ribbon board, the end parts of the fixing plate and edges are in chamfer structures. Preferably, all edges of the iron core ribbon board and the ribbon board formed after the iron core ribbon board and the fixing board are welded are chamfered, and sharp right-angle edges are converted into smooth transition circular arcs, so that the electric field intensity around the ribbon board can be remarkably reduced, and excessive concentration of field intensity is avoided. Preferably, the iron core strap plate is welded and fixed with the fixing plate, a groove is formed in the fixing plate, a mounting groove is reserved in the iron core strap plate, and the groove corresponds to the mounting groove in position. Preferably, the recess forms a stepped shield with the mounting slot. Preferably, the iron core draw tape end fastener penetrates through the groove and the mounting groove, and the tail end of the iron core draw tape end fastener is located in the groove. The invention has the beneficial effects that: 1. chamfering is carried out on all edges of the iron core ribbon board and the ribbon board formed after the iron core ribbon board and the fixing board are welded, the sharp right-angle edge is converted into a smooth transition arc, the electric field intensity around the ribbon board can be obviously reduced, and excessive concentration of field intensity is avoided; 2. a fixed plate with a specific size is welded on the outer side of the original thickness iron core ribbon plate, so that the thickness of the ribbon plate is increased, a step shielding body is formed by a groove of the fixed plate and a mounting groove of the iron core ribbon plate, an iron core ribbon end fastener is completely built in the ribbon plate, and the iron core ribbon end fastener is not exposed to an external electric field any more, so that the problem of partial discharge is avoided. Drawings Fig. 1 shows a front view of a transformer core strap plate structure with shielding function according to the present invention; FIG. 2 shows a side view of the transformer core strap plate structure with shielding function of the present invention; fig. 3 shows a top view of a structural annular blade of a transformer core tension band plate with shielding function according to the present invention. The reference numerals indicate that 1, an iron core drawstring board, 2, a fixing board, 3, an iron core drawstring end fastener, 4, a groove, 5 and a mounting groove. Detailed Description The invention is further described below with reference to the drawings and examples. Example 1: the application can solve the problem that partial discharge is easy to be caused because the edge of the structure of the drawplate is usually a right angle, and is based on the chamfering of the edge of the structure of the drawplate and the built-in way of th