An epoxy cast transformer with mortise and tenon buckle section insulation support block

Abstract

This invention provides an epoxy resin cast transformer with inter-segment insulation support blocks featuring mortise and tenon joints. The device consists of stackable insulation support blocks, each with matching tenons and mortises. Horizontal displacement is restricted during stacking via the mortise and tenon structure. Through holes are formed in the support block body for resin infiltration and curing. This invention utilizes a universal mortise and tenon inter-segment insulation support block device, which can handle different inter-segment structures. It is simple to operate, significantly reduces labor costs, effectively prevents displacement between winding segments, ensures insulation gaps, and improves the insulation performance and mechanical strength of the windings.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary processing technology in the manufacturing of transformer windings, and more specifically, to an epoxy cast transformer with an interlocking insulating support block. Background Technology

[0002] With the rapid development of the economy and industry, people's safety awareness is constantly increasing, and the requirements for power safety are constantly improving. The demand for dry-type transformer equipment is growing day by day. How to improve efficiency and how to beautify the appearance are increasingly valued. Previously, the treatment of inter-section insulation adopted the processing method of manually binding mesh cloth to make pads or casting resin boards and then cutting them into shapes. Both of these methods are not only harmful to the human body, but also pollute the environment. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides an epoxy cast transformer with an interlocking insulating support block with tenon and mortise joints.

[0004] This utility model is achieved through the following technical solution: an epoxy resin cast transformer with interlocking insulating support blocks, comprising:

[0005] The iron core is vertically positioned at the center of the epoxy resin cast transformer.

[0006] The high-voltage winding and the low-voltage winding are coaxially sleeved on the outside of the iron core;

[0007] An epoxy resin casting body covers a high-voltage winding and a low-voltage winding, including end-encapsulation insulation located at the upper and lower ends of the high-voltage winding and the low-voltage winding, as well as inner-encapsulation insulation and outer-encapsulation insulation on both sides.

[0008] The upper and lower clamps respectively hold the upper and lower surfaces of the iron core via through-bolts;

[0009] The base is bolted to the lower clamp.

[0010] The copper busbar is welded to the low-voltage winding lead at one end and extends to the outside of the epoxy resin casting at the other end.

[0011] The fan is installed on the side wall of the base, with its air outlet facing the heat dissipation channel of the epoxy resin casting.

[0012] Among them, an insulating support block assembly is provided between adjacent segments of the high-voltage winding and between adjacent segments of the low-voltage winding; the insulating support block assembly is composed of two or more insulating support block units stacked together, which surround the end face of the winding; the bottom surface of the insulating support block unit is provided with a protrusion, and the top surface is provided with a groove that matches the protrusion; adjacent insulating support block units are joined by the protrusions fitting into the grooves to form a tenon and mortise; the interior of the insulating support block unit is provided with resin permeation holes that penetrate the axial direction.

[0013] As a preferred option, the resin permeation pores are a porous honeycomb array with a pore size of 1-3 mm.

[0014] Furthermore, the density of the resin-permeable pores is 10-15 pores / cm².

[0015] As a preferred option, the insulating support block is molded from glass fiber reinforced epoxy resin with a temperature resistance rating of ≥180℃.

[0016] This utility model, by adopting the above technical solutions, has the following beneficial effects compared with the prior art: the use of a universal tenon and mortise inter-segment insulation support block device can cope with different inter-segment structures, is simple to operate, greatly saves labor costs, effectively prevents displacement between winding segments, ensures insulation gaps, and improves the insulation performance and mechanical strength of the winding.

[0017] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0021] Figure 3 This is a top view of the structure of a single insulating support block.

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the BB cross section.

[0023] in, Figures 1 to 4 The correspondence between the reference numerals and components in the attached drawings is as follows:

[0024] 1. Iron core; 2. High voltage winding; 3. Low voltage winding; 4. End-encapsulated insulation; 5. Inner-encapsulated insulation; 6. Outer-encapsulated insulation; 7. Upper clamp; 8. Lower clamp; 9. Through-core screw; 10. Base; 11. Copper busbar; 12. Fan; 13. Insulation support block assembly; 14. Insulation support block unit; 15. Protrusion; 16. Groove; 17. Resin penetration hole; 101. Insulation support block unit. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] The following is combined Figures 1 to 3 The following is a detailed description of an epoxy cast transformer with interlocking insulating support blocks in accordance with embodiments of the present invention.

[0028] like Figure 1 , Figure 2 As shown, this utility model proposes the following technical solution: an epoxy resin cast transformer with mortise and tenon joint inter-segment insulation support blocks, comprising:

[0029] Iron core 1 is vertically installed at the center of the epoxy resin cast transformer;

[0030] The high-voltage winding 2 and the low-voltage winding 3 are coaxially sleeved on the outside of the iron core 1;

[0031] An epoxy resin casting body covers a high-voltage winding 2 and a low-voltage winding 3, and includes end-encapsulation insulation 4 located at the upper and lower ends of the high-voltage winding 2 and the low-voltage winding 3, as well as inner-encapsulation insulation 5 and outer-encapsulation insulation 6 on both sides.

[0032] The upper clamp 7 and the lower clamp 8 respectively clamp the upper and lower surfaces of the iron core 1 through the through screw 9;

[0033] The base 10 is bolted to the lower clamp 8;

[0034] Copper busbar 11, one end is welded to the lead wire of low voltage winding 3, and the other end extends to the outside of epoxy resin casting body;

[0035] Fan 12 is installed on the side wall of base 10, with its air outlet facing the heat dissipation channel of epoxy resin casting.

[0036] Insulating support block assemblies 13 are provided between adjacent segments of the high-voltage winding 2 and between adjacent segments of the low-voltage winding 3. Each insulating support block assembly 13 is composed of two or more individually stacked insulating support blocks 14 that encircle the winding end faces. Each individually stacked insulating support block 14 is annular, with a protrusion 15 on its bottom surface and a groove 16 on its top surface that matches the protrusion 15. Adjacent insulating support blocks 14 are joined by the protrusion 15 into the groove 16, forming a tenon-and-mortise joint that restricts horizontal X / Y bidirectional displacement. Each individually stacked insulating support block 14 has axially penetrating resin permeation holes 17 inside. The resin permeation holes 17 are a porous honeycomb array with a pore size of 1-3 mm and a density of 10-15 pores / cm². The individually stacked insulating support blocks 14 are molded from glass fiber reinforced epoxy resin with a temperature resistance rating ≥180℃.

[0037] The insulating support blocks can be stacked in pairs or more according to the winding requirements. Each insulating support block has protrusions and grooves to restrict lateral movement during stacking. The insulating support blocks also have holes to facilitate resin impregnation during casting. This new structure changes the previous production method, is safe and environmentally friendly, and is easy to operate. It effectively prevents displacement between winding sections, ensures insulation gaps, and improves the insulation performance of the winding.

[0038] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An epoxy resin cast transformer with interlocking insulating support blocks, comprising: The iron core (1) is vertically installed at the center of the epoxy cast transformer; The high-voltage winding (2) and the low-voltage winding (3) are coaxially sleeved outside the iron core (1); An epoxy resin casting body covers a high-voltage winding (2) and a low-voltage winding (3), which includes end-encapsulation insulation (4) located at the upper and lower ends of the high-voltage winding (2) and the low-voltage winding (3), as well as inner-encapsulation insulation (5) and outer-encapsulation insulation (6) on both sides. The upper clamp (7) and the lower clamp (8) respectively clamp the upper and lower surfaces of the iron core (1) through the through screw (9); The base (10) is bolted to the lower clamp (8); The copper busbar (11) is welded at one end to the lead wire of the low voltage winding (3) and extends to the outside of the epoxy resin casting body at the other end. A fan (12) is installed on the side wall of the base (10), and its air outlet is aligned with the heat dissipation channel of the epoxy resin casting. An insulating support block assembly (13) is provided between adjacent segments of the high voltage winding (2) and between adjacent segments of the low voltage winding (3). The insulating support block assembly (13) is composed of two or more insulating support block units (14) stacked around the end face of the winding. The bottom surface of the insulating support block unit (14) is provided with a protrusion (15), and the top surface is provided with a groove (16) that matches the protrusion (15). Adjacent insulating support block units (14) are joined by the protrusion (15) embedded in the groove (16) to form a tenon and tenon joint. The interior of the insulating support block unit (14) is provided with resin penetration holes (17) that penetrate through the axial direction.

2. An epoxy-cast transformer with interlocking insulating support blocks according to claim 1, characterized in that... The resin permeation pores (17) are a porous honeycomb array with a pore size of 1-3 mm.

3. An epoxy-cast transformer with interlocking insulating support blocks according to claim 2, characterized in that... The density of the resin permeation pores (17) is 10-15 pores / cm².

4. An epoxy resin cast transformer with interlocking insulating support blocks according to claim 1, characterized in that... The insulating support block unit (14) is molded from glass fiber reinforced epoxy resin and has a temperature resistance rating of ≥180℃.

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