Dry-type transformer insulation structure

By designing a multi-stage insulating structure in a dry transformer, including the insulation treatment of clamps and iron cores, clamps and box walls and connecting rods and iron cores, the problems of loose insulation of insulating gaskets and insufficient insulation of clamp boxes are solved. It realizes efficient insulation between the core, clamp and box, ensuring the safe and stable operation of the equipment.

CN222354911UActive Publication Date: 2025-01-14CHENGDU YIBIAN TRANSFORMER CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421044507.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-01-14
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

During long-term use of existing dry transformers, due to vibration and high temperature, the insulation gasket between the clamp and the iron core is loose, reducing insulation, and the insulation treatment between the clamp and the box wall is not considered, which affects the safety of the equipment. Stable operation.

Method used

A multi-stage insulating structure is designed, including a first insulating member between the clamp and the iron core, a second insulating member between the clamp and the box wall, and a third insulating member between the connecting rod and the iron core, Through materials such as insulating pads, insulating pads and cylindrical insulating parts, a multi-layer insulating structure is formed to ensure the insulation between the core, clamps and the box.

Benefits of technology

It effectively avoids loosening of the insulator, improves the insulation between the iron core and the clamp and the clamp and the box wall, ensures the safe and stable operation of the dry transformer, and enhances the insulation and stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222354911U_ABST
    Figure CN222354911U_ABST
Patent Text Reader

Abstract

The utility model discloses an insulation structure of a dry-type transformer, the dry-type transformer comprises an iron core and clamping pieces, the clamping pieces are arranged at the upper end and the lower end of the iron core, a first insulation piece is arranged on one side, close to the iron core, of each clamping piece, and a second insulation piece is clamped on one side, far away from the iron core, of each clamping piece; at least one group of connecting rods are arranged between the clamping pieces at the upper end and the lower end, the connecting rods are sleeved with third insulating pieces, the sides, close to the iron core, of the third insulating pieces make contact with the side face of the iron core, and insulating gaps are formed in the sides, away from the iron core, of the third insulating pieces; a first-stage insulation structure is formed between the iron core and the clamping piece through the first insulation piece, a second-stage insulation structure is formed between the clamping piece and the box wall through the second insulation piece, a third-stage insulation structure is formed between the connecting rod and the iron core through the third insulation piece, and therefore it is guaranteed that a multi-stage insulation structure is formed among the iron core, the clamping piece and the box wall. And the insulativity between the internal structures of the dry-type transformer is effectively ensured.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer insulation and relates to a dry-type transformer insulation structure. Background Art

[0002] Dry-type transformers have been widely used because of their advantages of environmental protection, fire prevention, explosion prevention, and easy placement. The interior of the dry-type transformer includes an iron core and a clamp for fixing the iron core. In order to ensure the safe and stable operation of the dry-type transformer, the iron core and the clamp need to be insulated. In the prior art, an insulating gasket is usually installed between the clamp and the iron core to achieve insulation between the iron core and the clamp. However, the vibration and high temperature generated by the dry-type transformer during long-term use will cause the insulating gasket between the clamp and the iron core to loosen and age, thereby reducing the insulation between the iron core and the clamp. At the same time, the existing dry-type transformers have not comprehensively considered the insulation treatment between the clamp and the box wall, which further has an adverse effect on the safe and stable operation of the dry-type transformer.

[0003] Therefore, in view of the above insulation problems existing in the existing dry-type transformers, the utility model discloses an insulation structure of a dry-type transformer. Utility Model Content

[0004] The utility model aims to provide an insulation structure of a dry-type transformer, which can form a multi-level insulation structure between an iron core, a clamp and a box wall, thereby effectively ensuring the insulation between the internal structures of the dry-type transformer.

[0005] The utility model is realized by the following technical solutions:

[0006] A dry-type transformer insulation structure, the dry-type transformer comprises an iron core and a clamp, the upper and lower ends of the iron core are both provided with clamps, the side of the clamp close to the iron core is provided with a first insulating member, and the side of the clamp away from the iron core is clamped with a second insulating member; at least one group of connecting rods is provided between the clamps at the upper and lower ends, the outside of the connecting rods is sleeved with a third insulating member, the side of the third insulating member close to the iron core is in contact with the side of the iron core, and the side of the third insulating member away from the iron core is provided with an insulating gap.

[0007] A first-level insulation structure is formed between the iron core and the clamp by the first insulating member, a second-level insulation structure is formed between the clamp and the box wall of the dry-type transformer by the second insulating member, and a third-level insulation structure is formed between the connecting rod and the iron core by the third insulating member, thereby ensuring the insulation between the iron core, the clamp and the box body.

[0008] In order to better realize the utility model, further, a mounting opening is provided on the side of the clamp away from the iron core, a mounting sleeve is provided in the mounting opening, a mounting hole is provided on the mounting sleeve, and the end of the connecting rod is inserted into the mounting hole.

[0009] In order to better realize the utility model, further, a through hole is provided on the installation sleeve, a threaded hole is provided on the side of the clamp, a locking screw is passed through the through hole, and the locking screw is matched and connected with the threaded hole.

[0010] In order to better realize the utility model, further, three groups of connecting rods are sequentially arranged between the clamps at both ends along the direction from left to right, and the outside of each group of connecting rods is covered with a third insulating member, which is a cylindrical structure.

[0011] In order to better realize the utility model, further, the third insulating member is any one of a rubber tube, a paper roll, and a resin tube.

[0012] In order to better implement the present utility model, further, the first insulating member includes a first insulating spacer, one side of the first insulating spacer is in contact with the side surface of the iron core, and the other side of the first insulating spacer is clamped with the clamp.

[0013] In order to better implement the utility model, further, a tooth-shaped insulating gap is provided on the side of the first insulating spacer close to the iron core.

[0014] In order to better implement the present invention, further, the second insulating member includes an insulating gasket, which is arranged across the clamps at both ends, and the side of the insulating gasket away from the iron core is in contact with the box wall of the dry-type transformer.

[0015] In order to better implement the utility model, further, a positioning channel steel is provided on the side of the clamp away from the iron core, and the end of the insulating gasket is correspondingly engaged with the groove on one side of the positioning channel steel.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] (1) The utility model effectively ensures the insulation between the clamp and the iron core by clamping the first insulating member on the side of the clamp close to the iron core and providing a tooth-shaped insulating gap on the side of the first insulating member close to the iron core. At the same time, the clamping structure between the clamp and the first insulating member prevents the first insulating member from loosening during long-term use.

[0018] (2) The utility model effectively ensures the insulation between the clamp and the box wall by arranging a second insulating member between the side of the clamp away from the iron core and the box wall, further providing protection for the safe and stable operation of the dry-type transformer;

[0019] (3) The utility model provides a connecting rod between the clamps at the upper and lower ends, and sleeves a third insulating member on the outside of the connecting rod. The connecting rod and the third insulating member provide support for the side of the iron core to ensure the stability of the iron core. At the same time, the insulation between the connecting rod and the iron core is ensured by the third insulating member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the insulation structure of a dry-type transformer;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 for Figure 1 BB section view;

[0023] Figure 4 for Figure 1 A partial enlarged view of point C;

[0024] Figure 5 Schematic diagram of the installation of the connecting rod.

[0025] Among them: 1-iron core; 2-clamp; 3-connecting rod; 4-installation opening; 5-installation sleeve; 001-first insulating member; 002-second insulating member; 003-third insulating member; 001A-first insulating spacer; 001B-toothed insulating gap; 002A-insulating spacer; 002B-positioning channel steel. DETAILED DESCRIPTION

[0026] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] Embodiment 1:

[0031] A dry-type transformer insulation structure of this embodiment, such as Figure 1-Figure 3 As shown, the dry-type transformer includes an iron core 1 and a clamp 2, wherein the upper and lower ends of the iron core 1 are provided with clamps 2, a first insulating member 001 is provided on the side of the clamp 2 close to the iron core 1, and a second insulating member 002 is clamped on the side of the clamp 2 away from the iron core 1; at least one group of connecting rods 3 is provided between the upper and lower ends of the clamps 2, a third insulating member 003 is sleeved on the outside of the connecting rods 3, a side of the third insulating member 003 close to the iron core 1 is in contact with the side of the iron core 1, and an insulating gap is provided on the side of the third insulating member 003 away from the iron core 1.

[0032] The clamps 2 at the upper and lower ends are used to clamp and fix the upper and lower ends of the iron core 1 respectively, and the clamp 2 at the lower end is connected to the base to fix the iron core 1. A first insulating member 001 is provided on the side of the clamp 2 close to the iron core 1, and the first insulating member 001 contacts one side of the iron core 1 to form a first-level insulating structure between the clamp 2 and the iron core 1, thereby ensuring the insulation between the clamp 2 and the iron core 1.

[0033] At the same time, in order to ensure the stability of the clamp 2, at least one set of connecting rods 3 is arranged between the two sets of clamps 2 at the upper and lower ends, and the connecting rods 3 can be arranged vertically or tilted. The outside of the connecting rod 3 is covered with a third insulating member 003, one side of the third insulating member 003 contacts the side of the iron core 1, which is used to assist in stabilizing the iron core 1. At the same time, the third insulating member 003 forms a third-level insulating structure between the connecting rod 3 and the iron core 1 to ensure the insulation between the connecting rod 3 and the iron core 1.

[0034] A second insulating member 002 is provided on the side of the clamp 2 away from the iron core 1, that is, on the side of the clamp 2 close to the box wall of the dry-type transformer, one side of the second insulating member 002 is in contact with the box wall, and an insulating gap is provided between the other side of the second insulating member 002 and the iron core 1. By providing the second insulating member 002, a second-level insulating structure is formed between the clamp 2 and the box wall, thereby ensuring the insulation between the clamp 2 and the box wall.

[0035] Embodiment 2:

[0036] A dry-type transformer insulation structure is improved on the basis of embodiment 1, such as Figure 4 and Figure 5 As shown, a mounting opening 4 is provided on the side of the clamp 2 away from the core 1, a mounting sleeve 5 is provided in the mounting opening 4, a mounting hole is provided on the mounting sleeve 5, and the end of the connecting rod 3 is inserted into the mounting hole.

[0037] The mounting opening 4 is arranged in a vertical direction, and the mounting sleeve 5 is directly inserted into the interior of the mounting opening 4. The mounting sleeve 5 is provided with a mounting hole, and the end of the connecting rod 3 is inserted into the interior of the mounting hole. The mounting sleeve 5 is made of insulating material, which further ensures the insulation between the connecting rod 3 and the clamp 2.

[0038] Furthermore, a through hole is provided on the installation sleeve 5, and a threaded hole is provided on the side of the clamp 2. A locking screw is passed through the through hole, and the locking screw is matched and connected with the threaded hole.

[0039] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0040] Embodiment 3:

[0041] A dry-type transformer insulation structure, improved on the basis of embodiment 1 or 2, such as Figure 2 and Figure 3 As shown, three groups of connecting rods 3 are sequentially arranged between the clamps 2 at both ends along the direction from left to right, and the outside of each group of connecting rods 3 is covered with a third insulating member 003, and the third insulating member 003 is a cylindrical structure.

[0042] By setting multiple groups of connecting rods 3, the connection stability between the clamps 2 at the upper and lower ends can be ensured. At the same time, in order to ensure the insulation between the connecting rods 3 and the iron core 1, a third insulating member 003 is mounted on the outside of each group of connecting rods 3, and the spacing between adjacent connecting rods 3 is greater than or equal to 30 cm.

[0043] Furthermore, the third insulating member 003 is any one of a rubber tube, a paper roll, and a resin tube.

[0044] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0045] Embodiment 4:

[0046] A dry-type transformer insulation structure, improved on the basis of any one of embodiments 1-3, such as Figure 4 and Figure 5 As shown, the first insulating member 001 includes a first insulating spacer 001A, one side of the first insulating spacer 001A contacts the side surface of the iron core 1 , and the other side of the first insulating spacer 001A is clamped with the clamp 2 .

[0047] A snap-in flange is provided on the side of the clamp 2 close to the iron core 1, and a snap-in groove corresponding to the snap-in flange is provided on the side of the first insulating spacer 001A close to the clamp 2. Through the corresponding snap-in connection between the snap-in flange and the snap-in groove, the first insulating spacer 001A can be quickly positioned and installed on one side of the clamp 2, thereby improving the installation convenience of the first insulating spacer 001A.

[0048] Furthermore, a tooth-shaped insulating gap 001B is provided on the side of the first insulating spacer 001A close to the iron core 1. By providing the tooth-shaped insulating gap 001B, the conductive breakdown distance between the first insulating spacer 001A and the iron core 1 is increased, and the insulation between the first insulating spacer 001A and the iron core 1 is further improved.

[0049] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0050] Embodiment 5:

[0051] A dry-type transformer insulation structure, improved on the basis of any one of embodiments 1-4, such as Figure 4 and Figure 5 As shown, the second insulating member 002 includes an insulating gasket 002A, which spans between the clamps 2 at both ends, and the side of the insulating gasket 002A away from the iron core 1 is in contact with the box wall of the dry-type transformer.

[0052] The insulating gasket 002A is in the shape of a long strip, and at least one group of insulating gaskets 002A is sequentially arranged between the clamps 2 at the upper and lower ends along the direction from left to right. Preferably, three groups of insulating gaskets 002A are sequentially arranged between the clamps 2 at the upper and lower ends along the direction from left to right. The side of the insulating gasket 002A away from the iron core 1 contacts the box wall of the dry-type transformer, and is used to form an insulating structure between the clamp 2 and the box wall, thereby improving the insulation between the clamp 2 and the box wall.

[0053] Furthermore, a positioning channel steel 002B is provided on the side of the clamp 2 away from the iron core 1, and the end of the insulating gasket 002A is correspondingly engaged with the groove on one side of the positioning channel steel 002B. The end of the insulating gasket 002A is directly mounted in the groove on one side of the positioning channel steel 002B, so as to realize the convenient installation of the insulating gasket 002A. At the same time, in order to ensure the stability of the internal structure of the dry-type transformer, an insulating shock-absorbing block is provided between the insulating gasket 002A and the bottom surface of the groove of the positioning channel steel 002B.

[0054] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A dry-type transformer insulation structure, the dry-type transformer comprising an iron core (1) and a clamp (2), characterized in that: The core (1) is provided with clamps (2) at both upper and lower ends, a first insulating member (001) being provided on a side of the clamp (2) close to the core (1), and a second insulating member (002) being clamped on a side of the clamp (2) away from the core (1); at least one group of connecting rods (3) is provided between the clamps (2) at the upper and lower ends, a third insulating member (003) being sleeved on the outside of the connecting rods (3), a side of the third insulating member (003) close to the core (1) being in contact with a side surface of the core (1), and an insulating gap being provided on a side of the third insulating member (003) away from the core (1).

2. A dry-type transformer insulation structure according to claim 1, characterized in that: A mounting opening (4) is provided on a side of the clamp (2) away from the iron core (1), a mounting sleeve (5) is provided in the mounting opening (4), a mounting hole is provided on the mounting sleeve (5), and an end of the connecting rod (3) is inserted into the mounting hole.

3. A dry-type transformer insulation structure according to claim 2, characterized in that: The mounting sleeve (5) is provided with a through hole, the side surface of the clamp (2) is provided with a threaded hole, a locking screw is passed through the through hole, and the locking screw is matched and connected with the threaded hole.

4. The dry-type transformer insulation structure according to claim 1, characterized in that: Three groups of connecting rods (3) are arranged in sequence from left to right between the clamps (2) at both ends, and each group of connecting rods (3) is sheathed with a third insulating member (003) on the outside, wherein the third insulating member (003) is a cylindrical structure.

5. The dry-type transformer insulation structure according to claim 1, characterized in that: The third insulating member (003) is any one of a rubber tube, a paper roll, and a resin tube.

6. A dry-type transformer insulation structure according to any one of claims 1 to 5, characterized in that: The first insulating member (001) comprises a first insulating spacer (001A), one side of the first insulating spacer (001A) contacts the side surface of the iron core (1), and the other side of the first insulating spacer (001A) is clamped with the clamp (2).

7. The dry-type transformer insulation structure according to claim 6, characterized in that: A tooth-shaped insulating gap (001B) is provided on a side of the first insulating spacer (001A) close to the iron core (1).

8. A dry-type transformer insulation structure according to any one of claims 1 to 5, characterized in that: The second insulating member (002) comprises an insulating gasket (002A), the insulating gasket (002A) spanning between the clamps (2) arranged at both ends, and the side of the insulating gasket (002A) away from the iron core (1) contacts the box wall of the dry-type transformer.

9. The dry-type transformer insulation structure according to claim 8, characterized in that: A positioning channel steel (002B) is provided on the side of the clamp (2) away from the iron core (1), and the end of the insulating gasket (002A) is correspondingly engaged with a groove on one side of the positioning channel steel (002B).