Combined splicing air passage rod for dry-type transformer coil

Abstract

The utility model discloses a combined splicing air passage rod for a dry type transformer coil, and relates to the technical field of transformers, a first air passage rod is composed of first rod strips, a first sealing rubber strip and a second sealing rubber strip, the first sealing rubber strip and the second sealing rubber strip are arranged between the adjacent first rod strips, one side of the second air passage rod is provided with a butt joint flange, and the butt joint flange is connected with the butt joint flange. A butt joint groove is formed in the other side of the second air channel rod, and the third air channel rod is composed of a third rod A and a third rod B which are combined in a staggered mode. Based on the combination of the first air passage rod, the second air passage rod and the third air passage rod in the air passage rod structure, the integrated air passage rod structure can be formed in a mutual splicing and assembling mode, a sealing material does not need to be filled in a glue rod gap, the flexible splicing and assembling characteristic is achieved, and the air passage rod structure is convenient to assemble and disassemble. The forming device can flexibly adapt to the machining and forming work of linear and arc-shaped air passage holes of the transformer coil, the traditional mode that single holes of the transformer coil are densely distributed is replaced, and the forming size of the air passage is flexible and adjustable.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer field especially relates to a combination splicing air channel stick for dry -type transformer coil. BACKGROUND

[0002] The dry -type transformer coil of large capacity needs to add air channel to carry out heat dissipation, at present, the air channel often adopts air channel stick to assist to manufacture in the transformer manufacturing process, such as the dry -type transformer coil of resin casting with air channel stick (disclosed announcement number CN210628075U) shown in Chinese patent network, the air channel stick length is consistent with the winding inner mould, the air channel stick is enclosed in the mould with the winding when moulding, pours, after the coil cooling, utilizes the characteristics that the air channel stick material thermal expansion coefficient is greater than resin, pulls out the air channel stick, forms the air channel.

[0003] However, the transformer coil air channel stick adopted in the above-mentioned published patent and the existing market still has some deficiencies: the existing air channel stick is mostly independent stick structure, and the pouring and demolding forming is mostly single-hole dense structure. Since the single hole is usually relatively narrow, and the air channel stick often cannot turn the corner when passing through the elliptical part of the coil, even if the air channel stick is processed into a single wide strip with an arc structure, the demolding in the later stage is difficult, which can easily cause the coil to crack. Therefore, the technical personnel in the field provide a combination splicing air channel stick for dry-type transformer coil to solve the problems raised in the above background technology. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a combination splicing air channel stick for dry-type transformer coil, which solves the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a combination splicing air channel stick for dry-type transformer coil, comprising a first coil and a second coil; an air channel end of the first coil and the second coil is inserted with an air channel stick structure; the air channel stick structure comprises a first air channel stick, the first air channel stick is composed of a first stick strip close to each other and a first sealing rubber strip and a second sealing rubber strip arranged between adjacent first stick strips; the two sides of the first sealing rubber strip are provided with parallel waist surfaces in the form of concave inward, and the two sides of the second sealing rubber strip are provided with wedge-shaped waist surfaces in the form of concave inward.

[0006] As a further technical scheme of the utility model: the edge angle of the first stick strip is provided with a chamfer, and the chamfer is a rounded chamfer structure.

[0007] As a further technical scheme of the utility model: the air channel stick structure further comprises a second air channel stick close to each other, one side of the second air channel stick is provided with a butt flange, and the other side of the second air channel stick is provided with a butt groove.

[0008] As a further technical solution of this utility model: both the mating flange and the mating groove are arc-shaped structures with the same diameter.

[0009] As a further technical solution of this utility model: the airway bar structure includes a third airway bar, which is composed of a third bar A and a third bar B arranged in an alternating manner.

[0010] As a further technical solution of this utility model: the third bar A is provided with buckle flanges on both sides, and the third bar B is provided with buckle grooves on both sides that are adapted to the buckle flanges.

[0011] As a further technical solution of this utility model: the buckle flange and the buckle groove are both arc-shaped structures with the same diameter.

[0012] This utility model provides a combined splicing air duct bar for dry transformer coils, which has the following advantages compared with the prior art:

[0013] This design for a transformer coil processing air duct bar, based on the combination of a first, second, and third air duct bar in its structure, can be assembled into a single air duct bar structure through splicing. It can connect adjacent air duct bars using sealing strips or overlap them using a groove structure, widening the air duct bar and thus widening the air duct of the transformer coil. This increases the airflow and reduces the amount of epoxy resin used. It features flexible horizontal and arc-shaped splicing assembly characteristics, adapting flexibly to the processing and forming of straight and arc-shaped air duct holes in transformer coils. Furthermore, the air duct holes processed by this integrated splicing assembly replace the traditional method of densely packed single holes in transformer coils. The size of the air duct is flexibly adjustable, and the air duct formation is smoother and more uniform, facilitating the subsequent sequential removal of the air duct bar from the coil with less damage. It effectively increases the width of the air duct and the heat dissipation area, reduces the amount of epoxy resin used, and thus effectively reduces the temperature rise of dry-type transformers, achieving good economic benefits. Attached Figure Description

[0014] Figure 1 A schematic diagram of the first assembly and processing of a combined splicing air passage bar for a dry transformer coil;

[0015] Figure 2 This is a schematic diagram of the second assembly process for a combined splicing air passage bar used in a dry transformer coil.

[0016] Figure 3 A schematic diagram of the structure of the first air duct bar in a combined splicing air duct bar for a dry transformer coil;

[0017] Figure 4An exploded view of the first air duct in a composite splicing air duct for a dry-type transformer coil;

[0018] Figure 5 A plan view of the first air duct bar in a combined splicing air duct bar for a dry-type transformer coil;

[0019] Figure 6 A schematic diagram of the structure of the second air duct bar in a combined splicing air duct bar for a dry transformer coil;

[0020] Figure 7 An exploded view of the second air duct rod in a composite splicing air duct rod for a dry-type transformer coil;

[0021] Figure 8 A schematic diagram of the structure of the third air duct bar in a combined splicing air duct bar for a dry transformer coil;

[0022] Figure 9 This is an exploded view of the third air duct in a composite splicing air duct for a dry-type transformer coil.

[0023] In the diagram: 1. First coil; 2. Second coil; 3. First air passage rod; 31. First rod strip; 311. Chamfer; 32. First sealing strip; 321. Parallel waist surface; 33. Second sealing strip; 331. Wedge-shaped waist surface; 4. Second air passage rod; 41. Butt flange; 42. Butt groove; 5. Third air passage rod; 51. Third rod strip A; 511. Snap-on flange; 52. Third rod strip B; 521. Snap-on groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0025] Please see Figures 1-5This utility model provides a technical solution for a combined splicing air duct bar for dry-type transformer coils: A combined splicing air duct bar for dry-type transformer coils includes a first coil 1 and a second coil 2. An air duct bar structure is inserted into the air duct ends of the first coil 1 and the second coil 2. The air duct bar structure includes a first air duct bar 3, which is composed of first bar strips 31 that are sequentially attached to each other, and a first sealing strip 32 and a second sealing strip 33 disposed between adjacent first bar strips 31. The first sealing strip 32 has parallel waist surfaces 321 on both sides in an inwardly concave form, and the second sealing strip 33 has wedge-shaped waist surfaces 331 on both sides in an inwardly concave form. Based on the combination of the first bar strip 31 and the first sealing strip 32, the parallel waist surfaces 321 on the first sealing strip 32 enable the first bar strip 31 and the first sealing strip 32 to... It can maintain a tight assembly in a straight state to serve as a forming tool for the straight air passage of the transformer coil. At the same time, based on the combination of the first bar 31 and the second sealing strip 33, the wedge-shaped waist surface 331 on the second sealing strip 33 can maintain a tight assembly in an arc state to serve as a forming tool for the arc air passage of the transformer coil. The flexible combination of the first bar 31 and the two sets of sealing strips can form air passages of different sizes and straight / arc shapes, which can more flexibly adapt to the forming work of the transformer coil air passage. Moreover, it is integrally assembled. Since the sealing strip has good elasticity and non-stick properties, it can be easily pulled out or cut off after the epoxy resin of the dry transformer coil is poured. The subsequent removal of the air passage bar is more convenient, and the damage to the transformer coil is less.

[0026] It should be noted that the first rod 31 has a chamfer 311 at its corner. The chamfer 311 is a rounded corner structure. By setting the corner of the first rod 31 to a rounded corner, it can not only eliminate the installation gap caused by the sharp corner, but also has the flip adjustment characteristic, so that the first rod 31 can flip and swing along the two sets of rubber strips to adapt to the seamless connection assembly work of the airway rod changing from a straight line to an arc. Example

[0027] Please see Figures 6-7This embodiment further explains Example 1. The air passage rod structure also includes a second air passage rod 4 that is attached to each other in sequence. One side of the second air passage rod 4 is provided with a mating flange 41, and the other side of the second air passage rod 4 is provided with a mating groove 42. Both the mating flange 41 and the mating groove 42 are arc-shaped structures with the same diameter. By setting the air passage rod structure as a form of second air passage rod 4 that is spliced ​​and assembled with each other, and having arc-shaped mating flanges 41 and mating grooves 42 on both sides of the second air passage rod 4 in sequence, when the air passage rod structures of the second air passage rod 4 are assembled with each other, the mating buckles of the mating flanges 41 and the mating grooves 42 are used to ensure that the adjacent second air passage rods 4 not only have the characteristics of mutual sealing assembly, but also have the characteristics of swinging and turning. They can be flexibly spliced ​​and assembled into a straight / arc air passage rod structure, which is more flexibly adapted to the forming work of transformer coil air passage. Example

[0028] Please see Figures 8-9 This embodiment further explains other embodiments, and the airway rod structure includes a third airway rod 5. The third airway rod 5 is composed of interleaved third rod strips A51 and B52. The third rod strip A51 has snap-fit ​​flanges 511 on both sides, and the third rod strip B52 has snap-fit ​​grooves 521 on both sides that are adapted to the snap-fit ​​flanges 511. Both the snap-fit ​​flanges 511 and the snap-fit ​​grooves 521 are arc-shaped structures with the same diameter. By setting the third airway rod 5 as an interleaved combination of third rod strips A51 and B52, its interleaved combination utilizes… The two sets of bars are provided with arc-shaped snap-fit ​​flanges 511 and snap-fit ​​grooves 521 on both sides. When the two sets of bars are assembled in an interlaced manner, they have the characteristics of tight fit and can flexibly form air passage bar structures of different widths and sizes. This allows the transformer coil to form air passage structures of different widths and sizes during casting. On the other hand, they also have the characteristics of arbitrary swing and turning, which can be adapted to the straight / arc lines of the transformer air passages. This not only improves the ease of assembly, but also has good integrated sealing performance, which is suitable for the casting of air passages with different paths in the transformer coil.

[0029] The three sets of airway rod structures, consisting of the first airway rod 3, the second airway rod 4, and the third airway rod 5, can be selected and used specifically according to the airway requirements of the first coil 1 and the second coil 2 to adapt to airways with different width specifications. In addition to the first coil 1 and the second coil 2, the combination of the three sets of airway rod structures can also adapt to the forming of coil airways of other different specifications and styles, improving the flexibility and adaptability of assembly, and ensuring the airway width is adjustable, while also ensuring the integrity of the assembly seal. No additional sealing medium is needed to fill the gaps, which facilitates the subsequent disassembly and assembly of the airway rod structure.

[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A combined splicing air duct bar for dry-type transformer coils, characterized in that, Including the first coil (1) and the second coil (2); An airway rod structure is inserted into the airway end of the first coil (1) and the second coil (2); The airway bar structure includes a first airway bar (3), which is composed of a first bar strip (31) that is attached to each other in sequence, and a first sealing strip (32) and a second sealing strip (33) disposed between adjacent first bar strips (31); The first sealing strip (32) has parallel waist surfaces (321) on both sides in an inward concave form, and the second sealing strip (33) has wedge-shaped waist surfaces (331) on both sides in an inward concave form.

2. The combined splicing air duct bar for dry-type transformer coils according to claim 1, characterized in that, The first bar (31) has chamfers (311) at its corners, and the chamfers (311) are rounded corners.

3. The combined splicing air duct bar for dry-type transformer coils according to claim 1, characterized in that, The airway bar structure also includes a second airway bar (4) that is attached to each other in sequence. One side of the second airway bar (4) is provided with a mating flange (41), and the other side of the second airway bar (4) is provided with a mating groove (42).

4. The combined splicing air duct bar for dry-type transformer coils according to claim 3, characterized in that, Both the mating flange (41) and the mating groove (42) are arc-shaped structures with the same diameter.

5. A combined splicing air duct bar for dry-type transformer coils according to claim 1, characterized in that, The airway bar structure further includes a third airway bar (5), which is composed of interleaved third bar strips A (51) and B (52).

6. A combined splicing air duct bar for dry-type transformer coils according to claim 5, characterized in that, The third bar A (51) has a buckling flange (511) on both sides, and the third bar B (52) has a buckling groove (521) on both sides that is adapted to the buckling flange (511).

7. A combined splicing air duct bar for dry-type transformer coils according to claim 6, characterized in that, Both the buckle flange (511) and the buckle groove (521) are arc-shaped structures with the same diameter.

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