Three-dimensional wound core block

Abstract

The utility model discloses a three-dimensional wound core block which comprises a block body, edge grooves are formed in the two long edge sides of the block body, the core block further comprises edge strips installed in the edge grooves, the edge grooves are matched with the edge strips in shape, each edge groove is in an isosceles trapezoid shape, and the length of the outer side bottom edge of each edge groove is larger than that of the inner side bottom edge of each edge groove. Limiting tables are formed between the ends of the edge grooves and the short edges of the corresponding sides of the block body. According to the utility model, the edgings and the edge grooves are changed into isosceles trapezoid structures, the shape of the limiting table is similar to a right trapezoid, and the width of the root part is greater than that of the top part, so that the strength of the limiting table is improved, the conditions of collapse and distortion are reduced, and meanwhile, the resistance when the edgings are taken off is also reduced.

Description

Technical Field

[0001] The utility model relates to a rolled iron core block. Background Art

[0002] The annealing of three-dimensional wound core requires the use of core blocks to support the silicon steel sheets and maintain the shape of the core.

[0003] Traditional core block structure such as Figure 1 As shown, a groove 3 is provided at the outer edge of the core block 1, and the groove 3 is used to pass the strapping tape 2, so as to facilitate bundling the silicon steel sheets during annealing. After the annealing is completed, the strapping tape 2 needs to be cut open and the core block is taken out. However, the core block is sandwiched between the silicon steel sheets, and it is difficult to take it out.

[0004] To solve the above problems, the prior art proposes Figure 2 The core block structure shown in the figure has rectangular side grooves on the two long sides of the block 1, and the side strips 4 are installed in the side grooves. After annealing, the side strips 4 are removed first, at which time the clamping force of the silicon steel sheet on the core block is weakened, and then the entire block 1 is removed. However, after the side strips 4 are added, the limit platform 7 formed between the side grooves and the two ends of the block 1 is narrow and has poor strength. After repeated annealing, it is easy to collapse and twist, affecting the size of the core, resulting in the restriction or inability to carry out subsequent processes, and also affecting the normal installation of the side strips 4. Utility Model Content

[0005] The utility model provides a three-dimensional wound iron core block, the purpose of which is to solve the problem that limiting platforms on both sides of a side slot are prone to collapse and distortion.

[0006] The technical solution of this utility model is as follows:

[0007] A three-dimensional wound core block, comprising a block body, two long sides of the block body are provided with side grooves, the core block further comprises side strips installed in the side grooves, the side grooves are consistent with the side strips in shape, the side grooves are in the shape of an isosceles trapezoid, and the length of the outer bottom side is greater than the inner bottom side;

[0008] A limiting platform is formed between the end of the side groove and the corresponding short side of the block.

[0009] As a further improvement of the three-dimensional wound core block: assuming that the length of the block, i.e. the distance between the two short sides, is L, and the distance between the outer bottom edge of the side groove and the corresponding short side of the block, i.e. the length of the limit platform is L1, then the range of L1 / L is 0.15~0.25.

[0010] As a further improvement of the three-dimensional wound core block: a belt threading hole is provided in the limiting platform.

[0011] As a further improvement of the three-dimensional wound core block: the distance L2 between the center of the through hole and the corresponding short side of the block is 15-45 mm.

[0012] As a further improvement of the three-dimensional wound core block: the distance L4 between the center of the belt hole and the corresponding side long side is 23-33 mm.

[0013] As a further improvement of the three-dimensional wound core block, the width of the side strip, that is, the depth L3 of the side groove is 20-30 mm.

[0014] As a further improvement of the three-dimensional wound core block: a groove is provided at the inner bottom edge of the side groove.

[0015] As a further improvement of the three-dimensional wound core block: the obtuse angle of the inner side of the side strip is 120° to 150°.

[0016] As a further improvement of the three-dimensional wound core block, the obtuse angle of the inner side of the side strip is 135°.

[0017] Compared with the prior art, the utility model has the following positive effects:

[0018] 1. Change the side groove to an isosceles trapezoidal structure, so that the shape of the limit platform is close to a right-angled trapezoid, and the root width is greater than the top width, thereby improving the strength of the limit platform, reducing the occurrence of collapse and distortion, ensuring that the shape and size of the iron core meet the requirements, and reducing the resistance when removing the side strips.

[0019] 2. The ratio between the length of the limit platform and the length of the block can take into account both the mechanical strength of the limit platform and the convenience of removing the edge strips.

[0020] 3. The strapping hole is set in the middle of the limit platform, closer to the four right-angle sides of the four blocks, which has a better bundling effect. At the same time, the distance between the strapping hole and the edge is limited to reduce the weakening of the limit platform strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure in which a conventional integrated core block and a silicon steel sheet are installed together;

[0022] Figure 2 It is a schematic diagram of the structure in which a core block with side strips and a silicon steel sheet are installed together in the prior art;

[0023] Figure 3 This is a schematic diagram of the structure of the core block and silicon steel sheet installed together in the utility model;

[0024] Figure 4 It is a structural schematic diagram of the block in the utility model;

[0025] Figure 5It is a structural schematic diagram of the edge strip in the utility model. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0027] like Figures 3 to 5 A three-dimensional wound core block includes a block 1, two long sides of the block 1 are provided with side grooves 6, and the core block also includes side strips 4 installed in the side grooves 6. A stopper 7 is formed between the end of the side groove 6 and the corresponding short side of the block 1.

[0028] The side groove 6 is in the shape of an isosceles trapezoid, and the length of the outer bottom side is greater than the inner bottom side. The side groove 6 is consistent with the shape of the side strip 4. The obtuse angle of the inner side of the side strip 4 is 120° to 150°, preferably 135°. The width of the side strip 4, that is, the depth L3 of the side groove 6 is 20-30 mm.

[0029] The size of the block 1 is determined by the actual window size of the core. Assuming that the length of the block 1, i.e., the distance between the two short sides, is L, and the distance between the outer bottom edge of the side groove 6 and the corresponding short side of the block 1, i.e., the length of the limiter 7, is L1, then the range of L1 / L is 0.15~0.25. The longer the length L of the block 1, the smaller the value of the coefficient.

[0030] Furthermore, a through hole 5 is provided in the limiting platform 7, and the opening of the through hole is provided with a 45-degree chamfer. The distance L2 between the center of the through hole 5 and the corresponding short side of the block 1 is 15-45 mm, and the distance L4 between the center of the through hole 5 and the corresponding long side is 23-33 mm. While ensuring the strength of the limiting platform 7, it can also ensure that the strapping belt 2 is fixed to both ends of the core column as much as possible.

[0031] Furthermore, a groove 3 is provided at the inner bottom edge of the side groove 6. The groove 3 and the side strip 4 form a reserved hole, which is convenient for adding a packing belt 2 in the middle.

[0032] In this embodiment, the core block and the side strip 4 are both made of 30 mm thick Q235A steel plate and processed by wire cutting. The length tolerance of the side strip 4 and the side groove 6 is controlled within (0, +0.5 mm), the width tolerance of the side strip 4 is controlled within (0, +0.1 mm), and the remaining tolerances are controlled within (-0.2 mm, +0.2 mm).

[0033] During annealing, the side strip 4 is embedded in the side groove 6, and the strapping tape 2 is tied at the strapping hole 5. If necessary, the strapping tape 2 can be added at the reserved hole according to the situation. After annealing is completed, the strapping tape 2 is removed first, then the side strip 4 is removed, and finally the block 1 is removed.

[0034] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A three-dimensional wound core block, comprising a block (1), two long sides of the block (1) are provided with side grooves (6), the core block further comprising side strips (4) installed in the side grooves (6), the side grooves (6) and the side strips (4) being of the same shape, characterized in that: The side groove (6) is in the shape of an isosceles trapezoid, and the length of its outer bottom side is greater than that of its inner bottom side; A limiting platform (7) is formed between the end of the side groove (6) and the corresponding short side of the block (1).

2. The three-dimensional wound core block according to claim 1, characterized in that: Assuming that the length of the block (1), i.e. the distance between the two short sides, is L, and the distance between the outer bottom edge of the side groove (6) and the corresponding short side edge of the block (1), i.e. the length of the limit platform (7), is L1, then the range of L1 / L is 0.15-0.

25.

3. The three-dimensional wound core block according to claim 1, characterized in that: The limiting platform (7) is provided with a belt threading hole (5).

4. The three-dimensional wound core block according to claim 3, characterized in that: The distance L2 between the center of the belt-through hole (5) and the corresponding short side of the block (1) is 15 to 45 mm.

5. The three-dimensional wound core block according to claim 3, characterized in that: The distance L4 between the center of the belt hole (5) and the corresponding side long side is 23-33 mm.

6. The three-dimensional wound core block according to claim 1, characterized in that: The width of the side strip (4), i.e. the depth L3 of the side groove (6), is 20-30 mm.

7. The three-dimensional wound core block according to any one of claims 1 to 6, characterized in that: A groove (3) is provided at the inner bottom edge of the side groove (6).

8. The three-dimensional wound core block according to any one of claims 1 to 6, characterized in that: The obtuse angle of the inner side of the edge strip (4) is 120° to 150°.

9. The three-dimensional wound core block according to claim 8, characterized in that: The obtuse angle of the inner side of the edge strip (4) is 135°.

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