A kind of processing device for highland barley paper angle ring of transformer core

Abstract

This utility model discloses a processing device for barley paper corner rings for current transformer cores, belonging to the field of auxiliary tooling technology for current transformers. It includes a barley paper roll formed by winding barley paper strips. A cutting module and a folding module are sequentially arranged on the paper output side of the barley paper roll. The cutting module cuts half of the barley paper strip in the width direction. The folding module includes an upper pressing mold and a lower pressing mold. The lower part of the upper pressing mold has a triangular cross-section that acts on the center line of the barley paper strip, and the pressing part extends along the length direction of the barley paper strip. The top surface of the lower pressing mold has a pressing groove to receive the pressing part. The cutting module first cuts half of the barley paper strip in the width direction, with the cutting operations spaced apart along the length direction of the barley paper strip. Under the action of the pressing part, the barley paper strip is folded along the center line of its width, thus forming a cut-then-fold operation. This directly improves work efficiency and ensures processing accuracy through mechanical processing.

Description

Technical Field

[0001] This utility model belongs to the field of auxiliary tooling technology for current transformers, specifically a device for processing barley paper corner rings for current transformer cores. Background Technology

[0002] Cast-resin current transformers are current transformers encapsulated using insulating materials such as epoxy resin. The use of high-quality epoxy resin as the insulating medium gives the product excellent electrical insulation properties, effectively preventing the intrusion of moisture and other contaminants, ensuring the safety and stability of equipment operation. The casting material not only provides excellent insulation protection but also endows the transformer with high mechanical strength, enabling it to maintain structural integrity and dimensional stability in harsh working environments. These characteristics make cast-resin current transformers an important and widely used piece of equipment in power systems.

[0003] The iron core and coil of a current transformer are its core components. After epoxy resin is poured in, the resin shrinkage exerts a squeezing effect on the iron core. The sharp corners of the iron core are prone to excessive stress concentration, leading to epoxy resin cracking and affecting the performance and service life of the current transformer. Therefore, multiple layers of wrapping and buffering are used to ensure the uniformity of the electric field distribution, providing a guarantee for the long-term stable operation of the transformer. Barley paper (also known as barley shell paper) is a type of paper with high mechanical strength used as an insulating material. Barley paper corner rings are used to protect the sharp corners of the iron core during wrapping. Previously, the production of barley paper corner rings involved workers manually cutting barley paper strips with scissors and then bending the strips in the center, resulting in extremely low efficiency and severely restricting the production progress of current transformers in mass production. Utility Model Content

[0004] To address the problem of low efficiency in cutting barley paper corner rings, this utility model provides a device for processing barley paper corner rings for transformer cores.

[0005] This utility model is achieved through the following technical solution:

[0006] A device for processing barley paper corner rings for transformer cores includes a barley paper roll formed by winding barley paper strips, wherein a cutting module and a folding module are sequentially provided on the paper output side of the barley paper roll;

[0007] The cutting module can act at intervals along the length of the barley paper strip and cut half of the barley paper strip along its width.

[0008] The origami module includes an upper pressing die and a lower pressing die; the lower part of the upper pressing die is provided with a pressing part with a triangular cross section that acts on the center line of the barley paper strip, and the pressing part extends along the length direction of the barley paper strip; the top surface of the lower pressing die is provided with a pressing groove that receives the pressing part and extends along the length direction of the barley paper strip.

[0009] The cutting module first cuts a notch in half of the barley paper strip along its width, with the notch cuts spaced apart along the length of the strip. Under the action of the extrusion section, the barley paper strip is folded along the center line of its width, thus forming a cut-then-fold operation. This directly improves work efficiency and ensures processing accuracy through mechanical processing.

[0010] A further improvement of this invention is that the cross-section of the extrusion section is an inverted isosceles triangle, and the apex angle of the triangle is acute. This ensures symmetrical fabrication along the centerline of the barley paper strip in the width direction, and the acute extrusion contact angle helps to improve the ideal folding angle shaping of the barley paper strip.

[0011] A further improvement of this invention is that the apex angle of the extrusion section is between 20° and 40°. This helps the material to elastically recover and maintain its shape at a right angle after leaving the barley paper strip, thanks to the extrusion contact angle.

[0012] A further improvement of this invention is that the cross-section of the extrusion groove is triangular, capable of cooperating with the extrusion section. Forming is assisted by extruding the barley paper strip surface facing away from the extrusion section.

[0013] A further improvement of this invention is that the bottom of the extrusion groove is provided with a U-shaped buffer section. This buffer section helps to reduce damage to the bent parts of the barley paper strip.

[0014] A further improvement of this invention is that the cutting module includes an upper cutter and a lower cutter, wherein the upper cutter is capable of moving up and down relative to the lower cutter. The up-and-down movement of the upper cutter relative to the lower cutter enables rapid and intermittent cutting of the barley paper strip.

[0015] A further improvement of this utility model is that the lower edge of the above-mentioned upper cutter is provided with a cutting edge that corresponds to the moving trajectory of the barley paper strip.

[0016] A further improvement of this invention is that one side of the cutting edge is provided with a clearance groove that corresponds to the moving trajectory of the barley paper strip. By cooperating with the cutting edge, the cutting accuracy of cutting half of the barley paper strip in the width direction is improved.

[0017] A further improvement of this invention is that at least one end of the upper cutter is provided with a downwardly extending guide section, which can cooperate with one side of the lower cutter. When the upper cutter moves downward, the guide section cooperates with one side of the lower cutter to form a guide.

[0018] A further improvement of this invention includes a material guiding module located between the barley paper roll and the cutting module. The material guiding module comprises an upper rubber wheel and a lower rubber wheel. Through the contact of the upper and lower rubber wheels with the upper and lower surfaces of the barley paper roll, and in conjunction with the rotation of the rubber wheels, the barley paper roll is guided.

[0019] As can be seen from the above technical solution, the beneficial effects of this utility model are: the cutting module first cuts half of the barley paper strip in the width direction, and the cutting operation of the notch is set at intervals along the length direction of the barley paper strip; under the action of the extrusion part, the barley paper strip is folded along the center line of the width, thus forming a cutting and folding operation, which directly improves the work efficiency through mechanical processing and ensures the processing accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first-view structural diagram of a specific embodiment of the present invention.

[0022] Figure 2 This is a second-view structural diagram of a specific embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the cutting module structure according to a specific embodiment of the present invention.

[0024] Figure 4 This is a first-view structural diagram of the origami module according to a specific embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the second-view structure of the origami module according to a specific embodiment of the present invention.

[0026] In the attached diagram: 10, barley paper roll; 11, barley paper strip; 20, material guiding module; 21, upper rubber wheel; 22, lower rubber wheel; 30, cutting module; 31, upper cutter; 3101, cutting edge; 3102, clearance groove; 3103, guide section; 32, lower cutter; 40, folding module; 41, upper pressing mold; 4101, extrusion section; 42, lower pressing mold; 4201, extrusion groove; 4202, buffer section. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] like Figures 1 to 5 As shown, this utility model discloses a processing device for barley paper corner rings for transformer cores, including a barley paper roll 10 formed by winding barley paper strip 11. The paper output side of the barley paper roll 10 is provided with a cutting module 30 and a folding module 40 arranged in sequence. The cutting module 30 can act on the length direction of the barley paper strip 11 at intervals and cut half of the width direction of the barley paper strip 11. The folding module 40 includes an upper pressing mold 41 and a lower pressing mold 42. The lower part of the upper pressing mold 41 is provided with a pressing part 4101 with a triangular cross section that acts on the center line of the barley paper strip 11, and the pressing part 4101 extends along the length direction of the barley paper strip 11. The top surface of the lower pressing mold 42 is provided with a pressing groove 4201 for receiving the pressing part 4101 and extends along the length direction of the barley paper strip 11 along the pressing groove 4201.

[0029] The cutting module 30 first cuts half of the barley paper strip 11 in the width direction, and the cutting operation is set at intervals along the length direction of the barley paper strip 11. Under the action of the extrusion part 4101, the barley paper strip 11 is folded along the center line of the width, thus forming a cutting and folding operation. This directly improves the work efficiency through mechanical processing and ensures the processing accuracy.

[0030] The device also includes a material guiding module 20 located between the barley paper roll 10 and the cutting module 30. The material guiding module 20 includes an upper rubber wheel 21 and a lower rubber wheel 22. Through the contact of the upper and lower surfaces of the barley paper roll 11 by the upper rubber wheel 21 and the lower rubber wheel 22, and in conjunction with the rotation of the rubber wheels, the barley paper roll 11 is guided.

[0031] The upper rubber wheel 21 is connected to the drive motor and thus serves as the drive wheel, while the lower rubber wheel 22 is the driven wheel. By pressing the barley paper strip 11 tightly against the upper and lower rubber wheels, the barley paper strip 11 is pulled outward from the barley paper roll 10.

[0032] The extrusion section 4101 has an inverted isosceles triangle cross-section with an acute apex. This ensures symmetrical fabrication along the centerline of the barley paper strip 11 in the width direction, and the acute extrusion contact angle helps to improve the ideal folding angle of the barley paper strip 11. The extrusion groove 4201 has a triangular cross-section that can cooperate with the extrusion section 4101. Extrusion of the barley paper strip 11 facing away from the back of the extrusion section 4101 assists in shaping.

[0033] The apex angle of the extrusion section 4101 is between 20° and 40°. This helps the material to elastically recover and retain its shape at a right angle after leaving the barley paper strip 11 through the extrusion contact angle.

[0034] The apex angle of the extrusion section 4101 is 30°.

[0035] The bottom of the extrusion groove 4201 is also provided with a U-shaped buffer section 4202. This buffer section 4202 helps to reduce damage to the bent parts of the barley paper strip 11.

[0036] The upper pressing die 41 can move up and down relative to the lower pressing die 42 through a crank-connecting rod mechanism to complete the bending operation of the barley paper strip 11.

[0037] The cutting module 30 includes an upper cutter 31 and a lower cutter 32. The upper cutter 31 can move up and down relative to the lower cutter 32. The up and down movement of the upper cutter 31 relative to the lower cutter 32 enables rapid and intermittent cutting of the barley paper strip 11.

[0038] The lower edge of the upper cutter 31 is provided with a cutting edge 3101 that corresponds to the moving trajectory of the barley paper strip 11.

[0039] One side of the cutting edge 3101 is provided with a clearance groove 3102 that corresponds to the moving trajectory of the barley paper strip 11. By cooperating with the cutting edge 3101, the operation accuracy of cutting half of the barley paper strip 11 in the width direction is improved.

[0040] At least one end of the upper cutter 31 is provided with a downwardly extending guide section 3103, which can cooperate with one side of the lower cutter 32. When the upper cutter 31 moves downward, the guide section 3103 cooperates with one side of the lower cutter 32 to form a guide.

[0041] The upper cutter 31 can be driven by another set of crank-connecting rod mechanism or by sharing a set of crank-connecting rod mechanism with the upper pressing mold 41, so that the upper cutter 31 and the lower cutter 32 cooperate to perform intermittent cutting of the barley paper strip 11 along its length direction.

[0042] In summary, the operating principle of this device is as follows: The barley paper roll 10 is placed on the equipment, and the barley paper strip 11 is taken out and passed sequentially through the guiding module 20, the cutting module 30, and the folding module 40. Simultaneously, the upper rubber wheel 21, the upper cutter 31, and the upper pressing mold 41 are driven, causing the barley paper strip 11 to be discharged at a uniform speed. Under the uniform movement of the barley paper strip 11, the upper cutter 31 and the lower cutter 32 work together to cut the barley paper strip 11 at intervals along its length. Subsequently, the cut barley paper strip 11 is promptly bent. By adjusting the pressing speed of the upper pressing mold 41 and the dwell time after pressing, the barley paper strip 11 rebounds due to its own elasticity after being squeezed, achieving a 90° bend. The processed barley paper strip 11 is coiled into a loop for easy storage, that is, it forms a barley paper corner ring.

[0043] When using, wrap the cut barley paper strip 11 around the tip of the iron core, and then wrap the barley paper strip 11 with cushioning materials such as polyester film strip, black tape, crepe paper, and white cloth strip until the iron core is wrapped.

[0044] The present invention discloses a barley paper corner ring processing device for transformer cores. The device first cuts half of the barley paper strip in the width direction using a cutting module. The cutting operation is spaced along the length direction of the barley paper strip. Under the action of the extrusion section, the barley paper strip is folded along the center line of its width, thus forming a cutting-then-folding operation. This directly improves the work efficiency through mechanical processing and ensures the processing accuracy.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for processing barley paper corner rings for transformer cores, comprising a barley paper roll (10) formed by winding barley paper strips (11), characterized in that, The barley paper roll (10) has a cutting module (30) and a folding module (40) arranged sequentially on the paper output side; the cutting module (30) can act on the barley paper strip (11) at intervals along its length and cut half of the width of the barley paper strip (11); the folding module (40) includes an upper pressing mold (41) and a lower pressing mold (42); the lower part of the upper pressing mold (41) has a pressing part (4101) with a triangular cross section that acts on the center line of the barley paper strip (11), and the pressing part (4101) extends along the length of the barley paper strip (11); the top surface of the lower pressing mold (42) has a pressing groove (4201) that receives the pressing part (4101) and extends along the length of the barley paper strip (11) along the pressing groove (4201).

2. The device for processing barley paper corner rings for transformer cores according to claim 1, characterized in that, The cross-section of the extrusion part (4101) is an inverted isosceles triangle, and the apex angle of the triangle is an acute angle.

3. The device for processing barley paper corner rings for transformer cores according to claim 2, characterized in that, The apex angle of the cross section of the extrusion part (4101) is between 20° and 40°.

4. A device for processing barley paper corner rings for transformer cores according to any one of claims 1 to 3, characterized in that, The cross-section of the extrusion groove (4201) is a triangle that can cooperate with the extrusion part (4101).

5. The device for processing barley paper corner rings for transformer cores according to claim 4, characterized in that, The bottom of the extrusion groove (4201) is also provided with a buffer section (4202) with a U-shaped cross section.

6. The device for processing barley paper corner rings for transformer cores according to claim 4, characterized in that, The cutting module (30) includes an upper cutter (31) and a lower cutter (32), wherein the upper cutter (31) is capable of moving up and down relative to the lower cutter (32).

7. The device for processing barley paper corner rings for transformer cores according to claim 6, characterized in that, The lower edge of the upper cutter (31) is provided with a cutting edge (3101) that corresponds to the moving trajectory of the barley paper strip (11).

8. The device for processing barley paper corner rings for transformer cores according to claim 7, characterized in that, The cutting edge (3101) is provided with a clearance groove (3102) on one side that corresponds to the movement trajectory of the barley paper strip (11).

9. The device for processing barley paper corner rings for transformer cores according to claim 6, characterized in that, The upper cutter (31) has a downwardly extending guide section (3103) at at least one end, which can cooperate with one side of the lower cutter (32).

10. A device for processing barley paper corner rings for transformer cores according to any one of claims 1 to 3, characterized in that, It also includes a material guiding module (20) located between the barley paper roll (10) and the cutting module (30), the material guiding module (20) including an upper rubber wheel (21) and a lower rubber wheel (22).

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