A device for shaping a transformer insulating cylinder and a method of manufacturing

Abstract

The present application relates to the technical field of transformer manufacturing, and especially relates to a transformer insulation cylinder shaping device and manufacturing method. The manufacturing method first makes insulation material plates of a certain length into circular insulation cylinders with a determined circumference, then utilizes the material properties of the insulation material plates to stretch out two flat edges of the insulation cylinder to be shaped, and utilizes two groups of shaping clamps to respectively put the two flat edges into the flat gaps between the two shaping clamps in one group. The size of the shaping clamps satisfies that the width of the flat gap is equal to the width of the flat edge, and the height of the flat gap is greater than or equal to the height of the flat edge. The overall stability of the two groups of shaping clamps is maintained by the tension of the insulation cylinder itself, or a fixed structure is connected between the two groups of shaping clamps to maintain the overall stability of the two groups of shaping clamps and the insulation cylinder. Finally, the whole is put into an oven for heat drying and shaping. The present application mainly solves the technical problems of high processing cost and inconvenience of movement of the long circular insulation cylinder shaping mold in the prior art.

Description

Technical Field

[0001] This invention relates to the field of transformer manufacturing technology, and in particular to a shaping device and manufacturing method for transformer insulation cylinders. Background Technology

[0002] Transformer coils consist of low-voltage and high-voltage coils. To prevent overcurrent between the low-voltage and high-voltage coils, an insulating cylinder is installed between them. Common insulating cylinders are made of PET. PET is short for polyethylene terephthalate, the most important type of thermoplastic polyester, commonly known as polyester resin. PET is a milky white or light yellow, highly crystalline polymer with a smooth and glossy surface. It has excellent physical and mechanical properties over a wide temperature range, with a long-term operating temperature up to 120℃. It has excellent electrical insulation properties, even at high temperatures and high frequencies, but its corona resistance is relatively poor. It exhibits good creep resistance, fatigue resistance, abrasion resistance, and dimensional stability.

[0003] The existing processing method for elongated oval insulating cylinders usually involves using an elongated oval forming mold. The elongated oval forming mold is made by rolling a steel plate into an elongated oval cylindrical shape or by directly processing a steel block into an elongated cylindrical shape. The PET insulating board material is wrapped around the elongated oval forming mold, and the two ends are fixed with forming tape. Then the mold is placed in an oven for heat drying and shaping. After shaping, it is demolded to form an elongated oval insulating cylinder.

[0004] The above-mentioned method of shaping oblong insulating cylinders requires the customization and processing of different shaping molds for different models of insulating cylinders. Since the mold needs to contact the entire insulating cylinder, a lot of material is used for the mold, resulting in a high overall processing cost. In addition, the shaping mold itself is heavy, making it inconvenient to move during the production and processing process. Summary of the Invention

[0005] The purpose of this invention is to provide a method for manufacturing transformer insulating cylinders, in order to solve the technical problems of existing elongated insulating cylinder shaping molds, which require the mold to contact the entire insulating cylinder, resulting in a large amount of material used, high overall processing costs, and heavy shaping molds that are inconvenient to move during production and processing; the purpose of this invention is also to provide a shaping device for transformer insulating cylinders, in order to solve the above problems.

[0006] To achieve the above objectives, the manufacturing method of the transformer insulating cylinder in this invention adopts the following technical solution:

[0007] A method for manufacturing a transformer insulation cylinder involves first forming a circular insulation cylinder with a defined circumference from an insulation board of a certain length. Then, utilizing the material properties of the insulation board itself, two straight edges of the insulation cylinder to be formed are stretched out. Using two sets of shaping clamps, the two straight edges are respectively placed into the straight gap between two shaping clamps in one set. The dimensions of the shaping clamps satisfy that the width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than or equal to the height of the straight edge. The overall stability of the two sets of shaping clamps is maintained by the tension of the insulation cylinder itself, or by connecting and fixing structures between the two sets of shaping clamps to maintain the overall stability of the two sets of shaping clamps and the insulation cylinder. Finally, the whole assembly is placed in an oven for heat drying and shaping.

[0008] The beneficial effects of the above technical solution are as follows: This invention innovatively designs a method for manufacturing an insulating cylinder. First, an insulating material plate of a certain length is made into a circular insulating cylinder with a defined circumference. After stretching straight edges on opposite sides of the insulating cylinder, a shaping clamp is used to fix the straight edges. Only an insulating material plate of a defined length can be made into an insulating cylinder with a defined circumference. With an insulating cylinder of a defined circumference, after determining the lengths of the two straight edges, the elasticity and tension generated by the material properties of the insulating material plate itself allow the insulating cylinder to form a dimensionally stable elongated oval shape. The dimensionally stable elongated oval insulating cylinder formed at this time is the desired shape. Therefore, the dimensions of the shaping clamp need to meet the requirement that the width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than or equal to the height of the straight edge, ensuring that the straight edges of the insulating cylinder are completely covered and shaped. For materials with no elasticity and tension or poor elasticity and tension, a connecting and fixing structure is needed between the two sets of shaping clamps to maintain the overall stability of the two sets of shaping clamps and the insulating cylinder. Then, the whole assembly is placed in an oven for heat drying and shaping.

[0009] Compared to the existing technology that uses elongated cylindrical or block-shaped molding molds to shape insulating cylinders, this method only requires the use of shaping clamps that hold two straight edges together. The shaping clamps only need to fix and contact the two straight edges, reducing the amount of raw materials used and effectively lowering processing costs. Furthermore, the shaping clamps are significantly lighter than the molds, thereby improving the ease of movement during the processing. Elongated cylindrical insulating cylinders shaped using the above method are easy to operate and effectively reduce processing costs.

[0010] To achieve the above objectives, the transformer insulation cylinder shaping device of the present invention adopts the following technical solution:

[0011] A shaping device for a transformer insulation cylinder includes two sets of shaping clamps. Each set includes two parallel and spaced-apart shaping clamps. A straight gap, adapted to the wall thickness of the insulating material plate being formed, is provided between the two shaping clamps in each set to allow the straight edge of the circular insulation cylinder to be formed to be inserted. The width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than or equal to the height of the straight edge. The two sets of shaping clamps maintain overall stability using the tension of the insulation cylinder itself, or a fixed structure connects the two sets of shaping clamps to maintain overall stability between the two sets of shaping clamps and the insulation cylinder.

[0012] The beneficial effects of the above technical solution are as follows: This invention innovatively designs a shaping device for an insulating cylinder, including two sets of shaping clamps, which can shape two straight edges on the insulating cylinder. Each set includes two parallel and spaced-apart shaping clamps. The purpose of the spaced-apart arrangement is to form a straight gap between the two shaping clamps in one set that matches the wall thickness of the insulating material plate of the forming insulating cylinder, thereby facilitating the insertion of the straight edges of the circular insulating cylinder to be formed. Then, the opposite sides of the circular insulating cylinder are placed into the straight gap between the shaping clamps, which can form two relatively parallel straight edges. The circumference of the insulating cylinder is determined. After the two straight edges are determined, the insulating material plate with a certain thickness forms an elongated oval shape with a certain size by its own elasticity and tension. For materials with poor elasticity, a connecting and fixing structure is required between the two sets of shaping clamps to maintain the overall stability of the two sets of shaping clamps and the insulating cylinder. The elongated oval insulating cylinder is placed in an oven for heating and shaping. Different shaping clamps are required for different types of elongated oval insulating cylinders. Compared to the existing elongated cylindrical or block-shaped shaping molds, this method only requires two straight-edged shaping clamps. These clamps only need to fix and contact the two straight edges, reducing the amount of raw materials used and effectively lowering processing costs. Furthermore, the shaping clamps are significantly lighter than molds, improving the ease of movement during processing. Elongated oval insulating cylinders shaped using this method are easy to operate and effectively reduce processing costs.

[0013] As a further optimized technical solution, the shaping device also includes an operating rod for connecting to the top of the two sets of shaping clamps, so as to facilitate the overall lifting and lowering of the two sets of shaping clamps and the insulating cylinder.

[0014] The beneficial effect of the above technical solution is that by setting an operating rod on the top of the shaping clamp, it is convenient to lift and put down the two sets of shaping clamps and the insulating cylinder, thereby facilitating the movement of the insulating cylinder.

[0015] As a further optimized technical solution, the operating rod is used to pass through two sets of shaping clamps, and the two ends of the operating rod pass through the shaping clamps to form suspension ends. The shaping device also includes a support frame. The operating rod is suspended on the support frame through the suspension ends, and the two sets of shaping clamps and the insulating cylinder are located inside the support frame.

[0016] The beneficial effects of the above technical solution are as follows: the support frame forms a stable support structure, which is conducive to the stable placement of the shaping clamps. The operating rod is suspended on the support frame through the suspension end, which can hang the clamped and shaped elongated insulating cylinder, making it convenient to place and remove the insulating cylinder into the oven. The two sets of shaping clamps and the insulating cylinder are located inside the support frame, which can form a stable protection for the insulating cylinder, so that the insulating cylinder is not subjected to additional force during the heating and shaping process, thereby avoiding additional deformation of the insulating cylinder and ensuring the shaping quality.

[0017] As a further optimized technical solution, the support frame is a frame structure, including an upper frame, a lower frame, and columns connecting the upper frame and the lower frame. Both the upper frame and the lower frame include two horizontal beams and two vertical beams. The suspension end is used to suspend the two horizontal beams or two vertical beams of the upper frame.

[0018] The beneficial effects of the above technical solution are as follows: the support frame is a frame structure, the overall structure is simple, easy to process and manufacture, and easy to move, while providing stable support for the operating rod.

[0019] As a further optimized technical solution, a pad is sandwiched between the bottoms of the two shaping clamps in a set. The thickness of the pad is the same as the wall thickness of the insulating material board to control the straight gap. The top surface of the pad is used to support the insulating cylinder. An opening is formed between the tops of the two shaping clamps in a set for inserting the straight edge.

[0020] The beneficial effects of the above technical solution are as follows: by setting a pad, the gap between the two shaping clamps can be easily controlled, which facilitates processing and manufacturing. At the same time, the pad can also provide support for the insulating cylinder. An opening is formed between the tops of the shaping clamps for the straight edge to be inserted, which facilitates the insertion of the insulating cylinder into the shaping clamps from top to bottom.

[0021] As a further optimized technical solution, the pad is fixedly connected to two shaping clamps in a set by rivets.

[0022] The beneficial effects of the above technical solution are as follows: the pad is fixedly connected to the shaping clamp by using rivets, thereby ensuring that the connection is stable and not easy to loosen, and thus ensuring that the gap between the two shaping clamps does not change easily with frequent use.

[0023] As a further optimized technical solution, the shaping device also includes a clamping element for clamping the top ends of two shaping clamps in a set.

[0024] The beneficial effects of the above technical solution are as follows: by using clamping components to clamp and fix the insulating cylinder, the fixing effect of the shaping clamping plate is ensured, and the insulating cylinder is prevented from deforming when the shaping clamping plate clamps the insulating cylinder, thereby ensuring the shaping quality.

[0025] As a further optimized technical solution, the shaping clamp used to be set inside the straight edge in each group of shaping clamps is defined as the inner shaping clamp, and the inner shaping clamp is provided with flanges folded inward at both ends in the width direction.

[0026] The beneficial effects of the above technical solution are as follows: the flange on the inner shaping clamp can increase the strength of the inner shaping clamp and improve its service life; at the same time, the flange structure of the inner shaping clamp can prevent the inner shaping clamp from having sharp edges, thereby preventing the inner surface of the insulating cylinder from being scratched by the sharp edges of the shaping clamp during the clamping process.

[0027] As a further optimized technical solution, the shaping clamp used to be set inside the straight edge in each set of shaping clamps is defined as the inner shaping clamp, and the shaping clamp used to be set outside the straight edge is defined as the outer shaping clamp. The inner shaping clamp has flanges folded inward at both ends in the width direction, and the outer shaping clamp has flanges folded outward at both ends in the width direction.

[0028] The beneficial effects of the above technical solution are as follows: the outer shaping clamp and the inner shaping clamp are respectively provided with a flange structure, which can easily increase the strength of the shaping clamp and improve the service life of the shaping clamp, thereby avoiding deformation of the shaping clamp when clamping the insulating cylinder. In addition, the inward flange structure of the inner shaping clamp can also prevent damage to the inner surface of the insulating cylinder during the clamping process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the shaping device for the transformer insulating cylinder of the present invention;

[0030] Figure 2 This is a schematic diagram of the shaping clamp, insulating cylinder, and operating rod structure of Embodiment 1 of the shaping device for the transformer insulating cylinder of the present invention;

[0031] Figure 3 This is a schematic diagram of the shaping clamping plate structure of Embodiment 1 of the shaping device for the transformer insulating cylinder of the present invention;

[0032] Figure 4 This is a schematic diagram of the support frame structure of Embodiment 1 of the shaping device for the transformer insulating cylinder of the present invention.

[0033] In the diagram: 1. Insulating cylinder; 2. Shaping clamp; 21. Flanged edge; 3. Operating lever; 4. Support frame; 41. Upper frame; 42. Lower frame; 43. Column; 5. Pad; 6. Rivet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0038] Embodiment 1 of the shaping device for the transformer insulating cylinder of the present invention:

[0039] This invention innovatively designs a shaping device for transformer insulation cylinders. By using two sets of shaping clamps 2 instead of the existing elongated oval shaping mold, the insulation material board is first processed into a circular insulation cylinder 1. Parallel straight edges are stretched from opposite sides of the circular insulation cylinder 1 and placed into the straight gap between each set of shaping clamps. This allows the insulation cylinder 1, which has a certain thickness, to form a dimensionally stable elongated oval insulation cylinder 1 through the elasticity and tension generated by its own material properties, in conjunction with the two sets of shaping clamps. Then, the elongated oval insulation cylinder 1 is placed in an oven for heating and shaping.

[0040] In this embodiment, the insulating board is made of PET material and has a thickness of 1.1 mm. Figure 1 , Figure 3 As shown, the shaping device specifically includes two sets of shaping clamps 2. Each set includes two shaping clamps 2 arranged in parallel and spaced apart. A straight gap exists between the two shaping clamps 2 in one set, adapted to the wall thickness of the insulating material plate used to form the insulating cylinder 1, allowing the straight edge of the circular insulating cylinder 1 to be inserted. To form this straight gap, a pad 5 is sandwiched between the bottoms of the two shaping clamps 2 in one set. The thickness of the pad 5 is the same as the wall thickness of the insulating material plate, thus controlling the thickness of the straight gap to match the thickness of the insulating material plate. This prevents the thickness of the oblong insulating cylinder 1 from changing during the heating and shaping process, which could lead to uneven overall thickness of the insulating cylinder 1. Simultaneously, the top surface of the pad 5 can support the insulating cylinder 1. The pad 5 is fixedly connected to the two shaping clamps 2 in one set by rivets 6, ensuring a stable connection that is not easily loosened, and thus ensuring that the straight gap between the two shaping clamps 2 does not easily change with frequent use.

[0041] To facilitate the placement and removal of the insulating cylinder 1, an opening is formed between the tops of the two shaping clamps 2 in a set, allowing the straight edge to be inserted. Clamping elements are installed on this opening to facilitate the clamping and fixing of the insulating cylinder 1, ensuring the clamping effect of the shaping clamps 2 and preventing deformation of the insulating cylinder when clamped, thereby guaranteeing the shaping quality. In this embodiment, the clamping elements are common clips. In practical use, the insulating cylinder 1 is placed into the shaping clamps through the top opening of the shaping clamps 2, and then the clips are used to clamp the top opening of the shaping clamps 2.

[0042] To ensure that the insulating cylinder 1 forms an elongated oval shape of the specified dimensions, the lengths of the two straight sides need to be determined for a circular insulating cylinder 1 with a fixed circumference. Therefore, the width of the straight gap of the shaping clamp 2 needs to be equal to the width of the straight side, and the height of the straight gap needs to be greater than the height of the straight side. That is, the width of the shaping clamp 2 is equal to the width of the straight side, and the height of the shaping clamp 2 is greater than the height of the straight side. The two sets of shaping clamps 2 maintain the overall stability using the tension of the insulating cylinder 1 itself. Specifically, an insulating material board of a certain length is made into a circular insulating cylinder 1 with a fixed circumference. After stretching out straight sides on opposite sides of the insulating cylinder 1, the straight sides are fixed using shaping clamps. With a fixed circumference, after determining the lengths of the two straight sides, the insulating cylinder 1 can form a dimensionally stable elongated oval shape due to the elasticity and tension generated by the material properties of the insulating material board itself. The dimensionally stable elongated oval insulating cylinder formed at this time is the required shape.

[0043] To ensure the structural strength and operational stability of the shaping clamps, the shaping clamp 2 used to be set on the inside of the straight edge in each set of shaping clamps 2 is defined as the inner shaping clamp 2, and the shaping clamp 2 used to be set on the outside of the straight edge is defined as the outer shaping clamp 2. The inner shaping clamp 2 has flanges 21 folded inward at both ends in the width direction, and the outer shaping clamp 2 has flanges 21 folded outward at both ends in the width direction. The flanges 21 structure of the outer shaping clamp 2 and the inner shaping clamp 2 increases the strength of the shaping clamp 2, thereby preventing the shaping clamp 2 from deforming when clamping the insulating cylinder 1. The flanges 21 structure of the inner shaping clamp 2 prevents the appearance of sharp edges on the inner shaping clamp 2, thereby preventing the inner surface of the insulating cylinder from being scratched by the sharp edges of the shaping clamp 2 during the clamping process.

[0044] like Figure 2 As shown, the shaping device also includes an operating rod 3 for connecting to the top of the two sets of shaping clamps 2, so as to facilitate the overall lifting and lowering of the two sets of shaping clamps 2 and the insulating cylinder 1, thereby facilitating the movement of the insulating cylinder 1. Specifically, the operating rod 3 is connected to the shaping clamps 2 by passing through the two sets of shaping clamps 2. Hanging holes are provided at the same height on both sets of shaping clamps 2. The operating rod 3 directly passes through the hanging holes on the two sets of shaping clamps. By using the middle part of the operating rod 3 as the operating part, the two sets of shaping clamps 2 and the insulating cylinder 1 can be picked up and put down. In this embodiment, the operating rod 3 uses a screw. The advantage of using a screw is that the thread on the screw increases the friction between the shaping clamps 2 and the operating rod 3, thereby preventing the shaping clamps 2 from sliding on the operating rod, thus facilitating the stability of the distance between the two shaping clamps 2 and the movement of the two sets of shaping clamps 2 and the insulating cylinder 1.

[0045] like Figure 1 , Figure 4 As shown, the shaping device also includes a support frame 4. The two ends of the operating rod 3 extend through the shaping clamps 2 to form suspension ends. The operating rod 3 is suspended on the support frame 4 through the suspension ends, and the two sets of shaping clamps 2 and the insulating cylinder 1 are located inside the support frame 4. The support frame 4 forms a stable support structure, which is conducive to the stable placement of the shaping clamps 2. The operating rod 3 is suspended on the support frame 4 through the suspension ends, which can hang the clamped and shaped elongated insulating cylinder 1. This not only makes it convenient to place and take out the insulating cylinder 1 into the oven, but also provides stable protection for the insulating cylinder 1, so that the insulating cylinder 1 is not subjected to additional force during the heating and shaping process, thereby avoiding additional deformation of the insulating cylinder 1 and ensuring the shaping quality.

[0046] The support frame 4 has a frame structure. The frame structure is simple in overall structure, easy to process and manufacture, lightweight and easy to move. Specifically, it includes an upper frame 41, a lower frame 42 and a column 43 connecting the upper frame 41 and the lower frame 42. Both the upper frame 41 and the lower frame 42 include two horizontal beams and two vertical beams. The suspension end is used to suspend on the two horizontal beams or two vertical beams of the upper frame 41.

[0047] Embodiment 2 of the shaping device for transformer insulating cylinder in this invention:

[0048] The difference between this embodiment and Embodiment 1 is that this embodiment provides a different type of shaping clamp, unlike Embodiment 1, where the two clamps in Embodiment 1 are each provided with flanges. In this embodiment, neither of the two shaping clamps in each set of shaping clamps is provided with flanges; the clamping of the insulating cylinder is ensured solely by the structural strength of the two shaping clamps themselves.

[0049] Embodiment 3 of the shaping device for transformer insulating cylinder in this invention:

[0050] The difference between this embodiment and Embodiment 1 is that this embodiment provides a different type of shaping clamp. In this embodiment, only the inner shaping clamp in each set of shaping clamps is provided with an inward flange to increase the strength of the inner shaping clamp and avoid the appearance of sharp edges on the inner shaping clamp, thereby preventing the inner surface of the insulating cylinder from being scratched by the sharp edges of the shaping clamp during the clamping process.

[0051] Embodiment 4 of the shaping device for transformer insulating cylinder in this invention:

[0052] The difference between this embodiment and Embodiment 1 is that this embodiment provides a clamping component that differs from that in Embodiment 1. In this embodiment, the clamping component is a locking structure. A locking component and a connecting component are fixedly connected to the two opposite side walls of the two shaping clamps in each set of shaping clamps. By flipping the connecting component and engaging it with the locking component, the opening at the top of the shaping clamp is locked. In other embodiments, through holes can be opened at the same position on each set of shaping clamps. The opening at the top of the shaping clamp is locked by passing a bolt through the through hole and tightening it with a nut.

[0053] Embodiment 5 of the transformer insulation cylinder shaping device of the present invention:

[0054] The difference between this embodiment and embodiment 1 is that this embodiment provides a different connection method between the shaping clamp and the pad than that in embodiment 1. In this embodiment, the pad and two shaping clamps in a set are fixedly connected by bolts and nuts.

[0055] Embodiment 6 of the shaping device for transformer insulating cylinder in this invention:

[0056] The difference between this embodiment and embodiment 1 is that this embodiment provides a different way of ensuring a straight gap between the two shaped clamping plates. In this embodiment, a positioning post can be used to form a straight gap between the two clamping plates. In other embodiments, a screw and nut can also be used to maintain a fixed gap. When the positioning post and screw and nut are used, the positioning post and screw do not support the insulating material plate. At this time, the positioning clamping plates fix the insulating cylinder between a set of positioning clamping plates by bolts at the top and bottom.

[0057] Embodiment 7 of the shaping device for transformer insulating cylinder in this invention:

[0058] The difference between this embodiment and embodiment 1 is that this embodiment provides a different way of setting the opening of the shaping clamp than that in embodiment 1. In this embodiment, the opening of the clamp is set at the bottom, and the shaping clamp is clamped on the insulating cylinder from top to bottom when using the clamp.

[0059] Embodiment 8 of the shaping device for transformer insulating cylinder in this invention

[0060] The difference between this embodiment and Embodiment 1 is that this embodiment provides a support frame that is different from that in Embodiment 1. In this embodiment, the support frame is a cylindrical structure formed by four side plates. In other embodiments, it can also be two opposing triangular frames with their bottoms fixed. The top of the triangular frames is provided with a fixing groove for placing the operating rod. By placing the suspension end of the operating rod on the fixing groove, the insulating cylinder is suspended and supported.

[0061] Embodiment 9 of the shaping device for transformer insulating cylinder in this invention:

[0062] The difference between this embodiment and Embodiment 1 is that this embodiment provides a different method of supporting the insulating cylinder than Embodiment 1. In this embodiment, there is no support frame; the insulating cylinder is supported by clamps. In other embodiments, there is no support frame; the operating rod can directly pass through and connect to the shaping clamps, or fixing blocks can be set on the two inner sides of the two sets of shaping clamps facing each other, with horizontal fixing grooves formed on the fixing blocks. The operating rod connects to the shaping clamps by connecting to the fixing grooves.

[0063] Embodiment 10 of the transformer insulation cylinder shaping device of the present invention:

[0064] The difference between this embodiment and embodiment 1 is that this embodiment provides an insulating cylinder method that moves and fixes the upper shaping clamp, which is different from that of embodiment 1. In this embodiment, there is no operating lever. At this time, the insulating cylinder is lifted and lowered by moving two sets of shaping clamps.

[0065] Embodiment 11 of the shaping device for transformer insulating cylinder in this invention:

[0066] The difference between this embodiment and Embodiment 1 is that this embodiment provides an insulating material board that is different from that in Embodiment 1. In this embodiment, the insulating material board is an insulating material that is not elastic, such as polyimide glass cloth. At this time, a fixed structure, such as a support bracket, is connected between the two sets of shaping clamps. Specifically, the connection method is to fix positioning blocks on the two inner shaping clamps opposite to the two sets of shaping clamps. The support bracket supports the two sets of shaping clamps by being placed on the positioning blocks, so that the two sets of shaping clamps and the insulating cylinder maintain overall stability.

[0067] Embodiment 12 of the shaping device for transformer insulating cylinder in this invention:

[0068] The difference between this embodiment and embodiment 1 is that this embodiment provides a straight gap that is different from that in embodiment 1. In this embodiment, the height of the straight gap is equal to the height of the straight edge. At this time, the shaping clamp just completely clamps the straight edge.

[0069] Example 1 of the manufacturing method of the transformer insulating cylinder of the present invention:

[0070] This invention innovatively provides a method for manufacturing a transformer insulating cylinder. First, an insulating material sheet of a certain length is formed into a circular insulating cylinder 1 with a defined circumference. The insulating cylinder 1 is made of PET material with a thickness of 1.1mm. Then, utilizing the inherent material properties of the insulating material sheet—its inherent hardness and elasticity—it generates tension. After determining the circumference of the insulating cylinder 1 and then determining two straight edges, the insulating cylinder 1 can form a dimensionally stable elongated oval. Therefore, using the transformer insulating cylinder shaping device in the above embodiment, the insulating cylinder is stretched... 1. After the two straight edges to be formed are placed into the straight gap of the shaping clamp 2, the dimensions of the shaping clamp 2 are such that the width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than the height of the straight edge, thereby ensuring that the straight edge of the insulating cylinder is completely covered and shaped. The tension of the insulating material plate itself is used to maintain the overall stability of the two sets of shaping clamps 2, and to ensure that the cylinder maintains a stable shape when placed in the oven in the next process without external force. Then, the shaped insulating cylinder is placed in the oven for baking and shaping. In this embodiment, the hot baking and shaping temperature is 130°C and the temperature is maintained for 30 minutes.

[0071] Example 2 of the manufacturing method of the transformer insulating cylinder of the present invention:

[0072] The difference between this embodiment and Embodiment 1 is that this embodiment provides an insulating material board that is different from that in Embodiment 1. In this embodiment, the insulating material board is made of other non-elastic insulating materials, such as polyimide glass cloth. In this case, a fixed structure, such as a support bracket, is connected between the two sets of shaping clamps. Specifically, positioning blocks are fixed on the two inner shaping clamps opposite to the two sets of shaping clamps. The support bracket supports the two sets of shaping clamps by being placed on the positioning blocks, so that the two sets of shaping clamps and the insulating cylinder maintain overall stability.

[0073] Example 3 of the method for manufacturing the transformer insulating cylinder of the present invention:

[0074] The difference between this embodiment and embodiment 1 is that this embodiment provides a straight gap that is different from that in embodiment 1. In this embodiment, the height of the straight gap is equal to the height of the straight edge. At this time, the shaping clamp just completely clamps the straight edge.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for manufacturing a transformer insulating cylinder, characterized in that, First, a certain length of insulating material board is made into a circular insulating cylinder (1) with a defined circumference. Then, using the material properties of the insulating material board itself, the two straight edges of the insulating cylinder (1) to be formed are stretched out. Using two sets of shaping clamps (2), the two straight edges are respectively placed into the straight gap between the two shaping clamps (2) in one set. The dimensions of the shaping clamps (2) satisfy that the width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than or equal to the height of the straight edge. The overall stability of the two sets of shaping clamps (2) is maintained by the tension of the insulating cylinder (1) itself, or a fixed structure is connected between the two sets of shaping clamps (2) to maintain the overall stability of the two sets of shaping clamps (2) and the insulating cylinder. The two ends of the operating rod are respectively passed through the top of the two sets of shaping clamps and suspended on the support frame. Finally, the whole is placed in the oven for heat drying and shaping.

2. A shaping device for a transformer insulating cylinder, characterized in that, The shaping device includes a support frame, an operating rod, and two sets of shaping clamps (2). Each set includes two shaping clamps (2) arranged in parallel and spaced apart. There is a straight gap between the two shaping clamps (2) in a set to match the wall thickness of the insulating material plate of the forming insulating cylinder (1) so that the straight edge of the circular insulating cylinder (1) to be formed can be inserted. The width of the straight gap is equal to the width of the straight edge, and the height of the straight gap is greater than or equal to the height of the straight edge. The two sets of shaping clamps (2) maintain overall stability by utilizing the tension of the insulating cylinder (1) itself, or the two sets of shaping clamps (2) are connected by a fixed structure so that the two sets of shaping clamps (2) and the insulating cylinder (1) maintain overall stability. The two ends of the operating rod pass through the top of the two sets of shaping clamps and are suspended on the support frame.

3. The shaping device for transformer insulating cylinders according to claim 2, characterized in that, The operating lever is a screw, which increases the friction between the shaping clamp and the operating lever through the thread on the operating lever.

4. The shaping device for transformer insulating cylinders according to claim 2, characterized in that, The support frame is a cylindrical structure formed by four side plates, or the support frame includes two opposing triangular frames with their bottoms fixed, and the top of the triangular frames is provided with a fixing groove for placing the operating rod.

5. The shaping device for transformer insulating cylinders according to claim 2, characterized in that, The support frame (4) is a frame structure, including an upper frame (41), a lower frame (42) and a column (43) connecting the upper frame (41) and the lower frame (42). The upper frame (41) and the lower frame (42) each include two horizontal beams and two vertical beams. The operating rods protrude from both ends of the shaping clamp and are used to suspend on the two horizontal beams or two vertical beams of the upper frame (41).

6. The shaping device for transformer insulating cylinders according to any one of claims 2-5, characterized in that, A pad (5) is sandwiched between the bottoms of two shaping clamps (2) in a set. The thickness of the pad (5) is the same as the wall thickness of the insulating material plate to control the straight gap. The top surface of the pad (5) is used to support the insulating cylinder (1). An opening is formed between the tops of the two shaping clamps (2) in a set for the straight edge to be inserted.

7. The shaping device for transformer insulating cylinders according to claim 6, characterized in that, The pad (5) is fixedly connected to the two shaping clamps (2) in the set by rivets (6).

8. The shaping device for transformer insulating cylinders according to claim 6, characterized in that, The shaping device also includes clamping elements for clamping the top ends of two shaping clamps (2) in a set.

9. The shaping device for transformer insulating cylinders according to any one of claims 2-5, characterized in that, The shaping clamp (2) used to be set inside the straight edge in each group of shaping clamps (2) is defined as the inner shaping clamp. The inner shaping clamp has flanges (21) that fold inward at both ends in the width direction.

10. The shaping device for transformer insulating cylinders according to any one of claims 2-5, characterized in that, In each set of shaping clamps (2), the shaping clamp (2) used to be set inside the straight edge is defined as the inner shaping clamp, and the shaping clamp (2) used to be set outside the straight edge is defined as the outer shaping clamp. The inner shaping clamp is provided with flanges (21) folded inward at both ends in the width direction, and the outer shaping clamp is provided with flanges (21) folded outward at both ends in the width direction.

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