Polishing-free pouring mold for dry-type transformer coil

Abstract

The utility model relates to the technical field of transformer coil processing devices, in particular to a dry-type transformer coil polishing-free pouring mold which comprises an operation table and a mold body, a sealing door is installed on the front face of the operation table, a clamping ball is fixedly installed at one end of a first spring, and a plurality of clamping holes used in cooperation with the clamping ball are formed in the mold body. And a plurality of nanoscale exhaust holes are formed in one side of the mold main body. Compared with a traditional dry-type transformer coil pouring mold which needs to be polished after pouring is completed, the dry-type transformer coil pouring mold is provided with the exhaust structure, so that burrs or unevenness can be pretreated to keep the smoothness of the appearance of a coil when the dry-type transformer coil pouring mold is not cooled after pouring, manual or equipment investment does not need to be additionally increased, and the production cost is reduced. The coil polishing device is simple in structure and convenient to operate, the production cycle can be shortened, surface damage of the coil caused by polishing can be avoided, material waste is reduced, and damage to workers caused by polishing dust is further avoided.

Description

Technical Field

[0001] This utility model relates to a dry-type transformer coil casting mold that does not require grinding, and in particular to a dry-type transformer coil casting mold that does not require grinding, belonging to the technical field of transformer coil processing equipment. Background Technology

[0002] The coil is one of the most important electromagnetic circuit structural components of a dry-type transformer, and it plays a crucial role in the reliable operation of the dry-type transformer. The coil is usually manufactured using a special casting mold, and it can be demolded after the casting is completed and cooled.

[0003] To ensure excellent performance of the coil, the dry-type transformer coil after casting should have a smooth appearance and excellent insulation properties.

[0004] Traditional dry-type transformer coil casting molds have a simple structure. In traditional casting processes, the surface of the cast coil may have burrs or unevenness, requiring grinding. Grinding requires additional labor or equipment investment, extending the production cycle. Furthermore, grinding carries the risk of damaging the coil surface, increasing the rework or scrap rate. Moreover, the dust generated during grinding can also have an adverse effect on the health of workers. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a dry-type transformer coil casting mold that does not require grinding.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A dry-type transformer coil casting mold without grinding includes an operating table and a mold body. The operating table has a closed door on its front and an exhaust structure. The exhaust structure includes a fixed bracket on the top of the operating table with a fixed mounting device. An electric cylinder is fixedly mounted on the fixed bracket, and an annular pressure plate is mounted on the output end of the electric cylinder. A through groove is formed on the mold body, and a clamping plate is installed inside the through groove. The clamping plate has multiple mounting holes, and a first spring is set inside each mounting hole. A clamping ball is fixedly mounted on one end of the first spring. The mold body has multiple clamping holes that cooperate with the clamping ball. Multiple nanometer-sized exhaust holes are formed on one side of the mold body.

[0008] Furthermore, a fixing block is fixedly installed at the output end of the electric cylinder, and a fixing frame connected to the fixing block is fixedly installed on the mold body. Both the fixing block and the fixing frame have connection holes, and a first insert rod is movably installed inside the connection hole. A latch is fixedly installed at one end of the first insert rod.

[0009] Furthermore, the operating table is equipped with an electric telescopic rod, and a baffle is fixedly installed at the output end of the electric telescopic rod. The mold body is provided with a material discharge hole that is adapted to the baffle. A placement frame connected to the operating table is provided below the mold body, and a collection box is provided inside the placement frame.

[0010] Furthermore, the placement frame is provided with multiple sliding grooves, and a sliding rod connected to the collection box is movably installed inside the sliding groove.

[0011] Furthermore, a second insert rod connected to the slide rod is movably mounted on the placement frame, and a second spring connected to the placement frame is provided on the second insert rod.

[0012] Furthermore, multiple fixing sleeves are fixedly installed at the bottom of the operating platform, and shock absorbers are provided inside the fixing sleeves. Support legs are fixedly installed at the bottom of the shock absorbers.

[0013] Furthermore, a limit block is fixedly installed at one end of the closed door, and a limit frame that cooperates with the limit block is fixedly installed on the operating table.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Compared to the traditional dry-type transformer coil casting mold that requires grinding after casting, this utility model, through the setting of the venting structure, can pre-treat burrs or unevenness before cooling after casting to maintain the smoothness of the coil appearance. This eliminates the need for additional labor or equipment investment, helps to shorten the production cycle, avoids surface damage to the coil caused by grinding, reduces material waste, and further avoids the harm to personnel caused by grinding dust. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the card plate structure of this utility model;

[0018] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 For the present utility model Figure 2 Enlarged view at point B in the middle;

[0020] Figure 5 This is a schematic diagram of the baffle structure of this utility model;

[0021] Figure 6For the present utility model Figure 5 Enlarged view at point C;

[0022] Figure 7 For the present utility model Figure 5 Enlarged view of point D in the middle.

[0023] In the diagram, 1. Operating table; 2. Mold body; 3. Enclosed door; 4. Exhaust structure; 5. Fixing frame; 6. Electric cylinder; 7. Annular pressure plate; 8. Through groove; 9. Clamping plate; 10. Mounting hole; 11. First spring; 12. Clamping ball; 13. Clamping hole; 14. Exhaust hole; 15. Fixing block; 16. Fixing frame; 17. Connecting hole; 18. First insertion rod; 19. Clamping bolt; 20. Electric telescopic rod; 21. Baffle; 22. Material drop hole; 23. Placement frame; 24. Collection box; 25. Slide groove; 26. Slide rod; 27. Second insertion rod; 28. Second spring; 29. ​​Fixing sleeve; 30. Shock absorber; 31. Support leg; 32. Limiting block; 33. Limiting frame. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figures 1-7 As shown, a dry-type transformer coil grinding-free casting mold includes an operating table 1 and a mold body 2. The operating table 1 has a closed door 3 installed on its front side and an exhaust structure 4. The exhaust structure 4 includes a fixed mounting bracket 5 on the top of the operating table 1. An electric cylinder 6 is fixedly installed on the fixed bracket 5. An annular pressure plate 7 is installed at the output end of the electric cylinder 6. A through groove 8 is opened on the mold body 2. A clamping plate 9 is installed inside the through groove 8. Multiple mounting holes 10 are opened on the clamping plate 9. A first spring 11 is installed inside the mounting hole 10. A clamping ball 12 is fixedly installed at one end of the first spring 11. Multiple clamping holes 13 are opened on the mold body 2 to cooperate with the clamping ball 12. Multiple nano-scale exhaust holes 14 are opened on one side of the mold body 2.

[0026] like Figure 4As shown, a fixing block 15 is fixedly installed at the output end of the electric cylinder 6, and a fixing frame 16 connected to the fixing block 15 is fixedly installed on the mold body 2. Both the fixing block 15 and the fixing frame 16 have connection holes 17. A first insert rod 18 is movably installed inside the connection hole 17, and a latch 19 is fixedly installed at one end of the first insert rod 18. After inserting the first insert rod 18 into the connection hole 17 to connect the connection hole 17 and the fixing frame 16, rotating the first insert rod 18 so that the angle of the latch 19 is perpendicular to the angle of the connection hole 17 can fix the connection hole 17 inside the fixing frame 16, thereby installing the annular pressure plate 7 on the electric cylinder 6. Reversely rotating the first insert rod 18 so that the angle of the latch 19 is consistent with the angle of the connection hole 17 can pull out the first insert rod 18, making it convenient to disassemble and replace the annular pressure plate 7.

[0027] like Figure 5 As shown, the operating table 1 is equipped with an electric telescopic rod 20, and a baffle 21 is fixedly installed at the output end of the electric telescopic rod 20. The mold body 2 is provided with a material discharge hole 22 that is compatible with the baffle 21. A placement frame 23 connected to the operating table 1 is provided below the mold body 2, and a collection box 24 is provided inside the placement frame 23. After the poured material cools and forms a finished product, the electric telescopic rod 20 is activated to retract and drive the baffle 21 to move away from the bottom of the mold body 2. The formed coil can then fall into the collection box 24 through the material discharge hole 22 for unified collection. The collection box 24 can be pulled out and the coil can be removed by opening the sealing door 3.

[0028] like Figure 6 As shown, the placement frame 23 has multiple sliding grooves 25, and a sliding rod 26 connected to the collection box 24 is movably installed inside the sliding groove 25. The sliding grooves 25 and the sliding rod 26 can reduce the friction between the placement frame 23 and the collection box 24, reduce the wear between the placement frame 23 and the collection box 24, and facilitate pushing and pulling the collection box 24.

[0029] like Figure 6 As shown, a second insert rod 27 connected to the slide rod 26 is movably installed on the placement frame 23. A second spring 28 connected to the placement frame 23 is provided on the second insert rod 27. The second insert rod 27 can be engaged inside the slide rod 26 under the elastic action of the second spring 28 to limit the slide rod 26 and improve the stability of the slide rod 26 inside the slide groove 25.

[0030] like Figure 7As shown, multiple fixed sleeves 29 are fixedly installed at the bottom of the operating platform 1. Shock absorbers 30 are installed inside the fixed sleeves 29, and support legs 31 are fixedly installed at the bottom of the shock absorbers 30. When resin is poured into the mold body 2, the operating platform 1 will be subjected to a certain pressure. The support legs 31 press against the shock absorbers 30 inside the fixed sleeves 29. The shock absorbers 30 buffer this pressure to prevent the operating platform 1 from shaking and affecting the cast product.

[0031] like Figure 2 As shown, a limit block 32 is fixedly installed at one end of the closed door 3, and a limit frame 33 that works in conjunction with the limit block 32 is fixedly installed on the operating table 1. When the closed door 3 is closed on the operating table 1, the limit block 32 can be locked between the limit frame 33 to limit the closed door 3. The closed door 3 can be opened by pulling the handle on the closed door 3.

[0032] like Figures 1-7 As shown, the working process of the dry-type transformer coil grinding-free casting mold provided in this embodiment is as follows:

[0033] First, after the casting material is poured into the mold body 2, the clamping plate 9 is pulled off. Then, the electric cylinder 6 is activated, which drives the annular pressure plate 7 to descend into the mold body 2 and fit tightly against its inner wall. This compresses the air inside the mold body 2 and forces the dissolved gas and tiny air bubbles in the resin out through multiple nano-scale venting holes 14 on the mold body 2, preventing voids from forming after curing. This also compresses the resin inside the mold body 2, making surface imperfections smooth. After the air is expelled, when the clamping plate 9 is aligned with the through slot 8 and inserted, the clamping ball 12 is compressed and shrinks into the mounting hole 10. When the clamping ball 12 moves to the position of the clamping hole 13, it pops out under the elastic action of the first spring 11 and engages inside the clamping hole 13, fixing the clamping plate 9 to the mold body 2 and sealing the nano-scale venting holes 14. After this operation, the quality of the coil casting is greatly improved, eliminating the need for further polishing.

[0034] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein. Any modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A dry-type transformer coil casting mold without grinding, comprising an operating table (1) and a mold body (2), wherein a closed door (3) is installed on the front of the operating table (1), characterized in that: The operating table (1) is provided with an exhaust structure (4), which includes a fixed bracket (5) for fixing the top of the operating table (1). An electric cylinder (6) is fixedly installed on the fixed bracket (5). An annular pressure plate (7) is installed at the output end of the electric cylinder (6). A through groove (8) is provided on the mold body (2). A clamping plate (9) is installed inside the through groove (8). A plurality of mounting holes (10) are provided on the clamping plate (9). A first spring (11) is provided inside the mounting hole (10). A clamping ball (12) is fixedly installed at one end of the first spring (11). A plurality of clamping holes (13) are provided on the mold body (2) to cooperate with the clamping ball (12). A plurality of exhaust holes (14) are provided on one side of the mold body (2).

2. The dry-type transformer coil grinding-free casting mold according to claim 1, characterized in that: A fixing block (15) is fixedly installed at the output end of the electric cylinder (6). A fixing frame (16) connected to the fixing block (15) is fixedly installed on the mold body (2). Both the fixing block (15) and the fixing frame (16) are provided with connecting holes (17). A first insert rod (18) is movably installed inside the connecting hole (17). A latch (19) is fixedly installed at one end of the first insert rod (18).

3. The dry-type transformer coil grinding-free casting mold according to claim 1, characterized in that: An electric telescopic rod (20) is provided inside the operating table (1). A baffle (21) is fixedly installed at the output end of the electric telescopic rod (20). A material dropping hole (22) adapted to the baffle (21) is provided on the mold body (2). A placement frame (23) connected to the operating table (1) is provided below the mold body (2). A collection box (24) is provided inside the placement frame (23).

4. The dry-type transformer coil casting mold without grinding according to claim 3, characterized in that: The placement frame (23) is provided with multiple sliding grooves (25), and a sliding rod (26) connected to the collection box (24) is movably installed inside the sliding groove (25).

5. The dry-type transformer coil casting mold without grinding according to claim 4, characterized in that: A second insert rod (27) connected to the slide rod (26) is movably mounted on the placement frame (23), and a second spring (28) connected to the placement frame (23) is provided on the second insert rod (27).

6. The dry-type transformer coil grinding-free casting mold according to claim 1, characterized in that: The bottom of the operating table (1) is fixedly equipped with multiple fixed sleeves (29), and the inside of the fixed sleeves (29) is provided with shock absorbers (30), and the bottom of the shock absorbers (30) is fixedly equipped with support legs (31).

7. The dry-type transformer coil casting mold without grinding according to claim 1, characterized in that: A limit block (32) is fixedly installed at one end of the closed door (3), and a limit frame (33) that works in conjunction with the limit block (32) is fixedly installed on the operating table (1).

8. The dry-type transformer coil casting mold without grinding according to claim 1, characterized in that: The exhaust port (14) is a nanoscale exhaust port.

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