Wire outlet table mold capable of increasing creepage distance

Abstract

The utility model belongs to the field of transformers, and particularly relates to a wire outlet table mold capable of increasing the creepage distance. A coil casting body mold cavity structure is arranged at one end of an outlet terminal boss mold cavity structure, and an outlet table hole is formed in the end face of the other end of the outlet terminal boss mold cavity structure; an umbrella skirt pouring cavity structure is arranged in the outlet terminal boss mold cavity structure; a cavity of the outlet terminal boss mold cavity structure is connected with a cavity of the coil casting body mold cavity structure through a central column cavity; and clamping plates are arranged on the outer walls of the coil casting body mold cavity structure and the outgoing line terminal boss mold cavity structure. The mold ensures that the creepage distance between the two outgoing terminals and the creepage distance to the ground of the outgoing terminals meet the required values of relevant national standards under the condition that the poured outgoing platform meets a smaller air insulation distance, and the product quality and safety are improved.

Description

Technical Field

[0001] This invention belongs to the field of transformers, and specifically relates to a lead-out platform mold that increases the creepage distance. Background Technology

[0002] The transformer's output terminal is an important component of the transformer, primarily used to connect the transformer's internal windings to external power lines. Its core function is to safely and stably transmit the electrical energy generated or converted by the transformer to the external power grid or electrical equipment.

[0003] Currently, the transformer market demands miniaturized products. While meeting product performance requirements, miniaturized products can save cabinet space and procurement costs. However, when the product's shape has size limitations and the outgoing terminals are designed on the same side of the coil, the outgoing terminals cast by existing molds cannot meet the minimum air insulation distance requirements. This results in poor quality, safety issues, and an inability to guarantee that the creepage distance between the two outgoing terminals and the creepage distance between the outgoing terminals and the ground meet the requirements of relevant national standards. Summary of the Invention

[0004] This invention addresses the problems of existing lead-out platform molds failing to meet minimum air insulation distance requirements, resulting in low quality, safety issues, and inability to guarantee creepage distances between two lead-out terminals and between the lead-out terminals and ground, thus failing to meet relevant national standards. The invention proposes a lead-out platform mold with increased creepage distance, comprising a lead-out terminal boss mold cavity structure for casting the lead-out terminal boss, a coil casting body mold cavity structure for casting the coil casting body located at one end of the lead-out terminal boss mold cavity structure, and a lead-out platform hole for mounting a lead-out insert on the other end face of the lead-out platform. The cavity structure of the terminal boss mold has a casting cavity structure for casting the terminal boss skirt; the cavity structure of the terminal boss mold and the cavity structure of the coil casting body mold are both symmetrical parts that are interlocked to form the terminal boss mold cavity; the cavity of the terminal boss mold structure and the cavity structure of the coil casting body mold are connected by a central column cavity; clamping plates are provided on the outer walls of the coil casting body mold cavity structure and the terminal boss mold cavity structure; clamping holes are provided on the clamping plates; clamping bolts for clamping the terminal boss mold cavity structure and the coil casting body mold cavity structure are provided in the clamping holes.

[0005] According to the above-described mold for increasing the creepage distance, the cavity structure of the mold for the lead-out terminal boss is a hollow cylindrical structure; the cavity structure of the mold for the lead-out terminal boss is welded to the cavity structure of the mold for the coil casting body.

[0006] According to the above-described lead-out platform mold for increasing the creepage distance, an arc structure is provided at the central column cavity between the cavity of the coil casting body mold cavity structure and the cavity of the coil casting body mold cavity structure.

[0007] According to the above-described lead-out platform mold for increasing creep distance, the cavity structure of the coil casting body mold is a rectangular structure with a circular hole of the same outer diameter as the cavity structure of the lead-out terminal boss mold on one side wall; one side wall of the cavity structure of the lead-out terminal boss mold is welded to the circular hole in the cavity structure of the coil casting body mold.

[0008] According to the above-described lead-out platform mold for increasing creep distance, the clamping plate is a four-cubic-pole structure; one end of the clamping plate is welded to the side wall of the coil casting body mold cavity structure, and one side wall of the clamping plate is welded to the coil casting body mold cavity structure; the four cuboid clamping plates are fastened together in pairs to clamp the interlocking coil casting body mold cavity structure and the interlocking lead-out terminal boss mold cavity structure.

[0009] According to the above-described lead-out platform mold for increasing creep distance, the umbrella skirt casting structure set in the cavity structure of the lead-out terminal boss mold has an umbrella skirt central column cavity; the diameter of the central column cavity between the cavity of the coil casting body mold cavity structure and the cavity of the coil casting body mold cavity structure is larger than the diameter of the umbrella skirt central column cavity.

[0010] According to the above-described mold for increasing the creepage distance of a line outlet, there are 2-8 clamping bolts on the clamping plate.

[0011] According to the above-described mold for increasing the creepage distance of the lead-out platform, a positioning pin structure is provided on the interlocking side walls of the cavity structures of the two interlocking coil casting molds.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The mold of the present invention increases the height of the lead-out terminal boss. The mold cavity structure of the lead-out terminal boss is provided with a casting cavity structure for casting the lead-out terminal boss skirt. The other end face of the mold cavity structure of the lead-out terminal boss is provided with a lead-out platform hole for installing the lead-out platform insert. The lead-out platform is integrally cast with the coil casting body, which increases the creepage distance of the cast lead-out platform. When the shape of the lead-out platform is limited and the lead-out terminal is designed on the same side of the coil, while meeting the requirement of a smaller air insulation distance, the lead-out platform cast by the present invention can ensure that the creepage distance between the two lead-out terminals and the creepage distance of the lead-out terminal to ground meet the requirements of relevant national standards, thus improving safety.

[0014] 2. This invention employs an arc-shaped structure at the central column cavity between the cavities of the coil casting mold cavity structure and the cavities of the coil casting mold cavity structure. This reduces local stress concentration and prevents cracking at the joint of the lead-out platform after casting and curing or during use. This improves the quality of the lead-out platform.

[0015] 3. The diameter of the central column cavity between the cavity of the coil casting body mold cavity structure and the cavity of the coil casting body mold cavity structure of the present invention is larger than the diameter of the central column cavity of the umbrella skirt, which increases the mechanical strength of the casting platform of the present invention and further improves the quality and safety of the casting platform.

[0016] 4. The cavity structure of the lead terminal boss mold and the cavity structure of the coil casting body mold of the present invention are both symmetrical two parts that are fastened together to form the lead platform mold cavity. This structure makes the present invention easier to operate when assembling and disassembling the mold, improves work efficiency, and the appearance of the cast lead platform is flatter.

[0017] 5. The interlocking side walls of the interlocking coil casting body mold cavity structure of the present invention are provided with positioning pin structures to prevent misalignment of the coil casting body mold after mold assembly, which would cause casting defects and affect the appearance and performance of the cast coil casting platform. Attached Figure Description

[0018] Figure 1 This is a front view of a line-out platform mold for increasing the crawl distance according to the present invention.

[0019] Figure 2 This is a left view of a line-out platform mold for increasing the crawl distance according to the present invention.

[0020] In the diagram: 1-Cavity structure of the lead-out terminal boss mold, 2-Clamping plate, 3-Coil casting body, 4-Lead-out insert, 5-Cavity structure of the coil casting body mold, 6-Arc structure, 7-Center column cavity, 8-Coil lead-out, 9-Lead-out platform hole, 11-Umbrella skirt casting cavity structure, 21-Clamping hole, 22-Clamping bolt. Detailed Implementation

[0021] Preferred Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] like Figure 1 and Figure 2As shown: In this embodiment, a lead-out platform mold for increasing the creepage distance includes a lead-out terminal boss mold cavity structure 1 for casting lead-out terminal bosses, a coil casting body mold cavity structure 5 for casting coil casting bodies 3 disposed at one end of the lead-out terminal boss mold cavity structure 1; a lead-out platform hole 9 for installing lead-out inserts 4 is provided on the end face of the other end of the lead-out terminal boss mold cavity structure 1; a skirt casting cavity structure 11 for casting lead-out terminal boss skirts is provided inside the lead-out terminal boss mold cavity structure 1; the lead-out terminal boss mold... The cavity structure 1 and the cavity structure 5 of the coil casting body mold are both symmetrically formed by two interlocking parts to form the cavity of the lead-out platform mold; the cavity of the lead-out terminal boss mold cavity structure 1 and the cavity of the coil casting body mold cavity structure 5 are connected by a central column cavity 7; a clamping plate 2 is provided on the outer wall of the coil casting body mold cavity structure 5 and the lead-out terminal boss mold cavity structure 1; a clamping hole 21 is provided on the clamping plate 2; a clamping bolt 22 for clamping the lead-out terminal boss mold cavity structure 1 and the coil casting body mold cavity structure 5 is provided in the clamping hole 21.

[0024] The cavity structure 1 of the lead terminal boss mold is a hollow cylindrical structure; the cavity structure 1 of the lead terminal boss mold is welded to the cavity structure 5 of the coil casting body mold.

[0025] An arc structure 6 is provided at the central column cavity 7 between the cavity of the coil casting body mold cavity structure 5 and the cavity of the coil casting body mold cavity structure 5.

[0026] The coil casting body mold cavity structure 5 is a rectangular structure with a circular hole of the same outer diameter as the lead terminal boss mold cavity structure 1 located at the center of one side wall; one side wall of the lead terminal boss mold cavity structure 1 is welded to the circular hole in the coil casting body mold cavity structure 5.

[0027] The clamping plate 2 is a four-cubic-pole structure; one end of the clamping plate 2 is welded to the side wall of the coil casting body mold cavity structure 5, and one side wall of the clamping plate 2 is welded to the coil casting body mold cavity structure 5; the four cuboid clamping plates 2 are fastened together in pairs to clamp the interlocking coil casting body mold cavity structure 5 and the interlocking lead-out terminal boss mold cavity structure 1.

[0028] The umbrella skirt casting structure 11 set inside the cavity structure 1 of the lead terminal boss mold has an umbrella skirt center column cavity; the diameter of the center column cavity 7 between the cavity of the coil casting body mold cavity structure 5 and the cavity of the coil casting body mold cavity structure 5 is larger than the diameter of the umbrella skirt center column cavity.

[0029] There are 2-8 clamping bolts 22 on the clamping plate 2. The two interlocking coil casting mold cavity structures 5 are provided with positioning pin structures on their interlocking side walls.

[0030] This embodiment provides a lead-out platform mold with increased creepage distance. The height of the resin lead-out terminal boss cast in the cavity structure 1 of the lead-out terminal boss mold is increased. A skirt casting cavity structure 11 for casting the lead-out terminal boss skirt is provided within the lead-out terminal boss mold cavity structure 1. The lead-out insert 4 is cast on one end face of the lead-out terminal boss mold cavity structure 1. The lead-out terminal boss and the coil casting body 3 are integrally cast. To prevent cracking between the lead-out terminal boss and the coil casting body 3 after casting and curing or during use, an arc structure 6 is provided at the central pillar cavity 7 between the cavity of the coil casting body mold cavity structure 1 and the cavity of the coil casting body mold cavity structure 5 to reduce local stress concentration. The diameter of the central pillar cavity 7 between the cavity of the lead-out terminal boss mold cavity structure 1 and the cavity of the coil casting body mold cavity structure 5 is larger than the diameter of the skirt central pillar cavity to increase the mechanical strength of the lead-out platform.

[0031] In this embodiment, a lead-out platform mold with increased creep distance is provided. The lead-out terminal boss mold cavity structure 1 and the coil casting body mold cavity structure 5 are both symmetrical two parts that are interlocked to form the lead-out platform mold cavity. This makes it easier to operate when assembling and disassembling the lead-out platform mold, improves work efficiency, and makes the lead-out terminal boss and coil casting body 3 have a smoother appearance.

[0032] The left and right halves of the processed terminal boss mold cavity structure are welded to the corresponding coil casting body mold cavity structure 5. Clamping holes are drilled on the clamping plate 2. One end of the clamping plate 2 is on the side wall of the terminal boss mold cavity structure 1, and the other side wall of the clamping plate 2 is welded to the coil casting body mold cavity structure 5. The four cuboid clamping plates are fastened together to clamp the interlocking coil casting body mold cavity structure 5 and the interlocking terminal boss mold cavity structure 1.

[0033] After casting is completed, the coil lead 8 is welded to the lead insert 4, and then bolts are screwed onto the lead insert 4 through the lead platform hole 9. After tightening, the lead insert 4 can be fixed on the lead terminal boss.

[0034] In addition, a positioning pin structure is provided on the interlocking side walls of the two interlocking coil casting body mold cavity structures 5. This can prevent misalignment of the lead terminal boss mold cavity structure 1 and the coil casting body mold cavity structure 5 after mold assembly, which would cause casting defects and affect the appearance and performance of the lead terminal.

[0035] In this embodiment, the lead-out terminal boss mold cavity structure 1 of the lead-out platform mold for increasing the creep distance consists of two parts, both of which are connected to the coil casting body mold cavity structure 5 on the same side.

[0036] The mold of this invention ensures that the cast-out platform meets the requirements of relevant national standards for creepage distance between the two outgoing terminals and creepage distance between the outgoing terminals and ground while maintaining a smaller air insulation distance, thereby improving product quality and safety.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A riser block mold for increasing the creepage distance, characterized by: The out terminal boss mold cavity structure (1) is hollow cylindrical structure; the out terminal boss mold cavity structure (1) and the coil pouring body mold cavity structure (5) are welded connection.

2. A riser block mold for increasing the reach of a wire, according to claim 1, characterized in that: The out terminal boss mold cavity structure (1) is hollow cylindrical structure; the out terminal boss mold cavity structure (1) and the coil pouring body mold cavity structure (5) are welded connection.

3. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The cavity of the coil pouring body mold cavity structure (5) and the cavity of the coil pouring body mold cavity structure (5) are provided with arc structure (6) at the center column cavity (7) between them.

4. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The coil pouring body mold cavity structure (5) is a rectangular structure with a circular hole in the center of one side wall, which has the same outer diameter as the out terminal boss mold cavity structure (1); the side wall of one end of the out terminal boss mold cavity structure (1) is welded in the circular hole of the coil pouring body mold cavity structure (5).

5. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The clamping plate (2) is four cuboid structures; one end of the clamping plate (2) is welded on the side wall of the coil pouring body mold cavity structure (5), and one side wall of the clamping plate (2) is welded on the coil pouring body mold cavity structure (5); the four cuboid structures of the clamping plate (2) are buckled to clamp the mutually buckled coil pouring body mold cavity structure (5) and the mutually buckled out terminal boss mold cavity structure (1).

6. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The umbrella skirt pouring structure (11) provided in the out terminal boss mold cavity structure (1) is provided with an umbrella skirt center column cavity; the diameter of the center column cavity (7) between the cavity of the coil pouring body mold cavity structure (5) and the cavity of the coil pouring body mold cavity structure (5) is greater than the diameter of the umbrella skirt center column cavity.

7. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The clamping bolt (22) on the clamping plate (2) has 2-8.

8. A riser block mold for increasing the reach of a wire, according to claim 1, wherein: The mutually buckled two coil pouring body mold cavity structures (5) are provided with positioning pin structures on the mutually buckled side walls.

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