Casting mold shell for high-voltage coil of transformer

Abstract

The utility model discloses a transformer high-voltage coil pouring mould shell, which comprises a mould front panel, a mould outer wall and a mould bottom plate, the mould front panel comprises a mould wiring panel and a mould general heightening pad, the mould outer wall is of a cylindrical shell structure, the mould outer wall is fixedly connected with the mould bottom plate, and the mould outer wall is perpendicular to the mould bottom plate. A front panel sliding groove is formed in the side face, perpendicular to the mold bottom plate, of the mold outer wall, and the mold front panel slides into the front panel sliding groove to be tightly connected with the mold outer wall. The front panel comprises the mold wiring panel and the mold universal heightening pad, and the mold front panel is subjected to detachable modular design, so that the mold universal heightening pad can be added according to different high-voltage coil heights, the mold front panel can adapt to transformer high-voltage coils with different heights, and the mold front panel can be universal.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer coil casting molds, in particular to a transformer high-voltage coil casting mold shell. Background Art

[0002] A dry-type transformer is one whose core and windings are not immersed in insulating oil. Dry-type transformers are widely used in a variety of electrical applications. Some dry-type transformers consist of a core made of silicon steel sheets and coils cast in epoxy or other resins, with the epoxy or other resin serving as the primary insulation.

[0003] The safe operation and service life of dry-type transformers depend largely on the safety and reliability of the transformer high-voltage coil insulation. Casting the transformer high-voltage coil requires the use of a casting mold shell.

[0004] Currently, the front panel of the casting mold shell is set according to the high-voltage coil height. This will result in the need to redesign a high-voltage coil front panel for coils of different heights, resulting in the high-voltage coil front panels of different heights not being universal, resulting in a large number of high-voltage coil front panels in stock and a waste of resources. Utility Model Content

[0005] The purpose of the utility model is to provide a transformer high-voltage coil casting mold shell, including a mold front panel, a mold outer wall and a mold bottom plate, the mold front panel includes a mold wiring panel and a mold universal heightening pad, the mold outer wall is a cylindrical shell structure, the mold outer wall and the mold bottom plate are fixedly connected, and the mold outer wall and the mold bottom plate are in a vertical relationship.

[0006] A front panel sliding groove is provided on the side surface of the outer wall of the mold which is perpendicular to the mold bottom plate. The front panel of the mold slides into the front panel sliding groove and is tightly connected with the outer wall of the mold.

[0007] The mold wiring panel includes the front panel upper wiring terminals, the front panel branch wiring terminals and the front panel lower wiring terminals.

[0008] The wiring terminal on the front panel is a single wiring terminal, which is arranged on the upper part of the mold wiring panel.

[0009] The lower wiring terminal of the front panel is a single wiring terminal, which is arranged at the lower part of the mold wiring panel.

[0010] The front panel tapping terminal block includes a plurality of terminal blocks and is arranged in the middle of the mold wiring panel.

[0011] The universal height-raising pad for the mold is arranged in the slide groove of the front panel, and a plurality of universal height-raising pads for the mold are arranged between the mold wiring panel and the mold bottom plate.

[0012] Furthermore, a universal heightening pad for the mold is provided above one end of the mold wiring panel close to the wiring terminals on the front panel.

[0013] Furthermore, screw holes are provided at both ends of the mold wiring panel that is not connected to the front panel slide groove, and screw holes are provided at both ends of the mold universal heightening pad that is not connected to the front panel slide groove. Bolts are passed through the screw holes, and the mold wiring panel and the mold universal heightening pad are fixedly connected by bolts.

[0014] Furthermore, screw holes are also provided on the mold base plate. The screw holes on the mold base plate are provided below the front panel slide groove. The mold wiring panel or the mold universal heightening pad is fixedly connected to the mold base plate by bolts.

[0015] Furthermore, a mold inner wall is provided in the inner cavity of the mold outer wall. The mold inner wall is a shell structure with openings at both ends. The mold inner wall is fixedly connected to the mold bottom plate, and the mold inner wall and the mold bottom plate are in a vertical relationship.

[0016] Furthermore, an internal pressure frame assembly is provided on the side of the mold inner wall opposite to the upper mold bottom plate. The internal pressure frame assembly includes a plurality of internal pressure frame support parts and internal pressure frame pressing parts. The internal pressure frame support part is long and strip-shaped, and the internal pressure frame support part is vertical to the mold bottom plate. One end of the internal pressure frame support part is fixedly connected to the mold bottom plate, and the other end of the internal pressure frame support part is fixedly connected to the internal pressure frame pressing part. The internal pressure frame pressing part is a cross with four pressing arms, and one pressing arm of the internal pressure frame pressing part is pressed at the opening of the mold inner wall.

[0017] Furthermore, a pressing strip is provided on the pressing portion of the inner press frame, and the pressing strip extends above the front panel slide groove, and is used to press the front panel of the mold that it contacts.

[0018] Furthermore, the mold front panel also includes a panel gasket, which is arranged between the mold wiring panel and the mold universal heightening pad or between two mold universal heightening pads. The panel gasket is used to enhance the sealing between the mold wiring panel and the mold universal heightening pad, as well as the sealing between the two mold universal heightening pads.

[0019] The beneficial effect of the transformer high-voltage coil casting mold shell provided by the utility model is that: compared with the existing technology, the mold front panel includes a mold wiring panel and a mold universal height-raising pad, and the mold front panel is designed to be detachable and modular, so that the mold universal height-raising pad can be added according to different high-voltage coil heights, so that the mold front panel can adapt to transformer high-voltage coils of different heights, thereby making the mold front panel universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall schematic diagram of the casting mold shell for the transformer high-voltage coil;

[0021] Figure 2 The outer shell of the casting mold for the transformer high-voltage coil is a schematic diagram of the installation of the mold front panel. DETAILED DESCRIPTION

[0022] In order to better understand the purpose, structure and function of this utility model, Figures 1 to 2 , a transformer high voltage coil casting mold shell of the utility model is further described in detail.

[0023] like Figure 1 and Figure 2 As shown, a transformer high-voltage coil casting mold shell according to an embodiment of the present invention includes a mold front panel, a mold outer wall 200, a mold inner wall 300 and a mold bottom plate 400, wherein the mold outer wall 200 is a cylindrical shell structure, one side of which is fixedly connected to the mold bottom plate 400, and the other side is an open structure, and the mold outer wall 200 and the mold bottom plate 400 are in a vertical relationship. A front panel slide 210 is provided on the side of the mold outer wall 200 perpendicular to the mold bottom plate 400, and the front panel slide 210 is tightly connected to the mold front panel that slides in. A mold inner wall 300 is also provided in the internal cavity of the mold outer wall 200, and the mold inner wall 300 is a shell structure. One side of the mold inner wall 300 is also fixedly connected to the mold bottom plate 400, and the other side of the mold inner wall 300 is also an open structure.

[0024] The mold front panel includes a mold wiring panel 100 and a universal mold heightening pad 110. The mold wiring panel 100 primarily provides wiring terminals for the transformer's high-voltage coil. The wiring terminals on the mold wiring panel 100 include the front panel terminal 101, the front panel tap terminal 102, and the front panel lower terminal 103. Both the front panel terminal 101 and the front panel lower terminal 103 contain only one terminal and are maintained at a safe distance from the front panel tap terminal 102. The front panel tap terminal 102 includes several terminals, sufficient for wiring most transformer high-voltage coils. On the mold wiring panel 100, the front panel lower terminal 103 is closest to the mold base 400. Above the front panel lower terminal 103 is the front panel tap terminal 102. Above the front panel tap terminal 102 is the front panel terminal 101. The front panel terminal 101 is furthest from the mold base 400. The end of the mold connection panel 100 close to the lower connection terminal 103 of the front panel is the lower end of the mold connection panel 100, and the end close to the tap connection terminal 102 of the front panel is the upper end of the mold connection panel 100.

[0025] In the present invention, before pressing the high-voltage coil of the transformer into the outer wall 200 and the inner wall 300 of the mold, the mold wiring panel 100 is first slid into the front panel slide groove 210. If the height of the pressed high-voltage coil of the transformer is low, it is no longer necessary to slide the universal mold heightening pad 110 into the upper and / or lower end of the mold wiring panel 100. After the high-voltage coil of the transformer is completely pressed in, the high-voltage coil of the transformer can be cast.

[0026] When the high-voltage coil of the transformer is pressed into the outer wall 200 and the inner wall 300 of the mold, it is found that the height of the mold wiring panel 100 can no longer meet the height required by the current high-voltage coil of the transformer, then a number of universal mold heightening pads 110 can be slid into the upper and / or lower ends of the mold wiring panel 100 to increase the height of the entire mold front panel so that the mold front panel can match the height of the high-voltage coil of the transformer.

[0027] The height of the universal mold heightening pad 110 can be designed based on the current mold height minus the mold front panel's dimension, divided into several equal parts. For example, the height can be between 100 mm and 250 mm. The universal mold heightening pad 110 has the same width as the mold wiring panel 100, meaning it can slide into the front panel's chute 210. To prevent epoxy resin or other resin from leaking during casting, the width of the universal mold heightening pad 110 and the mold wiring panel 100 must ensure a tight connection with the front panel's chute 210.

[0028] In order to increase the tightness of the inside of the mold front panel, screw holes are opened at the upper and lower ends of the mold wiring panel 100, and screw holes are also opened at the top and bottom ends of the raising pad 110. After adding the universal raising pad 110, the mold wiring panel 100 and the mold universal raising pad 110 can be tightly fixed together by installing bolts, and the installing bolts can also tightly fix the two mold universal raising pads 110 together. Not only that, a panel gasket 120 is installed between the mold wiring panel 100 and the mold universal heightening pad 110 and / or between the two mold universal heightening pads 110. The panel gasket 120 is made of a flexible material (such as rubber). The panel gasket 120 can further fill the gap between the mold wiring panel 100 and the mold universal heightening pad 110 and / or between the two mold universal heightening pads 110. Therefore, the panel gasket 120 can enhance the sealing between the mold wiring panel 100 and the mold universal heightening pad 110, as well as the sealing between the two mold universal heightening pads 110, further improving the sealing inside the mold front panel.

[0029] It can be understood that screw holes are also provided on the mold base plate 400 at the front panel slide groove 210. The screw holes can fix the mold front panel and the mold base plate 400 with bolts, thereby increasing the tightness between the mold front panel and the mold base plate 400 and reducing the leakage of epoxy resin or other resins during pouring.

[0030] An internal press frame assembly is also provided inside the mold inner wall 300. The internal press frame assembly includes a plurality of support portions 510 and an internal press frame pressing portion 520. The internal press frame support portion 510 is in an elongated strip shape. The internal press frame support portion 510 is perpendicular to the mold base plate 400. One end of the internal press frame support portion 510 contacts the mold base plate 400, while the other end of the internal press frame support portion 510 contacts the internal press frame pressing portion 520. The internal press frame pressing portion 520 is connected to the mold base plate 400 by bolts, so that the internal press frame pressing portion 520 can press the mold inner wall 300. The internal press frame pressing portion 520 is a cross-shaped structure with four pressing arms, one of which is pressed against an opening in the mold inner wall 300. A pressing strip 530 is further provided on the pressing portion 520 of the inner press frame. One end of the pressing strip 530 extends above the front panel slide groove 210 so that the pressing strip 530 can press the mold front panel it contacts.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A transformer high voltage coil casting mold shell, characterized in that: The mold comprises a mold front panel, a mold outer wall (200) and a mold bottom plate (400), wherein the mold front panel comprises a mold wiring panel (100) and a mold universal heightening pad (110), the mold outer wall (200) is a cylindrical shell structure, the mold outer wall (200) and the mold bottom plate (400) are fixedly connected, and the mold outer wall (200) and the mold bottom plate (400) are in a vertical relationship; A front panel sliding groove (210) is provided on the side of the mold outer wall (200) perpendicular to the mold bottom plate (400), and the mold front panel slides into the front panel sliding groove (210) and is tightly connected to the mold outer wall (200); The mold wiring panel (100) comprises a front panel upper wiring terminal (101), a front panel tapping wiring terminal (102) and a front panel lower wiring terminal (103); The connection terminal (101) on the front panel is a single connection terminal, which is arranged on the upper part of the mold connection panel (100); The front panel lower wiring terminal (103) is a single wiring terminal, which is arranged at the lower part of the mold wiring panel (100); The front panel tapping terminal (102) comprises a plurality of terminal blocks, which are arranged in the middle of the mold wiring panel (100); The universal mold heightening pad (110) is arranged in the front panel sliding groove (210), and a plurality of universal mold heightening pads (110) are arranged between the mold wiring panel (100) and the mold bottom plate (400).

2. The transformer high voltage coil casting mold shell according to claim 1, characterized in that: The mold universal heightening pad (110) is provided above one end of the mold wiring panel (100) close to the wiring terminal (101) on the front panel.

3. The transformer high voltage coil casting mold shell according to claim 2, characterized in that: The two ends of the mold wiring panel (100) that are not connected to the front panel slide groove (210) are provided with screw holes, and the two ends of the mold universal heightening pad (110) that are not connected to the front panel slide groove (210) are provided with screw holes, and bolts are passed through the screw holes. The mold wiring panel (100) and the mold universal heightening pad (110) are fixedly connected by bolts.

4. The transformer high voltage coil casting mold shell according to claim 3, characterized in that: The mold base plate (400) is also provided with screw holes, and the screw holes on the mold base plate (400) are provided below the front panel slide groove (210), and the mold wiring panel (100) or the mold universal heightening pad (110) is fixedly connected to the mold base plate (400) by bolts.

5. The transformer high voltage coil casting mold shell according to claim 1, characterized in that: A mold inner wall (300) is provided in the inner cavity of the mold outer wall (200), and the mold inner wall (300) is a shell structure with openings at both ends. The mold inner wall (300) is fixedly connected to the mold bottom plate (400), and the mold inner wall (300) and the mold bottom plate (400) are in a vertical relationship.

6. The transformer high voltage coil casting mold shell according to claim 5, characterized in that: An internal press frame assembly is further provided on the side of the mold inner wall (300) opposite to the upper mold base plate (400), and the internal press frame assembly includes a plurality of internal press frame support parts (510) and internal press frame pressing parts (520), wherein the internal press frame support part (510) is in an elongated strip shape and is vertically connected to the mold base plate (400), one end of the internal press frame support part (510) is fixedly connected to the mold base plate (400), and the other end of the internal press frame support part (510) is fixedly connected to the internal press frame pressing part (520), and the internal press frame pressing part (520) is in a cross shape with four pressing arms, and one of the pressing arms of the internal press frame pressing part (520) is pressed at the opening of the mold inner wall (300).

7. The transformer high voltage coil casting mold shell according to claim 6, characterized in that: A pressing strip (530) is also provided on the inner pressure frame pressing portion (520), and the pressing strip (530) extends above the front panel slide groove (210). The pressing strip (530) is used to press the mold front panel in contact.

8. The transformer high voltage coil casting mold shell according to claim 1, characterized in that: The mold front panel further comprises a panel gasket (120), which is arranged between the mold wiring panel (100) and the mold universal heightening pad (110) or between two mold universal heightening pads (110). The panel gasket (120) is used to enhance the sealing between the mold wiring panel (100) and the mold universal heightening pad (110), as well as the sealing between the two mold universal heightening pads (110).

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