Closed opening sealing structure for transformer coil mold assembly

Abstract

The utility model relates to a closed opening sealing structure for assembling a transformer coil mould, which comprises a mould, a T-shaped sealing strip, a pressing strip and a clamping component, mould closed opening folded plates are arranged on two sides of a closed opening of the mould, and a longitudinal part of the T-shaped sealing strip is arranged between the two mould closed opening folded plates. The transverse part of the T-shaped sealing strip abuts against the ends of the two mold closing folded plates, the clamping assembly comprises a C-shaped clamping piece, pressing strips are arranged on the sides, away from the longitudinal part, of the two mold closing folded plates, the two pressing strips are clamped through a clamping opening of the C-shaped clamping piece, a clamping connecting bolt is inserted into the C-shaped clamping piece, and the clamping connecting bolt is connected with the clamping assembly. And the outer side of the transverse part is propped against the clamping connecting bolt. The T-shaped sealing strip is used for replacing a long-strip-shaped sealing strip, repeated adjustment is not needed in the whole installation process, meanwhile, the sealing performance can be ensured, and the T-shaped sealing strip can be repeatedly used.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing, specifically a sealing structure for the assembly of transformer coil molds. Background Technology

[0002] In the prior art, in order to reduce the manufacturing cost of dry-type transformers, most of the coil molds for dry-type transformers are thin plate molds, that is, steel plates with a thickness of 1.5mm to 2.0mm are rolled and bent to form the mold. For example, CN203085356U patent discloses a fixed structure for epoxy casting dry-type transformer molds, which includes a flange and an outer mold, and the outer mold is made of stainless steel plate.

[0003] Rubber plates are typically used for sealing the bending joints of steel plate molds. Existing technology uses long, narrow rubber plates with the same width as the mold's folded edge and the same height as the mold. However, in actual production, it has been found that these long, narrow rubber plates have poor tensile strength and are difficult to position. They often end up misaligned or protruding from the mold's height, requiring repeated adjustments. This increases the complexity of production operations and reduces efficiency. Furthermore, misalignment of the long, narrow sealing rubber plates can lead to unevenness inside the mold opening after casting, and inconsistent resin insulation layer thickness at the mold opening, thus reducing the product's mechanical and electrical properties. Additionally, misalignment can also cause incomplete sealing at the mold opening and material leakage during casting, severely impacting product casting quality.

[0004] Patent CN215110483U discloses a sealing strip for a resin casting coil mold of a dry-type transformer. It includes an integrally connected front groove, a rear groove, and a base. The strip has a concave cross-section with a square groove at the top center. The front and rear grooves are narrower at the top and wider at the bottom, with beveled surfaces on their outer sides. The base has a concave bottom with an arc surface. The rear groove is higher than the front groove, and its top cross-section has a protrusion facing the groove. However, this sealing strip has a relatively complex shape and is mainly used for sealing between a thin-walled outer mold and the mold base plate, not for sealing the mold's joint folding plate. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for the assembly of transformer coil molds. It uses a T-shaped sealing strip instead of the long strip sealing strip in the prior art. The entire installation process does not require repeated adjustments, which improves production efficiency and can further ensure sealing performance. At the same time, the T-shaped sealing strip can be reused repeatedly, with a high utilization rate.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A sealing structure for assembling transformer coil molds includes a mold, a T-shaped sealing strip, pressure strips, and a clamping assembly. The mold has mold closing plates on both sides of its opening. The longitudinal portion of the T-shaped sealing strip is positioned between the two mold closing plates, and the transverse portion of the T-shaped sealing strip abuts against the ends of the two mold closing plates. The clamping assembly includes a C-shaped clamp. Pressure strips are provided on the side of each mold closing plate away from the longitudinal portion, and the two pressure strips are clamped through the clamping opening of the C-shaped clamp. A clamping connecting bolt is inserted into the C-shaped clamp, and the outer side of the transverse portion abuts against the clamping connecting bolt.

[0008] The C-type clamp includes a first clamp and a second clamp respectively disposed on both sides of the T-shaped sealing strip. The first clamp is provided with an embedding part, and the second clamp is provided with an embedding groove for the embedding part to be inserted. The free ends of the first clamp and the free ends of the second clamp form the clamping opening. The first clamp and the second clamp are fixedly connected by the clamping connecting bolt.

[0009] The clamping connecting bolt is provided with a clamping nut, and the outer sides of the first clamp and the second clamp respectively abut against the clamping nuts on the corresponding sides.

[0010] The mold has a lower end plate on its lower side and a pressing frame on its upper side, and the pressing frame is connected to the lower end plate through a tensioning screw passing through the mold.

[0011] The pressing frame includes four pressing arms arranged in a cross shape, and each pressing arm is provided with an adjustment groove for the tensioning screw to pass through.

[0012] The advantages and positive effects of this utility model are as follows:

[0013] 1. This utility model uses a T-shaped sealing strip to replace the long strip sealing strip in the prior art. During installation, the longitudinal part of the T-shaped sealing strip is simply inserted between the two mold joint plates at the mold joint to achieve accurate positioning. Then, the pressure strip, C-shaped clamp and clamping connecting bolt are installed in sequence. After the clamping connecting bolt is installed, the outward displacement of the lateral part of the T-shaped sealing strip is limited, thereby ensuring that the T-shaped sealing strip will not fall off. The entire installation process does not require repeated adjustments, thus improving production efficiency.

[0014] 2. The clamping component of this utility model can be flexibly adjusted to adjust the width of the clamping opening according to actual needs. At the same time, the clamping nut on the clamping connecting bolt can also be flexibly adjusted to adjust the clamping force according to actual needs, so as to ensure reliable clamping and make the use more flexible.

[0015] 3. The T-shaped sealing strip of this utility model is made of highly transparent fumed silica gel, which has high tear resistance, can be reused repeatedly, and has a high utilization rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the usage state of this utility model.

[0017] Figure 2 for Figure 1 Top view of the middle mold.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the image.

[0019] Figure 4 This is a three-dimensional schematic diagram of the present invention.

[0020] Figure 5 for Figure 4 A schematic diagram of the T-shaped sealing strip structure.

[0021] Figure 6 This is a schematic diagram of the assembly of a long strip sealing strip in the prior art.

[0022] Among them, 1 is the lower end plate, 2 is the mold, 201 is the mold closing folding plate, 3 is the T-shaped sealing strip, 301 is the longitudinal part, 302 is the transverse part, 4 is the press-fit frame, 401 is the adjustment groove, 5 is the pressure strip, 6 is the tensioning screw, 7 is the clamping assembly, 701 is the clamping connecting bolt, 702 is the first clamping member, 7021 is the embedding part, 703 is the second clamping member, 7031 is the embedding groove, 704 is the clamping nut, 705 is the C-shaped clamping member, and 8 is the long strip sealing strip. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figures 1-5 As shown, this utility model includes a mold 2, a T-shaped sealing strip 3, a pressure strip 5, and a clamping assembly 7, wherein... Figure 5 As shown, the T-shaped sealing strip 3 includes a longitudinal portion 301 and a transverse portion 302 that are perpendicular to each other, and as... Figures 3-4As shown, mold 2 has mold closing folding plates 201 on both sides of the mold opening, and the longitudinal part 301 of the T-shaped sealing strip 3 is located between the two mold closing folding plates 201. The transverse part 302 of the T-shaped sealing strip 3 abuts against the ends of the two mold closing folding plates 201. The clamping assembly 7 includes a C-shaped clamp 705. The two mold closing folding plates 201 are provided with pressure strips 5 on the side away from the longitudinal part 301, and the two pressure strips 5 are clamped through the clamping opening of the C-shaped clamp 705. A clamping connecting bolt 701 is inserted into the C-shaped clamp 705, and the outer side of the transverse part 302 of the T-shaped sealing strip 3 abuts against the clamping connecting bolt 701. During installation, this utility model only requires inserting the longitudinal portion 301 of the T-shaped sealing strip 3 between the two mold fitting plates 201 to achieve accurate positioning. Then, the pressure strip 5, C-shaped clamp 705, and clamping connecting bolt 701 are installed sequentially. The clamping connecting bolt 701, once installed, limits the outward displacement of the transverse portion 302, thereby ensuring that the T-shaped sealing strip 3 will not fall off. Figure 6 As shown, compared to the long strip sealing strips in the prior art, this utility model does not require repeated adjustments during the entire installation process, greatly improving production efficiency. Meanwhile, as... Figure 3 As shown, in addition to using the longitudinal portion 301 of the T-shaped sealing strip 3 to achieve sealing, the transverse portion 302 of the T-shaped sealing strip 3 covers the ends of the two mold fitting plates 201, which can further ensure the sealing performance. In addition, in this embodiment, the T-shaped sealing strip 3 is made of highly transparent fumed silica gel, which has high tear resistance. Therefore, the T-shaped sealing strip 3 can be reused repeatedly and has a high utilization rate.

[0025] like Figure 4 As shown, in this embodiment, the C-shaped clamp 705 is a split structure, which includes a first clamp 702 and a second clamp 703 respectively disposed on both sides of the T-shaped sealing strip 3. The first clamp 702 is provided with an embedding part 7021, and the second clamp 703 is provided with an embedding groove 7031 for the embedding part 7021 to be inserted. The free ends of the first clamp 702 and the free ends of the second clamp 703 form clamping openings for clamping the pressure strips 5 on both sides. Through the above structure, the clamping openings of the C-shaped clamp 705 can be flexibly adjusted according to the specifications of the T-shaped sealing strip 3, pressure strip 5 and other components, thereby improving the scope of application and flexibility of use. After the first clamp 702 and the second clamp 703 have completed clamping, the clamping connecting bolt 701 passes through the first clamp 702 and the second clamp 703 to fix them together.

[0026] like Figure 4As shown, in this embodiment, the clamping connecting bolt 701 is provided with a clamping nut 704, and the outer side of the first clamp 702 and the outer side of the second clamp 703 respectively abut against the clamping nut 704 on the corresponding side. In this way, when using this utility model, the clamping nuts 704 on both sides can be screwed on according to the actual situation to flexibly adjust the clamping force.

[0027] like Figure 1 As shown, the mold 2 has a lower end plate 1 on the lower side and a pressing frame 4 on the upper side. The pressing frame 4 is connected to the lower end plate 1 through a tensioning screw 6 passing through the mold 2, thereby achieving the pressing and fixing of the mold 2.

[0028] like Figure 2 As shown, in this embodiment, the pressing frame 4 includes four pressing arms arranged in a cross shape, and each pressing arm is provided with an adjustment groove 401 for the tensioning screw 6 to pass through, so that the position of the pressing frame 4 and other components can be flexibly adjusted according to the actual situation.

[0029] In this embodiment, the mold 2 is an inner mold. This utility model can also be used for an outer mold. The outer mold can be found in patents such as CN203085356U.

[0030] The working principle of this utility model is as follows:

[0031] During installation, this utility model only requires inserting the longitudinal portion 301 of the T-shaped sealing strip 3 between the two mold fitting plates 201 at the mold 2's joint to achieve accurate positioning. The transverse portion 302 of the T-shaped sealing strip 3 abuts against the ends of the two mold fitting plates 201 to ensure accurate positioning. Then, the pressure strip 5, C-shaped clamp 705, and clamping connecting bolt 701 are installed sequentially. The C-shaped clamp 705 includes a first clamp 702 and a second clamp 703 located on both sides of the T-shaped sealing strip 3. During installation, the first clamp 702 and the second clamp 703 can be adjusted according to actual needs. The degree of embedding between the two clamping parts 703 allows for flexible adjustment of the clamping opening of the C-type clamping part 705 according to the specifications of components such as the T-shaped sealing strip 3 and the pressure strip 5. This ensures a secure clamping and improves the applicability and flexibility of this invention. In addition, after the clamping connecting bolt 701 is installed, it limits the outward displacement of the transverse part 302, thereby ensuring that the T-shaped sealing strip 3 will not fall off. Furthermore, a clamping nut 704 is provided on the clamping connecting bolt 701 to further ensure a secure clamping, and the clamping force can be flexibly adjusted according to actual needs.

[0032] like Figure 6 As shown, compared to the long strip sealing strips in the prior art, this utility model does not require repeated adjustments during the entire installation process, greatly improving production efficiency. Meanwhile, as... Figure 3As shown, in addition to using the longitudinal part 301 of the T-shaped sealing strip 3 to achieve sealing, the transverse part 302 of the T-shaped sealing strip 3 covers the ends of the two mold joint folding plates 201, which can further ensure the sealing performance. In addition, the T-shaped sealing strip 3 of this invention is made of highly transparent fumed silica gel, which has high tear resistance and can be reused repeatedly, resulting in high utilization.

Claims

1. A sealing structure for the assembly of a transformer coil mold, characterized in that: The assembly includes a mold (2), a T-shaped sealing strip (3), a pressure strip (5), and a clamping assembly (7). The mold (2) has mold closing plates (201) on both sides of the opening. The longitudinal part (301) of the T-shaped sealing strip (3) is located between the two mold closing plates (201). The transverse part (302) of the T-shaped sealing strip (3) abuts against the ends of the two mold closing plates (201). The clamping assembly (7) includes a C-shaped clamp (705). The two mold closing plates (201) are provided with pressure strips (5) on the side away from the longitudinal part (301). The two pressure strips (5) are clamped through the clamping opening of the C-shaped clamp (705). A clamping connecting bolt (701) is inserted into the C-shaped clamp (705). The outer side of the transverse part (302) abuts against the clamping connecting bolt (701).

2. The sealing structure for the assembly of transformer coil molds according to claim 1, characterized in that: The C-type clamp (705) includes a first clamp (702) and a second clamp (703) respectively disposed on both sides of the T-shaped sealing strip (3). The first clamp (702) is provided with an embedding part (7021), and the second clamp (703) is provided with an embedding groove (7031) for the embedding part (7021) to be inserted. The free ends of the first clamp (702) and the free ends of the second clamp (703) form the clamping opening. The first clamp (702) and the second clamp (703) are fixedly connected by the clamping connecting bolt (701).

3. The sealing structure for the assembly of transformer coil molds according to claim 2, characterized in that: The clamping connecting bolt (701) is provided with a clamping nut (704), and the outer side of the first clamp (702) and the outer side of the second clamp (703) respectively abut against the clamping nut (704) on the corresponding side.

4. The sealing structure for the assembly of transformer coil molds according to claim 1, characterized in that: The mold (2) has a lower end plate (1) on its lower side and a pressing frame (4) on its upper side. The pressing frame (4) is connected to the lower end plate (1) by a tensioning screw (6) passing through the mold (2).

5. The sealing structure for the assembly of transformer coil molds according to claim 4, characterized in that: The press frame (4) includes four press arms arranged in a cross shape, and each press arm is provided with an adjustment groove (401) through which the tensioning screw (6) passes.

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