Epoxy resin air passage pouring outer mold structure for dry-type transformer

Abstract

The utility model relates to an epoxy resin air passage pouring outer mold structure for a dry-type transformer. The epoxy resin air passage pouring outer mold structure is characterized by comprising a pouring plate, an outer hoop plate, a top plate and a bottom plate, the guide groove is formed in the bottom plate, the outer hoop plate limiting clamping strip is matched with the guide groove, and the outer hoop plate limiting clamping strip is higher than the upper surface of the guide groove and can be used for clamping the bottom end of the outer hoop plate, so that the connection strength is improved; the outer hoop plate limiting clamping strip is tightly attached to the inner wall of the guide groove, it is guaranteed that epoxy resin can be prevented from entering the guide groove during pouring of the epoxy resin, the outer hoop plate limiting clamping strip can be pulled out for cleaning during cleaning, operation is more convenient, and during continuous production, the outer hoop plate limiting clamping strip is directly replaced to improve efficiency; besides, a T-shaped block designed at the top of the outer hoop plate is matched with a T-shaped groove structure in the top plate, the connection strength of the outer hoop plate can be effectively improved, and the T-shaped groove in the top of the outer hoop plate is not filled with epoxy resin, so that the problems of sealing and difficult cleaning do not need to be considered.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, and in particular to an epoxy resin air channel casting outer mold structure for dry-type transformers. Background Technology

[0002] Dry-type power transformers typically employ a foil-wound (copper or aluminum foil) structure for their low-voltage coils due to their low voltage and high current. Because the low-voltage coil is located between the iron core and the high-voltage coil, its heat dissipation is poor, necessitating the installation of cooling ducts. During the low-voltage coil winding process, a duct rod is placed at regular intervals. After the coil is cast, the duct rod is removed, forming the cooling duct.

[0003] In the epoxy resin casting of dry-type power transformers, the outer mold structure is often set up by using a simple sheet metal structure to clamp the outside of the dry-type transformer. However, there is a problem of poor bottom sealing during the casting process. Later, a method of inserting the outer clamp structure by opening a slot on the bottom plate of the mold was adopted. However, after the epoxy resin casting is completed, epoxy resin will enter the slot, which is very inconvenient to clean. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an epoxy resin air channel casting outer mold structure for dry-type transformers, which can solve the problems of poor sealing and inconvenient cleaning of epoxy resin outer molds for general dry-type transformers.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an epoxy resin air channel casting outer mold structure for dry-type transformers, the outer mold structure is used to cooperate with the epoxy resin air channel casting inner mold to form an epoxy resin casting cavity; its innovation lies in: including a casting plate, an outer hoop plate, a top plate and a bottom plate; the two ends of the outer hoop plate are connected to the casting plate, forming an outer contour with a waist-shaped cross-section, and the top and bottom ends of the outer hoop plate respectively cooperate with the top plate and the bottom plate;

[0006] The casting plate has a U-shaped structure and includes side plates and a casting panel; the casting panel is provided with an epoxy resin pouring port, and the side plates have a pair and are perpendicularly arranged on both sides of the casting panel; the side plates are provided with a number of bolt locking holes along the extension direction.

[0007] The outer hoop plate is a rectangular thin plate structure, and several corresponding bolt locking holes are provided at both ends of the outer hoop plate in the width direction; the connecting holes at both ends of the outer hoop plate are connected to the bolt locking holes of the side plate by bolts to form a waist-shaped structure; a T-shaped block is provided at the top of the outer hoop plate.

[0008] A guide groove is provided on the upper surface of the base plate along the outer circumferential direction of the epoxy resin inner mold, and an outer hoop plate limiting strip is embedded in the guide groove; the cross-section of the guide groove is T-shaped, and the cross-section of the outer hoop plate limiting strip is T-shaped and embedded in the guide groove on the base plate; the top end of the outer hoop plate limiting strip protrudes from the upper surface of the base plate, and a connecting seam for accommodating the bottom end of the outer hoop plate is provided on the top end of the outer hoop plate limiting strip along the vertical direction;

[0009] A T-shaped groove is provided on the lower surface of the top plate along the outer circumferential direction of the epoxy resin inner mold, and the T-shaped groove is used to cooperate with the T-shaped block at the top of the outer hoop plate to limit the top of the outer hoop plate on the lower surface of the top plate.

[0010] Furthermore, an overflow hole is provided on the casting panel near the top.

[0011] Furthermore, the top of the outer hoop plate has several T-shaped blocks, which are evenly spaced along the extension direction of the top of the outer hoop plate, and are used for guiding the top of the outer hoop plate when it is installed in the T-shaped groove of the top plate.

[0012] Furthermore, the outer hoop plate limiting strip is an elastic rubber strip structure, and the outer contour of the outer hoop plate limiting strip is tightly attached to the inner wall of the guide groove of the base plate.

[0013] The advantages of this utility model are:

[0014] 1) In this utility model, a guide groove is set on the base plate, and an outer hoop plate limiting strip is used to cooperate with the guide groove. The outer hoop plate limiting strip is higher than the upper surface of the guide groove and can be used to hold the bottom end of the outer hoop plate, increasing the connection strength. The outer hoop plate limiting strip is tightly attached to the inner wall of the guide groove, ensuring that epoxy resin can be prevented from entering the guide groove during pouring. The outer hoop plate limiting strip can be pulled out for cleaning, making the operation more convenient. In continuous production, the outer hoop plate limiting strip can be directly replaced to improve efficiency. In addition, the T-shaped block designed at the top of the outer hoop plate cooperates with the T-shaped groove structure on the top plate, which can effectively increase the connection strength of the outer hoop plate. Since the top T-shaped groove of the outer hoop plate is not filled with epoxy resin, there is no need to consider its sealing and cleaning difficulties. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the epoxy resin air channel casting outer mold structure for a dry-type transformer according to the present invention.

[0017] Figure 2 This is a top view of the outer hoop plate of an epoxy resin air channel casting outer mold structure for a dry-type transformer according to this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present 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 present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figure 1 Figure 2 The diagram shows an epoxy resin vent casting outer mold structure for a dry-type transformer. The outer mold structure is used to cooperate with the epoxy resin vent casting inner mold to form an epoxy resin casting cavity. It includes a casting plate 1, an outer hoop plate 2, a top plate 3, and a bottom plate 4. The two ends of the outer hoop plate 2 are connected to the casting plate 1, forming an outer contour with a waist-shaped cross-section. The top and bottom ends of the outer hoop plate 2 are respectively matched with the top plate 3 and the bottom plate 4.

[0021] The casting plate 1 has a U-shaped structure and includes side plates 11 and casting panel 12. The casting panel 12 is provided with epoxy resin pouring ports, and the side plates 11 have a pair and are vertically arranged on both sides of the casting panel 12. The side plates 11 are provided with a number of bolt locking holes along the extension direction.

[0022] The outer hoop 2 is a rectangular thin plate structure, and the two ends of the outer hoop 2 are provided with several corresponding bolt locking holes in the width direction; the connecting holes at both ends of the outer hoop 2 are connected to the bolt locking holes of the side plate 11 by bolts to form a waist-shaped structure; a T-shaped block 21 is provided at the top of the outer hoop 2.

[0023] A guide groove is provided on the upper surface of the base plate 4 along the outer circumferential direction of the epoxy resin inner mold, and an outer hoop plate limiting strip 5 is embedded in the guide groove; the cross section of the guide groove is T-shaped, the cross section of the outer hoop plate limiting strip 5 is T-shaped, and it is embedded in the guide groove on the base plate 4; the top of the outer hoop plate limiting strip 5 protrudes from the upper surface of the base plate 4, and the top of the outer hoop plate limiting strip 5 is provided with a connecting seam along the vertical direction to accommodate the bottom end of the outer hoop plate 2.

[0024] A T-shaped groove is provided on the lower surface of the top plate 3 along the outer circumferential direction of the epoxy resin inner mold, and the T-shaped groove is used to cooperate with the T-shaped block at the top of the outer hoop plate 2 to limit the top of the outer hoop plate 2 on the lower surface of the top plate 3.

[0025] An overflow hole is provided on the pouring panel 12 near the top.

[0026] The top of the outer hoop plate 2 has several T-shaped blocks, which are evenly spaced along the extension direction of the top of the outer hoop plate 2, and are used for guiding the top of the outer hoop plate 2 when it is installed in the T-shaped groove of the top plate.

[0027] The outer hoop limiting strip 5 is an elastic rubber strip structure, and the outer contour of the outer hoop limiting strip 5 is tightly attached to the inner wall of the guide groove of the base plate 4.

[0028] The working principle of this utility model is as follows: A guide groove is set on the base plate, and an outer hoop plate limiting strip is used to cooperate with the guide groove. The outer hoop plate limiting strip is higher than the upper surface of the guide groove and can be used to hold the bottom end of the outer hoop plate, increasing the connection strength. The outer hoop plate limiting strip is tightly attached to the inner wall of the guide groove, ensuring that epoxy resin can be prevented from entering the guide groove during pouring. The outer hoop plate limiting strip can be pulled out for cleaning, making the operation more convenient. In continuous production, the outer hoop plate limiting strip can be directly replaced to improve efficiency. In addition, the T-shaped block designed on the top of the outer hoop plate cooperates with the T-shaped groove structure on the top plate, which can effectively increase the connection strength of the outer hoop plate. Since the top T-shaped groove of the outer hoop plate is not filled with epoxy resin, there is no need to consider its sealing and cleaning difficulties.

[0029] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. An epoxy resin air duct pouring outer mold structure for dry-type transformer, the outer mold structure is used to match the epoxy resin air duct pouring inner mold to form the epoxy resin pouring cavity; characterized in that: It comprises a pouring plate, an outer hoop plate, a top plate and a bottom plate; the two ends of the outer hoop plate are connected to the pouring plate to form an outer contour with a waist-shaped cross section, and the top end and the bottom end of the outer hoop plate are matched with the top plate and the bottom plate respectively; ​ The pouring plate has a U-shaped structure, and comprises a side plate and a pouring panel; the pouring panel is provided with an epoxy pouring port, and the side plate is provided with a pair of side plates arranged perpendicularly on both sides of the pouring panel; a plurality of bolt locking holes are arranged on the side plate along the extension direction; The outer hoop plate has a rectangular thin plate structure, and the two ends of the outer hoop plate are provided with a plurality of connecting holes corresponding to the bolt locking holes in the width direction; the connecting holes at the two ends of the outer hoop plate are connected to the bolt locking holes of the side plate to form a waist-shaped structure; the top end of the outer hoop plate is provided with a T-shaped block; The upper surface of the bottom plate is provided with a guide groove along the outer side of the epoxy resin inner mold in the circumferential direction, and the guide groove is embedded with an outer hoop plate limiting clamping strip; the cross section of the guide groove is T-shaped, the cross section of the outer hoop plate limiting clamping strip is T-shaped, and the outer hoop plate limiting clamping strip is embedded in the guide groove on the bottom plate; the top end of the outer hoop plate limiting clamping strip protrudes from the upper surface of the bottom plate, and the top end of the outer hoop plate limiting clamping strip is provided with a connecting seam for accommodating the bottom end of the outer hoop plate along the vertical direction; The lower surface of the top plate is provided with a T-shaped groove along the outer side of the epoxy resin inner mold in the circumferential direction, and the T-shaped groove is used for cooperating with the T-shaped block at the top end of the outer hoop plate to limit the top end of the outer hoop plate on the lower surface of the top plate.

2. The epoxy resin air duct casting outer mold structure for a dry-type transformer according to claim 1, characterized by: The pouring panel is provided with an overflow hole near the top end.

3. The epoxy resin air duct casting outer mold structure for a dry-type transformer according to claim 1, characterized by: The T-shaped block at the top end of the outer hoop plate has a plurality of T-shaped blocks arranged at equal intervals along the extension direction of the top end of the outer hoop plate, which are used for guiding when the top end of the outer hoop plate is installed in the T-shaped groove of the top plate.

4. The epoxy resin air duct casting outer mold structure for a dry-type transformer according to claim 1, characterized by: The outer hoop plate limiting clamping strip has an elastic rubber strip structure, and the outer contour of the outer hoop plate limiting clamping strip is tightly attached to the inner wall of the guide groove of the bottom plate.

Images