Sealing plate die for boss and nut of epoxy resin coil in dry-type transformer

By providing multiple forming holes on the sealing mold and using sealing parts and detachably connected cone plugs, the problem of poor versatility of the sealing mold is solved, the production needs of transformers of different specifications are adapted, and production waste and costs are reduced.

CN223390362UActive Publication Date: 2025-09-26SUNTEN ELECTRICAL EQUIP CO LTD
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Patent Information

Application Number
CN202422611623.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2025-09-26
Estimated Expiration
2034-10-28

AI Technical Summary

Technical Problem

The existing sealing plate molds of dry-type transformers have poor versatility, resulting in different sealing plate molds required for transformers of different specifications, causing production waste and increased costs.

Method used

A sealing plate mold is designed. A plurality of forming holes are provided on the front sealing plate, which are divided into wire-outlet holes and non-wire-outlet holes according to production requirements. The non-wire-outlet holes are filled with sealing pieces, and a detachable connection is achieved through cone plugs and locking pieces to meet the production requirements of transformers of different specifications.

Benefits of technology

The versatility of the sealing mold is improved, production waste is reduced, the use cost is lowered, and it can be reused for a long time.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a sealing plate die for a boss and a nut of an epoxy resin coil in a dry-type transformer, which comprises a front sealing plate, a rear sealing plate, an upper sealing plate and a lower sealing plate, a forming area is arranged on the front sealing plate, a plurality of forming holes are formed in the forming area, and the forming holes are divided into wire outlet holes and non-wire outlet holes according to production requirements; the plugging piece is plugged in the non-wire outlet hole; when the epoxy resin coil is poured, the wire outlet boss and the wire outlet nut of the epoxy resin coil are located in the wire outlet hole. The multiple forming holes are innovatively formed in the front sealing plate, then according to production requirements, the forming holes where the wire outlet bosses and the wire outlet nuts need to be poured at the reserved positions are defined as the wire outlet holes, the other forming holes are defined as the non-wire outlet holes, and the non-wire outlet holes are filled with the plugging pieces; different forming holes can be selected as the wire outlet holes according to different production requirements, the structure is reasonable, the universality is high, the wire outlet holes can be repeatedly used for a long time, waste is reduced, and the use cost is reduced.
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Description

Technical Field

[0001] The utility model belongs to the technical field of transformer production and manufacturing, and particularly relates to a sealing plate mold used for a boss and a nut of an epoxy resin coil in a dry-type transformer. Background Art

[0002] Epoxy resin dry-type transformers (hereinafter referred to as dry-type transformers) use epoxy resin as the insulation material. High and low voltage windings are wound with copper strip (foil), which is then poured and cured in a vacuum to form a high-strength fiberglass structure. These transformers offer excellent electrical performance, strong lightning and short-circuit resistance, and are compact and lightweight.

[0003] The casting of the epoxy resin coil's lead bosses and lead nuts is a critical step in the manufacturing of these dry-type transformers. Different dry-type transformer specifications have different casting requirements for lead bosses and lead nuts (for example, the number of lead bosses and lead nuts varies). This means that corresponding sealing molds must be used for each dry-type transformer specification, resulting in poor versatility. Utility Model Content

[0004] In order to overcome the above technical defects, the utility model provides a sealing mold for the boss and nut of the epoxy resin coil in a dry-type transformer, which aims to solve the technical problem of poor versatility of the sealing mold in the prior art.

[0005] The utility model is implemented according to the following technical solutions:

[0006] The utility model provides a sealing plate mold for a boss and a nut of an epoxy resin coil in a dry-type transformer, which comprises:

[0007] A front sealing plate, which is used to connect to the coil forming template; the front sealing plate is provided with a forming area, and the forming area is provided with a plurality of forming holes, and the forming holes are divided into wire outlet holes and non-wire outlet holes according to production requirements;

[0008] A blocking member, which blocks the non-wire outlet hole;

[0009] When the epoxy resin coil is cast, the wire outlet boss and the wire outlet nut of the epoxy resin coil are located in the wire outlet hole.

[0010] Compared with the existing technology, the present application innovatively opens multiple forming holes on the front sealing plate, and then, according to production requirements, defines the forming holes that require reserved space for casting the wire-outlet boss and the wire-outlet nut as wire-outlet holes, and the remaining forming holes are defined as non-wire-outlet holes, and the non-wire-outlet holes are filled with sealing parts; the present application can select different forming holes as wire-outlet holes according to different production requirements, has a reasonable structure, strong versatility, and can be reused for a long time, reducing waste in the production process and reducing the cost of use.

[0011] In one embodiment, the forming hole includes a tapered section, and the tapered section is provided with a first opening disposed toward the coil forming template;

[0012] The blocking member includes a tapered plug, which is placed in the tapered section through the first opening.

[0013] In one embodiment, the forming hole further includes a connecting section, which is connected to the tapered section, and the connecting section is provided with a second opening disposed away from the coil forming template;

[0014] The blocking member further includes a locking member, which is placed in the connecting section through the second opening and is detachably connected to the cone plug.

[0015] In one embodiment, the forming hole further includes a transition section, which is located between the tapered section and the connecting section, the aperture of the connecting section is larger than the aperture setting of the connecting section, and the aperture of the connecting section is smaller than the minimum aperture setting of the tapered section.

[0016] In one embodiment, the tapered plug has a narrowed end and a widened end, and the end surface of the narrowed end is provided with a convex portion;

[0017] When the tapered plug is placed in the tapered section, the protrusion is located in the transition section.

[0018] In one embodiment, the locking member is a bolt;

[0019] The cone plug is provided with a threaded hole which is matched with the external thread of the bolt.

[0020] In one embodiment, the plurality of forming holes on the forming area are distributed from top to bottom on the front sealing plate.

[0021] In one embodiment, the front sealing plate is further provided with an installation area, and the installation area is respectively arranged on the left and right sides of the molding area; and the installation area is provided with installation holes.

[0022] In one embodiment, the thickness of the front sealing plate at the installation area is smaller than the thickness of the front sealing plate at the molding area.

[0023] In one embodiment, the front sealing plate is made of aluminum alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a front view of a sealing plate mold used for the boss and nut of the epoxy resin coil in the dry-type transformer of the present invention;

[0026] Figure 2 A side view of a sealing die for the boss and nut of the epoxy resin coil in the dry-type transformer of the present invention;

[0027] Figure 3 A top view of a sealing plate mold used for the boss and nut of the epoxy resin coil in the dry-type transformer of the present invention;

[0028] Figure 4 This is the main view of the front cover;

[0029] Figure 5 It is a partial schematic diagram of the front cover;

[0030] Figure 6 This is one of the cross-sectional views of the front cover (wire outlet);

[0031] Figure 7 This is the second cross-sectional view of the front cover (not the wire outlet hole).

[0032] Description of reference numerals:

[0033] 10 front sealing plate, 110 forming area, 111 forming hole, 1111 tapered section, 1112 connecting section, 1113 transition section, 111a outlet hole, 111b non-outlet hole, 120 installation area, 121 installation hole, 210 cone plug, 211 protrusion, 220 locking piece, 30 coil forming template DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0035] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0036] It should be clear that the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0037] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, in this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0040] Combine Figures 1 to 7 As shown, the utility model provides a sealing plate mold for the boss and nut of the epoxy resin coil in a dry-type transformer, which includes: a front sealing plate 10, which is used to connect with the coil forming template 30; the front sealing plate 10 is provided with a molding area 110, and the molding area 110 is provided with a plurality of molding holes 111, and the molding holes 111 are divided into outlet holes 111a and non-outlet holes 111b according to production requirements; a sealing member, which is sealed in the non-outlet hole 111b; when the epoxy resin coil is cast, the outlet boss and outlet nut of the epoxy resin coil are located in the outlet hole 111a.

[0041] Compared with the prior art, the present application innovatively opens a plurality of forming holes 111 on the front sealing plate 10, and then, according to production requirements, the forming holes 111 that require reserved space for casting the wire-outlet boss and the wire-outlet nut are defined as wire-outlet holes 111a, and the remaining forming holes 111 are defined as non-wire-outlet holes 111b, and the non-wire-outlet holes 111b are filled with sealing parts; the present application can select different forming holes 111 as wire-outlet holes 111a according to different production requirements, has a reasonable structure, strong versatility, and can be reused for a long time, reducing waste in the production process and reducing the cost of use.

[0042] It should be noted that the production requirements mentioned above refer to the fact that according to the different specifications of dry-type transformers, the number and position of the wire outlet bosses and wire outlet nuts on the epoxy resin coils are also different accordingly. This application determines which molded holes 111 need to be sealed to become non-wire outlet holes 111b, and which molded holes 111 need to be reserved to become wire outlet holes 111a based on the specifications of the dry-type transformers to be produced, so as to meet the production requirements.

[0043] Regarding the design of the forming hole 111, in this embodiment, the forming hole 111 comprises a tapered section 1111 with a first opening facing the coil forming template 30. The sealing member comprises a tapered plug 210, which is placed within the tapered section 1111 through the first opening. In this embodiment, the tapered plug 210 fills the tapered section 1111. After filling, the end surface of the tapered plug 210 facing the coil forming template 30 is flush with the plane of the front sealing plate 10 facing the coil forming template 30. This not only seals the non-wire outlet hole 111b but also reduces the number of processing steps required at this location after demolding.

[0044] After the conical plug 210 is filled in the conical section 1111, in order to prevent the conical plug 210 from detaching from the conical section 1111, the forming hole 111 further includes a connecting section 1112, which is communicated with the conical section 1111, and the connecting section 1112 is provided with a second opening arranged back to the coil forming template 30; the sealing member also includes a locking member 220, and the locking member 220 is placed in the connecting section 1112 through the second opening and is detachably connected to the conical plug 210, and is connected to the conical plug 210 by using the locking member 220 to prevent the conical plug 210 from loosening.

[0045] Furthermore, the locking member 220 is a bolt; the cone plug 210 is provided with a threaded hole adapted to the external thread of the bolt, and the position of the cone plug 210 is fixed by the bolt through threaded matching.

[0046] Furthermore, the forming hole 111 also includes a transition section 1113, which is located between the conical section 1111 and the connecting section 1112, and the aperture of the connecting section 1112 is larger than the aperture setting of the connecting section 1112, and the aperture of the connecting section 1112 is smaller than the minimum aperture setting of the conical section 1111; when it is difficult to remove the cone plug 210 from the conical section 1111, a tool can be used to extend from the second opening into the connecting section 1112 to the transition section 1113, and the cone plug 210 can be ejected toward the first opening in the space of the transition section 1113 with the help of the tool.

[0047] Furthermore, the conical plug 210 has a narrowed end and a widened end, and the end surface of the narrowed end is provided with a convex portion 211 ; when the conical plug 210 is placed in the conical section 1111 , the convex portion 211 is located in the transition section 1113 .

[0048] In one embodiment, the plurality of forming holes 111 on the forming area 110 are distributed on the front sealing plate 10 from top to bottom.

[0049] In this embodiment, the front cover 10 is further provided with an installation area 120, and the installation area 120 is respectively arranged on the left and right sides of the forming area 110; the installation area 120 is provided with a installation hole 121; the installation hole 121 corresponds to the threaded hole on the coil forming template 30, and a bolt can be passed through the installation hole 121 and then tightened to fit the threaded hole, so that the front cover 10 can be installed and connected to the coil forming template 30.

[0050] Furthermore, the thickness of the installation area 120 of the front cover 10 is set to be smaller than the thickness of the molding area 110 of the front cover 10. By reducing the thickness of the non-important area of ​​the front cover 10 (i.e., the installation area 120) so as to reduce the weight, facilitate transportation and ensure that it can be operated by a single person, the production cost can also be reduced.

[0051] In this embodiment, the front cover 10 is made of aluminum alloy material, so as to reduce the weight by using aluminum alloy material, facilitate transportation and ensure that it can be operated by one person.

[0052] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience of description only and do not constitute any limitation to the present invention.

Claims

1. A sealing die for the boss and nut of the epoxy resin coil in a dry-type transformer, characterized in that: include: A front sealing plate, which is used to connect to the coil forming template; the front sealing plate is provided with a forming area, and the forming area is provided with a plurality of forming holes, and the forming holes are divided into wire outlet holes and non-wire outlet holes according to production requirements; A blocking member, which blocks the non-wire outlet hole; When the epoxy resin coil is cast, the wire outlet boss and the wire outlet nut of the epoxy resin coil are located in the wire outlet hole.

2. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 1, characterized in that: The forming hole includes a tapered section, and the tapered section is provided with a first opening arranged toward the coil forming template; The blocking member includes a tapered plug, which is placed in the tapered section through the first opening.

3. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 2, characterized in that: The forming hole further includes a connecting section, which is connected to the tapered section, and the connecting section is provided with a second opening disposed away from the coil forming template; The blocking member further includes a locking member, which is placed in the connecting section through the second opening and is detachably connected to the cone plug.

4. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 3, characterized in that: The forming hole also includes a transition section, which is located between the tapered section and the connecting section. The pore size of the connecting section is larger than the pore size setting of the connecting section, and the pore size of the connecting section is smaller than the minimum pore size setting of the tapered section.

5. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 4, characterized in that: The cone plug has a narrowed end and a widened end, and the end surface of the narrowed end is provided with a convex portion; When the tapered plug is placed in the tapered section, the protrusion is located in the transition section.

6. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 3, characterized in that: The locking member is a bolt; The cone plug is provided with a threaded hole which is matched with the external thread of the bolt.

7. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 5, characterized in that: The plurality of forming holes on the forming area are distributed on the front sealing plate from top to bottom.

8. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 1, characterized in that: The front sealing plate is further provided with an installation area, which is respectively arranged on the left and right sides of the molding area; and the installation area is provided with installation holes.

9. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 8, characterized in that: The thickness of the front sealing plate at the installation area is set to be smaller than the thickness of the front sealing plate at the molding area.

10. The sealing mold for the boss and nut of the epoxy resin coil in the dry-type transformer according to claim 1, characterized in that: The front sealing plate is made of aluminum alloy material.