Sealing structure for high-voltage bushing of transformer

Abstract

The invention discloses a transformer high-voltage bushing sealing structure which comprises a bushing oil conservator shell, and the bushing oil conservator shell comprises a bushing oil conservator shell body and an assembly protruding head extending from one end of the bushing oil conservator shell body. The sleeve aluminum rod is arranged in the sleeve oil conservator shell, and one end part of the sleeve aluminum rod extends out of the assembly raised head; an assembling concave cavity is formed in the sleeve coupling cap, a threaded hole is formed in the bottom of the assembling concave cavity, a first assembling face is arranged in the assembling concave cavity, and a second assembling face is arranged on the end side of the sleeve coupling cap. And a sleeve outgoing line metal column head. By means of the transformer high-voltage bushing sealing structure, the damp-proof and waterproof performance of the transformer high-voltage bushing can be improved; the structure is simple and reasonable, and repair and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of transformer high-voltage bushing technology, and in particular to a sealing structure for transformer high-voltage bushings. Background Technology

[0002] High-voltage bushings of 110kV and above transformers are critical accessories. Bushing failures can lead to transformer shutdowns or even fires and explosions.

[0003] In the existing technology, the presence of oil pressure inside the transformer, coupled with the unreasonable structural design of the transformer's high-voltage bushing, are the key reasons for water ingress and moisture absorption into the top bushing of the transformer, leading to malfunctions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a sealing structure for high-voltage bushings of transformers, which can improve the moisture-proof and waterproof performance of high-voltage bushings of transformers; the structure is simple and reasonable, and easy to repair and maintain.

[0005] To solve the above-mentioned technical problems, the present invention provides a high-voltage bushing sealing structure for a transformer, comprising: a bushing oil conservator shell, the bushing oil conservator shell including: a bushing oil conservator shell body and an assembly protrusion extending from one end of the bushing oil conservator shell body; a bushing aluminum rod installed inside the bushing oil conservator shell, one end of the bushing aluminum rod extending out from the assembly protrusion; a bushing cap, the bushing cap having an assembly cavity inside, a threaded hole at the bottom of the assembly cavity, a first assembly surface in the assembly cavity, and a second assembly surface on the end side of the bushing cap; and a bushing outlet metal post, wherein: one end of the bushing outlet metal post is fastened to the threaded hole in the bushing cap, and the opposite end of the bushing outlet metal post is accommodated in the bushing aluminum rod; the bushing cap is sealed and sleeved on the outside of the bushing oil conservator shell, the first assembly surface seals against the end face of the assembly protrusion of the bushing oil conservator shell body, and the second assembly surface seals against the bushing oil conservator shell body, thereby cutting off the communication path between the inside of the bushing oil conservator shell and the external atmosphere.

[0006] It also includes: a first sealing gasket installed on the first assembly surface and a second sealing gasket installed on the second assembly surface, wherein the first sealing gasket and the second sealing gasket have a height difference.

[0007] The height dimensions of the first sealing gasket and the second sealing gasket are set to be the same; the sleeve cap is fitted onto the outside of the sleeve oil conservator shell, and the first sealing gasket and the second sealing gasket are compressed synchronously and uniformly, so that the compression of the first sealing gasket and the second sealing gasket is consistent.

[0008] It also includes: a transformer lead for current-carrying output connected to the bushing outlet metal post, wherein: the transformer lead and the end of the bushing outlet metal post connected to the transformer lead are housed in the bushing aluminum rod.

[0009] The casing oil conservator housing also includes: a casing outer sheath that is sealed and connected to one end of the casing oil conservator housing body, and one end of the casing aluminum rod is housed in the casing outer sheath.

[0010] The outer sheath of the bushing and the outer shell of the bushing oil conservator are filled with insulating oil for soaking the bushing capacitor core.

[0011] It also includes: a column head fixing pin, wherein: the column head fixing pin passes through the metal column head of the sleeve outlet and the aluminum rod of the sleeve for fastening, thereby limiting and fixing the metal column head of the sleeve outlet.

[0012] Among them, the sleeve cap is a conductive current-carrying structure made of copper; the end of the sleeve outlet metal column is provided with an external thread that matches the threaded hole in the assembly cavity.

[0013] The transformer high-voltage bushing sealing structure of the present invention has the following beneficial effects: The transformer high-voltage bushing sealing structure includes: a bushing oil conservator shell, the bushing oil conservator shell including: a bushing oil conservator shell body and an assembly protrusion extending from one end of the bushing oil conservator shell body; a bushing aluminum rod installed inside the bushing oil conservator shell, one end of the bushing aluminum rod extending out from the assembly protrusion; a bushing cap, the bushing cap having an assembly cavity inside, a threaded hole at the bottom of the assembly cavity, a first assembly surface in the assembly cavity, and a second assembly surface on the end side of the bushing cap; The bushing includes a metal outlet head, one end of which is fastened to a threaded hole in the bushing cap, and the other end of which is housed in the bushing aluminum rod. The bushing cap is sealed to the outside of the bushing oil tank housing, with the first mounting surface sealing against the end face of the mounting protrusion on the bushing oil tank housing body, and the second mounting surface sealing against the bushing oil tank housing body. This cuts off the path of communication between the bushing oil tank housing and the external atmosphere, thereby improving the moisture-proof and waterproof performance of the transformer high-voltage bushing. The structure is simple and reasonable, facilitating maintenance and repair. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a cross-sectional schematic diagram of the transformer high-voltage bushing sealing structure according to an embodiment of the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 The image shows an embodiment of the transformer high-voltage bushing sealing structure of the present invention.

[0018] The high-voltage bushing sealing structure of the transformer in this embodiment includes: a bushing oil conservator shell 1, which includes: a bushing oil conservator shell body 11 and an assembly protrusion 12 extending from one end of the bushing oil conservator shell body 11; a bushing aluminum rod 2 installed inside the bushing oil conservator shell 1, with one end of the bushing aluminum rod 2 extending out from the assembly protrusion 12; a bushing cap 3, which has an assembly cavity 31 inside, a threaded hole 32 at the bottom of the assembly cavity 31, a first assembly surface 318 in the assembly cavity 31, and a second assembly surface 319 on the end side of the bushing cap 3; and a bushing outlet metal column head 4.

[0019] Wherein: one end of the bushing outlet metal column 4 is fastened in the threaded hole 32 in the bushing cap 3, and the other end of the bushing outlet metal column 4 is accommodated in the bushing aluminum rod 2.

[0020] The casing cap 3 is sealed and fitted onto the outside of the casing oil conservator shell 1. The first mounting surface 318 is sealed and abuts against the end face of the mounting protrusion 12 of the casing oil conservator shell body 1, and the second mounting surface 319 is sealed and abuts against the casing oil conservator shell body 11, so as to cut off the communication path between the inside of the casing oil conservator shell 1 and the outside atmosphere.

[0021] In practical implementation, the bushing oil conservator shell 1 serves as a carrier for the bushing insulating oil, and its top end can be connected to the bushing cap 3. The bushing oil conservator shell 1 includes: a bushing oil conservator shell body 11 and an assembly protrusion 12, which is generally convex in shape. In this embodiment, the bushing oil conservator shell 1 also includes: a bushing outer sheath 13 that is sealed and connected to one end of the bushing oil conservator shell body 12. The bushing outer sheath 13 is also filled with insulating oil for soaking the bushing capacitor core. That is to say, both the bushing outer sheath 13 and the bushing oil conservator shell body 12 are filled with insulating oil for soaking the bushing capacitor core.

[0022] Furthermore, the bushing aluminum rod 2 is in the shape of a sleeve rod, with one end of it being housed in the outer sheath 13 of the bushing. The function of the bushing aluminum rod 2 is to serve as a channel for arranging the transformer leads.

[0023] Furthermore, the function of the sleeve cap 3 is to be detachably assembled to the top of the sleeve oil conservator shell 1, and it is a conductive current-carrying structure made of copper. The sleeve cap 3 has an assembly cavity 31 inside, a threaded hole 32 at the bottom of the assembly cavity 31, a first assembly surface 318 in the assembly cavity 31, and a second assembly surface 319 on the end side of the sleeve cap 3.

[0024] Furthermore, the metal column head 4 of the bushing outlet is a current-carrying component, which is cylindrical, and its end side is provided with an external thread that matches the threaded hole 32 in the assembly cavity 31. After the two are assembled, the current-carrying function is realized.

[0025] Preferably, the transformer high-voltage bushing sealing structure in this embodiment further includes: a transformer lead 5 connected to the bushing outlet metal post 4 for current carrying output. The transformer lead 5 and the end of the bushing outlet metal post 4 connected to the transformer lead 5 are housed within the bushing aluminum rod 2.

[0026] During implementation, the metal column head 4 of the sleeve outlet is fixed by the column head fixing pin 6, wherein: the column head fixing pin 6 passes through the metal column head 4 of the sleeve outlet and the aluminum rod of the sleeve to tighten it, thereby limiting and fixing the metal column head 4 of the sleeve outlet.

[0027] Furthermore, in this embodiment, to enhance the sealing effect, the transformer high-voltage bushing sealing structure in this embodiment also includes: a first sealing gasket A installed on the first assembly surface 318 and a second sealing gasket B installed on the second assembly surface 319, wherein the first sealing gasket A and the second sealing gasket B have a height difference.

[0028] In this embodiment, the height dimensions of the first sealing gasket A and the second sealing gasket B are set to be the same; the sleeve cap 3 is sealed and fitted onto the outside of the sleeve oil pillow shell 1, and simultaneously and uniformly compresses the first sealing gasket A and the second sealing gasket B, so that the compression amount of the first sealing gasket A and the second sealing gasket B is consistent.

[0029] The functions of the first sealing gasket A and the second sealing gasket B are to form a sealing surface between the casing oil conservator shell 1 and the casing cap 3, cut off the communication path between the casing oil conservator shell 1 and the external atmosphere, and achieve the casing sealing function.

[0030] In practice, the first sealing gasket A is an inner sealing structure and the second sealing gasket B is an outer sealing structure. Since the first sealing gasket A and the second sealing gasket B have a height difference, in this embodiment, the sealing position of the second sealing gasket B is lower than that of the first sealing gasket A. Even if the second sealing gasket B fails, external moisture will not invade and corrode the inner seal.

[0031] The purpose of setting the height of the first sealing gasket A and the second sealing gasket B to be the same is that, after the sleeve cap 3 is assembled for sealing, because the two sealing gaskets have the same depth, when the screws are tightened to secure the sleeve cap 3, the two sealing gaskets A and B will be subjected to uniform and synchronous force, maintaining a constant amount of compression, thus improving the sealing effect.

[0032] The transformer high-voltage bushing sealing structure in this embodiment has the following beneficial effects: The transformer high-voltage bushing sealing structure includes: a bushing oil conservator shell, the bushing oil conservator shell including: a bushing oil conservator shell body and an assembly protrusion extending from one end of the bushing oil conservator shell body; a bushing aluminum rod installed inside the bushing oil conservator shell, one end of the bushing aluminum rod extending out from the assembly protrusion; a bushing cap, the bushing cap having an assembly cavity inside, a threaded hole at the bottom of the assembly cavity, a first assembly surface in the assembly cavity, and a second assembly surface on the end side of the bushing cap; The bushing includes a metal outlet head, one end of which is fastened to a threaded hole in the bushing cap, and the other end of which is housed in the bushing aluminum rod. The bushing cap is sealed to the outside of the bushing oil tank housing, with the first mounting surface sealing against the end face of the mounting protrusion on the bushing oil tank housing body, and the second mounting surface sealing against the bushing oil tank housing body. This cuts off the path of communication between the bushing oil tank housing and the external atmosphere, thereby improving the moisture-proof and waterproof performance of the transformer high-voltage bushing. The structure is simple and reasonable, facilitating maintenance and repair.

Claims

1. A transformer high-voltage bushing sealing structure, characterized in that, include: A casing oil conservator housing, the casing oil conservator housing comprising: a casing oil conservator housing body and an assembly protrusion extending from one end of the casing oil conservator housing body; A casing aluminum rod is installed inside the casing oil conservator housing, with one end of the casing aluminum rod extending out from the assembly protrusion; A sleeve-shaped general's cap, wherein the sleeve-shaped general's cap has an internal mounting cavity, the bottom of the mounting cavity has a threaded hole, the mounting cavity has a first mounting surface, and the end side of the sleeve-shaped general's cap has a second mounting surface; and The bushing outlet metal post, wherein: One end of the bushing outlet metal post is fastened in the threaded hole in the bushing cap, and the other end of the bushing outlet metal post is accommodated in the bushing aluminum rod. The sleeve cap is sealed and fitted onto the outside of the sleeve oil conservator shell. The first mounting surface seals against the end face of the mounting protrusion on the sleeve oil conservator shell body, and the second mounting surface seals against the sleeve oil conservator shell body, thereby cutting off the communication path between the inside of the sleeve oil conservator shell and the outside atmosphere.

2. The transformer high-voltage bushing sealing structure as described in claim 1, characterized in that, Also includes: A first sealing gasket is installed on the first mounting surface and a second sealing gasket is installed on the second mounting surface, wherein the first sealing gasket and the second sealing gasket have a height difference.

3. The transformer high-voltage bushing sealing structure as described in claim 2, characterized in that, The height dimensions of the first sealing gasket and the second sealing gasket are set to be the same; The sleeve cap is fitted onto the outside of the sleeve oil conservator shell and simultaneously and evenly compresses the first sealing gasket and the second sealing gasket, so that the compression of the first sealing gasket and the second sealing gasket is consistent.

4. The transformer high-voltage bushing sealing structure as described in claim 1, characterized in that, Also includes: The transformer lead for current-carrying output is connected to the metal post of the bushing outlet, wherein: The ends of the transformer leads and the bushing outlet metal columns connected to the transformer leads are housed in the bushing aluminum rod.

5. The transformer high-voltage bushing sealing structure as described in claim 1, characterized in that, The casing oil conservator housing further includes: a casing outer sheath that is sealed and connected to one end of the casing oil conservator housing body, and one end of the casing aluminum rod is housed in the casing outer sheath.

6. The transformer high-voltage bushing sealing structure as described in claim 5, characterized in that, The outer sheath of the bushing and the outer shell of the bushing oil pillow are filled with insulating oil for soaking the bushing capacitor core.

7. The transformer high-voltage bushing sealing structure as described in claim 1, characterized in that, Also includes: A column head fixing pin, wherein: the column head fixing pin passes through the sleeve outlet metal column head and the sleeve aluminum rod for fastening, thereby limiting and fixing the sleeve outlet metal column head.

8. The transformer high-voltage bushing sealing structure as described in claim 1, characterized in that, The sleeve cap is a conductive current-carrying structure made of copper. The end of the metal column of the sleeve outlet is provided with an external thread that matches the threaded hole in the assembly cavity.

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