A new dry-type RIP AC transformer bushing terminal structure

Abstract

The invention relates to a novel dry-type RIP AC transformer bushing terminal structure, wherein the terminal structure is arranged at the end of an insulator bushing, an end cover is arranged at the end of the insulator bushing and connected to the insulator bushing by bolts, and a through hole for accommodating a one-time pass-through terminal is arranged on the end cover; the characteristic is that the terminal comprises a conductive tube and a one-time pass-through terminal; the one-time pass-through terminal has a simple pass-through structure, and an electrical connection with the one-time pass-through terminal is achieved by a spring contact finger, and the one-time pass-through terminal is fastened to the end cover by bolts; the structure has high electrical connection reliability, simple structure and low material cost; the problem of failure easily occurring in the manner of matching a general cap with a spring, resulting in unreliable electrical connection between the general cap and the conductive tube, increased contact resistance, and thus serious heating of the product is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of AC transformer bushings, and in particular to a novel dry-type RIP AC transformer bushing terminal structure. Background Art

[0002] The wiring terminals on the bushing of a general AC transformer adopt a general cap structure, such as Figure 1 As shown, when the AC transformer bushing uses a conductive tube current-carrying structure, if a general cap structure 1 is used, it needs to be coordinated with a pull rod structure. This type of structure is complex and requires a compression spring 2 to achieve a limiting effect. The spring 2 is in a compressed state for a long time and is prone to failure, resulting in unreliable electrical connection between the general cap structure 1 and the conductive tube, increased contact resistance, and severe heating of the product. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new dry-type RIP AC transformer bushing terminal structure, which can solve the problem that the general AC transformer bushing terminal adopts a general cap structure, resulting in unreliable electrical connection between the general cap and the conductive tube, increased contact resistance, and thus causing serious heating of the product.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a novel dry-type RIP AC transformer bushing terminal structure, the terminal structure is arranged at the end of the insulator bushing, the end of the insulator bushing is provided with an end cover plate connected to the insulator bushing by bolts, and the end cover plate is provided with a through hole for accommodating the one-way through terminal; its innovation lies in: comprising a conductive tube and a one-way through terminal;

[0005] The conductive tube is placed in the insulator sleeve, and the end of the conductive tube extends to the inner wall close to the end cover; the axis of the conductive tube is coaxial with the through hole on the end cover for accommodating the one-way connection terminal to pass through;

[0006] The one-time penetration terminal has a stepped shaft-like structure, one end of the one-time penetration terminal is embedded in the stepped hole of the conductive tube, a groove for accommodating a spring contact finger is circumferentially arranged on the outer wall of the one-time penetration terminal embedded in the conductive tube, and a spring contact finger is arranged in the groove; the other end of the one-time penetration terminal passes through the through hole on the end cover plate; a one-time penetration terminal pressure plate is welded at the stepped surface of the one-time penetration terminal perpendicular to the axial direction of the one-time penetration terminal, and the one-time penetration terminal pressure plate is connected to the end cover plate by bolts.

[0007] Furthermore, an insulator flange connected to the end cover is provided on the outer wall of the insulator sleeve, and the insulator flange and the end cover are connected by bolts; a first sealing groove is provided on the end cover at a fitting position with the insulator flange and a fitting position with the insulator sleeve, and a nitrile rubber ring is provided in the first sealing groove.

[0008] Furthermore, a second sealing groove is provided on the circumference of the outer wall of the one-way terminal embedded in the conductive tube, and a fluorosilicone sealing ring is provided in the second sealing groove.

[0009] Furthermore, a third sealing groove is provided on the fitting surface of the one-way terminal pressing plate and the end cover plate vertically welded on the one-way terminal, and a fluorosilicone sealing ring is provided in the third sealing groove; a fourth sealing groove is provided on the inner wall of the through hole on the end cover plate through which the one-way terminal passes, and a fluorosilicone sealing ring is provided in the fourth sealing groove.

[0010] The advantages of the present invention are:

[0011] 1) The one-way through terminal block of the present invention has a simple structure, and the electrical connection with the one-way through terminal block is achieved through spring contact fingers, and the one-way through terminal block is fastened to the end cover plate by bolts; the structure has high electrical connection reliability, simple structure, and low material cost; it avoids the problem that the general cap and the spring are matched, which is prone to failure, resulting in unreliable electrical connection between the general cap and the conductive tube, increased contact resistance, and thus causing serious heating of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of a conventional general cap type RIP AC transformer bushing terminal.

[0014] Figure 2 The present invention is a schematic diagram of a novel dry-type RIP AC transformer bushing terminal structure. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0019] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 2 A novel dry-type RIP AC transformer bushing terminal structure is shown, wherein the terminal structure is arranged at the end of an insulator bushing 3, an end cover plate 4 is arranged at the end of the insulator bushing 3 and connected to the insulator bushing 3 by bolts, and a through hole is arranged on the end cover plate 4 for accommodating a one-time pass-through terminal 5 to pass through; the terminal structure includes a conductive tube 6 and a one-time pass-through terminal 5.

[0022] The conductive tube 6 is placed in the insulator sleeve, and the end of the conductive tube 6 extends to the inner wall close to the end cover 4; the axis of the conductive tube 6 is coaxial with the through hole on the end cover 4 for accommodating the one-way terminal 5 to pass through.

[0023] The one-way terminal 5 has a stepped shaft-like structure, one end of the one-way terminal 5 is embedded in the stepped hole of the conductive tube 6, and a groove for accommodating a spring contact finger 7 is circumferentially arranged on the outer wall of the one-way terminal 5 embedded in the conductive tube 6, and a spring contact finger 7 is arranged in the groove; the other end of the one-way terminal 5 passes through the through hole on the end cover 4; a one-way terminal pressing plate 51 is welded at the stepped surface of the one-way terminal 5 perpendicular to the axial direction of the one-way terminal 5, and the one-way terminal pressing plate 51 is connected to the end cover 4 by bolts.

[0024] An insulator flange 31 connected to the end cover 3 is arranged on the outer wall of the insulator sleeve 3, and the insulator flange 31 and the end cover 3 are connected by bolts; a first sealing groove is opened at the fitting position of the end cover 3 with the insulator flange 31 and the fitting position with the insulator sleeve 3, and a nitrile rubber ring is arranged in the first sealing groove.

[0025] A second sealing groove is provided on the circumference of the outer wall of the portion of the primary pass-through terminal 5 embedded in the conductive tube, and a fluorosilicone sealing ring is provided in the second sealing groove.

[0026] A third sealing groove is provided on the fitting surface between the one-way terminal pressing plate 51 vertically welded on the one-way terminal 5 and the end cover plate, and a fluorosilicone sealing ring is provided in the third sealing groove; a fourth sealing groove is provided on the inner wall of the through hole on the end cover plate 4 through which the one-way terminal 5 passes, and a fluorosilicone sealing ring is provided in the fourth sealing groove.

[0027] The working principle of the invention is: the spring contact finger is electrically connected with the one-way wiring terminal, the one-way wiring terminal is circumferentially welded, and the one-way wiring terminal pressing plate is fastened to the end cover plate by bolts.

[0028] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dry-type RIP AC transformer bushing terminal structure, the terminal structure is arranged at the end of the insulator bushing, the end of the insulator bushing is provided with an end cover plate connected to the insulator bushing by bolts, and the end cover plate is provided with a through hole for accommodating the one-time passing terminal; characterized in that: It includes a conductive tube and a one-way connection terminal; The conductive tube is placed in the insulator sleeve, and the end of the conductive tube extends to the inner wall close to the end cover; the axis of the conductive tube is the same as the axis of the through hole on the end cover for accommodating the one-way connection terminal; The one-time penetration terminal has a stepped shaft-like structure, one end of the one-time penetration terminal is embedded in the stepped hole of the conductive tube, a groove for accommodating a spring contact finger is circumferentially arranged on the outer wall of the one-time penetration terminal embedded in the conductive tube, and a spring contact finger is arranged in the groove; the other end of the one-time penetration terminal passes through the through hole on the end cover plate; a one-time penetration terminal pressure plate is welded at the stepped surface of the one-time penetration terminal perpendicular to the axial direction of the one-time penetration terminal, and the one-time penetration terminal pressure plate is connected to the end cover plate by bolts.

2. A dry-type RIP AC transformer bushing terminal structure according to claim 1, characterized in that: An insulator flange connected to the end cover is arranged on the outer wall of the insulator sleeve, and the insulator flange and the end cover are connected by bolts; a first sealing groove is opened on the end cover at the fitting position with the insulator flange and the fitting position with the insulator sleeve, and a nitrile rubber ring is arranged in the first sealing groove.

3. A dry-type RIP AC transformer bushing terminal structure according to claim 1, characterized in that: A second sealing groove is arranged on the circumference of the outer wall of the one-way connection terminal which is embedded in the conductive tube, and a fluorosilicone sealing ring is arranged in the second sealing groove.

4. A dry-type RIP AC transformer bushing terminal structure according to claim 1, characterized in that: A third sealing groove is provided on the fitting surface of the one-way terminal pressing plate and the end cover plate vertically welded on the one-way terminal, and a fluorosilicone sealing ring is provided in the third sealing groove; a fourth sealing groove is provided on the inner wall of the through hole through which the one-way terminal passes on the end cover, and a fluorosilicone sealing ring is provided in the fourth sealing groove.

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