CN104167267A - Sealed ceramic insulator with wiring assembly - Google Patents

Abstract

The invention discloses a sealed ceramic insulator with a wiring assembly. The ceramic insulator is provided with a through hole along its central axis, a plurality of sheds are arranged on the outer wall of the middle part, and a radial protrusion is arranged on the outer wall of the lower part. The ring-shaped positioning boss; the outer wall of the lower part of the insulator is also provided with a plurality of positioning grooves extending along the axis direction, and each positioning groove is located below the ring-shaped positioning boss. The wiring assembly of the ceramic insulator includes a sealing gasket, a bolt and a rolling connection piece, and the bottom end of the rolling portion of the rolling connection piece is deformed by rolling and protrudes inwardly to form a rolling fastening ring. The structure of the invention is relatively reasonable and compact, and can effectively prevent the external metal base from slipping along the circumferential direction of the insulator, thereby ensuring its sealing performance.

Description

Hermetically sealed ceramic insulators with terminal assemblies

This application is a divisional application of an invention patent application with the application number 201210095874.0 and the application date is March 31, 2012, and the invention name is "a ceramic insulator for power capacitors".

technical field

The invention relates to the technical field of ceramic terminal structure design, in particular to a ceramic insulator used for power capacitors. the

Background technique

The ceramic insulators of high-voltage capacitors currently on the market use silver to weld the mounting part and ceramics together to make them firmly fixed on the ceramics. The cost of this product is high, the steps are cumbersome, and the processing time is long.

Traditional ceramic insulators need to weld metal wiring components and installation components with ceramic insulators. Due to the particularity of ceramics, special solder with silver alloy as the main component needs to be used. This solder is very expensive. At the same time, in order to ensure The firmness of the combination of the two also requires a relatively thick solder layer, and more materials are used, which leads to the high cost of this kind of insulator; in addition, in order to prepare this silver alloy into a viscous state that is easy to smear, it is necessary to use pollution Heavy acidic chemicals are not conducive to protecting the environment.

Patent application 200910131660.2 discloses a ceramic insulator device for high voltage capacitors. The ceramic insulator device disclosed in this patent adopts a new structure and replaces traditional silver alloy solder with ordinary low-priced tin alloy solder, thereby reducing the manufacturing cost.

During the follow-up R&D and trial production process, the applicant found that two semi-circular metal retaining rings are welded and fixed to the metal mounting seat, so as to ensure that the metal mounting seat is firmly fixed on the ceramic outer wall. This structure is feasible and can meet the requirements of the national Relevant standards, but the operation process of its processing and installation is relatively cumbersome, and it is necessary to use a special special fixture to clamp the metal retaining ring and the metal mounting seat, so that it can be welded smoothly.

In addition, when the metal mounting seat used in this kind of ceramic insulator device is subjected to a large force, it is easy to slip along the circumferential direction of the insulator, which affects the sealing performance.

Contents of the invention

The object of the present invention is to provide a sealed ceramic terminal with a terminal assembly which effectively prevents the metal base from slipping along the circumference of the insulator, thereby ensuring its sealing performance.

The technical solution to achieve the purpose of the present invention is: a ceramic insulator with a wiring assembly, which is provided with a through hole along its central axis, a plurality of sheds are provided on the outer wall of the middle part, and a radial protrusion is provided on the outer wall of the lower part. The ring-shaped positioning boss; the outer wall of the lower part of the insulator is also provided with a plurality of positioning grooves extending along the axis direction, and each positioning groove is located below the ring-shaped positioning boss.

The outer wall of the upper part of the ceramic insulator is provided with a ring-shaped rolling buckle, the top of the ceramic insulator is provided with a groove, and the through hole of the ceramic insulator is located at the center of the groove; the wiring assembly includes a sealing gasket, a bolt and a roller Compression connector; the center of the sealing gasket is provided with a through hole; the bolt includes a stud with an external thread area, and a positioning part located at one side of the stud; the positioning part of the bolt and the sealing gasket are located In the groove, and the sealing gasket is located between the bolt positioning part and the bottom wall of the groove; the rolling connection part includes a cover pressure part for crimping on the bolt positioning part, and is used for being sleeved on the ceramic insulator The sleeve part on the upper outer wall, and the rolling part used to be crimped on the ring-shaped rolling fastening part on the upper outer wall of the ceramic insulator by rolling, the center of the cover pressing part is provided with a through hole, and the bolt The stud passes through the through hole and is higher than the rolling connector; the bolt is also provided with a wiring hole passing through the stud and the positioning part along the central axis; the wiring hole, the through hole of the sealing gasket, the rolling The through hole of the cover pressure part of the connector and the through hole of the ceramic insulator are arranged concentrically; the shape of the groove and the bolt positioning part is a regular hexagon that matches; the bottom end of the rolling part of the rolling connector is rolled The compression deformation projects inwardly to form a rolled snap ring.

The invention has positive effects: (1) The structure of the invention is relatively reasonable and compact, and can effectively prevent the metal base from slipping along the circumference of the insulator, thereby ensuring its sealing performance.

Description of drawings

Fig. 1 is a kind of three-dimensional structure schematic diagram of ceramic insulator of the present invention;

Fig. 2 is a three-dimensional structural schematic view of the present invention after the wiring assembly is arranged on the ceramic insulator shown in Fig. 1 and the installation assembly is arranged;

Fig. 3 is an exploded schematic diagram of the terminal shown in Fig. 2, that is, after the mounting assembly is arranged on the present invention;

Fig. 4 is a cross-sectional view of the terminal shown in Fig. 2, that is, after the mounting assembly is arranged on the present invention;

Fig. 5 is a cross-sectional view of the ceramic insulator in the terminal shown in Fig. 2;

Fig. 6 is a cross-sectional view of the metal base in the terminal shown in Fig. 2;

Fig. 7 is a cross-sectional view of the base tube in the terminal shown in Fig. 2 .

Detailed ways

This specific embodiment is a ceramic insulator for power capacitors, as shown in Figure 1, the insulator 1 is provided with a through hole 11 along its central axis, a plurality of sheds 12 are arranged on the outer wall of the middle part, and a plurality of sheds 12 are arranged on the outer wall of the lower part An annular positioning boss 13 protruding in the radial direction is provided, and an annular rolling buckle joint 15 protruding in the radial direction is provided on the upper outer wall of the insulator 1 . Groove 16 , the through hole 11 of the ceramic insulator 1 is located at the center of the groove 16 .

In this specific embodiment, the outer wall of the lower part of the insulator 1 is further provided with a plurality of positioning grooves 17 extending along the axial direction, and each positioning groove 17 is located below the annular positioning boss 13 . The top of the positioning groove 17 is adjacent to the annular positioning boss 13 .

In this specific embodiment, a tubular metal base can be fixed on the ring-shaped positioning boss 13 by rolling, because during the rolling operation, it is easy to cause uneven rolling and then cause the base to loosen, and it is not easy to Repair can only be discarded as a whole; so in order to solve this phenomenon, an annular groove can also be set on the peripheral wall of the annular positioning boss 13. Rolling treatment is carried out on the base wall of the groove and a concave groove is formed thinking about the annular groove. Since the wall of the metal base is deformed under pressure, the uneven rolling can be deformed through this place. And become relatively neat, so that the metal base is more firmly buckled on the annular boss 13 .

Figures 2 to 7 show a specific application of the present invention, wherein Figure 2 is a schematic diagram of a three-dimensional structure of a terminal made of the insulator shown in Figure 1; Figure 3 is a schematic diagram of a terminal shown in Figure 2 Exploded schematic diagram; Figure 4 is a cross-sectional view of the terminal shown in Figure 2; Figure 5 is a cross-sectional view of the ceramic insulator in the terminal shown in Figure 2; Figure 6 is a metal base in the terminal shown in Figure 2 Cross-sectional view; FIG. 7 is a cross-sectional view of the base pipe in the terminal shown in FIG. 2 .

This specific application method is a ceramic terminal used for power capacitors, as shown in Figures 2 to 7, including a ceramic insulator 1, a wiring assembly 4 arranged on the top of the ceramic insulator 1 and a terminal assembly arranged on the ceramic insulator 1 The lower part of the installation assembly 2; the ceramic insulator 1 is provided with a through hole 11 along its central axis, a plurality of sheds 12 are provided on the middle outer wall of the insulator 1, and a radial direction is provided on the lower outer wall of the insulator 1 A protruding ring-shaped positioning boss 13 , and a plurality of positioning grooves 17 extending along the axis direction are provided on the lower outer wall of the insulator 1 , and each positioning groove 17 is located below the ring-shaped positioning boss 13 .

The installation assembly 2 includes a metal base 21, an annular sealing ring 22 and a base pipe 3; the annular sealing ring 22 is sleeved on the outer wall of the lower part of the insulator 1, and is arranged adjacent to the bottom wall 131 of the annular positioning boss; the metal The base 21 includes a crimping part 211 for pressing the annular sealing ring 22 on the bottom wall 131 of the annular positioning boss, a sleeve part 212 for being sleeved on the annular positioning boss 13, and a rolling The rolling ring 213 on the ring-shaped positioning boss top wall 132 is buckled in a pressing manner; the crimping part 211 of the metal base 21 is provided with a plurality of positioning bosses 215 matched with the positioning groove 17, and each positioning The boss 215 is located in a corresponding one of the positioning slots 17 .

The base pipe 3 includes a welded portion 31 for welding or glued connection with the base 21 , and a sleeve portion 32 integrally formed with the welded portion 31 .

The top wall of the welding part 31 of the base pipe 3 is a plane and the crimping part 211 of the metal base 21 is provided with a welding plane 100, the welding part 31 of the base tube 3 and the crimping part 211 of the metal base 21 Welding fixed connection.

The rolling ring 213 is formed by rolling the top end of the socket portion 212 of the base 21 inwardly.

The outer wall of the upper part of the ceramic insulator 1 is provided with an annular rolling fastening part 15, the top of the ceramic insulator 1 is provided with a groove 16, and the through hole 11 of the ceramic insulator 1 is located at the center of the groove 16; the wiring The assembly 4 includes a gasket 41, a bolt 42 and a rolling joint 43; the center of the gasket 41 is provided with a through hole 411; the bolt 42 includes a stud 421 provided with an external thread area, and a The positioning part 422 on one side of 421; the positioning part 422 of the bolt 42 and the sealing gasket 41 are located in the groove 16, and the sealing gasket 41 is located between the positioning part 422 of the bolt 42 and the bottom wall of the groove 16; The rolling connection part 43 includes a cover pressure part 431 for crimping on the positioning part 422 of the bolt 42, a sleeve part 432 for being sleeved on the upper outer wall of the ceramic insulator 1, and a crimping part for crimping by rolling. The rolling part 433 on the annular rolling fastening part 15 on the upper outer wall of the ceramic insulator 1 is provided with a through hole 434 at the center of the cover pressing part 431, and the stud 421 of the bolt 42 passes through the through hole 434 and Higher than the rolled connector 43 .

The bolt 42 is also provided with a wiring hole 423 passing through the stud 421 and the positioning part 422 along the central axis direction; The hole 434 and the through hole 11 of the ceramic insulator 1 are arranged concentrically.

The shape of the groove 16 and the positioning portion 422 of the bolt 42 is a regular polygon that matches, and a regular hexagon is selected in this embodiment.

The bottom end of the rolling portion 433 of the rolling connection member 43 is deformed by rolling to protrude inwardly to form a rolling fastening ring 435 .

Apparently, the above specific implementation manners of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (1)

1. have a closed type ceramic insulator for connector assembly, be provided with through hole (11) along self central axis, its middle part outer wall is provided with multiple full skirts (12), and its underpart outer wall is provided with a radially annular locating lug boss (13) for projection; It is characterized in that: on the outer wall of described insulator (1) bottom, be also provided with many location notchs (17) that extend along axis direction, each location notch (17) is positioned at described annular locating lug boss (13) below; Described ceramic insulator (1) external wall of upper portion is provided with annular roll extrusion snapping portion (15), and described ceramic insulator (1) top is provided with groove (16), and the through hole (11) of described ceramic insulator (1) is positioned at this groove (16) center; Connector assembly (4) comprises gasket seal (41), bolt (42) and roll extrusion connector (43); Described gasket seal (41) center is provided with open-work (411); Described bolt (42) comprises the double-screw bolt (421) that is provided with external screw thread district and the location division (422) that is positioned at double-screw bolt (421) one sides; Location division (422) and the gasket seal (41) of described bolt (42) are arranged in groove (16), and described gasket seal (41) is positioned between Bolt to position portion (422) and groove (16) diapire; Described roll extrusion connector (43) comprises for being crimped on lid splenium (431) in Bolt to position portion (422), for being set in socket part (432) in ceramic insulator (1) external wall of upper portion and for be crimped on the roll extrusion portion (433) in annular roll extrusion snapping portion (15) in ceramic insulator (1) external wall of upper portion by roll extrusion mode, described lid splenium (431) center is provided with open-work (434), and the double-screw bolt (421) of described bolt (42) is through this open-work (411) and exceed roll extrusion connector (43); Described bolt (42) is also provided with the wiring hole (423) that runs through double-screw bolt (421) and location division (422) along central axial direction; The open-work (411) of described wiring hole (423), gasket seal, the open-work (434) of roll extrusion connector lid splenium, the through hole (11) of ceramic insulator arrange with one heart; The shape of described groove (16) and Bolt to position portion (422) is the regular hexagon matching; The rolled distortion in bottom of the roll extrusion portion (433) of described roll extrusion connector (43) is to a roll extrusion snapping ring of projecting inward formation (435).