One-piece shield produced by tension-compression deformation molding

Abstract

The invention relates to a one-piece shield of a tubular insulator for high-voltage technology, which is produced by tension-compression deformation. The one-piece shield according to the invention saves the manufacturing process required to connect them together by brazing or fusion welding compared to conventional multi-piece shields.

Description

Technical Field

[0001] The invention relates to a shielding element for an insulator for high voltage technology. Background Art

[0002] In a vacuum switching tube, the insulating section can consist of a plurality of insulators connected to each other. The insulators are connected to each other by means of a metal layer on the end side. The metal layer is conductive and shielded. In addition, the insulator can also be connected to a metal part. The contact area is also shielded.

[0003] The shield consists of a flat cylindrical area, to the top and bottom of which the insulator is attached at its ends. The shield is extended in the axial direction at the edge of the cylindrical area. This forms a thin cylinder or cone, at the ends of which the torus structure or part of the torus structure is present.

[0004] The shield must act both in the positive and negative axial directions. Therefore, the shield must act along the axis of the first insulator and also along the axis of the second insulator. The shield is usually produced by stretching and compression forming. The shield has been produced from a plurality of parts that have to be connected to each other. This can be achieved by brazing or welding. Summary of the invention

[0005] The object of the present invention is to provide a shield for an insulating body in high-voltage technology which requires less effort than conventional shields.

[0006] The above-mentioned object is achieved by a shield having the features of claim 1 .

[0007] Compared with the traditional multi-piece shield, the one-piece shield according to the present invention saves the manufacturing process required to connect them by brazing or welding. The risk of unsuccessful closure welding is also eliminated by eliminating the connection point.

[0008] Advantageous developments of the invention are specified in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be described in more detail below as an embodiment in the scope necessary for understanding based on the accompanying drawings. In the accompanying drawings:

[0010] Figure 1 shows a shield according to the invention between two insulators,

[0011] Figure 2 shows a shield according to the invention between an insulator and a metal part, and

[0012] Figure 3 A conventional two-piece shield is shown.

[0013] In the drawings, like reference numerals denote like elements. DETAILED DESCRIPTION

[0014] exist Figure 3 The conventional shielding member shown in the two-piece design provides for a first shielding member S1 having a flat annular section FA1. At the inner edge of section FA1, the shielding member is extended in the direction of axis A by a conical section K1. The end of the conical section K1 facing axis A is connected to the annular structure T1 or a part of the annular structure T1, so that the cross-section of the shielding member S1 is approximately in the shape of a question mark "?", and the annular structure T1 does not intersect the plane of section FA1. The first shielding member S1 and the identical second shielding member S2 are connected to each other in reverse at their sections FA1 and FA2, which can be achieved, for example, by brazing or welding. The tubular insulator I1 or I2 is connected to the surface of sections FA1 and FA2 that faces away from the connection.

[0015] exist Figure 1 The shield according to the present invention, which is designed in one piece, provides a shield S having a flat annular section FA. At the inner edge of the section FA, the shield is extended in the direction of the axis A with a conical section K. The end of the conical section K facing the axis A is connected to a first curved surface GF1 curved toward the plane of the section FA, the first curved surface GF1 is curved around the axis A and has a circular arc segment shape in the cross section, and a tubular section RA with a substantially constant diameter is formed on the first curved surface. A second curved surface GF2 curved toward the plane of the section FA is formed on the tubular section RA, the second curved surface is curved around the axis A and has a circular arc segment shape in the cross section. The free end of the second curved surface GF2 faces the flat annular section FA, so that an open gap SP is left. The conical section K, the first curved surface GF1, the tubular section RA and the second curved surface GF2 constitute an incompletely closed annular structure with a gap SP in the circumferential direction, wherein the annular structure extends above and below the plane of the section FA. The axis A of the tubular section RA intersects the plane of the section FA at right angles. The plane of the section FA intersects the tubular section RA perpendicularly. The end sides of the tubular insulators I1 or I2 arranged concentrically with respect to the axis A are connected to the upper side and the bottom side of the section FA.

[0016] Figure 2 The shielding member according to the present invention is a one-piece shielding member S, which is Figure 1 The shielding member S is the same. A tubular insulator I and a metal part MT arranged concentrically with respect to the axis A are connected to the upper side and the bottom side of the section FA. The metal part MT has a smaller wall thickness than the insulator I.

[0017] The gap SP in the circumferential direction in the annular structure of the shield S is arranged facing the metal component MT.

[0018] The shielding member S according to the present invention is manufactured by a component, such as a thin metal sheet, through tensile and compression deformation forming. In the first deformation forming step, a first toroidal structure GF1 is manufactured, but the first toroidal structure is also a part of the toroidal structure. In a further deformation forming step, a second toroidal structure GF2 is manufactured, but the second toroidal structure is also a part of the toroidal structure.

[0019] For the purpose of illustration, the present invention has been described in detail according to specific embodiments. The elements of the various embodiments may also be combined with each other. Therefore, the present invention should not be limited to the various embodiments, but only to the appended claims.

[0020] Reference numerals list

[0021] ACentral axis

[0022] AB distance

[0023] FA1 Flat section of shield S1

[0024] FA2 Flat section of shield S2

[0025] GF1 First curved surface

[0026] GF2 Second curved surface

[0027] K1 First conical section

[0028] K2 Second cone section

[0029] I Insulator

[0030] I1 First Insulator

[0031] I2 Second Insulator

[0032] MT Metal Parts

[0033] RA Tubular segment

[0034] S shielding, English: shielding

[0035] 51 First shielding, English: shielding

[0036] 52 second shielding, English: shielding

[0037] SP Gap

[0038] T1 Torus Structure 1

[0039] T2 Torus Structure 2

[0040] +Positive direction of axis A

[0041] - Negative direction of axis A

Claims

1. A shield for an insulator for high voltage technology, the shield comprising: - a flat annular segment (FA) concentric with respect to the axis (A), a conical section (K) formed at the inner edge of said section (FA), said conical section being inclined towards the axis (A) in the positive direction (+) of the axis (A), a first curved surface (GF1) formed at the end of the conical section (K), the first curved surface being curved along the negative direction of the axis (A) and towards the axis (A), the first curved surface being curved concentrically around the axis (A) and having a circular segment-shaped shape in cross section, a tubular section (RA) formed concentrically with respect to the axis (A) at the end of said first curved surface (GF1) facing the axis (A), said tubular section having a substantially constant radius with respect to the axis (A), a second curved surface (GF2) formed at the end of the tubular section (RA) oriented in the negative direction (-) of the axis (A), the second curved surface being curved in the positive direction (+) of the axis (A) and towards the inner edge of the section (FA), the second curved surface being curved concentrically around the axis (A) and having a circular segment-shaped shape in cross section, - starting from the axis (A), the radius of the free end of the curved surface (GF2) is smaller than the radius of the inner edge of the segment (FA), - the free end of the curved surface (GF2) is at a distance (AB) from the plane of the segment (FA) along the negative direction (-) of the axis (A), and - The plane of the section (FA) intersects the tubular section (RA) at right angles.

2. The shielding element according to claim 1, characterized in that The flat annular section (FA) cooperates with the end face of the insulating body (I).

3. Shielding element according to one of the preceding claims, characterized in that The flat annular section (FA) cooperates with the end face of the tubular metal component (MT).

4. Shielding element according to one of the preceding claims, characterized in that The shielding element is manufactured from a thin metal plate by means of tensile and compressive deformation.

5. The shielding member according to claim 1, characterized in that The first curved surface (GF1) is produced in a first deformation molding step, and the second curved surface (GF2) is produced in a second deformation molding step.

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