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CN-121986423-A - Gas-tight joint for gas-insulated medium-or high-voltage equipment

CN121986423ACN 121986423 ACN121986423 ACN 121986423ACN-121986423-A

Abstract

The present disclosure relates to a gas tight joint (1) for a gas insulated medium or high voltage apparatus, the apparatus and a method of manufacturing and assembling a gas tight joint. The gas-tight joint (1) comprises a conductor (2), the conductor (2) comprising a first and a second conductor part (2 a,2 b) arranged to pivot with respect to each other about a common central pivot point (r), a housing (3), the housing (3) comprising a first and a second housing part (3 a,3 b) arranged to pivot with respect to each other about the common central pivot point (r), and a sealing mechanism (4), the sealing mechanism (4) being arranged between the first and the second housing part (3 a,3 b) and providing a seal between the two such that a gas leakage path (L) between the first and the second housing part (3 a,3 b) is sealed in a gas-tight manner in a plurality of possible orientations between the first and the second housing part (3 a,3 b).

Inventors

  • WALTER HORACE
  • Uls Vescoli
  • Raphael L v ti

Assignees

  • 希沃杜克公司

Dates

Publication Date
20260505
Application Date
20240917
Priority Date
20230925

Claims (15)

  1. 1. A gas tight joint (1) for a gas insulated medium or high voltage apparatus (100), comprising: a. -a conductor (2), said conductor (2) comprising a first conductor part (2 a) and a second conductor part (2 b) pivotally arranged to each other about a common central pivot point (r); b. A housing (3) radially surrounding the conductor (2), the housing (3) comprising a first housing part (3 a) and a second housing part (3 b) pivotally arranged to each other about the common central pivot point (r), and C. -a sealing mechanism (4) arranged between the first housing part (3 a) and the second housing part (3 b), wherein the sealing mechanism (4) provides a seal between the first housing part (3 a) and the second housing part (3 b) such that a gas leakage path (L) between the first housing part (3 a) and the second housing part (3 b) is sealed in a gastight manner in a plurality of possible orientations between the first housing part (3 a) and the second housing part (3 b).
  2. 2. The gas-tight joint (1) according to claim 1, wherein the gas-tight joint (1) comprises a first spacer (5 a), the first spacer (5 a) connecting the first conductor part (2 a) with the first housing part (3 a) and enabling synchronous movement of the first conductor part (2 a) and the first housing part (3 a), and/or wherein the gas-tight joint (1) comprises a second spacer (5 b), the second spacer (5 b) connecting the second conductor part (2 b) with the second housing part (3 b) and enabling synchronous movement of the second conductor part (2 b) and the second housing part (3 b).
  3. 3. The gas-tight joint (1) according to any one of the preceding claims, wherein the first conductor portion (2 a) and/or the second conductor portion (b) comprises an arc-shaped contact surface (20), in particular a spherical contact surface (20), in contact with the respective other conductor portion (2 a, 2 b), such that a current transmission is achieved in a plurality of orientations between the first conductor portion (2 a) and the second conductor portion (2 b), in particular by means of at least one conductor current transmission element (7).
  4. 4. The gas-tight joint (1) according to any one of the preceding claims, wherein the first conductor part (2 a) or the second conductor part (2 b) comprises a cavity (23), which cavity (23) extends axially into the respective conductor part (2 a,2 b) and has a hollow cylindrical shape, wherein the other conductor part (2 a,2 b) comprises an axially extending cylindrical pin-like protrusion (24) arranged at least partly inside the cavity (23), which axially extending cylindrical pin-like protrusion (24) comprises an arc-shaped contact surface (241), in particular a spherical contact surface (241), in contact with an inner wall of the cavity (23), such that a current transmission is achieved in a plurality of orientations between the first conductor part (2 a) and the second conductor part (2 b).
  5. 5. The gas-tight joint (1) according to claim 4, wherein the conductor part (2 b) comprising the cavity (23) has an arc-shaped outer surface (21), in particular a spherical outer surface (21), the conductor part (2 a) comprising the protrusion (24) has a matching arc-shaped inner surface (22), in particular a matching spherical inner surface (22), extending along the outer surface (21), in particular wherein the centre point of the outer surface (21) and the centre point of the inner surface (22) are located at the common centre pivot point (r) such that a mechanically guiding contact is formed in a plurality of orientations between the first conductor part (2 a) and the second conductor part (2 b).
  6. 6. The gas-tight joint (1) according to any of the preceding claims, wherein the first housing part (3 a) and/or the second housing part (3 b) comprises an arc-shaped contact surface (30), in particular a spherical contact surface (30), in contact with the respective other housing part (3 a, 3 b), such that a gas-tight seal is achieved between the first housing part (3 a) and the second housing part (3 b) in various orientations between the first housing part (3 a) and the second housing part (3 b).
  7. 7. The gas-tight joint (1) according to any of the preceding claims, wherein the gas-tight joint (1) comprises a connection mechanism (6), the connection mechanism (6) at least partly surrounding the first housing part (3 a) and the second housing part (3 b) and connecting the first housing part (3 a) with the second housing part (3 b) such that the first housing part (3 a) and the second housing part (3 b) can be gas-tightly connected in a plurality of orientations between the first housing part (3 a) and the second housing part (3 b).
  8. 8. The gas-tight joint (1) according to claim 7, wherein the connection mechanism (6) comprises a connection sleeve (62) and a connection bracket (61), wherein the connection sleeve (62) is engaged with the first housing part (3 a), and wherein the connection bracket (61) is engaged with the second housing part (3 b) and with the connection sleeve (62) for connecting the first housing part (3 a) with the second housing part (3 b).
  9. 9. The gas-tight joint (1) according to claim 8, wherein the connecting sleeve (62) at least partly encloses the first housing part (3 a) and has a minimum radial dimension which is smaller than the maximum radial dimension of the first housing part (3 a), so that a form fit is formed between the connecting sleeve (62) and the first housing part (3 a) in one axial direction.
  10. 10. The gas-tight joint (1) according to any one of the preceding claims, wherein the conductor (2) comprises at least one conductor current-transmitting element (7), the conductor current-transmitting element (7) being arranged between the first conductor part (2 a) and the second conductor part (2 b), preferably in contact with the spherical contact surface (20), the conductor current-transmitting element (7) being configured to effect a current transmission between the first conductor part (2 a) and the second conductor part (2 b) in any possible orientation between the first conductor part (2 a) and the second conductor part (2 b).
  11. 11. The gas-tight joint (1) according to any of the preceding claims, wherein the housing (3) comprises at least one housing current transmission element (8), the housing current transmission element (8) being arranged between the first housing part (3 a) and the second housing part (3 b) and being configured to enable a current transmission between the first housing part (3 a) and the second housing part (3 b) in any possible orientation between the first housing part (3 a) and the second housing part (3 b).
  12. 12. The gas-tight joint (1) according to any of the preceding claims, wherein the sealing means (4) comprises one or more sealing rings (40), preferably O-rings or X-rings, each sealing ring (40) being arranged in a respective sealing recess (41) on the first housing part (3 a) or the second housing part (3 b), together constituting the sealing means (4).
  13. 13. A gas tight apparatus (100) for gas insulated medium or high voltage apparatus comprising a gas tight joint (1) according to any of the preceding claims.
  14. 14. The gas-tight device (100) according to claim 13, further comprising a first housing tube (101) and a second housing tube (102), the first housing tube (101) being connected to the first housing part (3 a) and the second housing tube (102) being connected to the second housing part (3 b).
  15. 15. Method of assembling a gas tight joint (1) for a gas insulated medium or high voltage apparatus, in particular a gas tight joint (1) according to any of the preceding claims 1 to 12, comprising the steps of: a. -arranging a first conductor part (2 a) and a second conductor part (2 b) pivoted to each other about a common central pivot point (r); b. -arranging a first housing part (3 a) and a second housing part (3 b) which pivot with respect to each other about said common central pivot point (r); c. positioning the first conductor part (2 a) and the first housing part (3 a) in a desired orientation relative to the second conductor part (2 b) and the second housing part (3 b), and D. A connecting means (6) is arranged at least partially surrounding the first housing part (3 a) and the second housing part (3 b) for connecting, in particular rigidly connecting, the first housing part (3 a) to the second housing part (3 b).

Description

Gas-tight joint for gas-insulated medium-or high-voltage equipment Technical Field The present disclosure relates to the field of high and medium voltage Gas Insulated Switchgear (GIS), gas insulated bus bars and Gas Insulated Lines (GIL), and discloses a compact and pivotable joint design comprised in a gas tight housing tube, which provides the possibility of a free angular orientation of the connecting tube and at the same time a gas tight seal for the pressurized insulating gas comprised therein. The present disclosure further relates to a gas-insulated medium or high voltage apparatus comprising the joint, and to a method for manufacturing and assembling a gas-insulated medium or high voltage apparatus joint, the apparatus comprising a joint. Background The gas-insulated switchgear and the gas-insulated line are assembled from several to hundreds of components, including a plurality of interconnected bus-bars. Each component has its own housing which is connected to an adjacent housing by a flange. The flange connection must ensure mechanical stability, tightness and galvanic conduction of the housing, so that the flanges are usually pressed against one another by high pressure, which is applied by a plurality of screw or screw connections distributed over the circumference of the flange. The screw connection may be a screw-nut connection, or the screw may mate with threads in a mating flange, or may be a bolt with a double nut. The screws and bolts are all arranged in corresponding holes in the flange. It is necessary to provide sufficient operating space for the bolts or screws on both sides of the flange for fastening. Because the shell is used as the pressure vessel, the pressure vessel is suitable for strict pressure vessel standards and detection, and the standards and detection requirements of different countries are different. A second known method for connecting housings, in particular for high-pressure gas-insulated lines, is to weld them together. The shell ends are machined to form welds and welded in the field to form long bus bars or lines. When the thin-wall aluminum pipe is welded on a construction site, a specific girth welding process is needed to realize airtight and mechanical rigid connection in a construction environment. The welded pipe cannot be disassembled in the event of failure or maintenance. The insulating spacers used to concentrically fix the center conductor inside the housing tube must be specially designed to fit the welded housing because the welded connection has no typical clearance to accommodate the spacers between the bolted flanges. In the known design, the flanges have a plane perpendicular to the housing axis and are provided with seals compressed axially between the flanges. All flanges known do not provide any form of angular adjustability. Disclosure of Invention It is therefore an object of the present disclosure to provide a gas tight joint for gas insulated medium or high voltage equipment, in particular solving the drawbacks of conventional designs, in particular conventional housings or flanges. In particular, it is an object of the present disclosure to provide an improved gas-tight joint for gas-insulated medium-or high-voltage equipment, which joint is compact, easy to disassemble and/or capable of achieving a free angular orientation between at least part of the components of the gas-tight housing of the gas-insulated medium-or high-voltage equipment. Other aspects of the present disclosure also relate to a gas-insulated medium or high voltage apparatus including the gas-tight joint, and a method for manufacturing and assembling the gas-tight joint. These objects are achieved by the subject matter of the independent claims, further advantageous embodiments and examples being described in connection with the dependent claims, the description and the drawings. In accordance with the present disclosure, a gas tight joint for a gas insulated medium or high voltage apparatus is specifically described, the gas tight joint preferably comprising a conductor comprising a first conductor portion and a second conductor portion pivotally arranged to each other about a common central pivot point. In other words, the first conductor portion and the second conductor portion may be arranged at any possible angular orientation relative to each other, preferably within a defined range. The present disclosure may enable an angular orientation of the first conductor portion relative to the second conductor portion without affecting current transfer from the first conductor portion to the second conductor portion. In other words, the current transfer can be achieved in any possible orientation. In any possible orientation, the first conductor portion may directly or indirectly contact the second conductor portion to achieve the desired current transfer. The gas-tight joint may further comprise a housing radially surrounding the conductor, in particular the first and s