Overvoltage arrester device

Abstract

The invention relates to a surge arrester arrangement (1). The surge arrester arrangement (1) comprises: an arrester column (17); a housing (3), in which the arrester column (17) is arranged, and which has a housing wall (19), which surrounds the arrester column (17) at a distance from the arrester column (17); and a bearing device (21) which is connected to the arrester column (17) and the housing wall (19) and supports the arrester column (17) on the housing wall (19).

Description

Technical Field

[0001] This invention relates to an overvoltage discharger device. Background Technology

[0002] Overvoltage dischargers are designed to limit overvoltages that may occur, for example, during a lightning strike. For this purpose, an overvoltage discharger is constructed as a stack of discharger columns with variable resistor elements. To provide sufficient overvoltage protection, such discharger columns may be implemented as very long, for example, up to several meters, and correspondingly as very heavy, thus requiring support.

[0003] In particular, overvoltage dischargers used in gas-insulated applications are often housed in enclosures that may be correspondingly long and heavy. In such overvoltage discharger devices, the discharger column must be reliably placed mechanically within the enclosure while taking into account all design-related mechanical loads. Due to manufacturing tolerances and construction methods of the discharger column, radial tolerances, such as those caused by column tilting, and axial tolerances, such as the length tolerance of the discharger column, must be considered when installing it into the enclosure. Therefore, due to the length of the discharger column, axial and radial compensations are typically required to securely position the discharger column in its mounting location.

[0004] WO 2022 / 073722 A1 discloses a conductor device having an electrical conductor, an overvoltage discharger, and an electrically insulating support. The support is arranged between the overvoltage discharger and the electrical conductor in the longitudinal direction of the overvoltage discharger. The support is supported by the electrical conductor, and the overvoltage discharger is supported by the support. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an overvoltage discharger device with a discharger column, which can be implemented as relatively long and therefore must be properly supported.

[0006] According to the present invention, the above-mentioned technical problem is solved by an overvoltage discharger device having the features of claim 1.

[0007] Advantageous designs of the present invention are the subject of the dependent claims.

[0008] The overvoltage discharger device according to the present invention comprises:

[0009] - Discharger column,

[0010] - A housing, in which discharger columns are arranged, and the housing having a housing wall that surrounds the discharger columns in a manner spaced apart from them; and

[0011] - A support device connected to the discharger column and the housing wall, which supports the discharger column on the housing wall.

[0012] The statement "an overvoltage discharger device includes a discharger column" should not be construed as meaning that the overvoltage discharger device has only one discharger column. Rather, an overvoltage discharger device may have multiple discharger columns. Therefore, this statement should be understood as meaning that the overvoltage discharger device has at least one discharger column. An embodiment of an overvoltage discharger device according to the invention, having multiple discharger columns, is shown in the accompanying drawings.

[0013] In other words, the overvoltage discharger device according to the invention has a discharger column arranged in a housing. Thus, by implementing a fluid-tight housing, the overvoltage discharger device can be implemented, in particular, as a gas-insulated device. The discharger column is supported by a support device on the housing wall of the overvoltage discharger device housing, wherein the housing wall surrounds the discharger column in a manner spaced apart from it. Thus, the discharger column can be laterally supported on the housing wall in a manner electrically insulated from the housing wall by the support device, thereby preventing damage due to external forces and / or deflection or tilting of the discharger column due to its own weight.

[0014] In one embodiment of the invention, the support device has a coupling element arranged between a first segment and a second segment of the discharger column. The discharger column is coupled to the support device via the coupling element. For this purpose, the coupling element is arranged between two segments of the discharger column that are respectively in close contact with the coupling element. When the overvoltage discharger device has multiple discharger columns, for each discharger column, the support device may have a coupling element arranged between two segments of the discharger column.

[0015] In another embodiment of the invention, the overvoltage discharger device has a connecting element that connects the first column segment and the second column segment to each other and is guided through a coupling element groove in a coupling element, wherein the coupling element groove has a diameter larger than that of the connecting element.

[0016] The statement "the overvoltage discharger device has such a connecting element" should not be interpreted as the overvoltage discharger device having only one such connecting element. Rather, the overvoltage discharger device can have multiple such connecting elements. Therefore, this statement should be understood as the overvoltage discharger device having at least one such connecting element. When the overvoltage discharger device has multiple discharger columns, and each of these discharger columns has a coupling element, the overvoltage discharger device can have at least one such connecting element for each discharger column. Each of these connecting elements connects two segments of the discharger column and is guided through a coupling element groove arranged between the segments. Here, the coupling element groove has a diameter larger than that of the connecting element. This allows the coupling element to move relative to the discharger column when connecting the segments, for example, to compensate for radial tolerances or tilt of the discharger column. The connecting element is, for example, a screw.

[0017] In another embodiment of the invention, the support device has a bearing element with a bearing groove in which a coupling element is arranged. When the overvoltage discharger device has multiple discharger columns, and each of these discharger columns has a coupling element, the bearing element may have a bearing groove for each coupling element. The bearing groove in the bearing element can fix and position the coupling element so that it is associated with the discharger column respectively.

[0018] In another embodiment of the invention, the support device has a slip ring that fits tightly against the edge of the bearing groove and the coupling element, allowing the coupling element to slide relative to the bearing element along the longitudinal axis of the discharger column. When the overvoltage discharger device has multiple discharger columns, each with a coupling element, the support device may have a slip ring for each coupling element, fitting tightly against the edge of the bearing groove in which the coupling element is arranged and the coupling element, allowing the coupling element to slide relative to the bearing element along the longitudinal axis of the discharger column to which it is connected. The slip ring secures the coupling element in the bearing groove and allows axial manufacturing tolerances to be compensated when connecting the column segments of the discharger column.

[0019] In another embodiment of the invention, the support device has multiple support units, each of which connects the housing wall and the load-bearing element to each other. By connecting the load-bearing element to the housing wall using multiple support units, the load-bearing element can be safely and stably supported on the housing wall.

[0020] In another embodiment of the invention, for each support unit, the housing wall has a housing wall opening through which the support unit is guided. Thus, by guiding each support unit through the housing wall opening, the installation of the overvoltage discharger device can be simplified.

[0021] In another embodiment of the invention, each support unit is connected to the housing wall via a support flange connector. For example, each support flange connector between the housing wall and the support unit has a wall flange arranged on the outer side of the housing wall and a corresponding support flange for the support unit. This support flange connector allows the support unit to be securely fixed to the housing wall from the outside, and therefore with ease of installation. Furthermore, this support flange connector enables a fluid-tight connection between the support unit and the housing wall.

[0022] In another embodiment of the invention, each support unit is connected to the load-bearing element via a detachable connector. This detachable connector preferably has a gap in a direction parallel to the longitudinal axis of the support unit. This enables modular installation of the support units, in which the load-bearing element is connected to the support units, for example, after the support units are secured to the housing wall. The gap in the direction parallel to the longitudinal axis of the support unit between the detachable connector and the load-bearing element advantageously allows the load-bearing element to move relative to the support unit when connected to it, compensating for radial tolerances.

[0023] In another embodiment of the invention, the housing has a first housing portion and a second housing portion. For example, the first housing portion and the second housing portion are connected to each other in a region extending in a ring around the longitudinal axis of the discharger column.

[0024] The statement "the shell has a first shell portion and a second shell portion" should not be interpreted as meaning that the shell has only two shell portions. On the contrary, the shell may have more than two shell portions. Therefore, this statement should be understood as meaning that the shell has at least two shell portions.

[0025] As described above, the present invention relates to an overvoltage discharger device that can have a relatively long discharger column, and therefore a correspondingly large housing. This housing can, for example, be several meters high. When installing the overvoltage discharger device, the housing is typically hoisted above the discharger column. This usually requires a crane, and sufficient height is needed when installing the overvoltage discharger device in a building. The design of the present invention greatly simplifies the transport and installation of the housing by dividing it into two housing parts. The connection of the housing parts in the region extending in a ring around the longitudinal axis of the discharger column, for example, simplifies the fluid-tight connection of the housing parts and the connection between the support device according to the invention and the housing wall, compared to the connection of the housing parts in the plane in which the longitudinal axis of the discharger column extends.

[0026] In another embodiment of the invention, the first housing portion and the second housing portion are connected to each other in a fluid-tight manner. This fluid-tight connection of the housing portions particularly enables the implementation of gas insulation for the overvoltage discharger device.

[0027] In another embodiment of the invention, the first housing portion and the second housing portion are detachably connected to each other. For example, compared to a welded connection, the detachable connection of the housing portions simplifies the installation and removal of the overvoltage discharger device.

[0028] In another embodiment of the invention, the first housing portion and the second housing portion are connected to each other via a housing flange connector. The housing flange connector is preferably located on the outside of the housing.

[0029] The housing flange connections, in particular, enable easy fluid-tight and detachable connections of the housing portion. Positioning the housing flange connections on the outside of the housing simplifies the gripping of the housing flange connections during the installation and removal of the overvoltage discharger device, compared to arranging them on the inside of the housing. Attached Figure Description

[0030] The features, characteristics, advantages, and implementations of the present invention described above will become clearer and more readily understood in conjunction with the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. Herein, in the drawings:

[0031] Figure 1 The appearance of an embodiment of the overvoltage discharger device is shown.

[0032] Figure 2 The area showing the housing flange connection is shown. Figure 1 The diagram shows a cross-sectional view of the overvoltage discharger device.

[0033] Figure 3 The housing of the overvoltage discharger device is shown. Figure 1 The support device for the overvoltage discharger shown is...

[0034] Figure 4 It shows Figure 1 The load-bearing element of the overvoltage discharger device shown is

[0035] Figure 5 It shows Figure 1 The support unit of the overvoltage discharger device shown is

[0036] Figure 6 It shows Figure 1 The connection between the support unit and the load-bearing element of the overvoltage discharger device shown.

[0037] In the accompanying drawings, corresponding parts are given the same reference numerals. Detailed Implementation

[0038] Figure 1 (Appendix) Figure 1 The image shows the appearance of an embodiment of the overvoltage discharger device 1. The overvoltage discharger device 1 has a housing 3, which has a first housing portion 5 and a second housing portion 7. The first housing portion 5 and the second housing portion 7 are fluid-tight and are detachably connected to each other via housing flange connectors 9.

[0039] Figure 2 (Appendix) Figure 2 The area of ​​the housing flange connection 9 is shown. Figure 1 The diagram shows a cross-sectional view of the overvoltage discharger device 1. The housing flange connector 9 has a first connecting flange 11 and a second connecting flange 13. The first connecting flange 11 forms the end of the first housing portion 5 facing the second housing portion 7. The second connecting flange 13 forms the end of the second housing portion 7 facing the first housing portion 5. A sealing element 15 is arranged between the first connecting flange 11 and the second connecting flange 13, which seals the connection between the connecting flanges 11 and 13 in a fluid-tight manner. For example, the sealing element 15 is configured as a so-called O-ring.

[0040] The overvoltage discharger device 1 has a plurality of discharger columns 17 (four in the embodiment shown here) arranged in the housing 3 spaced apart from the housing wall 19. Furthermore, the overvoltage discharger device 1 has a support device 21 that supports the discharger columns 17 against the housing wall 19. Each discharger column 17 has a first column segment 23 and a second column segment 25. The support device 21 includes a load-bearing element 27, a plurality of support units 29 (four in the embodiment shown here), and for each discharger column 17 includes a coupling element 31 and a slip ring 33.

[0041] Figure 3 (Appendix) Figure 3 The support device 21 in the housing 3 is shown in top view.

[0042] Figure 4 (Appendix) Figure 4 The load-bearing element 27 is shown in a top view.

[0043] Figure 5 (Appendix) Figure 5 The support unit 29 is shown.

[0044] Figure 6 (Appendix) Figure 6 The connection between the support unit 29 and the load-bearing element 27 is shown in cross-section.

[0045] The carrier element 27 is constructed as a plate and has a carrier groove 35 for each coupling element 31, in which the coupling element 31 is disposed. Each coupling element 31 is constructed as a disc and is disposed between a first column segment 23 and a second column segment 25 of the discharger column 17. The column segments 23, 25, for example, each have a stack of rheostat elements, for example, made of metal oxide. Furthermore, each column segment 23, 25 has a column flange 26 that is in close contact with the coupling element 31. The column flanges 26 of the two column segments 23, 25 of each discharger column 17 are connected to each other by connecting elements 36, which are respectively guided through coupling element grooves 37 disposed in the coupling elements 31 between these column segments 23, 25. Each coupling element groove 37 has a larger diameter than the connecting element 36 guided through the coupling element groove 37. This allows the coupling element 31 to move relative to the discharger column 17 when connecting the column segments 23, 25 of the discharger column 17, for example, to compensate for radial manufacturing tolerances or tilting of the discharger column 17. The connecting element 36 is, for example, a screw.

[0046] Each slip ring 33 secures the coupling element 31 within a bearing groove 35, wherein the slip ring 33 is tightly fitted against the edge of the bearing groove 35 and the coupling element 31, allowing the coupling element 31 to slide relative to the bearing element 27 along the longitudinal axis of the discharger column 17, which is arranged between segments 23 and 25 of the discharger column 17. This allows for compensation of axial manufacturing tolerances when connecting segments 23 and 25 of the discharger column 17.

[0047] Each support unit 29 is connected to the housing wall 19 and the load-bearing element 27. For each support unit 29, the housing wall 19 has a housing wall opening 39 in the second housing portion 7 through which the support unit 29 is guided, and the housing wall opening 39 is surrounded by a wall flange 41 arranged on the outer side of the housing wall 19. The support unit 29 has a support flange 43 corresponding to the wall flange 41, which together with the wall flange 41 forms a support flange connector 45, through which the support unit 29 is fixed to the housing wall 19 on the outer side. Furthermore, the support unit 29 has an end region 47 that is detachably connected to the load-bearing element 27. This detachable connection between the support unit 29 and the load-bearing element 27 has a gap in a direction parallel to the longitudinal axis of the support unit 29. For this purpose, the end region 47 has a groove 49 in which the edge region 51 of the load-bearing element 27 is received. The edge region 51 of the support element 27 has two elongated holes 53 through which fixing elements 55 are guided. These fixing elements 55 connect to the region surrounding the edge region 51 of the end region 47 of the support unit 29. The elongated holes 53 allow the support element 27 to move relative to the support unit 29 in a direction parallel to the longitudinal axis of the support unit 29 when connecting the support element 27 to compensate for radial manufacturing tolerances. The end region 47 of the support unit 29 is connected to a section of the support unit 29 with a support flange 43 via an insulating section 57 made of electrically insulating material, which electrically isolates the support element 27 from the housing wall 19.

[0048] Although the invention has been shown and described in further detail through preferred embodiments, the invention is not limited to the disclosed examples, and those skilled in the art can derive other variations therefrom without departing from the scope of protection of the invention.

Claims

1. An overvoltage discharger device (1), comprising: - Discharger column (17). - A housing (3), in which the discharger column (17) is arranged, and the housing has a housing wall (19) that surrounds the discharger column (17) at a distance from it. - A support device (21) connected to the discharger column (17) and the housing wall (19), the support device supporting the discharger column (17) on the housing wall (19).

2. The overvoltage discharger device (1) according to claim 1, wherein, The support device (21) has a coupling element (31) arranged between the first column segment (23) of the discharger column (17) and the second column segment (25) of the discharger column (17).

3. The overvoltage discharger device (1) according to claim 2, wherein the overvoltage discharger device has a connecting element (36) that connects the first column segment (23) and the second column segment (25) to each other and is guided through a coupling element groove (37) in the coupling element (31), wherein, The groove (37) of the coupling element has a larger diameter than that of the connecting element (36).

4. The overvoltage discharger device (1) according to claim 2 or 3, wherein, The support device (21) has a bearing element (27) with a bearing groove (35) and the coupling element (31) is arranged in the bearing groove.

5. The overvoltage discharger device (1) according to claim 4, wherein, The support device (21) has a slip ring (33) that is in close contact with the edge of the bearing groove (35) and the coupling element (31), and allows the coupling element (31) to slide relative to the bearing element (27) along the longitudinal axis of the discharger column (17).

6. The overvoltage discharger device (1) according to claim 4 or 5, wherein, The support device (21) has a plurality of support units (29), wherein each support unit (29) connects the housing wall (19) and the load-bearing element (27) to each other.

7. The overvoltage discharger device (1) according to claim 6, wherein, For each support unit (29), the housing wall (19) has a housing wall opening (39) through which the support unit (29) is guided.

8. The overvoltage discharger device (1) according to claim 6 or 7, wherein, Each support unit (29) is connected to the housing wall (19) via a support flange connector (45).

9. The overvoltage discharger device (1) according to claim 8, wherein, Each support flange connection (45) of the housing wall (19) and the support unit (29) has a wall flange (41) arranged on the outer side of the housing wall (19) and a support flange (43) of the support unit (29) corresponding to the wall flange (41).

10. The overvoltage discharger device (1) according to any one of claims 6 to 9, wherein, Each support unit (29) is connected to the load-bearing element (27) via a detachable connector.

11. The overvoltage discharger device (1) according to any one of the preceding claims, wherein, The housing (3) has a first housing portion (5) and a second housing portion (7).

12. The overvoltage discharger device (1) according to claim 11, wherein, The first housing portion (5) and the second housing portion (7) are connected to each other in a region extending in a ring around the longitudinal axis of the discharger column (17).

13. The overvoltage discharger device (1) according to claim 11 or 12, wherein, The first housing portion (5) and the second housing portion (7) are connected to each other in a fluid-tight manner.

14. The overvoltage discharger device (1) according to any one of claims 11 to 13, wherein, The first housing portion (5) and the second housing portion (7) are detachably connected to each other.

15. The overvoltage discharger device (1) according to any one of claims 11 to 14, wherein, The first housing part (5) and the second housing part (7) are connected to each other by housing flange connector (9).

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