Modular spacer bar assembly for a barrier system of a tube electrode

Abstract

The invention relates to a spacer strip arrangement (1) for a barrier system (69) of a tubular electrode (71). In order to be able to dispense with complex reworking steps of spacer strips (9), in particular by machining processes, during the assembly of barrier systems (69), a spacer strip arrangement (1) comprising at least one base strip (3) and at least one filler strip (5) is provided, wherein the at least one base strip (3) has, on its longitudinal side, a contact side (21) designed to bear against an outer side (17) of a first barrier (19) and a first connecting side (23) opposite the contact side (21), and the at least one filler strip (5) has, on its longitudinal side, a support side (31) designed to bear against an inner side (29) of a second barrier (19) and a second connecting side (35) opposite the support side (31) and designed to connect to the first connecting side (23).

Description

[0001] The invention relates to a spacer bar arrangement for a barrier system of a tubular electrode. The invention further relates to a spacer bar, a modular system for assembling at least one spacer bar arrangement, a barrier system, a tubular electrode, and a method for positioning two tubular barriers of a barrier system relative to each other.

[0002] Tubular electrodes typically have a tubular geometry. This often consists of bends, tubes, and end caps. A layer of insulation, preferably made of paper or pressed wood, is preferably applied to this. A system of barriers, preferably made of pressed wood, can be arranged on top of this. The barrier system can be composed of nested, and in particular interlocked, tubular barriers of varying diameters. The barriers are often arranged coaxially. The individual barriers are preferably spaced apart from each other by spacers.

[0003] The tubular electrode, for whose barrier system the spacer strip arrangement according to the invention is preferably provided, can in particular be a tubular electrode for a conductor in a high-voltage device. In particular, the tubular electrode can be provided for the conductor of a coil winding in a transformer or in a choke. The tubular electrode is especially preferably provided for the conductor of a valve winding of a component of a high-voltage direct current (HVDC) transmission system.

[0004] Spacer strips are usually cut from chipboard in a joinery workshop and milled convex / concave and with a shoulder to extend the sliding path on a strip milling machine.

[0005] Due to tolerances in diameter, wall thickness, and dimensional stability of the particleboard barriers, the prefabricated spacer strips often need to be individually adapted to the specific conditions during installation. This is done, for example, by planing, sanding, and cutting. These steps incur additional costs.

[0006] CH 695 920 A5 relates to a cable run for power transformers, with a conductive inner tube, electrical insulation applied to the outside of this inner tube and at least one barrier system.

[0007] EP 2 287 864 A1 relates to a discharge tube for high-voltage transformers, comprising a shield tube made of an electrically conductive material, which extends hollow-cylindratically around a path that is at least partially curved in its axial direction and comprising a hollow-cylindrically formed electrical insulation layer, which is arranged at a first radial distance around the shield tube along its axial extent.

[0008] It is therefore the object of the invention to provide a spacer strip arrangement that eliminates the need for on-site adjustment of the spacer strips, in particular by machining processes.

[0009] This problem is solved by a spacer strip arrangement according to claim 1, as well as by a spacer strip according to claim 9, a modular system according to claim 10, a barrier system according to claim 11, a pipe electrode according to claim 12 and a method according to claim 13. Advantageous embodiments are the subject of the dependent claims.

[0010] According to the invention, the spacer strip arrangement therefore includes at least one base strip and at least one

[0011] The filler strip comprises, wherein the at least one base strip has along its longitudinal side a contact side designed for contact with an outside of a first barrier and a first connecting side opposite the contact side, and the at least one filler strip has along its longitudinal side a support side designed for contact with an inside of a second barrier and a second connecting side opposite the support side designed for connection with the first connecting side.

[0012] The spacer strip according to the invention comprises a spacer strip arrangement, wherein the at least one filler strip is materially bonded, in particular glued, to the at least one base strip. The at least one filler strip can alternatively or additionally be form-fitted to the at least one base strip.

[0013] The modular system according to the invention for assembling at least one spacer strip arrangement comprises a plurality of filler strips of different heights and / or widths and a plurality of base strips of different heights and / or widths. A spacer strip arrangement according to the invention can then be assembled from these components, and a spacer strip according to the invention can then be manufactured from them.

[0014] The barrier system according to the invention comprises a plurality of nested barriers, in particular barriers arranged coaxially to each other, wherein at least one spacer strip according to the invention is arranged between at least two directly successive barriers.

[0015] For the tubular electrode according to the invention, which is in particular a tubular electrode of a conductor design in a high-voltage device, for example a valve winding of a component of a system for high-voltage direct current transmission (HVDC), it is provided that the tubular electrode is made of an electrically conductive material and is surrounded at least partially by a barrier system according to the invention.

[0016] The inventive method for positioning two tubular barriers of a barrier system relative to each other by means of a spacer strip arrangement according to the invention comprises the following steps: Arranging, and in particular gluing, a base strip onto an outer surface, in particular a convex one, of a first of the two barriers; selecting a filler strip of suitable height from an assortment of filler strips; joining the filler strip to the base strip, in particular by positive locking and / or material locking; and attaching the second barrier to the outside around the first barrier, wherein an inner surface of the second barrier is brought into contact with the support surface of the filler strip, in particular to be abut it.

[0017] The modular and at least two-part design of the spacer strip according to the invention eliminates the need for the aforementioned on-site adjustment steps, particularly time-consuming machining processes. Instead, a first barrier can be fitted with the base strip. Subsequently, at least one filler strip can be selected to appropriately fill the gap between the base strip and the second barrier. The spacer strip, composed of at least one base strip and at least one filler strip, is then a perfect fit and requires no complex adjustments.

[0018] The solution according to the invention can be further improved by various embodiments, each advantageous in itself and arbitrarily combinable with one another. These embodiments and their associated advantages are discussed below.

[0019] According to a first advantageous embodiment of the spacer strip arrangement according to the invention, the connecting surfaces of the base strip and the filler strip can be shaped complementarily to each other. This allows for a precise fit of the filler strip to the base strip.

[0020] In particular, the connecting surfaces of the base strip and the filler strip can have complementary interlocking elements.

[0021] Preferably, the connecting side of the base strip or the filler strip is provided with at least one groove structure in which at least one section of the at least one other strip, in particular at its connecting side, can be received.

[0022] Preferably, a groove is present in the connecting side of the base strip. The groove can extend over the entire length of the base strip.

[0023] The at least one filler strip can be provided with a structure that fits into the groove. It is particularly preferred that the at least one filler strip itself can be received in the groove at its joint end. For this purpose, the at least one filler strip can be narrower than the base strip. The width of the filler strip can correspond to the width of the groove.

[0024] Alternatively or in addition to the groove structure, the strips can be provided with other interlocking elements. For example, the strips can be equipped with complementary plug-in and / or snap-fit ​​elements that allow the strips to be plugged together.

[0025] To improve the fit of the base strip on the outside of a tubular first barrier, its contact surface can be provided with a concave cross-section. This cross-section runs transversely to a longitudinal extent of the base strip. The concave shape of the contact surface preferably has a radius that is adapted to the radius of the barrier.

[0026] To improve the fit of the support side of the filler strip to the inside of a tubular barrier, it can be provided with a convex cross-section and / or chamfered edges.

[0027] Preferably, both the base strip and the filler strip are made of an electrically insulating material, in particular pressed chipboard, wood, paper, cardboard or another material, especially a cellulose-containing material.

[0028] According to a further advantageous embodiment of the spacer strip arrangement according to the invention, it can have a continuous base strip and two or more filler strips, the sum of whose lengths is less than or equal to the length of the base strip. This facilitates adaptation to the barriers.

[0029] Alternatively, the arrangement can be reversed, meaning there can be one continuous filler strip and several base strips. The shorter strips can have different heights, for example, to compensate for differences in height, especially at barriers.

[0030] The modular system according to the invention can be further improved by providing certain standard widths of the base strip. By way of example, base strips can be provided in two standard widths, preferably 30 mm and 35 mm. Additionally, the modular system can provide suitable infill strips for these base strips. Preferably, infill strips with finely graduated heights are provided. For example, the heights of the different infill strips can be graduated in 1 mm increments. The infill strips and the base strips can be provided in standardized lengths, for example, 2000 mm.

[0031] In the barrier system according to the invention, several spacer strips can be installed between two adjacent barriers. These can be arranged equidistantly along a circumferential direction. Preferably, these spacer strips are each composed of identical base strips and identical filler strips. If the individual barriers deviate from a hollow cylindrical shape or are not coaxial with each other, the spacer strips between these two barriers can have different dimensions. Preferably, the base strips are identical but connected to filler strips of different heights.

[0032] To further explain the invention, the following section of the description refers to figures from which further advantageous details and possible applications of the invention can be derived. The figures are to be understood as exemplary and are intended to illustrate the character of the invention, but in no way to limit or exhaustively represent it. The same reference numerals are always used for elements with the same structure and / or function.

[0033] They show: Fig. 1 A schematic, perspective view of an embodiment of the spacer strip arrangement according to the invention; Fig. 2 A schematic, perspective view of an embodiment of the spacer strip according to the invention; Fig. 3 A cross-section through the spacer strip made of Fig. 2Fig. 4 shows a further embodiment of a spacer strip according to the invention; Fig. 5 shows a cross-section through a barrier system according to the invention; Fig. 6 shows a barrier system according to the invention in a perspective view; and Fig. 7 shows a plurality of spacer strips for the barrier system made of Fig. 6 .

[0034] The invention is described below with reference to a spacer bar arrangement and a spacer bar made from the spacer bar arrangement. Figures 1 to 3 explained. This shows Figure 3 a cross-section through the in Figure 2 Distance bar shown.

[0035] The exemplary spacer arrangement 1 comprises a base strip 3 and a filler strip 5.

[0036] Base bar 3 and filler bar 5 are designed to connect to each other. In a connected state 7, as shown in the Figures 2 and 3 As shown, together they form a distance bar 9.

[0037] Base strip 3 and filler strip 5 are each designed to be elongated and each run in a straight line along a respective longitudinal axis 11 or 13.

[0038] In its assembled state, strips 3 and 5, and thus longitudinal axes 11 and 13, run parallel to each other. The spacer strip 9 extends along a longitudinal axis 15, which runs parallel to longitudinal axes 11 and 13.

[0039] In the Figures 1 to 3 In the illustrated embodiments, the base strip 3, the filler strip 5, and the spacer strip 9 composed of them are each elongated. That is, the strips 3, 5, 9 are each longer along their longitudinal axes 11, 13, 15 than they are high or wide. However, this is not mandatory. Depending on the requirements, at least one of the strips 3, 5, 9 can be shorter than it is wide or high. This will be discussed further below with reference to the Figure 7 received.

[0040] As a further deviation from the elongated embodiments shown as examples, the strips 3, 5, 9 can be curved or bent. This will not be discussed further here.

[0041] The individual strips are described in more detail below. The base strip 3 has a mounting side 21 designed for attachment to an outer side 17 of a first barrier 19. A section of a first barrier 19 is shown in Figure 3 Indicated by dashed lines.

[0042] The installation side 21 is preferably concave in shape and particularly preferably adapted to the shape of the outer side 17 of the first barrier 19, which is usually hollow cylindrical.

[0043] The base strip 3 also has a first, or base strip-side, connection side 23 opposite the mounting side 21. Preferably, the connection side 23 is opposite the mounting side 21 in a vertical direction 25, wherein the vertical direction 25 runs perpendicular to the mounting side 21 and perpendicular to the longitudinal axis 11.

[0044] The altitude direction 25 is in Figure 3 The height direction 25 of the base strip 3 coincides with a height direction 27 of the filler strip 5 in the assembled state 7. The height directions 25, 27 run radially to the cylindrical first barrier 19 when the spacer strip 9 is attached to the barrier 19.

[0045] The filler strip 5 has a connection to the inside 29 of a second barrier 19 (in Figure 3 (indicated by dashed lines) designed support side 31.

[0046] The support side 31 is preferably adapted to the concave shape of the inner surface 29 of the second barrier 19. Preferably, the support side 31 is provided with chamfered edges 33. Alternatively, it can be convex or have rounded edges. With the exception of the support side 31, the filler strip 5 can have an overall rectangular cross-section.

[0047] The filler strip 5 also has a second, or filler strip-side, connecting side 35 opposite the support side 31, in particular opposite in the height direction 27.

[0048] The second connecting side 35 is designed to connect to the first connecting side 23. For this purpose, the connecting sides 23 and 35 are preferably shaped to be complementary to each other.

[0049] To achieve the complementary design, the base strip 3 is provided with a groove structure 37. The groove structure 37 includes a groove 39 running parallel to the longitudinal axis 11 in the first connecting side 23.

[0050] The filler strip 5 has a width 41, which is less than or equal to the width 43 of the groove 39. The width 41 is measured in a width direction 45 of the filler strip 5, which runs perpendicular to the longitudinal axis 13 and perpendicular to the height direction 27.

[0051] The width 43 of the groove 39 in the base strip 3 is measured in a width direction 47 of the base strip 3, which runs both perpendicular to the longitudinal axis 11 and perpendicular to the height direction 25 of the base strip 3.

[0052] In order to provide sufficient space for the groove 39, a width 49 of the base strip 3 is necessarily larger than the width 43 of the groove 39 and correspondingly larger than the width 41 of the filler strip 5.

[0053] The groove 39 and the second connecting side 35 of the filler strip 5 represent complementary shaped form-locking elements 51, 53.

[0054] As an alternative to the embodiment described above, the groove 39 can be arranged in the second connecting side 35 of the filler strip. The base strip 3 can then have a structure complementary to the groove 39. In the simplest case, the base strip 3 can be received in the groove 39 at its first connecting side 23. In this case, the width 41 of the filler strip 5 would be greater than the width 49 of the base strip 3.

[0055] A total height 55 of the spacer strip 9 preferably corresponds to a radial distance 57 between the two barriers 19. By appropriately selecting the strips 3, 5 with the corresponding heights, the total height 55 of the spacer strip 9 can be adjusted to the distance 57.

[0056] In the described embodiment, the total height 55 can be calculated as the sum of the height 59 of the filler strip 5 and the effective height 61 of the base strip 3. The effective height 61 of the base strip is the shortest height between the contact side 21 and a base 63 of the groove 39. This is generally located at the center of the base strip 3 with respect to the width direction 47. The heights 59 and 61 are measured along the height directions 25 and 27, respectively.

[0057] Base strip 3 and / or filler strip 5 are preferably made of an electrically insulating material, in particular chipboard.

[0058] To form the spacer strip 9, the base strip 3 is preferably connected to the filler strip 5 by a form-fit and material-fit connection. The form-fit connection is achieved, at least along the width directions 45, 47, by the seating of the filler strip 5 in the groove 39 of the base strip 3. The material-fit connection is preferably achieved by gluing the two strips 3, 5 together in the area of ​​the connecting sides 23, 35.

[0059] The following describes a further embodiment of a spacer strip arrangement 1 according to the invention and a spacer strip 9 formed therefrom with reference to the Figure 4 described. Only the differences to the one with reference to the Figures 1 to 3 described embodiment included.

[0060] The in Figure 4 The embodiment shown has a continuous base strip 3 and two filler strips 5 received in the groove 39 of the base strip 3.

[0061] The first of the two filler bars 5 (in Figure 4 (shown on the left) has a length of 60 and the second of the two filler bars is 5 (in Figure 4 The length shown on the right (62) is 62. The sum of lengths 60 and 62 is less than the length 64 of base bar 3.

[0062] This arrangement can be particularly advantageous if the two barriers (not shown here) are not shaped and / or aligned exactly coaxially with each other, or if at least one of the barriers deviates from a hollow cylindrical shape. The aforementioned problems can lead to a varying distance 57 between the barriers 19 along the longitudinal axis 15.

[0063] In order to connect both barriers 19 with a spacer strip 9 and hold them in position despite the aforementioned conditions, the two filler strips 5 have different heights 59. The height 59 of the one shown in [reference to relevant section] is merely an example. Figure 4 The filler bar 5 shown on the left is larger than the height 59 of the one shown in Figure 4 Fill bar 5 shown on the right side.

[0064] The different heights 59 of the filler strips 5 allow deviations in the spacing 57 of the barriers 19 to be compensated for. A gap 65 can extend between the two filler strips 5.

[0065] The taller of the two filler strips 5 can be flattened towards the shorter filler strip 5, i.e., have a chamfer 67, by which the height 59 of the taller filler strip 5 is reduced to the height 59 of the shorter filler strip 5. The chamfer 67 can extend along the longitudinal axis 13 of the filler strip 5 in a chamfer section 68.

[0066] The chamfer 67 prevents an abrupt transition between the filler strips 5. In particular, this facilitates sliding a barrier 19 onto the spacer strip 9.

[0067] The in Figure 4The spacer strip 9 shown can have any number of filler strips 5 with any number of different heights 59, depending on the requirements specified by the barriers 19 to be mounted.

[0068] Figure 5 Figure 1 shows an exemplary embodiment of a barrier system 69 according to the invention and a tubular electrode 71 which is arranged inside the barrier system 69.

[0069] The barrier system 69 comprises a plurality of barriers 19 arranged essentially coaxially to one another. The barriers 19 and the tubular electrode 71 are arranged around a common axis 73.

[0070] Viewed from the axis 73 in a radial direction 75 outwards, the tubular electrode 71 first extends around the axis 73. Further in the radial direction 75 follow the barriers 19, the barriers 19 having larger diameters 77 with increasing distance from the axis 73.

[0071] The tubular electrode 71 is made of a conductive material. Preferably, the tubular electrode 71 is made of a metal tube. Alternatively, the tubular electrode 71 can be made of a conductive foil, in particular a metal foil or a foil containing metal.

[0072] Between each pair of barriers 19 arranged in a radial direction 75 successive sections, at least one spacer bar 9 is arranged to hold the barriers 19 in their position.

[0073] The distances 57 between two adjacent barriers 19 increase with increasing distance from the pipe electrode 71. For this reason, and due to the barrier diameters 77 increasing from the inside to the outside, the spacer strips 9 differ between the different barrier pairs.

[0074] A modular system according to the invention can have base strips 3 with different contact sides 21 which are adapted to the respective barrier diameters 77.

[0075] In addition, the modular system can provide suitable filler strips 5 in different heights 59 for the grooves 39 of the base strips.

[0076] This allows precisely fitting spacer strips 9 to be produced on-site by selecting the appropriate strips 3 and 5. Machining processes for adjusting the strip heights during the installation of the barrier system 69 are therefore unnecessary.

[0077] The spacer strip arrangement 1 according to the invention also allows an uneven distance 57 between two adjacent barriers 19 to be selected by choosing the appropriate strips 3 and 5, in particular by choosing filler strips 5 of appropriate heights 59.

[0078] The following describes a barrier system 69 with reference to Figures 6 and 7, focusing mainly on the differences to the one with reference to Figure 5 described barrier system 69 has been entered into. Figure 7shows the distance bars 9 of the barrier system 69 from Figure 6 .

[0079] The barrier system 69 extends around a tubular electrode 71 which, in contrast to the embodiments described so far, does not have a completely straight course, but has curved sections 79 and straight sections 81 that are arranged alternately.

[0080] In the straight sections 81, the spacer bars 9 are elongated and essentially as in the section with reference to the Figures 1 to 3 described embodiment.

[0081] A cross-section through one of the straight sections 81 would result in an arrangement according to the principle of the with reference to the Figure 5 described embodiment of the barrier system 69.

[0082] In the curved sections, the spacer bars 9 can have a length that is less than or equal to their width and / or height. This allows the radii of the barriers 19 in the curved sections 79 to be taken into account.

[0083] By selecting suitable base strips 3 and filler strips 5, the curved course of the barrier system 69 can be taken into account. In this case, too, time-consuming reworking of the strips 3 and 5 for on-site adjustment can be avoided. Reference sign

[0084] 1 Spacer arrangement 3 Base strip 5 Filler strip 7 Assembled state 9 Spacer strip 11 Longitudinal axis of the base strip 13 Longitudinal axis of the filler strip 15 Longitudinal axis of the spacer strip 17 Outside of a barrier 19 Barrier 21 Mounting side 23 First connecting side 25 Vertical direction of the base strip 27 Vertical direction of the filler strip 29 Inside of a barrier 31 Support side 33 Edges 35 Second connecting side 37 Groove structure 39 Groove 41 Width of the filler strip 43 Width of the groove 45 Horizontal direction of the filler strip 47 Horizontal direction of the base strip 49 Width of the base strip 51, 53 Positive locking elements 55 Total height of the spacer strip 57 Spacing of the barriers 59 Height of the filler strip 60, 62 Length of the filler strip 61 Effective height of the base strip 63 Bottom of the groove 64 Length of base strip 65 Gap 67 Chamfer 68 Chamfer section of filler strip 69 Barrier system 71 Tubular electrode 73 Common axis 75 Radial direction 77 Barrier diameter 79 Curved section 81 Straight section

Claims

1. A spacer strip arrangement (1) for a barrier system (69) of a tube electrode (71), comprising at least one base strip (3) and at least one filling strip (5), wherein the at least one base strip (3) has on a longitudinal side a contact side (21) configured for contact with an outer side (17) of a first barrier (19) and a first connection side (23) opposite the contact side (21), and the at least one filling strip (5) has on a longitudinal side a support side (31) configured for contact with an inner side (29) of a second barrier (19) and a second connection side (35) opposite the support side (31) configured for connection to the first connection side (23).

2. The spacer strip arrangement (1) according to claim 1, wherein the connection sides (23, 35) of the base strip (3) and the filling strip (5) are shaped complementary to each other.

3. The spacer strip arrangement (1) according to claim 2, wherein the connection sides (23, 35) of the base strip (3) and the filling strip (5) have form-fit elements (51, 53) shaped complementary to each other.

4. The spacer strip arrangement (1) according to claim 3, wherein the connection side (23) of the base strip (5) or the connection side (35) of the filling strip (5) is provided with at least one groove structure (37) in which at least a section of the other strip (5, 3) is receivable.

5. The spacer strip arrangement (1) according to any one of the preceding claims, wherein the contact side (21) of the base strip (3) is provided with a concave cross section.

6. The spacer strip arrangement (1) according to any one of the preceding claims, wherein the support side (31) of the filling strip (5) is provided with a convex cross section or with chamfered edges (33).

7. The spacer strip arrangement (1) according to any one of the preceding claims, wherein both the base strip (3) and the filling strip (5) are manufactured from an electrically insulating material.

8. The spacer strip arrangement (1) according to any one of the preceding claims, wherein the spacer strip arrangement (1) has a continuous base strip (3) and two or more filling strips (5) the lengths (60, 62) of which are, in total, less than or equal to the length (64) of the base strip (3).

9. A spacer strip (9) comprising a spacer strip arrangement (1) according to any one of the preceding claims, wherein the at least one filling strip (5) is connected to the at least one base strip (3) in a firmly bonded and / or form-fitting manner.

10. A modular system for assembling at least one spacer strip arrangement (1) according to any one of the preceding claims, wherein the modular system comprises a plurality of filling strips (5) of different heights (59) and / or widths (41) and a plurality of base strips (3) of different heights (61) and / or widths (49).

11. A barrier system (69) comprising a plurality of interleaved barriers (19) and at least one spacer strip (9) according to claim 9, wherein at least one spacer strip (9) according to claim 9 is arranged between at least two directly successive barriers (19).

12. An arrangement of a tube electrode (71), in particular tube electrode (71) of a line configuration in a high-voltage device, and a barrier system (69) according to claim 11, wherein the tube electrode (71) is manufactured from an electrically conductive material and is surrounded at least in sections by the barrier system (69) according to claim 11.

13. A method for positioning two tubular barriers (19) of a barrier system (69) relative to one another by means of a spacer strip arrangement (1) according to any one of claims 1 to 8, comprising the steps of: - arranging a base strip (3) on an outer side (17) of a first of the two barriers (19), - selecting a filling strip (5) with a suitable height (59) from a range of filling strips (5), - connecting the filling strip (5) to the base strip (3), - attaching the second barrier (19) externally around the first barrier (19), wherein an inner side (29) of the second barrier (19) is connected to the support side (31) of the filling strip (5).

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