Housing part for a vacuum switching tube

Abstract

The invention relates to a housing part (14) for a vacuum switching tube (10), wherein the housing part (14) has an inner side (16) which faces an interior space (58) of the vacuum switching tube (10) and an outer side (18), wherein at least one outer electrode (20) is arranged on the outer side (18), wherein the outer electrode (20) is at least partially shape-changeable.

Description

[0001] The following invention relates to a housing part for a vacuum switching tube, wherein the housing part has an inner side which faces an interior of the vacuum switching tube, and an outer side, wherein at least one outer electrode is arranged on the outer side.

[0002] In a vacuum interrupter, insulators and metallic components are joined together by brazing or similar processes, such as welding. The joints are used for additional components that control the electric field and can reduce the amount of vapor coating on the insulators. Vacuum interrupters for higher voltages require electrodes, sometimes located outside the vacuum. This design is preferred in metal-enclosed high-voltage circuit breakers.

[0003] Previously, vacuum interrupters in circuit breakers were used without electrodes in the non-vacuum area, or the external electrodes were permanently connected to or integrated with the electrodes in the vacuum area. After brazing, the electrodes are no longer modifiable and are sensitive to mechanical damage during handling, assembly, or transport.

[0004] The object of the present invention is to create a housing part for a vacuum switching tube which can be used with high flexibility.

[0005] This problem is solved by a housing component according to the independent claim. Advantageous embodiments are specified in the dependent claims.

[0006] One aspect of the invention relates to a housing part for a vacuum switching tube, wherein the housing part has an inner side facing an interior of the vacuum switching tube and an outer side, with at least one outer electrode arranged on the outer side. It is provided that the outer electrode is at least partially shape-changeable.

[0007] This allows, in particular, the housing component to be arranged with high flexibility on or for a vacuum switching tube. The outer electrode can then compensate for deformation caused by temperature changes resulting from an arc within the vacuum switching tube, or from large temperature differences to the ambient temperature or the temperature of an insulating gas. Specifically, the outer electrode can thus essentially move along with any movement of the vacuum switching tube housing.

[0008] The vacuum switching tube can have at least one housing part with at least two external electrodes, and / or with at least four external electrodes. In the vacuum switching tube, in particular, a first switching contact is rigidly designed and a second switching contact is movable.

[0009] In particular, the invention proposes that, during the manufacture of the vacuum switching tube, only the electrode inside the vacuum switching tube, where the vacuum is located, is implemented. The outer electrodes are only mounted to the inner electrode after the soldering process.

[0010] The outer electrodes in the non-vacuum area are designed to cover a large dimensional tolerance range on the housing and to automatically readjust themselves in the event of changes in the shape of the housing or the electrodes due to temperature or pressure changes or mechanical influences, or to maintain the existing preload over the planned service life of the high-voltage circuit breaker. These electrodes can be manufactured as a single piece or in multiple parts.

[0011] These electrodes can be geometrically designed in such a way as to meet the necessary electrical requirements, including those for shielding triple points.

[0012] According to an advantageous embodiment, the outer electrode is at least divided into two parts and clamped by an external ring spring. This allows for a flexible outer electrode.

[0013] Another advantageous embodiment provides that the two-part outer electrode is connected to each other via a cylindrical pin. This allows the outer electrode to be made flexible accordingly.

[0014] In a further advantageous embodiment, the outer electrode is provided to be at least two-part and clamped by an internal ring spring and a tension pin. This advantageously allows for the creation of a flexible outer electrode.

[0015] In a further advantageous embodiment, the outer electrode is formed in one piece and clamped to the outside of the housing part via a bayonet fitting. This allows the flexibility of the outer electrode to be achieved.

[0016] It is also advantageous if the outer electrode is at least divided into two parts, with a corrugated wire arranged at least in some areas between the outer electrode and the outer surface, whereby a preload is formed by the corrugation of the wire. This allows the outer electrode to be designed with sufficient flexibility.

[0017] In a further advantageous embodiment, a clamping element is arranged at least partially between the corrugated wire and the outer surface. This allows for a flexible design of the outer electrode.

[0018] Furthermore, it has proven advantageous if the outer electrode is at least divided into two parts and pre-tensioned by an internal spring assembly. This pre-tensioning with the spring assembly allows the outer electrode to be designed flexibly.

[0019] It has also proven advantageous if the two parts of the external electrode are screwed together. This allows for a suitable connection between the two parts of the external electrode.

[0020] Another advantageous embodiment provides that the outer electrode is formed in one piece with a slot and is pre-tensioned on the outside. This allows for the simple provision of a pre-tensioned outer electrode to achieve the necessary flexibility.

[0021] It is also advantageous if the outer electrode has at least two receptacles for receiving a clamping tool. The clamping tool thus allows the outer electrode to be reliably positioned on the outer housing part.

[0022] It is also advantageous if the outer electrode is designed in two parts and pre-tensioned via an external clamping ring. This allows the outer electrode to be positioned flexibly on the outside in a simple manner.

[0023] It has also proven advantageous if the clamping ring is made of rubber. In particular, the clamping ring is made of rubber. This allows the preload to be reliably achieved.

[0024] In a further advantageous embodiment, the outer electrode is provided with at least two spring elements, which are arranged and pre-tensioned towards the outside. For example, at least three spring elements can be provided at an angle of substantially 120° to each other. This allows the outer electrode to be pre-tensioned in a simple manner.

[0025] It has also proven advantageous if the outer electrode is formed in one piece and a corrugated wire is formed between the outer surface and the outer electrode, at least in certain areas, wherein the outer surface has a contour that corresponds to the corrugation of the wire and forms a bayonet fitting. This ensures a reliable hold for the outer electrode while simultaneously allowing for the necessary flexibility of the outer electrode.

[0026] Another aspect of the invention relates to a housing for a vacuum switching tube with at least one housing part according to the preceding aspect.

[0027] Furthermore, the invention also relates to a vacuum switching tube with a housing part according to the preceding aspect.

[0028] Advantageous designs of the housing part are to be regarded as advantageous designs of the housing as well as the vacuum switching tube.

[0029] Regardless of the grammatical gender of a particular term, persons with male, female or other gender identities are included.

[0030] Further features and combinations of features of the invention will become apparent from the figures and their descriptions, as well as from the claims. In particular, further embodiments of the invention need not necessarily include all features of any one of the claims. Further embodiments of the invention may have features or combinations of features that are not mentioned in the claims.

[0031] This shows: Fig. 1: a schematic sectional view of an embodiment of a vacuum switching tube with an embodiment of a housing with an embodiment of a housing part; Fig. 2-4: Schematic views according to a first embodiment of a housing part; Fig. 5-7: Schematic views according to a second embodiment of the housing part; Fig. 8-10: further schematic views according to another embodiment of a housing part; Fig. 11-13: further schematic views according to another embodiment of a housing part; Fig. 14-16: further schematic views according to an embodiment of a housing part; Fig. 17-19: further schematic views according to an embodiment of a housing part; Fig. 20-22: further schematic views according to an embodiment of a housing part; Fig. 23-25: further schematic views according to an embodiment of a housing part; Fig. 26-28: further schematic views according to an embodiment of a housing part; Fig. 29-31: further schematic views according to an embodiment of a housing part; and Fig. 32-34: further schematic views according to one embodiment of a housing part.

[0032] In the figures, identical or functionally equivalent functions are designated with the same reference symbols.

[0033] Fig. Figure 1 shows a schematic sectional view of a vacuum switching tube 10. The vacuum switching tube 10 has at least one housing 12. The housing 12 has at least one housing part 14. The housing part 14 has an inner surface 16, which faces the interior 58, and thus a vacuum, of the vacuum switching tube 10, and the housing part 14 has an outer surface 18, wherein the outer surface 18 has an outer electrode 20. Fig. Figure 1 shows in particular that the outer electrode 20 is arranged essentially in a ring shape around the housing 12. Furthermore, the Fig. 1, that in particular four external electrodes 20 are provided in the following embodiment.

[0034] The vacuum switching tube 10 has a fixed switching contact 22 and a movable switching contact 24. When the switching contact 24 is moved, an arc can form between the switching contacts 22 and 24. This generates heat in the interior 58, causing, for example, the housing 12 to expand. A rigid outer electrode 20 could impair this process. Therefore, the outer electrode 20 is designed to be essentially flexible and deformable.

[0035] The term "shape-changing" specifically means that it is elastically shape-changing and not plastically shape-changing.

[0036] Fig. Figure 2 shows a schematic top view of the housing part 14 with the outer electrode 20. Fig. Figure 3 shows a corresponding section through layer AA. And the Fig. Figure 4 again shows a section through layer BB. In particular, it shows that the outer electrode 20 is at least divided into two parts and is clamped by an external ring spring 26. For this purpose, the two-part outer electrode 20 can, for example, be connected to each other by a cylindrical pin 28.

[0037] The Fig. 5-7 again show an alternative form to the design according to Fig. 2-4, the difference being in particular that the preload is not applied via a corresponding cylindrical pin 28, but via a connecting piece 30.

[0038] The Fig. Figures 8-10 show a further embodiment of the housing part 14. In the following exemplary embodiment, it is shown that the outer electrode 20 is also at least divided into two parts, in particular into three parts, wherein the parts of the outer electrode 20 are connected to each other, in particular by a clamping pin 32. The outer electrode 20 is in particular clamped with an internal ring spring 26 and has, for example, slotted tube segments.

[0039] The Fig. Figures 11-13 show a further embodiment of a housing part 14. In the following exemplary embodiment, the outer electrode 20 is essentially formed in one piece and is clamped to the outer surface 18 of the housing part 14 by means of a bayonet clamping mechanism 34. The bayonet clamping mechanism 34 includes, in particular, a spring stop 36 and a spring 38. Specifically, a one-piece outer ring and a two-piece inner ring with bayonet clamping mechanism 34 are thus provided.

[0040] The Fig. Figures 14-16 show a further schematic embodiment of a housing part 14. It is shown in particular that the outer electrode 20 is formed in two parts and is screwed together, for example, by screws 40. It is further provided that the outer electrode 20 is at least divided into two parts and that a corrugated wire 42 is arranged at least in some areas between the outer electrode 20 and the outer surface 18, with the preload being formed by the corrugation of the wire. In particular, the Fig. 14-16 a two-part ring with wavy-bent wire 42.

[0041] The Fig. Figures 17-19 show another embodiment in which the outer electrode 20 is again formed in two parts and the preload is applied via a spring string 44.

[0042] The Fig. Figures 20-22 show a further embodiment of the housing part 14, wherein the outer electrode 20 is formed in one piece and has a slot 46. The outer electrode 20 is in particular pre-tensioned on the outer surface 18. It can also be provided that the outer electrode 20 has two receptacles 48, for example in the form of bores, for receiving a clamping tool.

[0043] The Fig. Figures 23-25 ​​show a further embodiment according to the housing part 14. In particular, it is shown that the outer electrode 20 is essentially formed in two parts and is pre-tensioned by an external clamping ring 50. The clamping ring 50 is, in particular, made of rubber. In other words, the two-part outer electrode 20 with the external clamping ring 50 is shown.

[0044] The Fig. Figures 26-28 show a further embodiment of the housing part 14. In the present embodiment, a corrugated wire 42 is again shown as a corrugated ring, although this is only formed in certain areas. A clamping element 52 is shown in particular between the outer surface 18 and the corrugated wire 42.

[0045] The Fig. Figures 29-31 again show a further embodiment according to an embodiment of the housing part 14. In particular, it is shown that the outer electrode 20 is formed in one piece and has at least two spring elements 54, in the present embodiment three spring elements 54, which are arranged in the direction of the outside 18 and are pre-tensioned.

[0046] The Fig. Figures 32-34 show a further embodiment of the housing part 14 with the outer electrode 20, wherein in the following embodiment a corrugated wire 42 is again provided, but in this case the outer electrode 20 is formed in one piece. In the present embodiment, the outer surface 18 has a contour 56, in this case three contours 56, which correspond to the corrugation of the wire 42 and form a corresponding bayonet fitting. Thus, the Fig. 32-34 the one-piece external electrode 20 with a bayonet spring tension. Reference symbol list 10 vacuum switching tube 12 cases 14 Housing part 16 Inside 18 Outside 20 External electrode 22 fixed contacts 24 movable contacts 26 ring spring 28 Cylinder pin 30 connector 32 Tension pin 34 Bayonet clamping 36 Spring stop 38 spring 40 screws 42 wire 44 spring strand 46 slots 48 recording 50 clamping rings 52 clamping part 54 Spring element 56 contour 58 Interior

Claims

[1] Housing part (14) for a vacuum switching tube (10), wherein the housing part (14) has an inner side (16) which faces an interior space (58) of the vacuum switching tube (10) and an outer side (18), wherein at least one outer electrode (20) is arranged on the outer side (18), characterized by , that the outer electrode (20) is at least partially designed to be shape-changing. [2] Housing part (14) according to claim 1, characterized by that the outer electrode (20) is at least divided into two parts and is clamped by an external ring spring (26). [3] Housing part (14) according to claim 2, characterized by , that the two-part outer electrode (20) is connected to each other via a cylindrical pin (28). [4] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is at least divided into two parts and is clamped by an internal ring spring (26) and a tension pin (32). [5] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is formed in one piece and is clamped to the outside (18) of the housing part (14) via a bayonet clamping (34). [6] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is at least divided into two parts, wherein at least in some areas a corrugated wire (42) is arranged between the outer electrode (20) and the outer surface (18), wherein a bias voltage is formed by the corrugation of the wire (42). [7] Housing part (14) according to claim 6, characterized by , that a clamping element (52) is arranged at least in some areas between the corrugated wire (42) and the outer surface (18). [8] Housing part according to claim 1, characterized by that the outer electrode (20) is at least split into two parts and is pre-tensioned via an internal spring string (44). [9] Housing part (14) according to claim 6 or 7 or 8, characterized by, that the two parts of the external electrode (20) are screwed together. [10] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is formed in one piece with a slot (46) and is arranged under preload on the outside (18). [11] Housing part (14) according to claim 10, characterized by that the outer electrode (20) has at least two receptacles (48) for receiving a clamping tool. [12] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is formed in two parts and is pre-tensioned via an external clamping ring (50). [13] Housing part (14) according to claim 12, characterized by , that the clamping ring (50) is rubber-like. [14] Housing part (14) according to claim 1, characterized by that the outer electrode (20) has at least two spring elements (54) which are arranged and pre-tensioned in the direction of the outside (18). [15] Housing part (14) according to claim 1, characterized by , that the outer electrode (20) is formed in one piece and that a wave-shaped wire (42) is formed at least in some areas between the outer surface (18) and the outer electrode (20), wherein the outer surface (18) has at least in some areas a contour (56) which corresponds to the wave shape of the wire (42) and forms a bayonet fitting.

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