Switching contact for a vacuum switching tube and vacuum switching tube

Abstract

Switching contact for a vacuum switch, with a contact rod (11), a contact carrier (3) connected to the contact rod (11), a contact disc (1) which is connected to the contact carrier (3), and a support body (6) extending from the contact disc (1) towards the contact rod (11) and / or the contact carrier (3) in such a way as to prevent and / or reduce the lowering of the contact disc (1) and wherein the contact rod (11) is electrically connected to the contact carrier (3), wherein the contact disc (1) is electrically connected to the contact carrier (3), and wherein the support body (6) is held in position between the contact disc (1) and the contact carrier (3) or the at least one additional support body (5, 8) either by the shaping of the contact disc (1) and / or the contact carrier (3) and / or an additional support body (5, 8) and / or by soldering, wherein the switching contact has at least one additional support body (5, 8) which - has the shape of a truncated cone, a hollow truncated cone, or a partially hollow truncated cone, - the additional support body (5,8) itself ◯ from a first location (8') on the bottom of the contact carrier (3), which is in the imaginary extension of the contact rod (11) and inside the contact carrier (3), ◯ to a second location (5') which is located on the side of the contact disk (1) facing the contact carrier (3) and is offset from the first location (8') to the outer edge of the contact disk (1), - wherein the additional support body (5,8) is connected to the contact disc (1), and wherein - the additional support body (5,8) is connected to the contact carrier (3), characterized in that the additional support body (5,8) is designed in two parts, and the truncated cone or hollow truncated cones or partially hollow truncated cones by - a first additional support body (8) which is soldered to the contact carrier 3, and - a second additional support body (5) is formed which is soldered to the contact disc 4, wherein the first additional support body (8) and the second additional support body (5) are soldered together.

Description

[0001] The invention relates to a switching contact for a vacuum switching tube, in particular to a switching contact with a support body, and to such a vacuum switching tube.

[0002] Switching contacts for vacuum switching tubes are known from the prior art, consisting of a switching contact carrier and a contact plate or contact disc. In particular, it is known that the switching contact carrier has a coil segment for generating a magnetic field, wherein this coil segment is formed by slotting the lateral rim of a cup-shaped contact carrier.

[0003] Such contact arrangements are known from EP 0104384 B1 and EP 0155376 B1.

[0004] Depending on the orientation of the coil segments of such contact arrangements to each other, either a radial or an axial magnetic field is generated.

[0005] For high-voltage applications, arrangements with an axial magnetic field are particularly relevant. To generate an axial magnetic field, the slots in the coil segments of the contact carriers in both contacts are oriented in the same direction.

[0006] To prevent the contact discs of switching contacts for vacuum switching tubes from settling, i.e. sinking, it is known from the prior art to provide support bodies.

[0007] DE 3231593 A1 discloses such a support body for a switching contact.

[0008] WO 2006003114 A2 further specifies that a support body can also be provided on the outer circumference of the switching contact carrier. While such a design helps to increase performance, it does not offer protection against the contact disc sagging.

[0009] DE 35 07 317 A1 and WO 2003 / 096 364 A1 disclose switching contacts with support bodies and other arrangements.

[0010] The object of the invention is to eliminate the disadvantages of the prior art and to prevent both the coil from twisting and the contact disc from sinking.

[0011] This problem is solved by a switching contact for a vacuum switching tube according to claim 1 and a vacuum switching tube with such a switching contact according to claim 5.

[0012] In one embodiment, the switching contact for a vacuum switch with a contact rod consists of: a contact carrier connected to the contact rod, a contact disc connected to the contact carrier, and a support body extending from the contact disc towards the contact rod and / or the contact carrier in such a way as to prevent and / or reduce the lowering of the contact disc and wherein the contact rod is electrically connected to the contact carrier, wherein the contact disc is electrically connected to the contact carrier, and wherein the support body is held in position between the contact disc and the contact carrier or the additional support body either by the shaping of the contact disc and / or the contact carrier and / or an additional support body and / or by soldering, wherein the switching contact has an additional support body which - has the shape of a truncated cone, a hollow truncated cone, or a partially hollow truncated cone, - the additional support body ◯ from a first location or area on the bottom of the contact carrier, which is in the imaginary extension of the contact rod and is located inside the contact carrier, ◯ to a second location or area located on the side of the contact disc facing the contact carrier and offset from the first location or area on the outer edge of the contact disc, ◯ wherein the additional support body is connected to the contact disc and wherein The additional support body is connected to the contact carrier. The contact carrier consists of a U-shaped body of revolution, i.e., a body that acquires a U-like shape through rotation, also known as a pot-shaped body. This pot-shaped body is closed on three sides and open on one side, and has an outer and an inner surface. The inner surface and the outer surface of the side opposite the open surface are called the base. The contact rod is connected to the outer surface of this base of the contact carrier. At least a portion of the inner surface of the base of the contact carrier is connected to at least a portion of the additional support body or at least a portion of the first additional support body.

[0013] It is also preferred that the support body and / or additional support body be made of a material with lower conductivity than copper and with higher mechanical stability than copper; in particular, it is preferred that the support body and / or additional support body be made of stainless steel.

[0014] It is further preferred that the contact rod is electrically connected to the contact carrier by soldering, and / or the contact disc is electrically connected to the contact carrier by soldering, and / or the additional support body is connected to the contact disc by soldering, and / or the additional support body is connected to the contact carrier by soldering.

[0015] It is preferred that the additional support body is designed in two parts and that the truncated cone or hollow truncated cone or partially hollow truncated cone is formed by - a first additional body that is soldered to the contact carrier, and - a second additional support body is formed, which is soldered to the contact disc, wherein the first additional support body and the second additional support body are soldered together.

[0016] The resulting truncated cone, hollow truncated cone, or partially hollow truncated cone forms a rotationally symmetric body or body of revolution.

[0017] It is particularly preferred that the material thickness of the first additional support body is greater than that of the second additional support body. This takes into account the different mechanical and electromagnetic requirements. The two-part design offers advantages, among other things, with regard to the manufacturing of the additional support body.

[0018] The additional support body could also be manufactured in one piece. It might be further preferred that the material thickness of the portion of the additional support body located at the base of the contact carrier, in the imaginary extension of the contact bar, be greater than the material thickness of the portion of the additional support body extending from the side of the contact disc facing the contact carrier towards the base of the contact carrier. This accommodates the different mechanical and electromagnetic requirements. The one-piece design offers advantages, among others, with regard to the assembly of the switching contact.

[0019] It is also preferred that solder foils and / or solder rings are present to secure the solder joint between - the contact disc and the additional support body , - the contact disc and the contact carrier, - the first additional support body and the second additional support body, - the additional support body and the contact carrier, and - to train the contact carrier and the contact rod.

[0020] If the additional support body were made in one piece, then of course no plumb connection between a first additional support body and a second additional support body is necessary and therefore not present.

[0021] In particular, it is also preferred that the soldering is carried out by means of a sealing soldering in one step.

[0022] It is also preferred that the soldering of the closure is carried out under vacuum conditions, in particular in a vacuum furnace.

[0023] A vacuum switching tube with one or two switching contacts of the above type is also preferred.

[0024] The invention is described in more detail below with reference to figures within the framework of an exemplary embodiment. Fig. 1 switching contact in side view and in section Fig. 2 Sectional view of a switching contact.

[0025] The Fig. Figure 1 shows a possible embodiment of a switching contact, with the left side showing a side view and the right side showing a section through the switching contact.

[0026] The contact rod 11, which is connected to the contact carrier 3, can be seen on the cut side, the connection preferably being made by means of solder foil or a solder ring 10.

[0027] The contact disc 1 is arranged on the side of the contact carrier 3 opposite the contact rod and is preferably connected to the contact carrier 3 by means of solder foil or a solder ring 2.

[0028] Furthermore, the Fig. 1. A two-part auxiliary support body 5, 8, consisting of a first auxiliary support body 8 and a second auxiliary support body 5. Not shown is a one-piece embodiment, which would be constructed analogously, except that in a one-piece design the auxiliary support body (5, 8) does not consist of a first auxiliary support body (8) and a second auxiliary support body (5), but rather of a single part, preferably a turned or cast part, in the form of a truncated cone or a hollow truncated cone or a partially hollow truncated cone.

[0029] Regardless of whether it's a one-piece or two-piece design, the section shows in the Fig. 1, that at least on a portion of the inner surface of the base of the contact carrier 3, a first auxiliary support body, rectangular in cross-section and provided with recesses, is attached, tapering towards the edge of the contact carrier 3, to which either the second auxiliary support body is attached, or, not shown, the auxiliary support body extends further towards the contact disc 1. In the case of the second auxiliary support body 5 shown here, this second auxiliary support body 5 extends from a recess in the first auxiliary support body 8 initially parallel to the base of the contact carrier 3 and then bends such that it extends in a straight line or curve towards the contact disc 1. Preferably, the second auxiliary support body 5 has a smaller thickness than the first auxiliary support body 8. It is also preferred that, as in Fig. As shown in Figure 1, the location 5' where the second additional support body 5 is connected to the contact disc 1 is closer to the location where the contact carrier 3 is connected to the contact disc 1 than to the imaginary extension of the contact rod. It should be noted that the above description refers to the section view and that the described shapes form a single body through rotation.

[0030] Preferably, the first additional support body 8 and the second additional support body 5 are soldered together using solder foil or solder ring (7).

[0031] The first additional support body 8 is positioned at the first location or in the first area 8' below the contact rod 11, i.e. in the imaginary extension of the contact rod, on the inside of the contact carrier 3 and is preferably soldered to it by means of solder foil or solder ring 9.

[0032] The second additional support body 5 is soldered to the contact disc 1 at location 5' or in area 5', wherein the second additional support body (5) is attached to the side of the contact disc 1 that points towards the contact carrier 3.

[0033] The Fig. Figure 1 further shows that area 5' is offset from the edge of contact disk 1 compared to area 8'.

[0034] Fig. 2 shows the cut from Fig. 1 in magnification. Here too it can be seen that the contact rod 11 is soldered to the contact carrier (3) by means of solder foil or a solder ring 10.

[0035] In this two-part design, the additional support element 5, 8 is formed by the first additional support element 8 and the second additional support element 5, which are soldered together by means of solder foil or solder ring 7.

[0036] In this embodiment, the support body 6 is arranged between the additional support body 5 and the contact disc 1 and is preferably soldered to them.

[0037] The solder foil or solder ring 9, 4 connects the contact carrier 3 to the first additional support body 8 and the second additional support body 5 to the contact disc 1. Reference symbol list 1 contact disc 2. Solder foil and / or solder ring 3 contact carriers 4. Solder foil and / or solder ring 5 second additional support body 5' second place 6 support bodies 7. Solder foil and / or solder ring 8 first additional support body 8' first place 9. Solder foil and / or solder ring 10 Solder foil and / or solder ring 11 Contact rod

Claims

[1] Switching contact for a vacuum switch, with a contact rod (11), a contact carrier (3) connected to the contact rod (11), a contact disc (1) which is connected to the contact carrier (3), and a support body (6) which extends from the contact disc (1) in the direction of the contact rod (11) and / or the contact carrier (3) in such a way that a lowering of the contact disc (1) is prevented and / or reduced and, wherein the contact rod (11) is electrically connected to the contact carrier (3), wherein the contact disc (1) is electrically conductively connected to the contact carrier (3), and wherein the support body (6) is held in the position between the contact disc (1) and the contact carrier (3) or the at least one additional support body (5, 8) either by the shape of the contact disc (1) and / or the contact carrier (3) and / or an additional support body (5, 8) and / or by soldering, wherein the switching contact has at least one additional support body (5,8) which - has the shape of a truncated cone or a hollow truncated cone or a partially hollow truncated cone, - the additional support body (5,8) ◯ from a first location (8') at the bottom of the contact carrier (3), which is located in the imaginary extension of the contact rod (11) and within the contact carrier (3), ◯ to a second location (5') which is located on the side of the contact disc (1) facing the contact carrier (3) and is offset from the first location (8') to the outer edge of the contact disc (1), - wherein the additional support body (5, 8) is connected to the contact disc (1), and wherein - the additional support body (5,8) is connected to the contact carrier (3), characterized by that the additional support body (5,8) is designed in two parts, and the truncated cone or hollow truncated cones or partially hollow truncated cones by - a first additional support body (8) which is soldered to the contact carrier 3, and - a second additional support body (5) which is soldered to the contact disc 4 is formed, wherein the first additional support body (8) and the second additional support body (5) are soldered to one another. [2] Switch contact according to claim 1, wherein - the contact rod (11) is electrically connected to the contact carrier (3) by soldering, and / or - the contact disc (1) is electrically connected to the contact carrier (3) by soldering, and / or - the additional support body (5,8) is connected to the contact disc (1) by soldering, and / or - the additional support body (5,8) is connected to the contact carrier (3) by soldering. [3] Switching contact according to one of claims 1 to 2, wherein solder foils and / or solder rings (2, 4, 7, 9, 10) are provided to form solder connections between - the contact disc (1) and the additional support body (5,8), - the contact disc (1) and the contact carrier (3), - the first additional support body (8) and the second additional support body (5), - the additional support body (5,8) and the contact carrier (3), and - the contact carrier (3) and the contact rod (11). [4] Switching contact according to one of claims 1 to 3, wherein the soldering is carried out by a closure soldering in one step. [5] Vacuum interrupter with one or two switching contacts according to one of claims 1 to 4.

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