Corrugated pipe protection device for vacuum switch tube
By designing a bellows protection device containing a tapering area and a retaining area, the problem of the void tube easily damaged when the vacuum switch tube is installed is solved, and effective protection of the bellows and stable installation of the vacuum switch tube is achieved.
Patent Information
- Application Number
- CN202380067420.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-09-21
- Filing Date
- 2023-09-07
- Publication Date
- 2025-04-18
AI Technical Summary
In the prior art, vacuum switch tubes with external corrugated tubes are prone to damage during transportation, operation and assembly, especially in the installation state due to inclined positioning or axial offset of the moving contact rod.
A bellows protection device is designed, which includes a tapering first area for receiving and guiding the moving contact rod, and a second area for receiving the corrugated tube, and fixing the protection device to the vacuum switch tube by a retaining area to prevent the moving contact rod from tilting.
It effectively prevents the corrugated pipe from being damaged due to the tilt or axial offset of the moving contact rod, ensuring the safety of the corrugated pipe and the stability of the vacuum switch pipe.
Smart Images
Figure CN119856242A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a bellows protective device for a vacuum switching tube, a vacuum switching tube having such a bellows protective device, a switching device having a vacuum switching tube having such a bellows protective device, a stepping switch having a vacuum switching tube having such a bellows protective device, and a method for manufacturing a vacuum switching tube having such a bellows protective device. Background Art
[0002] Vacuum switching tubes with external bellows are known in the prior art. For such vacuum switching tubes with external bellows, there is a risk that the bellows and the vacuum switching tube may be damaged during transportation, handling and assembly, as well as during switching operations in the installed state, for example in switchgear or step switches. In the installed state, the bellows may be damaged, for example, due to an inclined positioning or axial offset of the moving contact rod relative to the axis of the vacuum switching tube. Summary of the invention
[0003] Therefore, the technical problem to be solved by the present invention is to eliminate the disadvantages of the prior art.
[0004] The above technical problem is solved by independent claim 1 and its dependent claims.
[0005] One aspect relates to a bellows protection device for a vacuum interrupter having an outer bellows for low, medium or high voltages, wherein
[0006] The bellows protection device at least has:
[0007] - a first region which is designed to taper and is also designed to accommodate a moving contact rod so that the moving contact rod can be guided from the inside of the bellows protector out of the bellows protector to a second side outside the bellows protector, wherein the first tapered region of the bellows protector is designed to abut against the moving contact rod so that the moving contact rod is guided through the bellows protector,
[0008] - a second region connected to the first region, wherein the second region is enlarged relative to the first region, so that the corrugated tube to be protected can be accommodated in the second region, and
[0009] - A holding region, wherein the holding region is designed to fix the bellows guard on or at the vacuum interrupter so that the bellows guard forms a guide for the moving contact rod.
[0010] In the sense of the present disclosure, guiding is understood to mean guiding the moving contact in a manner that prevents the moving contact rod from exceeding a predetermined angle relative to the longitudinal axis of the vacuum interrupter, thereby preventing the bellows from being damaged due to the tilting of the moving contact rod. This is achieved in particular in that the tapering area of the first region abuts against at least one portion, which, when used according to the invention, abuts against the moving contact rod and extends largely parallel to the longitudinal axis of the vacuum interrupter. Thus, the moving contact is arranged to be movable in the direction of the longitudinal axis by the bellows and is guided by the guide when moving along the longitudinal axis.
[0011] Accommodated or accommodated here means in particular that the bellows of the moving contact is arranged in an inner region, ie on the inside, of the bellows protection device.
[0012] The fixing of the bellows guard to the vacuum interrupter means that the bellows guard is not arranged to be movable together with the moving contact relative to a non-moving part of the vacuum interrupter, but the moving contact moves relative to the bellows guard. A possible rotation of the bellows guard around the vacuum interrupter can optionally be prevented by means of an additional locking device, wherein the additional locking device interacts with an additional locking device counterpart on the vacuum interrupter.
[0013] The bellows protection device can optionally have a cylindrical geometry on the inside which is adapted to the outer geometry of the vacuum interrupter.
[0014] Further optionally, the outer geometry of the bellows protector also has a cylindrical geometry.
[0015] Preferably, the bellows protection device has a guide region in the first region, which guide region is designed as a sliding bearing for the moving contact.
[0016] It is particularly preferred that the guide area is designed so that only the moving contact rod can pass through the guide area, while the fixed contact of the vacuum interrupter cannot pass through the guide area. This is achieved in particular by different shapes of the moving contact and the fixed contact.
[0017] It is also preferred that the first region has further grooves and / or the second region and / or the third region have grooves which allow gas to circulate between the inside of the bellows protection device and a second side outside the bellows protection device. In addition to the gas circulation, the grooves in the second and third regions also allow a targeted flexibility of the second and third regions, which makes assembly on the vacuum interrupter easier and still ensures that the bellows protection device fits sufficiently firmly on the vacuum interrupter.
[0018] It is also preferred that the bellows protector has ribs or webs on the inner side of the bellows protector and / or on the second side of the bellows protector that are perpendicular and / or parallel to the longitudinal axis of the vacuum interrupter. These ribs or webs are used to increase the mechanical stability of the bellows protector and / or extend the creepage distance.
[0019] It is also preferred that the bellows protection device is designed as a one-piece device, and the holding area is designed to extend from the moving contact side to the first insulator of the vacuum switch tube, and on the side of the first insulator opposite to the moving contact, the bellows protection device is engaged with the first insulator or a tube component adjacent to the first insulator by a joint piece, so that the bellows protection device is fixed to the vacuum switch tube. The tube component adjacent to the first insulator is particularly an intermediate element and / or another insulator and / or a shielding element and / or a fixed contact flange and / or a fixed contact rod. In particular, it is preferred that the joint piece
[0020] - on the side of the first insulator opposite to the movable contact, engaging with the engaging piece on the first insulator and fixing the bellows protector in this way, or
[0021] - On the side of the first insulator opposite to the moving contact, engage with the engagement piece on the flange of the stationary contact and in this way fix the bellows protector.
[0022] In other words, the engaging piece engages with one of the tube parts on the side of the first insulator opposite to the moving contact (also referred to as behind the first insulator), so that the bellows protection device is fixed to the vacuum interrupter.
[0023] It is also preferred that the bellows protection device is designed in multiple parts, in particular in two parts, wherein the bellows protection device has at least a first bellows protection element and a further bellows protection element, wherein the first bellows protection element and the further bellows protection element are connected or connectable to one another.
[0024] Advantageously, the first bellows protection element and the further bellows protection element can be connected to each other in the following manner: the first bellows protection element is joined together from the side with the moving contact and the further bellows protection element is joined together from the side opposite to the moving contact, i.e. can be joined together. It is particularly preferred that the further bellows protection element also has a first tapering region through which the fixed contact rod can be guided. Alternatively, instead of the fixed contact rod, the further moving contact rod can also be guided through the tapering region of the further bellows protection element, whereby the bellows protection device can also be used for vacuum switching tubes with two moving contacts.
[0025] It is also preferred that the connection between the first bellows protection element and the further bellows protection element is established by a positive connection or a force fit connection. In particular, the positive connection is formed by a locking connection having one or more locking members (i.e., engagement means) and one or more locking recesses. Alternatively, a threaded connection or other connection may also be provided.
[0026] It is further preferred that the bellows protection device is formed of an electrically insulating material and is designed to reduce or prevent discharge or partial discharge. In particular, the corresponding bellows protection device is used to reduce or prevent discharge or partial discharge between other components of the switchgear and the metal components of the vacuum switch tube.
[0027] The bellows protector is preferably formed from a plastic and is preferably produced using an injection molding process.
[0028] Another aspect relates to a vacuum switching tube, wherein the vacuum switching tube has a bellows protection device according to one of the above-mentioned embodiments.
[0029] It is particularly advantageous that the bellows protection device, in addition to protecting the bellows and guiding the moving contact rod, also simultaneously forms a transport protection, which additionally protects the entire vacuum interrupter. The guide of the moving contact rod is used here to avoid an inclined positioning or axial displacement of the moving contact rod relative to the longitudinal axis of the vacuum interrupter.
[0030] It is further preferred that the fixed contact of the vacuum interrupter has a first locking recess for accommodating the further engaging piece. The first locking recess is therefore used to fix the further bellows protection element in the multi-part, in particular two-part bellows protection device by means of the engaging piece on the vacuum interrupter. The first locking recess preferably has an inverse structure to the further engaging piece.
[0031] It is particularly preferred here if the vacuum switching tube is a vacuum switching tube for a low-voltage, medium-voltage or high-voltage switchgear assembly.
[0032] It is also particularly preferred here if the vacuum switching tube is a vacuum switching tube for a step switch, in particular a load step switch.
[0033] One aspect also relates to a switching device having a vacuum switching tube or a plurality of vacuum switching tubes according to one of the above embodiments, the vacuum switching tube having a bellows protection device according to one of the above embodiments.
[0034] Another aspect relates to a stepping switch having one or more vacuum switching tubes, wherein one or more of the vacuum switching tubes has a bellows protection device according to one of the above-described embodiments.
[0035] Another aspect relates to a method for producing a vacuum switching tube with a bellows protection device, wherein the bellows protection device according to one of the above-described embodiments is fixed to the vacuum switching tube. In particular, it is preferred that the bellows protection device is fixed to the vacuum switching tube by pushing it onto the vacuum switching tube, in particular by locking it onto the vacuum switching tube.
[0036] The fixing of the bellows protection device to the vacuum interrupter means that the bellows protection device does not move relative to the non-moving parts of the vacuum interrupter, but the moving contact moves relative to the bellows protection device and relative to the non-moving parts of the vacuum interrupter. The non-moving parts of the vacuum interrupter are, for example, the first insulator, the further insulator, the intermediate element or the fixed contact.
[0037] With regard to the device according to the invention, all embodiments stated above and below with regard to the method according to the invention apply in a corresponding manner, and vice versa. With regard to the advantages of the device according to the invention, reference is also made to the advantages described for the method according to the invention, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] The present invention is explained in more detail below based on embodiments. The specific design of the embodiments should not be understood as limiting the overall design of the method according to the invention and the device according to the invention in any way; on the contrary, the individual design features of the embodiments can be freely combined with each other and with the features described above in any way.
[0039] Figure 1 A schematic diagram of a switchgear is shown;
[0040] Figure 2 A schematic diagram of a vacuum switching tube according to the prior art is shown;
[0041] Figure 3 A schematic diagram of a vacuum switch tube with an integrated bellows protection device is shown;
[0042] Figure 4 A schematic diagram of a vacuum interrupter with a two-part bellows protection is shown. DETAILED DESCRIPTION
[0043] Figure 1A schematic diagram of a switchgear 1 is shown, a medium-voltage switchgear being shown here as an example, but switchgear for low or high voltage is also possible, which has a vacuum switching tube for switching on or off a current and / or a voltage. The switchgear can in particular contain one or more vacuum switching tubes as switching elements, in particular vacuum switching tubes designed as load switches or circuit breakers. The switchgear has a display element 4, which can contain a display such as a pressure display, a switch position display or other status display. The switchgear also has a control panel 6, via which, for example, a switching operation can be performed.
[0044] Figure 2 A schematic diagram of a vacuum interrupter 10' according to the prior art is shown. The vacuum interrupter 10' has a cylindrical basic shape with a longitudinal axis 90. The stationary contact rod 34 extends along or parallel to the longitudinal axis 90, and the stationary contact rod 34 is guided into the interior of the vacuum interrupter 10' through the stationary contact flange 38. The stationary contact disc 36 is connected to the stationary contact rod 34. The moving contact disc 32 on the moving contact rod 30 is connected to the stationary contact disc 36. The moving contact rod 30 together with the moving contact disc 32 is movably arranged on the first insulator 40 via the moving contact flange 31 with the external bellows 20 and the bellows shielding element 43, in particular welded. In Figure 2 In the example shown, an intermediate element 42 (here a metallic intermediate element 42) is connected to the first insulator 40 (here an insulator made of ceramic material, i.e. a ceramic insulator), which intermediate element 42 at the same time forms a further shielding element 42' inside the vacuum interrupter 10', which further shielding element 42' radially surrounds the stationary contact disk 36 and the moving contact disk 32 at a distance, at least in the position in which the stationary contact disk 36 and the moving contact disk 32 are in contact and the vacuum interrupter 10' is in the closed (i.e. conductive) state. The further shielding element formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or the further insulator 50 in the event of a switching arc.
[0045] In this case, a further insulator 50 is connected to the intermediate element 42 .
[0046] The shielding element 39 is connected here to a further insulator 50. The shielding element 39 also serves here as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and the further insulator 50 can also be omitted and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0047] Figure 3 A schematic diagram of a vacuum interrupter 10 according to the present invention is shown, which has an integrated bellows protection device 100 according to the present invention.
[0048] The structure of the vacuum switching tube 10 is different from that according to the prior art and Figure 2 The structure of the vacuum interrupter 10' is similar. The vacuum interrupter 10 here has a cylindrical basic shape with a longitudinal axis 90. The stationary contact rod 34 extends along or parallel to the longitudinal axis 90, and the stationary contact rod 34 is guided into the interior of the vacuum interrupter 10 through the stationary contact flange 38. The stationary contact rod 34 is connected to the stationary contact disk 36. The moving contact disk 32 on the moving contact rod 30 is connected to the stationary contact disk 36. The moving contact rod 30 together with the moving contact disk 32 is movably arranged on the first insulator 40 through the moving contact flange 31 with the external bellows 20, in particular welded. The bellows shielding element 43 is arranged between the bellows 20 and the first insulator 40. In Figure 3 In the example shown, an intermediate element 42, here a metallic intermediate element 42, is connected to a first insulator 40, here an insulator made of a ceramic material, i.e. a ceramic insulator. Inside the vacuum interrupter 10, the intermediate element 42 here simultaneously forms an additional shielding element 42', or one or more additional shielding elements 42' are arranged on the intermediate element. The arrangement of the additional shielding element 42' is designed so that, at least in the position in which the stationary contact disc 36 and the moving contact disc 32 are in contact and the vacuum interrupter 10 is in the closed state (i.e. the conducting state), the stationary contact disc 36 and the moving contact disc 32 are radially surrounded at a distance. The additional shielding element formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or the additional insulator 50 in the event of a switching arc.
[0049] In this case, a further insulator 50 is connected to the intermediate element 42 .
[0050] The shielding element 39 is connected here to a further insulator 50. The shielding element 39 also serves here as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and the further insulator 50 can also be omitted and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0051] Figure 3 The bellows protection device 100 according to the present invention is also shown. The bellows protection device 100 is designed as an integral body and is divided into three areas. Here, a part of the vacuum switch tube 10 is located on the inner side 101 of the bellows protection device 100, and the moving contact rod 30 is guided from the inner side 101 of the bellows protection device 100 through the bellows protection device 100 to the second side 102 outside the bellows protection device 100.
[0052] The first region 110 of the bellows protector 100 has a tapering, wherein the diameter of the bellows protector 100 in the first region 110 is reduced from the diameter for accommodating the bellows 20 to the diameter for guiding the moving contact rod 30. A guide, i.e. a bearing 112 for the moving contact rod 30, is thereby formed. Optionally, further grooves 155 for the gas flow in the bellows protector 100 can be provided in the first region 110. Optionally, these further grooves 155 in the first region 110 can also be used to make the bellows protector 100 for guiding the moving contact rod 30 flexible.
[0053] In the second region 120 of the bellows guard 100 , the bellows guard extends largely parallel to the longitudinal axis 90 of the vacuum interrupter.
[0054] Here, the holding region 130 has a coupling 140 on the side facing the longitudinal axis 90 of the vacuum interrupter 10, which is guided from the side with the moving contact rod 30 and the bellows 20 to the first insulating body 40 and locked behind the first insulating body 40, thereby fixing the bellows protection device 100 on or at the vacuum interrupter 10. In order to enable the holding region 130 to be guided on the first insulating body 40, the bellows protection device 100 has a groove 150, which here extends from the starting point 125 of the groove 150 to the end of the bellows protection device 100 having one or more couplings 140. In particular, there are a large number of grooves 150, in particular 4, 5, 6, 7 or more grooves 150. Thus, a ring is formed consisting of flexible holding elements 130, each of which has a coupling 140, which enables a secure fit on the vacuum interrupter 10 and at the same time an uncomplicated assembly.
[0055] Figure 4 A schematic diagram of a vacuum interrupter 10 according to the invention is shown, which has a two-part bellows protection device 200 according to the invention.
[0056] The structure of the vacuum switching tube 10 is largely similar to that known from the prior art. Figure 2 The vacuum switch tube 10' and Figure 3 Vacuum switching tube 10. However, unlike the previously described figures, the fixed contact rod 34 has a first locking recess 35 for accommodating a further engagement piece 275 and for fixing a further bellows protection element 270 in the case of a multi-part (here two-part) bellows protection device.
[0057] The vacuum interrupter 10 has a cylindrical basic shape with a longitudinal axis 90. The fixed contact rod 34 extends along or parallel to the longitudinal axis 90, and is guided into the interior of the vacuum interrupter 10 through a fixed contact flange 38. The fixed contact disc 36 is connected to the fixed contact rod 34. The moving contact disc 32 on the moving contact rod 30 is connected to the fixed contact disc 36. The moving contact rod 30 together with the moving contact disc 32 is movably arranged on the first insulator 40 via the moving contact flange 31 with the outer bellows 20, in particular welded. The bellows shielding element 43 is arranged between the bellows 20 and the first insulator 40. In Figure 4 In the example shown, an intermediate element 42, here a metallic intermediate element 42, is connected to a first insulator 40, here an insulator made of a ceramic material, i.e. a ceramic insulator. Inside the vacuum interrupter 10, the intermediate element 42 here simultaneously forms a further shielding element 42', or one or more further shielding elements 42' are arranged on the intermediate element. The arrangement of the further shielding element 42' is designed here in such a way that the stationary contact disc 36 and the moving contact disc 32 are radially surrounded at a distance, at least in the position in which the stationary contact disc 36 and the moving contact disc 32 are in contact and the vacuum interrupter 10 is in the closed state, i.e. the conducting state. The further shielding element 42' formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or the further insulator 50 in the event of a switching arc.
[0058] In this case, a further insulator 50 is connected to the intermediate element 42 .
[0059] The shielding element 39 is connected here to a further insulator 50. The shielding element 39 also serves here as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and the further insulator 50 can also be omitted and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0060] Figure 4 A two-part bellows protection device 200 according to the invention is also shown as an example of a multi-part bellows protection device. The bellows protection device 200 is formed here by a first bellows protection element 260 and a further bellows protection element 270. The first bellows protection element 260 is divided into three areas. Here, a part of the vacuum interrupter 10 is located on the inner side 201 of the bellows protection device 200, while the moving contact rod 30 and the fixed contact rod 34 are guided from the inner side 201 of the bellows protection device 200 through the bellows protection device 200 to the second side 202 outside the bellows protection device 200.
[0061] The first region 210 of the bellows protector 200 has a tapering portion, wherein the diameter of the bellows protector 200 in the first region 210 is reduced from the diameter for accommodating the bellows 20 to the diameter for guiding the moving contact rod 30. A guide, i.e. a bearing 212, for the moving contact rod 30 is thereby formed. Optionally, further grooves 255 may be provided in the first region 210 for the gas flow in the bellows protector 200. Optionally, these further grooves 255 in the first region 210 may also be used to make the bellows protector 200 for guiding the moving contact rod 30 flexible.
[0062] In the second region 220 of the bellows guard 200 , the bellows guard extends largely parallel to the longitudinal axis 90 of the vacuum interrupter.
[0063] The holding region 230 has here, on the side facing the longitudinal axis 90 of the vacuum interrupter 10, an engagement piece 140 which, starting from the side with the moving contact rod 30 and the bellows 20, is at least partially guided to the first insulating body 40 and locked into a second locking recess 141 of the further bellows protection element, thereby fixing the first bellows protection element 260 of the multi-part bellows protection device 200 on the further bellows protection element 270 and thus on or at the vacuum interrupter 10. The further bellows protection element 270 is fixed to the fixed contact rod 34 by means of a further engagement piece 275 in the first locking recess 35 and expands in the direction of the moving contact flange 31 in order to accommodate a part of the vacuum interrupter 10. Furthermore, the further bellows protection element 270 preferably has a further recess 142, so that the second locking recess is arranged in the region of the further recess 142, here at the end facing the moving contact flange 31. Further preferably, the first bellows protection element 260 has a first recess 262, wherein the engagement element 140 is arranged in the first recess 262. This design allows the first bellows protection element 260 to be locked with the further bellows protection element 270 for fixing on the vacuum interrupter 10 and to be locked therein. Alternatively, complementary threads are present in the first recess 262 and the further recess 142, so that the first bellows protection element 260 can be connected to the further bellows protection element 270 by means of a threaded connection.
[0064] In order to enable the holding region 230 to be guided on the first insulating body 40 and the first bellows protection element 260 to be locked with the further bellows protection element 270, the first bellows protection element 260 has a groove 250, which here extends from the starting point 125 of the groove 250 to an end of the first bellows protection element 260 having one or more engagement pieces 140. In particular, there are a large number of grooves 250, in particular 4, 5, 6, 7 or more grooves 250. Thus, a ring is formed on the flexible holding element 230, which each has an engagement piece 140, which enables a secure fit on the vacuum interrupter 10 and at the same time enables an uncomplicated assembly.
[0065] Reference numerals list
[0066] 1. Switchgear;
[0067] 4 display components;
[0068] 6. Control panel;
[0069] 10 vacuum switch tube;
[0070] 10' Vacuum switching tube according to the prior art;
[0071] 20 bellows, an external bellows of the vacuum switch tube 10, 10';
[0072] 30 moving contact rod;
[0073] 31 moving contact flange;
[0074] 32 moving contact plate;
[0075] 34 static contact rod;
[0076] 35 a first locking recess in the stationary contact rod 34;
[0077] 36 static contact plate;
[0078] 38: stationary contact flange;
[0079] 39 shielding element;
[0080] 40 A first insulator of the vacuum switching tube 10, 10', in particular made of a ceramic material;
[0081] 42 intermediate components, especially metal intermediate components;
[0082] 42 ′ additional shielding element on the intermediate element 42 ;
[0083] 43 a bellows shielding element between the bellows 20 and the first insulator 40;
[0084] 50 another insulator of the vacuum switching tube 10, 10', in particular made of a ceramic material;
[0085] 90 longitudinal axis of the vacuum switching tube 10, 10';
[0086] 100 bellows protection device;
[0087] 101 inner side of the bellows protection device 100;
[0088] 102 a second side of the exterior of the bellows protection device 100;
[0089] 110 a first region of the bellows protection device 100;
[0090] 112 is a bearing for a moving contact rod 30;
[0091] 120 a second region of the bellows protection device 100;
[0092] 125 slot 150 starting point;
[0093] 130: holding area of the bellows protection device 100;
[0094] 140 holding the engaging member on the region 130 or 230;
[0095] 141 second locking recess in the further bellows protection element 270;
[0096] 142 another recess in another bellows protection element 270;
[0097] 150 groove, in particular for gas flow in the bellows protection device 100;
[0098] 155 additional grooves, in particular for gas flow in the bellows protection device 100;
[0099] 200 Bellows protection device for a multi-part design of a vacuum switching tube 10;
[0100] 201 inner side of the bellows protection device 200;
[0101] 202 a second side of the exterior of the bellows protection device 200;
[0102] 210 a first region of the bellows protection device 200;
[0103] 212 is a bearing for a moving contact rod 30;
[0104] 220 a second region of the bellows protection device 200;
[0105] 230: holding area of the bellows protection device 200;
[0106] 240 holding the engaging member on the region 230;
[0107] 250 slots for gas flow in the first bellows protection element 260;
[0108] 255 additional grooves for gas flow in the first bellows protection element 260;
[0109] 260 a first bellows protection element of the multi-part bellows protection device 200;
[0110] 262 a first recess in the first bellows protection element 260;
[0111] 270 A further bellows protection element of the multi-part bellows protection device 200;
[0112] 275 is used to lock into the other engagement member of the first locking recess 35 of the stationary contact rod 34;
[0113] 278 Second further groove, in particular for the gas flow in the further bellows protection element 270 .
Claims
1. A bellows protection device (100, 200) for a vacuum interrupter (10), the vacuum interrupter having an external bellows (20) for low pressure, medium pressure or high pressure, It is characterized in that The bellows protection device (100, 200) at least comprises: - a first region (110), the first region being designed to taper gradually and also being designed to accommodate a moving contact rod (30), so that the moving contact rod (30) can pass through the bellows protection device (100, 200) from the inner side (101) of the bellows protection device (100, 200) and be guided to a second side (102) outside the bellows protection device, wherein the first tapered region (110) of the bellows protection device (100, 200) is designed to abut against the moving contact rod (30), so that the moving contact rod (30) is guided through the bellows protection device (100, 200), - a second region (120) connected to the first region (110), wherein the second region (120) is enlarged relative to the first region (110) so that the corrugated tube (30) to be protected can be accommodated in the second region (120), and - a holding region (130), wherein the holding region is designed to fix the bellows protection device (100, 200) on or at the vacuum interrupter (10) so that the bellows protection device (100, 200) forms a guide for the moving contact rod (30).
2. The bellows protection device (100, 200) according to claim 1, It is characterized in that The bellows protection device (100, 200) has a guide area (112) in the first area (110), wherein the guide area is designed as a sliding bearing for the moving contact (30).
3. The bellows protection device (100, 200) according to claim 1 or 2, It is characterized in that The first region (110) has further grooves (155), and / or the second region (120) and / or the third region (130) have grooves (150) which allow gas to circulate between an inner side (101) of the bellows protector (100) and a second side (102) outside the bellows protector (100, 200).
4. The bellows protection device (100, 200) according to any one of the preceding claims, It is characterized in that The bellows protector has ribs on the inner side (101) of the bellows protector (100, 200) and / or on the second side (102) of the bellows protector (100, 200) which are perpendicular to and / or parallel to the longitudinal axis (90) of the vacuum interrupter (100).
5. The bellows protection device (100) according to any one of the preceding claims, It is characterized in that The bellows protection device (100) is designed as a one-piece device, and the retaining area (130) is designed to extend from the moving contact side to the first insulator (40), and on the side of the first insulator (40) opposite to the moving contact, the bellows protection device is joined to the first insulator (40) or to a tube part adjacent to the first insulator (40) by means of a joining piece (140), so that the bellows protection device can be fixed to the vacuum switch tube.
6. The bellows protection device (200) according to any one of claims 1 to 4, It is characterized in that The bellows protection device (200) is designed in multiple parts, wherein the bellows protection device (200) has at least a first bellows protection element (260) and a further bellows protection element (270), wherein the first bellows protection element (260) and the further bellows protection element (270) are connected to one another or can be connected to one another.
7. The bellows protection device (100, 200) according to any one of the preceding claims, It is characterized in that The bellows protector (100, 200) is formed of an electrically insulating material and is designed to reduce or prevent electrical discharge or partial discharge.
8. A vacuum switch tube (10), It is characterized in that The vacuum interrupter comprises a bellows protection device (100, 200) according to any one of claims 1 to 7.
9. A switchgear (1), comprising a vacuum interrupter (10) according to claim 8, wherein the vacuum interrupter comprises a bellows protection device (100, 200) according to any one of claims 1 to 7.
10. A stepping switch (1), comprising one or more vacuum switching tubes (10) according to claim 8, wherein: One or more of the vacuum interrupters has a bellows protection device (100, 200) according to any one of claims 1 to 7.
11. A method for manufacturing a vacuum switch tube having a bellows protection device, It is characterized in that The bellows protection device according to any one of claims 1 to 7 is fixed to a vacuum interrupter.