Vacuum interrupter opening and holding device and assembly method of vacuum interrupter

Abstract

This application relates to a tripping and holding device for a vacuum interrupter and an assembly method for the vacuum interrupter. The tripping and holding device includes a support body with a limiting part for engaging with a locking part. The end of the support body facing the moving contact abuts against a guide assembly to keep the moving contact separated from the stationary contact. This application, through its tripping and holding device, enables the moving contact to remain separated from the stationary contact, thereby ensuring that there is no friction between the moving and stationary contacts when assembling other components of the vacuum interrupter, which is beneficial for improving the insulation performance of the vacuum interrupter.

Description

Technical Field

[0001] This application relates to the field of vacuum interrupter technology, and in particular to a tripping and holding device for a vacuum interrupter and an assembly method for a vacuum interrupter. Background Technology

[0002] The vacuum interrupter is the core component of the entire vacuum circuit breaker, and its performance directly affects the performance and service life of the vacuum circuit breaker. After the vacuum interrupter is sealed, it needs to undergo processes such as power frequency voltage aging, impulse voltage aging, and even high current aging to improve its insulation performance before the vacuum circuit breaker is assembled.

[0003] Because the vacuum level inside the vacuum interrupter reaches 10... -3 ~10 -4 Under atmospheric pressure, a force is generated that causes the moving contact to close automatically with the stationary contact, known as the self-closing force. This keeps the moving and stationary contacts of the vacuum interrupter in a closed state. Additionally, because the moving contact rod and bellows of the vacuum interrupter are brazed together, with the bellows being an elastic element, the moving contact rod is not fixed. Therefore, during the assembly of other components at the moving end of the vacuum interrupter and the subsequent assembly of the vacuum circuit breaker's moving support, friction occurs between the moving and stationary contacts, causing scratches on the contact surface and even generating tiny metal particles. This reduces the insulation performance of the vacuum interrupter, thus affecting the performance of the vacuum circuit breaker. Summary of the Invention

[0004] Therefore, it is necessary to address the problem that friction between the moving and stationary contacts of the vacuum interrupter can occur during the assembly of other components at the moving end of the vacuum interrupter and the subsequent assembly of the moving support of the vacuum circuit breaker, resulting in scratches on the contact surface and even the generation of tiny metal particles. This issue requires the provision of a tripping and holding device for the vacuum interrupter and an assembly method for the vacuum interrupter.

[0005] This application first provides a tripping and holding device for a vacuum interrupter. The vacuum interrupter includes a housing, a stationary contact assembly, and a moving contact assembly. A guide assembly is also provided outside the housing. The stationary contact assembly includes a stationary contact. The moving contact assembly includes a moving contact rod and a moving contact. One end of the moving contact rod, which is away from the moving contact, is exposed outside the guide assembly and is provided with a snap-fit ​​portion.

[0006] The tripping and holding device includes:

[0007] The support body is provided with a limiting part, which is used to engage with the locking part. The end of the support body facing the moving contact is used to abut against the guide component so that the moving contact and the stationary contact remain separated.

[0008] In one embodiment, the support body includes a first body and a second body with the same structure, and the first body and the second body are provided with the limiting part;

[0009] The tripping retaining device further includes a fastener, which is used to connect the first body and the second body when the first body and the second body clamp the moving contact bar, so as to keep the moving contact and the stationary contact separated.

[0010] In one embodiment, the snap-fit ​​portion is a slot formed on the sidewall of the moving contact bar;

[0011] The limiting part is a boss formed on the first body and the second body;

[0012] The boss is adapted to engage with the slot.

[0013] In one embodiment, the first body and the second body each include a first end and a second end opposite to each other, and a mating plane connecting the first end and the second end, wherein the mating plane of the first body and the mating plane of the second body are arranged opposite to each other.

[0014] The mating plane has an arc-shaped notch, and the boss is located at the first end of the first body and the second body, and extends into the arc-shaped notch.

[0015] In one embodiment, the sidewall of the moving contact bar has two symmetrical slots;

[0016] The protrusions on the first body and the second body engage with the two corresponding slots.

[0017] In one embodiment, the sidewall of the moving contact bar has two symmetrical cuts located between the two slots;

[0018] The first body and the second body are provided with a limiting platform at the arc-shaped notch. The limiting platform is connected to the boss and is used to contact the notch.

[0019] In one embodiment, the guide assembly includes a fixed flange and a guide sleeve, the fixed flange being located outside the guide sleeve, and the fixed flange and the guide sleeve forming a through hole for the moving contact bar to pass through;

[0020] The second ends of the first body and the second body are used to abut against the end face of the fixed flange.

[0021] In one embodiment, the outer end face of the fixed flange is provided with a plurality of connectors, which are used to connect the fixed flange and the guide sleeve;

[0022] The second end of the first body and the second body is provided with an abutment platform, which is used to abut against the end face of the fixed flange other than the connecting member.

[0023] In one embodiment, the first end of the first body and the second body is formed with at least two clearance grooves to form a mounting hole between the groove wall of the clearance groove and the mating plane, the mounting hole being for the fastener to pass through.

[0024] This application also provides an assembly method for a vacuum interrupter, using the opening and closing holding device for a vacuum interrupter described in the above embodiments. The assembly method includes:

[0025] Fixed stationary contact assembly;

[0026] The fastener is connected to the mounting part at the end of the moving contact bar, and the fastener is driven to move by a drive mechanism;

[0027] The drive mechanism is controlled to move the moving contact bar a preset distance away from the stationary contact.

[0028] The circuit breaker holding device is installed on the moving contact bar, and the limiting part of the support body is engaged with the locking part, and the support body abuts against the guide assembly.

[0029] Remove the fasteners to keep the stationary and moving contacts separated.

[0030] The aforementioned opening and holding device for a vacuum interrupter and the assembly method of the vacuum interrupter utilize a limiting part on the support body. When the moving contact rod contacts external equipment and moves away from the stationary contact assembly, this limiting part, in conjunction with the snap-fit ​​part on the moving contact rod, achieves relative fixation of the support body on the moving contact rod. Furthermore, by having the support body abut against the guide assembly at the end facing the moving contact, the outer end of the moving contact rod can be maintained in the open position, thereby keeping the moving and stationary contacts separated. This facilitates the assembly of other components onto the moving end of the vacuum interrupter. This opening and holding device ensures that the moving and stationary contacts remain separated, preventing friction between them during the assembly of other components of the vacuum interrupter and improving the insulation performance of the vacuum interrupter. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a vacuum interrupter provided according to some embodiments of this application.

[0032] Figure 2 This is a schematic diagram of a circuit breaker holding device disposed in a vacuum interrupter according to some embodiments of this application.

[0033] Figure 3 This is a schematic diagram of the structure of a tripping and holding device provided according to some embodiments of this application.

[0034] Figure 4 This is one of the structural schematic diagrams of the tripping and holding device from another perspective, according to some embodiments of this application.

[0035] Figure 5 This is a schematic diagram of the tripping and holding device from another perspective, according to some embodiments of this application.

[0036] Figure 6 This is a top view of the tripping and holding device provided according to some embodiments of this application.

[0037] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of AA.

[0038] Figure 8 This is a front view structural diagram of a first body or a second body provided according to some embodiments of this application.

[0039] Figure 9 This is a schematic flowchart illustrating the assembly method of a vacuum interrupter according to some embodiments of this application.

[0040] Icon labels:

[0041] 10. Vacuum interrupter; 11. Housing; 12. Moving contact rod; 121. Snap-fit ​​part; 13. Guide assembly; 131. Connector;

[0042] 200. Support body; 201. Limiting part; 210. First body; 220. Second body; 202. Arc-shaped notch; 203. Limiting platform; 204. First end; 205. Second end; 206. Mounting hole; 207. Abutment platform; 208. Clearance groove. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0049] Because the vacuum level inside the vacuum interrupter reaches 10... -3 ~10 -4 Under atmospheric pressure, a force is generated that causes the moving contact to close automatically with the stationary contact, known as the self-closing force. This keeps the moving and stationary contacts of the vacuum interrupter in a closed state. Additionally, because the moving contact rod and bellows of the vacuum interrupter are brazed together, with the bellows being an elastic element, the moving contact rod is not fixed. Therefore, during the assembly of other components at the moving end of the vacuum interrupter and the subsequent assembly of the vacuum circuit breaker's moving support, friction occurs between the moving and stationary contacts, causing scratches on the contact surface and even generating tiny metal particles. This reduces the insulation performance of the vacuum interrupter, thus affecting the performance of the vacuum circuit breaker.

[0050] See Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of a vacuum interrupter provided according to some embodiments of this application. Figure 2 This is a schematic diagram of a circuit breaker holding device disposed in a vacuum interrupter according to some embodiments of this application. Figure 3 This is a schematic diagram of the structure of a tripping and holding device provided according to some embodiments of this application. One embodiment of this application first provides a tripping and holding device for a vacuum interrupter 10. The vacuum interrupter 10 includes a housing 11, a stationary contact assembly, and a moving contact assembly. A guide assembly 13 is also provided outside the housing 11. The stationary contact assembly includes a stationary contact, and the moving contact assembly includes a moving contact rod 12 and a moving contact. One end of the moving contact rod 12, facing away from the moving contact, is exposed outside the guide assembly 13 and is provided with a locking portion 121. This tripping and holding device may include a support body 200.

[0051] The support body 200 is provided with a limiting part 201, which is used to engage with the locking part 121. The end of the support body 200 facing the moving contact is used to abut against the guide assembly 13 so that the moving contact and the stationary contact are kept separate.

[0052] It is understandable that the tripping and holding device, as a tooling used in the assembly of the vacuum interrupter 10, enables the moving contact and the stationary contact to remain in the tripped state, thereby facilitating the assembly of other components on the moving end (the end where the moving contact assembly is located) of the vacuum interrupter 10, as well as subsequent vacuum circuit breaker manufacturing devices.

[0053] To clearly describe the location of the tripping and holding device, the structure of the vacuum interrupter 10 is first introduced, including a housing 11, a stationary contact assembly, and a moving contact assembly. The stationary and moving contact assemblies are arranged opposite to each other. The stationary contact assembly includes a stationary contact rod and a stationary contact, while the moving contact assembly includes a moving contact rod 12 and a moving contact. Under the action of self-closing force, the stationary and moving contacts come into contact, i.e., they are in a closed state. However, the moving contact rod can move relative to the housing 11, and a guide assembly 13 is provided outside the housing 11 to limit the movement direction of the contact rod. This guide assembly 13 may include a guide sleeve and a fixing flange for fixing the guide sleeve. Of course, to facilitate the movement of the moving contact rod 12, the guide assembly 13 is constructed with an opening adapted to the moving contact rod 12. The specific structure of the vacuum interrupter 10 can be understood by referring to relevant technologies, and will not be repeated here.

[0054] In the initial state of contact between the moving contact and the stationary contact, the outer end of the moving contact rod 12 can protrude from the guide assembly 13 by one end or be flush with the guide assembly 13. The exposed end of the moving contact rod 12 facilitates the connection of external equipment to the end of the moving contact rod 12, thereby driving the moving contact rod 12 to move away from the stationary contact, thus providing installation space for installing the tripping and holding device at the outer end of the moving contact rod 12, that is, the outer end of the moving contact rod 12 is in the tripped position.

[0055] Specifically, a locking part 121 is provided at the outer end of the moving contact rod 12 or on the side wall near the outer end. When the outer end of the moving contact rod 12 is in the open position, the locking part 121 is used to lock with the limiting part 201 of the support body 200. Combined with the guide component 13 abutting against the end of the support body 200 facing the moving contact, the support body 200 is locked between the guide component 13 and the locking part 121 of the moving contact rod 12, so that the outer end of the moving contact rod 12 is kept in the open position, that is, the moving contact is kept separated from the stationary contact.

[0056] The snap-fit ​​part 121 can be an annular protrusion provided on the outside of the moving contact bar 12, and the support body 200 can be an arc-shaped block with a certain height along the axial direction of the moving contact bar 12. The arc-shaped block can fit and cover part of the moving contact bar 12. The upper end of the arc-shaped block abuts against the annular protrusion, and the lower end of the arc-shaped block abuts against the guide assembly 13, so as to keep the outer end of the moving contact bar 12 in the open position through the arc-shaped block.

[0057] In addition, to increase the stability of the support body 200 at the end of the moving contact rod 12, multiple limiting holes can be opened on the annular boss. The limiting part 201 of the support body 200 is designed as a positioning post that matches the limiting hole. When the moving contact rod 12 moves away from the stationary contact through an external device, that is, when a space is formed between the snap-fit ​​part 121 and the guide component 13 to install the support body 200, the positioning post is embedded in the limiting hole of the annular boss, thereby achieving stable placement of the support body 200 between the snap-fit ​​part 121 and the guide component 13 of the moving contact rod 12.

[0058] In addition to the above method, the locking part 121 can be a slot formed on the outside of the moving contact bar 12, and the support body 200 can have a boss that can be inserted into the slot. The support body 200 can be an arc-shaped block with a certain height along the axial direction of the moving contact bar 12. The boss is located at the top of the arc-shaped block, and the bottom end of the arc-shaped block abuts against the guide component 13, so that the outer end of the moving contact bar 12 is kept in the open position.

[0059] Of course, to further enhance the stability of the support body 200 between the snap-fit ​​portion 121 of the moving contact bar 12 and the guide assembly 13, two support bodies 200 with identical structures can be set to clamp the moving contact bar 12. That is, the two support bodies 200 are symmetrically arranged about the moving contact bar 12. The specific structure can be understood by referring to the following example.

[0060] In this application, by providing a limiting part 201 on the support body 200, when the moving contact rod 12 contacts an external device and moves away from the stationary contact, the limiting part 201, in conjunction with the snap-fit ​​part 121 on the moving contact rod 12, achieves relative fixation of the support body 200 on the moving contact rod 12. Furthermore, by having the support body 200 abut against the guide assembly 13 at the end facing the moving contact, the outer end of the moving contact rod 12 can be maintained in the open position, thereby keeping the moving contact and stationary contact separated. This facilitates the assembly of other components onto the moving end of the vacuum interrupter 10. This open-stop holding device keeps the moving contact and stationary contact in a separated state, ensuring that there is no friction between the moving contact and stationary contact when assembling other components of the vacuum interrupter 10, which is beneficial for improving the insulation performance of the vacuum interrupter 10.

[0061] Below, we will combine the appendix Figure 1 - Appendix Figure 8 The specific structure of the tripping and holding device provided in the embodiments of this application will be described.

[0062] Combination Figure 4 and Figure 5 As shown, Figure 4 This is one of the structural schematic diagrams of the tripping and holding device from another perspective, according to some embodiments of this application. Figure 5This is a schematic diagram of the opening and holding device from another perspective according to some embodiments of this application. In some embodiments, the support body 200 includes a first body 210 and a second body 220 with identical structures, and the first body 210 and the second body 220 are provided with a limiting part 201; the opening and holding device also includes a fastener, which is used to connect the first body 210 and the second body 220 when the first body 210 and the second body 220 clamp the moving contact bar 12, so as to keep the moving contact and the stationary contact separated.

[0063] Specifically, the first body 210 and the second body 220, which have the same structure, can clamp the moving contact rod 12. After the limiting part 201 on the first body 210 and the second body 220 is engaged with the locking part 121 on the moving contact rod 12, and after the ends of the first body 210 and the second body 220 abut against the guide component 13, the first body 210 and the second body 220 are fastened together by fasteners. This not only makes the first body 210 and the second body 220 stable at the moving contact rod 12, which is conducive to clamping the moving contact rod 12, but also facilitates subsequent disassembly.

[0064] It should be noted that the fasteners in this example can be fastening bolts, buckles, etc., and there are no restrictions.

[0065] like Figure 1 and Figure 4 As shown, in some embodiments, the snap-fit ​​portion 121 is a snap-fit ​​groove formed on the side wall of the moving contact rod 12; the limiting portion 201 is a boss formed on the first body 210 and the second body 220; the boss and the snap-fit ​​groove are adapted to snap-fit.

[0066] Specifically, the locking part 121 can be an annular groove formed on the side wall of the moving contact bar 12, and this annular groove can be located near the outer end of the moving contact bar 12. To fit into the groove, the limiting part 201 can be a boss formed on the first body 210 and the second body 220. The groove and the boss fix the first body 210 and the second body 220 relative to each other on the outside of the moving contact bar 12. Combined with the contact between the first body 210, the second body 220, and the guide assembly 13, the outer end of the moving contact bar 12 can be limited to the open position. This arrangement not only facilitates the subsequent disassembly of the open holding device, but also facilitates the fastening of the two bodies together with fasteners, thus improving assembly and disassembly efficiency while clamping the moving contact bar 12.

[0067] Combination Figure 6 and Figure 7 As shown, Figure 6 This is a top view of the tripping and holding device provided according to some embodiments of this application. Figure 7 for Figure 6A cross-sectional view of AA is shown. In some embodiments, the first body 210 and the second body 220 each include a first end 204 and a second end 205, and a mating plane connecting the first end 204 and the second end 205. The mating plane of the first body 210 and the mating plane of the second body 220 are disposed opposite to each other. The mating plane is constructed with an arc-shaped notch 202, and the boss is located at the first end 204 of the first body 210 and the second body 220 and extends into the arc-shaped notch 202.

[0068] Specifically, for ease of description of the structure of the first body 210 and the second body 220, and assuming that the structures of the first body 210 and the second body 220 are identical, the structure of the first body 210 will be used as an example. Along the axial direction of the moving contact bar 12, the first body 210 includes a first end 204 and a second end 205, with the mating plane being the side opposite to the second body 220, which can also be understood as the side facing the moving contact bar 12. The distance between the first end 204 and the second end 205 can be understood as the distance by which the moving contact bar 12 is moved away from the stationary contact by an external device. This distance does not need to be too large; it is only necessary to ensure that the moving contact and the stationary contact are separated.

[0069] More specifically, the first body 210 can be configured as a semi-disc shape, that is, the first body 210 and the second body 220 can be docked to form a disc shape. An arc-shaped notch 202 is constructed at the semi-circular plane, that is, the docking plane. The arc-shaped notch 202 is used to cover part of the moving contact rod 12, or to make the first body 210 fit against the moving contact rod 12 to clamp the moving contact rod 12.

[0070] To achieve effective engagement between the boss and the slot, in this example, the boss is located at the first end 204 of the first body 210 and partially extends into the arc-shaped notch 202. That is, when the first body 210 clamps the moving contact bar 12, the boss is first engaged in the slot. Of course, to enhance the connection between the boss and the first body 210, the boss and the first body 210 can be integrally formed.

[0071] like Figure 6 As shown, in some embodiments, the sidewall of the moving contact rod 12 has two symmetrical slots; the boss on the first body 210 and the boss on the second body 220 are engaged with the two slots.

[0072] Specifically, the sidewall of the moving contact rod 12 can be constructed with two symmetrical slots. Of course, in one example, the sidewall of the moving contact rod 12 has two symmetrical cuts, which are located between the two slots. Specifically, based on the actual shape of the slots of the moving contact rod 12, the shape of the boss at the first body 210 can be reasonably designed. For example, in one example, the first body 210 and the second body 220 are provided with a limiting platform 203 at the arc-shaped notch 202. The limiting platform 203 is connected to the boss and is used to contact the cut.

[0073] It is understood that the first body 210 and the second body 220 have arc-shaped protrusions corresponding to the slots, and a limiting platform 203 that abuts against the notch is formed on one side of the arc-shaped protrusion. The outer end face of the limiting platform 203 is flat. This arrangement can accommodate the locking of the moving contact bar 12 and prevent the opening and holding device from rotating relative to the moving contact bar 12, so that the opening and holding device can stably separate the moving contact and the stationary contact.

[0074] like Figure 1 and Figure 2 As shown, in some embodiments, the guide assembly 13 includes a fixed flange and a guide sleeve, the fixed flange being located outside the guide sleeve, and the fixed flange and the guide sleeve forming a through hole for the moving contact rod 12 to pass through; the second end 205 of the first body 210 and the second body 220 is used to abut against the end face of the fixed flange.

[0075] Specifically, the fixed flange is fixedly connected to the housing 11, meaning the fixed flange is stationary relative to the housing 11. When the moving contact rod 12 is moved away from the stationary contact by an external device, that is, the outer end of the moving contact rod 12 moves relative to the fixed flange, and the distance between the snap-fit ​​portion 121 of the moving contact rod 12 and the outer end face of the fixed flange increases, the movement of the moving contact rod 12 by the external device is stopped when the first body 210 and the second body 220 are accommodated. By fastening the first body 210 and the second body 220 to the moving contact rod 12, that is, by embedding the boss in the slot, and then removing the external device, the second ends 205 of the first body 210 and the second body 220 abut against the end face of the fixed flange, thereby achieving the purpose of keeping the outer end of the moving contact rod 12 in the open position, and thus achieving the separation of the moving contact and the stationary contact.

[0076] like Figure 5 As shown, in some embodiments, the outer end face of the fixed flange is provided with a plurality of connectors 131, which are used to connect the fixed flange and the guide sleeve; the second end 205 of the first body 210 and the second body 220 is provided with an abutment platform 207, which is used to abut against the part of the end face of the fixed flange other than the connectors 131.

[0077] Specifically, since multiple fastening bolts are provided on the outer end face of the fixed flange, in order to avoid these fastening bolts, an abutment platform 207 is provided on the second end 205 of the first body 210 and the second body 220. The abutment platform 207 can contact other surfaces of the fixed flange other than the fastening bolts, so as to increase the stability of the second end 205 when it abuts against the fixed flange.

[0078] The abutment platform 207 can be multiple abutment bosses, as long as they can avoid the fastening bolts. Of course, the abutment platform 207 can also be a semi-circular abutment block formed on the outer periphery of the second end 205 of the first body 210. The semi-circular abutment block can abut against the outer periphery of the fixed flange, thereby further improving the abutment stability between the second end 205 and the fixed flange.

[0079] like Figure 4 and Figure 8 As shown, Figure 8 This is a front view structural diagram of a first body or a second body provided according to some embodiments of this application. In some embodiments, the first end 204 of the first body 210 and the second body 220 is formed with at least two clearance grooves 208 to form mounting holes 206 between the groove wall of the clearance groove 208 and the mating plane, the mounting holes 206 being for fasteners to pass through.

[0080] Specifically, the clearance groove 208 is provided to form a connecting plate between the first body 210 and the second body 220. One side of the connecting plate is the groove wall of the clearance groove 208, and the opposite side is a mating plane. By providing mounting holes 206 on the connecting plate, it is easy for fastening bolts to pass through, so as to realize the fastening connection between the first body 210 and the second body 220.

[0081] A clearance groove 208 can be provided at each of the opposite ends of the mating plane of the first body 210, that is, a connecting plate can be provided at each end, so as to securely connect the first body 210 and the second body 220 to the moving contact rod 12.

[0082] This application also provides an assembly method for a vacuum interrupter 10, applied to the opening and holding device for the vacuum interrupter in the above embodiments, such as... Figure 9 As shown, the assembly method includes:

[0083] Step S101: Fix the stationary contact assembly;

[0084] Step S102: Connect the fastener to the mounting part at the end of the moving contact bar 12, and drive the fastener to move through the drive mechanism;

[0085] Step S103: Control the drive mechanism to move the moving contact bar 12 a preset distance away from the stationary contact;

[0086] Step S104: Install the tripping and holding device on the moving contact bar 12, and make the limiting part 201 of the support body 200 engage with the locking part 121, and the support body 200 abut against the guide assembly 13.

[0087] Step S105: Remove the fasteners to keep the stationary contact and the moving contact separated.

[0088] It is understandable that the stationary contact assembly can be fixed using external clamping devices, or the housing 11 can be clamped and fixed. Then, fasteners (eye bolts) are screwed into the threaded holes at the outer end of the moving contact rod 12, and a crane is used to pull the moving contact rod 12 apart by a certain distance, thus separating the moving arc contact from the stationary arc contact. Next, the tripping retaining device from the above embodiment is placed at the portion of the moving contact rod 12 that extends beyond the housing 11. Specifically, the bosses on the first body 210 and the second body 220 are engaged with the slots on the moving contact rod 12, and the second ends 205 of the first body 210 and the second body 220 are supported by fixed flanges; subsequently, the first body 210 and the second body 220 are fastened together using bolts. Finally, the crane and lifting bolts are removed. At this point, under the action of the tripping retaining device, the outer end of the moving contact rod 12 remains in the tripped position, that is, the moving contact remains separated from the stationary contact, thus facilitating subsequent assembly of the vacuum interrupter 10.

[0089] In this example, the trip holding device can avoid the problem of reduced insulation performance of vacuum interrupter 10 due to friction between moving and stationary contacts during the assembly of other components at the moving end of vacuum interrupter 10 and subsequent assembly of vacuum circuit breaker moving support.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A circuit breaker holding device for a vacuum interrupter, characterized in that, The vacuum interrupter includes a shell, a stationary contact assembly, and a moving contact assembly. A guide assembly is also provided outside the shell. The stationary contact assembly includes a stationary contact. The moving contact assembly includes a moving contact rod and a moving contact. One end of the moving contact rod, which is away from the moving contact, is exposed outside the guide assembly and is provided with a snap-fit ​​part. The tripping and holding device includes: The support body is provided with a limiting part, which is used to engage with the locking part. The end of the support body facing the moving contact is used to abut against the guide component so that the moving contact and the stationary contact remain separated.

2. The opening and holding device for a vacuum interrupter according to claim 1, characterized in that, The support body includes a first body and a second body with identical structures, and the first body and the second body are provided with the limiting part; The tripping retaining device further includes a fastener, which is used to connect the first body and the second body when the first body and the second body clamp the moving contact bar, so as to keep the moving contact and the stationary contact separated.

3. The opening and holding device for a vacuum interrupter according to claim 2, characterized in that, The snap-fit ​​portion is a snap-fit ​​groove formed on the side wall of the moving contact rod; The limiting part is a boss formed on the first body and the second body; The boss is adapted to engage with the slot.

4. The opening and holding device for a vacuum interrupter according to claim 3, characterized in that, Both the first body and the second body include a first end and a second end that are opposite each other, and a mating plane that connects the first end and the second end. The mating planes of the first body and the second body are arranged opposite each other. The mating plane has an arc-shaped notch, and the boss is located at the first end of the first body and the second body, and extends into the arc-shaped notch.

5. The opening and holding device for a vacuum interrupter according to claim 4, characterized in that, The sidewall of the moving contact bar has two symmetrical slots; The protrusions on the first body and the second body engage with the two corresponding slots.

6. The opening and holding device for a vacuum interrupter according to claim 5, characterized in that, The sidewall of the moving contact bar has two symmetrical cuts, which are located between the two slots; The first body and the second body are provided with a limiting platform at the arc-shaped notch. The limiting platform is connected to the boss and is used to contact the notch.

7. The opening and holding device for a vacuum interrupter according to any one of claims 4-6, characterized in that, The guide assembly includes a fixed flange and a guide sleeve, the fixed flange being located outside the guide sleeve, and the fixed flange and the guide sleeve forming a through hole for the moving contact bar to pass through; The second ends of the first body and the second body are used to abut against the end face of the fixed flange.

8. The opening and holding device for a vacuum interrupter according to claim 7, characterized in that, The outer end face of the fixed flange is provided with a plurality of connectors, which are used to connect the fixed flange and the guide sleeve. The second end of the first body and the second body is provided with an abutment platform, which is used to abut against the end face of the fixed flange other than the connecting member.

9. The opening and holding device for a vacuum interrupter according to any one of claims 4-6, characterized in that, The first body and the second body have at least two clearance grooves formed at their first ends to form mounting holes between the groove walls of the clearance grooves and the mating plane, the mounting holes being for the fasteners to pass through.

10. A method for assembling a vacuum interrupter, characterized in that, The assembly method of the opening and holding device for a vacuum interrupter as described in any one of claims 1-9 includes: Fixed stationary contact assembly; The eye bolt is connected to the mounting part at the end of the moving contact bar, and the eye bolt is driven to move by a drive mechanism; The drive mechanism is controlled to move the moving contact bar a preset distance away from the stationary contact. The circuit breaker holding device is installed on the moving contact bar, and the limiting part of the support body is engaged with the locking part, and the support body abuts against the guide assembly. Remove the eye bolt to keep the stationary and moving contacts separated.

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