Opening holding device for vacuum arc-extinguishing chamber and assembly method of vacuum arc-extinguishing chamber

Abstract

The invention relates to an opening holding device for a vacuum arc-extinguishing chamber and an assembling method of the vacuum arc-extinguishing chamber. The opening keeping device comprises a supporting body and is provided with a limiting part, the limiting part is used for being clamped with the clamping part, and the end, facing the moving contact, of the supporting body is used for abutting against the guide assembly so that the moving contact can be kept separated from the static contact. According to the opening holding device, the moving contact and the static contact can be kept in a separated state, so that friction between the moving contact and the static contact is avoided when other parts of the vacuum arc-extinguishing chamber are assembled, and the insulating property of the vacuum arc-extinguishing chamber can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum interrupter chambers, and in particular to a switch holding device for a vacuum interrupter chamber and an assembly method for the vacuum interrupter chamber. Background Art

[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 be aged with power frequency voltage, impulse voltage, and even high current to improve its insulation performance before the vacuum circuit breaker can be assembled.

[0003] Since the vacuum degree inside the vacuum interrupter reaches 10 -3 ~10 -4 Pa, under the action of external atmospheric pressure, will generate a force that makes the moving contact close with the static contact by itself, that is, the self-closing force, so that the moving and static contacts of the arc extinguishing chamber are in a closed state. In addition, because the moving contact rod of the vacuum arc extinguishing chamber is brazed with the bellows, in which the bellows is an elastic element, the moving contact rod is in a non-fixed state. Therefore, during the assembly of other parts at the moving end of the vacuum arc extinguishing chamber and the subsequent assembly of the moving support of the vacuum circuit breaker, friction between the moving and static contacts of the arc extinguishing chamber will be caused, causing scratches on the contact surface, and even generating tiny metal particles, reducing the insulation performance of the vacuum arc extinguishing chamber, thereby affecting the performance of the vacuum circuit breaker. Summary of the invention

[0004] Based on this, it is necessary to provide a switch holding device for a vacuum arc chamber and an assembly method for a vacuum arc chamber to address the problem that during the assembly of other components at the moving end of the vacuum arc chamber and the subsequent assembly of the moving support of the vacuum circuit breaker in the related technology, friction between the moving and static contacts of the arc chamber may be caused, resulting in scratches on the contact surface and even the generation of tiny metal particles.

[0005] The embodiment of the present application first provides a switch-off holding device for a vacuum interrupter, wherein the vacuum interrupter comprises a housing, a static contact assembly and a moving contact assembly, a guide assembly is further arranged outside the housing, the static contact assembly comprises a static contact, the moving contact assembly comprises a moving contact rod and a moving contact, an end of the moving contact rod facing away from the moving contact is exposed to the guide assembly, and a clamping portion is arranged;

[0006] The gate opening holding device comprises:

[0007] The support body is provided with a limiting portion, the limiting portion is used to be clamped with the clamping portion, and the end of the support body facing the moving contact is used to abut against the guide assembly to keep the moving contact separated from the static contact.

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

[0009] The switch-off holding device further comprises a fastener, and the fastener is used to connect the first body and the second body when the first body and the second body clamp the moving contact rod, so as to keep the moving contact and the static contact separated.

[0010] In one embodiment, the clamping portion is a clamping groove formed on the side wall of the moving contact rod;

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

[0012] The boss is adapted to be engaged 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 docking plane connecting the first end and the second end, and the docking plane of the first body and the docking plane of the second body are arranged opposite to each other;

[0014] The docking plane is configured with an arc-shaped notch, and the boss is located at the first ends of the first body and the second body and extends into the arc-shaped notch.

[0015] In one embodiment, the side wall of the moving contact rod has two symmetrical slots;

[0016] The boss of the first body and the boss on the second body are correspondingly engaged with the two slots.

[0017] In one embodiment, the side wall of the moving contact rod has two symmetrical cutouts, and the cutouts are 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 the limiting platform is used to contact the incision.

[0019] In one embodiment, the guide assembly includes a fixed flange and a guide sleeve, the fixed flange is located outside the guide sleeve, and the fixed flange and the guide sleeve are formed with a through hole for the moving contact rod to pass through;

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

[0021] In one embodiment, the outer end surface of the fixing flange is provided with a plurality of connecting pieces, and the plurality of connecting pieces are used to connect the fixing flange and the guide sleeve;

[0022] Abutment platforms are protruding from the second ends of the first body and the second body, and the abutment platforms are used to abut against a portion of the end surface of the fixing flange except the connecting piece.

[0023] In one embodiment, at least two avoidance grooves are formed at the first ends of the first body and the second body to form a mounting hole between the groove wall of the avoidance groove and the docking plane, and the mounting hole is used for the fastener to pass through.

[0024] The present application also provides an assembly method for a vacuum interrupter, using the switch holding device for a vacuum interrupter described in the above embodiment, and the assembly method includes:

[0025] Fixed static contact assembly;

[0026] Connecting the fastener to the mounting portion of the end of the moving contact rod, and driving the fastener to move by a driving mechanism;

[0027] Control the driving mechanism to drive the moving contact rod to move a preset distance in a direction away from the static contact;

[0028] The switch-off holding device is installed on the moving contact rod, and the limiting part of the support body is engaged with the engaging part, and the support body is abutted against the guide assembly;

[0029] The fasteners are removed to keep the stationary and moving contacts separated.

[0030] The above-mentioned opening switch holding device for vacuum interrupter and the assembly method of vacuum interrupter are provided with a limiting portion on the support body. When the moving contact rod contacts the external device and is away from the static contact assembly, the limiting portion cooperates with the clamping portion on the moving contact rod to achieve relative fixation of the support body on the moving contact rod, and the support body is provided with one end of the moving contact abutting against the guide assembly, so that the outer end of the moving contact rod can be maintained in the opening position by the support body, so that the moving contact and the static contact are kept separated, so as to facilitate the assembly of other components at the moving end of the vacuum interrupter. The opening switch holding device can keep the moving contact and the static contact in a separated state, thereby ensuring that there is no friction between the moving contact and the static contact when assembling other components of the vacuum interrupter, which is beneficial to improving the insulation performance of the vacuum interrupter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a vacuum arc extinguishing chamber provided according to some embodiments of the present application.

[0032] Figure 2 This is a schematic diagram of the structure in which a switch-off holding device is arranged in a vacuum arc extinguishing chamber according to some embodiments of the present application.

[0033] Figure 3 This is a schematic diagram of the structure of a gate opening holding device provided according to some embodiments of the present application.

[0034] Figure 4 This is one of the structural schematic diagrams of the gate opening holding device from another perspective provided according to some embodiments of the present application.

[0035] Figure 5 This is a schematic structural diagram of a gate opening holding device from another perspective provided according to some embodiments of the present application.

[0036] Figure 6 This is a schematic diagram of the top view of the structure of the gate opening holding device provided according to some embodiments of the present application.

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

[0038] Figure 8 This is a schematic diagram of the front view structure of the first body or the second body provided according to some embodiments of the present application.

[0039] Fig. 9 A schematic flow chart of a method for assembling a vacuum interrupter chamber according to some embodiments of the present application.

[0040] Figure Number:

[0041] 10. vacuum interrupter; 11. housing; 12. moving contact rod; 121. clamping part; 13. guide assembly; 131. connecting piece;

[0042] 200, supporting body; 201, limiting portion; 210, first body; 220, second body; 202, arc-shaped notch; 203, limiting platform; 204, first end; 205, second end; 206, mounting hole; 207, abutting platform; 208, avoidance groove. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0049] Since the vacuum degree inside the vacuum interrupter reaches 10 -3 ~10 -4 Pa, under the action of external atmospheric pressure, will generate a force that makes the moving contact close with the static contact by itself, that is, the self-closing force, so that the moving and static contacts of the arc extinguishing chamber are in a closed state. In addition, because the moving contact rod of the vacuum arc extinguishing chamber is brazed with the bellows, in which the bellows is an elastic element, the moving contact rod is in a non-fixed state. Therefore, during the assembly of other parts at the moving end of the vacuum arc extinguishing chamber and the subsequent assembly of the moving support of the vacuum circuit breaker, friction between the moving and static contacts of the arc extinguishing chamber will be caused, causing scratches on the contact surface, and even generating tiny metal particles, reducing the insulation performance of the vacuum arc extinguishing chamber, thereby affecting the performance of the vacuum circuit breaker.

[0050] See also Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of a vacuum arc extinguishing chamber provided according to some embodiments of the present application. Figure 2 This is a schematic diagram of the structure in which a switch-off holding device is arranged in a vacuum arc extinguishing chamber according to some embodiments of the present application. Figure 3 The schematic diagram of the structure of the opening and holding device provided according to some embodiments of the present application. The present application first provides an opening and holding device for a vacuum interrupter, wherein the vacuum interrupter 10 comprises a housing 11, a static contact assembly and a moving contact assembly, and a guide assembly 13 is further provided outside the housing 11, wherein the static contact assembly comprises a static contact, and the moving contact assembly comprises a moving contact rod 12 and a moving contact, wherein one end of the moving contact rod 12 away from the moving contact is exposed to the guide assembly 13, and a clamping portion 121 is provided. The opening and holding device may comprise a supporting body 200.

[0051] The support body 200 is provided with a limiting portion 201, which is used to be clamped with the clamping portion 121. The end of the support body 200 facing the moving contact is used to abut against the guide assembly 13 to keep the moving contact and the static contact separated.

[0052] It can be understood that the opening holding device, as a tool used in the assembly process of the vacuum interrupter 10, can keep the moving contact and the static contact in the open state, thereby facilitating the assembly of other components at the moving end of the vacuum interrupter 10 (the end where the moving contact assembly is located), as well as subsequent vacuum circuit breaker moving production devices.

[0053] In order to clearly describe the setting position of the opening holding device, the structure of the vacuum interrupter 10 is first introduced, including a housing 11, a static contact assembly and a moving contact assembly. The static contact assembly and the moving contact assembly are arranged relatively to each other. The static contact assembly includes a static contact rod and a static contact. The moving contact assembly includes a moving contact rod 12 and a moving contact. Under the action of the self-closing force, the static contact and the moving contact are in contact, that is, in a closed state. However, the moving contact rod can move relative to the housing 11, and a guide assembly 13 for limiting the moving direction of the contact rod is also provided outside the housing 11. The guide assembly 13 may include a guide sleeve and a fixing flange for fixing the guide sleeve. Of course, in order to facilitate the movement of the moving contact rod 12, an opening adapted to the moving contact rod 12 is constructed in the guide assembly 13. The specific structure of the vacuum interrupter 10 can be understood with reference to the relevant technology, and will not be repeated here.

[0054] In the initial state where the moving contact is in contact with the stationary contact, the outer end of the moving contact rod 12 can protrude by a distance of one end of the guide assembly 13, or be flush with the guide assembly 13. The exposed end of the moving contact rod 12 can facilitate the connection of an external device with the end of the moving contact rod 12, thereby driving the moving contact rod 12 to move away from the stationary contact, thereby providing an installation space for installing the opening holding device on the outer end of the moving contact rod 12, that is, the outer end of the moving contact rod 12 is in the opening position.

[0055] Specifically, a clamping portion 121 is provided at the outer end of the moving contact rod 12, or at the side wall near the outer end. When the outer end of the moving contact rod 12 is in the opening position, the clamping portion 121 is used to clamp with the limiting portion 201 of the support body 200, and combined with the guide assembly 13, abuts against the end of the support body 200 toward the moving contact, so that the support body 200 is clamped between the guide assembly 13 and the clamping portion 121 of the moving contact rod 12, so that the outer end of the moving contact rod 12 is maintained in the opening position, that is, the moving contact is kept separated from the static contact.

[0056] Among them, the clamping portion 121 can be an annular protrusion arranged on the outside of the moving contact rod 12, and the supporting body 200 can be an arc block with a certain height along the axial direction of the moving contact rod 12, and the arc block can be adapted to cover part of the moving contact rod 12, and the upper end of the arc block abuts against the annular protrusion, and the lower end of the arc block abuts against the guide assembly 13, so as to keep the outer end of the moving contact rod 12 in the opening position through the arc block.

[0057] In addition, in order to increase the stability of the support body 200 set at the end of the moving contact rod 12, a plurality of limiting holes can be opened on the above-mentioned annular boss, and the limiting portion 201 of the support body 200 is designed to be a positioning column adapted to the limiting hole. When the moving contact rod 12 is moved away from the static contact through an external device, that is, when a space capable of installing the support body 200 is formed between the clamping portion 121 and the guide assembly 13, the positioning column is embedded in the limiting hole of the annular boss, thereby achieving the support body 200 being stably set between the clamping portion 121 of the moving contact rod 12 and the guide assembly 13.

[0058] In addition to the above method, the clamping portion 121 may be a clamping groove formed on the outside of the moving contact rod 12, and the support body 200 may have a boss that can be embedded in the clamping groove. The support body 200 may be an arc block with a certain height along the axial direction of the moving contact rod 12, and the boss is arranged at the top end of the arc block, and the bottom end of the arc block abuts against the guide assembly 13, so that the outer end of the moving contact rod 12 is maintained in the opening position.

[0059] Of course, in order to further enhance the stability of the support body 200 between the clamping portion 121 of the moving contact rod 12 and the guide assembly 13, two support bodies 200 with the same structure can be set to clamp the moving contact rod 12, that is, the two support bodies 200 are symmetrically arranged about the moving contact rod 12. The specific structure can be understood by referring to the following example.

[0060] In the present application, by setting a limiting portion 201 on the support body 200, when the moving contact rod 12 contacts the external device and is away from the static contact, the limiting portion 201 cooperates with the clamping portion 121 on the moving contact rod 12 to achieve relative fixation of the support body 200 on the moving contact rod 12, and by setting the support body 200 to abut against the guide assembly 13 at one end toward the moving contact, the outer end of the moving contact rod 12 can be maintained in the opening position by the support body 200, so that the moving contact and the static contact are kept separated, so as to facilitate the assembly of other components at the moving end of the vacuum interrupter 10. The opening holding device can keep the moving contact and the static contact in a separated state, thereby ensuring that there is no friction between the moving contact and the static contact when assembling other components of the vacuum interrupter 10, which is beneficial to improving the insulation performance of the vacuum interrupter 10.

[0061] Next, we will combine the attached Figure 1 -Attached Figure 8 The specific structure of the switch opening holding device provided in the embodiment of the present application is introduced.

[0062] Combination Figure 4 and Figure 5 As shown, Figure 4 This is one of the structural schematic diagrams of the gate opening holding device from another perspective provided according to some embodiments of the present application. Figure 5The schematic diagram of the structure of the opening gate holding device under another perspective provided according to some embodiments of the present application. In some embodiments, the support body 200 includes a first body 210 and a second body 220 of the same structure, and the first body 210 and the second body 220 are provided with a limit portion 201; the opening gate 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 rod 12, so as to keep the moving contact and the static contact separated.

[0063] Specifically, the first body 210 and the second body 220 with the same structure can clamp the moving contact rod 12. After the limiting portion 201 on the first body 210 and the second body 220 are clamped with the clamping portion 121 on the moving contact rod 12, and after the ends of the first body 210 and the second body 220 are abutted against the guide assembly 13, the first body 210 and the second body 220 are fastened together by fasteners, which not only enables the first body 210 and the second body 220 to be firmly fixed on 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 may be fastening bolts, buckles, etc., and are not limited here.

[0065] like Figure 1 and Figure 4 As shown, in some embodiments, the engaging portion 121 is a slot 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 is adapted to engage with the slot.

[0066] Specifically, the clamping portion 121 may be an annular clamping groove formed on the side wall of the moving contact rod 12, and the annular clamping groove may be arranged near the outer end of the moving contact rod 12. In order to be adapted and clamped with the clamping groove, the limiting portion 201 may be a boss formed on the first body 210 and the second body 220. The arrangement of the clamping groove and the boss can relatively fix the first body 210 and the second body 220 on the outer side of the moving contact rod 12, and the abutment of the first body 210 with the second body 220 and the guide assembly 13 can achieve the purpose of limiting the outer end of the moving contact rod 12 to the opening position. This arrangement is not only convenient for the subsequent disassembly of the opening holding device, but also convenient for fastening the two bodies together through fasteners, and is conducive to improving the assembly and disassembly efficiency while clamping the moving contact rod 12.

[0067] Combination Figure 6 and Figure 7 As shown, Figure 6 This is a schematic diagram of the top view of the structure of the gate opening holding device provided according to some embodiments of the present application. Figure 7 for Figure 6In some embodiments, the first body 210 and the second body 220 each include a first end 204 and a second end 205 opposite to each other, and a docking plane connecting the first end 204 and the second end 205, the docking plane of the first body 210 and the docking plane of the second body 220 are arranged opposite to each other; the docking plane is configured 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, in order to facilitate the description of the structures of the first body 210 and the second body 220, and the structures of the first body 210 and the second body 220 are the same, the structure of the first body 210 is taken as an example for description. Along the axial direction of the moving contact rod 12, the first body 210 includes a first end 204 and a second end 205 opposite to each other, and the docking plane is the side opposite to the second body 220, which can also be understood as the side facing the moving contact rod 12. The distance between the first end 204 and the second end 205 can be understood as the distance that the moving contact rod 12 is driven away from the static contact by the external device, and the distance does not need to be too large, and only needs to ensure the separation between the moving contact and the static contact.

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

[0070] In order to achieve effective engagement between the boss and the slot, the boss in this example is disposed 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 rod 12, the boss is first engaged in the slot. Of course, in order to enhance the connection firmness between the boss and the first body 210, the boss and the first body 210 can be formed integrally.

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

[0072] Specifically, the side wall of the moving contact rod 12 can be configured with two symmetrical slots. Of course, in one example, the side wall of the moving contact rod 12 has two symmetrical cutouts, and the cutout is located between the two slots. Specifically, according to the actual shape of the slot 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, and the limiting platform 203 is connected to the boss, and the limiting platform 203 is used to contact the cutout.

[0073] It can be understood that arc-shaped bosses corresponding to the slots are formed on the first body 210 and the second body 220, and a stopper 203 abutting against the cutout is formed on one side of the arc-shaped boss, and the outer end surface of the stopper 203 is a plane. This arrangement can adapt to the moving contact rod 12, and can prevent the opening holding device from rotating relative to the moving contact rod 12, so that the opening holding device can stably separate the moving contact and the static 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 is located outside the guide sleeve, and the fixed flange and the guide sleeve are formed with 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, that is, the fixed flange is stationary relative to the housing 11. When the moving contact rod 12 is driven away from the static contact by the external device, that is, the outer end of the moving contact rod 12 moves relative to the fixed flange, and the distance between the clamping portion 121 of the moving contact rod 12 and the outer end surface of the fixed flange increases. When the distance can accommodate the first body 210 and the second body 220, the external device stops driving the moving contact rod 12 to move. By snapping the first body 210 and the second body 220 on the moving contact rod 12, that is, embedding the boss in the clamping groove, and then removing the external device, so that the second end 205 of the first body 210 and the second body 220 abuts against the end surface of the fixed flange, the purpose of keeping the outer end of the moving contact rod 12 in the opening position is achieved, and then the moving contact and the static contact are separated.

[0076] like Figure 5 As shown, in some embodiments, a plurality of connecting members 131 are provided on the outer end surface of the fixing flange, and the plurality of connecting members are used to connect the fixing flange and the guide sleeve; abutment platforms 207 are protrudingly provided on the second ends 205 of the first body 210 and the second body 220, and the abutment platforms 207 are used to abut against part of the end surface of the fixing flange except the connecting members 131.

[0077] Specifically, since a plurality of fastening bolts are provided on the outer end surface of the fixing flange, in order to avoid the fastening bolts, an abutment platform 207 is protrudingly provided on the second end 205 of the first body 210 and the second body 220. The abutment platform 207 can contact with other surfaces of the fixing flange outside the fastening bolts to increase the stability when the second end 205 abuts against the fixing flange.

[0078] The abutment platform 207 may be a plurality of abutment bosses that can avoid the fastening bolts. Of course, the abutment platform 207 may also be a semicircular abutment block formed on the outer periphery of the second end 205 of the first body 210, and the semicircular abutment block can abut against the outer periphery of the fixing flange, thereby further improving the abutment stability between the second end 205 and the fixing flange.

[0079] like Figure 4 and Figure 8 As shown, Figure 8 The front view of the first body or the second body provided according to some embodiments of the present application is a schematic diagram. In some embodiments, the first end 204 of the first body 210 and the second body 220 is formed with at least two avoidance grooves 208 to form a mounting hole 206 between the groove wall of the avoidance groove 208 and the docking plane, and the mounting hole 206 is used for fasteners to pass through.

[0080] Specifically, the avoidance groove 208 is provided to form a connecting plate on the first body 210 and the second body 220, one side of the connecting plate is the groove wall of the avoidance groove 208, and the other opposite side is a docking plane. By providing a mounting hole 206 on the connecting plate, it is convenient for fastening bolts to pass through, thereby realizing a fastening connection between the first body 210 and the second body 220.

[0081] An avoidance groove 208 may be provided at opposite ends of the docking plane of the first body 210 , that is, a connecting plate may be provided at each end, so as to firmly connect the first body 210 and the second body 220 to the moving contact rod 12 .

[0082] The present application also provides an assembly method of a vacuum interrupter 10, which is applied to the opening and holding device for the vacuum interrupter in the above embodiment. Fig. 9 As shown, the assembly method includes:

[0083] Step S101, fixing the stationary contact assembly;

[0084] Step S102, connecting the fastener to the mounting portion at the end of the moving contact rod 12, and driving the fastener to move by a driving mechanism;

[0085] Step S103, controlling the driving mechanism to drive the moving contact rod 12 to move a preset distance in a direction away from the static contact;

[0086] Step S104, installing the opening holding device on the moving contact rod 12, and making the limiting portion 201 of the support body 200 engage with the engaging portion 121, and the support body 200 abuts against the guide assembly 13;

[0087] Step S105, removing the fasteners to keep the stationary contact and the moving contact separated.

[0088] It can be understood that the static contact assembly can be fixed by an external clamping device, etc., and it can also be understood that the housing 11 is clamped and fixed. Then, the fastener (eye screw) is screwed into the threaded hole at the outer end of the moving contact rod 12, and the moving contact rod 12 is pulled apart by a crane by a certain distance, that is, the moving arc contact is separated from the static arc contact. Next, the opening holding device in the above embodiment is placed at the part of the moving contact rod 12 extending outside the housing 11. Specifically, the bosses on the first body 210 and the second body 220 are matched with the card 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 the fixing flange; then, the first body 210 and the second body 220 are fastened and connected by the fastening bolts. Finally, the crane and the lifting bolts are removed. At this time, under the action of the opening holding device, the outer end of the moving contact rod 12 is kept in the opening position, that is, the moving contact and the static contact are kept separated, so as to facilitate the subsequent assembly of the vacuum interrupter 10.

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

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A switch holding device for a vacuum interrupter, characterized in that: The vacuum interrupter comprises a housing, a static contact assembly and a moving contact assembly, a guide assembly is further arranged outside the housing, the static contact assembly comprises a static contact, the moving contact assembly comprises a moving contact rod and a moving contact, one end of the moving contact rod away from the moving contact is exposed to the guide assembly, and a clamping portion is arranged; The gate opening holding device comprises: The support body is provided with a limiting portion, the limiting portion is used to be clamped with the clamping portion, and the end of the support body facing the moving contact is used to abut against the guide assembly to keep the moving contact separated from the static contact.

2. The opening and holding device for vacuum interrupter according to claim 1, characterized in that: The supporting body comprises a first body and a second body having the same structure, and the first body and the second body are provided with the limiting part; The switch-off holding device further comprises a fastener, and the fastener is used to connect the first body and the second body when the first body and the second body clamp the moving contact rod, so as to keep the moving contact and the static contact separated.

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

4. The opening and holding device for vacuum interrupter according to claim 3, characterized in that: The first body and the second body each include a first end and a second end opposite to each other, and a docking plane connecting the first end and the second end, and the docking plane of the first body and the docking plane of the second body are arranged opposite to each other; The docking plane is configured with an arc-shaped notch, and the boss is located at the first ends of the first body and the second body and extends into the arc-shaped notch.

5. The opening and holding device for vacuum interrupter according to claim 4, characterized in that: The side wall of the moving contact rod has two symmetrical slots; The boss of the first body and the boss on the second body are correspondingly engaged with the two slots.

6. The opening and holding device for vacuum interrupter according to claim 5, characterized in that: The side wall of the moving contact rod has two symmetrical cutouts, and the cutouts 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 the limiting platform is used to contact the incision.

7. The opening and holding device for a vacuum interrupter according to any one of claims 4 to 6, characterized in that: The guide assembly comprises a fixed flange and a guide sleeve, wherein the fixed flange is located outside the guide sleeve, and the fixed flange and the guide sleeve are formed with through holes for the moving contact rod to pass through; The second ends of the first body and the second body are used to abut against the end surface of the fixing flange.

8. The opening and holding device for vacuum interrupter according to claim 7, characterized in that: The outer end surface of the fixing flange is provided with a plurality of connecting pieces, and the plurality of connecting pieces are used to connect the fixing flange and the guide sleeve; Abutment platforms are protruding from the second ends of the first body and the second body, and the abutment platforms are used to abut against a portion of the end surface of the fixing flange except the connecting piece.

9. The opening and holding device for a vacuum interrupter according to any one of claims 4 to 6, characterized in that: At least two avoidance grooves are formed at the first ends of the first body and the second body to form a mounting hole between the groove wall of the avoidance groove and the docking plane, and the mounting hole is used for the fastener to pass through.

10. A method for assembling a vacuum interrupter, characterized in that: The opening and holding device for a vacuum interrupter chamber as claimed in any one of claims 1 to 9, wherein the assembly method comprises: Fixed static contact assembly; Connecting the fastener to the mounting portion of the end of the moving contact rod, and driving the fastener to move by a driving mechanism; Control the driving mechanism to drive the moving contact rod to move a preset distance in a direction away from the static contact; The switch-off holding device is installed on the moving contact rod, and the limiting part of the support body is engaged with the engaging part, and the support body is abutted against the guide assembly; The fasteners are removed to keep the stationary and moving contacts separated.

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