Vacuum interrupter and high voltage power device

Abstract

The application relates to a vacuum arc-extinguishing chamber and high-voltage power equipment, which can solve the problem of low installation precision of a telescopic guide structure during installation in a vacuum arc-extinguishing chamber. The static conductive rod of the vacuum arc-extinguishing chamber is arranged in a static end cover plate, the dynamic conductive rod is arranged in a dynamic end cover plate, the corrugated pipe assembly comprises a guide mechanism and a corrugated pipe body, the dynamic end cover plate is provided with a first positioning part, one end of the guide mechanism is provided with a first mounting part, the other end of the guide mechanism is provided with a second mounting part, the rod body of the dynamic conductive rod is provided with a second positioning part, the second positioning part comprises an axial positioning part and a circumferential positioning part which are connected with each other, the axial positioning part and the circumferential positioning part are configured as follows: the second mounting part can be assembled in the axial positioning part along the axial direction of the dynamic conductive rod and can rotate around the axial direction of the dynamic conductive rod to abut against and be limited by the circumferential positioning part, and when the second mounting part abuts against and is limited by the circumferential positioning part, the first mounting part and the first positioning part are matched with each other in position.

Description

Technical Field

[0001] This application relates to the field of high-voltage electrical technology, and in particular to a vacuum interrupter and high-voltage power equipment. Background Technology

[0002] With the development of medium and high voltage power system technology, vacuum interrupter technology has emerged. This technology uses a vacuum environment as the arc extinguishing and insulation medium, and has the characteristics of strong breaking capacity, excellent insulation performance, long mechanical life and no environmental pollution. It has become the core arc extinguishing unit of medium and high voltage power switchgear and is widely used in power grid transmission and distribution, industrial power supply and other fields. As a result, metal bellows adapted to the operation of vacuum interrupters have been developed. As a key component of vacuum interrupters, metal bellows not only undertakes the static sealing function of maintaining the high vacuum environment in the cavity, but also needs to transmit the movement of the external operating mechanism to drive the moving contact to complete the opening and closing action.

[0003] In related technologies, to adapt to the increased contact gap of the arc-extinguishing chamber caused by the improvement of power grid voltage level, technicians designed the bellows as a long-stroke structure to meet the greater axial expansion and contraction requirements. At the same time, to solve the problem of low stiffness and easy deformation of long-stroke bellows, a telescopic guide structure embedded in the bellows was configured. The telescopic guide structure provides radial support to the bellows by expanding and contracting axially with the bellows, thus preventing the problem of low stiffness and easy deformation of the bellows.

[0004] However, the retractable guide structure in the relevant technology has the problem of low installation accuracy when installed in a vacuum interrupter chamber. Therefore, it is easy to have potential safety risks due to improper installation, as well as poor product consistency and quality control. Summary of the Invention

[0005] Therefore, it is necessary to address the issue of low installation accuracy of retractable guide structures in vacuum interrupters, which can lead to potential safety risks due to improper installation, as well as poor product consistency and quality control. A vacuum interrupter and high-voltage power equipment should be provided.

[0006] On one hand, this application provides a vacuum interrupter, the vacuum interrupter comprising:

[0007] A housing assembly, comprising an insulating shell, a moving end cover plate, and a stationary end cover plate, wherein the insulating shell has openings at both ends, and the moving end cover plate and the stationary end cover plate respectively cover the openings at both ends of the insulating shell;

[0008] A stationary conductive rod, wherein the stationary conductive rod passes through the stationary end cover plate;

[0009] A movable conductive rod, wherein the movable conductive rod passes through the movable end cover plate;

[0010] A bellows assembly, the bellows assembly being housed within the insulating shell, wherein the bellows assembly includes a guide mechanism and a bellows body sleeved on the guide mechanism, the guide mechanism being sleeved on the movable conductive rod;

[0011] The moving end cover plate is provided with a first positioning part, the guide mechanism is provided with a first mounting part at one end near the first positioning part, the guide mechanism is provided with a second mounting part at the other end, and the moving conductive rod is provided with a second positioning part on its body. The second positioning part includes an axial positioning part and a circumferential positioning part connected to each other, and the axial positioning part and the circumferential positioning part are configured as follows:

[0012] The second mounting part can be assembled onto the axial positioning part along the axial direction of the movable conductive rod, and can rotate around the axial direction of the movable conductive rod until it abuts against the circumferential positioning part. When the second mounting part and the circumferential positioning part abut against each other, the first mounting part and the first positioning part are aligned and matched.

[0013] The vacuum interrupter described in this application, through the dual positioning linkage of the axial and circumferential positioning parts, achieves precise assembly of the guide mechanism and the moving conductive rod, and also realizes self-calibration of the installation alignment between the guide mechanism and the moving end cover. This completely eliminates the traditional assembly method of manual visual alignment and repeated adjustments, significantly improving the installation accuracy of the guide mechanism within the vacuum interrupter. It effectively avoids problems such as bellows support failure and moving conductive rod movement jamming caused by installation deviations, reducing potential safety risks caused by improper installation. At the same time, the standardized positioning and assembly method also improves the consistency and quality control of product production, making it suitable for large-scale mass production.

[0014] In one embodiment, the first mounting part includes a first positioning hole, and the moving end cover is provided with a second positioning hole. The first positioning hole and the second positioning hole are configured such that when the second mounting part and the circumferential positioning part abut against each other and are mutually limited, the first positioning hole and the second positioning hole are mutually aligned and matched.

[0015] In one embodiment, the guiding mechanism includes a guide sleeve and a guide shaft. The guide sleeve and the guide shaft are coaxially arranged and can slide relative to each other along the axial direction. The coaxial axis is configured as a first axis. Both the guide sleeve and the guide shaft are provided with hollow portions. The movable conductive rod passes through the hollow portions. The first mounting portion is provided at the end of the guide sleeve away from the second positioning portion in the first axial direction. The second mounting portion is provided at the end of the guide shaft away from the movable end cover plate in the first axial direction.

[0016] In one embodiment, the guide shaft has an inner wall, the second mounting part is disposed on the inner wall, the second mounting part is configured as a protrusion, the second positioning part is configured as an annular flange integrally formed along the circumference of the moving conductive rod, the axial positioning part is configured as an axial groove provided on the annular flange, the circumferential positioning part is configured as a circumferential groove provided on the annular flange, and the protrusion can be engaged with the axial groove and the circumferential groove.

[0017] In one embodiment, the guide sleeve further includes a guide sleeve body integrally disposed with the first mounting portion. The guide sleeve body is provided with at least two keyways spaced around the first axis. The guide shaft further includes a guide shaft body integrally disposed with the second mounting portion. The guide shaft body is provided with at least two guide keys spaced around the first axis. The guide keys are provided in one-to-one correspondence with the keyways, and the guide keys are slidable relative to the keyways along the direction of the first axis.

[0018] In one embodiment, the keyway and the guide key are fan-shaped in a direction perpendicular to the first axis.

[0019] In one embodiment, the inner diameter of the guide sleeve is the same as the inner diameter of the guide shaft; and / or, the outer diameter of the guide sleeve is the same as the outer diameter of the guide shaft.

[0020] In one embodiment, the outer peripheral wall of the guide shaft and the guide sleeve abuts against the inner peripheral wall of the bellows body.

[0021] In one embodiment, the vacuum interrupter further includes a shield, and the end contact of the moving conductive rod extends into the shield to correspond to the contact of the stationary conductive rod.

[0022] On the other hand, this application provides a high-voltage power equipment, including the aforementioned vacuum interrupter, and the high-voltage power equipment further includes an operating mechanism connected to the movable conductive rod, the operating mechanism being used to drive the movable conductive rod to move axially along the insulating shell. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a vacuum interrupter in one embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the assembly structure of the guide mechanism and the moving conductive rod of the vacuum interrupter in one embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the moving conductive rod of the vacuum interrupter in one embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the structure of the guide shaft of the vacuum interrupter in one embodiment of this application.

[0027] Explanation of icon numbers

[0028] 10. Vacuum interrupter; 100. Housing assembly; 110. Insulating shell; 120. Moving end cover plate; 121. First positioning part; 121a. Second positioning hole; 130. Stationary end cover plate; 200. Stationary conductive rod; 300. Moving conductive rod; 310. Second positioning part; 311. Axial positioning part; 312. Circumferential positioning part; 400. Bellows assembly; 410. Guide mechanism; 411. Guide sleeve; 4111. First mounting part; 4111a. First positioning hole; 4112. Guide sleeve body; 4112a. Keyway; 412. Guide shaft; 4121. Second mounting part; 4122. Guide shaft body; 4122a. Guide key; 412a. Inner wall; 420. Bellows body; 500. First axis; 600. Hollow part; 700. Shielding cover. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please see Figure 1 This application provides a vacuum interrupter 10, which may include a housing assembly 100, a stationary conductive rod 200, a moving conductive rod 300, and a bellows assembly 400. The housing assembly 100 may include an insulating shell 110, a moving end cover plate 120, and a stationary end cover plate 130. The insulating shell 110 has openings at both ends, and the moving end cover plate 120 and the stationary end cover plate 130 respectively cover the openings at both ends of the insulating shell 110.

[0036] A stationary conductive rod 200 passes through a stationary end cover plate 130, and a movable conductive rod 300 passes through a movable end cover plate 120. A bellows assembly 400 is housed within an insulating shell 110. The bellows assembly 400 may include a guide mechanism 410 and a bellows body 420 sleeved on the guide mechanism 410. The guide mechanism 410 is sleeved on the movable conductive rod 300.

[0037] The moving end cover 120 is provided with a first positioning part 121, which can be combined with Figure 2 As shown, the guide mechanism 410 has a first mounting portion 4111 at one end near the first positioning portion 121, and a second mounting portion 4121 at the other end. This can be combined with... Figure 3 As shown, the moving conductive rod 300 has a second positioning part 310 on its body. The second positioning part 310 includes an axial positioning part 311 and a circumferential positioning part 312 connected to each other. The axial positioning part 311 and the circumferential positioning part 312 are configured such that the second mounting part 4121 can be mounted on the axial positioning part 311 along the axial direction of the moving conductive rod 300, and can rotate around the axial direction of the moving conductive rod 300 until it abuts against the circumferential positioning part 312. When the second mounting part 4121 and the circumferential positioning part 312 abut against each other, the first mounting part 4111 and the first positioning part 121 are aligned and matched with each other.

[0038] Specifically, during operation, the axial movement of the moving conductive rod 300 in the vacuum interrupter 10 described above can drive the guide mechanism 410 and the bellows body 420 to move synchronously, thereby realizing the opening and closing action of the vacuum interrupter 10. Understandably, the guide mechanism 410 is configured as a telescopic guide structure to correspondingly achieve full-stroke radial support for the bellows body 420.

[0039] The vacuum interrupter 10 described in this application, through the dual positioning linkage of the axial positioning part 311 and the circumferential positioning part 312, achieves precise assembly of the guide mechanism 410 and the moving conductive rod 300 on the one hand, and self-calibration of the installation alignment between the guide mechanism 410 and the moving end cover plate 120 on the other hand. This completely eliminates the traditional assembly method of manual visual alignment and repeated debugging, greatly improves the installation accuracy of the guide mechanism 410 in the vacuum interrupter 10, effectively avoids problems such as bellows support failure and movement jamming of the moving conductive rod 300 caused by installation deviation, reduces potential safety risks caused by improper installation, and the standardized positioning assembly method also improves the consistency and quality control of product production, making it suitable for large-scale mass production.

[0040] Furthermore, the vacuum interrupter 10 described above in this application, through the setting of the guide mechanism 410, can also provide radial support for the bellows body 420 sleeved on its outer peripheral wall, prevent the bellows from undergoing radial instability and deformation, improve the protection of the bellows body 420, and improve the movement accuracy of the moving conductive rod 300 passing through the guide mechanism 410.

[0041] It is also worth noting that the design of the vacuum interrupter 10 described in this application, which involves the second mounting part 4121 of the guide mechanism 410 and the second positioning part 310 of the moving conductive rod 300 assembling together, helps to directly bind the power source of the guide mechanism 410 to the moving conductive rod 300, cutting off the power transmission between the bellows body 420 and the guide mechanism 410. This avoids the need to rely on the tensile restoring force of the bellows body 420 itself to drive the telescopic movement of the guide mechanism 410. Thus, while providing radial support for the bellows, the guide mechanism 410 of this application can avoid the bellows body 420 bearing the traction load of the guide shaft 412, thereby avoiding fatigue fracture of the bellows body 420 and vacuum failure of the vacuum interrupter 10. This improves the stability and reliability of the opening and closing operation of the vacuum interrupter 10, effectively extends the service life of the vacuum interrupter 10, and meets the long-term stable operation requirements of medium and high voltage power systems.

[0042] In some embodiments, the insulating shell 110 may be made of ceramic material, which helps to improve the insulation effect of the insulating shell 110.

[0043] Please combine Figure 1 and Figure 2 As shown, in some embodiments, the first mounting part 4111 may include a first positioning hole 4111a, and the moving end cover plate 120 is provided with a second positioning hole 121a. The first positioning hole 4111a and the second positioning hole 121a are configured such that when the second mounting part 4121 and the circumferential positioning part 312 abut against each other and are limited, the first positioning hole 4111a and the second positioning hole 121a are aligned and matched with each other.

[0044] Specifically, when the first positioning hole 4111a and the second positioning hole 121a are aligned and matched, fasteners such as positioning pins and bolts can be inserted into the aligned first positioning hole 4111a and the second positioning hole 121a to quickly complete the fixed connection between the guide mechanism 410 and the moving end cover plate 120.

[0045] It is worth noting that the aforementioned design of "when the second mounting part 4121 and the circumferential positioning part 312 abut against each other and are mutually matched, the first positioning hole 4111a and the second positioning hole 121a are mutually aligned and matched" provides precise guidance for the installation of fasteners such as positioning pins and bolts through the precise alignment of the positioning holes, avoiding the skewing during fastener installation and improving the firmness and coaxiality of the connection between the guide mechanism 410 and the moving end cover plate 120. On the other hand, it simplifies the assembly and positioning steps. After the second mounting part 4121 and the second positioning part 310 of the guide mechanism 410 are assembled, the first positioning hole 4111a and the second positioning hole 121a automatically complete the mutual alignment and matching, thus improving the assembly efficiency.

[0046] In addition, the circular hole positioning structure of the first positioning hole 4111a and the second positioning hole 121a has a mature processing technology and easy precision control, which can effectively control the production and manufacturing cost. Moreover, the matching method between the positioning hole and the fastener has good versatility, which facilitates later maintenance and parts replacement.

[0047] In this embodiment, optionally, the first mounting part 4111 can be configured as a flange, whose flat end face can fit tightly against the surface of the moving end cover plate 120, increasing the contact area and improving the stability of the connection. At the same time, the structural design of the flange also provides sufficient structural space for the opening of the first positioning hole 4111a, avoiding the reduction of structural strength caused by the opening.

[0048] Please continue reading. Figure 2 In some embodiments, the guiding mechanism 410 may include a guide sleeve 411 and a guide shaft 412. The guide sleeve 411 and the guide shaft 412 are coaxially arranged and can slide relative to each other along the axial direction. The coaxial axis is configured as a first axis 500. Both the guide sleeve 411 and the guide shaft 412 are provided with a hollow portion 600, and the movable conductive rod 300 passes through the hollow portion 600. Figure 1 As shown, the first mounting part 4111 is disposed at the end of the guide sleeve 411 away from the second positioning part 310 in the direction of the first axis 500, and the second mounting part 4121 is disposed at the end of the guide shaft 412 away from the moving end cover plate 120 in the direction of the first axis 500.

[0049] Specifically, the design of the guide sleeve 411 and the guide shaft 412 being coaxially arranged and slidable relative to each other along the axial direction enables the telescopic cooperation structure of the guide mechanism 410. This telescopic guide mechanism 410 design can synchronously extend and retract with the axial movement of the conductive rod 300, adapting to the full-stroke extension and retraction requirements of the bellows body 420, providing continuous radial support for the bellows body 420. At the same time, the guide mechanism 410 is divided into a fixed guide sleeve 411 and a moving guide shaft 412, making the division of guiding and supporting functions clear, the structural design more reasonable, and greatly improving the working stability and service life of the guide mechanism 410.

[0050] Please reassemble Figure 1 and Figure 4 As shown, in some embodiments, the guide shaft 412 has an inner wall 412a, and the second mounting portion 4121 is disposed on the inner wall 412a. The second mounting portion 4121 may be configured as a protrusion. Combined with... Figure 1 and Figure 3 As shown, the second positioning part 310 can be configured as an annular flange integrally formed along the circumference of the rod body of the moving conductive rod 300, the axial positioning part 311 is configured as an axial groove provided on the annular flange, and the circumferential positioning part 312 is configured as a circumferential groove provided on the annular flange. The protrusion can be engaged with the axial groove and the circumferential groove.

[0051] Specifically, during assembly, simply align the protrusion on the inner wall 412a of the guide shaft 412 with the axial groove of the annular flange, push the guide shaft 412 axially, and the protrusion will slide into the axial groove until it reaches the connection between the axial groove and the circumferential groove. Then rotate the guide shaft 412 to make the protrusion slide into the circumferential groove and abut against the limiting surface of the circumferential groove. This completes the precise assembly of the guide shaft 412 and the moving conductive rod 300, and simultaneously achieves the positioning linkage between the first mounting part 4111 and the first positioning part 121.

[0052] Furthermore, the snap-fit ​​positioning structure between the protrusion and the groove is simple to manufacture and easy to assemble, requiring no special assembly tools and significantly improving assembly efficiency. Simultaneously, the rigid fit between the protrusion and the groove ensures no relative displacement, guaranteeing the synchronous movement of the guide shaft 412 and the moving conductive rod 300. This ensures the precise movement of the guide shaft 412 following the extension and retraction of the moving conductive rod 300, providing real-time radial support for the bellows body 420. Moreover, this snap-fit ​​positioning structure is an internal design, located between the inner wall 412a of the guide shaft 412 and the moving conductive rod 300, without occupying external space or interfering with the bellows body 420, thus improving the overall structural compactness.

[0053] Please combine Figure 1 and Figure 2 As shown, in some embodiments, the guide sleeve 411 further includes a guide sleeve body 4112 integrally formed with the first mounting portion 4111. The guide sleeve body 4112 is provided with at least two keyways 4112a spaced apart around the first axis 500. The guide shaft 412 further includes a guide shaft body 4122 integrally formed with the second mounting portion 4121. The guide shaft body 4122 is provided with at least two guide keys 4122a spaced apart around the first axis 500. The guide keys 4122a are provided in one-to-one correspondence with the keyways 4112a, and the guide keys 4122a can slide relative to the keyways 4112a along the direction of the first axis 500.

[0054] Specifically, the mating structure of the keyway 4112a and the guide key 4122a provides precise axial guidance for the relative telescopic movement of the guide sleeve 411 and the guide shaft 412, ensuring that their telescopic movement always occurs along the first axis 500 without radial offset. This guarantees the cylindricity of the outer peripheral wall of the guide mechanism 410, thereby providing uniform radial support for the bellows body 420. Simultaneously, the mating structure of the keyway 4112a and the guide key 4122a enables circumferential anti-rotation, thus preventing relative torsion between the guide sleeve 411 and the guide shaft 412 and improving the structural stability of the guide sleeve 411 and guide shaft 412.

[0055] In some embodiments, the keyway 4112a and the guide key 4122a may be fan-shaped in the direction perpendicular to the first axis 500.

[0056] Specifically, the arc surface of the fan shape is adapted to the curvature of the inner peripheral wall of the bellows body 420, and the two sides of the fan-shaped structure are inclined surfaces, which can realize the sliding fit between the guide key 4122a and the keyway 4112a, reducing the assembly difficulty. At the same time, the abutting fit of the inclined surfaces can further improve the reliability of circumferential anti-rotation, prevent the guide key 4122a from moving within the keyway 4112a, and improve the assembly stability.

[0057] Of course, in other embodiments, the cross-sections of the keyway 4112a and the guide key 4122a in the direction perpendicular to the first axis 500 may also be in other shapes, such as rectangular or T-shaped.

[0058] In some embodiments, the inner diameter of the guide sleeve 411 is the same as the inner diameter of the guide shaft 412, so that the hollow portion 600 of the two forms a continuous and smooth cylindrical hole. When the moving conductive rod 300 is inserted therein, the movement resistance is smaller and there will be no jamming due to a sudden change in the hole diameter, thus ensuring the smooth axial movement of the moving conductive rod 300.

[0059] In some embodiments, the outer diameter of the guide sleeve 411 is the same as the outer diameter of the guide shaft 412, so that the outer peripheral walls of the guide sleeve 411 and the guide shaft 412 form a continuous and flush cylindrical surface without steps or protrusions. This avoids local stress concentration in the bellows body 420 due to unevenness of the outer peripheral wall and improves the uniformity of radial support.

[0060] In some embodiments, the outer peripheral wall of the guide shaft 412 and the guide sleeve 411 abuts against the inner peripheral wall of the bellows body 420.

[0061] Specifically, this abutting design allows the outer peripheral wall of the guide mechanism 410 to form a surface-to-surface contact with the inner peripheral wall of the bellows body 420, ensuring that the radial support force is evenly distributed across the entire inner peripheral wall of the bellows body 420. This prevents deformation or damage to the bellows body 420 wall caused by localized stress concentration. When the bellows body 420 experiences radial bulging or twisting deformation due to internal and external pressure differences, the rigid outer peripheral wall of the guide mechanism 410 directly abuts and limits the bellows body 420, preventing instability and deformation at the source and ensuring that the bellows body 420 always performs axial expansion and contraction. Simultaneously, the tight abutting fit ensures that the support of the guide mechanism 410 remains effective throughout the entire expansion and contraction process of the bellows body 420, with no blind spots, preventing the bellows body 420 from tilting during movement.

[0062] Please see Figure 1In some embodiments, the vacuum interrupter 10 further includes a shield 700, which is housed within the vacuum cavity of the insulating shell 110, and the end contact of the moving conductive rod 300 extends into the shield 700 to correspond to the contact of the stationary conductive rod 200.

[0063] Specifically, the shield 700 can effectively absorb the metal vapor generated by the electric arc during the opening and closing process, preventing the metal vapor from adhering to the inner wall 412a of the insulating shell 110 and causing a decrease in insulation performance. At the same time, it can also uniformly distribute the electric field in the vacuum cavity, improve the insulation level and breaking capacity of the vacuum interrupter 10, and cooperate with the guide mechanism 410 of this application to further improve the overall operational reliability and service life of the vacuum interrupter 10.

[0064] Optionally, the shield 700 may be made of metal, but is not limited to.

[0065] According to another aspect of this application, this application also provides a high-voltage power equipment, including the vacuum interrupter 10 described above. The high-voltage power equipment also includes an operating mechanism (not shown), which is connected to the moving conductive rod 300. The operating mechanism is used to drive the moving conductive rod 300 to move axially along the insulating shell 110.

[0066] Specifically, the output end of the operating mechanism is connected to the end of the moving conductive rod 300 of the vacuum interrupter 10 away from the stationary conductive rod 200, which can drive the moving conductive rod 300 to reciprocate along the axial direction of the insulating shell 110, thereby realizing the opening and closing operation of the vacuum interrupter 10.

[0067] Optionally, the high-voltage power equipment can be implemented as, but is not limited to, various medium- and high-voltage power switchgear such as high-voltage circuit breakers, high-voltage load switches, and high-voltage disconnect switches. This application applies a vacuum interrupter 10 equipped with a guide mechanism 410400 featuring a rotary locking alignment function to high-voltage power equipment. This not only solves the problem of low installation accuracy in traditional guide structures, improving assembly accuracy and production consistency, but also ensures the opening and closing accuracy and operational stability of the vacuum interrupter 10 through the reliable support of the bellows body 420 and the precise guidance of the moving conductive rod 300 provided by the guide mechanism 410. This effectively solves the problem of deformation and failure of long-stroke bellows under high voltage levels, enabling the equipment to adapt to the grid requirements of higher voltage levels and more complex operating conditions. Simultaneously, the high reliability and long service life of the guide mechanism 410 also reduce the maintenance frequency and operating costs of the high-voltage power equipment, improving the overall safe and stable operation level of the high-voltage power equipment.

[0068] 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.

[0069] 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 vacuum interrupter, characterized in that, The vacuum interrupter chamber includes: A housing assembly, comprising an insulating shell, a moving end cover plate, and a stationary end cover plate, wherein the insulating shell has openings at both ends, and the moving end cover plate and the stationary end cover plate respectively cover the openings at both ends of the insulating shell; A stationary conductive rod, wherein the stationary conductive rod passes through the stationary end cover plate; A movable conductive rod, wherein the movable conductive rod passes through the movable end cover plate; A bellows assembly, the bellows assembly being housed within the insulating shell, wherein the bellows assembly includes a guide mechanism and a bellows body sleeved on the guide mechanism, the guide mechanism being sleeved on the movable conductive rod; The moving end cover plate is provided with a first positioning part, the guide mechanism is provided with a first mounting part at one end near the first positioning part, the guide mechanism is provided with a second mounting part at the other end, and the moving conductive rod is provided with a second positioning part on its body. The second positioning part includes an axial positioning part and a circumferential positioning part connected to each other, and the axial positioning part and the circumferential positioning part are configured as follows: The second mounting part can be assembled onto the axial positioning part along the axial direction of the movable conductive rod, and can rotate around the axial direction of the movable conductive rod until it abuts against the circumferential positioning part. When the second mounting part and the circumferential positioning part abut against each other, the first mounting part and the first positioning part are aligned and matched.

2. The vacuum interrupter according to claim 1, characterized in that, The first mounting part includes a first positioning hole, and the moving end cover is provided with a second positioning hole. The first positioning hole and the second positioning hole are configured such that when the second mounting part and the circumferential positioning part abut against each other and are mutually limited, the first positioning hole and the second positioning hole are mutually aligned and matched.

3. The vacuum interrupter according to claim 1, characterized in that, The guiding mechanism includes a guide sleeve and a guide shaft. The guide sleeve and the guide shaft are coaxially arranged and can slide relative to each other along the axial direction. The coaxial axis is configured as a first axis. Both the guide sleeve and the guide shaft are provided with hollow portions. The movable conductive rod passes through the hollow portion. The first mounting portion is located at the end of the guide sleeve away from the second positioning portion in the first axial direction. The second mounting portion is located at the end of the guide shaft away from the movable end cover plate in the first axial direction.

4. The vacuum interrupter according to claim 3, characterized in that, The guide shaft has an inner wall, and the second mounting part is located on the inner wall. The second mounting part is configured as a protrusion, and the second positioning part is configured as an annular flange integrally formed along the circumference of the moving conductive rod. The axial positioning part is configured as an axial groove provided on the annular flange, and the circumferential positioning part is configured as a circumferential groove provided on the annular flange. The protrusion can be engaged with the axial groove and the circumferential groove.

5. The vacuum interrupter according to claim 3, characterized in that, The guide sleeve further includes a guide sleeve body integrally formed with the first mounting part. The guide sleeve body is provided with at least two keyways spaced around the first axis. The guide shaft further includes a guide shaft body integrally formed with the second mounting part. The guide shaft body is provided with at least two guide keys spaced around the first axis. The guide keys are provided in one-to-one correspondence with the keyways, and the guide keys can slide relative to the keyways along the direction of the first axis.

6. The vacuum interrupter according to claim 5, characterized in that, In the direction perpendicular to the first axis, the keyway and the guide key form a fan shape.

7. The vacuum interrupter according to claim 3, characterized in that, The inner diameter of the guide sleeve is the same as the inner diameter of the guide shaft; and / or, the outer diameter of the guide sleeve is the same as the outer diameter of the guide shaft.

8. The vacuum interrupter according to claim 3, characterized in that, The guide shaft and the outer peripheral wall of the guide sleeve abut against the inner peripheral wall of the bellows body.

9. The vacuum interrupter according to claim 1, characterized in that, The vacuum interrupter also includes a shield, and the end contact of the moving conductive rod extends into the shield and corresponds to the contact of the stationary conductive rod.

10. A high-voltage power equipment, comprising the vacuum interrupter chamber according to any one of claims 1-9, characterized in that, The high-voltage power equipment also includes an operating mechanism connected to the movable conductive rod, which is used to drive the movable conductive rod to move axially along the insulating shell.

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