Vacuum arc-extinguishing chamber and vacuum circuit breaker

Abstract

The invention relates to a vacuum arc-extinguishing chamber and a vacuum circuit breaker. The vacuum arc-extinguishing chamber comprises a shell, a static side conductive mechanism and a movable side conductive mechanism, and the shell is provided with a first cavity. The static side conducting mechanism comprises a static end conducting rod and a static end contact, the static end contact is arranged at the end of the static end conducting rod, and the static end contact is arranged in the first cavity. The movable side conducting mechanism comprises a movable conducting assembly, a fixed conducting assembly and a conducting connecting piece, the fixed conducting assembly is installed in the first cavity of the shell, the movable conducting assembly comprises a movable end conducting rod and a movable end contact, the movable end contact is arranged at the end of the movable end conducting rod, and the movable end conducting rod movably penetrates through the shell; the movable end contact is arranged in the first cavity relative to the static end contact, the movable end contact can be connected with or disconnected from the static end contact, and the movable conductive assembly and the fixed conductive assembly are electrically connected through a conductive connecting piece. The vacuum arc-extinguishing chamber and the vacuum circuit breaker have the advantages of being good in breaking performance and low in damage rate.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a vacuum interrupter and a vacuum circuit breaker. Background Art

[0002] With the rapid development of vacuum circuit breakers in power systems, the performance requirements for vacuum circuit breakers are getting higher and higher. The current in the vacuum circuit breaker flows through the vacuum interrupter. The static side conductive mechanism of the vacuum interrupter is directly connected to the static support, and the dynamic side conductive mechanism is connected to the dynamic support through a conductive clip and a flexible connection. The interior of the vacuum interrupter is a vacuum environment, and the circuit is opened or closed by controlling the state of the contact structure.

[0003] The opening speed and closing bounce are important indicators for evaluating whether it has excellent breaking performance. The vacuum interrupter is a single contact structure. In order to improve the current conduction performance of the conductive rod, it is often necessary to set the cross-sectional area of ​​the conductive rod to be larger, and the mass of the conductive rod is correspondingly larger, which brings greater challenges to solving the opening movement speed and contact closing bounce problems. If the mass of the conductive rod is too large, the contact opening movement speed will be difficult to increase, and the contact closing bounce will have a greater impact on the mechanism, and the mechanical damage to the contact will also be greater, resulting in poor breaking performance and high damage rate. Summary of the invention

[0004] Based on this, it is necessary to provide a vacuum interrupter and a vacuum circuit breaker to address the problems of poor breaking performance and high damage rate of the vacuum interrupter.

[0005] In a first aspect, a vacuum interrupter and a vacuum circuit breaker are provided, comprising:

[0006] A housing, wherein the housing is provided with a first chamber;

[0007] a static side conductive mechanism, the static side conductive mechanism comprising a static end conductive rod and a static end contact, the static end contact is arranged at the end of the static end conductive rod, the static end conductive rod penetrates the housing, and the static end contact is arranged in the first chamber; and

[0008] A moving side conductive mechanism, the moving side conductive mechanism includes a movable conductive component, a fixed conductive component and a conductive connector, the fixed conductive component is installed in the first chamber of the shell, the movable conductive component includes a movable end conductive rod and a movable end contact, the movable end contact is arranged at the end of the movable end conductive rod, the movable end conductive rod can be movably arranged through the shell, and the movable end contact is arranged in the first chamber relative to the static end contact, the movable end contact can be connected or disconnected with the static end contact, and the movable conductive component and the fixed conductive component are electrically connected through the conductive connector.

[0009] In one embodiment, the diameter of the movable end conductive rod is smaller than the diameter of the static end conductive rod.

[0010] In one embodiment, the movable conductive component also includes a telescopic tube and a connecting ring, the telescopic tube is sleeved on the outside of the movable end conductive rod, the connecting ring is sleeved and connected to the outer side wall of the movable end conductive rod, one end of the telescopic tube is sealedly connected to the connecting ring, and the other end of the telescopic tube is sealedly connected to the shell, and the movable end conductive rod can drive the telescopic tube to extend and retract through the connecting ring.

[0011] In one embodiment, the fixed conductive component includes a flow guide tube and a conductive disk, the conductive disk is installed on the end surface of the shell where the moving side conductive mechanism is set, the flow guide tube is set in the first chamber, one end of the flow guide tube is electrically connected to the conductive disk, the moving end conductive rod can be movably passed through the interior of the flow guide tube, and the other end of the flow guide tube is electrically connected to the conductive connector.

[0012] In one of the embodiments, the fixed conductive component further includes a limiting cover, which is installed at one end of the flow guide tube close to the movable end contact, and the movable end contact can be movably clamped in the limiting cover.

[0013] In one embodiment, the conductive connecting piece is a conductive flexible connection, which is arranged around the outer circumferential surface of the movable end conductive rod, one end of the conductive flexible connection is connected to the flow guide tube, and the other end of the conductive flexible connection is connected to the movable end contact, and the conductive flexible connection is provided with a plurality of notches at circumferential intervals, and the extension direction of the notches is consistent with the movement direction of the conductive rod.

[0014] In one embodiment, the static end contact comprises a static end contact seat and a static end contact sheet, the bottom of the static end contact seat is connected to the static end conductive rod, and the static end contact sheet is installed on the static end contact seat;

[0015] The movable end contact comprises a movable end contact seat and a movable end contact piece, the bottom of the movable end contact seat is connected to the movable end conductive rod, the movable end contact piece is installed on the movable end contact seat, and the static end contact piece and the movable end contact piece are arranged opposite to each other.

[0016] In one embodiment, the shell includes a static side cover plate and a dynamic side cover plate, the static side cover plate is installed at one end of the shell, the static side cover plate is provided with a first through hole, and the static end conductive rod can be movably inserted into the first through hole, and the dynamic side cover plate is arranged at the other end of the shell, the dynamic side cover plate is provided with a second through hole, and the dynamic end conductive rod can be movably inserted into the second through hole.

[0017] In one of the embodiments, the housing further includes a shielding cover, which is disposed inside the first chamber and surrounds the outer sides of the static contact and the movable contact.

[0018] In a second aspect, a vacuum circuit breaker is provided, comprising the vacuum interrupter described in any one of the above embodiments.

[0019] The above-mentioned vacuum arc extinguishing chamber and vacuum circuit breaker are achieved by installing the static side conductive mechanism at one end of the shell, and the dynamic side conductive mechanism can be movably installed at the other side of the shell. The static end contact is set at the end of the static end conductive rod of the static side conductive mechanism. The dynamic side conductive mechanism is divided into a movable conductive component and a fixed conductive component. The movable end contact is set at the end of the movable end conductive rod of the movable conductive component. The movable end contact and the static end contact are relatively arranged in the first chamber of the shell, so that the movable end contact can be movably connected or disconnected with the static end contact. The fixed conductive component is also arranged in the first chamber, and the movable end contact and the fixed conductive component are electrically connected through a conductive connector, so that the movable end conductive rod and the fixed conductive component can conduct current at the same time. The fixed conductive component can share the current conducting pressure of the movable end conductive rod, so that the cross-sectional area and mass of the movable end conductive rod are smaller, thereby improving the opening movement speed of the movable conductive component and reducing the impact of the movable end contact on the static end contact, and has the advantages of good breaking performance and low damage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the vacuum arc extinguishing chamber described in the embodiment of the present application.

[0021] Figure 2 This is a schematic diagram of the closing of the vacuum interrupter described in the embodiment of the present application.

[0022] Figure 3 This is a schematic diagram of the internal structure of the vacuum arc extinguishing chamber described in an embodiment of the present application.

[0023] Figure 4 This is a schematic diagram of the structure of the movable conductive components of the vacuum arc chamber described in an embodiment of the present application.

[0024] Figure Number:

[0025] 100, housing; 100A, first chamber; 110, moving side cover plate; 120, stationary side cover plate; 130, shielding cover;

[0026] 200, static side conductive mechanism; 210, static end conductive rod; 220, static end contact; 221, static end contact seat; 222, static end contact sheet;

[0027] 300, conductive mechanism on the moving side; 310, movable conductive assembly; 311, conductive rod on the moving end; 312, contact on the moving end; 3121, contact seat on the moving end; 3122, contact sheet on the moving end; 313, telescopic tube; 314, connecting ring; 320, fixed conductive assembly; 321, flow guide tube; 322, conductive disk; 323, limit cover; 330, conductive connector; 330A, notch. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] See also Figure 1 and Figure 2 , shows a schematic diagram of the structure of a vacuum interrupter and a vacuum circuit breaker in an embodiment of the present application, wherein the vacuum interrupter comprises a housing 100, a static side conductive mechanism 200 and a dynamic side conductive mechanism 300, wherein the housing 100 is provided with a first chamber 100A, and the interior of the first chamber 100A is set to a vacuum state. The static side conductive mechanism 200 comprises a static end conductive rod 210 and a static end contact 220, wherein the static end contact 220 is arranged at the end of the static end conductive rod 210, the static end conductive rod 210 is arranged through the housing 100, and the static end contact 220 is arranged in the first chamber 100A. The moving side conductive mechanism 300 includes a movable conductive component 310, a fixed conductive component 320 and a conductive connector 330. The fixed conductive component 320 is installed in the first chamber 100A of the shell 100. The movable conductive component 310 includes a movable end conductive rod 311 and a movable end contact 312. The movable end contact 312 is arranged at the end of the movable end conductive rod 311. The movable end conductive rod 311 can be movably arranged through the shell 100, and the movable end contact 312 is arranged in the first chamber 100A relative to the static end contact 220. The movable end contact 312 can be connected or disconnected with the static end contact 220. The movable conductive component 310 and the fixed conductive component 320 are electrically connected through the conductive connector 330. The movable end conductive rod 311 and the fixed conductive component 320 jointly guide the moving side of the vacuum arc chamber.

[0035] The vacuum interrupter described in the embodiment of the present application is that the static side conductive mechanism 200 is installed at one end of the housing 100, and the dynamic side conductive mechanism 300 can be movably installed at the other side of the housing 100. The static end contact 220 is arranged at the end of the static end conductive rod 210 of the static side conductive mechanism 200. The dynamic side conductive mechanism 300 is divided into a movable conductive component 310 and a fixed conductive component 320. The end of the movable end conductive rod 311 of the movable conductive component 310 is provided with a movable end contact 312. The movable end contact 312 and the static end contact 220 are relatively arranged in the first chamber 100A of the housing 100, so that the movable end contact 312 can be movably connected or disconnected from the static end contact 220. The fixed conductive component 320 is also arranged in the first chamber 100A, and the movable end contact 312 and the fixed conductive component 320 are electrically connected through the conductive connector 330, so that the movable end conductive rod 311 and the fixed conductive component 320 conduct current at the same time.

[0036] The vacuum arc extinguishing chamber described in the embodiment of the present application is configured with a fixed conductive component 320 and a moving end conductive rod 311 to conduct current together, so that the fixed conductive component 320 can share the conducting pressure of the moving end conductive rod 311, making the cross-sectional area and mass of the moving end conductive rod 311 smaller, thereby improving the opening movement speed of the movable conductive component 310 and reducing the impact of the moving end contact 312 on the static end contact 220, and has the advantages of good breaking performance and low damage rate.

[0037] In an exemplary embodiment, the diameter of the movable conductive rod 311 is smaller than the diameter of the stationary conductive rod 210. By setting the fixed conductive assembly 320 to bear the flow pressure of the movable conductive rod 311, the diameter of the movable conductive rod 311 can be reduced, thereby reducing the mass of the movable conductive rod 311.

[0038] Combination Figure 3 , shows a schematic diagram of the internal structure of a vacuum arc extinguishing chamber and a vacuum circuit breaker in an embodiment of the present application. In some embodiments, the movable conductive component 310 also includes a telescopic tube 313 and a connecting ring 314. The telescopic tube 313 is sleeved on the outside of the movable end conductive rod 311, and the connecting ring 314 is sleeved and connected to the outer side wall of the movable end conductive rod 311. One end of the telescopic tube 313 is sealedly connected to the connecting ring 314, and the other end of the telescopic tube 313 is sealedly connected to the housing 100. The movable end conductive rod 311 can drive the telescopic tube 313 to extend and retract through the connecting ring 314. By setting the telescopic tube 313 to be sleeved on the outside of the movable end conductive rod 311, one end of the telescopic tube 313 is sealedly connected to the outer wall of the movable end conductive rod 311 through the connecting ring 314, and the other end of the telescopic tube 313 is sealedly connected to the shell 100, so that the movable end conductive rod 311 can be movably arranged while maintaining a sealed vacuum state in the first chamber 100A. When the movable end conductive rod 311 moves, the telescopic tube 313 can be driven to extend or shorten, thereby adapting to the movement process of the movable end conductive rod 311.

[0039] Furthermore, if Figure 3 As shown, since the diameter of the moving end conductive rod 311 is reduced under the sharing of the fixed conductive component 320, the inner diameter of the telescopic tube 313 is also reduced along with the diameter of the moving end conductive rod 311. Since the movement resistance of the vacuum arc chamber mainly comes from the telescopic tube 313, and since the self-closing force of the telescopic tube 313 is proportional to the square of its radius, the diameter of the moving end conductive rod 311 of the vacuum arc chamber in the prior art is relatively large, so the self-closing force of the telescopic tube 313 is relatively large, resulting in a relatively large movement resistance of the movable conductive component 310. This embodiment effectively reduces the diameter of the moving end conductive rod 311, thereby greatly reducing the diameter of the telescopic tube 313, thereby reducing the self-closing force, reducing the movement resistance of the movable conductive component 310, and improving the performance of the vacuum arc chamber.

[0040] In an exemplary embodiment, Figure 3 As shown, the telescopic tube 313 is a corrugated tube, and the inner diameter of the telescopic tube 313 in a compressed state is 0.5 mm-1.5 mm larger than the diameter of the movable end conductive rod 311 .

[0041] In an optional embodiment, if Figure 3 As shown, the fixed conductive component 320 includes a flow guide tube 321 and a conductive plate 322. The conductive plate 322 is installed on the end surface of the housing 100 where the movable side conductive mechanism 300 is set. The flow guide tube 321 is set in the first chamber 100A. One end of the flow guide tube 321 is electrically connected to the conductive plate 322. The movable end conductive rod 311 can be movably inserted into the interior of the flow guide tube 321. The other end of the flow guide tube 321 is electrically connected to the conductive connector 330. The conductive plate 322 can be used to connect to an external power supply device. By setting a flow guide tube 321 to be sleeved on the outside of the moving end conductive rod 311, a conductive disk 322 is installed on the moving side end of the shell 100, so that one end of the flow guide tube 321 is electrically connected to the conductive disk 322, and the other end of the flow guide tube 321 is electrically connected to the moving end contact 312 through the conductive connector 330, so that the current received by the moving end contact 312 is guided from both the flow guide tube 321 and the moving end conductive rod 311, thereby reducing the guiding pressure of the moving end conductive rod 311.

[0042] Furthermore, if Figure 3As shown, the fixed conductive component 320 also includes a limit cover 323, which is installed at one end of the flow guide tube 321 close to the moving end contact 312, and the moving end contact 312 can be movably clamped in the limit cover 323. By arranging the limit cover 323 at one end of the flow guide tube 321 close to the moving end contact 312, the moving end contact 312 is clamped in the limit cover 323 when the switch is opened, thereby limiting the range of movement of the movable conductive component 310, preventing the movable conductive component 310 from hitting the flow guide tube 321, and the limit cover 323 can also guide the movement direction of the moving end contact 312, so that the moving end contact 312 and the static end contact 220 are more accurately contacted when closing, which greatly improves the stability of the vacuum interrupter when in use.

[0043] In an exemplary embodiment, the limiting cover 323 is made of stainless steel, which has good electrical conductivity, thereby guiding the electric field lines of the moving-side conductive mechanism 300 and optimizing the electric field distribution of the moving-side conductive mechanism 300 .

[0044] In an optional embodiment, if Figure 4 As shown, the conductive connector 330 is a conductive flexible connector, which is arranged around the outer circumference of the movable end conductive rod 311, one end of the conductive flexible connector is connected to the flow guide tube 321, and the other end of the conductive flexible connector is connected to the movable end contact 312. The conductive flexible connector is provided with a plurality of slots 330A at intervals in the circumferential direction, and the extension direction of the slots 330A is consistent with the movement direction of the conductive rod. By setting the conductive connector 330 as a conductive flexible connector, the conductive flexible connector is a flexible conductive component for achieving electrical connection, which can be bent and twisted within a large angle range without breaking or being damaged, and has good conductive performance. The conductive flexible connector is arranged around the entire movable end conductive rod 311, and the two ends of the conductive flexible connector are respectively connected to the movable end contact 312 and the flow guide tube 321, and slots 330A are provided between the conductive flexible connectors, so that when the movable end contact 312 moves downward, the conductive flexible connector can be easily bent and folded outward, thereby avoiding affecting the movement of the movable conductive component 310 and avoiding affecting the flow of the fixed conductive component 320.

[0045] In an optional embodiment, if Figure 2 and Figure 3 As shown, the static end contact 220 includes a static end contact seat 221 and a static end contact sheet 222. The bottom of the static end contact seat 221 is connected to the static end conductive rod 210, and the static end contact sheet 222 is installed on the static end contact seat 221. By connecting the bottom of the static end contact seat 221 to the static end conductive rod 210, and the static end contact sheet 222 is covered on the static end contact seat 221, the current is guided from the static end conductive rod 210 to the movable conductive component 310 through the static end contact seat 221 and the static end contact sheet 222.

[0046] Similarly, if Figure 2 and Figure 3 As shown, the moving end contact 312 includes a moving end contact seat 3121 and a moving end contact piece 3122. The bottom of the moving end contact seat 3121 is connected to the moving end conductive rod 311, and the moving end contact piece 3122 is installed on the moving end contact seat 3121. The static end contact piece 222 and the moving end contact piece 3122 are arranged opposite to each other. By connecting the bottom of the moving end contact seat 3121 to the moving end conductive rod 311, and the moving end contact piece 3122 is covered on the moving end contact seat 3121, the moving end conductive rod 311 pushes the moving end contact seat 3121 and the moving end contact piece 3122 to contact the static side conductive mechanism 200, and receives the current of the moving end contact seat 3121 and the moving end contact piece 3122.

[0047] In an exemplary embodiment, Figure 2 and Figure 3 As shown, the static end contact seat 221 and the movable end contact seat 3121 are cup-shaped structures, the static end contact piece 222 is covered on the cup mouth of the static end contact seat 221 , and the movable end contact piece 3122 is covered on the cup mouth of the movable end contact seat 3121 .

[0048] In an optional embodiment, if Figure 1 As shown, the housing 100 includes a static side cover plate 120 and a dynamic side cover plate 110. The static side cover plate 120 is installed at one end of the housing 100. The static side cover plate 120 is provided with a first through hole. The static end conductive rod 210 can be movably inserted into the first through hole. The dynamic side cover plate 110 is provided at the other end of the housing 100. The dynamic side cover plate 110 is provided with a second through hole. The dynamic end conductive rod 311 can be movably inserted into the second through hole. The static side cover plate 120 and the dynamic side cover plate 110 are provided at the end of the housing 100, so that the static end conductive rod 210 is provided in the first through hole of the static side cover plate 120, and the dynamic end conductive rod 311 can be movably provided in the second through hole of the dynamic side cover plate 110.

[0049] In an optional embodiment, if Figure 1 As shown, the housing 100 further includes a shielding cover 130, which is disposed inside the first chamber 100A and is disposed around the outer sides of the static contact 220 and the moving contact 312. During the opening and closing process of the vacuum interrupter, a strong electric field will be generated between the contacts. By providing the shielding cover 130, the electric field distribution can be made more uniform, and excessive concentration of the electric field in local areas such as the contact edge can be avoided, thereby reducing problems such as contact burning and insulation breakdown caused by electric field concentration, and improving the insulation performance and service life of the vacuum interrupter.

[0050] On the other hand, the present application also provides a vacuum circuit breaker, which includes the vacuum arc chamber described in any of the above embodiments, as well as a static support, a conductive clamp, a flexible connection and a dynamic support. The static end conductive rod 210 of the vacuum arc chamber is connected to the static support, and the dynamic end conductive rod 311 is connected to the dynamic support through the conductive clamp and the flexible connection. The current in the vacuum circuit breaker flows through the vacuum arc chamber, and the interior of the vacuum arc chamber is a vacuum environment. The circuit is opened or closed by controlling the connection state of the static end contact 220 and the dynamic end contact 312. When the static end contact 220 and the dynamic end contact 312 are closed, the current can flow and the circuit is in a closed state; when the static end contact 220 and the dynamic end contact 312 are separated, the current is blocked and the circuit is in an open state.

[0051] The vacuum circuit breaker described in the embodiment of the present application is configured with a fixed conductive component 320 and a moving end conductive rod 311 to conduct current together, so that the fixed conductive component 320 can share the conducting pressure of the moving end conductive rod 311, making the cross-sectional area and mass of the moving end conductive rod 311 smaller, thereby improving the opening movement speed of the movable conductive component 310 and reducing the impact of the moving end contact 312 on the static end contact 220, and has the advantages of good breaking performance and low damage rate.

[0052] The vacuum interrupter and vacuum circuit breaker described in the embodiments of the present application have the following beneficial effects:

[0053] 1. By arranging the fixed conductive component 320 and the movable end conductive rod 311 to conduct the flow together, the fixed conductive component 320 can share the flow conducting pressure of the movable end conductive rod 311, making the cross-sectional area and mass of the movable end conductive rod 311 smaller, thereby improving the opening movement speed of the movable conductive component 310 and reducing the impact of the movable end contact 312 on the static end contact 220, which has the advantages of good breaking performance and low damage rate.

[0054] 2. By effectively reducing the diameter of the movable end conductive rod 311, the diameter of the telescopic tube 313 is greatly reduced, thereby reducing the self-closing force, reducing the movement resistance of the movable conductive component 310, and improving the performance of the vacuum interrupter.

[0055] 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.

[0056] 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 vacuum interrupter, characterized in that: include: A housing (100), wherein the housing (100) is provided with a first chamber (100A); a static side conductive mechanism (200), the static side conductive mechanism (200) comprising a static end conductive rod (210) and a static end contact (220), the static end contact (220) being arranged at an end of the static end conductive rod (210), the static end conductive rod (210) penetrating the housing (100), and the static end contact (220) being arranged in the first chamber (100A); and A movable-side conductive mechanism (300), the movable-side conductive mechanism (300) comprising a movable conductive component (310), a fixed conductive component (320) and a conductive connector (330), the fixed conductive component (320) being installed in the first chamber (100A) of the housing (100), the movable conductive component (310) comprising a movable-end conductive rod (311) and a movable-end contact (312), the movable-end contact (312) being arranged at the end of the movable-end conductive rod (311), the movable-end conductive rod (311) being movably arranged to penetrate the housing (100), and the movable-end contact (312) being arranged in the first chamber (100A) relative to the static-end contact (220), the movable-end contact (312) being able to connect or disconnect with the static-end contact (220), and the movable conductive component (310) and the fixed conductive component (320) being electrically connected via the conductive connector (330).

2. The vacuum interrupter according to claim 1, characterized in that: The diameter of the movable end conductive rod (311) is smaller than the diameter of the stationary end conductive rod (210).

3. The vacuum interrupter according to claim 1, characterized in that: The movable conductive component (310) further comprises a telescopic tube (313) and a connecting ring (314); the telescopic tube (313) is sleeved on the outside of the movable end conductive rod (311); the connecting ring (314) is sleeved and connected to the outer wall of the movable end conductive rod (311); one end of the telescopic tube (313) is sealedly connected to the connecting ring (314); the other end of the telescopic tube (313) is sealedly connected to the housing (100); the movable end conductive rod (311) can move through the connecting ring (314) to drive the telescopic tube (313) to extend and retract.

4. The vacuum interrupter according to claim 1, characterized in that: The fixed conductive component (320) comprises a flow guide tube (321) and a conductive disk (322); the conductive disk (322) is mounted on the end surface of the housing (100) on which the movable-side conductive mechanism (300) is arranged; the flow guide tube (321) is arranged in the first chamber (100A); one end of the flow guide tube (321) is electrically connected to the conductive disk (322); the movable-end conductive rod (311) is movably arranged inside the flow guide tube (321); and the other end of the flow guide tube (321) is electrically connected to the conductive connector (330).

5. The vacuum interrupter according to claim 4, characterized in that: The fixed conductive component (320) further comprises a limiting cover (323), wherein the limiting cover (323) is mounted on one end of the flow guide tube (321) close to the movable end contact (312), and the movable end contact (312) is movably clamped on the limiting cover (323).

6. The vacuum interrupter according to claim 4, characterized in that: The conductive connecting piece (330) is a conductive flexible connection, which is arranged around the outer circumference of the movable end conductive rod (311), one end of the conductive flexible connection is connected to the flow guide tube (321), and the other end of the conductive flexible connection is connected to the movable end contact (312), and a plurality of notches (330A) are arranged at intervals in the circumferential direction of the conductive flexible connection, and the extension direction of the notches (330A) is consistent with the movement direction of the conductive rod.

7. The vacuum interrupter according to claim 1, characterized in that: The static end contact (220) comprises a static end contact seat (221) and a static end contact sheet (222); the bottom of the static end contact seat (221) is connected to the static end conductive rod (210), and the static end contact sheet (222) is mounted on the static end contact seat (221); The movable end contact (312) comprises a movable end contact seat (3121) and a movable end contact piece (3122); the bottom of the movable end contact seat (3121) is connected to the movable end conductive rod (311); the movable end contact piece (3122) is mounted on the movable end contact seat (3121); and the static end contact piece (222) and the movable end contact piece (3122) are arranged relative to each other.

8. The vacuum interrupter according to claim 1, characterized in that: The housing (100) comprises a stationary side cover plate (120) and a dynamic side cover plate (110); the stationary side cover plate (120) is mounted on one end of the housing (100); the stationary side cover plate (120) is provided with a first through hole; the stationary end conductive rod (210) is movably inserted into the first through hole; the dynamic side cover plate (110) is arranged at the other end of the housing (100); the dynamic side cover plate (110) is provided with a second through hole; the dynamic end conductive rod (311) is movably inserted into the second through hole.

9. The vacuum interrupter according to claim 1, characterized in that: The housing (100) further comprises a shielding cover (130), wherein the shielding cover (130) is arranged inside the first chamber (100A), and the shielding cover (130) is arranged around the outer sides of the static end contact (220) and the dynamic end contact (312).

10. A vacuum circuit breaker, characterized in that: It comprises the vacuum interrupter chamber described in any one of claims 1 to 9.

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