Vacuum arc-extinguishing chamber and vacuum switch

Abstract

The invention relates to a vacuum arc-extinguishing chamber and a vacuum switch. The vacuum arc extinguish chamber comprises a static end conducting rod, a moving end conducting rod, a shielding cavity, a static end shell, a moving end shell, a static end heat dissipation mechanism and a moving end heat dissipation mechanism, one end of the static end conducting rod is provided with a static end contact, one end of the moving end conducting rod is provided with a moving end contact, and the static end contact and the moving end contact are oppositely arranged in a first cavity of the shielding cavity. The static end heat dissipation mechanism is arranged outside the static end conducting rod in a sleeving mode, the static end heat dissipation mechanism is arranged between the static end shell and the shielding cavity, and the two ends of the static end heat dissipation mechanism are connected with the shielding cavity and the static end shell respectively. The movable end heat dissipation mechanism is arranged outside the movable end conducting rod in a sleeving mode and arranged between the movable end shell and the shielding cavity, and the two ends of the movable end heat dissipation mechanism are connected with the shielding cavity and the movable end shell respectively. The vacuum arc extinguish chamber and the vacuum switch have the advantages of being high in heat dissipation effect and good in use stability.

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 switch. Background Art

[0002] With the rapid development and application of vacuum switches in high-voltage equipment, the requirements for the rated current carrying capacity of vacuum switches are getting higher and higher. The current in the vacuum switch flows through the vacuum interrupter, the static end of the vacuum interrupter is directly connected to the static support, and the dynamic end 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 contact structure of the vacuum interrupter is the main source of heat generation for its temperature rise, but the effective heat conduction paths of the traditional vacuum interrupter are only the static end conductive rod and the dynamic end conductive rod. Since the conductive rods of high-voltage equipment are long and there are many parts connected to the conductive rods, the heat dissipation of the contacts is affected, resulting in a high temperature rise at each temperature measuring point in the vacuum interrupter, which limits the current rating of the vacuum switch at high voltage levels and reduces the electrical life of the vacuum switch, resulting in poor heat dissipation and poor stability. Summary of the invention

[0004] Based on this, it is necessary to provide a vacuum interrupter and a vacuum switch to address the problems of poor heat dissipation and poor stability of the vacuum interrupter.

[0005] In a first aspect, a vacuum interrupter is provided, comprising:

[0006] A static end conductive rod and a dynamic end conductive rod, wherein one end of the static end conductive rod is provided with a static end contact, and one end of the dynamic end conductive rod is provided with a dynamic end contact, and the static end contact is arranged opposite to the dynamic end contact;

[0007] A shielding cavity, wherein the shielding cavity is provided with a first cavity, and two ends of the shielding cavity are provided with a first opening and a second opening, the static end contact is arranged in the first cavity through the first opening, and the movable end contact is arranged in the first cavity through the second opening;

[0008] A static end housing and a dynamic end housing, wherein the static end housing is sleeved on the outside of the static end conductive rod, and the dynamic end housing is sleeved on the outside of the dynamic end conductive rod;

[0009] A static end heat dissipation mechanism, wherein the static end heat dissipation mechanism is sleeved on the outside of the static end conductive rod, and the static end heat dissipation mechanism is arranged between the static end shell and the shielding cavity, one end cover of the static end heat dissipation mechanism is arranged on the first opening, and the other end of the static end heat dissipation mechanism is connected to the static end shell; and

[0010] The moving end heat dissipation mechanism is sleeved on the outside of the moving end conductive rod, and the moving end heat dissipation mechanism is arranged between the moving end shell and the shielding cavity, one end cover of the moving end heat dissipation mechanism is arranged on the second opening, and the other end of the moving end heat dissipation mechanism is connected to the moving end shell.

[0011] In one embodiment, the static end heat dissipation mechanism includes a static end heat conductive member, a static end heat sink and a static end shielding cover, the static end heat conductive member is provided with a first connecting through hole, the static end conductive rod is movably arranged in the first connecting through hole, one end of the static end heat conductive member is connected to one end of the shielding cavity, the other end of the static end heat conductive member is connected to the static end shell, the static end heat sink is arranged around the outer peripheral surface of the static end heat conductive member, and the static end shielding cover wraps the outer side surface of the static end heat sink;

[0012] The moving end heat dissipation mechanism includes a moving end heat conductor, a moving end heat sink and a moving end shielding cover. The moving end heat conductor is provided with a second connecting through hole. The moving end conductive rod can be movably arranged in the second connecting through hole. One end of the moving end heat conductor is connected to the other end of the shielding cavity, and the other end of the moving end heat conductor is connected to the moving end shell. The moving end heat sink is arranged around the outer peripheral surface of the moving end heat conductor, and the moving end shielding cover wraps the outer side surface of the moving end heat sink.

[0013] In one embodiment, the static end housing is provided with a second chamber, the static end heat conducting member is provided with a first heat dissipation through hole, and the first heat dissipation through hole connects the first chamber and the second chamber;

[0014] The movable end housing is provided with a third chamber, the movable end heat conducting member is provided with a second heat dissipation through hole, and the second heat dissipation through hole communicates with the first chamber and the third chamber.

[0015] In one embodiment, the static end heat conductive member is a cylinder, the first heat dissipation through holes include a plurality of first heat dissipation through holes, and the plurality of first heat dissipation through holes are arranged at intervals along the circumference of the static end heat conductive member;

[0016] The moving end heat conductor is a cylinder, and the second heat dissipation through holes include a plurality of the second heat dissipation through holes, which are arranged at intervals along the circumference of the moving end heat conductor.

[0017] In one embodiment, the static end heat conductive component and the dynamic end heat conductive component are both made of insulating heat conductive materials.

[0018] In one embodiment, the static end heat sink comprises a plurality of first heat sink gratings, the plurality of first heat sink gratings are arranged around the outer peripheral surface of the static end heat conducting member, and the extension direction of the first heat sink gratings is arranged along the radial direction of the static end conductive rod;

[0019] The moving end heat sink comprises a plurality of second heat sink grates, which are arranged around the outer peripheral surface of the moving end heat conductor, and the extending direction of the second heat sink grates is arranged along the radial direction of the moving end conductive rod.

[0020] In one embodiment, the number of the first heat dissipation gratings is greater than 20, and the length of the first heat dissipation gratings in the radial direction of the static end conductive rod is greater than 3 cm;

[0021] The number of the second heat dissipation gratings is greater than 20, and the length of the second heat dissipation gratings in the radial direction of the movable end conductive rod is greater than 3 cm.

[0022] In one embodiment, the static end shielding cover and the dynamic end shielding cover are both drum-shaped.

[0023] In one of the embodiments, the static end contact is a flat-plate contact, a longitudinal magnetic field contact or a transverse magnetic field contact; the moving end contact is a flat-plate contact, a longitudinal magnetic field contact or a transverse magnetic field contact.

[0024] In a second aspect, a vacuum switch is provided, comprising the vacuum interrupter chamber described in any one of the above embodiments.

[0025] The above-mentioned vacuum arc chamber and vacuum switch are achieved by arranging the static end contact of the static end conductive rod and the moving end contact of the moving end conductive rod relatively in the first chamber of the shielding cavity, and arranging a static end heat dissipation mechanism and a moving end heat dissipation mechanism at both ends of the shielding cavity respectively, and also arranging a static end shell connected to the static end heat dissipation mechanism, and arranging a moving end shell connected to the moving end heat dissipation mechanism. The static end contact and the moving end contact are sealed in the first chamber and contact each other to generate heat. The heat can be transferred and discharged through the static end heat dissipation mechanism and the moving end heat dissipation mechanism at both ends, thereby avoiding excessive temperature in the vacuum arc chamber, improving the rated current carrying capacity, and increasing the life of the vacuum switch. It has the advantages of high heat dissipation effect and good stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the vacuum arc extinguishing chamber described in an embodiment of the present application.

[0027] Figure 2 It is a schematic cross-sectional view of the vacuum interrupter described in the embodiment of the present application.

[0028] Figure 3 This is a schematic diagram of the installation of the static end heat dissipation mechanism described in an embodiment of the present application.

[0029] Figure 4 This is a schematic diagram of the structure of the static end heat dissipation mechanism described in an embodiment of the present application.

[0030] Figure 5This is a schematic diagram of the installation of the dynamic end heat dissipation mechanism described in an embodiment of the present application.

[0031] Figure 6 This is a schematic diagram of the structure of the moving end heat dissipation mechanism described in an embodiment of the present application.

[0032] Figure Number:

[0033] 100, static end conductive rod; 110, static end contact;

[0034] 200, moving end conductive rod; 210, moving end contact;

[0035] 300, shielding cavity; 300A, first cavity; 300B, first opening; 300C, second opening;

[0036] 400, static end housing; 400A, second chamber;

[0037] 500, moving end housing; 500A, third chamber;

[0038] 600, static end heat dissipation mechanism; 610, static end heat conducting member; 610A, first connecting through hole; 610B, first heat dissipation through hole; 620, static end heat sink; 621, first heat dissipation grid; 630, static end shielding cover;

[0039] 700, moving end heat dissipation mechanism; 710, moving end heat conductor; 710A, second connecting through hole; 710B, second heat dissipation through hole; 720, moving end heat sink; 721, second heat dissipation grid; 730, moving end shielding cover. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 1 and Figure 2 , shows a schematic diagram of the structure of a vacuum interrupter in an embodiment of the present application, wherein the vacuum interrupter comprises a static end conductive rod 100, a dynamic end conductive rod 200, a shielding cavity 300, a static end housing 400, a dynamic end housing 500, a static end heat dissipation mechanism 600 and a dynamic end heat dissipation mechanism 700, a static end conductive rod 100 is provided with a static end contact 110 at one end, a dynamic end conductive rod 200 is provided with a dynamic end contact 210 at one end, and the static end contact 110 is arranged opposite to the dynamic end contact 210. Specifically, the static end conductive rod 100 and the dynamic end conductive rod 200 are movably arranged along the same axis, and power can be transmitted when the static end contact 110 and the dynamic end contact 210 are in contact. The shielding cavity 300 is provided with a first cavity 300A, and a first opening 300B and a second opening 300C are provided at both ends of the shielding cavity 300. The first opening 300B and the second opening 300C are both connected to the first cavity 300A. The static end contact 110 is arranged in the first cavity 300A through the first opening 300B, and the movable end contact 210 is arranged in the first cavity 300A through the second opening 300C. The static end housing 400 is sleeved on the outside of the static end conductive rod 100, and the movable end housing 500 is sleeved on the outside of the movable end conductive rod 200. The static end heat dissipation mechanism 600 is sleeved on the outside of the static end conductive rod 100, and the static end heat dissipation mechanism 600 is arranged between the static end housing 400 and the shielding cavity 300, and one end cover of the static end heat dissipation mechanism 600 is arranged on the first opening 300B, and the other end of the static end heat dissipation mechanism 600 is connected to the static end housing 400. The moving end heat dissipation mechanism 700 is sleeved on the outside of the moving end conductive rod 200, and the moving end heat dissipation mechanism 700 is arranged between the moving end shell 500 and the shielding cavity 300, one end cover of the moving end heat dissipation mechanism 700 is arranged on the second opening 300C, and the other end of the moving end heat dissipation mechanism 700 is connected to the moving end shell 500.

[0047] The vacuum arc extinguishing chamber described in the embodiment of the present application is achieved by relatively arranging the static end contact 110 of the static end conductive rod 100 and the moving end contact 210 of the moving end conductive rod 200 in the first chamber 300A of the shielding cavity 300, and covering the first opening 300B of the shielding cavity 300 with a static end heat dissipation mechanism 600, and covering the second opening 300C with a moving end heat dissipation mechanism 700, and further providing a static end shell 400 connected to the static end heat dissipation mechanism 600, and providing a moving end shell 500 connected to the moving end heat dissipation mechanism 700. When the static end contact 110 and the moving end contact 210 are sealed in the first chamber 300A and in contact, heat is generated, and the heat can be transferred and discharged through the static end heat dissipation mechanism 600 and the moving end heat dissipation mechanism 700 at both ends.

[0048] The vacuum arc extinguishing chamber described in the embodiment of the present application, by arranging the static end contact 110 and the dynamic end contact 210 in the shielding cavity 300, and arranging the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 at both ends of the shielding cavity 300, so that the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 transfer and discharge the heat in the first chamber 300A, thereby avoiding the temperature in the vacuum arc extinguishing chamber from being too high, improving the rated current carrying capacity, and increasing the life of the vacuum switch, and has the advantages of high heat dissipation effect and good stability in use.

[0049] Combination Figure 3 and Figure 4 , shows a schematic diagram of the structure of the static end heat dissipation mechanism 600 of the vacuum arc extinguishing chamber in an embodiment of the present application. In some embodiments, the static end heat dissipation mechanism 600 includes a static end heat conductive member 610, a static end heat sink 620 and a static end shielding cover 630. The static end heat conductive member 610 is provided with a first connecting through hole 610A, and the static end conductive rod 100 can be movably arranged in the first connecting through hole 610A, that is, the static end conductive rod 100 can slide and switch positions in the first connecting through hole 610A. One end of the static end heat conductive member 610 is connected to one end of the shielding cavity 300, and the other end of the static end heat conductive member 610 is connected to the static end housing 400. The static end heat sink 620 is arranged around the outer peripheral surface of the static end heat conductive member 610, that is, the static end heat sink 620 is in contact with the outside air. The static end shielding cover 630 wraps the outer side of the static end heat sink 620. It should be noted that the static end shielding cover 630 only wraps the outer side of the static end heat sink 620, that is, the two end faces of the static end shielding cover 630 are through, so that the static end heat sink 620 is in contact with the external air. By setting the static end heat conductor 610 at the static end of the shielding cavity 300, the heat in the shielding cavity 300 is transferred to the static end heat conductor 610, and then the static end heat sink 620 is connected around the outer side wall of the static end heat conductor 610, so that the heat of the static end heat conductor 610 is transferred to the static end heat sink 620. Since the static end heat sink 620 has a large heat dissipation area, it is easy to dissipate heat into the air, thereby increasing the heat dissipation path of the vacuum arc chamber and reducing the temperature rise of the key position of the vacuum arc chamber.

[0050] Similarly, if Figure 5 and Figure 6 As shown, the moving end heat dissipation mechanism 700 includes a moving end heat conductive member 710, a moving end heat sink 720 and a moving end shielding cover 730. The moving end heat conductive member 710 is provided with a second connecting through hole 710A. The moving end conductive rod 200 can be movably arranged in the second connecting through hole 710A, that is, the moving end conductive rod 200 can slide and switch positions in the second connecting through hole 710A. One end of the moving end heat conductive member 710 is connected to the other end of the shielding cavity 300, and the other end of the moving end heat conductive member 710 is connected to the moving end housing 500. The moving end heat sink 720 is arranged around the outer peripheral surface of the moving end heat conductive member 710, and the moving end shielding cover 730 wraps the outer side surface of the moving end heat sink 720. It should be noted that the moving end shielding cover 730 only wraps the outer side surface of the moving end heat sink 720, that is, the two end surfaces of the moving end shielding cover 730 are through, so that the moving end heat sink 720 is in contact with the external air. By setting a static end heat conductor 610 at the static end of the shielding cavity 300, the heat in the shielding cavity 300 is transferred to the static end heat conductor 610, and then the static end heat sink 620 is connected around the outer wall of the static end heat conductor 610 to transfer the heat of the static end heat conductor 610 to the static end heat sink 620. Since the static end heat sink 620 has a large heat dissipation area, it is easy to dissipate heat into the air, thereby increasing the heat dissipation path of the vacuum arc chamber. The static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 at both ends jointly dissipate heat, effectively reducing the temperature rise at the key position of the vacuum arc chamber.

[0051] In an exemplary embodiment, the static end heat conductor 610 and the static end heat sink 620 are connected by welding, and the static end heat sink 620 and the static end shielding cover 630 are also connected by welding, so that the contact between the two is more stable and sufficient, and the heat transfer efficiency is improved. Similarly, the dynamic end heat conductor 710 and the dynamic end heat sink 720 are connected by welding, and the dynamic end heat sink 720 and the dynamic end shielding cover 730 are also connected by welding, so that the contact between the two is more stable and sufficient, and the heat transfer efficiency is improved.

[0052] In an alternative embodiment, if Figure 2 and Figure 3As shown, the static end housing 400 is provided with a second chamber 400A, and the static end heat conductive member 610 is provided with a first heat dissipation through hole 610B, and the first heat dissipation through hole 610B is connected with the first chamber 300A and the second chamber 400A. Specifically, the extension direction of the first heat dissipation through hole 610B is arranged along the axial direction of the static end conductive rod 100. By arranging the first heat dissipation through hole 610B on the static end heat conductive member 610, the first chamber 300A and the second chamber 400A of the static end housing 400 are connected, the contact area between the static end heat conductive member 610 and the heat is increased, and the heat dissipation efficiency of the static end heat dissipation mechanism 600 is improved. Furthermore, the metal vapor generated during the vacuum arc breaking process can also flow to the second chamber 400A through the first heat dissipation through hole 610B, so that the static end housing 400 can also be used for heat dissipation, thereby improving the heat dissipation capacity of the entire vacuum arc extinguishing chamber.

[0053] Similarly, if Figure 2 and Figure 5 As shown, the movable end housing 500 is provided with a third chamber 500A, and the movable end heat conductive member 710 is provided with a second heat dissipation through hole 710B, and the second heat dissipation through hole 710B connects the first chamber 300A and the third chamber 500A. Specifically, the extension direction of the second heat dissipation through hole 710B is arranged along the axial direction of the movable end conductive rod 200. By arranging the second heat dissipation through hole 710B on the movable end heat conductive member 710, the first chamber 300A and the third chamber 500A of the movable end housing 500 are connected, the contact area between the movable end heat conductive member 710 and the heat is increased, and the heat dissipation efficiency of the movable end heat dissipation mechanism 700 is improved. Furthermore, the metal vapor generated during the vacuum arc breaking process can also flow to the third chamber 500A through the second heat dissipation through hole 710B, so that the movable end housing 500 can also be used for heat dissipation, thereby improving the heat dissipation capacity of the entire vacuum arc extinguishing chamber.

[0054] In an optional embodiment, if Figure 4 and Figure 6 As shown, the first heat dissipation through hole 610B and the second heat dissipation through hole 710B may be fan-shaped or rectangular. By arranging dense first heat dissipation through holes 610B and second heat dissipation through holes 710B, the efficiency of heat transfer to the static end heat conductor 610 and the dynamic end heat conductor 710 is higher.

[0055] In an optional embodiment, if Figure 4 As shown, the static end heat conducting member 610 is a cylinder, and the axis of the static end heat conducting member 610 coincides with the axis of the static end conductive rod 100. The first heat dissipation through holes 610B include a plurality of first heat dissipation through holes 610B, which are arranged at intervals along the circumference of the static end heat conducting member 610. Similarly, Figure 6As shown, the moving end heat conductive member 710 is a cylinder, and the axis of the moving end heat conductive member 710 coincides with the axis of the moving end conductive rod 200. The second heat dissipation through holes 710B include a plurality of them, and the plurality of second heat dissipation through holes 710B are arranged at intervals along the circumference of the moving end heat conductive member 710. By arranging the plurality of first heat dissipation through holes 610B at intervals along the circumference of the static end heat conductive member 610, and arranging the plurality of second heat dissipation through holes 710B at intervals along the circumference of the dynamic end heat conductive member 710, the contact area between the static end heat conductive member 610 and the moving end heat conductive member 710 is increased, thereby further improving the heat dissipation efficiency of the static end heat conductive member 610 and the dynamic end heat conductive member 710.

[0056] In an optional embodiment, due to the function of heat conduction of the static end heat conductor 610 and the dynamic end heat conductor 710, and to avoid attracting arcs, the static end heat conductor 610 and the dynamic end heat conductor 710 are both made of insulating heat conducting materials. Specifically, the static end heat conductor 610 and the dynamic end heat conductor 710 can be made of ceramic material, and the ceramic material can be added with materials such as graphene and carbon nanotubes to increase the heat conduction efficiency.

[0057] In an optional embodiment, if Figure 4 As shown, the static end heat sink 620 includes a plurality of first heat sink fins 621, which are arranged around the outer circumference of the static end heat conductor 610, and the extension direction of the first heat sink fins 621 is arranged along the radial direction of the static end conductive rod 100. Specifically, the first heat sink fins 621 are made of metal. By surrounding the outer circumference of the static end heat conductor 610 with a plurality of first heat sink fins 621, heat is transferred from the static end heat conductor 610 to the first heat sink fins 621, and the first heat sink fins 621 exchange heat with the surrounding air, and also radiate heat to the surrounding space in the form of thermal radiation, thereby reducing the temperature of the vacuum interrupter. Since there are a plurality of first heat sink fins 621, the static end heat sink 620 has a large heat dissipation area and has the advantage of high heat dissipation efficiency.

[0058] Similarly, if Figure 5 As shown, the moving end heat sink 720 includes a plurality of second heat sink fins 721, which are arranged around the outer circumference of the moving end heat conductor 710, and the extension direction of the second heat sink fins 721 is arranged along the radial direction of the moving end conductive rod 200. Specifically, the second heat sink fins 721 are made of metal. By arranging the plurality of second heat sink fins 721 around the outer circumference of the moving end heat conductor 710, heat is transferred from the moving end heat conductor 710 to the second heat sink fins 721, and the second heat sink fins 721 exchange heat with the surrounding air, and also radiate heat to the surrounding space in the form of thermal radiation, thereby reducing the temperature of the vacuum interrupter. Since there are a plurality of second heat sink fins 721, the moving end heat sink 720 has a large heat dissipation area and has the advantage of high heat dissipation efficiency.

[0059] In an exemplary embodiment, in order to ensure the heat dissipation efficiency of the static end heat sink 620, the number of the first heat dissipation gratings 621 is greater than 20, and the length of the first heat dissipation gratings 621 in the radial direction of the static end conductive rod 100 is greater than 3 cm. In order to ensure the heat dissipation efficiency of the static end heat sink 620, the number of the second heat dissipation gratings 721 is greater than 20, and the length of the second heat dissipation gratings 721 in the radial direction of the dynamic end conductive rod 200 is greater than 3 cm.

[0060] In an optional embodiment, if Figure 4 and Figure 6 As shown, both the static end shielding cover 630 and the dynamic end shielding cover 730 are in a drum-shaped cylinder shape. By setting the static end shielding cover 630 and the dynamic end shielding cover 730 in a drum-shaped cylinder shape, that is, the outer side surface is a convex arc surface, the static end shielding cover 630 and the dynamic end shielding cover 730 can optimize the electric field distribution of the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 without affecting their heat dissipation conditions as much as possible.

[0061] In an optional embodiment, the static end contact 110 may be a flat contact, a longitudinal magnetic field contact, or a transverse magnetic field contact. Similarly, the movable end contact 210 may be a flat contact, a longitudinal magnetic field contact, or a transverse magnetic field contact. Different static end contacts 110 and movable end contacts 210 may be selected according to the current and voltage carried by the vacuum interrupter, which has the advantage of good applicability.

[0062] On the other hand, an embodiment of the present application further provides a vacuum switch, which includes the vacuum interrupter described in any of the above embodiments, as well as a static support, a conductive clip, a flexible connection and a dynamic support. The static end conductive rod 100 of the vacuum interrupter is connected to the static support, and the dynamic end conductive rod 200 is connected to the dynamic support through a conductive clip and a flexible connection. The current in the vacuum switch flows through the vacuum interrupter, and the interior of the vacuum interrupter is a vacuum environment. The circuit is opened or closed by controlling the connection state of the static end contact 110 and the dynamic end contact 210. When the static end contact 110 and the dynamic end contact 210 are closed, the current can flow and the circuit is in a closed state; when the static end contact 110 and the dynamic end contact 210 are separated, the current is blocked and the circuit is in an open state.

[0063] The vacuum switch described in the embodiment of the present application arranges the static end contact 110 and the dynamic end contact 210 of the vacuum arc chamber into the shielding cavity 300, and arranges the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 at both ends of the shielding cavity 300, so that the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700 transfer and discharge the heat in the first cavity 300A, thereby avoiding excessive temperature in the vacuum arc chamber, improving the rated current carrying capacity of the vacuum switch, and increasing the life of the vacuum switch, and has the advantages of high heat dissipation effect and good stability in use.

[0064] The vacuum interrupter and vacuum switch described in the embodiments of the present application have the following beneficial effects:

[0065] 1. By arranging the static end contact 110 and the moving end contact 210 in the shielding cavity 300, and arranging the static end heat dissipation mechanism 600 and the moving end heat dissipation mechanism 700 at both ends of the shielding cavity 300, the static end heat dissipation mechanism 600 and the moving end heat dissipation mechanism 700 transfer and discharge the heat in the first chamber 300A, thereby avoiding the temperature in the vacuum interrupter being too high, improving the rated current carrying capacity, and increasing the life of the vacuum switch, which has the advantages of high heat dissipation effect and good use stability.

[0066] 2. By setting a first heat dissipation through hole 610B on the static end heat conductive member 610 and a second heat dissipation through hole 710B on the dynamic end heat conductive member 710, the first chamber 300A and the second chamber 400A of the static end housing 400 are connected, and the first chamber 300A and the third chamber 500A of the dynamic end housing 500 are connected, thereby increasing the contact area between the static end heat conductive member 610 and the dynamic end heat conductive member 710 and the heat, and improving the heat dissipation efficiency of the static end heat dissipation mechanism 600 and the dynamic end heat dissipation mechanism 700.

[0067] 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.

[0068] 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 static end conductive rod (100) and a dynamic end conductive rod (200), wherein one end of the static end conductive rod (100) is provided with a static end contact (110), and one end of the dynamic end conductive rod (200) is provided with a dynamic end contact (210), and the static end contact (110) and the dynamic end contact (210) are arranged opposite to each other; A shielding cavity (300), the shielding cavity (300) being provided with a first cavity (300A), two ends of the shielding cavity (300) being provided with a first opening (300B) and a second opening (300C), the static end contact (110) being arranged in the first cavity (300A) through the first opening (300B), and the dynamic end contact (210) being arranged in the first cavity (300A) through the second opening (300C); A static end housing (400) and a dynamic end housing (500), wherein the static end housing (400) is sleeved on the outside of the static end conductive rod (100), and the dynamic end housing (500) is sleeved on the outside of the dynamic end conductive rod (200); a static end heat dissipation mechanism (600), the static end heat dissipation mechanism (600) being sleeved on the outside of the static end conductive rod (100), and the static end heat dissipation mechanism (600) being arranged between the static end shell (400) and the shielding cavity (300), one end cover of the static end heat dissipation mechanism (600) being arranged on the first opening (300B), and the other end of the static end heat dissipation mechanism (600) being connected to the static end shell (400); as well as A moving end heat dissipation mechanism (700), wherein the moving end heat dissipation mechanism (700) is sleeved on the outside of the moving end conductive rod (200), and the moving end heat dissipation mechanism (700) is arranged between the moving end shell (500) and the shielding cavity (300), one end cover of the moving end heat dissipation mechanism (700) is arranged on the second opening (300C), and the other end of the moving end heat dissipation mechanism (700) is connected to the moving end shell (500).

2. The vacuum interrupter according to claim 1, characterized in that: The static end heat dissipation mechanism (600) comprises a static end heat conductive member (610), a static end heat sink (620) and a static end shielding cover (630); the static end heat conductive member (610) is provided with a first connecting through hole (610A); the static end conductive rod (100) is movably arranged in the first connecting through hole (610A); one end of the static end heat conductive member (610) is connected to one end of the shielding cavity (300); the other end of the static end heat conductive member (610) is connected to the static end housing (400); the static end heat sink (620) is arranged around the outer peripheral surface of the static end heat conductive member (610); and the static end shielding cover (630) wraps the outer side surface of the static end heat sink (620); The moving end heat dissipation mechanism (700) comprises a moving end heat conductive member (710), a moving end heat sink (720) and a moving end shielding cover (730); the moving end heat conductive member (710) is provided with a second connecting through hole (710A); the moving end conductive rod (200) is movably arranged in the second connecting through hole (710A); one end of the moving end heat conductive member (710) is connected to the other end of the shielding cavity (300); the other end of the moving end heat conductive member (710) is connected to the moving end housing (500); the moving end heat sink (720) is arranged around the outer peripheral surface of the moving end heat conductive member (710); and the moving end shielding cover (730) wraps the outer side surface of the moving end heat sink (720).

3. The vacuum interrupter according to claim 2, characterized in that: The static end housing (400) is provided with a second chamber (400A), and the static end heat conducting member (610) is provided with a first heat dissipation through hole (610B), wherein the first heat dissipation through hole (610B) is connected with the first chamber (300A) and the second chamber (400A); The movable end housing (500) is provided with a third chamber (500A), and the movable end heat conducting member (710) is provided with a second heat dissipation through hole (710B), wherein the second heat dissipation through hole (710B) is connected to the first chamber (300A) and the third chamber (500A).

4. The vacuum interrupter according to claim 3, characterized in that: The static end heat conducting component (610) is a cylinder, the first heat dissipation through holes (610B) include a plurality of first heat dissipation through holes (610B), and the plurality of first heat dissipation through holes (610B) are arranged at intervals along the circumference of the static end heat conducting component (610); The moving end heat conducting member (710) is a cylinder, and the second heat dissipation through holes (710B) include a plurality of them, and the plurality of second heat dissipation through holes (710B) are arranged at intervals along the circumference of the moving end heat conducting member (710).

5. The vacuum interrupter according to claim 2, characterized in that: The static end heat conducting component (610) and the dynamic end heat conducting component (710) are both made of insulating heat conducting materials.

6. The vacuum interrupter according to claim 2, characterized in that: The static end heat sink (620) comprises a plurality of first heat sink gratings (621), the plurality of first heat sink gratings (621) being arranged around the outer peripheral surface of the static end heat conducting member (610), and the extension direction of the first heat sink gratings (621) being arranged along the radial direction of the static end conductive rod (100); The moving end heat sink (720) comprises a plurality of second heat sink gratings (721), the plurality of second heat sink gratings (721) being arranged around the outer peripheral surface of the moving end heat conducting member (710), and the extension direction of the second heat sink gratings (721) being arranged along the radial direction of the moving end conductive rod (200).

7. The vacuum interrupter according to claim 6, characterized in that: The number of the first heat dissipation gratings (621) is greater than 20, and the length of the first heat dissipation gratings (621) in the radial direction of the static end conductive rod (100) is greater than 3 cm; The number of the second heat dissipation gratings (721) is greater than 20, and the length of the second heat dissipation gratings (721) in the radial direction of the moving end conductive rod (200) is greater than 3 cm.

8. The vacuum interrupter according to claim 2, characterized in that: The static end shielding cover (630) and the dynamic end shielding cover (730) are both in the shape of drum cylinders.

9. The vacuum interrupter according to claim 1, characterized in that: The static end contact (110) is a flat-plate contact, a longitudinal magnetic field contact or a transverse magnetic field contact; the movable end contact (210) is a flat-plate contact, a longitudinal magnetic field contact or a transverse magnetic field contact.

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

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