Vacuum circuit breaker

Abstract

The invention relates to a vacuum circuit breaker. The vacuum circuit breaker comprises a tank body, a vacuum arc extinguish chamber, a flow guide mechanism and a heat conduction mechanism, and the tank body is provided with a first cavity. The vacuum arc-extinguishing chamber is arranged in the first cavity, the vacuum arc-extinguishing chamber comprises a shell, a static end conducting rod and a movable end conducting rod, the static end conducting rod is arranged at one end of the shell, and the movable end conducting rod is movably arranged at the other end of the shell. The flow guide mechanism comprises a static end flow guide piece and a movable end flow guide piece, the static end flow guide piece is connected to the static end conducting rod, and the movable end flow guide piece is connected to the movable end conducting rod. The heat conduction mechanism comprises a static end heat conduction part and a movable end heat conduction part, the static end heat conduction part is arranged between the static end flow guide part and the tank body and is in heat transfer connection with the tank body, and the movable end heat conduction part is arranged between the movable end flow guide part and the tank body and is in heat transfer connection with the tank body. The vacuum circuit breaker has the advantages of being good in heat dissipation effect and good in stability.

Description

Technical Field

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

[0002] With the rapid development and application of vacuum circuit breakers in high voltage equipment, the requirements for the insulation performance and current carrying capacity of vacuum circuit breakers are getting higher and higher. Especially in the application of tank vacuum circuit breakers, this demand is more obvious. The tank vacuum circuit breaker includes a tank body and a vacuum interrupter, and the vacuum interrupter is arranged in the tank body.

[0003] In order to enhance the insulation of the vacuum interrupter, the two ends of the vacuum interrupter are connected to the tank body through an insulating support structure. However, although such a design enhances the insulation to a certain extent, it also limits the transfer of heat generated by the vacuum interrupter to the surrounding environment. Since the heat cannot be effectively transferred from the vacuum interrupter to the tank body, the heat dissipation problem of the vacuum circuit breaker is aggravated, resulting in the performance of the vacuum circuit breaker being limited, with the defects of poor heat dissipation effect and poor stability. Summary of the invention

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

[0005] A vacuum circuit breaker, comprising:

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

[0007] A vacuum interrupter, wherein the vacuum interrupter is arranged in the first chamber, and the vacuum interrupter comprises a shell, a static end conductive rod and a dynamic end conductive rod, wherein the static end conductive rod is arranged at one end of the shell, and the dynamic end conductive rod is movably arranged at the other end of the shell, and the dynamic end conductive rod can be movably connected to or disconnected from the static end conductive rod;

[0008] A flow guide mechanism, the flow guide mechanism is arranged in the first chamber, the flow guide mechanism comprises a static end flow guide member and a dynamic end flow guide member, the static end flow guide member is connected to the static end conductive rod, and the dynamic end flow guide member is connected to the dynamic end conductive rod; and

[0009] A heat-conducting mechanism is arranged in the first chamber, and the heat-conducting mechanism includes a static end heat-conducting part and a dynamic end heat-conducting part, one end of the static end heat-conducting part is connected to the static end flow guide part, and the other end of the static end heat-conducting part is connected to the tank body, one end of the dynamic end heat-conducting part is connected to the dynamic end flow guide part, and the other end of the dynamic end heat-conducting part is connected to the tank body.

[0010] In one embodiment, the static end heat conducting element comprises a static end heat conducting pipe and a first heat conducting component, and the first heat conducting component is encapsulated inside the static end heat conducting pipe;

[0011] The moving end heat conducting member comprises a moving end heat conducting pipe and a second heat transfer component, and the second heat transfer component is encapsulated inside the moving end heat conducting pipe.

[0012] In one embodiment, the first heat transfer component is in the shape of a sphere or a capsule; the second heat transfer component is in the shape of a sphere or a capsule.

[0013] In one embodiment, when the first heat transfer component or the second heat transfer component is a capsule body, the height of the first heat transfer component is 5% to 90% of the height of the static end heat conduction pipe, and the height of the second heat transfer component is 5% to 90% of the height of the dynamic end heat conduction pipe; or

[0014] When the first heat transfer component or the second heat transfer component is a sphere, the diameter of the first heat transfer component is 20% to 90% of the wall thickness of the static end heat pipe, and the diameter of the second heat transfer component is 20% to 90% of the wall thickness of the dynamic end heat pipe.

[0015] In one embodiment, the first heat transfer component includes a plurality of first heat transfer components, and the plurality of first heat transfer components are evenly arranged and distributed inside the static end heat transfer pipe along the circumference of the static end heat transfer pipe;

[0016] The second heat transfer components include a plurality of second heat transfer components, and the plurality of second heat transfer components are evenly arranged and distributed inside the moving end heat transfer pipe along the circumferential direction of the moving end heat transfer pipe.

[0017] In one embodiment, the first heat transfer component and the second heat transfer component are both made of non-metallic insulating materials.

[0018] In one embodiment, a second chamber is disposed inside the first heat transfer component, and the second chamber is in a vacuum state.

[0019] In one embodiment, a heat transfer fluid is disposed in the second chamber.

[0020] In one embodiment, the shell is provided with a third chamber, and a static end opening and a dynamic end opening are respectively provided at both ends of the shell, and the static end opening and the dynamic end opening are both connected to the third chamber, 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, the static end contact extends into the third chamber from the static end opening, and the dynamic end contact is arranged so as to extend into the third chamber through the dynamic end opening, the static end contact and the dynamic end contact are relatively arranged in the third chamber, and the shell also includes a static end cover plate and a dynamic end cover plate, the static end cover plate is covered on the static end opening, and the dynamic end cover plate is covered on the dynamic end opening.

[0021] In one embodiment, the vacuum circuit breaker further includes a static end conductive clip and a dynamic end conductive clip, the tank body is provided with a static end connecting port and a dynamic end connecting port, the static end conductive clip extends into the first chamber from the static end connecting port, the static end conductive clip is connected to the static end conductive rod, the dynamic end conductive clip extends into the first chamber from the dynamic end connecting port, and the dynamic end conductive clip is connected to the dynamic end conductive rod.

[0022] The vacuum circuit breaker is provided with a vacuum interrupter in the tank body, so that the static end conductive rod and the dynamic end conductive rod of the vacuum interrupter are provided in the shell, and the dynamic end conductive rod is movably provided so that the dynamic end conductive rod contacts or disconnects the static end conductive rod, and the arc generated by the dynamic end conductive rod when disconnected can be insulated in the shell. In order to fix the vacuum interrupter in the tank body, the static end conductive rod is connected through the static end guide of the guide mechanism, a static end heat conductive member is provided between the static end guide and one end face of the tank body, and the dynamic end conductive rod is connected through the dynamic end guide, and a dynamic end heat conductive member is provided between the dynamic end guide and the other end face of the tank body. The static end flow guide is used to transfer the heat of the static end conductive rod to the static end heat conductive part, so that the static end heat conductive part absorbs the heat and then conducts it to the tank body for heat dissipation. Similarly, the dynamic end flow guide is used to transfer the heat of the dynamic end conductive rod to the dynamic end heat conductive part, so that the dynamic end heat conductive part absorbs the heat and then conducts it to the tank body for heat dissipation, thereby improving the heat dissipation capacity of the vacuum circuit breaker and maintaining good insulation performance to avoid heat affecting the performance of the vacuum circuit breaker. It has the advantages of good heat dissipation effect and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the vacuum circuit breaker described in an embodiment of the present application.

[0024] Figure 2 This is a schematic diagram of the structure of the static end heat conductor of the vacuum circuit breaker described in an embodiment of the present application.

[0025] Figure 3 This is a schematic cross-sectional structure diagram of the static end heat conductor of the vacuum circuit breaker described in an embodiment of the present application.

[0026] Figure 4 This is a schematic cross-sectional structural diagram of the first heat transfer component of the vacuum circuit breaker described in an embodiment of the present application.

[0027] Figure 5 This is a schematic diagram of the structure of the moving end heat conductor of the vacuum circuit breaker described in an embodiment of the present application.

[0028] Figure 6 This is a schematic cross-sectional structural diagram of the moving end heat conductor of the vacuum circuit breaker described in an embodiment of the present application.

[0029] Figure 7 This is a schematic cross-sectional structural diagram of the second heat transfer component of the vacuum circuit breaker described in an embodiment of the present application.

[0030] Figure 8 It is a perspective schematic diagram of the static end heat conductor of the vacuum circuit breaker described in the embodiment of the present application.

[0031] Figure Number:

[0032] 100, tank body; 100A, first chamber; 100B, static end connection port; 100C, dynamic end connection port;

[0033] 200, vacuum interrupter; 210, housing; 210A, third chamber; 211, static end cover plate; 212, dynamic end cover plate; 220, static end conductive rod; 221, static end contact; 230, dynamic end conductive rod; 231, dynamic end contact;

[0034] 300, flow guide mechanism; 310, static end flow guide piece; 320, dynamic end flow guide piece;

[0035] 400, heat transfer mechanism; 410, static end heat transfer member; 411, static end heat transfer pipe; 412, first heat transfer member; 412A, second chamber; 420, dynamic end heat transfer member; 421, dynamic end heat transfer pipe; 422, second heat transfer member;

[0036] 510, static end conductive clip; 520, dynamic end conductive clip. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] See also Figure 1 , shows a schematic diagram of the structure of a vacuum circuit breaker in an embodiment of the present application, the vacuum circuit breaker includes a tank body 100, a vacuum interrupter 200, a flow guide mechanism 300 and a heat conduction mechanism 400, and the tank body 100 is provided with a first chamber 100A. The vacuum interrupter 200 is arranged in the first chamber 100A, and the vacuum interrupter 200 includes a housing 210, a static end conductive rod 220 and a dynamic end conductive rod 230, the static end conductive rod 220 is arranged at one end of the housing 210, and the dynamic end conductive rod 230 is movably arranged at the other end of the housing 210, so that the dynamic end conductive rod 230 can be connected or disconnected with the static end conductive rod 220.

[0044] The flow guide mechanism 300 is arranged in the first chamber 100A, and the flow guide mechanism 300 includes a static end flow guide 310 and a dynamic end flow guide 320. The static end flow guide 310 is connected to the static end conductive rod 220, and the dynamic end flow guide 320 is connected to the dynamic end conductive rod 230. In addition to guiding the internal air, the static end flow guide 310 and the dynamic end flow guide 320 are also used for insulating and supporting the two ends of the vacuum arc chamber 200.

[0045] The heat conducting mechanism 400 is arranged in the first chamber 100A, and the heat conducting mechanism 400 includes a static end heat conducting member 410 and a dynamic end heat conducting member 420. One end of the static end heat conducting member 410 is connected to the static end flow guide member 310, and the other end of the static end heat conducting member 410 is connected to one end surface of the tank body 100. One end of the dynamic end heat conducting member 420 is connected to the dynamic end flow guide member 320, and the other end of the dynamic end heat conducting member 420 is heat-conductingly connected to the other end surface of the tank body 100. The static end heat conducting member 410 is used to insulate and support the static end flow guide member 310 and conduct heat from the static end heat conducting member 410 to the tank body 100, and the dynamic end heat conducting member 420 is used to insulate and support the dynamic end flow guide member 320 and conduct heat to the tank body 100.

[0046] In an exemplary embodiment, the housing 210 is a ceramic housing, and the housing 210 is a vacuum-sealed housing, and the ceramic housing has good insulation. When the static end conductive rod 220 and the dynamic end conductive rod 230 are disconnected, an arc will be generated between the static end conductive rod 220 and the dynamic end conductive rod 230, but the arc will be quickly extinguished under the action of the vacuum environment and the ceramic housing, thereby disconnecting the circuit and ensuring the functional stability of the vacuum circuit breaker.

[0047] Furthermore, the static end flow guide 310, the dynamic end flow guide 320, the static end heat conductor 410 and the dynamic end heat conductor 420 are made of non-metallic insulating materials, thereby enhancing the insulation of the vacuum interrupter 200 and ensuring the stability of the vacuum circuit breaker when disconnected.

[0048] The vacuum circuit breaker described in the embodiment of the present application is provided with a vacuum interrupter 200 in the tank body 100, so that the static end conductive rod 220 and the dynamic end conductive rod 230 of the vacuum interrupter 200 are relatively arranged in the housing 210, and the opening and closing of the vacuum circuit breaker is realized by controlling the dynamic end conductive rod 230 to movably contact and disconnect the static end conductive rod 220, and the arc generated when the static end conductive rod 220 and the dynamic end conductive rod 230 are disconnected can be insulated in the housing 210. In order to fix the vacuum interrupter in the tank body 100, the static end conductive rod 220 is connected through the static end flow guide 310 of the flow guide mechanism 300, and the static end heat conductive member 410 is arranged between the static end flow guide 310 and one end surface of the tank body 100. Similarly, the dynamic end flow guide 320 is connected to the dynamic end conductive rod 230, and the dynamic end heat conductive member 420 is arranged between the dynamic end flow guide 320 and the other end surface of the tank body 100.

[0049] In an optional embodiment, the interior of the first chamber 100A is filled with a gaseous insulating medium, which may be clean air, nitrogen, carbon dioxide, or a mixture of C4F7N and carbon dioxide, etc. The function of the gaseous insulating medium is to enhance the insulation performance of the vacuum circuit breaker, prevent the arc from reigniting and external impurities from entering when disconnecting, and improve the stability of the vacuum circuit breaker.

[0050] In the vacuum circuit breaker described in the embodiment of the present application, the static end flow guide 310 can be used to transfer the heat of the static end conductive rod 220 to the static end heat conductive member 410. The static end flow guide 310 can also transfer the heat to the internal gaseous insulating medium, and then guide the gaseous insulating medium into the static end heat conductive member 410, so that the static end heat conductive member 410 quickly absorbs the heat and then conducts it to one end surface of the tank body 100 for heat dissipation. Similarly, the dynamic end flow guide 320 can transfer the heat of the dynamic end conductive rod 230 to the dynamic end heat conductive member 420. The dynamic end flow guide 320 can also transfer the heat to the internal gaseous insulating medium, and then guide the gaseous insulating medium into the dynamic end heat conductive member 420, so that the dynamic end heat conductive member 420 quickly absorbs the heat and then conducts it to the other end surface of the tank body 100 for heat dissipation, thereby improving the heat dissipation capacity of the vacuum circuit breaker, maintaining good insulation performance, avoiding heat accumulation affecting the performance of the vacuum circuit breaker, and having the advantages of good heat dissipation effect and good stability.

[0051] In an optional embodiment, the tank body 100 is made of metal material, and the tank body 100 can play a protective and shielding role when the vacuum circuit breaker is working. The metal tank body 100 makes the tank type vacuum circuit breaker have higher mechanical strength and protection performance, can adapt to more harsh working environment, and improve reliability.

[0052] Combination Figures 2 to 3 , shows a schematic diagram of the structure of the static end heat conducting member 410 of the vacuum circuit breaker in an embodiment of the present application. In some embodiments, the static end heat conducting member 410 includes a static end heat conducting pipe 411 and a first heat transfer component 412, and the first heat transfer component 412 is encapsulated inside the static end heat conducting pipe 411. Similarly, Figure 5 and Figure 6 As shown, the moving end heat conducting member 420 includes a moving end heat conducting pipe 421 and a second heat conducting component 422 , and the second heat conducting component 422 is packaged inside the moving end heat conducting pipe 421 .

[0053] The static end heat pipe 411 and the dynamic end heat pipe 421 of this embodiment are tubular structures. The static end flow guide 310 and the dynamic end flow guide 320 transfer heat to the pipes of the static end heat pipe 411 and the dynamic end heat pipe 421 through the medium respectively. Then, the first heat transfer component 412 and the second heat transfer component 422 can quickly absorb the heat in the pipes, thereby improving the overall thermal conductivity of the static end heat conductor 410 and the dynamic end heat conductor 420, increasing the heat transfer and heat dissipation path from the tank type vacuum circuit breaker to the tank body 100, reducing the temperature rise of the key position of the vacuum interrupter 200, and improving the rated current capacity.

[0054] In an optional embodiment, if Figure 3 As shown, the first heat transfer component 412 is in the shape of a sphere or a capsule. Figure 6 As shown, the shape of the second heat transfer component 422 is a sphere or a capsule. By setting the first heat transfer component 412 as a sphere or a capsule, and the second heat transfer component 422 as a sphere or a capsule, the shape of the sphere or the capsule is regular and symmetrical, and the heat is distributed relatively evenly inside and on the surface thereof. When heat is transmitted from one point, it can diffuse to the entire sphere or the capsule in a relatively uniform manner, so that the overall temperature rise of the first heat transfer component 412 and the second heat transfer component 422 is relatively uniform, thereby improving the efficiency of heat conduction. Compared with other shapes such as a cuboid, a sphere and a capsule can more effectively utilize the surface area during the heat conduction process, thereby achieving efficient heat transfer. Moreover, the molding process of the sphere or the capsule is simple, and it is also convenient to integrate it into the interior of the static end heat pipe 411 and the dynamic end heat pipe 421.

[0055] In some embodiments, when the first heat transfer component 412 or the second heat transfer component 422 is a capsule body, the height of the first heat transfer component 412 is 5% to 90% of the height of the static end heat conduction pipe 411, and the height of the second heat transfer component 422 is 5% to 90% of the height of the dynamic end heat conduction pipe 421. By limiting the height relationship between the first heat transfer component 412 and the static end heat conduction pipe 411, and the second heat transfer component 422 and the dynamic end heat conduction pipe 421 in the shape of a capsule body, the first heat transfer component 412 or the second heat transfer component 422 has a reasonable surface area to volume ratio under a given volume, and a larger surface area is conducive to the absorption and dissipation of heat, and can transfer heat to the surrounding environment or other media more quickly.

[0056] In other embodiments, when the first heat transfer component 412 or the second heat transfer component 422 is a sphere, the diameter of the first heat transfer component 412 is 20% to 90% of the wall thickness of the static end heat conduction pipe 411, and the diameter of the second heat transfer component 422 is 20% to 90% of the wall thickness of the dynamic end heat conduction pipe 421. Similarly, by limiting the thickness relationship between the first heat transfer component 412 and the static end heat conduction pipe 411, and the second heat transfer component 422 and the dynamic end heat conduction pipe 421 in the shape of a sphere, the first heat transfer component 412 or the second heat transfer component 422 has a reasonable surface area to volume ratio under a given volume, and a larger surface area is conducive to the absorption and dissipation of heat, and can transfer heat to the surrounding environment or other media more quickly.

[0057] In an optional embodiment, if Figure 8 As shown, the first heat transfer component 412 includes a plurality of first heat transfer components 412, which are evenly arranged and distributed inside the static end heat conduction pipe 411 along the circumferential direction of the static end heat conduction pipe 411. The first heat transfer component 412 can achieve a rapid temperature rise effect, and by evenly encapsulating the first heat transfer component 412 inside the static end heat conduction pipe 411, the overall temperature of the static end heat conduction pipe 411 rises more evenly, thereby improving the efficiency of heat conduction.

[0058] Similarly, the second heat transfer component 422 includes a plurality of second heat transfer components 422, which are evenly arranged and distributed inside the moving end heat conduction pipe 421 along the circumferential direction of the moving end heat conduction pipe 421. The second heat transfer component 422 can achieve a rapid temperature rise effect, and by evenly encapsulating the second heat transfer component 422 inside the moving end heat conduction pipe 421, the overall temperature of the moving end heat conduction pipe 421 rises more evenly, thereby improving the efficiency of heat conduction.

[0059] In an exemplary embodiment, Figure 8As shown, a plurality of first heat transfer components 412 are equidistantly distributed in an axisymmetric annular shape in the static end heat conduction pipe 411 along the circumferential direction to form a first array, and a plurality of the first arrays are arranged along the length direction of the static end heat conduction pipe 411. A plurality of second heat transfer components 422 are equidistantly distributed in an axisymmetric annular shape in the dynamic end heat conduction pipe 421 along the circumferential direction to form a second array, and a plurality of the second arrays are arranged along the length direction of the dynamic end heat conduction pipe 421.

[0060] In some optional embodiments, such as Figure 4 and Figure 7 As shown, the materials of the first heat transfer component 412 and the second heat transfer component 422 are both non-metallic insulating materials, and the first heat transfer component 412 and the second heat transfer component 422 are solid structures. In order not to affect the insulation withstand voltage and electric field distribution characteristics of the static end heat conductor 410 and the dynamic end heat conductor 420, the high thermal conductivity materials of the first heat transfer component 412 and the second heat transfer component 422 are both non-metallic insulating materials.

[0061] In other embodiments, Figure 4 As shown, the first heat transfer component 412 is provided with a second chamber 412A inside, and the second chamber 412A is in a vacuum state. That is, the first heat transfer component 412 can also be set as a vacuum cavity. By setting the first heat transfer component 412 as a vacuum cavity, the heat conduction of gaseous molecules is reduced. Since there are almost no gas molecules in a vacuum environment, the loss of heat through gas conduction is greatly reduced, thereby improving the thermal insulation performance and heat transfer efficiency of the first heat transfer component 412.

[0062] Furthermore, a heat transfer liquid may be provided in the second chamber 412A, and by providing the heat transfer liquid in the second chamber 412A, the heat transfer effect of the first heat transfer component 412 is improved. Moreover, in a vacuum state, the boiling point of the heat transfer liquid is significantly reduced, making it easier to vaporize at a lower temperature, thereby enhancing the startup performance and thermal response speed of the first heat transfer component 412.

[0063] In an optional embodiment, if Figure 1As shown, the housing 210 is provided with a third chamber 210A, and the third chamber 210A is in a vacuum state. The housing 210 is provided with a static end opening and a dynamic end opening at both ends, and both the static end opening and the dynamic end opening are connected to the third chamber 210A. A static end contact 221 is provided at one end of the static end conductive rod 220, and a dynamic end contact 231 is provided at one end of the dynamic end conductive rod 230. The static end contact 221 extends into the third chamber 210A from the static end opening, and the dynamic end contact 231 extends into the third chamber 210A from the dynamic end opening. The static end contact 221 and the dynamic end contact 231 are arranged relatively in the third chamber 210A. The housing 210 also includes a static end cover plate 211 and a dynamic end cover plate 212. The static end cover plate 211 is covered on the static end opening, and the dynamic end cover plate 212 is covered on the dynamic end opening. By setting a vacuum-sealed third chamber 210A in the shell 210, the static end contact 221 of the static end conductive rod 220 and the moving end contact 231 of the moving end conductive rod 230 are relatively arranged in the third chamber 210A. When the static end contact 221 and the moving end contact 231 are disconnected, an arc is generated. The vacuum environment and the insulating material of the shell 210 can suppress the generation of the arc, thereby achieving the disconnection function of the vacuum circuit breaker.

[0064] In an optional embodiment, if Figure 1 As shown, the vacuum circuit breaker further includes a static end conductive clip 510 and a dynamic end conductive clip 520, the tank body 100 is provided with a static end connection port 100B and a dynamic end connection port 100C, the static end conductive clip 510 extends into the first chamber 100A from the static end connection port 100B, the static end conductive clip 510 is connected to the static end conductive rod 220, the dynamic end conductive clip 520 extends into the first chamber 100A from the dynamic end connection port 100C, and the dynamic end conductive clip 520 is connected to the dynamic end conductive rod 230. The input circuit is connected to the static end conductive rod 220 by the static end conductive clip 510, and the output circuit is connected to the dynamic end conductive rod 230 by the dynamic end conductive clip 520, so that the vacuum circuit breaker is connected to the external circuit, and plays a role of high voltage circuit breaker.

[0065] The vacuum circuit breaker described in the embodiment of the present application has the following beneficial effects:

[0066] 1. The static end flow guide 310 can be used to transfer the heat of the static end conductive rod 220 to the static end heat conductive member 410 via a medium, so that the static end heat conductive member 410 quickly absorbs the heat and then conducts it to one end surface of the tank body 100 for heat dissipation. Similarly, the dynamic end flow guide 320 can transfer the heat of the dynamic end conductive rod 230 to the dynamic end heat conductive member 420 via a medium, so that the dynamic end heat conductive member 420 quickly absorbs the heat and then conducts it to the other end surface of the tank body 100 for heat dissipation, thereby improving the heat dissipation capacity of the vacuum circuit breaker, maintaining good insulation performance, avoiding heat accumulation from affecting the performance of the vacuum circuit breaker, and having the advantages of good heat dissipation effect and good stability.

[0067] 2. The first heat transfer component 412 and the second heat transfer component 422 can quickly absorb the heat in the pipeline, thereby improving the overall thermal conductivity of the static end heat conductor 410 and the dynamic end heat conductor 420, increasing the heat transfer and heat dissipation path from the tank type vacuum circuit breaker to the tank body 100, reducing the temperature rise at the key position of the vacuum interrupter 200, and improving the rated current capacity.

[0068] 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.

[0069] 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 circuit breaker, characterized in that: include: A tank body (100), wherein the tank body (100) is provided with a first chamber (100A); A vacuum interrupter (200), the vacuum interrupter (200) being arranged in the first chamber (100A), the vacuum interrupter (200) comprising a housing (210), a static end conductive rod (220) and a dynamic end conductive rod (230), the static end conductive rod (220) being arranged at one end of the housing (210), the dynamic end conductive rod (230) being movably arranged at the other end of the housing (210), and the dynamic end conductive rod (230) being capable of being connected to or disconnected from the static end conductive rod (220); a flow guiding mechanism (300), the flow guiding mechanism (300) being arranged in the first chamber (100A), the flow guiding mechanism (300) comprising a static end flow guiding piece (310) and a dynamic end flow guiding piece (320), the static end flow guiding piece (310) being connected to the static end conductive rod (220), and the dynamic end flow guiding piece (320) being connected to the dynamic end conductive rod (230); as well as A heat conducting mechanism (400), the heat conducting mechanism (400) being arranged in the first chamber (100A), the heat conducting mechanism (400) comprising a static end heat conducting member (410) and a dynamic end heat conducting member (420), one end of the static end heat conducting member (410) being connected to the static end flow guiding member (310), the other end of the static end heat conducting member (410) being heat transfer connected to the tank body (100), one end of the dynamic end heat conducting member (420) being connected to the dynamic end flow guiding member (320), the other end of the dynamic end heat conducting member (420) being heat transfer connected to the tank body (100).

2. The vacuum circuit breaker according to claim 1, characterized in that: The static end heat conducting element (410) comprises a static end heat conducting pipe (411) and a first heat transfer component (412), wherein the first heat transfer component (412) is encapsulated inside the static end heat conducting pipe (411); The moving end heat conducting element (420) comprises a moving end heat conducting pipe (421) and a second heat transfer component (422), wherein the second heat transfer component (422) is encapsulated inside the moving end heat conducting pipe (421).

3. The vacuum circuit breaker according to claim 2, characterized in that: The first heat transfer component (412) is in the shape of a sphere or a capsule; the second heat transfer component (422) is in the shape of a sphere or a capsule.

4. The vacuum circuit breaker according to claim 3, characterized in that: When the first heat transfer component (412) or the second heat transfer component (422) is a capsule body, the height of the first heat transfer component (412) is 5% to 90% of the height of the static end heat conduction pipe (411), and the height of the second heat transfer component (422) is 5% to 90% of the height of the dynamic end heat conduction pipe (421); or When the first heat transfer component (412) or the second heat transfer component (422) is a sphere, the diameter of the first heat transfer component (412) is 20% to 90% of the wall thickness of the static end heat conduction pipe (411), and the diameter of the second heat transfer component (422) is 20% to 90% of the wall thickness of the dynamic end heat conduction pipe (421).

5. The vacuum circuit breaker according to claim 2, characterized in that: The first heat transfer component (412) comprises a plurality of first heat transfer components (412), and the plurality of first heat transfer components (412) are evenly arranged and distributed inside the static end heat conduction pipe (411) along the circumference of the static end heat conduction pipe (411); The second heat transfer component (422) comprises a plurality of second heat transfer components (422), and the plurality of second heat transfer components (422) are evenly arranged and distributed inside the moving end heat conduction pipe (421) along the circumferential direction of the moving end heat conduction pipe (421).

6. The vacuum circuit breaker according to claim 2, characterized in that: The first heat transfer component (412) and the second heat transfer component (422) are both made of non-metallic insulating materials.

7. The vacuum circuit breaker according to claim 2, characterized in that: A second chamber (412A) is provided inside the first heat transfer component (412), and the second chamber (412A) is in a vacuum state.

8. The vacuum circuit breaker according to claim 7, characterized in that: A heat transfer fluid is provided in the second chamber (412A).

9. The vacuum circuit breaker according to claim 1, characterized in that: The shell (210) is provided with a third chamber (210A), and the two ends of the shell (210) are respectively provided with a static end opening and a dynamic end opening, and the static end opening and the dynamic end opening are both connected to the third chamber (210A), one end of the static end conductive rod (220) is provided with a static end contact (221), and one end of the dynamic end conductive rod (230) is provided with a dynamic end contact (231), and the static end contact (221) extends from the static end opening into the third chamber. (210A), the movable end contact (231) is arranged so that the movable end opening extends into the third chamber (210A), the static end contact (221) and the movable end contact (231) are arranged relatively in the third chamber (210A), and the housing (210) also includes a static end cover plate (211) and a movable end cover plate (212), the static end cover plate (211) is covered on the static end opening, and the movable end cover plate (212) is covered on the movable end opening.

10. The vacuum circuit breaker according to claim 1, characterized in that: The vacuum circuit breaker further comprises a static end conductive clip (510) and a dynamic end conductive clip (520); the tank body (100) is provided with a static end connecting port (100B) and a dynamic end connecting port (100C); the static end conductive clip (510) extends from the static end connecting port (100B) into the first chamber (100A); the static end conductive clip (510) is connected to the static end conductive rod (220); the dynamic end conductive clip (520) extends from the dynamic end connecting port (100C) into the first chamber (100A); and the dynamic end conductive clip (520) is connected to the dynamic end conductive rod (230).

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