10KV vacuum circuit breaker

Abstract

The invention provides a 10KV vacuum circuit breaker, which comprises a vacuum arc-extinguishing device, the vacuum arc-extinguishing device comprises a ceramic shell, a moving contact and a static contact, the moving contact and the static contact are positioned in the ceramic shell, the moving contact is movably connected to one end of the ceramic shell, the static contact is fixedly connected to the other end of the ceramic shell, and the ceramic shell is internally provided with a vacuum chamber; the moving contact is rotatably arranged in the ceramic shell, when the moving contact is in contact with the static contact, the moving contact rotates around a first axis, so that the moving contact and the static contact generate rotational friction, and the first axis is the central axis of the ceramic shell. According to the vacuum circuit breaker, the moving contact and the static contact are arranged to generate rotating friction, so that the moving contact and the static contact can eliminate protrusions generated by electric arcs through friction, the problem of local heating caused by the protrusions is further reduced, and the service life of the vacuum circuit breaker is prolonged.

Description

Technical Field

[0001] The invention relates to the field of vacuum circuit breakers, in particular to a 10KV vacuum circuit breaker. Background Art A vacuum circuit breaker is an electrical device specially used for opening and closing circuits in high-voltage power systems. It uses a vacuum medium to extinguish arcs and protect circuits from faults such as overloads and short circuits. When the existing traditional vacuum circuit breakers are performing the tasks of closing and closing, the current suddenly discharges in a vacuum, and an arc is generated between the contacts due to the increase in the electric field strength. The arc is a gas discharge phenomenon that can maintain the flow of current between the contacts. The arc will not only generate high temperature and strong light in a short period of time, but also erode the surface material of the contact, forming tiny protrusions. These protrusions reduce the actual contact area of ​​the contact, increase the electrical contact resistance, reduce the conduction efficiency, and further aggravate the local heating of the contact, forming a vicious cycle. Summary of the invention

[0002] Based on this, it is necessary to provide a 10KV vacuum circuit breaker to address the problem of contact damage caused by arc-formed bulges in the current 10KV vacuum circuit breaker.

[0003] The above purpose is achieved through the following technical solutions: A 10KV vacuum circuit breaker comprises: a vacuum arc extinguishing device, wherein the vacuum arc extinguishing device comprises a ceramic shell, a moving contact and a static contact, wherein the moving contact and the static contact are located inside the ceramic shell, wherein the moving contact is movably connected to one end of the ceramic shell, wherein the static contact is fixedly connected to the other end of the ceramic shell, wherein the moving contact is rotatably arranged inside the ceramic shell, wherein when the moving contact and the static contact are in contact, the moving contact rotates around a first axis, thereby causing rotational friction between the moving contact and the static contact, wherein the first axis is the central axis of the ceramic shell.

[0004] In one embodiment, the moving contact is slidable along the first axis, and the moving contact slides along the first axis, driving the moving contact to rotate around the first axis.

[0005] In one embodiment, the ceramic housing is provided with a threaded hole, the moving contact is fixedly connected with a threaded rod, the threaded hole and the threaded rod are threadedly connected, and when the threaded rod slides along the first axis, the threaded rod rotates around the first axis.

[0006] In one of the embodiments, a power-on structure is provided in the ceramic housing, and the power-on structure is used to form a magnetic field when the circuit is turned on, and the magnetic field always causes the magnetic medium between the moving contact and the static contact to move toward the moving contact.

[0007] In one of the embodiments, the moving contact is provided with an energized housing, a storage area is formed in the energized housing, and the magnetic field always causes the magnetic medium to flow toward the storage area.

[0008] In one of the embodiments, the power-on structure includes a first spring, which is disposed between the moving contact and the threaded rod, and is used to conduct current between the moving contact and the threaded rod.

[0009] In one of the embodiments, one end of the power-on spring is fixedly connected to the moving contact, and the other end of the power-on spring is fixedly connected to the threaded rod.

[0010] In one of the embodiments, when the moving contact and the stationary contact are in full contact and the circuit is turned on, any two turns of the first spring are in contact with each other.

[0011] In one embodiment, the threaded rod is provided with a push plate, and the push plate is used to compress the first spring so that any two turns of the first spring contact each other.

[0012] In one embodiment, the first spring is provided with a step structure, and the step structure is provided at the contact point between any two turns of the first spring.

[0013] The beneficial effects of the present invention are: The present invention provides a 10KV vacuum circuit breaker, comprising: a vacuum arc extinguishing device, the vacuum arc extinguishing device comprising a ceramic shell, a moving contact and a static contact, the moving contact and the static contact are located inside the ceramic shell, the moving contact is movably connected to one end of the ceramic shell, the static contact is fixedly connected to the other end of the ceramic shell, the moving contact is rotatably arranged in the ceramic shell, when the moving contact and the static contact are in contact, the moving contact rotates around a first axis, so that the moving contact and the static contact have rotational friction, and the first axis is the central axis of the ceramic shell. By setting the moving contact and the static contact to have rotational friction, the moving contact and the static contact can eliminate the protrusions generated by the arc through friction, thereby reducing the problem of local heating caused by the protrusions and improving the service life of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a 10KV vacuum circuit breaker provided in one embodiment of the present invention; Figure 2 A schematic structural diagram of a vacuum arc extinguishing device for a 10KV vacuum circuit breaker provided in one embodiment of the present invention; Figure 3 for Figure 2The AA section view of the vacuum arc extinguishing device of the 10KV vacuum circuit breaker; Figure 4 A schematic diagram of the completion of compression of the first spring in the vacuum arc extinguishing device of a 10KV vacuum circuit breaker provided in one embodiment of the present invention; Figure 5 A schematic structural diagram of a 10KV vacuum circuit breaker spring operating mechanism provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a 10KV vacuum circuit breaker spring operating mechanism provided by an embodiment of the present invention, in which the left side plate is hidden for easy observation; Figure 7 This is a structural schematic diagram of a 10KV vacuum circuit breaker spring operating mechanism provided by an embodiment of the present invention, in which the right side plate is hidden for easy observation.

[0015] in: 100, shell; 102, base; 104, connecting shell; 1041, upper power connector; 1042, lower power connector.

[0016] 200, vacuum arc extinguishing device; 201, ceramic shell; 202, moving contact; 2021, energized shell; 203, static contact; 204, threaded rod; 206, first spring; 207, push plate.

[0017] 300, spring mechanism; 302, left side plate; 304, right side plate; 306, indication assembly; 3062, counter; 3064, opening and closing indication plate; 3066, energy storage indication plate; 3068, opening and closing indication shaft; 308, energy storage assembly; 3082, hanging spring shaft; 3084, energy storage spring; 3086, energy storage shaft; 310, opening assembly; 3102, opening roller; 3104, opening plate; 3106, opening half shaft; 312, closing assembly; 3122, closing half shaft; 3124, closing plate; 3126, closing roller; 3128, cam; 314, output shaft. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 to the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a 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.

[0021] Refer to the following Figure 1-Figure 7 A 10KV vacuum circuit breaker provided in an embodiment of the present invention is described.

[0022] The 10KV vacuum circuit breaker provided in the embodiment of the present invention is particularly suitable for various power systems, such as industrial production, commercial buildings, power transmission and other fields.

[0023] Specifically, Figure 1-Figure 2As shown, the 10KV vacuum circuit breaker includes a housing 100, a base 102, a connecting housing 104, a vacuum arc extinguishing device 200 and a transmission mechanism (not shown in the figure). The housing 100 is used to form a relatively isolated working environment. The housing 100 is placed on the base 102, and the base 102 is placed on the ground or other stable foundations. The connecting housing 104 is fixedly connected to the housing 100, and the connecting housing 104 is used to provide a working area for the vacuum arc extinguishing device 200. The upper part of the connecting housing 104 is provided with an upper power-on connector 1041, and the lower part of the connecting housing 104 is provided with a lower power-on connector 1042. The upper power-on connector 1041 and the lower power-on connector 1042 are used to provide current for the vacuum arc extinguishing device 200. The vacuum arc extinguishing device 200 is located inside the connection housing 104. The vacuum arc extinguishing device 200 is used to quickly extinguish the arc and suppress the current after the current is cut off. The transmission mechanism is located in the shell. The transmission mechanism is used to provide the power required for closing and opening the vacuum arc extinguishing device 200 when the circuit is broken or overloaded.

[0024] like Figure 2-Figure 3 As shown, the vacuum arc extinguishing device 200 is provided with a ceramic housing 201, a moving contact 202 and a stationary contact 203. The ceramic housing 201 is used to form a vacuum working environment, and the moving contact 202 and the stationary contact 203 are used to connect and disconnect the circuit. The moving contact 202 and the stationary contact 203 are located inside the ceramic housing 201. The moving contact 202 is movably arranged in the ceramic housing 201, and the stationary contact 203 is fixedly arranged in the ceramic housing 201. When the moving contact 202 and the stationary contact 203 are in contact, the circuit is connected. When the moving contact 202 and the stationary contact 203 are separated, the vacuum environment is used to extinguish the arc to achieve circuit disconnection.

[0025] When the vacuum arc extinguishing device 200 is working, it forms a closing stage and an opening stage. In the closing stage, the moving contact 202 moves toward the static contact 203, and finally the moving contact 202 and the static contact 203 are closed to complete the circuit connection; in the opening stage, the moving contact 202 and the static contact 203 begin to separate, and finally the moving contact 202 reaches the initial position and no longer moves.

[0026] When the vacuum arc extinguishing device 200 interrupts the current, an arc will be generated between the moving contact 202 and the stationary contact 203, and the high temperature of the arc will evaporate the metal on the surface of the moving contact 202 and the stationary contact 203. When the current naturally passes through zero, the arc current between the moving contact 202 and the stationary contact 203 is reduced to zero. After the arc is extinguished, the evaporated metal vapor will condense on the contact surface or other parts to form some protrusions. These protrusions will change the surface morphology and electric field distribution of the moving contact 202 and the stationary contact 203, and affect the breaking performance of the vacuum arc extinguishing device 200. In order to eliminate the adverse effects of the protrusions, the moving contact 202 is rotatably arranged in the ceramic housing 201. When the moving contact 202 and the stationary contact 203 are in contact, the moving contact 202 rotates around the first axis, so that the moving contact 202 and the stationary contact 203 have rotational friction, and the first axis is the central axis of the ceramic housing 201. Specifically, in the closing stage, since there are protrusions on the moving contact 202 and the static contact 203 after arc erosion, the moving contact 202 and the static contact 203 first contact the protrusions when they come into contact. When the protrusions of the moving contact 202 and the protrusions of the static contact 203 come into contact, the moving contact 202 and the static contact 203 rotate relative to each other, thereby rubbing the protrusions. As a result, the protrusions are worn after friction, reducing the height of the protrusions, thereby reducing the concentration of arcs in a certain area, reducing the current density and temperature in the area, thereby improving the stability of the arc, reducing erosion and material loss. Furthermore, the worn protrusions can reduce surface roughness, improve the electrical strength of the surfaces of the moving contact 202 and the static contact 203, and enhance the ability to withstand voltage.

[0027] In one embodiment, if Figure 3 As shown, in order to make the moving contact 202 and the stationary contact 203 rotate relative to each other better, the moving contact 202 can slide along the first axis, and the moving contact 202 slides along the first axis, driving the moving contact 202 to rotate around the first axis. Specifically, a rotating device is provided at the connection between the moving contact 202 and the transmission mechanism. In the closing stage, when the transmission mechanism provides the moving contact 202 with power to move upward, the transmission mechanism drives the rotating device to provide the moving contact 202 with power to rotate, and the rotating device causes the moving contact 202 to rotate relative to the stationary contact 203 when it contacts. In this way, the purpose of the friction protrusion is achieved through the rotating device, and the friction efficiency is improved.

[0028] In one embodiment, if Figure 3As shown, in order to use a simpler structure to make the moving contact 202 and the stationary contact 203 rotate relative to each other, a threaded hole is provided in the ceramic housing 201, and the moving contact 202 is fixedly connected with a threaded rod 204. The threaded hole and the threaded rod 204 are threadedly connected. When the threaded rod 204 slides along the first axis, the threaded rod 204 rotates around the first axis. Specifically, the end of the threaded rod 204 away from the moving contact 202 is connected to a transmission mechanism. When the transmission mechanism drives the moving contact 202 to move along the first axis, the moving contact 202 rotates during the movement due to the threaded transmission connection between the threaded rod 204 and the threaded port. In the closing stage, the transmission mechanism drives the moving contact 202 to move upward, and at the same time, under the transmission action of the threaded rod 204 and the threaded port, the moving contact 202 rotates upward; in the opening stage, the transmission mechanism drives the moving contact 202 to move downward, and under the transmission action of the threaded rod 204 and the threaded port, the moving contact 202 rotates downward in the opposite direction. It is understandable that the rotation speed of the moving contact 202 can also be changed by changing the pitch of the threaded rod 204 and the threaded hole.

[0029] In one embodiment, if Figure 3 As shown, since too much metal vapor will be ionized under the action of the electric field to form plasma, thereby maintaining the burning of the arc, the presence of metal vapor will reduce the medium recovery speed between the moving contact 202 and the static contact 203, and increase the risk of the arc reigniting. In order to reduce the adverse effects caused by metal vapor, an energized structure is provided in the ceramic housing 201, and the energized structure is used to form a magnetic field when the circuit is turned on. The magnetic field always causes the magnetic medium between the moving contact 202 and the static contact 203 to move toward the moving contact 202. It can be understood that during the operation of the vacuum arc extinguishing device 200, metal vapor will be generated between the moving contact 202 and the static contact 203. On the one hand, when the moving contact 202 and the static contact 203 are separated, the contact area is sharply reduced, the current density increases sharply, and the surface temperature of the moving contact 202 and the static contact 203 rises rapidly, which can reach the melting point or even the boiling point of the contact material, causing the contact material to evaporate and form metal vapor. On the other hand, the energy of the arc generated in the opening stage is extremely high, and the high temperature of the arc will strongly heat the surface of the moving contact 202 and the surface of the static contact 203, causing a large amount of contact material to melt and vaporize, further increasing the concentration of metal vapor. At the same time, the unstable movement of the arc will continuously change the heating position of the moving contact 202 and the static contact 203, prompting more parts of the contact material to be converted into metal vapor. Specifically, an electromagnet is set in the ceramic housing 201. When the circuit is connected, the electromagnet generates a magnetic field. Due to the influence of the Lorentz force, the metal vapor will move toward the moving contact 202 along the direction of the magnetic field. Therefore, when the metal vapor moves toward the moving contact 202, the metal vapor concentration between the moving contact 202 and the static contact 203 can be reduced, thereby increasing the medium recovery speed and reducing the risk of arc reignition.

[0030] In one embodiment, if Figure 3 As shown, after the metal vapor condenses on the surface of the moving contact 202, it absorbs a large amount of heat, causing the surface temperature of the contact to further increase, thereby accelerating the ablation of the moving contact 202. In order to reduce the retention of metal vapor on the surface of the moving contact 202, a powered shell 2021 is provided on the moving contact 202, and a storage area is formed inside the powered shell 2021. The magnetic field always causes the magnetic medium to flow to the storage area. Specifically, a hollow powered shell 2021 is provided on the moving contact 202, and a storage area can be formed inside the powered shell 2021. A through hole is provided on the moving contact 202, and the through hole is used to provide a channel for the metal vapor to enter the powered shell 2021. When the circuit is connected to generate a magnetic field, the metal vapor between the moving contact 202 and the static contact 203 is affected by the magnetic field, and the metal vapor enters the storage area through the through hole on the moving contact 202 along the direction of the magnetic field, and finally stays in the storage area.

[0031] Therefore, by setting a metal vapor storage area on the moving contact 202, the metal vapor no longer remains on the surface of the moving contact 202, thereby reducing the ablation of the surface of the moving contact 202. At the same time, by setting a metal vapor storage area on the moving contact 202, the amount of metal vapor between the moving contact 202 and the static contact 203 can be greatly reduced, and the insulation performance between the moving contact 202 and the static contact 203 can be effectively restored and maintained to ensure the normal switching of the circuit. It is also beneficial to the rapid diffusion and cooling of the arc, making the arc extinguishing process more efficient, improving the arc extinguishing ability of the vacuum arc extinguishing device 200, and ensuring reliable current cutting off.

[0032] In one embodiment, if Figure 3-Figure 4 As shown, in order to better form a magnetic field, a first spring 206 is provided in the power-on structure, and the first spring 206 is provided between the moving contact 202 and the threaded rod 204. The first spring 206 is used to conduct the current between the moving contact 202 and the threaded rod 204. Specifically, in the closing stage, the transmission mechanism provides an upward force for the threaded rod 204, so that the threaded rod 204 contacts the first spring 206, thereby driving the first spring 206 so that the other end of the first spring 206 contacts the moving contact 202, and the current flows through the threaded rod 204, the first spring 206 and the moving contact 202. When an arc is generated between the moving contact 202 and the static contact 203, the first spring 206 generates a magnetic field, which absorbs the metal vapor between the moving contact 202 and the static contact 203. Since the magnetic field of the first spring 206 responds quickly. As a result, when an arc is formed, the first spring 206 quickly generates a magnetic field, driving the metal vapor into the moving contact 202, which helps to act on the metal vapor in the early stage of arc formation, reduce the residual metal vapor between the moving contact 202 and the static contact 203, and reduce the risk of arc reignition.

[0033] In one embodiment, if Figure 3-Figure 4 As shown, in order to make the first spring 206 better connect the circuit, one end of the first spring 206 is fixedly connected to the moving contact 202, and the other end of the first spring 206 is fixedly connected to the threaded rod 204. As a result, the current on the threaded rod 204 directly passes through the first spring 206 to reach the moving contact 202, providing a stable path for the transmission of the current, which can effectively reduce the intermediate links and make the current transmission path more direct and stable.

[0034] In one embodiment, if Figure 3-Figure 4 As shown, since the first spring 206 generates heat when current passes through, long-term use may cause the first spring 206 to deform and break. In order to reduce the damage to the first spring 206, when the moving contact 202 and the static contact 203 are in full contact and the circuit is turned on, any two turns of the first spring 206 are in contact with each other. Specifically, when the moving contact 202 and the static contact 203 are in full contact and the circuit is turned on, the threaded rod 204 compresses the first spring 206, so that the first spring 206 forms a barrel-shaped structure, that is, any two adjacent turns of the first spring 206 are in contact with each other without any gap. At this time, the current moves along the axial direction of the first spring 206, the current path becomes shorter, the resistance is reduced, and the resistance distribution is more uniform, which reduces the local overheating and ablation of the first spring 206 and extends the service life of the first spring 206.

[0035] In one embodiment, if Figure 3-Figure 4 As shown, in order to better compress the first spring 206 through a simple structure, a push plate 207 is provided on the threaded rod 204, and the push plate 207 is used to compress the first spring 206 so that any two circles of the first spring 206 contact each other. Specifically, one end of the first spring 206 is fixed on the moving contact 202, and the outermost circle of the other end of the first spring 206 is fixed on the push plate 207. In the closing stage, when the transmission mechanism drives the threaded rod 204 to move upward, it drives the push plate 207 to compress the first spring 206; when the closing stage ends, the push plate 207 compresses the first spring 206 to form a barrel-shaped structure; in the opening stage, the transmission mechanism drives the threaded rod 204 to move downward, and the first spring 206 moves and releases following the push plate 207. Therefore, by providing the push plate 207, the contact area between the threaded rod 204 and the first spring 206 is increased, so that the first spring 206 is more stable during the working process.

[0036] In one embodiment, if Figure 3-Figure 4 As shown, in order to improve the contact stability of the first spring 206, a step structure is provided on the first spring 206, and the step structure is provided at the contact point of any two turns of the first spring 206. The step structure can increase the contact area between the turns of the first spring 206, thereby improving the stability of the first spring 206, reducing the poor contact of the first spring 206 caused by vibration or impact, and ensuring the stability of current transmission.

[0037] like Figure 5-Figure 7 As shown, the present invention provides a spring mechanism 300 of a 10KV vacuum circuit breaker, comprising a left side plate 302, a right side plate 304, an indication assembly 306, an energy storage assembly 308, a switch-off assembly 310, a switch-on assembly 312 and an output shaft 314. The left side plate 302 and the right side plate 304 are used to fix the indication assembly 306, the energy storage assembly 308, the switch-off assembly 310, the switch-on assembly 312 and the output shaft 314, the indication assembly 306 is used to convey the operating state information of the spring mechanism 300, the energy storage assembly 308 is used to store and release energy, and provide operating power for the switch-off assembly 310 and the switch-on assembly 312, the switch-off assembly 310 is used to make the output shaft 314 output the switch-off power, the switch-on assembly 312 is used to make the output shaft 314 output the switch-on power, and the output shaft 314 is used to provide operating power for the vacuum arc extinguishing device 200.

[0038] Among them, the indication component 306 includes a counter 3062, an opening and closing indicator plate 3064, an energy storage indicator plate 3066, and an opening and closing indicator shaft 3068; the energy storage component 308 includes a hanging spring shaft 3082, an energy storage spring 3084, and an energy storage shaft 3086; the opening component 310 includes an opening roller 3102, an opening plate 3104, and an opening half-shaft 3106; the closing component 312 includes a closing half-shaft 3122, a closing plate 3124, a closing roller 3126, and a cam 3128.

[0039] The counter 3062 is connected to the opening and closing indicator plate 3064 through a spring. The opening and closing indicator plate 3064 moves up and down to drive the counter 3062 to count. The counter 3062 is used to display the number of closing and opening actions. The energy storage indicator plate 3066 is driven to move up and down by the rotation of the energy storage shaft 3086. The energy storage indicator plate 3066 is used to display the energy storage state. The opening and closing indicator shaft 3068 is driven to rotate by the rotation of the output shaft 314 and the opening and closing indicator plate 3064 is driven to move up and down. The opening and closing indicator plate 3064 is used to display the opening state or the closing state.

[0040] The spring shaft 3082 is used to stretch the energy storage spring 3084 so that the energy storage spring 3084 can store energy.

[0041] The opening half shaft 3106 is connected with the opening pinch plate 3104 to perform a tripping action, driving the opening latch and the opening roller 3102 to disengage, and the opening assembly 310 completes the opening action.

[0042] The closing half shaft 3122 is connected with the closing plate 3124 for performing a tripping action. When the cam 3128 hits the closing roller 3126, it drives the opening roller 3102 on the output shaft 314 to contact the opening latch inside the opening plate 3104, and the closing assembly 312 completes the closing action.

[0043] The present invention provides a spring mechanism for a 10KV vacuum circuit breaker, which realizes the energy storage, closing and opening operations of the 10KV vacuum circuit breaker through mechanical cooperation between the mechanism and matching components, so that the energy storage, closing and opening operations can be smoothly performed, avoiding poor contact of contacts caused by unstable transmission, improving the reliability of the entire system, extending the service life of the 10KV vacuum circuit breaker, and reducing the economic burden and resource waste caused by frequent replacement of equipment. At the same time, due to the reasonable structural design and the simple and reliable use of parts and components, maintenance personnel can quickly locate the problem and carry out corresponding maintenance and replacement work, thereby improving work efficiency.

[0044] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A 10KV vacuum circuit breaker, characterized in that: include: A vacuum arc extinguishing device, the vacuum arc extinguishing device includes a ceramic shell, a moving contact and a static contact, the moving contact and the static contact are located inside the ceramic shell, the moving contact is movably connected to one end of the ceramic shell, the static contact is fixedly connected to the other end of the ceramic shell, the moving contact is rotatably arranged in the ceramic shell, when the moving contact and the static contact are in contact, the moving contact rotates around a first axis, so that the moving contact and the static contact generate rotational friction, the first axis is the central axis of the ceramic shell.

2. A 10KV vacuum circuit breaker according to claim 1, characterized in that: The moving contact can slide along the first axis, and the moving contact slides along the first axis, driving the moving contact to rotate around the first axis.

3. A 10KV vacuum circuit breaker according to claim 2, characterized in that: The ceramic housing is provided with a threaded hole, the moving contact is fixedly connected with a threaded rod, the threaded hole and the threaded rod are threadedly connected, and when the threaded rod slides along the first axis, the threaded rod rotates around the first axis.

4. A 10KV vacuum circuit breaker according to claim 3, characterized in that: An energizing structure is arranged in the ceramic housing, and the energizing structure is used to form a magnetic field when the circuit is turned on, and the magnetic field always causes the magnetic medium between the moving contact and the stationary contact to move toward the moving contact.

5. A 10KV vacuum circuit breaker according to claim 4, characterized in that: The moving contact is provided with an energized shell, a storage area is formed in the energized shell, and the magnetic field always causes the magnetic medium to flow to the storage area.

6. A 10KV vacuum circuit breaker according to claim 4, characterized in that: The power-on structure includes a first spring, which is disposed between the moving contact and the threaded rod, and is used to conduct current between the moving contact and the threaded rod.

7. A 10KV vacuum circuit breaker according to claim 6, characterized in that: One end of the power-on spring is fixedly connected to the moving contact, and the other end of the power-on spring is fixedly connected to the threaded rod.

8. A 10KV vacuum circuit breaker according to claim 6, characterized in that: When the moving contact and the stationary contact are in full contact and the circuit is turned on, any two turns of the first spring are in contact with each other.

9. A 10KV vacuum circuit breaker according to claim 8, characterized in that: The threaded rod is provided with a push plate, and the push plate is used to compress the first spring so that any two turns of the first spring contact each other.

10. A 10KV vacuum circuit breaker according to claim 8, characterized in that: The first spring is provided with a step structure, and the step structure is provided at the contact point between any two turns of the first spring.

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