A circuit breaker

Abstract

The present invention discloses a novel circuit breaker, including an arc extinguishing hood, wherein a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged in the arc extinguishing hood, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged in an interlaced manner; a high-voltage electrode channel is arranged at the lower part of the arc extinguishing hood, and a high-voltage electrode is arranged in the high-voltage electrode channel, and the high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly, and a low-voltage electrode is arranged in the center of the fixed arc extinguishing assembly, and during the disconnection process of the high-voltage electrode, the high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, so as to stretch the arc between the high-voltage electrode and the low-voltage electrode to extinguish the arc. When the high-voltage electrode is disconnected, the present invention moves, and drives the rotating arc extinguishing ring to rotate relative to the fixed arc extinguishing ring through the connecting assembly, so that the arc is stretched to 5-80 times of the initial length, or even higher multiples, in a purely mechanical manner, so as to achieve the purpose of efficient arc extinguishing.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a novel circuit breaker. Background Art

[0002] Electrical facilities such as high-voltage circuit breakers have always faced the problem of arc interruption difficulties and arc erosion damage to equipment. Although there are a large number of mature related technical products in this field, from the perspective of cost and effect, it is still necessary to continuously carry out technological innovation and explore new technologies and products with lower costs, better working effects and environmental friendliness. Therefore, it is necessary to design a new type of circuit breaker that can extinguish arcs efficiently. Summary of the invention

[0003] In view of the arc extinction problem existing in the existing circuit breakers, the present invention provides a new type of circuit breaker to achieve the function of efficiently cutting off the power frequency current.

[0004] The present invention adopts the following technical solutions:

[0005] A novel circuit breaker comprises an arc extinguishing hood, wherein a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged in the arc extinguishing hood, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged alternately; a high-voltage electrode channel is arranged at the lower part of the arc extinguishing hood, a high-voltage electrode is arranged in the high-voltage electrode channel, and the high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly; a low-voltage electrode is arranged at the center of the fixed arc extinguishing assembly; during the disconnection process of the high-voltage electrode, the high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, so that the arc between the high-voltage electrode and the low-voltage electrode is stretched to extinguish the arc.

[0006] Preferably, the fixed arc extinguishing assembly includes a plurality of concentric fixed arc extinguishing rings arranged in sequence from the inside to the outside, and the rotating arc extinguishing assembly includes a plurality of concentric rotating arc extinguishing rings arranged in sequence from the inside to the outside, the fixed arc extinguishing rings and the rotating arc extinguishing rings are arranged alternately, the fixed arc extinguishing ring is fixedly arranged between two adjacent rotating arc extinguishing rings, and the rotating arc extinguishing ring can rotate relative to the fixed arc extinguishing ring.

[0007] Preferably, the cross-sections of the fixed arc extinguishing ring and the rotating arc extinguishing ring are arcs with an arc angle greater than 180°, and the arc angles of all the fixed arc extinguishing rings and the rotating arc extinguishing rings are kept consistent.

[0008] Preferably, the arc extinguishing cover is a closed flat cylindrical structure, which includes a first disc and a second disc, a fixed arc extinguishing ring is fixedly connected between the first disc and the second disc, and a rotating arc extinguishing ring is slidably connected between the first disc and the second disc, and the rotating arc extinguishing ring can rotate and slide on the first disc and the second disc.

[0009] Preferably, annular slideways are evenly spaced on the first disc and the second disc, the upper slideway of the rotary arc extinguishing ring is connected to the slideway of the first disc, and the lower slideway of the rotary arc extinguishing ring is connected to the slideway of the second disc.

[0010] Preferably, the high-voltage electrode channel is communicated with the arc extinguishing hood, the high-voltage electrode is a cylindrical electrode, and the high-voltage electrode can move up and down in the high-voltage electrode channel.

[0011] Preferably, a limit block is provided on the high-voltage electrode, and the connection assembly includes a limit sleeve, a linkage belt and a connecting rod. The limit sleeve is sleeved on the high-voltage electrode and is located below the limit block. Connecting columns are arranged at intervals on the linkage belt, and the connecting columns pass through the slideway of the second disc and are connected to the lower part of the rotating arc extinguishing ring. The linkage belt and the connecting column connect the lower parts of all the rotating arc extinguishing rings together. The linkage belt is located outside the second disc, and one end of the linkage belt is hinged to the outer center of the second disc; one end of the connecting rod is hinged to the limit sleeve, and the other end of the connecting rod is hinged to the linkage belt;

[0012] Preferably, the high-voltage electrode drives the limit block to move, the limit block drives the limit sleeve to move, and the limit sleeve drives the linkage belt and the rotating arc-extinguishing ring to slide in the slideway through the connecting rod.

[0013] Preferably, the fixed arc-extinguishing ring, the rotating arc-extinguishing ring, the arc-extinguishing cover, the limiting sleeve, the linkage belt and the connecting rod are made of insulating materials such as resin, silicone rubber, epoxy board, bakelite board, diphenyl ether board or silicone board.

[0014] Preferably, inner walls of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the first disc and the second disc are all provided with grid protrusions.

[0015] Preferably, the difference between the radius of adjacent fixed arc extinguishing rings and the radius of adjacent rotating arc extinguishing rings is equal.

[0016] Preferably, the high voltage electrode and the low voltage electrode are made of stainless steel, aluminum, copper or silver.

[0017] Preferably, the low-voltage electrode is led to the outside of the arc-extinguishing hood through an insulated wire.

[0018] Preferably, the perforations between the insulated conductor and the arc extinguishing hood are sealed.

[0019] The present invention has the following beneficial effects:

[0020] The present invention provides a novel circuit breaker. When the high-voltage electrode is disconnected, the high-voltage electrode moves, and the rotating arc extinguishing ring is driven to rotate relative to the fixed arc extinguishing ring through the connecting assembly. In this purely mechanical way, the arc is stretched to 5-80 times of the initial length, or even higher times, to achieve the purpose of efficient arc extinguishing. The present invention can extinguish the continuous arc generated by the circuit breaker during the breaking process, and prevent the arc from causing damage to electrical facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the main structure of the new circuit breaker when the arc angle is 235°.

[0023] Figure 2 It is a schematic diagram of the rotating arc extinguishing ring, arc extinguishing cover and linkage belt.

[0024] Figure 3 Schematic diagram of the linkage belt connected to a rotating arc extinguishing ring.

[0025] Figure 4 This is a schematic diagram of the circuit breaker's external structure and insulated wires.

[0026] Figure 5 This is a schematic diagram of the linkage belt operation.

[0027] Figure 6 Schematic diagram of the grid protrusion structure.

[0028] Figure 7 This is a schematic diagram of the circuit breaker operation when the arc angle is 235°.

[0029] Figure 8 This is a schematic diagram of the main structure of the new circuit breaker when the arc angle is 270°.

[0030] 1. Low-voltage electrode, 2. High-voltage electrode, 3. Fixed arc-extinguishing ring, 4. Rotating arc-extinguishing ring, 5. Electric arc, 6. Arc-extinguishing cover, 7. Connecting column, 8. Linkage belt, 9. Shaft, 10. Connecting rod, 11. Limit block, 12. Limit sleeve, 13. High-voltage electrode channel, 14. Slideway of the first disc, 15. Slideway of the second disc, 16. Insulated wire. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it is to be understood that 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., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] Combination Figures 1 to 7 A novel circuit breaker includes an arc extinguishing hood 6, in which a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged alternately.

[0037] A high-voltage electrode channel 13 is provided at the lower part of the arc extinguishing hood, and a high-voltage electrode 2 is provided in the high-voltage electrode channel. The high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly.

[0038] A low-voltage electrode 1 is arranged in the center of the fixed arc-extinguishing assembly.

[0039] During the disconnection process of the high-voltage electrode, the high-voltage electrode is separated from the low-voltage electrode, and the high-voltage electrode moves downward. The high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly. The rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, and the arc 5 between the high-voltage electrode and the low-voltage electrode is stretched to achieve the purpose of extinguishing the arc and interrupting the current.

[0040] Specifically, the fixed arc extinguishing assembly includes a plurality of concentric fixed arc extinguishing rings 3 arranged in sequence from the inside to the outside, and the rotating arc extinguishing assembly includes a plurality of concentric rotating arc extinguishing rings 4 arranged in sequence from the inside to the outside. The fixed arc extinguishing rings and the rotating arc extinguishing rings are arranged alternately, and the fixed arc extinguishing ring is fixedly arranged between two adjacent rotating arc extinguishing rings, and the rotating arc extinguishing ring can rotate relative to the fixed arc extinguishing ring.

[0041] Specifically, the cross-sections of the fixed arc extinguishing ring 3 and the rotating arc extinguishing ring 4 are both arcs with an arc angle of 235°, and the arc angles of all the fixed arc extinguishing rings and the rotating arc extinguishing rings are consistent. Figure 1 .

[0042] The arc extinguishing cover is a closed flat cylindrical structure, which includes a first disc and a second disc. A fixed arc extinguishing ring is fixedly connected between the first disc and the second disc, and a rotating arc extinguishing ring is slidably connected between the first disc and the second disc. The rotating arc extinguishing ring can rotate and slide on the first disc and the second disc.

[0043] The space between the arc extinguishing cover, the fixed arc extinguishing ring and the rotating arc extinguishing ring constitutes an arc extinguishing cavity. The relative movement of the fixed arc extinguishing ring and the rotating arc extinguishing ring effectively extinguishes the arc between the high-voltage electrode and the low-voltage electrode in the arc extinguishing cavity.

[0044] Annular slideways are evenly spaced on the first disc and the second disc. The upper slideway of the rotary arc extinguishing ring is connected to the slideway 14 of the first disc, and the lower slideway of the rotary arc extinguishing ring is connected to the slideway 15 of the second disc.

[0045] The high-voltage electrode channel 13 is communicated with the arc extinguishing cover. The high-voltage electrode 2 is a cylindrical electrode and can move up and down in the high-voltage electrode channel.

[0046] like Figure 1 A limiting block 11 is provided on the high voltage electrode.

[0047] The connection assembly includes a limit sleeve 12, a linkage belt 8 and a connecting rod 10. The limit sleeve is sleeved on the high-voltage electrode and is located below the limit block. The linkage belt is provided with connecting columns 7 at intervals. The connecting columns pass through the slideway of the second disc and are connected to the lower part of the rotating arc extinguishing ring. Figure 2The linkage belt and the connecting column connect the lower parts of all rotating arc extinguishing rings together. The linkage belt is located outside the second disc, and one end of the linkage belt is hinged to the outer center of the second disc. One end of the connecting rod is hinged to the limit sleeve through the shaft 9, and the other end of the connecting rod is hinged to the linkage belt.

[0048] The linkage belt always remains in the radial direction of the arc extinguishing hood, ensuring the consistency and synchronization of the movement of each rotating arc extinguishing ring.

[0049] When the high voltage electrode drives the limit block to move downward, the limit block drives the limit sleeve to move, and the limit sleeve drives the linkage belt and the rotating arc extinguishing ring to slide in the slideway through the connecting rod. The arc is stretched to 5-80 times the initial length or even higher in a purely mechanical way by rotating the rotating arc extinguishing ring relative to the fixed arc extinguishing ring, so as to achieve the purpose of efficient arc extinguishing. Figure 7 .

[0050] The materials of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the arc extinguishing cover, the limiting sleeve, the linkage belt and the connecting rod are insulating materials such as resin, silicone rubber, epoxy board, bakelite board, diphenyl ether board or organic silicon board.

[0051] The inner walls of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the first disc and the second disc are all provided with grid protrusions to increase the creepage distance of the inner wall so that the air breakdown voltage at the same distance is smaller than the creepage breakdown voltage of the inner wall surface. Figure 6 shown.

[0052] The difference between the radius of adjacent fixed arc extinguishing rings and the radius of the rotating arc extinguishing rings is equal.

[0053] In fact, the number of fixed arc extinguishing rings and rotating arc extinguishing rings can be adjusted according to the breaking current, and the value range is an integer in [0,∞).

[0054] The high voltage electrode and low voltage electrode are made of stainless steel, aluminum, copper or silver.

[0055] The low voltage electrode is led to the outside of the arc extinguishing hood through an insulated wire 16. In order to connect with the low voltage side of the arc to be extinguished, the perforations between the insulated wire and the arc extinguishing hood are strictly sealed to prevent the arc from passing through. Figure 4 shown.

[0056] In this example, the number of fixed arc extinguishing rings is 6. By deduction, it can be seen that when the rotating arc extinguishing ring rotates to lengthen the arc, the arc length is 7.38 times the initial arc length, achieving a better arc extinguishing effect. Figure 7 shown.

[0057] Example 2

[0058] Combination Figures 1 to 8A novel circuit breaker includes an arc extinguishing hood 6, in which a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged alternately.

[0059] A high-voltage electrode channel 13 is provided at the lower part of the arc extinguishing hood, and a high-voltage electrode 2 is provided in the high-voltage electrode channel. The high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly.

[0060] A low-voltage electrode 1 is arranged in the center of the fixed arc-extinguishing assembly.

[0061] During the disconnection process of the high-voltage electrode, the high-voltage electrode is separated from the low-voltage electrode, and the high-voltage electrode moves downward. The high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly. The rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, and the arc 5 between the high-voltage electrode and the low-voltage electrode is stretched to achieve the purpose of extinguishing the arc and interrupting the current.

[0062] Specifically, the fixed arc extinguishing assembly includes a plurality of concentric fixed arc extinguishing rings 3 arranged in sequence from the inside to the outside, and the rotating arc extinguishing assembly includes a plurality of concentric rotating arc extinguishing rings 4 arranged in sequence from the inside to the outside. The fixed arc extinguishing rings and the rotating arc extinguishing rings are arranged alternately, and the fixed arc extinguishing ring is fixedly arranged between two adjacent rotating arc extinguishing rings, and the rotating arc extinguishing ring can rotate relative to the fixed arc extinguishing ring.

[0063] Specifically, the cross-sections of the fixed arc extinguishing ring 3 and the rotating arc extinguishing ring 4 are both arcs with an arc angle of 270°, and the arc angles of all the fixed arc extinguishing rings and the rotating arc extinguishing rings are consistent. Figure 8 .

[0064] The arc extinguishing cover is a closed flat cylindrical structure, which includes a first disc and a second disc. A fixed arc extinguishing ring is fixedly connected between the first disc and the second disc, and a rotating arc extinguishing ring is slidably connected between the first disc and the second disc. The rotating arc extinguishing ring can rotate and slide on the first disc and the second disc.

[0065] The space between the arc extinguishing cover, the fixed arc extinguishing ring and the rotating arc extinguishing ring constitutes an arc extinguishing cavity. The relative movement of the fixed arc extinguishing ring and the rotating arc extinguishing ring effectively extinguishes the arc between the high-voltage electrode and the low-voltage electrode in the arc extinguishing cavity.

[0066] Annular slideways are evenly spaced on the first disc and the second disc. The upper slideway of the rotary arc extinguishing ring is connected to the slideway 14 of the first disc, and the lower slideway of the rotary arc extinguishing ring is connected to the slideway 15 of the second disc.

[0067] The high-voltage electrode channel 13 is communicated with the arc extinguishing cover. The high-voltage electrode 2 is a cylindrical electrode and can move up and down in the high-voltage electrode channel.

[0068] like Figure 8 A limiting block 11 is provided on the high voltage electrode.

[0069] The connection assembly includes a limit sleeve 12, a linkage belt 8 and a connecting rod 10. The limit sleeve is sleeved on the high-voltage electrode and is located below the limit block. The linkage belt is provided with connecting columns 7 at intervals. The connecting columns pass through the slideway of the second disc and are connected to the lower part of the rotating arc extinguishing ring. Figure 2 The linkage belt and the connecting column connect the lower parts of all the rotating arc extinguishing rings together. The linkage belt is located outside the second disc, and one end of the linkage belt is hinged to the outer center of the second disc; one end of the connecting rod is hinged to the limit sleeve, and the other end of the connecting rod is hinged to the linkage belt.

[0070] The linkage belt always remains in the radial direction of the arc extinguishing hood, ensuring the consistency and synchronization of the movement of each rotating arc extinguishing ring.

[0071] When the high voltage electrode drives the limit block to move downward, the limit block drives the limit sleeve to move, and the limit sleeve drives the linkage belt and the rotating arc extinguishing ring to slide in the slideway through the connecting rod. The arc is stretched to 5-80 times the initial length or even higher in a purely mechanical way by rotating the rotating arc extinguishing ring relative to the fixed arc extinguishing ring, so as to achieve the purpose of efficient arc extinguishing. Figure 7 .

[0072] The materials of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the arc extinguishing cover, the limiting sleeve, the linkage belt and the connecting rod are insulating materials such as resin, silicone rubber, epoxy board, bakelite board, diphenyl ether board or organic silicon board.

[0073] The inner walls of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the first disc and the second disc are all provided with grid protrusions to increase the creepage distance of the inner wall so that the air breakdown voltage at the same distance is smaller than the creepage breakdown voltage of the inner wall surface. Figure 6 shown.

[0074] The difference between the radius of adjacent fixed arc extinguishing rings and the radius of the rotating arc extinguishing rings is equal.

[0075] In fact, the number of fixed arc extinguishing rings and rotating arc extinguishing rings can be adjusted according to the breaking current, and the value range is an integer in [0,∞).

[0076] The high voltage electrode and low voltage electrode are made of stainless steel, aluminum, copper or silver.

[0077] The low voltage electrode is led to the outside of the arc extinguishing hood through an insulated wire 16. In order to connect with the low voltage side of the arc to be extinguished, the perforations between the insulated wire and the arc extinguishing hood are strictly sealed to prevent the arc from passing through. Figure 4 shown.

[0078] In this example, the number of fixed arc extinguishing rings is 6. It can be deduced that when the rotating arc extinguishing ring rotates to lengthen the arc, the arc length is 13.59 times the initial arc length, achieving a better arc extinguishing effect. Figure 7 shown.

[0079] Example 3

[0080] Combination Figures 1 to 8 A novel circuit breaker includes an arc extinguishing hood 6, in which a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged alternately.

[0081] A high-voltage electrode channel 13 is provided at the lower part of the arc extinguishing hood, and a high-voltage electrode 2 is provided in the high-voltage electrode channel. The high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly.

[0082] A low-voltage electrode 1 is arranged in the center of the fixed arc-extinguishing assembly.

[0083] During the disconnection process of the high-voltage electrode, the high-voltage electrode is separated from the low-voltage electrode, and the high-voltage electrode moves downward. The high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly. The rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, and the arc 5 between the high-voltage electrode and the low-voltage electrode is stretched to achieve the purpose of extinguishing the arc and interrupting the current.

[0084] Specifically, the fixed arc extinguishing assembly includes a plurality of concentric fixed arc extinguishing rings 3 arranged in sequence from the inside to the outside, and the rotating arc extinguishing assembly includes a plurality of concentric rotating arc extinguishing rings 4 arranged in sequence from the inside to the outside. The fixed arc extinguishing rings and the rotating arc extinguishing rings are arranged alternately, and the fixed arc extinguishing ring is fixedly arranged between two adjacent rotating arc extinguishing rings, and the rotating arc extinguishing ring can rotate relative to the fixed arc extinguishing ring.

[0085] Specifically, the cross-sections of the fixed arc extinguishing ring 3 and the rotating arc extinguishing ring 4 are both arcs with an arc angle of 270°, and the arc angles of all the fixed arc extinguishing rings and the rotating arc extinguishing rings are consistent. Figure 8 .

[0086] The arc extinguishing cover is a closed flat cylindrical structure, which includes a first disc and a second disc. A fixed arc extinguishing ring is fixedly connected between the first disc and the second disc, and a rotating arc extinguishing ring is slidably connected between the first disc and the second disc. The rotating arc extinguishing ring can rotate and slide on the first disc and the second disc.

[0087] The space between the arc extinguishing cover, the fixed arc extinguishing ring and the rotating arc extinguishing ring constitutes an arc extinguishing cavity. The relative movement of the fixed arc extinguishing ring and the rotating arc extinguishing ring effectively extinguishes the arc between the high-voltage electrode and the low-voltage electrode in the arc extinguishing cavity.

[0088] Annular slideways are evenly spaced on the first disc and the second disc. The upper slideway of the rotary arc extinguishing ring is connected to the slideway 14 of the first disc, and the lower slideway of the rotary arc extinguishing ring is connected to the slideway 15 of the second disc.

[0089] The high-voltage electrode channel 13 is communicated with the arc extinguishing cover. The high-voltage electrode 2 is a cylindrical electrode and can move up and down in the high-voltage electrode channel.

[0090] like Figure 8 A limiting block 11 is provided on the high voltage electrode.

[0091] The connection assembly includes a limit sleeve 12, a linkage belt 8 and a connecting rod 10. The limit sleeve is sleeved on the high-voltage electrode and is located below the limit block. The linkage belt is provided with connecting columns 7 at intervals. The connecting columns pass through the slideway of the second disc and are connected to the lower part of the rotating arc extinguishing ring. Figure 2 The linkage belt and the connecting column connect the lower parts of all the rotating arc extinguishing rings together. The linkage belt is located outside the second disc, and one end of the linkage belt is hinged to the outer center of the second disc; one end of the connecting rod is hinged to the limit sleeve, and the other end of the connecting rod is hinged to the linkage belt.

[0092] The linkage belt always remains in the radial direction of the arc extinguishing hood, ensuring the consistency and synchronization of the movement of each rotating arc extinguishing ring.

[0093] When the high voltage electrode drives the limit block to move downward, the limit block drives the limit sleeve to move, and the limit sleeve drives the linkage belt and the rotating arc extinguishing ring to slide in the slideway through the connecting rod. The arc is stretched to 5-80 times the initial length or even higher in a purely mechanical way by rotating the rotating arc extinguishing ring relative to the fixed arc extinguishing ring, so as to achieve the purpose of efficient arc extinguishing. Figure 7 .

[0094] The materials of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the arc extinguishing cover, the limiting sleeve, the linkage belt and the connecting rod are insulating materials such as resin, silicone rubber, epoxy board, bakelite board, diphenyl ether board or organic silicon board.

[0095] The inner walls of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the first disc and the second disc are all provided with grid protrusions to increase the creepage distance of the inner wall so that the air breakdown voltage at the same distance is smaller than the creepage breakdown voltage of the inner wall surface. Figure 6 shown.

[0096] The difference between the radius of adjacent fixed arc extinguishing rings and the radius of the rotating arc extinguishing rings is equal.

[0097] In fact, the number of fixed arc extinguishing rings and rotating arc extinguishing rings can be adjusted according to the breaking current, and the value range is an integer in [0,∞).

[0098] The high voltage electrode and low voltage electrode are made of stainless steel, aluminum, copper or silver.

[0099] The low voltage electrode is led to the outside of the arc extinguishing hood through an insulated wire 16. In order to connect with the low voltage side of the arc to be extinguished, the perforations between the insulated wire and the arc extinguishing hood are strictly sealed to prevent the arc from passing through. Figure 4 shown.

[0100] In this example, the number of fixed arc extinguishing rings is 20. It can be deduced that when the rotating arc extinguishing ring rotates to lengthen the arc, the arc length is 34.8 times the initial arc length, achieving a better arc extinguishing effect. Figure 7 shown.

[0101] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that: It comprises an arc extinguishing hood, in which a fixed arc extinguishing assembly and a rotating arc extinguishing assembly are arranged, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly are arranged alternately; a high-voltage electrode channel is arranged at the lower part of the arc extinguishing hood, a high-voltage electrode is arranged in the high-voltage electrode channel, and the high-voltage electrode is connected to the rotating arc extinguishing assembly through a connecting assembly, and a low-voltage electrode is arranged at the center of the fixed arc extinguishing assembly. During the disconnection process of the high-voltage electrode, the high-voltage electrode drives the rotating arc extinguishing assembly to rotate through the connecting assembly, and the rotating arc extinguishing assembly and the fixed arc extinguishing assembly rotate relative to each other, so that the arc between the high-voltage electrode and the low-voltage electrode is stretched to extinguish the arc; The fixed arc extinguishing assembly includes a plurality of concentric fixed arc extinguishing rings arranged in sequence from the inside to the outside, and the rotating arc extinguishing assembly includes a plurality of concentric rotating arc extinguishing rings arranged in sequence from the inside to the outside. The fixed arc extinguishing rings and the rotating arc extinguishing rings are arranged alternately, and the fixed arc extinguishing ring is fixedly arranged between two adjacent rotating arc extinguishing rings, and the rotating arc extinguishing ring can rotate relative to the fixed arc extinguishing ring.

2. A circuit breaker according to claim 1, characterized in that: The cross-sections of the fixed arc extinguishing ring and the rotating arc extinguishing ring are both arcs with an arc angle greater than 180°, and the arc angles of all the fixed arc extinguishing rings and the rotating arc extinguishing rings are consistent.

3. A circuit breaker according to claim 1, characterized in that: The arc extinguishing cover is a closed flat cylindrical structure, which includes a first disc and a second disc. A fixed arc extinguishing ring is fixedly connected between the first disc and the second disc, and a rotating arc extinguishing ring is slidably connected between the first disc and the second disc. The rotating arc extinguishing ring can rotate and slide on the first disc and the second disc.

4. A circuit breaker according to claim 3, characterized in that: Annular slideways are evenly spaced on the first disc and the second disc, the upper slideway of the rotary arc extinguishing ring is connected to the slideway of the first disc, and the lower slideway of the rotary arc extinguishing ring is connected to the slideway of the second disc.

5. A circuit breaker according to claim 1, characterized in that: The high-voltage electrode channel is communicated with the arc extinguishing cover, and the high-voltage electrode is a cylindrical electrode, and the high-voltage electrode can move up and down in the high-voltage electrode channel.

6. A circuit breaker according to claim 4, characterized in that: A limit block is arranged on the high-voltage electrode, and the connecting assembly includes a limit sleeve, a linkage belt and a connecting rod. The limit sleeve is sleeved on the high-voltage electrode and is located below the limit block. Connecting columns are arranged at intervals on the linkage belt, and the connecting columns pass through the slideway of the second disc and are connected to the lower part of the rotating arc extinguishing ring. The linkage belt and the connecting columns connect the lower parts of all the rotating arc extinguishing rings together. The linkage belt is located outside the second disc, and one end of the linkage belt is hinged to the outer center of the second disc; one end of the connecting rod is hinged to the limit sleeve, and the other end of the connecting rod is hinged to the linkage belt.

7. A circuit breaker according to claim 6, characterized in that: The high-voltage electrode drives the limit block to move, the limit block drives the limit sleeve to move, and the limit sleeve drives the linkage belt and the rotating arc-extinguishing ring to slide in the slideway through the connecting rod.

8. A circuit breaker according to claim 6, characterized in that: The materials of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the arc extinguishing cover, the limiting sleeve, the linkage belt and the connecting rod are insulating materials such as resin, silicone rubber, epoxy board, bakelite board, diphenyl ether board or organic silicon board.

9. A circuit breaker according to claim 3, characterized in that: The inner walls of the fixed arc extinguishing ring, the rotating arc extinguishing ring, the first disc and the second disc are all provided with grid protrusions.

10. A circuit breaker according to claim 1, characterized in that: The difference between the radius of adjacent fixed arc extinguishing rings and the radius of the rotating arc extinguishing rings is equal.

11. A circuit breaker according to claim 1, characterized in that: The high voltage electrode and the low voltage electrode are made of stainless steel, aluminum, copper or silver.

12. A circuit breaker according to claim 1, characterized in that: The low-voltage electrode is led to the outside of the arc extinguishing hood through an insulated wire.

13. A circuit breaker according to claim 12, characterized in that: The perforations between the insulated conductor and the arc extinguishing hood are sealed.

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