Circuit breaker arc extinguishing device and circuit breaker

Abstract

The utility model relates to the technical field of electrical equipment, in particular to a circuit breaker arc extinguishing device and a circuit breaker. The circuit breaker arc extinguishing device comprises a mounting substrate, an air storage part, an air injection part rotating part and an air injection part lifting part. The air storage part is arranged on the mounting base plate, at least two air cavities are formed in the air storage part, an air injection part is arranged at the top of the air storage part, an air injection channel, a first communicating hole and a second communicating hole are formed in the air injection part, and a preset angle is formed between the first communicating hole and the second communicating hole. The air-jet rotating part is used for driving the air-jet part to rotate by a preset angle. The air injection piece lifting component is used for driving the air injection piece to move up and down. The circuit breaker arc extinguishing device provided by the utility model can complete arc extinguishing and air injection strategies of different air injection sequences, can cope with arcs of different intensities, ensures that the air injection piece can complete arc extinguishing tasks on the premise of safety and reliability, and improves the arc extinguishing efficiency of the air injection piece at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an arc extinguishing device for a circuit breaker and a circuit breaker. Background Art

[0002] A circuit breaker is an electrical device used to control and protect circuits. Its main functions include closing, carrying and breaking current under normal circuit conditions, and closing, carrying and breaking current under abnormal circuit conditions within a specified time. When a circuit breaker breaks current, an arc will be generated, so measures need to be taken to extinguish the arc.

[0003] At present, the gas arc extinguishing strategy in circuit breakers is mainly physical and chemical arc extinguishing method, which uses some arc extinguishing substances, such as arc extinguishing oil. When an arc is generated, the arc extinguishing oil quickly evaporates to form arc extinguishing gas, thereby extinguishing the arc. However, the arc extinguishing gas used in this method is mainly a single gas, and its arc extinguishing strategy is single. It is impossible to flexibly select the corresponding arc extinguishing strategy for arcs of different intensities, thereby reducing the arc extinguishing efficiency and increasing the safety risk and difficulty of arc extinguishing. Utility Model Content

[0004] In order to solve the defects of the prior art, the utility model provides a circuit breaker arc extinguishing device and a circuit breaker, which can complete arc extinguishing jet strategies with different jet sequences. In addition, when facing arcs of different strengths, different arc extinguishing jet strategies can be selected, so that the jet component can spray corresponding arc extinguishing gas to cope with arcs of different strengths, ensuring that the jet component can complete the arc extinguishing task under the premise of safety and reliability, while improving the arc extinguishing efficiency of the jet component.

[0005] In order to solve the above technical problems, the utility model provides an arc extinguishing device for a circuit breaker, comprising:

[0006] Install the base plate;

[0007] An air storage member is arranged on the mounting substrate, the air storage member is formed with at least two air cavities, any two adjacent air cavities are independent of each other, and each of the air cavities is provided with at least one air outlet; an air injection member is arranged on the top of the air storage member, and an air injection channel, a first connecting hole and a second connecting hole are formed inside the air injection member, the first connecting hole and the second connecting hole are both connected to the air injection channel, and a preset angle is formed between the first connecting hole and the second connecting hole;

[0008] a jet component rotating component, rotatably connected to the jet component, and used to drive the jet component to rotate the preset angle so that the jet component switches between a first jet state and a second jet state; wherein, in the first jet state, the first communicating hole is successively connected to one of the air cavities and the other of the air cavities; and in the second jet state, the second communicating hole is successively connected to the other of the air cavities and one of the air cavities;

[0009] The jet component lifting component is used to drive the jet component to move up and down.

[0010] Wherein, a mounting hole is provided on the top of the air storage component, the injection component is inserted into the mounting hole, and a plurality of air outlets are formed on the side walls of the mounting hole. Among any three air outlets arranged in sequence, the first air outlet and the third air outlet are connected to one of the air cavities, and the second air outlet is connected to the other air cavity; the height difference between any two adjacent air outlets is equal.

[0011] Wherein, a plurality of sealing members are arranged on the side wall of the jetting member and the side wall of the mounting hole, and each of the sealing members is arranged between two adjacent air outlets.

[0012] Wherein, the jet component rotating component includes a driving member and a transmission assembly, the driving member is arranged on the mounting base plate, the driving member is rotationally connected to the transmission assembly, the transmission assembly is rotationally connected to the jet component, and the driving member is suitable for rotating the preset angle to switch the jet component between the first jet state and the second jet state.

[0013] Wherein, the driving member is an adjusting knob, the adjusting knob is arranged outside the mounting substrate, and the adjusting knob penetrates the mounting substrate;

[0014] One of the adjusting knob and the mounting substrate is formed with two first positioning marks, and the other of the adjusting knob and the mounting substrate is formed with a second positioning mark, the preset angle is formed between the two first positioning marks, in the first jet state, one of the first positioning marks is aligned with the second positioning mark, and in the second jet state, the other of the first positioning marks is aligned with the second positioning mark.

[0015] Wherein, the jet lifting component comprises:

[0016] A driving assembly, arranged on the mounting substrate;

[0017] A lifting rod, the middle portion of which is rotatably connected to the mounting base, the first end of which is connected to the jet component, the second end of which is connected to the driving assembly, and the driving assembly is suitable for driving the second end of the lifting rod to rotate so that the first end of the lifting rod drives the jet component to be lifted to a predetermined height.

[0018] Wherein, the driving component comprises:

[0019] A driving wheel, rotatably connected to the mounting base plate;

[0020] The periphery of the driving wheel is provided with at least one outer convex portion, and the second end of the lifting rod is provided with an arc boss, and the outer convex portion is suitable for abutting against the arc boss to rotate the second end of the lifting rod.

[0021] Wherein, the driving component further comprises:

[0022] A switch key, wherein a first end of the switch key is inserted through the mounting substrate, and the first end of the switch key is arranged outside the mounting substrate;

[0023] A double-layer gear, rotatably arranged on the mounting base, the double-layer gear is provided with a primary gear tooth and a secondary gear tooth, the primary gear tooth and the secondary gear tooth have a rotation center coaxially, a rack is formed on the side of the switch key facing the double-layer gear, the rack is meshed with the primary gear tooth, and a transmission gear tooth is provided at the rotation center of the driving wheel, the transmission gear tooth is meshed with the secondary gear tooth;

[0024] A reset elastic member, wherein a first end of the reset elastic member is fixed to the mounting substrate, and a second end of the reset elastic member is connected to a second end of the switch key.

[0025] Wherein, the double-layer gear is rotationally connected to the mounting base plate via a rotating shaft, and the double-layer gear rotates unidirectionally along a preset direction;

[0026] The rotating shaft is formed with a first notch, the opening direction of the first notch is the same as the preset direction, and the rotating shaft hole of the double-layer gear is formed with a plurality of second notches, the opening direction of the second notches is opposite to the preset direction;

[0027] The first notch is provided with a locking piece, and the locking piece is suitable for abutting against one of the second notches to fixedly connect the rotating shaft with the double-layer gear.

[0028] Correspondingly, the utility model further provides a circuit breaker, comprising a housing and any one of the above-mentioned circuit breaker arc extinguishing devices, wherein the mounting substrate is arranged on the housing.

[0029] The implementation of this utility model has the following beneficial effects:

[0030] The circuit breaker arc extinguishing device provided by the utility model drives the jet component to switch between the first jet state and the second jet state through the jet component rotating component, switches the connection relationship between the first connecting hole, the second connecting hole and the air cavity, thereby changing the gas sequence when the jet component sprays different gases, so that the jet component can complete the arc extinguishing jet strategy with different jet sequences. Furthermore, when facing arcs of different intensities, different arc extinguishing jet strategies can be selected, so that the jet component sprays corresponding arc extinguishing gases to cope with arcs of different intensities, ensuring that the jet component can complete the arc extinguishing task under the premise of safety and reliability, while improving the arc extinguishing efficiency of the jet component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the arc extinguishing device of the circuit breaker of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the jetting component of the utility model;

[0033] Figure 3 This is one of the cross-sectional structural schematic diagrams of the gas storage component of the utility model, wherein the gas injection component is in the first gas injection state;

[0034] Figure 4 It is one of the flow path diagrams of the gas in the gas storage member of the utility model, wherein the first communication hole is connected with the first air hole;

[0035] Figure 5 This is the second flow path diagram of the gas in the gas storage member of the utility model, wherein the first connecting hole is connected with the second gas hole;

[0036] Figure 6 This is the second schematic cross-sectional view of the gas storage component of the utility model, wherein the gas injection component is in the second gas injection state;

[0037] Figure 7 This is the third flow path diagram of the gas in the gas storage member of the utility model, wherein the second communication hole is connected to the second air hole;

[0038] Figure 8 This is the fourth flow path diagram of the gas in the gas storage member of the utility model, wherein the second communication hole is connected with the first air hole;

[0039] Fig. 9 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0040] Fig.10 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0041] Fig.11It is a structural schematic diagram of the adjusting knob of the utility model;

[0042] Fig.12 It is a schematic diagram of the connection structure between the double-layer gear and the rotating shaft of the utility model. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.

[0044] The circuit breaker arc extinguishing device provided by the utility model can complete arc extinguishing jet strategies with different jet sequences. Furthermore, when facing arcs of different strengths, different arc extinguishing jet strategies can be selected, so that the jet component 23 can spray corresponding arc extinguishing gas to cope with arcs of different strengths, ensuring that the jet component 23 can complete the arc extinguishing task under the premise of safety and reliability, while improving the arc extinguishing efficiency of the jet component 23.

[0045] In one embodiment of the present invention, Figures 1 to 12 As shown, the circuit breaker arc extinguishing device includes a mounting substrate 1, a gas storage member 2, a jet member rotating member 3 and a jet member lifting member 4. The gas storage member 2 is arranged on the mounting substrate 1, and the gas storage member 2 is formed with at least two air cavities 21, and any two adjacent air cavities 21 are independent of each other, and each air cavity 21 is provided with at least one air outlet 211. A jet member 23 is arranged on the top of the gas storage member 2, and a jet channel 231, a first connecting hole 232 and a second connecting hole 233 are formed inside the jet member 23, and the first connecting hole 232 and the second connecting hole 233 are both connected to the jet channel 231, and a preset angle is formed between the first connecting hole 232 and the second connecting hole 233.

[0046] The jet component rotating part 3 is rotatably connected to the jet component 23, and the jet component rotating part 3 is used to drive the jet component 23 to rotate a preset angle, so that the jet component 23 switches between a first jet state and a second jet state, wherein in the first jet state, the first connecting hole 232 is connected to one of the air cavities 21 and the other air cavity 21 in sequence; in the second jet state, the second connecting hole 233 is connected to the other air cavity 21 and one of the air cavities 21 in sequence. The jet component lifting part 4 is used to drive the jet component 23 to move up and down.

[0047] It can be understood that, since the at least two gas cavities 21 in the gas storage member 2 are independent of each other, the gas storage member 2 can utilize the at least two gas cavities 21 to store at least two different arc-extinguishing gases.

[0048] When the circuit breaker interrupts the current, the circuit breaker needs to extinguish the arc. At this time, the jet component rotating part 3 is controlled to rotate, and the jet component 23 is switched to the first jet state. At this time, the first connecting hole 232 faces the air cavity 21, such as Figure 3 Then, the jet component 23 is lifted by the jet component lifting component 4, and the first connecting hole 232 is first connected with one of the air cavities 21, and the jet component 23 ejects the first gas in one of the air cavities 21, as shown. Figure 4 Then the jet member 23 continues to rise, the first communicating hole 232 is connected to another air cavity 21, and the jet member 23 ejects the second gas in another air cavity 21, such as Figure 5 When the jet member 23 falls, the first communicating hole 232 is first connected with the other air cavity 21, and then connected with one of the air cavities 21, so that the second gas is ejected first, and then the first gas is ejected.

[0049] That is, when the jet element 23 is in the first jet state, the jet element 23 may first jet out the first gas, then jet out the second gas, and finally jet out the first gas, thereby completing an arc extinguishing jet strategy.

[0050] When the jet member 23 is switched to the second jet state by the jet member rotating component 3, the second connecting hole 233 faces the air cavity 21. Figure 6 Then the jetting member 23 is lifted, the second connecting hole 233 is first connected with the other air cavity 21, and the jetting member 23 ejects the second gas in the other air cavity 21, as shown. Figure 7 Then continue to lift the jet member 23, so that the second communicating hole 233 is connected to one of the air cavities 21, and the jet member 23 ejects the first gas in one of the air cavities 21, such as Figure 8 When the jet member 23 falls, the second communicating hole 233 is first connected with one of the air cavities 21, and then connected with the other air cavity 21, so that the first gas is ejected first, and then the second gas is ejected.

[0051] That is, when the jet element 23 is in the second jet state, the jet element 23 may first jet the second gas, then jet the first gas, and finally jet the second gas, thereby completing another arc extinguishing jet strategy.

[0052] Therefore, the circuit breaker arc extinguishing device provided by the utility model drives the jet component 23 to switch between the first jet state and the second jet state through the jet component rotating part 3, switches the connection relationship between the first connecting hole 232, the second connecting hole 233 and the air cavity 21, thereby changing the gas sequence when the jet component 23 sprays different gases, so that the jet component 23 can complete the arc extinguishing jet strategy with different jet sequences. Then, when facing arcs of different intensities, different arc extinguishing jet strategies can be selected, so that the jet component 23 sprays corresponding arc extinguishing gases to cope with arcs of different intensities, ensuring that the jet component 23 can complete the arc extinguishing task under the premise of safety and reliability, while improving the arc extinguishing efficiency of the jet component 23.

[0053] It should be noted here that the first connecting hole 232 and the second connecting hole 233 both pass through the lower part of the jet component 23, wherein the preset angle is 90°, that is, the first connecting hole 232 and the second connecting hole 233 are perpendicular to each other, and the first connecting hole 232 and the second connecting hole 233 form a certain height difference at the lower part of the jet component 23, and the first connecting hole 232 and the second connecting hole 233 form a "cross" structure below the jet component 23 to ensure that only one of the first connecting hole 232 and the second connecting hole 233 can be connected to the air cavity 21, thereby ensuring the airtightness of the jet component 23.

[0054] It should also be noted that the gas storage member 2 is preferably a gas cylinder, and two gas cavities 21 are provided in the gas cylinder so that two different arc-extinguishing gases can be stored in the gas cylinder. Of course, the number of gas cavities 21 in the gas cylinder is not limited to two, and the number of gas cavities 21 can be set according to actual needs. The gas injection member 23 is preferably a gas nozzle.

[0055] In the embodiments of the present invention, Figures 3 to 8 As shown, a mounting hole 22 is provided on the top of the gas storage member 2 , and the jet member 23 is inserted into the mounting hole 22 to limit the moving direction of the jet member 23 and ensure that the jet member 23 moves up and down along the mounting hole 22 .

[0056] The side wall of the mounting hole 22 is formed with a plurality of air outlets 211. Among any three air outlets 211 arranged in sequence, the first air outlet 211 and the third air outlet 211 are connected to one of the air cavities 21, and the second air outlet 211 is connected to the other air cavity 21. The height difference between any two adjacent air outlets 211 is equal.

[0057] It can be understood that when the arc extinguishing device of the circuit breaker adopts the first arc extinguishing strategy to extinguish the arc, the first connecting hole 232 moves from the first air outlet 211 to the second air outlet 211, so that the first connecting hole 232 successively connects one of the air cavities 21 and the other air cavities 21. When the arc extinguishing device of the circuit breaker adopts the second arc extinguishing strategy to extinguish the arc, the second connecting hole 233 moves from the second air outlet 211 to the third air outlet 211, so that the second connecting hole 233 successively connects the other air cavity 21 and one of the air cavities 21.

[0058] At this time, the moving distance of the first connecting hole 232 in the mounting hole 22 is the distance between the first air outlet 211 and the second air outlet 211 , and the moving distance of the second connecting hole 233 in the mounting hole 22 is the distance between the second air outlet 211 and the third air outlet 211 .

[0059] Since the height difference H1 between any two adjacent air outlets 211 is equal, when the circuit breaker arc extinguishing device adopts the first arc extinguishing strategy to extinguish the arc and the second arc extinguishing strategy to extinguish the arc, the moving distance of the first connecting hole 232 in the mounting hole 22 and the moving distance of the second connecting hole 233 in the mounting hole 22 are both the height difference between the two adjacent air outlets 211. Since the height difference between any two adjacent air outlets 211 is equal, that is, the moving distance of the jet component 23 in the two arc extinguishing strategies is equal, the moving distance of the jet component 23 in different arc extinguishing strategies is fixed, and there is no need to set the moving distance of the jet component 23 according to different arc extinguishing strategies, which simplifies the operation complexity of the jet component 23 while meeting different arc extinguishing requirements.

[0060] Furthermore, a plurality of seals 24 are provided on the side walls of the jet component 23 and the side walls of the mounting hole 22, and each seal 24 is arranged between two adjacent gas outlets 211 so as to seal the two adjacent gas outlets 211 through the seal 24. When the first connecting hole 232 or the second connecting hole 233 is connected to the air cavity 21 through one of the gas outlets 211, the arc-extinguishing gas in the air cavity 21 will not be transmitted to the other gas outlet 211, thereby improving the air tightness between the two gas outlets 211 and ensuring that the two adjacent air cavities 21 are isolated and independent from each other.

[0061] In this embodiment, the sealing member 24 is a sealing ring, the inner ring of which abuts against the side wall of the injection member 23 , and the outer ring of which abuts against the side wall of the mounting hole 22 , so as to ensure the sealing effect between the injection member 23 and the mounting hole 22 .

[0062] In the embodiments of the present invention, Figure 1 and Fig. 9As shown, the jet component rotating component 3 includes a driving member 31 and a transmission assembly 32. The driving member 31 is arranged on the mounting base plate 1. The driving member 31 is rotatably connected to the transmission assembly 32. The transmission assembly 32 is rotatably connected to the jet component 23. The driving member 31 is suitable for rotating a preset angle to switch the jet component 23 between a first jet state and a second jet state.

[0063] It can be understood that when the arc intensity changes and the arc extinguishing strategy of the circuit breaker arc extinguishing device needs to be switched, the driving member 31 can be driven to rotate a preset angle, and the driving member 31 drives the transmission assembly 32 to rotate, so that the jet member 23 follows the preset rotation angle to switch the jet member 23 from the first jet state to the second jet state, and the jet member 23 is converted from connecting the air cavity 21 with the first connecting hole 232 to connecting the air cavity 21 with the second connecting hole 233, or the jet member 23 is switched from the second jet state to the second jet state, and the jet member 23 is converted from connecting the air cavity 21 with the second connecting hole 233 to connecting the air cavity 21 with the second connecting hole 233, thereby realizing the switching of different arc extinguishing strategies of the circuit breaker arc extinguishing device.

[0064] Specifically, the transmission assembly 32 includes a transmission shaft 321, a driving gear 322, and a driven gear 323. One end of the transmission shaft 321 is connected to the driving member 31, and the other end of the transmission shaft 321 is connected to the driving gear 322, the driving gear 322 is meshed with the driven gear 323, and the driven gear 323 is connected to the jet member 23, so that the rotation of the driving member 31 is transmitted to the jet member 23 through the coordinated transmission of the transmission shaft 321, the driving gear 322, and the driven gear 323, so that the driving member 31 can control the jet member 23 to perform a rotation transformation of a preset angle.

[0065] The driving member 31 is an adjusting knob, which is disposed outside the mounting substrate 1 and penetrates the mounting substrate 1 so that a user can operate the adjusting knob to rotate the internal jet member 23 .

[0066] In order to facilitate the identification of the rotation angle of the adjustment knob, Fig. 9 and Fig.11 As shown, one of the adjusting knob and the mounting substrate 1 is formed with two first positioning marks 311, and the other of the adjusting knob and the mounting substrate 1 is formed with a second positioning mark (not shown in the figure), and a preset angle is formed between the two first positioning marks 311. In the first jet state, one of the first positioning marks 311 is aligned with the second positioning mark; in the second jet state, the other first positioning mark 311 is aligned with the second positioning mark.

[0067] It can be understood that when the user uses the rotating adjustment knob to control the jet state of the jet component 23, the jet state of the jet component 23 at this time can be confirmed by the relative position and corresponding alignment state between the first positioning mark 311 and the second positioning mark, which improves the speed of identifying the rotation angle of the adjustment knob while ensuring accurate control of the rotation angle of the jet component 23, thereby accurately controlling the jet state of the jet component 23 and ensuring that the circuit breaker arc extinguishing device can implement an accurate arc extinguishing strategy.

[0068] Preferably, the first positioning mark 311 is arranged on the adjusting knob, and the second positioning mark is formed on the outer wall surface of the mounting substrate 1 .

[0069] It should be noted here that, in another embodiment, the driving member 31 may also be a driving motor, the housing of the driving motor is fixed inside the mounting base 1, and the rotating shaft of the driving motor is connected to the driving gear 322 in the transmission assembly 32, so that the driving motor rotates a preset angle to drive the transmission gear group to rotate a preset angle, thereby causing the jet member 23 to rotate and realizing the switching of the jet state of the jet member 23.

[0070] Furthermore, if Fig.11 As shown, in order to facilitate the rotation operation of the adjustment knob, an anti-slip pattern 312 is provided on the periphery of the adjustment knob to increase the friction between the adjustment knob and the user through the anti-slip pattern 312, thereby improving the convenience of rotating the adjustment knob and enhancing the user experience.

[0071] In the embodiment of the present utility model, Figure 1 and Fig.10 As shown, the jet lifting component 4 includes a driving assembly and a lifting rod 41. The driving assembly is disposed on the mounting base plate 1, the middle portion of the lifting rod 41 is rotatably connected to the mounting base plate 1, the first end of the lifting rod 41 is connected to the jet 23, the second end of the lifting rod 41 is connected to the driving assembly, and the driving assembly is adapted to drive the second end of the lifting rod 41 to rotate, so that the first end of the lifting rod 41 drives the jet 23 to lift to a predetermined height. Preferably, in this embodiment, the predetermined height is the height difference H1 between two adjacent air outlets 211.

[0072] It is understandable that when the middle part of the lifting rod 41 is rotatably connected to the mounting base plate 1, the first end of the lifting rod 41 and the second end of the lifting rod 41 form a lever structure relative to the middle part of the lifting rod 41. After the jet component rotating component 3 completes the adjustment of the jet state of the jet component 23, the driving component applies a certain torque to the second end of the lifting rod 41 by controlling the movement of the driving component, so that the second end of the lifting rod 41 rotates around the middle part of the lifting rod 41 to press the second end of the lifting rod 41 down a certain distance relative to the middle part of the lifting rod 41. At this time, the first end of the lifting rod 41 will be lifted a certain distance due to the lever effect.

[0073] Since the jet component 23 is connected to the first end of the lifting rod 41, when the first end of the lifting rod 41 is lifted, the jet component 23 follows the first end of the lifting rod 41 to rise to a predetermined height, so that the first connecting hole 232 or the second connecting hole 233 in the jet component 23 moves to a predetermined height, thereby switching the connection state between the jet component 23 and the two air cavities 21, switching the jet component 23 from being connected to one of the air cavities 21 to being connected to the other air cavity 21, thereby enabling the jet component 23 to spray out different gases in the two air cavities 21.

[0074] The driving assembly includes a driving wheel 42, which is rotatably connected to the mounting base 1. The periphery of the driving wheel 42 is provided with at least one outer protrusion 421, and the second end of the lifting rod 41 is provided with an arc boss 411, and the outer protrusion 421 is suitable for abutting against the arc boss 411 to rotate the second end of the lifting rod 41.

[0075] Then, when the driving wheel 42 rotates relative to the mounting base 1, the outer protrusion 421 of the driving wheel 42 rotates with the driving wheel 42. When the outer protrusion 421 rotates to the arc boss 411 on the lifting rod 41, the outer protrusion 421 pushes the arc boss 411 downward, so that the second end of the lifting rod 41 rotates downward, thereby driving the first end of the lifting rod 41 to move upward, completing the lifting action of the jetting member 23.

[0076] Among them, when an outer protrusion 421 is formed on the periphery of the driving wheel 42, the driving wheel 42 is a cam structure. In the process of the outer protrusion 421 contacting the arc boss 411, the outer protrusion 421 presses the arc boss 411 to press the second end of the lifting rod 41 downward and the first end of the lifting rod 41 upward, thereby completing the lifting action of the jet component 23; when the driving wheel 42 continues to rotate and the outer protrusion 421 falls off the arc boss 411, the second end of the lifting rod 41 is not pressed, the second end of the lifting rod 41 rises, and the first end of the lifting rod 41 sinks, thereby driving the jet component 23 to fall.

[0077] When a plurality of spaced convex portions 421 are formed on the periphery of the driving wheel 42, the frequency of the driving wheel 42 pressing the lifting rod 41 can be increased, thereby controlling the frequency of the lifting or falling of the jet element 23. Therefore, the rate at which the jet element 23 ejects gas can be controlled by changing the number of convex portions 421, thereby meeting the requirements for the jet rate when extinguishing arcs of different intensities and ensuring arc extinguishing efficiency.

[0078] It should be noted here that during the rotation of the driving wheel 42, the initial position when the outer protrusion 421 and the arc boss 411 begin to contact is D1, and the initial position when the outer protrusion 421 and the arc boss 411 begin to separate is D2. At this time, the vertical distance between D1 and D2 is greater than or equal to the height difference H1 between two adjacent air outlets 211, so as to ensure that when the driving wheel 42 presses the second end of the lifting rod 41, the first end of the lifting rod 41 can move from one of the air outlets 211 to another adjacent air outlet 211, thereby ensuring that the jet component 23 can spray different arc extinguishing gases to ensure the arc extinguishing efficiency of the arc.

[0079] Furthermore, the driving assembly also includes a switch key, a double-layer gear 44 and a reset elastic member 45. The first end of the switch key is inserted into the mounting substrate 1, and the first end of the switch key is located outside the mounting substrate 1. The double-layer gear 44 is provided with a primary gear 441 and a secondary gear 442, and the rotation center of the primary gear 441 and the secondary gear 442 are coaxial, and a rack 431 is formed on the side of the switch key facing the double-layer gear 44, and the rack 431 is meshed with the primary gear 441, and the rotation center of the driving wheel 42 is provided with a transmission gear 422, and the transmission gear 422 is meshed with the secondary gear 442. The first end of the reset elastic member 45 is fixed to the mounting substrate 1, and the second end of the reset elastic member 45 is connected to the second end of the switch key.

[0080] It is understandable that in this embodiment, the drive wheel 42 can be controlled to rotate by pressing the switch key 43, so that the drive wheel 42 can press the second end of the lifting rod 41 according to the pressing rhythm of the switch key, thereby controlling the jet rhythm of the jet component 23.

[0081] Specifically, after adjusting the jet state of the jet component 23, the user can press the switch key 43 to move the switch key toward the inside of the mounting substrate 1. Driven by the rack 431 below the switch key, the double-layer gear 44 is driven to rotate, thereby driving the transmission gear 422 at the rotation center of the driving wheel 42 to rotate, driving the driving wheel 42 to rotate, and then the outer convex portion 421 outside the driving wheel 42 can abut against the arc boss 411 of the lifting rod 41, so that the first end of the lifting rod 41 drives the jet component 23 to lift, thereby controlling the type of gas ejected by the jet component 23 and controlling the jet rhythm of the jet component 23.

[0082] Then, the switch key 43 can be continued to be pressed, and the transmission effect of the gear set can be used to make the outer protrusion 421 on the driving wheel 42 disengage from the arc boss 411 of the lifting rod 41, so that the second end of the lifting rod 41 is no longer subjected to force, and the first end of the lifting rod 41 gradually descends, causing the jet component 23 to fall, thereby completing the complete jet action in the arc extinguishing strategy.

[0083] It should also be noted here that the driving force for controlling the rotation of the driving wheel 42 is not limited to being applied to the driving wheel 42 through the above-mentioned structure. A driving motor can also be arranged on the mounting plate, and the rotating shaft 443 of the driving motor is connected to the driving wheel 42 to control the rotation of the driving wheel 42 through the driving motor, so that the driving wheel 42 presses down the second end of the lifting rod 41.

[0084] Furthermore, when the circuit breaker trips, the switch key is rebounded and reset by the reset elastic member 45. At this time, in order to ensure that the gear set does not produce additional wear, Fig.10 and Fig.12 As shown, the double-layer gear 44 is rotatably connected to the mounting base plate 1 via a rotating shaft 443, and the double-layer gear 44 rotates unidirectionally along a preset direction, wherein the preset direction is the rotation direction when the switch key drives the double-layer gear 44 to rotate. Fig.10 and Fig.12 As an example, when the switch key is pressed toward the inside of the mounting substrate 1, the rack 431 of the switch element moves toward the inside of the mounting substrate 1 (that is, the rack 431 moves from Figure 1 Right side Figure 1 The left side of the gear 44 is moved), thereby driving the double-layer gear 44 to rotate in the counterclockwise direction. At this time, the preset direction is the counterclockwise direction.

[0085] The rotating shaft 443 is formed with a first notch 444, and the rotating shaft hole of the double-layer gear 44 is formed with a plurality of second notches 445, wherein the opening direction of the first notch 444 is the same as the preset direction, and the opening direction of the second notch 445 is opposite to the preset direction of the double-layer gear 44. The first notch 444 is provided with a locking member 446, which is suitable for abutting against one of the second notches 445 to fix the rotating shaft 443 and the double-layer gear 44.

[0086] Furthermore, when the actual rotation direction of the bidirectional gear is different from the preset direction, the second notch 445 moves toward the locking piece 446 in the first notch 444, and the locking piece 446 is used to abut against the second notch 445, so that the double-layer gear 44 stops rotating, and the rotating shaft 443 and the double-layer gear 44 are fixedly connected so that the double-layer gear 44 cannot rotate, ensuring that the double-layer gear 44 and the transmission gear teeth 422 in the driving wheel 42 are not subjected to external forces, thereby avoiding additional wear on the gears due to the force.

[0087] It should be noted that when the circuit breaker trips and the switch key is reset by the reset elastic member 45, the switch key can be rotated to a certain angle so that the rack 431 of the switch key is temporarily disengaged from the primary gear 441 of the bidirectional gear. At this time, the locking member 446 is used to ensure that the double-layer gear 44 cannot rotate, thereby reducing the wear of the double-layer gear 44. When the switch key is reset, the switch key can be rotated back to a certain angle so that the rack 431 of the switch key can mesh with the primary gear 441 of the bidirectional gear during subsequent jetting.

[0088] Specifically, the locking member 446 is a special-shaped block, and the side of the locking member 446 facing the first notch 444 has the same shape as the first notch 444, and the side of the locking member 446 facing the second notch 445 has the same shape as the second notch 445. A compression spring 447 is provided between the locking member 446 and the first notch 444. When the second notch 445 moves toward the locking member 446 in the first notch 444, the locking member 446 can be pressed against the second notch 445 by the elastic action of the compression spring 447, so as to ensure that the rotating shaft 443 is fixedly connected to the double-layer gear 44.

[0089] Of course, the locking member 446 is not limited to being pressed against the second notch 445 by the compression spring 447 . The locking member 446 can also form a mortise and tenon connection or other connection methods with the first notch 444 and the second notch 445 to fix the rotating shaft 443 and the double-layer gear 44 .

[0090] The utility model also provides a circuit breaker, the circuit breaker comprises a housing and the circuit breaker arc extinguishing device described in any one of the above embodiments, and the mounting substrate 1 is arranged on the housing. The relay has all the beneficial effects of the circuit breaker arc extinguishing device, which will not be described in detail here.

[0091] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A circuit breaker arc extinguishing device, characterized in that: include: Install the base plate; An air storage member is arranged on the mounting substrate, the air storage member is formed with at least two air cavities, any two adjacent air cavities are independent of each other, and each of the air cavities is provided with at least one air outlet; an air injection member is arranged on the top of the air storage member, and an air injection channel, a first connecting hole and a second connecting hole are formed inside the air injection member, the first connecting hole and the second connecting hole are both connected to the air injection channel, and a preset angle is formed between the first connecting hole and the second connecting hole; a jet component rotating component, rotatably connected to the jet component, and used to drive the jet component to rotate the preset angle so that the jet component switches between a first jet state and a second jet state; wherein, in the first jet state, the first communicating hole is successively connected to one of the air cavities and the other of the air cavities; and in the second jet state, the second communicating hole is successively connected to the other of the air cavities and one of the air cavities; The jet component lifting component is used to drive the jet component to move up and down.

2. The circuit breaker arc extinguishing device according to claim 1, characterized in that: A mounting hole is provided on the top of the air storage component, the injection component is inserted into the mounting hole, and a plurality of air outlets are formed on the side walls of the mounting hole. Among any three air outlets arranged in sequence, the first air outlet and the third air outlet are connected to one of the air cavities, and the second air outlet is connected to the other air cavity; the height difference between any two adjacent air outlets is equal.

3. The circuit breaker arc extinguishing device according to claim 2, characterized in that: A plurality of sealing members are arranged on the side wall of the jetting member and the side wall of the mounting hole, and each of the sealing members is arranged between two adjacent air outlets.

4. The circuit breaker arc extinguishing device according to claim 1, characterized in that: The jet component rotating component includes a driving member and a transmission assembly, the driving member is arranged on the mounting base plate, the driving member is rotationally connected to the transmission assembly, the transmission assembly is rotationally connected to the jet component, and the driving member is suitable for rotating the preset angle to switch the jet component between the first jet state and the second jet state.

5. The circuit breaker arc extinguishing device according to claim 4, characterized in that: The driving member is an adjusting knob, the adjusting knob is arranged outside the mounting substrate, and the adjusting knob penetrates the mounting substrate; One of the adjusting knob and the mounting substrate is formed with two first positioning marks, and the other of the adjusting knob and the mounting substrate is formed with a second positioning mark, the preset angle is formed between the two first positioning marks, in the first jet state, one of the first positioning marks is aligned with the second positioning mark, and in the second jet state, the other of the first positioning marks is aligned with the second positioning mark.

6. The circuit breaker arc extinguishing device according to claim 1, characterized in that: The jet lifting component comprises: A driving assembly, arranged on the mounting substrate; A lifting rod, the middle portion of which is rotatably connected to the mounting base, the first end of which is connected to the jet component, the second end of which is connected to the driving assembly, and the driving assembly is suitable for driving the second end of the lifting rod to rotate so that the first end of the lifting rod drives the jet component to be lifted to a predetermined height.

7. The circuit breaker arc extinguishing device according to claim 6, characterized in that: The drive assembly comprises: A driving wheel, rotatably connected to the mounting base plate; The periphery of the driving wheel is provided with at least one outer convex portion, and the second end of the lifting rod is provided with an arc boss, and the outer convex portion is suitable for abutting against the arc boss to rotate the second end of the lifting rod.

8. The circuit breaker arc extinguishing device according to claim 7, characterized in that: The drive assembly also includes: A switch key, wherein a first end of the switch key is inserted through the mounting substrate, and the first end of the switch key is arranged outside the mounting substrate; A double-layer gear, rotatably arranged on the mounting base, the double-layer gear is provided with a primary gear tooth and a secondary gear tooth, the primary gear tooth and the secondary gear tooth have a rotation center coaxially, a rack is formed on the side of the switch key facing the double-layer gear, the rack is meshed with the primary gear tooth, and a transmission gear tooth is provided at the rotation center of the driving wheel, the transmission gear tooth is meshed with the secondary gear tooth; A reset elastic member, wherein a first end of the reset elastic member is fixed to the mounting substrate, and a second end of the reset elastic member is connected to a second end of the switch key.

9. The circuit breaker arc extinguishing device according to claim 8, characterized in that: The double-layer gear is rotatably connected to the mounting base plate via a rotating shaft, and the double-layer gear rotates unidirectionally along a preset direction; The rotating shaft is formed with a first notch, the opening direction of the first notch is the same as the preset direction, and the rotating shaft hole of the double-layer gear is formed with a plurality of second notches, the opening direction of the second notches is opposite to the preset direction; The first notch is provided with a locking piece, and the locking piece is suitable for abutting against one of the second notches to fix the rotating shaft and the double-layer gear.

10. A circuit breaker, characterized in that: It comprises a housing and the circuit breaker arc extinguishing device according to any one of claims 1 to 9, wherein the mounting substrate is arranged on the housing.

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