CN219553558U - Circuit breaker double-breakpoint mechanism and circuit breaker - Google Patents
Circuit breaker double-breakpoint mechanism and circuit breaker Download PDFInfo
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- CN219553558U CN219553558U CN202320351114.5U CN202320351114U CN219553558U CN 219553558 U CN219553558 U CN 219553558U CN 202320351114 U CN202320351114 U CN 202320351114U CN 219553558 U CN219553558 U CN 219553558U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model relates to the technical field of circuit breakers, in particular to a double-breakpoint mechanism of a circuit breaker and the circuit breaker. The utility model provides a circuit breaker double-breakpoint mechanism, which comprises: the device comprises a main rotating shaft, an auxiliary rotating shaft, a main arc-extinguishing chamber, an auxiliary arc-extinguishing chamber, a main fixed contact, an auxiliary fixed contact, a driving contact and an auxiliary repulsive force moving contact; main pivot and supplementary pivot all set up in the same cavity of circuit breaker, and initiative contact all corresponds the cooperation with main stationary contact and main explosion chamber, and supplementary repulsion movable contact all corresponds the cooperation with supplementary stationary contact and supplementary explosion chamber, forms to have not only improved the current-limiting ability with supplementary explosion chamber, also makes the striking simpler, and main explosion chamber is located the downside of main pivot, and supplementary explosion chamber is located the downside of supplementary pivot. Because of adopting two explosion chambers of downside and two breakpoint, every group breakpoint corresponds a set of explosion chamber for the striking effect is better, and downside arc extinguishing bars piece obtains make full use of, and two breakpoint also make the current limiting effect better, has improved the arc extinguishing effect.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a double-breakpoint mechanism of a circuit breaker and the circuit breaker.
Background
When the existing circuit breaker is provided with a single breakpoint, the arc extinguishing chamber is arranged at the lower part of the circuit breaker shell, and more arc extinguishing grid plates can be arranged because the length of the circuit breaker is larger than the height. However, because the moving contact and fixed contact of the single-break-point circuit breaker are limited in opening distance, the complicated moving contact and fixed contact arc striking structures are required to be arranged for achieving a good arc extinguishing effect in the overlong arc extinguishing chamber, and if the arc striking is not in place in the excessively complicated arc striking structure, the arc extinguishing grid sheet cannot be fully utilized, and the arc extinguishing effect is reduced.
Disclosure of Invention
The utility model aims to provide a double-breakpoint mechanism of a circuit breaker and the circuit breaker, which are used for solving the technical problem that an arc extinguishing effect is reduced due to the fact that an arc extinguishing chamber is arranged at the lower part of a circuit breaker shell of the existing circuit breaker and arc extinguishing grid plates cannot be fully utilized.
The utility model provides a double-breakpoint mechanism of a circuit breaker, which comprises the following components: the device comprises a main rotating shaft, an auxiliary rotating shaft, a main arc-extinguishing chamber, an auxiliary arc-extinguishing chamber, a main fixed contact, an auxiliary fixed contact, a driving contact and an auxiliary repulsive force moving contact;
the driving contact is connected to the main rotating shaft, the auxiliary repulsive force moving contact is connected to the auxiliary rotating shaft, the driving contact is connected with the auxiliary fixed contact through soft connection, the main rotating shaft and the auxiliary rotating shaft are arranged in the same cavity of the circuit breaker, and the main rotating shaft is connected to an operating mechanism of the circuit breaker;
the main static contact is provided with a main static contact, the auxiliary static contact is provided with an auxiliary static contact, the active contact is provided with an active contact, the auxiliary repulsive force moving contact is provided with an auxiliary repulsive force moving contact, the active contact is correspondingly matched with the main static contact and the main arc extinguishing chamber, and the auxiliary repulsive force moving contact is correspondingly matched with the auxiliary static contact and the auxiliary arc extinguishing chamber;
the main arc extinguishing chamber is positioned at the lower side of the main rotating shaft, and the auxiliary arc extinguishing chamber is positioned at the lower side of the auxiliary rotating shaft.
As a further technical scheme, the circuit breaker further comprises a repulsion tripping mechanism, the circuit breaker comprises a traction rod, when the auxiliary repulsion moving contact is repelled by short-circuit current, the traction rod is driven to rotate by the repulsion tripping mechanism, so that an operating mechanism trips, the main rotating shaft is enabled to rotate, and the driving contact is driven to break.
As a further technical scheme, the circuit breaker comprises a traction rod, and the disconnecting and disconnecting mechanism comprises a sliding rod, a pressure spring and a first auxiliary protrusion arranged on the auxiliary rotating shaft;
the first auxiliary bulge is correspondingly matched with one end of the sliding rod and is used for driving the sliding rod to slide, and the other end of the sliding rod is correspondingly matched with the traction rod and is used for driving the traction rod to overturn and trip;
the pressure spring is connected to the sliding rod and used for resetting the sliding rod.
As a further technical scheme, the device also comprises an opening driving mechanism, wherein the auxiliary repulsive force moving contact is driven to open together by the opening driving mechanism when the active contact is opened.
As a further technical scheme, the breaking driving mechanism comprises a sliding piece, a main protrusion arranged on the main rotating shaft and a second auxiliary protrusion arranged on the auxiliary rotating shaft;
the main bulge drives the sliding piece to slide through rotation, and the sliding piece drives the second auxiliary bulge to rotate through sliding.
As a further technical scheme, the sliding piece is provided with a driving groove and a driving protrusion;
the main bulge is inserted in the driving groove and can rotate in the driving groove, the main bulge drives the sliding piece to slide through the driving groove, and the sliding piece drives the second auxiliary bulge to rotate through the driving bulge.
As a further technical scheme, the main static contact is in a repulsive structure, and/or the auxiliary static contact is in a repulsive structure.
As a further technical scheme, the main static contact and the auxiliary static contact are flexible copper bars, one end of the main static contact is provided with the main static contact, and one end of the auxiliary static contact is provided with the auxiliary static contact.
As a further technical scheme, the arc-extinguishing bars in the main arc-extinguishing chamber are arranged at intervals along the left-right direction, and/or the arc-extinguishing bars in the auxiliary arc-extinguishing chamber are arranged at intervals along the left-right direction.
As a further technical scheme, the axle center of the main rotating shaft and the axle center of the auxiliary rotating shaft are positioned on the same horizontal line.
As a further technical scheme, the auxiliary repulsive force moving contact is fixedly connected to the auxiliary rotating shaft or the auxiliary repulsive force moving contact is rotatably connected to the auxiliary rotating shaft;
the auxiliary rotating shaft is provided with a rotating shaft torsion spring, and the rotating shaft torsion spring is used for enabling the auxiliary repulsive force moving contact to be communicated with the auxiliary fixed contact and providing contact pressure.
The utility model provides a circuit breaker which comprises the circuit breaker double-breakpoint mechanism.
Compared with the prior art, the circuit breaker double-breakpoint mechanism and the circuit breaker provided by the utility model have the technical advantages that:
the utility model provides a circuit breaker double-breakpoint mechanism, which comprises: the device comprises a main rotating shaft, an auxiliary rotating shaft, a main arc-extinguishing chamber, an auxiliary arc-extinguishing chamber, a main fixed contact, an auxiliary fixed contact, a driving contact and an auxiliary repulsive force moving contact; the driving contact is connected with the main rotating shaft, the auxiliary repulsive force moving contact is connected with the auxiliary rotating shaft, the driving contact is connected with the auxiliary fixed contact through soft connection, the main rotating shaft and the auxiliary rotating shaft are both arranged in the same cavity of the circuit breaker, and the main rotating shaft is connected with an operating mechanism of the circuit breaker; the main static contact is provided with a main static contact, the auxiliary static contact is provided with an auxiliary static contact, the active contact is provided with an active contact, the auxiliary repulsive force moving contact is provided with an auxiliary repulsive force moving contact, the active contact is correspondingly matched with the main static contact and the main arc extinguishing chamber, and the auxiliary repulsive force moving contact is correspondingly matched with the auxiliary static contact and the auxiliary arc extinguishing chamber; the main explosion chamber is located the downside of main pivot, and auxiliary explosion chamber is located the downside of auxiliary pivot.
Because main explosion chamber is located the downside of main pivot, and auxiliary explosion chamber is located the downside of auxiliary pivot, and initiative contact all corresponds the cooperation with main stationary contact and main explosion chamber, and auxiliary repulsion movable contact all corresponds the cooperation with auxiliary stationary contact and auxiliary explosion chamber, forms two explosion chambers and two breakpoint structures for the striking effect is better, and the arc extinguishing bars piece of main explosion chamber and the arc extinguishing bars piece of auxiliary explosion chamber all obtain make full use of, and two breakpoints also make the current limiting effect better simultaneously, have improved the arc extinguishing effect.
The circuit breaker provided by the utility model comprises the circuit breaker double-breakpoint mechanism, so that the technical advantages and effects achieved by the circuit breaker double-breakpoint mechanism comprise those achieved by the circuit breaker double-breakpoint mechanism, and the technical advantages and effects are not described in detail herein.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a structure of a double-break double-shaft under a circuit breaker according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a repulsive auxiliary fixed contact according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a release mechanism in closing according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a repulsion trip mechanism in the case of repulsion according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a switching-on/off driving mechanism in switching-on according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of an opening and closing driving mechanism during opening according to an embodiment of the present utility model.
Icon: 1-connecting plates; 2-soft coupling; 3-auxiliary repulsive force moving contact; 4-active contact; 5-auxiliary fixed contacts; 6-a main static contact; 7-an auxiliary rotating shaft; 8-a main rotating shaft; 9-a spring piece; 10-an auxiliary arc extinguishing chamber; 11-a main arc extinguishing chamber; 12-a first auxiliary projection; 13-a slide bar; 14-a compression spring; 15-a traction rod; 16-a slider; 17-a second auxiliary projection; 18-auxiliary stationary contact; 19-auxiliary repulsive force moving contact; 20-main stationary contact; 21-active contacts; 22-a drive slot; 23-driving the protrusions; 24-main protrusions.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
The specific structure is shown in fig. 1 to 6.
The embodiment provides a circuit breaker double breakpoint mechanism, including: the main rotating shaft 8, the auxiliary rotating shaft 7, the main arc extinguishing chamber 11, the auxiliary arc extinguishing chamber 10, the main fixed contact 6, the auxiliary fixed contact 5, the driving contact 4 and the auxiliary repulsive force moving contact 3; the driving contact 4 is connected to the main rotating shaft 8, the auxiliary repulsive force moving contact 3 is connected to the auxiliary rotating shaft 7, the driving contact 4 is connected with the auxiliary fixed contact 5 through the soft connection 2, the main rotating shaft 8 and the auxiliary rotating shaft 7 are both arranged in the same cavity of the circuit breaker, and the main rotating shaft 8 is connected to an operating mechanism of the circuit breaker; the main fixed contact 6 is provided with a main fixed contact 20, the auxiliary fixed contact 5 is provided with an auxiliary fixed contact 18, the active contact 4 is provided with an active contact 21, the auxiliary repulsive force moving contact 3 is provided with an auxiliary repulsive force moving contact 19, the active contact 21 is correspondingly matched with the main fixed contact 20 and the main arc-extinguishing chamber 11, and the auxiliary repulsive force moving contact 19 is correspondingly matched with the auxiliary fixed contact 18 and the auxiliary arc-extinguishing chamber 10; the main arc extinguishing chamber 11 is located at the lower side of the main rotating shaft 8, and the auxiliary arc extinguishing chamber 10 is located at the lower side of the auxiliary rotating shaft 7.
In this embodiment, because main explosion chamber 11 is located the downside of main pivot 8, auxiliary explosion chamber 10 is located the downside of auxiliary pivot 7, initiative contact 21 all corresponds the cooperation with main stationary contact 20 and main explosion chamber 11, auxiliary repulsion movable contact 19 all corresponds the cooperation with auxiliary stationary contact 18 and auxiliary explosion chamber 10, form two explosion chambers and two breakpoint structures for the striking effect is better, and the arc extinguishing bars of main explosion chamber 11 and the arc extinguishing bars of auxiliary explosion chamber 10 all obtain make full use of, and two breakpoints also make the current limiting effect better simultaneously, have improved the arc extinguishing effect.
Specifically, the auxiliary rotating shaft 8 is characterized by further comprising a connecting plate 1, wherein the connecting plate 1 is connected with an auxiliary repulsive force moving contact 3 through a soft connection 2, the auxiliary repulsive force moving contact 3 is correspondingly matched with an auxiliary fixed contact 5, the auxiliary fixed contact 5 is connected with a driving contact 4 through the soft connection 2, the driving contact 4 is correspondingly matched with a main fixed contact 6, the auxiliary fixed contact 5 is positioned on the lower side of the auxiliary rotating shaft 7, and the main fixed contact 6 is positioned on the lower side of the main rotating shaft 8. The circuit breaker is placed on the horizontal plane, the right side is upward, the back is downward, the direction of pushing the switch-on by the lever is left, the direction of pushing the switch-off by the lever is right, the main rotating shaft 8 is parallel to the auxiliary rotating shaft 7, the rotating axis direction is front and back, the length of the circuit breaker is the distance from the left end to the right end, and the height of the circuit breaker is the distance from the upper end to the lower end, namely the distance from the front side to the back.
The soft connection 2 is a soft conductor, and may be a conductor woven by copper wires, or may be a conductor formed by stacking multiple layers of copper foils, and after the auxiliary fixed contact 5 and the active contact 4 are connected through the soft connection 2, the auxiliary repulsive force moving contact 3 and the active contact 4 can rotate independently relative to their own rotation axes.
In the alternative technical scheme of this embodiment, the circuit breaker further includes a release tripping mechanism, the circuit breaker includes a traction rod 15, when the auxiliary repulsive force moving contact 3 is released through short-circuit current, the release tripping mechanism drives the traction rod 15 to rotate, so that the operating mechanism trips, thereby enabling the main rotating shaft 8 to rotate and driving the active contact 4 to break. When short-circuit current passes through, the electric power makes auxiliary repulsion moving contact 3 repel away fast, and auxiliary repulsion moving contact 3 drives traction rod 15 to complete tripping through the release tripping mechanism, and is faster than tripping action through backup protection.
The auxiliary repulsive force moving contact 3 is rapidly repelled when short-circuit current is generated, and the electric power generated by the short-circuit current is used as force for pushing the auxiliary repulsive force moving contact 3 to rapidly act. There are two types of electromotive forces, one is an electromotive repulsive force generated between contacts, and the other is a repulsive force generated between parallel conductors. When the sum of the two is larger than the contact pressure, the contact is repelled by the electric force. When the contact is separated, an arc appears, and the short-circuit current is limited to rise by the rapid increase of the arc resistance. However, since the speed of the operating mechanism for tripping by the tripping device is slower than the repulsion speed of the auxiliary repulsive force moving contact 3, if the auxiliary repulsive force moving contact 3 falls down due to the reduction of the electrodynamic force before the active contact 4 is disconnected by the tripping device, the circuit is switched on again, fusion welding can occur on the auxiliary repulsive force moving contact 3, and after fusion welding, the auxiliary repulsive force moving contact 3 and the corresponding auxiliary fixed contact 5 are welded together, the auxiliary repulsive force moving contact 3 cannot repel and lose the current limiting effect. This problem can thus be avoided by a push-out trip mechanism.
In an alternative technical solution of this embodiment, the circuit breaker includes a lever and a traction rod 15, and the release mechanism includes a slide bar 13, a compression spring 14, and a first auxiliary protrusion 12 disposed on the auxiliary rotating shaft 7;
the first auxiliary protrusion 12 is correspondingly matched with one end of the sliding rod 13 and is used for driving the sliding rod 13 to slide, and the other end of the sliding rod 13 is correspondingly matched with the traction rod 15 and is used for driving the traction rod 15 to overturn and trip;
the compression spring 14 is connected to the slide bar 13 and is used for resetting the slide bar 13.
In this embodiment, the pressure spring 14 is fixed in the circuit breaker, and the slide bar 13 wears to locate the pressure spring 14, the one end of slide bar 13 and first auxiliary bulge 12 complex is pressed in the one end of pressure spring 14, pressure spring 14 is with slide bar 13 limit in a position, when the combined floodgate, first auxiliary bulge 12 corresponds and has the interval with the one end of slide bar 13, the other end of slide bar 13 corresponds with traction lever 15, when short-circuit current passes through, auxiliary repulsion moving contact 3 is repelled, auxiliary pivot 7 rotates and drives first auxiliary bulge 12 rotation, first auxiliary bulge 12 promotes slide bar 13 slip and compression pressure spring 14, the other end of slide bar 13 and traction lever 15 cooperation drive traction lever 15 upset make the mechanism release unblock, supplementary repulsion moving contact 3 fall back and auxiliary stationary contact 5 switch-on after the release, slide bar 13 resets through pressure spring 14. The whole structure is simple, and the stability and the reliability are high. Wherein the slide bar 13 is limited by the housing of the circuit breaker so that it can move in translation.
In the alternative technical solution of this embodiment, the device further includes an opening driving mechanism, and the auxiliary repulsive force moving contact 3 is driven to open together by the opening driving mechanism when the active contact 4 opens. The switching-off driving mechanism mainly comprises that when the direct current critical current is switched off, the electric repulsive force is smaller and the auxiliary repulsive force moving contact 3 cannot be repelled off, and the switching-off driving mechanism can operate the driving contact 4 through the operating mechanism to drive the auxiliary repulsive force moving contact 3 to be switched off together.
In an alternative solution of this embodiment, the breaking driving mechanism includes a sliding member 16, a main protrusion 24 disposed on the main rotating shaft 8, and a second auxiliary protrusion 17 disposed on the auxiliary rotating shaft 7;
the main protrusion 24 drives the sliding member 16 to slide through rotation, and the sliding member 16 drives the second auxiliary protrusion 17 to rotate through sliding.
In this embodiment, when the operation mechanism is turned off, the main protrusion 24 rotates along with the main rotating shaft 8, the main protrusion 24 drives the sliding part 16 to translate while rotating, the sliding part 16 drives the second auxiliary protrusion 17 to rotate through translation so as to drive the auxiliary rotating shaft 7 to rotate, and the auxiliary rotating shaft 7 drives the auxiliary repulsive force moving contact 3 to turn off along with the driving contact 4 through rotation, so that the structure is simple and the stability is good.
In this embodiment, the first auxiliary protrusion 12 and the second auxiliary protrusion 17 may be formed as a single body, and the structure is simple and stable.
In an alternative solution of this embodiment, the sliding member 16 is provided with a driving slot 22 and a driving protrusion 23;
the main protrusion 24 is inserted into the driving slot 22 and can rotate in the driving slot 22, the main protrusion 24 drives the sliding member 16 to slide through the driving slot 22, and the sliding member 16 drives the second auxiliary protrusion 17 to rotate through the driving protrusion 23.
In this embodiment, when the switch is opened, the operating mechanism drives the main rotating shaft 8 to rotate, and meanwhile, the main protrusion 24 pushes the sliding member 16 to move rightward through the driving slot 22, the driving protrusion 23 drives the second auxiliary protrusion 17 to rotate and further drives the auxiliary rotating shaft 7 to rotate so as to open the auxiliary repulsive force moving contact 3, after the mechanism is switched on, the sliding member 16 is pushed back to the original position by the main protrusion 24 through the driving slot 22, and the auxiliary repulsive force moving contact 3 is switched on again with the auxiliary fixed contact 5 under the driving of the force of the rotating shaft torsion spring (not shown in the figure). Wherein the slide 16 can be moved in translation by a limit stop of the circuit breaker housing. The slider 16 is simple in structure and stable in sliding.
In the double-rotating-shaft double-breakpoint circuit breaker, a main rotating shaft 8 of a driving contact 4 is connected with an operating mechanism and is driven to be disconnected by the operating mechanism; the auxiliary repulsive force moving contact 3 is an independent auxiliary rotating shaft 7 and is not connected with an operating mechanism. The structure is favorable for breaking alternating current and direct current short-circuit current, but is unfavorable for breaking direct current critical current.
The short-circuit current is high current, the auxiliary repulsive force moving contact 3 is repelled in response to the short-circuit current, and the active contact 4 and the auxiliary repulsive force moving contact 3 together complete high-current breaking. Both for ac and dc arcs.
The direct current critical current is small current, and the direct current arc current is not zero crossing, so the direct current arc is difficult to extinguish compared with the alternating current arc. When the direct current critical current is cut off, the auxiliary repulsive force moving contact 3 is not separated due to insufficient electric power, and the direct current critical current is difficult to cut off by the driving contact 4 alone.
In this embodiment, after the auxiliary repulsive force moving contact 3 and the active contact 4 are installed in the same cavity, the auxiliary repulsive force moving contact 3 and the active contact 4 are simultaneously disconnected during opening or tripping after the opening driving mechanism is additionally installed, so that ac/dc versatility is achieved.
In an alternative technical scheme of the embodiment, the main fixed contact 6 is in a repulsive structure, so that the over-travel of the active contact 21 is increased when the active contact contacts with the main fixed contact, the repulsive distance is increased when the short circuit current is disconnected, and the reliability and the current limiting effect are improved; and/or the auxiliary fixed contact 5 is in a repulsive structure, so that the over-travel is increased when the auxiliary movable contact contacts the auxiliary fixed contact, the repulsive distance is increased when the short circuit current is disconnected, and the reliability and the current limiting effect are improved.
In an alternative technical solution of this embodiment, the main fixed contact 6 and the auxiliary fixed contact 5 are flexible copper bars, one end of the main fixed contact 6 is provided with the main fixed contact 20, and one end of the auxiliary fixed contact 5 is provided with the auxiliary fixed contact 18.
Specifically, the flexible copper bar includes a plurality of conductive copper sheets that range upon range of setting, the both ends of flexible copper bar compress tightly through compressing tightly technology makes it become whole, with supplementary stationary contact 5 for example explanation, the position that flexible copper bar one end was compressed tightly is provided with supplementary stationary contact 18, the position that the other end was compressed tightly is used for fixing a position on the circuit breaker, because the part between the position that both ends were compressed tightly has certain flexibility to form flexible connecting portion, when closing a floodgate, can improve the overrange for supplementary repulsion movable contact 19, when breaking short-circuit current, make supplementary stationary contact 18 can repel when receiving electric force, increase the opening distance between supplementary repulsion movable contact 19 and the supplementary stationary contact 18, and simple structure, simple process, improvement current limiting effect.
Preferably, the flexible copper bar is the form of buckling, and the compressed part at both ends is parallel, and the inside of flexible copper bar department of buckling is provided with spring piece 9, and spring piece 9 can provide the pressure towards supplementary repulsion movable contact 19 direction for supplementary stationary contact 18, promotes contact reliability, can resume the form through spring piece 9 after the flexible copper is repelled simultaneously.
In an alternative technical solution of this embodiment, arc extinguishing gate sheets arranged in a shape of ▂ are disposed in the main arc extinguishing chamber 11, and/or arc extinguishing gate sheets arranged in a shape of ▂ are disposed in the auxiliary arc extinguishing chamber 10.
Preferably, the arc-extinguishing bars in the main arc-extinguishing chamber 11 are arranged at intervals along the left-right direction, and/or the arc-extinguishing bars in the auxiliary arc-extinguishing chamber 10 are arranged at intervals along the left-right direction, i.e. are transversely arranged, so that the overall arc-extinguishing effect is improved and the structure is simple.
In an alternative technical solution of this embodiment, the axis of the main rotating shaft 8 and the axis of the auxiliary rotating shaft 7 are located on the same horizontal line and are parallel to each other, so that the volume of the circuit breaker can be reduced more effectively.
In an alternative technical solution of this embodiment, the active contact 4 is rotatably connected to the main rotating shaft 8, and the auxiliary repulsive force moving contact 3 is fixedly connected to the auxiliary rotating shaft 7 or the auxiliary repulsive force moving contact 3 is rotatably connected to the auxiliary rotating shaft 7; the auxiliary rotating shaft 7 is provided with a rotating shaft torsion spring, and the rotating shaft torsion spring is used for enabling the auxiliary repulsive force moving contact 3 to be communicated with the auxiliary fixed contact 5 and providing contact pressure.
Specifically, the auxiliary repulsive force moving contact 3 and the auxiliary rotating shaft 7 may be an integral body or may be a split body.
When the auxiliary repulsive force moving contact 3 and the auxiliary rotating shaft 7 are integrated, namely, the auxiliary repulsive force moving contact 3 and the auxiliary rotating shaft 7 cannot rotate relatively. The auxiliary repulsive force moving contact 3 and the auxiliary rotating shaft 7 may be an integral repulsive force moving contact formed by metal, or the auxiliary repulsive force moving contact 3 made of metal and the auxiliary rotating shaft 7 made of plastic are assembled into an integral body without relative rotation. The auxiliary rotating shaft 7 is provided with a rotating shaft torsion spring, and the auxiliary repulsive force moving contact 3 is communicated with the auxiliary fixed contact 5 and provides contact pressure by applying a counterclockwise rotating force to the auxiliary rotating shaft 7.
When the auxiliary repulsive force moving contact 3 and the auxiliary rotating shaft 7 are not integrated, namely, the auxiliary repulsive force moving contact 3 can relatively rotate around the auxiliary rotating shaft 7. The auxiliary rotating shaft 7 is provided with a rotating shaft torsion spring, and the auxiliary repulsive force moving contact 3 is communicated with the auxiliary fixed contact 5 by the anticlockwise rotating force of the auxiliary rotating shaft 7. The auxiliary repulsive force moving contact 3 is connected to the auxiliary rotating shaft 7 through a torsion spring, and the torsion spring provides contact pressure for the auxiliary repulsive force moving contact 3 together with the rotating shaft torsion spring when the auxiliary repulsive force moving contact 3 is communicated with the auxiliary fixed contact 5.
The circuit breaker provided in this embodiment includes the above-mentioned circuit breaker double-breakpoint mechanism, from this, the technical advantage and the effect that this circuit breaker reached include the technical advantage and the effect that above-mentioned circuit breaker double-breakpoint mechanism reached, and this is not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (12)
1. A circuit breaker double breakpoint mechanism, comprising: the device comprises a main rotating shaft (8), an auxiliary rotating shaft (7), a main arc extinguishing chamber (11), an auxiliary arc extinguishing chamber (10), a main fixed contact (6), an auxiliary fixed contact (5), a driving contact (4) and an auxiliary repulsive force moving contact (3);
the driving contact (4) is connected to the main rotating shaft (8), the auxiliary repulsive force moving contact (3) is connected to the auxiliary rotating shaft (7), the driving contact (4) is connected with the auxiliary fixed contact (5) through a soft connection (2), the main rotating shaft (8) and the auxiliary rotating shaft (7) are both arranged in the same cavity of the circuit breaker, and the main rotating shaft (8) is connected to an operating mechanism of the circuit breaker;
the main static contact (6) is provided with a main static contact (20), the auxiliary static contact (5) is provided with an auxiliary static contact (18), the active contact (4) is provided with an active contact (21), the auxiliary repulsive force moving contact (3) is provided with an auxiliary repulsive force moving contact (19), the active contact (21) is correspondingly matched with the main static contact (20) and the main arc extinguishing chamber (11), and the auxiliary repulsive force moving contact (19) is correspondingly matched with the auxiliary static contact (18) and the auxiliary arc extinguishing chamber (10);
the main arc extinguishing chamber (11) is positioned at the lower side of the main rotating shaft (8), and the auxiliary arc extinguishing chamber (10) is positioned at the lower side of the auxiliary rotating shaft (7).
2. The circuit breaker double-breakpoint mechanism according to claim 1, further comprising a repulsion tripping mechanism, wherein the circuit breaker comprises a traction rod (15), and when the auxiliary repulsion moving contact (3) is repelled by a short-circuit current, the traction rod (15) is driven to rotate by the repulsion tripping mechanism to trip the operating mechanism, so that the main rotating shaft (8) is rotated to drive the active contact (4) to break.
3. The circuit breaker double breakpoint mechanism according to claim 2, wherein the circuit breaker comprises a traction rod (15), and the disconnecting and disconnecting mechanism comprises a sliding rod (13), a pressure spring (14) and a first auxiliary protrusion (12) arranged on the auxiliary rotating shaft (7);
the first auxiliary bulge (12) is correspondingly matched with one end of the sliding rod (13) and is used for driving the sliding rod (13) to slide, and the other end of the sliding rod (13) is correspondingly matched with the traction rod (15) and is used for driving the traction rod (15) to overturn and trip;
the pressure spring (14) is connected to the sliding rod (13) and is used for resetting the sliding rod (13).
4. The circuit breaker double breakpoint mechanism according to claim 1, further comprising an opening driving mechanism, wherein the auxiliary repulsive force moving contact (3) is driven to open together by the opening driving mechanism when the active contact (4) is opened.
5. The circuit breaker double breakpoint mechanism according to claim 4, wherein the opening and closing driving mechanism comprises a slider (16), a main protrusion (24) provided on the main rotation shaft (8), and a second auxiliary protrusion (17) provided on the auxiliary rotation shaft (7);
the main protrusion (24) drives the sliding part (16) to slide through rotation, and the sliding part (16) drives the second auxiliary protrusion (17) to rotate through sliding.
6. The circuit breaker double breakpoint mechanism according to claim 5, wherein the sliding member (16) is provided with a driving groove (22) and a driving protrusion (23);
the main bulge (24) is inserted into the driving groove (22) and can rotate in the driving groove (22), the main bulge (24) drives the sliding piece (16) to slide through the driving groove (22), and the sliding piece (16) drives the second auxiliary bulge (17) to rotate through the driving bulge (23).
7. The circuit breaker double breakpoint mechanism according to claim 1, wherein the main fixed contact (6) is in a repulsive structure, and/or the auxiliary fixed contact (5) is in a repulsive structure.
8. The circuit breaker double breakpoint mechanism according to claim 7, wherein the main fixed contact (6) and the auxiliary fixed contact (5) are flexible copper bars, one end of the main fixed contact (6) is provided with the main fixed contact (20), and one end of the auxiliary fixed contact (5) is provided with the auxiliary fixed contact (18).
9. The circuit breaker double breakpoint mechanism according to claim 1, wherein the arc extinguishing bars in the main arc extinguishing chamber (11) are arranged at intervals along the left-right direction, and/or the arc extinguishing bars in the auxiliary arc extinguishing chamber (10) are arranged at intervals along the left-right direction.
10. The circuit breaker double breakpoint mechanism according to claim 1, wherein the axis of the main rotation shaft (8) and the axis of the auxiliary rotation shaft (7) are located on the same horizontal line.
11. The circuit breaker double breakpoint mechanism according to claim 1, wherein the auxiliary repulsive force moving contact (3) is fixedly connected to the auxiliary rotating shaft (7) or the auxiliary repulsive force moving contact (3) is rotatably connected to the auxiliary rotating shaft (7);
the auxiliary rotating shaft (7) is provided with a rotating shaft torsion spring, and the rotating shaft torsion spring is used for enabling the auxiliary repulsive force moving contact (3) to be communicated with the auxiliary fixed contact (5) and providing contact pressure.
12. A circuit breaker comprising a circuit breaker double breakpoint mechanism according to any of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320351114.5U CN219553558U (en) | 2023-02-28 | 2023-02-28 | Circuit breaker double-breakpoint mechanism and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320351114.5U CN219553558U (en) | 2023-02-28 | 2023-02-28 | Circuit breaker double-breakpoint mechanism and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219553558U true CN219553558U (en) | 2023-08-18 |
Family
ID=87728407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320351114.5U Active CN219553558U (en) | 2023-02-28 | 2023-02-28 | Circuit breaker double-breakpoint mechanism and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219553558U (en) |
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2023
- 2023-02-28 CN CN202320351114.5U patent/CN219553558U/en active Active
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