CN116895497A - Rebound prevention device for circuit breaker - Google Patents
Rebound prevention device for circuit breaker Download PDFInfo
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- CN116895497A CN116895497A CN202311044905.4A CN202311044905A CN116895497A CN 116895497 A CN116895497 A CN 116895497A CN 202311044905 A CN202311044905 A CN 202311044905A CN 116895497 A CN116895497 A CN 116895497A
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- pawl
- reset
- circuit breaker
- rebound
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- 230000002265 prevention Effects 0.000 title claims description 23
- 230000004907 flux Effects 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 230000009471 action Effects 0.000 claims abstract description 35
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
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- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention belongs to the technical field of electrical devices, and particularly discloses an anti-rebound device for a circuit breaker, which comprises an intelligent controller and an anti-rebound mechanism, wherein the intelligent controller and the anti-rebound mechanism are arranged in a circuit breaker body, the anti-rebound mechanism comprises a pawl base, a pawl, an inclined plane connecting rod and a magnetic flux transducer, the pawl base is fixed on the circuit breaker body, is positioned on one side of a main shaft cantilever, and is provided with a gap; the pawl is rotationally connected in the pawl base and is provided with an elastic connecting piece for limiting the rotation of the pawl; when the pawl rotates, the pawl base can be extended out to form limit fit with the main shaft cantilever; the inclined connecting rod is used for converting linear motion in the horizontal direction into rotating force of the pawl; the magnetic flux converter is connected with the inclined plane connecting rod through a magnetic flux converter resetting mechanism to drive the inclined plane connecting rod to do linear motion; the intelligent controller comprises a main magnetic flux converter which is coupled and connected with the magnetic flux converter. The invention adopts an electromagnetic structure, and compared with the traditional pure mechanical structure, the invention has quicker action and more reliability.
Description
Technical Field
The invention belongs to the technical field of electrical devices, and particularly relates to an anti-rebound device for a circuit breaker.
Background
With the rapid development of new energy under the 'double carbon' background, in order to have higher power generation efficiency in the fields of wind power generation, photovoltaic power generation and photovoltaic energy storage, the voltage level is greatly improved, and high short-circuit breaking capacity, high short-time withstand current breaker products and derivative isolating switch products under the voltage levels of AC800V, AC V and DC1500V are urgently needed; under the high voltage working condition, the circuit breaker is ensured to be unchanged in size and even miniaturized, and the mode of increasing the spring force value of the movable contact to increase the contact number of the movable contact and reduce the electric repulsive force is mostly adopted in the industry to improve the short-time withstand current, so that the contacts are prevented from being repelled when the short-time withstand current is high. In order to improve breaking capacity, the breaking force of the operating mechanism is necessarily increased, so that the breaking speed of the moving contact is increased. Most of breaker operating mechanisms are made of rigid materials, when the breaker breaks the brake, rigid material parts collide with each other under strong driving force, if the breaker does not have a reliable rebound prevention device, the rebound quantity of a moving contact can be increased, and excessive rebound can lead to rapid reduction of the effective opening distance between a moving contact and a static contact, the original effective arc striking path is destroyed, meanwhile, the intensity of insulating medium between the moving contact and the static contact is reduced, arc reburning can occur in severe cases, and the contact is burnt out, particularly, the breaker is applied to the breaker under direct current high voltage, and the burning out is a necessary result. Therefore, the rebound problem of the moving contact of the circuit breaker in the switching-off process is reliably solved, and the key and the difficult point of high short-circuit breaking capacity and high short-time tolerance current index improvement under the voltage level of AC800V, AC1140V and DC1500V are always restricted.
At present, three main measures for preventing the mechanism from rebounding are as follows: 1. the spring tension of the brake separating tension spring is increased; 2. a damping device for absorbing energy is additionally arranged on the stop shaft; 3. an anti-rebound locking hook device is adopted. However, the prior measures have respective defects, and increasing the pull force of the opening tension spring can cause the closing force of the operating mechanism to be increased, thus having obvious adverse effects on the performance of the transmission mechanism, for example, the tripping force after the closing force is increased correspondingly increases, and the friction force of each rotating and sliding matching part of the operating mechanism correspondingly increases, so that the reliability of the operating mechanism is reduced and the mechanical life is reduced; the speed of the moving contact reaching the maximum opening position can be influenced by increasing the damping device, and the breaking performance is influenced; the anti-rebound locking hook device is more applied to the high-capacity air circuit breaker, when the movable contact group rapidly reaches the opening position, the inertia locking hook is thrown to the stop shaft to lock the movable contact group due to the inertia of the inertia locking hook to prevent rebound of the movable contact group, when the movable contact group is completely stopped at the opening position, the inertia locking hook is reset under the acting force of the torsion spring so as to close the contacts, and fig. 18-1 and 18-2 can be referred to, but the movable contact group has different masses due to different contact piece numbers, the repulsive force under different currents is different, the force values of the opening tension spring, the contact spring and the reset torsion spring also have processing errors, and the comprehensive factors cause the locking hook acting by the inertia principle to have different accelerations under different current working conditions, different batches of products, different poles of products and the like, so that the locking hook cannot be hundred percent effective.
The invention aims to provide an anti-rebound device for a circuit breaker, which aims to solve or partially solve the technical problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides an anti-rebound device for a circuit breaker, which aims to solve or improve at least one of the technical problems.
To achieve the above object, the present invention provides an anti-rebound device for a circuit breaker, including an intelligent controller and an anti-rebound mechanism provided in a circuit breaker body, the anti-rebound mechanism comprising:
the pawl base is internally provided with a containing cavity, and one side of the pawl base is provided with a pawl outlet; the pawl base is fixed on the breaker body, is positioned on one side of a main shaft cantilever of the breaker and is provided with a gap;
the pawl is rotationally connected in the pawl base, and an elastic connecting piece for limiting the rotation of the pawl is arranged between the pawl and the pawl base; when the main shaft cantilever rotates, the main shaft cantilever can penetrate out of the pawl outlet to form limit fit with the main shaft cantilever;
a bevel link including a bevel portion engaged with the pawl for converting a linear motion in a horizontal direction into a rotational force of the pawl;
the magnetic flux converter is connected with the inclined connecting rod through a magnetic flux converter reset mechanism and can drive the inclined connecting rod to perform linear motion;
the intelligent controller comprises a main magnetic flux converter which is coupled with the magnetic flux converter.
Preferably, the pawl comprises a horizontal part and a vertical part, one end of the horizontal part is connected with one end of the vertical part, a connecting position is formed with a limiting end matched with the main shaft cantilever, one end of the horizontal part, which is far away from the limiting end, is provided with a first shaft hole, a second shaft connected with the pawl base in a rotating manner is connected in the first shaft hole, one end of the vertical part, which is far away from the limiting end, is provided with an inclined surface, and the inclined surface is in surface contact with an inclined surface of the inclined surface connecting rod.
Preferably, a second shaft hole is formed in the position, close to the limiting end, of the vertical portion, the second shaft hole is connected with a first shaft, and when the pawl rotates around the second shaft to a certain angle, the first shaft and the pawl base form limiting.
Preferably, the elastic connecting piece is a tension spring I, one end of the tension spring I is connected with the shaft I, and the other end of the tension spring I is connected with the pawl base.
Preferably, the magnetic flux converter reset mechanism comprises a reset connecting piece, an intelligent controller reset button, a brake wire pulling reset piece and a brake wire spring; the utility model discloses a brake cable, including the brake cable, the brake cable pulling reset piece, the brake cable, the connecting piece that resets, reset connection piece one end is connected with the arm-tie that resets, the other end has a line end roller, the line end roller with brake cable pulling reset piece face contact, and slide in one side of brake cable pulling reset piece, the arm-tie that resets is connected the inclined plane connecting rod, brake cable pulling reset piece rotates to be connected the below of intelligent control ware reset button, and with circuit breaker body elastic connection presses when the intelligent control ware reset button, brake cable pulling reset piece takes place the displacement, the line end roller is followed one side of brake cable pulling reset piece takes place to slide, works as when the intelligent control ware reset button presses to the end, the brake cable is in the effect of brake cable spring resets.
Preferably, the brake cable pulling reset piece comprises a connecting rotating shaft at the top and a reset piece body positioned below the connecting rotating shaft, wherein the reset piece body is provided with an arc-shaped sliding surface and a reset inclined surface, the arc-shaped sliding surface is an arc-shaped smooth surface, and the reset inclined surface is positioned at the opposite side of the arc-shaped sliding surface and is an inclined surface which is inclined downwards.
Preferably, the reset connection member is a brake cable.
Preferably, the reset connecting piece is an electromagnet, and the electromagnet is connected with the reset pulling plate through a steel wire.
Preferably, a tension spring II is connected between the brake wire pulling reset piece and the breaker body.
Preferably, the gap between the pawl base and the main shaft cantilever is 1mm.
Preferably, a pressure spring for completing the overrunning characteristic is arranged between the magnetic flux converter and the inclined connecting rod, and the pressure spring enables the pawl to complete the action before the main shaft cantilever in the opening process of the circuit breaker.
Compared with the traditional rebound prevention locking hook device, the rebound prevention device for the circuit breaker has the following technical effects: the rebound prevention device is controlled by the intelligent controller and the magnetic flux converter, adopts an electromagnetic structure, and has quicker and more reliable action compared with the traditional pure mechanical structure; the rebound prevention device has an overrun characteristic, and can complete the action and be ready in place before the movable contact is opened in place; the rebound prevention device of the invention also comprises a reset mechanism, which can quickly and conveniently separate the pawl from the main shaft cantilever after the brake separating action is completed, and reset the pawl into the pawl base, so that the breaker can normally close and separate the brake.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only embodiments of the invention and that other drawings can be obtained according to the drawings provided without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an anti-rebound device for a circuit breaker according to an embodiment of the present invention;
FIG. 2 is a schematic view of an anti-rebound mechanism according to an embodiment of the present invention;
FIG. 3 is an internal block diagram of an anti-rebound mechanism in one embodiment of the present invention;
FIG. 4 is a rear view of FIG. 3;
FIG. 5 is an internal block diagram of an anti-rebound mechanism according to another embodiment of the present invention;
FIG. 6-1 is an internal structural diagram of the intelligent controller (when the intelligent control reset button is sprung up);
FIG. 6-2 is an internal structure diagram of the intelligent controller (when the intelligent control reset button is pressed);
fig. 6-3 are internal structure diagrams of the intelligent controller (after the intelligent control reset button is pressed);
FIG. 7 is a schematic diagram of a brake cable pulling reset member according to an embodiment of the present invention;
FIG. 8 is a diagram showing the relationship between the brake cable pulling reset member and the brake cable according to the embodiment of the present invention;
FIG. 9 is a schematic view of a pawl base in an embodiment of the present invention;
FIG. 10 is a cross-sectional view of a pawl base in an embodiment of the present invention;
FIG. 11 is a schematic view of the pawl in accordance with an embodiment of the present invention;
fig. 12 is a front view of fig. 11;
FIG. 13 is a front view of a beveled connecting rod in accordance with an embodiment of the present invention;
fig. 14 is a diagram of the positional relationship between the main shaft cantilever and the pawl when the circuit breaker is closed;
FIG. 15 is an internal schematic view of the anti-rebound mechanism after actuation;
FIG. 16 is an external schematic view of the anti-rebound mechanism after actuation;
FIG. 17 is a diagram showing the relationship between the spindle cantilever and the pawl when the breaker breaks out of the gate;
FIG. 18-1 is a schematic diagram of a prior art anti-bouncing latch device in which the spindle cantilever is not in rigid contact with the front latch;
FIG. 18-2 is a schematic view of a prior art anti-bouncing latch device in which the latch is actuated after rigid contact of the spindle cantilever has occurred;
FIG. 19 is a schematic diagram of the operation of the intelligent controller and the flux transformer according to an embodiment of the present invention;
FIG. 20 is a schematic diagram showing the comparison operation timing of the conventional anti-rebound hook device and the anti-rebound device according to the present embodiment.
FIG. 21 is a diagram of the brake cable and the cycle of operation of the brake cable pulling reset.
Wherein: 1. an intelligent controller; 2. an anti-rebound mechanism; 3. a mechanism side plate; 4. a base sealing plate; 5. a pawl base; 6. a pawl; 7. a gate line; 8. a first shaft; 9. a second shaft; 10. resetting the pulling plate; 11. a pressure spring; 12. an inclined plane connecting rod; 13. a magnetic flux transformer; 14. a tension spring I; 15. an intelligent control reset button; 16. a spindle cantilever; 17. the brake cable pulls the reset piece; 18. a tension spring II; 19. a brake wire spring; 20. an electromagnet; 21. and (5) locking a hook.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The rebound prevention apparatus for a circuit breaker according to the present invention will be described with reference to fig. 1 to 21.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of an anti-rebound device for a circuit breaker, provided by the invention, wherein the anti-rebound device is arranged in the circuit breaker and is used for preventing rebound of a moving contact when an operating mechanism of the circuit breaker is opened, and the anti-rebound device is particularly suitable for a universal circuit breaker, and comprises an intelligent controller 1 and an anti-rebound mechanism 2 which are arranged in a circuit breaker body, wherein the anti-rebound mechanism 2 comprises a pawl 6, a pawl base 5, a magnetic flux converter 13, a bevel connecting rod 12, a reset pull plate 10 and a magnetic flux converter reset mechanism, and the intelligent controller 1 comprises a main magnetic flux converter and is coupled and connected with the magnetic flux converter 13 in the anti-rebound mechanism 2.
Specifically, the pawl base 5 is located at one side of the mechanism side plate 3 of the breaker operating mechanism, is matched with and positioned with a hole on the mechanism side plate 3, and is fixed with the mechanism side plate 3 through a screw, a gap is reserved between the side surface of the pawl base 5 and the main shaft cantilever 16, the gap is about 1mm, if the side surface of the pawl base 5 is tightly attached to the side surface of the main shaft cantilever 16, interference is likely to occur between the side surface of the pawl base 5 and the main shaft cantilever 16 to influence the action of the main shaft, and if the distance between the side surface of the pawl base and the main shaft cantilever 16 is too large, the stroke of the pawl 6 entering the hole of the main shaft cantilever 16 is likely to be too large, so that the pawl 6 can not clamp the main shaft cantilever 16. The tail of the pawl 6 is of a joint structure and is used for being matched with the groove of the pawl base 5 to rotate, the joint at the tail of the pawl 6 is propped in the groove of the pawl base 5, the locating shaft penetrates through the limiting pawl 6 from the hole of the pawl base 5, the joint structure is matched with the limiting pawl because the main shaft cantilever 16 is large in impact when rebounding, the impact resistance of the joint structure is high, and the pawl 6 cannot normally rotate due to the fact that deformation cannot occur under huge impact. The pawl 6 is connected with the pawl base 5 through a tension spring, specifically a tension spring I14, and the tension spring I14 in the middle of the pawl 6 and the pawl base 5 can ensure that the upper surface of the pawl 6 is flush with the pawl base 5 during resetting, so that the normal action of the main shaft cantilever 16 is not influenced. The second shaft 9 penetrates through holes in the pawl base 5 and the pawl 6 to limit the pawl 6, and the first shaft 8 penetrates through the pawl base 5 and the first tension spring 14 to fix the first tension spring 14. When the circuit breaker is in a normal state, the surface of the pawl 6 is flush with the surface of the pawl base 5, so that the normal closing and opening of the circuit breaker can not be influenced. The pawl 6 is connected with the magnetic flux transducer 13 through the inclined connecting rod 12, and when the breaker fails, the intelligent controller 1 sends out an action signal and simultaneously drives the main magnetic flux transducer in the intelligent controller 1 and the magnetic flux transducer 13 in the anti-rebound mechanism 2 to act. The magnetic flux transformer 13 operates to push the inclined link 12, and pushes the pawl 6 through the inclined link 12, so that the pawl 6 is pushed out of the pawl base 5.
The bevel connection rod 12 connects the pawl 6 and the magnetic flux transformer 13, and when the circuit breaker is in a normal state, the magnetic flux transformer 13 and the bevel connection rod 12 are positioned as shown in fig. 4, at this time, the pawl 6 does not protrude, and the main shaft cantilever 16 can freely rotate. The base sealing plate 4 at the bottom of the pawl base 5 and the pawl base 5 form a shell of the rebound prevention mechanism 2, the inclined surface connecting rod 12 slides on a boss of the base sealing plate 4, and the base sealing plate 4 is used for bearing a reaction force generated when the inclined surface connecting rod 12 pushes the pawl 6.
As shown in fig. 6-1, the magnetic flux transformer resetting mechanism comprises a brake cable 7, a brake cable pulling resetting piece 17 and a brake cable spring 19; one end of the brake cable 7 is connected with the reset pulling plate 10, the other free end is provided with a wire end roller, the wire end roller is in surface contact with the brake cable pulling reset piece 17, the brake cable pulling reset piece 17 slides on the arc sliding surface side, the side surface of the brake cable pulling reset piece 17 is connected with a tension spring II 18, and the other end of the tension spring II 18 is connected with the breaker body.
When the circuit breaker has a short circuit fault, the magnetic flux transducer 13 which acts simultaneously with the main magnetic flux transducer in the intelligent controller 1 starts to act, the magnetic flux transducer 13 pushes the inclined surface connecting rod 12 leftwards, the tail end inclined surface of the inclined surface connecting rod 12 is in contact fit with the lower end inclined surface of the pawl 6, and the pawl 6 rotates around the shaft II 9 to extend out of the pawl base 5 under the pushing of the inclined surface connecting rod 12.
Simultaneously, the operating mechanism starts to execute the brake separating operation under the control of the intelligent controller 1, the main shaft cantilever 16 starts to rotate from the position of fig. 14, the pawl 6 is tightly attached to the main shaft cantilever 16 but cannot enter the hole of the main shaft cantilever 16 before the main shaft cantilever 16 does not rotate to the position of fig. 17, and at the moment, the overrunning characteristic of the pawl 6 is ensured by the pressure spring 11 between the magnetic flux converter 13 and the inclined plane connecting rod 12. The compression spring 11 is compressed in the action stroke of the rear two thirds of the magnetic flux converter 13, the magnetic flux converter 13 does not fail to release due to the rebound force of the compression spring 11, the compression spring 11 is in a compressed state before the pawl 6 does not enter the hole of the main shaft cantilever 16, and the spring force acts on the inclined plane connecting rod 12, so that the pawl 6 is always in a pre-ejection state. When the spindle boom 16 is rotated to the position of fig. 17, the pawl 6 springs into the hole of the spindle boom 16 and locks it, ensuring that the spindle boom 16 cannot rebound. The pawl 6 of the rebound prevention mechanism 2 is positioned as shown in fig. 15 and 16.
After the opening action is completed, the intelligent control reset button 15 of the intelligent controller 1 pops up, at this time, the operating mechanism cannot execute the closing action, and the spindle cantilever 16 cannot rotate due to the clamping of the pawl 6. When the intelligent control reset button 15 is pressed, the brake line pulling reset piece 17 starts to move downwards along with the pressing of the intelligent control reset button 15, the line end roller of the brake line 7 pulls leftwards along the arc sliding surface of the brake line pulling reset piece 17, the brake line spring 19 starts to compress, when the line end roller of the brake line 7 moves to the top end of the arc sliding surface of the brake line pulling reset piece 17, as shown in fig. 6-2, the brake line 7 reaches the maximum stroke, the other end of the brake line 7 is connected with the reset pull plate 10, and the reset pull plate 10 pulls the inclined plane connecting rod 12 and the ejector rod of the magnetic flux converter 13 under the traction of the brake line 7 along with the pulling of the brake line 7, so that the magnetic flux converter 13 is reset. The intelligent control reset button 15 and the brake cable pulling reset piece 17 continue to move downwards, the roller at the end of the brake cable 7 passes through the highest point of the arc sliding surface of the brake cable pulling reset piece 17, and passes through the notch of the brake cable pulling reset piece 17 under the pulling force of the brake cable spring 19 to finish reset, as shown in fig. 6-3, the length of the brake cable 7 is restored to the length state of the brake cable 7 in fig. 15, and thus the magnetic flux converter 13 can be ensured not to be subjected to the resistance of the brake cable 7 when the action is released. The pawl 6 is pulled out of the hole of the main shaft cantilever 16 under the tension of the tension spring I14, the rebound prevention mechanism 2 is restored to the state shown in fig. 2 and 4, the operating mechanism is restored to the normal state, and the breaker can be opened or closed at will. The sequence of the brake cable 7 and the brake cable pulling reset member 17 throughout the cycle of operation is shown in fig. 21.
When the breaker fails again, the intelligent control reset button 15 and the brake cable pulling reset piece 17 spring upwards, and the intelligent control reset button and the brake cable pulling reset piece return to the position of fig. 6-1 under the pulling force of the tension spring II 18, namely the initial position of the brake cable 7 pulling cycle. The purpose of this structural design is to guarantee that once pressing intelligent control reset button 15, brake cable 7 pulling once and reset, has accomplished the reset action of assurance magnetic flow transducer 13, also can not influence magnetic flow transducer 13's next release.
Further, as shown in fig. 5, in other embodiments, the magnetic flux transformer 13 is configured by using an electromagnet 20 instead of the brake cable 7, where the electromagnet 20 is connected to the reset pull plate 10 by a wire, and the wire is in clearance fit with the hole of the reset pull plate 10 as in the above embodiment. When the intelligent controller CPU sends out the action signal of the magnetic flux converter, the action signal of the electromagnet 20 is sent out after the action signal of the magnetic flux converter is delayed for 1s (at the moment, the operation mechanism has completed the brake-separating action and the rebound prevention device has completed the action), the electromagnet 20 is operated once and reset, and the reset action of the magnetic flux converter 13 is ensured, and the next release of the magnetic flux converter 13 is not influenced.
Referring to fig. 19, fig. 19 shows a schematic diagram of the operation of the intelligent controller and the magnetic flux converter. The operation principle of the embodiment of the invention is as follows:
the main magnetic flux converter acts to push the push plate, the push plate toggles a brake separating and tripping half shaft of the operating mechanism, the brake separating and tripping half shaft is turned over, the mechanism is tripped, the four connecting rods are changed into five connecting rods, the moving contact group of the circuit breaker starts to conduct brake separating action, and the moving contact starts to rebound when the brake separating is carried out to the maximum opening distance. The matching of the pawl action and the main shaft cantilever action affects whether the rebound prevention mechanism can successfully prevent the rebound of the moving contact group, so the spring between the magnetic flux converter and the inclined connecting rod is used for matching the pawl action inconsistent with the main shaft cantilever action.
When the main shaft cantilever rotates from a closing position to a separating position, the magnetic flux transducer finishes the action, the pawl is pushed out of the pawl base and is tightly attached to the main shaft cantilever, and when the hole of the main shaft cantilever moves to the top end position of the pawl, the pawl is clamped into the hole of the main shaft cantilever, so that the main shaft cantilever can only move towards the separating direction, and the bouncing of the main shaft cantilever after the main shaft cantilever collides with the stopping shaft is limited. After the brake separating action is finished, the pawl is still locked on the main shaft cantilever, the intelligent control reset button pops up, the normal state of the circuit breaker needs to be restored, the intelligent control reset button is pressed down, the brake wire is pulled while the reset button restores to the normal state of the intelligent controller, the brake wire pulls the reset pulling plate, the reset pulling plate enables the magnetic flux transducer to reset, the pawl resets under the pulling force of the tension spring, the pawl is separated from a hole of the main shaft cantilever, the pawl returns to the pawl base again and is flush with the surface of the base, and at the moment, the circuit breaker can normally close and separate the brake. In the process that the intelligent control reset button is pressed to the bottom, the brake cable can be pulled and automatically reset to prepare for the next pulling, so that the brake cable can not always apply pulling force to the reset pulling plate, only the process that the intelligent control reset button is pressed can action once, and the purpose of the brake cable pulse action is not to increase resistance to the magnetic flux converter in the releasing process.
In another embodiment, as shown in fig. 5, the flux converter employs a reset alternative: the pulse electromagnet is attracted to pull the reset pulling plate, the electromagnet is released to reset after the magnetic flux converter is reset, and an electromagnet action signal is sent by an intelligent controller CPU or a remote control module to send a time lag magnetic flux converter action signal 1s.
As shown in fig. 18-1 and 18-2, fig. 18-1 shows the position of the lock hook 21 before the spindle cantilever is not rigidly contacted in the prior art anti-rebound lock hook device, and fig. 18-2 shows the position of the lock hook 21 after the spindle cantilever is rigidly contacted in the prior art anti-rebound lock hook device; the action process of the lock hook 21 is as follows: when the moving contact rapidly reaches the opening position, the lock hook 21 overcomes the force of the torsion spring due to the inertia of the lock hook, and is thrown to the stop shaft to lock the moving contact, so that the spring back is prevented, and when the moving contact is completely stopped at the opening position, the lock hook 21 is reset under the action force of the torsion spring, so that the contact is closed; the principle of the device is that the inertia action of the lock hook 21 is utilized to prevent the rebound of the moving contact, which is different from the principle of the embodiment of the invention, and the rapid action of the magnetic flux converter in the rebound prevention device of the embodiment of the invention cannot be achieved.
As shown in FIG. 20, the comparison of the conventional anti-rebound latch device with the anti-rebound mechanism according to the embodiment of the present invention shows that the present invention has a faster operation time sequence than the conventional anti-rebound latch device, and has a higher reliability than the conventional purely mechanical anti-rebound device.
Fig. 21 is a diagram showing a positional relationship between a brake cable and a brake cable pulling reset member in one cycle, wherein the arrow direction in the diagram represents pressing down the brake cable pulling reset member or the brake cable pulling reset member to pop up, fig. 1 to 4 are downward pressing processes, fig. 5 to 9 are pop up processes, wherein in fig. 4 and 5, the brake cable pulling reset member is pressed to the bottom, and fig. 9 is a schematic diagram after pop up reset.
The present invention is not limited to the conventional technical means known to those skilled in the art.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (11)
1. An anti-rebound device for a circuit breaker, comprising an intelligent controller (1) and an anti-rebound mechanism (2) arranged in a circuit breaker body, wherein the anti-rebound mechanism (2) comprises:
the pawl base (5) is internally provided with a containing cavity, and one side of the pawl base (5) is provided with a pawl outlet; the pawl base (5) is fixed on the breaker body, is positioned at one side of a main shaft cantilever (16) of the breaker and is provided with a gap;
the pawl (6) is rotationally connected in the pawl base (5), and an elastic connecting piece for limiting the rotation of the pawl is arranged between the pawl (6) and the pawl base (5); when the spindle is rotated, the spindle can penetrate out of the pawl outlet to form limit fit with the spindle cantilever (16);
a bevel link (12), the bevel link (12) comprising a bevel portion cooperating with the pawl (6) for converting a linear movement in a horizontal direction into a rotational force of the pawl (6);
the magnetic flux converter (13) is connected with the inclined connecting rod (12) through a magnetic flux converter resetting mechanism and can drive the inclined connecting rod (12) to perform linear motion;
the intelligent controller (1) comprises a main magnetic flux converter which is coupled with the magnetic flux converter (13).
2. The rebound prevention device for a circuit breaker according to claim 1, wherein the pawl (6) comprises a horizontal portion and a vertical portion, one end of the horizontal portion is connected with one end of the vertical portion, a connection position forms a limit end matched with the main shaft cantilever (16), one end of the horizontal portion, which is far away from the limit end, is provided with a first shaft hole, a second shaft (9) which is rotationally connected with the pawl base (5) is connected in the first shaft hole, one end of the vertical portion, which is far away from the limit end, is provided with an inclined surface, and the inclined surface is in surface contact with an inclined surface of the inclined surface connecting rod (12).
3. The rebound prevention device for a circuit breaker according to claim 2, wherein the vertical portion is provided with a second shaft hole near the limit end, the second shaft hole is connected with a first shaft (8), and the first shaft (8) forms a limit with the pawl base (5) when the pawl (6) rotates around the second shaft (9) to a certain angle.
4. A rebound prevention device for a circuit breaker according to claim 3, wherein the elastic connection member is a tension spring one (14), one end of the tension spring one (14) is connected to the shaft one (8), and the other end is connected to the pawl base (5).
5. The anti-rebound device for a circuit breaker of claim 1, wherein the magnetic flux transformer reset mechanism comprises a reset connection, an intelligent controller reset button (15), a brake wire pull reset (17), a brake wire spring (19); one end of the reset connecting piece is connected with a reset pulling plate (10), the other end of the reset connecting piece is provided with a wire end roller, the wire end roller is in surface contact with the brake wire pulling reset piece (17) and slides to one side of the brake wire pulling reset piece (17), the reset pulling plate (10) is connected with the inclined connecting rod (12), the brake wire pulling reset piece (17) is rotationally connected to the lower part of the intelligent controller reset button (15) and is elastically connected with the breaker body, when the intelligent controller reset button (15) is pressed, the brake wire pulling reset piece (17) is displaced, and the wire end roller slides along one side of the brake wire pulling reset piece (17); when the reset button (15) of the intelligent controller is pressed to the bottom, the brake cable (7) is reset under the action of the force of the brake cable spring (19).
6. The rebound prevention device for a circuit breaker according to claim 5, wherein the brake wire pulling reset member (17) comprises a connection rotating shaft at the top, a reset member body located below the connection rotating shaft, the reset member body having an arc sliding surface and a reset inclined surface, the arc sliding surface being an arc smooth surface, the reset inclined surface being located at the opposite side of the arc sliding surface and being an inclined downward inclined surface.
7. The anti-rebound device for a circuit breaker according to claim 5, characterized in that the return connection is a brake cable (7).
8. The rebound prevention device for a circuit breaker according to claim 5, wherein the reset connection is an electromagnet (20), the electromagnet (12) being connected with the reset pull plate (10) by a wire.
9. The rebound prevention device for a circuit breaker according to claim 5, wherein a tension spring two (18) is connected between the brake wire pulling reset member (17) and the circuit breaker body.
10. Rebound prevention device for a circuit breaker according to claim 1, characterized in that the pawl base (5) is 1mm clear of the spindle cantilever (16).
11. Rebound prevention device for a circuit breaker according to claim, characterized in that a compression spring (11) is arranged between the magnetic flux transformer (13) and the bevel connection rod (12), which compression spring (11) causes the pawl (6) to perform an action prior to the main shaft cantilever (16) during the opening of the circuit breaker.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311044905.4A CN116895497B (en) | 2023-08-18 | 2023-08-18 | Rebound prevention device for circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311044905.4A CN116895497B (en) | 2023-08-18 | 2023-08-18 | Rebound prevention device for circuit breaker |
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| CN116895497A true CN116895497A (en) | 2023-10-17 |
| CN116895497B CN116895497B (en) | 2024-03-08 |
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| CN202311044905.4A Active CN116895497B (en) | 2023-08-18 | 2023-08-18 | Rebound prevention device for circuit breaker |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135135A (en) * | 1977-07-20 | 1979-01-16 | Gould Inc. | Resilient anti-rebound latch for circuit breaker contacts |
| CN109411247A (en) * | 2017-08-18 | 2019-03-01 | 日立电梯（中国）有限公司 | A kind of switch resilience-proof device |
| CN109427504A (en) * | 2017-08-23 | 2019-03-05 | 上海电器股份有限公司人民电器厂 | A kind of electromagnetic type anti-rebounding device and the breaker with adjusting opening velocity function |
| CN112201550A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN112201549A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN112201548A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
-
2023
- 2023-08-18 CN CN202311044905.4A patent/CN116895497B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135135A (en) * | 1977-07-20 | 1979-01-16 | Gould Inc. | Resilient anti-rebound latch for circuit breaker contacts |
| CN109411247A (en) * | 2017-08-18 | 2019-03-01 | 日立电梯（中国）有限公司 | A kind of switch resilience-proof device |
| CN109427504A (en) * | 2017-08-23 | 2019-03-05 | 上海电器股份有限公司人民电器厂 | A kind of electromagnetic type anti-rebounding device and the breaker with adjusting opening velocity function |
| CN112201550A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN112201549A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN112201548A (en) * | 2020-10-23 | 2021-01-08 | 上海正泰智能科技有限公司 | Circuit breaker |
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| Publication number | Publication date |
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| CN116895497B (en) | 2024-03-08 |
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