CN212967579U

CN212967579U - Circuit breaker closing control device and circuit breaker

Info

Publication number: CN212967579U
Application number: CN202021272951.1U
Authority: CN
Inventors: 侯庆全; 张潮海
Original assignee: Wuxing Technology Shenzhen Co ltd; Xinmeidi Chengdu Technology Co ltd
Current assignee: Wuxing Technology Shenzhen Co ltd; Xinmeidi Chengdu Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-04-13
Anticipated expiration: 2030-07-02

Abstract

The utility model discloses a circuit breaker closing control device and circuit breaker, the device includes: a controller to: receiving a closing instruction, acquiring a zero crossing point moment of current working voltage, determining a target time period according to the zero crossing point moment, calculating closing action duration of a closing mechanism according to the current working voltage, determining closing starting moment according to the target time period and the closing action duration, and controlling the closing mechanism to start executing closing action at the closing starting moment so as to complete a contact arc discharge process in the closing action within the target time period; and the closing mechanism is connected with the controller and is used for executing closing action. The utility model discloses can guarantee that closing mechanism realizes closing a floodgate in the low-voltage section that is close to zero crossing moment for be in the low dropout state between the contact when closing a floodgate, reduce the contact and draw the arc loss.

Description

Circuit breaker closing control device and circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field especially relates to a circuit breaker combined floodgate controlling means and circuit breaker.

Background

Circuit breakers are common circuit protection devices. The existing circuit breaker adopts a motor-driven gear set matching operation mechanism to complete the switching-on function of the remote control circuit breaker, wherein the number of gear set parts is large, the driving period is long, the zero crossing point time of voltage cannot be accurately judged, arcing between contacts is easy to cause, contact damage is caused, and the service life of a remote control product is seriously influenced.

Thus, there is a need for improvements and enhancements in the art.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a circuit breaker combined floodgate controlling means and circuit breaker, aim at solving among the prior art circuit breaker combined floodgate and arouse between the contact arc that draws easily, cause the problem of contact damage.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts as follows:

the utility model provides a circuit breaker closing control device, wherein, circuit breaker closing control device includes:

a controller to: receiving a closing instruction, acquiring a zero crossing point moment of current working voltage, determining a target time period according to the zero crossing point moment, calculating closing action duration of a closing mechanism according to the current working voltage, determining closing starting moment according to the target time period and the closing action duration, and controlling the closing mechanism to start executing closing action at the closing starting moment so as to complete a contact arc discharge process in the closing action within the target time period;

the switching-on mechanism is connected with the controller and is used for executing switching-on action;

the switching-on mechanism comprises a driving mechanism and an action mechanism matched with the driving mechanism, the driving mechanism is electrically connected with the controller, and the switching-on action duration is related to the driving force of the driving mechanism.

The circuit breaker closing control device is characterized in that the driving mechanism is an electromagnetic driving mechanism.

The circuit breaker closing control device further comprises a metering chip, and the metering chip is used for identifying the zero crossing point moment in the current working voltage in an interruption mode.

The circuit breaker closing control device, wherein, actuating mechanism includes:

the contact actuating mechanism is used for driving the electric contact to move so as to realize contact separation or contact;

the operating piece is connected with the contact actuating mechanism and used for driving the contact actuating mechanism;

the first connecting rod is rotationally connected with the main shaft, and one end of the first connecting rod is in transmission connection with the operating piece;

the driving mechanism is used for driving the first connecting rod to rotate so as to drive the operating piece.

The circuit breaker closing control device, wherein, actuating mechanism includes: the electromagnet is used for generating magnetic force to drive the push rod to move when the switch is switched on, and the push rod is used for pushing the first connecting rod to rotate.

The circuit breaker switching-on control device is characterized in that the driving mechanism further comprises a movable iron core, the push rod is connected with the movable iron core, and the movable iron core moves under the action of magnetic force generated by the electromagnet during switching-on so as to drive the push rod to move.

The circuit breaker closing control device is characterized in that a first transmission part is arranged on the first connecting rod, a second transmission part is arranged on the operating part, and the first transmission part and the second transmission part are matched to realize transmission between the first connecting rod and the operating part.

The circuit breaker closing control device is characterized in that the first transmission part is a first gear, the second transmission part is a second gear, and the first gear is meshed with the second gear.

The circuit breaker closing control device is characterized in that the contact actuating mechanism is connected with the operating part through a connecting rod, and two ends of the connecting rod are respectively connected with the operating part and the contact actuating mechanism in a rotating mode.

A circuit breaker, wherein, circuit breaker includes the circuit breaker closing control device of any one of above-mentioned scheme.

The utility model has the advantages that: the utility model discloses a circuit breaker closing control device includes: the circuit breaker closing control device includes: a controller to: receiving a closing instruction, acquiring a zero crossing point moment of current working voltage, determining a target time period according to the zero crossing point moment, calculating closing action duration of a closing mechanism according to the current working voltage, determining closing starting moment according to the target time period and the closing action duration, and controlling the closing mechanism to start executing closing action at the closing starting moment so as to complete a contact arc discharge process in the closing action within the target time period; the switching-on mechanism is connected with the controller and is used for executing switching-on action; the closing mechanism comprises a driving mechanism and an action mechanism, the driving mechanism is an electromagnetic driving mechanism, the electromagnetic driving mechanism is electrically connected with the controller, and the closing action duration is related to the driving force of the electromagnetic driving mechanism. The utility model discloses can guarantee that closing mechanism realizes closing a floodgate in the low-voltage section that is close to zero crossing moment for be in the low dropout state between the contact when closing a floodgate, reduce the harm that draws the arc to produce.

Drawings

Fig. 1 is a functional schematic diagram of an embodiment of the switching-on control device of the circuit breaker of the present invention.

Fig. 2 is a schematic diagram of an operating voltage waveform in an embodiment of a circuit breaker closing control apparatus according to the present disclosure;

fig. 3 is a schematic view of an overall structure of an embodiment of a closing mechanism in a closing control device of a circuit breaker;

fig. 4 is a schematic view of an overall structure of an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 5 is a schematic structural diagram of a driving mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 6 is a schematic view of the overall structure of an embodiment of a closing mechanism in the closing control device of the circuit breaker according to the present invention;

fig. 7 is a first schematic structural diagram of a contact actuating mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 8 is a schematic structural diagram of a contact actuating mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 9 is a schematic view of a connection structure between an operating element and a contact actuating mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 10 is a first schematic structural diagram of a contact actuating mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker in an open state according to the present invention;

fig. 11 is a second schematic structural diagram of a contact actuating mechanism in an embodiment of a closing mechanism in a closing control device of a circuit breaker in an open state;

fig. 12 is a first schematic structural diagram of an overall structure of a first abutting surface and a second abutting surface of an embodiment of a closing mechanism in a closing control device of a circuit breaker, the first abutting surface and the second abutting surface being converted from an abutting state to a disengaged state;

fig. 13 is a second schematic structural diagram of an embodiment of a closing mechanism in a closing control device of a circuit breaker, where the first abutting surface and the second abutting surface are transformed from an abutting state to a disengaged state;

fig. 14 is a schematic diagram of an opening driving mechanism driving an opening in an embodiment of a closing mechanism in a closing control device of a circuit breaker according to the present invention;

fig. 15 is a schematic view illustrating an operation principle of the second elastic member in an embodiment of a closing mechanism in a closing control device of a circuit breaker.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model provides a circuit breaker closing control device, specifically, as shown in fig. 1, the device includes:

the controller 1000 is configured to receive a closing instruction, obtain a zero-crossing point time of a current working voltage, determine a target time period according to the zero-crossing point time, calculate a closing action duration of a closing mechanism according to the current working voltage, determine a closing start time according to the target time period and the closing action duration, and control the closing mechanism to start to execute a closing action at the closing start time, so that a contact arc discharge process in the closing action is completed within the target time period;

a closing mechanism 2000, wherein the closing mechanism 2000 is connected to the controller 1000, and is configured to perform a closing operation;

in this embodiment, the closing mechanism 2000 includes a driving mechanism 400 and an action mechanism 2100, and the driving mechanism 2100 is configured to provide a driving force to drive the action mechanism 400 to enable the action mechanism 2100 to drive the electrical contact to be contacted and opened, so as to implement closing. The closing action duration is the duration required from the start of providing the driving force by the driving mechanism 400 to the end of closing, the closing action duration is related to the driving force of the driving mechanism 400, and when the driving force is larger, the action of the action mechanism is faster, and the closing action duration is shorter. In this embodiment, the driving mechanism is an electromagnetic driving mechanism, the driving force is an electromagnetic force, when a closing operation is performed, the electromagnetic driving mechanism generates an electromagnetic force after being powered on, the electromagnetic force drives the operating mechanism 400 to start operating, the magnitude of the electromagnetic force of the electromagnetic driving mechanism is related to a voltage applied to the electromagnetic driving mechanism, the voltage applied to the electromagnetic driving mechanism is an operating voltage of the circuit breaker, and in practical application, although an operating rated voltage of the circuit breaker is 220V, an actual operating voltage of the circuit breaker fluctuates, therefore, in this embodiment, a correspondence relationship between the operating voltage and a closing operation duration of the closing mechanism 2000 is pre-established, and after the closing instruction is received, the closing operation duration corresponding to a current operating voltage is obtained according to the correspondence relationship. The corresponding relation between the working voltage and the closing action duration can be obtained through a preset experiment.

During specific implementation, this embodiment includes the following steps when realizing breaker closing control:

step S100, a controller receives a closing instruction, obtains a zero crossing point moment of current working voltage, and determines a target time period according to the zero crossing point moment, wherein the closing instruction is a switching-off instruction or a closing instruction, and the target time period is a time period corresponding to a preset voltage value range taking the zero crossing point moment as a center in a waveform of the current working voltage;

s200, calculating the closing action duration of a closing mechanism by a controller according to the current working voltage;

step S300, determining a closing starting time according to the target time interval and the closing action duration, and controlling the closing mechanism to start executing the closing action at the closing starting time so as to complete a contact arc discharge process in the closing action within the target time interval.

In an implementation, the circuit breaker closing control device further includes a metering Chip, specifically, the metering Chip is a System-on-a-Chip (SOC) Chip dedicated for metering, and in an implementation, the model of the metering Chip in this embodiment can be selected from RN8211 models, etc., as long as the operating voltage of the circuit breaker can be analyzed, so that the Chip at the zero crossing point time of the operating voltage of the circuit breaker can be applied. The metering chip is used for identifying the zero crossing point time in the current working voltage in an interruption mode, and the processor receives the zero crossing point time identified by the metering chip in an internal interruption mode, so that the controller does not request the metering chip to acquire the zero crossing point time after receiving the closing instruction, and the control initiative is improved.

As shown in fig. 2, the zero-crossing point time of the operating voltage is a time corresponding to a point intersecting the time axis in the waveform diagram of the operating voltage (e.g., point T0 in fig. 2). The target time interval is a time interval corresponding to a preset voltage value range taking a zero-crossing point moment as a center in the waveform of the current working voltage, as shown in part a of fig. 2, the preset voltage value range is between adjacent peaks and troughs, the preset voltage value range can be determined according to the closing action time of the circuit breaker, for example (-30V, 30V) or (-20V, 20V), etc., it can be easily seen that, with respect to the portion b including the peak and the valley, the voltage value of the corresponding operating voltage in the period is small, in the embodiment, the contact arcing process in the control closing action is completed in the time period, therefore, in the switching-on process of the electric contact, the electric contact is in a low-voltage difference state or even a zero-voltage difference state, the arc discharge of the electric contact is small, the damage of the arc discharge to the electric contact is reduced, and the service life of the circuit breaker is prolonged.

The closing action duration comprises contact static duration, contact non-arc-discharge movement duration and contact arc-discharge movement duration, in the closing action process, a certain time is needed for a mechanism to drive the action of a contact, namely, in the closing action process, a front part contact is kept static, a rear part contact starts to move until the closing action is finished, in the closing action process, the duration that the contact is kept static is called as the contact static duration, and the duration that the contact is in a motion state is divided into two parts: the contact non-arcing movement time length and the contact arcing movement time length, specifically, when the distance between the electric contacts is in a certain range, arcing can be generated between the electric contacts, and beyond the range, arcing can not be generated between the electric contacts, the distance range of arcing generated between the electric contacts is related to the voltage between the electric contacts, the time length of arcing generated between the contacts when the electric contacts move is called the electrical contact arcing movement time length, the time length of no arcing generated between the contacts when the electric contacts move is called the electrical contact non-arcing movement time length, the contact static time length, the contact non-arc-discharge movement time length and the contact arc-discharge movement time length can be obtained through the prior experiment or calculation, after the current working voltage is obtained, the contact static time length, the contact non-arcing movement time length and the contact arcing movement time length can be obtained, the determining the switching-on starting time according to the target time interval and the switching-on action duration comprises:

s311, determining a closing control delay time length according to the closing action time length, wherein the sum of half of the contact movement arc discharge time length, the contact movement non-arc discharge time length, the contact static time length and the closing control delay time length is an integral multiple of 1/2 sine cycle waves of the current working voltage;

and S312, determining the closing starting time according to the target time interval and the closing control delay time, so that the closing and arc-drawing starting time is after the starting time of the target time interval, and the closing and arc-drawing ending time is before the ending time of the target time interval, wherein the interval between the closing starting time and the appointed zero-crossing time of the current voltage is the closing control delay time.

And arc discharge starts to be generated between the contacts at the closing arc discharge starting moment, and arc discharge does not occur at the closing arc discharge ending moment, namely, the closing arc discharge starting moment is the time length of arc discharge movement of the contacts at the interval between the closing arc discharge starting moment and the closing arc discharge ending moment. As shown in fig. 2, of intersection points T1, T2 and T3 of the straight line and the horizontal axis in fig. 2, point T3 is the closing start time, point T1 is the closing and arcing start time, point T2 is the closing and arcing end time, and the interval between point T1 and point T2 is the contact arcing movement time length. The value of the closing control delay time can be obtained according to the closing action time and the waveform period of the current working voltage, and the closing control delay time is shown as part c in fig. 2. After the closing control delay time length is acquired, determining the closing starting time, so that the closing arc starting time is after the starting time of the target time period, and the closing arc ending time is before the ending time of the target time period, that is, the contact arc ending process is completed within the preset time period. It should be noted that, the closing arc start time may be after the start time of the target time period, and the closing arc end time may be before the end time of the target time period, in this embodiment, in order to accurately detect the closing start time, an interval between the closing start time and a specified zero-crossing point time of the current voltage is set as the closing control delay time length, the specified zero-crossing point time is a first zero-crossing point time after the action instruction is received, that is, closing is started after the closing control delay time length elapses from the zero-crossing point time, and it is obvious from the foregoing description that, therefore, closing is started after the closing control delay time length elapses from the zero-crossing point time, so that half of the contact movement time length can be at the zero-crossing point time, the pressure difference between the contacts during the movement of the contacts is effectively reduced, and the arcing loss of the contacts is low.

In this embodiment, the circuit breaker closing control device further includes a timer 3000, the timer 3000 is connected to the controller, the timer 3000 is configured to start timing at a first zero-crossing point after receiving the closing instruction, and a timing duration of the timer is the closing control delay duration.

In practical application, the separating brake of circuit breaker probably is because faults such as short circuit, load overload lead to, and under this condition, the circuit breaker of forced control closes a floodgate for the circuit is switched on again, can cause the circuit breaker to separate the floodgate once more and lead to the damage of consumer even, consequently, when there is the load unusual, need not carry out the circuit breaker action of closing a floodgate after having got rid of the trouble of circuit, the utility model discloses an in one embodiment, still include load return circuit detection module, load return circuit detection module is used for detecting whether there is load unusual in the circuit, when there is the load unusual, the controller does not control closing mechanism 2000 carries out the action of closing a floodgate.

In an embodiment of the present invention, as shown in fig. 3-4 (fig. 4 is a view obtained by hiding the first link 300 and the driving mechanism 400 in fig. 3), the actuating mechanism 2100 includes: the contact actuating mechanism 100 is used for driving an electrical contact to move to realize contact separation or contact, the contact actuating mechanism 100 is connected with an operating element 200, the operating element 200 includes an opening position and a closing position (as shown in fig. 3 and 6, the operating element 200 is located at the opening position in fig. 3, and the operating element 200 is located at the closing position in fig. 6), when the contact is manually closed, the operating element 200 is manually moved from the opening position to the closing position, and in the process that the operating element 200 is moved from the opening position to the closing position, the operating element 200 drives the contact actuating mechanism to execute a closing action to complete the closing. The actuating mechanism 2100 further includes a first link 300, the first link 300 is rotatably connected to the main shaft 10, that is, the first link 300 is rotatable around the main shaft 10, and one end of the first link 300 is in transmission connection with the operating element 200. The driving mechanism 400 is configured to drive the first link 300 to rotate, when the first link 300 rotates, one end of the first link 300 connected to the operating element 200 drives the operating element 200 to move, and the operating element 200 further drives the contact actuating mechanism 100 to move, so that the driving mechanism 400 can drive the contact actuating mechanism 100 to move to execute a switching-on operation without manually operating the operating element 200, thereby implementing automatic switching-on.

The contact actuating mechanism 100 may be any mechanism capable of performing a closing action, and specifically, the closing of the circuit breaker is achieved by closing an electrical contact, when the electrical contact is closed, a circuit is closed, the circuit breaker is in a closing state, when the electrical contact is separated, the circuit is cut off, the circuit breaker is in an opening state, and the contact actuating mechanism 100 is used for achieving the closing of the electrical contact to achieve the closing. In the prior art, there are a plurality of contact actuating mechanisms, and the contact actuating mechanism in the present invention may be, but is not limited to, one of a plurality of contact actuating mechanisms in the prior art.

The driving mechanism 400 includes a closing power component 410 and a push rod 420, the closing power component 410 outputs power and drives the push rod 420 to move when closing, the push rod 420 is used for pushing the first link 300 to rotate, the closing power component 410 may be a common power output component such as an electric motor, in this embodiment, as shown in fig. 5, the driving mechanism 400 includes an electromagnet 410 and a push rod 420, and when automatic closing is required, the electromagnet 410 is electrified to generate magnetic force to drive the push rod 420 to move. Specifically, the push rod 420 is connected to the movable iron core 430, the electromagnet 410 generates a magnetic force and then generates a suction force on the movable iron core 430, the movable iron core 430 moves under the action of the suction force, and the push rod 420 and the movable iron core 430 move together. Because the electromagnet generates a magnetic field at the moment of electrifying, and then generates suction to drive the push rod to move, the electromagnet is used as a driving piece for closing, the closing time can be shortened, the stay time of electric arcs between electric contacts can be shortened, and the service life of the circuit breaker can be effectively prolonged.

As shown in fig. 3, when the circuit breaker is in an open state, the electromagnet 410 is not energized, the push rod 420 is maintained at an initial position, and when an automatic closing instruction is received and automatic closing is required, the electromagnet 410 is energized to generate a magnetic force, the push rod 420 moves in the direction shown in fig. 3 and pushes the first link 300 to rotate, and the first link 300 drives the operating element 200 to move in the direction shown in fig. 3 and finally reaches a closing position (shown in fig. 6).

Further, in this embodiment, as shown in fig. 3 and 6, the mating surface 320 of the first link 300 and the push rod 420 is a cam surface, and the cam surface 320 enables the contact point of the push rod 420 and the first link 300 to gradually approach the spindle 10 in the process that the push rod 420 pushes the first link 300 to rotate, that is, in the process that the push rod 420 pushes the first link 300 to rotate, the distance between the action point of the push rod 420 on the push rod 300 and the connecting line of the spindle 10 is reduced, and since the rotating angle of the first link 300 corresponding to the opening position and the closing position of the operating element 200 is not changed, the distance between the action point of the push rod 420 on the first link 300 and the spindle 10 is reduced, and the stroke of the push rod 420 can be shortened.

Specifically, in the present embodiment, as shown in fig. 3, one end of the first link 300 is provided with a first transmission part 310, and the operating element 200 is provided with a second transmission part 210 engaged with the first transmission part 310. The first transmission part 310 and the second transmission part 210 cooperate to realize transmission between the first link 300 and the operating member 200. In a possible implementation manner, the first transmission part 310 is a first gear, the second transmission part 210 is a second gear, the first gear is engaged with the second gear, the first gear may be fixedly connected to the first link 300 after being integrally formed or separately formed, the second gear may be fixedly connected to the operating element 200 after being integrally formed or separately formed, and during the rotation of the first link 300, the first gear is engaged with the second gear, and the operating element 200 is driven to move from the opening position to the closing position by the engagement force between the first gear and the second gear. Of course, it can be understood by those skilled in the art that the first link 300 may be in transmission connection with the operating element 200 in other manners, for example, the first transmission part is a worm, the second transmission part is a worm wheel, and the first link 300 drives the operating element 200 to move through the cooperation of the worm wheel and the worm; the first link 300 and the operating member 200 may be connected by a link structure, and the first link 300 drives the operating member 200 to move through the link structure.

In a possible implementation manner, the spindle 10 is disposed between the driving mechanism 300 and the operating element 200, and further, the distance from the spindle 10 to the driving mechanism 300 is not less than the distance from the spindle 10 to the operating element, so that the pushing force of the driving mechanism 300 to the connecting rod 300 can generate a larger torque, and the operating element 200 can be driven by a smaller force, and in the case that the driving mechanism 300 includes the electromagnet 410, the volume of the electromagnet 410 can be reduced, and in the case that the closing power element 410 is an electric motor, a smaller electric motor can be used.

As shown in fig. 4, the operating element 200 and the contact actuating mechanism 100 are connected by a connecting rod 136, and two ends of the connecting rod are respectively connected with the operating element 200 and the contact actuating mechanism 200 in a rotating manner, that is, two ends of the connecting rod can respectively rotate around the operating element 200 and the contact actuating mechanism 200, so that the operating element 200 and the contact actuating mechanism can be prevented from being jammed during the process that the contact actuating mechanism 100 is driven by the connecting rod 136.

In one possible implementation, as shown in fig. 7-8, the contact actuation mechanism 100 includes: the contact actuating mechanism further includes a second transmission member 12, one end of the second transmission member 12 is provided with a third transmission portion 13, the third transmission portion 13 may be integrally formed with the second transmission member 12, or may be fixedly connected by riveting, screwing, or the like after being respectively formed, the first transmission member 11 is provided with a first abutting surface 110, the third transmission portion 13 is provided with a second abutting surface 120 (as shown in fig. 8, fig. 8 is a view in which a portion of the second transmission member 12 except the third transmission portion 13 in fig. 7 is hidden), the other end of the second transmission member 12 is provided with a first electrical contact 121, and the first electrical contact 121 is matched with a second electrical contact 122 provided in a circuit breaker where the actuating mechanism 2100 is located to cut off and connect a circuit, specifically, when the first electrical contact 121 contacts the second electrical contact 122, the circuit is closed, and the circuit breaker is in a closed state, and when the first electrical contact 121 is separated from the second electrical contact 122, the circuit is cut off, and the circuit breaker is in an open state.

As shown in fig. 9 (in fig. 9, the portion of the second transmission member 11 except the third transmission portion 13 is hidden), the third transmission portion 13 is connected to the operation member 200 through a connection rod 136, two ends of the connection rod 136 are respectively rotatably connected to the third transmission portion 13 and the operation member 200, a first hole for accommodating one end of the connection rod can be disposed on the third transmission portion 13, a second hole for accommodating the other end of the connection rod can be disposed on the operation member 200, two ends of the connection rod can be respectively rotated in the first hole and the second hole, the operation member 200 rotates around a fixed shaft during the operation of the operation member 200 moving to the opening position, the connection rod 136 moves the third transmission portion 13 along with the movement of the second hole, and the rotation of the connection rod 136 in the first hole and the second hole can prevent the operation member 200 from moving the third transmission portion 13 The seizure occurs.

The second transmission member can rotate around the main shaft 10, the main shaft 10 is provided with a first elastic member 14, the first elastic member 14 can be a spring, an elastic sheet or the like, the elastic force of the first elastic member 14 acts on the second transmission member 12, and the elastic force direction of the first elastic member 14 is a direction away from the second electrical contact 122. As shown in fig. 10-11 (fig. 11 is a view of the second transmission member 12 except for the third transmission portion 13 in fig. 10 hidden), a third stop surface 125 is provided on the second transmission member 12, when in the opening state, the first contact surface 110 and the second contact surface 120 contact each other, the third stop surface 125 contacts a stop structure provided in the circuit breaker, so that the second transmission member 12 cannot rotate continuously under the action of the first elastic member 14, the action mechanism remains stationary under the combined action of the action force of the stop mechanism on the stop surface 125, the action force between the first contact surface 110 and the second contact surface 120, the action force of the operating member 200 on the second transmission member 12, and the elastic force of the first elastic member 14 on the second transmission member 12, and the first electrical contact 121 and the second electrical contact 122 remain separated, namely, the opening state is kept unchanged. When the switch needs to be switched on, the operating element 200 moves from the switch-off position to the switch-on position to drive the third transmission part 13 to move, and the first transmission piece 11 rotates together with the second transmission piece 12 due to the abutting acting force of the first abutting surface 110 and the second abutting surface 120, so that the first electrical contact 121 is contacted with the second electrical contact 122, and the switch is switched on. During closing, the first contact surface 110 and the second contact surface 120 are kept in contact with each other, that is, the contact actuating mechanism 100 is rotated as a whole.

In a closed state, the first contact surface 110 and the second contact surface 120 are in contact with each other, the first electrical contact 121 and the second electrical contact 122 are in contact with each other, and the acting force between the first contact surface 110 and the second contact surface 120, the acting force between the first electrical contact 121 and the second electrical contact 122, the acting force between the operating element 200 and the second transmission member 12, and the elastic force of the first elastic member 14 are combined to act together, so that the operating mechanism 2100 is balanced in force, and the first transmission member 11 and the second transmission member 12 are kept relatively stationary. And the position of the second electrical contact 122 is fixed, the first electrical contact 121 and the second electrical contact 122 can maintain a contact state, that is, the circuit breaker maintains a closed state.

In a possible implementation manner, in order to make the contact between the first electrical contact 121 and the second electrical contact 122 more stable, as shown in fig. 7, the second transmission member 12 includes a second connecting rod 123 and a movable contact 124, the movable contact 124 is rotatably connected to the second connecting rod 123, specifically, a rotating shaft 1230 is disposed on the second connecting rod 123, the movable contact 124 is rotatably connected to the second connecting rod 123 through the rotating shaft 1230, the third transmission part 13 is disposed at one end of the second connecting rod 123, the first electrical contact 121 is disposed on the movable contact 124, a first stop surface 1231 is disposed on the second connecting rod 123, a second stop surface 1241 is disposed on the movable contact 124 and is matched with the first stop surface 1231, the elastic force of the first elastic member 14 acts on the movable contact 124, the rotating shaft 1230 is disposed between the elastic force acting point of the first elastic member 14 and the first electrical contact 121, in this way, when the first electrical contact 121 and the second electrical contact 122 are in contact with each other, under the elastic force of the first elastic element 14, the end of the movable contact 124, where the first electrical contact 121 is disposed, tends to rotate in the direction of the second electrical contact 122, so that the first electrical contact 121 and the second electrical contact 122 are in more reliable contact. After the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state, the second link 123 rotates under the elastic force of the first elastic member 14 and the action force of the second electrical contact 122 on the first electrical contact 121, and simultaneously the movable contact 124 rotates around the rotating shaft 1230 under the elastic force of the first elastic member 14, and after the movable contact 124 rotates around the rotating shaft 1230 for a certain angle, the first stop surface 1231 and the second stop surface 1241 contact with each other, so that the movable contact 124 can no longer rotate around the rotating shaft 1230, and at this time, the second link 123 and the movable contact 124 integrally rotate (as shown in fig. 10), so as to separate the first electrical contact 121 and the second electrical contact 122.

When the switching from the on state to the off state is required, the operating element 200 may be operated to move from the on position to the off position, and the second transmission element 12 is driven to rotate, so that the first electrical contact 121 and the second electrical contact 122 are separated, thereby implementing the switching, and when the switching is implemented by the operating element 200, the first abutting surface 110 and the second abutting surface 120 maintain the abutting state, that is, the contact actuating mechanism 100 is integrally rotated.

Further, in the present embodiment, in order to reduce the operating force of the operating member 200 driving the transmission member 13, the distance from the first electrical contact 121 on the movable contact 124 to the rotating shaft 1230 is equal to the distance from the acting point of the first elastic member 14 on the movable contact 124 to the rotating shaft 1230.

In a possible implementation manner, the contact actuating mechanism further supports automatic opening, specifically, when the first abutting surface 110 and the second abutting surface 120 are turned from the abutting state to the disengaging state (as shown in fig. 12-13, fig. 13 is a diagram of fig. 12 in which the portion of the second transmission member 12 except the third transmission part 13 is hidden), as the acting force between the first abutting surface 110 and the second abutting surface 120 disappears, the force balance between the first transmission member 11 and the second transmission member 12 is broken, the second transmission member 12 rotates under the elastic force of the first elastic member 14, so that the first electrical contact 121 and the second electrical contact 122 are separated, specifically, the elastic force acting point of the first elastic member 14 is between the first electrical contact 121 and the main shaft 10, when the second transmission member 12 rotates around the main shaft 10, one end of the first electric contact 121 moves in a direction away from the second electric contact 122, so that the first electric contact 121 and the second electric contact 122 are separated, a circuit is cut off, and the opening of the circuit breaker is realized. The first transmission member 11 is configured to receive power of a switching-off driving member to rotate so that the first abutting surface 110 and the second abutting surface 120 are converted from an abutting state to a disengaging state, as shown in fig. 14, the switching-on mechanism 2000 further includes a switching-off driving member 15, the switching-off driving member 15 is configured to drive the first transmission member 11 to rotate, so that the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state, and the switching-off driving member 15 drives the first transmission member 11 to rotate when a circuit is short-circuited, overloaded, or, the circuit breaker automatically controls the switching-off driving member 15 to drive the first transmission member 11 to rotate after receiving an external instruction under other situations requiring switching-off, thereby achieving automatic switching-off.

In a possible implementation manner, the opening driving member 15 includes an opening power member 151 and a rotating member 152, when the first driving member 11 is driven to rotate, the opening power member 151 provides power, so that the rotating member 152 collides with the first driving member 11 to rotate, a direction of an impact force of the rotating member 152 on the first driving member 11 is a direction away from the second electrical contact 122, so as to achieve separation of the first abutting surface 110 and the second abutting surface 120, specifically, the opening power member 151 may be an electromagnetic system, the electromagnetic system includes a coil winding, the coil winding generates an electromagnetic torque after being conducted so as to provide a suction force for adsorbing the rotating member 152, a reset elastic member is provided on the rotating member 152, and when opening is required, the power member 151 generates an electromagnetic torque greater than a counter torque of the armature reset elastic member, so that both ends of the rotation member 152 are rotated in the direction shown by the arrow in fig. 14 to collide with the first transmission member 11. After the rotating member 152 drives the contact actuating mechanism to complete opening, the power member 151 no longer provides power, and the rotating member 152 is reset under the action of the reset elastic member, so that the rotating member 152 can realize the next opening driving. Of course, the opening power member 151 may be another component capable of driving the rotating member 152 to rotate.

The contact operating mechanism 100 includes a second elastic member 18, and when the first abutting surface 110 and the second abutting surface 120 are switched from the abutting state to the disengaged state by the opening/closing driver 15, the elastic force of the second elastic member 18 acts on the first transmission member 11 to cause the first abutting surface 110 and the second abutting surface 120 to abut again, so that the first abutting surface 110 and the second abutting surface 120 return to the closing state while the abutting state is maintained. Specifically, the second elastic element 18 is fixedly disposed, the second elastic element 18 may be fixed to the circuit breaker or the main shaft, and the second elastic element 18 may be a spring, an elastic sheet, or the like. Fig. 15 shows an embodiment when the second elastic member 18 is a spring, as shown in fig. 15, the elastic portion of the second elastic member 18 does not contact with the first transmission member 11 when the first abutting surface 110 and the second abutting surface 120 abut, after the first transmission member 11 rotates to make the first abutting surface 110 and the second abutting surface 120 change from the abutting state to the disengaged state, the first transmission member 11 continues to rotate, at the same time, the second transmission member 12 drives the third transmission portion 13 to move, the first transmission member 11 contacts with the second elastic member 18 after rotating to a certain angle, the rotation is limited, after the second transmission member 12 rotates to a certain angle, the third transmission portion 13 contacts with the first transmission member 11 again, and the elastic force of the second elastic member 18 acts on the first transmission member 11, the friction between the first abutment surface 110 and the second abutment surface 120 is overcome, so that the first abutment surface 110 and the second abutment surface 120 abut again (as shown in fig. 10-11). When the first abutting surface 110 and the second abutting surface 120 abut against each other again, and the third stopping surface 125 contacts with a limiting structure provided on the circuit breaker, the second transmission member 12 cannot rotate continuously, and the first transmission member 11, the third transmission portion 13, and the second transmission member 12 remain relatively stationary again, so that the first electrical contact 121 and the second electrical contact 122 maintain a separated state, that is, a switching-off state. In the open state, as described above, the manual closing may be implemented by manually operating the operating element 200 or the automatic closing may be implemented by the driving mechanism 400.

Based on the above embodiment, the utility model provides a circuit breaker is still provided, the circuit breaker includes in the above-mentioned embodiment circuit breaker closing control device.

To sum up, the utility model discloses a circuit breaker combined floodgate controlling means and circuit breaker, the device includes: a controller to: receiving a closing instruction, acquiring a zero crossing point moment of current working voltage, determining a target time period according to the zero crossing point moment, calculating closing action duration of a closing mechanism according to the current working voltage, determining closing starting moment according to the target time period and the closing action duration, and controlling the closing mechanism to start executing closing action at the closing starting moment so as to complete a contact arc discharge process in the closing action within the target time period; the switching-on mechanism is connected with the controller and is used for executing switching-on action; the closing mechanism comprises a driving mechanism and an action mechanism, the driving mechanism is an electromagnetic driving mechanism, the electromagnetic driving mechanism is electrically connected with the controller, and the closing action duration is related to the driving force of the electromagnetic driving mechanism. The utility model discloses can guarantee that closing mechanism realizes closing a floodgate in the low-voltage section that is close to zero crossing moment for be in the low dropout state between the contact when closing a floodgate, reduce the arc loss that draws between the electrical contact.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a circuit breaker closing control device which characterized in that, circuit breaker closing control device includes:

a controller to: receiving a closing instruction;

the switching-on mechanism comprises a driving mechanism and an action mechanism matched with the driving mechanism, the driving mechanism is electrically connected with the controller, and the switching-on action duration of the switching-on mechanism is related to the driving force of the driving mechanism.

2. The closing control device of claim 1, wherein the driving mechanism is an electromagnetic driving mechanism.

3. The circuit breaker closing control device of claim 1, further comprising a metering chip configured to identify a zero-crossing point in the current operating voltage in an interrupt manner.

4. The circuit breaker closing control apparatus of claim 1, wherein the actuating mechanism comprises:

5. The circuit breaker closing control apparatus of claim 4, wherein the driving mechanism comprises: the electromagnet is used for generating magnetic force to drive the push rod to move when the switch is switched on, and the push rod is used for pushing the first connecting rod to rotate.

6. The circuit breaker closing control device according to claim 5, wherein the driving mechanism further includes a movable iron core, the push rod is connected to the movable iron core, and the movable iron core moves under the action of a magnetic force generated by the electromagnet during closing to drive the push rod to move.

7. The circuit breaker closing control device according to claim 4, wherein a first transmission portion is disposed on the first link, a second transmission portion is disposed on the operating member, and the first transmission portion and the second transmission portion cooperate to realize transmission between the first link and the operating member.

8. The closing control device for circuit breaker according to claim 7, wherein the first transmission part is a first gear, the second transmission part is a second gear, and the first gear and the second gear are engaged.

9. The closing control device of claim 5, wherein the contact actuating mechanism is connected to the operating member via a connecting rod, and two ends of the connecting rod are rotatably connected to the operating member and the contact actuating mechanism, respectively.

10. A circuit breaker, characterized in that it comprises a circuit breaker closing control device according to any of claims 1-9.