CN117970093A - Switching-on and switching-off position detection system of circuit breaker - Google Patents

Abstract

The invention relates to a switch-on and switch-off position detection system of a circuit breaker, which comprises a main control unit, a detection unit and a circuit breaker body, wherein the detection unit is connected with the main control unit and comprises a handle position detection switch and a free position detection switch, the circuit breaker body comprises a shell, a manual operation mechanism and an electric operation mechanism are arranged in the shell, the electric operation mechanism comprises a motor, a first circuit board and a transmission assembly, the transmission assembly comprises a mounting seat, a first shaft, a driving gear, a driven gear, a sliding sleeve and a second shaft, a first movable contact piece which rotates synchronously with the sliding sleeve is arranged on the sliding sleeve, a first movable contact is arranged on the first movable contact, and a first fixed contact, a second fixed contact and a third fixed contact are arranged on a rotating track of the sliding sleeve on the first circuit board. By adopting the technical scheme, the invention provides a switch-on and switch-off position detection system of a circuit breaker, which is additionally provided with a detection switch and can detect the switch-on and switch-off in-place condition.

Description

Switching-on and switching-off position detection system of circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a switching-on and switching-off position detection system of a circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. With the continuous development of the Internet of things and the continuous promotion of market demands, more requirements are put forward on remote signaling, remote control, fault judgment and the like of the circuit breaker.

When the breaker executes the self function, the breaker needs to perform opening and closing actions. However, in practical applications, the opening and closing of the circuit breaker may not be in place due to factors such as the control accuracy of the opening and closing and the blocking of unexpected obstacles, for example, the connecting rod of the circuit breaker does not move to an expected position. In the circuit breaker in the prior art, a switching-on/off position detection scheme is lacking, and whether the switching-on/off position is in place or not and whether the switching-on/off execution fails or not cannot be determined.

Disclosure of Invention

The purpose of the invention is that: in order to overcome the defects of the prior art, the invention provides a switching-on and switching-off position detection system of a circuit breaker, which is provided with a position detection switch, can detect the in-place condition of switching-on and switching-off, and performs position detection by a detection method so as to determine whether the position of the switching-on and switching-off is in place or whether the execution of the switching-on and switching-off fails.

The technical scheme of the invention is as follows: the switching-on and switching-off position detection system of the circuit breaker comprises a main control unit, a detection unit and a circuit breaker body, wherein the detection unit is connected with the main control unit and comprises a handle position detection switch and a free position detection switch,

The breaker body comprises a shell, a manual operation mechanism and an electric operation mechanism are arranged in the shell, the manual operation mechanism comprises a handle which is rotationally arranged on the shell, the electric operation mechanism comprises a motor and a first circuit board, the motor and the first circuit board are electrically connected with a main control unit, the motor is electrically connected with the first circuit board, the motor and the handle are linked through a transmission component, the transmission component comprises a mounting seat, a first shaft, a driving gear, a driven gear, a sliding sleeve and a second shaft, the first shaft is connected with the motor, the first shaft and the second shaft are rotationally arranged on the mounting seat and are parallel to each other, the second shaft is linked with the handle through a transmission shaft, the driving gear is arranged on the first shaft and synchronously rotates with the first shaft, the sliding sleeve is arranged on the second shaft and is matched with the second shaft through an electromagnet, the driven gear is sleeved on the periphery of the sliding sleeve and is meshed with the driving gear,

The free position detection switch comprises a first movable contact, a first fixed contact, a second fixed contact and a third fixed contact, wherein a first movable contact which rotates synchronously with the first movable contact is arranged on the sliding sleeve;

the handle position detection switch comprises a second circuit board, a fourth fixed contact arranged on the second circuit board, and a second movable contact and a third movable contact arranged on the handle, wherein the second circuit board is electrically connected with the first circuit board;

The method comprises the steps that output signals of a first fixed contact and a second movable contact are obtained at first from a main control unit, then the output signals of the second fixed contact are obtained, at the moment, the circuit breaker is in a closing state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that output signals of a third fixed contact and a third movable contact are obtained at first from a main control unit, then, output signals of a second fixed contact are obtained, at the moment, the circuit breaker is in a switching-off state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that firstly, an output signal of a first fixed contact is obtained at a main control unit, then, an output signal of a second fixed contact is obtained, and an output signal of a second movable contact is not obtained, or firstly, an output signal of a third fixed contact is obtained at the main control unit, then, an output signal of the second fixed contact is obtained, and an output signal of the third movable contact is not obtained, wherein a handle position detection switch is damaged;

when the main control unit acquires signals output by the second movable contact or the third movable contact and does not receive signals output by the first fixed contact and the third contact, the electric operating mechanism is damaged;

The main control unit does not acquire the handle position detection switch, but acquires a signal output by the second stationary contact, and at the moment, the manual operating mechanism is damaged.

By adopting the technical scheme, the motor rotates positively to drive the driving gear to rotate, the sliding sleeve is driven to rotate through the driven gear, so that the second shaft drives the transmission shaft to rotate, closing is realized, the first moving contact is in contact with the first fixed contact, a signal is output, after closing, the electromagnet does not work, the sliding sleeve is separated from the second shaft, the motor rotates reversely, the second shaft is fixed, the sliding sleeve rotates reversely, the first moving contact is in contact with the third fixed contact, the signal is output, the electromagnet works the sliding sleeve to cooperate with the second shaft during opening, the motor rotates reversely to drive the transmission shaft to rotate, opening is realized, the first moving contact is in contact with the second fixed contact, the signal is output, the second shaft is separated from the sliding sleeve after opening, the motor rotates positively, the first moving contact returns to the original position, the first moving contact is in contact with the third fixed contact, the sliding sleeve is not driven to move by opening and closing by the manual operation handle, and if no signal is output, the opening and closing is not in place.

The invention is further provided with: the detection unit further comprises an electric opening position detection switch and an electric closing position detection switch, the first circuit board comprises a first board body, a second board body and a connecting plate for connecting the first board body and the second board body, the two board bodies are oppositely arranged, the two board bodies are respectively provided with a first static contact, a second static contact and a third static contact, and the first movable contact is positioned between the two board bodies;

The electric opening position detection switch and the electric closing position detection switch both adopt reflective photoelectric switches, and comprise a transmitting tube and a receiving tube, wherein the transmitting tube is arranged on the first plate body, and the receiving tube is arranged on the second plate body;

The method is divided into two position signals, wherein one signal is provided with a shielding and the other signal is provided with no shielding;

The signal output by the electric switch-on position detection switch is blocked, the main control unit drives the motor to rotate clockwise, at the moment, the signals output by the electric switch-on position detection switch and the electric switch-off position detection switch are both unblocked, the main control unit continues to drive the motor to rotate clockwise, at the moment, the signal output by the electric switch-off position detection switch is blocked, the main control unit drives the motor to rotate anticlockwise, the first moving contact is contacted with the second fixed contact, the free position detection switch outputs a signal, and the motor is stopped;

the signal output by the electric closing position detection switch is non-shielding, the main control unit drives the motor to rotate anticlockwise, if the second static contact outputs no signal, the motor continues to rotate anticlockwise, and when the second static contact outputs a signal, the motor stops.

By adopting the further arrangement, when the free position detection switch of the handle position detection switch box is damaged, the photoelectric switch can be used for replacing the free position detection switch, and different times of motor operation can be determined through signals sent by the photoelectric switch, so that the first moving contact can return to the free position, and the detection effect is good.

Still further, the present invention provides: the shell is internally provided with a temperature sensor, the temperature sensor is electrically connected with the main control unit, when the switch is electrically opened, the switch is not opened and the switch is closed by the switch which is electrically opened, the temperature output by the temperature sensor is rapidly increased, and the switch is in contact fusion welding fault.

By adopting the further arrangement, the safety is higher, and the circuit breaker can be maintained in time.

Still further, the present invention is provided with: the sliding sleeve is characterized in that a first connecting structure is arranged between the sliding sleeve and the driven gear, the first connecting structure comprises a spring and a positioning piece, a plurality of installation cavities are formed in the inner side wall of the driven gear along the circumferential direction of the inner side wall of the driven gear, the spring and the positioning piece are arranged in each installation cavity, a plurality of positioning grooves are correspondingly formed in the sliding sleeve, and the positioning piece is clamped into the positioning grooves under the action of the spring to realize connection of the sliding sleeve and the driven gear.

By adopting the further arrangement, the device is simple in structure and convenient to install, and when the sliding sleeve is connected with the driven gear, the sliding sleeve is convenient to link with the driven gear, and the sliding sleeve is driven to rotate to realize signal transmission of opening and closing.

Still further, the present invention is provided with: the transmission assembly further comprises a normally-moving gear, a tower-shaped spring and a rotary table, wherein the driving gear comprises a sleeve, a left gear and a right gear, the left gear and the right gear are arranged at two ends of the sleeve, the normally-moving gear is meshed with the left gear, the driven gear is meshed with the right gear, a friction boss and a thread boss positioned on the right side of the friction boss are arranged on the normally-moving gear, the rotary table and the tower-shaped spring are all sleeved on the thread boss, the tower-shaped spring is positioned between the rotary table and the sliding sleeve, the sliding sleeve is in threaded fit with the thread boss, the sliding sleeve slides towards the direction of the friction boss when the motor is reversely rotated, the rotary table and the friction boss are combined into a whole through friction pressure, and accordingly the sliding sleeve is driven to rotate so as to realize opening and closing.

Adopt above-mentioned still further setting, the linkage of sliding sleeve and driven gear can't be satisfied in being connected between sliding sleeve and driven gear, and the motor reverses, because of the meshing of the left tooth on normal motion gear and the driving gear, screw thread boss and sliding sleeve screw thread cooperation, when normal motion gear rotates, the sliding sleeve slides to the carousel direction to compress the tower spring, carousel and friction boss combine in situ through frictional force, and the carousel rotates, drives the sliding sleeve and rotates, thereby the sliding sleeve realizes the divide-shut brake with first gear cooperation.

Still further, the present invention is provided with: the second shaft is connected with the transmission shaft through a second connecting structure, the second connecting structure comprises a support, a bearing seat and a bearing, wherein the bearing seat and the bearing are installed in the support, the bearing is located on the inner side of the bearing seat, a radial gap is formed between the bearing seat and the support, a containing groove is formed in the support along the circumferential direction of the support, an installation groove is correspondingly formed in the bearing seat along the circumferential direction of the support, elastic balls are arranged in the installation grooves, and the elastic balls are located in the containing groove.

By adopting the arrangement, the connection between the second shaft and the transmission shaft is facilitated, and the structure between the second shaft and the transmission shaft is firm.

Still further, the present invention is provided with: the handle comprises a rotating part and an operating part, the operating part extends out of the shell, the transmission shaft is connected with the rotating part, a second movable contact and a third movable contact are arranged on the outer side edge of the rotating part, one end of the second movable contact is riveted on the rotating part, the other end of the second movable contact is provided with a second movable contact, one end of the third movable contact is riveted on the rotating part, and the other end of the third movable contact is provided with a third movable contact.

The device is further arranged, and is simple in structure and convenient to operate.

Still further, the present invention is provided with: the rotating part is provided with a connecting hole for the rotating shaft to be inserted, the inner side wall of the connecting hole is provided with an inner spline, the rotating shaft is provided with an outer spline table, and the inner spline and the outer spline table are matched to realize linkage of the handle and the transmission shaft.

By adopting the above arrangement, the linkage between the handle and the transmission shaft is facilitated, so that the handle and the transmission shaft are firm in structure.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a logic block diagram of a detection unit of the present invention;

Fig. 3 shows a circuit breaker switching from a switching-off state to a manual switching-on state;

Fig. 4 shows the circuit breaker being switched from the closed state to the manual open state;

fig. 5 shows the circuit breaker switching from the open state to the electric closing state;

fig. 6 shows the circuit breaker being switched from the closed state to the electrically opened state;

FIG. 7 is a schematic view of the handle and housing of an embodiment of the present invention;

FIG. 8 is a schematic view of an electric operator drive assembly according to an embodiment of the present invention;

FIG. 9 is a schematic view of a transmission assembly according to an embodiment of the present invention;

FIG. 10 is a schematic view of a sliding sleeve and a positioning member according to an embodiment of the present invention;

FIG. 11 is a schematic view of a constant motion gear according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a first circuit board according to an embodiment of the invention;

FIG. 13 is a schematic view of a second connection structure according to an embodiment of the present invention;

fig. 14 is a schematic view of a handle and a second circuit board according to an embodiment of the invention.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments 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.

It should be noted that all directional indications (such as up, down, front, and rear … …) in the description of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indication is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. In the description of the present invention, "a number" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the scope of protection claimed by the present invention.

As shown in fig. 1-14, a system for detecting the opening and closing position of a circuit breaker comprises a main control unit, a detection unit and a circuit breaker body, wherein the detection unit is connected with the main control unit and comprises a handle position detection switch and a free position detection switch,

The breaker body comprises a shell 1, a manual operation mechanism 2 and an electric operation mechanism 3 are arranged in the shell 1, the manual operation mechanism 2 comprises a handle 21 which is rotatably arranged on the shell 1, the handle 21 is connected with a movable contact operation mechanism 210 in a linkage way, the movable contact operation mechanism can be controlled to switch on and switch off the breaker by rotating the handle 21, the movable contact operation mechanism is of the prior art, so that the description is not specifically expanded, the electric operation mechanism 3 comprises a motor 31, a first circuit board 32 and a transmission assembly, the motor 31 is electrically connected with the first circuit board 32, the transmission assembly comprises a mounting seat 331, a first shaft 332, a driving gear 333, a driven gear 334, a sliding sleeve 335 and a second shaft 336, the mounting seat 331 is fixedly arranged in the shell 1, a containing cavity is arranged on the mounting seat 331 corresponding to the driven gear 334, the first shaft 332 is connected with the motor 31, the first shaft 332 and the second shaft 336 are rotatably arranged on the mounting seat 331 and are arranged in parallel, the second shaft 336 is arranged on the handle 21 through a transmission shaft 4, the driving gear 333 is arranged on the first shaft 332 and the periphery of the first shaft 335, the sliding sleeve 335 is synchronously arranged on the periphery of the sliding sleeve 335, the sliding sleeve is meshed with the second shaft 336,

The free position detection switch comprises a first movable contact, a first fixed contact, a second fixed contact and a third fixed contact, wherein a first movable contact 5 which rotates synchronously with the first movable contact is arranged on the sliding sleeve 335, a first movable contact 51 is arranged on the first movable contact 5, a first fixed contact 321, a second fixed contact 322 and a third fixed contact 323 are arranged on the first circuit board 32 on the rotating track of the sliding sleeve 335, the sliding sleeve 335 rotates under the driving of the motor 31 to drive the first movable contact 51 to contact with one fixed contact, a sleeve ring is sleeved on the sliding sleeve 335, the sleeve ring is in interference fit with the sliding sleeve, and the first movable contact is arranged on the sleeve ring; the free position detection switch has three position signals corresponding to a closing signal, a free signal and a separating signal,

The handle position detection switch comprises a second circuit board 61, a fourth fixed contact arranged on the second circuit board 61, a second movable contact 63 and a third movable contact 64 arranged on the handle 21, wherein the second circuit board 61 is electrically connected with the first circuit board 32, and the second movable contact 63 and the third movable contact 64 are respectively contacted with the fourth fixed contact to detect the position of the handle 21 during opening and closing, so that the handle position detection switch has the advantages of simple structure and good detection effect; the handle position switch has three position signals corresponding to a closing signal (-1), a free signal (0) and a separating signal (1),

The method comprises the steps that output signals of a first fixed contact and a second movable contact are obtained at first from a main control unit, then the output signals of the second fixed contact are obtained, at the moment, the circuit breaker is in a closing state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that output signals of a third fixed contact and a third movable contact are obtained at first from a main control unit, then, output signals of a second fixed contact are obtained, at the moment, the circuit breaker is in a switching-off state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that firstly, an output signal of a first fixed contact is obtained at a main control unit, then, an output signal of a second fixed contact is obtained, and an output signal of a second movable contact is not obtained, or firstly, an output signal of a third fixed contact is obtained at the main control unit, then, an output signal of the second fixed contact is obtained, and an output signal of the third movable contact is not obtained, wherein a handle position detection switch is damaged;

when the main control unit acquires signals output by the second movable contact or the third movable contact and does not receive signals output by the first fixed contact and the third contact, the electric operating mechanism is damaged;

The main control unit does not acquire the handle position detection switch, but acquires a signal output by the second stationary contact, and at the moment, the manual operating mechanism is damaged.

The switching-on and switching-off state of the circuit breaker can be known in time, the circuit breaker is convenient to maintain, the motor rotates positively to drive the driving gear to rotate, the sliding sleeve is driven to rotate through the driven gear, the second shaft drives the transmission shaft to rotate, switching-on is achieved, the first moving contact is contacted with the first fixed contact, signals are output, after switching-on, the electromagnet does not work, the sliding sleeve is separated from the second shaft, the motor rotates reversely, the first moving contact is contacted with the third fixed contact, signals are output, the electromagnet works the sliding sleeve to be matched with the second shaft, the motor rotates reversely, the transmission shaft is driven to rotate, switching-off is achieved, the first moving contact is contacted with the second fixed contact, signals are output, after switching-off, the second shaft is separated from the sliding sleeve, the motor rotates positively, the first moving contact is in situ, the first moving contact is contacted with the third fixed contact, when the first output wheel is separated from the sliding sleeve, the manual operation handle is not used for switching-on, and the sliding sleeve is not driven to move, and if no signals are output, the switching-on is indicated to be not in place.

The detection unit further comprises an electric opening position detection switch and an electric closing position detection switch, the first circuit board 32 comprises a first board body 324, a second board body 325 and a connecting plate 326 for connecting the first board body 324 and the second board body 325, the two board bodies are arranged relatively, the two board bodies are provided with a first fixed contact 321, a second fixed contact 322 and a third fixed contact 323, the first movable contact 5 is arranged between the two board bodies, when the sliding sleeve 335 is matched with the second shaft 336, the first movable contact is contacted with the first fixed contact, the second fixed contact and the third fixed contact on the right side, and when the sliding sleeve is matched with the turntable, the first movable contact is contacted with the first fixed contact, the second fixed contact and the third fixed contact on the left side;

The electric opening position detection switch and the electric closing position detection switch both adopt reflective photoelectric switches, and comprise a transmitting tube and a receiving tube, wherein the transmitting tube is arranged on the first plate body 324, and the receiving tube is arranged on the second plate body 325;

The method comprises two position signals, wherein one signal is provided with a shielding (1) and the other signal is provided with no shielding (0);

As shown in fig. 2, the signal output by the electric switch-on position detection switch is blocked, the main control unit drives the motor to rotate clockwise, at the moment, the signals output by the electric switch-on position detection switch and the electric switch-off position detection switch are both non-blocked, the main control unit continues to drive the motor to rotate clockwise, at the moment, the signal output by the electric switch-off position detection switch is blocked, the main control unit drives the motor to rotate anticlockwise, the first moving contact contacts with the second fixed contact, the free position detection switch outputs a signal, and the motor stops;

The signal that electronic combined floodgate position detection switch output is not sheltered from, and main control unit drive motor anticlockwise rotation, if second static contact does not have signal output time, and the motor continues anticlockwise rotation, and when second static contact output signal, the motor stops, and when the damage appears in the free position detection switch of handle position detection switch box, can utilize photoelectric switch to replace to can confirm the different time of motor operation through the signal that photoelectric switch sent, ensure that first moving contact can return the free position, the detection effect is good.

The temperature sensor is arranged in the shell 1 and is electrically connected with the main control unit, when the switch is electrically opened, the switch is not opened, the switch is closed, the temperature output by the temperature sensor is rapidly increased, and the temperature sensor is in contact fusion welding fault at the moment, so that the safety is higher, and the circuit breaker can be maintained in time.

Be equipped with first connection structure between sliding sleeve 335 and the driven gear 334, first connection structure includes spring and setting element 7, be equipped with a plurality of installation cavities along its circumference on the inside wall of driven gear 334, each installation intracavity all is equipped with spring and setting element 7, correspond on the sliding sleeve 335 and be equipped with a plurality of constant head tanks, setting element 7 is blocked into the constant head tank under the effect of spring and is realized being connected of sliding sleeve 335 and driven gear 334, simple structure, simple to operate is convenient for link between sliding sleeve 335 and the driven gear 334 when sliding sleeve 335 is connected with driven gear 334, drives the sliding sleeve 335 and rotates the signal transmission who realizes the divide-shut brake.

The transmission assembly further comprises a normally-moving gear 337, a tower-shaped spring 338 and a rotary disc 339, wherein the drive gear 333 comprises a sleeve 3331, a left gear 3332 and a right gear 3333 which are arranged at two ends of the sleeve 3331, the normally-moving gear 337 is meshed with the left gear 3332, the driven gear 334 is meshed with the right gear 3333, a friction boss 3371 and a thread boss 3372 which is positioned on the right side of the friction boss 3371 are arranged on the normally-moving gear 337, the rotary disc 339 and the tower-shaped spring 338 are respectively sleeved on the thread boss 3372, the tower-shaped spring 338 is positioned between the rotary disc 339 and the rotary sleeve 335, the rotary sleeve 335 is in threaded fit with the thread boss 3372, when the rotary sleeve 335 is separated from the driven gear 334, and the motor 31 is in reverse rotation, the rotary sleeve 335 slides towards the direction of the friction boss 3372, the rotary sleeve 338 is compressed, the rotary disc and the friction boss 3372 is combined into a whole through friction pressure, so that after the normally-moving gear is used for a long time, the connection between the rotary sleeve and the driven gear cannot meet the linkage of the driven gear, and the motor is in reverse rotation, and the rotary sleeve is in a rotary sleeve is in rotary shaft-shaped fit with the rotary sleeve, and is in a rotary shaft fit with the rotary sleeve, and is in a rotary sleeve shape, and is in a rotary shaft with the rotary sleeve. In order to ensure that the contact between the fixed contact and the moving contact is not influenced after the sliding sleeve moves.

The second shaft 336 is connected with the transmission shaft 4 through a second connecting structure, the second connecting structure comprises a support 81, a bearing seat 82 and a bearing 83 which are installed in the support 81, the bearing seat 82 is in interference fit with the support 81, the bearing 83 is located on the inner side of the bearing seat 82, the end parts of the second shaft 336 and the transmission shaft 4 are all extended into the bearing 83, a radial gap is formed between the bearing seat 82 and the support 81, a containing groove 811 is formed in the support 81 along the circumferential direction of the support, a mounting groove 821 is correspondingly formed in the bearing seat 82 along the circumferential direction of the support, elastic balls 84 are arranged in the mounting grooves, the elastic balls 84 are partially located in the containing groove 811, the connection between the second shaft 336 and the transmission shaft 4 is facilitated, and the structure is firm between the bearing seat 82 and the transmission shaft 4.

The handle 21 comprises a rotating part 211 and an operating part 212, the operating part 212 extends out of the shell 1, the transmission shaft 4 is connected with the rotating part 211, a second movable contact 2111 and a third movable contact 2112 are arranged on the outer side edge of the rotating part 211, one end of the second movable contact 2111 is riveted on the rotating part 211, a second movable contact 63 is arranged on the other end of the second movable contact 2111, one end of the third movable contact 2112 is riveted on the rotating part 211, and a third movable contact 64 is arranged on the other end of the third movable contact 2112. The rotating part 211 on be equipped with and supply the male connecting hole 2115 of axis of rotation 4, be equipped with the internal spline on the inside wall of connecting hole 2115, be equipped with outer spline platform on the axis of rotation 4, the internal spline cooperates with outer spline platform and realizes the linkage of handle 21 and transmission shaft 4, the linkage between handle 21 and the transmission shaft 4 of being convenient for the firm in structure of handle and transmission shaft.

Dead pixel detection principle:

When the handle can be normally switched on or off, the position detection switch outputs no signal, so that the handle position detection switch is damaged; if no signal is output between the first moving contact and the second fixed contact, the position detection switch is damaged.

When the handle can not normally realize switching on/off, and the position detection switch can output a switching on/off signal, the electric operating mechanism is indicated to be damaged; if the position detection switch does not output an opening and closing signal, the first moving contact and the second fixed contact are triggered after the sliding sleeve returns, and if the opening and closing signal is output, the manual operation mechanism is damaged; if the free position and the position detection switch have no signal output, the manual control is adopted to switch on/off, and if the manual control can realize the switch on/off, the damage of the electric operating mechanism is indicated; at this time, if the manual control cannot realize the opening and closing, it indicates that the manual operation mechanism is damaged, and the electric operation mechanism needs to be separately checked and judged.

Through the logic judgment setting of the free position detection switch and the handle position detection switch, dead pixels can be effectively detected and judged, and therefore maintenance efficiency is improved.

In the electric closing process, the first moving contact is contacted with the first fixed contact, signals are output, the position detection switch detects closing signals firstly, then detects opening signals, other voltage and current sensors transmit electric parameter data to the MCU, no power failure such as fault current and voltage is calculated, the fact that a breaker handle is not successfully closed is indicated, and the occurrence of a mechanical slide buckle failure can be judged.

In the electric brake separating process, the first moving contact is contacted with the third fixed contact, signals are output, and the position detection switch does not detect a brake-on signal or a brake-separating signal. The inside temperature sensor that is provided with of casing to combine temperature sensor circuit breaker inside temperature to rise fast, contact fusion welding trouble has been judged to appear.

When the position detection switch and the second fixed contact are damaged, the third fixed contact and the first fixed contact can also play a role in substitution.

When the handle position detection switch is damaged, the second fixed contact is intact:

1) When the second moving contact of the handle position detection switch is damaged, the switching-on is not affected, the switching-on process is carried out, the fixed contact at the switching-on position is opened, the first moving contact is contacted with the fixed contact at the switching-on position to output a signal, and the handle is in a switching-on state;

2) When the third moving contact of the handle position detection switch is damaged, closing is not affected at the moment, the brake separating process is carried out, the brake separating position fixed contact is opened, the first moving contact is contacted with the brake separating position fixed contact to output a signal, and the handle is in a brake separating state.

3) When the two moving contacts of the handle position detection switch are damaged, the switching-off position fixed contact and the switching-on position fixed contact are opened.

When the second static contact is damaged, the handle position detection switch is intact:

1) When the second fixed contact is damaged, the sliding sleeve returns to the original position after being switched on, no signal is output, abnormality is detected, the second moving contact on the handle is contacted with the fourth fixed contact, an output signal starts, the running time of the motor is controlled, and the sliding sleeve is ensured to return to the original position;

2) When the second fixed contact is damaged, the sliding sleeve returns to the original position after opening the brake, no signal is output, abnormality is detected, the third moving contact on the handle is contacted with the fourth fixed contact, an output signal starts, the operation of the motor is controlled in time, and the sliding sleeve is ensured to return to the original position.

Because the distances from the sliding sleeve to the original position are different after the opening and closing, the different times of the motor operation are determined through the feedback of two signals, and the sliding sleeve can return to the original position.

Claims (10)

1. The breaking and closing position detection system of the circuit breaker is characterized by comprising a main control unit, a detection unit and a circuit breaker body, wherein the detection unit is connected with the main control unit and comprises a handle position detection switch and a free position detection switch,

The circuit breaker body comprises a shell (1), be equipped with manual operating mechanism (2) and electric operating mechanism (3) in shell (1), manual operating mechanism (2) are including rotating handle (21) that sets up on shell (1), electric operating mechanism (3) include motor (31) and first circuit board (32), motor and first circuit board are connected with the master control unit electricity, motor (31) are connected with first circuit board (32) electricity, link through drive assembly between motor and the handle, drive assembly includes mount pad (331), first axle (332), driving gear (333), driven gear (334), sliding sleeve (335) and second axle (336), first axle (336) be connected with motor (31), first axle (332) and second axle (336) rotate and set up on mount pad (331) and parallel arrangement, second axle (336) are through transmission shaft (4) and linkage of handle (21), driving gear (333) set up on first axle (332) and first axle (332), driven gear (335) are established on sliding sleeve (332) and sliding sleeve (336) are established through synchronous rotation (332) and sliding sleeve (336), and is meshed with the driving gear (333);

The free position detection switch comprises a first movable contact, a first fixed contact, a second fixed contact and a third fixed contact, wherein a first movable contact (5) which rotates synchronously with the sliding sleeve is arranged on the sliding sleeve (335), the first movable contact (51) is arranged on the first movable contact (5), the first fixed contact (321), the second fixed contact (322) and the third fixed contact (323) are arranged on a rotating track of the sliding sleeve (335) on the first circuit board (32), and the sliding sleeve (335) rotates under the driving of the motor (31) to drive the first movable contact (51) to contact with one of the fixed contacts;

The handle position detection switch comprises a second circuit board (61), a fourth fixed contact arranged on the second circuit board (61), and a second movable contact (63) and a third movable contact (64) arranged on the handle (21), wherein the second circuit board (61) is electrically connected with the first circuit board (32);

The method comprises the steps that output signals of a first fixed contact and a second movable contact are obtained at first from a main control unit, then the output signals of the second fixed contact are obtained, at the moment, the circuit breaker is in a closing state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that output signals of a third fixed contact and a third movable contact are obtained at first from a main control unit, then, output signals of a second fixed contact are obtained, at the moment, the circuit breaker is in a switching-off state, and the first movable contact is in contact with the second fixed contact and is in a free position;

The method comprises the steps that firstly, an output signal of a first fixed contact is obtained at a main control unit, then, an output signal of a second fixed contact is obtained, and an output signal of a second movable contact is not obtained, or firstly, an output signal of a third fixed contact is obtained at the main control unit, then, an output signal of the second fixed contact is obtained, and an output signal of the third movable contact is not obtained, wherein a handle position detection switch is damaged;

when the main control unit acquires signals output by the second movable contact or the third movable contact and does not receive signals output by the first fixed contact and the third contact, the electric operating mechanism is damaged;

The main control unit does not acquire the handle position detection switch, but acquires a signal output by the second stationary contact, and at the moment, the manual operating mechanism is damaged.

2. The opening and closing position detection system of the circuit breaker according to claim 1, wherein the detection unit further comprises an electric opening and closing position detection switch and an electric closing and closing position detection switch, the first circuit board (32) comprises a first board body (324), a second board body (325) and a connecting plate (326) for connecting the first board body (324) and the second board body (325), the two board bodies are oppositely arranged, the first stationary contact (321), the second stationary contact (322) and the third stationary contact (323) are arranged on the two board bodies, and the first movable contact (5) is positioned between the two board bodies;

The electric opening position detection switch and the electric closing position detection switch both adopt reflective photoelectric switches, and comprise a transmitting tube and a receiving tube, wherein the transmitting tube is arranged on the first plate body, and the receiving tube is arranged on the second plate body;

The method is divided into two position signals, wherein one signal is provided with a shielding and the other signal is provided with no shielding;

The signal output by the electric switch-on position detection switch is blocked, the main control unit drives the motor to rotate clockwise, at the moment, the signals output by the electric switch-on position detection switch and the electric switch-off position detection switch are both unblocked, the main control unit continues to drive the motor to rotate clockwise, at the moment, the signal output by the electric switch-off position detection switch is blocked, the main control unit drives the motor to rotate anticlockwise, the first moving contact is contacted with the second fixed contact, the free position detection switch outputs a signal, and the motor is stopped;

the signal output by the electric closing position detection switch is non-shielding, the main control unit drives the motor to rotate anticlockwise, if the second static contact outputs no signal, the motor continues to rotate anticlockwise, and when the second static contact outputs a signal, the motor stops.

3. The opening and closing position detection system of the circuit breaker according to claim 2, wherein a temperature sensor is arranged in the shell (1), the temperature sensor is electrically connected with the main control unit, when the circuit breaker is electrically opened, the electric opening detection switch outputs a signal, the handle position detection switch does not detect the opening signal and the closing signal, the temperature output by the temperature sensor is rapidly increased, and the circuit breaker is in contact fusion welding fault.

4. The opening and closing position detecting system of a circuit breaker according to claim 1,2 or 3, wherein the transmission assembly further comprises a constant motion gear (337), a tower-shaped spring (338) and a rotary table (339), the driving gear (333) comprises a sleeve (3331), a left gear (3332) and a right gear (3333) arranged at two ends of the sleeve (3331), the constant motion gear (337) is meshed with the left gear (3332), and the driven gear (334) is meshed with the right gear (3333).

5. The opening and closing position detection system of the circuit breaker according to claim 4, wherein a friction boss (3371) and a threaded boss (3372) positioned on the right side of the friction boss (3371) are arranged on the normally-moving gear (337), the rotary table (339) and the tower-shaped spring (338) are sleeved on the threaded boss (3372), the tower-shaped spring (338) is positioned between the rotary table (339) and the sliding sleeve (335), the sliding sleeve (335) is in threaded fit with the threaded boss (3372), the sliding sleeve (335) slides towards the friction boss (3372) when the sliding sleeve (335) is separated from the driven gear (334) and the motor (31) rotates reversely, the tower-shaped spring (338) is compressed, the rotary table (339) and the friction boss (3372) are combined into a whole through friction pressure, and accordingly the sliding sleeve (335) is driven to rotate so that opening and closing can be achieved.

6. The opening and closing position detection system of a circuit breaker according to claim 4, wherein a first connection structure is arranged between the sliding sleeve (335) and the driven gear (334), the first connection structure comprises a spring and a positioning piece (7), a plurality of installation cavities are arranged on the inner side wall of the driven gear (334) along the circumferential direction of the inner side wall, the spring and the positioning piece (7) are arranged in each installation cavity, a plurality of positioning grooves are correspondingly arranged on the sliding sleeve (335), and the positioning piece (7) is clamped into the positioning grooves under the action of the spring to realize connection of the sliding sleeve (335) and the driven gear (334).

7. The opening and closing position detection system of a circuit breaker according to claim 4, wherein the second shaft (336) is connected with the transmission shaft (4) through a second connection structure, the second connection structure comprises a support (81), a bearing seat (82) installed in the support (81) and a bearing (83), the bearing (83) is located inside the bearing seat (82), a radial gap is formed between the bearing seat (82) and the support (81), a containing groove (811) is formed in the support (81) along the circumferential direction of the support, a mounting groove (821) is correspondingly formed in the bearing seat (82) along the circumferential direction of the support, elastic balls (821) are arranged in each mounting groove, and each elastic ball (821) is partially located in the containing groove (811).

8. The opening and closing position detection system of the circuit breaker according to claim 5,6 or 7, wherein a collar is sleeved on the sliding sleeve (335), the collar is in interference fit with the sliding sleeve (335), and the first movable contact piece (5) is arranged on the collar.

9. The opening and closing position detection system of a circuit breaker according to claim 4, wherein the handle (21) comprises a rotating part (211) and an operating part (212), the operating part (212) extends out of the shell (1), the transmission shaft (4) is connected with the rotating part (211), a second movable contact (2111) and a third movable contact (2112) are arranged on the outer side edge of the rotating part (211), one end of the second movable contact (2111) is riveted on the rotating part (211), the other end is provided with a second movable contact (63), one end of the third movable contact (2112) is riveted on the rotating part (211), and the other end is provided with a third movable contact (64).

10. The opening and closing position detection system of the circuit breaker according to claim 9, wherein the rotating part (211) is provided with a connecting hole (2115) for inserting the rotating shaft (4), an inner spline is arranged on the inner side wall of the connecting hole (2115), an outer spline table is arranged on the rotating shaft (4), and the inner spline is matched with the outer spline table to realize linkage of the handle (21) and the transmission shaft (4).