Opening and closing state monitoring module of external circuit breaker of electric energy meter

Abstract

The utility model discloses a switch-on and switch-off state monitoring module of an external circuit breaker of an electric energy meter, which comprises a shell, a rotating body, a circuit board, a position sensing device and an electric actuating mechanism used for controlling switch-on and switch-off of the circuit breaker are arranged in the shell, and the rotating body is in transmission connection with the electric actuating mechanism. The position sensing device comprises a first position sensing unit arranged on the rotating body and two second position sensing units arranged on the circuit board, and the first position sensing unit can move between the positions matched with the two second position sensing units to sense along with rotation of the rotating body. And when the circuit breaker is in an opening state and a closing state, the first position sensing unit is respectively located at positions correspondingly sensed by the two second position sensing units. The device can be integrated on the external circuit breaker of the electric energy meter, and has the advantages of simple and compact structure and high reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of low voltage electrical, specifically relates to a kind of opening and closing state monitoring module of electric energy meter external circuit breaker. BACKGROUND

[0002] Electric energy meter external circuit breaker is specially designed for intelligent electric meter supporting external protection and control device, usually installed in electric meter box, electric meter out line side, core function is to realize the overload of user power loop, short circuit protection, while supporting remote or local opening and closing operation, can be completed with intelligent electric meter underpayment power failure, fault automatic isolation, power safety control etc. Task, can effectively improve the safety of resident and industrial and commercial user power loop, controllability, it is the important supporting equipment of intelligent power grid end power management.

[0003] At present, in order to realize the monitoring of electric energy meter external circuit breaker opening and closing state, commonly used is to judge the opening and closing state of electric energy meter external circuit breaker according to the voltage collected by external line, when detecting that there is rated voltage in loop, it is judged as closing state, when detecting that voltage is zero, it is judged as opening state.

[0004] The above-mentioned monitoring scheme based on external line voltage collection is susceptible to poor contact, broken line, short circuit, voltage fluctuation of power grid, etc. It may cause false judgment, in addition, it also needs to design collection loop and additional wiring for different circuit breakers, with high installation and maintenance cost and poor adaptability, not suitable for application in small space scene such as electric meter box. UTILITY MODEL CONTENTS

[0005] In view of the above technical problems, the utility model provides a kind of opening and closing state monitoring module of electric energy meter external circuit breaker, it is integrated on electric energy meter external circuit breaker, with the advantages of simple structure, compact, strong reliability.

[0006] The opening and closing state monitoring module of electric energy meter external circuit breaker of the utility model, including shell, rotation body, circuit board, position sensing device and electric actuator for controlling circuit breaker opening and closing are arranged in shell, the rotation body and electric actuator are drivingly connected, the position sensing device includes first position sensing unit arranged on rotation body, two second position sensing units arranged on circuit board, first position sensing unit can move between the position of cooperating sensing with two second position sensing units along with the rotation of rotation body, when the circuit breaker is in opening and closing state, first position sensing unit is respectively in the position of corresponding sensing with two second position sensing units.

[0007] The electric actuator drives the rotating body to rotate when controlling the on-off of the circuit breaker, and the rotating body drives the first position sensing unit to move when rotating, and the first position sensing unit corresponds to the on-off control state of the electric actuator when moving to positions corresponding to the two second position sensing units (i.e. positions for sensing cooperation with the second position sensing units), so that the on-off position of the electric actuator can be judged by detecting the sensing signals of the position sensing device.

[0008] Compared with the traditional detection mode of collecting voltage, the utility model discloses will not appear misjudgment, and can be integrated on the controller of the external circuit breaker of the electric energy meter, and the overall structure is more compact.

[0009] Further, the rotating body is arranged between the circuit board and the inner wall of the shell, the inner wall of the shell is provided with a first through hole for the main shaft of the circuit breaker to pass through the shell, the shell can be connected with the circuit breaker, one side of the rotating body is in transmission cooperation with the main shaft, the electric actuator can drive the circuit breaker to close by the rotating body and the main shaft, and the first position sensing unit is arranged on the other side of the rotating body.

[0010] Further, the shell is provided with a gear fixed in cooperation with the main shaft near the inner wall, and the rotating body is coaxially provided with a first tooth part in transmission cooperation with the gear on one side.

[0011] Further, the gear and the first tooth part are both in the shape of a sector, the shell is rotatably provided with a swing rod, one side of the rotating body is provided with a cam part, one end of the swing rod and the cam part are in pushing cooperation, the other end of the swing rod is provided with a transmission rod, the inner wall of the shell is provided with a second through hole for the transmission rod to extend to the outside of the shell, and the transmission rod is connected with the operating mechanism of the adjacent circuit breaker.

[0012] Further, the electric actuator comprises a motor arranged in the shell, the outer periphery of the rotating body is circumferentially provided with a second tooth part, and the output shaft of the motor and the second tooth part of the rotating body are in transmission connection through a reduction gear set.

[0013] Further, the motor is horizontally arranged at the top of one end of the shell, and the output shaft of the motor is arranged towards the other end of the shell, and the speed reduction gear set comprises at least a double gear arranged along the direction of the two ends of the shell, so that the space in the shell is reduced, and the structure of the shell is more compact.

[0014] Further, the first position sensing unit is a magnetic block, the second position sensing unit is a Hall element matched with the magnetic block for sensing, and the rotating body is provided with a mounting groove on the side corresponding to the circuit board, both ends of the mounting groove are arranged along the radial direction of the rotating body, and the magnetic block is embedded and fixed in the mounting groove, so that the assembly between the first position sensing unit and the rotating body is facilitated.

[0015] Further, the magnetic block comprises a base embedded in the mounting groove and an exposed part connected to the radial outer end of the base, the exposed part is arranged at the edge of the mounting groove, the distance between the exposed part and the Hall element is closer, the sensing effect can be improved, the exposed part is relatively located at the outer position along the radial direction, the movement stroke of the exposed part can be increased, sufficient spacing distance between the two Hall elements can be ensured, mutual interference can be prevented, and the bottom of the mounting groove is provided with a positioning hole, the magnetic block further comprises a connecting column in plug-in positioning cooperation with the positioning hole, and the connection reliability of the magnetic block and the rotating body can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a use state diagram of the utility model embodiment;

[0017] Figure 2 It is the internal structure of the utility model embodiment Figure 1 ;

[0018] Figure 3 It is a structure diagram of the circuit board of the utility model embodiment;

[0019] Figure 4 It is the internal structure of the utility model embodiment Figure 2 ;

[0020] Figure 5 It is a transmission structure diagram of the rotating body and the motor of the utility model embodiment;

[0021] Figure 6 It is an assembly schematic view of the magnetic block of the utility model embodiment;

[0022] Figure 7 It is a sectional view of the rotating body of the utility model embodiment;

[0023] Figure 8 It is a structure diagram of the utility model embodiment;

[0024] Figure 9This is a schematic diagram illustrating the cooperation between the rotating body and the swing rod in an embodiment of this utility model. Detailed Implementation

[0025] An embodiment of the opening and closing status monitoring module for the external circuit breaker of the energy meter of this utility model, such as... Figures 1-9 As shown, the circuit includes a housing 1, within which a rotating body 2, a circuit board 3, a position sensing device, and an electrical actuator for controlling the opening and closing of a circuit breaker 4 are disposed. The electrical actuator is used to realize remote opening and closing control of the circuit breaker 4. The rotating body 2 and the electrical actuator are connected by a transmission. The electrical actuator rotates the rotating body 2 in conjunction with the circuit breaker 4 while controlling the opening and closing of the circuit breaker 4. The position sensing device includes a first position sensing unit 51 disposed on the rotating body 2 and two second position sensing units 52 disposed on the circuit board 3. The first position sensing unit 51 can move between the positions that are sensed by the two second position sensing units 52 as the rotating body 2 rotates. When the circuit breaker 4 is in the open and closed states, the first position sensing unit 51 is respectively located at the positions sensed by the two second position sensing units 52.

[0026] When the electric actuator controls the opening and closing of the circuit breaker 4, it drives the rotating body 2 to rotate. When the rotating body 2 rotates, it drives the first position sensing unit 51 to move. When the first position sensing unit 51 moves to the position corresponding to the two second position sensing units 52 (i.e., the position that senses and cooperates with the second position sensing units 52), it corresponds to the opening and closing control state of the electric actuator. Therefore, by detecting the sensing signal of the position sensing device, the opening and closing position of the electric actuator can be determined, which is conducive to achieving precise control of the electric actuator.

[0027] Compared to traditional voltage detection methods, this invention avoids false judgments, and as... Figure 1 As shown, it can be integrated into the controller of the external circuit breaker 4 of the electricity meter, making the overall structure more compact.

[0028] The rotating body 2 is distributed between the circuit board 3 and the inner wall of one side of the housing 1. The inner wall of one side of the housing 1 is provided with a first through hole for the main shaft 41 of the circuit breaker 4 to pass through the housing 1. The housing 1 is spliced ​​with the circuit breaker 4. One side of the rotating body 2 is driven by the main shaft 41. The electric actuator can drive the circuit breaker 4 to close the circuit through the rotating body 2 and the main shaft 41. The first position sensing unit 51 is located on the other side of the rotating body 2. The internal structure of the housing 1 is relatively compact.

[0029] The gear 61 is fixedly arranged on the inner wall of the shell 1 near one side, and the first tooth part 21 is coaxially arranged on one side of the rotating body 2 and is in transmission with the gear 61. When the rotating body 2 is driven to rotate by the electric actuator, the gear 61 can be driven to rotate through the first tooth part 21, and then the main shaft 41 is rotated towards the closing direction.

[0030] As shown in Figure 8 、 Figure 9 , the gear 61 and the first tooth part 21 are both in the shape of a sector, the shell 1 is rotatably arranged with the swing rod 9, one side of the rotating body 2 is arranged with the cam part 23, one end of the swing rod 9 and the cam part 23 constitute a pushing cooperation, the other end of the swing rod 9 is arranged with the transmission rod 91, and the inner wall of one side of the shell 1 is arranged with the second through hole for the transmission rod 91 to extend to the outside of the shell 1.

[0031] The transmission rod 91 is connected with the operating mechanism of the adjacent circuit breaker, for example, is connected with the lock catch of the operating mechanism. Since the gear 61 and the first tooth part 21 are both in the shape of a sector, when the rotating body 2 is driven to rotate by the electric actuator, the main shaft 41 can be driven to rotate to the closing position and the first tooth part 21 and the gear 61 are separated, at this state, the circuit breaker can be manually operated to open and close; when the rotating body 2 is driven to rotate reversely by the electric actuator, the swing rod 9 can be swung through the cam part 23, the transmission rod 91 at the other end of the swing rod 9 can drive the operating mechanism of the circuit breaker to release the elastic potential energy, so as to realize the opening, and the gear 61 is reset to rotate and reengage with the first tooth part 21 at the same time of opening, at this state, the cam part 23 keeps limiting the swing rod 9, so that the circuit breaker cannot be closed again by manual operation, avoiding the wrong operation.

[0032] The electric actuator comprises the motor 7 arranged in the shell 1, the outer periphery of the rotating body 2 is circumferentially arranged with the second tooth part 22, the output shaft of the motor 7 and the second tooth part 22 of the rotating body 2 are transmissionally connected through the reduction gear set, the power generated by the motor 7 is transmitted to the main shaft 41 along the output shaft, the reduction gear set, the rotating body 2 and the gear 61, so as to realize the closing control, and the rotating body 2 is used as a transmission part in the closing control link of the electric actuator.

[0033] As shown in Figure 2 、 Figure 4 , the motor 7 is horizontally arranged at the top position of one end of the shell 1, the output shaft 71 of the motor 7 is arranged towards the other end of the shell 1, the reduction gear set comprises two double gears 8 arranged along the direction of the two ends of the shell 1, which can reduce the occupation of the internal space of the shell 1, so that the internal structure of the shell 1 is more compact, and the side inner wall of the shell 1 is integrally formed with the blocking wall 11, which surrounds the lower part of the rotating body 2 and the two double gears 8, so as to avoid the interference with other components in the shell 1.

[0034] The first position sensing unit 51 is a magnetic block, the second position sensing unit 52 is a Hall element matched with the magnetic block for sensing, the rotating body 2 is provided with a mounting groove 20 on a side corresponding to the circuit board 3, two ends of the mounting groove 20 are arranged along a radial direction of the rotating body 2, the magnetic block is embedded and fixed in the mounting groove 20, and assembly between the first position sensing unit 51 and the rotating body 2 is facilitated.

[0035] The magnetic block comprises a base 511 embedded in the mounting groove 20, and an exposed part 512 connected to a radial outer end of the base 511, the exposed part 512 is located outside the mounting groove 20, the exposed part 512 is abutted at an edge of the mounting groove 20, the exposed part 512 is closer to the Hall element, the sensing effect can be improved, the exposed part 512 is relatively located at an outer position along the radial direction, is relatively far from an axis of the rotating body 2, the movement stroke of the exposed part 512 can be increased, sufficient spacing distance between the two Hall elements is ensured, mutual interference is prevented, a positioning hole 201 is arranged at a bottom of the mounting groove 20, the magnetic block further comprises a connecting column 513 in plug-in positioning cooperation with the positioning hole 201, and the connecting reliability of the magnetic block and the rotating body 2 can be improved.

[0036] The above embodiment is only one of preferred specific embodiments of the present application, and common changes and replacements made by those skilled in the art within the technical scheme of the present application are all included in the protection scope of the present application.

Claims

1. A monitoring module for the opening and closing status of an external circuit breaker in an electricity meter, characterized in that: The device includes a housing, within which a rotating body, a circuit board, a position sensing device, and an electrical actuator for controlling the opening and closing of a circuit breaker are disposed. The rotating body and the electrical actuator are connected by a drive mechanism. The position sensing device includes a first position sensing unit disposed on the rotating body and two second position sensing units disposed on the circuit board. The first position sensing unit can move between positions that are sensed by the two second position sensing units as the rotating body rotates. When the circuit breaker is in the open or closed state, the first position sensing unit is respectively in the position sensed by the two second position sensing units.

2. The opening and closing status monitoring module for the external circuit breaker of the energy meter according to claim 1, characterized in that: The rotating body is distributed between the circuit board and the inner wall of one side of the housing. The inner wall of one side of the housing is provided with a first through hole for the main shaft of the circuit breaker to pass through the housing. One side of the rotating body is driven by the main shaft, and the first position sensing unit is provided on the other side of the rotating body.

3. The monitoring module for the opening and closing status of the external circuit breaker of the energy meter according to claim 2, characterized in that: A gear that is fixed to the main shaft is provided near one side of the inner wall of the housing, and a first tooth that is coaxially provided on one side of the rotating body to cooperate with the gear for transmission.

4. The opening and closing status monitoring module for the external circuit breaker of the energy meter according to claim 3, characterized in that: Both the gear and the first tooth are fan-shaped structures. A swing rod is rotatably arranged inside the housing. A cam is provided on one side of the rotating body. One end of the swing rod and the cam form a pushing fit. A transmission rod is provided at the other end of the swing rod. A second through hole is provided on the inner wall of one side of the housing for the transmission rod to extend outward from the housing.

5. The monitoring module for the opening and closing status of the external circuit breaker of the energy meter according to claim 1, characterized in that: The electric actuator includes a motor disposed within a housing, and a second tooth is provided circumferentially on the outer periphery of the rotating body. The output shaft of the motor and the second tooth of the rotating body are connected by a reduction gear set.

6. The opening and closing status monitoring module for the external circuit breaker of the energy meter according to claim 5, characterized in that: The motor is positioned horizontally at the top of one end of the housing, with the motor's output shaft facing the other end of the housing. The reduction gear set includes at least one double gear arranged along both ends of the housing.

7. The power meter external circuit breaker opening and closing status monitoring module according to any one of claims 1 to 6, characterized in that: The first position sensing unit is a magnetic block, and the second position sensing unit is a Hall element that cooperates with the magnetic block to sense the position. The rotating body has a mounting groove on one side of the corresponding circuit board, and the two ends of the mounting groove are arranged along the radial direction of the rotating body. The magnetic block is embedded and fixed in the mounting groove.

8. The opening and closing status monitoring module for the external circuit breaker of the energy meter according to claim 7, characterized in that: The magnetic block includes a base embedded in a mounting groove and an exposed portion connected to the radially outer end of the base. The exposed portion abuts against the edge of the mounting groove. A positioning insertion hole is provided at the bottom of the mounting groove. The magnetic block also includes a connecting post that forms a plug-in positioning fit with the positioning insertion hole.

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