Electric operation mechanism protection system and application thereof

Abstract

The invention discloses an electric operation mechanism protection system and application thereof, which are applied to the technical field of circuit breakers, and comprise a controller, and a speed reduction motor, a gear assembly, an output gear, a linkage rod, a molded case circuit breaker opening and closing brake, a limiting pin, an auxiliary switch linkage sheet and an auxiliary switch which are controlled by the controller, the control end of the gear motor is in transmission connection with the output gear through the gear assembly. The transmission end of the output gear controls the opening and closing of the molded case circuit breaker through the linkage rod. The controlled end of the limiting pin is connected with the driving end of the output gear, and the control end of the limiting pin is connected with the receiving end of the auxiliary switch linkage sheet; the auxiliary switch linkage sheet is connected with the auxiliary switch, and the auxiliary switch linkage sheet is used for controlling the auxiliary switch to disconnect a motor power supply. According to the protection system provided by the embodiment of the invention, the technical problem that rapid remote control cannot be realized can be solved, and the protection efficiency of the electric operation mechanism is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to an electric operating mechanism protection system and its application. Background Art

[0002] With the requirements of digital grid and demand-side response, the application of molded case circuit breakers in power grids is becoming more and more extensive.

[0003] In the prior art, molded case circuit breakers are directly installed in fixed low-voltage distribution boxes, and the power switch is manually turned on and off. During the manual opening and closing process, manual operation cannot achieve rapid remote control, especially in emergency situations (such as failures or fires). Personnel are required to operate on-site, which will further expand the scope of power outages or the impact of safety accidents.

[0004] Therefore, how to improve the protection efficiency of the electric operating mechanism has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The present invention provides an electric operating mechanism protection system and application thereof, so as to solve the technical problem that rapid remote control cannot be achieved, and to improve the protection efficiency of the electric operating mechanism.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides an electric operating mechanism protection system, comprising:

[0007] A controller and a reduction motor, a gear assembly, an output gear, a linkage rod, a molded case circuit breaker opening and closing switch, a limit pin, an auxiliary switch linkage piece and an auxiliary switch controlled by the controller;

[0008] The control end of the reduction motor is transmission-connected to the output gear via the gear assembly;

[0009] The transmission end of the output gear controls the opening and closing of the molded case circuit breaker through the linkage rod;

[0010] The controlled end of the limit pin is connected to the driving end of the output gear, and the control end of the limit pin is connected to the receiving end of the auxiliary switch linkage piece;

[0011] The auxiliary switch linkage piece is connected to the auxiliary switch, and the auxiliary switch linkage piece is used to control the auxiliary switch to disconnect the motor power supply.

[0012] As one of the preferred solutions, the electric operating mechanism protection system further includes a protection control module; a control end of the protection control module is communicatively connected with the molded case circuit breaker for opening and closing.

[0013] As one of the preferred solutions, the electric operating mechanism protection system further includes a load control module; the load control module is communicatively connected to the motor power supply.

[0014] As one of the preferred solutions, the load control module is a varistor.

[0015] As one preferred solution, the electric operating mechanism protection system further includes an alarm;

[0016] The alarm is arranged on the surface of the reduction motor, and the alarm is electrically connected to the protection control module.

[0017] As a preferred solution, the alarm includes a buzzer alarm and a light alarm.

[0018] As one of the preferred solutions, the protection control module further includes a timing control unit;

[0019] The controlled end of the timing control unit is in communication connection with the controller, and the control end of the timing control unit is in communication connection with the motor power supply.

[0020] Another embodiment of the present invention provides a low-voltage molded case circuit breaker device, comprising the electric operating mechanism protection system as described in any one of the above items.

[0021] Yet another embodiment of the present invention provides a distribution network switch cabinet, comprising a plurality of low-voltage molded case circuit breakers as described above.

[0022] Yet another embodiment of the present invention provides a substation, comprising a number of the low-voltage molded case circuit breakers described above or the distribution network switch cabinets described above.

[0023] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0024] The present invention controls the reduction motor, gear assembly, output gear, linkage rod, molded case circuit breaker opening and closing, limit pin, auxiliary switch linkage plate and auxiliary switch through a controller. When the molded case circuit breaker is opened and closed in the right position, the auxiliary switch automatically cuts off the power supply of the control circuit, ensuring that the electric operating mechanism and the molded case circuit breaker are protected from damage during operation, thereby improving operational reliability. At the same time, it can solve the technical problem that the electric operating mechanism cannot achieve rapid remote control in the case of abnormal operation, thereby improving the protection efficiency of the electric operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an electric operating mechanism protection system in one embodiment of the present invention;

[0026] Figure 2It is a schematic diagram of the design of the gear assembly and the opening and closing of the molded case circuit breaker in one embodiment of the present invention.

[0027] Reference numerals:

[0028] Among them, 1. Controller; 2. Reducer motor; 3. Gear assembly; 4. Output gear; 5. Linkage rod; 6. Molded case circuit breaker opening and closing; 7. Limit pin; 8. Auxiliary switch linkage plate; 9. Auxiliary switch. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are for illustrative purposes only, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In describing the present invention, it should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] An embodiment of the present invention provides an electric operating mechanism protection system. For details, see Figure 1-Figure 2 , Figure 1 FIG. 1 is a schematic structural diagram of an electric operating mechanism protection system in one embodiment of the present invention. Figure 2 The figure shows a schematic diagram of the design of the gear assembly and the molded case circuit breaker opening and closing in one embodiment of the present invention, including:

[0034] The controller 1 and the reduction motor 2, gear assembly 3, output gear 4, linkage rod 5, molded case circuit breaker opening and closing device 6, limit pin 7, auxiliary switch linkage piece 8 and auxiliary switch 9 controlled by the controller 1.

[0035] Specifically, the connection relationship between the components is as follows:

[0036] The control end of the reduction motor 2 is connected to the output gear 4 through the gear assembly 3;

[0037] The transmission end of the output gear 4 controls the opening and closing of the molded case circuit breaker 6 through the linkage rod 5;

[0038] The controlled end of the limit pin 7 is connected to the driving end of the output gear 4, and the control end of the limit pin 7 is connected to the receiving end of the auxiliary switch linkage piece 8;

[0039] The auxiliary switch linkage piece 8 is connected to the auxiliary switch 8 , and the auxiliary switch linkage piece 7 is used to control the auxiliary switch 8 to disconnect the motor power supply.

[0040] In response to the instruction of the controller 1, the reduction motor 2 is started to drive the gear assembly 3, and the instruction is transmitted to the output gear 4; the output gear 4 drives the linkage rod 5 to process the opening and closing of the molded case circuit breaker 6 based on the instruction; when the molded case circuit breaker is closed or opened, the output gear 4 presses the auxiliary switch linkage piece 8 by controlling the limit pin 7 connected to the output gear 4, thereby controlling the auxiliary switch 9 to disconnect the power supply.

[0041] To prevent damage to the molded case circuit breaker (MCCB) due to over-operation of the electric operating mechanism, a special design was implemented in the gear transmission system and output gear. The number of teeth on the output gear was calculated, resulting in an 1800-turn design. This means that for every 900 turns of the switch, the output gear rotates 1800 turns, and the operating lever for opening and closing the MCCB rotates exactly 900 turns. This means that when the MCCB switches from the open position to the closed position, or vice versa, if the power is not cut off in time, the output gear will disengage from the gear train, preventing it from rotating the MCCB, effectively protecting the MCCB.

[0042] Preferably, the instructions of the controller 1 are operation instructions issued by the opening and closing buttons or the monitoring master station.

[0043] Preferably, the electric operating mechanism protection system further comprises a protection control module, and a control end of the protection control module is communicatively connected with the opening and closing of the molded case circuit breaker.

[0044] The protection control module further includes a timing control unit, a controlled end of the timing control unit is communicatively connected to the controller, and a control end of the timing control unit is communicatively connected to the motor power supply.

[0045] That is to say, when the auxiliary switch of the electric operating mechanism fails or the molded case circuit breaker fails, the protection control module fails to receive the molded case circuit breaker position information fed back by the auxiliary switch in time. When a certain delay is exceeded, the timing control unit in the protection control module will automatically stop the motor power supply for protection.

[0046] In other words, in order to prevent the failure of the auxiliary switch from causing damage to the electric operating mechanism due to over-operation, mechanical operation protection is provided on the output gear, and timing protection is set inside the protection control module to ensure the electric operating mechanism.

[0047] The electric operating mechanism protection system further includes a load control module, which is communicatively connected to the motor power supply.

[0048] Preferably, the load control module is a varistor.

[0049] When the output line of the electric operating mechanism is stuck or exceeds a certain pressure, the varistor of the load control module will be protected and the output power of the motor will be cut off. After the fault is contacted, the varistor will recover automatically.

[0050] The electric operating mechanism protection system further includes an alarm; the alarm is arranged on the surface of the reduction motor, and the alarm is electrically connected to the protection control module.

[0051] Specifically, when the auxiliary switch of the electric operating mechanism fails or the molded case circuit breaker fails, the alarm will sound and promptly send the operating information of the electric operating mechanism to the monitoring main station and the operation and maintenance personnel on duty.

[0052] The present invention controls the reduction motor, gear assembly, output gear, linkage rod, molded case circuit breaker opening and closing, limit pin, auxiliary switch linkage plate and auxiliary switch through a controller. When the molded case circuit breaker is opened and closed in place, the auxiliary switch automatically cuts off the power supply of the control circuit, ensuring that the electric operating mechanism and the molded case circuit breaker are protected from damage during operation, improving operational reliability, and at the same time being able to solve the problem of abnormal operation of the electric operating mechanism and realize protection of the electric operating mechanism.

[0053] The present invention controls the reduction motor, gear assembly, output gear, linkage rod, molded case circuit breaker opening and closing, limit pin, auxiliary switch linkage plate and auxiliary switch through a controller. When the molded case circuit breaker is opened and closed in the right position, the auxiliary switch automatically cuts off the power supply of the control circuit, ensuring that the electric operating mechanism and the molded case circuit breaker are protected from damage during operation, thereby improving operational reliability. At the same time, it can solve the technical problem that the electric operating mechanism cannot achieve rapid remote control in the case of abnormal operation, thereby improving the protection efficiency of the electric operating mechanism.

[0054] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An electric operating mechanism protection system, characterized in that: include: A controller and a reduction motor, a gear assembly, an output gear, a linkage rod, a molded case circuit breaker opening and closing switch, a limit pin, an auxiliary switch linkage piece and an auxiliary switch controlled by the controller; The control end of the reduction motor is transmission-connected to the output gear via the gear assembly; The transmission end of the output gear controls the opening and closing of the molded case circuit breaker through the linkage rod; The controlled end of the limit pin is connected to the driving end of the output gear, and the control end of the limit pin is connected to the receiving end of the auxiliary switch linkage piece; The auxiliary switch linkage piece is connected to the auxiliary switch, and the auxiliary switch linkage piece is used to control the auxiliary switch to disconnect the motor power supply.

2. The electric operating mechanism protection system according to claim 1, characterized in that: The electric operating mechanism protection system also includes a protection control module; The control end of the protection control module is in communication connection with the molded case circuit breaker for opening and closing switches.

3. The electric operating mechanism protection system according to claim 1, characterized in that: The electric operating mechanism protection system also includes a load control module; The load control module is in communication with the motor power supply.

4. The electric operating mechanism protection system according to claim 3, characterized in that: The load control module is a varistor.

5. The electric operating mechanism protection system according to claim 2, characterized in that: The electric operating mechanism protection system also includes an alarm; The alarm is arranged on the surface of the reduction motor, and the alarm is electrically connected to the protection control module.

6. The electric operating mechanism protection system according to claim 5, characterized in that: The alarm includes a buzzer alarm and a light alarm.

7. The electric operating mechanism protection system according to claim 2, characterized in that: The protection control module also includes a timing control unit; The controlled end of the timing control unit is in communication connection with the controller, and the control end of the timing control unit is in communication connection with the motor power supply.

8. A low voltage molded case circuit breaker device, characterized in that: The invention comprises the electric operating mechanism protection system as described in any one of claims 1 to 7.

9. A distribution network switch cabinet, characterized in that: It comprises a number of low-voltage molded case circuit breakers as described in claim 8.

10. A substation, characterized in that: It comprises a number of low-voltage molded case circuit breakers as described in claim 8 or distribution network switch cabinets as described in claim 9.

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