CN212342563U

CN212342563U - Air circuit breaker

Info

Publication number: CN212342563U
Application number: CN202021663599.4U
Authority: CN
Inventors: 熊丽; 吴建宾; 崔贇杰; 黄忠尧
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-01-12
Anticipated expiration: 2030-08-11

Abstract

The invention provides an air circuit breaker, which comprises a bottom plate, a base, a face shield, a moving contact system, a static contact system, a mutual inductor, a controller, an operating mechanism and a magnetic flux converter, wherein the magnetic flux converter is connected with a release and is provided with a self-locking switch, the self-locking switch is connected in series in a circuit connected with the magnetic flux converter and the controller, the self-locking switch is connected in series with a coil of the magnetic flux converter, and a pressable part of the self-locking switch is exposed out of the surface of the face shield. According to the invention, the self-locking switch is connected in series between the magnetic flux converter and the controller, and the self-locking switch is controlled to break a power-on circuit between the controller and the magnetic flux converter, so that the magnetic flux converter is locked, and the circuit breaker is converted into the isolating switch for use, thereby meeting the use requirements of customers and saving the inconvenience of independently purchasing the isolating switch.

Description

Air circuit breaker

Technical Field

The invention relates to the technical field of low-voltage circuit breakers, in particular to an air type low-voltage circuit breaker.

Background

Intelligent circuit breakers and electronic circuit breakers have become a relatively widely used electrical control device. The controller of the circuit breaker mainly comprises an electronic part, a base, a magnetic flux converter and the like. When the mutual inductor of the circuit breaker senses that the current or the voltage in the line exceeds an expected value, a signal is output to the magnetic flux converter through the circuit board to drive the magnetic flux converter to work. The magnetic flux converter is connected with a release of the circuit breaker, and the release is driven to act by the magnetic flux converter.

At present, a controller of the circuit breaker only has a normal protection mode, and the function of the disconnecting switch cannot be realized. The customer needs the isolator switch and needs to purchase separately.

In addition, when the product is maintained or the controller is replaced, the circuit breaker needs to be disconnected, and the front mask of the product needs to be detached, so that power failure occurs for a period of time, and inconvenience is brought to users.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the air circuit breaker capable of being used as the isolating switch, solves the problem that the circuit breaker and the isolating switch can not be used in a conversion mode in the prior art, expands the functions of the air circuit breaker and meets the actual requirements.

In order to achieve the purpose, the air circuit breaker comprises a bottom plate, a base, a mask, a moving contact system, a static contact system, a mutual inductor, a controller, an operating mechanism, a release and a magnetic flux converter, wherein the magnetic flux converter is connected with the release, and the air circuit breaker is characterized in that: the self-locking switch is connected in series in a circuit connecting the magnetic flux converter and the controller or connected in series with a coil of the magnetic flux converter; the pressable part of the self-locking switch is exposed out of the surface of the mask.

The structure can control the electrification condition of a circuit connected with the controller or a coil of the magnetic flux converter by controlling the self-locking switch, thereby realizing the control of switching two states of locking and unlocking of the magnetic flux converter. Since the magnetic flux converter is connected with the release, and the action of the operating mechanism depends on the action of the release, the locking of the magnetic flux converter can lock the operating mechanism.

For the convenience of connection, the invention further provides the following steps: the controller is provided with a plug connector which is used for being electrically connected with two ends of a coil of the magnetic flux converter; the self-locking switch is connected in series in either end of the coil connected to the controller.

For the convenience of operation, the invention further comprises the following steps: the mask is characterized in that a mounting seat is arranged in the mask, the self-locking switch is mounted on the mounting seat, and a hole for exposing a pressable part of the self-locking switch is formed in the mask shell corresponding to the mounting seat.

The invention further provides the following: be provided with the controller base on the base, install an adapter plate on the controller base, the adapter plate includes: the electric connector is electrically connected with the mutual inductor, and the microswitch is connected in series in a quick saturation power supply line of the mutual inductor; and an electric plug-in connector which is plugged with the electric connector to realize electric connection and a pressing part which is in pressing fit with the micro switch are arranged at the inward end of the controller.

According to the structure, the micro switch is arranged to control the on-off of the power supply loop between the mutual inductor and the controller when the controller is plugged and pulled out, the power supply of the mutual inductor to the controller is cut off before the controller is completely pulled out, and the cut-off power supply loop is connected after the controller is plugged, so that the power supply with the load is realized.

For convenience of assembly and use, the invention is further configured as follows: the micro switch is a normally open switch.

For the convenience of connection, the invention further provides the following steps: the surface of the face shield is provided with an opening for inserting the controller and matching with the controller base in an inserting way.

For convenience of use, the invention is further provided with the following components: the side of controller is equipped with elastic buckle, the face guard is equipped with the draw-in groove corresponding to elastic buckle's position department, elastic buckle is fixed with the draw-in groove joint.

The invention further provides the following: the other side face of the controller, opposite to the side face where the elastic buckle is located, is provided with a threaded connecting hole, and the position of the face mask, corresponding to the threaded connecting hole, is provided with a threaded matching hole; the thread matching hole and the thread connecting hole are in threaded connection with a screw together.

The invention has the following beneficial effects: the invention connects a self-locking switch between the magnetic flux converter and the controller in series, and the magnetic flux converter is separated from the control of the controller by controlling the self-locking switch to break the power-on circuit between the controller and the magnetic flux converter, so under the condition, the magnetic flux converter is locked, the controller can not send corresponding instructions to the magnetic flux converter, the magnetic flux converter can not work normally, the tripper connected with the magnetic flux converter does not work during the breaking of the self-locking switch, and the circuit breaker is converted into the isolating switch for use, thereby meeting the use requirements of customers and saving the inconvenience of purchasing the isolating switch independently.

In addition, the microswitch is arranged on a power supply line of the controller from the mutual inductor in series, and the plugging state of the controller is related to the mutual inductor, so that at the first moment when the controller is unplugged but not completely separated, the microswitch loses the pressure resistance and cuts off the power supply of the mutual inductor to the controller, and the controller is directly unplugged under the condition of load, and the controller is electrified to be replaced or the program of the unplugged controller is upgraded.

The invention skillfully designs the self-locking switch and the microswitch at key positions, has simple structure and small volume, realizes the functions of switching the circuit breaker into the disconnecting switch and replacing or upgrading the circuit breaker with electricity under the condition of maintaining the integral structure of the circuit breaker as much as possible, and provides convenience for users in use.

Drawings

FIG. 1 is a general schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic overall exploded view of an embodiment of the present invention.

Fig. 3 is a schematic diagram of a line connection relationship according to an embodiment of the invention.

FIG. 4 is a schematic diagram of the use of an embodiment of the present invention.

Fig. 5 is a schematic diagram of a controller mode according to an embodiment of the invention.

Fig. 6 is a schematic diagram of an embodiment of the present invention.

Reference numerals: 1-bottom plate, 2-static contact system, 3-mutual inductor, 4-moving contact system, 5-base, 6-arc extinguish chamber, 7-controller base, 8-operating mechanism, 9-adapter plate, 10-actuating device, 11-pluggable controller, 12-mask, 13-screw;

9 a-micro switch, 10 a-self-locking switch, 10 b-magnetic flux converter, 11 a-elastic buckle, 11 b-boss.

Detailed Description

Embodiment 1 this embodiment provides an air circuit breaker convertible into isolator and uses, including bottom plate 1, base 5, face guard 12, moving contact system 4, static contact system 2, mutual inductor 3, controller and operating device 8, bottom plate 1 sets up with base 5 relatively, static contact system 2 sets up in bottom plate 1 and base 5 one side relative (its one side inwards), moving contact system 4 installs on the rear end of base 5, moving contact system 4 sets up with static contact system 2 relatively and forms the structure of clearance fit each other after bottom plate 1 and base 5 install. An arc extinguish chamber 6 is arranged between the bottom plate 1 and the base 5 above the moving contact system 4 and the static contact system 2 (the upper part is based on the using state of the circuit breaker in use), and the arc extinguish chamber 6 is communicated with the moving contact system 4 and the cavity where the static contact system 2 is located and used for extinguishing arc. The transformer 3 is also mounted together at the rear end of the base 5.

Other structures such as an operating mechanism 8 are mainly installed at the front end of the base 5, a face shield 12 is matched with the front end of the base 5, and in the operating mechanism 8, a toggle handle, a closing button, an opening button and other components can be exposed through the face shield 12, so that the operating mechanism is convenient to operate and use. A controller seat is arranged on one side edge of the front end of the base 5 and used for installing a controller. In this embodiment, the release is directly linked to the operating mechanism 8 or linked and connected by a release.

The front end of the base 5 is also provided with an actuating device 10, the actuating device 10 comprises a magnetic flux converter 10b and a self-locking switch 10a, the self-locking switch 10a is connected in series in a circuit connecting the magnetic flux converter 10b and the controller: the controller is provided with a plug for electrically connecting with two ends of the coil of the magnetic flux converter 10b, two lead wires are led out from the magnetic flux converter 10b and electrically connected with the plug, so that the controller is electrically connected with the magnetic flux converter 10b, and the controller is convenient to control the working state of the magnetic flux converter 10 b. The self-locking switch 10a is connected in series to either end of the coil connected to the controller. The inside of face guard 12 is equipped with the mount pad, and self-locking switch 10a installs on the mount pad, and the face guard 12 casing is seted up and is supplied the trompil that can press the portion to expose of self-locking switch 10 a.

For control, the latching switch 10a is preferably a normally closed switch in this embodiment.

The implementation process of this embodiment is as follows: when the switch is switched to the isolating switch, the connection between the controller and the magnetic flux converter 10b can be disconnected only by pressing the pressing part of the self-locking switch 10a exposed out of the surface of the mask 12, and the controller does not supply power to the magnetic flux converter 10b any more. Meanwhile, the controller monitors that the actuating mechanism is locked, and does not acquire current signals of the mutual inductor 3, so that the circuit breaker can be used as an isolating switch.

Embodiment 2 as shown in fig. 1, this embodiment provides an air circuit breaker that can be converted into a disconnecting switch for use and can be used with a hot plug controller, and the structure thereof is as follows: in this embodiment, on the basis of embodiment 1, the controller is replaced by a pluggable controller 11, an adapter plate 9 is disposed on the controller base 7, an electrical connector and a micro switch 9a are disposed on the adapter plate 9, electrical connection ends of the electrical connector are respectively disposed on two sides of the front surface and the back surface of the adapter plate 9, and the micro switch 9a is mounted on the front surface of the adapter plate 9. The electrical connection end of the electrical connector on the back of the adapter plate 9 is electrically connected with the rapid saturation power supply line of the transformer 3, and the electrical connection end of the electrical connector on the front of the adapter plate 9 is electrically connected with the pluggable controller 11. Fig. 6 shows a schematic diagram of the microswitch 9a connected in series between the electrical connection end of the back surface and the rapid saturation power supply line of the transformer 3.

As shown in fig. 3, in order to facilitate connection, in this embodiment, a bottom of the inward side of the pluggable controller 11 protrudes toward the side of the base 5 to form a protrusion, and an inner sidewall (here, inward toward the side of the base 5) of the protrusion is provided with an electrical connector for electrical connection with the electrical connector, and a boss 11b for abutting against and press-fitting with the normally-open microswitch 9 a. The positions of the boss 11b and the electric plug-in connector on the boss correspond to the contact part and the electric connector of the micro switch 9a on the adapter plate 9 respectively.

But be equipped with the holistic heavy groove of holding pluggable controller 11 corresponding to controller base 7 position on the face guard 12, simultaneously, the opening has been seted up corresponding to keyset 9 position, during the installation, but the convex part of pluggable controller 11 enters into the inner space of the circuit breaker between face guard 12 and the base 5 through the opening, and with keyset 9 plug-in connection, at this moment, boss 11b also supports with micro-gap switch 9a and presses, normally open in the micro-gap switch 9a is closed, the return circuit intercommunication between mutual-inductor 3 and the pluggable controller 11. The pluggable controller 11 continues to be advanced until it is completely immersed in the sink, i.e., the installation of the pluggable controller is completed.

In a specific embodiment, for the position of fixed pluggable controller 11, prevent that it from becoming flexible or breaking away from the circuit breaker, this embodiment has set up an elasticity buckle 11a on the top lateral wall of controller, has set up the threaded connection hole simultaneously on its bottom lateral wall. Correspondingly, the face mask 12 is provided with a clamping groove matched with the elastic buckle 11a and a threaded matching hole matched with the threaded connecting hole. After the pluggable controller 11 enters the sinking groove, the elastic buckle 11a is naturally tightly matched with the clamping groove, the thread matching hole and the thread connecting hole are coaxially arranged, and then a screw 13 is screwed into the thread matching hole and the thread connecting hole to be screwed tightly to complete the fixation of pluggable control.

As shown in fig. 5, the circuit breaker of the present embodiment has three modes — protection mode, isolation mode, and maintenance mode: when the controller is in a protection mode, the execution device 10 is in an unlocking state (the self-locking switch 10a is closed), and all protection functions of the circuit breaker can normally work; in the isolation mode, the controller monitors that the execution device 10 is locked (the self-locking switch 10a is disconnected), the current signal of the mutual inductor 3 is not collected, and the circuit breaker can be used as an isolation switch; in the maintenance mode, the actuator 10 is locked (the latching switch 10a is turned off), the pluggable controller 11 is pulled out, and the controller can be upgraded with a program or replaced with a power supply.

The above mode is specifically operated as follows, when the circuit breaker normally operates, the controller mode selected on the mobile phone APP or the controller interface is a maintenance mode, the button of the self-locking switch 10a is manually pressed to be popped up, and a loop between the magnetic flux converter 10b and the controller is disconnected. Then the screw 13 is removed, and the elastic buckle 11a of the controller is pressed, so that the controller can be safely and quickly removed. After the pluggable controller 11 is replaced and installed, the button of the self-locking switch 10a is pressed to connect the loop. The controller mode is changed to the protection mode. The controller is replaced with the load, and the operation process is safe and reliable.

In summary, the invention provides an air switch which is simple in structure and convenient to operate and use, the self-locking switch 10a is arranged for locking the magnetic flux converter 10b, and the circuit breaker can be converted into a disconnecting switch for use by one key, so that the actual use requirement is met. Moreover, the self-locking switch 10a is locked, so that the breaker can be loaded, the controller can be replaced without removing the product mask 12, the new requirement of the national power grid that the controller is required to be replaced in an electrified way is met, and the economic loss caused by power failure accidents can be reduced.

Claims

1. The utility model provides an air circuit breaker, includes bottom plate, base, face guard, moving contact system, static contact system, mutual-inductor, controller, operating device, release and magnetic flux converter, the magnetic flux converter with the release is connected its characterized in that: the self-locking switch is connected in series in a circuit connecting the magnetic flux converter and the controller or connected in series with a coil of the magnetic flux converter; the pressable part of the self-locking switch is exposed out of the surface of the mask.

2. An air circuit breaker according to claim 1, characterized in that: the controller is provided with a plug connector which is used for being electrically connected with two ends of a coil of the magnetic flux converter; the self-locking switch is connected in series in either end of the coil connected to the controller.

3. An air circuit breaker according to claim 1, characterized in that: the mask is characterized in that a mounting seat is arranged in the mask, the self-locking switch is mounted on the mounting seat, and a hole for exposing a pressable part of the self-locking switch is formed in the mask shell corresponding to the mounting seat.

4. An air circuit breaker according to any one of claims 1 to 3, characterized in that: be provided with the controller base on the base, install an adapter plate on the controller base, the adapter plate includes: the electric connector is electrically connected with the mutual inductor, and the microswitch is connected in series in a quick saturation power supply line of the mutual inductor; and an electric plug-in connector which is plugged with the electric connector to realize electric connection and a pressing part which is in pressing fit with the micro switch are arranged at the inward end of the controller.

5. An air circuit breaker according to claim 4, characterized in that: the micro switch is a normally open switch.

6. An air circuit breaker according to claim 4, characterized in that: the surface of the face shield is provided with an opening for inserting the controller and matching with the controller base in an inserting way.

7. An air circuit breaker according to claim 4, characterized in that: the side of controller is equipped with elastic buckle, the face guard is equipped with the draw-in groove corresponding to elastic buckle's position department, elastic buckle is fixed with the draw-in groove joint.

8. An air circuit breaker according to claim 4, characterized in that: the other side face of the controller, opposite to the side face where the elastic buckle is located, is provided with a threaded connecting hole, and the position of the face mask, corresponding to the threaded connecting hole, is provided with a threaded matching hole; the thread matching hole and the thread connecting hole are in threaded connection with a screw together.