CN214588661U

CN214588661U - Plug-in circuit breaker

Info

Publication number: CN214588661U
Application number: CN202120463698.6U
Authority: CN
Inventors: 卢瑞明; 冷岩; 倪鸿儒
Original assignee: Beijing Mingri Electrical Equipment Co ltd
Current assignee: Beijing Mingri Electrical Equipment Co ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-11-02
Anticipated expiration: 2031-03-03

Abstract

The utility model relates to a plug-in circuit breaker, which comprises a shell, a wire inlet and outlet mechanism, a manual and electric operating mechanism, a contact actuating mechanism and an overload and short-circuit protection mechanism, the invention has higher standardization degree and more universal parts, saves the production cost, is convenient for the use and maintenance of users, meanwhile, a plurality of special technologies such as a wire outlet mechanism are adopted, the wire pressing plate not only can apply upward pressure to the external lead, but also can provide a reverse force for preventing the external lead from sliding out, so that the external lead is not easy to fall off, and the design of the manual handle ensures that the opening and closing display mechanism and the locking mechanism have simple structures and reliable work, in the electric operating mechanism, the closing and opening are respectively a system without mutual interference, and in the short-circuit protection, different electromagnetic trips are selected according to the specifications of large current and small current, so that the short-circuit protection performance of the circuit breaker is improved.

Description

Plug-in circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus, concretely relates to plug-in circuit breaker.

Background

Along with the rapid development of electric power and communication technology in China, increasingly high requirements are provided for the practicability, safety and reliability of terminal electrical equipment such as a circuit breaker, the traditional circuit breaker can not meet the requirements far away, in the continuous research and development, the circuit breaker in China not only reaches a new level in the aspects of miniaturization, intellectualization, reliability and the like, a plurality of brand-new designs are structurally appeared, if the circuit breaker can be conveniently plugged and unplugged like a common electrical plug, the circuit breaker can be conveniently installed in or withdrawn from a circuit, the circuit breaker can be locked in a stable working state in a mounting position, meanwhile, the circuit breaker can adapt to various requirements of intellectualization on power supply quality, automatic control and the like, and the circuit breaker is called as a plug-in circuit breaker.

At present, the design and the use of the plug-in circuit breaker in China are continuously explored, and the plug-in circuit breaker is obviously insufficient in structure and use performance, for example, the labeling degree of parts is not high, the working performance is not stable, and the variety does not meet the requirements of use and development.

Disclosure of Invention

To the not enough of present china's bayonet circuit breaker existence, the utility model discloses release a standardization level is higher, novel structure, stable performance's bayonet circuit breaker.

The utility model adopts the technical proposal that:

a plug-in circuit breaker comprises a shell, a wire inlet mechanism, a wire outlet mechanism, a manual operation mechanism, an electric operation mechanism, a contact action mechanism, an arc extinguishing mechanism and an overload and short circuit protection mechanism.

The utility model discloses a set up, the casing be rectangular hexahedron, the leading flank is the face of being qualified for the next round of competitions, the trailing flank is the face of being qualified for the next round of competitions, is provided with the dipolar, the left side is the base first utmost point, the right side is the upper cover first utmost point, the casing right side is the side cover.

The manual operating mechanism comprises a manual handle, a switching-off and switching-on display mechanism and a locking mechanism, the manual handle is arranged on the front side of the upper part of one pole of the left side base of the shell, a key of the manual handle is exposed on the front side of the shell, the switching-off and switching-on display mechanism is arranged on the front side of the upper part of one pole of the right side upper cover of the shell, and the locking mechanism is arranged on the upper part of the manual handle.

The electric operating mechanism comprises a closing motor, a separating electromagnet and a PCB control board, wherein the closing motor is vertically arranged on the left side of the PCB control board, the separating electromagnet is horizontally arranged on the lower portion of the PCB control board, and the electric operating mechanism is arranged on the rear side of the separating and closing display mechanism.

The contact actuating mechanism is arranged on the rear side of the electric operating mechanism, an arc guide sheet is arranged between a moving contact and a fixed contact of the electric operating mechanism, and an arc extinguishing chamber is arranged on the rear side of the arc guide sheet.

The overload protection mechanism comprises a thermal tripping bimetallic strip, one end of the thermal tripping bimetallic strip is connected with the contact actuating mechanism through a connecting rod, and the other end of the thermal tripping bimetallic strip is connected with an inlet wire socket of one pole.

The short-circuit protection mechanism further comprises an electromagnetic release which is arranged at the lower part of the contact actuating mechanism, and the armature of the electromagnetic release acts to push the contact actuating mechanism to open.

And a current transformer is arranged at the rear side of the arc extinguish chamber, and an inlet wire socket of the other pole is arranged at the rear side of the current transformer.

And a golden finger slot is arranged between the two inlet wire sockets of the rear side diode of the plug-in circuit breaker.

The contact actuating mechanism is characterized in that the manual handle is rectangular, a manual handle button is arranged at the left end of the manual handle, a connecting rod hole is formed in the right end of the manual handle, a handle connecting rod is arranged in the connecting rod hole and connected with the contact actuating mechanism, a stop block is arranged at the middle upper part of the manual handle, and a wedge block is arranged at the bottom side of the stop block.

The locking mechanism is arranged on the upper portion of the manual handle and comprises an in-place detection piece, an anti-misoperation piece and a disc spring, protruding ends are arranged at one ends of the in-place detection piece and the anti-misoperation piece, a rotating shaft is arranged in the middle of the in-place detection piece and the anti-misoperation piece, a spring mounting shaft is further sleeved outside the rotating shaft of the anti-misoperation piece, the disc spring is sleeved on the spring mounting shaft, two end rods of the disc spring are arranged at the bottoms of the in-place detection piece and the anti-misoperation piece protruding ends and always provide upward elastic force for the in-place detection piece and the anti-misoperation piece protruding ends, when the installation of the plug-in type circuit breaker is not in place, the right-angle edge of the stop gear of the manual handle is jacked by one end of the in-place detection piece and cannot be pushed, the plug-in type circuit breaker cannot be inserted into a cabinet, and only when the plug-in type circuit breaker is installed in place, when the protruding end of the in-place detection piece retracts into the cabinet plate, the manual handle can be pushed to insert the plug-in circuit breaker into the cabinet; when the plug-in circuit breaker is pulled at any position of the plug-in circuit breaker in a closing state, the plug-in circuit breaker cannot be pulled out, only when a manual handle key is pulled, under the action of the stop position inclined side face of the manual handle, the protruding end of the anti-misoperation part retracts into the cabinet body plate, and under the condition that the manual handle is pulled out and the plug-in circuit breaker is opened, the cabinet can be pulled out of the plug-in circuit breaker.

The switching-on and switching-off display mechanism comprises a mounting table, a compression spring is arranged in the center of the mounting table, a switching-on and switching-off display surface is arranged on the left side of the mounting table, a wedge-shaped inclined surface is arranged on the lower portion of the mounting table, when the manual handle is pushed to insert the plug-in circuit breaker into the cabinet to be switched on, the switching-on and switching-off display surface rises under the action of the wedge-shaped block on the bottom side of the manual handle and the wedge-shaped inclined surface on the lower portion of the mounting table, so that a switching-on mark is displayed in the switching-on and switching-off display window on the front side of the plug-in circuit breaker, and when the manual handle is pulled out to enable the plug-in circuit breaker to be switched off, the switching-on and switching-off display surface descends to display a switching-off mark in the switching-on and switching-off display window.

The electric operating mechanism comprises a switching-on motor, a reduction gearbox, a driving wheel, a driven wheel, a switching-on detection switch, a switching-off detection switch, a power-off switch, a switching-off electromagnet and a PCB control panel, wherein the PCB control panel also comprises a communication PCB soft board, the driving wheel is an incomplete gear, a plurality of meshing teeth are arranged at the upper part of the driving wheel, a connecting hole which is connected with an output shaft of the reduction gearbox of the switching-on motor is arranged at the center of the driving wheel, an open groove is arranged at the side surface of the driving wheel, the driven wheel is an incomplete gear, a plurality of meshing teeth are arranged at the upper part of the driven wheel, a triangular shaft hole is arranged at one side of the center of the driven wheel, an open groove is arranged at the side surface of the driven wheel, the reduction gearbox is arranged at the right side of the switching-on motor, the output shaft of the reduction gearbox is connected with the driving wheel, and the incomplete teeth of the driving wheel are meshed with the incomplete teeth of the driven wheel, an electric handle is sleeved outside the triangular shaft at the center of the driven wheel, when the breaker needs to be switched on, the PCB control board gives a closing signal to make the closing motor rotate clockwise and the driving wheel also rotate, the driving wheel meshing teeth drive the driven wheel meshing teeth to rotate anticlockwise to drive the electric handle to rotate anticlockwise, the electric handle closing connecting rod arranged on one side of the electric handle acts to push the contact actuating mechanism to be closed, after the plug-in circuit breaker is switched on, the driving wheel and the driven wheel are separated from the meshing teeth, the driving wheel continues to rotate, the groove inclined plane on one side releases a closing detection switch to detect whether the plug-in circuit breaker is closed in place or not, after the driving wheel continues to rotate for an angle, the power-off position switch is pressed by the inclined plane of the groove on the driving wheel to be disconnected, so that the closing motor is powered off to stop rotating; when the plug-in circuit breaker needs to be opened, the PCB control board gives out an opening signal to enable the opening electromagnet to be electrified, the movable iron core of the opening electromagnet pushes the trip rod of the plug-in circuit breaker to enable the contact actuating mechanism to be opened, the switch at the closing position is released at the moment, the electric handle resets under the action of the torsion spring, and the switch at the opening position is jacked by the inclined plane of the groove of the driving wheel to detect whether the circuit breaker is in place or not.

The wire outgoing mechanism comprises a fastening screw and a wiring cavity which are arranged at the lower part of the front side of the shell, the fastening screw and the wiring cavity are arranged in parallel, an arc isolating plate is arranged between two poles, the arc isolating plate can prevent short circuit of electric arcs between the two poles and is convenient for wiring of the two poles, a compression anti-falling wiring device is arranged in the wiring cavity and comprises a fastening screw, a baffle plate, a connecting plate, a rotating shaft, a wire pressing plate and a mounting bracket, the mounting bracket is rectangular and is provided with a bottom plate and two side plates perpendicular to the bottom plate, a front clamping groove, a rear clamping groove and a shaft hole are respectively arranged on the two side plates, the rotating shaft is arranged in the shaft hole of the mounting bracket, the wire pressing plate is arranged on the rotating shaft and can rotate around the rotating shaft, internal threads are arranged in the middle part of the baffle plate, and the baffle plate is clamped in the front clamping groove of the mounting bracket, the connecting plate is clamped in a rear clamping groove of the mounting bracket, the fastening screw is screwed through the internal thread on the baffle and directly abuts against the force application end of the line pressing plate, the force application end of the line pressing plate is positioned at the lower part of the connecting end of the external lead, the wiring end of the connecting plate is positioned at the upper part of the connecting end of the external lead, when the fastening screw is screwed and is pressed and connected with the external lead, an upward moment can be applied to the external lead at the force application end of the line pressing plate, and the external lead is enabled to obtain an upward pressure and a reverse force for preventing the lead from sliding out.

Further setting, the electromagnetism release be in during plug-in circuit breaker undercurrent specification, adopt iron core coil type electromagnetism release during plug-in circuit breaker heavy current specification, adopt clapper formula electromagnetism release, this kind of setting enables plug-in circuit breaker no matter in undercurrent specification, or in heavy current specification, all have better short circuit protection performance.

Further setting, plug-in circuit breaker uses current transformer when heavy current specification, plug-in circuit breaker when the undercurrent specification, do not use current transformer and use the shunt to carry out the current acquisition, plug-in circuit breaker when undercurrent specification and heavy current specification, the casing be general.

Further setting, plug-in circuit breaker can be as required, select to have electric operating mechanism, the plug-in circuit breaker of taking the communication or do not have electric operating mechanism, do not take the plug-in circuit breaker of communication, have electric operating mechanism, the plug-in circuit breaker of taking the communication and do not have electric operating mechanism, do not take the plug-in circuit breaker of communication, no matter the size of electric current specification, required casing and the inside working of plastics of plug-in circuit breaker are the commonality.

The utility model provides a plug-in circuit breaker, including plug-in circuit breaker, shell and inside accessories, the plug-in circuit breaker of 1P + N is used, and the plug-in circuit breaker is inside or plug-in circuit breaker's outside will the inlet wire end short circuit of inlet wire mechanism, simultaneously two outlet terminals of plug-in circuit breaker leading flank set to an inlet wire end, an outlet terminal, 1P + N plug-in circuit breaker and 1P plug-in circuit breaker used shell and inside accessories are the commonality.

Further setting, the data sampling and the data transmission of the electric operating mechanism, the PCB control panel and the current transformer and the shunt of the plug-in circuit breaker are all passed through the golden finger slot, so that the structure of the plug-in circuit breaker is simplified, the working performance of the plug-in circuit breaker is more stable and reliable, and the use and the maintenance of a user are facilitated.

The plug-in circuit breaker has the advantages that:

the utility model discloses a plug-in circuit breaker standardization level is higher, and the commonality is more, has practiced thrift manufacturing cost, has made things convenient for user's use and maintenance, makes plug-in circuit breaker's performance more reliable and more stable simultaneously. The plug-in circuit breaker has complete specifications and more varieties, and can meet the requirements of various users. The utility model discloses an adopt multinomial technique, if the mechanism of being qualified for the next round of competitions, the line ball board not only can apply for an ascending pressure of external conductor, can give the reverse force of a prevention roll-off of external conductor moreover, make external conductor difficult for droing, fastening screw and wiring chamber dipolar set up side by side, be provided with the flash barrier between the dipolar, can prevent electric arc short circuit between the dipolar, make things convenient for dipolar wiring simultaneously, manual handle's design for divide-shut brake display mechanism and work locking mechanical system simple structure, job stabilization is reliable, in electric operating mechanism, the closing a floodgate and the separating brake respectively become the system, mutual noninterference, in short-circuit protection, different electromagnetic trip ware is selected to heavy current specification and undercurrent specification for the short-circuit protection performance of circuit breaker obtains improving.

Drawings

FIG. 1 is an overall external view of the plug-in circuit breaker of the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

FIG. 3 is a schematic view of the front side structure of FIG. 1;

FIG. 4 is a front plan view of FIG. 1;

FIG. 5 is a view of the mechanism of FIG. 2;

FIG. 6 is a view of the hand lever of FIG. 2;

FIG. 7 is a schematic view of the manual handle locking mechanism of FIG. 2;

FIG. 8 is a schematic view of a non-installed lockout mechanism of the plug-in circuit breaker;

fig. 9 is a schematic view of a plug-in circuit breaker mounted in place locking mechanism;

fig. 10 is a schematic view of a plug-in circuit breaker pull-out locking mechanism;

FIG. 11 is a schematic view of the electric operating mechanism of FIG. 2;

FIG. 12 is a schematic view of the closing motor drive mechanism of FIG. 11;

FIG. 13 is an overall view of the electric operating mechanism of FIG. 2;

FIG. 14 is an internal block diagram of the wire outlet mechanism of FIG. 2;

FIG. 15 is a schematic structural view of the wire-outgoing mechanism of FIG. 2;

FIG. 16 is a plan view of the rear structure of the hidden electric operating mechanism in FIG. 2;

fig. 17 is a plan view of the rear structure of the right side cover of fig. 2.

Detailed Description

It should be noted that the terms "upper part", "middle part", "lower part", "end part", "front part", "rear part", "side part" and the like in the description of the present invention indicate positional relationships based on the drawings, and do not indicate or imply that the designated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The present invention will be further explained with reference to fig. 1 to 17 by way of specific examples.

As shown in fig. 1 and 2, a plug-in circuit breaker includes a housing 1, a wire inlet mechanism 8, a wire outlet mechanism 3, a manual operating mechanism 2, an electric operating mechanism 4, a contact actuating mechanism 5, an arc extinguishing mechanism 6, an overload protection mechanism and a short-circuit protection mechanism 9.

In a further arrangement, the housing 1 is a rectangular hexahedron and is provided with two poles, the housing left base 101 is provided with one pole, the housing right upper cover 102 is provided with one pole, the front side surface is an outgoing line surface, the rear side surface is an incoming line surface, and the right side surface is the side cover 103.

Further, the manual operating mechanism 2 comprises a manual handle 201, a switching-on/off display mechanism 202 and a locking mechanism, the manual handle 201 is arranged on the front side of the upper part of one pole of the left base 101, a manual key 2011 is exposed on the front side of the shell 1, the switching-on/off display mechanism 202 is arranged on the front side of the upper part of the right upper cover 102 of the shell, and the locking mechanism is arranged on the upper part of the manual handle 201.

Further, as shown in fig. 2, 11, 15 and 16, the electric operating mechanism 4 includes a closing motor 406, a separating electromagnet 407 and a PCB control board 401, the PCB control board 401 further includes a PCB soft board 4011, the closing motor 406 is vertically disposed on the left side of the PCB control board 401, the separating electromagnet 407 is horizontally disposed on the lower portion of the PCB control board 401, and the electric operating mechanism 4 is disposed on the rear side of the opening and closing display mechanism 202.

Further, the contact actuating mechanism 5 is arranged at the rear side of the electric operating mechanism 4, an arc guide sheet 601 is arranged between the moving contact and the fixed contact of the electric operating mechanism, and an arc extinguishing chamber 602 is arranged at the rear side of the arc guide sheet 601.

Further, the overload protection mechanism includes a thermal trip bimetallic strip 901, one end of the thermal trip bimetallic strip 901 is connected to the contact actuating mechanism 5 through a connecting rod 9011, and the other end of the thermal trip bimetallic strip 901 is connected to the inlet wire socket 802 of one pole.

Further, the short-circuit protection mechanism comprises an electromagnetic release 902, the electromagnetic release 902 is arranged at the lower part of the contact actuating mechanism 5, and the armature of the electromagnetic release acts to push the contact actuating mechanism 5 to open.

It is further provided that a current transformer 7 is disposed at the rear side of the arc extinguish chamber 602, and an inlet wire socket 801 of the other pole is disposed at the rear side of the current transformer 7.

As shown in fig. 16 and 17, a gold finger slot 803 is further provided between the two

inlet jacks

801 and 802 on the rear side of the plug-in circuit breaker.

In a further arrangement, as shown in fig. 6, the manual handle 201 is rectangular, a manual handle button 2011 is arranged at the left end of the manual handle 201, the manual handle button 2011 is exposed at the front side surface of the first pole 101 of the base, the rest part of the manual handle 201 is arranged inside the first pole 101 of the base, a link hole 2013 is arranged at the right end of the manual handle 201, a handle link 2018 is arranged in the link hole 2013, the handle link 2018 is connected with the contact actuating mechanism 5, a right trapezoid-angled stop 2012 is arranged at the middle upper part of the manual handle 201, and a wedge 2014 is arranged at the bottom side part of the stop.

Further, as shown in fig. 2 and 7, the locking mechanism is disposed on the upper portion of the manual handle 201, and includes an in-place detecting element 203 and an anti-pulling-out preventing element 204, one end of the in-place detecting element 203 is provided with a protruding end 2031, one end of the anti-pulling-out preventing element 204 is provided with a protruding end 2041, the middle portions of the in-place detecting element 203 and the anti-pulling-out preventing element 204 are provided with a rotating shaft 207, the rotating shaft 207 in the middle portion of the anti-pulling-out preventing element is further sleeved with a mounting shaft 206, the mounting shaft 206 is sleeved with a disc spring 205, two end rods 2051 of the disc spring 205 are disposed at the bottom portions of the in-place detecting element and the anti-pulling-out preventing element protruding ends 2031, 2041, the two end rods 2051 of the disc spring 205 always provide an upward elastic force to the in-place detecting element 203 and the anti-pulling-out preventing element 204, when the plug-in-type circuit breaker is not in-place, the face of the manual handle stop 2012 is pushed by one end of the in-place detecting element 203, the plug-in circuit breaker cannot be inserted into the cabinet, and only when the plug-in circuit breaker is installed in place and the protruding end 2031 of the in-place detection piece 203 retracts into the cabinet plate 9, the manual handle 201 can be pushed to insert the plug-in circuit breaker into the cabinet; work as plug-in circuit breaker pull any position of plug-in circuit breaker under the combined floodgate state, plug-in circuit breaker can't extract, only when pulling out manual handle button 2011 under the effect of manual handle stop 2012 sloping face, prevent that the protrusion end 2041 of mistake pulling-out piece retracts the cabinet body board 9 manual handle pull out and under the condition that plug-in circuit breaker opened a floodgate, plug-in circuit breaker below can extract the rack.

Further, as shown in fig. 5, the opening and closing display mechanism 202 comprises a mounting table 2021, a compression spring 2024 is arranged at the center of the mounting table 2021, a switching display surface 2023 is arranged at the left side of the mounting table 2021, the lower part of the mounting table 2021 is provided with a wedge-shaped inclined surface 2022, when the manual handle 201 is pushed to insert the plug-in circuit breaker into the cabinet and is closed, under the action of the wedge 2014 at the bottom side of the manual handle and the wedge-shaped inclined surface 2022 at the lower part of the mounting platform, the opening and closing display surface 2023 rises, therefore, the switching-on mark is displayed in the switching-off and switching-on display window 104 at the front side of the plug-in type circuit breaker, when the manual handle 201 is pulled out to switch off the plug-in type circuit breaker, under the action of the wedge 2014 at the bottom side of the manual handle and the wedge 2022 at the lower part of the mounting table 2021, the opening and closing display surface 2023 is lowered to display the opening and closing mark in the opening and closing display window 104.

Further provided, as shown in fig. 11 to 13, the electric operating mechanism 4 includes a closing motor and reduction box 406, a driving wheel 404, a driven wheel 402, a closing detection switch 4031, a separating detection switch 4032, a power-off switch 4033, a separating electromagnet 407 and a PCB control board 401, the PCB control board 401 further includes a communication PCB flexible board 4011, the driving wheel 404 is an incomplete gear, the upper portion of the driving wheel is provided with a plurality of engaging teeth 4042, the center of the driving wheel is provided with a connecting hole 4043 with an output shaft of the reduction box of the closing motor, the side surface of the driving wheel 404 is provided with an opening groove 4041, the driven wheel 402 is an incomplete gear, the upper portion of the driving wheel is provided with a plurality of engaging teeth 4021, one side of the center of the driven wheel is provided with a triangular shaft hole, the triangular shaft 4023 is arranged in the triangular shaft hole, the side surface of the driven wheel is provided with an opening groove 4022, the right side of the closing motor is provided with a reduction box 4061, an output shaft of the reduction box 4061 is connected with a driving wheel 404, incomplete teeth 4042 of the driving wheel 404 are meshed with incomplete teeth 4021 of a driven wheel 2, an electric handle 405 is sleeved outside a triangular shaft at the center of the driven wheel, when a circuit breaker needs to be switched on, a PCB control board 401 gives a switching-on signal to enable a switching-on motor 406 to rotate clockwise, the driving wheel 404 also rotates, meshing teeth 4042 on the driving wheel 404 drive meshing teeth 4021 on the driven wheel 402 to rotate anticlockwise to drive the electric handle 405 to rotate anticlockwise, a switching-on connecting rod 4028 arranged on one side of the electric handle 405 acts to push the contact actuating mechanism 5 to be switched on, after the plug-in circuit breaker is switched on, the meshing teeth 4042 on the driving wheel 404 are separated from the meshing teeth 4021 on the driven wheel 402, the driving wheel 404 is separated from the driven wheel 402, and at this time, a groove inclined surface 4022 on one side of the driven wheel presses against the switching-on detection switch 4031 to be closed, to detect whether the plug-in circuit breaker is switched on in place, after the driving wheel 404 continues to rotate for an angle, the power-off position switch 4033 is pressed by the groove inclined plane 4041 on the driving wheel to be disconnected, so that the switching-on motor 406 is powered off and stops rotating; when the plug-in circuit breaker needs to be opened, the PCB control board 401 gives an opening signal to enable the opening electromagnet 407 to be powered on, the movable iron core 4071 of the opening electromagnet pushes the tripping rod 501 of the contact actuating mechanism of the plug-in circuit breaker to enable the contact actuating mechanism 5 to be opened, at the moment, the closing position switch 4031 is released to be powered off, the electric handle is reset under the action of the torsion spring, and the opening position switch 4032 is pressed and closed by the groove inclined plane 4022 of the driven wheel to detect whether the circuit breaker is in place for opening.

Further, as shown in fig. 1, 4, 14 and 15, the outlet mechanism 3 includes a fastening screw 301 and a wiring cavity 302 arranged at the lower part of the front side of the housing, the two poles of the fastening screw 301 and the wiring cavity 302 are arranged side by side, an arc-separating plate 305 is arranged between the two poles, a pressing and anti-dropping wiring device is arranged in the wiring cavity 302, which includes the fastening screw 301, a baffle 3022, a connecting plate 3023, a rotating shaft 304, a wire pressing plate 303 and a mounting bracket 3021, the mounting bracket 3021 is rectangular, and is provided with a bottom plate and two side plates perpendicular to the bottom plate, a front clamping groove 30211, a rear clamping groove 30212 and a shaft hole 3024 are respectively arranged on the two side plates, the rotating shaft 304 is arranged in the shaft hole 3024 of the mounting bracket, the wire pressing plate 303 is arranged on the rotating shaft 304 and can rotate around the rotating shaft 304, an internal thread is arranged at the middle part of the baffle 3022, the baffle 3022 is clamped in the front clamping groove 30211 of the mounting bracket, the connecting plate 3023 is clamped in the rear clamping groove 30212 of the mounting bracket, the fastening screw 301 is screwed through the internal thread on the baffle 3022 and directly abuts against the force application end 3031 of the wire pressing plate 303, the force bearing end 3032 of the wire pressing plate is positioned at the lower part of the external lead connecting end, the terminal of the connecting plate 3023 is positioned at the upper part of the external lead connecting end, when the fastening screw 301 is screwed to press the external lead, an upward moment is applied to the external lead at the force bearing end 3032 of the wire pressing plate 303, so that the external lead obtains an upward pressure and a reverse force for preventing the lead from sliding out.

In a further arrangement, as shown in fig. 16, the electromagnetic release 902 adopts an iron core coil type electromagnetic release when the plug-in circuit breaker has a low current specification below 20 amperes, and adopts a clapper type electromagnetic release when the plug-in circuit breaker has a high current specification above 20 amperes, so that the plug-in circuit breaker has better short circuit protection performance.

Further setting, plug-in circuit breaker uses current transformer when the heavy current specification more than 20 amperes, plug-in circuit breaker when the low current specification below 20 amperes, do not use current transformer and use the shunt to carry out the current acquisition, plug-in circuit breaker when low current specification and heavy current specification, the casing be the commonality.

Further setting, as shown in fig. 1 and fig. 17, two wire inlet ends 801 and 802 of the wire inlet mechanism are short-circuited inside the plug-in circuit breaker or outside the plug-in circuit breaker, meanwhile, a wire outlet end on the left side of the front side of the plug-in circuit breaker is set as a wire inlet end, a wire outlet end on the right side of the front side of the plug-in circuit breaker is set as a wire outlet end, and the shell and internal spare and accessory parts used by the 1P + N plug-in circuit breaker and the 1P plug-in circuit breaker are common parts.

Further setting, the data sampling and data transmission of the electric operating mechanism 4, the PCB control panel 401, the current transformer 7 and the shunt of the plug-in circuit breaker are all carried out through the golden finger slot 803, so that the structure of the plug-in circuit breaker is simplified, the working performance of the plug-in circuit breaker is more stable and reliable, and the use and maintenance of users are facilitated.

It should be noted that: the above examples are given solely for the purpose of illustrating the invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that many more modifications and variations than mentioned above may be made without departing from the scope of the invention.

Claims

1. A plug-in circuit breaker comprises a shell, a wire inlet mechanism, a wire outlet mechanism, a manual operating mechanism, an electric operating mechanism, a contact actuating mechanism, an arc extinguishing mechanism, an overload protection mechanism and a short circuit protection mechanism;

the method is characterized in that:

the shell is a rectangular hexahedron, the front side surface is a wire outlet surface, the rear side surface is a wire inlet surface and is provided with two poles, the left side is a base first pole, the right side is an upper cover first pole, and the right side of the shell is a side cover;

the manual operating mechanism comprises a manual handle, a switching-on and switching-off display mechanism and a locking mechanism, the manual handle is arranged on the front side of the upper part of one pole of the left side base of the shell, the switching-on and switching-off display mechanism is arranged on the front side of the upper part of one pole of the right side upper cover of the shell, and the locking mechanism is arranged on the upper part of the manual handle;

the electric operating mechanism comprises a closing motor, a separating electromagnet and a PCB control board, wherein the closing motor is vertically arranged on the left side of the PCB control board, the separating electromagnet is horizontally arranged on the lower part of the PCB control board, and the electric operating mechanism is arranged on the rear side of the separating and closing display mechanism;

the contact actuating mechanism is arranged at the rear side of the electric operating mechanism, an arc guide sheet is arranged between a moving contact and a fixed contact of the electric operating mechanism, and an arc extinguishing chamber is arranged at the rear side of the arc guide sheet;

the overload protection mechanism comprises a thermal tripping bimetallic strip, one end of the thermal tripping bimetallic strip is connected with the contact actuating mechanism through a connecting rod, and the other end of the thermal tripping bimetallic strip is connected with an inlet wire socket of one pole;

the short-circuit protection mechanism comprises an electromagnetic trip, and the electromagnetic trip is arranged at the lower part of the contact actuating mechanism;

a current transformer is arranged at the rear side of the arc extinguish chamber, and an inlet wire socket of the other pole is arranged at the rear side of the current transformer;

and a golden finger slot is arranged between the two inlet wire sockets at the rear side of the plug-in circuit breaker.

2. Plug-in circuit breaker according to claim 1, characterized in that: the manual handle set up to rectangle, the left end be provided with manual handle button, the right-hand member is provided with the connecting rod hole, the downthehole handle connecting rod that is provided with of connecting rod, the handle connecting rod with contact actuating mechanism link to each other, manual handle well upper portion be provided with right angle trapezoidal form and end the position fender, the bottom side portion of ending the position fender is provided with the wedge piece.

3. The plug-in circuit breaker of claim 1, wherein: the locking mechanism is arranged on the upper portion of the manual handle, the locking mechanism comprises an in-place detection piece, an anti-misoperation piece and a disc spring, protruding ends are arranged at one ends of the in-place detection piece and the anti-misoperation piece, a rotating shaft is arranged in the middle of the in-place detection piece and the anti-misoperation piece, a spring mounting shaft is sleeved outside the rotating shaft of the anti-misoperation piece, the disc spring is sleeved on the spring mounting shaft, two end rods of the disc spring are arranged at the bottoms of the in-place detection piece and the anti-misoperation protruding end, upward elastic force is always provided for the in-place detection piece and the anti-misoperation protruding end, when the installation of the plug-in circuit breaker is not in place, a right-angle surface of a stop gear of the manual handle is propped against one end of the in-place detection piece and cannot be pushed, the plug-in circuit breaker cannot be inserted into a cabinet and only can the plug-in circuit breaker be installed in place, when the protruding end of the in-place detection piece retracts into the cabinet plate, the manual handle can be pushed to insert the plug-in circuit breaker into the cabinet; when the plug-in circuit breaker is pulled at any position of the plug-in circuit breaker in a closing state, the plug-in circuit breaker cannot be pulled out, only when a manual handle key is pulled, under the action of the stop position inclined side face of the manual handle, the protruding end of the anti-misoperation part retracts into the cabinet body plate, and under the condition that the manual handle is pulled out and the plug-in circuit breaker is opened, the cabinet can be pulled out of the plug-in circuit breaker.

4. The plug-in circuit breaker of claim 1, wherein: the switching display mechanism comprises a mounting table, a compression spring is arranged at the center of the mounting table, a switching display surface is arranged on the left side of the mounting table, a wedge-shaped inclined surface is arranged on the lower portion of the mounting table, when the manual handle is pushed to insert the plug-in circuit breaker into the cabinet to be switched on, the switching display surface rises under the action of the wedge-shaped block on the bottom side of the manual handle and the wedge-shaped inclined surface on the lower portion of the mounting table, so that a switching mark is displayed in the switching display window on the front side of the plug-in circuit breaker, and when the manual handle is pulled out to enable the plug-in circuit breaker to be switched off, the switching display surface descends to display a switching mark in the switching display window.

5. The plug-in circuit breaker of claim 1, wherein: the electric operating mechanism comprises a closing motor, a reduction gearbox, a driving wheel, a driven wheel, a closing position switch, an opening position switch, a power-off switch, an opening electromagnet and a PCB control panel, wherein the PCB control panel also comprises a communication PCB soft board, the driving wheel is an incomplete gear, the upper part of the driving wheel is provided with a plurality of meshing teeth, the center of the driving wheel is provided with a connecting hole with an output shaft of the reduction gearbox of the closing motor, the side surface of the driving wheel is provided with an opening groove, the driven wheel is an incomplete gear, the upper part of the driven wheel is provided with a plurality of meshing teeth, one side of the center of the driven wheel is provided with a triangular shaft hole, the side surface of the driven wheel is provided with an opening groove, the right side of the closing motor is provided with the reduction gearbox, the output shaft of the reduction gearbox is connected with the driving wheel, the incomplete teeth of the driving wheel are meshed with the incomplete teeth of the driven wheel, and an electric handle is sleeved outside the triangular shaft at the center of the driven wheel, when the circuit breaker needs to be switched on, the PCB control board gives a switching-on signal to enable the switching-on motor to rotate clockwise and the driving wheel to rotate, the driving wheel meshing teeth drive the driven wheel meshing teeth to rotate anticlockwise to drive the electric handle to rotate anticlockwise, the electric handle switching-on connecting rod arranged on one side of the electric handle acts to push the contact actuating mechanism to be switched on, after the plug-in circuit breaker is switched on, the driving wheel and the driven wheel are separated, the groove inclined plane on one side of the driven wheel pushes the switching-on position switch to be closed, whether the plug-in circuit breaker is switched on or not is detected, and after the driving wheel continuously rotates for an angle, the power-off position switch is pushed by the groove inclined plane on the driving wheel to be disconnected, so that the switching-on motor is powered off and stops rotating; when the plug-in circuit breaker needs to be opened, the PCB control board gives out an opening signal to enable the opening electromagnet to be electrified, the movable iron core of the opening electromagnet pushes the tripping rod of the plug-in circuit breaker to enable the contact actuating mechanism to be opened, the switch at the closing position is loosened to cut off the power, the electric handle is reset under the action of the torsion spring, and the switch at the opening position is pressed and closed by the inclined plane of the groove of the driven wheel to detect whether the plug-in circuit breaker is in place.

6. The plug-in circuit breaker of claim 1, wherein: the wire outlet mechanism comprises a fastening screw and a wiring cavity which are arranged at the lower part of the front side of the shell, the fastening screw and the wiring cavity are arranged in parallel, an arc-isolating plate is arranged between the two poles, a compression anti-drop wiring device is arranged in the wiring cavity and comprises the fastening screw, a baffle plate, a connecting plate, a rotating shaft, a wire pressing plate and a mounting bracket, the mounting bracket is rectangular and is provided with a bottom plate and two side plates vertical to the bottom plate, a front clamping groove, a rear clamping groove and a shaft hole are respectively arranged on the two side plates, the rotating shaft is arranged in the shaft hole of the mounting bracket, the wire pressing plate is arranged on the rotating shaft and can rotate around the shaft, an internal thread is arranged at the middle part of the baffle plate, the baffle plate is clamped in the front clamping groove of the mounting bracket, the connecting plate is clamped in the rear clamping groove of the mounting bracket, and the fastening screw directly abuts against the force application end of the wire pressing plate through the internal thread on the baffle plate, the stress end of the line pressing plate is located at the lower portion of the external lead access end, the wiring end of the connecting plate is located at the upper portion of the external lead access end, when the fastening screw is screwed and the external lead is in crimping connection, an upward moment can be applied to the external lead at the stress end of the line pressing plate, and the external lead is enabled to obtain an upward pressure and a reverse force for preventing the lead from sliding out.

7. The plug-in circuit breaker of claim 1, wherein: the electromagnetic release is in when plug-in circuit breaker undercurrent specification, adopt iron core coil formula electromagnetic release, when heavy current specification, adopt clapper formula electromagnetic release, plug-in circuit breaker when heavy current specification and undercurrent specification, the casing be the commonality.

8. The plug-in circuit breaker of claim 1, wherein: the plug-in circuit breaker uses current transformer when the heavy current specification, plug-in circuit breaker when the undercurrent specification, do not use current transformer and use the shunt to carry out the current acquisition, plug-in circuit breaker heavy current specification and undercurrent specification, the casing be general.

9. The plug-in circuit breaker of claim 1, wherein: the plug-in circuit breaker can select to have electric operating mechanism, the plug-in circuit breaker of taking the communication or not have electric operating mechanism, the plug-in circuit breaker who does not take the communication as required, the plug-in circuit breaker that have electric operating mechanism, take the plug-in circuit breaker of communication and not have electric operating mechanism, do not take the plug-in circuit breaker of communication, no matter the size of electric current specification, required casing and the inside working of plastics of plug-in circuit breaker are the commonality.

10. The plug-in circuit breaker of claim 1, wherein: will the inlet wire end short circuit of the inside or the outside inlet wire mechanism of plug-in circuit breaker, simultaneously two outlet terminals of plug-in circuit breaker leading flank set to an inlet wire end, an outlet terminal, plug-in circuit breaker can realize that used shell and inside accessories of 1P + N and 1P are the commonality.

11. The plug-in circuit breaker of claim 1, wherein: the data sampling and data transmission of the electric operating mechanism, the PCB control panel, the current transformer and the shunt of the plug-in circuit breaker are all carried out through the golden finger slot.