CN116137214A

CN116137214A - Circuit breaker

Info

Publication number: CN116137214A
Application number: CN202310294135.2A
Authority: CN
Inventors: 刘亚南; 张莹; 韦尚靖; 姜维平; 徐永富; 甘新华; 白晓康; 吴慜翔; 何华远
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-05-19

Abstract

The application provides a circuit breaker, including: the shell comprises a base, a middle cover and an upper cover; the middle cover is arranged on the base, and the upper cover is arranged on the middle cover and encloses to define a containing space; the operation structure is arranged in the accommodating space; the first circuit board assembly is arranged between the base and the middle cover, is electrically connected with the operation structure and is used for collecting working parameters of the operation structure; the second circuit board assembly is arranged on the upper cover and is electrically connected with the first circuit board assembly; the protection module is detachably connected to the upper cover and is electrically connected with the second circuit board assembly; the reinforcing module is detachably connected to the middle cover, is arranged corresponding to the first circuit board assembly and is electrically connected with the first circuit board assembly; the enhancement module is electrically connected with the protection module. The application aims to solve the technical defect that the later maintenance of the circuit breaker is difficult in the prior art.

Description

Circuit breaker

Technical Field

The application relates to the technical field of low-voltage equipment, in particular to a circuit breaker.

Background

The circuit breaker is widely used in power transmission and distribution circuits and plays a role in controlling and protecting the circuits. The existing circuit breaker mostly adopts an integral structure, has a simple structure, is difficult to maintain in the later period, and is not suitable for the development trend of the electric power Internet of things and the intellectualization of the circuit breaker.

Disclosure of Invention

The application provides a circuit breaker, aims at solving the technical defect that the later maintenance of the existing circuit breaker is difficult.

A circuit breaker, comprising:

the shell comprises a base, a middle cover and an upper cover; the middle cover is arranged on the base, and the upper cover is arranged on the middle cover and encloses a containing space;

the operation structure is arranged in the accommodating space;

the first circuit board assembly is arranged between the base and the middle cover, is electrically connected with the operation structure and is used for collecting working parameters of the operation structure;

the second circuit board assembly is mounted on the upper cover and is electrically connected with the first circuit board assembly;

the protection module is detachably connected to the upper cover and is electrically connected with the second circuit board assembly; and

the reinforcing module is detachably connected to the middle cover, corresponds to the first circuit board assembly and is electrically connected with the first circuit board assembly.

Optionally, the middle cover is provided with a first jack; the first circuit board assembly comprises a first power strip which is embedded into the first jack;

A first accommodating cavity is formed on one side of the middle cover, which is away from the first circuit board assembly, and the first accommodating cavity is communicated with the first jack;

the reinforcing module is arranged in the first accommodating cavity; the enhancement module includes a first pin that is inserted into the first receptacle.

Optionally, the first accommodating cavity is provided with a first cavity opening; the circuit breaker further comprises a transparent cover, wherein the transparent cover is detachably connected to the middle cover and covers the first cavity opening;

and a first status indicator lamp is arranged on one side of the reinforcing module, which faces the transparent cover.

Optionally, a plug structure is formed on two opposite sides of the reinforcing module.

Optionally, a guide groove is formed on the reinforcing module; the first accommodating cavity is provided with a cavity wall provided with a guide convex strip which is in sliding fit with the guide groove.

Optionally, the enhancement module further has a plug receiving slot and a plug located in the plug receiving slot; the transparent cover is provided with a first opening, and the plug accommodating groove and the plug are exposed from the first opening.

Optionally, the operation structure includes an output terminal for outputting an operation parameter of the operation structure;

The first circuit board assembly includes a first circuit board and a housing; the first circuit board is arranged in the housing; the housing is mounted on the base and/or the middle cover; the housing is provided with a collection notch, and the output terminal is electrically connected with the first circuit board through the collection notch.

Optionally, the first circuit board assembly further includes a side plug terminal base, and the side plug terminal base is disposed on the first circuit board;

the housing is provided with a second opening; a third opening is formed on the base, or a third opening is formed on the middle cover, or the base and the middle cover together define the third opening; the second opening and the third opening are correspondingly arranged and are used for exposing the side plug terminal seat.

Optionally, the first circuit board assembly further includes a dust plug, and the dust plug is sleeved on the side plug terminal base.

Optionally, the operation structure further comprises a temperature measuring device, wherein the temperature measuring device comprises a temperature measuring circuit board and a temperature measuring piece; the output terminal comprises a temperature measurement terminal; the housing is provided with a temperature acquisition notch, and the temperature measuring terminal is electrically connected with the first circuit board through the temperature acquisition notch; the temperature measuring terminal is connected with the temperature measuring circuit board through a wire; the temperature measuring part is welded on the temperature measuring circuit board, or the lead wire passes through a round hole on the temperature measuring circuit board, so that the temperature measuring part is fixed on the temperature measuring circuit board.

Optionally, a temperature measuring hole is formed in one side, away from the middle cover, of the base; the temperature measuring piece stretches into the temperature measuring hole and is abutted with the wiring board of the operation structure; the temperature measuring circuit board is fixed on the base and compresses the temperature measuring piece.

Optionally, the circuit breaker further includes a bottom plate, the bottom plate with the base deviates from the side of well lid is connected, temperature measuring device set up in between the bottom plate with the base.

Optionally, the operation structure comprises a reclosing mechanism, a release, an indicating mechanism and an operation mechanism;

the reclosing mechanism, the release and the indicating mechanism are arranged in the accommodating space defined by the middle cover and the upper cover; the operating mechanism is arranged in the accommodating space defined by the middle cover and the base; the reclosing mechanism is matched with a handle of the operating mechanism;

the indicating mechanism is in power connection with the reclosing mechanism and is used for indicating the opening and closing state of the reclosing mechanism;

the release is arranged on the reclosing mechanism and is configured to be matched with a traction rod of the operating mechanism;

an indication notch for observing the indication mechanism is formed in the upper cover;

The protection module is provided with a first button corresponding to the traction rod, a first operation notch corresponding to the reclosing mechanism and an observation window corresponding to the indication notch.

Optionally, a second accommodating cavity communicated with the indication notch is formed on one side of the upper cover, which faces away from the base; the second accommodating cavity is provided with a second cavity opening;

the second circuit board assembly is arranged in the second accommodating cavity; the protection module covers the second cavity opening.

Optionally, the second circuit board assembly further includes:

the second circuit board is arranged in the second accommodating cavity;

the second power strip is arranged on the second circuit board;

the cover plate is covered on the second circuit board; the cover plate is provided with a second jack, and the second jack is arranged corresponding to the second power strip so as to expose the second power strip;

the protection module comprises a second contact pin, and the second contact pin is inserted into the second contact strip.

Optionally, the protection module includes:

the first shell is fixedly connected with the second shell to define a third accommodating cavity; the first shell is provided with an indication hole, and the indication hole is arranged corresponding to the observation window and the indication notch;

The controller is arranged in the third accommodating cavity; the controller includes the second pin; and

the human-computer interaction assembly is arranged in the third accommodating cavity; the man-machine interaction assembly comprises a second button for inputting a control signal to the controller; the observation window is arranged on the man-machine interaction assembly.

Optionally, the first circuit board assembly further comprises a connecting wire, and the upper cover is provided with a wire hole communicated with the second accommodating cavity; the connecting wire extends into the second accommodating cavity through the wire hole and is electrically connected with the second circuit board assembly.

Optionally, a third button corresponding to the first button is arranged on the middle cover, and the third button is corresponding to the traction rod and configured to trigger the traction rod to drive the circuit breaker to trip when the traction rod is pressed by the first button.

Optionally, the operating mechanism further comprises a driving mechanism, wherein the driving mechanism comprises a driving piece, a ratchet wheel and a main shaft sleeve; the driving piece is configured to drive the ratchet wheel to rotate; the main shaft sleeve is provided with a telescopic limiting shaft, and the telescopic limiting shaft is abutted against the inner peripheral surface of the ratchet wheel; the main shaft sleeve is matched with the reclosing mechanism to drive the reclosing mechanism to realize opening and closing.

Optionally, the enhancement module is electrically connected with the protection module.

In the technical scheme of the embodiment of the application, the first circuit board assembly is arranged between the base and the middle cover so as to collect working parameters of the operation structure; the protection module is electrically connected with the first circuit board assembly through the second circuit board assembly, and the enhancement module corresponds to the first circuit board assembly and is electrically connected with the first circuit board assembly. The enhancement module and the protection module are respectively detachably arranged on the middle cover and the upper cover, so that the circuit breaker has the characteristic of compact structure after being added with the functional module, and can be plugged in and out in an electrified way when a fault occurs or according to actual needs, thereby being beneficial to replacement or maintenance; in addition, in the embodiment, as the first circuit board assembly is arranged between the base and the middle cover, electronic components with strong reliability can be intensively arranged in the first circuit board assembly after test screening, thereby ensuring the synchronization of the service life of the secondary side and the service life of the primary side and providing sufficient conditions for electromechanical separation. In summary, after the breaker disclosed by the embodiment of the application fails, the protection module and the enhancement module can be disassembled and replaced quickly, so that the difficulty in maintenance and repair of the breaker is reduced, and the safety and reliability of the breaker are improved effectively.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded schematic view of a circuit breaker provided in an embodiment of the present application;

fig. 2 is a schematic diagram of the overall structure of the circuit breaker provided in the embodiment of the present application;

fig. 3 is a schematic structural diagram of a first circuit board assembly provided in an embodiment of the present application;

fig. 4 is an exploded schematic view of a circuit breaker bottom provided in an embodiment of the present application;

fig. 5 is an exploded schematic view of a protection module of a circuit breaker provided in an embodiment of the present application;

fig. 6 is a schematic diagram of the overall structure of a protection module of the circuit breaker provided in the embodiment of the present application;

fig. 7 is a schematic plan view of a circuit breaker according to an embodiment of the present disclosure;

fig. 8 is an exploded schematic view of a driving mechanism and a reclosing mechanism of the circuit breaker according to the embodiment of the present application.

List of reference numerals

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Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

As shown in fig. 1, the circuit breaker includes a housing 11 and an operating structure 12 disposed inside the housing 11. The housing 11 generally includes a bottom plate 111, a base 112, a middle cover 113, and an upper cover 114. The middle cover 113 is mounted on the base 112, and the upper cover 114 is mounted on the middle cover 113 and encloses a receiving space. The operating structure 12 is installed in the accommodating space.

To facilitate an understanding of the technical solution of the present application, the operating structure 12, the actuating member of the circuit breaker, is first briefly described. As shown in connection with fig. 1 and 4, the operating structure 12 generally includes a reclosing mechanism 121, a driving mechanism 122, an indicating mechanism 123 and a release 124 mounted between the middle cover 113 and the upper cover 114, an arc extinguishing chamber 125, a contact mechanism 126, an operating mechanism 127, a fast electromagnet 128, a wiring board 129 and a transformer assembly 1210 mounted between the base plate 111 and the base 112, a power take-off line 1211 and a temperature measuring device 1212 mounted between the base 112 and the middle cover 113.

As shown in fig. 1 and 8, the upper portion of the base 112 is generally divided into 4 cavities; the arc extinguishing chamber 125 and the contact mechanism 126 are correspondingly arranged in 3 cavities, and the rotating shaft of the operating mechanism 127 is erected on the partition boards of the 3 adjacent cavities; there are also 1 cavity for accommodating the DC motor 122a and the reduction gearbox 122b of the driving mechanism 122; the support of the operating mechanism 127 is fixed on the base 112 through screws, the handle of the operating mechanism 127 extends out of the rectangular groove 113d of the middle cover 113 and is inserted into the sliding groove on the linkage sliding plate 121e of the reclosing mechanism 121, and pushing parts 121e1 are arranged on the upper side and the lower side of the sliding groove, so that the linkage sliding plate 121e is tightly matched with the handle, and the handle moves in place. The tail part of the cavity where the contact mechanism 126 is positioned is also provided with a quick electromagnet 128 which is matched with the traction rod, so that the response speed when the contact mechanism is subjected to high-current impact is accelerated, and the safety performance is improved. The transformer assembly 1210 is installed at the lower portion of the base 112, and the transformer assembly 1210 includes a transformer 1210a and a transformer housing 1210b for installing the transformer 1210a, wherein the transformer 1210a includes a protection transformer, a metering transformer and a zero sequence transformer from top to bottom; each phase of the protection transformer is provided; the metering transformer is not arranged in N phases, and the protection transformer and the metering transformer are arranged in the same transformer housing, so that the structure is compact. The upper and lower ends and the middle part of the base 112 are provided with wiring boards 129 which are positioned at the bottom of the quick electromagnet 128; the fixed contact of the contact mechanism 126 is fixedly connected with the wiring board 129 positioned at the upper part, the movable contact on the rotating shaft can be connected with the wiring board at the middle part through soft connection, and the wiring board at the middle part passes through the transformer assembly 1210 to be connected with the wiring board at the lower part through soft connection, thereby being beneficial to sub-installation and providing electricity taking points. In some embodiments, the movable contact can also be directly connected with the wiring board at the lower part through soft connection, so that the structure is optimized, and the temperature rise is reduced.

Wherein, reclosing mechanism 121 cooperates with the handle on operating mechanism 127 to realize the state switching to the circuit breaker divide-shut brake. The driving mechanism 122 is used for transmitting power to the reclosing mechanism 121, and driving the reclosing mechanism 121 to switch the opening state and the closing state of the circuit breaker. The trip unit 124 cooperates with a drawbar of the operating mechanism 127 for switching the tripped state and the rebuckled state of the circuit breaker. The indication mechanism 123 is linked with the operation mechanism 127 to indicate the opening and closing state of the circuit breaker.

In general, as shown in fig. 8, the reclosing mechanism 121 includes a positioning column 121a, a micro switch 121b, a swivel base 121c, a hexagon socket screw 121d, a linkage slide plate 121e, a bearing 121f, a connecting shaft 121g, and an upper support 121h. The positioning posts 121a are inserted into the left and right through holes of the linkage slide plate 121e, so that the left and right, front and rear four degrees of freedom of the linkage slide plate 121e are limited. The micro switch 121b is mounted on the upper support 121h for feeding back an electrical signal to a controller on the protection module 21 of the circuit breaker when the reclosing mechanism 121 reaches a designated position. The rotary seat 121c is matched with the spindle sleeve 122f, and the matching is tight, so that the driving mechanism 122 can be easily and timely linked. The inner hexagonal fastening screw 121d passes through the shaft sleeve, the elastic sheet and the flat pad and then is fixed in the main shaft sleeve 122f in a clockwise rotation manner, and the connecting fastening and combined shaft sleeve reduces the friction force between the shaft and the seat, so that the manual operation is convenient. The upper part of the connecting shaft 121g is tightly matched with the bearing 121f, the lower part of the connecting shaft 121g is fastened to the swivel base 121c through riveting, and the connecting shaft 121g and the bearing 121f adopt a compound riveting assembly mode, so that abrasion during transmission is effectively reduced, and the connecting shaft and the bearing 121f can flexibly rotate. The upper supporter 121h is fixed to the middle cover 113 by screws. The right middle side of the upper cover 114 is correspondingly provided with a second operation notch 114a so as to expose the inner hexagonal fastening screw 121d, thereby being convenient for manually switching the state of opening and closing the circuit breaker.

In the embodiment of the present application, as shown in fig. 8, the driving mechanism 122 includes a dc motor 122a, a reduction gearbox 122b, a reduction gearbox external gear 122c, a lower support 122d, a ratchet 122e, and a spindle sleeve 122f. The direct current motor 122a and the reduction gearbox 122b adopt a vertical combination mode to form a driving piece, and are tightly matched through two fastening screws, so that the space is saved, and the safety and reliability are realized. The external gear of the reduction gearbox 122c is connected with the reduction gearbox 122b, the reduction gearbox 122b provides torque, the torque is output to the ratchet wheel 122e through the external gear of the reduction gearbox 122c, the ratchet wheel 122e is linked with the rotating seat 121c, the linkage sliding plate 121e is driven to directly perform opening and closing motions, and the torque output is stable and the transmission efficiency is high. The inside of the main shaft sleeve 122f adopts a telescopic limiting shaft, and an extension spring is contained in the main shaft sleeve, so that the telescopic quantity can be conveniently adjusted in time according to the transmission state of the reclosing mechanism 121. The lower support 122d is provided with through holes corresponding to the fixing holes of the reduction gearbox 122b and the external gear of the reduction gearbox 122c, respectively, and the upper support 121h is fixed with the lower support 122d and the reduction gearbox 122b through screw sleeve bushings. As shown in fig. 7, a circular groove 113a is provided on the right side of the middle cover 113, so that the reduction gearbox of the

dc motors

122a and 122b can be placed downward.

As shown in fig. 1, the indication mechanism 123 is divided into an indication member 123a and an indication push rod 123b, and the indication member 123a is positioned on the reclosing mechanism 121 side by a positioning pin. The reset torsion spring is sleeved on the positioning pin, one end of the reset torsion spring is propped against the indicating piece 123a, and the other end of the reset torsion spring is inserted on the upper support of the upper support 121 h. The lower end of the indicating push rod 123b abuts against the rotating shaft of the operating mechanism 127 in the base 112, the upper end of the indicating push rod extends out through a round hole 113b on the middle cover 113, a pressing rod is inserted into the upper end of the indicating push rod 123b to act on the indicating piece 123a, and a reset pressing spring is sleeved between a boss at the bottom of the indicating push rod and the middle cover 113. Along with the change of the rotating shaft position in the reclosing process of the circuit breaker, the indicating push rod 123b is matched with a reset spring to drive the indicating piece 123a to rotate, so that the indicating piece 123a displays corresponding opening and closing conditions. The upper cover 114 is provided with an indication notch 114b on the left upper part to expose the indication piece 123a for convenient observation.

Referring to fig. 1 and fig. 7, the release 124 is fixed on one side of the upper support 121h by a screw, and the middle cover 113 is provided with a T-shaped slot 113c, so that a tail ejector rod of the release 124 passes through the middle cover 113 to be matched with a traction rod of the operating mechanism 127. The release can promote the traction lever to switch between a release state and a rebuckling state under the action of external force.

The circuit breaker that this application proposed aims at providing the intelligent reclosing circuit breaker of a distributed overall arrangement to solve among the prior art reclosing circuit breaker control module, protection module etc. electronic component dismouting complicacy, the wiring is chaotic, and assembly cost is high, the inconvenient technical problem of later stage product maintenance. By means of the above examples of the operating structure in the embodiments, the structural relationship among the protection module, the enhancement module and the operating structure of the circuit breaker is emphasized to overcome the deficiencies in the prior art.

In an embodiment, referring to fig. 1 and 2, the circuit breaker includes:

a housing 11, the housing 11 including a base 112, a middle cover 113, and an upper cover 114; the middle cover 113 is mounted on the base 112, and the upper cover 114 is mounted on the middle cover 113 and encloses a containing space;

an operation structure 12, wherein the operation structure 12 is installed in the accommodating space;

The first circuit board assembly 24 is installed between the base 112 and the middle cover 113, and is electrically connected with the operating structure 12, and is used for collecting working parameters of the operating structure 12;

a second circuit board assembly 23, wherein the second circuit board assembly 23 is mounted on the upper cover 114 and electrically connected with the first circuit board assembly 24;

a protection module 21, wherein the protection module 21 is detachably connected to the upper cover 114 and electrically connected to the second circuit board assembly 23; and

the reinforcing module 22 is detachably connected to the middle cover 113, and is disposed corresponding to the first circuit board assembly 24 and electrically connected to the first circuit board assembly 24.

In the technical solution of the embodiment of the present application, the first circuit board assembly 24 is installed between the base 112 and the middle cover 113 to collect the working parameters of the operating structure 12; the protection module 21 is electrically connected to the first circuit board assembly 24 through the second circuit board assembly 23, and the reinforcement module 22 corresponds to the first circuit board assembly 24 and is electrically connected to the first circuit board assembly 24. The reinforcing module 22 and the protecting module 21 are respectively detachably arranged on the middle cover 113 and the upper cover 114, so that the circuit breaker has the characteristic of compact structure after being additionally provided with the functional module, and can be plugged in and out in an electrified manner when a fault occurs or according to actual needs, thereby being beneficial to replacement or maintenance; in addition, in the embodiment, since the first circuit board assembly 24 is installed between the base 112 and the middle cover 113, the electronic components with strong reliability can be intensively arranged in the first circuit board assembly 24 after test and screening, so that the service life synchronization of the secondary side and the secondary side is ensured, and sufficient conditions are provided for electromechanical separation. In summary, after the breaker in the embodiment of the present application fails, the protection module 21 and the enhancement module 22 can be removed and replaced quickly, so as to reduce the difficulty of maintenance and repair in the subsequent stage, and effectively improve the safety and reliability of the breaker.

As an alternative implementation of the above embodiment, the middle cover 113 is provided with a first insertion hole; the first circuit board assembly 24 includes a first power strip, and the first power strip is embedded in the first jack; a first accommodating cavity is formed on one side of the middle cover 113, which faces away from the first circuit board assembly 24, and the first accommodating cavity is communicated with the first jack; the reinforcing module 22 is installed in the first accommodating cavity; the enhancement module 22 includes a first pin that is inserted into the first receptacle. The size and shape of the first receiving chamber are not particularly limited, and it is adapted to the size and shape of the reinforcement module 22, so that the reinforcement module 22 can be easily disassembled and assembled. In an embodiment, when the reinforcement module 22 is mounted in the first receiving cavity, the first pin is inserted into the first receptacle such that the reinforcement module 22 is electrically connected to the first circuit board assembly 24, and is easily removed. Specifically, the number and arrangement manner of the first jacks are specifically set mainly according to the number and arrangement manner of the first power strip, and specific details are not described herein.

As an alternative to the above embodiment, the first receiving cavity has a first cavity opening; as shown in fig. 1, the circuit breaker further includes a transparent cover 115, and the transparent cover 115 is detachably connected to the middle cover 113 and covers the first cavity opening; the side of the reinforcing module 22 facing the transparent cover 115 is provided with a first status indicator lamp 22a. In an embodiment, the transparent cover 115 may be fastened to the middle cover 113, and cover the first cavity, so as to improve safety. The first status indicator light 22a on the enhancement module 22 is disposed facing the transparent cover 115 to facilitate viewing of the operational status of the enhancement module 22.

As an alternative implementation of the foregoing embodiment, as shown in fig. 1, the opposite sides of the reinforcing module 22 are formed with plug-in structures 22b. Generally, the plugging structure 22b is a plugging notch disposed on the reinforcing module 22. The insertion notch is arranged on two opposite sides of the reinforcing module 22, so that operators can conveniently insert and pull the whole reinforcing module 22, and the safety and the labor saving are realized.

As an alternative to the above embodiment, as shown in fig. 1, the reinforcing module 22 is formed with a guide groove 22c; the first accommodating chamber has a guide rib formed on a wall thereof, and the guide rib is slidably engaged with the guide groove 22 c. The guiding groove 22c plays a guiding role when the reinforcing module 22 is inserted and pulled out, and is in sliding fit with the guiding convex strip on the cavity wall of the first accommodating cavity, so that the reinforcing module 22 is convenient to install.

As an alternative to the above embodiment, as shown in fig. 1, the reinforcement module 22 further has a plug receiving groove 22d and a plug located in the plug receiving groove 22 d. The transparent cover 115 is formed with a first opening to expose the plug receiving groove 22d and the plug. The plug is mainly used for information interaction between external equipment and the enhancement module 22.

As an alternative to the above examples, the operating structure 12 comprises output terminals for outputting the operating parameters of the operating structure 12; the first circuit board assembly 24 includes a first circuit board 243 and a housing; the first circuit board 243 is mounted within the housing; the cover is mounted on the base 112 and/or the middle cover 113; the housing is provided with a collection notch, and the output terminal is electrically connected with the first circuit board 243 through the collection notch. In an embodiment, the output terminals generally include connection terminals of the transformer assembly 1210. As shown in fig. 3, an electrical parameter collecting notch 242a corresponding to the connection terminal is formed on the housing, so that the connection terminal is electrically connected with the first circuit board 243 through the electrical parameter collecting notch 242 a. In an embodiment, the operating structure 12 further comprises a temperature measuring device 1212 and a power take-off wire 1211, the temperature measuring device 1212 and the power take-off wire 1211 also being provided with temperature measuring terminals and connection terminals of the power take-off wire 1211, respectively. The connection structure of the temperature measurement terminal and the connection terminal of the power taking wire 1211 with the first circuit board 243 is exemplified in the following embodiments.

In an embodiment, the base 112 and the middle cover 113 are configured with a space for accommodating the first circuit board assembly 24. The first circuit board assembly 24 is installed between the base 112 and the middle cover 113, and is fixed to the base 112 and/or the middle cover 113. Generally, the housing is generally fixed with the base 112 and/or the middle cover 113 by screws, snap-fit or plug-in fixation. In an embodiment, as shown in fig. 1, the housing includes an upper housing 241 and a lower housing 242; the upper shroud 241 secures and the lower shroud 242 together define a cavity for mounting the first circuit board 243. The upper housing 241 is fixed to the middle cover, and the lower housing 242 is fixed to the base.

As an alternative implementation of the foregoing embodiment, as shown in fig. 1, the first circuit board assembly 24 further includes a side plug terminal seat 2431, and the side plug terminal seat 2431 is disposed on the first circuit board 243; the side plug terminal 2431 is used to communicate with an external device such as a handheld device or an extension module to enable monitoring of the circuit breaker function and also to enable a functional replacement in the event of a failure or loss of the protection module 21. In an embodiment, the housing is provided with a second opening; a third opening is formed on the base 112, or a third opening is formed on the middle cover 113, or the base 112 and the middle cover 113 together define a third opening; the second opening and the third opening are correspondingly arranged for exposing the side plug terminal seat 2431. In general, the side plug terminal 2431 is embedded in the second opening and the third opening, so as to facilitate the electrical connection between the external device and the side plug terminal.

As an alternative implementation of the foregoing embodiment, the first circuit board assembly 24 further includes a dust plug 244, and the dust plug 244 is sleeved on the side plug terminal seat 2431. Typically, the housing is provided with a boss 242c disposed adjacent the second opening. One end of the dust plug 244 is sleeved on the boss 242c and on the side plug terminal, so that electrostatic protection and dust prevention are enhanced when the side plug terminal seat 2431 is not required. In an embodiment, the third opening generally completely exposes the dust plug 244.

As an alternative implementation of the foregoing embodiment, the operating structure 12 further includes a temperature measurement device 1212, where the temperature measurement device 1212 includes a temperature measurement circuit board 1212b and a temperature measurement element 1212a. The output terminal comprises a temperature measuring terminal, and the temperature measuring terminal is connected with the temperature measuring piece 1212a through a wire. The temperature measuring circuit board 1212b is a light plate structure; the temperature measuring terminal is connected with the temperature measuring element 1212a through a wire, the wire passes through a round hole on the temperature measuring circuit board 1212b, and the wire passes through the round hole again after repeatedly winding for one turn, so that the temperature measuring element 1212a is fixed on the temperature measuring circuit board 1212 b. In some embodiments, the temperature measuring element 1212a may be soldered to the temperature measuring circuit board 1212b, and then a wire is led out from the edge of the temperature measuring circuit board 1212b, and the temperature measuring terminal is connected to the temperature measuring circuit board 1212b through the wire. As shown in fig. 3, the housing is provided with a temperature collection notch 242b, and the temperature measuring terminal is electrically connected with the first circuit board 243 through the temperature collection notch 242 b. In an embodiment, the base 112 is provided with a slot 112d, which is opposite to the temperature acquisition notch, so that a temperature measurement terminal of the temperature measurement device 1212 is electrically connected with the first circuit board 243, and temperature parameter acquisition is achieved.

As an alternative implementation of the above embodiment, as shown in fig. 4, a temperature measuring hole 112a is disposed on a side of the base 112 facing away from the middle cover 113; the temperature measuring piece 1212a extends into the temperature measuring hole 112a and is abutted against the wiring board 129 of the operating structure 12; the temperature measuring circuit board 1212b is fixed on the base 112, and presses the temperature measuring element 1212a. A temperature measuring hole 112a for accommodating the temperature measuring device 1212 is formed on the side of the base 112 facing away from the middle cover 113, such that the temperature measuring element 1212a of the temperature measuring device 1212 extends into the temperature measuring hole 112a and abuts against the wiring board 129 to collect the temperature of the wiring board 129; in general, the temperature measuring circuit board 1212b of the temperature measuring device 1212 is fixed on the base 112 by a screw, and presses the temperature measuring element 1212a.

As an alternative implementation of the above embodiment, as shown in fig. 4, the circuit breaker further includes a bottom plate 111, the bottom plate 111 is connected to a side of the base 112 facing away from the middle cover 113, and the temperature measuring device 1212 is disposed between the bottom plate 111 and the base 112. In an embodiment, the base plate 111 is generally clamped to the base 112 for protecting the temperature measuring device 1212. In some embodiments, the back of the base 112 is also provided with a power take-off hole 112b, and a screw is inserted through the power take-off wire 1211 and the power take-off hole 112b is locked to the wiring board 129 on the other side. The back of the base 112 is also provided with a wiring groove 112c and a slot 112d, and the wires of the temperature measuring device 1212 and the wire 1211 enter the slot 112d through the wiring groove 112 c. The bottom plate 111 is clamped on the base 112 to shield the wiring. In an embodiment, the power taking terminal and the temperature measuring terminal may be placed in the slot 112d at the same time, so that the temperature measuring terminal of the temperature measuring device 1212 and the power taking terminal on the power taking wire 1211 are electrically connected with the first circuit board 243, so as to realize the collection of the temperature parameter and the electrical parameter.

As an alternative implementation of the above embodiment, as shown in fig. 1 and 6, the operating structure 12 includes a reclosing mechanism 121, a release 124, an indicating mechanism 123, and an operating mechanism 127; the reclosing mechanism 121, the release 124, and the indicating mechanism 123 are disposed in the accommodating space defined by the middle cover 113 and the upper cover 114; the operating mechanism 127 is disposed in the accommodating space defined by the middle cover 113 and the base 112; the reclosing mechanism 121 is matched with a handle of the operating mechanism 127; the indicating mechanism 123 is in power connection with the reclosing mechanism 121, and is used for indicating the opening and closing state of the reclosing mechanism 121; the release 124 is disposed on the reclosing mechanism 121 and is configured to mate with a drawbar of the operating mechanism 127. As shown in fig. 1, the upper cover 114 is provided with an indication notch 114b for observing the indication mechanism 123; the protection module 21 is provided with a first button 213d corresponding to the traction lever, a first operation notch corresponding to the reclosing mechanism 121, and an observation window 213f corresponding to the indication notch 114 b. In an embodiment, the first button 213d may trigger the traction lever to rotate, and the operating mechanism 127 is linked to implement tripping. The first operation notch can be exposed to enable the inner hexagon fastening screw to be exposed to enable the portable push rod 213b to be moved when the reclosing state of the product needs to be manually switched under special conditions, and the inner hexagon spanner is utilized to finish operation. The state of the indicator is conveniently and intuitively identified through the observation window 213f, so that the opening and closing state of the product is known.

In an embodiment, as shown in fig. 5 and 6, the protection module 21 further includes a thin plate and a portable push rod 213b connected to the thin plate. The first operation notch is covered by the thin plate under the condition of not being used, the thin plate can be exposed out of the first operation notch by moving the portable push rod, and then the inner hexagonal fastening screw can be operated by using the inner hexagonal wrench to realize manual opening and closing.

As an alternative to the above embodiment, as shown in fig. 1, a second accommodating cavity is formed on a side of the upper cover 114 facing away from the base 112, and is in communication with the indication notch 114 b. The second accommodating cavity is provided with a second cavity opening; the second circuit board assembly 23 is installed in the second accommodating cavity; the protection module 21 covers the second cavity opening. In the embodiment, the second circuit board assembly 23 is installed inside the second accommodating cavity, and the protection module 21 covers the cavity opening of the second accommodating cavity, so that the second circuit board assembly 23 is installed in the upper cover 114, and safety and structural compactness are improved.

As an alternative to the above embodiment, as shown in fig. 1, the second circuit board assembly 23 further includes: a second circuit board 231, a second power strip and a cover plate 232. The second circuit board 231 is disposed in the second accommodating cavity. The second power strip is mounted on the second circuit board 231. The cover 232 is disposed on the second circuit board 231. The cover 232 is formed with a second jack, and the second jack is disposed corresponding to the second power strip, so as to expose the second power strip. In an embodiment, a mounting structure, such as a threaded hole, a limiting step, etc., for mounting the second circuit board 231 is provided in the second accommodating chamber. The second wiring board 231 is fixed in the second accommodation chamber. The cover plate 232 is disposed on the second circuit board 231 to protect the second circuit board 231. In an embodiment, the protection module 21 includes a second pin, and the second pin is inserted into the second socket. Since the second strip is exposed by the second insertion hole on the cover plate 232, the second pins are inserted into the second strip when the protection module 21 is mounted into the second accommodating cavity; when the protection module 21 is detached, the second pins are separated from the second power strip, so that the removal and installation of the protection module 21 in the embodiment of the application are quick and convenient.

In the embodiment, the cover 232 is provided with an operation hole 232c corresponding to the first operation notch, and the operation hole 232c is used for exposing the hexagon socket screw of the reclosing mechanism 121, so as to facilitate operation. In an embodiment, the first operation notch, the operation hole 232c, and the second operation notch 114a are disposed correspondingly to expose the hexagon socket screw of the reclosing mechanism 121.

As an alternative implementation of the above embodiment, as shown in fig. 5 and 6, the protection module 21 includes: a first housing 211 and a second housing 214, wherein the first housing 211 and the second housing 214 are fixedly connected to define a third accommodating cavity. The observation window 213f is disposed on the man-machine interaction component 213. The cover 232 is provided with an indication hole 232a, and the indication hole 232a is disposed corresponding to the observation window 213f and the indication notch 114 b. In the embodiment, the indication hole 232a, the indication notch 114b and the observation window 213f are correspondingly arranged, so that an operator can observe the indication position of the indication mechanism 123 to know the working state of the circuit breaker. The protection module 21 further comprises a controller 212, wherein the controller 212 is installed in the third accommodating cavity; the controller 212 includes the second pin, and thus the controller 212 may obtain information sent by the second circuit board assembly 23. In an embodiment, the man-machine interaction assembly 213 is further provided with a display screen window 213a, which is used for installing a display screen, and the display screen is electrically connected with the controller 212 to display information such as working parameters and working states of the circuit breaker. The protection module 21 further includes a man-machine interaction component 213, where the man-machine interaction component 213 is disposed in the third accommodating cavity; the man-machine interaction component 213 comprises a second button 213e for inputting a control signal to the controller 212. In an embodiment, the second buttons 213e are generally provided in a plurality, and the plurality of second buttons 213e correspond to different functions, respectively, and the controller 212 is configured to perform the corresponding functions in response to the control signals by triggering the second buttons 213e to input the control signals to the controller 212. For example, the second button 213e includes a display button, and the controller 212 can be triggered to control the display screen to display the operating parameters and the operating state of the circuit breaker by triggering the display button.

In an embodiment, the relative positions of the human-machine interaction component 213 and the controller 212 are specifically set according to the specific situation. The first housing 211 is provided with a distributed boss for supporting the controller 212, and a duct for enabling the second pin of the controller 212 to be electrically connected with the second circuit board 231, and protecting and positioning the controller 212. The man-machine interaction components 213 are distributed at corresponding positions of the controller 212, are matched with the second housing 214 to complete fixation, and finally are fastened and fixed through threaded fasteners. In the embodiment, the second housing 214 is provided with an observation notch corresponding to the observation window 213f, a fourth opening exposing the second button 213e, a fifth opening exposing the first button 213d, and a sixth opening exposing the display screen. In an embodiment, the human-computer interaction component 213 is further provided with a second status indicator lamp 213c electrically connected to the controller. The second housing 214 is provided with a seventh opening exposing the second status indicator lamp 213c.

As an alternative to the above embodiment, as shown in fig. 1, in the embodiment, the first circuit board assembly 24 and the second circuit board assembly 23 are electrically connected by a connection wire 2432. Specifically, the first circuit board assembly 24 further includes a connecting wire 2432, and the upper cover 114 is provided with a wire hole communicating with the second accommodating chamber; the connecting wire 2432 extends into the second receiving cavity through the wire hole to be electrically connected with the second circuit board assembly 23.

As an alternative implementation manner of the foregoing embodiment, as shown in fig. 1, the middle cover 113 is provided with a third button corresponding to the first button 213d, where the third button is disposed corresponding to the traction rod, and is configured to trigger the traction rod to trip the circuit breaker when the traction rod is pressed by the first button 213 d. The third button is provided on the middle cover 113, and may not be affected by the insertion or replacement of the protection module 21. That is, in an embodiment, the first button 213d and the third button may be provided as T-shaped buttons. In an embodiment, the cover plate 232 of the second circuit board assembly 23 is provided with a square finger button hole 232b, and the button hole 232b is used for facilitating the first button 213d inside the protection module 21 to act on the third button on the middle cover 113.

As an alternative to the above embodiment, as shown in fig. 8, the operating mechanism 127 further includes a driving mechanism 122, and the driving mechanism 122 includes a driving member, a ratchet 122e, and a spindle sleeve 122f; the driving member is configured to drive the ratchet 122e to rotate; the spindle sleeve 122f has a telescopic limiting shaft, and the telescopic limiting shaft abuts against the inner peripheral surface of the ratchet wheel 122 e; the spindle sleeve 122f is matched with the reclosing mechanism 121 to drive the reclosing mechanism 121 to realize opening and closing. Further, the driving mechanism 122 includes a ratchet 122e, a spindle sleeve 122f, and a telescopic limiting shaft disposed on the spindle sleeve 122 f. The spindle cover 122f is in power connection with the slide plate 121e for driving the slide plate 121e between a first position and a second position. The spindle sleeve 122f is fixedly connected with a manual mechanism. The ratchet wheel 122e is in power connection with the driving piece; wherein the ratchet wheel 122e is configured with a shaft hole, and the spindle sleeve 122f is at least partially embedded in the shaft hole and can rotate along the axis of the spindle sleeve in the shaft hole; the inner peripheral surface includes a hole wall of the shaft hole having a thrust surface formed to extend in a radial direction of the ratchet 122 e; when the telescopic limiting shaft contacts the thrust surface, the driving member drives the ratchet 122e to rotate along a preset direction so as to drive the swivel base 121c to rotate, thereby linking the slide plate 121e; when the rotating seat 121c is driven to rotate along the preset direction by the inner hexagonal fastening screw 121d, the sliding plate 121e is linked, and the telescopic limiting shaft is far away from the thrust surface. In the embodiment of the application, a clutch mechanism is not required to be arranged, so that the purpose that the sliding plate 121e is driven to move between the first position and the second position by the manual operation and the driving piece respectively can be realized, and the complexity of the reclosing mechanism 121 can be reduced; in this application, both manual operation and electric operation can directly drive the rotary seat 121c to drive the sliding plate 121e to move, so that the transmission efficiency is higher and the energy consumption is lower.

In an embodiment, the inner peripheral surface of the shaft hole has at least two circumferential curved surfaces and at least two thrust surfaces; at least two circumferential curved surfaces are arranged in a staggered manner in the circumferential direction of the driving piece, at least two thrust surfaces are arranged at intervals along the circumferential direction of the driving piece, and two adjacent circumferential curved surfaces are in transition through one thrust surface; the telescopic limiting shaft is abutted against the circumferential curved surface.

As an alternative to the above embodiment, the enhancement module 22 is electrically connected to the protection module 21. The enhancement module 22 and the protection module 21 CAN be electrically connected through the CAN bus to perform information interaction, realize mutual detection and improve the reliability of the circuit breaker.

The foregoing has described in detail a circuit breaker provided by the embodiments of the present application, and specific examples have been set forth herein to illustrate the principles and embodiments of the present invention, the above examples being provided only to assist in understanding the method of the present invention and its core ideas; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.

Claims

1. A circuit breaker, comprising:

the operation structure is arranged in the accommodating space;

2. The circuit breaker of claim 1, wherein the middle cover is provided with a first receptacle; the first circuit board assembly comprises a first power strip which is embedded into the first jack;

3. The circuit breaker of claim 2, wherein the first receiving chamber has a first chamber opening; the circuit breaker further comprises a transparent cover, wherein the transparent cover is detachably connected to the middle cover and covers the first cavity opening;

4. A circuit breaker according to claim 2 or claim 3 wherein the reinforcing module is formed with a plug-and-socket arrangement on opposite sides thereof.

5. The circuit breaker of claim 2 or 3, wherein the reinforcing module has a guide slot formed thereon; the first accommodating cavity is provided with a cavity wall provided with a guide convex strip which is in sliding fit with the guide groove.

6. The circuit breaker of claim 2 or 3, wherein the enhancement module further has a plug receiving slot and a plug positioned within the plug receiving slot; the transparent cover is provided with a first opening, and the plug accommodating groove and the plug are exposed from the first opening.

7. A circuit breaker according to any one of claims 1 to 3 wherein the operating structure includes an output terminal for outputting an operating parameter of the operating structure;

8. The circuit breaker of claim 7, wherein the first circuit board assembly further comprises a side plug terminal mount disposed on the first circuit board;

9. The circuit breaker of claim 8, wherein the first circuit board assembly further comprises a dust plug that is nested on the side plug terminal block.

10. The circuit breaker of claim 7, wherein the operating structure further comprises a temperature measuring device comprising a temperature measuring circuit board and a temperature measuring member; the output terminal comprises a temperature measurement terminal; the housing is provided with a temperature acquisition notch, and the temperature measuring terminal is electrically connected with the first circuit board through the temperature acquisition notch;

the temperature measuring terminal is connected with the temperature measuring circuit board through a wire; the temperature measuring part is welded on the temperature measuring circuit board, or the lead wire passes through a round hole on the temperature measuring circuit board, so that the temperature measuring part is fixed on the temperature measuring circuit board.

11. The circuit breaker of claim 10, wherein a side of the base facing away from the middle cover is provided with a temperature measurement hole; the temperature measuring piece stretches into the temperature measuring hole and is abutted with the wiring board of the operation structure; the temperature measuring circuit board is fixed on the base and compresses the temperature measuring piece.

12. The circuit breaker of claim 11, further comprising a base plate connected to a side of the base plate facing away from the middle cover, wherein the temperature measuring device is disposed between the base plate and the base plate.

13. The circuit breaker of claim 1, wherein the operating structure comprises a reclosing mechanism, a release, an indicating mechanism, and an operating mechanism;

14. The circuit breaker of claim 13, wherein a side of the upper cover facing away from the base is formed with a second receiving cavity in communication with the indication notch; the second accommodating cavity is provided with a second cavity opening;

15. The circuit breaker of claim 14, wherein the second circuit board assembly further comprises:

the second circuit board is arranged in the second accommodating cavity;

the second power strip is arranged on the second circuit board;

16. The circuit breaker of claim 15, wherein the protection module comprises:

17. The circuit breaker of claim 14, wherein the first circuit board assembly further comprises a connecting wire, the upper cover being provided with a wire hole in communication with the second receiving chamber; the connecting wire extends into the second accommodating cavity through the wire hole and is electrically connected with the second circuit board assembly.

18. The circuit breaker of claim 13, wherein a third button is provided on the middle cover and corresponds to the first button, the third button corresponding to the traction rod and configured to trigger the traction rod to drive the circuit breaker to trip when the traction rod is pressed by the first button.

19. The circuit breaker of claim 13, wherein the operating mechanism further comprises a drive mechanism comprising a drive member, a ratchet, and a spindle cover; the driving piece is configured to drive the ratchet wheel to rotate; the main shaft sleeve is provided with a telescopic limiting shaft, and the telescopic limiting shaft is abutted against the inner peripheral surface of the ratchet wheel; the main shaft sleeve is matched with the reclosing mechanism to drive the reclosing mechanism to realize opening and closing.

20. The circuit breaker of claim 1, wherein the enhancement module is electrically connected with the protection module.