CN116504595A

CN116504595A - Circuit breaker

Info

Publication number: CN116504595A
Application number: CN202210074766.9A
Authority: CN
Inventors: 夏晓敏; 陈晓海; 郑发锦; 唐璠
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2023-07-28
Also published as: WO2023138042A1; AU2022434579A1; EP4318537A1

Abstract

The circuit breaker comprises a shell and at least two L poles, wherein a drain electrode is arranged between the two L poles, an electromagnetic coil of an electromagnetic system is arranged on one side of a third operating mechanism of the drain electrode, a connecting rod is rotationally assembled on one side of the electromagnetic coil, the connecting rod links the third operating mechanism and the operating mechanisms of two adjacent L poles, when the circuit breaker is closed, the connecting rod rotates to a closing position along with the drain electrode and the operating mechanisms of the two adjacent L poles, and when the circuit breaker is opened, the connecting rod rotates to an opening direction along with the operating mechanisms of the two L poles adjacent to the drain electrode, but the third operating mechanism does not act; when the leakage fault occurs, the third operating mechanism drives the operating mechanisms of the two adjacent L poles to jointly rotate towards the opening direction through the connecting rod. According to the invention, the drain protection electrode and the adjacent two L electrodes are connected together in a linkage way by the connecting rod, so that the matching degree between the circuit breaker electrodes of the circuit breaker is improved.

Description

Circuit breaker

Technical Field

The invention relates to the field of piezoelectric devices, in particular to a circuit breaker.

Background

In the field of low-voltage power transmission and distribution, a circuit breaker is a main circuit control device, and for a multipolar circuit breaker, particularly an assembled circuit breaker, linkage among all operating mechanisms is most commonly realized through an assembled shaft, however, in an integrated circuit breaker, due to the influence of factors such as structural layout and the like, two non-adjacent circuit breakers are extremely difficult to realize linkage through the assembled shaft, so that the applicability of the assembled shaft is lower, particularly in the circuit breaker with a leakage protection electrode arranged between the two operating mechanisms, the assembled shaft has defects in the aspects of considering the leakage protection function and linkage cooperation, and the reliability of the circuit breaker is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a circuit breaker with simple structure and high reliability.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a circuit breaker comprises a shell, wherein a plurality of circuit breaker poles are arranged in parallel in the shell, each circuit breaker pole at least comprises two L poles, a leakage protection electrode is arranged between the two L poles, an electromagnetic coil of an electromagnetic system is arranged on one side of a third operating mechanism of the leakage protection electrode, a connecting rod is rotatably assembled on one side of the electromagnetic coil, the connecting rod links the third operating mechanism and the operating mechanisms of the two adjacent L poles,

when the breaker is switched on, the connecting rod rotates to a switching-on position along with the drain electrode and the operating mechanisms of the two adjacent L electrodes,

when the breaker is opened, the connecting rod rotates along with the operating mechanisms of the two L poles adjacent to the leakage protection electrode in the opening direction, but the third operating mechanism does not act;

when the leakage fault occurs, the third operating mechanism drives the operating mechanisms of the two adjacent L poles to jointly rotate towards the opening direction through the connecting rod.

Further, the connecting rod comprises a first linkage part, a second linkage part and a third linkage part, wherein the first linkage part and the second linkage part are respectively connected with the operation mechanisms of the two adjacent L poles in a linkage way, and a driving arm of the third operation mechanism is positioned between the third linkage part and the electromagnetic coil.

Further, the third operating mechanism comprises a third lever, the third lever and the connecting rod are coaxially assembled in a rotating mode, and one end of the third lever is provided with a driving arm matched with the third linkage part.

Further, the leakage protection electrode is further rotationally provided with a leakage handle mechanism, the leakage handle mechanism is linked with the third operating mechanism, when no leakage fault occurs, the leakage handle mechanism is located at a closing position, and when the leakage fault occurs, the leakage handle mechanism swings to a separating position.

Further, the operating mechanisms of the two L electrodes adjacent to the drain electrode are a first operating mechanism and a second operating mechanism respectively, the first operating mechanism comprises a first lock catch provided with a first connecting portion, the first lock catch is connected with a first linkage portion of the connecting rod through the first connecting portion, the second operating mechanism comprises a second lock catch provided with a second connecting portion, and the second lock catch is connected with a second linkage portion of the connecting rod through the second connecting portion.

Further, the first connecting portion is of a boss structure, and the second connecting portion is of a groove structure.

Further, the connecting rod includes rotation portion and U-shaped board, rotation portion is equipped with and rotates the spread groove, radially along rotating the spread groove bulge respectively and form first body of rod and second body of rod, the end of first body of rod is buckled along the direction that is on a parallel with the central axis of rotation spread groove and is formed the rod-shaped third linkage portion, the end at third linkage portion is connected as first linkage portion to the U-shaped board the one side protrusion of second body of rod back to third linkage portion is equipped with protruding axle, protruding axle is parallel with the central axis of rotation spread groove as second linkage portion.

Further, the rotating part is of a fan-shaped structure, and the fan-shaped structure is provided with a hollowed-out area.

Further, two breaker poles are arranged on two sides of the drain electrode in parallel, the two breaker poles on one side of the drain electrode are L poles, and the two breaker poles on the other side of the drain electrode are L poles and N poles respectively.

Further, two L poles located on the same side of the drain electrode comprise first operating mechanisms, two adjacent first operating mechanisms are connected in linkage through an assembling shaft, the L poles located on the other side of the drain electrode comprise second operating mechanisms, and the N poles comprise N pole contact mechanisms driven by the second operating mechanisms.

According to the circuit breaker, the connecting rod is additionally arranged in the drain electrode, the third operating mechanism of the drain electrode is connected with the operating mechanisms of the two adjacent L electrodes in a linkage way, when no leakage fault occurs, the normal opening and closing action of the circuit breaker can not enable the connecting rod to drive the drain electrode to act, and when any one L electrode operating mechanism performs the protection action, the other L electrode operating mechanism can be driven to act in a linkage way through the connecting rod; when the leakage fault occurs, the third operating mechanism drives the adjacent two operating mechanisms to break through the connecting rod, so that the matching degree between the circuit breaker poles of the circuit breaker is improved.

In addition, the leakage handle mechanism of the leakage protection electrode swings along with the third operating mechanism to indicate whether leakage faults occur or not, so that observation is facilitated.

Drawings

Fig. 1 is a schematic structural view of a circuit breaker according to the present invention;

fig. 2 is a schematic structural view of a circuit breaker (including an indication window) according to the present invention;

fig. 3 is a cross-sectional view of a circuit breaker of the present invention;

FIG. 4 is a schematic view of the structure of the L pole in the present invention;

FIG. 5 is a schematic view of the structure of the drain electrode according to the present invention;

FIG. 6 is a schematic view of a drain electrode structure (including a circuit board) according to the present invention;

FIG. 7 is a schematic view of the bottom structure of the drain electrode of the present invention;

fig. 8 is a schematic structural view of a separator on one side of the drain electrode in the present invention;

FIG. 9 is a schematic view of another separator of the leakage protection electrode of the present invention;

FIG. 10 is a schematic view of the structure of the N pole in the present invention;

FIGS. 11-12 are schematic illustrations of the structure of an electromagnetic system in accordance with the present invention;

FIG. 13 is a schematic view of the coil assembly of the present invention;

FIG. 14 is a cross-sectional view of a coil assembly of the present invention;

FIG. 15 is a schematic width view of a coil assembly of the present invention;

FIG. 16 is a schematic view of a first operating mechanism in accordance with the present invention;

FIG. 17 is a schematic view of a second actuator mechanism according to the present invention;

FIG. 18 is a schematic view of a connecting rod in accordance with the present invention;

fig. 19 is a schematic structural view of an N-pole arc striking plate in the present invention.

Detailed Description

A specific embodiment of a circuit breaker according to the present invention is further described below with reference to the examples shown in fig. 1 to 19. A circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, a circuit breaker comprises a housing, a plurality of partition plates 13 are arranged in parallel in the housing, a space in the housing is divided into a plurality of installation cavities by the plurality of partition plates 13, the partition plates 13 comprise partition plates and side walls arranged along edges of the partition plates, wherein the side walls are arranged along a direction perpendicular to the partition plates, the partition plates are positioned between two adjacent circuit breaker electrodes to play a role of separating, one circuit breaker electrode is assembled in each installation cavity to form a multi-electrode circuit breaker, the plurality of circuit breaker electrodes comprise at least one N electrode 4 and at least two L electrodes 2, at least one installation cavity positioned between the two circuit breaker electrodes is used for arranging a drain electrode 3, the drain electrode 3 is separated from the adjacent circuit breaker electrodes by the partition plates 13, operating mechanisms which are connected in a linkage mode are respectively arranged between the drain electrode 3 and the L electrodes 2, the drain electrode 3 and the N electrode 4 are preferably positioned on two sides of the same L electrode 2, and the drain electrode 3 and the N electrode 4 can be positioned on two sides of the same L electrode 2 or between the two L electrodes 4.

The L pole 2 comprises an L pole wiring terminal 24, a handle mechanism, an operating mechanism, an L pole contact mechanism and an arc extinguishing system, wherein the L pole contact mechanism comprises an L pole moving contact 231 and an L pole fixed contact 232, the handle mechanism, the operating mechanism and the L pole moving contact 231 are sequentially connected in a linkage way, so that the L pole moving contact 231 is close to or far from the L pole fixed contact 232 to realize switching-on and switching-off actions, an L pole 2 line is switched on or off, the arc extinguishing system is arranged on one side of the L pole contact mechanism and is used for extinguishing an arc generated by breaking, and further, a protection mechanism can be arranged in the L pole 2, the protection mechanism comprises a short circuit protection mechanism and/or an overload protection mechanism, and when a short circuit or overload fault occurs, the protection mechanism completes the protection action; the N pole 4 comprises an N pole wiring terminal 43 and an N pole contact mechanism connected with the N pole wiring terminal 43, and the N pole contact mechanism comprises an N pole moving contact and an N pole fixed contact which are matched with each other; the leakage protection mechanism comprises a third operating mechanism 31 and an electromagnetic coil 52 of the electromagnetic system 5, wherein the third operating mechanism 31 is driven to act and drive the L electrode 2 and the N electrode 4 to break off when the leakage fault occurs, so that the leakage protection is realized.

As shown in fig. 5, 8 and 9, one connecting rod 34 is rotatably assembled in the drain electrode 3, the connecting rod 34 is positioned at one side of the electromagnetic coil 52, the third operating mechanism 31 of the drain electrode 3 and the operating mechanisms of the two adjacent L-poles 2 of the drain electrode 3 are connected in linkage by the connecting rod 34, when the circuit breaker is closed, the connecting rod 34 rotates to a closing position along with the operating mechanisms of the drain electrode 3 and the two adjacent L-poles 2, and when the circuit breaker is opened, the operating mechanisms of the two adjacent L-poles 2 of the drain electrode 3 rotate to an opening direction under the linkage of the connecting rod 34, and the third operating mechanism 31 does not act; when an electric leakage fault occurs, the operating mechanism of the electric leakage circuit breaker drives the operating mechanisms of the two adjacent L poles 2 to jointly rotate towards the opening direction through the connecting rod 34.

Specifically, as shown in fig. 18, the link 34 includes a first linkage part 341, a second linkage part 342, and a third linkage part 343, the first linkage part 341 and the second linkage part 342 are respectively connected with the operation mechanisms of the adjacent two L poles 2 in a linkage manner, the driving part of the third operation mechanism 31 is located between the electromagnetic coil 52 and the third linkage part 343, the opening and closing operation of the third operation mechanism 31 is operated by the electric leakage handle mechanism 32, when electric leakage occurs, the driving arm 312 is triggered to rotate the third operation mechanism 31 in the opening direction, the operation mechanism of the adjacent L pole 2 is driven to rotate in the opening direction by the link 34, and after the electric leakage fault is released, the circuit breaker is closed, and the link 34 drives the first operation mechanism 21, the second operation mechanism 22, and the third operation mechanism 31 to close.

Further, an indication device is further provided on the L-pole 2 and the drain protection electrode 3, as shown in fig. 2, an indication window 17 is provided on the L-pole 2, the indication window 17 indicates the position of the operating mechanism of the L-pole 2, and the opening and closing condition of the L-pole 2 is determined according to the position of the operating mechanism of the L-pole 2; the leakage protection electrode 3 is provided with a leakage handle mechanism 32, preferably, the leakage handle mechanism 32 is a leakage indication handle, has a leakage indication function, can be used for indicating that a leakage fault occurs, the leakage handle mechanism 32 is connected with the third operating mechanism 31 in a linkage manner, when the leakage fault occurs, the leakage handle mechanism 32 swings to a brake separating position to indicate that the leakage fault exists, and when the leakage fault does not occur, no matter whether the circuit breaker is in a brake-on state or a brake-off state, the leakage handle mechanism 32 is located at the brake-on position, so that whether the leakage fault exists can be judged according to the position of the leakage handle mechanism 32.

As shown in fig. 1, 5, 6 and 9, the drain electrode 3 further includes a circuit board 36 and an electromagnetic relay 35, and another improvement of the present application is that an installation space is reserved at the bottom of an installation cavity of the drain electrode 3, a notch 18 is formed in the bottom wall of the installation cavity corresponding to the installation space, and is used for taking out or loading the circuit board 36 and the electromagnetic relay 35, the notch 18 is closed by a cover plate 14 (see fig. 1), the circuit board 36 and the electromagnetic relay 35 are respectively fixed on one side in the pair of cover plates 14 and correspondingly placed in the installation space, and preferably, a clamping structure is arranged at the edge of the installation space, and the clamping structure is used for limiting the circuit board 36 and the electromagnetic relay 35 in the installation groove. The circuit board 36 and the electromagnetic relay 35 can be taken out from the bottom for maintenance or replacement, so that the disassembly and assembly steps are simplified, and the circuit breaker is particularly suitable for a circuit breaker with compact internal space and complex structure.

The leakage protection electrode 3 is further provided with a test button loop device 33, preferably a test button loop is arranged on the upper portion of the leakage protection electrode 3, the test button loop device 33 is used for testing whether the leakage protection electrode 3 works normally, the test button loop device 33 comprises a test loop and a test button, the test loop is powered from a main circuit of the circuit breaker, the test button is in sliding fit with the shell, the test button is pressed under the closing state to be connected with the test loop, and accordingly functions of the leakage protection electrode 3 are detected.

Another improvement of the present application is that the N pole 4 omits the operating mechanism within the N pole 4, and the N pole contact mechanism is driven by the operating mechanism of one L pole 2 adjacent to the N pole 4, so that the internal widths of the two mounting cavities for assembling the N pole 4, the L pole 2 can be further compressed, thereby realizing a reduced overall width of the circuit breaker.

Further, as shown in fig. 10, an N-pole arc striking plate 42 with a small occupied space is disposed in the N-pole 4, and the arc striking effect on the N-pole 4 is improved by adding the N-pole arc striking plate 42, so that adverse effects of high-temperature arc on the circuit breaker are avoided. The N-pole arc striking plate 42 is disposed at one side of the N-pole static contact of the N-pole contact mechanism, the plane of the N-pole arc striking plate 42 is parallel to the partition 13 of the N-pole 4, and can be close to the partition 13, so as to reduce the gap between the N-pole arc striking plate 42 and the partition 13, and avoid increasing the width of the N-pole 4.

Referring to fig. 1-19, a circuit breaker is described in detail, the circuit breaker includes a housing, the housing includes a base 12 and an upper cover 11 that are mutually covered, four partitions 13 are disposed between the base 12 and the upper cover 11 in parallel, the four partitions 13 divide the interior space of the housing into five installation cavities, one circuit breaker electrode or one leakage protection electrode 3 is disposed in each installation cavity, in this embodiment, the inner width of the installation cavity located at the most middle is 18.8mm, and the leakage protection electrode 3 is disposed in the installation cavity, the inner widths of the two installation cavities located at one side of the leakage protection electrode 3 are 14.4mm, one L electrode 2 is disposed in the installation cavity with the inner width of 14.4mm, in this embodiment, the two L electrodes 2 are connected with an a phase line and a phase line, respectively, the total inner width of the two installation cavities located at the other side of the leakage protection electrode 3 is 16.6mm, in this embodiment, the other L electrode 2 is disposed in the installation cavity located at the most middle, the inner width of the installation cavity is 18.4 mm, and the wall thickness of the housing is further smaller than or equal to the whole width of the partition 11 is smaller than or equal to the required to the whole width of the housing 13, and the wall thickness of the whole is smaller than or equal to the whole width of the partition 13 is smaller than the whole width is required to be adjusted by the cover 13.

In this embodiment, two L poles 2 arranged on one side of the drain electrode 3 are identical in structure, as shown in fig. 4, the L poles 2 include L pole connection terminals 24 respectively arranged at two ends of the L pole 2, a handle mechanism, a first operating mechanism 21, an L pole contact mechanism and an arc extinguishing system are arranged between the L pole connection terminals 24, wherein the handle mechanism is connected with the first operating mechanism 21 in a linkage manner and is arranged at the upper part of the L pole 2, an L pole moving contact 231 of the L pole contact mechanism is connected at the lower part of the first operating mechanism 21, an L pole fixed contact 232 of the L pole contact mechanism is arranged at the middle part of the L pole 2 with the arc extinguishing system, a coil assembly 51 of the electromagnetic system 5 is arranged between the handle mechanism and the arc extinguishing system, one end of the coil assembly 51 is opposite to the first operating mechanism 21, when a short circuit fault occurs, the first operating mechanism 21 is driven by the coil assembly 51, and an overload protection mechanism is arranged between the L pole moving contact 231 and the L pole connection terminal 24, and the active end of the overload protection mechanism is opposite to the first operating mechanism 21.

As shown in fig. 16, the first operating mechanism 21 includes a first lever, a first trip button and a first lock catch 211, where the first lever is rotatably assembled in the installation cavity, the first lever is rotatably assembled with the first trip button and the first lock catch 211, the first trip button is connected with the handle mechanism in a linkage manner by a connecting rod 34, the first trip button is in snap fit with one end of the first lock catch 211, the other end of the first lock catch 211 is opposite to one end of the coil assembly 51, a trip hook for cooperating with the overload protection mechanism is further connected with the other end of the first lock catch 211, and when an overload fault occurs, the movable end of the overload protection mechanism drives the first lock catch 211 to rotate by the trip hook, thereby realizing overload protection. Further, the first operating mechanism 21 may further be provided with a first reset element, where the first reset element is connected to the first lock catch 211, and the first reset element is matched with the housing to provide a reset force for the first lock catch 211. In the present embodiment, the first operating mechanisms 21 of the two L-poles 2 arranged in parallel are linked by the split shaft 25 (see fig. 3), and the first operating mechanism 21 adjacent to the drain electrode 3 is provided with a boss structure as a first connecting portion 212, and the first connecting portion 212 extends into the drain electrode 3 through the separator 13 to be linked with the connecting rod 34.

In addition, an indication window 17 is opened at the upper part of the housing corresponding to the first operating mechanism 21, an indicator linked with the first operating mechanism 21 is provided in the indication window 17, the indicator correspondingly displays that the first operating mechanism 21 is in a switching-off state or a switching-on state, for example, the indicator can be a push plate slidingly assembled at the indication window 17, the push plate is pushed by the first operating mechanism 21, and a corresponding mark is provided on the push plate, for example, red indicates switching-on and green indicates switching-off.

In this embodiment, as shown in fig. 11-15, the electromagnetic system 5 is an integral structure, the electromagnetic system 5 includes a plurality of coil assemblies 51 arranged in parallel, one coil assembly 51 arranged in the L pole 2 is located between the handle mechanism and the arc extinguishing system, two ends of the coil assembly 51 are respectively connected with the L pole fixed contact 232 and one L pole connection terminal 24, preferably the width of the coil assembly 51 is 13.4mm (i.e. a in fig. 15 represents the width of the coil assembly 51 and can also be understood as the outer diameter of the coil assembly 51), the coil 513 is wound by adopting a reduced wire diameter, compared with the existing 14.2mm coil assembly 51, the space between the coil assembly 51 and the partition 13 is increased, meanwhile, a thickening part is formed in the partition 13 area corresponding to the coil assembly 51, the thickness of the partition 13 between two adjacent coil assemblies 51 is also increased, which is beneficial to reducing the side temperature rise of the circuit breaker, specifically, the wall thickness of the normal separator 13 is 1.0 mm-1.4 mm, the thickening portion is correspondingly thickened by 0.4mm, so that the wall thickness of the region of the separator 13 corresponding to the coil assembly 51 is 1.8mm, preferably the thickening portion forms a strip-shaped thickening portion at two ends of the coil assembly 51 and at one side edge facing the arc extinguishing system, the width of each strip-shaped thickening portion is less than or equal to 0.6mm (the width of each strip-shaped thickening portion is the width along the plane direction of the separator 13 and is different from the whole width direction of the circuit breaker, the thickening direction of the thickening portion is consistent with the width direction of the circuit breaker), in addition, the coil assembly 51 with smaller width makes the section of one end of the coil assembly 51 smaller, so that the contact surface with one side wall of the mounting cavity is also smaller, so that the spare part of the side wall of the mounting cavity between the handle mechanism and the coil assembly 51 is more, and the corresponding side wall of the mounting cavity can be thickened here, the smaller diameter coil assembly 51 does not affect its performance and may be achieved by employing a flat coil 53, re-matching the number of turns, width, etc. of the coil 513.

As shown in fig. 12-15, the coil assembly 51 includes a bracket 511, a coil frame 512, a coil 513, a movable iron core 514, a stationary iron core 515, a push rod 516 and a return spring 517, the coil frame 512 is assembled on the bracket 511, the coil 513 is wound on the outer side of the coil frame 512, the movable iron core 514 and the stationary iron core 515 are respectively disposed at two opposite ends of the coil frame 512, a through hole is disposed in the middle of the stationary iron core 515, the push rod 516 penetrates through the through hole of the stationary iron core 515, one end of the push rod 516 is connected with the movable iron core 514, the other end of the push rod 516 is opposite to the first lock catch 211 of the first operating mechanism 21, the return spring 517 is sleeved on the outer side of the push rod 516 and is located inside the coil frame 512, two ends of the return spring 517 are respectively abutted to the movable iron core 514 and the stationary iron core 515, and when a short circuit fault occurs, the coil 513 drives the movable iron core 514 to act to trigger the other end of the push rod 516 to rotate the first lock catch 211, so that the first operating mechanism 21 is tripped.

The L-pole stationary contact 232 connected to the coil assembly 51 includes an L-pole stationary contact plate, a contact and an L-pole arc striking plate 2322, preferably, the L-pole stationary contact plate is integrally formed with the bracket 511 of the coil assembly 51, one end of the L-pole stationary contact plate is bent and extends obliquely along a direction close to the coil assembly 51 to form an oblique section 2321, one terminal 5131 of the coil 513 extends obliquely and is connected with the oblique section 2321, so that the coil 513 has only one welding point with the L-pole stationary contact plate, and meanwhile, current directly flows into the coil 513 through the L-pole stationary contact plate, so that the distance of the current flowing through the coil assembly 51 is shortened, the temperature rise of the position of the coil assembly 51 is effectively reduced, and the side temperature rise of a product is reduced; a contact is provided on a side of the L-pole stationary contact plate facing away from the coil assembly 51, and the other end of the L-pole stationary contact plate is bent back in a direction approaching the bracket 511 to form an L-pole arc striking plate 2322.

In this embodiment, the L-poles 2 located on both sides of the drain-protection electrode 3 are similar, the L-poles 2 separately provided on one side of the drain-protection electrode 3 include the L-pole connection terminals 24, the handle mechanism, the L-pole contact mechanisms, the arc-extinguishing chambers, and the overload protection mechanisms that are identical to the other two L-poles 2, and the assembly positions are identical to the positions of the other two L-poles 2, the other coil assembly 51 of the electromagnetic system 5 is provided between the handle mechanism and the arc-extinguishing system, and the side wall of the installation cavity (i.e., the partition 13, specifically, the partition of the partition 13) between the handle mechanism and the arc-extinguishing system is thickened to reduce the side temperature rise, and the other end of the coil assembly 51 and the L-pole stationary contact 232 are composed and connected in the same manner as the other two L-poles 2.

Unlike the other two L poles 2, as shown in fig. 9 and 17, a second operating mechanism 22 is disposed at one side of the handle mechanism, the second operating mechanism 22 includes a second lever rotatably mounted in the mounting cavity, a second jump buckle, a second latch 221 and a second reset member 222 are rotatably mounted on the second lever, wherein the second jump buckle is linked with the handle mechanism, the second jump buckle is in snap fit with one end of the first latch 211, one end of the coil assembly 51 is opposite to the other end of the second latch 221, a trip hook matched with the overload protection mechanism is further disposed at the other end of the second latch 221, the second reset member 222 is linked with the second latch 221, the second reset member 222 is matched with the side wall of the mounting cavity to provide a reset force for the second latch 221, and in addition, a groove structure serving as a second connecting portion 223 is disposed on the second reset member 222. Of course, the second operating mechanism 22 and the first operating mechanism 21 may have the same structure.

In addition, an indication window 17 is also provided at the upper portion of the L-pole 2 provided with the second operating mechanism 22, and the indication window 17 is used for indicating whether the second operating mechanism 22 is at the opening position or the closing position, in the same manner as the indication windows 17 of the other two L-poles 2.

In this embodiment, as shown in fig. 1 and 10, the N-pole 4 is disposed in the mounting cavity at the side of the most edge, that is, the N-pole 4 and the drain electrode 3 are respectively located at two sides of the L-pole 2 provided with the second operating mechanism 22, and the N-pole contact mechanism of the N-pole 4 is driven by the second operating mechanism 22, so that the mounting cavity of the N-pole 4 can be further compressed.

As shown in fig. 10 and 19, the N-pole contact mechanism includes an N-pole moving contact and an N-pole static contact that are mutually matched, where the N-pole moving contact is connected with the second lever in a linkage manner, the N-pole static contact is disposed in the middle of the N-pole 4, an N-pole striking plate 42 is disposed on one side of the N-pole contact mechanism, the N-pole striking plate 42 is parallel to and close to the partition 13 of the N-pole 4, a first end of the N-pole striking plate 42 is connected with the N-pole static contact, preferably, the first end of the N-pole striking plate 42 is bent to form the N-pole static contact 421, a contact is disposed on a side opposite to the N-pole moving contact of the N-pole static contact 421 to form the N-pole static contact, the plane of the N-pole static contact is perpendicular to the plane of the N-pole striking plate 421, the plane of the N-pole striking plate 42 is perpendicular to the width direction of the circuit breaker, the plane of the N-pole static contact plate is parallel to the width direction of the circuit breaker, and a second end of the N-pole striking plate 42 is connected with the coil assembly 51 of an adjacent L-pole 2 through the wire 6. Further, a positioning groove 15 for positioning the N-pole arc striking plate 42 is provided on the partition plate 13 of the N-pole 4, as shown in fig. 10, the positioning groove 15 is obliquely provided so that one end of the positioning groove 15 is located at one side of the N-pole fixed contact, the other end of the positioning groove 15 is provided with a threading hole, and the threading hole penetrates the partition plate 13 of the N-pole 4 corresponding to one side of the handle mechanism, that is, the positioning groove 15 is obliquely provided so as to extend obliquely upwards from the position corresponding to the N-pole fixed contact to the position close to the handle mechanism.

Since the widths of the two mounting cavities for mounting the N-pole 4 and the L-pole 2 provided with the second operating mechanism 22 are small, the N-pole connection terminal 43 and the L-pole connection terminal 24 may occupy two side positions of the drain electrode 3, and at this time, the L-pole connection terminal 24 is located in the drain electrode 3, and the N-pole connection terminal 43 is located at two ends of the L-pole 2 and the N-pole 4.

In combination with fig. 19, a structure of an N-pole arc striking plate 42 is provided, the N-pole arc striking plate 42 includes a strip-shaped plate parallel to the partition 13 of the N-pole 4, the strip-shaped plate side edge near the first end of the strip-shaped plate extends outwards and twists to form an N-pole static contact plate 421 opposite to the strip-shaped plate side edge, the partition 13 of the N-pole 4 is perpendicular to the N-pole static contact plate 421, a contact is arranged on a side plate surface of the N-pole static contact plate 421 opposite to the strip-shaped plate side edge, a welding groove 422 is arranged at the second end of the strip-shaped plate, the height difference between the groove bottom surface of the welding groove 422 and the surface of the partition 13 of the N-pole 4 is 1.3mm, the groove depth of the positioning groove 15 is 2.4mm, a wire 6 is welded in the welding groove 422, and the other end of the wire 6 passes through a threading hole to be connected with a coil assembly 51. In this embodiment, the N-pole arc striking plate 42 allows a narrow N-pole to meet the switching-off function, and the arc thereof is small and can be introduced into the triangular region of the right lower side of the partition 13 of fig. 10.

As shown in fig. 1-3 and 5-9, the drain electrode 3 is disposed in the middle-most mounting cavity, and the drain electrode 3 includes a drain handle mechanism 32, a third operating mechanism 31, a connecting rod 34, a solenoid 52 in the electromagnetic system 5, a circuit board 36, an electromagnetic relay 35, and a test button circuit. As shown in fig. 5, the electric leakage handle mechanism 32 is connected to the third operating mechanism 31 in a linkage manner and disposed on the upper portion of the electric leakage protection electrode 3, and the electromagnetic coil 52 is disposed below the electric leakage handle mechanism 32 and on one side of the third operating mechanism 31, in this embodiment, the electromagnetic coil 52 is disposed in parallel with the plurality of coil assemblies 51, and the electromagnetic coil 52 is separated from the adjacent coil assemblies 51 by the partition 13, so that the positions of the electromagnetic coil 52 and the coil assemblies 51 corresponding to each mounting cavity are the same, and the electromagnetic coil 52, the circuit board 36 and the electromagnetic relay 35 cooperate together to drive the third operating mechanism 31.

As shown in fig. 5, the third operating mechanism 31 includes a third lever 311 that is rotatably assembled, the third lever 311 is connected with the electric leakage handle mechanism 32 in a linkage manner, a driving arm 312 is disposed at one end of the third lever 311, a connecting rod 34 is coaxially rotatably assembled with the third lever 311, and the third lever 311 is linked with the operating mechanisms of the two adjacent L poles 2 through the connecting rod 34, that is, the first lever, the second lever and the third lever 311 are connected together in a linkage manner through the connecting rod 34.

In combination with fig. 18, a specific structure of the connecting rod 34 is provided, the connecting rod 34 includes a rotating portion 344 and a U-shaped plate, the rotating portion 344 is in a fan-shaped structure, the fan-shaped structure is provided with a hollow area to reduce the overall weight of the connecting rod 34, a rotating connecting groove is provided at the center of the rotating portion 344, a first rod body 34a and a second rod body 34b are respectively formed by protruding along the radial direction of the rotating connecting groove, the end of the first rod body 34a is bent along the direction parallel to the central axis of the rotating connecting groove to form a rod-shaped third linkage portion 343, the driving arm 312 of the third lever 311 is located between the electromagnetic coil 52 and the third linkage portion 343, an actuating mechanism is provided between the driving arm 312 and the electromagnetic relay 35, the electromagnetic relay rotates the driving arm 312 through an actuating assembly, the U-shaped plate is connected to the end of the third linkage portion 343 as the first linkage portion 341, the first connecting portion 212 of the first lock catch 211 is clamped in the hollow area of the U-shaped plate, a protruding shaft is provided at one side of the second rod body 34b opposite to the third linkage portion 343, the protruding shaft is used as the second linkage portion 342 and is formed by bending along the direction parallel to the central axis of the rotating connecting groove, and the second linkage portion 342 passes through the second linkage portion 342 and the second linkage portion 223.

When the circuit breaker is switched on, the operating mechanisms of the L poles 2 rotate clockwise, so that the connecting rod 34 rotates clockwise along with the operating mechanisms of the L poles 2, in this embodiment, the first operating mechanism 21 and the second operating mechanism 22 of the two L poles 2 adjacent to the drain protection electrode 3 rotate towards the switching-on direction, so that the connecting rod 34 rotates to the switching-on position under the cooperation of the first connecting part 212 and the first linkage part 341, the second connecting part 223 and the second linkage part 342, the connecting rod 34 rotates to the switching-on position in two cases, the first case is that no leakage fault occurs, the third operating mechanism 31 is at the switching-on position at this moment, and the driving arm 312 and the third linkage part 343 are not matched in the process of rotating the connecting rod 34 to the switching-on position, so that the third operating mechanism 31 is not influenced; the second is to release the leakage fault for the circuit breaker, at this time, the third operating mechanism 31 is in a switching-off state, and when the connecting rod 34 rotates to a switching-on position, the driving arm 312 cooperates with the third linkage part 343, so as to drive the first operating mechanism 21, the second operating mechanism 22 and the third operating mechanism 31 to be in the switching-on position at the same time.

When the breaker is normally opened, that is, when the breaker is opened without leakage faults, the operating mechanism of the L electrode 2 rotates anticlockwise, so that the two L electrodes 2 adjacent to the leakage protection electrode 3 rotate in the opening direction under the linkage of the connecting rod 34, at the moment, the connecting rod 34 is only used for linking the operating mechanisms of the two L electrodes 2, the connecting rod 34 rotates along with the operating mechanism of the L electrode 2 in the opening direction and does not drive the third operating mechanism 31, so that the third operating mechanism 31 does not act, in the embodiment, when the two L electrodes 2 positioned on the same side of the leakage protection electrode 3 are opened, the first lock catch 211 of the first operating mechanism 21 rotates anticlockwise, the connecting rod 34 rotates anticlockwise by being matched with the first linking part 341 by the first connecting part 212, at the moment, the second linking part 342 drives the second operating mechanism 22 to rotate in the opening direction by the second linking part 223, and similarly, when the single L electrode 2 positioned on the side of the leakage protection electrode 3 is opened, the second operating mechanism 22 drives the first operating mechanism 21 to rotate in the opening direction by the connecting rod 34, but in the opening direction of the L electrode 2, the third operating mechanism 312 is triggered in the opening process of the rotation of the L electrode 2, and does not act on the third operating mechanism 312;

when an electric leakage fault occurs, the operating mechanism of the electric leakage breaker drives the operating mechanisms of the two adjacent L poles 2 to jointly rotate towards the opening direction through the connecting rod 34, specifically, when the electric leakage fault occurs, the driving arm 312 rotates and the connecting rod 34 rotates anticlockwise through triggering the third linkage part 343, at the moment, the first linkage part 341 is matched with the first connecting part 212 and the second linkage part 342 at the same time with the second connecting part 223, and the first operating mechanism 21 and the second operating mechanism 22 are driven to simultaneously rotate anticlockwise for opening.

In the present embodiment, the first connecting portion 212 is disposed at the lower portion of the first lock catch 211, and the second connecting portion 223 is disposed at the second reset element 222, so that the first linking portion 341 of the link 34 is lower than the second linking portion 342, but the link 34 is not limited to the above-mentioned shape, and the shapes of the first linking portion 341, the second linking portion 342, and the third linking portion 343 may be adjusted accordingly.

In this embodiment, as shown in fig. 6-9, the installation space is located at the lower part of the leakage protection electrode 3, that is, corresponding to the lower part of the third operating mechanism 31, a notch 18 opposite to the installation space is formed in the bottom wall of the installation cavity, the operating opening is closed by a cover plate 14, the circuit board 36 and the electromagnetic relay 35 are fixed at one side of the cover plate 14 and correspondingly placed in the installation space, a clamping structure is arranged at the edge of the installation space, the circuit board 36 and the electromagnetic relay 35 are limited in the installation space by the clamping structure, as shown in fig. 6-8, the clamping structure comprises a first clamping groove 161, a second clamping groove 162 and at least one baffle 163, wherein the first clamping groove 161 is matched and clamped with the side of the circuit board 36, the circuit board 36 is positioned by the baffle 163, three baffles 163 are arranged in fig. 6 and 8, each baffle 163 is used for positioning three sides of the circuit board 36, the other side of the circuit board 36 is fixedly connected with the cover plate 14, two opposite baffles 163 are arranged in the installation space, and form a first installation space and a second installation space is also correspondingly assembled with the first installation space, and a first installation space is correspondingly arranged in the installation space, and a second installation space is correspondingly arranged in the installation space is also matched with the first installation space, and is formed in the installation space, and is matched with the installation space, and is provided with the installation space.

The leakage protection electrode 3 is further provided with a test button loop device 33, the test button loop device 33 comprises a test loop and a test button, the leakage test button loop is powered from a main circuit of the circuit breaker, the test button is slidably assembled in button holes arranged on the upper portion of the leakage protection electrode 3, preferably the button holes and the leakage handle mechanism 32 are respectively arranged at the left end and the right end of the upper portion of the leakage protection electrode 3, the test button is pressed to operate the on or off of the test loop in a switching-on state of the circuit breaker, the test loop is arranged along the upper portion and the side position of the leakage protection electrode 3 so as to save space, connection is facilitated, and the test loop can adopt single break points, double break points and other structures.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The utility model provides a circuit breaker, includes the shell be provided with a plurality of circuit breaker poles side by side in the shell, a plurality of circuit breaker poles include two L utmost point (2) at least, are provided with a drain electrode (3) between two L utmost point (2) a third operating device (31) one side of drain electrode (3) is equipped with solenoid (52) of electromagnetic system (5), its characterized in that: a connecting rod (34) is rotatably arranged on one side of the electromagnetic coil (52), the connecting rod (34) links and connects the third operating mechanism (31) and the operating mechanisms of two adjacent L poles (2),

when the breaker is switched on, the connecting rod (34) rotates to a switching-on position along with the operating mechanisms of the leakage protection electrode (3) and the two adjacent L poles (2),

when the breaker is opened, the connecting rod (34) rotates along with the operating mechanisms of the two L poles (2) adjacent to the drain electrode (3) in the opening direction, but the third operating mechanism (31) does not act;

when the leakage fault occurs, the third operating mechanism (31) drives the operating mechanisms of the two adjacent L poles (2) to jointly rotate towards the opening direction through the connecting rod (34).

2. A circuit breaker according to claim 1, characterized in that: the connecting rod (34) comprises a first linkage part (341), a second linkage part (342) and a third linkage part (343), the first linkage part (341) and the second linkage part (342) are respectively connected with the operating mechanisms of the two adjacent L poles (2) in a linkage way, and a driving arm (312) of the third operating mechanism (31) is positioned between the third linkage part (343) and the electromagnetic coil (52).

3. A circuit breaker according to claim 2, characterized in that: the third operating mechanism (31) comprises a third lever (311), the third lever (311) is coaxially and rotatably assembled with the connecting rod (34), and one end of the third lever (311) is provided with a driving arm (312) matched with the third linkage part (343).

4. A circuit breaker according to claim 2 or 3, characterized in that: the leakage protection electrode (3) is further rotatably provided with a leakage handle mechanism (32), the leakage handle mechanism (32) is linked with the third operating mechanism (31), when no leakage fault occurs, the leakage handle mechanism (32) is located at a closing position, and when the leakage fault occurs, the leakage handle mechanism (32) swings to a separating brake position.

5. A circuit breaker according to claim 2, characterized in that: the operating mechanisms of two L poles (2) adjacent to the drain electrode (3) are respectively a first operating mechanism (21) and a second operating mechanism (22), the first operating mechanism (21) comprises a first lock catch (211) provided with a first connecting portion (212), the first lock catch (211) is connected with a first linkage portion (341) of a connecting rod (34) through the first connecting portion (212), the second operating mechanism (22) comprises a second lock catch (221) provided with a second connecting portion (223), and the second lock catch (221) is connected with a second linkage portion (342) of the connecting rod (34) through the second connecting portion (223).

6. A circuit breaker according to claim 5, wherein: the first connecting portion (212) is of a boss structure, and the second connecting portion (223) is of a groove structure.

7. A circuit breaker according to claim 2, characterized in that: the connecting rod (34) comprises a rotating part (344) and a U-shaped plate, the rotating part (344) is provided with a rotating connecting groove, a first rod body (34 a) and a second rod body (34 b) are respectively formed by protruding in the radial direction of the rotating connecting groove, the tail end of the first rod body (34 a) is bent in the direction parallel to the central axis of the rotating connecting groove to form a rod-shaped third linkage part (343), the U-shaped plate is used as the first linkage part (341) to be connected at the tail end of the third linkage part (343), a protruding shaft is protruding from one side of the second rod body (34 b) opposite to the third linkage part (343), and the protruding shaft is used as the second linkage part (342) to be parallel to the central axis of the rotating connecting groove.

8. A circuit breaker according to claim 7, wherein: the rotating part (344) is of a fan-shaped structure, and the fan-shaped structure is provided with a hollowed-out area.

9. A circuit breaker according to claim 1, characterized in that: two breaker poles are arranged on two sides of the drain electrode (3) in parallel, the two breaker poles on one side of the drain electrode (3) are L poles (2), and the two breaker poles on the other side of the drain electrode (3) are L poles (2) and N poles (4) respectively.

10. A circuit breaker according to claim 9, characterized in that: two L poles (2) positioned on the same side of the drain electrode (3) comprise first operating mechanisms (21), two adjacent first operating mechanisms (21) are connected in a linkage way through an assembling shaft (25), the L poles (2) positioned on the other side of the drain electrode (3) comprise second operating mechanisms (22), and the N poles (4) comprise N pole contact mechanisms driven by the second operating mechanisms (22).