CN214123822U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker. The circuit breaker includes: a housing having a first mounting space formed in a front side thereof, a second mounting space formed in a rear side thereof to be spaced apart from the first mounting space, and a transmission space formed in a lower portion thereof; the arc extinguishing mechanism is fixed in the first mounting space; the first circuit breaking mechanism is arranged in the first installation space and below the arc extinguishing mechanism; the second circuit breaking mechanism is arranged in the second installation space; the transmission mechanism is arranged in the transmission space; the second circuit breaking mechanism is linked with the first circuit breaking mechanism through the transmission mechanism, and the first circuit breaking mechanism is linked with the arc extinguishing mechanism. The utility model discloses a rationally set up spatial layout, reduced the whole volume of the circuit breaker that has two or more circuit breaking mechanism, under the prerequisite of guaranteeing safety, realized the handcart of circuit breaker and structured regularization.

Description

Circuit breaker

Technical Field

The utility model relates to an electric power industry supplies distribution technical field, especially relates to a circuit breaker.

Background

With the rapid development of industrialization and urbanization in China, the power demand will continuously increase in a long period, the development task of the power grid is heavy, and the development of a strong smart power grid is urgent. Meanwhile, smart grids are also moving towards extra-high voltage and ultra-high voltage levels. Therefore, research and development of a high-performance and high-reliability circuit breaker matched with the intelligent power grid can provide powerful technical guarantee for the safety and reliability of power supply of the intelligent power grid.

However, the traditional power supply and distribution circuit breaker has the defects of unreasonable space distribution, large size and the like, and the application scenes are limited.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model discloses in order to solve at least one in the above technical problem partially at least.

(II) technical scheme

In order to achieve the above object, the present invention provides a circuit breaker. The circuit breaker includes: a housing having a first mounting space formed in a front side thereof, a second mounting space formed in a rear side thereof to be spaced apart from the first mounting space, and a transmission space formed in a lower portion thereof; the arc extinguishing mechanism is fixed in the first mounting space; the first circuit breaking mechanism is arranged in the first installation space and below the arc extinguishing mechanism; the second circuit breaking mechanism is arranged in the second installation space; the transmission mechanism is arranged in the transmission space; the second circuit breaking mechanism is linked with the first circuit breaking mechanism through the transmission mechanism, and the first circuit breaking mechanism is linked with the arc extinguishing mechanism.

In some embodiments of the present invention, the housing comprises: the handcart bracket, the inside of the rear side of which forms a second mounting space, and the lower part of which forms a transmission space; and the insulating sleeve is connected to the upper part of the front side of the handcart support, and a first mounting space is formed inside the insulating sleeve.

In some embodiments of the present invention, the method further comprises: the junction box is fixed at the upper part of the rear side of the handcart bracket, and a wiring space is formed in the junction box; the top of the main body part of the junction box is flush with the top of the insulating sleeve, and the wiring space is communicated with the first installation space.

In some embodiments of the present invention, the second disconnection mechanism includes: the mechanism body is fixed in the second mounting space; the moving rod extends downwards from the mechanism body; the first circuit breaking mechanism includes: the mechanism body is accommodated in the first installation space; the moving rod extends upwards from the mechanism body and is connected to a moving contact of the arc extinguishing mechanism; the transmission mechanism includes: the connecting rod shaft is arranged in the middle of the transmission space; the middle part of the connecting rod is rotatably pivoted on the connecting rod shaft, the rear end of the connecting rod is connected to the front end of the moving rod of the second circuit breaking mechanism, and the front end of the connecting rod is upwards connected to the mechanism body of the first circuit breaking mechanism.

In some embodiments of the present invention, the moving rod of the second disconnecting mechanism is disposed obliquely downward toward the connecting rod shaft.

In some embodiments of the present invention, the front end of the connecting rod is connected upward to the mechanism body of the first breaking mechanism by a rod.

In some embodiments of the present invention, the moving rod of the first breaking mechanism is connected to the moving contact of the arc extinguishing mechanism through an insulating pull rod.

In some embodiments of the present invention, a circuit breaker comprises: 1 second circuit breaking mechanism installed in the second installation space; the N groups of first breaking mechanisms and arc extinguishing mechanisms are combined and arranged in the first installation space side by side, and N is more than or equal to 2; the second circuit breaking mechanism is linked with the N first circuit breaking mechanisms through the transmission mechanism, and each circuit breaking mechanism is linked with the arc extinguishing mechanism in the combination.

In some embodiments of the present invention, the transmission mechanism includes: the connecting rod shaft is arranged in the middle of the transmission space; the middle part of the connecting rod is rotatably pivoted with the connecting rod shaft; the front end of the connecting rod is connected with a cross rod, and the cross rod is upwards connected with the mechanism bodies of the N first circuit breaking mechanisms through N rod pieces respectively; or the front end of the connecting rod is upwards connected with 1 first circuit breaking mechanism through a rod piece, and the first circuit breaking mechanism is transversely connected with the other N-1 first circuit breaking mechanisms.

In some embodiments of the present invention, a circuit breaker comprises: m breaker units, wherein M is more than or equal to 2; each circuit breaker unit comprises: 1 group of combination of a first circuit breaking mechanism and an arc extinguishing mechanism, 1 set of second circuit breaking mechanism and 1 set of transmission mechanism; the M groups of first circuit breaking mechanisms and arc extinguishing mechanisms are combined and arranged in the first installation space side by side; the M second circuit breaking mechanisms are arranged in the second installation space side by side; the M transmission mechanisms are arranged in the transmission space side by side; in each breaker unit, the second breaking mechanism is linked with the first breaking mechanism through the transmission mechanism, and the first breaking mechanism is linked with the arc extinguishing mechanism.

In some embodiments of the present invention, the first circuit breaking mechanism is one of the following group: repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism.

In some embodiments of the present invention, the second breaking mechanism is one of the following group: spring circuit-breaking mechanism, repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism.

In some embodiments of the present invention, the first and second circuit breaking mechanisms are independently driven; the first circuit breaking mechanism has shorter time for completing the switching-off and switching-on operations than the second circuit breaking mechanism.

(III) advantageous effects

According to the above technical solution, the utility model discloses at least, one of them of following beneficial effect has:

(1) the inside of the shell is formed as follows: the shell comprises a first installation space, a second installation space and a transmission space, wherein the first installation space is formed inside the front side of the shell, the second installation space separated from the first installation space is formed inside the rear side of the shell, and a first circuit breaking mechanism in the first installation space and a second circuit breaking mechanism in the second installation space are linked through the transmission mechanism in the transmission space.

The utility model discloses a rationally set up spatial layout, reduced the whole volume of circuit breaker, realized having two circuit breaker's of mechanism that opens circuit handcart ization, expanded the application scene of circuit breaker.

(2) The front side of the handcart support is upwards connected with an insulating sleeve, and a first mounting space is formed in the insulating sleeve. First circuit breaking mechanism and vacuum interrupter install in first installation space, have ensured the electrical safety.

(3) A lead box is provided on the top of the second mounting space, and a wiring space is formed inside the lead box. This lead box body part and insulating sleeve are at the top parallel and level to whole circuit breaker is comparatively squarely, and spatial layout is more reasonable, has realized the regularization of circuit breaker under the prerequisite of guaranteeing the circuit breaker security.

(4) A connecting rod shaft is arranged in the middle of the transmission space. The middle part of the connecting rod is rotatably pivoted with the connecting rod shaft. The rear end of the connecting rod is pivoted with the power transmission rod of the second circuit breaking mechanism, the front end of the connecting rod is pivoted with the rod piece of the mechanism body connected with the first circuit breaking mechanism, and the moving rod of the first circuit breaking mechanism is upwards connected to the moving contact of the vacuum arc extinguish chamber. Through so setting up, realized first circuit breaking mechanism, second circuit breaking mechanism and vacuum interrupter's high-efficient linkage.

(5) The moving rod of the second circuit breaking mechanism is obliquely and downwards arranged towards the connecting rod shaft, so that the transmission efficiency is improved, the brake-separating reliability is improved, and the service life of the circuit breaker is prolonged.

(6) The front end of the connecting rod is upwards connected to the mechanism body of the first circuit breaking mechanism through a rod piece; the moving rod of the first circuit breaking mechanism is connected to the moving contact of the arc extinguishing mechanism through an insulating pull rod, so that the system size is reduced, and the power utilization safety is ensured.

(7) The circuit breaker includes: and the combination of 1 second circuit breaking device and N groups of first circuit breaking mechanisms and arc extinguishing mechanisms. 1 second breaking mechanism links N independent operation's first breaking mechanism, and then controls N arc extinguishing mechanism, except can unifying the action, can also independently act respectively, realizes the technique of controlling mutually, makes the circuit breaker time-division, combined floodgate at the electric current zero crossing point, can reduce arcing time and combined floodgate inrush current like this, improves the life of circuit breaker greatly and the protection to equipment.

(8) The circuit breaker includes: m breaker units, wherein M is more than or equal to 2; each circuit breaker unit comprises: 1 combination of the first circuit breaking mechanism and the arc extinguishing mechanism, 1 second circuit breaking mechanism and 1 transmission mechanism. Each circuit breaker unit can be operated independently, and therefore three-phase independent fast and slow actions can be achieved.

(9) The first circuit breaking mechanism and the second circuit breaking mechanism are driven independently, and the second circuit breaking mechanism can also meet the mechanism drive of normal switching-on and switching-off speeds, so that the circuit breaker can also be driven in a mode of a common circuit breaker under the condition of meeting the use requirement, and the application scene is expanded.

(10) The first circuit breaking mechanism has shorter time for completing the switching-off operation than the second circuit breaking mechanism, can realize rapid switching-off and switching-on by using the rapid split-phase operating mechanism when a fault occurs, avoids the failure condition of switching-off action due to the fact that the secondary switching-off of rapid and slow combination can be realized during the switching-off, and improves reliability and safety. Furthermore, after the second circuit breaking mechanism completes the brake opening action, the first circuit breaking mechanism is reset to recover the brake closing position, so that the fatigue damage caused by quick driving is avoided, the reliability of the whole device is improved, and the service life of the whole device is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker according to a first embodiment of the present invention.

Fig. 2A is an overall schematic diagram of a circuit breaker according to a second embodiment of the present invention.

Fig. 2B is a cross-sectional view of the circuit breaker of fig. 2A taken along plane B-B.

[ description of main reference symbols in the drawings ]

100-handcart support;

200-an insulating sleeve; 211-cantilever;

300-a junction box;

410. 410', 410 "-first circuit breaking mechanism;

411-mechanism body; 412-sports pole;

413. 413', 413 "-rod;

420-a second circuit breaking mechanism;

421-mechanism body; 422-motion bar;

430. 430', 430' -vacuum interrupter;

431. 431', 431' -insulating tie rod;

510-a connecting rod; 520-link shaft;

s1 — a first installation space; s2 — a second installation space; s3-connection space; s4-drive space.

Detailed Description

The utility model discloses a rationally set up spatial layout, reduced the whole volume of circuit breaker, realized the handcart-type of the circuit breaker that has two or more circuit breaking mechanism, extended its application scene. In addition, through various measures, the safety and the reliability of the circuit breaker are enhanced, and the application scene of the circuit breaker is expanded.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

Before going into more detail with reference to the examples, it is necessary to clarify the meaning of the directional terms. In the following description, directional terms such as "left", "right", "front", "rear", "up", "down", etc. refer to the drawings or the direction of an operator only for the purpose of easy understanding, and do not limit the scope of the present invention. In addition, the circuit breaker in the following description may also be a left mirror image or a right mirror image or an upper mirror image and a lower mirror image, which are all within the protection scope of the present invention.

The utility model provides an at first, it divide into four bibliographic categories on the whole: a first part including a vacuum interrupter and a first circuit breaking mechanism; a second portion comprising a second circuit interrupting mechanism; a third portion comprising a transmission mechanism; including the fourth portion of the lead box. How with this four bibliographic categories rationally distributed, realize the handcart of circuit breaker, be the utility model discloses the problem of required solution.

Fig. 1 is a schematic structural diagram of a circuit breaker according to a first embodiment of the present invention. In actual use, the left side as viewed in fig. 1, i.e., the side of the insulating sleeve 200, faces the operator.

As shown in fig. 1, the case of the circuit breaker includes: a hand truck carriage 100 and an insulating sleeve 200. The handcart frame 100 has a cart shape with a lower front and a higher rear, and has a second mounting space S2 formed inside the rear side thereof and a transmission space S4 formed below the rear side thereof. The front side of the handcart bracket is connected with an insulating sleeve 200 upwards. A first mounting space S1 is formed in the insulative sleeve to be spaced apart from the second mounting space S2. And a junction box 300 is fixed on the upper part of the rear side of the handcart bracket, and a wiring space S3 communicated with the first installation space is formed in the junction box.

Wherein, the vacuum interrupter 430 and the first breaking mechanism 410 are installed in the first installation space S1 from top to bottom; the second breaking mechanism 420 is installed in the second installation space S2, and is linked with the first breaking mechanism 410 through a transmission mechanism in the transmission space; the cable is introduced into the first installation space S1 through the wire connection space S3, and is connected to the corresponding contact of the vacuum interrupter. The whole circuit breaker is reasonable and square in overall spatial layout, and miniaturization and handcart miniaturization of the circuit breaker with the two circuit breaking mechanisms are achieved.

The following describes each component of the circuit breaker of the present embodiment in detail.

Referring to fig. 1, the handcart bracket 100 has a cart shape with a lower front and a higher rear, and a second mounting space S2 is formed at the rear side thereof. The second breaking mechanism 420 is fixed in the second installation space. The second breaking mechanism 420 includes: a mechanism body 421; and a motion bar 422 extending downward from the mechanism body. The second installation space S2 is separated from the first installation space S1 in which the vacuum interrupter is accommodated, thereby improving the safety of the system.

The lower part of the handcart bracket forms a transmission space S4. A transmission mechanism is provided in the transmission space S4. This drive mechanism includes: a link shaft 520 provided at an intermediate position of the transmission space; the middle part of the connecting rod 510 is pivoted on the connecting rod shaft. The moving rod 422 of the second disconnecting mechanism is disposed obliquely downward toward the link shaft and pivotally connected to the rear end of the link 510. The obliquely downward moving rod 422 not only helps to improve the transmission efficiency, but also can increase the opening reliability and the service life of the circuit breaker.

At the upper portion of the rear side of the handcart frame, a terminal box 300 is provided, and a terminal space S3 is formed inside. The top of the main part of this terminal box is parallel and level basically with the insulating sleeve's of front side top to whole circuit breaker is comparatively squarely, is favorable to installing and arranges, has also promoted the mechanical strength and the reliability of whole circuit breaker simultaneously.

The cable is connected to the relevant joint of the vacuum arc-extinguishing chamber in the first installation space through the wiring space S3 in the wiring box and is separated from the positions of the first circuit breaking mechanism and the second circuit breaking mechanism, so that the electric shock risk caused by the damage or the fracture of the cable is avoided.

An insulating sleeve 200 is connected upwards at the front side of the handcart bracket. A first mounting space S1 is formed in the insulative sleeve. The vacuum interrupters 430 and the first breaking mechanism 410 are mounted in the first mounting space S1 from top to bottom. The vacuum interrupter 430 is disposed in the insulating sleeve, so that the safety of the circuit breaker can be improved. The vacuum interrupter 430 is fixed at the top to the top of the insulating sleeve and at the bottom by a cantilever 211 fixed to the sidewall of the insulating sleeve.

It will be appreciated by those skilled in the art that other types of arc extinguishing mechanisms besides vacuum arc extinguishing chambers may be used to achieve the same effect and will not be described in detail herein.

The first breaking mechanism 410 is disposed in the first installation space S1 below the vacuum interrupter. The first circuit breaking mechanism includes: a mechanism body 411, and a moving rod 412 extending upward from the housing. The moving rod 412 is connected upward to the moving contact of the vacuum interrupter through an insulating rod 431. The mechanism body 411 passes to the upper end of the rod 413. The lower end of the rod 413 is pivotally connected to the front end of the link 510.

As will be understood by those skilled in the art, the moving rod 412 of the first breaking mechanism is connected to the movable contact of the vacuum interrupter through the insulating rod 431, so that the vacuum interrupter and the first breaking mechanism can be electrically isolated, and the safety of the whole circuit breaker can be enhanced.

Wherein the first circuit breaking mechanism may be one of the following group: repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism; the second circuit breaking mechanism may be one of the following group: spring circuit-breaking mechanism, repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism. The working principle and the connection mode of various mechanisms are clear to those skilled in the art and are not described in detail herein.

In this embodiment, the first circuit breaking mechanism 410 and the second circuit breaking mechanism 420 can independently drive the switching action of the vacuum interrupter:

1. first circuit breaking mechanism independently drives vacuum interrupter

When the first disconnecting mechanism 410 receives a brake opening command alone, the mechanism body 411 is static; the moving rod 412 moves downwards, so that the moving contact of the vacuum arc-extinguishing chamber is pulled to move downwards through the insulating pull rod 431, and the moving contact and the fixed contact of the vacuum arc-extinguishing chamber are separated, so that the brake is separated.

2. Second breaking mechanism independently drives vacuum interrupter

When the second breaking mechanism 420 receives a switching-off command alone, the moving rod 422 moves obliquely upward to pull the rear end of the connecting rod 510 to move obliquely upward, so that the front end of the connecting rod 510 moves downward to drive the first breaking mechanism 410 to move downward integrally, and the moving contact of the vacuum arc-extinguishing chamber is pulled downward, so that the moving contact and the fixed contact of the vacuum arc-extinguishing chamber are separated, and switching-off is realized.

The above description is based on opening as an example, and persons skilled in the art should understand that the closing process is contrary to the above description, and will not be described herein again.

It should be noted that, the time for the first disconnecting mechanism to complete the opening and closing operation is shorter than that for the second disconnecting mechanism, and the first disconnecting mechanism and the second disconnecting mechanism are controlled by the control system, and the working principle is as follows:

1. normal opening operation

During normal action, the first circuit breaking mechanism 410 does not act, which can be regarded as fixed connection, and the second circuit breaking mechanism 420 drives the moving contact of the vacuum arc-extinguishing chamber to act through the connecting rod 510, so as to realize normal opening and closing actions of the circuit breaker.

Therefore, under the normal use condition, only the second circuit breaking mechanism is utilized to carry out the brake opening action, the fatigue damage caused by the quick action of the first circuit breaking mechanism is avoided, and the service life is prolonged.

2. Fast opening operation

When the fast opening operation is executed, the first opening mechanism 410 and the second opening mechanism 420 are in the closing position, and when the control system needs to fast open or receives the instruction of the superior control system, the control system sends an operation instruction to the first opening mechanism 410 and the second opening mechanism 420:

2.1 the first circuit breaking mechanism 410 drives the moving rod 422, and the moving contact is pulled by the insulating pull rod 431 to realize rapid brake opening and circuit breaking;

2.2 the action time of the second breaking mechanism 420 to perform the opening is longer than that of the first breaking mechanism 410, and after the circuit is disconnected, the moving contact is continuously pulled to perform the opening motion, so as to realize the redundancy action and ensure the disconnection of the circuit.

After the second circuit breaking mechanism 420 completes the opening operation, the first circuit breaking mechanism 410 is reset to recover the closing position, so as to avoid fatigue damage caused by quick driving, ensure the normal operation of subsequent quick opening operation, and ensure the normal operation of the circuit breaker, and the circuit is always in the open state during the period.

3. Fast closing action

When the rapid switching-on action is executed, the first circuit breaking mechanism 410 and the second circuit breaking mechanism 420 are located at the switching-off position, and when the control system judges that rapid switching-on is required or receives the instruction of the superior control system, the control system sends an action instruction to the first circuit breaking mechanism and the second circuit breaking mechanism:

3.1 the first breaking mechanism 410 drives the moving contact to realize rapid closing and conduct the circuit;

3.2 the second breaking mechanism 420 performs closing action for a time longer than that of the first breaking mechanism, and after the circuit is switched on, the moving contact is continuously pushed to perform closing movement and the first breaking mechanism 410 is reset to restore the opening position thereof, so as to ensure that the next quick closing action is normally performed, realize redundant action and ensure that the circuit breaker normally operates, and during this period, the circuit is always in a conducting state.

Therefore, the technical scheme of the embodiment can realize quick opening and closing when a fault occurs, and can realize common opening and closing under the common condition of meeting the use requirement, thereby avoiding fatigue damage caused by quick driving and prolonging the service life of the whole device; meanwhile, the secondary brake opening of fast and slow combination can be realized during brake opening, the condition of failure of brake opening action is avoided, and the reliability and the safety of brake opening are improved.

On this basis, the utility model also provides another kind of circuit breaker, its difference with above-mentioned circuit breaker lies in: the first part comprises a combination of several groups of vacuum interrupters and a first breaking mechanism. The first circuit interrupting mechanism of each set may be controlled to act independently.

In a second exemplary embodiment of the present invention, a circuit breaker of the above type is provided. The second breaking mechanism and the junction box of the circuit breaker are the same as those of the first embodiment, and are not repeated.

Fig. 2A is an overall schematic diagram of a circuit breaker according to a second embodiment of the present invention. Fig. 2B is a cross-sectional view of the circuit breaker of fig. 2A taken along plane B-B. In actual use, the left side as shown in fig. 2A, i.e., the side of the insulative sleeve 200, faces the user.

As shown in fig. 2A and 2B, a combination of three groups of vacuum interrupters and a first breaking mechanism is disposed in a first installation space formed by an insulating sleeve. Wherein the first circuit breaking mechanisms in the 3 combinations can be operated independently.

1. First combination

The first circuit breaking mechanism 410 is connected to a corresponding insulating rod 431 through its moving rod, and the insulating rod 431 is connected to the moving contact of the vacuum interrupter 430. The mechanism body of the first circuit interrupting mechanism 410 extends downward through the rod 413.

2. Second combination

The first breaking mechanism 410 'is connected to a corresponding insulating rod 431' through its moving rod, and the insulating rod 431 'is connected to the movable contact of the vacuum interrupter 430'. The mechanism body of the first circuit interrupting mechanism 410 'extends downwardly through the lever 413'.

3. Third combination

The first breaking mechanism 410 "is connected via its moving rod upwards to a corresponding insulating rod 431", and the insulating rod 431 "is connected upwards to the movable contact of the vacuum interrupter 430". The mechanism body of the first circuit interrupting mechanism 410 "extends downwardly through the lever 413".

Wherein, the lower end of the rod 413, 413', 413 ″ is connected to a cross bar, the middle of which is connected to the front end of a connecting rod, which is the same as the connecting rod mechanism in the above embodiments, so that the same connecting rod can control three first breaking mechanisms at the same time.

In this embodiment, the three independently operated first circuit breaking mechanisms may respectively and independently act, so as to implement a phase control technique, so that the circuit breaker is switched on when the current crosses zero, thereby reducing arcing time and switching-on inrush current, greatly prolonging the service life of the circuit breaker, protecting equipment, and further expanding the application scenario of the circuit breaker.

In addition to the above-described connection method, the linkage method of the 3 first disconnecting mechanisms and the links may be another linkage method, for example: the mechanism body of the middle first breaking mechanism 410' is pivoted downward with the link via a lever. The first circuit breaking mechanisms (410, 410 ') on the two sides are transversely connected with the first circuit breaking mechanism 410' in the middle, so that linkage is realized.

It should be understood that, although the present embodiment includes 3 sets of the combination of the vacuum interrupter and the first breaking mechanism, the present invention is not limited thereto. In other embodiments of the present invention, combinations of 2, 4, 5, 6 or more groups can be also provided, which are all within the scope of the present invention.

Preferably, in order to maintain the balance of the connecting rod, when there are a plurality of sets of the combination of the vacuum interrupters and the first breaking mechanism, the front end of the connecting rod is connected to the middle of the cross bar; the combination of the N groups of the first breaking mechanisms and the arc extinguishing mechanisms is symmetrically arranged relative to the second breaking mechanism.

On this basis, the utility model also provides another kind of circuit breaker, its difference with above-mentioned circuit breaker lies in: the second part comprises N groups of first breaking mechanisms as well, except that the first part comprises a combination of N groups of vacuum interrupters and first breaking mechanisms.

In a third exemplary embodiment of the present invention, a circuit breaker is also provided. The circuit breaker includes: 3 groups of circuit breaker units. Each circuit breaker unit comprises: the first circuit breaking mechanism, the second circuit breaking mechanism and the arc extinguishing mechanism. The combination of the first circuit breaking mechanism and the arc extinguishing mechanism of the 3 groups is arranged in the first installation space side by side, and the 3 second circuit breaking mechanisms are arranged in the second installation space side by side.

In each circuit breaker unit, an arc extinguishing mechanism is fixed in a first mounting space, and a moving rod of the first circuit breaker mechanism is upwards connected to a moving contact of the arc extinguishing mechanism; the second circuit breaking mechanism is fixed in the second installation space and is linked with the corresponding first circuit breaking mechanism through a connecting rod. In each circuit breaker unit, the internal structure of the two circuit breaker mechanisms, the structure of the transmission mechanism, the transmission manner, and the like can be referred to the description of the first embodiment, and the description thereof is omitted.

In this embodiment, each breaker unit can be operated independently, so that three-phase independent fast and slow actions can be realized.

Similarly, although the present embodiment includes 3 sets of breaker units, the present invention is not limited thereto. In other embodiments of the present invention, 2, 4, 5, 6 or more groups of circuit breaker units may be provided, which are all within the scope of the present invention.

Up to this point, three embodiments of the present invention have been described in detail with reference to the accompanying drawings.

It should be noted that for some implementations, if not essential to the invention and well known to those of ordinary skill in the art, they are not illustrated in detail in the drawings or in the description, which can be understood with reference to the related prior art.

Furthermore, the above definitions of the various elements and methods are not limited to the specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by a person of ordinary skill in the art, for example:

(1) the first and second circuit breaking mechanisms may be of other types than those listed in the embodiments;

(2) the connecting rod in the second circuit breaking mechanism can also be vertically arranged downwards;

(3) other types of arc extinguishing mechanisms are possible in addition to the vacuum arc extinguishing chamber.

From the above description, those skilled in the art should clearly recognize the circuit breaker of the present invention.

To sum up, the utility model discloses a rationally set up spatial layout, reduced the whole volume of the circuit breaker that has two or more circuit breaking mechanism, under the prerequisite of guaranteeing safety, realized the handcart of circuit breaker and structure regularization. In addition, the utility model provides a including a plurality of circuit breaker units, or types such as a plurality of circuit breaker structure/arc extinguishing mechanism combination, can realize heterogeneous independent fast slow action, increased the utility model discloses an application scene. The advantages make the utility model discloses high practical value and wide application prospect have.

It should also be noted that throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures will be omitted when it may lead to confusion as to the understanding of the present invention.

And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

Ordinal numbers such as "first," "second," "third," "primary," "secondary," and arabic numerals, letters, etc., used in the specification and claims to modify a corresponding element or step are intended only to distinguish one element (or step) having a certain name from another element (or step) having the same name, and do not imply any ordinal number for the element (or step) nor the order of one element (or step) from another element (or step).

The above-mentioned embodiments, which have been described in detail to illustrate the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims (10)

1. A circuit breaker, comprising:

a housing having a first mounting space formed in a front side thereof, a second mounting space formed in a rear side thereof to be spaced apart from the first mounting space, and a transmission space formed in a lower portion thereof;

the arc extinguishing mechanism is fixed in the first installation space;

the first circuit breaking mechanism is arranged in the first installation space and below the arc extinguishing mechanism;

a second breaking mechanism installed in the second installation space; and

the transmission mechanism is arranged in the transmission space;

the second circuit breaking mechanism is linked with the first circuit breaking mechanism through the transmission mechanism, the first circuit breaking mechanism is linked with the arc extinguishing mechanism, and the first circuit breaking mechanism and the second circuit breaking mechanism are driven independently.

2. The circuit breaker of claim 1, wherein the housing comprises:

the handcart bracket is characterized in that the inside of the rear side of the handcart bracket forms the second mounting space, and the lower part of the handcart bracket forms the transmission space; and

and the insulating sleeve is connected to the upper part of the front side of the handcart support, and the first mounting space is formed inside the insulating sleeve.

3. The circuit breaker of claim 2, further comprising:

the junction box is fixed at the upper part of the rear side of the handcart bracket, and a wiring space is formed in the junction box;

wherein the top of the main body part of the junction box is flush with the top of the insulating sleeve, and the wiring space is communicated with the first mounting space.

4. The circuit breaker of claim 1, wherein:

the second circuit interrupting mechanism includes: the mechanism body is fixed in the second mounting space; a motion bar extending downward from the mechanism body;

the first circuit interrupting mechanism includes: the mechanism body is accommodated in the first installation space; the moving rod extends upwards from the mechanism body and is connected to the moving contact of the arc extinguishing mechanism;

the transmission mechanism includes: the connecting rod shaft is arranged in the middle of the transmission space; and the middle part of the connecting rod is rotatably pivoted on the connecting rod shaft, the rear end of the connecting rod is connected to the front end of the moving rod of the second circuit breaking mechanism, and the front end of the connecting rod is upwards connected to the mechanism body of the first circuit breaking mechanism.

5. The circuit breaker of claim 4, wherein;

the moving rod of the second disconnecting mechanism is arranged obliquely downward toward the connecting rod shaft; and/or

The front end of the connecting rod is upwards connected to the mechanism body of the first circuit breaking mechanism through a rod piece; and/or

The moving rod of the first circuit breaking mechanism is connected to the moving contact of the arc extinguishing mechanism through an insulating pull rod.

6. The circuit breaker of claim 1, comprising:

1 second breaking mechanism installed in the second installation space;

n groups of combinations of the first circuit breaking mechanisms and the arc extinguishing mechanisms are arranged in the first installation space side by side, wherein N is more than or equal to 2;

the second circuit breaking mechanism is linked with the N first circuit breaking mechanisms through the transmission mechanism, and each circuit breaking mechanism is linked with the arc extinguishing mechanism in the combination.

7. The circuit breaker of claim 6, wherein the transmission mechanism comprises: the connecting rod shaft is arranged in the middle of the transmission space; the middle part of the connecting rod is rotatably pivoted with the connecting rod shaft;

the front end of the connecting rod is connected with a cross rod, and the cross rod is upwards connected with the mechanism bodies of the N first circuit breaking mechanisms through N rod pieces respectively; or the front end of the connecting rod is upwards connected with 1 first circuit breaking mechanism through a rod piece, and the first circuit breaking mechanism is transversely connected with the other N-1 first circuit breaking mechanisms.

8. The circuit breaker of claim 1, comprising: m breaker units, wherein M is more than or equal to 2; each circuit breaker unit comprises: 1 combination of the first circuit breaking mechanism and the arc extinguishing mechanism, 1 second circuit breaking mechanism and 1 transmission mechanism;

the M groups of the first circuit breaking mechanisms and the arc extinguishing mechanisms are combined and arranged in the first installation space side by side; the M second breaking mechanisms are arranged in the second installation space side by side; the M transmission mechanisms are arranged in the transmission space side by side;

in each breaker unit, the second breaking mechanism is linked with the first breaking mechanism through the transmission mechanism, and the first breaking mechanism is linked with the arc extinguishing mechanism.

9. The circuit breaker according to any one of claims 1 to 8, characterized in that:

the first circuit breaking mechanism is one of the following group: repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism; and/or

The second breaking mechanism is one of the following group: spring circuit-breaking mechanism, repulsion mechanism, permanent magnetic mechanism, electromagnetic mechanism.

10. The circuit breaker according to any one of claims 1 to 8, wherein the first breaking mechanism is shorter than the second breaking mechanism in time to complete the opening and closing operation.

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