circuit breaker

Abstract

The utility model discloses a circuit breaker, a shell body has a first shell, and a second shell is opposite to first shell setting to form the internal accommodation cavity of circuit breaker together, at least one inner casing body has predetermined accommodation chamber, and it sets up in the inside of shell body and is located between first shell and second shell, operating mechanism and tripping mechanism are installed in the accommodation chamber formed in at least one inner casing body at least partially, and contact system and arc extinguishing mechanism are connected between first shell and second shell and are located in the outside of inner casing body. According to the circuit breaker of the utility model, the electric gas discharge speed is faster, and the product safety performance is better.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to circuit breakers for use in the field of low-voltage electrical applications. Background Technology

[0002] In the field of electrical applications, circuit breakers, as an important electrical product, have overload, short-circuit, and undervoltage protection functions, and are capable of protecting lines and power supplies. Specifically, circuit breakers are used to disconnect and connect load circuits, as well as to disconnect faulty circuits, prevent the escalation of accidents, and ensure safe operation. They are widely used in the field of low-voltage electrical technology. With the continuous development of power grids and the increasing variety of electrical equipment, the breaking performance requirements for molded case circuit breakers in low-voltage distribution networks are becoming increasingly stringent. In the market, molded case circuit breakers are generally divided into double-break and single-break products. Compared with double-break products, single-break products have a cost advantage.

[0003] Currently, single-break molded case circuit breakers on the market typically employ a single-outlet air passage structure. The contact system, arc-extinguishing system, tripping system, and operating system are all housed within the cavity formed by the upper and lower shells of the molded case circuit breaker. The exhaust port is directly formed by the upper and lower shells and is located on one side of the arc-extinguishing system. The disadvantage of this design is that the airflow discharge speed of the exhaust port on one side is relatively slow, and arc backflow into the operating system and tripping system may cause partial system malfunction.

[0004] To further optimize the efficiency of energized gas discharge in single-break molded case circuit breakers, those skilled in the art urgently need to develop a new type of circuit breaker. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a circuit breaker with faster discharge speed of energized gas and better product safety performance.

[0006] A circuit breaker according to an embodiment of the present invention includes: a housing having a first housing; and a second housing disposed opposite to the first housing to jointly form an internal receiving cavity of the circuit breaker; at least one inner housing having a predetermined receiving chamber disposed inside the housing and located between the first housing and the second housing; an operating mechanism and a tripping mechanism at least partially housed and installed in the receiving chamber formed by the at least one inner housing; and a contact system and an arc extinguishing mechanism connected between the first housing and the second housing and located outside the inner housing.

[0007] According to one optional implementation of this utility model, the number of inner shells is one, and the longitudinal section of the inner shell is approximately L-shaped.

[0008] According to another optional implementation of the present invention, the inner housing divides the internal accommodating cavity of the circuit breaker into a first accommodating space and a second accommodating space.

[0009] According to another optional implementation of the present invention, the operating mechanism and the tripping mechanism are located within the first accommodating space.

[0010] According to another optional implementation of this utility model, the contact system and the arc extinguishing mechanism are located in the second accommodating space.

[0011] According to another optional implementation of this utility model, the number of inner shells can be two, so as to form a generally complete closed chamber.

[0012] According to another optional implementation of the present invention, it also has a first exhaust channel located on one side of the circuit breaker and a second exhaust channel located on the other side of the circuit breaker.

[0013] According to another optional implementation of this utility model, the operating mechanism and the tripping mechanism can be pre-installed in the inner housing to form a pre-assembled module.

[0014] According to another optional implementation of this utility model, the circuit breaker is a single-break circuit breaker. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Wherein:

[0016] Figure 1 This is a cross-sectional structural schematic diagram of a circuit breaker according to one embodiment of the present invention;

[0017] Figure 2 This is an exploded view of a circuit breaker according to one embodiment of the present invention, which mainly shows the positional relationship between the first outer shell, the second outer shell, and the inner shell;

[0018] Figure 3 This is a schematic diagram of a circuit breaker according to one embodiment of the present invention, which mainly shows the positional relationship of the inner housing.

[0019] List of reference numerals

[0020] Circuit breaker 100

[0021] 10 outer shell

[0022] First outer shell 11

[0023] Second outer shell 12

[0024] Inner shell 20

[0025] Operating mechanism 30

[0026] Tripping mechanism 40

[0027] Contact system 50

[0028] Arc extinguishing mechanism 60

[0029] First accommodation space 21

[0030] Second accommodation space 22

[0031] First exhaust passage 71

[0032] Second exhaust passage 72 Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of the present utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0034] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0035] To keep the drawings simple, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, components with the same structure or function are only schematically depicted as one or more, or only one or more are labeled. Moreover, the accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention; they are not necessarily drawn to scale.

[0036] In this patent utility model, the nouns and pronouns related to people are not limited to specific genders.

[0037] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the positional relationship between related parts, rather than to define their absolute positions.

[0038] In this article, "first," "second," etc., are used only to distinguish them from each other, and do not indicate their importance or order.

[0039] In this paper, terms such as “parallel” and “perpendicular” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0040] The orientations or positional relationships indicated in this description are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1 As shown, it discloses a cross-sectional structural schematic diagram of a circuit breaker according to one embodiment of the present application. Figure 2 This is an exploded view of a circuit breaker according to one embodiment of the present application, which mainly shows the positional relationship between the first outer shell, the second outer shell, and the inner shell.

[0042] Combination Figure 1 and Figure 2 As shown, the circuit breaker 100 of this utility model includes: a housing 10, at least one inner housing 20, an operating mechanism 30, a tripping mechanism 40, a contact system 50, and an arc-extinguishing mechanism 60. It is worth noting that the housing 10 has a first housing 11 and a second housing 12. The second housing 12 is disposed opposite to the first housing 11 to jointly form the internal receiving cavity of the circuit breaker. Figure 2 As shown, according to a specific embodiment of the present invention, the first outer shell 11 and the second outer shell 12 can be two shells in the upper and lower directions, namely an upper shell and a lower shell.

[0043] Meanwhile, the at least one inner housing 20 of this invention is disposed inside the outer housing 10. The inner housing 20 has a predetermined accommodating chamber and is located between the first outer housing 11 and the second outer housing 12. The operating mechanism 30 and the tripping mechanism 40 are at least partially accommodated and installed within the accommodating chamber formed by the at least one inner housing 20. The contact system 50 and the arc extinguishing mechanism 60 are connected between the first outer housing 11 and the second outer housing 12 and are located outside the inner housing 20. Due to the presence of the inner housing 20, it plays a good role in isolating and protecting electrical components, minimizing the hazards of short-circuit arc backflush operating system and tripping system inside the circuit breaker, and effectively reducing the risk of internal system malfunction.

[0044] Figure 3 This is a schematic diagram of a circuit breaker according to one embodiment of the present invention, mainly showing the positional relationship of the inner housing. It is worth noting that, in conjunction with... Figure 1 and Figure 2 As shown, according to a preferred embodiment of the present invention, the number of inner shells 20 is one. Further as... Figure 3 As shown, preferably, the longitudinal section of the inner housing 20 is approximately L-shaped, thus dividing the internal accommodating cavity of the circuit breaker into a first accommodating space 21 and a second accommodating space 22. The operating mechanism 30 and the tripping mechanism 40 are located in the first accommodating space 21, and the contact system 50 and the arc extinguishing mechanism 60 are located in the second accommodating space 22.

[0045] To further optimize the structural design, according to an optional embodiment of the present invention, the number of inner shells 20 can also be two, so as to form a roughly complete closed chamber, which can further improve the effect of isolating harmful electric arcs from damaging the internal electrical components.

[0046] To better achieve the arc-extinguishing and venting effect of the circuit breaker, the circuit breaker also has a first venting channel 71 and a second venting channel 72. The first venting channel 71 is located on one side of the circuit breaker. The second venting channel 72 is located on the other side of the circuit breaker. In the event of a short circuit, the contacts repel each other, and a large current flows through, causing a large number of energized bodies to be suddenly released. At this time, the two venting channels can simultaneously vent, thus effectively accelerating the gas discharge speed.

[0047] According to a preferred embodiment of this utility model, the operating mechanism 30 and the tripping mechanism 40 can be pre-installed on the inner housing 20 to form a pre-assembled module. This modular assembly method facilitates product assembly and improves production efficiency.

[0048] The circuit breaker described in this utility model is a single-break circuit breaker. In summary, the circuit breaker of this utility model adopts a design with an added inner shell and is equipped with exhaust channels on both sides, allowing airflow to escape more quickly and the electric arc to transfer more rapidly. It also solves the problems of the ion backflush operating mechanism and the tripping mechanism, reducing damage caused by the impact of harmful electric arcs on the internal mechanisms and effectively improving the safety of the circuit breaker.

[0049] It should be noted that relational terms such as "first" and "second" in this document are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] Finally, it should be noted that the above are merely preferred embodiments of this utility model, used only to illustrate the technical solution of this utility model, and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A circuit breaker (100), characterized in that, include: An outer shell (10) having A first outer shell (11); and A second housing (12) is disposed opposite to the first housing (11) to jointly form the internal receiving cavity of the circuit breaker; At least one inner housing (20) having a predetermined receiving chamber disposed inside the outer housing (10) and located between the first outer housing (11) and the second outer housing (12); The operating mechanism (30) and the tripping mechanism (40) are at least partially housed within the receiving chamber formed by the at least one inner housing (20); as well as The contact system (50) and the arc extinguishing mechanism (60) are connected between the first housing (11) and the second housing (12) and are located outside the inner housing (20).

2. The circuit breaker according to claim 1, characterized in that, The number of inner shells (20) is one, and the longitudinal section of the inner shell (20) is approximately L-shaped.

3. The circuit breaker according to claim 1, characterized in that, The inner housing (20) divides the internal accommodating cavity of the circuit breaker into a first accommodating space (21) and a second accommodating space (22).

4. The circuit breaker according to claim 3, characterized in that, The operating mechanism (30) and the tripping mechanism (40) are located in the first accommodating space (21).

5. The circuit breaker according to claim 3, characterized in that, The contact system (50) and the arc extinguishing mechanism (60) are located in the second accommodating space (22).

6. The circuit breaker according to claim 1, characterized in that, The number of inner shells (20) can be two, so as to form a generally complete closed chamber.

7. The circuit breaker according to claim 1, characterized in that, It also has A first venting channel (71) is located on one side of the circuit breaker. A second venting channel (72) is located on the other side of the circuit breaker.

8. The circuit breaker according to claim 1, characterized in that, The operating mechanism (30) and the tripping mechanism (40) can be pre-installed in the inner housing (20) to form a pre-installed module.

9. The circuit breaker according to claim 1, characterized in that, The circuit breaker is a single-break type circuit breaker.

Images