A circuit breaker

Abstract

The utility model provides a circuit breaker, including casing, first shell cover, second shell cover, testing arrangement, contact subassembly and operating device in casing both sides, the contact subassembly includes movable contact and static contact, the casing both sides are established with first shell cover cooperation forms first installation cavity's first installation slot and with second shell cover cooperation forms second installation cavity's second installation slot, still include arc extinguishing device, the arc extinguishing device includes in first installation slot's first arc extinguishing system and in second installation slot's second arc extinguishing system, the first arc extinguishing system includes arc extinguishing shield and sets up in arc extinguishing shield's a plurality of first arc extinguishing piece, the second arc extinguishing system includes a plurality of second arc extinguishing piece, the second installation slot is established with arc extinguishing passageway, is established with the positioning slot for installing a plurality of second arc extinguishing piece in arc extinguishing passageway and is set up up and down interval, the utility model discloses arc extinguishing system simple structure and convenient installation.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a circuit breaker. Background Technology

[0002] Residual current circuit breakers (RCCBs) provide overload, short-circuit, and residual current protection, thus combining the functions of a circuit breaker and a residual current device. Therefore, RCCBs are commonly used protective devices in electrical circuits, widely used in portable electrical equipment and handheld power tools; electrical equipment installed in harsh environments such as dampness and strong corrosion; electrical construction machinery on construction sites; socket circuits in buildings such as schools, businesses, and residences; underwater lighting equipment in swimming pools, fountains, and bathhouses; power supply lines and equipment installed underwater; and electrical medical equipment in hospitals that comes into direct contact with the human body.

[0003] The existing Chinese patent application number CN202110957981.9, entitled "A Residual Current Circuit Breaker," discloses: "A first arc-extinguishing system is provided between the L-stage housing and the intermediate housing, and a second arc-extinguishing system is provided between the N-stage housing and the intermediate housing. The first arc-extinguishing system includes a first arc-extinguishing cover and a first arc-extinguishing plate disposed within the first arc-extinguishing cover. The first arc-extinguishing cover is formed by connecting a first side plate, a second side plate, and a third side plate. The first side plate and the second side plate are arranged in parallel, and the third side plate is located at one end of the first side plate and the second side plate." The side plate has gas-generating holes, and the first arc-extinguishing plate has 9-11 pieces. The second arc-extinguishing system includes a second arc-extinguishing cover and second arc-extinguishing plates disposed inside the second arc-extinguishing cover. The second arc-extinguishing cover is formed by connecting a fourth side plate, a fifth side plate, and a sixth side plate. The fourth side plate and the fifth side plate are arranged parallel to each other, and the sixth side plate is located at one end of the fourth and fifth side plates. The sixth side plate has gas-generating holes, and the number of second arc-extinguishing plates is set to 14 pieces. The second arc-extinguishing cover has a complex structure, occupies a large space, and is difficult to install, thus increasing the overall product volume and reducing production efficiency. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide a circuit breaker with a simple arc extinguishing system structure and easy installation.

[0005] To address the above problems, the following technical solution is provided: A circuit breaker includes a housing, a first housing cover and a second housing cover located on both sides of the housing, a short-circuit protection device, an overload protection device, a testing device, a contact assembly, and an operating device. The contact assembly includes a moving contact and a stationary contact. The operating device is used to control the displacement of the moving contact to achieve opening or closing. The housing has a first mounting groove that mates with the first housing cover to form a first mounting cavity and a second mounting groove that mates with the second housing cover to form a second mounting cavity. The circuit breaker also includes an arc-extinguishing device, which includes a first arc-extinguishing system located in the first mounting groove and a second arc-extinguishing system located in the second mounting groove. The first arc-extinguishing system includes an arc-extinguishing cover and a plurality of first arc-extinguishing plates disposed within the arc-extinguishing cover. The second arc-extinguishing system includes a plurality of second arc-extinguishing plates. An arc-extinguishing channel is provided in the second mounting groove, and positioning grooves for mounting a plurality of second arc-extinguishing plates are provided at intervals in the arc-extinguishing channel.

[0006] In the above structure, the second arc-extinguishing system can achieve arc extinguishing using a number of second arc-extinguishing plates, thereby reducing usage costs, facilitating installation, and reducing the installation space required for the second arc-extinguishing system, thus reducing the overall size of the product. The positioning groove facilitates the positioning and installation of the second arc-extinguishing plates, improving the ease of installation and enhancing the reliability of this invention. The first and second mounting grooves on the housing facilitate the installation of components and allow workers to easily open the first or second housing cover to fully view the internal structure, facilitating disassembly and maintenance, and improving the reliability and ease of use of this invention.

[0007] The present invention is further configured such that a first dividing ridge is provided in the arc extinguishing channel, and a second dividing ridge corresponding to the first dividing ridge is provided in the second shell cover.

[0008] By adopting the above structure, the arc guiding effect of the arc extinguishing channel can be improved, which in turn facilitates the arc extinguishing of the second arc extinguishing system and improves the arc extinguishing effect of this utility model.

[0009] The present invention is further configured such that a positioning port is provided at one end of the second arc extinguishing plate, and a limiting port that cooperates with the positioning port is provided in the positioning groove.

[0010] In the above structure, the stability of the second arc-extinguishing plate can be improved by the combination of the positioning port and the limiting port, and it can be easily positioned and installed, thereby improving the reliability of this utility model.

[0011] The present invention is further configured such that an arc-shaped opening is provided at one end of the second arc-extinguishing plate facing the contact component.

[0012] The above structure facilitates the arc guiding and extinguishing of the second arc extinguishing plate, thereby improving the arc extinguishing efficiency and effect of this invention.

[0013] The present invention is further provided that the inner wall of the second shell cover is provided with a slot that is adapted to the second arc extinguishing plate.

[0014] In the above structure, the slot can be set to cooperate with the positioning slot to limit the second arc extinguishing plate, thereby improving the stability of the second arc extinguishing plate and improving the reliability of this utility model.

[0015] The present invention is further provided that the inner wall of the second shell cover is provided with positioning blocks located outside the slot on both sides of the second arc extinguishing plate.

[0016] By adopting the above structure, the stability of the second arc extinguishing plate can be further improved, the installation strength of the second arc extinguishing plate can be improved, and the reliability of this utility model can be improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structure of the first arc extinguishing system installed in the first mounting groove in this utility model.

[0020] Figure 4 This is a schematic diagram of the second arc-extinguishing system installed in the second mounting slot in this utility model.

[0021] Figure 5 This is a schematic diagram of the internal structure of the second mounting slot in this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of the second shell cover, the second arc extinguishing plate, and the test device in this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the first shell cover, the shell, and the second shell cover in this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the second arc-extinguishing plate in this utility model.

[0025] The labels in the diagram have the following meanings: 1-Shell; 2-First shell cover; 3-Second shell cover; 4-Short circuit protection device; 5-Overload protection device; 6-Test device; 7-Contact assembly; 8-Operating device; 71-Moving contact; 72-Static contact; 11-First mounting slot; 12-Second mounting slot; 9-Arc extinguishing device; 91-First arc extinguishing system; 92-Second arc extinguishing system; 911-Arc extinguishing cover; 912-First arc extinguishing plate; 921-Second arc extinguishing plate; 13-Arc extinguishing channel; 14-Positioning slot; 15-First separating edge; 31-Second separating edge; 9211-Positioning port; 141-Limiting port; 9212-Arc-shaped port; 32-Slot; 33-Positioning block. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] like Figures 1 to 8 The circuit breaker shown includes a housing 1, a first housing cover 2 and a second housing cover 3 located on both sides of the housing 1, a short-circuit protection device 4, an overload protection device 5, a testing device 6, a contact assembly 7, and an operating device 8. The contact assembly 7 includes a moving contact 71 and a stationary contact 72. The operating device 8 is used to control the displacement of the moving contact 71 to realize opening or closing the circuit breaker. The housing 1 has a first mounting groove 11 that mates with the first housing cover 2 to form a first mounting cavity, and a second mounting groove 12 that mates with the second housing cover 3 to form a second mounting cavity. It also includes... The device includes an arc-extinguishing device 9, which includes a first arc-extinguishing system 91 located in a first mounting groove 11 and a second arc-extinguishing system 92 located in a second mounting groove 12. The first arc-extinguishing system 91 includes an arc-extinguishing cover 911 and a plurality of first arc-extinguishing plates 912 disposed within the arc-extinguishing cover 911. The second arc-extinguishing system 92 includes a plurality of second arc-extinguishing plates 921. An arc-extinguishing channel 13 is provided in the second mounting groove 12, and a positioning groove 14 is provided in the arc-extinguishing channel 13 at vertical intervals for installing a plurality of second arc-extinguishing plates 921.

[0029] In the above structure, the second arc-extinguishing system 92 can extinguish the arc using a plurality of second arc-extinguishing plates 921, thereby reducing the cost of use, facilitating installation, and reducing the installation space of the second arc-extinguishing system 92, thus reducing the overall size of the product. The positioning groove 14 facilitates the positioning and installation of the second arc-extinguishing plates 921, thereby improving the ease of installation and the reliability of the invention. The first mounting groove 11 and the second mounting groove 12 on the housing 1 facilitate the installation of components and allow workers to easily open the first housing cover 2 or the second housing cover 3 to fully view the internal structure, facilitating disassembly and maintenance, and improving the reliability and ease of use of the invention.

[0030] In this embodiment, the arc extinguishing channel 13 is provided with a first dividing ridge 15 protruding inside, and the second shell cover 3 is provided with a second dividing ridge 31 corresponding to the first dividing ridge 15.

[0031] By adopting the above structure, the arc guiding effect of the arc extinguishing channel 13 can be improved, which in turn facilitates the arc extinguishing of the second arc extinguishing system 92, thereby improving the arc extinguishing effect of this utility model.

[0032] In this embodiment, the second arc-extinguishing plate 921 has a positioning port 9211 at one end, and the positioning groove 14 has a limiting port 141 that cooperates with the positioning port 9211.

[0033] In the above structure, the positioning port 9211 and the limiting port 141 cooperate to clamp the second arc extinguishing plate 921, which can improve the stability of the second arc extinguishing plate 921 and facilitate its positioning and installation, thereby improving the reliability of this utility model.

[0034] In this embodiment, the second arc-extinguishing plate 921 has an arc-shaped opening 9212 at one end facing the contact component 7.

[0035] The above structure facilitates the arc guiding and arc extinguishing of the second arc extinguishing plate 921, thereby improving the arc extinguishing efficiency and arc extinguishing effect of this utility model.

[0036] In this embodiment, a slot 32 adapted to the second arc extinguishing plate 921 is provided on the inner wall of the second shell cover 3.

[0037] In the above structure, by setting the slot 32, it is easy for it to cooperate with the positioning slot 14 to limit the second arc extinguishing plate 921, thereby improving the stability of the second arc extinguishing plate 921 and improving the reliability of this utility model.

[0038] In this embodiment, positioning blocks 33 located outside the slot 32 are provided on both sides of the second arc extinguishing plate 921 on the inner wall of the second shell cover 3.

[0039] By adopting the above structure, the stability of the second arc extinguishing plate 921 can be further improved, and the installation strength of the second arc extinguishing plate 921 can be improved, thereby improving the reliability of this utility model.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A circuit breaker, comprising a housing, a first housing cover and a second housing cover located on both sides of the housing, a short-circuit protection device, an overload protection device, a testing device, a contact assembly, and an operating device, wherein the contact assembly includes a moving contact and a stationary contact, and the operating device is used to control the displacement of the moving contact to realize opening or closing the circuit breaker; the housing is provided with a first mounting groove that mates with the first housing cover to form a first mounting cavity and a second mounting groove that mates with the second housing cover to form a second mounting cavity, characterized in that: It also includes an arc extinguishing device, which includes a first arc extinguishing system located in a first mounting slot and a second arc extinguishing system located in a second mounting slot. The first arc extinguishing system includes an arc extinguishing cover and a plurality of first arc extinguishing plates disposed inside the arc extinguishing cover. The second arc extinguishing system includes a plurality of second arc extinguishing plates. An arc extinguishing channel is provided in the second mounting slot, and a positioning slot for installing a plurality of second arc extinguishing plates is provided in the arc extinguishing channel at intervals.

2. A circuit breaker according to claim 1, characterized in that: The arc-extinguishing channel has a raised first dividing ridge, and the second shell cover has a second dividing ridge corresponding to the first dividing ridge.

3. A circuit breaker according to claim 2, characterized in that: The second arc-extinguishing plate has a positioning port at one end, and a limiting port that cooperates with the positioning port is provided in the positioning groove.

4. A circuit breaker according to claim 1, characterized in that: The second arc-extinguishing plate has an arc-shaped opening at the end facing the contact component.

5. A circuit breaker according to claim 4, characterized in that: The inner wall of the second shell cover is provided with a slot that is compatible with the second arc extinguishing plate.

6. A circuit breaker according to claim 5, characterized in that: The inner wall of the second shell cover has positioning blocks located outside the slot on both sides of the second arc extinguishing plate.

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