A small intelligent circuit breaker

Abstract

The utility model discloses a small -size intelligent circuit breaker, protector includes casing and cover, the operating lever on the protector is equipped with the linkage rod and extends into the controller, and the installation cavity includes left side wiring assembly and right side wiring assembly, closes the brake assembly, arc extinguishing chamber and electromagnetic release, and the movable contact and static contact of closing brake assembly are equipped with arc -guiding structure between arc extinguishing chamber, and arc -guiding structure includes arc -guiding piece and arc -guiding piece, and the middle part of opposite side of arc -guiding piece and arc -guiding piece is equipped with, and the arc -guiding convex line of extending in arc extinguishing chamber along both, and arc extinguishing chamber is equipped with arc -extinguishing grid and grid support, and the front and back staggered setting of two arc -extinguishing grids between adjacent is set up, the utility model provides small -size circuit breaker through the improvement arc -guiding structure makes arc move stablely, and arc extinguishing evenly reduces the high temperature of arc concentrated generation, through optimizing wiring assembly, improves the stability of wiring and reduces the connection hidden danger of wiring place, promotes the service life and use safety of circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a small intelligent circuit breaker. Background Technology

[0002] Miniature circuit breakers are characterized by advanced structure, reliable performance, strong breaking capacity, and compact and aesthetically pleasing appearance. They are used for overload and short-circuit protection of lighting, power distribution lines and equipment in office buildings, residences and similar buildings. They can also be used for infrequent switching and connection of lines. They are mainly used in various places such as industrial, commercial, high-rise and residential buildings. In the further design of miniature circuit breakers, intelligent circuit breakers are usually equipped with a drive device. This drive device is connected to the circuit breaker's opening and closing mechanism to drive the opening and closing of the circuit. In addition, common internal components of circuit breakers still need to be optimized. Utility Model Content

[0003] In view of the existing technology, the purpose of this utility model is to provide a structural solution for a small intelligent circuit breaker that is simple in structure and has good reliability.

[0004] The technical solution adopted by this utility model is as follows: a small intelligent circuit breaker, including a protector, the protector including a housing and a cover, the housing having a controller integrally formed thereon, and the operating rod on the protector having a linkage rod extending into the controller;

[0005] The mounting cavity consists of a shell and a cover, and includes a left wiring assembly, a right wiring assembly, a closing and opening assembly, an arc extinguishing chamber, and an electromagnetic trip unit.

[0006] An arc-guiding structure is provided between the moving contact and the stationary contact of the closing and opening circuit breaker assembly and the arc-extinguishing chamber. The arc-guiding structure includes an arc-guiding plate and an arc-inducing plate. The middle of the opposite sides of the arc-guiding plate and the arc-inducing plate is provided with an arc-guiding convex line extending into the arc-extinguishing chamber along both of them.

[0007] The arc-extinguishing chamber is equipped with arc-extinguishing grid plates and grid plate supports, with adjacent arc-extinguishing grid plates being staggered front to back.

[0008] As a further feature of the above scheme, the electromagnetic trip device includes a magnetic yoke and a coil. The magnetic yoke also contains an iron core and a push rod. The coil uses electromagnetic force to drive the iron core to move, which in turn pushes the closing and opening assembly to perform emergency opening.

[0009] As a further feature of the above solution, the left-side wiring assembly includes a fixed conductive plate, a wire clamping bolt, and a wire compartment. The wire clamping bolt is axially fixedly connected to the fixed conductive plate, and the wire compartment is provided with a screw plate that is threadedly engaged with the wire clamping bolt.

[0010] As a further feature of the above solution, the cable compartment is also provided with a V-shaped groove and a cable baffle extending from the lower end of the cable compartment. The V-shaped groove is located at the bottom of the cable compartment and cooperates with the lower end face of the fixed conductive plate to clamp the cable. The cable baffle is used to block the cable groove on the housing when the cable compartment is driven to rise by the pressure bolt.

[0011] As a further feature of the above scheme, the protector is provided with an indicator with a two-color indicator surface. The indicator is hinged to a rotating column on the housing and is provided with a reset torsion spring. The housing is also provided with a viewing window opposite the two-color indicator surface. The closing and opening assembly is provided with a mounting plate. The mounting plate pushes the indicator to rotate along the rotating column during rotation.

[0012] As a further feature of the above solution, the bottom of the protector is also provided with a mounting clip, which includes a fixed hook and a telescopic plate on the protector. The protector is also provided with a receiving slot for installing the telescopic plate. The receiving slot is provided with a light locking slot and a retaining slot. The telescopic plate is provided with an elastic hook and an insert plate.

[0013] Beneficial effects: This utility model provides a miniature circuit breaker with a simple structure, high reliability, and low assembly process requirements. By optimizing the internal components, the service life and stability of the circuit breaker are improved. This includes improving the arc guiding structure to stabilize the movement of the arc towards the arc extinguishing chamber during the arc extinguishing process, ensuring uniform arc slicing of the arc extinguishing grid to reduce the high temperature generated by the concentrated arc, and improving the stability of the wiring and reducing potential connection hazards at the wiring points by optimizing the wiring components, thereby improving the service life and safety of the circuit breaker. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the circuit breaker structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal components of the circuit breaker in this embodiment.

[0016] Figure 3 This is a schematic diagram of the electromagnetic trip unit structure in this embodiment.

[0017] Figure 4 This is a schematic diagram of the arc-extinguishing grid structure in this embodiment.

[0018] Figure 5 This is a schematic diagram of the wiring assembly structure in this embodiment.

[0019] Figure 6 This is a schematic diagram of the installation structure in this embodiment.

[0020] Reference numerals: 1. Protector; 11. Housing; 12. Cover; 13. Mounting cavity; 14. Two-color indicator surface; 15. Rotary column; 16. Indicator; 17. Viewing window; 18. Cable tray; 2. Controller; 3. Operating lever; 31. Linkage lever; 40. Left wiring assembly; 41. Right wiring assembly; 411. Fixed conductor plate; 412. Wire clamping bolt; 413. V-groove; 414. Cable compartment; 415. Screw plate; 416. Wire stop plate; 417. Lower end face; 42. Closing / opening assembly; 42 1. Moving contact; 422. Stationary contact; 427. Step plate; 43. Arc extinguishing chamber; 431. Arc extinguishing grid; 432. Grid support; 44. Electromagnetic trip unit; 441. Magnetic yoke; 442. Coil; 443. Iron core; 444. Push rod; 45. Arc guiding structure; 451. Arc guiding plate; 452. Arc ignition plate; 453. Arc guiding convex wire; 7. Mounting clip; 71. Fixed hook; 72. Telescopic plate; 721. Elastic hook; 722. Insert plate; 731. Light locking groove; 732. Retaining groove. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0022] like Figure 1-6 The present invention provides a small intelligent circuit breaker, including a protector 1. The protector 1 includes a housing 11 and a cover 12. The housing 11 is integrally formed with a controller 2. The operating rod 3 on the protector 1 is provided with a linkage rod 31 that extends into the controller 2.

[0023] The mounting cavity 13 is composed of a housing 11 and a cover 12. The mounting cavity 13 includes a left wiring assembly 40 and a right wiring assembly 41, a closing and opening assembly 42, an arc extinguishing chamber 43, and an electromagnetic trip unit 44.

[0024] An arc-guiding structure 45 is provided between the moving contact 421 and the stationary contact 422 of the closing and opening assembly 42 and the arc-extinguishing chamber 43. The arc-guiding structure 45 includes an arc-guiding plate 451 and an arc-inducing plate 452. The middle of the opposite sides of the arc-guiding plate 451 and the arc-inducing plate 452 is provided with an arc-guiding convex line 453 extending along both into the arc-extinguishing chamber.

[0025] The arc-extinguishing chamber 43 is provided with an arc-extinguishing grid plate 431 and a grid plate support 432, and two adjacent arc-extinguishing grid plates 431 are staggered front and back.

[0026] As a further provision of the above scheme, the electromagnetic trip unit 44 includes a magnetic yoke 441 and a coil 442. The magnetic yoke 441 is also provided with an iron core 443 and a push rod 444. The coil 442 drives the iron core 443 to move by electromagnetic force, which in turn pushes the closing and opening assembly 42 to perform emergency opening.

[0027] As a further feature of the above solution, the left wiring assembly 40 includes a fixed conductive plate 411, a wire clamping bolt 412, and a wire compartment 414. The wire clamping bolt 412 is axially fixedly connected to the fixed conductive plate 411, and the wire compartment 414 is provided with a screw plate 415 that is threadedly engaged with the wire clamping bolt 412.

[0028] As a further provision of the above scheme, the cable compartment 414 is also provided with a V-shaped groove 413 and a cable baffle plate 416 extending from the lower end of the cable compartment 414. The V-shaped groove 413 is located at the bottom of the cable compartment 414 and cooperates with the lower end face 417 of the fixed conductive plate 411 to clamp the cable. The cable baffle plate 416 is used to block the cable groove 18 on the housing 11 when the cable compartment 414 is driven to rise by the pressure bolt 412.

[0029] As a further provision of the above scheme, the protector 1 is provided with an indicator 16 having a dual-color indicator surface 14. The indicator 16 is hinged to a rotating column 15 provided on the housing 11 and is provided with a reset torsion spring. The housing 11 is also provided with a viewing window 17 opposite to the dual-color indicator surface 14. The closing and opening assembly 42 is provided with a mounting plate 427. During rotation, the mounting plate 427 pushes the indicator 16 to rotate along the rotating column 15.

[0030] As a further provision of the above solution, the bottom of the protector 1 is also provided with a mounting clip 7. The mounting clip 7 includes a fixed hook 71 and a telescopic clip 72 provided on the protector 1. The protector 1 is also provided with a receiving slot for installing the telescopic clip 72. The receiving slot is provided with a light locking slot 731 and a retaining slot 732. The telescopic clip 72 is provided with an elastic hook 721 and an insert plate 722.

[0031] The miniature intelligent circuit breaker in this embodiment includes a protector 1, such as... Figure 2 The protector 1 shown includes a housing 11 and a cover 12. A controller 2 is integrally formed on the other side of the housing 11 opposite to the cover 12. One side of the outer shell of the controller 2 is connected to the housing 11, and the opening is sealed by a cover plate structure. The control cavity formed by the two is equipped with a drive unit, a circuit board of an intelligent control unit, etc. The protector 1 is equipped with an operating rod 3 of the closing and opening assembly 42, and also has a linkage rod 31 that extends into the controller 2. The drive device set in the controller 2 for remote control can drive the operating rod 3 to perform the closing and opening operation by swinging the linkage rod 31.

[0032] In this embodiment, a mounting cavity 13 for the main components of a circuit breaker is formed by a housing 11 and a cover 12. The mounting cavity 13 includes a left-side wiring assembly 40 and a right-side wiring assembly 41, a closing / opening assembly 42, an arc-extinguishing chamber 43, and an electromagnetic trip unit 44. The left-side wiring assembly 40 and the right-side wiring assembly 41 are used for connecting external cables. A hinged closing / opening assembly 42 is provided within the mounting cavity 13. An arc-guiding structure 45 is provided at the lower moving contact 421 and stationary contact 422 of the closing / opening assembly 42. An arc-extinguishing chamber 43 with an arc-extinguishing grid plate 431 is provided at the end of the racetrack-shaped arc-guiding structure 45. Further, the arc-guiding structure 45 includes an arc-guiding plate 451 and an arc-inducing plate 452. An arc-guiding convex line 453 extending into the arc-extinguishing chamber 43 is provided on the middle of the opposite sides of the arc-guiding plate 451 and the arc-inducing plate 452. The arc-guiding convex line 453 is as follows: Figure 2 As shown, the arc guide plate 451 and the arc ignition plate 452 are located in the middle and protrude towards each other. After the arc is generated between the driven contact 421 and the stationary contact 422, the arc will move along the arc guide plate 451 and the arc ignition plate 452 toward the arc extinguishing chamber 43. Based on the arrangement of the arc guide convex line 453, the arc will preferentially move on the two arc guide convex lines 453 that are closer together, which makes the arc more concentrated, with less fluctuation and a more stable path.

[0033] Furthermore, such as Figure 4 The arc-extinguishing chamber 43 shown in this embodiment is provided with arc-extinguishing grid plates 431 and grid plate supports 432. The two adjacent arc-extinguishing grid plates 431 are staggered front and back. This arrangement allows the arc to undergo two cuts when it is cut off. The distance is relatively far during the first cut, and the cut line is longer and easier to cut. The overall length of the arc is shorter during the second cut. Through the above-mentioned staggered double-layer arc-extinguishing grid plate 431, the arc-extinguishing effect can be stabilized for the arc-cutting and arc-extinguishing.

[0034] As a further provision of the above scheme, the electromagnetic trip unit 44 includes a magnetic yoke 441 and a coil 442. The magnetic yoke 441 is also provided with an iron core 443 and a push rod 444. The coil 442 drives the iron core 443 to move by electromagnetic force, which in turn pushes the closing and opening assembly 42 to perform emergency opening.

[0035] As a further provision of the above scheme, both the left wiring assembly 40 and the right wiring assembly 41 include a fixed conductive plate 411, a wire clamping bolt 412, and a wire compartment 414. The wire clamping bolt 412 is axially fixedly connected to the fixed conductive plate 411, and the wire compartment 414 is provided with a screw plate 415 that is threadedly engaged with the wire clamping bolt 412. The wire compartment 414 is also provided with a V-groove 413 and a wire stop plate 416 extending from the lower end of the wire compartment 414. The V-groove 413 is positioned... The cable is clamped at the bottom of the cable compartment 414, where it engages with the lower end face 417 of the fixed conductive plate 411. The cable baffle 416 is used to block the cable groove 18 on the housing 11 when the cable compartment 414 is driven to rise by the cable clamping bolt 412. In use, the cable clamping bolt 412 on the left and right wiring assemblies 40 rotates, and the cable clamping bolt 412 is axially fixed relative to the fixed conductive plate 411. During the circumferential rotation relative to the fixed conductive plate 411, the cable is clamped. The cable tray 414, which is threadedly connected to the screw plate 415 and the wire clamping bolt 412, moves relative to the housing 11 because the wire clamping bolt 412 remains axially stationary. This allows the bottom of the V-groove 413 of the cable tray 414 to form a clamping tension control with the lower end face 417 of the fixed conductive plate 411. This enables the clamping of the metal end of the wire extending from the wire groove 18 by rotating the wire clamping bolt 412 from directly above. Furthermore, the cable tray 414 is also equipped with a wire baffle 416. The wire baffle 416 can block the wire groove 18 when the cable tray 414 is raised, preventing the cable from being inserted into the cable tray 414 in an incorrect position, thus avoiding incorrect wire clamping. If the wire baffle 416 is not provided and the cable is clamped at the bottom of the cable tray 414, the circuit will still be conductive to some extent, but it is a case of poor contact and is very likely to cause electrical hazards. Therefore, the wire baffle 416 provided in this embodiment completely avoids the problem of incorrect wire insertion in the cable tray 414.

[0036] As a further provision of the above solution, the protector 1 is provided with an indicator 16 having a dual-color indicator surface 14. The indicator 16 is hinged to a rotating column 15 on the housing 11 and is provided with a return torsion spring. The housing 11 is also provided with a viewing window 17 opposite to the dual-color indicator surface 14. The closing and opening assembly 42 is provided with a step plate 427. During rotation, the step plate 427 pushes the indicator 16 to rotate along the rotating column 15. It is worth noting that, based on the art, the dual-color indicator surface 14 is generally set with red and green. When the step plate 427 is not in contact with the indicator 16 and is not pushing the indicator 16 to rotate, the green side of the dual-color indicator surface 14 faces the viewing window 17. At this time, the torsion spring ensures that the indicator 16 will not give an incorrect indication. During emergency opening, the step plate 427 on the rotating closing and opening assembly 42 pushes the indicator 16 to rotate during the rotation stroke. After rotating a certain angle, the red side of the dual-color indicator surface 14 rotates to the viewing window 17.

[0037] As a further provision of the above solution, the bottom of the protector 1 is also provided with a mounting clip 7. The mounting clip 7 includes a fixed hook 71 and a telescopic clip 72 provided on the protector 1. The protector 1 is also provided with a receiving slot for installing the telescopic clip 72. The receiving slot is provided with a light locking slot 731 and a retaining slot 732. The telescopic clip 72 is provided with an elastic hook 721 and an insert plate 722.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A small-sized intelligent circuit breaker characterized by comprising: include: Protector (1), the protector (1) includes a housing (11) and a cover (12), the housing (11) is integrally formed with a controller (2), and the operating rod (3) on the protector (1) is provided with a linkage rod (31) extending into the controller (2); The mounting cavity (13) is composed of a housing (11) and a cover (12). The mounting cavity (13) includes a left wiring assembly (40) and a right wiring assembly (41), a closing and opening assembly (42), an arc extinguishing chamber (43), and an electromagnetic trip unit (44). An arc-guiding structure (45) is provided between the moving contact (421) and the stationary contact (422) of the closing and opening assembly (42) and the arc-extinguishing chamber (43). The arc-guiding structure (45) includes an arc-guiding plate (451) and an arc-inducing plate (452). The opposite sides of the arc-guiding plate (451) and the arc-inducing plate (452) are provided with an arc-guiding convex line (453). The arc-guiding convex line (453) is located in the middle of the two and extends towards the arc-extinguishing chamber (43). The arc-extinguishing chamber (43) is provided with an arc-extinguishing grid plate (431) and a grid plate support (432), and two adjacent arc-extinguishing grid plates (431) are staggered and aligned.

2. The miniature intelligent circuit breaker of claim 1, wherein: The electromagnetic trip unit (44) includes a magnetic yoke (441) and a coil (442). The magnetic yoke (441) is also provided with an iron core (443) and a push rod (444). The coil (442) drives the iron core (443) to move by electromagnetic force. The iron core (443) carries the push rod (444) to push the closing and opening assembly (42) to perform emergency opening.

3. The miniature intelligent circuit breaker of claim 1, wherein: The left wiring assembly (40) includes a fixed conductive plate (411), a wire clamping bolt (412), and a wire compartment (414). The wire clamping bolt (412) is axially fixedly connected to the fixed conductive plate (411), and the wire compartment (414) is provided with a screw plate (415) that is threadedly engaged with the wire clamping bolt (412).

4. The miniature intelligent circuit breaker according to claim 3, characterized in that: The cable compartment (414) is also provided with a V-shaped groove (413) and a cable baffle (416) extending from the lower end of the cable compartment (414). The V-shaped groove (413) is located at the bottom of the cable compartment (414) and cooperates with the lower end face (417) of the fixed conductive plate (411) to clamp the cable. The cable baffle (416) is used to block the cable groove (18) on the housing (11) when the cable compartment (414) is driven to rise by the pressure bolt (412).

5. A miniature intelligent circuit breaker according to claim 1, characterized in that: The protector (1) is provided with an indicator (16) with a two-color indicator surface (14). The indicator (16) is hinged to a rotating column (15) on the housing (11) and is provided with a reset torsion spring. The housing (11) is also provided with a viewing window (17) opposite to the two-color indicator surface (14). The closing and opening assembly (42) is provided with a step plate (427). The step plate (427) pushes the indicator (16) to rotate along the rotating column (15) during rotation.

6. A miniature intelligent circuit breaker according to claim 1, characterized in that: The bottom of the protector (1) is also provided with a mounting clip (7), which includes a fixed hook (71) and a telescopic clip (72) provided on the protector (1). The protector (1) is also provided with a receiving slot for installing the telescopic clip (72). The receiving slot is provided with a light locking slot (731) and a retaining slot (732). The telescopic clip (72) is provided with an elastic hook (721) and a insert plate (722).

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