Modularized assembled direct-current frame circuit breaker

Abstract

The utility model discloses a modularized assembled DC frame circuit breaker, comprising a left side plate and a right side plate, the front ends of the left side plate and the right side plate are connected with a mask, the rear ends of the left side plate and the right side plate are connected with a protective cover plate, and a housing is connected right above the left side plate and the right side plate. A mounting cavity is formed among a mask, a protective cover plate, a left side plate and a right side plate, an operation cavity is formed in the mask and communicates with the mounting cavity, and a plurality of opening and closing units are mounted in the mounting cavity. According to the utility model, direct current arc extinguishing and breaking are realized through the multi-pole frame circuit breaker, a modularized assembly structure is designed, the cost of the whole mold of the frame circuit breaker is reduced, the realization of multi-pole assembly is facilitated, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of frame circuit breakers, in particular to a modular assembled DC frame circuit breaker. Background Art

[0002] A frame circuit breaker is a mechanical switching device that can connect, carry, and break the current under normal circuit conditions, and can also connect, carry for a certain time, and break the current under specified abnormal circuit conditions. It is an important power equipment in the power grid.

[0003] However, the existing DC frame circuit breakers on the market are all multi-pole (switching unit) in series, using multi-pole series connection to achieve arc extinguishing and improve the performance of breaking capacity. This method can effectively solve the function of arc extinguishing and improve the performance of breaking capacity, but this method will increase the production cost and lead to an increase in the usage cost of users. Summary of the Invention

[0004] The purpose of the utility model is to provide a modular assembled DC frame circuit breaker to solve the problem that the existing DC frame circuit breakers on the market are all multi-pole in series, using multi-pole series connection to achieve arc extinguishing and improve the performance of breaking capacity. This method can effectively solve the function of arc extinguishing and improve the performance of breaking capacity, but this method will increase the production cost and lead to an increase in the usage cost of users.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A modular assembled DC frame circuit breaker includes a left side plate and a right side plate. A face mask is connected to the front ends of the left side plate and the right side plate. A protective cover plate is connected to the rear ends of the left side plate and the right side plate. A housing is connected above the left side plate and the right side plate. An installation cavity is formed among the face mask, the protective cover plate, the left side plate and the right side plate. An operation cavity is opened in the face mask, and the operation cavity is communicated with the installation cavity. A plurality of switching units are installed in the installation cavity. It is characterized in that: An arc extinguishing chamber is arranged above the installation cavity. The switching unit includes a moving contact system, an electromagnetic tripping device, an operating mechanism and a static contact assembly. The moving contact system is arranged directly below the arc extinguishing chamber in the installation cavity. The static contact assembly is arranged on the inner wall surface of the protective cover plate between the moving contact system and the arc extinguishing chamber. The operating mechanism is arranged in the operation cavity. The electromagnetic tripping device is arranged below the moving contact system in the installation cavity, and one end of the electromagnetic tripping device is connected to the operating mechanism through a tripping transmission rod. The other end of the electromagnetic tripping device is connected to the inner wall surface of the protective cover plate. The moving contact system is rotated through the operating mechanism to contact the surface of the static contact assembly.

[0006] Preferably, the arc extinguishing chamber includes an insulating member, an arc extinguishing cover, and arc extinguishing grid plates. The top of the insulating member is fixedly connected to the arc extinguishing cover through a fastener. A plurality of grid plate clamping grooves are formed on the surface of the insulating member, and the arc extinguishing grid plates are fixedly connected to the inside of the insulating member through the grid plate clamping grooves.

[0007] Preferably, the grid plate clamping grooves are distributed in a disordered structure, and the adjacent arc extinguishing grid plates among the plurality of arc extinguishing grid plates are not designed at the same horizontal height.

[0008] Preferably, the electromagnetic tripping device includes a bracket, a moving contact busbar, a yoke, and an armature. The armature is movably connected inside the bracket. A moving contact busbar is fixedly installed between the bracket and the armature, and a yoke is fixedly installed between the moving contact busbar and the bracket.

[0009] Preferably, one end of the moving contact busbar is fixedly connected to the protective cover plate and extends to the outer wall surface of the protective cover plate. An arc isolation plate is fixedly installed on the outer wall of the protective cover plate. The other end of the moving contact busbar is connected to the moving contact system through a wire, and an electronic current transformer is sleeved on the outer wall surface of the moving contact busbar.

[0010] Preferably, a tripping pull plate is arranged on one side of the outer wall of the operating mechanism, and one end of the tripping pull plate extends backward to the rear end of the operating mechanism and is movably connected to one end of the tripping transmission rod to achieve the tripping function.

[0011] Preferably, the moving contact system includes a moving contact assembly, a rotating frame, and a contact support plate. The moving contact assembly is fixedly installed inside the rotating frame. The contact support plate is fixedly connected above the moving contact assembly through a spring. The front end of the moving contact assembly is movably connected to the static contact assembly through the rotating frame.

[0012] Preferably, a rotating column is arranged on one side of the outer wall of the tripping transmission rod, and the rotating column is fixedly connected to the surface of one of the left side plate and the right side plate.

[0013] Preferably, a smart controller display screen, an operating handle, an I button, and an O button are fixedly installed on the outer wall surface of the face mask, and the smart controller display screen, the operating handle, the I button, and the O button are connected to the operating mechanism.

[0014] Preferably, the static contact assembly includes a static contact and a static contact busbar. One end of the static contact busbar is fixedly installed with the static contact, and the static contact is in contact with the moving contact assembly. The other end of the static contact busbar is fixedly connected to the protective cover plate and extends to the outer wall surface of the protective cover plate, and the static contact busbar and the moving contact busbar are designed at the same horizontal position.

[0015] Beneficial effects

[0016] Compared with the existing technologies, the beneficial effects of the present utility model are as follows:

[0017] The present utility model realizes DC arc extinguishing and breaking through a multi-pole frame circuit breaker, and is designed into a modular assembled structure, which not only reduces the cost of the overall mold of the frame circuit breaker, but also facilitates the realization of assembling multiple poles, and has better practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall front-end structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the overall rear-end structure of the present utility model;

[0020] Figure 3 is a schematic diagram of the internal partial structure of the present utility model;

[0021] Figure 4 is a schematic diagram of the sectional structure of the present utility model;

[0022] Figure 5 is a schematic diagram of the arc extinguishing chamber structure of the present utility model;

[0023] Figure 6 is a schematic diagram of the mating structure of the moving contact system and the static contact assembly of the present utility model;

[0024] Figure 7 is a schematic diagram of the mating structure of the operating mechanism and the tripping device of the present utility model.

[0025] 1. Right side plate; 2. Left side plate; 3. Housing; 4. Face mask; 5. Protective cover plate; 6. Installation cavity; 7. Operating cavity; 8. Opening and closing unit; 41. Intelligent controller display screen; 42. Operating handle; 43. O button; 44. I button;

[0026] 51. Arc separating plate; 61. Arc extinguishing chamber; 62. Moving contact system; 63. Electromagnetic tripping device;

[0027] 64. Static contact assembly; 65. Tripping transmission rod; 66. Electronic current transformer; 71. Operating mechanism;

[0028] 72. Tripping pull plate; 611. Insulating part; 612. Arc extinguishing cover; 613. Grid piece clamping groove; 614. Arc extinguishing grid piece;

[0029] 621. Rotating frame; 622. Moving contact assembly; 623. Contact support plate; 631. Bracket; 632. Armature;

[0030] 633. Moving contact bus bar; 634. Yoke iron; 641. Static contact bus bar; 642. Static contact;

[0031] 651. Rotating column. Detailed implementation mode

[0032] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] As Figure 1-7 It is a schematic structural diagram of a modular assembled DC frame circuit breaker in a preferred embodiment of the present utility model. In this embodiment, a modular assembled DC frame circuit breaker includes a left side plate 2 and a right side plate 1. A face mask 4 is connected to the front ends of the left side plate 2 and the right side plate 1, and a protective cover plate 5 is connected to the rear ends of the left side plate 2 and the right side plate 1. A housing 3 is connected above the left side plate 2 and the right side plate 1. An installation cavity 6 is formed between the face mask 4, the protective cover plate 5, the left side plate 2, and the right side plate 1. An operation cavity 7 is opened in the face mask 4, and the operation cavity 7 communicates with the installation cavity 6. By installing multiple sets of opening and closing units 8 in the installation cavity 6, DC arc extinguishing and breaking are realized. Designed as a modular assembled structure, it not only reduces the overall mold cost of the frame circuit breaker but also facilitates the realization of multi-pole assembly, with better practicability. An arc extinguishing chamber 61 is provided above the installation cavity 6, and the opening and closing unit 8 includes a moving contact system 62, an electromagnetic tripping device 63, an operating mechanism 71, and a static contact assembly 64. The moving contact system 62 is arranged directly below the arc extinguishing chamber 61 in the installation cavity 6. The static contact assembly 64 is installed on the inner wall surface of the protective cover plate 5 between the moving contact system 62 and the arc extinguishing chamber 61. The operating mechanism 71 is arranged in the operation cavity 7. The electromagnetic tripping device 63 is arranged below the moving contact system 62 in the installation cavity 6, and one end of the electromagnetic tripping device 63 is connected to the operating mechanism 71 through a tripping transmission rod 65, and the other end of the electromagnetic tripping device 63 is connected to the inner wall surface of the protective cover plate 5. The moving contact system 62 is rotated through the operating mechanism 71 to contact the surface of the static contact assembly 64.

[0035] In this embodiment, the arc extinguishing chamber 61 includes an insulating member 611, an arc extinguishing cover 612, and arc extinguishing grid plates 614. The top of the insulating member 611 is fixedly connected to the arc extinguishing cover 612 by fasteners. A plurality of exhaust holes for discharging the gas generated by the arc are provided on the surface of the arc extinguishing cover 612. A number of grid plate clamping grooves 613 are provided on the surface of the insulating member 611, and the arc extinguishing grid plates 614 are fixedly connected within the insulating member 611 through the grid plate clamping grooves 613. Specifically, the arc extinguishing grid plates 614 are clamped within the grid plate clamping grooves 613 by their own protrusions. After the protrusions are inserted into the mating grid plate clamping grooves 613, the protrusions of the arc extinguishing grid plates 614 are riveted to enable the protrusions to be stably connected to the surface of the insulating member 611.

[0036] In this embodiment, the grid plate clamping grooves 613 are distributed in a disordered structure. Among the several arc extinguishing grid plates 614, the adjacent arc extinguishing grid plates 614 are not designed at the same horizontal height. This structural design can play a role in dividing the arc.

[0037] In this embodiment, the electromagnetic tripping device 63 includes a bracket 631, a moving contact busbar 633, a yoke 634, and an armature 632. The armature 632 is movably connected within the bracket 631. A moving contact busbar 633 is fixedly installed between the bracket 631 and the armature 632. A yoke 634 is fixedly installed between the moving contact busbar 633 and the bracket 631. With this structural design, the moving contact busbar 633 conducts electricity and cooperates with the yoke 634 to adsorb the armature 632, enabling the armature 632 to move horizontally within the bracket 631. The horizontal movement of the armature 632 drives the tripping transmission rod 65 to rotate and cooperate with the tripping pull plate 72, thereby realizing the tripping function.

[0038] In this embodiment, one end of the moving contact busbar 633 is fixedly connected to the protective cover plate 5 and extends to the outer wall surface of the protective cover plate 5. The purpose of this structural design is for the function of connecting with the wire. An arc isolating plate 51 is fixedly installed on the outer wall of the protective cover plate 5 to prevent the phenomenon of mutual attraction when the moving contact busbars 633 in multiple opening and closing units 8 are conducting electricity, which may affect the use of the circuit breaker. The other end of the moving contact busbar 633 is connected to the moving contact system 62 through a wire. An electronic current transformer 66 is sleeved on the outer wall surface of the moving contact busbar 633, aiming to measure the input current and transmit it to the intelligent control circuit board within the intelligent controller display screen 41. After being calculated by the chip within the intelligent controller display screen 41, a signal is sent to the operating mechanism 71 to cause its tripping action.

[0039] In this embodiment, a tripping pull plate 72 is provided on one side of the outer wall of the operating mechanism 71, and one end of the tripping pull plate 72 extends backward to the rear end of the operating mechanism 71 and is movably connected to one end of the tripping transmission rod 65 to realize the tripping function.

[0040] In this embodiment, the moving contact system 62 includes a moving contact assembly 622, a rotating frame 621, and a contact support plate 623. The moving contact assembly 622 is fixedly installed inside the rotating frame 621. The contact support plate 623 is fixedly connected above the moving contact assembly 622 by a spring. The front end of the moving contact assembly 622 is movably connected to the static contact assembly 64 through the rotating frame 621.

[0041] In this embodiment, a rotating column 651 is provided on one side of the outer wall of the trip transmission rod 65. The rotating column 651 is fixedly connected to the surface of one of the side plates of the left side plate 2 and the right side plate 1. Using one of the side plates of the left side plate 2 and the right side plate 1 as a support through the rotating column 651, the trip transmission rod 65 is assisted to rotate.

[0042] In this embodiment, an intelligent controller display screen 41, an operation handle 42, an I button 44, and an O button 43 are fixedly installed on the outer wall surface of the face mask 4, and the intelligent controller display screen 41, the operation handle 42, the I button 44, and the O button 43 are connected to the operating mechanism 71.

[0043] In this embodiment, the static contact assembly 64 includes a static contact 642 and a static contact bus bar 641. A static contact 642 is fixedly installed at one end of the static contact bus bar 641. The static contact 642 is in contact with the moving contact assembly 622. The other end of the static contact bus bar 641 is fixedly connected to the protective cover plate 5 and extends to the outer wall surface of the protective cover plate 5. The static contact bus bar 641 and the moving contact bus bar 633 are designed to be in the same horizontal position.

[0044] The above content further describes the present invention in detail in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A modular assembled DC frame circuit breaker, comprising a left side plate (2) and a right side plate (1). A face mask (4) is connected to the front ends of the left side plate (2) and the right side plate (1). A protective cover plate (5) is connected to the rear ends of the left side plate (2) and the right side plate (1). A housing (3) is connected above the left side plate (2) and the right side plate (1). An installation cavity (6) is formed among the face mask (4), the protective cover plate (5), the left side plate (2) and the right side plate (1). An operation cavity (7) is formed in the face mask (4), and the operation cavity (7) communicates with the installation cavity (6). A plurality of opening and closing units (8) are installed in the installation cavity (6), and it is characterized in that: Above the installation cavity (6), an arc extinguishing chamber (61) is provided. The opening and closing unit (8) includes a moving contact system (62), an electromagnetic tripping device (63), an operating mechanism (71), and a static contact assembly (64). Inside the installation cavity (6), directly below the arc extinguishing chamber (61), a moving contact system (62) is provided. On the inner wall surface of the protective cover plate (5), between the moving contact system (62) and the arc extinguishing chamber (61), a static contact assembly (64) is provided. Inside the operating cavity (7), an operating mechanism (71) is provided. Inside the installation cavity (6), below the moving contact system (62), an electromagnetic tripping device (63) is provided, and one end of the electromagnetic tripping device (63) is connected to the operating mechanism (71) through a tripping transmission rod (65). The other end of the electromagnetic tripping device (63) is connected to the inner wall surface of the protective cover plate (5). The moving contact system (62) rotates through the operating mechanism (71) to contact the surface of the static contact assembly (64).

2. The modular assembled DC frame circuit breaker according to claim 1, wherein: The arc extinguishing chamber (61) includes an insulating part (611), an arc extinguishing cover (612), and arc extinguishing grid plates (614). The top of the insulating part (611) is fixedly connected to the arc extinguishing cover (612) through fasteners. On the surface of the insulating part (611), a plurality of grid plate clamping grooves (613) are formed. The arc extinguishing grid plates (614) are fixedly connected to the inside of the insulating part (611) through the grid plate clamping grooves (613).

3. The modular assembled DC frame circuit breaker according to claim 2, wherein: The grid plate clamping grooves (613) are distributed in a disordered structure. For several arc extinguishing grid plates (614), the adjacent arc extinguishing grid plates (614) are not designed at the same horizontal height.

4. The modular assembled DC frame circuit breaker according to claim 1, characterized in that: The electromagnetic tripping device (63) includes a bracket (631), a moving contact busbar (633), a yoke iron (634), and an armature (632). The armature (632) is movably connected inside the bracket (631). Between the bracket (631) and the armature (632), a moving contact busbar (633) is fixedly installed. Between the moving contact busbar (633) and the bracket (631), a yoke iron (634) is fixedly installed.

5. The modular assembled DC frame circuit breaker according to claim 4, characterized in that: One end of the moving contact busbar (633) is fixedly connected to the protective cover plate (5) and extends to the outer wall surface of the protective cover plate (5). On the outer wall of the protective cover plate (5), an arc isolation plate (51) is fixedly installed. The other end of the moving contact busbar (633) is connected to the moving contact system (62) through a wire. An electronic current transformer (66) is sleeved on the outer wall surface of the moving contact busbar (633).

6. The modular assembled DC frame circuit breaker according to claim 1, characterized in that: On one side of the outer wall of the operating mechanism (71), a tripping pull plate (72) is provided, and one end of the tripping pull plate (72) extends backward to the rear end of the operating mechanism (71) and is movably connected to one end of the tripping transmission rod (65) to achieve the tripping function.

7. The modular assembled DC frame circuit breaker according to claim 5, characterized in that: The moving contact system (62) includes a moving contact assembly (622), a rotating frame (621), and a contact support plate (623). The moving contact assembly (622) is fixedly installed inside the rotating frame (621). Above the moving contact assembly (622), there is a contact support plate (623) fixedly connected by a spring. The front end of the moving contact assembly (622) is movably connected to the static contact assembly (64) through the rotating frame (621).

8. The modular assembled DC frame circuit breaker according to claim 6, characterized in that: On one side of the outer wall of the trip transmission rod (65), there is a rotating column (651), and the rotating column (651) is fixedly connected to the surface of one of the side plates of the left side plate (2) and the right side plate (1).

9. The modular assembled DC frame circuit breaker according to claim 1, characterized in that: On the outer wall surface of the face mask (4), there are fixedly installed an intelligent controller display screen (41), an operating handle (42), an I button (44), and an O button (43), and the intelligent controller display screen (41), the operating handle (42), the I button (44), and the O button (43) are connected to the operating mechanism (71).

10. The modular assembled DC frame circuit breaker according to claim 7, wherein: The static contact assembly (64) includes a static contact (642) and a static contact bus bar (641). At one end of the static contact bus bar (641), there is a static contact (642) fixedly installed, and the static contact (642) is in contact with the moving contact assembly (622). At the other end of the static contact bus bar (641), it is fixedly connected to the protective cover plate (5) and extends to the outer wall surface of the protective cover plate (5), and the static contact bus bar (641) and the moving contact bus bar (633) are designed to be in the same horizontal position.

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