Safe high-density intelligent circuit breaker

Abstract

The utility model relates to a safety type high-density intelligent circuit breaker, and relates to the technical field of circuit breakers, the safety type high-density intelligent circuit breaker comprises a shell, a wiring terminal and a shell cover, the shell is internally provided with a contact assembly, an operation assembly, an arc extinguishing assembly and an overload protection assembly, the overload protection assembly comprises an iron core, a coil wound around the periphery of the iron core and an armature located at the end of the iron core, one end of the armature is connected with a shifting rod, a rotating rod rotationally connected with the inner wall of the shell is arranged at the joint of the armature and the shifting rod, and the periphery of the rotating rod is sleeved with a torsional spring. A movable block rotationally connected with the inner wall of the shell is arranged on the side face of the armature, a receding notch is formed in the side wall of the shell, and a shifting block is arranged at the end, away from the armature, of the movable block; according to the invention, when the copper bar is in plugging cooperation with the corresponding wiring terminal, the shifting block is shifted in advance, and the movable block is driven to abut against the armature, so that the armature abuts against the iron core, the contact assembly is further disconnected, and the safety performance when the copper bar is plugged with the wiring terminal is improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a safe high-density intelligent circuit breaker. Background Art

[0002] In the power system, the circuit breaker is one of the main devices to ensure safe and stable operation. In the case of short circuit, overload and ground fault, the circuit breaker plays a role in isolating the fault, protecting electrical equipment and maintaining the safety of the power system. According to the different working principles, the circuit breaker can be divided into two types: electromagnetic circuit breaker and thermal magnetic circuit breaker.

[0003] In the related art, the electromagnetic air circuit breaker is usually composed of an electromagnet, a mechanical transmission device, a spring energy storage mechanism and contacts. Its appearance is rectangular or square. Similar to the utility model with publication number CN210722939U, a flat and long high-breaking hydraulic electromagnetic circuit breaker for front-out and rear-in, including a base shell, and a pull ring, a handle, a connecting rod shaft, a pull rod, a snap-on locking mechanism, a tripping mechanism, a moving contact, an arc extinguishing chamber, an incoming terminal, a copper busbar, a static contact, an armature and an outgoing mechanism all installed on the base shell, and the incoming terminal adopts a duckbill terminal. During the application of the circuit breaker, the copper busbar is plugged into the duckbill incoming terminal. In order to ensure safety during this process, it is usually necessary to adjust the circuit breaker to the open state.

[0004] When the circuit breaker is in the closed state, a conductive path has been formed between the incoming terminal and the copper busbar. If the plugging operation is performed at this time, it may cause the duckbill incoming terminal and the copper busbar to separate and re-contact instantly. This rapid action may generate an arc. The high temperature and high energy of the arc may burn the contacts and even cause a fire or explosion. Since the user may plug the duckbill incoming terminal on the circuit breaker into the copper busbar when the circuit breaker is in the closed state, there is a safety hazard when using the circuit breaker. Utility Model Content

[0005] The purpose of the present application is to provide a safe high-density intelligent circuit breaker to solve the problem in the above-mentioned related technology that the user may plug the duckbill type incoming terminal on the circuit breaker into the copper bus when the circuit breaker is in the closed state, resulting in a safety hazard when the circuit breaker is in use.

[0006] The present application provides a safe high-density intelligent circuit breaker adopts the following technical solution:

[0007] A safe high-density intelligent circuit breaker comprises a shell, a wiring terminal fixed on the shell and a shell cover, wherein a contact assembly, an operating assembly for manually controlling the contact assembly, an arc extinguishing assembly and an overload protection assembly for controlling the disconnection of the contact assembly in case of a fault are installed inside the shell, wherein the overload protection assembly comprises an iron core, a coil wound around the outer periphery of the iron core and an armature located at the end of the iron core, wherein an end of the armature away from the coil is connected with a lever, a rotating rod rotatably connected to an inner wall of the shell is provided at a connection between the armature and the lever, a torsion spring for rotating the armature away from the iron core is sleeved on the outer periphery of the rotating rod; a movable block rotatably connected to the inner wall of the shell is provided on a side of the armature away from the iron core, a clearance notch is provided on the side wall of the shell, and a shifting block penetrating the clearance notch and extending to the outside is provided at the end of the movable block away from the armature; when the shifting block is shifted, the movable block can be driven to press against the armature, so that the armature rotates and contacts the iron core.

[0008] By adopting the above technical solution, due to the matching arrangement of the movable block and the shifting block, when the copper busbar is plugged and matched with the corresponding terminal, the shifting block is pre-moved, and the movable block is driven to press against the armature, so that the armature and the iron core are abutted, and then the contact assembly is disconnected, so that the circuit breaker is in an open state, thereby avoiding the situation where the circuit breaker is plugged into the copper busbar when it is in a closed state, and improving the safety performance when the copper busbar is plugged into the terminal.

[0009] Optionally, a guiding slope is provided on the side of the shift block facing the wiring terminal.

[0010] By adopting the above technical solution, due to the setting of the guiding inclined surface on the shifting block, the user can shift the shifting block along the guiding inclined surface when opening the circuit breaker, so as to drive the movable block to press against the armature.

[0011] Optionally, a limiting block is provided on the shifting block, and a limiting groove for the limiting block to be rotatably placed is provided on the inner opening edge of the displacement notch of the shell.

[0012] By adopting the above technical solution, due to the coordinated setting of the limit block and the limit groove, the limit block is normally placed inside the limit groove to limit the rotation angle of the shift block, reduce the part of the shift block extending to the outside of the shell, and thereby reduce the possibility of unintentional people accidentally touching the shift block and causing the shift block to rotate.

[0013] Optionally, a stepped limiting groove which fits with the side wall of the displacement notch is formed on the side of the shifting block away from the limiting block.

[0014] By adopting the above technical solution, due to the opening of the step limit groove, under normal conditions, the side wall of the step limit groove abuts against the side wall of the clearance gap, thereby further limiting the rotation angle of the shift block.

[0015] Optionally, the cross-sectional width of the movable block increases gradually in a direction approaching the shift block.

[0016] By adopting the above technical solution, due to the size setting of the movable block, the overall volume of the movable block is reduced, thereby improving the space utilization rate inside the shell.

[0017] Optionally, the side of the movable block away from the shifting block is rounded.

[0018] By adopting the above technical solution, when the movable block rotates and presses against the armature, the rounded corners are provided to reduce the possibility that the edge of the movable block may scratch the surface of the armature.

[0019] Optionally, a plurality of tooth grooves for limiting the hook position of the end of the torsion spring are provided at the connection between the shift rod and the armature.

[0020] By adopting the above technical solution, due to the opening of a plurality of tooth grooves, the hook can be fixed on the tooth grooves at different positions according to needs, so as to adjust the torque of the torsion spring acting on the armature.

[0021] Optionally, the shift rod and the armature are integrally formed.

[0022] By adopting the above technical solution, the assembly and fixation of the shifting rod and the armature are facilitated.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Due to the matching setting of the movable block and the shifting block, when the copper busbar is plugged into the corresponding terminal, the shifting block is moved in advance, and the movable block is driven to press against the armature, so that the armature abuts against the iron core, and then the contact assembly is disconnected, so that the circuit breaker is in the open state, thereby avoiding the situation where the copper busbar is plugged into the circuit breaker when it is in the closed state, and improving the safety performance when the copper busbar is plugged into the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of the structure of the installation and matching of the operating assembly and the contact assembly in the embodiment of the present application;

[0028] Figure 3This is a schematic diagram of the structure of the embodiment of the present application showing the installation and coordination of the armature and the torsion spring;

[0029] Figure 4 It is a partial structural diagram of the installation and matching of the torsion spring in the embodiment of the present application;

[0030] Figure 5 It is a partial structural schematic diagram of an embodiment of the present application showing that the shift block is in a non-pressed state;

[0031] Figure 6 It is a schematic diagram of the local structure of the embodiment of the present application showing that the shift block is in a pressed state.

[0032] In the figure, 1, shell; 11, terminal; 12, clearance notch; 121, limit groove; 2, shell cover; 3, contact assembly; 4, operating assembly; 5, arc extinguishing assembly; 6, overload protection assembly; 61, iron core; 62, coil; 63, armature; 631, lever; 632, rotating rod; 633, tooth groove; 64, torsion spring; 641, hook; 7, movable block; 71, lever block; 711, guide slope; 712, step limit groove; 72, limit block. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] Example:

[0035] Reference Figure 1 and Figure 2 A safe high-density intelligent circuit breaker comprises a housing 1, a terminal 11 fixed in the housing 1 and a housing cover 2 mounted on the housing 1, wherein the terminal 11 is a duckbill type and is used for plugging and mating with a copper busbar; wherein a contact assembly 3, an operating assembly 4 for manually controlling the contact assembly 3, an arc extinguishing assembly 5 and an overload protection assembly 6 for controlling the disconnection of the contact assembly 3 in case of a fault are installed inside the housing 1;

[0036] The contact assembly 3 includes a moving contact piece and a stationary contact piece, the operating assembly 4 includes a connecting rod and a button for driving the moving contact piece to rotate close to the stationary contact piece, and the arc extinguishing assembly 5 includes an arc extinguishing grid located outside the moving contact piece and the stationary contact piece. This is a conventional structure, and the contact assembly 3, the operating assembly 4 and the arc extinguishing assembly are not repeated here.

[0037] Reference Figure 3 and Figure 4The overload protection assembly 6 includes an iron core 61, a coil 62 wound around the outer periphery of the iron core 61, and an armature 63 located at the end of the iron core 61. The end of the armature 63 away from the coil 62 is connected to a lever 631. A rotating rod 632 rotatably connected to the inner wall of the housing 1 is provided at the connection between the armature 63 and the lever 631. A torsion spring 64 for rotating the armature 63 away from the iron core 61 is sleeved on the outer periphery of the rotating rod 632;

[0038] When an overload or short circuit occurs in the circuit, the current in the coil 62 increases rapidly, generating a strong magnetic attraction. This attraction is sufficient to overcome the tension of the torsion spring 64 or other braking force, causing the armature 63 to quickly engage with the iron core 61, while the lever 631 rotates and causes the contact assembly 3 (see Figure 2 ) is disconnected; and then under the action of the torsion spring 64, the armature 63 is reset.

[0039] Reference Figure 3 and Figure 4 The lever 631 and the armature 63 are integrally formed, so as to facilitate the assembly and fixation of the lever 631 and the armature 63; a plurality of tooth grooves 633 for limiting the hook 641 at one end of the torsion spring 64 are evenly provided at the connection between the lever 631 and the armature 63, and the hook 641 at the other end of the torsion spring 64 is fixedly connected to the inner wall of the housing 1, and the hook 641 can be fixed on the tooth grooves 633 at different positions according to needs, so as to adjust the torque of the torsion spring 64 acting on the armature 63.

[0040] Reference Figure 5 , a movable block 7 is provided on the side of the armature 63 away from the iron core 61 and is rotatably connected to the inner wall of the housing 1, and a clearance notch 12 is provided on the side wall of the housing 1, and a shifting block 71 is provided at the end of the movable block 7 away from the armature 63 and passes through the clearance notch 12 and extends to the outside; when the copper bar is connected to the corresponding terminal 11 (see Figure 2 ) When plugging and mating, the shifting block 71 is pre-moved, and the movable block 7 is driven to press against the armature 63, so that the armature 63 abuts against the iron core 61, thereby making the contact assembly 3 (see Figure 2 ) to ensure that the copper bar is disconnected from the terminal 11 (see Figure 2 ) Safety performance during plugging.

[0041] Reference Figure 5 and Figure 6 , the block 71 is directed toward the terminal 11 (see Figure 2) is provided with a guide slope 711 on the side surface, and the user can move the shift block 71 along the guide slope 711 to facilitate driving the movable block 7 to press against the armature 63. A limit block 72 is fixedly provided on the shift block 71, and a limit groove 121 for the limit block 72 to be rotated and placed is provided on the inner opening edge of the clearance notch 12 of the housing 1, and a stepped limit groove 712 is provided on the side of the shift block 71 away from the limit block 72 to fit the side wall of the clearance notch 12. Due to the coordinated arrangement of the limit block 72 and the stepped limit groove 712, the rotation angle of the shift block 71 is limited, and the portion of the shift block 71 extending to the outside of the housing 1 is reduced, thereby reducing the possibility of an unauthorized person accidentally touching the shift block 71 and driving the shift block 71 to rotate.

[0042] Reference Figure 6 The cross-sectional width of the movable block 7 increases gradually in the direction approaching the shift block 71, thereby reducing the overall volume of the movable block 7 and improving the space utilization rate inside the housing 1; the side of the movable block 7 away from the shift block 71 is rounded, and when the movable block 7 rotates and presses against the armature 63, the possibility of the edge of the movable block 7 scratching the surface of the armature 63 is reduced.

[0043] The implementation principle of the embodiment of the present application is:

[0044] Due to the matching arrangement of the movable block 7 and the shift block 71, when the copper busbar is plugged into the corresponding terminal 11, the shift block 71 is pre-moved, and the movable block 7 is driven to press against the armature 63, so that the armature 63 abuts against the iron core 61, and then the contact assembly 3 is disconnected, thereby ensuring the safety performance when the copper busbar is plugged into the terminal 11.

[0045] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safe high-density intelligent circuit breaker, comprising a housing (1), a terminal (11) fixed on the housing (1) and a housing cover (2); a contact assembly (3), an operating assembly (4) for manually controlling the contact assembly (3), an arc extinguishing assembly (5) and an overload protection assembly (6) for controlling the contact assembly (3) to be disconnected when a fault occurs are installed inside the housing (1); the overload protection assembly (6) comprises an iron core (61), a coil (62) wound around the outer periphery of the iron core (61) and an armature (63) located at an end of the iron core (61); an end of the armature (63) away from the coil (62) is connected to a lever (631); a rotating rod (632) rotatably connected to the inner wall of the housing (1) is provided at the connection between the armature (63) and the lever (631); a torsion spring (64) for rotating the armature (63) in a direction away from the iron core (61) is sleeved on the outer periphery of the rotating rod (632); It is characterized in that A movable block (7) rotatably connected to the inner wall of the shell (1) is provided on the side of the armature (63) away from the iron core (61); a clearance notch (12) is provided on the side wall of the shell (1); and a shifting block (71) is provided at the end of the movable block (7) away from the armature (63) and passes through the clearance notch (12) and extends to the outside; when the shifting block (71) is shifted, it can drive the movable block (7) to press against the armature (63), so that the armature (63) rotates and contacts the iron core (61).

2. A safe high-density intelligent circuit breaker according to claim 1, characterized in that: A guiding inclined surface (711) is provided on the side of the shifting block (71) facing the connecting terminal (11).

3. A safe high-density intelligent circuit breaker according to claim 1, characterized in that: The shifting block (71) is provided with a limiting block (72), and the housing (1) is provided with a limiting recess (121) at the inner opening edge of the clearance notch (12) for the limiting block (72) to be rotatably placed therein.

4. A safe high-density intelligent circuit breaker according to claim 3, characterized in that: A stepped limiting groove (712) is provided on the side of the shifting block (71) away from the limiting block (72) and is fitted with the side wall of the clearance notch (12).

5. A safe high-density intelligent circuit breaker according to claim 1, characterized in that: The cross-sectional width of the movable block (7) increases gradually in a direction approaching the shifting block (71).

6. A safe high-density intelligent circuit breaker according to claim 5, characterized in that: The side surface of the movable block (7) away from the shifting block (71) is rounded.

7. A safe high-density intelligent circuit breaker according to claim 1, characterized in that: A plurality of tooth grooves (633) for limiting the position of the hook (641) at the end of the torsion spring (64) are provided at the connection between the shifting rod (631) and the armature (63).

8. A safe high-density intelligent circuit breaker according to claim 1, characterized in that: The shifting rod (631) and the armature (63) are integrally formed.

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