Bipolar circuit breaker and distribution box

Abstract

The utility model relates to a bipolar circuit breaker and a distribution box, and the bipolar circuit breaker is small in overall size, convenient in wiring, simple in wiring, and good in interphase insulation through parallel incoming lines, transverse bending, mutual crossing and parallel outgoing lines between a first pole conductive circuit and a second pole conductive circuit, and has complete circuit breaking and arc extinguishing functions.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to an improvement on the routing structure of a conductive line of a double-pole circuit breaker. Background Art

[0002] The existing circuit breakers used in the incoming end of the distribution box are usually two-pole circuit breakers, one pole is connected to the A-phase power line, and the other pole is connected to the B-phase power line. This type of circuit breaker generally adopts an "upper incoming line-lower outgoing line" or "lower incoming line-upper outgoing line" wiring method, and the contact system is vertically arranged between the incoming end and the outgoing end, resulting in a large size of the circuit breaker. In addition, due to the small internal space of the distribution box, the circuit breaker is often unable to be installed.

[0003] Therefore, how to further reduce the size of a bipolar circuit breaker suitable for a distribution box is one of the problems that technical personnel in this field need to solve urgently. Utility Model Content

[0004] In view of the above problems, the utility model proposes a bipolar circuit breaker with optimized structure, and based on the bipolar circuit breaker, also proposes a distribution box with the bipolar circuit breaker.

[0005] The utility model is implemented by the following technical solutions:

[0006] The utility model provides a double-pole circuit breaker, comprising an outer shell, a first-pole conductive circuit and a second-pole conductive circuit, wherein the first-pole conductive circuit and the second-pole conductive circuit both enter from the outside of the outer shell, extend inside the outer shell, and finally exit from the outside of the outer shell;

[0007] The first-pole conductive circuit includes a first incoming terminal block, a first conductive copper bar, a first contact system, a first flexible connection, a first hard connection, and a first outgoing terminal block connected in sequence, and the second-pole conductive circuit includes a second incoming terminal block, a second hard connection, a second flexible connection, a second contact system, a second conductive copper bar, and a second outgoing terminal block connected in sequence;

[0008] The outer shell comprises a first side and a second side that are separated from each other, the first incoming terminal block and the second incoming terminal block are spaced side by side to expose the first side, and the first outgoing terminal block and the second outgoing terminal block are spaced side by side to expose the second side;

[0009] The first incoming terminal block is located on the left side of the second incoming terminal block in the transverse direction, and the first incoming terminal block and the second incoming terminal block are located on the upper side of the outer shell in the longitudinal direction, the first incoming terminal block and the first conductive copper bar are extended downward, the first contact system and the first flexible connection are extended to the right, and the first outgoing terminal block is extended downward; the second incoming terminal block is extended downward, the second flexible connection and the second contact system are extended to the left, and the second conductive copper bar and the second outgoing terminal block are extended downward;

[0010] The first contact system crosses the second conductive copper busbar, so that the first-pole conductive line and the second-pole conductive line cross each other.

[0011] In one embodiment, preferably, a line connecting the first incoming terminal block and the second outgoing terminal block is parallel to a line connecting the second incoming terminal block and the first outgoing terminal block.

[0012] In one embodiment, preferably, the first contact system includes a first stationary contact arranged on the first conductive copper bus and a first moving contact connected to the first flexible connection.

[0013] In one embodiment, preferably, the second contact system includes a second static contact arranged on the second conductive copper busbar and a second moving contact connected to the second flexible connection.

[0014] In one embodiment, preferably, the first contact system and the second contact system have a first disconnecting motion trajectory and a second disconnecting motion trajectory respectively, and the extension direction of the first output terminal block and the second output terminal block is perpendicular to the motion plane where the first disconnecting motion trajectory and the second disconnecting motion trajectory are located.

[0015] In one embodiment, preferably, it further includes a first arc extinguishing chamber and a second arc extinguishing chamber covering the first breaking motion trajectory and the second breaking motion trajectory respectively.

[0016] In one embodiment, preferably, the first hard connection is a bent sheet, and the first soft connection arranged horizontally left and right and the first output terminal seat arranged vertically up and down are connected through its bending structure.

[0017] In one embodiment, preferably, the second hard connection is a bent sheet, and the second incoming terminal block arranged vertically up and down and the second soft connection arranged horizontally left and right are connected through its bending structure.

[0018] In one embodiment, preferably, it further includes a first overcurrent release and a second overcurrent release respectively installed on the first hard connection and the second hard connection.

[0019] Based on the above-mentioned bipolar circuit breaker, the utility model further proposes a distribution box, comprising the above-mentioned bipolar circuit breaker arranged at the incoming line end thereof.

[0020] The utility model has the following beneficial effects: the bipolar circuit breaker provided by the utility model has parallel incoming lines, horizontal bending, mutual crossing, and parallel outgoing lines between the first pole conductive line and the second pole conductive line, so that the circuit breaker has a small overall volume, convenient wiring, simple wiring, good phase-to-phase insulation, and has complete circuit breaking and arc extinguishing functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a double-pole circuit breaker in Example 1 (one of which shows the outer shell in dotted lines);

[0022] Figure 2 is a schematic diagram of a double-pole circuit breaker in Embodiment 1 (second, the outer shell is not shown);

[0023] Figure 3 yes Figure 2 A partial enlarged view of the M in the middle;

[0024] Figure 4 yes Figure 2 A local enlarged view of the N position in the middle;

[0025] Figure 5 It is a schematic diagram of the current flow direction of the double-pole circuit breaker in Example 1 (including A-phase electricity and B-phase electricity). DETAILED DESCRIPTION

[0026] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1:

[0029] See also Figure 1-5 As shown, as a preferred embodiment of the utility model, a double-pole circuit breaker is provided, which is applied to the incoming line end of the distribution box, and its two poles are respectively connected to the A-phase electricity and the B-phase electricity, including an outer shell 30, a first-pole conductive line 10 (connected to the A-phase electricity) and a second-pole conductive line 20 (connected to the B-phase electricity). The first-pole conductive line 10 and the second-pole conductive line 20 are both connected from the outside of the outer shell 30, then extended in the outer shell 30, and finally connected from the outside of the outer shell 30.

[0030] Specifically, the first-pole conductive circuit 10 includes a first incoming terminal block 11, a first conductive copper busbar 12, a first contact system 13, a first flexible connection 14, a first hard connection 15 and a first outgoing terminal block 16 connected in sequence, and the second-pole conductive circuit 20 includes a second incoming terminal block 21, a second hard connection 22, a second flexible connection 23, a second contact system 24, a second conductive copper busbar 25 and a second outgoing terminal block 26 connected in sequence.

[0031] The outer shell 30 is generally rectangular in structure, including a first side 31 and a second side 32 that are opposite to each other. The first input terminal block 11 and the second input terminal block 21 are spaced apart side by side to expose the first side 31, and the first output terminal block 16 and the second output terminal block 26 are spaced apart side by side to expose the second side 32, so that the first pole conductive circuit 10 and the second pole conductive circuit 20 are parallel input and parallel output structures.

[0032] For the convenience of description, the first incoming line terminal block 11 is located on the left side of the second incoming line terminal block 21 in the horizontal direction. Figure 2 The T1 direction is to the left, and the opposite T2 direction is to the right; and the first incoming terminal block 11 and the second incoming terminal block 21 are located on the longitudinal upper side of the outer shell 30, that is, Figure 2 The direction T3 is upward, and the opposite direction T4 is downward. The first incoming terminal block 11 and the first conductive copper bar 12 are arranged to extend downward, the first contact system 13 and the first flexible connection 14 are arranged to extend to the right, and the first outgoing terminal block 16 is arranged to extend downward; the second incoming terminal block 21 is arranged to extend downward, the second flexible connection 23 and the second contact system 24 are arranged to extend to the left, and the second conductive copper bar 25 and the second outgoing terminal block 26 are arranged to extend downward; the first contact system 13 crosses the second conductive copper bar 25, so that the first pole conductive line 10 and the second pole conductive line 20 intersect each other.

[0033] Through the above arrangement, in this embodiment, the first-pole conductive line 10 and the second-pole conductive line 20 are first parallel to each other, horizontally bent, and then cross each other, and finally parallel to each other through the first outlet terminal block 16 and the second outlet terminal block 26, respectively, so that the first contact system 13 and the second contact system 24 are arranged in parallel and horizontally in the outer shell 30, and the width space between the first inlet terminal block 11 and the second inlet terminal block 21 is effectively used to horizontally arrange the contact system and the operating mechanism (not shown) for manipulating the contact system, thereby reducing the overall volume of the circuit breaker. At the same time, the inlet end of the circuit breaker is at the top and the outlet end is at the bottom. Such a layout mode of single-side inlet and single-side outlet makes the wiring of the external wiring of the circuit breaker more concise, and more preferably, the connection line of the first inlet terminal block 11 and the second outlet terminal block 26 is roughly parallel to the connection line of the second inlet terminal block 21 and the first outlet terminal block 16, so as to facilitate wiring. The straight direction of the first and second conductive lines 10 and 20 facilitates installation and can also match the substantially rectangular shape of the outer shell 30 to make the most of the internal space of the outer shell 30 .

[0034] like Figure 3 , 4 The first contact system 13 specifically includes a first static contact 132 disposed on the first conductive copper bar 12 and a first moving contact 131 connected to the first flexible connection 14. The second contact system 24 includes a second static contact 242 disposed on the second conductive copper bar 25 and a second moving contact 241 connected to the second flexible connection 23.

[0035] In this embodiment, the first contact system 13 and the second contact system 24 have a first breaking motion track and a second breaking motion track respectively, and the extension direction of the first outlet terminal block 16 and the second outlet terminal block 26 is perpendicular to the motion plane where the first breaking motion track and the second breaking motion track are located. Thus, the operating mechanism of the circuit breaker can swing horizontally to facilitate operation.

[0036] In this embodiment, the first arc extinguishing chamber and the second arc extinguishing chamber (not shown in the figure) respectively cover the first breaking motion trajectory and the second breaking motion trajectory, and the first overcurrent release and the second overcurrent release (not shown in the figure) are respectively installed on the first hard connection 15 and the second hard connection 22. Arc extinguishing and short circuit protection are respectively achieved through the arc extinguishing chamber and the overcurrent release.

[0037] In this embodiment, the first hard connection 15 is a bent sheet, and its bent structure connects the first flexible connection 14 arranged horizontally left and right and the first output terminal block 16 arranged vertically up and down. The second hard connection 22 is a bent sheet, and its bent structure connects the second input terminal block 21 arranged vertically up and down and the second flexible connection 23 arranged horizontally left and right. Thereby, the circuit breaker structure can be made more compact.

[0038] Embodiment 2:

[0039] This embodiment proposes a distribution box, including the bipolar circuit breaker in embodiment 1 arranged at its incoming line end. Since the bipolar circuit breakers respectively enter in parallel from the upper end, cross and overlap in the middle of the circuit breaker, and then exit in parallel along the lower end, the outgoing line end can be conveniently connected to other small circuit breakers in the distribution box. At the same time, on the basis of the reduced volume of the bipolar circuit breaker, there is still enough space to place the arc extinguishing chamber and the overcurrent release, so as to ensure that the circuit breaker has complete circuit breaking and arc extinguishing functions, thereby ensuring the safety performance of the circuit.

[0040] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes made to the present invention in form and detail, without departing from the spirit and scope of the present invention as defined in the appended claims, shall fall within the scope of protection of the present invention.

Claims

1. A double-pole circuit breaker, comprising an outer shell, a first-pole conductive line and a second-pole conductive line, wherein the first-pole conductive line and the second-pole conductive line are both fed from outside the outer shell, then extend inside the outer shell, and finally exit from outside the outer shell, characterized in that: The first-pole conductive circuit includes a first incoming terminal block, a first conductive copper bar, a first contact system, a first flexible connection, a first hard connection, and a first outgoing terminal block connected in sequence, and the second-pole conductive circuit includes a second incoming terminal block, a second hard connection, a second flexible connection, a second contact system, a second conductive copper bar, and a second outgoing terminal block connected in sequence. The outer shell comprises a first side and a second side that are separated from each other, the first incoming terminal block and the second incoming terminal block are spaced side by side to expose the first side, and the first outgoing terminal block and the second outgoing terminal block are spaced side by side to expose the second side. The first incoming terminal block is located on the left side of the second incoming terminal block in the transverse direction, and the first incoming terminal block and the second incoming terminal block are located on the upper side of the outer shell in the longitudinal direction, the first incoming terminal block and the first conductive copper bar are extended downward, the first contact system and the first flexible connection are extended to the right, and the first outgoing terminal block is extended downward; The second incoming terminal seat is extended downward, the second flexible connection and the second contact system are extended to the left, the second conductive copper bar and the second outgoing terminal seat are extended downward, The first contact system crosses the second conductive copper busbar, so that the first-pole conductive line and the second-pole conductive line cross each other.

2. The double-pole circuit breaker according to claim 1, characterized in that: A line connecting the first incoming terminal block and the second outgoing terminal block is parallel to a line connecting the second incoming terminal block and the first outgoing terminal block.

3. The double-pole circuit breaker according to claim 1, characterized in that: The first contact system includes a first stationary contact arranged on a first conductive copper busbar and a first moving contact connected to a first flexible connection.

4. The double-pole circuit breaker according to claim 1, characterized in that: The second contact system includes a second stationary contact arranged on the second conductive copper busbar and a second moving contact connected to the second flexible connection.

5. The double-pole circuit breaker according to claim 1, characterized in that: The first contact system and the second contact system respectively have a first disconnecting motion trajectory and a second disconnecting motion trajectory, and the extension direction of the first outlet terminal block and the second outlet terminal block is perpendicular to the motion plane where the first disconnecting motion trajectory and the second disconnecting motion trajectory are located.

6. The double-pole circuit breaker according to claim 5, characterized in that: It also includes a first arc extinguishing chamber and a second arc extinguishing chamber covering the first breaking motion trajectory and the second breaking motion trajectory respectively.

7. The double-pole circuit breaker according to claim 1, characterized in that: The first hard connection is a bent sheet, and the first soft connection arranged horizontally left and right and the first outlet terminal seat arranged vertically up and down are connected through its bending structure.

8. The double-pole circuit breaker according to claim 1, characterized in that: The second hard connection is a bent sheet, and the second incoming terminal blocks arranged vertically up and down and the second soft connection arranged horizontally left and right are connected through its bending structure.

9. The double-pole circuit breaker according to claim 1, characterized in that: Also included are a first overcurrent release and a second overcurrent release mounted on the first hard connection and the second hard connection, respectively.

10. A distribution box, comprising a bipolar circuit breaker arranged at the incoming line end thereof, characterized in that: The bipolar circuit breaker is the bipolar circuit breaker described in any one of claims 1-9.

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