Plug-in circuit breaker

Abstract

A plug-in circuit breaker comprises an outer shell and at least one circuit breaker pole, the two opposite ends of the outer shell are an operation end and a wiring end respectively, the operation end is provided with an operation hole, the wiring end is provided with at least one pair of wiring sockets arranged at intervals, an air outlet is formed between each pair of wiring sockets, an inner shell is arranged in the outer shell, and the inner shell is provided with an air outlet. At least one circuit breaker pole is arranged in the inner shell, an exhaust port of each circuit breaker pole is arranged at one end of the inner shell, and the exhaust ports are correspondingly communicated with the air outlets. According to the utility model, the inner shell is used for accommodating the circuit breaker poles, a modular structure is favorably formed, the assembly is convenient, and the exhaust port of each circuit breaker pole is arranged at one end of the inner shell and is communicated with the air outlet positioned between the wiring sockets, so that high-temperature tail gas is discharged from the wiring terminals, and the overall temperature rise is favorably reduced; and the performance and safety of parallel use of a plurality of products are ensured.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a plug-in circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. The existing molded case circuit breakers have the following defects: first, the internal layout is complex, which is not conducive to assembly; second, the exhaust gas outlet and the wiring terminals are respectively arranged on different side walls of the shell, which makes the temperature of multiple side walls of the shell higher, resulting in a high overall temperature rise, making it difficult to ensure the performance and safety of multiple products when installed side by side; third, there is no space for separate wiring inside, which makes wiring difficult and prone to poor contact. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a plug-in circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a plug-in circuit breaker, comprising a shell and at least one circuit breaker pole, the two opposite ends of the shell are respectively an operating end and a wiring end, the operating end is provided with an operating hole, the wiring end is provided with at least one pair of wiring sockets arranged at intervals, an air outlet is provided between each pair of wiring sockets, an inner shell is provided inside the shell, at least one circuit breaker pole is provided inside the inner shell, the exhaust port of each circuit breaker pole is provided at one end of the inner shell, and the exhaust port is correspondingly connected with the air outlet.

[0006] Preferably, at least one side wall of the housing is provided with a plurality of heat dissipation holes arranged at intervals.

[0007] Preferably, at least one wiring cavity is left between the outer side wall of the inner shell and the inner side wall of the outer shell.

[0008] Preferably, a wiring port is provided at least at one side position of the wiring terminal, and the wiring port is communicated with the wiring cavity.

[0009] Preferably, the wiring cavity is divided into a first wiring cavity and a second wiring cavity, and the first wiring cavity and the second wiring cavity are respectively arranged along two adjacent outer side walls of the inner shell, the first wiring cavity is connected to the wiring socket, and the second wiring cavity is connected to the wiring port.

[0010] Preferably, a wiring board is provided in the second wiring cavity.

[0011] Preferably, a heat dissipation hole is provided on the side wall of the housing corresponding to the first wiring cavity.

[0012] Preferably, a cover plate is disposed in the first wiring cavity, a heat dissipation hole is provided on the cover plate, and the cover plate and the heat dissipation hole on the side wall of the housing are offset and opposite to each other.

[0013] Preferably, at least one pair of terminal mounting grooves are provided on opposite sides outside one end of the inner shell, and each terminal mounting groove is located in a region of a first wiring cavity close to a wiring socket.

[0014] Preferably, a space serving as an accessory slot is reserved between the operating end and one end of the adjacent inner shell, and the accessory slots are distributed on both sides of the operating hole.

[0015] Preferably, each of the circuit breaker poles includes an arc extinguishing system, which includes an arc extinguishing chamber arranged in the middle of the inner shell, an exhaust channel is connected between the arc extinguishing chamber and the exhaust port, and at least one arc extinguishing member is arranged in the area of ​​the exhaust channel close to the exhaust port.

[0016] Preferably, the wiring terminal is provided with at least two pairs of wiring sockets, an isolation plate is provided between two adjacent pairs of wiring sockets, and two adjacent air outlets are separated by the isolation plate.

[0017] Preferably, the outer shell includes a pair of end covers arranged at intervals, the two end covers serve as an operating end and a wiring end respectively, and two pairs of side walls are connected between the pair of end covers, wherein a pair of spaced-apart side walls are first side walls, and the other pair of spaced-apart side walls are second side walls, the first side walls are provided with heat dissipation holes, a first wiring cavity is formed between the first side wall and the outer side wall of the inner shell relative to each other, and a second wiring cavity is formed between the second side wall and the outer side wall of the inner shell relative to each other; the inner shell includes a first cover body and a second cover body assembled with each other, and an exhaust port is provided at one end of the first cover body and / or one end of the second cover body.

[0018] The plug-in circuit breaker of the utility model has an inner shell for accommodating the circuit breaker poles, which is conducive to forming a modular structure and convenient for assembly. The exhaust port of each circuit breaker pole is opened at one end of the inner shell and is connected with the exhaust port located between the wiring sockets, so that the high-temperature exhaust gas is discharged from the wiring terminal, which is conducive to reducing the overall temperature rise and ensuring the performance and safety of multiple products used side by side.

[0019] In addition, heat dissipation holes are opened on the side walls of the shell to further enhance the heat dissipation effect without affecting the internal components.

[0020] In addition, a wiring cavity is left between the inner shell and the outer shell to facilitate wiring, reduce internal complexity, and ensure stable wiring; in particular, a wiring board is arranged in the second wiring cavity to facilitate wiring.

[0021] In addition, an isolation plate is provided between two adjacent pairs of wiring sockets and two adjacent air outlets to improve safety of use.

[0022] In addition, an arc extinguishing device is provided inside each exhaust port to form a zero arcing chamber, thereby improving the safety of use.

[0023] In addition, both the outer shell and the inner shell can be split structures to simplify assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the plug-in circuit breaker of the utility model. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the plug-in circuit breaker of the utility model. Figure 2 ;

[0026] Figure 3 It is a schematic diagram of the structure of the plug-in circuit breaker in the utility model when the shell is disassembled;

[0027] Figure 4 It is a structural schematic diagram of the second end cover and the isolation plate in the utility model;

[0028] Figure 5 It is a structural schematic diagram of the inner shell in the utility model;

[0029] Figure 6 It is a structural schematic diagram of the wiring board in the utility model;

[0030] Reference numerals:

[0031] 1-housing, 101-first end cover, 102-second end cover, 103-first side wall, 104-second side wall 104, 11-operating hole, 12-wiring socket, 13-air outlet, 14-wiring port, 15-heat dissipation hole, 161-first wiring cavity, 162-second wiring cavity, 17-isolation plate, 18-cover plate, 2-inner shell, 21-first cover body, 22-second cover body, 23-exhaust port, 24-terminal mounting groove, 3-wiring board, 31-wire positioning part, 4-wiring terminal, 5-operating mechanism, 6-accessory module, 7-signal terminal. DETAILED DESCRIPTION

[0032] The following is a further description of the specific implementation of the plug-in circuit breaker of the utility model in conjunction with the embodiments given in the accompanying drawings. The plug-in circuit breaker of the utility model is not limited to the description of the following embodiments.

[0033] The plug-in circuit breaker includes a shell 1, one end of the shell 1 is provided with an operating hole 11 as an operating end, and the other end of the shell 1 opposite to the operating end is a wiring terminal, and at least one pair of wiring sockets 12 arranged at intervals are arranged at the wiring terminal; an operating mechanism and at least one circuit breaker pole are arranged in the shell 1, and the operating mechanism is rotatably arranged inside the shell 1 close to the operating end, and the operating mechanism is connected to an operating member, and the operating member extends out of the shell 1 from the operating hole 11, each circuit breaker pole includes a pair of wiring terminals 4, a contact mechanism and an arc extinguishing system, a pair of wiring terminals 4 respectively correspond to a pair of wiring sockets 12 of the wiring terminal, the contact mechanism includes a moving contact and a static contact that cooperate with each other, the moving contact is linked with the operating mechanism, and the moving contact is driven to contact or separate with the static contact by driving the operating mechanism, the arc extinguishing system is arranged on one side of the contact mechanism, and the arc extinguishing system is connected to the air outlet 13 of the shell 1 for discharging the exhaust gas after arc extinguishing.

[0034] Furthermore, a control module is also provided in the housing 1, and the control module includes a circuit board, a controller is provided on the circuit board, and a wiring terminal is provided with a wiring port 14, and a signal terminal 7 connected to the circuit board is exposed through the wiring port 14 for wiring.

[0035] The improvement of the present application is that the wiring terminal between each pair of wiring sockets 12 is provided with an air outlet 13, the outer shell 1 is provided with an inner shell 2, the inner shell 2 is provided with at least one circuit breaker pole, the exhaust port 23 of each circuit breaker pole is provided at one end of the inner shell 2, and the exhaust port 23 is correspondingly connected with the air outlet 13. In this way, the inner shell 2 is used to accommodate the circuit breaker pole, which is conducive to forming a modular structure and convenient for assembly. The exhaust port 23 of each circuit breaker pole is opened at one end of the inner shell 2 and is connected with the air outlet 13 located between the wiring sockets 12, so that the high-temperature exhaust gas is discharged from the wiring terminal, which is conducive to reducing the overall temperature rise and ensuring the performance and safety of multiple products used side by side.

[0036] Furthermore, a plurality of heat dissipation holes 15 are provided at intervals on at least one side wall of the outer shell 1, which can further enhance the heat dissipation effect without affecting the internal structure. Specifically, the plurality of heat dissipation holes 15 can be arranged in an array to form a heat dissipation zone, and the plurality of heat dissipation zones can be arranged at intervals or staggered, and the shape and size of each heat dissipation hole 15 can be adjusted according to actual conditions.

[0037] Furthermore, at least one wiring cavity is left between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, which provides a dedicated wiring space for the circuit breaker and simplifies the wiring and wiring operations. Specifically, the wiring cavity is divided into a first wiring cavity 161 and a second wiring cavity 162. The first wiring cavity 161 and the second wiring cavity 162 are respectively arranged along two adjacent outer walls of the inner shell 2, wherein the first wiring cavity 161 is used to set a conductive plate, and a wiring board 3 can be arranged in the second wiring cavity 162. The wires connected to the circuit breaker can be wired along the wire positioning portion 31. At the same time, the signal terminal 7 of the circuit board can be correspondingly arranged in the second wiring cavity 162, and the second wiring cavity 162 is correspondingly connected to the wiring port 14. Preferably, the wiring port 14 is arranged at a side position of the wiring terminal, and the number of wiring ports 14 can be specifically set according to actual conditions.

[0038] Combination Figure 1-6 A specific embodiment of a plug-in circuit breaker is provided, the plug-in circuit breaker includes a housing 1. In this embodiment, the housing 1 includes a pair of end covers arranged at intervals. For the convenience of description, the two end covers are respectively a first end cover 101 and a second end cover 102, wherein the first end cover 101 is an operating end and is provided with an operating hole 11, and the second end cover 102 is a wiring terminal. Three pairs of wiring sockets 12 arranged side by side are provided at the wiring terminal, each pair of wiring sockets 12 are spaced opposite to each other, and an air outlet 13 is provided in the area between each pair of wiring sockets 12, and a wiring port 14 is provided at the side position of the second end cover 102. Figure 2-4 In the embodiment, a connection port 14 is respectively provided on both sides of the second end cover 102, and three air outlets 13 are located between the two connection ports 14; two pairs of side walls are connected between a pair of end covers, wherein a pair of spaced-apart side walls is a first side wall 103, and a plurality of spaced-apart heat dissipation holes 15 are provided on the first side wall 103, Figure 1-3 In the figure, a plurality of heat dissipation holes 15 form a rectangular heat dissipation area, a plurality of heat dissipation areas arranged in rows and columns are provided on the first side wall 103, wherein the heat dissipation areas of two adjacent rows or columns can be staggered, and the other pair of spaced opposite side walls is the second side wall 104.

[0039] Preferably Figure 4 As shown, the second end cover 102 is provided with two isolation plates 17, each isolation plate 17 is used to isolate two adjacent pairs of wiring sockets 12, and two adjacent air outlets 13 are also separated by the isolation plate 17, so as to avoid mutual influence between two adjacent circuit breaker poles and ensure safe use; further, each isolation plate 17 is assembled with the second end cover 102 in a plug-in manner, that is, a slot is provided on the second end cover 102, and each isolation plate 17 is plugged into a slot.

[0040] An operating mechanism and an inner shell 2 are arranged in the outer shell 1, and three parallel circuit breaker poles are arranged inside the inner shell 2. In this way, it is convenient to form a modular structure with the operating mechanism and the circuit breaker poles for easy assembly. The operating mechanism can adopt the existing technology. The operating mechanism is rotatably arranged between the first end cover 101 and the inner shell 2. The operating member connected to the operating mechanism extends from the operating hole 11 to the outside of the outer shell 1 for manual operation. Preferably, a space as an accessory slot is reserved between the first end cover 101 and one end of the inner shell 2. The accessory slots are distributed on both sides of the operating hole 11, that is, the accessory slots are located on both sides of the operating mechanism. Each accessory slot is used to assemble the accessory module 6 in the circuit breaker. The additional module can be a micro switch, a release, etc.

[0041] Three parallel exhaust ports 23 are provided at one end of the inner shell 2 near the second end cover 102, and each exhaust port 23 corresponds to an exhaust port 13 of the first end cover 101. At least one wiring cavity is left between the outer wall of the inner shell 2 and the inner wall of the outer shell 1. In the present embodiment, four wiring cavities are formed between the inner shell 2 and the outer shell 1, wherein the wiring cavity located between the first side wall 103 and the inner shell 2 is the first wiring cavity 161, and the wiring cavity located between the second side wall 104 and the inner shell 2 is the second wiring cavity 162. In this way, the first wiring cavity 161 and the second wiring cavity 162 are respectively located on two adjacent sides of the inner shell 2, one end of the first wiring cavity 161 is connected to the wiring socket 12, and one end of the second wiring cavity 162 is connected to the wiring port 14. The signal terminal 7 connected to the circuit board is arranged in the second wiring cavity 162 and exposed from the wiring port 14. When the circuit breaker is plugged in and out, the signal connection can be made at the same time. Of course, the circuit board can also be directly arranged in the second wiring cavity 162.

[0042] In this embodiment, if Figure 3 and 5 As shown, the inner shell 2 includes a first cover body 21 and a second cover body 22 assembled with each other, and three parallel chamber structures are formed between the first cover body 21 and the second cover body 22. A partition is provided between two adjacent chambers, and the partition extends to the side of the first cover body 21 and the second cover body 22 facing away from the chamber, respectively, so that the side of the first cover body 21 facing away from the second cover body 22 and the side of the second cover body 22 facing away from the first cover body 21 respectively form three parallel concave cavities, and each concave cavity is spaced apart from the first side wall 103 of the outer shell 1 to form a first wiring cavity 161; further, as Figure 5 As shown, at least one pair of terminal mounting grooves 24 are provided on opposite sides outside one end of the inner shell 2 , and each terminal mounting groove 24 is located in a region of a first wiring cavity 161 close to the wiring socket 12 .

[0043] The outer wall of the inner shell 2 adjacent to the first wiring cavity 161 is provided with a strip groove with a certain width, which can be formed by splicing the first cover body 21 and the second cover body 22, or can be separately opened on the first cover body 21 or the second cover body 22, and the strip groove is spaced relative to the second side wall 104 of the outer shell 1 to form a second wiring cavity 162. Of course, at least one convex ridge can also be provided on the outer wall of the inner shell 2 adjacent to the first wiring cavity 161, and the convex ridge abuts against the second side wall 104 of the outer shell 1, so that the second wiring cavity 162 is formed between the convex ridge, the second side wall 104 and the outer wall of the inner shell 2. It should be noted that the convex ridge, the strip groove and the concave cavity on the outer side of the inner shell 2 mainly play a partitioning role and are not necessary structures.

[0044] Further, such as Figure 3 As shown, a cover plate 18 may be further disposed in the first wiring cavity 161, and a plurality of heat dissipation holes 15 are provided on the surface of the cover plate 18; a wiring board 3 may be disposed in the second wiring cavity 162, and a plurality of wire positioning portions 31 are provided on the side of the wiring board 3 facing the second side wall 104, as shown in FIG. Figure 6 As shown, two rows of wire positioning portions 31 arranged at intervals are provided on the wiring board 3 , and the two rows of wire positioning portions 31 are respectively provided along two sides of the wiring board 3 and are staggered and opposite to each other.

[0045] An exhaust port 23 is provided at one end of each chamber. Figure 5In the embodiment, each exhaust port 23 is formed by one end of the first cover body 21 and one end of the second cover body 22. Of course, the exhaust port 23 can also be separately opened at one end of the first cover body 21 or one end of the second cover body 22; each chamber is equipped with a circuit breaker pole, and each circuit breaker pole can adopt the existing structure, that is, each circuit breaker pole includes a pair of wiring terminals 4, a contact mechanism and an arc extinguishing system, a pair of wiring terminals 4 are respectively arranged in the terminal mounting groove 24 of each first wiring cavity 161, each wiring terminal 4 corresponds to a wiring socket 12, and the conductive plate connected to the wiring terminal 4 can be arranged along the first wiring cavity 161. Preferably, the side of the conductive plate facing the first side wall 103 is covered with a cover plate 18, and the heat dissipation holes 15 on the cover plate 18 are offset and opposite to the heat dissipation holes 15 on the first side wall 103, which ensures Heat dissipation and preventing external impurities from falling directly onto the conductive plate; the contact mechanism includes a moving contact and a static contact that cooperate with each other, the moving contact is linked to the operating mechanism and electrically connected to one of the terminals 4, the static contact is fixed in the inner shell 2 and electrically connected to the other terminal 4, the arc extinguishing system includes an arc extinguishing chamber, the arc extinguishing chamber is cooperatively arranged on one side of the contact mechanism, the arc extinguishing chamber is located in the middle of the inner shell 2, the arc entrance of the arc extinguishing chamber is connected with the contact mechanism, the arc generated by the contact mechanism breaking enters the arc extinguishing chamber from the arc entrance, an exhaust channel is connected between the exhaust end of the arc extinguishing chamber and the exhaust port 23, the exhaust channel is used to buffer the exhaust gas, and at least one arc extinguishing member is arranged in the area of ​​the exhaust channel near the exhaust port 23, preferably, at least three arc extinguishing members are arranged at intervals, so as to form a zero arcing chamber in the exhaust channel near the exhaust port 23, thereby ensuring safety in use.

[0046] Of course, a short-circuit protection mechanism and / or an overload protection mechanism may also be provided in each circuit breaker pole. The short-circuit protection mechanism and the overload protection mechanism cooperate with the operating mechanism respectively, and their structures may adopt the existing technology.

[0047] It should be noted that, in the present embodiment, the outer shell 1 and the inner shell 2 are both split structures for easy assembly and disassembly. The outer shell 1 may be an integral structure, and the inner shell 2 may also be an integral structure, but there may be a defect of inconvenient assembly and disassembly.

[0048] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0049] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a housing (1) and at least one circuit breaker pole, wherein the housing (1) has an operating end and a wiring end at opposite ends thereof, wherein the operating end is provided with an operating hole (11), and the wiring end is provided with at least one pair of wiring sockets (12) arranged at intervals, wherein: An air outlet (13) is provided between each pair of wiring sockets (12); an inner shell (2) is provided inside the outer shell (1); at least one circuit breaker pole is provided inside the inner shell (2); an air outlet (23) of each circuit breaker pole is provided at one end of the inner shell (2); and the air outlet (23) is correspondingly connected to the air outlet (13).

2. The plug-in circuit breaker according to claim 1, characterized in that: At least one side wall of the housing (1) is provided with a plurality of heat dissipation holes (15) arranged at intervals.

3. The plug-in circuit breaker according to claim 1, characterized in that: At least one wiring cavity is left between the outer side wall of the inner shell (2) and the inner side wall of the outer shell (1).

4. The plug-in circuit breaker according to claim 3, characterized in that: A wiring port (14) is provided at least at one side position of the wiring terminal, and the wiring port (14) is connected to the wiring cavity.

5. The plug-in circuit breaker according to claim 4, characterized in that: The wiring cavity is divided into a first wiring cavity (161) and a second wiring cavity (162), and the first wiring cavity (161) and the second wiring cavity (162) are respectively arranged along two adjacent outer side walls of the inner shell (2), the first wiring cavity (161) is connected to the wiring socket (12), and the second wiring cavity (162) is connected to the wiring port (14).

6. The plug-in circuit breaker according to claim 5, characterized in that: A wiring board (3) is arranged in the second wiring cavity (162).

7. The plug-in circuit breaker according to claim 5, characterized in that: A heat dissipation hole (15) is provided on the side wall of the housing (1) corresponding to the first wiring cavity (161).

8. The plug-in circuit breaker according to claim 5, characterized in that: A cover plate (18) is arranged in the first wiring cavity (161), a heat dissipation hole (15) is provided on the cover plate (18), and the cover plate (18) and the heat dissipation hole (15) on the side wall of the housing (1) are offset and opposite to each other.

9. The plug-in circuit breaker according to claim 3, characterized in that: At least one pair of terminal installation grooves (24) are provided on opposite sides outside one end of the inner shell (2), and each terminal installation groove (24) is located in a region of a first wiring cavity (161) close to the wiring socket (12).

10. The plug-in circuit breaker according to claim 1, characterized in that: A space serving as an accessory slot is reserved between the operating end and one end of the adjacent inner shell (2), and the accessory slots are distributed on both sides of the operating hole (11).

11. The plug-in circuit breaker according to claim 1, characterized in that: Each of the circuit breaker poles comprises an arc extinguishing system, the arc extinguishing system comprising an arc extinguishing chamber arranged in the middle of the inner shell (2), an exhaust channel connected between the arc extinguishing chamber and the exhaust port (23), and at least one arc extinguishing member arranged in a region of the exhaust channel close to the exhaust port (23).

12. The plug-in circuit breaker according to claim 1, characterized in that: The wiring terminal is provided with at least two pairs of wiring sockets (12), an isolation plate (17) is provided between two adjacent pairs of wiring sockets (12), and two adjacent air outlets (13) are separated by the isolation plate (17).

13. The plug-in circuit breaker according to any one of claims 1 to 12, characterized in that: The outer shell (1) comprises a pair of end covers arranged at intervals, the two end covers serving as an operating end and a wiring end respectively, two pairs of side walls are connected between the pair of end covers, wherein a pair of side walls spaced opposite to each other are first side walls (103), and the other pair of side walls spaced opposite to each other are second side walls (104), the first side walls (103) are provided with heat dissipation holes (15), a first wiring cavity (161) is formed between the first side wall (103) and the outer side wall of the inner shell (2) opposite to each other, and a second wiring cavity (162) is formed between the second side wall (104) and the outer side wall of the inner shell (2) opposite to each other; the inner shell (2) comprises a first cover body (21) and a second cover body (22) assembled with each other, and an exhaust port (23) is provided at one end of the first cover body (21) and / or one end of the second cover body (22).

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