Shell structure adapting to high breaking capacity of circuit breaker and circuit breaker

Abstract

The utility model relates to a shell structure adapting to high breaking capacity of a circuit breaker and the circuit breaker, the shell structure comprises a base, the base is used for assembling a plurality of breaking units, the base structurally comprises a seat body, the seat body is provided with a plurality of through grooves in one-to-one correspondence with the breaking units, the seat body is provided with bayonets, and the bayonets are arranged in the through grooves. The bayonet is matched with the exhaust port of the breaking unit, so that the exhaust port is communicated with one end of the through groove, and the other end of the through groove is communicated with the outside of the base; and the cover plate is detachably connected with the seat body and is matched with the plurality of through grooves to form a plurality of exhaust channels, so that the thickness size and the manufacturing cost of the circuit breaker are reduced under the condition that the arc extinguishing effect and the equipment and personal safety are ensured.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a housing structure and circuit breaker adapted to high breaking capacity. Background Technology

[0002] The housing of a molded case circuit breaker includes a base, which houses circuit breaker components such as the contact system, terminals, tripping system, and arc extinguishing system, as well as an upper shell that covers these components.

[0003] With the rapid development of my country's new energy sector, higher requirements have been placed on the breaking capacity and breaking voltage of circuit breakers. Currently, the arc extinguishing system of molded case circuit breakers cannot completely eliminate the electric arc and high-temperature ionized gas generated during short-circuit breaking. Some charged particles and ionized gas will be ejected from the circuit breaker body, thus affecting equipment and personal safety.

[0004] Currently, the most common practice is to increase the number of arc-extinguishing grid plates to divide the long arc into short arcs. While this improves the arc-extinguishing effect to some extent, it also increases the thickness of the circuit breaker and the manufacturing cost of the circuit breaker. Utility Model Content

[0005] In response to the shortcomings of the existing production technology, the applicant provides a housing structure and circuit breaker adapted to the high breaking capacity of circuit breakers, thereby reducing the thickness and manufacturing cost of circuit breakers while ensuring arc extinguishing effect and equipment and personal safety.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A housing structure adapted to the high breaking capacity of a circuit breaker includes a base for assembling multiple breaking units. The structure of the base includes:

[0008] The base has multiple through slots that correspond one-to-one with the splitting unit. The base also has a latch that engages with the exhaust port of the splitting unit, so that the exhaust port is connected to one end of the through slot and the other end of the through slot is connected to the outside of the base.

[0009] The cover plate is detachably connected to the seat body and cooperates with multiple through slots to form multiple exhaust channels.

[0010] As a further improvement to the above technical solution:

[0011] The structure of the seat includes a shell-shaped body, on which a layer plate is provided, and on the layer plate are multiple pairs of partitions, each pair of partitions being arranged opposite to each other and forming the through groove with the layer plate.

[0012] A pair of partitions are inserted into both ends of the splitting unit;

[0013] The upper part of the exhaust port is provided with a flange, which is engaged with the end of the layer plate.

[0014] The layer plate is provided with a first through hole for installing wiring terminals, and the cover plate is provided with a second through hole, the second through hole corresponding to the first through hole;

[0015] A guide block is provided on the layer plate between the first perforation and the bayonet. The guide block is used to divide the gas discharged from the exhaust port into two paths, so that the gas is discharged from both sides of the terminal block.

[0016] The cross-section of the guide block is an isosceles triangle, with one vertex of the isosceles triangle opposite to the bayonet and two legs of the isosceles triangle opposite to the partition.

[0017] The two legs of the isosceles triangle correspond to the two guide surfaces of the guide block. The guide surfaces are corrugated, and the direction of the corrugations is consistent with the gas flow direction.

[0018] An arc-suppressing plate is installed at the exhaust port.

[0019] The base has a first threaded hole, and the cover plate has a second threaded hole corresponding to the first threaded hole. The first threaded hole and the second threaded hole are opposite each other. The base and the cover plate are detachably connected by fasteners passing through the first threaded hole and the second threaded hole.

[0020] The base is provided with a slot, and the cover plate is provided with a connector that mates with the slot.

[0021] A circuit breaker comprising a housing structure as described in any of the preceding claims, adapted to the high breaking capacity of a circuit breaker.

[0022] As a further improvement to the above technical solution:

[0023] The circuit breaker is a double-break circuit breaker. The breaking unit of the circuit breaker includes a first arc-extinguishing chamber and a second arc-extinguishing chamber. A first vent is provided on the first arc-extinguishing chamber, and a second vent is provided on the second arc-extinguishing chamber. The second vent is located on the back of the circuit breaker and is connected to the venting channel.

[0024] The beneficial effects of this utility model are as follows:

[0025] This utility model has a compact and reasonable structure and is easy to operate. By adopting a split design for the circuit breaker housing base and forming an exhaust channel on the base, the gas in the breaking unit is discharged after consuming energy through the exhaust channel, which extends the arcing channel, weakens the gas energy, and reduces the arcing distance outside the housing. Thus, while ensuring the arc extinguishing effect and the safety of equipment and personnel, the thickness and manufacturing cost of the circuit breaker are reduced.

[0026] This utility model also has the following advantages:

[0027] The triangular guide block divides the gas discharged from the exhaust port into two paths. A corrugated structure is set on the guide surface of the guide block to interfere with the flowing gas, consume the gas's own energy, and shorten the length of the exhaust channel. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a cross-sectional view of the present invention.

[0030] Figure 3 This is an exploded view of the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of the base of this utility model.

[0032] Figure 5 This is a schematic diagram of the structure of the cover plate of this utility model.

[0033] Figure 6 This is a schematic diagram of the structure of the segmentation unit of this utility model.

[0034] in:

[0035] 1. Upper casing; 2. Tripping system;

[0036] 3. Breaking unit; 31. First arc-extinguishing chamber; 311. First exhaust port; 32. Double-acting contact; 33. Second arc-extinguishing chamber; 331. Second exhaust port; 34. Flange; 35. Arc-extinguishing plate;

[0037] 4. Base;

[0038] 41. Cover plate; 411. Second threaded hole; 412. Second through hole; 413. Connector;

[0039] 42. Base; 420. Shell-shaped body; 421. Partition; 422. Guide block; 423. Guide surface; 424. Shelf; 425. Bayonet; 426. First threaded hole; 427. Slot; 428. First through hole;

[0040] 5. Exhaust passage; 6. Wiring terminals. Detailed Implementation

[0041] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0042] See Figures 1-4 One embodiment of this application provides a housing structure adapted to the high breaking capacity of a circuit breaker, including a base 4 for assembling multiple breaking units 3. The structure of the base 4 includes a seat 42 and a cover plate 41.

[0043] The base 42 is provided with multiple through slots corresponding to the disconnecting unit 3. The base 42 is provided with a bayonet 425. The bayonet 425 cooperates with the exhaust port of the disconnecting unit 3 so that the exhaust port is connected to one end of the through slot and the other end of the through slot is connected to the outside of the base 4.

[0044] The cover plate 41 is detachably connected to the seat 42, and cooperates with multiple through slots to form multiple exhaust channels 5.

[0045] In addition to the disconnection unit 3, the base 4 also contains a tripping system 2 connected to the disconnection unit 3. The upper shell 1 covers the base 4, and the handle of the tripping system 2 extends out of the upper shell 1.

[0046] The circuit breaker housing base 4 adopts a split design, and an exhaust channel 5 is formed on the base 4. The gas in the breaking unit 3 is discharged after consuming energy through the exhaust channel 5, which prolongs the arcing channel, weakens the gas energy, and reduces the arcing distance outside the housing. This reduces the thickness and manufacturing cost of the circuit breaker while ensuring the arc extinguishing effect and the safety of equipment and personnel.

[0047] In one exemplary embodiment, such as Figure 3 , Figure 4 As shown, the structure of the seat 42 includes a shell-shaped body 420, a shelf 424 is provided on the shell-shaped body 420, and multiple pairs of partitions 421 are provided on the shelf 424. Each pair of partitions 421 is arranged opposite to each other and forms a through groove with the shelf 424.

[0048] In this embodiment, as Figure 2 , Figure 3 , Figure 6 As shown, a pair of partitions 421 are inserted into the two ends of the splitting unit 3; a flange 34 is provided on the upper part of the exhaust port, and the flange 34 is engaged with the end of the shelf 424.

[0049] For example, when installing the splitting unit 3, the splitting unit 3 is placed on the base 4. When the exhaust port of the splitting unit 3 is aligned with one end of the through groove, the two sides of the exhaust port are inserted downward along the partition plate 421. After the lower part of the exhaust port contacts the cover plate 41, the flange 34 is engaged with the end of the layer plate 424. Then the cover plate 41 presses the splitting unit 3 onto the base 4. The connection structure is simple and the assembly is convenient.

[0050] In one exemplary embodiment, such as Figures 3-5 As shown, the shelf 424 is provided with a first through hole 428 for installing the terminal block 6, and the cover plate 41 is provided with a second through hole 412, which corresponds to the first through hole 428.

[0051] A guide block 422 is provided on the layer plate 424 between the first perforation 428 and the bayonet 425. The guide block 422 is used to divide the gas discharged from the exhaust port into two paths so that the gas is discharged from both sides of the terminal 6.

[0052] In another exemplary embodiment, such as Figure 4 As shown, the cross-section of the guide block 422 is an isosceles triangle, with one vertex of the isosceles triangle opposite to the bayonet 425, and the two legs of the isosceles triangle opposite to the partition 421.

[0053] In this embodiment, the two legs of the isosceles triangle correspond to the two guide surfaces 423 of the guide block 422. The guide surfaces 423 are corrugated, and the arrangement direction of the corrugations is consistent with the gas flow direction.

[0054] The triangular guide block 422 divides the gas discharged from the exhaust port into two paths. A corrugated structure is set on the guide surface 423 of the guide block 422 to interfere with the flowing gas, consume the energy of the gas itself, and shorten the length of the exhaust channel 5.

[0055] For example, an arc-suppressing plate 35 is installed at the exhaust port. The arc-suppressing plate 35 is a perforated metal plate.

[0056] In one exemplary embodiment, such as Figure 4 , Figure 5 As shown, the base 42 is provided with a first threaded hole 426, and the cover plate 41 is provided with a second threaded hole 411 corresponding to the first threaded hole 426. The first threaded hole 426 and the second threaded hole 411 are opposite to each other. The base 42 and the cover plate 41 are detachably connected by fasteners passing through the first threaded hole 426 and the second threaded hole 411.

[0057] The base 42 is provided with a slot 427, and the cover plate 41 is provided with a connector 413 that mates with the slot 427.

[0058] The assembly structure of fastening and plugging is adopted to improve the assembly efficiency of the base 42 and the cover plate 41.

[0059] In one exemplary embodiment, this application provides a circuit breaker including a housing structure adapted to the high breaking capacity of a circuit breaker according to any of the embodiments described above.

[0060] In another exemplary embodiment, the circuit breaker is a double-break circuit breaker. The breaking unit 3 of the circuit breaker includes a first arc-extinguishing chamber 31 and a second arc-extinguishing chamber 33. A first vent 311 is provided on the first arc-extinguishing chamber 31, and a second vent 331 is provided on the second arc-extinguishing chamber 33. The second vent 331 is located on the back of the circuit breaker and communicates with the venting channel 5. A double-acting contact 32 is installed between the first arc-extinguishing chamber 31 and the second arc-extinguishing chamber 33.

[0061] The disconnecting unit 3 in this embodiment has two vents. The venting channel 5 is set at the vent on the back of the circuit breaker to optimize the external structure of the circuit breaker.

[0062] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A housing structure adapted to the high breaking capacity of circuit breakers, characterized in that: Includes a base (4) for assembling multiple segmented units (3), the structure of the base (4) including: The base (42) is provided with a plurality of through slots corresponding one-to-one with the splitting unit (3). The base (42) is provided with a bayonet (425). The bayonet (425) cooperates with the exhaust port of the splitting unit (3) so that the exhaust port is connected to one end of the through slot and the other end of the through slot is connected to the outside of the base (4). The cover plate (41) is detachably connected to the seat (42) and cooperates with multiple through slots to form multiple exhaust channels (5).

2. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 1, characterized in that: The structure of the seat (42) includes a shell-shaped body (420), on which a shelf (424) is provided, and on which multiple pairs of partitions (421) are provided, each pair of partitions (421) being arranged opposite to each other and forming the through groove with the shelf (424).

3. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 2, characterized in that: A pair of partitions (421) are inserted into both ends of the splitting unit (3); The upper part of the exhaust port is provided with a flange (34), which is engaged with the end of the layer plate (424).

4. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 2, characterized in that: The layer plate (424) is provided with a first through hole (428) for installing a terminal block (6), and the cover plate (41) is provided with a second through hole (412), the second through hole (412) corresponding to the first through hole (428); A guide block (422) is provided on the layer plate (424) between the first perforation (428) and the bayonet (425). The guide block (422) is used to divide the gas discharged from the exhaust port into two paths so that the gas is discharged from both sides of the terminal (6).

5. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 4, characterized in that: The cross-section of the guide block (422) is an isosceles triangle, with one vertex of the isosceles triangle opposite to the bayonet (425) and the two legs of the isosceles triangle opposite to the partition (421).

6. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 5, characterized in that: The two legs of the isosceles triangle correspond to the two guide surfaces (423) of the guide block (422). The guide surfaces (423) are corrugated, and the arrangement direction of the corrugations is consistent with the gas flow direction.

7. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 1, characterized in that: The exhaust port is equipped with an arc-suppressing plate (35).

8. The housing structure adapted to the high breaking capacity of circuit breakers as described in claim 1, characterized in that: The base (42) is provided with a first threaded hole (426), and the cover plate (41) is provided with a second threaded hole (411) corresponding to the first threaded hole (426). The first threaded hole (426) and the second threaded hole (411) are opposite to each other. The base (42) and the cover plate (41) are detachably connected by fasteners passing through the first threaded hole (426) and the second threaded hole (411). The base (42) is provided with a slot (427), and the cover plate (41) is provided with a plug (413) that mates with the slot (427).

9. A circuit breaker, characterized in that: Includes a housing structure adapted to the high breaking capacity of a circuit breaker as described in any one of claims 1-8.

10. The circuit breaker as claimed in claim 9, characterized in that: The circuit breaker is a double-break circuit breaker. The breaking unit (3) of the circuit breaker includes a first arc-extinguishing chamber (31) and a second arc-extinguishing chamber (33). A first exhaust port (311) is provided on the first arc-extinguishing chamber (31), and a second exhaust port (331) is provided on the second arc-extinguishing chamber (33). The second exhaust port (331) is located on the back of the circuit breaker and is connected to the exhaust channel (5).

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