CN108461331B - Double-power-supply control structure of multi-pole circuit breaker - Google Patents
Double-power-supply control structure of multi-pole circuit breaker Download PDFInfo
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- CN108461331B CN108461331B CN201710088538.6A CN201710088538A CN108461331B CN 108461331 B CN108461331 B CN 108461331B CN 201710088538 A CN201710088538 A CN 201710088538A CN 108461331 B CN108461331 B CN 108461331B
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- circuit breaker
- locking
- power supply
- locking part
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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Abstract
The double-power-supply control structure of the multi-pole circuit breaker comprises a locking connecting rod arranged between two adjacent single-pole circuit breakers of the multi-pole circuit breaker, wherein the two adjacent single-pole circuit breakers are a first circuit breaker and a second circuit breaker, the first circuit breaker is connected with a main power supply, and the second circuit breaker is connected with a standby power supply; the locking connecting rod comprises a first locking part and a second locking part which are positioned at two ends, and a connecting part connected between the first locking part and the second locking part, wherein the first locking part is matched with a lock catch of a first circuit breaker, and the second locking part is matched with a contact support of a second circuit breaker; when a first circuit breaker breaks down, a standby power supply is switched on through switching-on of a second circuit breaker, and meanwhile, a contact of the second circuit breaker supports and drives a second locking part to act, so that the first locking part pulls a lock catch of the first circuit breaker, and the first circuit breaker trips to realize disconnection of a main power supply. The invention provides a double-power-supply control structure of a multi-pole circuit breaker, which has the advantages of simple structure, low cost and high safety.
Description
Technical Field
The invention relates to the field of low-voltage electrical appliances, in particular to a dual-power-supply control structure of a multi-pole circuit breaker.
Background
The main power supply and standby power supply control method in the existing circuit breaker power distribution system generally comprises the following steps: the first is to adopt dual power supply control, but this kind of mode has the problem of higher cost, leads to being unsuitable for extensive popularization and application; the second is to adopt two way circuit breakers to switch over the operation, but this kind of mode has unable interlocking between two way circuit breakers to there is the risk that two way power appears the short circuit, and the safety in utilization is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-power-supply control structure of a multi-pole circuit breaker, which has the advantages of simple structure, low cost and high safety.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-power-supply control structure of a multi-pole circuit breaker comprises a locking connecting rod 1 arranged between two adjacent single-pole circuit breakers of the multi-pole circuit breaker, wherein the two adjacent single-pole circuit breakers are a first circuit breaker 2 and a second circuit breaker 3, the wire inlet end of the first circuit breaker 2 is connected with a main power supply, and the wire inlet end of the second circuit breaker 3 is connected with a standby power supply; the locking link 1 comprises a first locking part 11 and a second locking part 14 at two ends, and a connecting part connected between the first locking part 11 and the second locking part 14, wherein the first locking part 11 is matched with a lock catch 21 of the first circuit breaker 2, and the second locking part 14 is matched with a contact support 22 of the second circuit breaker 3;
when the first circuit breaker 2 breaks down, the second circuit breaker 3 is switched on to switch on the standby power supply, and meanwhile, the contact support 22 of the second circuit breaker 3 drives the second locking part 14 of the locking connecting rod 1 to act, so that the first locking part 11 of the locking connecting rod 1 pulls the lock catch 21 of the first circuit breaker 2, and the first circuit breaker 2 is tripped to realize the disconnection of the main power supply.
Preferably, the multi-pole circuit breaker further comprises a third circuit breaker 4, the third circuit breaker 4 is a single-pole circuit breaker assembled on one side of the second circuit breaker 3, the second circuit breaker 3 is positioned between the first circuit breaker 2 and the third circuit breaker 4, and the third circuit breaker 4 is connected to the main power supply in parallel with the first circuit breaker 2; the number of the locking connecting rods 1 is at least two, one of the locking connecting rods is arranged between the first circuit breaker 2 and the second circuit breaker 3, the other one of the locking connecting rods is arranged between the second circuit breaker 3 and the third circuit breaker 4, the first locking part 11 of the locking connecting rod 1 between the third circuit breaker 4 and the second circuit breaker 3 is matched with the lock catch 21 of the second circuit breaker 3, and the second locking part 14 of the locking connecting rod is matched with the contact support 22 of the third circuit breaker 4.
Preferably, the internal structure of the housing of the first circuit breaker 2 and the second circuit breaker 3 is the same, and the first circuit breaker and the second circuit breaker comprise a handle 24, a latch 21 and a contact support 22 which are pivotally mounted in the housing, the handle 24 is in driving connection with the contact support 22 through a transmission assembly, and the latch 21 is in locking fit with a jump buckle 25 of the transmission assembly; the first locking portion 11 of the locking link 1 is hooked on the latch 21 of the first circuit breaker 2, and the second locking portion 14 of the locking link 1 is hooked on the contact support 22 of the second circuit breaker 3.
Preferably, the housing 20 of the first circuit breaker 2 is provided with a first through hole 200 for the movement of the first locking part 11; the housing 30 of the second circuit breaker 3 is provided with a second through hole 300 for the second locking portion 14 to move.
Preferably, the lock catch 21 is provided with lock teeth which are in locking fit with the jump buckle 25, and one end of the jump buckle 25 can be snapped in the lock teeth of the lock catch 21.
Preferably, the trip device of the single-pole circuit breaker includes a bimetal 26 and an electromagnetic trip 27, the electromagnetic trip 27 includes a striker in touch engagement with the latch 21, and the bimetal 26 is in touch engagement with the latch 21.
Preferably, the latch 21 of the first circuit breaker 2 is located between the bimetal 26 and the electromagnetic trip 27, the middle portion of the latch 21 is pivotally installed in the housing 20, and one end of the latch 21 is engaged with the striker of the electromagnetic trip 27 and the other end is engaged with the bimetal 26 and the first locking portion 11 of the locking link 1.
Preferably, the first and second locking portions 11 and 14 are two bar-shaped structures protruding from the top and bottom surfaces of the connecting portion, respectively.
Preferably, the connecting portion includes a first connecting bar 12 and a second connecting bar 13 which are connected in a staggered manner, a side wall of one end of the first connecting bar 12 is attached to a side wall of one end of the second connecting bar 13, the other end of the first connecting bar 12 is connected to the first locking portion 11, and the other end of the second connecting bar 13 is connected to the second locking portion 14.
Preferably, the two strip-shaped structures are parallel to each other, the first locking part 11 is obliquely arranged on the connecting part and forms an angle α with the bottom surface of the connecting part, the second locking part 14 is obliquely arranged on the connecting part and forms an angle β with the top surface of the connecting part, and the angle α is the same as the angle β and is larger than 90 degrees and smaller than 180 degrees.
According to the double-power-supply control structure of the multi-pole circuit breaker, the two ends of the locking connecting rod are respectively matched with the lock catch of the first circuit breaker and the contact support of the second circuit breaker, so that the one-way conversion of double power supplies can be realized, the one-way locking of the second circuit breaker on the first circuit breaker can be realized, the structure is simple, the power supply switching operation is convenient and quick, the use cost is reduced, meanwhile, the contact support is adopted to drive the locking connecting rod, the synchronous operation of the double power supply switching and the locking operation of a fault circuit breaker is realized, the locking operation reliability is high, the short circuit risk of two paths of power supplies is effectively.
Drawings
Fig. 1 is a top view of a first embodiment of the multi-pole circuit breaker of the present invention;
FIG. 2 is a schematic structural view of the locking link of the present invention;
fig. 3 is a right perspective view of a first embodiment of an exploded multi-pole circuit breaker of the present invention;
fig. 4 is a left perspective view of a first embodiment of an exploded multi-pole circuit breaker of the present invention;
figure 5 is a partially cut-away schematic structural view of the multiple pole circuit breaker housing of figure 4 in accordance with the present invention;
fig. 6 is a top view of a second embodiment of the multi-pole circuit breaker of the present invention;
fig. 7 is a front view of an inner structure of a case of the first circuit breaker in a closing state of the present invention;
fig. 8 is a perspective view of an inner structure of a case of the first circuit breaker in a closing state of the present invention;
fig. 9 is a front view of an inner structure of a case of the first circuit breaker in an opening state of the present invention;
fig. 10 is a perspective view of the internal structure of the case of the first circuit breaker in the opening state of the present invention.
Detailed Description
The following describes the dual power supply control structure of the multi-pole circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 10. The dual power supply control structure of the multi-pole circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-5, the dual power supply control structure of the multi-pole circuit breaker of the present invention includes a locking link 1 disposed between two adjacent single-pole circuit breakers of the multi-pole circuit breaker, the lock catch 21 of the single-pole circuit breaker and the trip device cooperate to realize the trip of the single-pole circuit breaker, the contact support 22 of the single-pole circuit breaker can drive the moving contact 23 to realize the opening and closing of the single-pole circuit breaker, the two adjacent single-pole circuit breakers are a first circuit breaker 2 and a second circuit breaker 3, the incoming line end of the first circuit breaker 2 is connected with a main power supply, and the incoming line end of the second circuit breaker 3; the locking link 1 comprises a first locking part 11 and a second locking part 14 at two ends, and a connecting part connected between the first locking part 11 and the second locking part 14, wherein the first locking part 11 is matched with a lock catch 21 of the first circuit breaker 2, and the second locking part 14 is matched with a contact support 22 of the second circuit breaker 3; when the first circuit breaker 2 breaks down, the second circuit breaker 3 is switched on to switch on the standby power supply, and meanwhile, the contact support 22 of the second circuit breaker 3 drives the second locking part 14 of the locking connecting rod 1 to act, so that the first locking part 11 of the locking connecting rod 1 pulls the lock catch 21 of the first circuit breaker 2, and the first circuit breaker 2 is tripped to realize the disconnection of the main power supply. According to the double-power-supply control structure of the multi-pole circuit breaker, the two ends of the locking connecting rod are respectively matched with the lock catch of the first circuit breaker and the contact support of the second circuit breaker, so that the one-way conversion of double power supplies can be realized, the one-way locking of the second circuit breaker on the first circuit breaker can be realized, the structure is simple, the power supply switching operation is convenient and quick, the use cost is reduced, meanwhile, the contact support is adopted to drive the locking connecting rod, the synchronous operation of the double power supply switching and the locking operation of a fault circuit breaker is realized, the locking operation reliability is high, the short circuit risk of two paths of power supplies is effectively.
As shown in fig. 1, in the first embodiment of the dual power supply control structure of the multi-pole circuit breaker of the present invention, the multi-pole circuit breaker of the present embodiment is formed by assembling two single-pole circuit breakers, i.e., a first circuit breaker 2 and a second circuit breaker 3. The multi-pole circuit breaker of the embodiment has a unidirectional power switching function for switching a main power supply to a backup power supply, and the second circuit breaker 3 can realize locking of the first circuit breaker 2 in a trip state through the locking link 1. Of course, the circuit breaker may be assembled outside the first circuit breaker 2 and/or the second circuit breaker 3 in this embodiment.
As shown in fig. 6, in the second embodiment of the dual power supply control structure of the multi-pole circuit breaker of the present invention, the number of poles of the multi-pole circuit breaker of the present embodiment is three, the multi-pole circuit breaker is formed by assembling a first circuit breaker 2, a second circuit breaker 3 and a third circuit breaker 4, and the internal structures of the housings of the first circuit breaker 2, the second circuit breaker 3 and the third circuit breaker 4 are the same; the third circuit breaker 4 is a single-pole circuit breaker assembled on one side of the second circuit breaker 3, the second circuit breaker 3 is positioned between the first circuit breaker 2 and the third circuit breaker 4, and the third circuit breaker 4 and the first circuit breaker 2 are connected to a main power supply in parallel; the number of the locking connecting rods 1 is at least two, one of the locking connecting rods is arranged between the first circuit breaker 2 and the second circuit breaker 3, the other one of the locking connecting rods is arranged between the second circuit breaker 3 and the third circuit breaker 4, the first locking part 11 of the locking connecting rod 1 between the third circuit breaker 4 and the second circuit breaker 3 is matched with the lock catch 21 of the second circuit breaker 3, and the second locking part 14 of the locking connecting rod is matched with the contact support 22 of the third circuit breaker 4. The multi-pole circuit breaker of the embodiment has a bidirectional switching function of a main power supply and a standby power supply, the second circuit breaker 3 can realize the locking of the first circuit breaker 2 in a trip state through one locking link 1, and the third circuit breaker 4 can realize the locking of the second circuit breaker 3 in the trip state through the other locking link 1. The third circuit breaker connects in parallel to the main power supply and realizes the locking of the second circuit breaker through the locking connecting rod, thereby realizing switching from the standby power supply to the main power supply, making the whole multi-pole circuit breaker have the function of dual power interconversion, switching more flexibly, and improving the use convenience and application range. Of course, the circuit breakers can be assembled outside the first circuit breaker 2 and/or the third circuit breaker 4 in this embodiment.
As shown in fig. 7-10, the internal structure of the housing of the single-pole circuit breaker of the present invention, the internal structure of the housing of the first circuit breaker 2 is the same as that of the second circuit breaker 3, and the internal structure of the housing of the second circuit breaker 3 comprises a handle 24, a latch 21 and a contact support 22, wherein the handle 24 is pivotally installed in the housing, the latch 21 is in driving connection with the contact support 22 through; the first locking portion 11 of the locking link 1 is hooked on the latch 21 of the first circuit breaker 2, and the second locking portion 14 of the locking link 1 is hooked on the contact support 22 of the second circuit breaker 3. Specifically, the lock catch 21 is provided with lock teeth which are in locking fit with the jump buckle 25, and one end of the jump buckle 25 can be snapped in the lock teeth of the lock catch 21.
In addition, a first through hole 200 for the movement of the first locking part 11 is provided on the housing 20 of the first circuit breaker 2; the housing 30 of the second circuit breaker 3 is provided with a second through hole 300 for the second locking portion 14 to move. The first through hole 200 and the second through hole 300 are both kidney-shaped holes. The structure matched with the locking connecting rod on the circuit breaker shell is simple in structure, convenient to produce and manufacture and high in universality.
Further, the trip device of the single-pole circuit breaker includes a bimetal 26 and an electromagnetic trip 27, the electromagnetic trip 27 includes a striker in touch engagement with the latch 21, and the bimetal 26 is in touch engagement with the latch 21. When an electromagnetic trip condition is reached in the circuit of the circuit breaker, the striker of the electromagnetic trip 27 springs out and strikes against the catch 21 to drive the catch 21 to rotate and disengage the trip catch 25, and the operating mechanism of the circuit breaker is unlocked. When a thermal trip condition is reached in the circuit of the circuit breaker, the bimetal 26 bends, thereby touching the latch 6 to drive the latch 21 to rotate away from the trip 25, and the operating mechanism of the circuit breaker is unlocked. Specifically, the latch 21 of the first circuit breaker 2 is located between the bimetal 26 and the electromagnetic trip 27, the middle portion of the latch 21 is pivotally installed in the housing 20, and one end of the latch 21 is engaged with the striker of the electromagnetic trip 27 and the other end is engaged with the bimetal 26 and the first locking portion 11 of the locking link 1. The structure is simple, the layout is compact and reasonable, the mutual noninterference is avoided, the driving is fast, and the tripping time of the circuit breaker is short.
As shown in fig. 2, in the specific structure of the locking link according to the present invention, the first locking portion 11 and the second locking portion 14 are two bar structures protruding from the top surface and the bottom surface of the connecting portion, respectively, the structure is simple, the locking is convenient and reliable, and specifically, the two bar structures are parallel to each other, the first locking portion 11 is obliquely disposed on the connecting portion, and an included angle with the bottom surface of the connecting portion is α, the second locking portion 14 is obliquely disposed on the connecting portion, and an included angle with the top surface of the connecting portion is β, the angle α is the same as the angle β, and is set in a specific range of angles greater than 90 ° and less than 180 °, so that the locking is more convenient and reliable, the angle α and the angle β are preferably 120 °.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. A dual power supply control structure of a multi-pole circuit breaker is characterized in that: the multi-pole circuit breaker locking device comprises a locking connecting rod (1) arranged between two adjacent single-pole circuit breakers of the multi-pole circuit breaker, wherein the two adjacent single-pole circuit breakers are a first circuit breaker (2) and a second circuit breaker (3), the wire inlet end of the first circuit breaker (2) is connected with a main power supply, and the wire inlet end of the second circuit breaker (3) is connected with a standby power supply; the locking link (1) comprises a first locking part (11) and a second locking part (14) which are positioned at two ends, and a connecting part connected between the first locking part (11) and the second locking part (14), wherein the first locking part (11) of the locking link (1) is hooked on a lock catch (21) of a first circuit breaker (2), and the second locking part (14) of the locking link (1) is hooked on a contact support (22) of a second circuit breaker (3);
when the first circuit breaker (2) breaks down, the standby power supply is switched on by switching on the second circuit breaker (3), and meanwhile, the contact support (22) of the second circuit breaker (3) drives the second locking part (14) of the locking connecting rod (1) to act, so that the first locking part (11) of the locking connecting rod (1) pulls the lock catch (21) of the first circuit breaker (2), and the first circuit breaker (2) trips to cut off the main power supply;
the multi-pole circuit breaker further comprises a third circuit breaker (4), the third circuit breaker (4) is a single-pole circuit breaker assembled on one side of the second circuit breaker (3), the second circuit breaker (3) is positioned between the first circuit breaker (2) and the third circuit breaker (4), and the third circuit breaker (4) and the first circuit breaker (2) are connected to a main power supply in parallel; the quantity of locking connecting rod (1) is at least two, and one of them sets up between first circuit breaker (2) and second circuit breaker (3), and another setting is between second circuit breaker (3) and third circuit breaker (4), first locking portion (11) of locking connecting rod (1) between third circuit breaker (4) and second circuit breaker (3) cooperate with hasp (21) of second circuit breaker (3), and its second locking portion (14) cooperate with contact support (22) of third circuit breaker (4).
2. The dual power supply control structure of the multipole circuit breaker according to claim 1, characterized in that: the internal structure of the shell of the first circuit breaker (2) is the same as that of the second circuit breaker (3), and the shell comprises a handle (24), a lock catch (21) and a contact support (22) which are pivotally installed in the shell (20,30), wherein the handle (24) is in driving connection with the contact support (22) through a transmission assembly, and the lock catch (21) is in locking fit with a jump buckle (25) of the transmission assembly.
3. The dual power supply control structure of the multipole circuit breaker according to claim 2, characterized in that: a first through hole (200) used for the movement of the first locking part (11) is formed in the shell (20) of the first circuit breaker (2); and a second through hole (300) used for the movement of the second locking part (14) is formed in the shell (30) of the second circuit breaker (3).
4. The dual power supply control structure of the multipole circuit breaker according to claim 2, characterized in that: the lock catch (21) is provided with lock teeth matched with the jump buckle (25) in a locking mode, and one end of the jump buckle (25) can be buckled in the lock teeth of the lock catch (21).
5. The dual power supply control structure of the multipole circuit breaker according to claim 1, characterized in that: the trip device of the single-pole circuit breaker comprises a bimetallic strip (26) and an electromagnetic trip (27), wherein the electromagnetic trip (27) comprises a striker in touch fit with a lock catch (21), and the bimetallic strip (26) is in touch fit with the lock catch (21).
6. The dual power supply control structure of the multipole circuit breaker according to claim 5, wherein: the lock catch (21) of the first circuit breaker (2) is located between the bimetallic strip (26) and the electromagnetic release (27), the middle of the lock catch (21) is pivotally installed in the shell (20), one end of the lock catch (21) is matched with a firing pin of the electromagnetic release (27), and the other end of the lock catch is matched with the bimetallic strip (26) and the first locking portion (11) of the locking connecting rod (1).
7. The dual power supply control structure of the multipole circuit breaker according to claim 1, characterized in that: the first locking part (11) and the second locking part (14) are two strip-shaped structures which respectively protrude from the top surface and the bottom surface of the connecting part.
8. The dual power supply control structure of the multipole circuit breaker according to claim 7, wherein: the connecting portion include first connecting strip (12) and second connecting strip (13) of dislocation connection, the one end lateral wall of first connecting strip (12) is connected with the laminating of the one end lateral wall of second connecting strip (13), and the other end and the first locking portion (11) of first connecting strip (12) are connected, and the other end and the second locking portion (14) of second connecting strip (13) are connected.
9. The dual power supply control structure of the multipole circuit breaker according to claim 7, wherein the two bar-shaped structures are parallel to each other, the first locking portion (11) is obliquely disposed on the connection portion at an angle α with the bottom surface of the connection portion, the second locking portion (14) is obliquely disposed on the connection portion at an angle β with the top surface of the connection portion, and the angle α is the same as the angle β and is greater than 90 ° and less than 180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088538.6A CN108461331B (en) | 2017-02-17 | 2017-02-17 | Double-power-supply control structure of multi-pole circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088538.6A CN108461331B (en) | 2017-02-17 | 2017-02-17 | Double-power-supply control structure of multi-pole circuit breaker |
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| Publication Number | Publication Date |
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| CN108461331A CN108461331A (en) | 2018-08-28 |
| CN108461331B true CN108461331B (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710088538.6A Active CN108461331B (en) | 2017-02-17 | 2017-02-17 | Double-power-supply control structure of multi-pole circuit breaker |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545595B (en) * | 2019-01-10 | 2024-07-23 | 常熟开关制造有限公司(原常熟开关厂） | Locking device of dual-power transfer switch and dual-power transfer switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1150316A2 (en) * | 2000-04-27 | 2001-10-31 | Eaton Corporation | Mechanical interlock with overtravel compensation for coordinating operation of circuit breakers |
| CN201402756Y (en) * | 2009-04-29 | 2010-02-10 | 曾辉 | Double power supply interlocking type circuit breaker |
| CN102082048A (en) * | 2009-11-26 | 2011-06-01 | 无锡唯特电气技术有限公司 | Miniature circuit breaker with high breaking capacity |
| CN105895462A (en) * | 2016-06-12 | 2016-08-24 | 天津加美特电气设备有限公司 | Dual power supply changeover switch with mechanical tripping interlock function |
| CN106409624A (en) * | 2015-07-29 | 2017-02-15 | 嘉灵科技有限公司 | Double Pole Breaker with Tandem Arrangement |
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2017
- 2017-02-17 CN CN201710088538.6A patent/CN108461331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1150316A2 (en) * | 2000-04-27 | 2001-10-31 | Eaton Corporation | Mechanical interlock with overtravel compensation for coordinating operation of circuit breakers |
| CN201402756Y (en) * | 2009-04-29 | 2010-02-10 | 曾辉 | Double power supply interlocking type circuit breaker |
| CN102082048A (en) * | 2009-11-26 | 2011-06-01 | 无锡唯特电气技术有限公司 | Miniature circuit breaker with high breaking capacity |
| CN106409624A (en) * | 2015-07-29 | 2017-02-15 | 嘉灵科技有限公司 | Double Pole Breaker with Tandem Arrangement |
| CN105895462A (en) * | 2016-06-12 | 2016-08-24 | 天津加美特电气设备有限公司 | Dual power supply changeover switch with mechanical tripping interlock function |
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| CN108461331A (en) | 2018-08-28 |
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