CN211150473U - Instantaneous backup protection device of electronic circuit breaker - Google Patents
Instantaneous backup protection device of electronic circuit breaker Download PDFInfo
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- CN211150473U CN211150473U CN201922349439.6U CN201922349439U CN211150473U CN 211150473 U CN211150473 U CN 211150473U CN 201922349439 U CN201922349439 U CN 201922349439U CN 211150473 U CN211150473 U CN 211150473U
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- armature
- circuit breaker
- protection device
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- push rod
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Abstract
The utility model provides an instantaneous reserve protection device of electronic type circuit breaker, includes connection terminal (1), and static armature (2) fixed dress is in on connection terminal (1), the lower extreme of support (3) is fixed to be adorned on connection terminal (1), move armature (5) dress and can rotate its characterized in that around axle (4) on axle (4): the static armature (2) and the movable armature (5) form a magnetic flux loop, the conductor (6) is fixedly arranged on the wire holder (1), the first attraction face (201) of the static armature (2) and the second attraction face (502) of the movable armature (5) form the magnetic flux loop, and the second attraction face (502) extends out of the extension characteristic part (502 a); the straight plate surface (202) of the static armature (2) is attached to or parallel to and in clearance fit with the back surface (101) of the wire holder (1). The backup protection device can realize quick tripping of the circuit breaker after the electronic controller fails, reduces the space occupied by the backup protection device, accelerates the action time of the circuit breaker, increases the driving force for the traction rod, and improves the performance of the circuit breaker, thereby enhancing the protection function of the circuit breaker.
Description
Technical Field
The utility model belongs to the technical field of low-voltage switch, specifically say so and relate to an instantaneous reserve protection device of electronic type circuit breaker.
Background
A circuit breaker such as a molded case circuit breaker is a low-voltage electrical component, is mainly used in an industrial power distribution system, and plays a role in connecting and disconnecting a circuit. The electronic molded case circuit breaker can well protect overload and short circuit, is high in precision, multifunctional, communicable and intelligent, and is more and more widely applied. The conventional electronic molded case circuit breaker uses an electronic release to drive a mechanism of the circuit breaker to act, the electronic release triggers magnetic flux action through a circuit board, the action time is about thirty milliseconds, and when short-circuit fault occurs, the longer action time of the electronic release can lead the breaking time of the circuit breaker to be longer than that of a common thermomagnetic circuit breaker, and breaking failure can be caused. In order to solve the technical problem, a backup protection device is usually arranged to achieve the purpose that when the intelligent controller fails, the backup protection device pushes a draw bar of the circuit breaker so as to achieve tripping protection of the circuit breaker.
chinese patent Z L201720668993.9 discloses an instantaneous reserve protection device of electronic type circuit breaker, this reserve protection device install the lateral part at reclosing circuit breaker base and be located the rear of reclosing circuit breaker traction lever, it is including installing the split type framework on the base, split type framework includes frame and lower frame, rotate through the round pin axle between the frame from top to bottom and connect, but set up the circular telegram conductor in the framework of lower frame, form a pair of magnetism actuation surface between frame downside and the lower frame upside, connect the push rod at last frame top, the push rod top is towards the crooked formation flexion of traction lever direction, when intelligent controller lost effect, adorn torsion spring in the round pin axle, thereby promote the tripping operation protection that recloses the circuit breaker traction lever through this reserve protection device and realize the circuit breaker, provide reserve protection for electronic type circuit breaker, use safelyr.
SUMMERY OF THE UTILITY MODEL
The utility model aims at exactly being to the technical defect that above-mentioned current instantaneous reserve protection device of electronic type circuit breaker exists, providing an instantaneous reserve protection device of electronic type circuit breaker, can realizing the quick release of circuit breaker after the electronic control ware loses effect, reduced the space that reserve protection device occupy for the action time of circuit breaker has increaseed the drive power to the traction lever, has promoted the circuit breaker performance to the protect function of circuit breaker has been strengthened.
Technical scheme
In order to realize above-mentioned technical purpose, the utility model provides a pair of instantaneous reserve protection device of electronic type circuit breaker, including the connection terminal, quiet armature fixed mounting is in on the connection terminal, the lower extreme fixed mounting of support is in on the connection terminal, the both ends dress of axle is in the upper end of support moves armature dress and is in epaxial and can pivoting, its characterized in that:
The static armature and the movable armature form a magnetic flux loop, and the conductor is fixedly arranged on the wire holder and passes through the magnetic flux loop formed by the static armature and the movable armature;
The elastic element is sleeved on the shaft and connected with the movable armature, so that the movable armature can reset after being rotated under the action of a magnetic field force;
The movable armature is provided with a push rod which is linked with a traction rod of the circuit breaker, and the movable armature can push the traction rod to rotate through the push rod when rotating under the action of a magnetic field force;
The first attraction surface of the static armature and the second attraction surface of the movable armature form a magnetic flux loop, and the second attraction surface extends out of the extension characteristic part;
And the straight plate surface of the static armature iron is attached to or parallel to and in clearance fit with the back surface of the wire holder.
Furthermore, the rotating center of the movable armature is positioned in the range of 45 degrees at the left side and the right side under the rotating center of the draw bar, and the included angle of the initial position of the linkage of the push rod and the draw bar is an acute angle;
Setting the distance between the rotation center of the movable armature and the linkage starting position of the push rod and the traction rod as b1, the distance between the rotation center of the movable armature and the linkage process position of the push rod and the traction rod as b2, and the distance between the rotation center of the movable armature and the linkage ending position of the push rod and the traction rod as b3, wherein b1 is more than b2 and more than b 3;
And if the distance between the rotation center of the traction rod and the linkage starting position of the push rod and the traction rod is a1, the distance between the rotation center of the traction rod and the linkage position of the push rod and the traction rod in the linkage process is a2, and the distance between the rotation center of the traction rod and the linkage ending position of the push rod and the traction rod is a3, the ratio of a1 to a2 to a3 is greater.
preferably, the extension feature and the side arm of the movable armature form an L-shape.
Preferably, the wire holder is mounted on a base of the circuit breaker.
Further, the support comprises a left support and a right support, and the lower ends of the left support and the right support and the static armature are fixed on the wire holder together through screws.
Preferably, the elastic element is a spring or a leaf spring.
Further, a plurality of conductors are soldered in parallel to the wire holder.
Advantageous effects
The utility model provides a pair of electronic type circuit breaker instantaneous reserve protection device has at first increased the actuation face that moves armature to increase magnetic attraction, not only can realize the quick-release of circuit breaker after the electronic control ware loses effect, can reduce the space that reserve protection device occupy simultaneously, accelerated the action time of circuit breaker, whole device has increaseed the drive power to the traction lever, has promoted the circuit breaker performance, thereby has strengthened the protect function of circuit breaker.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment of the present invention installed on a circuit breaker.
Fig. 2 is a schematic structural diagram of the embodiment of the present invention installed on the base.
Fig. 3 is a schematic structural diagram of an embodiment of the present invention.
Fig. 4 is a schematic view of the assembly relationship of the bracket, the movable armature and the static armature in the embodiment of the invention.
Fig. 5 is a schematic structural diagram of a wire holder according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a static armature in an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a movable armature in the embodiment of the invention.
Fig. 8 is a schematic diagram of the position of the extension feature in an embodiment of the invention.
Fig. 9 is a schematic structural diagram of the left bracket in the embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a right bracket in an embodiment of the present invention.
Fig. 11 is a schematic structural view of a shaft in an embodiment of the present invention.
Fig. 12 is a schematic structural diagram of an elastic element in an embodiment of the present invention.
Fig. 13 is a schematic structural diagram of a drawbar in an embodiment of the present invention.
Fig. 14 is a schematic view showing the assembly relationship between the bracket and the static armature in the embodiment of the present invention.
Fig. 15 is a schematic diagram of the embodiment of the present invention in the linkage start position.
Fig. 16 is a schematic diagram of the position of the embodiment of the present invention in the linkage process.
Fig. 17 is a schematic view of the embodiment of the present invention in the linkage ending position.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Examples
The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that the drawings are not necessarily drawn to the same scale in order to clearly illustrate the structures of the various components of the embodiments of the present invention. Like reference numerals are used to denote like parts. Further, when the description is made with reference to the drawings, directional words such as "upper", "lower", "front", "rear", and the like are employed for convenience of description, and they do not constitute specific limitations on the structure of the features.
As shown in fig. 1,2 and 3, the instantaneous backup protection device for the electronic circuit breaker comprises a wire holder 1, wherein the wire holder 1 is installed on a base 9 of a circuit breaker T, a static armature 2 is fixedly installed on the wire holder 1, and a straight plate surface 202 of the static armature 2 is attached to or parallel to a back surface 101 of the wire holder 1 and is in clearance fit with the back surface to optimize the space volume occupied by the whole protection device. The lower end of the bracket 3 is fixedly arranged on the wire holder 1, as shown in the attached figures 3 and 11, two ends of a shaft 4 are arranged in a hole I3 a at the upper end of the bracket 3, and a movable armature 5 is arranged on the shaft 4 and can rotate around the shaft 4; specifically, as shown in fig. 4, 9, 10 and 14, the bracket 3 in this embodiment includes a left bracket 301 and a right bracket 302, and the lower ends of the left bracket 301 and the right bracket 302 are fixed to the wire holder 1 together with the static armature 2 by screws 10. Similarly, the left bracket 301 and the right bracket 302 and the static armature 2 can be integrally installed in the hole two 1a of the wire holder 1, and the function and purpose of the integral type or the split type are the same.
in the embodiment, as shown in figures 3 and 5, a plurality of conductors 6 are welded on the wire holder 1 in parallel, as shown in figures 3, 6,7 and 8, an attraction surface I201 of the static armature 2 and an attraction surface II 502 of the movable armature 5 form a magnetic flux loop, the attraction surface II 502 extends out of an extension characteristic part 502a, and the extension characteristic part 502a and a side arm 502b of the movable armature 5 form an L shape to further increase the attraction area, so that the generated magnetic field force is increased.
As shown in fig. 3 and 12, the elastic element 7 is sleeved on the shaft 4 and connected with the movable armature 5, so that the movable armature 5 can be reset after being rotated under the action of a magnetic field force to prepare for the next action process; in this embodiment, the elastic element 7 is a spring or a spring plate, and both ends of the elastic element abut against the movable armature 5, and the spring also abuts against the conductor 6 to provide a restoring force to the movable armature 5.
As shown in fig. 3 and 13, a push rod 501 is arranged on the movable armature 5 to be linked with a pull rod 8 of the circuit breaker, and the movable armature 5 can push the pull rod 8 to rotate through the push rod 501 when rotating under the action of a magnetic field force.
As shown in fig. 15,16 and 17, the rotation center N of the movable armature 5 is located at a position within 45 degree angle ranges on the left and right sides right below the rotation center of the drawbar 8, and an included angle c between the initial position of the linkage of the push rod 501 and the drawbar 8 is an acute angle; setting the distance between the rotating center N of the movable armature 5 and the linkage starting position of the push rod 501 and the traction rod 8 as b1, the distance between the rotating center N of the movable armature 5 and the linkage process position of the push rod 501 and the traction rod 8 as b2, and the distance between the rotating center N of the movable armature 5 and the linkage ending position of the push rod 501 and the traction rod 8 as b3, wherein b1 is more than b2 and less than b 3; and if the distance between the rotation center M of the traction rod 8 and the linkage starting position of the push rod 501 and the traction rod 8 is a1, the distance between the rotation center M of the traction rod 8 and the linkage process position of the push rod 501 and the traction rod 8 is a2, and the distance between the rotation center M of the traction rod 8 and the linkage ending position of the push rod 501 and the traction rod 8 is a3, the a1 is greater than a2 and greater than a 3.
In this embodiment, during the process of pushing the drawbar 8 to rotate from the start position to the end position, the region a of the push rod 501 contacts with the region E of the drawbar 8, the region B of the push rod 501 contacts with the region F of the drawbar 8, and the region G of the drawbar 8 contacts with the region C of the push rod 501. This contact provides the maximum torque at the initial stage of the linkage of the push rod 501 with the drawbar 8, so that the drawbar 8 is converted from the rest state to the motion state, and provides the maximum rotation stroke at the middle and later stages of the rotation, and the push mechanism is released.
the working principle of the embodiment is that the moment is a physical quantity for generating a rotating action on an object by force, and can be divided into moment of the force to a shaft and moment of the force to a point.
in the present embodiment, the moment M5 generated by the moving armature 5 is L5 × F5, and M5 depends on the magnitude of the electromagnetic attraction force generated by the electromagnet, and the electromagnetic attraction force generated by the electromagnet is fixed under the fixed condition, so the moment M5 of the moving armature 5 is also fixed under the fixed condition.
the frictional force that the traction rod 8 needs to overcome is also fixed under the fixed condition, and the moment M8 that the traction rod 8 needs to overcome is also fixed under the fixed condition, and M8 is L8 × F8.
In the circuit breaker mechanism, the moment M8 of the draw bar 8 is as large as possible in the initial state so as to overcome the static friction between the mechanical parts, and in the circuit breaker mechanism, the initial static friction is much larger than the dynamic friction after the draw bar 8 starts to rotate, and in the process, the draw bar 8 continuously rotates until the mechanism is unlocked, the circuit breaker T is tripped, and the draw bar 8 needs to have enough rotation stroke.
according to the above, in the present embodiment, as shown in fig. 15, the moving armature 5 is in the initial state of rotation, L5 is b, b < b, b is minimum, and F is maximum, and the moving armature 5 transmits the maximum pushing force F to the drawbar 8 due to the action and reaction of the moving armature 5 and the drawbar, at this time, L8 of the drawbar is a, a is a > a, and a is maximum, and the moment M of the drawbar 8 is maximum, so as to facilitate the transition of the drawbar 8 from the stationary state to the dynamic state, as shown in fig. 16, the moving armature 5 is in the middle state of rotation, L5 is b, b < b, b is medium, F is medium, and the moving armature 5 transmits the medium pushing force F to the drawbar, at this time, L8 of the drawbar is a, a > a is medium, so that the moment M of the drawbar 8 is medium, the drawbar 8 is already in the moving state, as shown in fig. 17, the moving armature 5 is in the final state of rotation, L5 is b, b < b, b > a, b is b, at this time, and b is maximum, and a is greater than 5, and at this time, the maximum the moving armature 8 is transmitted to the drawbar is capable of completing the trip of the transition to the maximum pulling of the drawbar, and the maximum pulling of the.
The embodiment of the instant backup protection device of the electronic circuit breaker of the present invention has been described above. The specific features of the instant backup protection device of the electronic circuit breaker of the present invention, such as shape, size and position, can be specifically designed by the action of the features disclosed above, and these designs can be realized by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention to achieve the aim of the invention.
Claims (7)
1. The utility model provides an instantaneous reserve protection device of electronic type circuit breaker, includes connection terminal (1), and quiet armature (2) fixed dress is in on connection terminal (1), the lower extreme of support (3) is fixed to be adorned on connection terminal (1), the both ends dress of axle (4) is in the upper end of support (3), move armature (5) dress and be in on axle (4) and can rotate its characterized in that around axle (4):
The static armature (2) and the movable armature (5) form a magnetic flux loop, and the conductor (6) is fixedly arranged on the wire holder (1) and passes through the magnetic flux loop formed by the static armature (2) and the movable armature (5);
The elastic element (7) is sleeved on the shaft (4) and connected with the movable armature (5) to enable the movable armature (5) to reset after rotating under the action of magnetic field force;
A push rod (501) is arranged on the movable armature (5) and is linked with a draw bar (8) of the circuit breaker, and the movable armature (5) can push the draw bar (8) to rotate through the push rod (501) when rotating under the action of a magnetic field force;
The attraction surface I (201) of the static armature (2) and the attraction surface II (502) of the movable armature (5) form a magnetic flux loop, and the attraction surface II (502) extends out of the extension characteristic part (502 a);
The straight plate surface (202) of the static armature (2) is attached to or parallel to and in clearance fit with the back surface (101) of the wire holder (1).
2. The transient back-up protection device for an electronic circuit breaker as claimed in claim 1, wherein: the rotating center (N) of the movable armature (5) is positioned in the 45-degree angle ranges of the left side and the right side under the rotating center of the traction rod (8), and the included angle (c) of the initial position of the linkage of the push rod (501) and the traction rod (8) is an acute angle;
Setting the distance between the rotating center (N) of the movable armature (5) and the linkage starting position of the push rod (501) and the traction rod (8) as b1, the distance between the rotating center (N) of the movable armature (5) and the position of the push rod (501) and the traction rod (8) in the linkage process as b2, and the distance between the rotating center (N) of the movable armature (5) and the linkage ending position of the push rod (501) and the traction rod (8) as b3, wherein b1 is more than b2 and more than b 3;
And if the distance between the rotation center (M) of the traction rod (8) and the linkage starting position of the push rod (501) and the traction rod (8) is a1, the distance between the rotation center (M) of the traction rod (8) and the linkage position of the push rod (501) and the traction rod (8) is a2, and the distance between the rotation center (M) of the traction rod (8) and the linkage ending position of the push rod (501) and the traction rod (8) is a3, the a1 is more than a2 and more than a 3.
3. the instantaneous backup protection device of an electronic circuit breaker according to claim 1, characterized in that the extension feature (502a) and the side arm (502b) of the moving armature (5) form an L-shape.
4. The transient back-up protection device for an electronic circuit breaker as claimed in claim 1, wherein: the wire holder (1) is mounted on a base (9) of the circuit breaker.
5. The transient back-up protection device for an electronic circuit breaker as claimed in claim 1, wherein: the support (3) comprises a left support (301) and a right support (302), and the lower ends of the left support (301) and the right support (302) are fixed on the wire holder (1) together with the static armature (2) through screws (10).
6. The transient back-up protection device for an electronic circuit breaker as claimed in claim 1, wherein: the elastic element (7) is a spring or a spring sheet.
7. The transient back-up protection device for an electronic circuit breaker as claimed in claim 1, wherein: a plurality of conductors (6) are welded on the wire holder (1) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922349439.6U CN211150473U (en) | 2019-12-24 | 2019-12-24 | Instantaneous backup protection device of electronic circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922349439.6U CN211150473U (en) | 2019-12-24 | 2019-12-24 | Instantaneous backup protection device of electronic circuit breaker |
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| Publication Number | Publication Date |
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| CN211150473U true CN211150473U (en) | 2020-07-31 |
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| CN201922349439.6U Active CN211150473U (en) | 2019-12-24 | 2019-12-24 | Instantaneous backup protection device of electronic circuit breaker |
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| CN (1) | CN211150473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113035656A (en) * | 2019-12-24 | 2021-06-25 | 上海良信电器股份有限公司 | Instantaneous backup protection device of electronic circuit breaker |
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2019
- 2019-12-24 CN CN201922349439.6U patent/CN211150473U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113035656A (en) * | 2019-12-24 | 2021-06-25 | 上海良信电器股份有限公司 | Instantaneous backup protection device of electronic circuit breaker |
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