CN105513916A - Time-delay operation mechanism adopted in circuit breaker and circuit breaker - Google Patents
Time-delay operation mechanism adopted in circuit breaker and circuit breaker Download PDFInfo
- Publication number
- CN105513916A CN105513916A CN201610040783.5A CN201610040783A CN105513916A CN 105513916 A CN105513916 A CN 105513916A CN 201610040783 A CN201610040783 A CN 201610040783A CN 105513916 A CN105513916 A CN 105513916A
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- Prior art keywords
- iron core
- circuit breaker
- dynamic iron
- action mechanism
- dynamic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
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Abstract
The invention discloses a time-delay operation mechanism adopted in a circuit breaker and the circuit breaker. The time-delay operation mechanism comprises a static iron core, at least two movable iron cores, at least two counter-force springs, an electromagnetic coil and an ejector rod, wherein the movable iron cores and the static iron core are located on the same horizontal axis, the counter-force springs are located between the static iron core and the movable iron core adjacent to the static iron core and between the movable iron cores, the electromagnetic coil surrounds the static iron core and at least one of the two movable iron cores, and the ejector rod penetrates through the static iron core and the two movable iron cores. When the electromagnetic coil is powered on, magnetic power drive generated by loop current in the electromagnetic coil drives the movable iron core to overcome resistance generated by spring force of the counter-force springs to move towards the static iron core and therefore the ejector rod is driven to move. At least one of the counter-force springs is different from spring force generated by other counter-force springs. The time-delay operation mechanism can achieve selective protection of stage difference coordination, and the phenomenon that the time-delay operation mechanism and the lower-stage circuit breaker act at the same time when short-circuit current appears is avoided.
Description
Technical field
The present invention relates to circuit field, particularly relate to and be a kind ofly used in deferred action mechanism in circuit breaker and circuit breaker.
Background technology
Circuit breaker in Terminal Power Distribution System mainly for the protection of the purposes of wire or equipment, namely when break down in Terminal Power Distribution System electric current time, circuit breaker can cut off this fault current in time, spreads to stop the accident causing this fault current.At present, user generally arranges circuit breaker multiple levels protection.General miniature circuit breaker only has overload long delay and short circuit instantaneous protection two kinds of protective features, the failed shorted electric current occurred when load-side exceedes the drop-away value of subordinate's circuit breaker, when also exceeding the drop-away value of higher level's circuit breaker, if higher level's circuit breaker does not have short circuit short time-delay defencive function, then there will be higher level's circuit breaker and subordinate's circuit breaker trips simultaneously, or overstep tripping (namely, when subordinate's circuit breaker not yet trips, higher level's circuit breaker trips) situation, make healthy circuit power-off, fault coverage is caused to expand, and then cause unnecessary, larger economic loss.If higher level's circuit breaker has short circuit short time-delay defencive function, then can avoid occurring that higher level's circuit breaker and subordinate's circuit breaker trip simultaneously or the situation of overstep tripping occurs, thus the reliability and security of the expansion of Accident prevention, raising power supply.
Now, user generally uses the miniature circuit breaker (SMCB) of band selective protection as higher level's circuit breaker to realize selective protection, no matter but be the shortcoming that electronic type or mechanical type SMCB exist that volume is large, cost is high.
Summary of the invention
One or more problems in view of the above, what the invention provides a kind of novelty is used in deferred action mechanism in circuit breaker and circuit breaker.
The deferred action mechanism be used in circuit breaker according to the embodiment of the present invention comprises: static iron core; At least two dynamic iron cores, are on same level axis with static iron core; At least two reaction springs, lay respectively between static iron core and the dynamic iron core be adjacent and between at least two dynamic iron cores; Solenoid, is looped around the outside of at least one in static iron core and at least two dynamic iron cores; Push rod, run through static iron core and at least two dynamic iron cores settings, wherein when the solenoid is activated, the resistance that the spring force that the magnetomotive that loop current in solenoid produces drives at least two dynamic iron cores to overcome at least two reaction springs produces is moving towards the direction of static iron core, thus driving push rod motion, at least one reaction spring wherein at least two reaction springs is different from the spring force that other reaction springs produce.
The deferred action mechanism be used in circuit breaker according to the embodiment of the present invention also comprises: sleeve pipe, wherein at least two dynamic iron cores and at least two reaction springs are positioned at sleeve pipe, and solenoid is looped around the outside of sleeve pipe, wherein, this sleeve pipe is made up of the material with insulating capacity.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, at least two dynamic iron cores comprise the first dynamic iron core and the second dynamic iron core, first dynamic iron core is between static iron core and the second dynamic iron core, and the spring force of first dynamic the first reaction spring between iron core and static iron core is less than the spring force of the second reaction spring between the first dynamic iron core and the second dynamic iron core.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, under the magnetomotive driving of the loop current generation of the first dynamic iron core in solenoid when moving to extreme position towards the direction of static iron core, push rod does not arrive target location.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, under the magnetomotive driving of the loop current generation of the first dynamic iron core in solenoid when moving to extreme position towards the direction of static iron core, motion is continued, until push rod arrives target location under the magnetomotive driving that the loop current of the second dynamic iron core in inertia and/or solenoid produces.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, at the second dynamic iron core in the process of moving towards the direction of static iron core, the increase speed of the resistance of the spring force generation of the second reaction spring is greater than the magnetomotive increase speed of the loop current generation in solenoid.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, when the loop current in solenoid exceed adjust operating current threshold values time, push rod arrives described target location.
According in the deferred action mechanism being used in circuit breaker of the embodiment of the present invention, the first dynamic iron core have the groove or the hole that do not hinder the second dynamic iron core to continue motion.
According to the circuit breaker of the embodiment of the present invention, comprise deferred action mechanism as above.
According to the deferred action mechanism be used in circuit breaker of the embodiment of the present invention; structure is simple; cost is low, and can be realized the selective protection of Graded coordination by the deferred action of tripping mechanism, thus when avoiding occurring short circuit current and the action simultaneously of subordinate circuit breaker.
Accompanying drawing explanation
The following accompanying drawing of the application in this as a application's part for understanding the application.Execution mode shown in accompanying drawing and description thereof are used for explaining principle of the present invention.In the accompanying drawings:
Fig. 1 is the partial sectional view being used in the deferred action mechanism in circuit breaker according to the embodiment of the present invention; And
Fig. 2 is the partial enlarged drawing being used in the deferred action mechanism in circuit breaker according to the embodiment of the present invention.
Embodiment
The characteristic sum exemplary embodiment of various aspects of the present invention will be described in detail below.In the following detailed description, propose many details, to provide complete understanding of the present invention.But, it will be apparent to those skilled in the art that the present invention can implement when not needing some details in these details.Below the description of embodiment is only used to by illustrating example of the present invention to provide to better understanding of the present invention.Any concrete configuration that the present invention proposes below being never limited to, but cover any amendment of element and parts, replacement and improvement under the premise of without departing from the spirit of the present invention.In the the accompanying drawings and the following description, known structure and technology are not shown, to avoid causing the present invention unnecessary fuzzy.
In order to avoid occurring that the superior and the subordinate's circuit breaker trips or the situation of overstep tripping thus the expansion of Accident prevention simultaneously, circuit breaker should have short circuit time delay tripping function to realize the selective protection of Graded coordination.For this reason, the present invention proposes a kind of deferred action mechanism be used in circuit breaker of novelty.Below in conjunction with Fig. 1 and Fig. 2, describe the deferred action mechanism be used in circuit breaker according to the embodiment of the present invention in detail.
Fig. 1 shows the deferred action mechanism be used in circuit breaker according to the embodiment of the present invention.As shown in Figure 1, this deferred action mechanism 100 be used in circuit breaker comprises solenoid 101, the dynamic iron core of static iron core 102, two 103 and 104, two reaction springs 105 and 106 and runs through the push rod 107 of static iron core 102 and two dynamic iron core 103,104 settings.
In the present embodiment, solenoid 101 can be solenoid structure form, is looped around the outside of at least one in static iron core 102 and two dynamic iron cores 103,104; Two dynamic iron cores 103,104 and static iron core 102 are on same level axis, and dynamic iron core 103 is between static iron core 102 and dynamic iron core 104; Reaction spring 105 is between static iron core 102 and dynamic iron core 103, and reaction spring 106 is between dynamic iron core 103 and 104; The spring force that reaction spring 105 produces makes the magnetic gap between dynamic iron core 103 and static iron core 102 be kept, the spring force that reaction spring 106 produces makes the magnetic gap between dynamic iron core 103 and 104 be kept, and the spring force that reaction spring 105 produces is less than the spring force that reaction spring 106 produces.
When solenoid 101 is energized, the resistance that the spring force that the magnetomotive that loop current in solenoid 101 produces drives two dynamic iron cores 103 and 104 to overcome two reaction springs 105 and 106 produces is moving towards the direction of static iron core 102, thus drives push rod 107 to move.
Here, because reaction spring 105 is different with the spring force of 106, so: 1) when the loop current in solenoid 101 to increase but when not yet increasing to the resistance that spring force that its actuating force produced to be greater than reaction spring 105 and 106 any one produces, two dynamic iron cores 103 and 104 all cannot move gradually from zero; 2) when the loop current in solenoid 101 increase to its produce actuating force be greater than reaction spring 105 spring force produce resistance and be less than reaction spring 106 spring force produce resistance time, the move under influence of the actuating force that the loop current of dynamic iron core 103 in solenoid 101 produces, dynamic iron core 104 moves under the drive of dynamic iron core 103, and then push rod 107 is moved under the drive of dynamic both iron cores 103 and 104.
It will be understood by those skilled in the art that, can comprise according to the deferred action mechanism be used in circuit breaker of the embodiment of the present invention two or more reaction spring that two or more moves iron core and be equipped with dynamic iron core, and in this two or more reaction spring, have at least a reaction spring different from the spring force that other reaction springs produce.Like this, the actuating force produced due to the loop current in solenoid 101 to move the precedence relationship in the driving life period of iron core to two or more, so push rod 107 time delay can be made to arrive target location.
In the embodiment shown in Figure 2, when moving to extreme position (such as towards the direction of static iron core 102 under the magnetomotive driving that the loop current of dynamic iron core 103 in solenoid 101 produces, the extreme position that reaction spring 105 can not be further compressed or dynamic iron core 103 are withstood by static iron core 102 thus cannot continue at the extreme position moved towards the direction of static iron core 102) time, push rod 107 does not arrive target location; Under the magnetomotive driving of the loop current generation of dynamic iron core 103 in solenoid 101 when moving to extreme position towards the direction of static iron core 102, motion is continued under the magnetomotive that the loop current of dynamic iron core 104 in inertia, solenoid 101 produces or the effect both them, until till driving push rod 107 to arrive target location (such as, making the position of de-mouth mechanism 109 action).At dynamic iron core 104 in the process of moving towards the direction of static iron core 102, the increase speed of the resistance of the spring force generation of reaction spring 106 is greater than the magnetomotive increase speed of the loop current generation in solenoid 101, so just make the acceleration of dynamic iron core 104 be negative value, thus the responsiveness of dynamic iron core 104 can be delayed.
In the circuit breaker comprising deferred action mechanism 100, not only there is in existing circuit breaker the magnetic gap between dynamic iron core 103 and static iron core 102 existed, and the magnetic gap existed in existing circuit breaker between still non-existent dynamic iron core 103 and dynamic iron core 104, therefore the move distance that existing circuit breaker increases push rod 107 is compared, be delayed the action of tripping mechanism 109, make the fault current in circuit breaker cut-off after certain time-delay.In the present embodiment, when the loop current in solenoid 101 exceed adjust operating current threshold value time, push rod 107 arrives target location (that is, arrive make tripping mechanism 109 action thus the position making fault current in circuit breaker cut-off).
In the embodiment shown in Figure 2, the deferred action mechanism 100 be used in circuit breaker can also comprise sleeve pipe 108, and wherein, sleeve pipe 108 is made up of the material with insulating capacity.Particularly, dynamic iron core 103 and 104 and two reaction springs 105 and 106 are positioned at sleeve pipe 108, and solenoid 101 is looped around on the outer surface of sleeve pipe 108.Here, sleeve pipe 108 not only plays the effect making to insulate between iron core 103 and 104 and solenoid 101, and dynamic iron core 103 and dynamic iron core 104 can also be avoided to swing excessive in radial direction thus can improve the reliability of the deferred action mechanism 100 be used in circuit breaker simultaneously.
In order to understand better and the deferred action mechanism that be used in circuit breaker of application according to the embodiment of the present invention, further the deferred action mechanism 100 be used in circuit breaker shown in Fig. 1 is described in detail below in conjunction with Fig. 2.
Fig. 2 shows the partial enlarged drawing being used in the deferred action mechanism 100 in circuit breaker according to the embodiment of the present invention.As shown in Figure 2, the outside dimension of reaction spring 105 is more smaller than the internal diameter size of sleeve pipe 108, internal diameter size is more bigger than the outside dimension of the boss 111 of static iron core 102 and the boss 112 of dynamic iron core 103, between static iron core 102 and dynamic iron core 103 and two ends are enclosed within the boss 111 of static iron core 102 and the boss 112 of dynamic iron core 103; Vestibule 113 and vestibule 114 is provided with in dynamic iron core 103; Push rod 107 is Step Shaft shape, and the external diameter of the thick axle 115 of push rod 107 is larger and less than the internal diameter of the vestibule 116 of static iron core 102 than the internal diameter size of the vestibule 114 of dynamic iron core 103; Vestibule 117 is provided with in dynamic iron core 104; Reaction spring 106 is enclosed within the thin axle 118 of push rod 107, and the thin axle 118 of push rod 107 passes the vestibule 113,114 vestibule 117 stretching into dynamic iron core 104 that move iron core 103; Circuit breaker base being provided with limit features 119, making iron core 104 have the position determined, making the gap of static iron core 102 and dynamic iron core 103, dynamic gap between iron core 103 and dynamic iron core 104 have the predetermined value determined by regulating reaction spring 105,106.
The resistance that the spring force that the magnetomotive that loop current in solenoid 101 produces makes dynamic iron core 103 overcome reaction spring 105 when the resistance that the spring force being greater than reaction spring 105 produces produces moves near the direction of static iron core 102, and dynamic iron core 104 moves to the direction near static iron core 102 in the lump with dynamic iron core 103; When dynamic iron core 103 reaches the limit of position, tripping mechanism does not have action, and dynamic have enough magnetic gaps between iron core 103 and dynamic iron core 104.
When push rod 107 be not driven move to trip positions time, the magnetomotive increase speed that the spring force of reaction spring 106 gives the loop current generation in the increase speed ratio solenoid 101 of the resistance of dynamic iron core 104 is bigger, the acceleration of dynamic iron core 104 is made to be negative value, delay the responsiveness of dynamic iron core 104, the resistance that the spring force overcoming reaction spring 106 under the magnetomotive acting in conjunction that the loop current that the continuation of dynamic iron core 104 in inertia and solenoid 101 increases produces produces continues motion, until make tripping mechanism action after driving push rod 107 to arrive trip positions, thus realize the function of mechanism's delayed releasing.
In sum; as can be seen from Fig. 1 and Fig. 2; according to the deferred action mechanism be used in circuit breaker that the embodiment of the present invention provides; the Graded coordination selective protection function within the scope of certain short-circuit current can be realized; avoid healthy circuit power-off; thus unnecessary economic loss can be avoided, improve the reliability and security of power supply.
Below the present invention is described with reference to specific embodiments of the invention, but those skilled in the art all understand, various amendment, combination and change can be carried out to these specific embodiments, and the spirit and scope of the present invention by claims or its equivalents can not be departed from.In addition, any signal arrows in accompanying drawing should be considered to be only exemplary, instead of restrictive, indicates unless otherwise specifically.When term be also contemplated as the ability of separation or combination is not known time, the combination of assembly or step also will be considered to describe.
Claims (10)
1. be used in the deferred action mechanism in circuit breaker, comprise:
Static iron core;
At least two dynamic iron cores, are on same level axis with described static iron core;
At least two reaction springs, lay respectively between described static iron core and the dynamic iron core be adjacent and between described at least two dynamic iron cores;
Solenoid, is looped around the outside of at least one in described static iron core and described at least two dynamic iron cores;
Push rod, runs through described static iron core and described at least two dynamic iron cores are arranged, wherein
When described solenoid energising, the resistance that described at least two dynamic iron cores described in the magnetomotive that loop current in described solenoid produces drives overcome, the spring force of at least two reaction springs produces is moving towards the direction of described static iron core, thus driving described push rod to move, at least one reaction spring in wherein said at least two reaction springs is different from the spring force that other reaction springs produce.
2. be used in the deferred action mechanism in circuit breaker as claimed in claim 1, it is characterized in that, also comprise:
Sleeve pipe, wherein said at least two dynamic iron cores and described at least two reaction springs are positioned at described sleeve pipe, and described solenoid is looped around the outside of described sleeve pipe.
3. be used in the deferred action mechanism in circuit breaker as claimed in claim 2, it is characterized in that, described sleeve pipe is made up of the material with insulating capacity.
4. be used in the deferred action mechanism in circuit breaker as claimed any one in claims 1 to 3, it is characterized in that, described at least two dynamic iron cores comprise the first dynamic iron core and the second dynamic iron core, described first dynamic iron core is between described static iron core and the described second dynamic iron core, and the spring force of described first dynamic the first reaction spring between iron core and described static iron core is less than the spring force of the second reaction spring between the described first dynamic iron core and the described second dynamic iron core.
5. be used in the deferred action mechanism in circuit breaker as claimed in claim 4, it is characterized in that, under the magnetomotive driving of the loop current generation of the described first dynamic iron core in described solenoid when moving to extreme position towards the direction of described static iron core, described push rod does not arrive target location.
6. be used in the deferred action mechanism in circuit breaker as claimed in claim 5, it is characterized in that, under the magnetomotive driving of the loop current generation of the described first dynamic iron core in described solenoid when moving to extreme position towards the direction of described static iron core, motion is continued, until described push rod arrives described target location under the magnetomotive driving that the loop current of the described second dynamic iron core in inertia and/or described solenoid produces.
7. be used in the deferred action mechanism in circuit breaker as claimed in claim 6, it is characterized in that, at the described second dynamic iron core in the process of moving towards the direction of described static iron core, the increase speed of the resistance of the spring force generation of described second reaction spring is greater than the magnetomotive increase speed of the loop current generation in described solenoid.
8. be used in the deferred action mechanism in circuit breaker as claimed in claim 6, it is characterized in that, when the loop current in described solenoid exceed adjust operating current threshold values time, described push rod arrives described target location.
9. be used in the deferred action mechanism in circuit breaker as claimed in claim 4, it is characterized in that, the described first dynamic iron core has the groove or the hole that do not hinder the described second dynamic iron core to continue motion.
10. a circuit breaker, comprises the deferred action mechanism according to any one of claim 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610040783.5A CN105513916B (en) | 2016-01-21 | 2016-01-21 | Deferred action mechanism and breaker in breaker |
| PCT/CN2016/104531 WO2017124814A1 (en) | 2016-01-21 | 2016-11-04 | Time-delay operation mechanism used in circuit breaker, and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610040783.5A CN105513916B (en) | 2016-01-21 | 2016-01-21 | Deferred action mechanism and breaker in breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105513916A true CN105513916A (en) | 2016-04-20 |
| CN105513916B CN105513916B (en) | 2018-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610040783.5A Active CN105513916B (en) | 2016-01-21 | 2016-01-21 | Deferred action mechanism and breaker in breaker |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105513916B (en) |
| WO (1) | WO2017124814A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106952794A (en) * | 2017-05-16 | 2017-07-14 | 厦门大恒科技有限公司 | Time delay mechanism and circuit breaker |
| WO2017124814A1 (en) * | 2016-01-21 | 2017-07-27 | 首瑞（天津）电气设备有限公司 | Time-delay operation mechanism used in circuit breaker, and circuit breaker |
| CN108231501A (en) * | 2018-01-12 | 2018-06-29 | 厦门大恒科技有限公司 | Hydraulic movable iron core electromagnet and circuit breaker |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109087833A (en) * | 2018-08-31 | 2018-12-25 | 宁波耀华电气科技有限责任公司 | A kind of Monostable permanent magnetism operating mechanism |
| CN110137044B (en) * | 2019-05-30 | 2024-02-02 | 天津加美特电气股份有限公司 | Intelligent circuit breaker with normally open and normally closed functions |
| CN114496602B (en) * | 2022-02-18 | 2024-01-09 | 薛京 | Circuit breaker operating mechanism |
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- 2016-11-04 WO PCT/CN2016/104531 patent/WO2017124814A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017124814A1 (en) * | 2016-01-21 | 2017-07-27 | 首瑞（天津）电气设备有限公司 | Time-delay operation mechanism used in circuit breaker, and circuit breaker |
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| CN106952794B (en) * | 2017-05-16 | 2019-03-22 | 厦门大恒科技有限公司 | Time delay mechanism and circuit breaker |
| CN108231501A (en) * | 2018-01-12 | 2018-06-29 | 厦门大恒科技有限公司 | Hydraulic movable iron core electromagnet and circuit breaker |
| CN108231501B (en) * | 2018-01-12 | 2024-02-27 | 厦门大恒科技有限公司 | Hydraulic movable iron core electromagnet and circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105513916B (en) | 2018-06-29 |
| WO2017124814A1 (en) | 2017-07-27 |
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