CN104505316B - The overcurrent protection of chopper - Google Patents
The overcurrent protection of chopper Download PDFInfo
- Publication number
- CN104505316B CN104505316B CN201510018107.3A CN201510018107A CN104505316B CN 104505316 B CN104505316 B CN 104505316B CN 201510018107 A CN201510018107 A CN 201510018107A CN 104505316 B CN104505316 B CN 104505316B
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- CN
- China
- Prior art keywords
- shell fragment
- iron core
- push rod
- overcurrent protection
- yoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H01H71/24—Electromagnetic mechanisms
-
- 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
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention discloses a kind of overcurrent protection of chopper, it includes the electromagnetic system for cooperating and operating mechanism, the electromagnetic system includes static contact, the end of incoming cables electrically connected with the static contact, the coil being serially connected between the end of incoming cables and affiliated static contact, and the static iron core and dynamic iron core with coil electromagnetism cooperation, the operating mechanism includes the moving contact being engaged with the static contact, and the leading-out terminal electrically connected with the moving contact, be fixed with the dynamic iron core can with the dynamic iron core make simultaneously it is close/away from the operating mechanism, and the push rod being linked with operating mechanism, a shell fragment is connected with the push rod, and two opposite ends of the shell fragment are relatively fixed with the static contact.The speed of action and stability of chopper when the present invention can improve overcurrent protection.
Description
Technical field
The present invention relates to field of circuit breakers, and in particular to a kind of overcurrent protection of chopper.
Background technology
Traditional chopper overcurrent protection, is provided with pressure between the static iron core and dynamic iron core in its electromagnetic system
Spring, when combined floodgate is powered and abnormal failure high current occurs, magnetizing the dynamic and static iron core in electromagnetic system by high current makes its gram
The stress moment for taking the stage clip is clapped and is closed, and push rod is ejected and promotes lock to overcome the stress of torsion spring to make tripping thread off, now
Dynamic and static contact is separated under the pulling force of extension spring and completes overcurrent protection separating brake by operating mechanism.After the completion of operating mechanism can be first
Reset under torsion spring, the stress of the second button spring, be that second combined floodgate is prepared.
However, the electromagnetic system of this chopper overcurrent protection, is by the magnetized dynamic and static iron core of fault current
It is allowed to produce clap and makes a concerted effort to overcome linear spring force, and persistently increases or maintain fault current to promote push rod ejection to force behaviour
Make mechanical unlocking, realize overcurrent protection action；But due to displacement of the stage clip in working range and force value linear proportional relation,
Therefore the overcurrent protection working value of such infrastructure product is typically a larger scope of width (such as：5 times -10 times specified
Electric current or 10 times ± 20%), and dynamic iron core, the wild effect of push rod shake are there is also when products application is exchanged (be
As alternating current has positive and negative alternating and there is the phenomenon of current zero-crossing point, and can rapidly significantly in current over-zero
Weaken its bat for magnetizing and then reducing between the two to iron core to make a concerted effort, now iron core and push rod can be returned under the playback power of spring
Return；Gradually recover bat again to make a concerted effort when electric current starts increase again in alternating cycles, recover to clap and close position, so in alternation electricity
The shake produced in stream).
The content of the invention
The present invention seeks to：For the problems referred to above, there is provided a kind of overcurrent protection of chopper, to improve overcurrent
The speed of action and stability of chopper during protection.
The technical scheme is that：A kind of overcurrent protection of chopper, including the electromagnetic system for cooperating
And operating mechanism, the electromagnetic system includes static contact and the end of incoming cables that the static contact is electrically connected, be serially connected in the end of incoming cables and
Coil between affiliated static contact and the static iron core coordinated with the coil electromagnetism and dynamic iron core, the operating mechanism include with
Moving contact and the leading-out terminal electrically connected with the moving contact that the static contact is engaged, being fixed with the dynamic iron core can
Make close/push rod for being linked away from the operating mechanism and with operating mechanism simultaneously with the dynamic iron core, connect on the push rod
There is a shell fragment, and two opposite ends of the shell fragment are relatively fixed with the static contact.
The present invention on the basis of above-mentioned technical proposal, also including following preferred version：
Also include yoke and the shrouding being fixed in the yoke, the static contact is fixed on the shrouding, the magnetic
Sleeve is fixed with yoke, the static iron core is fixed in described sleeve pipe, the dynamic iron core is axially slidably arranged in described
In sleeve pipe, the coil is wrapped in outside described sleeve pipe and is located inside the yoke, and the shell fragment is fixed in the yoke, and
The dynamic iron core, static iron core, shell fragment, shrouding and static contact are sequentially arranged along the direction near the operating mechanism.
Coaxially arranged mistake rod aperture is provided with the static iron core, shrouding and static contact, the push rod slides and is located in this
Three are crossed in rod aperture.
The shell fragment and shrouding are bolted in the yoke.
The shell fragment is ellipsoidal structure.
The pilot hole being slidably located on the push rod is formed with the middle part of the shell fragment, on the push rod, position is fixedly installed
In the shell fragment away from the push rod flange of that side of operating mechanism and be located at the shell fragment near the operating mechanism that
The solid boss of side.
The push rod flange is structure as a whole with the push rod, and the solid boss is detachably connected with the push rod, and
Axial location of the solid boss on push rod is adjustable.
The upper and lower ends of the shell fragment long axis direction are formed respectively with a connecting hole, and the bolt passes through the connecting hole and screws in
In the yoke, so as to shell fragment is fixed in the yoke.
It is formed with the shell fragment for adjusting several holes of the shell fragment elastic force.
Solid boss is also equipped with the shell fragment and shrouding.
It is an advantage of the invention that：
Electromagnetic system in this overcurrent protection of the present invention is allowed to produce by the magnetized dynamic and static iron core of fault current
Raw bat makes a concerted effort to overcome the shell fragment with non-linear force, and when fault current increases to setting value, dynamic iron core can promote push rod and bullet
Piece is moved to shrouding, and when shell fragment is contacted with shrouding, shell fragment is already close to mistake dead-centre position (i.e. the elastic force of shell fragment close to zero)；
Do so can significantly lower or eliminate which first and improve its stability using the jitter phenomenon for being under alternating current, secondly shell fragment
Elastic force its elastic force will be reduced rapidly (close to zero) once being overcome triggering, this characteristic by improve triggering rear push-rod push away
It is dynamic to latch the reliability for forcing operating mechanism action.Because being changed to the scheme of shell fragment design by original action from spring design
Value control mode is changed into switching value to control, and when electric current increases to design load, the structure will be by the rapid elastic force that weakens come between
Connect the bat and power for lifting iron core.Therefore, the structure when fault current meets operation condition or protective current value its triggering after
The more original structure of process increased the effect of boosting push rod, so as to further increase the speed of product overcurrent protection action
And reliability.
This patent design can be used in the miniature circuit breaker with selective protection, can be reduced by design described in this patent
The shake of dynamic iron core, improves stability when major loop contact terminal is backed down and maintains current limliting.And then shake to reduce from deduction and exemption contact
Main contact is restriked, and improves product service life, and more longlasting improves chopper and electric power netting safe running cycle.
Description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is the overall structure diagram of this chopper overcurrent protection of the invention；
Fig. 2 is the partial enlarged drawing of this chopper overcurrent protection of the invention；
Structural representations of the Fig. 3 for shell fragment；
Wherein：A- electromagnetic systems, B- operating mechanisms, 1- moving contacts, 2- static contacts, 3- ends of incoming cables, 4- leading-out terminals, 5- lines
Circle, 6- static iron cores, 7- dynamic iron cores, 8- push rods, 9- shell fragments, 10- yokes, 11- sleeve pipes, the solid boss of 12-, 13- bolts, 14- envelopes
Plate, 15- handles, 16- fix rotary shaft, 17- levers, 18- locks, 19- trippings, 20- moving rotary axles, 21- supports, 22- drawings
Spring, the first torsion springs of 23-, the second torsion springs of 24-, 25- flexible circuit conductors.
Specific embodiment
Fig. 1～Fig. 3 shows a specific embodiment of this chopper overcurrent protection of the invention, disconnected with tradition
Road device overcurrent protection identical is that the protection device also includes electromagnetic system A and the operating mechanism B for cooperating, its
Middle electromagnetic system A is included static contact 2, the end of incoming cables 3 electrically connected with the static contact 2, is serially connected in the end of incoming cables 3 and affiliated stationary contact
Coil 5 between 2, and static iron core 6 and dynamic iron core 7 with 5 electrical cooperation of coil.The operating mechanism B structure and biography
System structure is as good as, and it is by moving contact 1, the fixed rotary shaft 16 of 15, two, handle, lever 17, lock 18, tripping 19, moving rotary
Axle 20, support 21, extension spring 22, leading-out terminal 4, the first torsion spring 23, second torsion spring 24 etc. are constituted, wherein moving contact 1 and the stationary contact
2 are engaged, and leading-out terminal 4 is electrically connected with moving contact 1 by flexible circuit conductor 25.
The key improvements of the present embodiment are：It is fixed with the dynamic iron core 7 and can makees close/remote simultaneously with the dynamic iron core
The push rod 8 being linked from the operating mechanism B and with operating mechanism B, is connected with a shell fragment 9, and the shell fragment 9 on the push rod 8
Two opposite ends be relatively fixed with the static contact 2.
Also, this chopper overcurrent protection of the present embodiment also includes yoke 10 and is fixed in the yoke 10
Shrouding 14, the static contact 2 is fixed on the shrouding 14, and the shell fragment 9 is fixed in the yoke 10, the yoke
Sleeve 11 is fixed with 10, the static iron core 6 is fixed in described sleeve pipe 11, and the dynamic iron core 7 is axially slidably arranged
In described sleeve pipe 11, the coil 5 is wrapped in outside described sleeve pipe 11 and is located inside the yoke 10, and the dynamic iron core 7,
Static iron core 6, shell fragment 9, shrouding 14 and static contact 2 are sequentially arranged along the direction near the operating mechanism B.
The push rod 8 being connected to convey dynamic iron core 7 can stretch to the operating mechanism B and be linked with operating mechanism B,
This example is provided with coaxially arranged mistake rod aperture on the static iron core 6, shrouding 14 and static contact 2, and the push rod 8 slides and is located in
These three are crossed in rod aperture.
Electromagnetic system A is allowed to produce bat by the magnetized dynamic iron core 7 of fault current, static iron core 6 and makes a concerted effort to overcome with non-
The shell fragment 9 of linear force, moves dynamic iron core 7 and can promote 9 (the generation bullet of shell fragment 9 of push rod 8 and shell fragment when fault current increases to setting value
Property deformation) move to shrouding 14, when shell fragment 9 is contacted with shrouding 14, shell fragment 14 is already close to mistake dead-centre position (i.e. shell fragment 14
Elastic force is still applied with micro thrust away from operating mechanism B direction to push rod 8 close to zero, now shell fragment 14), push away in Fig. 1
The right-hand member of bar 8 promotes 18 actions of lock and unlocks operating mechanism B, and moving contact 1 is made under the pulling force effect of extension spring 22 in FIG
Counter-clockwise swing and depart from static contact 1, realize open circuit.Do so can significantly lower first or eliminate which to be applied under alternating current
The jitter phenomenon for being improves its stability, and secondly its elastic force will be reduced rapidly (connecing by the elastic force of shell fragment once being overcome triggering
It is bordering on zero), this characteristic will improve triggering rear push-rod 8 and promote lock 18 to force the reliability of operating mechanism B actions.Because from bullet
Spring design is changed to the scheme of shell fragment design and is changed into switching value to control by original working value control mode, when electric current increases
Elastic force will be weakened lifting indirectly bat and the power of iron core by rapid to structure during design load.Therefore, the structure is in failure electricity
The more original structure of process when stream meets operation condition or protective current value after its triggering increased the effect of boosting push rod, so as to
Further increase the speed and reliability of product overcurrent protection action.
In this example, the shell fragment 9 and shrouding 14 are fixed in the yoke 10 by bolt 13, such as Fig. 2.When
So, we can also adopt following this connected mode：The yoke 10 is stamping parts, and the yoke 10 right-hand member position in FIG
Put and form connection feeler, the connection through hole on shell fragment 9 and shrouding 14 is enclosed within the connection feeler during assembling, after the completion of pass through
The connection feeler of yoke is carried out riveted to complete the fixation between shell fragment 9, shrouding 14 and yoke 10.
With reference to shown in Fig. 1 and Fig. 3, in this example, the shell fragment 9 is ellipsoidal structure, and the middle part of shell fragment 9 is formed with slip
The pilot hole 9a being set on the push rod 8, is fixedly installed on the push rod 8 positioned at the shell fragment 9 away from the operation machine
The push rod flange 8a of that side of structure B and positioned at the shell fragment 9 near that side of operating mechanism B solid boss 12.It is real
When border is applied, when electric current is broken down and make push rod 8 move right in FIG, push rod 8 is by the push rod flange for arranging thereon
8a promotes shell fragment 9 to move near shrouding 14, and after the solid boss 12 on push rod 8 contradicts 14 left surface of shrouding, push rod 8 stops
It is mobile；When fault current disappears, under the elastic force effect of shell fragment 9, spring 9 promotes push rod 8 to be moved to the left, and makes push rod 8 extensive
Again to the state shown in Fig. 1.
In this example, push rod flange 8a is structure as a whole with push rod 8, and the two is integrally formed.Above-mentioned solid boss 12 with it is described
Push rod 8 is detachably connected, and axial location of the solid boss 12 on push rod 8 is adjustable.
Concrete assembling mode between the shell fragment 9 and yoke 10 is as follows：Such as Fig. 3, the upper and lower ends of 9 long axis direction of shell fragment
A connecting hole 9b is formed respectively with, the bolt 13 passes through connecting hole 9b and screws in the yoke 10, so as to shell fragment 9 is fixed
In the yoke 10.
Several hole 9c (also referred to as material reducing adjustment hole) for differing in size different are formed with the shell fragment 9,
The hole 9c that these are arranged on shell fragment 9 is used to adjusting the elastic force of shell fragment 9, thus its shape, size, be distributed it is specified with product
The overcurrent protection value of electric current or product is relevant, and this patent is to disclose a kind of design to the control of shell fragment elastic force in this
Material reducing adjustment hole is either designed to any shape, size, distribution and is described in this patent conceive by design.
Solid boss 12 is also equipped with the shell fragment 9 and shrouding 14.Solid boss on shell fragment, push rod, shrouding
12 are used to adjusting the minimum force value and travel position of shell fragment in this electromagnetic system, therefore the shape of solid boss 12, size, divide
Cloth, realize that technique specifically can be set according to actual needs.
This patent is the inventional idea described by taking conventional small chopper as an example, but this patent design do not limit be used in it is little
Type chopper.Phase use range may include the miniature circuit breaker with selective protection, breaker of plastic casing, omnipotent breaker etc..
Certainly above-described embodiment technology design only to illustrate the invention and feature, its object is to allow and are familiar with technique
People will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all according to this
Equivalent transformation or modification that the spirit of bright main technical schemes is done, should all be included within the scope of the present invention.
Claims (9)
1. a kind of overcurrent protection of chopper, including the electromagnetic system (A) and operating mechanism (B) that cooperate, described
Electromagnetic system (A) including static contact (2), the end of incoming cables (3) electrically connected with the static contact (2), be serially connected in the end of incoming cables (3) and
Coil (5) between affiliated static contact (2), and static iron core (6) and dynamic iron core (7) with the coil (5) electrical cooperation, it is described
Operating mechanism (B) includes the moving contact (1) being engaged with the static contact (2), and the outlet that electrically connects with the moving contact (1)
End (4),
It is characterized in that：Be fixed with the dynamic iron core (7) can with the dynamic iron core make simultaneously it is close/away from the operating mechanism
(B) push rod (8), and with operating mechanism (B) being linked, is connected with a shell fragment (9) on the push rod (8), and the shell fragment (9)
Two opposite ends are relatively fixed with the static contact (2)；
Also include yoke (10) and the shrouding (14) being fixed in the yoke (10), the static contact (2) is fixed on the envelope
On plate (14), sleeve (11) in the yoke (10), is fixed with, the static iron core (6) is fixed in described sleeve pipe (11), institute
State dynamic iron core (7) to be axially slidably arranged in described sleeve pipe (11), the coil (5) be wrapped in described sleeve pipe (11) outward and
Internal positioned at the yoke (10), also including shrouding (14), the shrouding (14) and the shell fragment (9) are each attached to the yoke
(10) on, and the dynamic iron core (7), static iron core (6), shell fragment (9), shrouding (14) and static contact (2) are along near the operation
The direction of mechanism (B) is sequentially arranged.
2. the overcurrent protection of chopper according to claim 1, it is characterised in that：The static iron core (6), shrouding
(14) coaxially arranged mistake rod aperture and on static contact (2) is provided with, push rod (8) slip is located in these three and crosses in rod aperture.
3. the overcurrent protection of chopper according to claim 1, it is characterised in that：The shell fragment (9) and shrouding
(14) it is to be fixed in the yoke (10) by bolt (13).
4. the overcurrent protection of chopper according to claim 3, it is characterised in that：The shell fragment (9) is ellipse
Shape structure.
5. the overcurrent protection of chopper according to claim 4, it is characterised in that：The middle part of the shell fragment (9)
The pilot hole (9a) being slidably located on the push rod (8) is formed with, is fixedly installed positioned at the shell fragment on the push rod (8)
(9) push rod flange (8a) away from the operating mechanism (B) that side, and the shell fragment (9) is located near the operation machine
The solid boss (12) of structure (B) that side.
6. the overcurrent protection of chopper according to claim 5, it is characterised in that：The push rod flange (8a) with
The push rod (8) is structure as a whole, and the solid boss (12) is detachably connected with the push rod (8), and the solid boss
(12) axial location on push rod (8) is adjustable.
7. the overcurrent protection of chopper according to claim 4, it is characterised in that：Shell fragment (9) the major axis side
To upper and lower ends be formed respectively with a connecting hole (9b), the bolt (13) is through the connecting hole (9b) and screws in the yoke
(10) in, so as to shell fragment (9) is fixed in the yoke (10).
8. the overcurrent protection of chopper according to claim 4, it is characterised in that：It is formed with the shell fragment (9)
For adjusting several holes (9c) of the shell fragment elastic force.
9. the overcurrent protection of chopper according to claim 4, it is characterised in that：The shell fragment (9) and shrouding
(14) solid boss (12) is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018107.3A CN104505316B (en) | 2015-01-14 | 2015-01-14 | The overcurrent protection of chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018107.3A CN104505316B (en) | 2015-01-14 | 2015-01-14 | The overcurrent protection of chopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104505316A CN104505316A (en) | 2015-04-08 |
| CN104505316B true CN104505316B (en) | 2017-04-05 |
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ID=52947055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510018107.3A Active CN104505316B (en) | 2015-01-14 | 2015-01-14 | The overcurrent protection of chopper |
Country Status (1)
| Country | Link |
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| CN (1) | CN104505316B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204407275U (en) * | 2015-01-14 | 2015-06-17 | 法泰电器（江苏）股份有限公司 | The overcurrent protective device of circuit breaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57182025A (en) * | 1981-04-30 | 1982-11-09 | Tezuka Seisakusho:Kk | Leaked gas alarm breaker |
| DE102004056278A1 (en) * | 2004-11-22 | 2006-06-08 | Abb Patent Gmbh | Switching device with a thermal and electromagnetic release |
| CN102436984B (en) * | 2011-12-26 | 2014-01-15 | 法泰电器（江苏）股份有限公司 | Breaker rapid disjunction device |
| CN203377163U (en) * | 2013-05-31 | 2014-01-01 | 常州盛士达传感器有限公司 | High-pressure tube pressure switch |
-
2015
- 2015-01-14 CN CN201510018107.3A patent/CN104505316B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204407275U (en) * | 2015-01-14 | 2015-06-17 | 法泰电器（江苏）股份有限公司 | The overcurrent protective device of circuit breaker |
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| CN104505316A (en) | 2015-04-08 |
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