CN109979786A - A kind of breaker - Google Patents
A kind of breaker Download PDFInfo
- Publication number
- CN109979786A CN109979786A CN201910377135.2A CN201910377135A CN109979786A CN 109979786 A CN109979786 A CN 109979786A CN 201910377135 A CN201910377135 A CN 201910377135A CN 109979786 A CN109979786 A CN 109979786A
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- CN
- China
- Prior art keywords
- moving contact
- contact
- swing rod
- rotating mechanism
- breaker
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of breaker, comprising: shell；Release lever；Contact assembly, including moving contact and static contact, static contact are immobilized in the shell；Rotating mechanism, is rotatably connected at shell, and part moving contact is located in rotating mechanism and is rotatablely connected with moving contact；Stroke amplifying mechanism, it is arranged between moving contact and rotating mechanism, stroke amplifying mechanism is connect with moving contact and rotating mechanism respectively, and stroke amplifying mechanism extends to the direction close to release lever, in the short-circuit state, repulsion between moving contact and static contact rotates moving contact and stroke amplifying mechanism relative rotation mechanism, so that stroke amplifying mechanism pushes release lever rotation.Above-mentioned breaker is equivalent between moving contact and rotating mechanism in the prior art and increases stroke amplifying mechanism; compared with existing electromagnet type back-up protection; the available space in breaker is increased, and then is conducive to the inner body heat dissipation of breaker, extends the service life of breaker.
Description
Technical field
The present invention relates to the technical fields of breaker, and in particular to a kind of breaker.
Background technique
The short-circuit protection of existing electronic breaker relies on electronic component to realize, the response and place due to electronic component
Reason speed is slow, causes the drop-away time of electronic component partially long, in the case where high current short circuit, generally requires and adds back-up protection
Structure to reduce actuation time of the breaker under short circuit current, and then improves the current limiting capacity of breaker.
Currently, the common back-up protection structure of electronic breaker is electromagnet type.For example, Chinese patent literature
CN10177090B discloses a kind of back-up protection tripping device of electronic type molded case circuit breaker, comprising: armature, bracket, magnetic yoke,
Pin shaft and reaction spring etc..
Operating mechanism, moving contact, static contact, rotating mechanism, release lever are generally included inside existing electronic breaker
Equal components, static contact are oppositely arranged with moving contact interval, and moving contact is inserted into rotating mechanism cover, and rotating mechanism and moving contact turn
Dynamic connection, release lever is connect with operating mechanism, and the outside of moving contact and rotational structure is arranged in the back-up protection tripping device,
By the back-up protection releasing structure release lever is rotated, so that the operating mechanism of electronic breaker is threaded off, realizes
The quick disjunction of breaker.Since the outside of moving contact and rotating mechanism is arranged in the back-up protection tripping device, so that electronics
The internal structure of formula breaker is quite full.Moreover, with the electronic breaker with residual current protecting function demand by
Step increases, this requires increasing the bending of electric leakage module and conductor in the inner space of existing electronic type molded material shell, in this way
Further make the inner space of electronic breaker crowded, is unfavorable for the heat dissipation of electronic breaker inner body, makes inner body
It is more easy to damage, reduce the service life of breaker.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming the inner space of electronic breaker in the prior art
Crowded defect, to provide a kind of breaker.
In order to solve the above technical problem, the present invention provides a kind of breakers, comprising:
Shell；
Release lever；
Contact assembly, including moving contact and static contact, the static contact are fixed in the shell, the moving contact and institute
It states static contact interval to be oppositely arranged, and the closing position that there is the moving contact to contact with the static contact and the dynamic touching
The open position that head is separated with the static contact；
Rotating mechanism, is rotatably connected at the shell, the part moving contact be located in the rotating mechanism and with
The moving contact rotation connection；
Stroke amplifying mechanism is arranged between the moving contact and the rotating mechanism, the stroke amplifying mechanism difference
It is connect with the moving contact and rotating mechanism, and the stroke amplifying mechanism extends to the direction close to the release lever, just
Under normal sub-gate and closing state, external force makes the rotating mechanism, moving contact and stroke amplifying mechanism synchronous rotary, so that the row
Journey enlarger is not contacted with the release lever；
In the short-circuit state, the repulsion between the moving contact and the static contact makes the moving contact and stroke enlarger
Structure is rotated relative to the rotating mechanism, so that the stroke amplifying mechanism pushes the release lever rotation.
Optionally, the stroke amplifying mechanism includes the first swing rod and the second swing rod for connecting with first swing rod, institute
It states the first swing rod to connect with the moving contact, one end of second swing rod is connect with the rotating mechanism, and the other end is to close
The direction of the release lever extends, and in the short-circuit state, the stroke amplifying mechanism is with the company of first swing rod and moving contact
Contact is that the tie point of the first fulcrum, the second swing rod and rotating mechanism is the rotation of the second fulcrum, and second swing rod is made to push institute
State release lever rotation.
Optionally, connection of the tie point of first swing rod and the second swing rod close to second swing rod and rotating mechanism
Point.
Optionally, second swing rod is bent stick, and the direction of opening towards first swing rod of the bent stick is set
It sets.
Optionally, the bent stick is curved rod.
Optionally, first swing rod and the second swing rod are fixedly connected, first swing rod and the fixed company of the moving contact
It connects, one end of second swing rod is fixedly connected with the rotating mechanism.
Optionally, the moving contact is provided with shaft close to one end of the stroke amplifying mechanism, and the moving contact passes through
The shaft and the rotating mechanism are rotatablely connected.
Optionally, the moving contact is provided with fixing axle close to one end of the stroke amplifying mechanism, sets in the shaft
It is equipped with elastic component, one end of the elastic component is abutted with the rotating mechanism, and the other end is abutted with the fixing axle, in short-circuit shape
Under state, the elastic component is for driving the moving contact and stroke amplifying mechanism to reset.
Optionally, the moving contact and rotating mechanism are vacantly arranged above the bottom plate of the shell.
It optionally, further include the operating mechanism on the shell, the operating mechanism is connect with the release lever, and
The operating mechanism is located at the top of the rotating mechanism.
It optionally, further include arc-extinguish chamber, the contact point of the static contact and the moving contact is located in the arc-extinguish chamber, institute
Arc-extinguish chamber is stated for extinguishing the electric arc between the moving contact and static contact.
Technical solution of the present invention has the advantages that
1. breaker provided by the invention, including shell, release lever, contact assembly, rotating mechanism and stroke amplifying mechanism,
Contact is immobilized in the shell, and moving contact is oppositely arranged with static contact interval, during breaker open operation and combined floodgate, static contact
Normally it can separate and contact with moving contact.Rotating mechanism is rotatably connected at shell, and rotating mechanism is located on moving contact
And be rotatablely connected with moving contact, that is, moving contact can the rotation of relative rotation mechanism, moving contact and rotating mechanism can opposite shell it is synchronous
Rotation.Stroke amplifying mechanism be arranged between moving contact and rotating mechanism, stroke amplifying mechanism respectively with moving contact and whirler
Structure connection, meanwhile, stroke amplifying mechanism extends to the direction close to release lever；Breaker when carrying out normal separating brake and closing a floodgate,
Stroke amplifying mechanism moving contact and rotating mechanism rotate synchronously, and stroke amplifying mechanism does not connect during rotation with release lever
Touching, in this way in the normal separating brake of breaker and combined floodgate, stroke amplifying mechanism will not be contacted with the other parts in breaker, in turn
It will not influence the normal separating brake and combined floodgate of breaker.In the case where high current short circuit, the repulsion between static contact and moving contact
Drive moving contact and stroke amplifying mechanism relative rotation mechanism rotation, due to moving contact can relative rotation mechanism rotate certain angle
Degree, the angle enlargement that can be turned by stroke amplifying mechanism, so that stroke amplifying mechanism can during rotation
To push release lever to rotate, operating mechanism can be driven to make breaker disjunction after release lever rotation.
It is equivalent between moving contact and rotating mechanism in the prior art in this way and increases stroke amplifying mechanism, that is, benefit
Breaker is increased compared with existing electromagnet type back-up protection with original space between moving contact and rotating mechanism
Interior available space, and then be conducive to the inner body heat dissipation of breaker, extend the service life of breaker.
2. breaker provided by the invention, stroke amplifying mechanism includes the first swing rod and the second pendulum connecting with the first swing rod
Bar, the first swing rod are connect with moving contact, and one end of the second swing rod is connect with rotating mechanism, and the other end of the second swing rod is in short-circuit shape
It with the tie point that the tie point of the first swing rod and moving contact is the first fulcrum, the second swing rod and rotating mechanism is the second fulcrum under state
It rotates, the second swing rod can push release lever to rotate in rotary course.It follows that the back-up protection of the breaker is the first swing rod
With the second swing rod, firstly, the volume of the first swing rod and the second swing rod be less than electromagnet type back-up protection in the prior art body
Product, reduces back-up protection and occupies space in breaker；Secondly, existing rotation is utilized in the first swing rod and the second swing rod
Space between mechanism and moving contact, in the case where the total volume of guarantee rotating mechanism and moving contact is constant, by the first swing rod
And second the part body of swing rod be placed between rotating mechanism and moving contact, further increase the more than needed of circuit breaker internal in this way
Space increases other function module in circuit breaker internal convenient for subsequent.
Again, since electromagnet type back-up protection structure in the prior art is supported by the suction of yoke magnetization generation
Disappear the elastic force of reaction spring, eventually forms an impact force and removes impact release lever, rotates release lever.But yoke magnetization produces
The elastic force of raw suction and spring is unstable, in order to ensure electromagnet type back-up protection all has effect under various electric currents,
It just needs the position to spring, angle etc. repeatedly to be verified, needs rated current amplifying more than ten times or more in checking procedure,
And serious electrical wear is easily brought in the case where the high current disjunction of moving contact and static contact under instantaneous multiple, and then reduce disconnected
The service life of road device.And stroke amplifying mechanism is not needed using spring, what the rotation of the first swing rod and the second swing rod relied on is
Repulsion between static contact and moving contact, and the repulsion before static contact and moving contact can be by between moving contact and static contact
Contact pressure is controlled, and contact pressure is that existing each breaker is required to be tested and be checked and approved, and, contact pressure
Test and approval be mechanically to open moving contact and static contact, electric mill will not be caused to moving contact and static contact
Damage；That is, the breaker with electromagnet type back-up protection needs to carry out contact pressure test and approval and high current verification, and
The breaker of the application only needs to carry out contact pressure test and approval, therefore, the breaker of the application will not to moving contact and
Static contact causes electrical wear, can extend the service life of breaker.
Finally, electromagnet type back-up protection structure in the prior art needs release lever rotation using reaction spring, by
It is low in the elastic force precision of reaction spring, so that electromagnet type back-up protection structure starts movement to the time of driving release lever rotation
It is spaced inconsistent, causes each drop-away time of operating mechanism different；In order to ensure back-up protection structure is in definite time protection area
Between and in short-term resistance test when be failure to actuate, static contact and moving contact reprimand open after with back-up protection structure start movement before it is necessary
Reserved fault-tolerant section of the time interval as various cumulative errors, moreover, back-up protection structure, which starts movement, to be lagged behind
Moving contact is opened with static contact reprimand, is extended drop-away time in this way, is made breaker can not quick flow-breaking.And the stroke amplification of the application
Mechanism is connected on moving contact, and when moving contact starts turning, stroke amplifying mechanism is also started turning, between the two without the time
Difference, shortens moving contact and static contact denounces the time opened between release lever rotation, and then reduces drop-away time, can make breaker
Quick flow-breaking；Meanwhile the angle of moving contact relative rotation mechanism rotation is determined by the repulsion between moving contact and static contact, and move
Repulsion between contact and static contact by peak value of short between the two by being determined, in the timing of peak value of short one,
Stroke amplifying mechanism starts movement and is higher than electromagnet type in the prior art to the time interval consistency of driving release lever rotation
Back-up protection structure.
3. the tie point of breaker provided by the invention, the first swing rod and the second swing rod is close to the second swing rod and rotating mechanism
Tie point, the bigger multiple of rotation angle enlargement between moving contact and rotating mechanism can be made in this way, with ensure moving contact with
The second swing rod can push release lever to rotate during static contact reprimand is opened.
4. breaker provided by the invention, the second swing rod is bent stick, the direction of opening the first swing rod of direction of bent stick
Setting, on the one hand, in normal separating brake and combined floodgate, bent stick can ensure that the second swing rod will not touch release lever；On the other hand, exist
When short-circuit condition, bent stick can increase the contact area of the second swing rod and release lever, further ensure that moving contact and static contact are denounceed
The second swing rod can push release lever to rotate during opening.
5. breaker provided by the invention, moving contact is provided with shaft close to one end of stroke amplifying mechanism, and moving contact is logical
It crosses shaft and rotating mechanism is rotatablely connected, when power is applied on rotating mechanism, moving contact and rotating mechanism can be moved synchronously,
When power is applied on moving contact, moving contact by shaft can relative rotation mechanism rotation, can ensure that breaker normal in this way
During opening a sluice gate and closing a floodgate, stroke amplifying mechanism, which does not influence it, normally opens a sluice gate and closes a floodgate, and in circuit breaker internal short circuit,
Stroke amplifying mechanism can drive release lever to rotate, and operating mechanism is made to thread off.
6. breaker provided by the invention, moving contact is provided with fixing axle close to one end of stroke amplifying mechanism, in shaft
It is provided with elastic component, one end of elastic component is abutted with rotating mechanism, and the other end of elastic component is abutted with fixing axle, in short-circuit condition
Under, elastic component is for driving moving contact and stroke amplifying mechanism to reset, that is, when moving contact and stroke amplifying mechanism relative rotation machine
When structure rotates, elastic component can occur elastic deformation and generate elastic force, when stroke amplifying mechanism promotion release lever rotation, so that
After operating mechanism tripping, moving contact and stroke amplifying mechanism can be restored to original position under the elastic power drive of elastic component,
It is normally opened a sluice gate and is closed a floodgate convenient for subsequent.
7. breaker provided by the invention, moving contact and rotating mechanism are vacantly arranged above the bottom plate of shell, on the one hand,
It can ensure that moving contact and rotating mechanism can normally rotate；On the other hand, the revolution space that moving contact and rotating mechanism can be increased, into
And when moving contact and stroke amplifying mechanism relative rotation mechanism are rotated, increase the revolution space of stroke amplifying mechanism,
Ensure that stroke amplifying mechanism can abut with release lever and release lever is pushed to rotate.
8. breaker provided by the invention, operating mechanism is arranged on shell, and operating mechanism is connect with release lever, and operates
Mechanism is located at the top of rotating mechanism, so that operating mechanism can normally thread off when release lever rotates, meanwhile, breaker is just normally opened
Under lock and "on" position, the pressure of operating mechanism can be directly applied on rotating mechanism, so that rotating mechanism, moving contact and stroke
Enlarger can synchronous rotary.
9. the contact point of breaker provided by the invention, static contact and moving contact is located in arc-extinguish chamber, arc-extinguish chamber is for putting out
The electric arc to go out between moving contact and static contact avoids electric arc damage moving contact and static contact.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the top view of the breaker closing state provided in a specific embodiment of the invention；
Fig. 2 is the cross-sectional view in Fig. 1 at A-A；
Fig. 3 is the partial schematic diagram of the breaker closing state provided in a specific embodiment of the invention；
Moving contact and static contact denounce open state when Fig. 4 is the circuit breaker short circuit provided in a specific embodiment of the invention
Top view；
Fig. 5 is the cross-sectional view in Fig. 4 at B-B.
Description of symbols:
1, shell；2, release lever；3, static contact；4, moving contact；5, rotating mechanism；6, stroke amplifying mechanism；61, the first pendulum
Bar；62, the second swing rod；7, fixing axle；8, shaft；9, elastic component；10, conducting wire；11, arc-extinguish chamber；12, operating mechanism.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
A kind of specific embodiment of breaker as shown in Figures 1 to 5, comprising:
Shell 1.
Release lever 2.
Contact assembly, including moving contact 4 and static contact 3, the static contact 3 are fixed in the shell 1, the moving contact
4 are oppositely arranged with the static contact 3 interval, and the closing position that is contacted with the static contact 3 with the moving contact 4 and
The moving contact 4 open position isolated with the static contact 3.That is, when breaker is in closing position, moving contact 4 with it is quiet
Contact 3 contacts so as to be powered between moving contact 4 and static contact 5, when breaker be in open position, moving contact 4 and static contact 5
Separation between moving contact 4 and static contact 5 so as to power off.
Rotating mechanism 5, is rotatably connected at the shell 1, and the part moving contact 4 is located in the rotating mechanism 5
And it is rotatablely connected with the moving contact 4；
Stroke amplifying mechanism 6 is arranged between the moving contact 4 and the rotating mechanism 5, the stroke amplifying mechanism 6
It is connect respectively with the moving contact 4 and rotating mechanism 5, and the stroke amplifying mechanism 6 prolongs to the direction close to the release lever 2
It stretches, under normal sub-gate and closing state, external force makes 6 synchronous rotary of the rotating mechanism 5, moving contact 4 and stroke amplifying mechanism,
So that the stroke amplifying mechanism 6 is not contacted with the release lever 2.
In the short-circuit state, the repulsion between the moving contact 4 and the static contact 3 puts the moving contact 4 and stroke
Great institutions 6 are rotated relative to the rotating mechanism 5, so that the stroke amplifying mechanism 6 pushes the release lever 2 to rotate.
Above-mentioned breaker includes shell 1, release lever 2, contact assembly, rotating mechanism 5 and stroke amplifying mechanism 6, and contact is solid
It being scheduled in shell 1, moving contact 4 is oppositely arranged with the interval of static contact 3, during breaker open operation and combined floodgate, 3 He of static contact
Moving contact 4 normally can be separated and be contacted.Rotating mechanism 5 is rotatably connected at shell 1, and rotating mechanism 5 is located at moving contact 4
It is upper and be rotatablely connected with moving contact 4, that is, moving contact 4 can relative rotation mechanism 5 rotate, moving contact 4 and rotating mechanism 5 can be opposite
1 synchronous rotary of shell.Stroke amplifying mechanism 6 is arranged between moving contact 4 and rotating mechanism 5, stroke amplifying mechanism 6 respectively with it is dynamic
Contact 4 and rotating mechanism 5 connect, meanwhile, stroke amplifying mechanism 6 extends to the direction close to release lever 2；Breaker is carrying out just
When normal separating brake and combined floodgate, 6 moving contact 4 of stroke amplifying mechanism and rotating mechanism 5 are rotated synchronously, and stroke amplifying mechanism 6 is in rotation
It is not contacted in the process with release lever 2, in this way in the normal separating brake of breaker and combined floodgate, stroke amplifying mechanism 6 will not be with breaker
Interior other parts contact, and then will not influence the normal separating brake and combined floodgate of breaker.In the case where high current short circuit, stationary contact
Repulsion driving moving contact 4 and the rotation of 6 relative rotation mechanism 5 of stroke amplifying mechanism between first 3 and moving contact 4, due to moving contact 4
Can relative rotation mechanism 5 rotate certain angle, the angle enlargement that can be turned by stroke amplifying mechanism 6 so that
Stroke amplifying mechanism 6 can push release lever 2 to rotate during rotation, and release lever 2 can drive operating mechanism 12 after rotating
Make breaker disjunction.
It is equivalent between moving contact 4 and rotating mechanism 5 in the prior art in this way and increases stroke amplifying mechanism 6, that is,
Original space between moving contact 4 and rotating mechanism 5 is utilized, compared with existing electromagnet type back-up protection, increase is resolved
Available space in the device of road, and then be conducive to the inner body heat dissipation of breaker, extend the service life of breaker.
It is understood that part moving contact 4 is located at the part-structure for meaning that a moving contact 4 in rotating mechanism 5
In a rotating mechanism 5.When in breaker have multiple moving contacts 4 when, rotating mechanism 5 also have it is multiple, moving contact 4 with
Rotating mechanism 5 is arranged correspondingly.
As shown in Fig. 2, Fig. 3 and Fig. 5, the stroke amplifying mechanism 6 include the first swing rod 61 and with first swing rod 61
Second swing rod 62 of connection, first swing rod 61 are connect with the moving contact 4, one end of second swing rod 62 and the rotation
Rotation mechanism 5 connects, and the other end extends to the direction close to the release lever 2, in the short-circuit state, the stroke amplifying mechanism 6
Tie point with first swing rod 61 and moving contact 4 is that the tie point of the first fulcrum, the second swing rod 62 and rotating mechanism 5 is the
The rotation of two fulcrums, makes second swing rod 62 that the release lever 2 be pushed to rotate.
It follows that the back-up protection of the breaker is the first swing rod 61 and the second swing rod 62.Firstly, 61 He of the first swing rod
The volume of second swing rod 62 is less than the volume of electromagnet type back-up protection in the prior art, reduces back-up protection in breaker
Interior occupies space；Secondly, the first swing rod 61 and the second swing rod 62 are utilized between existing rotating mechanism 5 and moving contact 4
Space, guarantee rotating mechanism 5 and moving contact 4 total volume it is constant in the case where, by the first swing rod 61 and the second swing rod 62
Part body is placed between rotating mechanism 5 and moving contact 4, is further increased the excess room of circuit breaker internal in this way, is convenient for
It is subsequent to increase other function module in circuit breaker internal.
Again, since electromagnet type back-up protection structure in the prior art is supported by the suction of yoke magnetization generation
Disappear the elastic force of reaction spring, eventually forms an impact force and removes impact release lever, rotates release lever.But yoke magnetization produces
The elastic force of raw suction and spring is unstable, in order to ensure electromagnet type back-up protection all has effect under various electric currents,
It just needs the position to spring, angle etc. repeatedly to be verified, needs rated current amplifying more than ten times or more in checking procedure,
And serious electrical wear is easily brought in the case where the high current disjunction of moving contact and static contact under instantaneous multiple, and then reduce disconnected
The service life of road device.And stroke amplifying mechanism 6 is not needed using spring, the rotation of the first swing rod 61 and the second swing rod 62 relies on
Be repulsion (power generated under short-circuit conditions) between static contact 3 and moving contact 4, and the reprimand before static contact 3 and moving contact 4
Power can be controlled by the contact pressure between moving contact 4 and static contact 3, and contact pressure is that existing each breaker needs
It is tested and is checked and approved, and, the test and approval of contact pressure are mechanically to open moving contact 4 and static contact
3, electrical wear will not be caused to moving contact 4 and static contact 3；That is, the breaker with electromagnet type back-up protection is touched
Head pressure test and approval and high current verification, and the breaker of the application only needs to carry out contact pressure test and approval,
Therefore, the breaker of the application will not cause electrical wear to moving contact 4 and static contact 3, can extend the service life of breaker.
Finally, electromagnet type back-up protection structure in the prior art needs release lever rotation using reaction spring, by
It is low in the elastic force precision of reaction spring, so that electromagnet type back-up protection structure starts movement to the time of driving release lever rotation
It is spaced inconsistent, causes each drop-away time of operating mechanism different；In order to ensure back-up protection structure is in definite time protection area
Between and in short-term resistance test when be failure to actuate, static contact and moving contact reprimand open after with back-up protection structure start movement before it is necessary
Reserved fault-tolerant section of the time interval as various cumulative errors, moreover, back-up protection structure, which starts movement, to be lagged behind
Moving contact is opened with static contact reprimand, is extended drop-away time in this way, is made breaker can not quick flow-breaking.And the stroke amplification of the application
Mechanism 6 is connected on moving contact 4, and when moving contact 4 starts turning, stroke amplifying mechanism 6 is also started turning, between the two without when
Between it is poor, shorten moving contact 4 and static contact 3 and denounce the time opened between the rotation of release lever 2, and then reduce drop-away time, can make
Breaker quick flow-breaking；Meanwhile the angle of 4 relative rotation mechanism 5 of moving contact rotation is by the reprimand between moving contact 4 and static contact 3
Power determines, and the repulsion between moving contact 4 and static contact 3 by peak value of short between the two by being determined, electric in short circuit
One timing of stream peak value, stroke amplifying mechanism 6 start movement and are higher than existing skill to the time interval consistency that driving release lever 2 rotates
Electromagnet type back-up protection structure in art.
As shown in Fig. 2, Fig. 3 and Fig. 5, first swing rod 61 is fixedly connected with the second swing rod 62, first swing rod 61
It is fixedly connected with the moving contact 4, one end of second swing rod 62 is fixedly connected with the rotating mechanism 5, can make in this way
Position between one swing rod 61, the second swing rod 62, moving contact 4 and rotating mechanism 5 is stronger, so that stroke amplifying mechanism 6
Stroke amplification it is more acurrate.
As shown in figure 3, the tie point of first swing rod 61 and the second swing rod 62 is close to second swing rod 62 and rotation
The tie point of mechanism 5, the multiple that can make the rotation angle enlargement between moving contact 4 and rotating mechanism 5 bigger in this way, to ensure to move
The second swing rod 62 can push release lever 2 to rotate during contact 4 and the reprimand of static contact 3 are opened.
As shown in Fig. 2, Fig. 3 and Fig. 5, second swing rod 62 is bent stick, and the opening of the bent stick is towards described the
The direction of one swing rod 61 is arranged.On the one hand, in normal separating brake and combined floodgate, it is de- that bent stick can ensure that the second swing rod 62 will not be touched
Button bar 2；On the other hand, in short-circuit condition, bent stick can increase the contact area of the second swing rod 62 and release lever 2, further
Ensure moving contact 4 and static contact 3 reprimand open during the second swing rod 62 can push release lever 2 rotate.
For bent stick shape with no restriction, bent stick normally opens a sluice gate that release lever will not be touched under "on" position
2, in the short-circuit state, bent stick can touch release lever 2 and release lever 2 is pushed to rotate.For example, in order to guarantee bent stick energy
Promotion release lever 2 rotates, and makes release lever 2 that operating mechanism 12 be driven reliably to thread off, and bent stick can be curved rod, by multistage broken line
Bar is spliced or is spliced by multistage broken line and multistage camber line.In order to further ensure that bent stick normally open a sluice gate and
Under "on" position, release lever 2 will not be touched, in the short-circuit state, bent stick can touch release lever 2 and release lever 2 is pushed to rotate
Bent stick is curved rod, and curved rod can be the curved rod that multistage arc is spliced into, the radius of every section of arc can it is equal can also
With unequal,
As shown in Fig. 2, Fig. 3 and Fig. 5, the moving contact 4 is provided with shaft 8 close to one end of the stroke amplifying mechanism 6,
The moving contact 4 is rotatablely connected by the shaft 8 with the rotating mechanism 5.When power is applied on rotating mechanism 5, touching is moved
First 4 and rotating mechanism 5 can move synchronously, when power is applied on moving contact 4, moving contact 4 by shaft 8 can relative rotation machine
Structure 5 rotates, and can ensure that breaker in this way during normally opening a sluice gate and closing a floodgate, it is normal that stroke amplifying mechanism 6 does not influence it
It opens a sluice gate and closes a floodgate, and in circuit breaker internal short circuit, stroke amplifying mechanism 6 can drive release lever 2 to rotate, and make operating mechanism 12
Tripping.
As shown in Fig. 2, Fig. 3 and Fig. 5, the moving contact 4 is provided with fixing axle close to one end of the stroke amplifying mechanism 6
7, be provided with elastic component 9 in the shaft 8, one end of the elastic component 9 is abutted with the rotating mechanism 5, the other end with it is described
Fixing axle 7 abuts, and in the short-circuit state, the elastic component 9 is for driving the moving contact 4 and stroke amplifying mechanism 6 to reset.
That is, elastic deformation generation can occur for elastic component 9 when moving contact 4 and 6 relative rotation mechanism 5 of stroke amplifying mechanism rotate
Elastic force, when stroke amplifying mechanism 6 pushes release lever 2 to rotate, so that moving contact 4 and stroke amplify after operating mechanism 12 is threaded off
Mechanism 6 can be restored to original position under the elastic power drive of elastic component 9, normally opened a sluice gate and closed a floodgate convenient for subsequent.
Elastic component 9 can be torsional spring or other elastic constructions with the above function.
As shown in figures 2 and 5, the moving contact 4 and rotating mechanism 5 are vacantly arranged above the bottom plate of the shell 1.One
Aspect, it can be ensured that moving contact 4 and rotating mechanism 5 can normally rotate；On the other hand, the rotation of moving contact 4 and rotating mechanism 5 can be increased
Turn space, so that increasing stroke amplifying mechanism when moving contact 4 and 6 relative rotation mechanism 5 of stroke amplifying mechanism rotate
6 revolution space, it is ensured that stroke amplifying mechanism 6 can abut with release lever 2 and release lever 2 is pushed to rotate.
As shown in Fig. 2, Fig. 3 and Fig. 5, breaker further includes the operating mechanism 12 on the shell 1, the operation machine
Structure 12 is connect with the release lever 2, and the operating mechanism 12 is located at the top of the rotating mechanism 5, so that release lever 2 rotates
When operating mechanism 12 can normally thread off, meanwhile, breaker is opened a sluice gate normally under "on" position, and the pressure of operating mechanism 12 can be straight
It connects and is applied on rotating mechanism 5, so that rotating mechanism 5, moving contact 4 and stroke amplifying mechanism 6 can synchronous rotaries.
As shown in Fig. 2, Fig. 3 and Fig. 5, breaker further includes arc-extinguish chamber 11, and the static contact 3 connects with the moving contact 4
Contact is located in the arc-extinguish chamber 11, and the arc-extinguish chamber 11 is used to extinguish the electric arc between the moving contact 4 and static contact 3, keeps away
Exempt from electric arc damage moving contact 4 and static contact 3.
As shown in Fig. 2, Fig. 3 and Fig. 5, breaker further includes conducting wire 10 and terminal plate, conducting wire 10 respectively with the moving contact 4
It is connected with terminal plate, the terminal plate is connected on the bottom plate of the shell 1.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of breaker characterized by comprising
Shell (1)；
Release lever (2)；
Contact assembly, including moving contact (4) and static contact (3), the static contact (3) are fixed in the shell (1), described dynamic
Contact (4) is oppositely arranged with the static contact (3) interval, and the conjunction contacted with the moving contact (4) with the static contact (3)
The open position that gate position and the moving contact (4) are separated with the static contact (3)；
Rotating mechanism (5) is rotatably connected at the shell (1), and the part moving contact (4) is located at the rotating mechanism
(5) it is rotatablely connected in and with the moving contact (4)；
Stroke amplifying mechanism (6) is arranged between the moving contact (4) and the rotating mechanism (5), the stroke amplifying mechanism
(6) it is connect respectively with the moving contact (4) and rotating mechanism (5), and the stroke amplifying mechanism (6) stretches out the rotating mechanism
(5) and to the direction close to the release lever (2) extend, under normal sub-gate and closing state, external force makes the rotating mechanism
(5), moving contact (4) and stroke amplifying mechanism (6) synchronous rotary so that the stroke amplifying mechanism (6) not with the release lever
(2) it contacts；
In the short-circuit state, the repulsion between the moving contact (4) and the static contact (3) makes the moving contact (4) and stroke
Enlarger (6) is rotated relative to the rotating mechanism (5), so that the stroke amplifying mechanism (6) pushes the release lever (2) to turn
It is dynamic.
2. breaker according to claim 1, which is characterized in that the stroke amplifying mechanism (6) includes the first swing rod
(61) and with first swing rod (61) the second swing rod (62) connecting, first swing rod (61) and the moving contact (4) are even
It connects, one end of second swing rod (62) is connect with the rotating mechanism (5), side of the other end to close the release lever (2)
To extension, in the short-circuit state, the stroke amplifying mechanism (6) is with the tie point of first swing rod (61) and moving contact (4)
Tie point for the first fulcrum, the second swing rod (62) and rotating mechanism (5) is the rotation of the second fulcrum, makes second swing rod (62)
The release lever (2) are pushed to rotate.
3. breaker according to claim 2, which is characterized in that the company of first swing rod (61) and the second swing rod (62)
Tie point of the contact close to second swing rod (62) and rotating mechanism (5).
4. breaker according to claim 3, which is characterized in that second swing rod (62) is bent stick, the bending
The opening of bar is arranged towards the direction of first swing rod (61).
5. breaker according to claim 4, which is characterized in that the bent stick is curved rod.
6. breaker according to claim 2, which is characterized in that first swing rod (61) and the second swing rod (62) are fixed
Connection, first swing rod (61) are fixedly connected with the moving contact (4), one end of second swing rod (62) and the rotation
Mechanism (5) is fixedly connected.
7. breaker according to claim 1-6, which is characterized in that the moving contact (4) is close to the stroke
One end of enlarger (6) is provided with shaft (8), and the moving contact (4) passes through the shaft (8) and the rotating mechanism (5)
Rotation connection.
8. breaker according to claim 7, which is characterized in that the moving contact (4) is close to the stroke amplifying mechanism
(6) one end is provided with fixing axle (7), is provided with elastic component (9) on the shaft (8), one end of the elastic component (9) and institute
Rotating mechanism (5) abutting is stated, the other end is abutted with the fixing axle (7), and in the short-circuit state, the elastic component (9) is for driving
It moves the moving contact (4) and stroke amplifying mechanism (6) resets.
9. breaker according to claim 7, which is characterized in that the moving contact (4) and rotating mechanism (5) are in the shell
Hanging setting above the bottom plate of body (1).
10. breaker according to claim 7, which is characterized in that further include arc-extinguish chamber (11), the static contact (3) with
The contact point of the moving contact (4) is located in the arc-extinguish chamber (11), and the arc-extinguish chamber (11) is for extinguishing the moving contact (4)
With the electric arc between static contact (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377135.2A CN109979786A (en) | 2019-05-07 | 2019-05-07 | A kind of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377135.2A CN109979786A (en) | 2019-05-07 | 2019-05-07 | A kind of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109979786A true CN109979786A (en) | 2019-07-05 |
Family
ID=67073071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910377135.2A Pending CN109979786A (en) | 2019-05-07 | 2019-05-07 | A kind of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109979786A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078983A (en) * | 2022-06-17 | 2022-09-20 | 国网河南省电力公司电力科学研究院 | Circuit breaker stroke curve measuring method and device |
-
2019
- 2019-05-07 CN CN201910377135.2A patent/CN109979786A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078983A (en) * | 2022-06-17 | 2022-09-20 | 国网河南省电力公司电力科学研究院 | Circuit breaker stroke curve measuring method and device |
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