CN202423166U - Asymmetric double-contact circuit breaker - Google Patents
Asymmetric double-contact circuit breaker Download PDFInfo
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- CN202423166U CN202423166U CN2011204115985U CN201120411598U CN202423166U CN 202423166 U CN202423166 U CN 202423166U CN 2011204115985 U CN2011204115985 U CN 2011204115985U CN 201120411598 U CN201120411598 U CN 201120411598U CN 202423166 U CN202423166 U CN 202423166U
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Abstract
The utility model discloses an asymmetric double-contact circuit breaker. The asymmetric double-contact circuit breaker comprising a first moving contact, a static contact, a contact spring, a moving contact support, an upper connecting rod, a lower connecting rod, a tripper, a lock catch and a mechanism support. Two ends of the first moving contact are respectively provided with a first contact and a second contact, and the first moving contact is elastically connected to the moving contact support through the contact spring. The moving contact support and the first moving contact possess a common pivot. The static contact is fixedly connected to the double-contact circuit breaker and is provided with a static contact point. One end of the upper connecting rod is pivotally connected to the tripper, the other end of the upper connecting rod is pivotally connected to one end of the lower connecting rod, and the other end of the lower connecting rod is pivotally connected to the moving contact support. The tripper and the lock catch can be pivotally arranged on the mechanism support. The double-contact circuit breaker also comprises a second moving contact and a cut-off driving rod.
Description
Technical field
The utility model relates to a kind of circuit breaker.More particularly, the utility model relates to a kind of asymmetric double-contact circuit breaker.
Background technology
Existing circuit breaker belongs to a kind of can closing and closes, carries and cut-off the electric current under the normal loop condition, and can close the switching device that closes, in official hour, carries and cut-off the electric current under the unusual loop condition (comprising short circuit condition).Usually, the parts of existing circuit breaker comprise tripping, snap close, go up connecting rod, lower link, moving contact rack, moving contact and two fixed contacts, and wherein, moving contact comprises two moving contact contacts, and each fixed contact all is provided with a fixed contact contact.The contact system of circuit breaker adopts a kind of symmetrical structure, and moving contact contact and fixed contact contact all are of similar shape, size and material.
But, when employing has the existing circuit breaker of said structure, during folding under normal load operation and the situation that all can occur losing efficacy under the short-circuit conditions.Failure phenomenon all shows as a side moving contact contact and burns under normal load and short-circuit conditions.
Failure cause under normal load is following.Above-mentioned this symmetrical structure helps balancedly distributing the energy of electric arc on moving contact contact and fixed contact contact when cut-offfing, and makes it receive equal consumption.Yet, because under the actual conditions, desirable symmetry can't realize.On existing circuit breaker, common situation is that one of them moving contact contact separates prior to another moving contact contact, causes the consumption of the moving contact contact that separates earlier to be much higher than design load and to burn inefficacy prematurely.
Failure reasons under short-circuit conditions is following.Undesirable running takes place because of the instability of arc quenching system in electric arc, thereby arc voltage is reduced, and causes the quenching time lengthening.And cause consuming excessively of contact with this.
Therefore, thus need improve existing circuit breaker and overcome the problems referred to above that exist in the existing circuit breaker.
The utility model content
The technical problem that the utility model solves is that losing efficacy appears under the situation of cut-offfing operation and closed procedure in the contact contact that prevents circuit breaker.
According to an aspect of the utility model, a kind of asymmetric double-contact circuit breaker is provided.Said double-contact circuit breaker comprises first moving contact, fixed contact, touch spring, moving contact rack, goes up connecting rod, lower link, tripping, snap close and mechanism rack.The two ends of said first moving contact are provided with first contact and second contact respectively, and said first moving contact flexibly is connected to said moving contact rack through said touch spring.Said moving contact rack has and the shared pivot of said first moving contact.Said fixed contact is mounted to said double-contact circuit breaker regularly, and said fixed contact is provided with the fixed contact contact.A said end of going up connecting rod is connected in said tripping pivotly, and the said other end of going up connecting rod is connected in an end of said lower link pivotly, and the other end of said lower link is connected in said moving contact rack pivotly.Said tripping and said snap close are mounted to said mechanism rack pivotly.Said double-contact circuit breaker also comprises second moving contact and cut-offs drive rod; Said second moving contact is arranged in the said double-contact circuit breaker pivotly; One end of said second moving contact is provided with the second moving contact contact, and the other end of said second moving contact is connected to binding post.Said first and second contacts through with the contact of said fixed contact contact and the said second moving contact contact with separate connection and the disjunction that realizes electric current.The said drive rod that cut-offs is arranged in the said double-contact circuit breaker pivotly; And be configured in the interrupting process of said double-contact circuit breaker, receive the driving of said moving contact rack and turn clockwise, drive thus said second moving contact along being rotated counterclockwise so that the said second moving contact contact away from said second contact.Adopt the asymmetric double-contact circuit breaker of the utility model can guarantee that first contact opens from the fixed contact contact separation prior to second contact; 99% arc energy is placed between first contact and the fixed contact; Like this; Second moving contact leaves from second contact and makes extinguishing of electric arc when the completion of cut-offfing operation, become very easy and stable, can not restrike behind the arc extinction, and the arc extinction time shortens and is stable.
According to an aspect of the utility model, under normal load, said double-contact circuit breaker cut-off operation and closed procedure through operating spring is moved cross said on connecting rod realize.The said drive rod that cut-offs is configured to; Under normal load said operating spring cross said on connecting rod cut-off when operation; Said operating spring drives the said connecting rod of going up and rotates counterclockwise with the tie point that said tripping is connected around the said connecting rod of going up; Drive said lower link and then drive said moving contact rack and said first moving contact clockwise rotates, make said first contact leave said fixed contact contact thus.Said second moving contact is along with said first moving contact clockwise rotates, up to that end that is connected with binding post of said second moving contact against the said drive rod that cut-offs.Subsequently; Said moving contact rack is rotated further to against the said drive rod that cut-offs; Cause said second moving contact under said effect of cut-offfing drive rod, to rotate counterclockwise; Thereby make the said second moving contact contact leave said second contact, realize the operation of cut-offfing of said double-contact circuit breaker under the normal load thus.
Simultaneously; Under normal load said operating spring cross said on connecting rod when carrying out closed procedure; Said operating spring drives the said connecting rod of going up and clockwise rotates with the tie point that said tripping is connected around the said connecting rod of going up; Drive said lower link and then drive said moving contact rack and said first moving contact rotates counterclockwise, make said moving contact rack leave the said drive rod that cut-offs thus.The said drive rod that cut-offs rotates counterclockwise under the effect of clockwise rotating of said second moving contact, contacts said second contact until the said second moving contact contact.Subsequently, said second moving contact rotates counterclockwise and makes that end that is connected with binding post of said second moving contact leave the said drive rod that cut-offs, and the said second moving contact contact contacts with said second contact.Along with said moving contact rack rotates counterclockwise, said first moving contact continues to rotate counterclockwise up to said first contact to contact said fixed contact contact, realizes the closed procedure of said double-contact circuit breaker under the normal load thus.Through cut-offfing the above-mentioned structure and the effect of drive rod, can guarantee that first contact opens from the fixed contact contact separation prior to second contact.
According to an aspect of the utility model, under short circuit condition, the operation of cut-offfing of said double-contact circuit breaker realizes that through making said tripping jump out of said snap close reset operation is realized through making said tripping snap in said snap close.The said drive rod that cut-offs is configured to; Said first moving contact is driven and is clockwise rotated under short circuit condition; And then compress said touch spring and drive said moving contact rack; Said second moving contact makes said second moving contact against the said drive rod that cut-offs along with said first moving contact clockwise rotates.Along with clockwise rotating of said first moving contact; Said lower link also clockwise rotates; Break away from said snap close until said tripping and rotate counterclockwise, the said connecting rod of going up is rotated counterclockwise, and drives said lower link thus and said moving contact rack continues to clockwise rotate; Make said moving contact rack against the said drive rod that cut-offs; Saidly cut-off drive rod and then, cause said second moving contact to rotate counterclockwise and make the said second moving contact contact leave said second contact, realize the operation of cut-offfing of said double-contact circuit breaker under the short circuit condition thus against that end that is connected with binding post of said second moving contact.
During reset operation after short circuit; Making said tripping snap in said snap close clockwise rotates with the tie point that said tripping is connected around the said connecting rod of going up to drive the said connecting rod of going up; Drive said lower link and then drive said moving contact rack and said first moving contact rotates counterclockwise, make said moving contact rack leave the said drive rod that cut-offs thus.The said drive rod that cut-offs rotates counterclockwise under the effect of clockwise rotating of said second moving contact; Contact said second contact until the said second moving contact contact; Said subsequently second moving contact rotates counterclockwise and makes that end that is connected with binding post of said second moving contact leave the said drive rod that cut-offs, and the said second moving contact contact contacts with said second contact.Along with said moving contact rack rotates counterclockwise, said first moving contact continues to rotate counterclockwise up to said first contact to contact said fixed contact contact, realizes the composition operation of said double-contact circuit breaker under the short circuit condition thus.
According to an aspect of the utility model, said double-contact circuit breaker also comprises spacer pin.Said spacer pin is arranged in the said double-contact circuit breaker regularly; And adjacent to said moving contact rack and said second moving contact; The position configuration of said spacer pin becomes; In the interrupting process of said double-contact circuit breaker, that end that is connected with binding post of said second moving contact against said cut-off drive rod in or before, said spacer pin stops the rotation of said second moving contact.Spacer pin is set in the double-contact circuit breaker according to the utility model can guarantees that second moving contact opens from second contact separation.
According to an aspect of the utility model, the brachium of the pivot both sides of said second moving contact does not wait, and the left arm in pivot left side is longer than the right arm on pivot right side, the said left arm that cut-offs drive rod against said second moving contact.It is longer through the left and right sides brachium of the second driving contact is arranged to left arm than right arm; Can guarantee that second moving contact turns clockwise under the short-circuit conditions under the effect of electrodynamic repulsion force, thus keep second moving contact and second contact contact and first contact is left from fixed contact.
According to an aspect of the utility model, the said drive rod that cut-offs is arranged on the fixed support and is that pivot rotates with said fixed support.The said drive rod that cut-offs is set to bending, said two ends of cut-offfing drive rod from its pivot bendingly to extending below.Preferably, the said drive rod that cut-offs forms downward opening C shape or U-shaped or V-arrangement shape.Adopt the drive rod that cut-offs that as above is provided with, can guarantee that second moving contact opens from second contact separation.
These and other purposes, characteristic, aspect and advantage that those skilled in the art will be well understood to the utility model through following detailed description, following detailed description combines accompanying drawing to disclose the preferred embodiment of the utility model.
Description of drawings
The selected embodiment of the utility model is described below with reference to accompanying drawings.Accompanying drawing described here only is schematic purpose, and is not intended to and limits the scope of the present disclosure by any way.Accompanying drawing is the example of the selected instruction of present disclosure, and all possible execution mode is not shown yet.
Figure 1A illustrates the structure chart of existing circuit breaker, and Figure 1B illustrates the structure diagram of existing circuit breaker;
Fig. 2 illustrates the structure chart of existing breaker contact system;
Fig. 3 illustrates the structural representation according to the circuit breaker of the utility model, and the circuit breaker of this moment is in the closed procedure completion status under normal load;
Fig. 4 illustrates the structural representation according to the circuit breaker of the utility model, the circuit breaker of this moment under normal load, be in first contact from fixed contact separately but second contact still with the state of the second moving contact closing of contact;
Fig. 5 illustrates the structural representation according to the circuit breaker of the utility model, and the circuit breaker of this moment is under normal load and cut-offs the operation completion status;
Fig. 6 illustrates the structural representation according to the circuit breaker of the utility model, the circuit breaker of this moment under short circuit condition, be in first contact from fixed contact separately but second contact still with the state of the second moving contact closing of contact;
Fig. 7 illustrates the structural representation according to the circuit breaker of the utility model, and the circuit breaker of this moment is in the state that snap close and tripping are separated under short circuit condition;
Fig. 8 illustrates the structural representation according to the circuit breaker of the utility model, and the circuit breaker of this moment is under short circuit condition and cut-offs the operation completion status.
Embodiment
In order to understand the utility model better, combine Figure 1A and 1B that the structure of circuit breaker of the prior art is described earlier.Figure 1A illustrates the structure chart of existing circuit breaker, and Figure 1B illustrates the structure diagram of existing circuit breaker.Existing circuit breaker comprises tripping 1, snap close 2, goes up connecting rod 3, lower link 4, moving contact rack 5, moving contact 6, first fixed contact 71, second fixed contact 72, touch spring 8, operating spring 9 and mechanism rack 10.The structure diagram of these parts is shown in Figure 1B.
Specifically, tripping 1 is in the top along the vertical direction of Figure 1A of circuit breaker, and is mounted to mechanism rack 10 pivotly through a pivot.Tripping 1 can be rotated counterclockwise or turns clockwise around being installed in pivot on the mechanism rack 10.
Snap close 2 is in the upper right side along the vertical direction of Figure 1A of circuit breaker, can turn clockwise or is rotated counterclockwise around being installed in pivot on the mechanism rack 10.Snap close 2 keeps counterclockwise movement tendency under the effect of snap close torsion spring (not shown), thereby keeps tripping 1 can contact with snap close 2 to stop tripping 2 to be rotated counterclockwise.
The upper end of last connecting rod 3 is through the general middle part of a pivotal connection to tripping 1, and the lower end of last connecting rod 3 is through the upper end of another pivotal connection to lower link 4, and the lower end of lower link 4 is through a pivotal connection to moving contact rack 5.Through above-mentioned interconnective arrangement, quadric chain of moving contact rack 5 and last connecting rod 3 and lower link 4 common compositions.
The two ends of moving contact 6 respectively are provided with moving contact contact 61 and 62.Moving contact rack 5 flexibly is connected to through touch spring 8 near the moving contact contact 61 of moving contact 6, can adopt flexible mode to drive moving contact 6 thus.
First fixed contact 71 and second fixed contact 72 are fixedly mounted in the circuit breaker, and the end of first fixed contact 71 and second fixed contact 72 is respectively equipped with fixed contact contact 711 and 721.The moving contact contact 61 of moving contact 6 can and be separated with fixed contact contact 721 contacts of the fixed contact contact 711 of first fixed contact 71 and second fixed contact 72 with 62.When the moving contact contact 61 of moving contact 6 contacted the fixed contact contact 721 of fixed contact contact 711 and second fixed contact 72 of first fixed contact 71 with 62, the electric current of circuit breaker was connected.When the moving contact contact 61 of moving contact 6 and 62 when separate the fixed contact contact 721 of the fixed contact contact 711 of first fixed contact 71 and second fixed contact 72, the electric current disjunction of circuit breaker.
Operating spring 9 is connected to the tie point that connecting rod 3 and lower link 4 pivots and be connected, through stretching or carry that operating spring 9 can order about whole quadric chain and moving contact moves, thus the closure or the opening operation of realization circuit breaker.
To have the operation principle of circuit breaker below with reference to the block diagram illustrating of the existing circuit breaker shown in Figure 1A and Figure 1B now.
Under normal load, when existing circuit breaker was accomplished closed procedure, electric current was connected.The closed procedure of existing circuit breaker will describe with reference to Figure 1A and Figure 1B.When receiving external force, operating spring 9 does the time spent; Operating spring 9 is rotated counterclockwise around its pivot; A varies to position B from the position; Make operating spring 9 thus and therefore make the spring force direction cross connecting rod 3 and the pivot that tripping 1 is connected, impel last connecting rod 3 to turn clockwise around above-mentioned pivot, driving comprises that the above-mentioned quadric chain of connecting rod 3, lower link 4 and moving contact rack 5 moves.Motion through this quadric chain; Moving contact rack 5 is rotated counterclockwise under the drive of lower link 4; Moving contact 6 is rotated counterclockwise with moving contact rack 5 through touch spring 8 jointly; The moving contact contact 61 of moving contact 6 and 62 contacts with the fixed contact contact 711 of first fixed contact 71 and the fixed contact contact 721 of second fixed contact 72 then, thereby realizes the closed procedure of circuit breaker.
Under normal load, when existing circuit breaker cut-off, electric current cut-off.The operation of cut-offfing of existing circuit breaker describes with reference to Fig. 1.When receiving external force, operating spring 9 does the time spent; Operating spring 9 is rotated counterclockwise around its pivot; B varies to position A from the position; Make operating spring 9 thus and therefore make the spring force direction cross connecting rod 3 and the pivot that tripping 1 is connected, impel last connecting rod 3 to be rotated counterclockwise around above-mentioned pivot, driving comprises that the above-mentioned quadric chain of connecting rod 3, lower link 4 and moving contact rack 5 moves.Motion through this quadric chain; Moving contact rack 5 turns clockwise under the drive of lower link 4; Moving contact 6 turns clockwise with moving contact rack 5 through touch spring 8 jointly; Separate with the fixed contact contact 721 of second fixed contact 72 from the fixed contact contact 711 of first fixed contact 71 with 62 the moving contact contact 61 of moving contact 6 then, thereby realize the operation of cut-offfing of circuit breaker.
Under the situation of short circuit or overload, operation is cut-off electric current thereby circuit breaker need be threaded off, and snap close 2 turns clockwise around its pivot under the effect of instantaneous trip electromagnet or delayed releasing bimetal leaf or other trigger elements at this moment.At this moment, tripping 1 is separated with snap close 2, and tripping 1 is rotated counterclockwise under the effect of the power of operating spring 9; Thereby the balance of above-mentioned quadric chain is broken; Last connecting rod 3 is rotated counterclockwise, and moving contact rack 5 turns clockwise under the drive of lower link 4, realizes the operation of cut-offfing of electric current.
Under especially big short-circuit conditions; Operation is cut-off electric current thereby circuit breaker also need be threaded off; This moment, moving contact 6 received the huge electrodynamic repulsion force that comes from first fixed contact 71 and second fixed contact 72; This repulsion turns clockwise moving contact 6 rapid compression contacts springs 8 to separate with fixed contact 7, thereby cut-offs short circuit current.And then, snap close 2 turns clockwise around its pivot under the effect of instantaneous trip electromagnet or other trigger elements.At this moment; Tripping 1 is separated with snap close 2, and tripping 1 is rotated counterclockwise under the effect of the power of operating spring 9, thereby the balance of above-mentioned quadric chain is broken; Last connecting rod 3 is rotated counterclockwise; Moving contact rack 5 turns clockwise under the drive of lower link 4, realizes the operation of cut-offfing of electric current, makes movable contact for good and all keep cut-offfing the position.
But, when adopting existing circuit breaker, during folding operation under normal load and the situation that all can occur losing efficacy under the short-circuit conditions.Failure phenomenon all shows as a side moving contact contact and burns under normal load and short-circuit conditions.
Failure cause under normal load is following.The contact system of circuit breaker adopts a kind of symmetrical structure, that is, moving contact 6 is symmetrical structures as shown in Figure 2, and moving contact contact 61 and 62 is of similar shape, size and material; Simultaneously, the fixed contact contact 721 of the fixed contact contact 711 of first fixed contact 71 and second fixed contact 72 also be of similar shape, size and material.This symmetrical structure helps balancedly distributing the energy of electric arc on moving contact contact and fixed contact contact when cut-offfing, and makes it receive equal consumption.Yet, because under the actual conditions, desirable symmetry can't realize.On existing circuit breaker, common situation is that one of them moving contact contact separates from fixed contact prior to another moving contact contact, causes the consumption of the moving contact contact that separates earlier to be much higher than design load and to burn inefficacy prematurely.
Failure reasons under short-circuit conditions is following.Undesirable running takes place because of the instability of arc quenching system in electric arc, thereby arc voltage is reduced, and causes the quenching time lengthening, and causes consuming excessively of contact with this.
The problems referred to above that exist in the existing circuit breaker can be resolved through the asymmetric double-contact circuit breaker of the utility model.To be elaborated to the asymmetric double-contact circuit breaker of the utility model with reference to Fig. 3 below.Those skilled in the art can know that from following disclosure the following explanation of the embodiment of the utility model schematically, is not in order to limit the scope of the utility model just.
Similar with existing circuit breaker, comprise tripping 1, snap close 2 equally, go up connecting rod 3, lower link 4, fixed contact 7, touch spring 8, operating spring 9 and mechanism rack (not shown in the structure diagram) according to the asymmetric double-contact circuit breaker of the utility model.Also comprise moving contact rack 51, first moving contact 601, second moving contact 602 and cut-off drive rod 11 according to the asymmetric double-contact circuit breaker of the utility model.
From the aspect of structure, existing circuit breaker comprises two fixed contacts, promptly; First fixed contact and second fixed contact, and include only a fixed contact according to the asymmetric double-contact circuit breaker of the utility model, promptly; Fixed contact 7, this fixed contact are equivalent to first fixed contact in the existing circuit breaker; Existing circuit breaker comprises a moving contact; And comprise two moving contacts according to the asymmetric double-contact circuit breaker of the utility model; I.e. first moving contact 601 and second moving contact 602; Wherein, first moving contact 601 is equivalent to the moving contact in the existing circuit breaker, and second moving contact 602 is in the position of second fixed contact in the existing circuit breaker.In addition, the asymmetric double-contact circuit breaker according to the utility model also comprises moving contact rack 51 and cut-offs bogie 11.To specify the particular location and the syndeton of above-mentioned parts below.
Tripping 1 is in the top along the vertical direction of Fig. 3 of whole pair of contact circuit breaker, and is mounted to mechanism rack pivotly through a pivot.Tripping 1 can rotate counterclockwise or clockwise rotate around the pivot that is installed on the mechanism rack.
Snap close 2 is in the upper right side along the vertical direction of Fig. 3 of whole pair of contact circuit breaker, can clockwise rotate or rotate counterclockwise around the pivot that is installed on the mechanism rack.Snap close 2 is under the effect of snap close torsion spring (not shown), and the trend that maintenance rotates counterclockwise rotates counterclockwise with prevention tripping 2 thereby keep tripping 1 to contact with snap close 2.
One end of last connecting rod 3 is connected in tripping 1 pivotly, and the other end of last connecting rod 3 is connected in an end of lower link 4 pivotly, and the relative other end of lower link 4 is connected in moving contact rack 51 pivotly.Through above-mentioned interconnective arrangement, quadric chain of moving contact rack 51 and last connecting rod 3 and lower link 4 common compositions.
Fixed contact 7 is mounted to the lower left along the vertical direction of Fig. 3 of whole double-contact circuit breaker regularly, and the end of fixed contact 7 is provided with fixed contact contact 701.
Moving contact rack 51 has one and is fixed on the base (not shown) and the pivot shared with first moving contact, and when cut-offfing operation, realizes clockwise rotating through the driving of lower link, when closed procedure, realizes rotating counterclockwise.Moving contact rack 51 realizes that with first moving contact 601 elasticity is connected through touch spring 8.
First moving contact 601 is similar to the moving contact in the existing circuit breaker, flexibly is connected to moving contact rack 51 through touch spring 8.The two ends of this first moving contact 601 are respectively arranged with first contact 611 and second contact 612.
Second moving contact 602 is arranged in the double-contact circuit breaker pivotly, and selectively, second moving contact 602 is arranged on the base (not shown) through a pivot pivotly.One end of second moving contact 602 is provided with the second moving contact contact 622, and the other end links to each other with client's binding post through very soft copper pigtail line (being flexible coupling), thereby makes second moving contact to rotate and do not influence loaded current.Simultaneously, this second moving contact 602 has a torsion spring (not shown), orders about it and clockwise rotates, to guarantee contact pressure.Second moving contact 602 clockwise rotates under the driving of this torsion spring, and enough contact pressures are put on second contact 612.The connection of electric current contacts with fixed contact contact 701 through first contact 611 and second contact 612 contacts with the second moving contact contact 622 and realizes, the disconnection of electric current 701 separates and second contact 612 is separated from the second moving contact contact 622 and realize from the fixed contact contact through making first contact 611.That is to say, first contact 611 and second contact 612 through with the contact of the fixed contact contact 701 and the second moving contact contact 622 with separate connection and the disjunction that realizes electric current.Preferably, it is short that the brachium of the pivot both sides of second moving contact 602 can be arranged to the brachium brachium long, the pivot right side in pivot left side, and promptly the brachium in left side is longer than the brachium on right side, and is schematically illustrated like Fig. 3.Adopt this structure; Under short-circuit conditions; The electrodynamic repulsion force that comes from first moving contact 601 that the left arm of second moving contact 602 receives is greater than right arm, and its force diagram is as shown in Figure 6, and second moving contact 602 receives the clockwise moment of torsion around its pivot that forms because of said electrodynamic repulsion force thus; This moment of torsion is pressed in the right arm of second moving contact 602 on second contact 612 of first moving contact 601 tightly, is convenient to like the back civilian described left arm that drive rod contacts second moving contact 602 that cut-offs.
Cut-off drive rod 11 and be arranged on pivotly in two contact circuit breakers, selectively, cut-off drive rod 11 and have a fixed support and be arranged on pivotly on this fixed support through a pivot.In a preferred embodiment; Cut-off drive rod 11 and be set to bending; The pivot that cut-offs drive rod 11 is in and cut-offs drive rod the highest position vertically, and the two ends height vertically that cut-offs drive rod all is lower than the height of pivot, that is to say; Cut-off drive rod 11 and can form a bar of bending downwards, this cut-offs the formed opening of drive rod 11 bendings and forms towards direction straight down unlimited.Shown in the embodiment among Fig. 3, cut-off drive rod 11 and form downward opening " C " word shape.Selectively, cut-off the shape that drive rod 11 also can form downward opening positive triangle, the base of this positive triangle is opened wide, and perhaps cut-offs drive rod 11 and also can form downward opening U-shaped shape or V-arrangement shape.In general, in the process that circuit breaker cut-offs, cut-off the driving that drive rod 11 can receive moving contact rack 51, drive second moving contact, 602 edges thus and be rotated counterclockwise, thereby make the second moving contact contact 622 away from second contact 612.
The asymmetric double-contact circuit breaker that employing has the utility model of said structure can guarantee that first contact of first moving contact leaves from the fixed contact contact prior to second contact; In first contact after the fixed contact contact is left; Second contact is just left from the second fixed contact contact; Promptly open prior to second contact first contact, and 99% arc energy is placed between first contact and fixed contact contact of first moving contact.When cut-offfing the operation completion, opening of second moving contact makes extinguishing of electric arc become very easy and stable, and can not restrike behind the arc extinction, and the arc extinction time shortens and is stable.
Below will be with reference to the mode of operation of cut-offfing operation and closed procedure each parts and be connected relation of asymmetric double-contact circuit breaker under normal load of Fig. 3 to Fig. 5 explanation according to the utility model.
It is pointed out that under normal load, the double-contact circuit breaker cut-off operation and closed procedure is all realized through operating spring being moved cross connecting rod.When the double-contact circuit breaker cut-offs when operation, operating spring moves operating spring along the direction from left to right of Fig. 3 and crosses connecting rod; When the double-contact circuit breaker carried out closed procedure, operating spring moved operating spring along the dextrosinistral direction of Fig. 3 and crosses connecting rod.
Specifically; When the asymmetric double-contact circuit breaker according to the utility model begins to cut-off operation under normal load; As shown in Figure 3; Operating spring 9 is crossed connecting rod 3 from left to right, and thus, operating spring 9 drivings are gone up connecting rod 3 and rotated counterclockwise with the tie point that tripping 1 is connected around last connecting rod 3.This rotate counterclockwise can drive lower link 4 and and then drive moving contact rack 51 and first moving contact 601 clockwise rotates, as shown in Figure 4, make first contact 611 of the moving contact 601 of winning leave fixed contact contact 701 like this.Because 612 contacts, the second moving contact contact 622, second contact of first moving contact 601 under the initial condition; Second moving contact 602 receives the torsion spring effect simultaneously; So second moving contact 602 also clockwise rotates along with first moving contact 601, up to that end that is connected with binding post of second moving contact 602 against cut-offfing drive rod 11.Under the abutment action of cut-offfing drive rod 11; Second moving contact 602 will stop operating temporarily; The second moving contact contact 622 will still contact second contact 612 this moment; Perhaps possibly under the abutment action of cut-offfing drive rod 11, leave second contact 612 a little, but the second moving contact contact 622 and second contact 612 are separated fully.In general, cut-off the left arm of drive rod 11 against second moving contact 602.
Subsequently, as shown in Figure 5, moving contact rack 51 continues to clockwise rotate until contacting against cut-offfing drive rod 11.Under the abutment action of moving contact rack 51; Cut-offfing drive rod 11 clockwise rotates and contacts subsequently against the left arm of second moving contact 602; Second moving contact 602 rotates counterclockwise under the abutment action of cut-offfing drive rod 11; Thereby make the second moving contact contact 622 leave second contact 612 fully, realize the operation of cut-offfing of double-contact circuit breaker under the normal load thus.
In a preferred embodiment, the double-contact circuit breaker can also optionally comprise spacer pin 12.Spacer pin 12 can be arranged in the double-contact circuit breaker regularly, adjacent to cut-offfing the drive rod 11 and second moving contact 602.The effect of this spacer pin 12 mainly is to receive when stopping operating under the abutment action of cut-offfing drive rod 11 at second moving contact 602 withstanding second moving contact 602 temporarily, prevents that second moving contact 602 is rotated further.Therefore; The position of this spacer pin 12 can be configured to; In the interrupting process of double-contact circuit breaker, at that end that is connected with binding post of second moving contact 602 when cut-offfing drive rod 11 or before, spacer pin 12 can stop the rotation of second moving contact 602.Selectively, spacer pin 12 is arranged on the top of that end that is connected with binding post of second moving contact 602, and adjacent to cut-offfing drive rod 11, still cut-offfing drive rod 11 can not meet this spacer pin 12.
When the asymmetric double-contact circuit breaker according to the utility model begins to carry out closed procedure under normal load; Initial condition is as shown in Figure 5; Separate fully the second moving contact contact 622 and second contact 612, and separate fully the fixed contact contact 701 and first contact 611.In order to realize closed procedure; Make operating spring 9 cross connecting rod 3 from right to left; Driving upward thus, connecting rod 3 clockwise rotates with the tie point that tripping 1 is connected around last connecting rod 3; Drive lower link 4 and then drive moving contact rack 51 and first moving contact 601 and rotate counterclockwise, as shown in Figure 4, make moving contact rack 51 leave like this and cut-off drive rod 11.Because moving contact rack 51 leaves and cut-offs drive rod 11; So cut-off that drive rod 11 no longer receives the power that leans of moving contact rack 51 or against power; Cause and cut-off weakening against power of 11 pairs second moving contacts 602 of drive rod, second moving contact 602 will clockwise rotate around its pivot.Cut-off drive rod 11 and under the effect of clockwise rotating of second moving contact 602, rotate counterclockwise, contact second contact 612 of first moving contact 601 until the second moving contact contact 622 gradually.At this moment, that end that is connected with binding post of second moving contact is resisted against reaction and cut-offs drive rod 11.
Subsequently; Along with first moving contact 601 rotates counterclockwise; Under the effect of second contact 612 of first moving contact 601; Second moving contact 602 rotates counterclockwise that end that is connected with binding post that makes second moving contact and leaves fully and cut-off drive rod 11, and little by little, the second moving contact contact 622 contacts with second contact 612.Along with moving contact rack 51 rotates counterclockwise; First moving contact 601 continues to rotate counterclockwise and contacts fixed contact contact 701 fully up to first contact 611 and the second moving contact contact 622 contacts second contact 612 fully; Form the state that first moving contact 601 and second moving contact 602 are in the direction of general level; As shown in Figure 3, realize the closed procedure of double-contact circuit breaker under the normal load thus.Can know that as above the closed procedure of double-contact circuit breaker is equivalent to cut-off the inverse process of operation basically.
With cut-off like the class of operation; If in being provided with the preferred embodiment of spacer pin; When cut-offfing weakening and second moving contact 602 when clockwise rotating of 11 pairs second moving contacts 602 of drive rod around its pivot against power; That end that is connected with binding post of second moving contact is resisted against when cut-offfing drive rod 11; Can also receive the abutment action of spacer pin 12, thereby guarantee that the second moving contact contact 622 under the effect of second contact 612 of first moving contact 601, rotates along with rotating counterclockwise of first moving contact 601.
Below will be with reference to Fig. 6 to Fig. 8 explanation according to the asymmetric double-contact circuit breaker of the utility model in mode of operation and the relation of being connected that cut-offfing each parts during operation and the reset operation under the short circuit condition.
Under short circuit condition, the operation of cut-offfing of double-contact circuit breaker realizes that through making tripping jump out of snap close reset operation is realized through making tripping snap in snap close.
As shown in Figure 6, short circuit current first and second moving contacts 601 and 602 and fixed contact 7 between and produce big electrodynamic repulsion force between first moving contact 601 and second moving contact 602, order about first moving contact, 601 compression contacts springs 8 and clockwise rotate.Simultaneously, second moving contact 602 also clockwise rotates under the effect of formed clockwise moment of torsion and torsion spring because of electrodynamic repulsion force, rotates thereby follow first moving contact 601.Along with clockwise rotating of first moving contact 601, fixed contact contact 701 is left in first contact 611 of first moving contact 601.
As shown in Figure 7; Clockwise rotating of first moving contact 601 also makes first moving contact, 601 compression contacts springs 8 drive moving contact rack 51; Second moving contact 602 contacts against cut-offfing drive rod 11 second moving contact 602 along with first moving contact 601 clockwise rotates gradually simultaneously.Along with clockwise rotating of first moving contact 601, lower link 4 also clockwise rotates.At this moment; Snap close 2 clockwise rotates around its pivot under the effect of instantaneous trip electromagnet or other trigger elements, and its snap close 2 is separated with tripping 1; Thereby the balance of the quadric chain that comprises connecting rod, lower link and moving contact rack is broken; Last connecting rod 3 is rotated counterclockwise, and drives lower link 4 and continues to clockwise rotate with moving contact rack 51, makes moving contact rack 51 against cut-offfing drive rod 11.Thus; As shown in Figure 8; Under the effect of moving contact rack 51, cut-off drive rod 11 and clockwise rotate, and then against that end that is connected with binding post of second moving contact; Cause second moving contact 602 to rotate counterclockwise and make the second moving contact contact 622 quicken to leave second contact 612, realize the operation of cut-offfing of double-contact circuit breaker under the short circuit condition thus.
In a preferred embodiment of the utility model, the brachium of the left and right sides of the pivot of second moving contact 602 is different.In this case; When short circuit current occurring, because its left and right sides brachium is different, as shown in Figure 6; Electrodynamic repulsion force F1＞the F2 that comes from first moving contact 601 that left and right sides arm is suffered, thus the moment of impelling second moving contact 602 to clockwise rotate formed.Through this set, can more easily keep the second moving contact contact 622 to contact, so that second moving contact 602 can clockwise rotate along with first moving contact 601 with second contact 612.
If in being provided with the preferred embodiment of spacer pin; When cut-offfing weakening and second moving contact 602 when clockwise rotating of 11 pairs second moving contacts 602 of drive rod around its pivot against power; That end that is connected with binding post of second moving contact is resisted against when cut-offfing drive rod 11; The abutment action that can also receive spacer pin 12 is with stop motion; Thereby guarantee that the second moving contact contact 622 under the effect of second contact 612 of first moving contact 601, rotates along with rotating counterclockwise of first moving contact 601.
When after the asymmetric double-contact circuit breaker according to the utility model cut-offs, carrying out reset operation under overload or short-circuit conditions; Initial condition is as shown in Figure 8; Tripping 1 breaks away from snap close 2 fully; The second moving contact contact 622 and second contact 612 break away from fully, and the fixed contact contact 701 and first contact 611 break away from fully.
In order to carry out reset operation; Stirring the operating grip (not shown) impels tripping 1 to snap in snap close 2 gradually; Driving upward thus, connecting rod 3 clockwise rotates with the tie point that tripping 1 is connected around last connecting rod 3; Drive lower link 4 and then drive moving contact rack 51 and first moving contact 601 and rotate counterclockwise, as shown in Figure 7, make moving contact rack 51 leave like this and cut-off drive rod 11.Because moving contact rack 51 leaves and cut-offs drive rod 11, so cut-off will weakening against power of 11 pairs second moving contacts 602 of drive rod, second moving contact 602 will clockwise rotate around its pivot.Cut-off drive rod 11 and under the effect of clockwise rotating of second moving contact 602, rotate counterclockwise, contact second contact 612 of first moving contact 601 until the second moving contact contact 622 gradually.At this moment, that end that is connected with binding post of second moving contact is resisted against reaction and cut-offs drive rod 11.
Subsequently; Along with first moving contact 601 rotates counterclockwise; Under the effect of second contact 612 of first moving contact 601; Second moving contact 602 rotates counterclockwise that end that is connected with binding post that makes second moving contact and leaves fully and cut-off drive rod 11, and little by little, the second moving contact contact 622 contacts with second contact 612.Along with moving contact rack 51 rotates counterclockwise; First moving contact 601 continues to rotate counterclockwise and contacts fixed contact contact 701 fully up to first contact 611 and the second moving contact contact 622 contacts second contact 612 fully; Form the state that first moving contact 601 and second moving contact 602 are in the direction of general level; As shown in Figure 6, realize the closed procedure of double-contact circuit breaker under the normal load thus.Can know that as above the reset operation of double-contact circuit breaker is equivalent to cut-off the inverse process of operation basically.
With cut-off like the class of operation; If in being provided with the preferred embodiment of spacer pin; When cut-offfing weakening and second moving contact 602 when clockwise rotating of 11 pairs second moving contacts 602 of drive rod around its pivot against power; That end that is connected with binding post of second moving contact is resisted against when cut-offfing drive rod 11; Can also receive the abutment action of spacer pin 12, thereby guarantee that the second moving contact contact 622 under the effect of second contact 612 of first moving contact 601, rotates along with rotating counterclockwise of first moving contact 601.Structure and annexation according to the asymmetric double-contact circuit breaker of the utility model have been described above through description to the embodiment of the utility model, and each parts under normal load with short-circuit conditions under the process of operating.But, it will be appreciated by those skilled in the art that the utility model in application process, be not restricted to as above describe in details and configuration of components that propose or structure illustrated in the accompanying drawings.The utility model also can adopt the embodiment except the foregoing description, and can implement by different way and carry out.In addition, it will be appreciated by those skilled in the art that at the wording of this employing and term and summary be for purpose of description, rather than the utility model is carried out any qualification.
The term that here uses only is in order to describe the purpose of specific examples, not to be intended to restrictive.As here use, " one " and " said " can be intended to comprise a plurality of, only if context clearly demonstrates in addition.Term " comprises ", " having " is open; Therefore specify the existence of characteristic, integer, step, operation, element and/or the parts claimed, but do not get rid of the existence or the adding of one or more further features, integer, step, operation, element, parts and/or its combination.Method step, technology and the operation of here describing should not be construed as must need them to carry out with the specific order of discussing or illustrate, unless stated otherwise execution sequence.Be further appreciated that other or the step that substitutes also can adopt.
Though term first, second, third grade can be used herein to each element, parts, zone, layer and/or part are described,, these elements, parts, zone, layer and/or part should not receive the restriction of these terms.These terms can only be used to distinguish an element, parts, zone, layer and/or part and another zone, layer or part.For example the term of " first ", " second " and other numerical value term when when this uses and do not mean that order and/or the order, only if context clearly demonstrates in addition.Like this, first element that is discussed below, parts, zone, layer or part can be expressed as second element, parts, area level or part, and can not break away from the instruction of exemplary embodiment.
Space relativity term, for example " interior ", " outward ", " under ", " following ", D score, " top ", " on " etc. here can use to describe an element or characteristic with respect to another element as shown in the figure or the relation of characteristic for the ease of description.Space relativity term can be intended to comprise the different device direction in using or operating the direction of in figure, describing.For example, if device is in the drawings turned around, be described as to be oriented to then in other element or characteristic " top " at the element of other element or characteristic " below " perhaps " under ".Like this, exemplary term " following " can comprise top and following two kinds of directions.Device can other orientation (revolve turn 90 degrees or in other direction), and the relativity descriptive language will be explained accordingly in the space of this use.
Claims (10)
1. asymmetric double-contact circuit breaker, said double-contact circuit breaker comprise first moving contact, fixed contact, touch spring, moving contact rack, go up connecting rod, lower link, tripping, snap close and mechanism rack,
The two ends of said first moving contact are provided with first contact and second contact respectively, and said first moving contact flexibly is connected to said moving contact rack through said touch spring,
Said moving contact rack has and the shared pivot of said first moving contact,
Said fixed contact is mounted to said double-contact circuit breaker regularly, and said fixed contact is provided with the fixed contact contact,
A said end of going up connecting rod is connected in said tripping pivotly, and the said other end of going up connecting rod is connected in an end of said lower link pivotly, and the other end of said lower link is connected in said moving contact rack pivotly,
Said tripping and said snap close are mounted to said mechanism rack pivotly,
It is characterized in that said double-contact circuit breaker also comprises second moving contact and cut-off drive rod,
Said second moving contact is arranged in the said double-contact circuit breaker pivotly, and an end of said second moving contact is provided with the second moving contact contact, and the other end of said second moving contact is connected to binding post,
Said first and second contacts through with the contact of said fixed contact contact and the said second moving contact contact with separate connection and the disjunction that realizes electric current,
The said drive rod that cut-offs is arranged in the said double-contact circuit breaker pivotly; And be configured in the interrupting process of said double-contact circuit breaker, receive the driving of said moving contact rack and turn clockwise, drive thus said second moving contact along being rotated counterclockwise so that the said second moving contact contact away from said second contact.
2. asymmetric double-contact circuit breaker according to claim 1 is characterized in that, under normal load, said double-contact circuit breaker cut-off operation and closed procedure through operating spring is moved cross said on connecting rod realize.
3. asymmetric double-contact circuit breaker according to claim 2; It is characterized in that; The said drive rod that cut-offs is configured to, under normal load said operating spring cross said on connecting rod cut-off when operation, said operating spring drives the said connecting rod of going up and rotates counterclockwise with the tie point that said tripping is connected around the said connecting rod of going up; Drive said lower link and then drive said moving contact rack and said first moving contact clockwise rotates; Make said first contact leave said fixed contact contact thus, said second moving contact is along with said first moving contact clockwise rotates, up to that end that is connected with binding post of said second moving contact against the said drive rod that cut-offs; Said subsequently moving contact rack is rotated further to against the said drive rod that cut-offs; Cause said second moving contact under said effect of cut-offfing drive rod, to rotate counterclockwise, thereby make the said second moving contact contact leave said second contact, realize the operation of cut-offfing of said double-contact circuit breaker under the normal load thus.
4. asymmetric double-contact circuit breaker according to claim 2; It is characterized in that; The said drive rod that cut-offs is configured to; Under normal load said operating spring cross said on connecting rod when carrying out closed procedure, said operating spring drives the said connecting rod of going up and clockwise rotates with the tie point that said tripping is connected around the said connecting rod of going up, and drives said lower link and then drives said moving contact rack and said first moving contact rotates counterclockwise; Make said moving contact rack leave the said drive rod that cut-offs thus; The said drive rod that cut-offs rotates counterclockwise under the effect of clockwise rotating of said second moving contact, contacts said second contact until the said second moving contact contact, and said subsequently second moving contact rotates counterclockwise and makes that end that is connected with binding post of said second moving contact leave the said drive rod that cut-offs; The said second moving contact contact contacts with said second contact; Along with said moving contact rack rotates counterclockwise, said first moving contact continues to rotate counterclockwise up to said first contact to contact said fixed contact contact, realizes the closed procedure of said double-contact circuit breaker under the normal load thus.
5. asymmetric double-contact circuit breaker according to claim 1; It is characterized in that; Under short circuit condition, the operation of cut-offfing of said double-contact circuit breaker realizes that through making said tripping jump out of said snap close reset operation is realized through making said tripping snap in said snap close.
6. asymmetric double-contact circuit breaker according to claim 5; It is characterized in that the said drive rod that cut-offs is configured to, said first moving contact is driven and is clockwise rotated under short circuit condition; And then compress said touch spring and drive said moving contact rack; Said second moving contact makes said second moving contact against the said drive rod that cut-offs, along with clockwise rotating of said first moving contact along with said first moving contact clockwise rotates; Said lower link also clockwise rotates; Break away from said snap close until said tripping and rotate counterclockwise, the said connecting rod of going up is rotated counterclockwise, and drives said lower link thus and said moving contact rack continues to clockwise rotate; Make said moving contact rack against the said drive rod that cut-offs; Saidly cut-off drive rod and then, cause said second moving contact to rotate counterclockwise and make the said second moving contact contact leave said second contact, realize the operation of cut-offfing of said double-contact circuit breaker under the short circuit condition thus against that end that is connected with binding post of said second moving contact.
7. according to the described asymmetric double-contact circuit breaker of aforementioned arbitrary claim; It is characterized in that; Said double-contact circuit breaker also comprises spacer pin, and said spacer pin is arranged in the said double-contact circuit breaker regularly, and adjacent to said drive rod and said second moving contact of cut-offfing; The position configuration of said spacer pin becomes; In the interrupting process of said double-contact circuit breaker, that end that is connected with binding post of said second moving contact against said cut-off drive rod in or before, said spacer pin stops the rotation of said second moving contact.
8. asymmetric double-contact circuit breaker according to claim 7; It is characterized in that; The brachium of the pivot both sides of said second moving contact does not wait, and the left arm in pivot left side is longer than the right arm on pivot right side, the said left arm that cut-offs drive rod against said second moving contact.
9. asymmetric double-contact circuit breaker according to claim 7; It is characterized in that; The said drive rod that cut-offs is arranged on the fixed support and is that pivot rotates with said fixed support; The said drive rod that cut-offs is set to bending, said two ends of cut-offfing drive rod from its pivot bendingly to extending below.
10. asymmetric double-contact circuit breaker according to claim 9 is characterized in that, the said drive rod that cut-offs forms downward opening C shape or U-shaped or V-arrangement shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204115985U CN202423166U (en) | 2011-10-25 | 2011-10-25 | Asymmetric double-contact circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204115985U CN202423166U (en) | 2011-10-25 | 2011-10-25 | Asymmetric double-contact circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN202423166U true CN202423166U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204115985U Withdrawn - After Issue CN202423166U (en) | 2011-10-25 | 2011-10-25 | Asymmetric double-contact circuit breaker |
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| CN (1) | CN202423166U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077856A (en) * | 2011-10-25 | 2013-05-01 | 施耐德电器工业公司 | Asymmetric double-contact breaker |
| CN107329495A (en) * | 2017-08-03 | 2017-11-07 | 中国石油集团长城钻探工程有限公司 | A kind of signal detecting method based on unbalanced double contact switch |
| CN107946843A (en) * | 2017-12-18 | 2018-04-20 | 佛山市顺德区澳骏电子科技有限公司 | A kind of three poles power-off leakage protecting plug |
| CN110660607A (en) * | 2019-09-30 | 2020-01-07 | 顾天琪 | Bridge type contact load switch and smart electric meter |
-
2011
- 2011-10-25 CN CN2011204115985U patent/CN202423166U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077856A (en) * | 2011-10-25 | 2013-05-01 | 施耐德电器工业公司 | Asymmetric double-contact breaker |
| CN103077856B (en) * | 2011-10-25 | 2015-03-04 | 施耐德电器工业公司 | Asymmetric double-contact breaker |
| CN107329495A (en) * | 2017-08-03 | 2017-11-07 | 中国石油集团长城钻探工程有限公司 | A kind of signal detecting method based on unbalanced double contact switch |
| CN107946843A (en) * | 2017-12-18 | 2018-04-20 | 佛山市顺德区澳骏电子科技有限公司 | A kind of three poles power-off leakage protecting plug |
| CN107946843B (en) * | 2017-12-18 | 2024-03-22 | 佛山市顺德区澳骏电子科技有限公司 | Tripolar outage earth leakage protection plug |
| CN110660607A (en) * | 2019-09-30 | 2020-01-07 | 顾天琪 | Bridge type contact load switch and smart electric meter |
| CN110660607B (en) * | 2019-09-30 | 2021-06-25 | 顾天琪 | Bridge type contact load switch and smart electric meter |
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Granted publication date: 20120905 Effective date of abandoning: 20150304 |
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