CN204303730U - The structure of contact terminal of air-break and contact system - Google Patents
The structure of contact terminal of air-break and contact system Download PDFInfo
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- CN204303730U CN204303730U CN201520049853.4U CN201520049853U CN204303730U CN 204303730 U CN204303730 U CN 204303730U CN 201520049853 U CN201520049853 U CN 201520049853U CN 204303730 U CN204303730 U CN 204303730U
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- fingertip
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Abstract
The utility model discloses a kind of structure of contact terminal and contact system of air-break, and the structure of contact terminal of air-break comprises the arc fingertip of at least one contact higher than other fingertips, and the decrement when closing a floodgate of the touch spring corresponding to arc fingertip is larger; When separating brake; after general fingertip starts disjunction; touch spring corresponding to arc fingertip due to decrement larger; still be in the state recovering deformation; therefore the contact on arc fingertip and the general fingertip of stationary contact segregation ratio are a little later; the effect that time delay is thrown off can be brought; when such breaker is short-circuited by larger current generation separating brake; contact on arc fingertip and the time delay disjunction effect between stationary contact make KA Rms Icw extend; divide and can reduce in lock process the scaling loss of other fingertips and silver point, thus improve the performance of circuit breaker short circuit protection.
Description
Technical field
The utility model relates to a kind of structure of contact terminal and contact system of air-break, belongs to low voltage electrical apparatus technology field.
Background technology
What require power supply and equipment for power transmission and distribution along with power engineering improves constantly, also more and more higher to the performance requirement for circuit protecting switch, and miniaturization, high-performance, modularization, high reliability are the main development directions of present stage air-break.Wherein, specified ultimate short-circuit breaking capacity Icu, specified running and positioning Ics and specified KA Rms (hereinafter referred to as Icw) are three large technical indicators of air-break, can Icw parameter index improve is that can short circuit breaking index accomplish the key factor that Icu=Ics=Icw tri-parameters are consistent, also be the key factor that can improve contact system breaking capacity, as everyone knows, increase fingertip quantity and can effectively reduce electrodynamic repulsion force, and then make breaker under the condition not improving contact terminate pressure, can by higher Icw, but do not increasing in breaker volume situation, the scheme of this increase fingertip quantity will certainly cause fingertip thickness to reduce, and then cause to be positioned at below fingertip and too reduce for laying touch spring space, the ratio of height to diameter of spring increases, touch spring easily lost efficacy, touch spring will cause contact terminate pressure to diminish after losing efficacy, Icw is caused to reduce, the mode of obvious above-mentioned raising Icw is worthless, thus, in prior art, the general mode reducing Icu with Ics value that adopts makes Icu=Ics=Icw three consistent, and do not have effectively to carry out from structure the technical scheme improving to make Icu=Ics=Icw three consistent, this has had a strong impact on the breaking capacity of contact system.
Utility model content
Therefore, the technical problems to be solved in the utility model is the lower technological deficiency causing breaking capacity low of the Icw of contact system of the prior art, thus provides a kind of Icw value that improves to improve the structure of contact terminal of the air-break of breaking capacity.
For solving the problems of the technologies described above, the utility model provides a kind of structure of contact terminal of air-break, comprise: contact support, be articulated in described contact support on multiple fingertip and isolation grid, described fingertip is divided into some groups by described isolation grid, often organize described fingertip to be connected with described contact support by least one group of touch spring, fingertip described at least one is for the contact on it is higher than the arc fingertip of the contact on fingertip described in other.
In the structure of contact terminal of above-mentioned air-break, described contact support forms guide frame, described arc fingertip forms the location structure coordinated with described guide frame, under the effect of described touch spring, location structure coordinates with described guide frame, to make the contact of described arc fingertip higher than the contact on fingertip described in other.
In the structure of contact terminal of above-mentioned air-break, described guide frame is the direction recess of skewed slot shape, described direction recess is with one end of close described arc fingertip rotating shaft for original position extends to form to the end position direction away from described rotating shaft, and the groove depth of described direction recess is deepened gradually by described original position to described end position.
In the structure of contact terminal of above-mentioned air-break, described guide frame comprises direction recess and is positioned at the protuberance in direction recess centre position, and described direction recess is divided into two recess by described protuberance.
In the structure of contact terminal of above-mentioned air-break, described protuberance is arc, and the female portion is the groove had at the bottom of straight-line groove.
In the structure of contact terminal of above-mentioned air-break, described location structure is be applicable to groove and the projection that coupling embeds described protuberance and the female portion.
In the structure of contact terminal of above-mentioned air-break, described fingertip and/or the corresponding described touch spring of described arc fingertip form and are applicable to snapping in the positioning convex in described touch spring, and the applicable described touch spring being positioned at described positioning convex both sides snaps in the detent of location.
In the structure of contact terminal of above-mentioned air-break, described contact support forms the touch spring groove for holding described touch spring one end, each is organized described touch spring and is separately positioned in a described touch spring groove.
In the structure of contact terminal of above-mentioned air-break, each is organized described touch spring and comprises cycle spring and at least one in coil spring coaxial mounted with described cycle spring.
A kind of contact system of air-break, comprise the structure of contact terminal of above-mentioned air-break, also comprise the clamping plate supported for described fingertip and described arc fingertip being clamped to described contact, the end of described fingertip and described arc fingertip to be connected with busbar by being flexible coupling.
Technique scheme of the present utility model has the following advantages compared to existing technology:
1. in the structure of contact terminal of air-break of the present utility model, comprise the arc fingertip of at least one contact higher than other fingertips, the decrement when closing a floodgate of the touch spring corresponding to arc fingertip is larger; When separating brake; after general fingertip starts disjunction; touch spring corresponding to arc fingertip due to decrement larger; still be in the state recovering deformation; therefore the contact on arc fingertip and the general fingertip of stationary contact segregation ratio are a little later; the effect that time delay is thrown off can be brought; when such breaker is short-circuited by larger current generation separating brake; contact on arc fingertip and the time delay disjunction effect between stationary contact make KA Rms Icw extend; divide and can reduce in lock process the scaling loss of other fingertips and silver point, thus improve the performance of circuit breaker short circuit protection.
2. in the structure of contact terminal of air-break of the present utility model, each group touch spring comprises cycle spring and at least one in coil spring coaxial mounted with described cycle spring, be that outer ring and interior coil spring are coaxially installed owing to often organizing touch spring, such set-up mode can increase the central diameter of spring compared to structure conventional in prior art, contribute to the ratio of height to diameter reducing spring, improve the service life of spring; Touch spring acts on the end pressure that one group of fingertip or arc fingertip also can increase fingertip and arc fingertip upper contact in coaxially sheathed mode simultaneously, to ensure that contact is stablized.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein,
Fig. 1 is the structural representation of the contact system of air-break of the present utility model;
Fig. 2 is the structural representation that in the utility model, contact is supported;
Fig. 3 is that the structural representation of touch spring has been installed in contact support of the present utility model;
Fig. 4 is the generalized section that contact of the present utility model is supported, also show the set-up mode of the guide frame in embodiment 1;
Fig. 5 is the generalized section that contact of the present utility model is supported, also show the set-up mode of the guide frame in embodiment 2;
Fig. 6 is the first structural representation of arc fingertip of the present utility model;
Fig. 7 is the second structural representation of arc fingertip of the present utility model;
Fig. 8 is the third structural representation of arc fingertip of the present utility model.
Description of reference numerals
10-contact is supported; 11-fingertip; 12-isolates grid; 13-touch spring; 11a-arc fingertip; 111-positioning convex; 112-detent; 14-guide frame; 141-protuberance; 142-recess; 15-touch spring groove; 20-clamping plate; 30-is flexible coupling; 40-busbar.
Detailed description of the invention
Below with reference to accompanying drawing, the structure of contact terminal of air-break of the present utility model and contact system are described in detail.
Embodiment 1
The present embodiment provides a kind of structure of contact terminal of air-break, KA Rms Icw (hereinafter referred to as the Icw) index of breaker can be improved, with reference to figure 1-3, it comprises contact and supports 10, fingertip 11 and isolation grid 12, contact support 10 is installation foundation of fingertip 11, multiple fingertip 11 is articulated in contact by rotating shaft and supports on 10, in contact support 10 one-body molded or be fixedly installed isolation grid 12, above-mentioned multiple fingertip 11 is divided into some groups by isolation grid 12, the quantity of described isolation grid 12 and fingertip 11 is according to actual user demand, those skilled in the art can make corresponding suitably selection.Correspondence often organizes fingertip 11, has at least one group of touch spring 13 to be connected with contact support 10 by fingertip 11, and this touch spring 13 pairs of fingertips 11 bestow thrust, thus when ensureing breaker closing, the contact on fingertip 11 can obtain certain end pressure.
In the present embodiment, fingertip 11 described at least one is for the contact on it is higher than the arc fingertip 11a of the contact on fingertip described in other 11.Described " higher than " refer in the direction of rotation when fingertip 11 closes a floodgate of contact on arc fingertip 11a, before being positioned at the contact of fingertip 11 described in other.Like this, during combined floodgate, first the contact on arc fingertip 11a contacts with stationary contact, and the decrement when closing a floodgate of the touch spring 13 corresponding to arc fingertip 11a is larger; When separating brake, after general fingertip 11 starts disjunction, the touch spring 13 corresponding to arc fingertip 11a is comparatively large due to decrement, is still in the state recovering deformation, therefore the contact on arc fingertip 11a and stationary contact disengaging time than general fingertip 11 a little later, can bring the effect that time delay is thrown off.When such breaker is short-circuited by larger current generation separating brake, the contact on arc fingertip 11a and the time delay disjunction effect between stationary contact make KA Rms Icw be worth to extend.
The described arc fingertip 11a of the present embodiment is before by the angle that deflects than general fingertip 11, the contact realized on arc fingertip 11a is positioned at the contact of all the other fingertips 11 more greatly.
The contact support 10 of the present embodiment and the set-up mode of arc fingertip 11a is described in detail below in conjunction with Fig. 2, Fig. 4, Fig. 6, Fig. 8:
In the present embodiment, with reference to figure 2, described contact support 10 forms guide frame 14, the end of the corresponding fingertip 11 of described guide frame 14, arc fingertip 11a can be made larger than general fingertip 11 anglec of rotation along guide frame 14 under the thrust of touch spring 13, to make the contact of described arc fingertip 11a higher than the contact on fingertip described in other 11.Described arc fingertip 11a forms the location structure coordinated with described guide frame 14, under the effect of described touch spring 13, location structure coordinates with described guide frame 14, so that arc fingertip 11a is more stable rotatably.Although in fig. 2, described guide frame 14 is positioned at the centre position that contact supports 10, and guide frame 14 is not limited in this setup, and the position of guide frame 14 is freely, and it can be that corresponding any a group or a fingertip 11 is arranged.
As a kind of embodiment, with reference to figure 4, described guide frame 14 is the direction recess of skewed slot shape, described direction recess with near one end of described arc fingertip 11a rotating shaft for original position extends to form to the one end away from described rotating shaft for end position, the groove depth of described direction recess is deepened gradually by described original position to described end position.Now, location structure on described arc fingertip 11a can be the straight tabular shown in Fig. 6, Fig. 8, the setting of described direction recess, the end of fingertip 11 can further rotate under the thrust of touch spring 13, formed as shown in Figure 1, contact is higher than the arc fingertip 11a of other fingertip 11 upper contacts.
In the present embodiment, often organize described touch spring 13 and often organize described fingertip 11 one_to_one corresponding and arranges, when described arc fingertip 11a be set to separately one or more groups time, touch spring 13 and often organize arc fingertip 11a one_to_one corresponding.When described arc fingertip 11a is less than one group, adjacent arc fingertip 11a is promoted by same or multiple spring.Do not repeat one by one at this.Simultaneously, it will be appreciated that, touch spring 13 meets and can promote fingertip 11 and the contact on arc fingertip 11a and contact with stationary contact and provide certain end pressure, and its concrete set-up mode is diversified, and those skilled in the art can carry out routine selection according to demand.
Embodiment 2
The present embodiment is the improvement on embodiment 1 basis, with reference to figure 5, Fig. 7, the difference of the present embodiment and embodiment 1 is: described guide frame 14 comprises direction recess and is positioned at the protuberance 141 in direction recess centre position, described direction recess is divided into two recess 142 by described protuberance 141, described protuberance 141 is arc, the female portion 142 is for having the groove at the bottom of straight-line groove, described location structure is be applicable to groove and the projection that coupling embeds described protuberance 141 and the female portion 142, under the thrust of touch spring 13, arc fingertip 11a rotates around the shaft, groove on it snaps on described protuberance 141, further rotate relative to other fingertip 11 to enable arc fingertip 11a, described protuberance 141 and the female portion 142 are arranged so that arcing contact 11a is convenient to location after rotating.
Embodiment 3
The present embodiment is the improvement in embodiment 1 or embodiment 2 basis, the difference of the present embodiment and above-described embodiment is: with reference to figure 6-8, described fingertip 11 and/or the corresponding described touch spring 13 of described arc fingertip 11a form and are applicable to snapping in the positioning convex 111 in described touch spring 13, and the applicable described touch spring 13 being positioned at described positioning convex 111 both sides snaps in the detent 112 of location, described positioning convex 111 stretches in the inner ring of described touch spring 13, so that described touch spring 13 in force process can relatively described fingertip 11 and/or described arc fingertip 11a relatively fixing, fingertip 11 and/or arc fingertip 11a are not easy to depart from touch spring 13.As shown in Figure 8, in order to further fixed contact spring 13, fingertip 11 and/or arc fingertip 11a are also provided with the detent 112 for holding touch spring 13 in the both sides of described positioning convex 111.
In the present embodiment, with reference to figure 2, Fig. 3, described contact support 10 forms the touch spring groove 15 for holding described touch spring 13 one end, each is organized described touch spring 13 and is separately positioned in a described touch spring groove 15.
Further, each is organized described touch spring 13 and comprises cycle spring and at least one in coil spring coaxial mounted with described cycle spring, coaxially install for outer ring and interior coil spring owing to often organizing described touch spring 13, such set-up mode is compared to structure conventional in prior art, the central diameter of spring can be increased, contribute to the ratio of height to diameter reducing spring, improve the service life of spring; The touch spring 13 of the present embodiment acts on one group of fingertip 11 or arc fingertip 11a in coaxially sheathed mode, adds the end pressure of fingertip 11 and arc fingertip 11a, to ensure that contact is stablized, reduces contact resistance.
Embodiment 4
The present embodiment provides a kind of contact system of air-break, comprise the structure of contact terminal of arbitrary described air-break in embodiment 1, embodiment 2, with reference to figure 1, also comprise the clamping plate 20 supporting on 10 for described fingertip 11 and described arc fingertip 11a being clamped to described contact, the end of described fingertip 11 and described arc fingertip 11a 30 to be connected with busbar 40 by being flexible coupling.
Obviously, above-described embodiment is only for clearly example being described, the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (10)
1. the structure of contact terminal of an air-break, comprise: contact support (10), be articulated in the multiple fingertips (11) on described contact support (10), and isolation grid (12), described fingertip (11) is divided into some groups by described isolation grid (12), often organize described fingertip (11) to be connected with described contact support (10) by least one group of touch spring (13), it is characterized in that, fingertip described at least one (11) is for the contact on it is higher than the arc fingertip (11a) of the contact on fingertip described in other (11).
2. the structure of contact terminal of air-break according to claim 1, it is characterized in that, described contact support (10) forms guide frame (14), described arc fingertip (11a) forms the location structure coordinated with described guide frame (14), under the effect of described touch spring (13), location structure coordinates with described guide frame (14), to make the contact of described arc fingertip (11a) higher than the contact on fingertip described in other (11).
3. the structure of contact terminal of air-break according to claim 2, it is characterized in that, the direction recess that described guide frame (14) is skewed slot shape, described direction recess is that original position extends to form to the end position direction away from described rotating shaft with the one end near described arc fingertip (11a) rotating shaft, and the groove depth of described direction recess is deepened gradually by described original position to described end position.
4. the structure of contact terminal of air-break according to claim 2, it is characterized in that, described guide frame (14) comprises direction recess and is positioned at the protuberance (141) in direction recess centre position, and described direction recess is divided into two recess (142) by described protuberance (141).
5. the structure of contact terminal of air-break according to claim 4, is characterized in that, described protuberance (141) is arc, and the female portion (142) are for having the groove at the bottom of straight-line groove.
6. the structure of contact terminal of a kind of air-break according to claim 4 or 5, is characterized in that, described location structure is be applicable to groove and the projection that coupling embeds described protuberance (141) and the female portion (142).
7. the structure of contact terminal of the air-break according to any one of claim 1-5, it is characterized in that, described fingertip (11) and/or the corresponding described touch spring (13) of described arc fingertip (11a) form the positioning convex (111) being applicable to snapping in described touch spring (13), and the applicable described touch spring (13) being positioned at described positioning convex both sides snaps in the detent (112) of location.
8. the structure of contact terminal of the air-break according to any one of claim 1-5, it is characterized in that, described contact support (10) forms the touch spring groove (15) for holding described touch spring (13) one end, each is organized described touch spring (13) and is separately positioned in a described touch spring groove (15).
9. the structure of contact terminal of air-break according to claim 8, is characterized in that, each is organized described touch spring (13) and comprises cycle spring and at least one in coil spring coaxial mounted with described cycle spring.
10. the contact system of an air-break, it is characterized in that, comprise the structure of contact terminal of the air-break according to any one of claim 1-9, also comprise the clamping plate (20) for described fingertip (11) and described arc fingertip (11a) being clamped on described contact support (10), described fingertip (11) is connected with busbar (40) by be flexible coupling (30) with the end of described arc fingertip (11a).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049853.4U CN204303730U (en) | 2015-01-23 | 2015-01-23 | The structure of contact terminal of air-break and contact system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520049853.4U CN204303730U (en) | 2015-01-23 | 2015-01-23 | The structure of contact terminal of air-break and contact system |
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| CN204303730U true CN204303730U (en) | 2015-04-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762038A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN110571110A (en) * | 2019-08-30 | 2019-12-13 | 德力西电气有限公司 | Moving contact of circuit breaker |
| CN111681920A (en) * | 2020-05-21 | 2020-09-18 | 上海电器科学研究所（集团）有限公司 | Circuit breaker contact system with contact finger spring force monitoring function |
| CN110571110B (en) * | 2019-08-30 | 2024-06-04 | 德力西电气有限公司 | Moving contact of circuit breaker |
-
2015
- 2015-01-23 CN CN201520049853.4U patent/CN204303730U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762038A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| WO2017186061A1 (en) * | 2016-04-29 | 2017-11-02 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN110571110A (en) * | 2019-08-30 | 2019-12-13 | 德力西电气有限公司 | Moving contact of circuit breaker |
| CN110571110B (en) * | 2019-08-30 | 2024-06-04 | 德力西电气有限公司 | Moving contact of circuit breaker |
| CN111681920A (en) * | 2020-05-21 | 2020-09-18 | 上海电器科学研究所（集团）有限公司 | Circuit breaker contact system with contact finger spring force monitoring function |
| CN111681920B (en) * | 2020-05-21 | 2023-04-25 | 上海电器科学研究所（集团）有限公司 | Circuit breaker contact system with touch finger spring force monitoring function |
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