CN209071214U - A kind of contact of breaker arc-control device and its breaker - Google Patents
A kind of contact of breaker arc-control device and its breaker Download PDFInfo
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- CN209071214U CN209071214U CN201920032829.8U CN201920032829U CN209071214U CN 209071214 U CN209071214 U CN 209071214U CN 201920032829 U CN201920032829 U CN 201920032829U CN 209071214 U CN209071214 U CN 209071214U
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Abstract
A kind of contact of breaker arc-control device and its breaker, contact arc extinguishing device includes dynamic guide rod, quiet guide rod, arc extinguishing grid pieces group and the arc striking piece being fixedly installed on quiet guide rod, movable contact and stationary contact are respectively fixed on dynamic guide rod and quiet guide rod, feature: the arc striking piece includes that one end extends to stationary contact direction and separates two and sets up separately in stationary contact two sides and the supporting leg that is electrically connected with quiet guide rod, between two supporting legs have allow movable contact to pass through space, the other end far from stationary contact and towards arc extinguishing grid pieces group direction extend the road Pao Hu；During movable contact and stationary contact are detached from the space from being initially separated movable contact, two supporting legs are at a distance from the part to dynamic guide rod that the road Pao Hu is connected from the variation of the distance between movable contact and stationary contact is greater than for less than the distance between movable contact and stationary contact.Realize that electric arc fast transfer to arc striking piece, avoids ablation of the electric arc on stationary contact, improves the electric life of breaker, structure is simple, and arc quenching effect is good.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, and in particular to a kind of contact of breaker arc-control device, and also
It is related to the breaker using the contact arc extinguishing device.
Background technique
Critical elements of the low-voltage circuit breaker as low voltage electric network can when especially occurring Short-Circuit High Current in circuit
Rapid disjunction circuit, to guarantee that power grid is without damage.Low-voltage circuit breaker can generate electric arc during breaking current, electricity
Arc enters arc-chutes and is divided to extinguish.If electric arc is burnt on dynamic/static contact without being introduced into arc-chutes for a long time,
It will cause breaking current failure；Even if arc energy is introduced into arc-chutes, if dynamic/static contact cannot be left with cracking speed, still
So it will cause a large amount of scaling loss on dynamic/static contact surface, to influence the whole electric life of breaker.
Therefore, in the arc resistance of contact material there has been no before revolutionary breakthrough, in order to improve breaker
Electric life, it is crucial for improving the transfer velocity of electric arc, it is common practice to one is installed near contact for striking
Structure, that is, arc striking piece, arc striking piece one end are fixed near stationary contact, and the other end then stretches to arc extinguishing grid pieces group bottom, the arc striking piece phase
When in being artificially provided with an access to electric arc, so that electric arc quickly leaves dynamic/static contact and enters arc-chutes.However, due to drawing
The effect of the difference of arcs material, structure type, transferred arc is also different, therefore how to design a reasonable arc-striking structure and be
Current research hotspot.
Summary of the invention
The top priority of the utility model is to provide a kind of contact of breaker arc-control device, can be quickly transferred to electric arc
Arc-chutes are to effectively reduce the ablation of movable contact and stationary contact, structure is simple, and arc quenching effect is good for arc extinction.
Another task of the utility model is to provide the breaker using this contact arc extinguishing device, can be improved breaker
Electric life and ensure contact arc extinguishing device described in technical effect comprehensive embodiment.
To complete top priority, technical solution provided by the utility model is: a kind of contact of breaker arc-control device, packet
Include a dynamic guide rod, a quiet guide rod, an arc extinguishing grid pieces group and one and be fixedly installed in arc striking piece on quiet guide rod, the dynamic guide rod and
The movable contact and stationary contact of face are respectively fixed on quiet guide rod, the dynamic guide rod is realized dynamic around the rotation of itself rotation centerline
Contact/separation of contact and stationary contact, the arc striking piece include that one end extends to stationary contact direction and separates two and sets up separately
Stationary contact two sides and the supporting leg being electrically connected with quiet guide rod have the sky for allowing movable contact to pass through between two supporting legs
Between, the other end far from stationary contact and towards arc extinguishing grid pieces group direction extend the road Pao Hu；In movable contact and stationary contact from being initially separated
During being detached from the space to movable contact, the distance of two supporting legs to dynamic guide rod is from greater than movable contact and stationary contact
The variation of the distance between point is less than the distance between movable contact and stationary contact.
Being located among two supporting legs in a specific embodiment of the utility model, on the road Pao Hu has
The road Pao Hu cut sides, during movable contact and stationary contact are detached from the space from being initially separated movable contact, described is dynamic
The minimum range of guide rod and the road Pao Hu cut sides from be greater than the variation of the distance between movable contact and stationary contact for less than movable contact and
The distance between stationary contact.
In another specific embodiment of the utility model, the fixed installation position of the arc striking piece and quiet guide rod
Further from arc extinguishing grid pieces group on the direction perpendicular to dynamic guide rod rotation centerline and relative to stationary contact.
In another specific embodiment of the utility model, the arc striking piece is consolidated by way of rivet or weld
Dingan County is loaded on quiet guide rod.
In the utility model there are one in specific embodiment, the quiet guide rod is in being parallel to dynamic guide rod rotation
On the direction of heart line and be located at stationary contact two sides respectively open up it is fluted, supporting leg have perpendicular to quiet guide rod support portion, institute
The support portion stated is inserted into the groove of quiet guide rod, and the fixed installation of arc striking piece and quiet guide rod is realized by riveting.
In a specific embodiment in turn of the utility model, the supporting leg has the weldering perpendicular to quiet guide rod
The end of socket part, the weld part and quiet guide rod cooperates, and the fixed installation of arc striking piece and quiet guide rod is realized by being welded to connect.
In the utility model more and in a specific embodiment, the material of the arc striking piece is high permeability material.
In the utility model again and then in a specific embodiment, the material of the arc striking piece is iron.
To complete another task, technical solution provided by the utility model is: a kind of breaker, which includes more
A contact arc extinguishing device recited above.
The utility model has the advantages that due to the above structure, firstly, the contact arc extinguishing device exists
During movable contact and stationary contact are detached from the space from being initially separated movable contact, what two supporting legs were connected with the road Pao Hu
The distance of part to dynamic guide rod changes from the distance between movable contact and stationary contact is greater than as less than between movable contact and stationary contact
Distance, and the minimum range of dynamic guide rod and the road Pao Hu cut sides is small from being greater than the distance between movable contact and stationary contact to change
Under the distance between movable contact and stationary contact, identical voltage conditions, spacing is smaller, and electric field strength is higher, and electric arc can be intended to
It is mobile toward the higher direction of electric field, therefore electric arc quickly can leave stationary contact and be transferred to arc striking piece, avoid electric arc in stationary contact
On ablation, improve the electric life of breaker；Secondly, overall structure is simple, arc quenching effect is good, and improve breaker actuation can
By property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the contact arc extinguishing device of breaker described in the utility model.
Fig. 2 is the structural schematic diagram that arc striking piece and quiet guide rod realize connection by riveting in an embodiment of the present invention.
Fig. 3 is the structural representation that arc striking piece and quiet guide rod realize connection by welding in another embodiment of the utility model
Figure.
Status diagram when Fig. 4 is dynamic and static contact separation in the contact arc extinguishing device of breaker described in the utility model.
Status diagram when Fig. 5 is dynamic and static contact separation in the contact arc extinguishing device of breaker described in the utility model.
In figure: 1. dynamic guide rods, 11. movable contacts；2. quiet guide rod, 21. stationary contacts, 22. grooves；3. arc extinguishing grid pieces group；4. drawing
Arcs, 41. supporting legs, 411. support portions, 412. weld parts, 42. roads Pao Hu, 421. road Pao Hu cut sides, 43. spaces.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, but description of the applicant to embodiment
It is not the limitation to technical solution, any change in the form rather than substance according to the utility model design all should be considered as this reality
With novel protection scope.
The concept of all directionality for being related to upper, lower, left, right, front and rear or directionality is all in the following description
On the basis of position shown in FIG. 1, thus the special limit to technical solution provided by the utility model cannot be understood as
It is fixed.
FIG. 1 to FIG. 3 is please referred to, the utility model relates to a kind of contact of breaker arc-control devices, including dynamic guide rod 1, quiet lead
Bar 2, arc extinguishing grid pieces group 3 and arc striking piece 4 are respectively fixed with the movable contact 11 of face and quiet on the dynamic guide rod 1 and quiet guide rod 2
High permeability material can be used in contact 21, the arc striking piece 4, and preferred high permeability material is iron in the present embodiment.Described is dynamic
Guide rod 1 is rotated around itself rotation centerline realizes that movable contact 11 realized circuit with contact/separation of stationary contact 21 connects on/off
It opens.The stationary contact 21 is located at the lower section of arc extinguishing grid pieces group 3.The arc striking piece 4 at least consists of two parts, be respectively to
21 direction of stationary contact, which extends and separates two, sets up separately in 21 two sides of stationary contact and the supporting leg 41, separate that is electrically connected with quiet guide rod 2
Stationary contact 21 and the road Pao Hu 42 extended towards 3 direction of arc extinguishing grid pieces group.Specifically, two supporting legs 41 be located at it is quiet
Guide rod 2 is on the direction for being parallel to dynamic 1 rotation centerline of guide rod and sets up separately in the two sides of stationary contact 21, i.e., the two described supports
Leg 41 is bent from two sides in the road Pao Hu 42 to 21 two sides of stationary contact respectively to be extended and is formed, and is had between two supporting legs 41
There is the space 43 for allowing movable contact 11 to pass through.Two supporting legs 41 are realized and quiet guide rod 2 by way of rivet or weld
Fixed installation.Movable contact 11 and stationary contact 21 from be initially separated be detached from space 43 to movable contact 11 during, institute
The distance of two supporting legs 41 stated to dynamic guide rod 1 changes from the distance between movable contact 11 and stationary contact 21 is greater than as less than dynamic
The distance between contact 11 and stationary contact 21.It is detached from movable contact 11 and stationary contact 21 from being initially separated movable contact 11 described
The process in space 43, which includes movable contact 11 with stationary contact 21, to be touched dynamic guide rod 1 and opens late contact 11 and separate with stationary contact 21
Future is led in the supporting leg 41 of future to dynamic as dynamic guide rod 1 continues to be opened to the rear journey that movable contact 11 is detached from the space 43
The distance of bar 1 is greater than the distance between movable contact 11 and stationary contact 21, and supports as dynamic guide rod 1 continues rear Cheng Ze when opening
The distance change of the part that leg 41 is connected with the road Pao Hu 42 to dynamic guide rod 1 be less than between movable contact 11 and stationary contact 21 away from
From.In rear journey, the supporting leg 41 is relative to stationary contact 21 closer to dynamic guide rod 1.The arc striking piece 4 and quiet guide rod
2 riveting/welding position on breaker length direction relative to stationary contact 21 further from arc extinguishing grid pieces group 3, i.e., described draws
Riveting/welding position of arcs 4 and quiet guide rod 2 is located at the left side of stationary contact 21, and arc extinguishing grid pieces group 3 is located at the right side of stationary contact 21
Side, and it is located at the top of quiet guide rod 2.Since the stationary contact 21 is located at the lower section of arc extinguishing grid pieces group 3, the supporting leg 41
Prolong in the upper right side that the part being connected with the road Pao Hu 42 is higher than stationary contact 21 road Qie Paohu 42 towards arc extinguishing grid pieces group 3 in the height direction
It stretches, therefore the road Pao Hu 42 is consistently higher than stationary contact 21.The dynamic guide rod 1 can be from two supporting legs 41 during rotation
Between probe into and contact movable contact 11 with stationary contact 21.Being located among two supporting legs 41 on the road Pao Hu 42 has the road Pao Hu
Cut sides 421, movable contact 11 and stationary contact 21 from be initially separated be detached from space 43 to movable contact 11 during (also
It is the mistake before movable contact 11 is flushed from being initially separated to the lower edge of movable contact 11 with the road Pao Hu cut sides 421 with stationary contact 21
In journey), the minimum range of the dynamic guide rod 1 and the road Pao Hu cut sides 421 is from greater than between movable contact 11 and stationary contact 21
Distance change is less than the distance between movable contact 11 and stationary contact 21.That is the dynamic guide rod 1 and the road Pao Hu cut sides 421
Minimum range is greater than the distance between movable contact 11 and stationary contact 21, and as dynamic guide rod 1 continues rear Cheng Suoshu's when opening
Dynamic guide rod 1 and the minimum range variation of the road Pao Hu cut sides 421 are less than the distance between movable contact 11 and stationary contact 21.Rear
The road Pao Hu cut sides 421 described in when journey are relative to stationary contact 21 closer to dynamic guide rod 1.The structure passes through electric arc from stationary contact
21 are transferred quickly to arc striking piece 4, to avoid ablation of the electric arc on stationary contact 21, improve the electric life of breaker.
Embodiment 1
It is fixed as shown in Fig. 2, being realized by way of riveting between arc striking piece 4 and quiet guide rod 2 described in the present embodiment
Installation.Specifically, the quiet guide rod 2 opens up on the direction for being parallel to dynamic guide rod rotation centerline and in 21 two sides of stationary contact
Fluted 22, supporting leg 41 has the support portion 411 perpendicular to quiet guide rod 2, and the support portion 411 is inserted into the recessed of quiet guide rod 2
In slot 22, the fixed installation of arc striking piece 4 and quiet guide rod 2 is realized by riveting.
Embodiment 2
It is fixed as shown in figure 3, being realized by way of welding between arc striking piece 4 and quiet guide rod 2 described in the present embodiment
Installation.Specifically, the supporting leg 41 has the weld part 412 perpendicular to quiet guide rod 2, the weld part 412 is led with quiet
The end of bar 2 cooperates, and the fixed installation of arc striking piece 4 and quiet guide rod 2 is realized by being welded to connect.
Fig. 4-Fig. 5 is please referred to, the specific arc quenching principle of contact arc extinguishing device of breaker described in the utility model is described:
When Short-Circuit High Current passes through in circuit, movable contact 11 and stationary contact 21 due to electrodynamic repulsion force effect and phase mutual exclusion
It opens, forms electric arc between movable contact 11 and stationary contact 21, at this time since the supporting leg 41 of 21 two sides of stationary contact and arc striking piece 4 is realized
Electrical connection, state when Fig. 4 is moving contact 1 in the contact arc extinguishing device of the breaker, the separation of static contact 2 are (namely above-mentioned
Dynamic guide rod 1 continues to be opened to the rear journey that movable contact 11 is detached from the space 43).Since the road Pao Hu 42 of arc striking piece 4 is consistently higher than
Stationary contact 21, and the spacing between dynamic guide rod 1 and the road Pao Hu notch 421 is again smaller than the spacing between movable contact 11 and stationary contact 21
(D3 > D1 in Fig. 4, wherein spacing of the D1 between movable contact 11 and stationary contact 21；D3 is arc road cut sides 421 and dynamic guide rod 1
Between minimum range).Simultaneously as shown in figure 5, supporting leg 41 to the road Pao Hu 42 be connected part be higher than in the height direction it is quiet
Contact 21, and the spacing moved between the part that guide rod 1 is connected to supporting leg 41 with the road Pao Hu 42 is less than movable contact 11 and stationary contact
Spacing (D2 > D1 in Fig. 5, wherein spacing of the D1 between movable contact 11 and stationary contact 21 between point 21；D2 is supporting leg 41
With the spacing between dynamic guide rod 1).Under identical voltage conditions, spacing is smaller, and electric field strength is higher, is equivalent at this time in stationary contact
(three electric field commanding elevations are respectively on two supporting legs 41 to three " electric field commanding elevations " provided with composition reverse c-shape around point 21
The road Dian Hepaohu cut sides 421 on point), since electric arc can be intended to, electric arc meeting mobile toward the higher direction of electric field
It leaves stationary contact 21 and is transferred to arc striking piece 4, be then introduced into arc-chutes and cut by arc extinguishing grid pieces group 3, thus extinguish electric arc, it is real
Show the disjunction of breaker, while having avoided the ablation of stationary contact 21, is conducive to electric life raising.
Claims (9)
1. a kind of contact of breaker arc-control device, including a dynamic guide rod (1), a quiet guide rod (2), an arc extinguishing grid pieces group (3) and one
The arc striking piece (4) being fixedly installed on quiet guide rod (2) is respectively fixed with face on the dynamic guide rod (1) and quiet guide rod (2)
Movable contact (11) and stationary contact (21), the dynamic guide rod (1) are realized movable contact (11) and quiet around the rotation of itself rotation centerline
Contact/separation of contact (21), it is characterised in that: the arc striking piece (4) includes that one end extends simultaneously to stationary contact (21) direction
Two are separated to set up separately in stationary contact (21) two sides and the supporting leg (41) that is electrically connected with quiet guide rod (2), two supporting legs
(41) there is the space (43) for allowing movable contact (11) to pass through, the other end is far from stationary contact (21) and towards arc extinguishing grid pieces group (3) between
The road Pao Hu (42) that direction extends；The sky is detached from from being initially separated movable contact (11) in movable contact (11) and stationary contact (21)
Between during (43), the distances of two supporting legs (41) to dynamic guide rod (1) is from being greater than movable contact (11) and stationary contact
The distance between (21) variation is less than the distance between movable contact (11) and stationary contact (21).
2. a kind of contact of breaker arc-control device according to claim 1, it is characterised in that on the road Pao Hu (42)
There are the road Pao Hu cut sides (421) among two supporting legs (41), in movable contact (11) and stationary contact (21) from starting point
During being detached from the space (43) to movable contact (11), the dynamic guide rod (1) and the road Pao Hu cut sides (421) are most
Small distance is from the distance between movable contact (11) and stationary contact (21) variation is greater than for less than movable contact (11) and stationary contact (21)
The distance between.
3. a kind of contact of breaker arc-control device according to claim 1, it is characterised in that the arc striking piece (4) with it is quiet
The fixed installation position of guide rod (2) on the direction perpendicular to dynamic guide rod rotation centerline and relative to stationary contact (21) further from
Arc extinguishing grid pieces group (3).
4. a kind of contact of breaker arc-control device according to claim 1 or 3, it is characterised in that the arc striking piece (4)
It is fixedly installed in by way of rivet or weld on quiet guide rod (2).
5. a kind of contact of breaker arc-control device according to claim 4, it is characterised in that the quiet guide rod (2) is flat
Row respectively opens up fluted (22) on the direction of dynamic guide rod rotation centerline and positioned at the two sides of stationary contact (21), supporting leg (41)
With the support portion (411) perpendicular to quiet guide rod (2), the support portion (411) is inserted into the groove (22) of quiet guide rod (2),
The fixed installation of arc striking piece (4) and quiet guide rod (2) is realized by riveting.
6. a kind of contact of breaker arc-control device according to claim 4, it is characterised in that supporting leg (41) tool
There is the weld part (412) perpendicular to quiet guide rod (2), the end cooperation of the weld part (412) and quiet guide rod (2) passes through weldering
The fixed installation for realizing arc striking piece (4) and quiet guide rod (2) is connect in succession.
7. a kind of contact of breaker arc-control device according to claim 1, it is characterised in that the material of the arc striking piece (4)
Material is high permeability material.
8. a kind of contact of breaker arc-control device according to claim 7, it is characterised in that the material of the arc striking piece (4)
Material is iron.
9. a kind of breaker, it is characterised in that: filled including contact arc-extinguishing described in any one of multiple the claims 1~8
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920032829.8U CN209071214U (en) | 2019-01-09 | 2019-01-09 | A kind of contact of breaker arc-control device and its breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920032829.8U CN209071214U (en) | 2019-01-09 | 2019-01-09 | A kind of contact of breaker arc-control device and its breaker |
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| Publication Number | Publication Date |
|---|---|
| CN209071214U true CN209071214U (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920032829.8U Active CN209071214U (en) | 2019-01-09 | 2019-01-09 | A kind of contact of breaker arc-control device and its breaker |
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| CN (1) | CN209071214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473307A (en) * | 2019-01-09 | 2019-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact of breaker arc-control device and its breaker |
| CN115863105A (en) * | 2023-01-18 | 2023-03-28 | 国网山西省电力公司吕梁供电公司 | Distribution network grounding arc-extinguishing device |
-
2019
- 2019-01-09 CN CN201920032829.8U patent/CN209071214U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473307A (en) * | 2019-01-09 | 2019-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact of breaker arc-control device and its breaker |
| CN115863105A (en) * | 2023-01-18 | 2023-03-28 | 国网山西省电力公司吕梁供电公司 | Distribution network grounding arc-extinguishing device |
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