CN218160246U - Contact system and circuit breaker - Google Patents
Contact system and circuit breaker Download PDFInfo
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- CN218160246U CN218160246U CN202221184249.9U CN202221184249U CN218160246U CN 218160246 U CN218160246 U CN 218160246U CN 202221184249 U CN202221184249 U CN 202221184249U CN 218160246 U CN218160246 U CN 218160246U
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Abstract
The contact system comprises a movable contact component, a fixed contact component and an arc extinguishing cover, wherein the movable contact component comprises a movable contact body provided with a movable contact, the movable contact and the fixed contact of the fixed contact component are separated from each other or contact to complete the switch-on action, and at least two arc striking peaks which are arranged in parallel and at intervals are arranged on the end part of the movable contact body close to the arc extinguishing cover in a protruding mode. A circuit breaker comprises a housing in which the above-mentioned contact system is fitted. The utility model discloses a moving contact body sets up two at least convex striking peaks, and the striking peak can correspond and stretch into in the arc extinguishing chamber, extinguishes electric arc through cooperating with the arc extinguishing bars piece, compares current contact system, and convex striking peak can be divided into two at least parts with electric arc and introduces the arc extinguishing chamber in, does benefit to the striking and extinguishes the arc, has improved arc extinguishing performance.
Description
Technical Field
The utility model relates to a low voltage apparatus field, concretely relates to contact system and circuit breaker.
Background
The universal circuit breaker is also called a frame circuit breaker, and is a limit switch electric appliance which can connect, bear and break the current in a normal circuit and can also connect, bear a certain time and break the current under a specified abnormal condition.
At present, when a universal circuit breaker is switched on and switched off, electric arcs can be generated by moving and static contacts, the breaking process of a circuit can be delayed when the electric arcs occur, the service life of a burn contact and even the service life of the whole electric appliance are prolonged, even fire and casualty accidents can be caused when the electric arcs are serious, in the existing structure, a moving contact component, a static contact component and an arc-extinguishing cover are usually adopted to be matched with each other for arc extinguishing, when the electric arcs pass through arc-extinguishing grids of the arc-extinguishing cover, due to the external eight structural characteristics of the arc-extinguishing grids, the electric arcs can be gathered at the middle peak top groove of the arc-extinguishing grids.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, the high and better contact system of arc extinguishing performance of reliability and applied this contact system's circuit breaker.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a contact system comprises a moving contact assembly, a fixed contact assembly and an arc-extinguishing chamber, wherein the moving contact assembly comprises a moving contact body provided with a moving contact, the moving contact and the fixed contact of the fixed contact assembly are mutually separated or contacted to complete the switch-on action, and at least two arc striking peaks which are arranged in parallel and at intervals are arranged at the end part of the moving contact body close to the arc-extinguishing chamber in a protruding mode.
Furthermore, the arc striking peak is provided with a movable arc striking contact, the fixed contact assembly is provided with a fixed arc striking contact, the movable arc striking contact is earlier in contact with the fixed arc striking contact than the movable contact is in contact with the fixed contact when the switch is switched on, and the movable arc striking contact is later separated from the fixed arc striking contact than the movable contact is separated from the fixed contact when the switch is switched off.
Furthermore, the end center of the moving contact body is convexly provided with two or three arc striking peaks which are arranged in parallel and at intervals, one side of the arc extinguishing grid opposite to the moving contact body is provided with two or three arc striking gaps which are arranged in parallel and at intervals, and each arc striking peak is correspondingly matched with one arc striking gap respectively.
Further, a canyon is formed between adjacent arc striking peaks, and the two sides of each arc striking peak are inclined and gradually reduced to form the canyon.
Furthermore, the moving contact body is formed by arranging a plurality of contact blades side by side at intervals, the side edge of each contact blade is opposite to the corresponding static contact assembly, and at least two arc striking peaks are formed by outwards protruding and extending the end parts of part of the contact blades.
Further, at least one contact blade forming an arc striking peak is provided with a movable arc striking contact; the middle part of the side edge of each contact blade is provided with a contact, all the contacts are positioned on the same straight line to form a movable contact, and the movable contact is far away from the arc extinguishing cover relative to the movable arc striking contact.
Further, the contact blade comprises a plurality of first contact blades and a plurality of third contact blades, the length of each third contact blade is smaller than that of the corresponding first contact blade, the end portions of the first contact blades protrude outwards to form arc striking peaks, the end portions of the third contact blades form valleys between the arc striking peaks, and all the first contact blades forming one arc striking peak are located between at least two third contact blades.
The contact blade further comprises a second contact blade, the length of the second contact blade is greater than that of the third contact blade and smaller than that of the first contact blade, all the first contact blades forming one arc striking peak are located between at least two second contact blades, and the third contact blades are arranged on one side, far away from the first contact blades, of the second contact blades side by side.
Furthermore, the moving contact body is of an integral structure, the center of the end part of the moving contact body extends outwards to form at least two arc striking peaks, and a moving contact and a moving arc striking contact are arranged on one side, facing the static contact component, of the moving contact body.
Furthermore, the arc extinguishing cover includes the casing and a plurality of intervals set up the arc extinguishing bars piece in the casing, is equipped with at least two striking breachs that correspond the complex with the striking peak in every arc extinguishing bars piece and the relative one side of moving contact body.
Furthermore, the static contact component comprises a static contact body, a static arc striking contact and a static contact are arranged on one side of the static contact body facing the moving contact component, the static arc striking contact is located on one side close to the arc extinguishing cover, and the static contact is located on one side far away from the arc extinguishing cover.
A circuit breaker comprising a housing within which is fitted a contact system as described above.
The utility model discloses a contact system and circuit breaker, moving contact body set up two at least convex striking peaks, and the striking peak can correspond and stretch into the arc-extinguish chamber in, extinguishes electric arc through cooperating with the arc extinguishing bars piece, compares current contact system, and convex striking peak can fall into two at least parts with electric arc and introduce the arc-extinguish chamber in, does benefit to the striking and puts out the arc, has improved arc extinguishing performance.
In addition, the movable arc striking contact and the static arc striking contact are in contact firstly and then break, so that the movable contact and the static contact are protected, and the movable contact and the static contact are prevented from being burnt.
Drawings
Fig. 1 is a schematic structural diagram of a circuit breaker according to the present invention;
fig. 2 is a schematic structural view (front side) of the moving contact assembly of the present invention;
fig. 3 is a schematic structural view (side view) of the moving contact assembly of the present invention;
FIG. 4 is a schematic view of a first contact blade according to the present invention;
FIG. 5 is a schematic view of a second contact blade according to the present invention;
fig. 6 is a schematic structural view of a middle static contact assembly according to the present invention;
figure 7 is a schematic structural view of an arc-extinguishing chamber of the present invention;
fig. 8 is a schematic structural diagram of an arc-extinguishing grid plate of the present invention;
fig. 9 is a schematic view of a circuit breaker according to the prior art;
fig. 10 is a schematic structural view of a movable contact assembly in the prior art;
figure 11 is a schematic view of a prior art arc chute.
Detailed Description
The following description will further describe a contact system and a circuit breaker according to embodiments of the present invention with reference to the accompanying drawings 1 to 8. The contact system and the circuit breaker of the present invention are not limited to the description of the following embodiments.
A contact system comprises a moving contact component 1, a static contact component 2 and an arc-extinguishing cover 3, wherein the moving contact component 1 comprises a moving contact body 11 provided with a moving contact 12, the moving contact 12 and a static contact 21 of the static contact component 2 are mutually separated or contacted to complete a switching-on action, the arc-extinguishing cover 3 is arranged on one side of the moving contact component 1 in a matched mode and used for extinguishing electric arcs generated by switching-off and switching-on operations with the moving contact component 1, at least two arc striking peaks 13 which are arranged in parallel and at intervals are arranged on the end portion of one side, close to the arc-extinguishing cover 3, of the moving contact body 11 in a protruding mode, and when the switching-on and switching-off operations are conducted, each arc striking peak 13 is matched with an arc-extinguishing grating sheet 31 of the arc-extinguishing cover 3 to introduce the electric arcs into the arc-extinguishing cover 3.
The utility model discloses a contact system and circuit breaker, moving contact body 11 sets up two at least convex striking peaks 13, and striking peaks 13 can correspond and stretch into arc-extinguish chamber 3 in, extinguishes electric arc through cooperating with arc extinguishing bars piece 31, compares current contact system, and convex striking peaks 13 can fall into two at least parts with electric arc and introduce arc-extinguish chamber 3 in, do benefit to the striking and put out the arc, have improved arc extinguishing performance.
A specific embodiment is provided with reference to fig. 1 to 8, the contact system includes a moving contact assembly 1, a fixed contact assembly 2, and an arc-extinguishing cover 3, where the moving contact assembly 1 and the fixed contact assembly 2 are disposed opposite to each other, the arc-extinguishing cover 3 is disposed on one side of the moving contact assembly 1, preferably, the arc-extinguishing cover 3 is disposed between the moving contact assembly 1 and the fixed contact assembly 2, the arc-extinguishing cover 3 includes a housing and a plurality of arc-extinguishing bars 31 disposed in the housing at intervals, the moving contact assembly 1 includes a moving contact body 11, a moving contact 12 is disposed on one side of the moving contact body 11 facing the fixed contact assembly 2, a fixed contact 21 matched with the moving contact 12 is disposed on the fixed contact assembly 2, and the moving contact 12 and the fixed contact 21 are separated from each other and contacted to complete the switching and closing operation of the contact system. At least two arc striking peaks 13 are convexly arranged at the end part of the moving contact body 11, the arc striking peaks 13 are arranged on one side close to the arc extinguishing chamber 3 in parallel at intervals, and when the switch is switched on and off, each arc striking peak 13 is matched with the arc extinguishing grid plate 31 to enable the electric arc to be divided into at least two parts to be introduced into the arc extinguishing chamber 3 to be extinguished.
Preferably, two or three spaced arc initiation peaks 13 arranged in parallel are arranged at the end of the movable contact body 11, the arc initiation peaks 13 make the end of the movable contact body 11 in a mountain peak shape with undulation, a canyon is formed between adjacent arc initiation peaks 13, two or three arc initiation notches 311 arranged in parallel and at intervals are correspondingly arranged at one side of the arc extinguishing grid piece 31 opposite to the movable contact body 11, so that each arc initiation peak 13 can be correspondingly matched with one arc initiation notch 311, certainly, a larger arc initiation notch 311 can be arranged at one side of the arc extinguishing grid piece 31 opposite to the movable contact body 11, so that all the arc initiation peaks 13 are matched with the arc initiation notches 311, but the arc initiation effect is better than that of the arc initiation peaks 13 and the arc initiation notches 311 which are in one-to-one correspondence. Of course, as other embodiments, more arc initiation peaks 13 may be provided. Further, the movable arcing contact 14 is arranged at the arcing peak 13, the static contact assembly 2 is provided with the static arcing contact 22, preferably, the movable arcing contact 14 and the static arcing contact 22 are arranged in a one-to-one correspondence manner, during switching-on, the movable arcing contact 14 is firstly contacted with the static arcing contact 22, then the movable contact 12 is contacted with the static contact 21, during switching-off, the movable contact 12 is firstly separated from the static contact 21, then the movable arcing contact 14 is separated from the static arcing contact 22, and thus, the characteristic that the movable arcing contact 14 is firstly contacted with the static arcing contact 22 and then separated is beneficial to protecting the movable contact 12 and the static contact 21 from being burnt by electric arcs.
Preferably, both sides of the arc striking peak 13 are inclined and gradually reduced to a canyon, namely, the arc striking peak 13 is approximately in an inverted V shape, the canyon is approximately in a V shape, the arc striking peak 13 and the canyon at the end part of the movable contact component 1 form a structure which is not in a square wave shape, is straight up and down, and has a curve wave structure.
The utility model provides a moving contact body 11 structure of this embodiment, moving contact body 11 is formed by a plurality of contact pieces interval setting side by side, and wherein the side of contact piece is relative with quiet contact subassembly 2, and the face that also is the contact piece is perpendicular relative with the face of arc chute piece 31, and the tip by partial contact piece outwards protrudes to extend and forms two at least striking peaks 13.
Preferably, each arc striking peak 13 is formed by the outward protrusion of the end parts of at least two contact blades, a movable arc striking contact 14 is arranged on all the contact blades forming the arc striking peak 13, the movable arc striking contact 14 is positioned on one side of the contact blade close to the end part and is opposite to the static contact assembly 2, and of course, only one movable arc striking contact 14 can be arranged on all the contact blades forming the arc striking peak 13; a contact is arranged in the middle of the side edge of each contact blade, all the contacts are positioned on the same straight line to form a movable contact 12, and the movable contact 12 is far away from the arc extinguishing chamber 3 relative to a movable arc striking contact 14 and is matched with a fixed contact 21 of the static contact component 2.
As shown in fig. 2 to 5, the movable contact assembly 1 is composed of a first contact blade 111, a second contact blade 112 and a third contact blade 113 which are different in length, the length of the third contact blade 113 is smaller than that of the first contact blade 111, the length of the second contact blade 112 is larger than that of the third contact blade 113 and smaller than that of the first contact blade 111, the end portion of the first contact blade 111 extends and protrudes outwards to form an arc striking peak 13, at least one arc striking peak 13 is formed by the end portion of one first contact blade 111, the end portion of the third contact blade 113 forms a valley between the arc striking peaks 13, and all the first contact blades 111 forming one arc striking peak 13 are positioned between at least two third contact blades 113.
Specifically, all the first contact blades 111 forming one arc striking peak 13 are located between at least two second contact blades 112, the third contact blades 113 are arranged side by side on the sides of the second contact blades 112 far away from the first contact blades 111, and the middle parts of the side edges of the first contact blades 111, the second contact blades 112 and the third contact blades 113 facing the static contact assembly 2 are respectively provided with a contact point, and all the contact points jointly form the movable contact 12. In fig. 2, an arc striking peak 13 is formed by the outward protrusion of the end portions of two first contact blades 111 arranged in parallel, one side of the two first contact blades 111 of one arc striking peak 13 is sequentially provided with one second contact blade 112 and one third contact blade 113, and the other side of the two first contact blades 111 is sequentially provided with two second contact blades 112 and two third contact blades 113. The third contact blade 113 forms a valley, and the second contact blade 112 forms a transition contact blade between the arcing peak 13 and the valley, which facilitates rapid guiding of the arc at the moving contact 12 to the arcing peak 13 and prolongs the life of the arcing peak 13. It should be noted that a plurality of transition contact blades with different heights may be disposed between the first contact blade 111 forming the arc initiation peak 13 and the third contact blade 113 forming the valley, so that both sides of the arc initiation peak 13 are inclined to gradually decrease into the valley.
In fig. 2, the movable contact body 11 includes two arc striking peaks 13, wherein each arc striking peak 13 is formed by protruding end portions of two first contact blades 111, two sides of the two first contact blades 111 are respectively provided with a second contact blade 112 with a length smaller than that of the first contact blade 111, one side of the second contact blade 112 away from the arc striking peak 13 is provided with a third contact blade 113, the heights of two sides of each arc striking peak 13 are gradually reduced by the second contact blade 112 and the third contact blade 113 which are sequentially arranged, a certain distance can be kept between two adjacent arc striking peaks 13, all the first contact blades 111 are provided with movable arc striking contacts 14, and when the number of the arc striking peaks 13 is more, the above structure can still be used; in addition, the number of the dynamic arc ignition contacts 14 and the number of the dynamic arc ignition contacts can be set according to the actual application, and the number of the static arc ignition contacts 22 and the number of the static arc ignition contacts 21 need to be set correspondingly.
Of course, the moving contact body 11 may not adopt the structure formed by the plurality of contact blades side by side, the moving contact body 11 is an integral structure, the center of the end portion of the moving contact body 11 protrudes outwards to extend to form at least two arc striking peaks 13, a certain interval is left between every two adjacent arc striking peaks 13, one side of the moving contact body 11 facing the static contact assembly 2 is provided with a moving contact 12 and a moving arc striking contact 14, wherein the moving contact 12 is located in the middle of the moving contact body 11, the moving contacts 12 may be provided in plurality, or only one moving contact 12 may be provided, and the moving arc striking contact 14 is correspondingly located on one side of each arc striking peak 13 facing the static contact assembly 2.
As shown in fig. 1 and 6, the fixed contact assembly 2 includes a fixed contact body, the fixed contact body in fig. 1 and 6 is L-shaped as a whole, a fixed striking contact 22 and a fixed contact 21 are disposed on one side of the fixed contact body facing the movable contact assembly 1, the fixed striking contact 22 is located on one side close to the arc extinguishing chamber 3, that is, the fixed striking contact 22 is located on the upper side of the fixed contact body, the fixed contact 21 is located on one side far from the arc extinguishing chamber 3, that is, the fixed contact 21 is located on the lower side of the fixed contact body, wherein the fixed contact 21 and the fixed striking contact 22 correspond to the movable contact 12 and the movable striking contact 14 one by one, respectively.
As shown in fig. 7 and 8, the arc chute 3 includes a housing and a plurality of arc-extinguishing bars 31 disposed in the housing at intervals, one end of the housing is open and is opposite to the movable contact body 11, an arc-striking notch 311 correspondingly matched with the arc-striking peak 13 is disposed on one side of each arc-extinguishing bar 31 opposite to the movable contact body 11, two arc-striking notches 311 disposed in parallel and at intervals are disposed on one side of each arc-extinguishing bar 31 in the figure, the plurality of arc-extinguishing bars 31 jointly form two arc-striking grooves, and each arc-striking peak 13 can correspondingly extend into each arc-striking groove, so as to introduce an arc into the arc chute 3, which is a preferred scheme of this embodiment.
The utility model also discloses a circuit breaker, including the shell be equipped with in the shell like this embodiment the contact system, wherein move contact subassembly 1 and static contact subassembly 2 and set up relatively, arc chute 3 sets up between move contact subassembly 1 and static contact subassembly 2, moves the striking peak 13 of contact subassembly 1 and corresponds the cooperation with the striking breach 311 of arc chute 31 in the arc chute 3.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model discloses to the ordinary skilled person in technical field's the prerequisite that does not deviate from the utility model discloses under the design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (12)
1. The utility model provides a contact system, includes moving contact subassembly (1), static contact subassembly (2) and arc-extinguishing chamber (3), moving contact subassembly (1) is including moving contact body (11) that are provided with moving contact (12), moving contact (12) and static contact (21) the mutual separation of static contact subassembly (2) or contact completion divide the combined floodgate action, its characterized in that: at least two arc striking peaks (13) which are arranged in parallel and at intervals are convexly arranged at the end part of the moving contact body (11) close to the arc extinguishing cover (3).
2. A contact system according to claim 1, wherein: the arc striking peak (13) is provided with a movable arc striking contact (14), the static contact component (2) is provided with a static arc striking contact (22), the contact between the movable arc striking contact (14) and the static arc striking contact (22) is earlier than the contact between the movable contact (12) and the static contact (21) when the switch is switched on, and the separation between the movable arc striking contact (14) and the static arc striking contact (22) is later than the separation between the movable contact (12) and the static contact (21) when the switch is switched off.
3. A contact system according to claim 2, wherein: the arc striking device is characterized in that two or three arc striking peaks (13) which are arranged in parallel and at intervals are arranged at the end part of the moving contact body (11) in a protruding mode, two or three arc striking notches (311) which are arranged in parallel and at intervals are arranged on one side, opposite to the moving contact body (11), of the arc extinguishing grid plate (31), and each arc striking peak (13) is correspondingly matched with one arc striking notch (311) respectively.
4. A contact system according to claim 2, wherein: canyons are formed between adjacent arc striking peaks (13), and the two sides of each arc striking peak (13) are inclined and gradually reduced to form the canyons.
5. A contact system according to any of claims 2 to 4, characterised in that: the moving contact body (11) is formed by arranging a plurality of contact blades side by side at intervals, the side edges of the contact blades are opposite to the static contact component (2), and at least two arc striking peaks (13) are formed by outwards protruding and extending the end parts of partial contact blades.
6. A contact system according to claim 5, wherein: at least one contact blade forming an arc striking peak (13) is provided with the movable arc striking contact (14); a contact is arranged in the middle of the side edge of each contact blade, all the contacts are positioned on the same straight line to form a moving contact (12), and the moving contact (12) is far away from the arc extinguishing chamber (3) relative to a moving arc striking contact (14).
7. A contact system according to claim 5, wherein: the contact blade comprises a plurality of first contact blades (111) and a plurality of third contact blades (113), the length of each third contact blade (113) is smaller than that of each first contact blade (111), the end portions of the first contact blades (111) protrude outwards to form arc striking peaks (13), the end portions of the third contact blades (113) form valleys between the arc striking peaks (13), and all the first contact blades (111) forming one arc striking peak (13) are located between at least two third contact blades (113).
8. A contact system according to claim 7, wherein: the contact blade also comprises second contact blades (112), the length of each second contact blade (112) is greater than that of each third contact blade (113) and smaller than that of each first contact blade (111), all the first contact blades (111) forming one arc striking peak (13) are located between at least two second contact blades (112), and the third contact blades (113) are arranged side by side on one side, far away from the first contact blades (111), of each second contact blade (112).
9. A contact system according to any of claims 2 to 4, characterised in that: the moving contact body (11) is of an integral structure, the center of the end part of the moving contact body (11) extends outwards to form at least two arc striking peaks (13), and a moving contact (12) and a moving arc striking contact (14) are arranged on one side of the moving contact body (11) facing the static contact component (2).
10. A contact system according to claim 1, wherein: the arc extinguishing cover (3) comprises a shell and a plurality of arc extinguishing grid pieces (31) arranged in the shell at intervals, and at least two arc striking notches (311) which are correspondingly matched with the arc striking peaks (13) are arranged on one side, opposite to the moving contact body (11), of each arc extinguishing grid piece (31).
11. A contact system according to claim 1, wherein: the static contact component (2) comprises a static contact body, a static arc striking contact (22) and a static contact (21) are arranged on one side of the static contact body facing the moving contact component (1), the static arc striking contact (22) is located on one side close to the arc extinguishing cover (3), and the static contact (21) is located on one side far away from the arc extinguishing cover (3).
12. A circuit breaker, comprising a housing, characterized in that: a contact system according to any one of claims 1 to 11 fitted in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184249.9U CN218160246U (en) | 2022-05-17 | 2022-05-17 | Contact system and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184249.9U CN218160246U (en) | 2022-05-17 | 2022-05-17 | Contact system and circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN218160246U true CN218160246U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221184249.9U Active CN218160246U (en) | 2022-05-17 | 2022-05-17 | Contact system and circuit breaker |
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| CN (1) | CN218160246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
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2022
- 2022-05-17 CN CN202221184249.9U patent/CN218160246U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
| CN117457453B (en) * | 2023-12-25 | 2024-04-30 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
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