CN214428584U - Static contact of circuit breaker - Google Patents
Static contact of circuit breaker Download PDFInfo
- Publication number
- CN214428584U CN214428584U CN202120493617.7U CN202120493617U CN214428584U CN 214428584 U CN214428584 U CN 214428584U CN 202120493617 U CN202120493617 U CN 202120493617U CN 214428584 U CN214428584 U CN 214428584U
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- China
- Prior art keywords
- plate
- contact
- arc extinguishing
- bottom plate
- baffles
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a static contact of a circuit breaker, which comprises an electric connecting plate, a connecting plate and a bottom plate, the connecting plate is bent downwards from one end of the electric connecting plate and extends to be connected with one end of the bottom plate, the other end of the bottom plate is bent upwards to form a contact plate, the contact plate is provided with a static contact, the bottom plate is provided with a bracket for supporting the contact plate, the bracket comprises a supporting bottom plate and a supporting plate, the edges of the two sides of the contact plate are attached to the inner side of the upper half part of the supporting plate, a lifting straight rod is arranged on the bracket, the straight rod is connected with the bracket through a pressure spring, a pair of arc-extinguishing baffles distributed on two sides of the stationary contact are arranged on the contact plate, the arc-extinguishing baffles are connected with the supporting plate through springs, the two sides of the straight rod are hinged with connecting rods capable of driving the arc extinguishing baffle to move, and the other ends of the connecting rods are hinged to one side of the arc extinguishing baffle. The utility model discloses keep circuit breaker steady operation when having the closure, accelerate its disconnected speed of breaking during the disconnection, reach the effect of quick arc extinguishing.
Description
Technical Field
The utility model relates to a static contact, more specifically says that it relates to a static contact of circuit breaker.
Background
Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their range of use. The low-voltage circuit breaker is also called an automatic switch, and is an electric appliance which not only has the function of a manual switch, but also can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used to distribute electric energy, start asynchronous motor infrequently, protect power supply circuit and motor, and automatically cut off circuit when they have serious overload or short circuit and undervoltage faults.
The movable contact and the static contact in the circuit breaker are mostly composed of silver-plated copper block conducting rods and silver contacts, static contact parts are all fixed, and the fixed static contacts are repelled by the movable contacts when the circuit breaker is disconnected. The drawbacks of this structure are: the speed of separating the movable contact from the fixed contact is low, and electric arcs cannot be extinguished quickly, so that the breaking capacity of the switch is low, and the breaker has the danger of burning loss. Some movable static contacts are movable by means of braided wire connection, i.e. flexible connection. When the breaker is disconnected, due to the fact that the disconnection current is large, the generated heat is large, welding spots at the welding positions of the braided wire and the static contact are prone to melting and falling off, and the breaker is scrapped.
SUMMERY OF THE UTILITY MODEL
The utility model provides a circuit breaker's static contact, when the switch divides absolutely, can improve the part velocity of movable contact and static contact effectively, quick separate the sound contact with the arc extinguishing baffle, realize the purpose of quick arc extinguishing, improve the breaking capacity of switch.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a static contact of circuit breaker, includes and connects electroplax, connecting plate and bottom plate, its characterized in that: the connecting plate is bent downwards from one end of the electric connecting plate and extends to be connected with one end of the bottom plate, the other end of the bottom plate is bent upwards to form a contact plate, the contact plate is provided with a static contact, the bottom plate is provided with a bracket for supporting the contact plate, the support comprises a support bottom plate and support plates which extend upwards from two sides of the support bottom plate, the support plates are of concave structures with certain elasticity, the edges of both sides of the contact plate are attached to the inner side of the upper half part of the supporting plate, a lifting straight rod is arranged on the bracket, the straight rod penetrates through the contact plate, the straight rod is connected with the bracket through a pressure spring, a pair of arc extinguishing baffles distributed on two sides of the stationary contact are arranged on the contact plate, the arc extinguishing baffles are connected with the supporting plate through springs, the two sides of the straight rod are hinged with connecting rods capable of driving the arc extinguishing baffle to move, and the other ends of the connecting rods are hinged to one side of the arc extinguishing baffle.
Through adopting above-mentioned technical scheme, the back is opened to the circuit breaker, the moving contact is with the straight-bar lapse, the straight-bar drives the arc extinguishing baffle and separately to both sides respectively, the circular telegram of movable contact stationary contact, the arc extinguishing baffle can the chucking moving contact, after the circuit breaker is closed, the straight-bar upwards promotes the moving contact, the quick butt joint of arc extinguishing baffle can accelerate the speed of arc extinguishing, place the contact plate on the support, the stationary contact is lived in the support that can be better, prevent that the circuit breaker from frequently opening and shutting, lead to the contact plate to warp the stationary contact failure, influence the life of circuit breaker.
The utility model discloses further set up to: the contact plate is provided with a sliding groove in sliding fit with the arc extinguishing baffle, and two ends of the spring are fixedly connected to the inner wall of the support and the tail of the arc extinguishing baffle.
The utility model discloses further set up to: the arc extinguishing baffle is 'L' shape laminating on the stationary contact, the butt joint terminal surface of arc extinguishing baffle is the inclined plane, be the zigzag butt joint between the arc extinguishing baffle.
The utility model discloses further set up to: the spring is a ceramic spring.
Through adopting above-mentioned technical scheme, become more buckling with the gap in the middle of two arc-extinguishing baffles, prevent that electric arc from passing vertical gap easily, damaging the static contact, the support not only is used for supporting the contact board, can also increase heat radiating area, improves the radiating efficiency of static contact, adopts ceramic spring can avoid the circuit breaker to open the back, and the spring is electrically conductive to the influence of overall structure.
To sum up, the utility model discloses following beneficial effect has:
1. the speed of breaking of movable contact and stationary contact has been accelerated, mobilizable arc extinguishing baffle separates the moving contact chucking, also can be quick with the moving contact, realizes the effect of extinguishing arc fast, and the slide rail on the contact board can let arc extinguishing baffle remove according to fixed direction, and the spring assembly who adds can let arc extinguishing baffle automatic re-setting.
2. The hourglass type support is installed, so that the contact plate is more stable, after the circuit breaker is prevented from being frequently used, the contact plate is deformed, the arc extinguishing baffles in staggered butt joint can effectively prevent electric arcs from contacting with the static contact, the heat dissipation area is increased, and the problem that the heat dissipation efficiency of the static contact is too low to damage the circuit breaker is avoided.
Drawings
FIG. 1 is a schematic side sectional view of the present embodiment.
Fig. 2 is a schematic front sectional view of the movable and stationary contacts of the present embodiment.
Fig. 3 is a schematic front sectional view of the moving and static contact point contact in the present embodiment.
Fig. 4 is a top view structural diagram of the present embodiment.
Reference numerals: 1. a power connection plate; 2. a connecting plate; 3. a base plate; 4. a contact plate; 41. a stationary contact; 42. a chute; 43. an arc extinguishing baffle; 44. a spring; 5. a support; 51. a support base plate; 52. a support plate; 6. a straight rod; 61. a pressure spring; 62. a connecting rod; 7. moving contact.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment discloses a fixed contact of a circuit breaker, as shown in fig. 1-4, which includes a power receiving plate 1, a connecting plate 2 and a bottom plate 3, wherein the connecting plate 2 is bent downward from one end of the power receiving plate 1 and connected with one end of the bottom plate 3, the other end of the bottom plate 3 is bent upward to form a contact plate 4, a fixed contact 41 is arranged on the contact plate 4, a bracket 5 for supporting the contact plate 4 is arranged on the bottom plate 3, the bracket 5 includes a supporting bottom plate 51 and supporting plates 52 formed by extending upward from two sides of the supporting bottom plate 51, the supporting plates 52 are of a concave structure with certain elasticity, two side edges of the contact plate 4 are attached to the inner side of the upper half of the supporting plates 52, a lifting straight rod 6 is arranged on the bracket 5, the straight rod 6 penetrates through the contact plate 4, the straight rod 6 is connected with the bracket 5 through a compression spring 61, a pair of arc extinguishing baffles 43 distributed on two sides of the fixed contact plate 41 is arranged on the contact plate 4, arc extinguishing baffle 43 passes through spring 44 and is connected with backup pad 52, the both sides of straight-bar 6 are articulated to have the connecting rod 62 that can drive arc extinguishing baffle 43 and remove, the connecting rod 62 other end articulates in arc extinguishing baffle 43 one side, is equipped with on the contact board 4 with arc extinguishing baffle 43 sliding fit's spout 42, the both ends fixed connection of spring 44 is in the inner wall of support 5 and the afterbody of arc extinguishing baffle 43, and arc extinguishing baffle 43 is "L" shape and laminates on stationary contact 41, the butt joint terminal surface of arc extinguishing baffle 43 is the inclined plane, be the butt joint of alternating expression between the arc extinguishing baffle 43, spring 44 is the ceramic spring.
When the circuit breaker is opened, the movable contact 7 is tightly attached to the fixed contact, the movable contact 7 drives the straight rod 6 downwards, the straight rod 6 drives the hinged connecting rod 62 to twist, the two arc extinguishing baffles 43 move towards the bracket 5 along the sliding groove 42, the pressure spring 61 and the spring 44 are compressed, the elastic force is increased, the movable contact is tightly attached to the fixed contact 41 and the straight rod 6, and the circuit breaker is electrified to normally operate; when the circuit breaker is closed, moving contact 7 moves upwards, straight-bar 6 upwards promotes moving contact 7 by the effort of pressure spring 61, and spring 44 promotes arc extinguishing baffle 43 and moves to 41 directions of stationary contact rapidly along spout 42, two arc extinguishing baffle 43 alternating expression contacts, can realize extinguishing the electric arc that the movable and stationary contacts 41 produced when separately fast, the support 5 that adds not only is used for supporting and keeps the stability of contact board 4, can also increase heat radiating area, improve the radiating efficiency.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. The utility model provides a static contact of circuit breaker, is including connecing electroplax (1), connecting plate (2) and bottom plate (3), its characterized in that: the connecting plate (2) is bent downwards from one end of the electricity receiving plate (1) and extends and is connected with one end of the bottom plate (3), the other end of the bottom plate (3) is bent upwards to form a contact plate (4), a stationary contact (41) is arranged on the contact plate (4), a support (5) used for supporting the contact plate (4) is arranged on the bottom plate (3), the support (5) comprises a supporting bottom plate (51) and supporting plates (52) which extend upwards from two sides of the supporting bottom plate (51), the supporting plates (52) are of a concave structure with certain elasticity, two side edges of the contact plate (4) are attached to the inner side of the upper half part of the supporting plates (52), a lifting straight rod (6) is arranged on the support (5), the straight rod (6) penetrates through the contact plate (4), and the straight rod (6) is connected with the support (5) through a pressure spring (61), the arc extinguishing baffles (43) distributed on two sides of the stationary contact (41) are arranged on the contact plate (4), the arc extinguishing baffles (43) are connected with the supporting plate (52) through springs (44), connecting rods (62) capable of driving the arc extinguishing baffles (43) to move are hinged to two sides of the straight rod (6), and the other ends of the connecting rods (62) are hinged to one side of the arc extinguishing baffles (43).
2. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the contact plate (4) is provided with a sliding groove (42) which is in sliding fit with the arc-extinguishing baffle (43), and two ends of the spring (44) are fixedly connected to the inner wall of the bracket (5) and the tail part of the arc-extinguishing baffle (43).
3. The stationary contact of a circuit breaker as claimed in claim 1, wherein: arc extinguishing baffles (43) be "L" shape and laminate on stationary contact (41), the butt joint terminal surface of arc extinguishing baffles (43) is the inclined plane, be the butt joint of zigzag between arc extinguishing baffles (43).
4. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the spring (44) is a ceramic spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120493617.7U CN214428584U (en) | 2021-03-08 | 2021-03-08 | Static contact of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120493617.7U CN214428584U (en) | 2021-03-08 | 2021-03-08 | Static contact of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214428584U true CN214428584U (en) | 2021-10-19 |
Family
ID=78073700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120493617.7U Active CN214428584U (en) | 2021-03-08 | 2021-03-08 | Static contact of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214428584U (en) |
-
2021
- 2021-03-08 CN CN202120493617.7U patent/CN214428584U/en active Active
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