CN115547776A - Double-contact breaker - Google Patents
Double-contact breaker Download PDFInfo
- Publication number
- CN115547776A CN115547776A CN202211398117.0A CN202211398117A CN115547776A CN 115547776 A CN115547776 A CN 115547776A CN 202211398117 A CN202211398117 A CN 202211398117A CN 115547776 A CN115547776 A CN 115547776A
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- lever
- rotating shaft
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Abstract
A double-contact circuit breaker comprises a circuit breaker shell, wherein an operating mechanism, an arc extinguishing mechanism and a contact device are arranged in the circuit breaker shell, the contact device comprises two double-contact moving contacts which are connected in parallel in a circuit, and two static contacts arranged in the circuit breaker shell, and the two static contacts and the double-contact moving contacts can be matched to realize breaking; the operating mechanism comprises a handle, a lever, an energy storage spring and a rotating shaft, wherein through holes are formed in the moving contacts and the lever, the rotating shaft penetrates through the through holes to connect the rotating shaft, the lever and a moving contact support provided with two moving contacts together, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against the moving contact support, and the other end of the energy storage spring abuts against the lever; the surface of the rotating shaft is provided with a heat insulation layer, and the heat insulation layer is positioned between the rotating shaft and the lever.
Description
Technical Field
The present invention relates to a double-contact circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker is a terminal electric appliance widely applied in the industrial and civil fields, and the mechanism of the circuit breaker generally comprises an operating mechanism, a tripping mechanism, an arc extinguishing mechanism, an insulating shell, an operating handle, a moving contact and a static contact and the like. The movable and static contacts of the existing miniature circuit breaker are mostly in a single-breakpoint form, namely, only one movable contact and one static contact are arranged on the main circuit of the same pole, and the miniature circuit breaker has the following defects: with the continuous improvement of the requirements of the electrical equipment on the breaking current of the circuit breaker, the traditional single-breakpoint circuit breaker has very limited improvement on the breaking capacity and is difficult to meet the requirements of the electrical equipment, so that the burning and the abrasion of a contact of the circuit breaker are very serious, the service life of the circuit breaker is short,
the contact of the existing miniature circuit breaker also adopts a double-contact structure, namely two pairs of moving and static contacts are arranged to jointly bear breaking current, so that the breaking capacity is greatly improved. However, due to the fact that the breaking current borne by the double-contact structure is increased, the breaker is heated due to the fact that the breaker is overloaded, loose in virtual connection of a wiring terminal of the breaker and used after being electrified for a long time, heat is increased, the service life of the breaker is shortened, and the problem that the breaker with good heat dissipation or heat insulation performance needs to be solved urgently is solved.
Disclosure of Invention
The invention aims to provide a double-contact circuit breaker, which can solve the problems of large heat productivity and short service life of the conventional double-contact circuit breaker.
The above object of the present invention is achieved by the following scheme:
a double-contact circuit breaker comprises a circuit breaker shell, wherein an operating mechanism, an arc extinguishing mechanism and a contact device are arranged in the circuit breaker shell, the contact device comprises two double-contact moving contacts which are connected in parallel in a circuit, and two static contacts arranged in the circuit breaker shell, and the two static contacts and the double-contact moving contacts can be matched to realize breaking; the operating mechanism comprises a handle, a lever, an energy storage spring and a rotating shaft, wherein through holes are formed in the moving contacts and the lever, the rotating shaft penetrates through the through holes to connect the rotating shaft, the lever and a moving contact support provided with two moving contacts together, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against the moving contact support, and the other end of the energy storage spring abuts against the lever;
the movable contact is characterized in that a spacer is arranged between the two movable contacts, a heat dissipation convex edge is arranged on the surface of the spacer, a heat insulation layer is arranged on the surface of the rotating shaft, and the heat insulation layer is positioned between the rotating shaft and the lever.
Further, the arc extinguishing mechanism comprises an arc extinguishing cover, an arc isolating wall and an arc striking plate.
Furthermore, the moving contact is arranged on the moving contact support through welding or riveting.
Furthermore, the energy storage spring is a double-end torsion spring, the middle end of the double-end torsion spring is abutted against the two moving contacts, and the two ends of the double-end torsion spring are abutted against the rotating shaft of the lever.
The technical effects can be achieved by the scheme of the invention;
the circuit breaker adopts a double-moving-contact scheme, and the two moving contacts are arranged on the bracket, so that the contact area of the moving contact and the moving contact is increased, the heat dissipation performance of the temperature is reduced, and the service life of the contacts is prolonged.
According to the circuit breaker, the spacing piece with the heat dissipation function is arranged between the two moving contacts, and the spacing piece is provided with the heat dissipation convex edge, so that the heat dissipation area is increased, and the service life of the circuit breaker is shortened.
Drawings
Fig. 1 is a schematic structural diagram of a double-contact circuit breaker according to the present invention.
Fig. 2 is a side view of the dual-contact circuit breaker of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1 and 2, a dual-contact circuit breaker includes a circuit breaker housing, in which an operating mechanism, an arc extinguishing mechanism, and a contact device are disposed, the contact device includes two dual-contact moving contacts connected in parallel in a circuit, and two stationary contacts disposed in the circuit breaker housing, and the two stationary contacts and the dual-contact moving contacts can cooperate to realize breaking; the operating mechanism comprises a handle, a lever, an energy storage spring and a rotating shaft, wherein through holes are formed in the moving contacts and the lever, the rotating shaft penetrates through the through holes to connect the rotating shaft, the lever and a moving contact support provided with two moving contacts together, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against the moving contact support, and the other end of the energy storage spring abuts against the lever; the moving contact is arranged on the moving contact support through welding or riveting;
the movable contact is characterized in that a spacer is arranged between the two movable contacts, a heat dissipation convex edge is arranged on the surface of the spacer, a heat insulation layer is arranged on the surface of the rotating shaft, and the heat insulation layer is located between the rotating shaft and the lever.
The arc extinguishing mechanism comprises an arc extinguishing cover, an arc isolating wall and an arc striking plate.
The energy storage spring is a double-end torsion spring, the middle end of the double-end torsion spring is abutted against the two moving contacts, and the two ends of the double-end torsion spring are abutted against the rotating shaft of the lever.
According to the scheme, the spacer with the heat dissipation convex edge is arranged between the moving contacts, so that the heat dissipation performance and the heat insulation performance are improved, and the service life of the circuit breaker is prolonged.
Example 2
Referring to fig. 1 and 2, a dual-contact circuit breaker includes a circuit breaker housing, in which an operating mechanism, an arc extinguishing mechanism, and a contact device are disposed, the contact device includes two dual-contact moving contacts connected in parallel in a circuit, and two stationary contacts disposed in the circuit breaker housing, and the two stationary contacts and the dual-contact moving contacts can cooperate to realize breaking; the operating mechanism comprises a handle, a lever, an energy storage spring and a rotating shaft, wherein through holes are formed in the moving contacts and the lever, the rotating shaft penetrates through the through holes to connect the rotating shaft, the lever and a moving contact support provided with two moving contacts together, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against the moving contact support, and the other end of the energy storage spring abuts against the lever; the moving contact is arranged on the moving contact support through welding or riveting; the arc extinguishing mechanism comprises an arc extinguishing cover, an arc isolating wall and an arc striking plate.
The surface of the rotating shaft is provided with a heat insulation layer, and the heat insulation layer is positioned between the rotating shaft and the lever.
The energy storage spring is a double-end torsion spring, the middle end of the double-end torsion spring is abutted against the two moving contacts, and the two ends of the double-end torsion spring are abutted against the rotating shaft of the lever.
And a spacer is arranged between the two moving contacts, and a heat dissipation convex rib is arranged on the surface of the spacer.
According to the scheme, the spacing pieces with the heat dissipation convex edges are arranged between the moving contacts, so that the heat dissipation performance and the heat insulation performance are improved, and the service life of the circuit breaker is prolonged.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent replacement or change of the technical solution and the inventive concept thereof within the technical scope of the present invention.
Claims (4)
1. A double-contact circuit breaker comprises a circuit breaker shell, wherein an operating mechanism, an arc extinguishing mechanism and a contact device are arranged in the circuit breaker shell, the contact device comprises two double-contact moving contacts which are connected in parallel in a circuit, and two static contacts arranged in the circuit breaker shell, and the two static contacts and the double-contact moving contacts can be matched to realize breaking; the operating mechanism comprises a handle, a lever, an energy storage spring and a rotating shaft, wherein through holes are formed in the moving contacts and the lever, the rotating shaft penetrates through the through holes to connect the rotating shaft, the lever and a moving contact support provided with two moving contacts together, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against the moving contact support, and the other end of the energy storage spring abuts against the lever;
the lever-type switch is characterized in that a spacer is arranged between the two moving contacts, a heat dissipation convex edge is arranged on the surface of the spacer, a heat insulation layer is arranged on the surface of the rotating shaft, and the heat insulation layer is positioned between the rotating shaft and the lever.
2. The dual contact circuit breaker of claim 1, wherein the arc quenching mechanism includes an arc chute, an arc barrier, and an arc runner.
3. The dual-contact circuit breaker of claim 1, wherein the movable contact is mounted to the movable contact support by welding or riveting.
4. The dual-contact circuit breaker as claimed in claim 1, wherein the energy storage spring is a double-headed torsion spring, a middle end of the double-headed torsion spring abuts against the two movable contacts, and two ends of the double-headed torsion spring abut against the rotation shaft of the lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211398117.0A CN115547776A (en) | 2022-11-09 | 2022-11-09 | Double-contact breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211398117.0A CN115547776A (en) | 2022-11-09 | 2022-11-09 | Double-contact breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115547776A true CN115547776A (en) | 2022-12-30 |
Family
ID=84721572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211398117.0A Pending CN115547776A (en) | 2022-11-09 | 2022-11-09 | Double-contact breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115547776A (en) |
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2022
- 2022-11-09 CN CN202211398117.0A patent/CN115547776A/en active Pending
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