CN211929327U - Moving contact structure with curtain - Google Patents
Moving contact structure with curtain Download PDFInfo
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- CN211929327U CN211929327U CN202020610082.2U CN202020610082U CN211929327U CN 211929327 U CN211929327 U CN 211929327U CN 202020610082 U CN202020610082 U CN 202020610082U CN 211929327 U CN211929327 U CN 211929327U
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- curtain
- moving contact
- reflecting plate
- contact
- static contact
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Abstract
The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a movable contact structure with curtain. The utility model provides a moving contact structure with curtain, includes moving contact, static contact, base, its characterized in that: a base is arranged below the static contact, a reflecting plate is arranged on one side of the static contact, a moving contact is connected to the reflecting plate through a curtain, the head of the moving contact penetrates through the curtain and is positioned on one side of the reflecting plate, and the tail of the moving contact is positioned on the other side of the reflecting plate; one end of the curtain is attached to the reflecting plate, and the other end of the curtain is bent at the bottom of the static contact and is positioned between the static contact and the base. Compared with the prior art, the moving contact structure with the curtain is provided, high-pressure gas generated by electric arc is utilized to forcibly blow the electric arc to the arc extinguish chamber to extinguish the arc quickly, so that the purposes of high current limiting capacity, short-circuit thermal stress reduction and short-circuit breaking capacity improvement are achieved.
Description
Technical Field
The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a movable contact structure with curtain.
Background
The plastic casing type circuit breaker is a circuit breaker used for a low-voltage distribution network, protects lines and equipment from damage caused by faults such as overload and short circuit, and is also used for infrequent starting of a motor and overload and short circuit protection, so that the safety of a power grid and the equipment is ensured.
The rated short circuit breaking capacity is a key index of the plastic shell type circuit breaker, and factors influencing the breaking of the circuit breaker comprise the design of an exhaust mode in an arc extinguishing system.
The exhaust design in the prior art has the following defects: considering the movement of the moving contact, the shell usually requires that the moving contact is provided with a slot at the position, although the moving slot of the moving contact is as narrow as possible, in the heavy current breaking process, the phenomenon that high-voltage arc gas moves to the outlet end of the circuit breaker through the moving slot of the moving contact still exists, and the arc gas is not beneficial to entering into an arc-extinguishing grid sheet and extinguishing; meanwhile, after high-temperature arc particles enter the rear end of the circuit breaker, other electrical elements can be burnt, and the circuit breaker is caused to lose effectiveness.
Disclosure of Invention
The utility model discloses an overcome prior art not enough, provide a moving contact structure with curtain, the high-pressure gas that utilizes electric arc to produce forces the explosion chamber of blowing to sound with electric arc and makes it extinguish fast to reach high current limiting capacity, reduce short circuit thermal stress, improve the purpose of short circuit breaking capacity.
In order to realize the above purpose, a moving contact structure with a curtain is designed, which comprises a moving contact, a fixed contact and a base, and is characterized in that: a base is arranged below the static contact, a reflecting plate is arranged on one side of the static contact, a moving contact is connected to the reflecting plate through a curtain, the head of the moving contact penetrates through the curtain and is positioned on one side of the reflecting plate, and the tail of the moving contact is positioned on the other side of the reflecting plate; one end of the curtain is attached to the reflecting plate, and the other end of the curtain is bent at the bottom of the static contact and is positioned between the static contact and the base.
The upper end of the reflecting plate is provided with a groove.
The closed position of the static contact is positioned at one side of the reflecting plate, and the middle part of the curtain is attached to the reflecting plate.
The curtain is in a rectangular sheet structure, a curtain mounting hole, a middle end clamping groove and a moving contact clamping groove are sequentially arranged on the curtain from left to right, and the curtain mounting hole of the curtain is respectively connected with the base and the bottom of the static contact through a screw; the middle end clamping groove of the curtain is clamped into the hook of the reflecting plate; the moving contact clamping groove of the curtain is connected with the moving contact; the right end of the curtain is provided with a convex structure.
The curtain is made of an elastic material with electric arc resistance, high temperature resistance and aging resistance.
Compared with the prior art, the utility model, a moving contact structure with curtain is provided, the high-pressure gas that utilizes electric arc to produce forces the explosion chamber of blowing with electric arc to make it extinguish fast to reach high current limiting capacity, reduce short circuit thermal stress, improve the purpose of short circuit breaking capacity.
The air blocking curtain is hung at the front part of the moving contact, and under the condition of meeting the moving requirement of the moving contact, the air blocking back-spraying channel of the arc gas is blocked, so that a relatively closed space is formed in the arc extinguish chamber, and the high-pressure gas generated during breaking is forced to move towards the direction of the exhaust port, so that the arc is forced to rapidly enter the arc extinguish grid sheet to extinguish, and other components and parts caused by the back-spraying of the arc are prevented from being damaged and losing efficacy.
Drawings
Fig. 1 is a schematic diagram of the opening state of the present invention.
Fig. 2 is the schematic diagram of the closing state of the utility model.
Fig. 3 is a schematic view of the curtain structure.
Fig. 4 is a schematic diagram of a closing state of the circuit breaker.
Fig. 5 is a schematic diagram of the opening state of the circuit breaker.
Referring to fig. 1 to 5, 1 is a reflection plate, 11 is a hook, 2 is a base, 3 is a screw, 4 is a fixed contact, 5 is a curtain, 51 is a curtain mounting hole, 52 is a middle end clamping groove, 53 is a movable contact clamping groove, and 6 is a movable contact.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 5, a base 2 is arranged below a static contact 4, a reflecting plate 1 is arranged on one side of the static contact 4, a moving contact 6 is connected to the reflecting plate 1 through a curtain 5, the head of the moving contact 6 penetrates through the curtain 5 and is located on one side of the reflecting plate 1, and the tail of the moving contact 6 is located on the other side of the reflecting plate 1; one end of the curtain 5 is attached to the reflecting plate 1, and the other end of the curtain 5 is bent at the bottom of the static contact 4 and is positioned between the static contact 4 and the base 2.
The upper end of the reflecting plate 1 is provided with a groove.
The closed position of the static contact 4 is positioned at one side of the reflecting plate 1, and the middle part of the curtain 5 is attached to the reflecting plate 1.
The curtain 5 is in a rectangular sheet structure, a curtain mounting hole 51, a middle end clamping groove 52 and a moving contact clamping groove 53 are sequentially arranged on the curtain 5 from left to right, and the curtain mounting hole 51 of the curtain 5 is respectively connected with the base 2 and the bottom of the static contact 4 through a screw 3; the middle end clamping groove 52 of the curtain 5 is clamped into the hook 11 of the reflecting plate 1; the moving contact clamping groove 53 of the curtain 5 is connected with the moving contact 6; the right end of the curtain 5 is provided with a convex structure.
The curtain 5 is made of an elastic material with electric arc resistance, high temperature resistance and aging resistance.
The air blocking curtain 5 is hung on the front part of the moving contact 6, and an arc gas post-spraying channel is blocked under the condition that the motion requirement of the moving contact 6 is met, so that a relatively closed space is formed in the arc extinguish chamber, high-pressure gas generated during breaking is forced to move towards the direction of an exhaust port, the arc is forced to rapidly enter the arc extinguish grid sheet to extinguish, and other components and parts caused by arc post-spraying are prevented from being damaged and losing efficacy.
The curtain 5 is used as a structure for blocking air, the curtain 5 is made of an elastic material with arc resistance, high temperature resistance and aging resistance, and the reflecting plate 1 can be well attached to ensure that the free motion of the moving contact 6 is not influenced, so that the effective contact between the moving contact 6 and the fixed contact 4 is avoided being blocked, meanwhile, the curtain can be driven by the moving contact 6 when being disconnected, and a space groove for blocking the motion of the moving contact 6 is blocked. As shown in fig. 4 and 5, the curtain 5 is in a retracted superposed state in a closing state of the circuit breaker, when the circuit breaker is disconnected and opened, the moving contact and the fixed contact are disconnected, the curtain 5 is repelled together with the moving contact 6, the curtain 5 does not fall off in the repelling process, the curtain 5 is in a completely opened and stretched state at the moment, the curtain 5 is hardly stressed, the width of the curtain 5 is designed to meet the air blocking requirement, and the electric arc post-spraying can be effectively prevented.
The high-pressure gas generated by the electric arc is utilized to force the electric arc to blow the arc extinguish chamber to extinguish the arc quickly, thereby achieving the purposes of high current limiting capacity, short-circuit thermal stress reduction and short-circuit breaking capacity improvement.
Claims (5)
1. The utility model provides a moving contact structure with curtain, includes moving contact, static contact, base, its characterized in that: a base (2) is arranged below the static contact (4), a reflecting plate (1) is arranged on one side of the static contact (4), a moving contact (6) is connected to the reflecting plate (1) through a curtain (5), the head of the moving contact (6) penetrates through the curtain (5) and is positioned on one side of the reflecting plate (1), and the tail of the moving contact (6) is positioned on the other side of the reflecting plate (1); one end of the curtain (5) is attached to the reflecting plate (1), and the other end of the curtain (5) is bent at the bottom of the static contact (4) and is positioned between the static contact (4) and the base (2).
2. A moving contact structure with shutter according to claim 1, characterized in that: the upper end of the reflecting plate (1) is provided with a groove.
3. A moving contact structure with shutter according to claim 1, characterized in that: the closed position of the static contact (4) is positioned at one side of the reflecting plate (1), and the middle part of the curtain (5) is attached to the reflecting plate (1).
4. A moving contact structure with shutter according to claim 1 or 3, characterized in that: the curtain (5) is of a rectangular sheet structure, a curtain mounting hole (51), a middle end clamping groove (52) and a moving contact clamping groove (53) are sequentially arranged on the curtain (5) from left to right, and the curtain mounting hole (51) of the curtain (5) is respectively connected with the bottoms of the base (2) and the static contact (4) through a screw (3); a middle end clamping groove (52) of the curtain (5) is clamped into a hook (11) of the reflecting plate (1); a moving contact clamping groove (53) of the curtain (5) is connected with a moving contact (6); the right end of the curtain (5) is provided with a convex structure.
5. A moving contact structure with shutter according to claim 1, characterized in that: the curtain (5) is made of an elastic material with electric arc resistance, high temperature resistance and aging resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610082.2U CN211929327U (en) | 2020-04-22 | 2020-04-22 | Moving contact structure with curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610082.2U CN211929327U (en) | 2020-04-22 | 2020-04-22 | Moving contact structure with curtain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211929327U true CN211929327U (en) | 2020-11-13 |
Family
ID=73328652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020610082.2U Active CN211929327U (en) | 2020-04-22 | 2020-04-22 | Moving contact structure with curtain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211929327U (en) |
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2020
- 2020-04-22 CN CN202020610082.2U patent/CN211929327U/en active Active
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