CN217606762U - Forced arc isolation device and circuit breaker - Google Patents
Forced arc isolation device and circuit breaker Download PDFInfo
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- CN217606762U CN217606762U CN202220195821.5U CN202220195821U CN217606762U CN 217606762 U CN217606762 U CN 217606762U CN 202220195821 U CN202220195821 U CN 202220195821U CN 217606762 U CN217606762 U CN 217606762U
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Abstract
The utility model relates to a low-voltage electric field, concretely relates to forced arc isolation device, which is applied to a circuit breaker and comprises an arc isolation piece and a driving connecting rod which are arranged on a shell of the circuit breaker in a sliding way, wherein the arc isolation piece comprises an arc isolation end, one end of the driving connecting rod is hinged with the arc isolation piece, and the other end is hinged with an operating mechanism of the circuit breaker; when the moving contact and the fixed contact of the circuit breaker are disconnected, the operating mechanism drives the arc isolating piece to slide through the driving connecting rod, so that the arc isolating end moves into a position between the moving contact and the fixed contact; when the moving contact and the static contact are closed, the operating mechanism drives the arc isolating piece to slide through the driving connecting rod, so that the arc isolating end is moved out from between the moving contact and the static contact; the forced arc-isolating device is simple in structure and can isolate direct-current electric arcs. The utility model also provides an include the circuit breaker of forced arc insulation device, its breaking capacity is good with the arc extinguishing ability.
Description
Technical Field
The utility model relates to a low-voltage electrical field, concretely relates to force arc insulation device and one kind include force arc insulation device's circuit breaker.
Background
In the existing circuit breaker, particularly in the direct current field, when a product is disconnected, an electric arc cannot be cut off, and in the electric service life test process, the circuit breaker is easy to lose effectiveness due to continuous arcing when the product is opened; therefore, a forced arc-isolating device applied to a circuit breaker is required to be designed to effectively cut off a direct current arc.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a forced arc-isolating device which has simple structure and can isolate direct current arc; the circuit breaker comprising the forced arc-isolating device is good in breaking capacity and arc extinguishing capacity.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a forced arc-isolating device is applied to a circuit breaker; the forced arc isolation device comprises an arc isolation piece and a driving connecting rod which are arranged on a shell of the circuit breaker in a sliding mode, the arc isolation piece comprises an arc isolation end, one end of the driving connecting rod is hinged with the arc isolation piece, and the other end of the driving connecting rod is hinged with an operating mechanism of the circuit breaker;
when the moving contact and the static contact of the circuit breaker are disconnected, the operating mechanism drives the arc isolating piece to slide through the driving connecting rod, so that the arc isolating end moves between the moving contact and the static contact; when the moving contact and the fixed contact are closed, the operating mechanism drives the arc isolating piece to slide through the driving connecting rod, so that the arc isolating end is moved out from between the moving contact and the fixed contact.
Preferably, the operating mechanism comprises a contact support for bearing the moving contact, and the contact support drives the moving contact to rotate so as to be closed or disconnected with the static contact; the other end of the driving connecting rod is hinged with the contact support.
Preferably, the driving link is a straight rod-shaped structure.
Preferably, the arc isolating piece is linearly arranged on the shell in a sliding manner; after the moving contact and the fixed contact are disconnected, the connecting line of the two hinged points of the driving connecting rod has the largest included angle with the sliding direction of the arc isolating piece; after the moving contact and the fixed contact are closed, the included angle between the connecting line of the two hinged points of the driving connecting rod and the sliding direction of the arc isolating piece is minimum.
Preferably, the forced arc-isolating device further comprises a guide rail structure arranged on the housing, and the arc-isolating piece is arranged on the guide rail structure in a sliding manner.
Preferably, the guide rail structure includes a guide rail groove provided on the housing, and the arc blocking member includes an arc blocking member sliding portion slidably provided in the guide rail groove.
Preferably, the arc-isolating piece sliding part is hinged with the driving connecting rod; the arc separation piece further comprises an arc separation piece transition part, the arc separation end, the arc separation piece transition part and the arc separation piece sliding part are sequentially connected and integrally form a Z-shaped structure, and the arc separation end and the arc separation piece sliding part are of flat plate structures and are arranged in a staggered parallel mode.
Preferably, the arc-isolating piece further comprises an arc-isolating piece hinged shaft arranged on the arc-isolating piece sliding portion, the arc-isolating piece sliding portion is hinged to the driving connecting rod through the arc-isolating piece hinged shaft, and the axis of the arc-isolating piece hinged shaft, the arc-isolating piece sliding portion and the arc-isolating end are arranged in parallel and perpendicular to the arc-isolating piece transition portion.
A circuit breaker comprises the forced arc-isolating device.
Preferably, the arc blocking member of the forced arc blocking device is linearly slidably disposed between the operating mechanism and the short-circuit protection mechanism of the circuit breaker, and between the moving contact and the fixed contact.
The forced arc-isolating device of the utility model has simple structure and reliable transmission; when the moving contact and the static contact are disconnected, the arc isolating end of the arc isolating piece is inserted between the moving contact and the static contact to isolate the electric arc between the moving contact and the static contact, so that the aim of quickly extinguishing the electric arc is fulfilled; the arc isolating end of the arc isolating piece is moved out from between the moving contact and the static contact when the moving contact and the static contact are disconnected, and the normal closing of the moving contact and the static contact cannot be influenced.
The utility model discloses circuit breaker, it includes force the arc-isolating device, breaking capacity and arc extinguishing ability are good.
Drawings
Fig. 1 is a schematic projection structure diagram of the circuit breaker in the opening state of the present invention;
fig. 2 is a schematic view of a projected structure of the circuit breaker in a closing state of the present invention;
fig. 3 is a schematic view of a projection structure of the circuit breaker in the opening state of the present invention, showing the connection relationship between the driving link and the contact support;
fig. 4 is an exploded view of the contact support, moving contact, drive link and arc barrier of the present invention;
fig. 5 is a schematic structural diagram of the housing of the present invention.
Detailed Description
The following describes the embodiments of the forced arc-isolating device and the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 5. The forced arc-isolating device and the circuit breaker of the present invention are not limited to the description of the following embodiments.
As shown in fig. 1-3, the utility model discloses circuit breaker includes casing 5 and sets up operating device and the contact system in casing 5, and the contact system includes moving contact 3 and the static contact 6 that the cooperation was used, and operating device is including the contact support 4 that is used for bearing moving contact 3, and contact support 4 drives moving contact 3 swing and makes it and static contact 6 closed or break off, also makes circuit breaker combined floodgate or separating brake.
It is to be noted that the operating mechanism can be implemented by the prior art; specifically, as shown in fig. 1-2: the operating mechanism comprises a handle and a rotating plate which are respectively and rotatably arranged on the shell 5, a first connecting rod, a jump buckle and a lock catch which are respectively and rotatably arranged on the rotating plate and matched with the lock catch, and a contact support 4; the handle is connected with the jump buckle through a first connecting rod in a driving mode, and the rotating plate is connected with the contact support 4 in a driving mode. Further, the rotating plate is elastically connected with the contact support 4 through a contact torsion spring.
As shown in fig. 1-2, the circuit breaker of the present invention further comprises a short-circuit protection mechanism and an overload protection mechanism, which are respectively driven by the latch to cooperate with each other, wherein when the short-circuit protection mechanism or the overload protection mechanism is in short-circuit or overload failure, the drive latch rotates to enable the latch to cooperate with the trip latch, so that the operating mechanism is tripped.
As shown in fig. 1-4, the forced arc isolating device of the present invention, applied to the circuit breaker, includes an arc isolating member 1 and a driving connecting rod 2 slidably disposed on a housing 5, wherein the arc isolating member 1 includes an arc isolating end 1-0, one end of the driving connecting rod 2 is hinged to the arc isolating member 1, and the other end is hinged to an operating mechanism of the circuit breaker; when the moving contact 3 and the static contact 6 are disconnected, namely when the circuit breaker is opened, the operating mechanism drives the arc isolating piece 1 to slide through the driving connecting rod 2, so that the arc isolating end 1-0 moves between the moving contact 3 and the static contact 6; when the moving contact 3 and the static contact 6 are closed, namely when the circuit breaker is switched on, the operating mechanism drives the arc isolating piece 1 to slide through the driving connecting rod 2, so that the arc isolating end 1-0 is moved out from between the moving contact 3 and the static contact 6. Further, when the moving contact 3 and the static contact 6 are disconnected, the arc isolating piece 1 slides to the first direction; when the moving contact 3 and the static contact 6 are closed, the arc isolating piece 1 slides towards the second direction, and the first direction and the second direction are opposite.
Specifically, as shown in fig. 1, when the moving contact 3 and the static contact 6 are disconnected, the arc isolating member 1 slides downward to move into between the moving contact 3 and the static contact 6, so as to isolate an electric arc generated between the two; as shown in fig. 2, when the moving contact 3 and the fixed contact 6 are closed, the arcing barrier 1 slides upwards to move out from between the moving contact 3 and the fixed contact 6.
The forced arc-isolating device of the utility model has simple structure and reliable transmission; when the moving contact 3 and the static contact 6 are disconnected, the arc isolating end 1-0 of the arc isolating piece 1 is inserted between the moving contact 3 and the static contact 6 to isolate the electric arc between the moving contact 3 and the static contact 6, thereby achieving the purpose of rapidly extinguishing the electric arc; the arc-isolating end 1-0 of the arc-isolating piece 1 is moved out from between the moving contact 3 and the static contact 6 when the moving contact and the static contact are disconnected, and the normal closing of the moving contact and the static contact can not be influenced.
As shown in fig. 3-4, one end of the driving link 2 is hinged with the arc-isolating piece 1, and the other end is hinged with the contact support 4.
As other embodiments, one end of the driving connecting rod 2 is hinged with the arc isolating piece 1, and the other end is hinged with a rotating plate or a moving contact 3 of the operating mechanism. Theoretically, during the switching-off and switching-on processes of the circuit breaker, parts or structures with position changes can be hinged with the driving connecting rod 2, so that the arc isolating piece 1 is driven to slide by the driving connecting rod 2 through the driving rod.
As shown in fig. 1-4, the drive link 2 is a straight rod-shaped structure. Furthermore, two ends of the driving connecting rod 2 are respectively provided with a hinge hole which is respectively matched with the arc-isolating piece hinge shaft 1-2 of the arc-isolating piece 1 and the supporting hinge shaft 4-0 of the contact support 4.
As another example, the driving link 2 may be a curved link.
As shown in fig. 1-3, the arc-isolating piece 1 is linearly arranged on the shell 5 in a sliding manner; after the moving contact 3 and the static contact 6 are disconnected, the connecting line of the two hinged points of the driving connecting rod 2 has the largest included angle with the sliding direction of the arc-isolating piece 1; after the moving contact 3 and the static contact 6 are closed, the connecting line of the two hinged points of the driving connecting rod 2 has the smallest included angle with the sliding direction of the arc isolating piece 1. Furthermore, after the moving contact 3 and the static contact 6 are disconnected, the connecting line of the two hinge points of the driving connecting rod 2 has the largest included angle with the sliding direction of the arc isolating piece 1 and is an obtuse angle; after the moving contact 3 and the static contact 6 are closed, the connecting line of the two hinged points of the driving connecting rod 2 and the sliding direction of the arc isolating piece 1 form a minimum included angle and an obtuse angle.
As another embodiment, after the moving contact 3 and the fixed contact 6 are disconnected, the connecting line of the two hinge points of the driving connecting rod 2 has the largest included angle with the sliding direction of the arc-isolating piece 1 and is a straight angle; after the moving contact 3 and the static contact 6 are closed, the connecting line of the two hinged points of the driving connecting rod 2 and the sliding direction of the arc isolating piece 1 form the minimum included angle and are acute angles or right angles.
As shown in fig. 1-2 and 5, the forced arc-isolating device of the present invention further comprises a guide rail structure 5-0 disposed on the housing 5, and the arc-isolating member 1 is slidably disposed on the guide rail structure 5-0. Further, the guide rail structure 5-0 comprises a guide rail groove 5-01 arranged on the shell 5, and the arc-isolating piece 1 comprises an arc-isolating piece sliding part 1-1 arranged in the guide rail groove 5-01 in a sliding manner.
Specifically, as shown in fig. 1 to 5, the guide rail structure 5-0 includes two guide rail ribs 5-00 arranged at intervals, and a guide rail groove 5-01 is formed between the two guide rail ribs 5-00. The linear sliding type circuit breaker is characterized in that the arc isolating piece 1 is arranged between an operating mechanism and a short-circuit protection mechanism of the circuit breaker in a linear sliding mode, the moving contact 3 and the static contact 6 are arranged, the linear sliding direction of the arc isolating piece 1 is the vertical direction, the arc isolating piece upwards slides between the operating mechanism and the short-circuit protection mechanism during closing, the arc isolating piece downwards slides between the moving contact 3 and the static contact 6 during opening, the driving connecting rod 2 is obliquely connected between the arc isolating piece 1 and the contact support 4 and is located below a lock catch of the operating mechanism, the arc isolating piece 1 can utilize the space between the operating mechanism and the short-circuit protection mechanism, the gap between the moving contact 3 and the static contact 6, and the matching structure of the contact support 4 is simplified through the driving connecting rod 2.
As shown in fig. 1-2 and 5, the guide rail groove 5-01 is a linear groove.
As other embodiments, the guide rail groove 5-01 is a circular arc-shaped groove.
As shown in fig. 1 to 3, the arc barrier sliding part 1-1 is hinged to the driving link 2.
As shown in fig. 4, the arc-isolating piece 1 further comprises an arc-isolating piece transition part 1-3, an arc-isolating end 1-0, an arc-isolating piece transition part 1-3 and an arc-isolating piece sliding part 1-1 which are sequentially connected and integrally form a zigzag structure, and the arc-isolating end 1-0 and the arc-isolating piece sliding part 1-1 are both of a flat plate structure and are arranged in parallel in a staggered manner.
As shown in fig. 4, the arc-blocking member 1 further comprises an arc-blocking member hinge shaft 1-2 arranged on the arc-blocking member sliding portion 1-1, the arc-blocking member sliding portion 1-1 is hinged to the driving link 2 through the arc-blocking member hinge shaft 1-2, and the axis of the arc-blocking member hinge shaft 1-2 is arranged in parallel with the arc-blocking member sliding portion 1-1 and the arc-blocking end 1-0 and is perpendicular to the arc-blocking member transition portion 1-3. Further, as shown in fig. 4, the arc-isolating piece sliding part 1-1 is an L-shaped structure, and includes a sliding part main plate and a sliding part connecting plate, the sliding part main plate is connected to the arc-isolating piece transition part 1-3, and the arc-isolating piece hinge shaft 1-1 is disposed on the sliding part connecting plate and located in a right-angle gap defined by the sliding part main plate and the sliding part connecting plate.
As shown in fig. 4, the contact support 4 is provided with a support hinge shaft 4-0, and the axis of the support hinge shaft 4-0 is parallel to the rotation axis of the contact support 4. Furthermore, one end of the contact support 4 is a contact mounting part, and the other end is in driving connection with a rotating plate of the operating mechanism; the contact mounting part is provided with a contact clamping groove 4-1 and a contact limiting column 4-2, one end of the moving contact 3 is clamped in the contact clamping groove 4-1, and the other end of the moving contact is provided with a moving contact jack 3-0 matched with the contact limiting column 4-1; and a supporting articulated shaft 4-0 is arranged on the side wall of the contact clamping groove 4-1.
The foregoing is a more detailed description of the present invention, taken in conjunction with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of 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 (10)
1. A forced arc-isolating device is applied to a circuit breaker; the method is characterized in that: the forced arc isolation device comprises an arc isolation part (1) and a driving connecting rod (2) which are arranged on a shell (5) of the circuit breaker in a sliding mode, the arc isolation part (1) comprises an arc isolation end (1-0), one end of the driving connecting rod (2) is hinged to the arc isolation part (1), and the other end of the driving connecting rod is hinged to an operating mechanism of the circuit breaker;
when a moving contact (3) and a static contact (6) of the circuit breaker are disconnected, an operating mechanism drives an arc isolating piece (1) to slide through a driving connecting rod (2), so that an arc isolating end (1-0) moves into a position between the moving contact (3) and the static contact (6); when the moving contact (3) and the static contact (6) are closed, the operating mechanism drives the arc isolating piece (1) to slide through the driving connecting rod (2), so that the arc isolating end (1-0) is moved out from between the moving contact (3) and the static contact (6).
2. The forced arc-insulating device according to claim 1, characterized in that: the operating mechanism comprises a contact support (4) for bearing the moving contact (3), and the contact support (4) drives the moving contact (3) to rotate so as to be closed or opened with the static contact (6); the other end of the driving connecting rod (2) is hinged with the contact support (4).
3. The forced arc-insulating device according to claim 1, characterized in that: the driving connecting rod (2) is of a straight rod-shaped structure.
4. A forced flash barrier according to claim 3, wherein: the arc isolating piece (1) is linearly arranged on the shell (5) in a sliding manner; after the moving contact (3) and the static contact (6) are disconnected, the connecting line of two hinged points of the driving connecting rod (2) has the largest included angle with the sliding direction of the arc isolating piece (1); after the moving contact (3) and the static contact (6) are closed, the connecting line of the two hinged points of the driving connecting rod (2) has the smallest included angle with the sliding direction of the arc isolating piece (1).
5. The forced arc-insulating device according to claim 1, characterized in that: the forced arc-isolating device also comprises a guide rail structure (5-0) arranged on the shell (5), and the arc-isolating piece (1) is arranged on the guide rail structure (5-0) in a sliding manner.
6. The forced arc-insulating device according to claim 5, characterized in that: the guide rail structure (5-0) comprises a guide rail groove (5-01) arranged on the shell (5), and the arc isolating piece (1) comprises an arc isolating piece sliding part (1-1) arranged in the guide rail groove (5-01) in a sliding mode.
7. The forced arc-insulating device according to claim 6, characterized in that: the arc isolating piece sliding part (1-1) is hinged with the driving connecting rod (2); the arc separation piece (1) further comprises an arc separation piece transition part (1-3), an arc separation end (1-0), the arc separation piece transition part (1-3) and an arc separation piece sliding part (1-1) are sequentially connected and integrally form a Z-shaped structure, and the arc separation end (1-0) and the arc separation piece sliding part (1-1) are of flat plate structures and are arranged in parallel in a staggered mode.
8. The forced arc-insulating device according to claim 7, wherein: the arc-isolating piece (1) further comprises an arc-isolating piece hinged shaft (1-2) arranged on the arc-isolating piece sliding portion (1-1), the arc-isolating piece sliding portion (1-1) is hinged to the driving connecting rod (2) through the arc-isolating piece hinged shaft (1-2), and the axis of the arc-isolating piece hinged shaft (1-2) is parallel to the arc-isolating piece sliding portion (1-1) and the arc-isolating end (1-0) and perpendicular to the arc-isolating piece transition portion (1-3).
9. A circuit breaker, characterized in that it comprises a forced flash barrier according to any one of claims 1 to 8.
10. The circuit breaker according to claim 9, characterized in that the arc-isolating member (1) of the forced arc-isolating device is linearly slidably disposed between the operating mechanism and the short-circuit protection mechanism of the circuit breaker, and between the movable contact (3) and the stationary contact (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220195821.5U CN217606762U (en) | 2022-01-24 | 2022-01-24 | Forced arc isolation device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220195821.5U CN217606762U (en) | 2022-01-24 | 2022-01-24 | Forced arc isolation device and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217606762U true CN217606762U (en) | 2022-10-18 |
Family
ID=83563220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220195821.5U Active CN217606762U (en) | 2022-01-24 | 2022-01-24 | Forced arc isolation device and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217606762U (en) |
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2022
- 2022-01-24 CN CN202220195821.5U patent/CN217606762U/en active Active
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