CN217740428U - Circuit breaker major loop structure - Google Patents
Circuit breaker major loop structure Download PDFInfo
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- CN217740428U CN217740428U CN202221172347.0U CN202221172347U CN217740428U CN 217740428 U CN217740428 U CN 217740428U CN 202221172347 U CN202221172347 U CN 202221172347U CN 217740428 U CN217740428 U CN 217740428U
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- connecting plate
- circuit breaker
- main circuit
- circuit structure
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- 230000006835 compression Effects 0.000 claims description 6
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- 230000009286 beneficial effect Effects 0.000 description 4
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Abstract
The utility model discloses a main circuit structure of a circuit breaker, which comprises a vacuum arc extinguish chamber, wherein a static contact is arranged in an inner cavity of the vacuum arc extinguish chamber; a contact component is arranged on one side of the static contact in a relatively sliding manner; one end of the contact assembly is arranged in the vacuum arc extinguish chamber cavity and is in contact with or separated from the fixed contact, the other end of the contact assembly extends out of the vacuum arc extinguish chamber and is hinged with one end of a first connecting plate, the other end of the first connecting plate is hinged with one end of a second connecting plate, and the other end of the second connecting plate is hinged with the support; the first elastic piece is connected between the first connecting plate and the second connecting plate, and the elastic force of the first elastic piece drives the first connecting plate and the second connecting plate to be close to each other. When the switching-on force F drives the circuit breaker to switch on, the force of the elastic pulling force of the first elastic piece in the vertical direction is small, the switching-on of the circuit breaker is facilitated, meanwhile, the switching-on position is guaranteed to be in a state (namely a dead point critical position of a connecting rod mechanism) that the included angle of the first connecting plate and the second connecting plate is close to and smaller than 180 degrees, the circuit breaker is reliably kept in a switching-on state, and meanwhile, the switching-off operation of the circuit breaker is facilitated by using small driving force.
Description
Technical Field
The utility model belongs to the technical field of high-voltage power transmission and distribution equipment, concretely relates to circuit breaker major loop structure.
Background
The circuit breaker is a frequently used equipment in transmission and distribution network, the major loop structure of circuit breaker is mostly "direct action type", closing drive power is unanimous with moving contact direction of motion promptly, perhaps be "many connecting rods formula", provide closing drive power through the combination of multiple link mechanism promptly, above-mentioned structure is though using ripe, but when circuit breaker switching-on state, need circuit breaker operating device to provide very big switching-on work and close a floodgate, all need use specific mechanism holding device to offset the reaction force of contact pressure spring and separating brake spring when circuit breaker switching-on state simultaneously.
Disclosure of Invention
The utility model provides a circuit breaker major loop structure, its aim at solve the circuit breaker power of closing a floodgate too big, the too complicated problem of combined floodgate retaining mechanism provides a new circuit breaker design simultaneously.
In order to achieve the above purpose, the utility model provides a main circuit structure of a circuit breaker, which comprises a vacuum arc extinguish chamber, wherein a static contact is arranged in an inner cavity of the vacuum arc extinguish chamber; a contact component is arranged on one side of the fixed contact in a relatively sliding manner;
one end of the contact assembly is arranged in the vacuum arc extinguishing chamber cavity and is in contact with or separated from the static contact, the other end of the contact assembly extends out of the vacuum arc extinguishing chamber and is hinged with one end of a first connecting plate, the other end of the first connecting plate is hinged with one end of a second connecting plate, and the other end of the second connecting plate is hinged with the support;
the first elastic piece is connected between the first connecting plate and the second connecting plate, and the elastic force of the first elastic piece drives the first connecting plate and the second connecting plate to be close to each other.
Preferably, the elastic direction of the first elastic member coincides with the sliding direction of the contact assembly.
Preferably, the moving direction of the hinge joint of the contact assembly and the first connecting plate relative to the hinge joint of the support and the second connecting plate is the same as the sliding direction of the contact assembly, and two ends of the first elastic element are respectively connected with the hinge joint between the support and the first connecting plate and the hinge joint between the contact assembly and the second connecting plate.
Preferably, the contact assembly is hinged to the first connecting plate through a first pin, the first connecting plate is hinged to the second connecting plate through a second pin, and the second connecting plate is hinged to the support through a third pin.
Preferably, the first elastic piece is a tension spring, and two ends of the tension spring are respectively connected with the third pin and the first pin.
Preferably, a sliding groove is formed between the second connecting plate and the vacuum arc-extinguishing chamber, and the contact assembly is arranged in the sliding groove in a sliding manner.
Preferably, the contact assembly comprises a moving contact and an insulating pull rod;
the moving contact is connected with the side wall of the vacuum arc extinguishing chamber in a sliding manner, one end of the moving contact is arranged in the cavity of the vacuum arc extinguishing chamber, the other end of the moving contact extends out of the vacuum arc extinguishing chamber and is connected with one end of the insulating pull rod, and the other end of the insulating pull rod is hinged with the first connecting plate.
Preferably, the moving contact and the end part of the insulating pull rod close to each other are in relative sliding connection, and a second elastic element for driving the insulating pull rod and the moving contact to be far away is arranged between the insulating pull rod and the moving contact.
Preferably, one end of the insulating pull rod, which is close to the moving contact, is provided with a thin rod, the thin rod is arranged in a blind hole in the end part of the moving contact in a sliding manner, the second elastic element is a pressure spring, the pressure spring is sleeved outside the thin rod, and two ends of the pressure spring are respectively contacted with the moving contact and the insulating pull rod.
Preferably, a waist hole is formed in one end of the thin rod along the sliding direction of the movable contact, and a limiting pin matched with the waist hole is arranged in the blind hole.
To sum up, the utility model discloses following beneficial effect has:
when the switching-on force F drives the circuit breaker to be switched on, the elastic pulling force of the first elastic piece and the restoring force of the second elastic piece mainly act in the horizontal direction, the force in the vertical direction is small, the switching-on of the circuit breaker is facilitated, meanwhile, the switching-on position is ensured to be in a state that the included angle between the first connecting plate and the second connecting plate is close to or smaller than 180 degrees (namely the critical position of a dead point of the connecting rod mechanism), the circuit breaker is facilitated to be reliably kept in a switching-on state, and meanwhile, the switching-off operation of the circuit breaker is facilitated to be achieved by using small driving force.
Drawings
Fig. 1 is a schematic structural diagram of a circuit breaker circuit structure provided by the present invention;
fig. 2 is the connection structure schematic diagram of the middle moving contact and the insulating pull rod of the utility model.
In the figure:
1. a first pin;
2. a first elastic member;
3. a second pin;
4. a first link plate;
5. a third pin;
6. a second link plate;
7. a chute;
8. an insulating pull rod;
9. a second elastic member;
10. a limit pin;
11. a moving contact;
12. a vacuum arc-extinguishing chamber;
13. static contact;
14. and (4) a support.
15. A thin rod;
16. blind holes;
17. a waist hole;
F. and (4) closing the brake.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
Referring to fig. 1, the utility model provides a circuit breaker main loop structure, can combine with current high-voltage circuit breaker structure, form a complete circuit breaker structure, it includes vacuum interrupter 12, vacuum interrupter 12 internal cavity right side fixedly connected with static contact 13, be located static contact 13 one side, relative static contact 13 slides and is provided with contact assembly, contact assembly one end sets up in vacuum interrupter 12 cavity, can contact with static contact 13 or separate along with the slip of contact assembly, in order to realize the closing and separating brake operation of circuit breaker, the other end stretches out vacuum interrupter 12, it has one end of first link plate 4 to articulate through first pin 1, the other end of first link plate 4 articulates through second pin 3 has one end of second link plate 6, the other end of second link plate 6 articulates through third pin 5 and connects fixed support 14; the first elastic member 2 is connected between the first link plate 4 and the second link plate 6, and the elastic force of the first elastic member 2 causes the second link plate 6 and the first link plate 4 to approach each other. When the switching-on force F applied by the external operating mechanism acts on the first connecting plate 4 and the second connecting plate 6 downwards, the contact assembly slides rightwards, the end part in the vacuum arc extinguish chamber 12 is in contact with the static contact 13, switching-on operation is achieved, and when the switching-on force F is removed, the first connecting plate 4 and the second connecting plate 6 are driven by the elastic force of the first elastic piece 2 to approach each other, the end part of the contact assembly is driven to be separated from the static contact 13, and switching-off operation is achieved. For the sliding stability of the contact assembly, a sliding slot 7 is provided between the first connecting plate 4 and the vacuum interrupter 12, and the contact assembly is slidably disposed in the sliding slot 7.
Preferably, the elastic direction of the first elastic element 2 is consistent with the sliding direction of the contact assembly, specifically, the moving direction of the hinge joint of the contact assembly and the first connecting plate 4 relative to the hinge joint of the support 14 and the second connecting plate 6 is the same as the sliding direction of the contact assembly, and two ends of the first elastic element 2 are respectively connected to the hinge joint between the support 14 and the second connecting plate 6 and the hinge joint between the contact assembly and the first connecting plate 4; the first elastic part 2 is a tension spring, and two ends of the tension spring are connected with the third pin 5 and the first pin 1 respectively.
The contact component comprises a moving contact 11 and an insulating pull rod 8, the moving contact 11 is connected with the left side wall of the vacuum arc-extinguishing chamber 12 in a sliding mode, one end of the moving contact is arranged in a cavity of the vacuum arc-extinguishing chamber 12, the other end of the moving contact extends out of the vacuum arc-extinguishing chamber 12 and is connected with one end of the insulating pull rod 8, and the other end of the insulating pull rod 8 is hinged with the first connecting plate 4. The insulating pull rod 8 plays an insulating role, and the sliding groove 7 is matched with the insulating pull rod 8.
Preferably, referring to fig. 1 and 2, the movable contact 11 and the end portion of the insulating rod 8 close to each other are connected in a relatively sliding manner, and a second elastic element 9 for making the insulating rod 8 and the movable contact 11 tend to move away from each other is further disposed between the insulating rod 8 and the movable contact 11. Specifically, one end of the insulating pull rod 8 close to the moving contact 11 is provided with a thin rod 15, the thin rod 15 is arranged in a blind hole 16 at the end of the moving contact 11 in a sliding manner, the second elastic element 9 is a compression spring and is sleeved outside the thin rod 15, one end of the compression spring is in non-fixed contact with the insulating pull rod 8, and the other end of the compression spring is in non-fixed contact with the moving contact 11. The insulating pull rod 8 moves rightwards, power acts on the moving contact 11 through the second elastic piece 9, the moving contact 11 can be in relative sliding connection with the insulating pull rod 8, and in a closing state, the pressure spring can provide pressure and contact stroke of the static contact.
One end of the thin rod 15 is provided with a waist hole 17 along the sliding direction of the movable contact 11, a limiting pin 10 matched with the waist hole 17 is arranged in the blind hole 16, and the waist hole 17 and the limiting pin 10 are matched to limit the sliding distance of the movable contact 11 relative to the insulating pull rod 8.
When the utility model is used for switching on, the switching-on force F drives the first connecting plate 4 and the second connecting plate 6 to move downwards, the first connecting plate 4 pushes the contact assembly to move rightwards, so that the end part of the contact assembly is contacted with the static contact 13 to complete the switching on, at the moment, the first elastic part 2 is stretched, and the second elastic part 9 is compressed; the closing force F drives the second connecting plate 6 and the first connecting plate 4 to have an included angle close to but less than 180 degrees (namely a critical position of a dead point), so that the breaker is in a closing state.
When the brake is opened, the brake closing force F is cancelled, the connecting rod A and the connecting rod B which are positioned at the critical position of a dead point are automatically unlocked, and the contact assembly moves leftwards under the action of the first elastic piece 2 to complete the brake opening.
In summary, when the closing force F drives the circuit breaker to close, the elastic pulling force of the first elastic element 2 and the restoring force of the second elastic element 9 mainly act in the horizontal direction, and the force in the vertical direction is smaller, which is beneficial to closing the circuit breaker, and meanwhile, the closing position is ensured in a state where the included angle between the first connecting plate 4 and the second connecting plate 6 is close to and less than 180 ° (i.e. the "dead point" critical position of the link mechanism), which is beneficial to reliably maintaining the circuit breaker in the closing state, and is also beneficial to using a smaller driving force to realize the opening operation of the circuit breaker.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A main circuit structure of a circuit breaker is characterized by comprising a vacuum arc-extinguishing chamber (12), wherein a static contact (13) is arranged in an inner cavity of the vacuum arc-extinguishing chamber; a contact component is arranged on one side of the fixed contact (13) in a relatively sliding manner;
one end of the contact component is arranged in a cavity of the vacuum arc-extinguishing chamber (12) and is in contact with or separated from the static contact (13), the other end of the contact component extends out of the vacuum arc-extinguishing chamber (12) and is hinged with one end of a first connecting plate (4), the other end of the first connecting plate (4) is hinged with one end of a second connecting plate (6), and the other end of the second connecting plate (6) is hinged with a support (14);
a first elastic piece (2) is connected between the first connecting plate (4) and the second connecting plate (6), and the elastic force of the first elastic piece (2) enables the first connecting plate (4) and the second connecting plate (6) to tend to approach.
2. The main circuit structure of circuit breaker according to claim 1, wherein the direction of the elastic force of the first elastic member (2) is in accordance with the sliding direction of the contact assembly.
3. A circuit breaker main circuit structure according to claim 2, characterized in that the moving direction of the joint of the contact assembly and the first link plate (4) relative to the joint of the support (14) and the second link plate (6) is the same as the sliding direction of the contact assembly, and the two ends of the first elastic member (2) are respectively connected to the joint between the support (14) and the first link plate (4) and the joint between the contact assembly and the second link plate (6).
4. A circuit breaker main circuit structure according to any one of claims 1-3, wherein said contact assembly is hingedly connected to said first link plate (4) by a first pin (1), said first link plate (4) is hingedly connected to said second link plate (6) by a second pin (3), and said second link plate (6) is hingedly connected to said support (14) by a third pin (5).
5. The main circuit structure of circuit breaker according to claim 4, wherein said first elastic member (2) is a tension spring, and two ends of said tension spring are respectively connected to said third pin (5) and said first pin (1).
6. A circuit breaker main circuit structure according to claim 1, characterized in that a sliding slot (7) is provided between the second link plate (6) and the vacuum interrupter (12), and the contact assembly is slidably disposed in the sliding slot (7).
7. A circuit breaker main circuit structure according to claim 1, characterized in that said contact assembly comprises a movable contact (11) and an insulating tie (8);
moving contact (11) sliding connection vacuum interrupter (12) lateral wall, its one end sets up in the cavity of vacuum interrupter (12), and the other end stretches out vacuum interrupter (12), is connected with insulating pull rod (8) one end, insulating pull rod (8) other end is articulated first even board (4).
8. The main circuit structure of a circuit breaker according to claim 7, wherein said movable contact (11) and the end portion of said insulating rod (8) close to each other are slidably connected to each other, and a second elastic member (9) is disposed between said insulating rod (8) and the movable contact (11) to make them tend to move away from each other.
9. The main circuit structure of the circuit breaker according to claim 8, wherein one end of the insulating pull rod (8) close to the movable contact (11) is provided with a thin rod (15), the thin rod (15) is slidably disposed in a blind hole (16) at the end of the movable contact (11), the second elastic member (9) is a compression spring, the compression spring is sleeved outside the thin rod (15), and two ends of the compression spring are respectively in contact with the movable contact (11) and the insulating pull rod (8).
10. The main circuit structure of the circuit breaker according to claim 9, wherein a waist hole (17) is formed in one end of the thin rod (15) along the sliding direction of the movable contact (11), and a limit pin (10) matched with the waist hole (17) is arranged in the blind hole (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221172347.0U CN217740428U (en) | 2022-05-16 | 2022-05-16 | Circuit breaker major loop structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221172347.0U CN217740428U (en) | 2022-05-16 | 2022-05-16 | Circuit breaker major loop structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217740428U true CN217740428U (en) | 2022-11-04 |
Family
ID=83837479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221172347.0U Active CN217740428U (en) | 2022-05-16 | 2022-05-16 | Circuit breaker major loop structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217740428U (en) |
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2022
- 2022-05-16 CN CN202221172347.0U patent/CN217740428U/en active Active
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