Electric leakage protection actuator and spliced circuit breaker

Abstract

The application discloses a leakage protection execution mechanism, comprising a reset member (8), a lock catch (7), a trip catch (5) and an execution member (6) which are connected in sequence, wherein the middle part of the trip catch (5) is connected with a handle (3), the outside of the handle (3) is connected with a reset member spring (13), and one side of the reset member spring (13) is attached to the reset member (8). Through the mutual linkage of the reset member, the lock catch, the trip catch and the execution member after being pushed by a magnetic ring assembly, the leakage protection execution mechanism can respectively realize the pushing of a trip member and the resetting of the magnetic ring assembly, so that the leakage protection execution mechanism can be simultaneously applied to an electronic trip device and an electromagnetic trip device, and has the characteristics of high stability and good resetting effect.

Description

TECHNICAL FIELD

[0001] The application relates to a circuit breaker, in particular to a leakage protection actuator and a spliced circuit breaker. BACKGROUND

[0002] The circuit breaker is generally composed of a contact system, an arc extinguishing system, an actuator and a tripping device. When leakage or short circuit occurs in an external line, the tripping device acts to push the tripping part in the actuator, and through the cooperation of the actuator, the moving and static contacts are separated from each other, so that the circuit breaker is tripped. The tripping device commonly used in the circuit breaker is divided into an electronic tripping device and an electromagnetic tripping device. The electronic tripping device is mainly used for leakage protection of the circuit breaker, while the electromagnetic tripping device can only be used for short circuit protection of the circuit breaker. However, the electronic tripping device needs to be used in cooperation with an auxiliary power supply and a line board, thus increasing the overall size of the leakage protection mechanism and reducing the applicability of the circuit breaker.

[0003] The reason why the electromagnetic tripping device cannot be used as the leakage protection mechanism of the circuit breaker mainly consists of two aspects. On the one hand, the tripping force generated by the electromagnetic tripping device under the action of the leakage current is small, so it is difficult to directly push the external actuator to act, thus failing to realize stable disconnection of the circuit breaker. On the other hand, the electromagnetic tripping device lacks a reset spring compared with the electronic tripping device, so that the electromagnetic tripping device needs to be reset externally after being pushed out, which is difficult to reset, so it cannot be directly used for leakage protection of the circuit breaker. Therefore, a leakage protection mechanism suitable for the electromagnetic tripping device is needed, so as to effectively improve the applicability of the circuit breaker and reduce the production cost. SUMMARY

[0004] The application aims to provide a leakage protection actuator and a spliced circuit breaker. The leakage protection actuator can be applied to both the electronic tripping device and the electromagnetic tripping device, and has the characteristics of high stability and good reset effect.

[0005] The technical scheme of the application is as follows: the leakage protection actuator comprises a reset part, a lock part, a trip part and an actuating part which are connected in sequence, the trip part is connected with a handle in the middle, the handle is externally connected with a reset spring, and one side of the reset spring is in close contact with the reset part.

[0006] In the aforementioned leakage protection actuator, a base is further included, the handle, the reset part, the lock part and the actuating part are rotatably connected to the base, and the handle, the actuating part and the lock part are externally connected with driving parts.

[0007] In the aforementioned leakage protection actuator, a handle spring is arranged between the handle and the base, an actuating part spring is arranged between the actuating part and the base, and a lock part spring is arranged between the lock part and the base.

[0008] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0009] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0010] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0011] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0012] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0013] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0014] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0015] The aforementioned leakage protection actuator is provided with a linkage rod on the actuator, one end of the trip buckle is rotatably connected to the linkage rod, and the trip buckle is provided with a trip buckle spring.

[0016] Compared with the prior art, the present application has the following characteristics:

[0017] (1) The present application sequentially connects the reset member, the lock buckle, the trip buckle and the actuator, so that the magnetic ring assembly can push the reset member when leakage occurs, and sequentially drive each component to link, thereby driving the actuator to realize the tripping action, thereby achieving leakage protection of the circuit breaker; during the linkage process, the push force of the magnetic ring assembly can be converted into the elastic force generated by the driving member, so that the present application has sufficient push force to drive the tripping member to act and disconnect;

[0018] (2) After the multi-pole circuit breaker is tripped, the reset member can be reset through the cooperation of the handle and the reset member spring, so that the reset member can push the push-out part in the magnetic ring assembly back, thereby realizing external reset of the electromagnetic tripping device, and making the present application applicable to both electronic tripping devices and electromagnetic tripping devices;

[0019] (3) Through the optimization of the connection structure of each component, the stability of each component during operation can be effectively improved, and the interference caused by burrs, friction and the like can be avoided, thereby effectively improving the operation stability of the present application during leakage protection and closing;

[0020] (4) In the above cooperation, the present application can be independently provided with the existing multi-pole circuit breaker and can be used in splicing with the multi-pole circuit breaker, thereby effectively reducing the assembly difficulty of the leakage protection actuator and improving the applicability thereof;

[0021] Therefore, the present application can be simultaneously applied to electronic release and electromagnetic release, and has the characteristics of high stability and good reset effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a splicing type circuit breaker;

[0023] Figure 2 is a connection schematic diagram of a leakage protection actuator and a magnetic ring assembly;

[0024] Figure 3 is a structural schematic diagram of a leakage protection actuator in a circuit breaker opening state;

[0025] Figure 4 is a structural schematic diagram of a leakage protection actuator in a circuit breaker closing state;

[0026] Figure 5 is an exploded view of a leakage protection actuator.

[0027] The marks in the drawings are: 1-magnetic ring assembly, 2-base, 3-handle, 4-linkage, 5-jump buckle, 6-executing piece, 7-lock buckle, 8-resetting piece, 9-handle spring, 10-executing piece spring, 11-lock buckle spring, 12-jump buckle spring, 13-resetting piece spring, 14-cover, 15-bus bar, 16-multi-pole circuit breaker, 301-pressing block, 501-buckling block, 601-linkage rod, 701-driving plate, 702-step groove, 801-push plate, 802-limiting groove. DETAILED DESCRIPTION

[0028] The present application will be further described below in combination with the drawings and examples, but it is not taken as the basis for limiting the present application.

[0029] Example. The leakage protection actuator is constituted as shown in Figure 1 including a resetting piece 8, a lock buckle 7, a jump buckle 5 and an executing piece 6 connected in sequence, the jump buckle 5 is connected with a handle 3 in the middle, the handle 3 is externally connected with a resetting piece spring 13, and one side of the resetting piece spring 13 is in close contact with the resetting piece 8.

[0030] The base is further provided with the handle 3, the reset member 8, the lock catch 7 and the execution member 6 which are respectively rotatably connected to the base 2, and the handle 3, the execution member 6 and the lock catch 7 are externally connected with driving members.

[0031] The handle spring 9 is arranged between the handle 3 and the base 2, and provides the handle 3 with a pre-tightening force in the counterclockwise direction (the rotating direction in the embodiment, and the view direction is used as the reference direction), the execution member spring 10 is arranged between the execution member 6 and the base 2, and provides the execution member 6 with a pre-tightening force in the clockwise direction, and the lock catch spring 11 is arranged between the lock catch 7 and the base 2, and provides the lock catch 7 with a pre-tightening force in the clockwise direction. Figure 4

[0032] The linkage rod 601 is arranged on the execution member 6 and is eccentric to the mounting shaft of the execution member 6, and the jump catch 5 is rotatably connected to the linkage rod 601 at one end, and the jump catch spring 12 which cooperates with the base 2 is arranged on the jump catch 5.

[0033] The handle 3 is connected to the jump catch 5 through the connecting rod 4, and the connecting rod 4 and the jump catch 5 are left with a gap at the connection position, and the connection position of the connecting rod 4 and the jump catch 5 is located on the side away from the rotating shaft center of the execution member 6.

[0034] The push plate 801 is arranged on the reset member 8, and the transmission plate 701 is arranged on the lock catch 7, and the push plate 801 and the transmission plate 701 are mutually attached.

[0035] The pressing block 301 which cooperates with the reset member spring 13 is arranged on the handle 3.

[0036] The step groove 702 is arranged on one side of the lock catch 7, and the buckling block 501 is arranged on the end of the jump catch 5 away from the execution member 6, and the buckling block 501 and the step groove 702 are mutually buckled.

[0037] The connecting shaft which is rotatably connected to the base 2 is arranged in the middle of the lock catch 7, and the end of the connecting shaft extends to the outside through the reset member 8, and the limiting groove 802 which cooperates with the connecting shaft is arranged on the reset member 8.

[0038] The arc-shaped hole which cooperates with the tripping member is arranged on one side of the base 2, and the tripping member extends to the side of the execution member 6 through the arc-shaped hole.

[0039] ​The spliced ​​circuit breaker using the leakage protection actuator includes a cover 14, a bus 15 is provided inside the cover 14, a multi-pole circuit breaker 16 is connected to one side of the bus 15, and a magnetic ring assembly 1 and a leakage protection actuator are connected to each other on the other side of the bus 15. The ejection end of the magnetic ring assembly 1 is located at the bottom upper end of the reset member 8. The magnetic ring assembly 1 can use a conventional electronic release or an electromagnetic release; the tripping part of the multi-pole circuit breaker 16 extends into the leakage protection actuator, and the multi-pole circuit breaker 16 is a conventional circuit breaker with a tripping mechanism.

[0040] The present invention's operating principle: The leakage protection actuator is connected to the magnetic ring assembly 1 and then mounted on the housing 14 on one side of a multi-pole circuit breaker 16. The multi-pole circuit breaker 16 is then spliced ​​to the housing 14 via a busbar 15, thereby electrically connecting the leakage protection actuator and the multi-pole circuit breaker 16. Simultaneously, a tripping member in the multi-pole circuit breaker 16 extends through the base 2 into an arc-shaped hole on one side of the actuator 6. This allows the actuator 6 to rotate clockwise, driving the tripping member to actuate and disconnect the circuit breaker.

[0041] When leakage occurs in the external circuit, the magnetic ring assembly 1 moves toward the reset member 8 ( Figure 4 The handle 3 is pushed out vertically downward (in the direction of the middle arrow), causing the reset member 8 to rotate counterclockwise under the pushing effect; since the handle 3 is in the closed position at this time, the pressure block 301 can press the reset member spring 13 and the reset member 8 to be in a separated state, thereby not hindering the rotation of the reset member 8. After the reset member 8 rotates, the push plate 801 at the upper end drives the lock 7 to move counterclockwise through the transmission plate 701, causing the step groove 702 to disengage from the engagement state with the snap block 501 and separate from each other. After the snap block 501 is tripped, the limit in the clockwise direction is lost, causing the tripping buckle 5 to release the limit on the actuator 6, so that the elastic force generated by the actuator spring 10 can directly drive the actuator 6 to move clockwise and drive the tripping member to operate, thereby realizing the disconnection of the circuit breaker.

[0042] After the circuit breaker is disconnected, the handle 3 is moved counterclockwise under the action of the handle spring 9 to complete the tripping action, thereby driving the connecting rod 4 to first tilt downward and push the jump buckle 5 towards the actuator 6, so that the jump buckle 5 is rotated to the position with the actuator 6, and then the jump buckle 5 is pulled back in the subsequent rotation process, so that the jump buckle 5 is moved upward and downward, when the jump buckle 5 is moved to the top position away from the buckling block 501, the jump buckle spring 12 can be in close contact with the base 2 and limit one end of the jump buckle 5, so that the jump buckle 5 can be moved counterclockwise under the action of the pullback at one end of the buckling block 501, so that the buckling block 501 can be squeezed to open the lock 7 and re-enter the stepped groove 702 under the action of the elastic force, and the lock 7 is squeezed to open, and then the lock spring 11 is reset to rebound, so that the stepped groove 702 and the buckling block 501 are in the buckling state again. At the same time, when the handle 3 rotates counterclockwise, the pressing block 301 will be released from the pressing of the reset part spring 13, so that the reset part spring 13 can contact the reset part 8 after rebounding and drive the reset part 8 to rotate clockwise, so that the bottom of the reset part 8 can push the magnetic ring assembly 1 back to the reset position after clockwise rotation, thereby resetting the magnetic ring assembly 1. Through the above steps, the invention can respectively realize the pushing open of the tripping device and the external reset of the tripping device, so that the magnetic ring assembly 1 of the invention can be applied to the electromagnetic tripping device, thereby effectively reducing the size and cost of the leakage protection execution mechanism.

[0043] When the circuit breaker is manually closed and reset, the handle 3 is moved clockwise under the action of external driving, thereby driving the connecting rod 4 to tilt downward and push the jump buckle 5 towards the actuator 6. After the jump buckle 5 is pushed, the buckling block 501 at one end cannot move due to the buckling limitation of the stepped groove 702, so that the rotating connection end of the jump buckle 5 moves downward along the counterclockwise rotation direction of the actuator 6, thereby driving the actuator 6 to rotate counterclockwise, so that the actuator 6 is reset and the actuator spring 10 is reset to the pre-tightening state. After the handle 3 is rotated to the closed position, the pressing block 301 re-presses the reset part spring 13 to separate from the reset part 8 and leave a gap, so that the reset part 8 is restored to the free swing state, thereby achieving the reset effect.

Claims

1. Spliced ​​circuit breaker, characterized by: The invention comprises a housing (14), wherein a busbar (15) is provided in the housing (14), one side of the busbar (15) is connected to a multi-pole circuit breaker (16), and the other side of the busbar (15) is provided with a magnetic ring assembly (1) and a leakage protection actuator that are connected to each other; the tripping member of the multi-pole circuit breaker (16) extends into the leakage protection actuator; The leakage protection actuator comprises a reset member (8), a lock catch (7), a trip catch (5) and an actuator (6) connected in sequence, wherein the middle of the trip catch (5) is connected to a handle (3), the outside of the handle (3) is connected to a reset member spring (13), and one side of the reset member spring (13) is in contact with the reset member (8); It also includes a base, the handle (3), the reset member (8), the lock (7) and the actuator (6) are respectively rotatably connected to the base (2), and the handle (3), the actuator (6) and the lock (7) are externally connected to a driving member; A handle spring (9) is provided between the handle (3) and the base (2), an actuator spring (10) is provided between the actuator (6) and the base (2), and a lock spring (11) is provided between the lock (7) and the base (2); The actuator (6) is provided with a linkage rod (601), one end of the jump button (5) is rotatably connected to the linkage rod (601), and the jump button (5) is provided with a jump button spring (12); The handle (3) is connected to the jump button (5) via the connecting rod (4), and the connection between the connecting rod (4) and the jump button (5) is located on the side of the rotation axis of the actuator (6) away from the linkage rod (601); The reset member (8) is provided with a push plate (801), and the lock buckle (7) is provided with a transmission plate (701), and the push plate (801) and the transmission plate (701) are in contact with each other; The handle (3) is provided with a pressing block (301) that cooperates with the reset member spring (13); A step groove (702) is provided on one side of the lock buckle (7), and a buckle block (501) is provided on the end of the jump buckle (5) away from the actuator (6), and the buckle block (501) and the step groove (702) are buckled with each other; A connecting shaft is provided in the middle of the lock buckle (7), an end of the connecting shaft passes through the reset member (8) and extends to the outside, and a limiting groove (802) is provided on the reset member (8) to cooperate with the connecting shaft; The ejection end of the magnetic ring assembly (1) is located at the bottom upper end of the reset member (8); After the circuit breaker is disconnected, the handle (3) moves counterclockwise under the action of the handle spring (9) to complete the tripping action, thereby driving the connecting rod (4) to first push the trip buckle (5) downward in the direction of the actuator (6), so that the trip buckle (5) rotates into place along with the actuator (6), and then pulls back the trip buckle (5) in the subsequent rotation process, so that the trip buckle (5) moves upward in an inclined manner. When the trip buckle (5) moves to the top position at the end away from the buckle block (501), the trip buckle spring (12) can fit with the base (2) and limit one end of the trip buckle (5), so that the trip buckle (5) can be pulled back at the end of the buckle block (501) to move counterclockwise, thereby making the buckle block (501) ) can squeeze open the lock buckle (7) under the action of the rebound force and re-enter the step groove (702). After the lock buckle (7) is squeezed open, it rebounds under the reset action of the lock buckle spring (11), so that the step groove (702) and the buckling block (501) are in the buckled state again; at the same time, since the handle (3) rotates counterclockwise, the pressing block (301) will release the pressure on the reset spring (13) as it rotates, so that the reset spring (13) can contact the reset member (8) after rebounding and drive the reset member (8) to move clockwise, so that the bottom of the reset member (8) can push the pushed-out part of the magnetic ring assembly (1) back after rotating clockwise, thereby realizing the reset of the magnetic ring assembly (1); When the circuit breaker is manually closed and reset, the handle (3) is driven by the outside to move clockwise, thereby driving the connecting rod (4) to push the trip button (5) obliquely downward toward the actuator (6); after the trip button (5) is pushed, the locking block (501) at one end is locked and limited by the step groove (702) and cannot move, so that the rotating connection end of the trip button (5) moves obliquely downward along the counterclockwise rotation direction of the actuator (6), thereby driving the actuator (6) to rotate counterclockwise, so that the actuator (6) is reset and the actuator spring (10) is changed to the pre-tightened state again; after the handle (3) is rotated to the closed position, the pressure block (301) presses the reset spring (13) again until it is separated from the reset member (8) and a gap is left, so that the reset member (8) is restored to the free swing state, thereby achieving the reset effect.

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