Rapid opening switch

Abstract

The utility model relates to a quick opening switch, which belongs to the technical field of power supply and distribution, and comprises an arc extinguish chamber, a main shaft transmission part and a spring operating mechanism, the spring operating mechanism comprises a transmission crank arm for triggering the action of the spring operating mechanism, and the closing and opening operation of a circuit breaker is realized through the transmission output of the main shaft transmission part; the rotating shaft rotates around the axis of the rotating shaft so as to abut against or release the transmission crank arm; the push plate is connected to the peripheral side surface of the rotating shaft, is provided with a stress part and drives the rotating shaft to rotate; an action part of the electromagnetic repulsion mechanism abuts against the stress part of the push plate so as to drive the rotating shaft to rotate. The spring operating mechanism is triggered to act through the electromagnetic repulsion mechanism, compared with traditional electromagnet driving, the rapid triggering effect can be achieved by utilizing the eddy current repulsion principle, the opening time is shortened, the triggering structure is simple and efficient, the action is accurate and rapid, and the reliability is high. And the spring operating mechanism circuit breaker can be applied to more occasions requiring rapid opening.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power supply and distribution, specifically relates to a quick switching switch. BACKGROUND

[0002] The circuit breaker is a kind of quick switching device, and is a kind of switching device that can be closed, carried and opened under the current of normal loop condition, and can be closed, carried and opened under the current of abnormal loop condition within a specified time.The circuit breaker can be used to distribute electric energy, infrequently start asynchronous motor, protect power supply line and motor, and automatically cut off the circuit when serious overload or short circuit and under-voltage fault occurs.The operating mechanism of the circuit breaker mainly has three types: electromagnetic mechanism, spring mechanism and permanent magnet mechanism, and their main functions are to carry out switching-off and switching-on operation according to standards to realize the breaking and closing of power circuit.

[0003] For the traditional spring mechanism circuit breaker, an electromagnet driving mechanism is generally used to trigger the spring groove mechanism to act.The specific switching-off operation process is as follows: after the switching-off trigger coil is magnetized, the switching-off release is rotated counterclockwise, the lock pin is lifted, the switching-off spring provides force, the crank arm is rotated clockwise around the output shaft, and the connecting rod drives the movable contact of the circuit breaker to move to the switching-off position.The switching-on operation process is as follows: after the switching-on trigger coil is magnetized, the switching-on trigger is rotated counterclockwise, the lock pin is released, the blocking effect on the pin is removed, the torque generated by the switching-on spring drives the large gear and cam to rotate clockwise around the cam shaft, the cam pushes the crank arm to rotate counterclockwise around the output shaft, and the connecting rod drives the movable contact of the circuit breaker to move to the switching-on position.The switching-on spring energy storage process involves that the energy storage motor makes the small gear rotate counterclockwise through the reduction gear and overrunning clutch, forces the large gear to rotate clockwise, lifts the pull rod to compress the switching-on spring, and makes the large gear stop at the working position through the pin and lock pin after passing through the dead point position, so that the energy of the switching-on spring is maintained.

[0004] In the utility model patent with application number 201721035161.X, the spring mechanism is triggered by the opening and closing electromagnet structure, and the action speed is slow and the time is long, which limits its use in certain occasions.Therefore, it is necessary to improve the rapidity of the spring operating mechanism circuit breaker and change the limitation of its use occasion. UTILITY MODEL CONTENTS

[0005] 1. Problem to be solved

[0006] For the spring operating mechanism circuit breaker in the prior art, the spring mechanism is triggered by the opening and closing electromagnet structure, and the action speed is slow and the time is long, so the electromagnetic repulsion mechanism is used to trigger the spring operating mechanism, compared with the traditional electromagnet driving, the effect of quick triggering can be achieved, and the opening and closing time is shortened.

[0007] 2、Technical solution

[0008] To solve the above problems, the utility model adopts the following technical scheme.

[0009] A kind of quick switching-off switch, comprising:

[0010] Arc extinguishing chamber, with arc extinguishing cavity, to accommodate movable contact and fixed contact, also with main shaft transmission component connected with movable contact, main shaft transmission component at least partially extends the arc extinguishing cavity;

[0011] Spring operating mechanism, including transmission crank that triggers self-action, and the closing and opening operation of circuit breaker is realized by the transmission output of main shaft transmission component;Further comprising:

[0012] Rotating shaft, rotates around its own axis to abut or release the transmission crank;

[0013] Push plate, connected on the circumferential surface of the rotating shaft, has stress part, drives the rotating shaft to rotate;

[0014] Electromagnetic repulsion mechanism, including mechanism housing, action component is arranged in mechanism housing, action component can move along the central axis direction of mechanism housing, with transmission part that at least partially extends mechanism housing, transmission part abuts the stress part of push plate to drive the rotating shaft to rotate.

[0015] Preferably, the push plate includes sequentially connected connecting part, turning part, stress part, and the connecting part is connected with the circumferential surface of the rotating shaft. Specifically, the stress part is bent relative to the connecting part and the turning part to the direction deviating from the axis of the rotating shaft, so as to drive the rotating shaft to rotate by the force of the transmission part.

[0016] Preferably, the circumferential surface of the rotating shaft has a planar notch in the axial direction, and the planar notch is fixedly connected with the connecting part.

[0017] Preferably, the main shaft transmission component includes a transmission main shaft reciprocating along the axis, one end of which is connected with the spring operating mechanism, and the other end is connected with an insulating pull rod, which controls the contact and separation of the movable contact and the fixed contact.

[0018] Further, the action component includes:

[0019] Drive disc, in the form of a disc structure, housed in the mechanism housing;

[0020] Movement rod, extending from the drive disc along the central axis of the mechanism housing, with its front end extending out of the mechanism housing to form a transmission part, abutting to the stress part of the push plate;

[0021] Drive assembly, driving the drive disc to move along the central axis of the mechanism housing, thereby driving the rotating shaft to rotate.

[0022] Preferably, the other end of the moving rod opposite to the transmission part extends out of the mechanism shell to form a reset part, and a reset spring is sleeved on the periphery of the reset part to drive the driving disc and the moving rod to reset.

[0023] Further, a capacitor for supplying power to the driving assembly and a thyristor for controlling discharge of the capacitor are further included, and a fast controller for triggering the thyristor is further included.

[0024] Further, a pole column for accommodating the arc extinguishing chamber and the main shaft transmission part is further included, and a lower contact arm is arranged on the pole column, and the Rogowski coil is sleeved on the lower contact arm.

[0025] 3. Advantageous effects

[0026] Compared with the prior art, the utility model has the beneficial effects that:

[0027] The quick opening and closing switch provided by the utility model is triggered by the electromagnetic repulsion mechanism to operate the spring operating mechanism, compared with the traditional electromagnetic drive, can utilize the eddy current repulsion principle to achieve the effect of quick triggering, shorten the opening and closing time, and the trigger structure is simple and efficient, accurate and quick in action, so that the spring operating mechanism circuit breaker can be applied to more occasions requiring quick opening and closing. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the quick switch in the embodiment;

[0029] Figure 2 It is a structure schematic view of the quick switch in the embodiment;

[0030] Figure 3 It is Figure 1 An enlarged view of structure at A in the embodiment.

[0031] In the figure:

[0032] 1, arc extinguishing chamber; 2, main shaft transmission part; 21, transmission main shaft; 22, insulating pull rod; 3, spring operating mechanism; 4, rotating shaft; 5, push plate; 51, connecting part; 52, turning part; 54, stress part; 6, electromagnetic repulsion mechanism; 61, mechanism shell; 62, action part; 621, driving disc; 622, moving rod; 623, driving assembly; 624, buffer pad; 625, reset part; 626, reset spring; 627, transmission part; 7, capacitor; 8, thyristor; 9, fast controller; 10, Rogowski coil. DETAILED DESCRIPTION

[0033] In order to make the technical means, creation characteristics, achieve purposes and effects of the utility model easy to understand, the utility model is further described below in combination with examples.

[0034] In practical application, the circuit breaker is divided into a fast circuit breaker and a common circuit breaker, the common circuit breaker is driven by a permanent magnet mechanism or a spring mechanism, the tripping action is relatively slow, and the fast circuit breaker is driven by an electromagnetic repulsion mechanism, the movement intensity of the fast circuit breaker is relatively large during opening and closing, long-time use can cause fatigue damage, and the service life of the whole device and the safety of the smart grid system are reduced.

[0035] In order to make the purposes, technical schemes and advantages of the utility model more clear, the utility model example provides a fast opening and closing switch, which can make movable contacts relative to fixed contacts switch between a closed position and an open position, as shown in Figure 1 and Figure 2 The fast opening and closing switch mainly comprises an arc extinguishing chamber 1, a spring operating mechanism 3 and an electromagnetic repulsion mechanism 6.

[0036] The arc extinguishing chamber 1 has an arc extinguishing cavity to accommodate movable contacts and fixed contacts, and has a main shaft transmission part 2 connected with the movable contacts, and the main shaft transmission part 2 at least partially extends out of the arc extinguishing cavity; in a possible example, the main shaft transmission part 2 comprises a transmission main shaft 21 reciprocatingly rotating along an axis, one end of the transmission main shaft 21 is connected with the spring operating mechanism 3, and the other end is connected with an insulating pull rod 22, and the insulating pull rod 22 controls the contact and separation of the movable contacts and the fixed contacts; specifically, the transmission main shaft 21 rotates and swings around the rotation center of the transmission main shaft 21 to form a lever structure, more specifically, the transmission main shaft 21 is rotatably fixed in the circuit breaker housing.

[0037] The spring operating mechanism 3 comprises a transmission crank arm triggering self action, and realizes the closing and opening operation of the circuit breaker through the transmission output of the main shaft transmission part 2; it should be noted that the spring operating mechanism 3 in the example can be any form of spring operating mechanism in the prior art, for example, the spring operating mechanism 3 in the utility model patent with the application number 201721035161.X, as long as the spring operating mechanism 3 is driven or triggered to move.

[0038] In order to make the circuit breaker close again after the circuit is restored to normal, the power supply of the circuit is restored, and the action of the spring operating mechanism 3 needs to be controlled through the tripping mechanism. Figure 3 As shown in the figure, in the example, a rotating shaft 4 abuts against the transmission crank arm in the spring operating mechanism 3, the rotating shaft 4 can rotate around the axis thereof to abut against or release the transmission crank arm. A push plate 5 is connected to the circumferential surface of the rotating shaft 4, and has a force receiving part 53, which drives the rotating shaft 4 to rotate after receiving the force. The push plate 5 and the rotating shaft 4 can be fixedly connected by integrally forming, welding or screw connection.

[0039] In order to quickly drive the push plate 5 to move, the electromagnetic repulsion mechanism 6 is adopted in the embodiment, which includes a mechanism shell 61, an action component 62 arranged in the mechanism shell 61, the action component 62 being movable along the central axis direction of the mechanism shell 61 and having a transmission part 627 extending out of the mechanism shell 61 at least partially, the transmission part 627 abutting against the stress part 53 of the push plate 5 to drive the rotating shaft 4 to rotate. In the embodiment, the electromagnetic repulsion mechanism 6 is adopted to drive the push plate 5 to move and the rotating shaft 4 to rotate, and the quick action of the electromagnetic repulsion mechanism 6 can quickly trigger the action of the spring operating mechanism 3 to realize quick opening, and the action component 62 of the electromagnetic repulsion mechanism 6 directly abuts against the push plate 5, which is simple and efficient in structure and can make the triggering action more accurate and quick, so that the spring operating mechanism 3 is applied to more occasions requiring quick opening.

[0040] In a possible embodiment, the push plate 5 includes a connecting part 51, a turning part 52 and a stress part 53 connected in sequence, the connecting part 51 being connected with the peripheral side of the rotating shaft 4, and the stress part 53 being bent in a direction deviating from the axis of the rotating shaft 4 relative to the connecting part 51 and the turning part 52 to be driven to rotate the rotating shaft 4 by the force of the transmission part 627. In this way, the action component 62 of the electromagnetic repulsion mechanism 6 applies a pushing force to the stress part 53 of the push plate 5, and the stress part 53 can drive the rotating shaft 4 to rotate clockwise or counterclockwise in the direction of the force through the connecting part 51, so as to release the transmission crank and trigger the action of the spring operating mechanism 3. In a possible embodiment, in order to facilitate the connection between the rotating shaft 4 and the push plate 5, a planar notch is arranged on the peripheral side of the rotating shaft 4 in the axial direction, and the planar notch is fixedly connected with the connecting part 51, thereby increasing the contact area between the rotating shaft 4 and the push plate 5 and making the connection between the rotating shaft 4 and the push plate 5 more reliable.

[0041] In another possible embodiment, the action component 62 of the electromagnetic repulsion mechanism 6 includes a driving disc 621 in a disc structure, which is accommodated in the mechanism shell 61, a movement rod 622 extending from the driving disc 621 along the central axis direction of the mechanism shell 61, the front end of the movement rod 622 extending out of the mechanism shell 61 to form the transmission part 627 abutting against the stress part 53 of the push plate 5, and a driving assembly 623 driving the driving disc 621 to move along the central axis direction of the mechanism shell 61 to drive the rotating shaft 4 to rotate. The driving disc 621 and the movement rod 622 can be integrally arranged or fixedly connected by welding, screw connection or the like.

[0042] In a possible embodiment, a tripping coil is arranged on one side of the driving disc 621 in the mechanism shell 61, and the tripping coil generates eddy current repulsion force when energized to drive the repulsion disc or the driving disc 621 and the moving rod 622 to move. In order to avoid the other side of the driving disc 621 from colliding with the mechanism shell 61 and causing damage, a buffer pad 624 is arranged on the other side of the driving disc 621. Specifically, a ring of protrusions is arranged on the side of the moving rod 622 close to the driving disc 621, and the protrusions cooperate with the second surface of the driving disc 621 to form a clamping structure, thereby clamping and fixing the buffer pad 624.

[0043] In order to realize the reset of the electromagnetic repulsion mechanism 6, a reset structure is also needed to drive the action component 62 to reset after the tripping coil is not energized. In a possible embodiment, the other end of the moving rod 622 opposite to the transmission part 627 extends out of the mechanism shell 61 to form a reset part 625, and a reset spring 626 is sleeved on the side of the reset part 625, for driving the driving disc 621 and the moving rod 622 to reset. That is, when the driving disc 621 and the moving rod 622 are driven to move by the tripping coil, the reset spring 626 is in a compressed energy storage state, and after the tripping coil is not energized, the reset spring 626 resets to drive the driving disc 621 and the moving rod 622 to reset. In a possible embodiment, a locking nut is arranged on the end of the moving rod 622, one end of the reset spring 626 is connected with the locking nut, and the other end is connected to the mechanism shell 61.

[0044] In another possible embodiment, a capacitor 7 for supplying power to the driving assembly 623 and a thyristor 8 for controlling the discharge of the capacitor 7 are further included, and a fast controller 9 for triggering the thyristor 8 is further included. A Rogowski coil 10 is further included, and the fast controller 9 judges the short-circuit current waveform and predicts the zero-crossing point through the Rogowski coil 10, to control the tripping. Further, a pole 11 accommodating the arc-extinguishing chamber 1 and the main shaft transmission part 2 is further included, and a lower contact arm 111 is arranged on the pole 11, and the Rogowski coil 10 is sleeved on the lower contact arm 111.

[0045] In the utility model, the spring operating mechanism 3 and the electromagnetic repulsion mechanism 6 are in the initial state, that is, when the circuit breaker is in the closing state, the rotating shaft 4 abuts against the transmission crank, so that the spring operating mechanism 3 cannot act. When the Rogowski coil 10 senses the short-circuit current, the fast controller 9 judges the short-circuit current waveform and predicts the zero-crossing point, sends a control signal to the thyristor 8, to control the capacitor 7 to supply power to the driving coil in the electromagnetic repulsion mechanism 6, the driving coil drives the driving disc 621 and the moving rod 622 to move, and then drives the push plate 5 to move, to drive the rotating shaft 4 to rotate, thereby releasing the transmission crank, triggering the spring operating mechanism 3 to act, and realizing the rapid tripping.

[0046] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements should fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A quick opening and closing switch, comprising: an arc extinguishing chamber (1) having an arc extinguishing cavity for accommodating a movable contact and a fixed contact, and a main shaft transmission component (2) connected to the movable contact; a spring operating mechanism (3) including a transmission crank arm for triggering self-action, and realizing closing and opening operations of the circuit breaker through transmission output to the main shaft transmission component (2); characterized in that further comprising: a rotating shaft (4) rotating around its own axis to abut or release the transmission crank arm; a push plate (5) connected to the circumferential surface of the rotating shaft (4) and having a force receiving portion (53) for driving the rotating shaft (4) to rotate; an electromagnetic repulsion mechanism (6) including a mechanism housing (61) and an action component (62) arranged in the mechanism housing (61) and movable along the central axis of the mechanism housing (61), the action component (62) having a transmission portion (627) extending out of the mechanism housing (61) and abutting the force receiving portion (53) of the push plate (5) to drive the rotating shaft (4) to rotate.

2. The quick opening switch of claim 1, wherein, The push plate (5) includes a connecting portion (51), a turning portion (52) and the force receiving portion (53) connected in sequence, and the connecting portion (51) is connected to the circumferential surface of the rotating shaft (4).

3. The quick opening switch of claim 2, wherein, The force receiving portion (53) is bent away from the axis of the rotating shaft (4) relative to the connecting portion (51) and the turning portion (52) to be driven to rotate by the transmission portion (627).

4. The quick opening switch of claim 2, wherein, The circumferential surface of the rotating shaft (4) has a planar notch (41) in the axial direction, and the planar notch (41) is fixedly connected to the connecting portion (51).

5. The quick opening switch of claim 1, wherein, The main shaft transmission component (2) includes a transmission main shaft (21) reciprocating around the axis, one end of which is connected to the spring operating mechanism (3) and the other end of which is connected to an insulating pull rod (22) for controlling the contact and separation of the movable contact and the fixed contact.

6. The fast opening switch of any one of claims 1-5, wherein, The action component (62) includes: a driving disc (621) in a disc structure accommodated in the mechanism housing (61); a movement rod (622) extending from the driving disc (621) along the central axis of the mechanism housing (61) and having a transmission portion (627) extending out of the mechanism housing (61) to abut the force receiving portion (53) of the push plate (5); a driving assembly (623) for driving the driving disc (621) to move along the central axis of the mechanism housing (61) to drive the rotating shaft (4) to rotate.

7. The quick opening switch of claim 6, wherein, The other end of the movement rod (622) opposite to the transmission portion (627) extends out of the mechanism housing (61) to form a reset portion (625), and a reset spring (626) is sleeved around the circumferential surface of the reset portion (625) for resetting the driving disc (621) and the movement rod (622).

8. The quick opening switch of claim 6, wherein, Further comprising a capacitor (7) for supplying power to the driving assembly (623), a thyristor (8) for controlling discharge of the capacitor (7), and a quick controller (9) for triggering the thyristor (8).

9. The quick opening switch of claim 8, wherein, The quick controller (9) judges the short-circuit current waveform and predicts the zero point through the Rogowski coil (10) to control the breaking.

10. The quick opening switch of claim 9, wherein, The pole column (11) containing the arc extinguishing chamber (1) and the main shaft transmission part (2) is provided with a lower contact arm (111), and the Rogowski coil (10) is sleeved on the lower contact arm (111).

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