Interlocking device of circuit breaker

Abstract

The invention relates to the technical field of interlocking devices, and discloses an interlocking device of a circuit breaker, which comprises a threaded directional driving structure, a threaded rod rotating along with a rotor of a driving motor, and a horizontal moving plate generating directional movement under the cooperation of a threaded structure in the threaded rod, the telescopic driven structure comprises a roller and a spiral spring; the roller is propped against and driven by a flashboard of the air switch circuit breaker in the horizontal moving process; and the spiral spring has a downward timely resetting function on the roller. According to the interlocking device of the circuit breaker, the driving motor is used as a power driving source, and the driven property of the thread structure is matched, so that the gate plate of the air switch circuit breaker can be opened or closed, and the potential safety hazard of a high-voltage arc to a worker is reduced; according to the device, the tripping phenomenon of the air switch circuit breaker in an emergency cannot be influenced on the basis of opening or opening the gate plate of the air switch circuit breaker, so that the normal work of the air switch circuit breaker cannot be hindered.

Description

Technical Field

[0001] The invention relates to the technical field of interlocking devices, in particular to an interlocking device for a circuit breaker. Background Art

[0002] Air switch is a kind of device that disconnects the power supply. Air switch, also known as air circuit breaker, is a kind of circuit breaker. It is a switch that will automatically disconnect as long as the current in the circuit exceeds the rated current. Air switch is a very important electrical appliance in low-voltage power distribution network and electric traction system. It integrates control and multiple protection functions. In addition to completing contact and disconnection of circuits, it can also protect circuits or electrical equipment from short circuits, severe overloads and undervoltages, and can also be used to start motors infrequently.

[0003] During operation, 1. When the power supply voltage exceeds the rated working voltage limit, the air circuit breaker will operate to disconnect the coil and main contacts of the contactor, thereby playing a protective role; 2. When the power supply voltage is lower than the rated working voltage limit, the air switch will close to connect the coil and auxiliary contacts of the contactor to play a switching role; 3. During normal operation, if there is a short circuit or overload, the main circuit power supply can be automatically cut off to protect the safe operation of equipment and lines. When closing or opening the air circuit breaker, it is necessary to manually move the gate of the air circuit breaker. When closing the air circuit breaker in the high-voltage circuit, there will be huge safety hazards due to the presence of high-voltage arcs. Summary of the invention

[0004] (I) Technical problems solved In view of the deficiencies in the prior art, the present invention provides an interlocking device for a circuit breaker, which utilizes a driving motor as a power source and cooperates with the follower nature of a threaded structure to open or disconnect the gate of an air-break circuit breaker, thereby reducing the potential safety hazard to workers due to high-voltage arcs. In addition, the device can open or disconnect the gate of an air-break circuit breaker without affecting the tripping of the air-break circuit breaker in an emergency, thereby not hindering the normal operation of the air-break circuit breaker, thereby solving the above-mentioned technical problems.

[0005] (II) Technical solution In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a circuit breaker interlocking device, comprising a rectangular frame, a slot arranged on the bottom surface of the rectangular frame and used to be clamped on the front end surface of the circuit breaker, a main threaded hole arranged around the rectangular frame and used to fix the rectangular frame and the circuit breaker by bolts, a component movable groove arranged in the slot and connected to the upper surface of the rectangular frame, a vertical plate structure arranged at both ends of the upper surface of the rectangular frame along the length direction of the rectangular frame, a component mounting hole arranged in the middle of the two vertical plate structures, and a driving motor horizontally mounted on the plate surface of one of the vertical plate structures, and also comprising a threaded directional driving structure, which is installed between the opposite end surfaces of the two vertical plate structures, and a threaded rod rotating with the rotor of the driving motor and a horizontal moving plate that produces directional movement under the cooperation of the threaded structure in the threaded rod are arranged inside; and a telescopic driven structure, which is fixedly installed on the upper end surface of the horizontal moving plate, and a stick is arranged inside which is used to resist and drive the gate of the open circuit breaker during the horizontal movement, and a spiral spring that produces a downward timely reset function for the stick.

[0006] Preferably, the structural dimensions of the rectangular frame at the slot position are larger than those at the component movable slot position, and the structural dimensions of the rectangular frame at the slot position are consistent with the edge dimensions of the front end surface of the circuit breaker.

[0007] Preferably, the threaded directional drive structure includes a horizontally movable plate, a threaded rod and a limiting sliding rod, the center and both sides of the horizontally movable plate are respectively provided with an integrated threaded sleeve structure and a limiting sliding sleeve, the middle part of the plate body of the horizontally movable plate is provided with a component through hole, both ends of the threaded rod are respectively installed with mounting shafts through couplings, each mounting shaft is respectively installed in the interior of a component mounting hole through a bearing, and an end of one of the mounting shafts is connected to the rotor end of the driving motor, a secondary threaded hole installed on the threaded rod body through a threaded structure is provided in the center of the threaded sleeve structure, and a limiting sliding hole sleeved on the limiting sliding rod body is provided in the center of the limiting sliding sleeve.

[0008] Preferably, the thread structure includes an internal thread structure provided in the secondary thread hole and an external thread structure provided on the threaded rod body, and the internal thread structure matches the external thread structure.

[0009] Preferably, the axis center line of the threaded rod and the axis center line of the limiting sliding rod are respectively on the same horizontal plane.

[0010] Preferably, the telescopic driven structure includes two longitudinal hollow shells and a stick, the bottom end of each of the longitudinal hollow shells is provided with an annular fixed plate structure fixedly mounted on the upper end surface of the horizontal movable plate, a longitudinal movable cavity is provided inside each of the longitudinal hollow shells, a movable plate movable along its longitudinal direction is respectively placed inside each of the longitudinal movable cavities, a coil spring for exerting downward pressure thereon is placed on the upper end surface of each movable plate, a telescopic resistance rod is installed at the bottom end of each movable plate which moves with the movable plate and passes through the bottom end structure of the longitudinal hollow shell and the through hole of the component, a limiting ring of an integrated structure is provided at the bottom end of each telescopic resistance rod, a rotating shaft is installed at the two rotating ends of the stick, and the shaft bodies of the two rotating shafts are respectively installed in the ring holes of the two limiting rings through bearings.

[0011] Preferably, the structural radius of the outer circumferential surface of the stick is larger than the structural radius of the outer ring of the limiting ring.

[0012] Preferably, when the stick is at the lowest point, the horizontal height of the bottom of the stick is lower than the horizontal height of the end of the gate of the air circuit breaker when the gate is in the open and closed states.

[0013] Preferably, when the stick is at the highest point, the horizontal height of the bottom of the stick is higher than the horizontal height of the end of the gate of the air circuit breaker when the gate is in a state perpendicular to the circuit breaker.

[0014] Compared with the prior art, the present invention provides an interlocking device for a circuit breaker, which has the following beneficial effects: The interlocking device of the circuit breaker utilizes a driving motor as a power source, and cooperates with the follower property of the threaded structure, so that the gate of the air-break circuit breaker can be opened or disconnected to reduce the potential safety hazard to workers due to high-voltage arcs. In addition, the device can open or disconnect the gate of the air-break circuit breaker without affecting the tripping of the air-break circuit breaker in an emergency, thereby not hindering the normal operation of the air-break circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereogram of the present invention at a first viewing angle; Figure 2 It is a stereogram of the present invention at a second viewing angle; Figure 3 is a three-dimensional cross-sectional view of a rectangular frame in the present invention; Figure 4 It is a three-dimensional diagram of the threaded directional drive structure of the present invention; Figure 5 It is a three-dimensional diagram of the telescopic driven structure of the present invention; Figure 6 It is a three-dimensional cross-sectional view of the telescopic driven structure in the present invention.

[0016] Among them: 1. rectangular frame; 2. slot; 3. main threaded hole; 4. component movable slot; 5. driving motor; 6. threaded directional driving structure; 61. horizontal moving plate; 62. threaded sleeve structure; 63. secondary threaded hole; 64. limiting sliding sleeve; 65. limiting sliding hole; 66. component through hole; 67. threaded rod; 68. limiting sliding rod; 69. mounting shaft; 7. telescopic driven structure; 71. longitudinal hollow shell; 72. annular fixed plate structure; 73. longitudinal movable cavity; 74. movable plate; 75. spiral spring; 76. telescopic resistance rod; 77. limiting collar; 78. stick; 79. rotating shaft; 8. vertical plate structure; 9. component mounting hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , Figure 2 and Figure 3 A circuit breaker interlocking device comprises a rectangular frame 1, a card slot 2 arranged on the bottom surface of the rectangular frame 1 and used to be clamped on the front surface of the circuit breaker, a main threaded hole 3 arranged around the rectangular frame 1 and used to fix the rectangular frame 1 and the circuit breaker by bolts, and a component movable groove 4 arranged in the card slot 2 and connected to the upper surface of the rectangular frame 1. Of course, in order to maintain the stability between the components after fixing, it is necessary to make the structural dimensions of the rectangular frame 1 at the card slot 2 larger than the structural dimensions of the rectangular frame 1 at the component movable groove 4, and the structural dimensions of the rectangular frame 1 at the card slot 2 are larger than the structural dimensions of the rectangular frame 1 at the component movable groove 4. The size of the vertical plate structures 8 is consistent with the edge size of the front end face of the air circuit breaker, and the vertical plate structures 8 are arranged at both ends of the upper surface of the rectangular frame 1 along the length direction of the rectangular frame 1, the component mounting holes 9 are arranged in the middle of the two vertical plate structures 8, and the driving motor 5 is horizontally installed on the surface of one of the vertical plate structures 8. When working, the card slot 2 is clamped at the front end of the air circuit breaker, that is, the end face of the air circuit breaker with the gate, and then the bolts are screwed into each main threaded hole 3, and the end of the bolt produces a resistance-type positioning effect on the side of the air circuit breaker, thereby realizing the stable connection function between the equipment and the air circuit breaker.

[0019] In order to realize the horizontal drive function of the gate of the circuit breaker, so as to have the function of opening or closing the gate, please refer to Figure 1 , Figure 2 and Figure 4, it is necessary to set up a threaded directional drive structure 6, which is installed between the opposite end faces of the two vertical plate structures 8. A threaded rod 67 that rotates with the rotor of the driving motor 8 and a horizontal movable plate 61 that produces directional movement under the cooperation of the threaded structure in the threaded rod 67 are arranged inside. When the driving motor 8 is started, its rotation will drive the threaded rod 67 to rotate, and due to the action of the threaded structure, the horizontal movable plate 61 will produce directional movement. At this time, by controlling the rotation direction of the rotor of the driving motor 8, the movement direction of the horizontal movable plate 61 can be controlled, so that the driving motor is used as the power driving source, and combined with the passive nature of the threaded structure, the gate of the air-opening circuit breaker can be opened or opened, so as to reduce the safety hazard to the staff due to the high-voltage arc.

[0020] For the specific structure of the threaded directional drive structure 6, please refer to Figure 4 , including a horizontal moving plate 61, a threaded rod 67 and a limiting slide rod 68. In order to ensure the stability of the component during movement and the feasibility of operation, it is necessary to make the axis center line of the threaded rod 67 and the axis center line of the limiting slide rod 68 respectively on the same horizontal plane. The center and both sides of the horizontal moving plate 61 are respectively provided with an integrated threaded sleeve structure 62 and a limiting slide sleeve 64. The middle part of the plate body of the horizontal moving plate 61 is provided with a component through hole 66. Both ends of the threaded rod 67 are respectively installed with mounting shafts 69 through couplings. Each mounting shaft 69 is respectively installed in a component mounting hole 9 through a bearing, and one end of the mounting shaft 69 is connected to the rotor end of the driving motor 5. The threaded sleeve structure 62 is connected to the threaded rod 67 by a threaded structure, and the center of the threaded sleeve structure 62 is provided with a secondary threaded hole 63 installed on the rod body of the threaded rod 67 through a threaded structure. The threaded structure includes an internal threaded structure arranged in the secondary threaded hole 63 and an external threaded structure arranged on the rod body of the threaded rod 67, and the internal threaded structure matches the external threaded structure. The center of the limiting sleeve 64 is provided with a limiting slide hole 65 sleeved on the rod body of the limiting slide rod 68. When the driving motor 8 is started, its rotation will drive the threaded rod 67 to rotate, and the cooperation of the limiting sleeve 64 and the limiting slide rod 68, combined with the effect of the threaded structure, will cause the horizontal moving plate 61 to produce directional movement, thereby converting the rotational motion of the rotor of the driving motor 8 into linear motion.

[0021] In order to realize the contact drive function of the gate of the air circuit breaker, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6, it is necessary to set a telescopic driven structure 7, which is fixedly installed on the upper end surface of the horizontal moving plate 61, and is provided with a stick 78 for resisting and driving the gate of the air-open circuit breaker during the horizontal movement, and a coil spring 75 for causing the stick 78 to reset downward in time. When the horizontal moving plate 61 moves, it will drive the stick 78 to move. During the movement, the stick 78 will contact a side structure of the gate of the air-open circuit breaker. At this time, since the gate is a rotating design, the stick 78 can form a resisting driving phenomenon on the contact surface of the gate, so that the gate is Rotate, during the movement process, until the gate plate is moved to the other side and inclined upward, at this time, the circumferential side of the stick 78 will contact the upward inclined surface, and form a force with the inclined surface. The longitudinal component of the force will cause the stick 78 to move upward, accompanied by the compression of the spiral spring 75, so that the stick 78 can be separated from the gate plate after completing the movement of the gate plate, and move to the vicinity of the other side of the gate plate, so as not to affect the automatic tripping of the gate plate of the air-break circuit breaker in an emergency, and thus will not hinder the normal operation of the air-break circuit breaker.

[0022] For the specific structure of the telescopic driven structure 7, please refer to Figure 5 and Figure 6 , including two longitudinal hollow shells 71 and a stick 78, each of the longitudinal hollow shells 71 is provided with an annular fixed plate structure 72 fixedly mounted on the upper end surface of the horizontal moving plate 61 at the bottom end, each of the longitudinal hollow shells 71 is provided with a longitudinal movable cavity 73 inside, each of the longitudinal movable cavities 73 is respectively provided with a movable plate 74 movable along its longitudinal direction, each movable plate 74 is provided with a spiral spring 75 exerting downward pressure on the upper end surface thereof, each movable plate 74 is provided with a telescopic abutment rod 76 which moves with the movable plate 74 and passes through the bottom end structure of the longitudinal hollow shell 71 and the component through hole 66 at the bottom end thereof, The bottom end of each telescopic abutment rod 76 is provided with an integrated limit collar 77, and the two rotating ends of the stick 78 are each installed with a rotating shaft 79. In order to ensure that the stick 78 is in timely contact with the gate plate and prevent the surrounding components from causing running obstacles, it is necessary to make the structural radius of the outer circumferential surface of the stick 78 larger than the structural radius of the outer ring of the limit collar 77. The shafts of the two rotating shafts 79 are respectively installed in the ring holes of the two limit collars 77 through bearings. During the contact process between the stick 78 and the gate plate, the stick 78 has a rotation function, thereby reducing the friction strength between the two on the contact surface to increase the service life of the components.

[0023] In order to ensure that the stick 78 has sufficient contact surface with the gate during the closing or opening process, and at the same time, the stick 78 can have the function of detaching from the gate, it is necessary to make the horizontal height of the bottom of the stick 78 lower than the horizontal height of the gate end of the air circuit breaker when the gate is in the open and closed states when the stick 78 is at the lowest point, and the horizontal height of the bottom of the stick 78 higher than the horizontal height of the gate end of the air circuit breaker when the gate is perpendicular to the circuit breaker when the stick 78 is at the highest point.

[0024] Of course, in order to ensure a sufficient safety distance, the current input controller connected to the power input terminal of the drive motor 8 can be kept away from the drive motor 8. The connection between the two can be achieved through radio technology or by increasing the length of the wire.

[0025] Note: The interlocking device of the circuit breaker can only be used for air-open circuit breakers whose gate plate rotates around the center line. Therefore, it cannot be used for air-open circuit breakers whose gate plate does not rotate around the center line.

[0026] When in use, the card slot 2 is stuck at the front end of the air circuit breaker, that is, the end face of the air circuit breaker with the gate plate, and then the bolts are screwed into each main threaded hole 3, and the end of the bolt produces a resistance-type positioning effect on the side of the air circuit breaker. When it is necessary to close or open the circuit, the rotation direction of the rotor of the drive motor 8 is controlled, which will drive the threaded rod 67 to rotate, and the cooperation of the limiting sliding sleeve 64 and the limiting sliding rod 68, combined with the effect of the threaded structure, will cause the horizontal moving plate 61 to produce a directional movement, thereby converting the rotational motion of the rotor of the drive motor 8 into a linear motion. When the horizontal moving plate 61 moves, it will drive the stick 78 to move. During the movement, the stick The rod 78 will contact the side structure of the gate plate of the air-open circuit breaker. At this time, since the gate plate is a rotating design, the rod 78 can form a resistance driving phenomenon on the contact surface of the gate plate, thereby causing the gate plate to be rotated. During the movement, until the gate plate is moved to the other side and inclined upward, the circumferential side of the rod 78 will contact the upward inclined surface and form a force with the inclined surface. The longitudinal component of the force will cause the rod 78 to move upward, accompanied by the compression of the coil spring 75, so that the rod 78 can be separated from the gate plate after completing the movement of the gate plate, and move to the vicinity of the other side of the gate plate to complete the closing or opening of the gate plate.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker interlocking device, comprising a rectangular frame (1), a slot (2) arranged on the bottom surface of the rectangular frame (1) and used to be clamped on the front end surface of the circuit breaker, a main threaded hole (3) arranged around the rectangular frame (1) and used to fix the rectangular frame (1) and the circuit breaker by bolts, a component movable groove (4) arranged in the slot (2) and connected to the upper surface of the rectangular frame (1), a vertical plate structure (8) arranged at both ends of the upper surface of the rectangular frame (1) along the length direction of the rectangular frame (1), a component mounting hole (9) arranged in the middle of the two vertical plate structures (8), and a driving motor (5) horizontally mounted on the plate surface of one of the vertical plate structures (8), characterized in that: Also includes A threaded directional drive structure (6) is installed between the opposite end surfaces of the two vertical plate structures (8), and is provided with a threaded rod (67) rotating with the rotor of the drive motor (8) and a horizontal moving plate (61) that moves in a directional manner in cooperation with the threaded structure in the threaded rod (67); and a telescopic driven structure (7) fixedly mounted on the upper end surface of the horizontal moving plate (61), wherein a rod (78) is provided inside the structure for resisting and driving the gate plate of the air-opening circuit breaker during the horizontal movement, and a coil spring (75) for causing the rod (78) to reset downward in time.

2. The interlocking device of a circuit breaker according to claim 1, characterized in that: The structural dimensions of the rectangular frame (1) at the position of the clamping slot (2) are correspondingly larger than the structural dimensions of the rectangular frame (1) at the position of the component movable slot (4), and the structural dimensions of the rectangular frame (1) at the position of the clamping slot (2) are correspondingly consistent with the edge dimensions of the front end face of the air switch circuit breaker.

3. The interlocking device of a circuit breaker according to claim 1, characterized in that: The threaded directional drive structure (6) comprises a horizontal moving plate (61), a threaded rod (67) and a limiting sliding rod (68); the center and both sides of the horizontal moving plate (61) are respectively provided with a threaded sleeve structure (62) and a limiting sliding sleeve (64) of an integrated structure; a component through hole (66) is provided in the middle of the plate body of the horizontal moving plate (61); both ends of the threaded rod (67) are respectively provided with mounting shafts (69) through couplings; each mounting shaft (69) is respectively installed inside a component mounting hole (9) through a bearing, and the end of one of the mounting shafts (69) is butted against the rotor end of the driving motor (5); the center of the threaded sleeve structure (62) is provided with a secondary threaded hole (63) installed on the rod body of the threaded rod (67) through a threaded structure; the center of the limiting sliding sleeve (64) is provided with a limiting sliding hole (65) sleeved on the rod body of the limiting sliding rod (68).

4. The interlocking device of a circuit breaker according to claim 3, characterized in that: The thread structure comprises an internal thread structure provided in the secondary thread hole (63) and an external thread structure provided on the rod body of the threaded rod (67), and the internal thread structure matches the external thread structure.

5. The interlocking device of a circuit breaker according to claim 3, characterized in that: The axis center line of the threaded rod (67) and the axis center line of the limiting sliding rod (68) are respectively on the same horizontal plane.

6. The interlocking device of a circuit breaker according to claim 3, characterized in that: The telescopic driven structure (7) comprises two longitudinal hollow shells (71) and a stick (78), the bottom end of each longitudinal hollow shell (71) is provided with an annular fixed plate structure (72) fixedly mounted on the upper end surface of the horizontal movable plate (61), each longitudinal hollow shell (71) is provided with a longitudinal movable cavity (73) inside, each longitudinal movable cavity (73) is provided with a movable plate (74) movable along its longitudinal direction, and the upper end surface of each movable plate (74) is provided with a A coil spring (75) for providing pressure, a telescopic abutment rod (76) is installed at the bottom end of each movable plate (74) and moves with the movable plate (74) and passes through the bottom end structure of the longitudinal hollow shell (71) and the component through hole (66), and a limiting collar (77) of an integrated structure is provided at the bottom end of each telescopic abutment rod (76), and a rotating shaft (79) is installed at the two rotating ends of the stick (78), and the shaft bodies of the two rotating shafts (79) are respectively installed in the ring holes of the two limiting collars (77) through bearings.

7. The interlocking device of a circuit breaker according to claim 6, characterized in that: The structural radius of the outer circumferential surface of the stick (78) is greater than the structural radius of the outer ring of the limiting collar (77).

8. The interlocking device of a circuit breaker according to claim 6, characterized in that: When the stick (78) is at the lowest point, the horizontal height of its bottom is lower than the horizontal height of the end of the shutter of the air circuit breaker when the shutter is in the open and closed states.

9. The interlocking device of a circuit breaker according to claim 8, characterized in that: When the stick (78) is at the highest point, the horizontal height of its bottom is higher than the horizontal height of the end of the gate of the air circuit breaker when the gate is in a state of being vertical to the circuit breaker.

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