Low-power-consumption opening assembly and double-opening circuit breaker mechanism

Abstract

The utility model discloses a low-power-consumption opening assembly and a double-opening circuit breaker mechanism, the double-opening circuit breaker mechanism is provided with an opening electromagnet and the low-power-consumption opening assembly, a mounting plate of the low-power-consumption opening assembly is provided with a low-power-consumption electromagnet, a rack and a gear, the rack and the gear are meshed with each other, the low-power-consumption electromagnet is arranged on one side of the rack, and the gear is arranged on the other side of the rack. An ejector rod of the low-power-consumption electromagnet faces the rack; when the low-power-consumption electromagnet is electrified, an ejector rod of the low-power-consumption electromagnet is ejected out to push the rack forwards, and the rack drives the gear to rotate forwards; when the gear rotates reversely, the rack is driven to move and return, and the ejector rod is ejected to return. According to the utility model, double opening stations are adopted, the opening electromagnet adopts an electromagnet with relatively high power and is suitable for a high-power occasion, the low-power-consumption opening assembly adopts a low-power-consumption electromagnet and is suitable for an occasion that tripping is carried out under passive protection induction current, and an appropriate station is selected to carry out opening according to an actual working occasion; and successful opening can be ensured in various working occasions.

Description

Technical Field

[0001] The utility model relates to the field of power grid distribution cabinets, in particular to a low-power tripping component and a double-tripping circuit breaker mechanism. Background Art

[0002] A ring main unit refers to electrical equipment in which power transmission and distribution electrical equipment (high-voltage switchgear) is installed in a metal or non-metal insulating cabinet or made into a prefabricated sectionalized ring main power supply unit. It is widely used in distribution substations and box-type substations at load centers such as urban residential quarters, high-rise buildings, large public buildings, and industrial enterprises. A disconnector and a circuit breaker mechanism are provided on the ring main unit. The circuit breaker mechanism can not only cut off and connect high-voltage lines and various no-load and load currents during normal system operation, but also automatically, quickly, and reliably cut off various overload currents and short-circuit currents through the action of a relay protection device when a system fault occurs, preventing the occurrence and expansion of the accident range.

[0003] For a conventional circuit breaker mechanism, the tripping rotating plate is usually directly driven by a tripping electromagnet, and then the circuit breaker mechanism is tripped. After tripping, the tripping electromagnet is reset by a return spring. This type of circuit breaker mechanism usually uses a DC regulated electromagnet, and a bistable low-power electromagnet is required in the case of using the induced current of passive protection. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the existing circuit breaker mechanism, the applicant provides a low-power tripping component and a double-tripping circuit breaker mechanism with a reasonable structure. A set of low-power tripping components is added to the circuit breaker mechanism. In the case of using the induced current of passive protection, the low-power tripping components are used for tripping to ensure successful tripping.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A low-power tripping component, a low-power electromagnet, a rack and a gear which are meshed with each other are arranged on a mounting plate. The low-power electromagnet is arranged on one side of the rack, and the ejector rod of the low-power electromagnet faces the rack. When the low-power electromagnet is energized, its ejector rod ejects, pushing the rack forward. The rack drives the gear to rotate forward. When the gear rotates in the reverse direction, it drives the rack to move back to its original position, pushing the ejector rod back to its original position.

[0007] As a further improvement of the above technical solution:

[0008] An interlocking arm extends from the gear.

[0009] The low-power electromagnet is placed in the installation cavity of the fixed shell, the fixed shell is fixed to the mounting plate, and the top rod of the low-power electromagnet extends from one side of the fixed shell; the fixed shell includes a bottom shell and an upper cover plate; the bottom shell is surrounded by enclosures, and the upper cover plate is a semi-cylindrical cover, and baffles are respectively provided on the front and rear sides of the arc-shaped cover plate, and the baffles correspond to the enclosures on the front and rear sides of the bottom shell.

[0010] The low-power electromagnet is fixed to the mounting plate by a fixing bracket, and a fixing plate is provided on one side of the low-power electromagnet; the fixing bracket is a V-shaped bracket, a U-shaped bracket, or an arc-shaped bracket.

[0011] The rack is connected to the mounting plate through the first support rod. The mounting hole on the rack connected to the first support rod is an oblong hole. The rack is movably matched with the first support rod through the mounting hole; the gear is connected to the mounting plate through the second support rod, and the gear can rotate around the central axis of the second support rod.

[0012] A double-trip circuit breaker mechanism has an output shaft and a trip half-shaft passing through the base plate, a trip turn plate sleeved on the trip half-shaft, a trip button correspondingly provided on one side of the trip turn plate, and the trip turn plate cooperates with the trip button; a trip electromagnet and a low-power trip component are provided on the base plate corresponding to the trip turn plate; when the circuit breaker is opened, the trip turn plate can be pushed to rotate by the trip electromagnet or the low-power trip component to unlock the trip button.

[0013] As a further improvement of the above technical solution:

[0014] A crank arm is sleeved on the output shaft and can rotate with the output shaft; the crank arm corresponds to the interlocking arm of the gear. When the crank arm rotates with the output shaft, it can move the interlocking arm of the gear and drive the gear to rotate in the opposite direction.

[0015] The tripping rotary plate includes a first rotating arm, a second rotating arm and a locking arm. The first rotating arm cooperates with the tripping electromagnet, the second rotating arm cooperates with the low-power tripping component, and the locking arm cooperates with the tripping button.

[0016] The low-power trip assembly is fixedly connected to the base plate through a mounting plate.

[0017] The tripping electromagnet adopts high-power electromagnet, and the low-power tripping component adopts low-power electromagnet.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model adopts double tripping positions. The tripping electromagnet adopts a high-power electromagnet, which is suitable for high-power occasions. The low-power tripping component adopts a low-power electromagnet, which is suitable for occasions where tripping is performed under passive protection induction current. The appropriate position is selected for tripping according to the actual working occasion to ensure successful tripping in various working occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view structural schematic diagram of the circuit breaker mechanism of the present utility model. At this time, the low-power tripping component pushes open the tripping rotating plate, and the output shaft has not tripped yet.

[0021] Figure 2 This is the front view structural schematic diagram of the circuit breaker mechanism of the present utility model. At this time, the output shaft trips, and the low-power tripping component resets.

[0022] Figure 3 This is the three-dimensional view of an embodiment of the low-power tripping component.

[0023] Figure 4 This is the three-dimensional exploded view of the fixed shell.

[0024] Figure 5 This is the three-dimensional view of another embodiment of the low-power tripping component.

[0025] Figure 6 For Figure 5 front view.

[0026] In the figure: 1, bottom plate; 2, output shaft; 3, tripping half shaft; 4, tripping rotating plate; 41, first rotating arm; 42, second rotating arm; 43, locking arm; 5, tripping button; 6, tripping electromagnet; 7, low-power tripping component; 71, mounting plate; 72, low-power electromagnet; 721, ejector rod; 73, rack; 731, mounting hole; 74, gear; 741, interlocking arm; 75, first support rod; 76, second support rod; 77, fixed bracket; 78, fixing plate; 79, fixed shell; 791, bottom shell; 792, upper cover plate; 8, crank arm. Specific embodiments

[0027] The following combines with the attached drawings to illustrate the specific embodiments of the present utility model.

[0028] Such as Figure 1 、 Figure 2As shown in the figure, an output shaft 2 and a tripping half shaft 3 are passed through a bottom plate 1 of the circuit breaker mechanism of the present utility model. A crank arm 8 is sleeved on the output shaft 2, and the crank arm 8 can rotate with the output shaft 2. A tripping rotating plate 4 is sleeved on the tripping half shaft 3, and a tripping button 5 is correspondingly arranged on one side of the tripping rotating plate 4, and the tripping rotating plate 4 is matched with the tripping button 5. A tripping electromagnet 6 and a low-power consumption tripping assembly 7 are correspondingly arranged on the bottom plate 1 for the tripping rotating plate 4. The tripping electromagnet 6 and the low-power consumption tripping assembly 7 constitute a double tripping station, which can be respectively matched with the tripping rotating plate 4 to realize the unlocking of the tripping half shaft 3; the tripping electromagnet 6 adopts an electromagnet with a relatively large power and is suitable for occasions with high power, and the low-power consumption tripping assembly 7 adopts a low-power consumption electromagnet 72 and is suitable for occasions where tripping is carried out under the induction current of passive protection. The present utility model adopts a double tripping station, selects a suitable station for tripping according to the actual working occasion, and ensures that successful tripping can be achieved in various working occasions.

[0029] The tripping rotating plate 4 includes a first rotating arm 41, a second rotating arm 42 and a locking arm 43. The first rotating arm 41 is matched with the tripping electromagnet 6, the second rotating arm 42 is matched with the low-power consumption tripping assembly 7, and the locking arm 43 is matched with the tripping button 5.

[0030] As Figure 1 、 Figure 2 shown, the low-power consumption tripping assembly 7 is fixedly connected to the bottom plate 1 through a mounting plate 71. As Figure 3 、 Figure 4 shown, a low-power consumption electromagnet 72, a rack 73 and a gear 74 that mesh with each other are arranged on the mounting plate 71 of the low-power consumption tripping assembly 7. The low-power consumption electromagnet 72 is arranged on one side of the rack 73. As Figure 1 、 Figure 2 shown, the low-power consumption electromagnet 72 and the second rotating arm 42 of the tripping rotating plate 4 are located on opposite sides of the rack 73. The ejector rod 721 of the low-power consumption electromagnet 72 faces the rack 73. When the ejector rod 721 of the low-power consumption electromagnet 72 ejects, the rack 73 can be pushed towards the direction of the second rotating arm 42, so as to drive the tripping rotating plate 4 to rotate through the second rotating arm 42; at the same time, the rack 73 drives the gear 74 to rotate forward.

[0031] As Figure 3 、 Figure 4As shown, in one embodiment, the low-power electromagnet 72 can also be fixed to the mounting plate 71 via a plastic fixed shell 79. The low-power electromagnet 72 is placed in the mounting cavity of the fixed shell 79. The fixed shell 79 is fixed to the mounting plate 71 via fasteners. The top rod 721 of the low-power electromagnet 72 extends from one side of the fixed shell 79. The fixed shell 79 includes a bottom shell 791 and an upper cover 792. The bottom shell 791 is a square frame with surrounding panels on all sides. The upper cover 792 is a semi-cylindrical cover with baffles on the front and rear sides of the arc-shaped cover, which correspond to the surrounding panels on the front and rear sides of the bottom shell 791. The surrounding panels on the bottom shell 791 and the cover and baffles of the upper cover 792 position the low-power electromagnet 72 to prevent it from moving. The rack 73 is connected to the mounting plate 71 through the first support rod 75. The mounting hole 731 on the rack 73 for connecting to the first support rod 75 is an oblong hole. The rack 73 is movably matched with the first support rod 75 through the mounting hole 731, and the rack 73 can move left and right along the first support rod 75. The gear 74 is connected to the mounting plate 71 through the second support rod 76. The gear 74 can rotate around the central axis of the second support rod 76. An interlocking arm 741 is provided on the gear 74. Figure 1 、 Figure 2 As shown, the interlocking arm 741 corresponds to the crank arm 8. When the output shaft 2 is opened, the crank arm 8 rotates along with the output shaft 2, thereby shifting the interlocking arm 741 of the gear 74, driving the gear 74 to rotate in the opposite direction, and the gear 74 drives the rack 73 to move toward the low-power electromagnet 72 to reset, thereby pushing the top rod 721 of the low-power electromagnet 72 back to its original position.

[0032] like Figure 5 、 Figure 6 As shown, in another embodiment, the low-power electromagnet 72 is pressed and fixed to the mounting plate 71 by a fixing bracket 77. In this embodiment, the fixing bracket 77 is a V-shaped bracket; in other embodiments, other forms of brackets, such as U-shaped brackets, arc-shaped brackets, etc., can also be used, as long as they can achieve the fixation of the low-power electromagnet 72. A fixing plate 78 is provided on one side of the low-power electromagnet 72. The fixing plate 78 is located on the other side opposite the rack 73. The fixing plate 78 positions the low-power electromagnet 72 to prevent it from moving.

[0033] When the present invention is actually used, (1) when the tripping electromagnet 6 is used for tripping: the iron core of the tripping electromagnet 6 extends out to the top of the first rotating arm 41, pushing the tripping turn plate 4 to rotate, and the locking arm 43 of the tripping turn plate 4 unlocks the tripping button 5, and the tripping button 5 can perform the tripping operation on the output shaft 2; after the tripping is completed, the iron core of the tripping electromagnet 6 is reset under the action of the reset spring, the first rotating arm 41 is released, the tripping turn plate 4 is reset, and the locking arm 43 re-locks the tripping button 5. (2) When the low-power tripping component 7 is used for tripping: as Figure 1As shown, after the low-power electromagnet 72 is energized, its push rod 721 is pushed out, pushing the rack 73 toward the second rotating arm 42, pushing the opening turn plate 4 to rotate, and the locking arm 43 of the opening turn plate 4 unlocks the opening button 5, and the opening button 5 can open the output shaft 2; Figure 2 As shown, when the output shaft 2 is opened, it drives the crank arm 8 to rotate, drives the gear 74 to rotate, and then drives the rack 73 to move toward the low-power electromagnet 72 to reset, releases the second rotating arm 42, resets the opening turn plate 4, and relocks the opening button 5. The rack 73 pushes the top rod 721 of the low-power electromagnet 72 back to its position while resetting.

[0034] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. A low-power tripping component, characterized in that: A low-power electromagnet (72), a rack (73) and a gear (74) meshing with each other are provided on the mounting plate (71). The low-power electromagnet (72) is provided on one side of the rack (73), and a push rod (721) of the low-power electromagnet (72) faces the rack (73). When the low-power electromagnet (72) is energized, its push rod (721) is pushed out, pushing the rack (73) forward, and the rack (73) drives the gear (74) to rotate in the forward direction. When the gear (74) rotates in the reverse direction, it drives the rack (73) to move back to its original position, and pushes the push rod (721) back to its original position.

2. The low-power tripping component according to claim 1, wherein: An interlocking arm (741) extends from the gear (74).

3. The low-power tripping assembly according to claim 1, characterized in that: The low-power electromagnet (72) is placed in the mounting cavity of the fixed shell (79), the fixed shell (79) is fixed to the mounting plate (71), and the top rod (721) of the low-power electromagnet (72) extends from one side of the fixed shell (79); the fixed shell (79) includes a bottom shell (791) and an upper cover (792); the bottom shell (791) is surrounded by a surrounding plate, and the upper cover (792) is a semi-cylindrical cover, and the front and rear sides of the arc-shaped cover plate are respectively provided with baffles, and the baffles correspond to the surrounding plates on the front and rear sides of the bottom shell (791).

4. The low-power tripping component according to claim 1, characterized in that: The low-power electromagnet (72) is pressed and fixed to the mounting plate (71) through a fixing bracket (77), and a fixing plate (78) is provided on one side of the low-power electromagnet (72); the fixing bracket (77) is a V-shaped bracket, a U-shaped bracket, or an arc-shaped bracket.

5. The low-power tripping component according to claim 1, wherein: The rack (73) is connected to the mounting plate (71) through the first support rod (75); the mounting hole (731) on the rack (73) connected to the first support rod (75) is an oblong hole; the rack (73) is movably engaged with the first support rod (75) through the mounting hole (731); the gear (74) is connected to the mounting plate (71) through the second support rod (76); the gear (74) is rotatable around the central axis of the second support rod (76).

6. A double-opening circuit breaker mechanism, characterized in that: An output shaft (2) and a trip half-shaft (3) are provided on the bottom plate (1); a trip turn plate (4) is sleeved on the trip half-shaft (3); a trip button (5) is provided on one side of the trip turn plate (4); the trip turn plate (4) cooperates with the trip button (5); a trip electromagnet (6) and a low-power trip component (7) as described in claim 1 are provided on the bottom plate (1) corresponding to the trip turn plate (4); when the trip is opened, the trip turn plate (4) can be pushed to rotate by the trip electromagnet (6) or the low-power trip component (7) to unlock the trip button (5).

7. The double-opening circuit breaker mechanism according to claim 6, characterized in that: The output shaft (2) is provided with a crank arm (8), which can rotate with the output shaft (2); the crank arm (8) corresponds to the interlocking arm (741) of the gear (74), and when the crank arm (8) rotates with the output shaft (2), the interlocking arm (741) of the gear (74) can be toggled to drive the gear (74) to rotate in the opposite direction.

8. The double-opening circuit breaker mechanism according to claim 6, characterized in that: The opening switch plate (4) comprises a first rotating arm (41), a second rotating arm (42) and a locking arm (43); the first rotating arm (41) cooperates with the opening electromagnet (6); the second rotating arm (42) cooperates with the low-power opening switch assembly (7); and the locking arm (43) cooperates with the opening switch button (5).

9. The double-opening circuit breaker mechanism according to claim 6, characterized in that: The low-power opening component (7) is fixedly connected to the bottom plate (1) through the mounting plate (71).

10. The double-opening circuit breaker mechanism according to claim 6, characterized in that: The opening electromagnet (6) uses a high-power electromagnet, and the low-power opening component (7) uses a low-power electromagnet (72).

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