A circuit breaker assembly and ring main unit

Abstract

The application discloses a circuit breaker assembly and a ring main unit. The circuit breaker assembly comprises a support, a circuit breaker connected to the support, a push-pull rod arranged on the circuit breaker for opening and closing, a swing rod, one end of the swing rod being hinged to the push-pull rod, a connecting rod, one end of the connecting rod being drivingly connected to the other end of the swing rod, the connecting rod being used for driving the swing rod to swing, a swing wheel, the swing wheel being rotatably connected to the support, the swing wheel being provided with an L-shaped slot, the other end of the connecting rod being slidingly connected in the L-shaped slot, and the inner wall of the L-shaped slot being used for pushing and pulling the other end of the connecting rod to make the connecting rod move fast at first and then slowly. The L-shaped slot is arranged. Due to the L-shaped shape of the L-shaped slot, when the swing wheel rotates, the pushing force of the inner wall of the L-shaped slot on the connecting rod is from large to small, so the movement speed of the connecting rod is also from large to small, that is, when the other end of the connecting rod slides in the L-shaped slot, the speed is fast at first and then slow, and vice versa, so that the circuit breaker can be quickly opened and closed.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, and particularly to a circuit breaker assembly and a ring main unit. Background Technology

[0002] Ring main units are commonly used power distribution cabinets, and circuit breaker assemblies are installed inside the ring main unit.

[0003] The circuit breaker assembly includes a circuit breaker with a push-pull rod that moves to open or close the circuit breaker.

[0004] Previously, circuit breakers operated at the same speed when closing or opening, which could lead to insufficient closing pressure and unstable voltage after the circuit breaker was connected. In addition, previous circuit breakers did not have self-locking capability when opening or closing, making them susceptible to unstable factors such as external forces, resulting in unstable opening and closing and easy voltage fluctuations. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a circuit breaker assembly capable of rapid opening or closing and equipped with a self-locking function.

[0006] The present invention also proposes a ring main unit having the above-mentioned circuit breaker assembly.

[0007] According to a first aspect of the present invention, a circuit breaker assembly includes a bracket; a circuit breaker connected to the bracket, the circuit breaker having a push-pull rod for opening and closing; a rocker arm, one end of which is hinged to the push-pull rod; a connecting rod, one end of which is throttle-connected to the other end of the rocker arm, the connecting rod being used to drive the rocker arm to swing; and a swing wheel rotatably connected to the bracket, the swing wheel having an L-shaped groove, the other end of the connecting rod being slidably connected in the L-shaped groove, the inner wall of the L-shaped groove being used to push and pull the other end of the connecting rod, causing the connecting rod to move quickly at first and then slowly.

[0008] According to an embodiment of the present invention, a circuit breaker assembly has at least the following beneficial effects: Due to the L-shaped shape of the L-shaped groove, when the balance wheel rotates, the inner wall of the L-shaped groove exerts a decreasing force on the connecting rod, thus causing the connecting rod's movement speed to also decrease. That is, when the other end of the connecting rod slides in the L-shaped groove, its speed is initially fast and then slows down, and vice versa. Therefore, the circuit breaker can be opened and closed quickly. Furthermore, because the other end of the connecting rod requires greater force to cross the inflection point of the L-shape, the inflection point of the L-shape also acts as a self-locking mechanism for the connecting rod, preventing it from retracting and thus preventing the push-pull rod of the circuit breaker from loosening; ultimately, this avoids problems of voltage instability and power fluctuations.

[0009] According to some embodiments of the present invention, a drive rod is connected to the other end of the swing arm, the drive rod is rotatably connected to the bracket, a connecting block is connected to the drive rod, the connecting block is hinged to one end of the connecting rod, multiple circuit breakers are provided, each circuit breaker corresponds to one swing arm, the drive rod is connected to the other end of each swing arm, the drive rod and the connecting block are provided, the rotational motion of the swing wheel can be converted into the pushing motion of the drive rod on the push-pull rod, and the drive rod can also be easily disassembled and installed, ultimately facilitating the transportation and replacement of the drive rod, and the drive rod can be used to simultaneously drive multiple circuit breakers to open and close, which is convenient and quick.

[0010] According to some embodiments of the present invention, the other end of the swing arm is provided with a polygonal hole, and the drive rod is fitted into the polygonal hole. The polygonal hole prevents the drive rod from rotating relative to the push rod in the polygonal hole, thereby reducing the thrust of the swing arm on the push-pull rod.

[0011] According to some embodiments of the present invention, the polygon is a regular quadrilateral, a regular hexagon, or a regular octagon, with a standard shape, making it easy to manufacture or purchase the drive rod and reducing production troubles.

[0012] According to some embodiments of the present invention, the bracket is provided with a guide groove, and the connecting rod is provided with a slider, the slider being slidably connected in the guide groove. The guide groove is provided to limit the displacement of the connecting rod, so that the connecting rod moves along the length direction of the guide groove under the drive of the balance wheel.

[0013] According to some embodiments of the present invention, two connecting rods are provided, the slider is disposed on the connecting rods, the balance wheel and the connecting block are both disposed between the two connecting rods, one end of the two connecting rods is connected by a first pin, and the other end is connected by a second pin. The first pin is hinged to the connecting block, and the second pin is slidably connected in the L-shaped groove. The two connecting rods can balance the force on the connecting rods. A large torque is easily generated at the hinge point of the first pin and the connecting block, and also at the sliding connection point of the second pin and the L-shaped groove. Over time, the connecting rod is prone to breakage.

[0014] According to some embodiments of the present invention, two swing rods are provided, and a push block is connected to the end of the push-pull rod. The push block is hinged between the two swing rods. The push block can prevent the swing rod and the push-pull rod from being directly connected, which would cause the push-pull rod to bend under force. In addition, the two swing rods can also play a role in balancing the force, preventing a single swing rod from being subjected to a large torque at the hinge of the push block, thereby causing the single swing rod to bend or break.

[0015] According to some embodiments of the present invention, an insulating partition is provided between two adjacent circuit breakers, and the insulating partition is used to isolate the two adjacent circuit breakers and prevent the two adjacent circuit breakers from interfering with each other.

[0016] A ring main unit according to a second aspect of the present invention includes the circuit breaker assembly described above.

[0017] According to an embodiment of the present invention, a ring main unit has at least the following beneficial effects: the ring main unit having the circuit breaker assembly can quickly open and close the circuit and has a self-locking effect.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of a circuit breaker assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a ring main unit including the circuit breaker assembly of an embodiment of the present invention;

[0022] Figure 3 for Figure 1 The diagram shows the structure of the balance wheel, connecting rod, and drive rod of the circuit breaker assembly. Figure 1 ;

[0023] Figure 4 for Figure 1 The diagram shows the structure of the balance wheel, connecting rod, and drive rod of the circuit breaker assembly. Figure 2 ;

[0024] Figure 5 for Figure 1 The diagram shows the structure of the circuit breaker assembly when the balance wheel is not rotating;

[0025] Figure 6 for Figure 1 The diagram shows the structure of the circuit breaker assembly after the balance wheel has rotated.

[0026] Figure 7 for Figure 1 The diagram shows the force exerted on the second pin of the circuit breaker assembly in the L-shaped slot 510. Figure 1 ;

[0027] Figure 8 for Figure 1The diagram shows the force exerted on the second pin of the circuit breaker assembly in the L-shaped slot 510. Figure 2 .

[0028] Bracket 100, guide groove 110;

[0029] Circuit breaker 200, push-pull rod 210;

[0030] 300mm swing arm, 310mm polygonal hole;

[0031] Link 400, slider 410, first pin 420, second pin 430;

[0032] Balance wheel 500, L-shaped groove 510;

[0033] Drive rod 600, connecting block 610;

[0034] Push block 700, insulating partition 800. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 8A circuit breaker assembly includes a bracket 100; a circuit breaker 200 connected to the bracket 100, the circuit breaker 200 having a push-pull rod 210 for opening and closing; a rocker arm 300, one end of which is hinged to the push-pull rod 210; a connecting rod 400, one end of which is drively connected to the other end of the rocker arm 300, the connecting rod 400 being used to drive the rocker arm 300 to swing; and a swing wheel 500 rotatably connected to the bracket 100, the swing wheel 500 having an L-shaped groove 510, the other end of the connecting rod 400 being slidably connected in the L-shaped groove 510, the inner wall of the L-shaped groove 510 being used to push and pull the other end of the connecting rod 400, causing the connecting rod 400 to move quickly at first and then slowly. The L-shaped groove 510, due to its L-shape, exerts a decreasing thrust on the connecting rod 400 from its inner wall as the balance wheel 500 rotates. Consequently, the speed of the connecting rod 400 also decreases. That is, when the other end of the connecting rod 400 slides in the L-shaped groove 510, its speed is initially fast and then slows down, and vice versa. This allows the circuit breaker 200 to open and close quickly. Furthermore, because the other end of the connecting rod 400 requires greater force to cross the inflection point of the L-shape, the inflection point of the L-shape also acts as a self-locking mechanism for the connecting rod 400, preventing it from retracting and thus preventing the push-pull rod 210 of the circuit breaker 200 from loosening. Ultimately, this avoids problems such as voltage instability and power fluctuations.

[0040] Reference Figure 7 and Figure 8 The second pin 430 slides in the L-shaped groove 510, and is subjected to gravity G and support force Fsupport. Since the second pin 430 is connected to the connecting rod 400, the thrust on the second pin 430 is the same as the thrust on the connecting rod 400, which is the resultant force Fpush of gravity G and support. (Refer to...) Figure 8 Since gravity G and support F are constant, the magnitude of push F is related to angle α, i.e., push F = support F × cosα. The larger the angle α, the smaller push F. Correspondingly, the more counterclockwise the balance wheel 500 rotates, the smaller push F becomes. Therefore, during the counterclockwise rotation of the balance wheel 500, the thrust exerted by the inner wall of the L-shaped groove 510 on the connecting rod 400 decreases, thus enabling rapid closing. When the second pin 430 passes the inflection point of the L-shaped groove 510, the inflection point can create a self-locking effect on the second pin 430. It is understandable that the two sections of the L-shaped groove 510 have different lengths, and the rotation axis of the balance wheel 500 is positioned closer to the longer section of the L-shaped groove 510.

[0041] In some embodiments, the L-shaped groove 510 can be replaced with an arc-shaped groove.

[0042] In some embodiments, a drive rod 600 is connected to the other end of the swing arm 300. The drive rod 600 is rotatably connected to the bracket 100. A connecting block 610 is connected to the drive rod 600. The connecting block 610 is hinged to one end of the connecting rod 400. Multiple circuit breakers 200 are provided, and each circuit breaker 200 corresponds to a swing arm 300. The drive rod 600 is connected to the other end of each swing arm 300. By setting the drive rod 600 and the connecting block 610, the rotational motion of the swing wheel 500 can be converted into the pushing motion of the drive rod 600 on the push-pull rod 210. The drive rod 600 can also be easily disassembled and installed, and ultimately facilitates transportation and replacement of the drive rod 600. The drive rod 600 can be used to drive multiple circuit breakers 200 to open and close simultaneously, which is convenient and quick.

[0043] In some embodiments, the other end of the rocker arm 300 is provided with a polygonal hole 310, and the drive rod 600 is inserted into the polygonal hole 310. The polygonal hole 310 prevents the drive rod 600 from rotating relative to the rocker arm 300 in the polygonal hole 310, thereby reducing the thrust of the rocker arm 300 on the push-pull rod 210.

[0044] In some embodiments, the polygon is a regular quadrilateral, a regular hexagon, or a regular octagon, with a standard shape, making it easy to manufacture or purchase the drive rod 600 and reducing production hassles.

[0045] In some embodiments, the bracket 100 is provided with a guide groove 110, and the connecting rod 400 is provided with a slider 410. The slider 410 is slidably connected in the guide groove 110. The guide groove 110 is provided to limit the displacement of the connecting rod 400, so that the connecting rod 400 moves along the length direction of the guide groove 110 under the drive of the balance wheel 500.

[0046] In some embodiments, two connecting rods 400 are provided, a slider 410 is provided on the connecting rods 400, and the balance wheel 500 and the connecting block 610 are both provided between the two connecting rods 400. One end of the two connecting rods 400 is connected by a first pin 420, and the other end is connected by a second pin 430. The first pin 420 is hinged to the connecting block 610, and the second pin 430 is slidably connected in the L-shaped groove 510. The two connecting rods 400 can balance the force on the connecting rods 400. A large torque is easily generated at the hinge point of the first pin 420 and the connecting block, and also at the sliding connection point of the second pin 430 and the L-shaped groove 510. Over time, the connecting rod 400 is prone to breakage.

[0047] In some embodiments, two rocker arms 300 are provided, and a push block 700 is connected to the end of the push-pull rod 210. The push block 700 is hinged between the two rocker arms 300. The push block 700 can prevent the push-pull rod 210 from bending due to direct connection between the rocker arms 300 and the push-pull rod 210. The two rocker arms 300 can also play a role in balancing the force and prevent a single rocker arm 300 from being subjected to a large torque at the hinge of the push block 700, which would cause the single rocker arm 300 to bend or break.

[0048] In some embodiments, an insulating partition 800 is provided between two adjacent circuit breakers 200. The insulating partition 800 is used to isolate the two adjacent circuit breakers 200 and prevent the two adjacent circuit breakers 200 from interfering with each other.

[0049] A ring main unit includes a circuit breaker 200 assembly. The ring main unit with the circuit breaker 200 assembly is capable of rapid opening and closing and has a self-locking effect.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A circuit breaker assembly, characterized in that, include: support; A circuit breaker is connected to the bracket, and the circuit breaker is provided with a push-pull rod for opening and closing the circuit; A swing arm, one end of which is hinged to the push-pull rod; A connecting rod, one end of which is connected to the other end of the swing rod, is used to drive the swing rod to swing. A balance wheel is rotatably connected to the bracket. The balance wheel is provided with an L-shaped groove. The other end of the connecting rod is slidably connected in the L-shaped groove. The inner wall of the L-shaped groove is used to push and pull the other end of the connecting rod, so that the connecting rod moves quickly at first and then slowly. The other end of the swing arm is connected to a drive rod, the drive rod is rotatably connected to the bracket, a connecting block is connected to the drive rod, the connecting block is hinged to one end of the connecting rod, multiple circuit breakers are provided, the circuit breakers and the swing arms correspond one to one, and the drive rod is connected to the other end of each swing arm; The bracket is provided with a guide groove, and the connecting rod is provided with a slider, which is slidably connected in the guide groove; Two connecting rods are provided, the slider is provided on the connecting rods, the balance wheel and the connecting block are both provided between the two connecting rods, one end of the two connecting rods is connected by a first pin, and the other end is connected by a second pin. The first pin is hinged to the connecting block, and the second pin is slidably connected in the L-shaped groove. The other end of the swing arm has a polygonal hole, and the drive rod is inserted into the polygonal hole.

2. A circuit breaker assembly according to claim 1, characterized in that: The polygon is a regular quadrilateral, a regular hexagon, or a regular octagon.

3. A circuit breaker assembly according to claim 1, characterized in that: The swing arm is provided with two rods, and the end of the push-pull rod is connected to a push block, which is hinged between the two swing arms.

4. A circuit breaker assembly according to claim 1, characterized in that: An insulating partition is provided between two adjacent circuit breakers.

5. A ring main unit, characterized in that, Includes the circuit breaker assembly as described in any one of claims 1 to 4.

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