Circuit breaker reclosing device

Abstract

The invention discloses a circuit breaker reclosing device which comprises a circuit breaker and a reclosing accessory, the reclosing accessory is fixedly connected with the circuit breaker through a connecting piece, a handle of the circuit breaker is connected with a handle connecting rod of the reclosing accessory, and the reclosing accessory receives a control signal to drive the circuit breaker to perform closing and opening actions. The method is used for realizing automatic closing and opening of the circuit breaker. Compared with the prior art, in the closing process of the reclosing accessory, the reclosing auxiliary handle closing structure can push a circuit breaker handle farthest from the reclosing accessory to close in the closing process through the structural design; therefore, the problem that the circuit is blocked or burnt due to the fact that the farthest circuit breaker is not closed in place can be solved, the closing reliability is improved, the use experience of a customer is improved, the circuit safety is improved, and safer and more reliable use experience is brought to the customer.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker reclosing device. Background Art

[0002] At present, miniature circuit breakers are widely used in low-voltage power distribution networks, mainly in various places such as industry, commerce, high-rise buildings and residential buildings. They can provide overcurrent protection and leakage protection for electrical equipment such as motors, distribution lines, and lighting circuits. The opening and closing actions of traditional miniature circuit breakers require manual operation. With the development of my country's smart grid, it is increasingly urgent to realize the intelligence of control electrical appliances under the premise of requiring safe operation of the power grid. In order to cope with new changes in the situation, the existing miniature circuit breakers should have an automatic reclosing function. The automatic reclosing device of the circuit breaker is an accessory used for long-distance electric opening and closing of circuit breakers.

[0003] At present, during use, the reclosing accessories need to drive the multi-pole circuit breaker to close and open. Generally, the reclosing accessories are installed on the left or right side of the circuit breaker, and the circuit breaker handle is driven by a handle connecting rod to close and open. When driving single-pole and double-pole circuit breakers, due to the small width of the circuit breaker handle, the first and second poles of the circuit breaker can be reliably closed during the closing process. However, when driving the three-pole or four-pole circuit breaker to close, the closing force of the reclosing accessory handle connecting rod can only act on the first and second poles of the circuit breaker. In the two-pole products of the circuit breaker far away from the reclosing accessories, especially the circuit breaker at the farthest point, during the closing process, due to the rigidity of the linkage of the multi-pole circuit breaker handle and the gap between the accessories, the circuit breaker close to the reclosing device can be reliably closed, but the last pole circuit breaker cannot be reliably closed. After the reclosing accessories are closed, the handle of the last pole product cannot be closed in place, which will affect the connection of the internal contacts of the circuit breaker, causing the line to be blocked or burned, and may cause safety accidents. Affects customer benefits.

[0004] Therefore, the present invention needs to provide a closing structure through the reclosing auxiliary handle during the closing process of the reclosing accessory, which can push the circuit breaker handle farthest from the reclosing accessory to close the circuit breaker through structural design during the closing process. In this way, the problem of line blockage or burning caused by the farthest circuit breaker not being closed in place can be solved, the closing reliability is improved, the customer experience is improved, the line safety is improved, and a safer and more reliable user experience is brought to customers. Summary of the invention

[0005] The object of the present invention is to provide a circuit breaker reclosing device to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A circuit breaker reclosing device comprises: a circuit breaker and a reclosing accessory, wherein the reclosing accessory is fixedly connected to the circuit breaker via a connecting piece, the handle of the circuit breaker is connected to the handle connecting rod of the reclosing accessory, and the reclosing accessory receives a control signal to drive the circuit breaker to perform closing and opening actions, so as to realize automatic closing and opening of the circuit breaker.

[0007] Furthermore, the reclosing switch accessory includes a base and an upper cover, the upper cover is buckled on the base, a motor is installed on the base, a worm is installed on the motor, the worm is meshed with a gear assembly, the gear assembly is meshed with a driving gear, and the handle connecting rod is driven by the rotation of the driving gear, and the handle connecting rod drives the handle of the circuit breaker to realize opening and closing.

[0008] Furthermore, the driving gear comprises a driving gear body, a driving gear hole is provided in the middle of the driving gear body, a protrusion is provided on one side of the driving gear body close to the handle connecting rod, and the two side surfaces of the protrusion are a first driving gear surface and a second driving gear surface.

[0009] Furthermore, the handle connecting rod includes: a rotating part, a rotating shaft hole is provided in the middle of the rotating part, a connecting slot is provided at the upper end of the rotating part, the connecting slot is used to connect with the handle of the circuit breaker, and a connecting hole is also provided on the upper side of the connecting slot.

[0010] Furthermore, the shape of the connecting slot is the same as that of the handle.

[0011] Furthermore, the rotating part is a semicircular arc with an opening, and a first convex part and a second convex part are provided at two ends of the semicircular arc opening, and the driving gear is installed in the rotating part.

[0012] Furthermore, it also includes a push rod, which is installed on the handle connecting rod and the handle, one end of the push rod is located on the farthest handle, and the other end of the push rod is located on the handle connecting rod close to the reclosing switch accessory and is fixed by screws.

[0013] Furthermore, the push rod includes a push rod body, one end of the push rod body is provided with a first fixing surface and a second fixing surface, the first fixing surface and the second fixing surface are designed relative to each other, the other end of the push rod body is provided with a third fixing surface, the first fixing surface and the third fixing surface are arranged on the same side, the first fixing surface and the second fixing surface form a U-shaped card, the U-shaped card is clamped on the handle connecting rod, and the third fixing surface is in contact with the handle.

[0014] Furthermore, a mounting hole is provided on the push rod body, and the mounting hole corresponds to the position of the connecting hole.

[0015] Furthermore, the gear assembly includes a first gear, a second gear, a third gear and a fourth gear, the first gear, the third gear and the fourth gear are compound gears, the second gear is a spur gear, the first gear is respectively meshed with the worm and the second gear, the second gear is meshed with the third gear, the third gear is meshed with the third gear, and the fourth gear is meshed with the driving gear.

[0016] The beneficial effects of the present invention are: Since the present invention is provided with a reclosing accessory, a control signal is received through the reclosing accessory, the control signal drives the motor, and the driving motor provides driving force to drive the handle connecting rod to move through the gear assembly. Since the handle connecting rod is connected to the handle, the movement of the handle is driven by the movement of the handle connecting rod, thereby realizing the automatic opening and closing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the circuit breaker reclosing device of the present invention; Figure 2 It is a structural diagram of the circuit breaker reclosing device of the present invention; Figure 3 It is the internal structure diagram of the reclosing accessory of the present invention; Figure 4 is a structural diagram of the driving gear of the present invention; Figure 5 It is a structural diagram of the handle connecting rod of the present invention; Figure 6 It is a structural diagram of the handle connecting rod of the present invention; Figure 7 It is a structural diagram of the push rod of the present invention; Figure 8 It is a structural diagram of the circuit breaker reclosing device of the present invention; Fig. 9 It is a structural diagram of a handle of the present invention.

[0018] Reference numerals: Circuit breaker 1, reclosing accessories 2, handle 3, handle connecting rod 4, push rod 5, positioning block 6; Base 21, motor 22, worm 23, gear assembly 24, driving gear 25; The driving gear body 251, the driving gear hole 252, the protrusion 253, the first driving gear surface 254, and the second driving gear surface 255; Rotating portion 41, rotating shaft hole 42, connecting slot 43, first convex portion 44, second convex portion 45, connecting hole 46, first limiting surface 47, second limiting surface 48; The push rod body 51 , the first fixing surface 52 , the second fixing surface 53 , the third fixing surface 54 , and the mounting hole 55 . DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0023] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0024] like Figures 1 to 9 As shown, a circuit breaker reclosing device comprises: a circuit breaker 1 and a reclosing accessory 2, wherein the reclosing accessory 2 is fixedly connected to the circuit breaker 1 via a connecting piece. In the present embodiment, the connecting piece is a bayonet or a rivet, and its specific use is determined according to actual needs and is not limited here. The handle 3 of the circuit breaker is connected to the handle connecting rod 4 of the reclosing accessory, and the reclosing accessory 2 receives a control signal to drive the circuit breaker to perform closing and opening actions, so as to realize automatic closing and opening of the circuit breaker.

[0025] It can be known from the above method that, since the present invention is provided with a reclosing switch accessory 2, a control signal is received through the reclosing switch accessory 2, the control signal drives the motor, and the driving motor provides a driving force to drive the handle connecting rod to move through the gear assembly. Since the handle connecting rod 4 is connected to the handle 3, the movement of the handle connecting rod 4 drives the handle 3 to move, thereby realizing the automatic opening and closing function.

[0026] In addition, it is worth noting that Figure 3 As shown, the reclosing switch accessory 2 includes a base 21 and an upper cover, the upper cover is buckled on the base 21, and the base 21 and the upper cover are fixedly connected by screws, and a motor 22 is installed on the base 21. In order to firmly install the motor 21 on the base 21, a fixing groove is also provided on the base 21 where the motor 22 is installed. During assembly, the motor 22 is installed in the fixing groove, and a worm 23 is installed on the upper end of the motor 22. The axial rotation force of the motor 22 changes direction and performs torque amplification through the worm 23 and the gear assembly 24 installed on the base 21, and is transmitted to the driving gear The driving gear 25 is mounted on a shaft 26. One end of the shaft 26 close to the base 21 is fixedly connected to the base. The driving gear 25 can rotate around the shaft 26 through the driving gear hole. The motor 22 rotates clockwise to drive the driving gear 25 to rotate. During the rotation, the driving gear 25 can drive the handle connecting rod 4 to move, and the handle connecting rod 4 can drive the handle 3 to move. The gear assembly 24 is meshed with the driving gear 25. The handle connecting rod 4 is driven by the rotation of the driving gear 25, and the handle connecting rod 4 drives the handle 3 of the circuit breaker to realize opening and closing.

[0027] Specifically, in this embodiment, if Figure 4 As shown, the driving gear 25 includes a driving gear body 251, a driving gear hole 252 is provided in the middle of the driving gear body 251, and the driving gear body is installed on the shaft through the driving gear hole. The driving gear body 251 is also provided with a protrusion 253 on the side close to the handle connecting rod. The protrusion 253 is fixedly connected to the driving gear body by integral molding or welding. The two side surfaces of the protrusion are the first driving gear surface 254 and the second driving gear surface 255. The upper end of the protrusion is larger than the lower end, and the first driving gear surface 254 and the second driving gear surface 255 on both sides form a slope surface.

[0028] In addition, it should be noted that Figure 5 and Figure 6As shown, the handle connecting rod 4 includes: a rotating part 41, a rotating shaft hole 42 is provided in the middle of the rotating part 41, a connecting slot 43 is provided at the upper end of the rotating part 41, the connecting slot 43 is connected to the rotating part 41 by an integral molding method, the connecting slot 43 is used to connect with the handle 3 of the circuit breaker, and the connecting slot 43 is also connected with a hole 46 on the top; the rotating part 41 is a semicircular arc with an opening, and a first convex portion 44 and a second convex portion 45 are also provided at the two ends of the semicircular arc opening, and the driving gear 25 is installed in the rotating part 41; the shape of the connecting slot 43 is the same as that of the handle 3, and the rotating part The part is also provided with a first limit surface 47 and a second limit surface 48, which are respectively located on both sides of the rotating shaft hole 42. When the driving gear 25 rotates, the first driving gear surface 254 on the driving gear 25 contacts the first limit surface 47 during the rotation process, and the motor 22 rotates counterclockwise to drive the driving gear 25 to rotate. During the rotation process, the second driving gear surface 255 on the driving gear 25 rotates together, and the second driving gear surface 255 contacts the second limit surface 48 during the rotation process. The driving gear 25 can drive the handle connecting rod 4 to move, and the handle connecting rod 4 can drive the handle 3 to move, thereby realizing the circuit breaker closing function.

[0029] When the circuit breaker has many poles, in order to ensure the synchronism of closing and opening, in this embodiment, a push rod 5 is further included, and the push rod 5 is installed on the handle connecting rod 4 and the handle 3, so that the handle connecting rod 4 and the handle 3 are fixedly connected. During installation, one end of the push rod 5 is installed on the farthest handle 3, and the other end of the push rod 5 is installed on the handle connecting rod 4 close to the reclosing attachment 2, and is fixed by a positioning block 6; Further, if Figure 7 and Figure 8As shown, the push rod 5 includes a push rod body 51, one end of the push rod body 51 is provided with a first fixing surface 52 and a second fixing surface 53, the first fixing surface 52 and the second fixing surface 53 are designed relative to each other, the other end of the push rod body is provided with a third fixing surface 54, the first fixing surface 52 and the third fixing surface 54 are arranged on the same side, the first fixing surface 52 and the second fixing surface 53 form a U-shaped card, the U-shaped card is clamped on the handle connecting rod 4, the third fixing surface 54 is in contact with the handle 3, and during the closing process of the circuit breaker 1, the handle connecting rod 4 drives the handle 3 to close the circuit breaker 1, and the push rod 5 also moves together with the handle connecting rod 4. When the handle connecting rod 4 moves to the point where the closing is about to be completed, the push rod 5 moves together with the handle connecting rod 4. The lower end of the second fixed surface of the push rod 5 contacts the upper end surface of the reclosing accessory 1 and is blocked, and stops moving together with the handle connecting rod 4. The handle connecting rod 4 continues to drive the handle 3 to move. The push rod 5 begins to rotate around the positioning block 6 due to the obstruction. The third fixed surface 54 of the push rod 5 contacts the handle surface 31, and the rotational force of the third fixed surface 54 of the push rod 5 is transmitted to the handle surface 31, and becomes a force to push the handle to move. The handle connecting rod 4 drives the handle 3 to move to complete the closing action. The push rod 5 can push the farthest handle 3 to complete the closing movement. Under the thrust of the push rod 5, the farthest handle 3 can synchronously complete the closing action with the handles of other poles and contact the outer shell surface 11 of the circuit breaker to complete the closing process of the circuit breaker.

[0030] In addition, it should be noted that a mounting hole 55 is also provided on the push rod body 51, and the mounting hole 55 corresponds to the position of the connecting hole 46. After the fixing block 6 is passed through the mounting hole 55 and the connecting hole 46, the push rod 5 and the handle connecting rod 4 are fixedly connected to each other to prevent deformation of the push rod 5 and the handle connecting rod 4 due to force.

[0031] In order to amplify the transmission torque and reduce the rotational speed during the closing and opening process, in this embodiment, the gear assembly 24 includes a first gear, a second gear, a third gear and a fourth gear, the first gear, the third gear and the fourth gear are compound gears, the second gear is a spur gear, the first gear is meshed with the worm and the second gear respectively, the second gear is meshed with the third gear, the third gear is meshed with the third gear, and the fourth gear is meshed with the driving gear. Since the gear assembly 24 includes the first gear, the second gear, the third gear and the fourth gear, the gear assembly formed by the meshing of multiple gears is a stacked structure, which can amplify the transmission torque and reduce the rotational speed, making the closing and opening process more reliable. In addition, in order to facilitate installation and reasonable design, the width of the gear stacking direction of the gear assembly 24 is consistent with the width of the reclosing accessory and the circuit breaker.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A circuit breaker reclosing device, characterized in that: include: A circuit breaker and a reclosing accessory, wherein the reclosing accessory is fixedly connected to the circuit breaker via a connecting piece, the handle of the circuit breaker is connected to the handle connecting rod of the reclosing accessory, and the reclosing accessory receives a control signal to drive the circuit breaker to perform closing and opening actions, so as to realize automatic closing and opening of the circuit breaker.

2. The circuit breaker reclosing device according to claim 1, characterized in that: The reclosing switch accessory includes a base and an upper cover, the upper cover is buckled on the base, a motor is installed on the base, a worm is installed on the motor, the worm is meshed with a gear assembly, the gear assembly is meshed with a driving gear, and the handle connecting rod is driven by the rotation of the driving gear, and the handle connecting rod drives the handle of the circuit breaker to realize opening and closing.

3. The circuit breaker reclosing device according to claim 2, characterized in that: The driving gear comprises a driving gear body, a driving gear hole is arranged in the middle of the driving gear body, a protrusion is arranged on the side of the driving gear body close to the handle connecting rod, and two side surfaces of the protrusion are a first driving gear surface and a second driving gear surface.

4. The circuit breaker reclosing device according to claim 1, characterized in that: The handle connecting rod comprises: a rotating part, a rotating shaft hole is arranged in the middle of the rotating part, a connecting slot is arranged at the upper end of the rotating part, the connecting slot is used to connect with the handle of the circuit breaker, and a connecting hole is also arranged on the upper side of the connecting slot.

5. The circuit breaker reclosing device according to claim 4, characterized in that: The shape of the connecting slot is the same as that of the handle.

6. The circuit breaker reclosing device according to claim 4, characterized in that: The rotating part is a semicircular arc with an opening, and a first convex part and a second convex part are provided at two ends of the semicircular arc opening, and the driving gear is installed in the rotating part.

7. The circuit breaker reclosing device according to claim 1, characterized in that: It also includes a push rod, which is installed on the handle connecting rod and the handle. One end of the push rod is located on the farthest handle, and the other end of the push rod is located on the handle connecting rod close to the reclosing switch accessory and is fixed by screws.

8. The circuit breaker reclosing device according to claim 7, characterized in that: The push rod includes a push rod body, one end of which is provided with a first fixing surface and a second fixing surface, the first fixing surface and the second fixing surface are designed relative to each other, the other end of the push rod body is provided with a third fixing surface, the first fixing surface and the third fixing surface are arranged on the same side, the first fixing surface and the second fixing surface form a U-shaped card, the U-shaped card is clamped on the handle connecting rod, and the third fixing surface is in contact with the handle.

9. The circuit breaker reclosing device according to claim 8, characterized in that: The push rod body is also provided with a mounting hole, and the mounting hole corresponds to the position of the connecting hole.

10. The circuit breaker reclosing device according to claim 1, characterized in that: The gear assembly includes a first gear, a second gear, a third gear and a fourth gear, wherein the first gear, the third gear and the fourth gear are compound gears, the second gear is a spur gear, the first gear is respectively meshed with a worm and a second gear, the second gear is meshed with the third gear, the third gear is meshed with the third gear, and the fourth gear is meshed with the driving gear.

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