40.5 kV permanent magnet circuit breaker and manual opening device thereof

Abstract

The utility model aims to provide a manual opening device for a permanent magnet circuit breaker, and aims to overcome the defects of a traditional technical scheme. The utility model also provides a 40.5 kV permanent magnet circuit breaker. According to the specific technical scheme, the manual opening device for the permanent magnet circuit breaker comprises a plate support, a tripping plate, a tripping cover, a shaft support, a reset spring, a heavy cylindrical pin, a tripping shaft and a manual opening tool. Wherein the plate support and the shaft support are fixed on an upper end cover of the permanent magnetic mechanism; the tripping plate is connected with the plate support; the tripping cover is fixedly connected with the movable iron core transmission shaft; the tripping shaft is axially fixed through a shaft support; the reset spring and the heavy cylindrical pin are connected with the tripping shaft; and the manual opening tool is independently arranged and is connected with the tripping shaft when in use. Compared with the prior art, a complex transmission structure is removed, the requirement for consistency of parts is lowered, and the reliability of products is guaranteed; meanwhile, the manual opening device provided by the utility model is strong in applicability and can be compatible with more circuit breaker devices.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment - medium - voltage switch, and particularly relates to a 40.5kV circuit breaker and a manual tripping device. Background Art

[0002] In the field of medium - and high - voltage power transmission and distribution, switch cabinets are widely used, and circuit breakers are important switching elements in switch cabinets. There are spring - operated circuit breakers and permanent - magnet circuit breakers. However, there are significant differences in their mechanical life (the spring mechanism is generally 10,000 to 20,000 times, at most 30,000 times, while the life of the permanent - magnet mechanism is as high as 100,000 times). The permanent - magnet mechanism also has the advantages of fewer parts, maintenance - free, stable performance, and simple assembly. Since the permanent - magnet circuit breaker was used, the permanent - magnet mechanism has been widely used due to its simple structure, small volume, few moving parts, simple transmission, high reliability, low noise, stable opening and closing states, and almost no mechanical wear problems. As an important component of the switch cabinet, the circuit breaker controls the on - off of the high - voltage system. The manual tripping device is mainly used to cut off the circuit through manual operation under specific conditions.

[0003] The prior art discloses a permanent - magnet circuit breaker and its manual tripping device. This device realizes tripping by rotating the main shaft (the tripping toggle arm is lifted upward, and the main shaft rotates clockwise to realize tripping). The defect of this scheme is that the tripping force provided by this device is small and has high requirements for the hardness and thickness of the tripping toggle arm, and it can only be used for circuit breakers with small - current specifications. In addition, the prior art also discloses a manual tripping device for a permanent - magnet circuit breaker. This device realizes tripping by directly switching the auxiliary switch. The defect of this scheme is that there are too many parts and high requirements for the precision of the parts, which is inconvenient for assembly and has a high cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a manual tripping device for a permanent - magnet circuit breaker to improve the drawbacks of traditional technical solutions; it also provides a 40.5kV permanent - magnet circuit breaker. The specific technical solutions are as follows:

[0005] A manual tripping device for a permanent - magnet circuit breaker includes a plate support, a tripping plate, a tripping cover, a shaft support, a return spring, a heavy cylindrical pin, a tripping shaft, and a manual tripping tool. Among them, the plate support and the shaft support are fixed on the upper end cover of the permanent - magnet mechanism; the tripping plate is connected to the plate support; the tripping cover is fixedly connected to the moving iron core transmission shaft; the tripping shaft is axially fixed through the shaft support; the return spring and the heavy cylindrical pin are connected to the tripping shaft; the manual tripping tool is independently arranged and is connected to the tripping shaft during manual tripping operation.

[0006] Furthermore, the manual tripping device for the permanent - magnet circuit breaker further includes a pin. The tripping plate is connected to the plate support through the pin and can rotate with the pin as the fulcrum;

[0007] Further, the trip shaft is provided with a trip shaft eccentric cam, a hole and a manual opening end;

[0008] Further, the manual opening tool is provided with a manual opening structure, which is matched with the manual opening end;

[0009] Further, the heavy cylindrical pin is installed at the hole of the trip shaft;

[0010] Further, when in use, the manual opening tool is connected to the manual opening end of the manual opening tool.

[0011] A permanent magnet circuit breaker with a manual opening device includes a monostable permanent magnet mechanism, a main shaft, a frame, an insulating pull rod, a link transmission structure, and a closing spring. Among them, the main shaft is arranged in the frame, and the main shaft is provided with three-phase crank arms and a driving crank arm. One end of the link transmission structure is connected to the insulating pull rod, and the other end is connected to the three-phase crank arms. The monostable permanent magnet mechanism is fixed in the frame, and a moving iron core is installed in the monostable permanent magnet mechanism. The moving iron core is connected to the driving crank arm. One end of the closing spring is fixed on the frame, and one end is connected to the link transmission structure;

[0012] Further, the permanent magnet circuit breaker further includes a connecting rod, and the insulating pull rod and the link transmission structure are connected through the connecting rod;

[0013] Further, the permanent magnet circuit breaker further includes a manual opening device, which includes a pin, a plate support, a trip plate, a trip cover, a shaft support, a return spring, a heavy cylindrical pin, a trip shaft, a trip shaft eccentric cam, a hole, a manual opening end, a manual opening tool, and a manual opening structure. Among them, the plate support and the shaft support are fixed on the upper end cover of the permanent magnet mechanism; the trip plate is connected to the plate support; the trip cover is fixedly connected to the moving iron core transmission shaft; the trip shaft is axially fixed through the shaft support; the return spring and the heavy cylindrical pin are connected to the trip shaft; the manual opening tool is independently arranged, and when performing a manual opening operation, the manual opening tool is connected to the trip shaft.

[0014] Beneficial effects

[0015] 1) Compared with the prior art, the present utility model removes the complex transmission structure, reduces the high requirement for the consistency of parts, and ensures the reliability of the product;

[0016] 2) Compared with the prior art, the structure of the present utility model is simple, the number of parts is small, and the assembly is simple;

[0017] 3) The manual opening device provided by the present utility model has strong applicability and can be compatible with more circuit breaker devices. Description of the drawings

[0018] Figure 1It is a side view cross-sectional view of a permanent magnet circuit breaker

[0019] Figure 2 It is a schematic diagram of the opening state of the permanent magnet mechanism

[0020] Figure 3 It is a schematic diagram of the closing state of the permanent magnet mechanism

[0021] Figure 4-a It is a schematic diagram of the manual opening movement; Figure 4-b It is a component diagram of the manual opening device;

[0022] Figure 5 It is a characteristic diagram of the opening release shaft

[0023] Figure 6 It is a characteristic diagram of the manual opening tool

[0024] The markings in the figure are as follows:

[0025] 1 Permanent magnet mechanism, including 1-1 pole shoe, 1-2 upper end cover;

[0026] 2 Moving iron core assembly, including 2-1 moving iron core, 2-2 moving iron core transmission shaft;

[0027] 3 Link plate;

[0028] 4 Driving crank arm;

[0029] 5 Main shaft;

[0030] 6 Three-phase crank arm;

[0031] 7 Linkage drive structure;

[0032] 8 Opening spring;

[0033] 9 Connecting rod;

[0034] 10 Insulating pull rod;

[0035] 11 Solid-sealed pole column;

[0036] 12 Frame;

[0037] 13 Manual opening device, including 13-1 pin, 13-2 plate support, 13-3 release plate, 13-4 release cover, 13-5 shaft support, 13-6 return spring, 13-7 heavy-duty cylindrical pin, 13-8 release shaft, 13-8-1 release shaft eccentric cam, 13-8-2 hole, 13-8-3 manual opening end;

[0038] 14 is the moving direction of the 2 moving iron core assembly during closing;

[0039] 15 is the moving direction of the 13-3 release plate during opening;

[0040] 16 is the moving direction of the 2 moving iron core assembly during opening

[0041] 17 is the movement direction of the tripping shaft during manual opening;

[0042] 18 is a manual opening tool, and 18-1 is a manual opening structure. Specific embodiments

[0043] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] Embodiment 1

[0045] The present utility model provides a manual opening device for a permanent magnet circuit breaker. The structure and connection relationship of the device will be introduced below with reference to Figure 3 , 4-a , 4-b, 5, and 6:

[0046] The present utility model provides a manual opening device for a permanent magnet circuit breaker, mainly for achieving the purpose of cutting off the circuit through manual operation under specific conditions.

[0047] A manual opening device for a permanent magnet circuit breaker includes 13-1 pin, 13-2 plate support, 13-3 tripping plate, 13-4 tripping cover, 13-5 shaft support, 13-6 return spring, 13-7 heavy-duty cylindrical pin, 13-8 tripping shaft, 13-8-1 eccentric cam of the tripping shaft, 13-8-2 hole, 13-8-3 manual opening end, 18 manual opening tool, and 18-1 manual opening structure.

[0048] Among them, the 13-2 plate support and the 13-5 shaft support are fixed on the 1-2 upper end cover of the 1 permanent magnet mechanism;

[0049] The 13-3 tripping plate is connected to the 13-2 plate support through the 13-1 pin and can rotate with the 13-1 pin as the fulcrum;

[0050] The 13-4 tripping cover is fixed to the 2-2 moving iron core transmission shaft;

[0051] The 13-8 tripping shaft is axially fixed through the 13-5 shaft support. At the same time, the 13-8 tripping shaft is provided with a 13-8-1 eccentric cam of the tripping shaft, a 13-8-2 hole, and a 13-8-3 manual opening end;

[0052] The 13-6 return spring is installed on the 13-8 tripping shaft, and the 13-7 heavy-duty cylindrical pin is installed at the 13-8-2 hole. The self-reset of the 13-8 tripping shaft after each manual opening action is realized through the 13-6 return spring and the 13-7 heavy-duty cylindrical pin;

[0053] The 18 manual opening tool is provided with an 18-1 manual opening structure, which cooperates with the 13-8-3 manual opening end.

[0054] The following combines Figure 4-a , Figure 4-b , Figure 5 , 6 to introduce the process of manual opening.

[0055] In the closed state of the circuit breaker ( Figure 3 as shown), the 18 manual opening tool is inserted into the 13-8 tripping shaft and rotated clockwise (the movement direction of the tripping shaft during 17 manual opening). The 13-8-1 tripping shaft eccentric cam provided at the end of the 13-8 tripping shaft is lifted, driving the 13-3 tripping plate and the 13-4 tripping cover to lift (the movement direction of the 13-3 tripping plate during 15 opening). The 2-2 moving iron core transmission shaft is synchronously lifted because it is fixed to the 13-4 tripping cover (the movement direction of the 2 moving iron core assembly during 16 opening). The 2-1 moving iron core and the 1-1 pole shoe are separated (the closing state maintained by the permanent magnet attraction force is opened). At the same time, the 8 opening spring and the disc spring in the 10 insulating pull rod that complete energy storage during the closing process release energy, driving the 7 connecting rod transmission structure to move downward. Through the 9 connecting rod, the 10 insulating pull rod moves downward, and through the 10 insulating pull rod, the moving end and the static end of the vacuum arc extinguishing chamber in the 11 solid-sealed pole column are separated. Thus, the opening process is completed.

[0056] The 13-6 return spring is installed on the 13-8 tripping shaft, and the 13-7 heavy cylindrical pin is installed at the 13-8-2 hole. The self-return of the 13-8 tripping shaft after each manual opening action is realized through the 13-6 return spring and the 13-7 heavy cylindrical pin.

[0057] The present utility model provides a permanent magnet circuit breaker with a manual opening device. The following combines Figure 1 , 2 , 3, 4-a, 4-b, to introduce the structure and connection relationship of the device:

[0058] A permanent magnet circuit breaker with a manual opening device includes an 11 solid-sealed pole column and a circuit breaker operating mechanism. The 11 solid-sealed pole column and the circuit breaker operating mechanism are arranged vertically. The solid-sealed pole column is fixed on the frame, and the circuit breaker operating mechanism is installed inside the frame. The insulating pull rod of the solid-sealed pole column is connected to the connecting rod of the circuit breaker operating mechanism to realize the control of the solid-sealed pole column by the circuit breaker operating mechanism.

[0059] The circuit breaker operating mechanism includes a 13 manual opening device, a monostable permanent magnet mechanism, a 3 connecting plate, a 5 main shaft, a 4 driving crank arm, a 6 three-phase crank arm, a 7 connecting rod transmission structure, a 9 connecting rod, and an 8 opening spring.

[0060] The manual opening mechanism includes pin 13-1, plate support 13-2, release plate 13-3, release cover 13-4, shaft support 13-5, return spring 13-6, heavy-duty cylindrical pin 13-7, release shaft 13-8, eccentric cam 13-8-1 of the release shaft, hole 13-8-2, manual opening end 13-8-3, and manual opening tool 18. The 13 manual opening device is connected to the upper end of the monostable permanent magnet mechanism to achieve the purpose of cutting off the circuit through manual operation under specific conditions.

[0061] The monostable permanent magnet mechanism includes a permanent magnet mechanism and a moving iron core assembly. The permanent magnet mechanism includes a pole shoe 1-1 and an upper end cover 1-2, and the moving iron core assembly includes a moving iron core 2-1 and a moving iron core transmission shaft 2-2.

[0062] One end of the 3 connecting plate is pin-connected to the moving iron core transmission shaft 2-2, and the other end is pin-connected to the driving crank arm 4 of the 5 main shaft.

[0063] The 5 main shaft contains a driving crank arm 4 and a three-phase crank arm 6. The driving crank arm 4 is pin-connected to the 3 connecting plate, and the three-phase crank arm 6 is pin-connected to the 7 connecting rod transmission structure.

[0064] One end of the 7 connecting rod transmission structure is pin-connected to the three-phase crank arm 6 of the 5 main shaft, and the other end is connected to the 9 connecting rod.

[0065] One end of the 8 opening spring is connected to the frame through an opening hanging plate, and the other end is pin-connected to the connecting rod transmission structure.

[0066] The following combines Figure 1 、 2 、3 to introduce the electric closing process and the opening process.

[0067] Electric closing process: When the coil of the 1 permanent magnet mechanism is energized to generate a magnetic field, an attractive force is generated on the 2-1 moving iron core. The downward attractive force received by the 2 moving iron core assembly causes it to move downward. Through the 3 connecting plate, it drives the 4 driving crank arm and the 5 main shaft to rotate clockwise. Then, the three-phase crank arm 6 on the 5 main shaft rotates clockwise, driving the 7 connecting rod transmission structure to move upward. Through the 9 connecting rod, the 10 insulating pull rod moves upward simultaneously. The moving end and the static end of the vacuum interrupter in the 11 solid-sealed pole column are touched by the 10 insulating pull rod, and the closing state is maintained by the magnetic attraction force of the permanent magnet. Thus, the closing process is completed. It should be noted that during the closing process, the 8 opening spring is stretched, and the disc spring inside the 10 insulating pull rod is compressed, synchronously completing energy storage to prepare for opening.

[0068] Process of electrical opening: 1. The permanent magnet mechanism coil is energized to generate a magnetic field, which exerts a repulsive force on the 2-1 moving iron core. 2. The upward repulsive force received by the moving iron core assembly causes upward displacement. Through the 3 connecting plate, it drives the 4 driving crank arm and the 5 main shaft to rotate counterclockwise. Then, the 6 three-phase crank arm on the 5 main shaft rotates counterclockwise. At the same time, the energy stored during the closing process is released by the 8 opening spring and the disc spring in the 10 insulating pull rod, driving the 7 connecting rod transmission structure to move downward. Through the 9 connecting rod, the 10 insulating pull rod is driven to move downward. Through the 10 insulating pull rod, the moving end and the static end of the vacuum interrupter in the 11 solid-sealed pole column are separated. Thus, the opening process is completed.

Claims

1. A manual opening device for a 40.5kV permanent magnet circuit breaker, characterized in that: The manual tripping device for permanent magnetic circuit breaker comprises a plate support, a tripping plate, a tripping cover, a shaft support, a reset spring, a heavy cylindrical pin, a tripping shaft, and a manual tripping tool; wherein the plate support and the shaft support are fixed on the upper end cover of the permanent magnetic mechanism; the tripping plate is connected to the plate support; the tripping cover is connected and fixed to the driving shaft of the moving iron core; the tripping shaft is axially fixed by the shaft support; the reset spring and the heavy cylindrical pin are connected to the tripping shaft; the manual tripping tool is independently arranged, and the manual tripping tool is connected to the tripping shaft when the manual tripping operation is performed.

2. The manual opening device for a 40.5 kV permanent magnetic circuit breaker according to claim 1, characterized in that: The manual opening device for permanent magnetic circuit breaker also includes a pin; the trip plate is connected to the plate support through the pin.

3. The manual opening device for a 40.5 kV permanent magnetic circuit breaker according to claim 1, characterized in that: The tripping shaft is provided with a tripping shaft eccentric cam, a hole and a manual opening end.

4. The manual opening device for a 40.5 kV permanent magnetic circuit breaker according to claim 3, characterized in that: The heavy cylindrical pin is installed at the hole of the trip shaft.

5. The manual opening device for a 40.5 kV permanent magnetic circuit breaker according to claim 1, characterized in that: The manual opening tool is provided with a manual opening structure, and the manual opening structure cooperates with the manual opening end of the trip shaft.

6. A 40.5kV permanent magnet circuit breaker, characterized in that: The 40.5kV permanent magnet circuit breaker comprises a monostable permanent magnet mechanism, a main shaft, a frame, an insulating pull rod, a connecting rod transmission structure, and a trip spring; wherein the main shaft is arranged in the frame, a three-phase crank arm and a driving crank arm are arranged on the main shaft, one end of the connecting rod transmission structure is connected to the insulating pull rod, and the other end is connected to the three-phase crank arm, the monostable permanent magnet mechanism is fixed in the frame, a moving iron core is installed in the monostable permanent magnet mechanism, the moving iron core is connected to the driving crank arm, one end of the trip spring is fixed to the frame, and the other end is connected to the connecting rod transmission structure; The 40.5kV permanent magnetic circuit breaker further includes a connecting rod, and the insulating pull rod and the connecting rod transmission structure are connected by the connecting rod; The 40.5kV permanent magnetic circuit breaker also includes a manual tripping device, including a pin, a plate support, a tripping plate, a tripping cover, a shaft support, a reset spring, a heavy cylindrical pin, a tripping shaft, a tripping shaft eccentric cam, a hole, a manual tripping end, a manual tripping tool, and a manual tripping structure; Among them, the plate support and the shaft support are fixed on the upper end cover of the permanent magnet mechanism; the trip plate is connected to the plate support; the trip cover is connected and fixed to the moving iron core transmission shaft; the trip shaft is axially fixed through the shaft support; the reset spring and the heavy cylindrical pin are connected to the trip shaft; the manual trip tool is independently set, and the manual trip tool is connected to the trip shaft when performing manual trip operation.

Images