An emergency opening device for a center gate circuit breaker

Abstract

The utility model provides a kind of middle door circuit breaker emergency opening device, it is related to circuit breaker technical field, including: switch board, knob rotationally arranged in cabinet door, transmission lever and transmission assembly.The transmission assembly is linked by mounting seat, displacement rack, main drive gear, driven gear and segmented lifting arm, the rotary motion of knob is converted into the vertical lifting action of lifting arm, and drive switch blade switching rod triggers opening;The segmented lifting arm top end is provided with switch blade switching rod with silicon rubber elastic buffer sheet, and impact force is dispersed by arc recessed contact surface;Insulating isolation ring is additionally provided at knob connection, to ensure high-voltage operation safety.The utility model solves the problems of low transmission efficiency, large operating torque, easily damaged components by opening impact and insufficient insulation protection in high-voltage environment of traditional emergency opening device, realizes single-hand operation quick opening, and reduces mechanical wear and tear and risk of accidental touch.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an emergency tripping device for a middle-door circuit breaker. Background Technology

[0002] In power systems, intermediate-gate circuit breakers are critical equipment for ensuring circuit safety, and their stable operation is of paramount importance. Currently, the tripping devices of some intermediate-gate circuit breakers rely on traditional electric control or complex mechanical interlocking structures. However, in emergency situations such as power outages or control system failures, existing tripping devices cannot quickly and reliably achieve emergency tripping, potentially leading to power accidents.

[0003] A Chinese patent with publication number CN222168304U discloses a reliable remote control tripping device for circuit breakers. The device includes a circuit breaker body, a switch and a base frame, a drive mechanism, a connecting rod, a deflecting rod, a worm gear transmission assembly, a limit plate and an arc-shaped groove, a connecting mechanism, a fixing hole, a fixing rod, and a return spring. It achieves switching between electric and manual modes through a mechanical locking structure. After the drive motor starts, the worm gear rotates, driving the worm wheel and deflecting rod to rotate, which in turn drives the switch to move within the arc-shaped groove via the connecting rod, completing the tripping or closing action. In manual mode, the fixing rod is unlocked by pulling a plate, disconnecting the electric connection and allowing direct manual operation of the switch. This solution emphasizes intelligent remote control and is suitable for routine tripping needs. While the worm gear transmission has self-locking characteristics, it requires greater torque. In emergency tripping scenarios, the longer transmission chain affects response speed. The spring-return fixing rod is prone to jamming in humid / dusty environments, making one-handed operation inconvenient. In emergencies, if the connection cannot be released in time, manual operation will be lost, and the impact of tripping can easily damage components.

[0004] In response to the aforementioned technologies, an emergency tripping device for a middle-gate circuit breaker is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] This utility model proposes an emergency tripping device for a central-gate circuit breaker, which solves the problems of low transmission efficiency, large operating torque, easily damaged components due to tripping impact, and insufficient insulation protection under high-voltage conditions in traditional emergency tripping devices.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an emergency tripping device for a middle-door circuit breaker, comprising: a distribution cabinet, the distribution cabinet being composed of a cabinet door and a cabinet body, a knob being rotatably mounted on the cabinet door, a transmission lever being fixedly mounted on the other end of the knob extending into the cabinet door, the driving end of the transmission lever being at a 45-degree angle, and a transmission component for opening and closing the circuit breaker switch being periodically abutted on the transmission lever, the transmission component being fixedly mounted on the cabinet body;

[0007] The transmission assembly includes a mounting base, a displacement rack, a main drive gear, a driven gear, and a segmented lifting arm. The mounting base is fixedly positioned in the middle of the cabinet, corresponding to the knob on the cabinet door. A limit groove is provided at the bottom of the mounting base, and a displacement rack is slidably connected to the limit groove. A transmission linkage is fixedly installed on the middle of the side wall of the displacement rack near the cabinet door. The transmission linkage periodically abuts against the transmission lever. A main drive gear is meshed on the displacement rack. A driven gear is meshed on one side of the main drive gear. A segmented lifting arm is meshed on one side of the driven gear. A toothed transmission belt is fixedly installed on the side wall of the segmented lifting arm near the driven gear. Two switch rods are fixedly installed at intervals at the top of the segmented lifting arm. The two switch rods are located between the circuit breaker switches. An elastic buffer is provided at the contact end of the switch rod. The switch rods periodically abut against the circuit breaker switches to trigger the tripping action.

[0008] Furthermore, an insulating isolation ring is fitted at the connection between the knob and the cabinet door. The insulating isolation ring has a withstand voltage rating of not less than 10 kilovolts and has anti-slip texture on its outer surface.

[0009] Furthermore, the contact stroke between the transmission linkage and the transmission lever corresponds to the rotation angle of the knob from zero to ninety degrees, and the displacement of the transmission linkage is constrained by the length of the limiting groove.

[0010] Furthermore, both the main drive gear and the driven gear are rotatably connected to the mounting base via bearings.

[0011] Furthermore, a guide groove is provided at one end of the mounting base near the segmented lifting arm, the segmented lifting arm moves vertically along the guide groove, the inner wall of the guide groove is provided with a self-lubricating coating, and a limit stop is provided at the end of the segmented lifting arm.

[0012] Furthermore, the thickness of the elastic buffer sheet is two to five millimeters, and it is made of silicone rubber. The contact surface between the elastic buffer sheet and the circuit breaker switch is an arc-shaped concave structure.

[0013] Compared with existing technologies, the beneficial effects of this utility model include: by optimizing the torque transmission path of the transmission lever at a 45-degree angle, combined with the torque amplification design of the double-stage gear set (main transmission gear and driven gear), the operating force is significantly reduced and the transmission efficiency is improved; the segmented lifting arm rises and falls vertically along the guide groove, and the self-lubricating coating reduces friction loss, ensuring the linear accuracy of the opening action; the silicone rubber material of the elastic buffer sheet and the arc-shaped concave contact surface effectively absorb the impact force of the opening and reduce the wear of the switch knife; the 10kV withstand voltage insulating isolation ring and the anti-slip textured knob take into account both the safety of high-voltage environments and the stability of operation; the limit groove and the stroke constraint mechanism are linked for control, avoiding overload damage and extending the service life of the device. The overall structure is compact and suitable for compact switch cabinets, achieving fast and reliable manual emergency opening without modifying the cabinet. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0015] Figure 1 The diagram schematically shows the external structure of the emergency tripping device for a middle-door circuit breaker according to one embodiment of the present invention.

[0016] Figure 2 The diagram schematically shows the internal structure of the emergency tripping device for a circuit breaker according to one embodiment of the present invention.

[0017] Figure 3 The schematic diagram shows a structural schematic of a transmission assembly according to one embodiment of the present invention.

[0018] Figure 4 The diagram schematically illustrates the positional structure of the knob and transmission assembly according to one embodiment of the present invention.

[0019] The following are the labels in the diagram: 1. Distribution cabinet; 11. Cabinet door; 12. Cabinet body; 2. Knob; 21. Transmission lever; 3. Transmission assembly; 31. Mounting base; 32. Displacement rack; 33. Main transmission gear; 34. Driven gear; 35. Segmented lifting arm; 310. Limit groove; 321. Transmission linkage; 352. Switch rod; 3521. Elastic buffer plate; 22. Insulating isolation ring; 350. Guide groove; 351. Toothed transmission belt. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0021] According to one embodiment of the present invention, in conjunction with Figures 1-4 As shown. An emergency tripping device for a circuit breaker with a central door includes: a distribution cabinet 1, which consists of a cabinet door 11 and a cabinet body 12. A knob 2 is rotatably mounted on the cabinet door 11. A transmission lever 21 is fixedly mounted on the other end of the knob 2 that extends into the cabinet door 11. The driving end of the transmission lever 21 is at a 45-degree angle. By optimizing the torque transmission path, the operating force is reduced and the transmission efficiency is improved. A transmission component 3 for opening and closing the circuit breaker switch is periodically abutted on the transmission lever 21. The transmission component 3 is fixedly mounted on the cabinet body 12.

[0022] The transmission assembly 3 includes a mounting base 31, a displacement rack 32, a main drive gear 33, a driven gear 34, and a segmented lifting arm 35. The mounting base 31 is fixedly installed in the middle of the cabinet 12, corresponding to the position of the knob 2 on the cabinet door 11. A limit groove 310 is opened at the bottom of the mounting base 31. The linear motion accuracy of the displacement rack 32 is ensured by sliding limit. The displacement rack 32 is slidably connected to the limit groove 310. A transmission connecting rod 321 is fixedly installed in the middle of the side wall of the displacement rack 32 near the cabinet door 11. The transmission connecting rod 321 periodically abuts against the transmission lever 21. The periodic action design avoids mechanical jamming and improves the response speed. The main drive gear 33 is meshed on the displacement rack 32. The driven gear 34 is meshed on one side of the main drive gear 33. The double-stage gear transmission amplifies the torque and ensures the rapid triggering of the opening action. The main drive gear 33 and the driven gear 34 are rotatably connected to the mounting base 31 through bearings, which reduces the friction loss of the gear transmission and improves the transmission efficiency.

[0023] A segmented lifting arm 35 is meshed with one side of the driven gear 34. A toothed transmission belt 351 is fixedly installed on the side wall of the segmented lifting arm 35 near the driven gear 34. The flexible transmission reduces gear impact and extends the service life of the components.

[0024] Two switch rods 352 are fixedly installed at a distance from the top of the segmented lifting arm 35. These two switch rods 352 are located between the circuit breaker switches. An elastic buffer plate 3521 is installed at the contact end of each switch rod 352. Made of silicone rubber with an arc-shaped concave contact surface, this buffer reduces the impact of tripping and prevents wear on the circuit breaker switches. The switch rods 352 periodically contact the circuit breaker switches to trigger the tripping action. The elastic buffer plate 3521 has a thickness of 2mm-5mm to adapt to different tripping pressure requirements, enhancing versatility. Made of silicone rubber, the contact surface between the elastic buffer plate 3521 and the circuit breaker switches has an arc-shaped concave structure, which disperses the impact force through surface deformation, reducing tripping vibration noise. The mounting base 31 has a guide groove 350 at one end near the segmented lifting arm 35. The segmented lifting arm 35 moves vertically along the guide groove 350. The vertical guide design ensures the straightness of the lifting trajectory. The inner wall of the guide groove 350 is provided with a self-lubricating coating to reduce lifting resistance and extend the service life of the guide groove 350. The end of the segmented lifting arm 35 is provided with a limit stop to prevent the lifting stroke from exceeding the limit and ensure the reliability of the operation.

[0025] An insulating isolation ring 22 is fitted at the connection between the knob 2 and the cabinet door 11. The withstand voltage of the insulating isolation ring 22 is not less than 10kV, which ensures the safety of operation under high voltage environment. The outer surface is provided with anti-slip texture to enhance the grip stability of the knob 2 and prevent slippage during operation.

[0026] The contact stroke of the transmission linkage 321 and the transmission lever 21 corresponds to the rotation angle of the knob 2 from 0° to 90°. Precise mechanical linkage control is achieved through angle constraint. The displacement of the transmission linkage 321 is constrained by the length of the limiting groove 310, limiting the maximum displacement range and preventing overload damage to components.

[0027] In this embodiment, when the operator rotates the knob 2, the transmission lever 21 fixed at its end rotates at a 45-degree angle, periodically abutting against the transmission coupling rod 321 in the transmission assembly 3. The transmission coupling rod 321 drives the displacement rack 32 to slide horizontally along the limiting groove 310 of the mounting base 31. The limiting groove 310 precisely constrains the rack displacement by its length, ensuring that the stroke corresponds to the rotation angle of the knob 2 from 0° to 90°. The linear motion of the displacement rack 32 is converted into rotational motion by the meshing main transmission gear 33, and then the torque is amplified by the driven gear 34 with a gear ratio of 1:2. Finally, the segmented lifting arm 35 is driven vertically up and down along the guide groove 350 by the toothed transmission belt 351. The self-lubricating coating on the inner wall of the guide groove 350 significantly reduces friction loss. The double-knife switch lever 352 at the top of the lifting arm, with the aid of an elastic buffer plate 3521, uses its 2mm-5mm silicone rubber material and arc-shaped concave contact surface to abut against the circuit breaker knife. The downward pressure of the knife switch lever 352 is precisely controlled by the limit stop at the end of the lifting stroke, achieving forced opening. Through the cooperation of the mechanical transmission chain, from knob 2 → transmission lever 21 → displacement rack 32 → gear set → segmented lifting arm 35 → knife switch lever 352, reliable triggering of emergency opening action is achieved. At the same time, the insulating isolation ring 22, with a withstand voltage of 10kV, ensures operational safety.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An emergency tripping device for a middle-gate circuit breaker, characterized in that, include: The distribution cabinet (1) includes a cabinet door (11) and a cabinet body (12). The cabinet door (11) and the cabinet body (12) are rotatably connected. A knob (2) is rotatably connected to the cabinet door (11). A transmission lever (21) is fixedly installed at the other end of the knob (2) that extends into the cabinet door (11). The driving end of the transmission lever (21) is at a 45-degree angle. A transmission assembly (3) for opening and closing circuit breaker switches is periodically abutted on the transmission lever (21). The transmission assembly (3) is fixedly installed on the cabinet body (12). The transmission assembly (3) includes a mounting base (31), a displacement rack (32), a main transmission gear (33), a driven gear (34), and a segmented lifting arm (35). The mounting base (31) is fixedly installed in the middle of the cabinet (12) at the position of the knob (2) on the cabinet door (11). A limit groove (310) is opened at the bottom of the mounting base (31). The displacement rack (32) is slidably connected to the limit groove (310). A transmission connecting rod (321) is fixedly installed in the middle of the side wall of the displacement rack (32) near the cabinet door (11). The transmission connecting rod (321) periodically abuts against the transmission lever (21). The main transmission gear (33) is meshed on the displacement rack (32). A driven gear is meshed on one side of the main transmission gear (33). 34) The main drive gear (33) and the driven gear (34) are rotatably connected to the mounting base (31) through bearings. A segmented lifting arm (35) is meshed with one side of the driven gear (34). A toothed transmission belt (351) is fixedly installed on the side wall of the segmented lifting arm (35) near the driven gear (34). The toothed transmission belt (351) meshes with the driven gear (34). Two knife switch rods (352) are fixedly installed at intervals at the top of the segmented lifting arm (35). The two knife switch rods (352) are located between the circuit breaker knife switches. An elastic buffer plate (3521) is provided at the contact end of the knife switch rod (352). The knife switch rod (352) periodically abuts against the circuit breaker knife switch to trigger the tripping action.

2. The emergency tripping device for the middle-gate circuit breaker according to claim 1, characterized in that, An insulating isolation ring (22) is fitted at the connection between the knob (2) and the cabinet door (11). The insulating isolation ring (22) has a withstand voltage rating of not less than 10kV and an anti-slip texture on its outer surface.

3. The emergency tripping device for the middle-gate circuit breaker according to claim 1, characterized in that, The contact stroke between the transmission linkage (321) and the transmission lever (21) corresponds to the rotation angle of the knob (2) from 0° to 90°, and the displacement of the transmission linkage (321) is constrained by the length of the limiting groove (310).

4. The emergency tripping device for the intermediate-gate circuit breaker according to claim 1, characterized in that, The mounting base (31) has a guide groove (350) at one end near the segmented lifting arm (35). The segmented lifting arm (35) moves vertically along the guide groove (350). The inner wall of the guide groove (350) is provided with a self-lubricating coating. The end of the segmented lifting arm (35) is provided with a limiting block.

5. The emergency tripping device for the intermediate-gate circuit breaker according to claim 1, characterized in that, The thickness of the elastic buffer sheet (3521) is 2mm-5mm, and the contact surface between the elastic buffer sheet (3521) and the circuit breaker switch is an arc-shaped concave structure.

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