A ring main unit circuit breaker capable of fast closing and opening and a method thereof

Abstract

The application belongs to the technical field of ring main unit circuit breaker, and particularly relates to a ring main unit circuit breaker capable of quickly closing and opening and a method thereof. The ring main unit circuit breaker comprises a circuit breaker cabinet body, the side wall of the circuit breaker cabinet body is fixedly connected with track grooves in a symmetrical manner, a wiring post module and a control module are slidably connected between the two track grooves, a busbar module is fixedly connected inside the circuit breaker cabinet body, the busbar module comprises an upper busbar module and a lower busbar module, the upper busbar module and the lower busbar module are connected and disconnected through the sliding of the wiring post module, the control module and the wiring post module are fixedly connected through a plurality of force storage springs, a limiting groove is formed in the bottom of the wiring post module, and a limiting mechanism is installed at the bottom of the circuit breaker cabinet body. Through the cooperation of the control module and the limiting mechanism, the ring main unit circuit breaker can not only quickly close and open to prevent the generation of electric arc caused by unstable connection, but also effectively protect the busbar and the wiring post contact from being damaged, and can prevent accidental touch.

Description

Technical Field

[0001] This invention belongs to the technical field of ring main unit circuit breakers, specifically relating to a ring main unit circuit breaker and method capable of rapid closing and opening. Background Technology

[0002] A ring main unit (RMU) circuit breaker is a protection and control device used in power distribution systems, primarily in ring network power supply systems. It typically integrates circuit breakers, load switches, disconnect switches, and protection and measurement devices, automatically disconnecting the circuit in the event of short circuits, overloads, or other faults to protect equipment and personnel. RMUs aim to improve power supply reliability, ensuring that a fault in one part does not affect the power supply to other parts, and enabling flexible switching of the ring network structure, thereby optimizing power distribution and fault handling processes.

[0003] Chinese patent application number 202311817241.0 discloses a switch interlocking mechanism for a ring main unit circuit breaker. The mechanism includes a ring main unit, with a circuit breaker installed inside. Several junction boxes are mounted on the circuit breaker, and several rotatable conductive gates are also mounted on it, each facing one of the junction boxes. A switch interlocking structure is provided on the circuit breaker, through which the conductive gates rotate. The switch interlocking structure consists of several linkages. This patent uses graphite blocks as the friction lubricant material, utilizing the powdered graphite produced during friction to form a lubricating film, reducing friction and wear. This helps reduce the friction between the pin, the first movable part, and the second movable part, preventing the switch interlocking structure from jamming and ensuring its smooth operation.

[0004] When closing or opening a ring main unit circuit breaker, if the closing or opening cannot be performed quickly, it can lead to unstable connections and electric arcs, thus creating safety hazards. At the same time, for some devices that can close or open quickly, the force cannot be effectively controlled, which can cause wear and damage to the busbar and terminal contacts due to excessive impact over time. Excessive contact pressure from some closing and opening devices can also easily lead to wear problems. Furthermore, after closing or opening, the switching equipment is prone to accidental activation, which can cause the closing or opening to fail. Complex locking devices are usually required to prevent accidental activation, which further increases the difficulty of operating the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a ring main unit circuit breaker capable of rapid closing and opening. Through the cooperation of a control module and a limit mechanism, this invention not only enables rapid closing and opening to prevent arcing caused by unstable connections, but also effectively protects the busbars and terminal contacts from damage and prevents accidental contact.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A ring main unit circuit breaker capable of rapid closing and opening includes a circuit breaker cabinet. The side walls of the circuit breaker cabinet are symmetrically and fixedly connected with rail grooves. A terminal block module and a control module are slidably connected between two rail grooves. A busbar module, including an upper busbar module and a lower busbar module, is fixedly connected inside the circuit breaker cabinet. The upper and lower busbar modules are connected and disconnected by sliding the terminal block modules. The control module is fixedly connected to the terminal block modules via multiple energy storage springs. A limit groove is formed at the bottom of each terminal block module, and a limit mechanism is installed at the bottom of the circuit breaker cabinet.

[0007] Furthermore, the control module includes a control vertical plate and a control horizontal plate connected to each other; the bottom two ends of the control vertical plate are fixedly provided with first sliders, which are slidably connected to the track groove; a threaded hole is opened through the middle of the bottom of the control vertical plate, and the threaded hole is threadedly connected to the control screw; a control slot is opened through the control horizontal plate, and the two ends of the control slot are set as guide slopes.

[0008] Furthermore, the limiting mechanism includes a straight guide block, an inclined guide block, and a straight limiting block that are fixedly connected in sequence; a base plate is fixedly provided at the bottom of the circuit breaker cabinet, and telescopic openings are symmetrically provided on the base plate, with a receiving box fixedly connected to the bottom of the telescopic openings; the bottom of the receiving box is fixedly connected to the straight guide block through a return spring; the straight guide block is slidably connected to the receiving box; and the limiting mechanism is located between the control slots.

[0009] Furthermore, when the terminal block module is connected to the busbar module and the circuit is closed, the limit mechanism limits the control slot.

[0010] Furthermore, when the reset spring is in its normal state, the top of the direct limit block is higher than the bottom of the terminal block module.

[0011] Furthermore, it also includes a motor cabinet, which is fixed to one side of the circuit breaker cabinet. A forward and reverse motor is fixedly installed inside the motor cabinet, and the output end of the forward and reverse motor passes through the circuit breaker cabinet and is fixedly connected to the control screw.

[0012] Furthermore, it also includes a control cabinet, which is fixed to the bottom of the circuit breaker cabinet.

[0013] Furthermore, the upper busbar module and the lower busbar module have the same structure. The upper busbar module includes a busbar box, and the two ends of the busbar box are fixedly connected to the circuit breaker cabinet through brackets. The top of the busbar box is provided with multiple busbar slots, and busbar contact plates are fixedly inserted into the busbar slots. Multiple insulating cylinders are fixedly connected to one side of the busbar box, and the insulating cylinders are fixedly connected to the busbar slots.

[0014] Furthermore, the terminal block module includes a vertical terminal block and a horizontal terminal block connected to each other. Second sliders are fixedly provided on both sides of the horizontal terminal block, and the second sliders are slidably connected to the track groove. The energy storage spring is fixedly connected to the vertical terminal block. A limiting groove is formed at the bottom of the horizontal terminal block, and a clearance hole is formed through the middle of the horizontal terminal block. Multiple mounting cylinders are fixedly connected to the top of the horizontal terminal block, and two second insulating cylinders are fixedly connected to the side walls of the mounting cylinders. C-shaped terminal block bodies are fixedly installed inside the mounting cylinders and the second insulating cylinders.

[0015] This invention also claims a method for operating a ring main unit circuit breaker capable of rapid closing and opening, comprising the following steps: S1. When closing the circuit, the control module is moved by the control screw. Under the connection of the storage spring, the control module and the terminal module move towards the busbar module synchronously. S2. The terminal module is first stopped by the straight limit block on one side; then, as the control module continues to move, the energy storage spring is compressed and stores energy while the control slot approaches the limit mechanism; the guide slope moves laterally and drives the inclined guide block to descend, so that the limit mechanism releases the limit on the terminal module; after the limit is released, the energy storage spring returns to its original state and the terminal module is quickly connected to the busbar module for closing. S3. After closing the circuit, the control screw is reversed to move one end of the control slot away from the limit mechanism. At this time, the limit mechanism is reset and inserted into the limit slot to limit the terminal module. S4. When the circuit breaker is tripped, the control screw continues to reverse, causing the control module to move away from the busbar module. At this time, the storage spring is stretched and stores energy, while the other end of the control slot approaches the limit mechanism. The guide ramp at the other end moves laterally and drives the ramp guide block to descend, causing the limit mechanism to release the limit on the corresponding terminal module. After the limit is released, the storage spring returns to its original state and the corresponding terminal module is quickly disconnected from the busbar module.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the cooperation of a control module and a limiting mechanism, not only enables rapid closing and opening of the circuit breaker to prevent arcing caused by unstable connections, but also effectively protects the busbar and terminal contacts from damage and prevents accidental contact. Specifically, when closing the circuit breaker, rotating the control screw causes the control module's first slider to slide against the track groove and its threaded hole to be threadedly connected to the control screw, thus moving the control module laterally closer to the busbar module. Simultaneously, the terminal module, connected by a storage spring, also moves closer to the busbar module. At this point, one side of the terminal module first abuts against the straight-face limiting block and is limited, while the terminal module and the busbar... The distance between the busbar modules is effectively shortened, thus preventing significant impact forces during subsequent rapid connection and closing, effectively protecting the connection contacts of the terminal block module and the busbar module. As the control module continues to move, the energy storage spring is compressed and stores energy, while one end of the control slot simultaneously approaches the limit mechanism. At this point, the lateral movement of the guide ramp squeezes the guide block and causes it to descend. After the control module moves a certain distance, the limit mechanism automatically releases the limit on the terminal block module. Once the limit is released, because the energy storage spring is compressed, it returns to its original state and quickly pushes the terminal block module... The system allows the terminal block module to quickly connect and close with the busbar module, preventing arcing caused by unstable connection. Since the distance between the terminal block module and the busbar module is automatically and effectively shortened before rapid closing, no significant impact force is generated during the closing process, effectively protecting the connection contacts of the terminal block module and the busbar module. Furthermore, after closing, the control screw reverses, moving one end of the control slot away from the limit mechanism. At this time, the limit mechanism resets and inserts into the limit slot to limit the terminal block module. After limiting, the closed state is stably maintained without requiring limit maintenance on the control screw, thus preventing closing failure caused by external accidental contact. While unstable, it can also loosen the accumulator spring to a certain extent, avoiding wear caused by excessive resistance of the accumulator spring, thus effectively protecting the busbar and terminal contacts from damage. When tripping, the control screw continues to reverse, driving the control module away from the busbar module. At this time, the accumulator spring is stretched and accumulating force, while the other end of the control slot approaches the limit mechanism. The guide ramp at the other end moves laterally and drives the ramp guide block to descend, causing the limit mechanism to release the limit on the terminal module. After the limit is released, the accumulator spring can also quickly disconnect the terminal module from the busbar module through its own restoring force. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention. Figure 2 This is a schematic diagram of the distributed structure of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention; Figure 3This is a schematic diagram of the internal structure of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention. Figure 4 This is a schematic diagram of the distributed structure of the busbar module of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention; Figure 5 This is a schematic diagram of the terminal block module structure of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention; Figure 6 This is a schematic diagram of the control module structure of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention; Figure 7 This is a schematic diagram of the distributed structure of the limiting mechanism of a ring main unit circuit breaker capable of rapid closing and opening according to the present invention.

[0018] The attached figures are labeled as follows: Circuit breaker cabinet-100, base plate-110, telescopic port-111, housing box-120, track groove-130, control cabinet-200, motor cabinet-300, busbar module-400, upper busbar module-410, busbar box-411, bracket-412, busbar groove-413, insulating cylinder-414, busbar contact plate-415, lower busbar module-420, terminal block module-500, mounting cylinder-510, second insulating cylinder-511, C-type terminal block body-520, terminal block cross plate-53 0, Second slider - 531, Limiting groove - 532, Clearing hole - 533, Wiring vertical plate - 540, Control module - 600, Control vertical plate - 610, First slider - 611, Threaded hole - 612, Energy storage spring - 620, Control horizontal plate - 630, Control slot - 640, Guide slope - 641, Forward and reverse motor - 700, Control screw - 710, Limiting mechanism - 800, Straight guide block - 810, Sloping guide block - 820, Straight limit block - 830, Reset spring - 840. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items. Example

[0021] like Figures 1-7As shown, a ring main unit circuit breaker capable of rapid closing and opening includes a circuit breaker cabinet 100. The side walls of the circuit breaker cabinet 100 are symmetrically and fixedly connected with track grooves 130. A terminal block module 500 and a control module 600 are slidably connected between two track grooves 130. A busbar module 400 is fixedly connected inside the circuit breaker cabinet 100. The busbar module 400 includes an upper busbar module 410 and a lower busbar module 420. The upper busbar module 410 and the lower busbar module 420 are connected and disconnected by sliding the terminal block module 500. The control module 600 is fixedly connected to the terminal block module 500 by multiple energy storage springs 620. A limit groove 532 is formed at the bottom of the terminal block module 500, and a limit mechanism 800 is installed at the bottom of the circuit breaker cabinet 100.

[0022] This invention, through the cooperation of the control module 600 and the limit mechanism 800, can not only quickly close and open the circuit breaker to prevent the generation of electric arcs caused by unstable connections, but also effectively protect the busbar and terminal contacts from damage and prevent accidental contact; a detailed description will follow.

[0023] Furthermore, the control module 600 includes a control vertical plate 610 and a control horizontal plate 630 connected to each other; the control vertical plate 610 has a first slider 611 fixed at both ends of its bottom, and the first slider 611 is slidably connected to the track groove 130; a threaded hole 612 is provided through the middle of the bottom of the control vertical plate 610, and the threaded hole 612 is threadedly connected to the control screw 710; a control slot 640 is provided through the control horizontal plate 630, and the two ends of the control slot 640 are provided as guide slopes 641.

[0024] Furthermore, the limiting mechanism 800 includes a straight guide block 810, an inclined guide block 820, and a straight limiting block 830 that are fixedly connected in sequence; a base plate 110 is fixedly provided at the bottom of the circuit breaker cabinet 100, and telescopic openings 111 are symmetrically provided on the base plate 110, with a receiving box 120 fixedly connected to the bottom of the telescopic openings 111; the bottom of the receiving box 120 is fixedly connected to the straight guide block 810 through a return spring 840; the straight guide block 810 is slidably connected to the receiving box 120; and the limiting mechanism 800 is located between the control slots 640.

[0025] When the circuit breaker is closed, the control screw 710 is rotated. Since the first slider 611 of the control module 600 is slidably connected to the track groove 130 and the threaded hole 612 is threadedly connected to the control screw 710, the control module 600 can move laterally closer to the busbar module 400. Simultaneously, the terminal block module 500, connected by the storage spring 620, also moves closer to the busbar module 400. At this time, one side of the terminal block module 500 first abuts against the straight-face limiting block 830 and is limited, effectively shortening the distance between the terminal block module 500 and the busbar module 400. This prevents a large impact force during the subsequent rapid connection and closing process, effectively protecting the terminal block module 500 and the busbar module 400. The connection contacts of the busbar module 400 are then moved. As the control module 600 continues to move, the energy storage spring 620 is compressed and stores energy, while one end of the control slot 640 simultaneously approaches the limit mechanism 800. At this time, the guide ramp 641 moves laterally, squeezing the ramp guide block 820 and causing it to descend. After the control module 600 moves a certain distance, the limit mechanism 800 automatically releases the limit on the terminal block module 500. Once the limit is released, because the energy storage spring 620 is compressed, it will return to its original state and quickly push the terminal block module 500, causing the terminal block module 500 to quickly connect and close with the busbar module 400, thus preventing unstable connections. This leads to the generation of an electric arc. Since the distance between the terminal module 500 and the busbar module 400 is automatically and effectively shortened before rapid closing, no large impact force is generated during the closing process, effectively protecting the connection contacts of the terminal module 500 and the busbar module 400. Furthermore, after closing, the control screw 710 reverses, causing one end of the control slot 640 to move away from the limit mechanism 800. At this time, the limit mechanism 800 resets and inserts into the limit slot 532 to limit the terminal module 500. After limiting, the closed state can be stably maintained without needing to limit the control screw 710. This prevents closing failure and instability caused by external accidental contact and also allows for some release of the storage spring 620. The operation avoids excessive contact force of the accumulator spring 620, which could lead to wear and tear, thus effectively protecting the busbar and terminal contacts from damage. When the circuit is tripped, the control screw 710 continues to reverse, causing the control module 600 to move away from the busbar module 400. At this time, the accumulator spring 620 is stretched and accumulating force, while the other end of the control slot 640 approaches the limit mechanism 800. The guide ramp 641 at the other end moves laterally and causes the ramp guide block 820 to descend, causing the limit mechanism 800 to release the limit on the terminal module 500. After the limit is released, the accumulator spring 620 can also quickly disconnect the terminal module 500 from the busbar module 400 through its own restoring force.

[0026] Furthermore, when the terminal block module 500 is connected to the busbar module 400 and the circuit is closed, the limit mechanism 800 limits the control slot 640.

[0027] It is worth noting that after the control screw 710 is reversed after the circuit is closed, and the control slot 640 is released from the limit mechanism 800, the limit mechanism 800 can be reset and limit the control slot 640 by inserting its end into the control slot 640; thus, the size ratio for achieving the limit is limited.

[0028] Furthermore, when the reset spring 840 is in its normal state, the top of the direct limit block 830 is higher than the bottom of the terminal block module 500.

[0029] It is worth noting that by setting this size ratio, the vertical face of the straight face limit block 830 can be used to limit the horizontal movement of the terminal module 500.

[0030] Furthermore, it also includes a motor cabinet 300, which is fixed to one side of the circuit breaker cabinet 100. A forward and reverse motor 700 is fixedly installed inside the motor cabinet 300. The output end of the forward and reverse motor 700 passes through the circuit breaker cabinet 100 and is fixedly connected to the control screw 710.

[0031] It is worth noting that the forward and reverse motor 700 is one of the ways to drive the control screw 710. The forward and reverse motor 700 can rotate forward by a certain angle or in the reverse direction by a certain angle. It is powered by an external power source and is a mature technology that will not be described in detail here.

[0032] Furthermore, it also includes a control cabinet 200, which is fixed to the bottom of the circuit breaker cabinet 100.

[0033] It is worth noting that the control cabinet 200 in this application is a reserved cabinet for ring main unit, which can be used to install other control structures. In addition, all cabinets in this application are part of the structure of ring main unit, and will not be described in detail here.

[0034] Furthermore, the upper busbar module 410 and the lower busbar module 420 have the same structure. The upper busbar module 410 includes a busbar box 411, and the two ends of the busbar box 411 are fixedly connected to the circuit breaker cabinet 100 through brackets 412. The top of the busbar box 411 is provided with multiple busbar slots 413, and busbar contact plates 415 are fixedly inserted into the busbar slots 413. Multiple insulating cylinders 414 are fixedly connected to one side of the busbar box 411, and the insulating cylinders 414 are fixedly connected to the busbar slots 413.

[0035] The insulating cylinder 414 can effectively prevent electric arc. The busbar contact plate 415 of the upper busbar module 410 and the lower busbar module 420 are connected and energized through the terminal module 500 to realize the closing. The external power connection method of the busbar contact plate 415 can be set in a conventional way, and will not be described in detail in the instruction manual and the accompanying drawings.

[0036] Furthermore, the terminal block module 500 includes a vertical terminal block 540 and a horizontal terminal block 530 connected to each other. Second sliders 531 are fixedly provided on both sides of the horizontal terminal block 530, and the second sliders 531 are slidably connected to the track groove 130. The energy storage spring 620 is fixedly connected to the vertical terminal block 540. The limiting groove 532 is opened at the bottom of the horizontal terminal block 530, and a clearance hole 533 is opened through the middle of the horizontal terminal block 530. Multiple mounting cylinders 510 are fixedly connected to the top of the horizontal terminal block 530. Two second insulating cylinders 511 are fixedly connected to the side walls of the mounting cylinders 510. C-shaped terminal block bodies 520 are fixedly installed inside the mounting cylinders 510 and the second insulating cylinders 511.

[0037] It is worth noting that when the terminal block module 500 moves laterally closer to the busbar module 400, the two ends of the C-type terminal block body 520 abut against the busbar contact plates 415 of the upper busbar module 410 and the lower busbar module 420 respectively to achieve connection and closing; at the same time, the inner diameter of the clearance hole 533 is larger than the outer diameter of the control screw 710 to avoid the control screw 710 affecting the movement of the terminal block module 500.

[0038] A method for operating a ring main unit circuit breaker capable of rapid closing and opening, comprising the following steps: S1. When closing the circuit, the control module 600 is moved by the control screw 710. Under the connection of the storage spring 620, the control module 600 and the terminal module 500 move closer to the busbar module 400 in sync. S2. The terminal module 500 is first stopped by the straight limit block 830 on one side; then, as the control module 600 continues to move, the energy storage spring 620 is compressed and stores energy, while one end of the control slot 640 approaches the limit mechanism 800; the guide slope 641 moves laterally and drives the slope guide block 820 to descend, so that the limit mechanism 800 releases the limit on the terminal module 500; after the limit is released, the energy storage spring 620 returns to its original state and the terminal module 500 is quickly connected to the busbar module 400 for closing. S3. After closing the circuit, the control screw 710 is reversed to move one end of the control slot 640 away from the limit mechanism 800. At this time, the limit mechanism 800 is reset and inserted into the limit slot 532 to limit the terminal module 500. S4. When the circuit breaker is tripped, the control screw 710 continues to reverse, causing the control module 600 to move away from the busbar module 400. At this time, the storage spring 620 is stretched and stored, while the other end of the control slot 640 approaches the limit mechanism 800. The guide ramp 641 at the other end moves laterally and causes the ramp guide block 820 to descend, so that the limit mechanism 800 releases the limit on the terminal module 500. After the limit is released, the storage spring 620 returns to its original state and the terminal module 500 quickly disconnects from the busbar module 400.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A ring main unit circuit breaker capable of rapid closing and opening, characterized in that, The circuit breaker includes a circuit breaker cabinet (100), on which symmetrical track grooves (130) are fixedly connected to the side walls. A terminal block module (500) and a control module (600) are slidably connected between two track grooves (130). A busbar module (400) is fixedly connected inside the circuit breaker cabinet (100). The busbar module (400) includes an upper busbar module (410) and a lower busbar module (420). The upper busbar module (410) and the lower busbar module (420) are connected and disconnected by sliding the terminal block module (500). The control module (600) is fixedly connected to the terminal block module (500) by multiple energy storage springs (620). A limit groove (532) is opened at the bottom of the terminal block module (500), and a limit mechanism (800) is installed at the bottom of the circuit breaker cabinet (100).

2. The ring main unit circuit breaker capable of rapid closing and opening according to claim 1, characterized in that, The control module (600) includes a control vertical plate (610) and a control horizontal plate (630) connected to each other; the bottom ends of the control vertical plate (610) are fixedly provided with first sliders (611), and the first sliders (611) are slidably connected to the track groove (130); a threaded hole (612) is provided through the middle of the bottom of the control vertical plate (610), and the threaded hole (612) is threadedly connected to the control screw (710); a control slot (640) is provided through the control horizontal plate (630), and the two ends of the control slot (640) are provided as guide slopes (641).

3. A ring main unit circuit breaker capable of rapid closing and opening according to claim 2, characterized in that, The limiting mechanism (800) includes a straight guide block (810), an inclined guide block (820), and a straight limiting block (830) that are fixedly connected in sequence; the bottom of the circuit breaker cabinet (100) is fixedly provided with a base plate (110), and the base plate (110) is symmetrically provided with telescopic openings (111), and the bottom of the telescopic openings (111) is fixedly connected to a receiving box (120); the bottom of the receiving box (120) is fixedly connected to the straight guide block (810) through a return spring (840); the straight guide block (810) and the receiving box (120) are slidably connected; the limiting mechanism (800) is located between the control slots (640).

4. A ring main unit circuit breaker capable of rapid closing and opening according to claim 3, characterized in that, When the terminal block module (500) is connected to the busbar module (400) and closed, the limit mechanism (800) limits the control slot (640).

5. A ring main unit circuit breaker capable of rapid closing and opening according to claim 3, characterized in that, When the reset spring (840) is in the normal state, the top of the straight limit block (830) is higher than the bottom of the terminal block module (500).

6. A ring main unit circuit breaker capable of rapid closing and opening according to claim 1, characterized in that, It also includes a motor cabinet (300), which is fixed to one side of the circuit breaker cabinet (100). A reversible motor (700) is fixedly installed inside the motor cabinet (300). The output end of the reversible motor (700) passes through the circuit breaker cabinet (100) and is fixedly connected to the control screw (710).

7. A ring main unit circuit breaker capable of rapid closing and opening according to claim 1, characterized in that, It also includes a control cabinet (200), which is fixed to the bottom of the circuit breaker cabinet (100).

8. A ring main unit circuit breaker capable of rapid closing and opening according to claim 1, characterized in that, The upper busbar module (410) and the lower busbar module (420) have the same structure. The upper busbar module (410) includes a busbar box (411). Both ends of the busbar box (411) are fixedly connected to the circuit breaker cabinet (100) through brackets (412). The top of the busbar box (411) is provided with multiple busbar slots (413), and busbar contact plates (415) are fixedly inserted into the busbar slots (413). Multiple insulating cylinders (414) are fixedly connected to one side of the busbar box (411), and the insulating cylinders (414) are fixedly connected to the busbar slots (413).

9. A ring main unit circuit breaker capable of rapid closing and opening according to claim 1, characterized in that, The terminal block module (500) includes a vertical terminal block (540) and a horizontal terminal block (530) connected to each other. The horizontal terminal block (530) has a second slider (531) fixedly provided on both sides, and the second slider (531) is slidably connected to the track groove (130). The energy storage spring (620) is fixedly connected to the vertical terminal block (540). The limiting groove (532) is opened at the bottom of the horizontal terminal block (530), and the horizontal terminal block (530) has a clearance hole (533) through the middle. The top of the horizontal terminal block (530) is fixedly connected to a plurality of mounting cylinders (510), and the side wall of the mounting cylinder (510) is fixedly connected to two second insulating cylinders (511). The C-type terminal block body (520) is fixedly installed inside the mounting cylinder (510) and the second insulating cylinder (511).

10. A method for operating a ring main unit circuit breaker capable of rapid closing and opening, used to implement the ring main unit circuit breaker as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. When closing the circuit, the control module (600) is moved by the control screw (710). Under the connection of the storage spring (620), the control module (600) and the terminal module (500) move synchronously closer to the busbar module (400). S2. The terminal block module (500) is first stopped by the straight limit block (830) on one side; then, under the continued movement of the control module (600), the energy storage spring (620) is compressed and stored while the control slot (640) approaches the limit mechanism (800); the guide slope (641) moves laterally and drives the slope guide block (820) to descend, so that the limit mechanism (800) releases the limit on the terminal block module (500); after the limit is released, the energy storage spring (620) returns to its original state and the terminal block module (500) is quickly connected to the busbar module (400) for closing. S3. After closing the circuit, the control screw (710) is reversed to move one end of the control slot (640) away from the limit mechanism (800). At this time, the limit mechanism (800) is reset and inserted into the limit slot (532) to limit the terminal module (500). S4. When the circuit breaker is tripped, the control screw (710) continues to reverse, causing the control module (600) to move away from the busbar module (400). At this time, the energy storage spring (620) is stretched and stored, while the other end of the control slot (640) approaches the limit mechanism (800). The guide ramp (641) at the other end moves laterally and drives the ramp guide block (820) to descend, so that the limit mechanism (800) releases the limit on the terminal block module (500). After the limit is released, the energy storage spring (620) returns to its original state and the terminal block module (500) quickly disconnects from the busbar module (400) and trips.

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