A modular plug-in circuit breaker

Abstract

The application discloses a kind of module plug-in circuit breaker of high-voltage switchgear technical field, to solve the phenomenon that the protection level of primary and secondary equipment is inconsistent in prior art;Primary and secondary equipment staggered layer installation, the problem that the cable of navigation plug is not beautiful;It includes box, the on-off mechanism is equipped in the box, the outer wall of the box is detachably connected with spring operating mechanism, incoming / outgoing line bushing assembly and feeder terminal assembly;The on-off mechanism includes the first support plate detachably connected with the box, the outer wall of the first support plate is equipped with support frame on one side, the outer wall of the first support plate is equipped with the spring operating mechanism on the other side;The application can seal primary and secondary key devices in the box, not affected by external environment, ensure that the protection level of primary and secondary equipment is consistent, while avoiding staggered layer installation, ensure that the cable of navigation plug is beautiful, while avoiding the risk of water immersion, prolong the whole production cycle of product, reduce operation and maintenance cost.

Description

Technical Field

[0001] This invention relates to a modular pluggable circuit breaker, belonging to the technical field of high-voltage switchgear. Background Technology

[0002] High-voltage switchgear is one of the main pieces of equipment in power distribution networks. It is typically used in sets of primary and secondary equipment to transmit, distribute, and protect electrical energy across lines. Circuit breakers, as a core component of high-voltage switchgear, are used both indoors and outdoors. Outdoor applications place higher demands on the overall structural design of circuit breakers. With the power grid's significant investment in distribution equipment, more and more outdoor circuit breakers will play a crucial role in power distribution network lines. Developing reliable equipment that addresses the risks arising from multiple aspects, thereby ensuring line safety and achieving user satisfaction, is a pressing challenge.

[0003] Currently, most outdoor circuit breakers on the market are designed with separate primary and secondary circuits connected by a jack cable. This design has several problems: the protection levels of the primary and secondary equipment are inconsistent; the primary and secondary equipment are installed at different levels; the jack cable routing is unsightly and poses a risk of water immersion, affecting the actual performance of the circuit breaker. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular pluggable circuit breaker in which primary and secondary key components can be sealed in the enclosure, unaffected by the external environment, ensuring consistent protection levels for primary and secondary equipment, avoiding misaligned installation, ensuring aesthetically pleasing wiring of aviation cables, preventing water immersion risks, extending the product's entire production cycle, and reducing operation and maintenance costs.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: This invention provides a modular pluggable circuit breaker, including a housing, a switching mechanism inside the housing, and a spring operating mechanism, an inlet / outlet bushing assembly, and a feeder terminal assembly detachably connected to the outer wall of the housing. The switching mechanism includes a first support plate detachably connected to the housing. A support frame is provided on one side of the outer wall of the first support plate, and the spring operating mechanism is provided on the other side of the outer wall of the first support plate. An insulating pole is provided on the top of the support frame inside the housing. A transmission main shaft assembly is rotatably connected to the insulating pole on one side of the support frame. A transmission bracket assembly is rotatably connected inside the insulating pole. An insulating pull rod assembly is rotatably connected between the transmission bracket assembly and the transmission main shaft assembly. The spring operating mechanism is used to drive the transmission spindle assembly to rotate. The inlet and outlet bushing assembly is detachably connected to the insulating pole, and the feeder terminal assembly is detachably connected to the support frame.

[0006] Furthermore, the enclosure includes two first sealing plates, a second sealing plate, a third sealing plate, a fourth sealing plate, and a fifth sealing plate. The two first sealing plates, the second sealing plate, the third sealing plate, the fourth sealing plate, the fifth sealing plate, the switching mechanism, the spring operating mechanism, the inlet / outlet sleeve assembly, and the feeder terminal assembly cooperate to form a sealed space, which is filled with insulating gas.

[0007] Furthermore, the first sealing plate includes a first plate and a first stud disposed on the first plate; The second sealing plate includes a second plate, and the third sealing plate includes a third plate. Both the second plate and the third plate are provided with a second stud and a positioning plate. The third plate is detachably connected to the first support plate; The fourth sealing plate includes a fourth plate and an inflation check valve disposed on the fourth plate; The fifth sealing plate includes a fifth plate and a first support plate and a second support plate disposed on the fifth plate; A sliding rail bend is provided between the second sealing plate, the third sealing plate and the fifth sealing plate.

[0008] Furthermore, the inlet and outlet bushing assembly includes an inlet bushing assembly and an outlet bushing assembly. Both the inlet bushing assembly and the outlet bushing assembly include a bushing fixing plate assembly, and a bushing is detachably connected to the bushing fixing plate assembly on one side of the insulating pole.

[0009] Furthermore, the sleeve fixing plate assembly includes a fixing plate and a positioning pin disposed on the fixing plate, the positioning pin being located on one side of the positioning plate, and the sleeve fixing plate assembly being detachably connected to the first stud.

[0010] Furthermore, there are multiple insulating poles and multiple bushings, and the bushings include bent bushings and straight bushings.

[0011] Furthermore, the support frame includes a second support plate, the second support plate includes a rear support bend and a socket disposed on the outer wall of the rear support bend, the socket being provided with a secondary wire; The first support plate and the rear support bend plate are provided with the same bottom support assembly at their bottoms. A support insulating rod is provided between the first support plate and the rear support bend plate. The first support plate and the rear support bend plate are detachably connected to the support insulating rod by a first bolt. The inner wall of the first support plate is provided with a gate spring device on one side of the transmission main shaft assembly, and one end of the gate spring device is rotatably connected to the transmission main shaft assembly. The bottom support assembly includes a bottom support curved plate and a third support plate disposed on the bottom support curved plate. Multiple second fixing bolt assemblies are symmetrically arranged on both sides of the outer wall of the bottom support curved plate. Rollers that are rotatably connected are sleeved on the outer wall of the second fixing bolt assembly. The rollers are rotatably connected to the second fixing bolt assembly through bearings. The rollers are located on one side of the slide rail curved plate. The outer wall of the second support plate is provided with a buffer device on one side of the transmission spindle assembly, and the buffer device is used to block the transmission spindle assembly.

[0012] Furthermore, the feeder terminal assembly includes a terminal support plate and a feeder terminal. The feeder terminal includes a terminal core unit disposed on the terminal support plate. A plug is provided inside the terminal support plate. The plug is electrically connected to the terminal core unit. The plug is located on one side of the socket. A terminal cover is provided on the outside of the terminal support plate. The terminal cover is used to seal the terminal core unit and the plug. The outer wall of the first support plate is provided with a mechanism cover, which is used to seal the spring operating mechanism. The mechanism cover includes a first cover body and the terminal cover includes a second cover body. Both the first cover body and the second cover body are provided with handles.

[0013] Furthermore, the insulating pole includes a mounting block, which is detachably connected to the support frame. A moving end contact seat and a stationary end contact seat are respectively provided on both sides of the mounting block. A vacuum arc-extinguishing device is provided inside the mounting block. One end of the vacuum arc-extinguishing device has a stationary contact connected to the stationary end contact seat, and the other end of the vacuum arc-extinguishing device has a slidingly connected moving contact. The moving contact is connected to the moving end contact seat via a flexible connection. A first measuring device is provided on one side of the moving end contact seat within the mounting block, and a second measuring device is provided on one side of the stationary end contact seat within the mounting block. Spring contact fingers are provided on both the moving end contact seat and the stationary end contact seat.

[0014] Furthermore, one end of the moving contact extends to the outside of the vacuum arc extinguishing device, and a mounting post is provided on the outer wall of the moving contact on one side of the transmission support assembly. A through groove is provided at one end of the transmission support assembly, and the through groove is located outside the mounting post. When the transmission support assembly rotates, the mounting post can be moved closer to or away from the stationary contact through the through groove.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. This modular plug-in circuit breaker has its switching mechanism installed inside the enclosure. The inlet and outlet bushing assemblies, feeder terminal assemblies, and spring operating mechanisms can be reliably connected to the enclosure from different directions via plug-in methods. The primary and secondary key components can be sealed inside the enclosure, unaffected by the external environment, ensuring consistent protection levels for primary and secondary equipment. It also avoids misaligned installation, ensuring aesthetically pleasing wiring of aviation plug cables, preventing water immersion risks, extending the product's entire production cycle, and reducing operation and maintenance costs. 2. This modular pluggable circuit breaker ensures that the spring operating mechanism, terminal core unit, primary main conductive circuit, and secondary circuit are unaffected by the external environment, maintaining consistent protection levels for both primary and secondary equipment. This extends the product's entire lifecycle, enabling full production testing and convenient on-site maintenance. The switching mechanism connects to the feeder terminal assembly via sockets and plugs, reducing the need for connecting aviation cables, lowering the risk of water immersion, improving equipment reliability, and ensuring the integrity and aesthetics of both primary and secondary components. Furthermore, it features a short construction period and convenient on-site maintenance. Attached Figure Description

[0016] Figure 1 This is a top cross-sectional view of a modular pluggable circuit breaker according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the frame of a modular pluggable circuit breaker according to an embodiment of the present invention; Figure 3 This is a top cross-sectional structural diagram of the box body provided according to an embodiment of the present invention; Figure 4 This is a top view of the on / off mechanism and the spring operating mechanism provided according to an embodiment of the present invention; Figure 5 This is a side view of the switching mechanism provided in an embodiment of the present invention; Figure 6 This is a top view of the inlet / outlet bushing assembly provided according to an embodiment of the present invention; Figure 7 This is a top cross-sectional view of the feeder terminal assembly provided according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the front cross-sectional structure of the insulating pole provided according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the moving contact and the stationary contact provided in an embodiment of the present invention.

[0017] In the diagram: 1. Housing; 2. Switching mechanism; 3. Inlet / outlet bushing assembly; 4. Feeder terminal assembly; 101. First sealing plate; 1011. First plate; 1012. First stud; 102. Second sealing plate; 1021. Second plate; 1022. Second stud; 1023. Positioning plate; 103. Third sealing plate; 1031. Third plate; 104. Fourth sealing plate; 1041. Fourth plate; 1042. Inflation check valve; 105. Fifth sealing plate; 1051. Fifth plate; 1052. First support plate; 10 53. Second support plate; 106. Small T-shaped sealing ring; 107. Large T-shaped sealing ring; 108. Slide rail bend plate; 201. Mechanism cover; 2011. First cover body; 2012. Handle; 202. Spring operating mechanism; 203. O-ring seal; 204. First support plate; 205. First bolt; 206. Support insulating rod; 207. Insulating pole; 2071. Mounting block; 2072. Moving end contact seat; 2073. Spring contact finger; 2074. First measuring device; 2075. Vacuum arc extinguishing device 2076. Round head bolt assembly; 2077. Stationary contact seat; 2078. Second measuring device; 208. Transmission bracket assembly; 209. Insulating tie rod assembly; 210. Transmission spindle assembly; 211. Buffer device; 212. Opening spring device; 213. First fixing bolt assembly; 214. Second support plate; 2141. Rear support bend plate; 2142. Socket; 215. Bottom support assembly; 2151. Bottom support bend plate; 2152. Third support plate; 2153. Roller; 2154. Second fixing... 2155. Fixed bolt assembly; 216. Bearing; 217. Third fixed bolt assembly; 301. Flexible connection; 302. Bent sleeve; 303. Straight sleeve; 304. Sleeve fixing plate assembly; 305. Fixing plate; 306. Welded stud; 307. Positioning pin; 308. Nut assembly; 309. Crimped bent plate; 3000. Sleeve sealing ring; 401. Terminal cover; 4011. Second cover; 402. Feeder terminal; 4021. Terminal core unit; 4022. Plug; 403. Terminal support plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] like Figure 1 and Figure 4 As shown, the present invention provides a modular pluggable circuit breaker, including a housing 1. The housing 1 contains a switching mechanism 2. A spring operating mechanism 202, an inlet / outlet bushing assembly 3, and a feeder terminal assembly 4 are detachably connected to the outer wall of the housing 1. The switching mechanism 2 includes a first support plate 204 detachably connected to the housing 1. A support frame is provided on one side of the outer wall of the first support plate 204, and the spring operating mechanism 202 is provided on the other side of the outer wall of the first support plate 204. An insulating pole 20 is provided at the top of the support frame inside the housing 1. 7. A transmission spindle assembly 210 is rotatably connected to one side of the insulating pole 207 within the support frame. A transmission bracket assembly 208 is rotatably connected within the insulating pole 207. An insulating pull rod assembly 209 is rotatably connected between the transmission bracket assembly 208 and the transmission spindle assembly 210. The spring operating mechanism 202 is used to drive the transmission spindle assembly 210 to rotate. The inlet / outlet sleeve assembly 3 is detachably connected to the insulating pole 207. The feeder terminal assembly 4 is detachably connected to the support frame.

[0022] Specifically, such as Figure 2As shown, the present invention specifically consists of a box 1 filled with insulating gas at its center point, a trolley-type switching device with a sealing structure, namely a switching mechanism 2 and a spring operating mechanism 202 (negative Y-axis direction), a pluggable inlet and outlet bushing with a double-sided sealing structure, namely an inlet and outlet bushing assembly 3 (positive and negative X-axis direction), and a pluggable feeder terminal with a sealing structure, namely a feeder terminal assembly 4 (positive Y-axis direction).

[0023] like Figure 1 As shown, this application specifically consists of a housing 1, a switching mechanism 2, a spring operating mechanism 202, double-sided inlet and outlet bushing assemblies 3, and a feeder terminal assembly 4. First, the switching mechanism 2 is installed on the housing 1. Then, the double-sided inlet and outlet bushing assemblies 3 are installed on both sides of the housing 1 and plugged into the switching mechanism 2. Finally, the feeder terminal assembly 4 is installed on one side of the housing 1, realizing a modular plug-in design and forming a circuit breaker in which the primary and secondary main components are placed in a sealed space, ensuring the consistency of the protection level of the primary and secondary equipment, enabling full production testing and convenient on-site operation and maintenance.

[0024] like Figure 3 and Figure 8 As shown, in this embodiment, the housing 1 includes two first sealing plates 101, a second sealing plate 102, a third sealing plate 103, a fourth sealing plate 104, and a fifth sealing plate 105. The two first sealing plates 101, the second sealing plate 102, the third sealing plate 103, the fourth sealing plate 104, the fifth sealing plate 105, the on / off mechanism 2, the spring operating mechanism 202, the inlet / outlet sleeve assembly 3, and the feeder terminal assembly 4 cooperate to form a sealed space, which is filled with insulating gas.

[0025] Specifically, the housing 1 is formed by laser welding after being fixed by tooling fixtures with two first sealing plates 101, one second sealing plate 102, one third sealing plate 103, one fourth sealing plate 104, and one fifth sealing plate 105; wherein, the two first sealing plates 101 are located on the left and right sides, the second sealing plate 102 is located on the rear side, the third sealing plate 103 is located on the front side, the fourth sealing plate 104 is located on the top side, and the fifth sealing plate 105 is located on the bottom side.

[0026] In this embodiment, the first sealing plate 101 includes a first plate 1011 and a first stud 1012 disposed on the first plate 1011; The second sealing plate 102 includes a second plate 1021, and the third sealing plate 103 includes a third plate 1031. The second plate 1021 and the third plate 1031 are each provided with a second stud 1022 and a positioning plate 1023. The third plate 1031 is detachably connected to the first support plate 204; The fourth sealing plate 104 includes a fourth plate 1041 and an inflation check valve 1042 disposed on the fourth plate 1041; The fifth sealing plate 105 includes a fifth plate 1051 and a first support plate 1052 and a second support plate 1053 disposed on the fifth plate 1051; A slide rail curved plate 108 is provided between the second sealing plate 102, the third sealing plate 103 and the fifth sealing plate 105.

[0027] Optionally, the first plate 1011 is welded to the first stud 1012; the second plate 1021 is welded to the corresponding second stud 1022 and positioning plate 1023; the third plate 1031 is welded to the corresponding second stud 1022 and positioning plate 1023; the fourth plate 1041 is welded to the inflation check valve 1042; the fifth plate 1051, the first support plate 1052, and the second support plate 1053 are welded together; and the second sealing plate 102, the third sealing plate 103, the fifth sealing plate 105, and the slide rail bend plate 108 are welded together. Optionally, the positioning plate 1023, the first support plate 1052, and the second support plate 1053 are all U-shaped.

[0028] The third sealing plate 103 is equipped with a T-shaped large sealing ring 107, and the first support plate 204 is fixed to the second stud 1022 of the third sealing plate 103 by the nut assembly 304 to achieve the sealing of the box 1.

[0029] like Figure 6 As shown, in this embodiment, the inlet and outlet bushing assembly 3 includes an inlet bushing assembly and an outlet bushing assembly. Both the inlet bushing assembly and the outlet bushing assembly include a bushing fixing plate assembly 303. A bushing is detachably connected to one side of the insulating pole 207 on the bushing fixing plate assembly 303. There are multiple insulating poles 207 and bushings. The bushings include bent bushings 301 and straight bushings 302. The bushing fixing plate assembly 303 includes a fixing plate 3031 and a positioning pin 3033 disposed on the fixing plate 3031. The positioning pin 3033 is located on one side of the positioning plate 1023. The bushing fixing plate assembly 303 is detachably connected to the first stud 1012.

[0030] Specifically, there are three sleeves, including two bent sleeves 301 and one straight sleeve 302. The two bent sleeves 301 and the one straight sleeve 302 are fixed to the crimping bent plate 305 on the sleeve fixing plate assembly 303 by the nut assembly 304. The sleeve fixing plate assembly 303 is provided with a sleeve sealing ring 306 on one side of the sleeve. The sleeve fixing plate assembly 303 includes a fixing plate 3031, a welding stud 3032 and a positioning pin 3033 welded together. The welding stud 3032 is used to fix the fixing plate 3031 and the crimping bent plate 305. The positioning pin 3033 is locked to the positioning plate 1023 of the housing 1. The first sealing plate 101 is equipped with a T-shaped small sealing ring 106. The sleeve fixing plate assembly 303 is fixed to the first stud 1012 of the first sealing plate 101 by the nut assembly 304 to achieve the sealing of the housing 1.

[0031] Specifically, the contact fingers of the bent bushing 301 and the straight bushing 302 are in reliable contact with the spring contact fingers 2073 of the insulating pole 207, so that the conduction of the double-sided circuit is realized when the switching mechanism 2 is closed.

[0032] like Figure 3 and Figure 5 As shown, in this embodiment, the support frame includes a second support plate 214, the second support plate 214 includes a rear support bend plate 2141 and a socket 2142 disposed on the outer wall of the rear support bend plate 2141, the socket 2142 is provided with secondary wires, specifically including secondary wires for CT sampling, mechanism remote control and signal sampling, etc. The first support plate 204 and the rear support bend plate 2141 are provided with the same bottom support assembly 215. A support insulating rod 206 is provided between the first support plate 204 and the rear support bend plate 2141. The first support plate 204 and the rear support bend plate 2141 are detachably connected to the support insulating rod 206 by a first bolt 205. The inner wall of the first support plate 204 is provided with a spring-splitting device 212 on one side of the transmission spindle assembly 210, and one end of the spring-splitting device 212 is rotatably connected to the transmission spindle assembly 210. The bottom support assembly 215 includes a bottom support curved plate 2151 and a third support plate 2152 disposed on the bottom support curved plate 2151. A plurality of second fixing bolt assemblies 2154 are symmetrically arranged on both sides of the outer wall of the bottom support curved plate 2151. Rollers 2153 are rotatably connected to the outer wall of the second fixing bolt assembly 2154. The rollers 2153 are rotatably connected to the second fixing bolt assembly 2154 through bearings 2155. The rollers 2153 are located on one side of the slide rail curved plate 108. The outer wall of the second support plate 214 is provided with a buffer device 211 on one side of the transmission spindle assembly 210. The buffer device 211 is used to block the transmission spindle assembly 210.

[0033] Specifically, the first support plate 204, the second support plate 214, and the support insulating rod 206 are fastened by the first bolt 205 and then welded to the bottom support assembly 215 to form a support frame; the second support plate 214 is composed of a rear support bent plate 2141 and a socket 2142; the bottom support assembly 215 is formed by welding the bottom support bent plate 2151 and the third support plate 2152, and the rollers 2153 and bearings 2155 are installed on both sides of the bottom support assembly 215 through the second fixing bolt assembly 2154; the transmission main shaft assembly 210 is rotatably disposed between the first support plate 204 and the second support plate 214, and is connected to the spring operating mechanism 202, the insulating pull rod assembly 209, and the gate spring device 212; the buffer device 211 is fixed to the inner wall of the second support plate 214; the rollers 2153 of the bottom support bent plate 2151 can slide freely on the slide rail bent plate 108 of the housing 1.

[0034] like Figure 7 As shown, in this embodiment, the feeder terminal assembly 4 includes a terminal support plate 403 and a feeder terminal 402. The feeder terminal 402 includes a terminal core unit 4021 disposed on the terminal support plate 403. A plug 4022 is disposed inside the terminal support plate 403. The plug 4022 is electrically connected to the terminal core unit 4021. The plug 4022 is located on one side of the socket 2142. A terminal cover 401 is disposed on the outside of the terminal support plate 403. The terminal cover 401 is used to seal the terminal core unit 4021 and the plug 4022. A mechanism cover 201 is disposed on the outer wall of the first support plate 204. The mechanism cover 201 is used to seal the spring operating mechanism 202. The mechanism cover 201 includes a first cover body 2011. The terminal cover 401 includes a second cover body 4011. Both the first cover body 2011 and the second cover body 4011 are provided with handles 2012.

[0035] Specifically, the second sealing plate 102 is equipped with a T-shaped large sealing ring 107. The terminal support plate 403 of the feeder terminal assembly 4 is fixed to the second stud 1022 of the second sealing plate 102 by the nut assembly 304, thereby achieving the sealing of the housing 1. The socket 2142 of the switching mechanism 2 and the plug 4022 of the feeder terminal assembly 4 are connected to achieve interconnection between primary and secondary equipment, reduce the conversion of intermediate aviation cable links, and reduce the risk of cable immersion. The spring operating mechanism 202 is fixed on the first support plate 204 containing the O-ring seal 203 and is sealed by the mechanism cover 201. The first cover 2011 and the handle 2012 are welded together to facilitate the insertion and removal of the switching mechanism 2. The feeder terminal assembly 4 is fixed by the feeder terminal 402 on the terminal support plate 403 with the O-ring seal 203. The second cover 4011 and the handle 2012 are welded together to facilitate the insertion and removal of the feeder terminal assembly 4.

[0036] like Figure 8 and Figure 9 As shown, in this embodiment, the insulating pole 207 includes a mounting block 2071, which is detachably connected to the support frame. The mounting block 2071 has a moving contact seat 2072 and a stationary contact seat 2077 on each side. A vacuum arc-extinguishing device 2075 is located inside the mounting block 2071. One end of the vacuum arc-extinguishing device 2075 has a stationary contact connected to the stationary contact seat 2077, and the other end has a slidingly connected moving contact. The moving contact is connected to the moving contact seat 2072 via a flexible connection 217. The mounting block 2071 is located within the moving contact seat 2072. A first measuring device 2074 is provided on one side of the 072. A second measuring device 2078 is provided inside the mounting block 2071 and on one side of the stationary contact seat 2077. Spring contact fingers 2073 are provided on both the moving contact seat 2072 and the stationary contact seat 2077. One end of the moving contact extends to the outside of the vacuum arc extinguishing device 2075. A mounting post is provided on the outer wall of the moving contact on one side of the transmission bracket assembly 208. A through groove is opened at one end of the transmission bracket assembly 208. The through groove is located outside the mounting post. When the transmission bracket assembly 208 rotates, the mounting post can be moved closer to or away from the stationary contact through the through groove.

[0037] Specifically, the mounting block 2071 is cast from epoxy resin. The first measuring device 2074 samples the phase current, and the second measuring device 2078 samples the zero-sequence current. Both are current transformers and belong to inductive devices. They are isolated and fixed to the moving end contact seat 2072 and the stationary end contact seat 2077 by epoxy resin. The vacuum arc extinguishing device 2075 is fixed to the mounting block 2071 by the round head bolt assembly 2076. The mounting block 2071 is fixed to the bottom support assembly 215 by the first fixing bolt assembly 213. The transmission bracket assembly 208 and the flexible connection 217 are both fixedly connected to the mounting block 2071 by the third fixing bolt assembly 216.

[0038] During operation, when the spring operating mechanism 202 is fully charged, it triggers the closing mechanism, causing the transmission main shaft assembly 210 to rotate counterclockwise. The opening spring device 212 is compressed, causing the insulating pull rod assembly 209 to move to the lower left, thereby driving the transmission support assembly 208 to rotate. The transmission support assembly 208, through the cooperation of the through slot and the mounting column, pushes the moving contact closer to the stationary contact. When the moving contact contacts the stationary contact, the vacuum arc extinguishing device 2075 is turned on. Conversely, when the spring operating mechanism 202 triggers the opening mechanism, it causes the transmission main shaft assembly 210 to rotate clockwise. The opening spring device 212 releases energy, assisting the insulating pull rod assembly 209 to move to the upper right, causing the transmission support assembly 208 to rotate in the opposite direction, driving the moving contact away from the stationary contact. At the same time, the rotation of the transmission main shaft assembly 210 is restricted by the buffer device 211, thus disconnecting the vacuum arc extinguishing device 2075.

[0039] The switching mechanism 2 of this invention is installed inside the housing 1. The inlet / outlet sleeve assembly 3, the feeder terminal assembly 4, and the spring operating mechanism 202 can be reliably connected to the housing 1 from different directions via plug-in connection. The primary circuit is connected through the sleeve and the spring contact finger 2073, and the secondary circuit is connected through the plug 4022 and the socket 2142. The mechanism, the main circuit, and the feeder terminal 402, as well as other key primary and secondary components, can be sealed inside the housing 1 filled with insulating gas, unaffected by the external environment, ensuring consistent protection levels for primary and secondary equipment, avoiding misaligned installation, ensuring aesthetically pleasing wiring of the aviation cable, preventing water immersion risks, extending the product's entire production cycle, and reducing maintenance costs. Furthermore, the modular classification and combination of this invention facilitates production testing and control, enabling lean production.

[0040] This invention ensures that the spring operating mechanism 202, the terminal core unit 4021, the primary main conductive circuit, and the secondary circuit are not affected by the external environment, and that the protection level of the primary and secondary equipment is consistent, thus extending the product's entire life cycle. It also enables full production testing and facilitates on-site operation and maintenance. The switching mechanism 2 and the feeder terminal assembly 4 are connected via a socket 2142 and a plug 4022, reducing the connection of aviation cables, lowering the risk of water immersion, improving the reliability of equipment operation, and ensuring the integrity and aesthetics of the primary and secondary components. At the same time, the construction period is short and on-site operation and maintenance are convenient.

[0041] The modular design of the primary and secondary equipment in this invention allows for production control of individual modules. When combined according to user needs, each set can undergo full testing, ensuring the practicality of this invention.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A modular pluggable circuit breaker, characterized in that, Includes a housing (1), which is equipped with a switching mechanism (2). The outer wall of the housing (1) is detachably connected to a spring operating mechanism (202), an inlet / outlet sleeve assembly (3), and a feeder terminal assembly (4). The switching mechanism (2) includes a first support plate (204) detachably connected to the housing (1). A support frame is provided on one side of the outer wall of the first support plate (204), and the spring operating mechanism (202) is provided on the other side of the outer wall of the first support plate (204). An insulating pole (207) is provided on the top of the support frame inside the housing (1). A transmission spindle assembly (210) is provided rotatably connected to one side of the insulating pole (207) inside the support frame. A transmission bracket assembly (208) is provided rotatably connected inside the insulating pole (207). An insulating pull rod assembly (209) is provided rotatably connected between the transmission bracket assembly (208) and the transmission spindle assembly (210). The spring operating mechanism (202) is used to drive the transmission spindle assembly (210) to rotate. The inlet and outlet sleeve assembly (3) is detachably connected to the insulating pole (207). The feeder terminal assembly (4) is detachably connected to the support frame. The enclosure (1) includes two first sealing plates (101), a second sealing plate (102), a third sealing plate (103), a fourth sealing plate (104), and a fifth sealing plate (105). The two first sealing plates (101), the second sealing plate (102), the third sealing plate (103), the fourth sealing plate (104), the fifth sealing plate (105), the switching mechanism (2), the spring operating mechanism (202), the inlet and outlet bushing assembly (3), and the feeder terminal assembly (4) cooperate to form a sealed space, which is filled with insulating gas. The first sealing plate (101) includes a first plate (1011) and a first stud (1012) disposed on the first plate (1011). The second sealing plate (102) includes a second plate (1021), and the third sealing plate (103) includes a third plate (1031). The second plate (1021) and the third plate (1031) are each provided with a second stud (1022) and a positioning plate (1023). The third plate (1031) is detachably connected to the first support plate (204); The fourth sealing plate (104) includes a fourth plate (1041) and an inflation check valve (1042) disposed on the fourth plate (1041). The fifth sealing plate (105) includes a fifth plate (1051) and a first support plate (1052) and a second support plate (1053) disposed on the fifth plate (1051). A slide rail bend plate (108) is provided between the second sealing plate (102), the third sealing plate (103) and the fifth sealing plate (105).

2. The modular pluggable circuit breaker according to claim 1, characterized in that, The inlet and outlet bushing assembly (3) includes an inlet bushing assembly and an outlet bushing assembly. Both the inlet bushing assembly and the outlet bushing assembly include a bushing fixing plate assembly (303). A bushing is detachably connected to the bushing fixing plate assembly (303) on one side of the insulating pole (207).

3. The modular pluggable circuit breaker according to claim 2, characterized in that, The sleeve fixing plate assembly (303) includes a fixing plate (3031) and a positioning pin (3033) disposed on the fixing plate (3031). The positioning pin (3033) is located on one side of the positioning plate (1023). The sleeve fixing plate assembly (303) is detachably connected to the first stud (1012).

4. The modular pluggable circuit breaker according to claim 2, characterized in that, The number of insulating poles (207) and bushings are both multiple, and the bushings include bent bushings (301) and straight bushings (302).

5. The modular pluggable circuit breaker according to claim 1, characterized in that, The support frame includes a second support plate (214), the second support plate (214) includes a rear support bend plate (2141) and a socket (2142) disposed on the outer wall of the rear support bend plate (2141), and the socket (2142) is provided with a secondary wire; The first support plate (204) and the rear support bend plate (2141) are provided with the same bottom support assembly (215). A support insulating rod (206) is provided between the first support plate (204) and the rear support bend plate (2141). The first support plate (204) and the rear support bend plate (2141) are detachably connected to the support insulating rod (206) by a first bolt (205). The inner wall of the first support plate (204) is provided with a stop spring device (212) on one side of the transmission main shaft assembly (210), and one end of the stop spring device (212) is rotatably connected to the transmission main shaft assembly (210); The bottom support assembly (215) includes a bottom support bend plate (2151) and a third support plate (2152) disposed on the bottom support bend plate (2151). A plurality of second fixing bolt assemblies (2154) are symmetrically arranged on both sides of the outer wall of the bottom support bend plate (2151). A rotatably connected roller (2153) is sleeved on the outer wall of the second fixing bolt assembly (2154). The roller (2153) is rotatably connected to the second fixing bolt assembly (2154) through a bearing (2155). The roller (2153) is located on one side of the slide rail bend plate (108). The outer wall of the second support plate (214) is provided with a buffer device (211) on one side of the transmission spindle assembly (210), and the buffer device (211) is used to block the transmission spindle assembly (210).

6. The modular pluggable circuit breaker according to claim 5, characterized in that, The feeder terminal assembly (4) includes a terminal support plate (403) and a feeder terminal (402). The feeder terminal (402) includes a terminal core unit (4021) disposed on the terminal support plate (403). A plug (4022) is disposed inside the terminal support plate (403). The plug (4022) is electrically connected to the terminal core unit (4021). The plug (4022) is located on one side of the socket (2142). A terminal cover (401) is disposed on the outside of the terminal support plate (403). The terminal cover (401) is used to seal the terminal core unit (4021) and the plug (4022). The outer wall of the first support plate (204) is provided with a mechanism cover (201), which is used to seal the spring operating mechanism (202). The mechanism cover (201) includes a first cover body (2011), and the terminal cover (401) includes a second cover body (4011). Both the first cover body (2011) and the second cover body (4011) are provided with handles (2012).

7. The modular pluggable circuit breaker according to claim 1, characterized in that, The insulating pole (207) includes a mounting block (2071), which is detachably connected to the support frame. The mounting block (2071) has a moving contact seat (2072) and a stationary contact seat (2077) on its two sides respectively. A vacuum arc-extinguishing device (2075) is installed inside the mounting block (2071). One end of the vacuum arc-extinguishing device (2075) is provided with a stationary contact connected to the stationary contact seat (2077), and the other end of the vacuum arc-extinguishing device (2075)... The end is provided with a sliding contact, which is connected to the moving end contact seat (2072) via a flexible connection (217). The mounting block (2071) is provided with a first measuring device (2074) on one side of the moving end contact seat (2072), and the mounting block (2071) is provided with a second measuring device (2078) on one side of the stationary end contact seat (2077). Both the moving end contact seat (2072) and the stationary end contact seat (2077) are provided with spring contact fingers (2073).

8. The modular pluggable circuit breaker according to claim 7, characterized in that, One end of the moving contact extends to the outside of the vacuum arc extinguishing device (2075). The outer wall of the moving contact is provided with a mounting post on one side of the transmission support assembly (208). One end of the transmission support assembly (208) is provided with a through groove. The through groove is located outside the mounting post. When the transmission support assembly (208) rotates, the mounting post can be driven to move closer to or away from the stationary contact through the through groove.

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