A drawer type circuit breaker with electric isolation and arc prevention

Abstract

The utility model belongs to circuit breaker technical field especially relates to a kind of arc type drawer type circuit breaker of electric isolation prevention, including drawer type socket, frame and circuit breaker body, the rear portion of frame is inwardly inserted and is connected and is installed drawer type socket, the front portion of frame is installed circuit breaker body;Circuit breaker body includes bakelite base, outer epoxy baffle, inner epoxy baffle, outer fastener, busbar connecting plate, busbar and contact assembly.The utility model structure design is reasonable, in the base body on bakelite base, between the installation area of two adjacent contacts of inner end face same row, install intermediate vertical strip muscle, install side vertical strip muscle in the outside of outermost layer contact installation area, jointly clamping installation outer epoxy baffle and inner epoxy baffle, realize the effective isolation between phase and phase;Lifting plate and upper step plate outside of frame side plate unit install side plate isolation component, frame pull plate outside installs pull plate isolation component, effectively isolate phase and ground, reduce the risk of electric leakage, improve safety.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to a drawer-type circuit breaker with electrical isolation and arc prevention. Background Technology

[0002] As an advanced power distribution device, the drawer-type circuit breaker's core advantage lies in significantly improving system safety and operational efficiency. When a circuit fault occurs, only the corresponding drawer unit needs to be pulled out for maintenance, without cutting off the main power supply, ensuring continuous power supply to other circuits and greatly reducing the risk of power outages and maintenance costs. Its modular design supports rapid replacement or backup unit access, reducing fault handling time to one-third of traditional methods, making it particularly suitable for industrial scenarios with high continuity requirements. In terms of safety, the main circuit is automatically disconnected and physically isolated when the drawer is pulled out, combined with a mechanical interlocking mechanism, effectively preventing misoperation or electric shock accidents, meeting the IP30 protection standard. Furthermore, this structure is highly scalable; adding a new power distribution circuit only requires installing a drawer unit in the reserved location, without modifying the cabinet structure or affecting the existing operating system, providing great flexibility for future upgrades. The drawer-type circuit breaker also achieves interchangeability and adaptation of modules with different current specifications through a standardized interface design, easily coping with load change requirements. Overall, its comprehensive advantages are reflected in three dimensions: precise fault isolation, convenient and efficient maintenance, and flexible and reliable expansion, making it an ideal choice for modern intelligent power distribution systems.

[0003] The existing drawer-type circuit breakers have been found to have the following shortcomings during use: First, they lack isolation components between phases, and their side plates and pull plates also lack isolation components to isolate phases from ground; second, their epoxy partitions lack guide components, causing the epoxy partitions to easily tilt left and right when rising; third, the epoxy partition design is not reasonable enough, and the IP protection level needs to be further strengthened; fourth, due to the limitations of the frame specifications, the nut spacing is small, which makes the nuts prone to leakage, resulting in a high safety hazard.

[0004] In view of this, the inventors of the utility model aim to optimize and improve the existing drawer-type circuit breaker and provide an anti-arc and anti-electricity drawer-type circuit breaker. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned problems existing in the traditional technology and provide an anti-arc and anti-electric drawer-type circuit breaker.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution: This utility model provides an arc-proof drawer-type circuit breaker, including a drawer-type socket, a frame, and a circuit breaker body. The frame is a rectangular frame formed by two frame side plate units, a frame top plate unit, and a frame bottom plate unit. The drawer-type socket is inserted into the rear of the frame, and the circuit breaker body is installed at the front of the frame. The circuit breaker body includes a bakelite base, an outer epoxy partition, an inner epoxy partition, outer fasteners, a busbar connection plate, a busbar, and a contact assembly. The bakelite base includes a base body, which has multiple contact mounting areas arranged in a rectangular array for mounting the contact assembly. A central vertical rib is installed on the inner end face of the base body between two adjacent contact mounting areas in the same row to separate phases. A side vertical rib is installed on the inner end face of the base body outside the outermost contact mounting area. Multiple partition mounting screw holes are provided on the upper and lower edges of the inner end face of the base body. The outer epoxy partition and inner epoxy partition are mounted on the inner end of the base body using the central and side vertical ribs. A busbar connection plate is installed on the outer end of the base body at the contact mounting area via outer fasteners. The busbar is connected to the contact assembly via the busbar connection plate.

[0007] Furthermore, in the aforementioned anti-arc and anti-electricity drawer-type circuit breaker, the outer epoxy separator includes an outer epoxy separator body. The outer epoxy separator body has side notches on both sides to facilitate the exposure of the side vertical ribs. The outer epoxy separator body has a snap-fit ​​hole in the middle to facilitate the exposure of the middle vertical rib and several rows of first windows staggered from the snap-fit ​​hole. The upper and lower parts of the outer epoxy separator body have separator mounting through holes that mate with separator mounting screw holes. Fastening screws can be screwed into the corresponding separator mounting screw holes through the separator mounting through holes.

[0008] Furthermore, in the aforementioned arc-proof drawer-type circuit breaker, the inner epoxy partition includes an inner epoxy partition body. The inner epoxy partition body has side slots on both sides for easy engagement with the side vertical ribs. The lower end of the inner epoxy partition body has a lower locking interface for easy engagement with the middle vertical rib. The upper end of the inner epoxy partition body has an upper opening for easy exposure of the partition mounting screw holes. The interior of the inner epoxy partition body has several rows of second windows that are staggered from the positions of the first window and the lower locking interface.

[0009] Furthermore, in the aforementioned anti-arc and anti-electricity drawer-type circuit breaker, an insulating nut is installed on the outer end of the external fastener.

[0010] Furthermore, in the aforementioned arc-resistant drawer-type circuit breaker, the frame side plate unit includes a frame side plate, a frame pull plate, a side plate partition, and a pull plate partition; the frame side plate includes a frame side plate body, with an upper slide rail and a lower slide rail installed side-by-side on the inner side of the frame side plate body, and a frame pull plate slidably installed between the upper slide rail and the lower slide rail; the outer wall of the frame pull plate is equipped with a snap-fit ​​groove, and steps are respectively installed at the front end of the frame side plate body at the periphery of the upper slide rail and the lower slide rail. The plate has a fixed end plate installed at the front end of the stepped plate to facilitate fixing to the bakelite base. The frame side plate body is rotatably installed between the upper slide rail and the upper stepped plate. The lifting plate can push the inner epoxy partition to move vertically along the length direction of the middle vertical rib and the side vertical rib by rotation. The side plate partition is installed on the outside of the lifting plate and the upper stepped plate to separate the phase from the ground. The frame pull plate is installed on the outside to separate the phase from the ground.

[0011] Furthermore, in the above-mentioned anti-arc and anti-electricity drawer-type circuit breaker, the side plate partition includes a first vertical partition, a transition plate, a second vertical partition, a recessed mounting plate, and a first buckle. The first vertical partition is connected to the second vertical partition through the transition plate. A recessed mounting plate is installed at the upper outer end of each of the first and second vertical partitions. A first buckle is installed at the lower outer end of each of the first and second vertical partitions to facilitate engagement with the upper slide rail.

[0012] Furthermore, in the aforementioned anti-arc and anti-electricity drawer-type circuit breaker, the pull-plate partition includes a middle horizontal partition, an upper horizontal partition, a lower horizontal partition, a second snap fastener, a concave raised plate, and a third snap fastener. The upper side of the middle horizontal partition is connected to the upper horizontal partition and the concave raised plate. The upper end of the upper horizontal partition is provided with a second snap fastener that engages with the insertion slot on the outer side of the frame pull plate. The lower side of the middle horizontal partition is connected to the lower horizontal partition, and the inner side of the lower horizontal partition is equipped with a third snap fastener that facilitates engagement with the lower slide rail.

[0013] Furthermore, in the aforementioned arc-proof drawer-type circuit breaker, the frame top plate unit includes a frame top plate, a support plate, and a current-diverting arc-blocking plate. The frame top plate is formed by a cover plate, a side plate, a rear plate, and a front plate. The front plate has several strip-shaped locking holes and several strip-shaped arc-extinguishing holes. The bottom of the strip-shaped locking holes has a lower widening opening, and the upper part of the strip-shaped locking holes has an upper widening opening. The support plate is fixed to the inner side of the front plate, and several current-diverting arc-blocking plates are installed together between the support plate and the cover plate.

[0014] Furthermore, in the aforementioned arc-proof drawer-type circuit breaker, the shunt arc-blocking plate includes a shunt arc-blocking plate body. The lower part of the shunt arc-blocking plate body has a lower notch for mounting a support plate. The upper end of the shunt arc-blocking plate body has a horizontal end plate. The horizontal end plate has a fixing hole for easy fixing to the cover plate in the top plate of the frame. The front end of the shunt arc-blocking plate body has a protruding plate. The protruding plate has a lower widening head that mates with the lower widening opening and an upper widening head that mates with the upper widening opening.

[0015] Furthermore, in the above-mentioned arc-proof drawer-type circuit breaker, the side plate partition, pull plate partition, and shunt arc-proof plate are all made of insulating plastic material.

[0016] The beneficial effects of this utility model are: 1. Excellent partitioning effect and high safety. Phase-to-phase isolation: On the base body of the bakelite base, a middle vertical rib is installed between two adjacent contact mounting areas on the inner end face, and a side vertical rib is installed on the outer side of the outermost contact mounting area. Together, they are used to snap on the outer epoxy partition and the inner epoxy partition to achieve effective phase-to-phase isolation.

[0017] Phase-to-ground isolation: Side panel partitions are installed on the outside of the raised plate and upper step plate of the frame side panel unit, and pull plate partitions are installed on the outside of the frame pull plate, effectively isolating the phase from the ground, reducing the risk of leakage and improving safety.

[0018] 2. Epoxy partitions offer stable installation and a high level of protection. Guiding design: The outer epoxy partition and the inner epoxy partition are connected by a central vertical rib and side vertical ribs. The outer epoxy partition has side notches, snap-fit ​​holes, and partition installation through holes, while the inner epoxy partition has side snap-fits, lower snap-fit ​​interfaces, and upper openings, which makes the two installed tightly and restricts the sliding of the inner epoxy partition between the outer epoxy partition and the bakelite base. The outer epoxy partition is not easy to tilt left or right when it rises, and the installation is stable.

[0019] Reasonable design: The outer epoxy partition and the inner epoxy partition are respectively equipped with the first window and the second window, and their positions are staggered. The reasonable design improves the IP protection level.

[0020] 3. Solving the problem of leakage in nuts: By optimizing the structural design, leakage problems caused by the small spacing between nuts due to the limitations of frame specifications are avoided, thus reducing safety hazards.

[0021] 4. Excellent forced arc extinguishing effect: When the circuit breaker is working, the generated arc enters the arc extinguishing chamber inside the frame top plate unit. The arc that is not completely extinguished comes out of the arc extinguishing chamber along with the heat generated during the arc extinguishing process. Since the shunt arc extinguishing plate has strip-shaped arc extinguishing holes that allow the arc to pass through, at least when the arc path is completely blocked, the arc can be extinguished again when it passes through the strip-shaped arc extinguishing holes and / or flows through the side wall and / or end face of the shunt arc extinguishing plate. This improves the arc extinguishing capability and avoids the problem of arc residue in the frame top plate unit affecting the performance and service life of the circuit breaker.

[0022] 5. The structure facilitates installation and fixing. Outer epoxy partition: The outer epoxy partition and the bakelite base are locked by screwing the fastening screws into the corresponding partition mounting screw holes through the partition mounting through holes.

[0023] Side panel partition: The first buckle is installed at the lower outer end of the first vertical partition and the second vertical partition to facilitate engagement with the upper slide rail; the upper outer end is installed with a recessed mounting plate to facilitate installation and fixation.

[0024] Pull-out partition: The upper part of the upper horizontal partition is equipped with a second buckle that engages with the insertion slot on the outside of the frame pull-out plate, and the lower horizontal partition is equipped with a third buckle on the inside to facilitate engagement with the lower rail, making installation convenient.

[0025] Diversion and Arc Baffle Plate: The lower and upper widening heads on the front convex plate of the diversion and arc baffle plate body respectively cooperate with the lower and upper widening openings of the strip-shaped card holes on the top plate of the frame. They are first inserted and then moved upward and misaligned. Then, they are clamped and fixed by the support plate and the cover plate, which makes the installation convenient.

[0026] 6. Good material insulation: The side plate partition, pull plate partition and shunt arc blocking plate are all made of insulating plastic material, which further improves the insulation performance and safety of the circuit breaker.

[0027] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a schematic diagram of the overall main structure of this utility model; Figure 3This is a rear view schematic diagram of the overall structure of this utility model; Figure 4 This is a side view of the overall structure of this utility model; Figure 5 This is a schematic diagram of the structure of the circuit breaker body of this utility model; Figure 6 This is a schematic diagram of the circuit breaker body of this utility model after omitting the outer epoxy partition; Figure 7 This is a schematic diagram of the busbar structure in this utility model; Figure 8 This is a schematic diagram of the structure of the bakelite base in this utility model; Figure 9 This is a schematic diagram of the structure of the outer epoxy separator in this utility model; Figure 10 This is a schematic diagram of the structure of the inner epoxy diaphragm in this utility model; Figure 11 This is a structural schematic diagram of the frame side plate unit in this utility model; Figure 12 This is a structural schematic diagram of the frame side plate and frame tie plate in this utility model; Figure 13 This is a structural schematic diagram of the side panel partition component at one angle in this utility model; Figure 14 This is a structural schematic diagram of the side panel partition component from another angle in this utility model; Figure 15 This is a structural schematic diagram of the pull plate partition component of this utility model at one angle; Figure 16 This is a structural schematic diagram of the pull plate partition component of this utility model from another angle; Figure 17 This is a structural schematic diagram of the frame top plate unit in this utility model; Figure 18 This is a schematic diagram of the structure of the top plate of the frame in this utility model; Figure 19 This is a schematic diagram of the flow diversion and arc-blocking plate in this utility model; In the attached diagram, the components represented by each number are as follows: 1- Drawer-type socket; 2-Frame side panel unit, 21-Frame side panel, 211-Frame side panel body, 212-Upper slide rail, 213-Lower slide rail, 214-Step plate, 215-Fixed end plate, 216-Lifting plate, 22-Frame pull plate, 221-Insertion buckle groove, 23-Side panel partition, 231-First vertical partition, 232-Transition plate, 233-Second vertical partition, 234-Concave mounting plate, 235-First buckle, 24-Pull plate partition, 241-Middle horizontal partition, 242-Upper horizontal partition, 243-Lower horizontal partition, 245-Second buckle, 246-Concave lifting plate, 247-Third buckle; 3-Frame top plate unit, 31-Frame top plate, 311-Cover plate, 312-Side plate, 313-Rear plate, 314-Front plate, 315-Strip-shaped card hole, 316-Lower widening opening, 317-Upper widening opening, 318-Strip-shaped arc extinguishing hole, 32-Support plate, 33-Diverter arc-blocking plate, 331-Diverter arc-blocking plate body, 332-Horizontal end plate, 333-Fixing hole, 334-Lower notch, 335-Protruding plate, 336-Lower widening head, 337-Upper widening head; 4-Frame base plate unit; 5-Circuit breaker body, 51-Bakelite base, 511-Base body, 512-Contact mounting area, 513-Middle vertical rib, 514-Side vertical rib, 515-Partition mounting screw hole, 52-Outer epoxy partition, 521-Outer epoxy partition body, 522-Side notch, 523-Snap-fit ​​hole, 524-First window, 525-Partition mounting through hole, 53-Inner epoxy partition, 531-Inner epoxy partition body, 532-Side snap-fit, 533-Upper opening, 534-Lower snap-fit ​​interface, 535-Second window, 54-Outer fastener, 55-Busbar connection plate, 56-Busbar. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1-4 As shown, this embodiment is an arc-proof drawer-type circuit breaker, including a drawer-type socket 1, a frame and a circuit breaker body 5. The frame is a rectangular frame formed by two frame side plate units 2, a frame top plate unit 3 and a frame bottom plate unit 4. The drawer-type socket 1 is inserted into the rear of the frame and the circuit breaker body 5 is installed at the front of the frame.

[0032] like Figures 5-8As shown, the circuit breaker body 5 includes a bakelite base 51, an outer epoxy partition 52, an inner epoxy partition 53, an outer fastener 54, a busbar connection plate 55, a busbar 56, and a contact assembly. The bakelite base 51 includes a base body 511, which has multiple contact mounting areas 512 arranged in a rectangular array for mounting the contact assembly. A central vertical rib 513, capable of separating phases, is installed on the inner end face of the base body 511 between two adjacent contact mounting areas 512 in the same row. Side vertical ribs 514 are installed on the inner end face of the base body 511 outside the outermost contact mounting area 512. Multiple partition mounting screw holes 515 are provided on the upper and lower edges of the inner end face of the base body 511. The outer epoxy partition 52 and the inner epoxy partition 53 are jointly secured to the inner end of the base body 511 using the central vertical rib 513 and the side vertical ribs 514. The base body 511 is located at the outer end of the contact mounting area 512 and is fitted with a busbar connecting plate 55 via an external fastener 54. The busbar 56 is connected to the contact assembly via the busbar connecting plate 55.

[0033] like Figure 9 As shown, the outer epoxy diaphragm 52 includes an outer epoxy diaphragm body 521. The outer epoxy diaphragm body 521 has side notches 522 on both sides to expose the side vertical ribs 514. The outer epoxy diaphragm body 521 has a snap-fit ​​hole 523 in the middle to expose the middle vertical rib 513 and several rows of first windows 524 that are offset from the snap-fit ​​hole 523. The upper and lower parts of the outer epoxy diaphragm body 521 have diaphragm mounting through holes 525 that mate with the diaphragm mounting screw holes 515. The fastening screws can be screwed into the corresponding diaphragm mounting screw holes 515 through the diaphragm mounting through holes 525, thereby locking the outer epoxy diaphragm 52 and the bakelite base 51. The inner epoxy diaphragm 53 slides and is restricted to the area between the outer epoxy diaphragm 52 and the bakelite base 51.

[0034] like Figure 10 As shown, the inner epoxy partition 53 includes an inner epoxy partition body 531. The inner epoxy partition body 531 has side slots 532 on both sides for easy snapping of the side vertical ribs 514. The lower end of the inner epoxy partition body 531 has a lower snap-fit ​​interface 534 for easy snapping of the middle vertical rib 513. The upper end of the inner epoxy partition body 531 has an upper opening 533 for easy exposure of the partition mounting screw holes 515. The inner epoxy partition body 531 has several rows of second windows 535 installed inside, which are offset from the positions of the first window 524 and the lower snap-fit ​​interface 534.

[0035] In this embodiment, an insulating nut is installed on the outer end of the outer fastener 54.

[0036] like Figures 11-12As shown, the frame side panel unit 2 includes a frame side panel 21, a frame pull plate 22, a side panel partition 23, and a pull plate partition 24. The frame side panel 21 includes a frame side panel body 211. An upper slide rail 212 and a lower slide rail 213 are installed side by side on the inner side of the frame side panel body 211. A frame pull plate 22 is slidably installed between the upper slide rail 212 and the lower slide rail 213. A snap-fit ​​groove 221 is installed on the outer side wall of the frame pull plate 22. A step plate 214 is installed at the front end of the frame side panel body 211, located around the upper slide rail 212 and the lower slide rail 213. A fixing end plate 215 is installed at the front end of the step plate 214 to facilitate fixing to the bakelite base 51. The frame side plate body 211 is rotatably mounted with a lifting plate 216 between the upper slide rail 212 and the upper step plate 214. The lifting plate 216 can push the inner epoxy partition 53 to move vertically along the length of the middle vertical rib 513 and the side vertical rib 514 by rotation. The side plate partition 23 is installed on the outside of the lifting plate 216 and the upper step plate 214 to separate the phase from the ground. The frame pull plate 22 is installed on the outside of the pull plate 22 to separate the phase from the ground.

[0037] like Figures 13-14 As shown, the side panel partition 23 includes a first vertical partition 231, a transition plate 232, a second vertical partition 233, a recessed mounting plate 234, and a first buckle 235. The first vertical partition 231 is connected to the second vertical partition 233 through the transition plate 232. The recessed mounting plate 234 is installed at the upper outer end of each of the first vertical partition 231 and the second vertical partition 233. The first buckle 235 is installed at the lower outer end of each of the first vertical partition 231 and the second vertical partition 233 to facilitate engagement with the upper slide rail 212.

[0038] like Figures 15-16 As shown, the pull-plate partition 24 includes a middle horizontal partition 241, an upper horizontal partition 242, a lower horizontal partition 243, a second buckle 245, a recessed raised plate 246, and a third buckle 247. The upper side of the middle horizontal partition 241 is connected to the upper horizontal partition 242 and the recessed raised plate 246. The upper end of the upper horizontal partition 242 is provided with a second buckle 245 that cooperates with the insertion groove 221 on the outside of the frame pull plate 22. The lower horizontal partition 243 is connected to the lower side of the middle horizontal partition 241. The inner side of the lower horizontal partition 243 is equipped with a third buckle 247 that facilitates engagement with the lower slide rail 213.

[0039] like Figures 17-18As shown, the frame top plate unit 3 includes a frame top plate 31, a support plate 32, and a flow diversion and arc-extinguishing plate 33. The frame top plate 31 is formed by a cover plate portion 311, a side plate portion 312, a rear plate portion 313, and a front plate portion 314. The side plate portions 312 are symmetrically arranged on the left and right sides of the cover plate portion 311, the rear plate portion 313 is located at the rear end of the cover plate portion 311, and the front plate portion 314 is an L-shaped plate portion located at the front end of the cover plate portion 311. The vertical plate portion of the front plate portion 314 has several strip-shaped locking holes 315 and several strip-shaped arc-extinguishing holes 318. The bottom end of the strip-shaped locking holes 315 has a lower widening opening 316, and the upper part of the strip-shaped locking holes 315 has an upper widening opening 317. The support plate 32 is fixed to the inner side of the front plate portion 314, and several flow diversion and arc-extinguishing plates 33 are installed between the support plate 32 and the cover plate portion 311.

[0040] like Figure 19 As shown, the diversion and arc-blocking plate 33 includes a diversion and arc-blocking plate body 331. The lower part of the diversion and arc-blocking plate body 331 is provided with a lower notch 334 that cooperates with the support plate 32. The upper end of the diversion and arc-blocking plate body 331 is provided with a horizontal end plate 332. The horizontal end plate 332 is provided with a fixing hole 333 for easy fixing with the cover plate part 311 in the frame top plate 31. The front end of the diversion and arc-blocking plate body 331 is provided with a protruding plate 335. The protruding plate 335 is provided with a lower widening head 336 that cooperates with the lower widening opening 316 and an upper widening head 337 that cooperates with the upper widening opening 317. During installation, first, insert the lower widening head 336 and upper widening head 337 of the diversion arc-blocking plate 33 into the lower widening opening 316 and upper widening opening 317 of the frame top plate 31, respectively. Then, move the diversion arc-blocking plate 33 upward, causing the lower widening head 336 and upper widening head 337 to be misaligned with the corresponding lower widening opening 316 and upper widening opening 317. The lower widening head 336 and upper widening head 337 cannot move back and forth due to being blocked by the narrow strip-shaped locking hole 315. Then, use the support plate 32 and the cover plate 311 to clamp and fix the diversion arc-blocking plate 33. By adding the diversion arc-blocking plate, when the main body is driven, it effectively isolates and diverts unexpected and uncertain objects, while also enhancing the IP protection level. In this embodiment, the side plate partition 23, the pull plate partition 24, and the flow diversion arc baffle 33 are all made of insulating plastic material.

[0041] One specific application of this embodiment is: 1. Working principle of isolation: During the operation of the circuit breaker, the middle vertical rib and the side vertical rib on the bakelite base separate the contact installation areas of different phases. The outer epoxy partition and the inner epoxy partition further enhance the isolation effect between phases by snapping with the vertical rib. The side plate partition and the pull plate partition on the frame side plate unit isolate the phase from the ground at the corresponding positions to prevent abnormal current flow between the phase and the ground and reduce the occurrence of leakage accidents.

[0042] 2. Working principle of the epoxy partition: The outer epoxy partition is fixed to the bakelite base with fastening screws, and the inner epoxy partition is slidably installed between the outer epoxy partition and the bakelite base. When it is necessary to operate the inner epoxy partition, the inner epoxy partition is pushed vertically along the length of the middle vertical rib and the side vertical rib by rotating the lifting plate, so as to realize the corresponding function of the epoxy partition. During the displacement, due to the guiding design, the outer epoxy partition will not tilt left or right, ensuring the stability of installation and use.

[0043] 3. Excellent forced arc extinguishing effect: When the circuit breaker is working, the generated arc enters the arc extinguishing chamber inside the frame top plate unit. The arc that is not completely extinguished comes out of the arc extinguishing chamber along with the heat generated during the arc extinguishing process. Since the shunt arc extinguishing plate has strip-shaped arc extinguishing holes that allow the arc to pass through, at least when the arc path is completely blocked, the arc can be extinguished again when it passes through the strip-shaped arc extinguishing holes and / or flows through the side wall and / or end face of the shunt arc extinguishing plate. This improves the arc extinguishing capability and avoids the problem of arc residue in the frame top plate unit affecting the performance and service life of the circuit breaker.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to specific implementation methods. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A drawer-type circuit breaker with anti-electric arc protection, characterized in that, The device includes a drawer-type socket, a frame, and a circuit breaker body. The frame is a rectangular frame formed by two frame side plate units, a frame top plate unit, and a frame bottom plate unit. A drawer-type socket is inserted into the rear of the frame, and a circuit breaker body is installed at the front of the frame. The circuit breaker body includes a bakelite base, an outer epoxy partition, an inner epoxy partition, outer fasteners, a busbar connection plate, a busbar, and a contact assembly. The bakelite base includes a base body, which has multiple contact mounting areas arranged in a rectangular array for mounting the contact assembly. A central vertical rib is installed on the inner end face of the base body between two adjacent contact mounting areas in the same row to separate phases. A side vertical rib is installed on the inner end face of the base body outside the outermost contact mounting area. Multiple partition mounting screw holes are provided on the upper and lower edges of the inner end face of the base body. The outer epoxy partition and inner epoxy partition are mounted on the inner end of the base body using the central and side vertical ribs. A busbar connection plate is installed on the outer end of the base body at the contact mounting area via outer fasteners. The busbar is connected to the contact assembly via the busbar connection plate.

2. The drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 1, characterized in that, The outer epoxy separator includes an outer epoxy separator body. The outer epoxy separator body has side notches on both sides to expose the side vertical ribs. The outer epoxy separator body has snap-fit ​​holes in the middle to expose the middle vertical ribs and several rows of first windows staggered from the snap-fit ​​holes. The upper and lower parts of the outer epoxy separator body have separator mounting through holes that mate with separator mounting screw holes. Fastening screws can be screwed into the corresponding separator mounting screw holes through the separator mounting through holes.

3. The drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 2, characterized in that, The inner epoxy diaphragm includes an inner epoxy diaphragm body. The inner epoxy diaphragm body has side slots on both sides for easy snapping with the side vertical ribs. The lower end of the inner epoxy diaphragm body has a lower snap-fit ​​interface for easy snapping with the middle vertical rib. The upper end of the inner epoxy diaphragm body has an upper opening for easy exposure of the diaphragm mounting screw holes. The interior of the inner epoxy diaphragm body has several rows of second windows that are staggered from the positions of the first window and the lower snap-fit ​​interface.

4. The drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 3, characterized in that, An insulating nut is installed on the outer end of the external fastener.

5. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 4, characterized in that, The frame side panel unit includes a frame side panel, a frame pull plate, a side panel partition, and a pull plate partition. The frame side panel includes a frame side panel body. An upper slide rail and a lower slide rail are installed side-by-side on the inner side of the frame side panel body. A frame pull plate is slidably installed between the upper slide rail and the lower slide rail. A snap-fit ​​groove is installed on the outer side wall of the frame pull plate. A step plate is installed at the front end of the frame side panel body at the periphery of the upper slide rail and the lower slide rail. A fixing end plate is installed at the front end of the step plate to facilitate fixing to the bakelite base. A lifting plate is rotatably installed between the upper slide rail and the upper step plate of the frame side panel body. The lifting plate can push the inner epoxy partition to move vertically along the length direction of the middle vertical rib and the side vertical rib by rotation. The side panel partition is installed on the outer side of the lifting plate and the upper step plate to separate the phase from the ground. A pull plate partition is installed on the outer side of the frame pull plate to separate the phase from the ground.

6. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 5, characterized in that, The side panel partition includes a first vertical partition, a transition plate, a second vertical partition, a recessed mounting plate, and a first buckle. The first vertical partition is connected to the second vertical partition through the transition plate. A recessed mounting plate is installed at the upper outer end of each of the first and second vertical partitions. A first buckle is installed at the lower outer end of each of the first and second vertical partitions to facilitate engagement with the upper slide rail.

7. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 6, characterized in that, The pull-plate partition includes a middle horizontal partition, an upper horizontal partition, a lower horizontal partition, a second buckle, a concave raised plate, and a third buckle. The upper side of the middle horizontal partition is connected to the upper horizontal partition and the concave raised plate. The upper end of the upper horizontal partition is provided with a second buckle that engages with the insertion groove on the outer side of the frame pull plate. The lower side of the middle horizontal partition is connected to the lower horizontal partition. The inner side of the lower horizontal partition is equipped with a third buckle that facilitates engagement with the lower slide rail.

8. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 7, characterized in that, The frame top plate unit includes a frame top plate, a support plate, and a diversion arc-blocking plate. The frame top plate is formed by a cover plate, a side plate, a rear plate, and a front plate. The front plate has several strip-shaped locking holes and several strip-shaped arc-extinguishing holes. The bottom of the strip-shaped locking holes has a lower widening opening, and the upper part of the strip-shaped locking holes has an upper widening opening. The support plate is fixed to the inner side of the front plate. Several diversion arc-blocking plates are installed between the support plate and the cover plate.

9. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 8, characterized in that, The diversion arc-blocking plate includes a diversion arc-blocking plate body. The lower part of the diversion arc-blocking plate body has a lower notch for cooperating with a support plate. The upper end of the diversion arc-blocking plate body has a horizontal end plate. The horizontal end plate has a fixing hole for easy fixing to the cover plate part of the frame top plate. The front end of the diversion arc-blocking plate body has a protruding plate. The protruding plate has a lower widening head that cooperates with the lower widening opening and an upper widening head that cooperates with the upper widening opening.

10. A drawer-type circuit breaker with anti-arc and anti-electricity properties according to claim 9, characterized in that, The side panel partition, pull plate partition, and flow diversion arc baffle are all made of insulating plastic material.

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