Interphase partition plate of circuit breaker

Abstract

The utility model discloses a phase partition plate of a circuit breaker, and relates to the technical field of circuit breakers, and the circuit breaker comprises a first side wall provided with an exhaust channel and a second side wall provided with a busbar. And each phase partition plate comprises an arc isolating part and an insulating part which are integrally formed. The arc isolating part is connected with the first side wall through a first connecting structure and used for isolating an exhaust channel on the first side wall, and the insulating part is connected with the second side wall through a second connecting structure and used for isolating a busbar on the second side wall. According to the phase partition plate of the circuit breaker, the separation effect on charged particles discharged by the adjacent arc extinguish chambers can be improved, and therefore the breaking performance of the circuit breaker is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a phase-to-phase partition plate of a circuit breaker. BACKGROUND

[0002] The phase-to-phase partition plate is a key component of a universal circuit breaker, mainly used for realizing phase-to-phase electrical isolation and insulation protection. Its performance directly affects the safety and reliability of the circuit breaker, especially under high-voltage and large-current working conditions. The insulation and isolation capacity of the phase-to-phase partition plate is crucial for preventing phase-to-phase short-circuit faults.

[0003] During high-voltage and large-current breaking or electrical life testing, strong arc burning phenomena occur in the arc extinguishing chamber of the circuit breaker, accompanied by a large amount of high-temperature and high-pressure ionized gas being discharged from the arc extinguishing chamber. These ionized gases contain high-energy charged particles. If the charged particles discharged from the arc extinguishing chambers of adjacent two phases are subjected to breakdown, it may lead to phase-to-phase insulation failure, and further cause phase-to-phase short-circuit faults.

[0004] Therefore, it is urgent to improve the phase-to-phase partition plate to improve the breaking performance and electrical life reliability of the circuit breaker under high-voltage working conditions. SUMMARY

[0005] The purpose of the present application is to provide a phase-to-phase partition plate of a circuit breaker, which can improve the separation effect of charged particles discharged from adjacent arc extinguishing chambers, thereby improving the breaking performance of the circuit breaker.

[0006] The embodiment of the present application provides a phase-to-phase partition plate of a circuit breaker, the circuit breaker comprising a first side wall provided with an exhaust passage and a second side wall provided with a busbar. The phase-to-phase partition plate comprises an arc separation part and an insulation part which are integrally formed. The arc separation part is connected to the first side wall through a first connecting structure and is used for separating the exhaust passage on the first side wall. The insulation part is connected to the second side wall through a second connecting structure and is used for separating the busbar on the second side wall.

[0007] By simultaneously providing the arc separation part and the insulation part on the phase-to-phase partition plate, the arc separation part separates the exhaust passage on the first side wall, which can effectively reduce the possibility of breakdown of charged particles between ionized gases discharged from adjacent two-phase arc extinguishing chambers, avoid the situation that arcs cannot be extinguished at the exhaust passages of adjacent two phases, and effectively improve the breaking performance of the circuit breaker. At the same time, the insulation part separates the busbar on the second side wall to reduce the possibility of phase-to-phase short-circuit between adjacent two-phase busbars, further improve the breaking performance of the circuit breaker, and satisfy the reliable breaking capacity of the circuit breaker when controlling high-voltage and large-current breaking.

[0008] In some examples, the first connecting structure comprises a clamping boss provided on the arc separation part and a clamping groove provided on the first side wall, and the clamping boss and the clamping groove correspondingly clamp.

[0009] By adopting the first connecting structure of the clamping boss and the clamping groove, the embodiment not only realizes the quick and reliable connection between the arc separation part and the first side wall, but also significantly improves the assembly efficiency and maintenance convenience of the circuit breaker. At the same time, this design can effectively adapt to the mechanical and electrical requirements under high-voltage and large-current working conditions, further improving the overall performance and reliability of the circuit breaker.

[0010] In some examples, the second side wall is provided with a relief hole, the relief hole is in communication with the clamping groove, and the clamping boss can be inserted into the clamping groove from the relief hole.

[0011] The design of the relief hole provides a clear sliding path for the clamping boss. Through the guiding effect of the relief hole, the clamping boss can be smoothly inserted into the clamping groove, effectively simplifying the assembly steps, avoiding assembly errors, and improving the assembly efficiency.

[0012] In some examples, the cross section of the combination of the clamping boss and the arc separation part is T-shaped, and the cross section shape of the clamping groove corresponds to the cross section shape of the combination of the clamping boss and the arc separation part.

[0013] This setting form can increase the contact area between the clamping boss and the clamping groove on the one hand, and can realize the clamping of the clamping groove on both sides of the arc separation part on the other hand, effectively improving the connection stability of the first connecting structure.

[0014] In some examples, the end of the clamping boss away from the insulating part is provided with a first chamfer, and the hole wall of the relief hole is provided with a second chamfer, and when the end of the clamping boss away from the insulating part is provided with the first chamfer and the hole wall of the relief hole is provided with the second chamfer, the first chamfer and the second chamfer are matched.

[0015] By setting the first chamfer and / or the second chamfer, the clamping boss can be positioned and inserted into the relief hole, which simplifies the assembly process of the clamping boss and the relief hole, and significantly improves the assembly accuracy and efficiency. At the same time, the chamfer design can effectively reduce friction and wear during assembly, further improving the assembly quality and long-term reliability of the circuit breaker.

[0016] In some examples, the second connecting structure includes a fastener provided on the insulating part and a fastening hole provided on the second side wall, and the fastener and the fastening hole are connected correspondingly.

[0017] The cooperation of the fastener and the fastening hole can ensure that the insulating part and the second side wall are always firmly connected, effectively reducing the risk of the interphase spacer separating from the circuit breaker. At the same time, the direction of inserting the fastener into the fastening hole is the same as the direction of inserting the clamping boss into the clamping groove, so that only one direction needs to be installed during assembly. This consistent design simplifies the assembly process and improves the assembly efficiency.

[0018] In some examples, the fastener is configured as a screw, the fastening hole is configured as a screw hole, or the fastener is configured as a buckle, and the fastening hole is configured as a buckling hole.

[0019] Whether it is the cooperation of the screw and the screw hole or the cooperation of the buckle and the buckling hole, the fixed connection of the insulation part and the second side wall can be achieved, and the connection is stable and reliable, the structure is simple, the assembly operation is convenient, and the assembly efficiency is high.

[0020] In some examples, the insulation part is provided with a widened structure, and the side of the widened structure close to the second side wall abuts against the second side wall.

[0021] By setting the widened structure and making the side close to the second side wall abut against the second side wall, the contact area of the insulation part and the second side wall is increased, and the insulation performance and mechanical stability between the insulation part and the second side wall are enhanced. At the same time, this design can increase the creepage distance between adjacent two phases, which is beneficial to reduce the risk of phase-to-phase short circuit.

[0022] In some examples, the insulation part is further provided with an extension, and the second side wall is provided with a receiving groove, and the extension is inserted into the receiving groove in correspondence.

[0023] By setting the extension and inserting it into the receiving groove on the second side wall, not only the connection stability and insulation performance between the insulation part and the second side wall are enhanced, but also the assembly process is significantly simplified and the assembly precision is improved. At the same time, this design can effectively adapt to the electrical and mechanical requirements under high-voltage and large-current conditions, further improving the overall performance and reliability of the circuit breaker.

[0024] In some examples, the arc separation part and / or the insulation part is provided with a rib plate.

[0025] The rib plate provided on the arc separation part can effectively enhance the structural strength of the arc separation part, reduce the risk of bending or swinging of the arc separation part due to excessive area and small thickness, and is beneficial to reduce the risk of phase-to-phase short circuit. Similarly, the rib plate provided on the insulation part has the same technical effect, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The overall structure schematic diagram of the circuit breaker and the phase-to-phase spacer assembly provided by the embodiments of the present application is shown in the figure.

[0028] Figure 2 A cross-sectional view at A-A in FIG. 1; Figure 1

[0029] Figure 3 A cross-sectional view at A-A in FIG. 1; Figure 2

[0030] Figure 4 A schematic view of the overall structure of the circuit breaker provided by the embodiment of the present application;

[0031] Figure 5 A cross-sectional view at A-A in FIG. 1; Figure 4

[0032] Figure 6 A first perspective view of the phase spacing plate provided by the embodiment of the present application;

[0033] Figure 7 A second perspective view of the phase spacing plate provided by the embodiment of the present application.

[0034] The reference signs: 100, circuit breaker; 200, phase spacing plate; 1, exhaust passage; 2, busbar; 3, first side wall; 31, clamping groove; 4, second side wall; 41, avoiding hole; 42, fastening hole; 43, accommodating groove; 5, arc spacing part; 51, clamping boss; 511, first chamfer; 6, insulation part; 61, fastener; 62, screw mounting plate; 63, widened structure; 631, rib plate; 64, extension. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0037] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] ​​​In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "in", "out", etc. are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In a common universal circuit breaker, at least two phases are usually included, each phase includes a busbar and an arc extinguishing chamber, the busbar is used to connect an external circuit, and the arc extinguishing chamber is used to extinguish an electric arc and discharge ionized gas from an exhaust passage on the circuit breaker. The prior art usually sets an inter-phase partition plate between the busbars of the adjacent two phases to prevent the occurrence of an inter-phase short circuit fault.

[0041] However, when the circuit breaker controls high-voltage and large-current breaking, a large amount of high-temperature and high-pressure ionized gas is generated with the burning of the electric arc, the arc extinguishing chambers of the adjacent two phases respectively discharge these gases from the corresponding exhaust passages, and the charged particles in these gases are easy to be broken down when they are close to each other, which also causes an inter-phase short circuit. Therefore, the existing circuit breaker still has the defect of unstable breaking performance.

[0042] Based on this, the embodiments of the present application provide an inter-phase partition plate of a circuit breaker, which can improve the separation effect of the charged particles discharged by the adjacent arc extinguishing chambers, thereby improving the breaking performance of the circuit breaker.

[0043] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0044] Please refer to Figure 1 The embodiments provide an inter-phase partition plate 200 of a circuit breaker 100, the circuit breaker 100 includes a first side wall 3 provided with an exhaust passage 1 and a second side wall 4 provided with a busbar 2. The inter-phase partition plate 200 includes an arc separation part 5 and an insulation part 6 which are integrally formed. The arc separation part 5 is connected with the first side wall 3 through a first connecting structure, and is used to separate the exhaust passage 1 on the first side wall 3. The insulation part 6 is connected with the second side wall 4 through a second connecting structure, and is used to separate the busbar 2 on the second side wall 4.

[0045] By setting the arc separation part 5 and the insulation part 6 on the phase spacing plate 200 at the same time, the ionized gas discharged by the exhaust channel 1 located on the first side wall 3 is separated by the arc separation part 5, which can effectively reduce the possibility of charged particle breakdown between the ionized gas discharged by the exhaust channel 1 of the adjacent two phases, avoid the situation that the arc cannot be extinguished at the exhaust channel 1 of the adjacent two phases, and effectively improve the breaking performance of the circuit breaker 100. At the same time, the busbar 2 located on the second side wall 4 is separated by the insulation part 6 to reduce the possibility of phase-to-phase short circuit between the busbar 2 of the adjacent two phases, further improve the breaking performance of the circuit breaker 100, and meet the reliable breaking capacity of the circuit breaker 100 when controlling high-voltage and large-current breaking.

[0046] Specifically, referring to Figure 1 , the first side wall 3 and the second side wall 4 are two adjacent side walls on the circuit breaker 100, the first side wall 3 is provided with a plurality of exhaust channels 1, and each phase on the circuit breaker 100 corresponds to a separate exhaust channel 1, so as to correspond to the high-temperature and high-pressure ionized gas generated in each phase arc extinction chamber. The second side wall 4 is provided with a plurality of busbars 2, and the plurality of busbars 2 also correspond to each phase in the circuit breaker 100, so as to realize the electrical connection between each phase and the external circuit.

[0047] The arc separation part 5 is connected with the first side wall 3 through the first connecting structure, and the first connecting structure can adopt a connection form such as buckle, bolt or welding, which has high connection strength to ensure the firm connection between the arc separation part 5 and the first side wall 3.

[0048] Each arc separation part 5 is located between the adjacent two exhaust channels 1 on the first side wall 3, and the arc separation part 5 is perpendicular to the first side wall 3. The arc separation part 5 extends to the exhaust direction of the exhaust channel 1 based on the first side wall 3, which can better separate the ionized gas discharged by the adjacent two phases in the exhaust direction of the exhaust channel 1, and effectively reduce the possibility of charged particle breakdown. The material of the arc separation part 5 is preferably an insulating material resistant to high temperature and arc, such as ceramic or high-performance engineering plastic.

[0049] Referring to Figure 1 , the overall shape of the phase spacing plate 200 is similar to the shape of “┑”, the arc separation part 5 is a horizontal structure therein, and the insulation part 6 is a vertical structure therein. The two are arranged at an angle, which can be a right angle, to adapt to the adjacent first side wall 3 and second side wall 4. Further, the arc separation part 5 and the insulation part 6 are both plate structures and are in the same plane.

[0050] The insulation part 6 is connected with the second side wall 4 through a second connecting structure, which can be in the form of insertion, clamping or screw fixing, so as to realize reliable connection of the insulation part 6 and the second side wall 4. The insulation part 6 is located between the busbars 2 of two adjacent phases on the second side wall 4, and is perpendicular to the second side wall 4. The height of the insulation part 6 is adapted to the height of the busbars 2 based on the second side wall 4, so as to more comprehensively separate the busbars 2 of two adjacent phases and reduce the possibility of phase-to-phase short circuit. Preferably, the material of the insulation part 6 is a material with high insulation strength and aging resistance, such as epoxy resin or glass fiber reinforced plastic.

[0051] The arc separation part 5 and the insulation part 6 of the phase-to-phase partition plate 200 are designed in one piece, which simplifies the manufacturing process, saves the assembly process of the arc separation part 5 and the insulation part 6, and improves the mechanical strength and durability of the phase-to-phase partition plate 200.

[0052] Referring to Figures 1 to 3 In some examples, the first connecting structure includes a clamping boss 51 arranged on the arc separation part 5, and a clamping groove 31 arranged on the first side wall 3, and the clamping boss 51 and the clamping groove 31 correspondingly clamp.

[0053] By using the first connecting structure of the clamping boss 51 and the clamping groove 31, the embodiment not only realizes quick and reliable connection between the arc separation part 5 and the first side wall 3, but also significantly improves the assembly efficiency and maintenance convenience of the circuit breaker 100. At the same time, this design can effectively adapt to the mechanical and electrical requirements under high-voltage and large-current conditions, further improving the overall performance and reliability of the circuit breaker 100.

[0054] Referring to Figure 3 The clamping boss 51 is located on one side of the arc separation part 5 close to the first side wall 3, and the clamping boss 51 can be designed in T shape, dovetail shape, rectangular shape, circular shape or other geometric shapes, and the clamping groove 31 is correspondingly designed as a groove structure with a corresponding shape. The clamping boss 51 is inserted into the clamping groove 31 to ensure the stability and firmness of clamping.

[0055] The clamping boss 51 can also be provided as an elastic structure. During installation, the clamping boss 51 can be aligned with the clamping groove 31 and a certain pressure is applied, so that the clamping boss 51 deforms appropriately. After the deformed clamping boss 51 enters the clamping groove 31, it fully recovers or partially recovers to realize tight clamping of the clamping boss 51 and the clamping groove 31.

[0056] The above two connection modes do not need to use additional fasteners (such as bolts or screws), which simplifies the installation steps, improves the assembly efficiency, and has a simple structure and is easy to process. Adhesive or welding connection can also be used, which also has the characteristics of stable connection and easy assembly.

[0057] Referring toFigures 3 to 5 In some examples, the second side wall 4 is provided with an avoiding hole 41, which is in communication with the clamping groove 31, and the clamping boss 51 can be inserted into the clamping groove 31 from the avoiding hole 41.

[0058] The avoiding hole 41 provides a clear sliding path for the clamping boss 51, and through the guiding effect of the avoiding hole 41, the clamping boss 51 can be smoothly inserted into the clamping groove 31, effectively simplifying the assembly steps, avoiding assembly errors, and improving the assembly efficiency.

[0059] Referring to Figure 5 , the avoiding hole 41 is arranged at the position where the first side wall 3 and the second side wall 4 intersect, and the axis of the avoiding hole 41 is the same as that of the clamping groove 31. In the process of connecting the arc separation part 5 to the first side wall 3, the clamping boss 51 only needs to be aligned with the avoiding hole 41 and inserted, so that the clamping boss 51 can be slid into the clamping groove 31.

[0060] In an alternative embodiment, the avoiding hole 41 and the clamping groove 31 can be provided with anti-skid lines or layers to improve the sliding friction of the clamping boss 51 in the avoiding hole 41 and the clamping groove 31, thereby preventing the clamping boss 51 from accidentally sliding out of the avoiding hole 41 and the clamping groove 31, and facilitating the improvement of assembly reliability.

[0061] The size and shape of the avoiding hole 41 are matched with those of the clamping boss 51, and the avoiding hole 41 can be designed as a rectangle, a circle or other geometric shapes.

[0062] Referring to Figure 3 and Figure 5 , in some examples, the cross section of the combination of the clamping boss 51 and the arc separation part 5 is configured as a T shape, and the cross section shape of the clamping groove 31 corresponds to the cross section shape of the combination of the clamping boss 51 and the arc separation part 5.

[0063] This setting form can increase the contact area between the clamping boss 51 and the clamping groove 31 on the one hand, and can realize clamping with the clamping groove 31 on both sides of the arc separation part 5 on the other hand, effectively improving the connection stability of the first connection structure.

[0064] The clamping boss 51 and the arc separation part 5 together form a T-shaped cross section, Figure 3 which is specifically manifested as an inverted T shape, the arc separation part is a vertical structure in the inverted T shape, and the clamping boss 51 is a bottom horizontal structure, and the clamping boss 51 protrudes in two opposite directions based on the arc separation part 5. The cross section shapes of the avoiding hole 41 and the clamping groove 31 are the same as that of the clamping boss 51, and such a clamping boss 51 inserted into the clamping groove 31 can avoid the arc separation part 5 from being separated from the direction perpendicular to the first side wall 3, and the interference fit of the clamping boss 51 and the clamping groove 31 can effectively improve the assembly stability.

[0065] In an optional embodiment, the clamping protrusion 51 can be provided in a dovetail shape, and the clamping groove 31 and the escape hole 41 are correspondingly provided in a dovetail shape. By virtue of the structural feature of the dovetail shape being narrow at the top and wide at the bottom, the clamping protrusion 51 inserted into the clamping groove 31 cannot be taken out of the clamping groove 31 from the opening of the clamping groove 31, and has certain assembly reliability.

[0066] With reference to Figure 5 and Figure 6 In some examples, the end of the clamping protrusion 51 away from the insulating portion 6 is provided with a first chamfer 511. In addition, the hole wall of the escape hole 41 is provided with a second chamfer. When the end of the clamping protrusion 51 away from the insulating portion 6 is provided with the first chamfer 511, and the hole wall of the escape hole 41 is provided with the second chamfer, the first chamfer 511 is matched with the second chamfer.

[0067] By providing the first chamfer 511 and / or the second chamfer, the clamping protrusion 51 and the escape hole 41 can be positioned and assisted when being inserted, so that the clamping protrusion 51 can be accurately and quickly inserted into the escape hole 41, the assembly process of the clamping protrusion 51 and the escape hole 41 is simplified, and the assembly precision and efficiency are significantly improved. At the same time, the chamfer design can effectively reduce friction and wear during assembly, and further improve the assembly quality and long-term reliability of the circuit breaker 100.

[0068] With reference to Figure 6 The first chamfer 511 is arranged at the end of the clamping protrusion 51 away from the insulating portion 6. During assembly, the end of the clamping protrusion 51 away from the insulating portion 6 first contacts the escape hole 41, and the arrangement of the first chamfer 511 can provide a guiding effect, so that the clamping protrusion 51 can be smoothly inserted into the escape hole 41 and the clamping groove 31.

[0069] The escape hole 41 can be provided with a second chamfer, or can not be provided with a second chamfer. When the second chamfer is provided, it needs to be in the same guiding direction as the first chamfer 511, and both point to the center position of the escape hole 41. In this way, they can cooperate with each other during assembly, which is conducive to the quick and accurate assembly of the clamping protrusion 51 and the clamping groove 31.

[0070] In the present embodiment, only the first chamfer 511 is provided, and the clamping protrusion 51 can be smoothly inserted into the escape hole 41 only by the first chamfer 511, and the structure is relatively simple.

[0071] With reference to Figures 4 to 7 In some examples, the second connecting structure includes a fastener 61 arranged on the insulating portion 6, and a fastening hole 42 arranged on the second side wall 4, and the fastener 61 is connected to the fastening hole 42 in a corresponding manner.

[0072] The cooperation of the fastener 61 and the fastening hole 42 can ensure that the insulation part 6 and the second side wall 4 are always firmly connected, effectively reducing the risk of the phase spacing plate 200 being detached from the circuit breaker 100. At the same time, the direction in which the fastener 61 is inserted into the fastening hole 42 is the same as the direction in which the clamping boss 51 is inserted into the clamping groove 31, so that only one direction needs to be installed during assembly, and this consistent design simplifies the assembly process and improves assembly efficiency.

[0073] During assembly, the operator first aligns the clamping boss 51 of the arc separation part 5 with the clamping groove 31 on the first side wall 3 and inserts it, and then aligns the fastener 61 of the insulation part 6 with the fastening hole 42 on the second side wall 4 and inserts it in the same direction. Because the direction in which the fastener 61 is inserted is consistent with the direction in which the clamping boss 51 is inserted, the operator does not need to adjust the assembly angle to complete the synchronous fixing of the arc separation part 5 and the insulation part 6.

[0074] Referring to Figures 3 to 6 In some examples, the fastener 61 is configured as a screw, the fastening hole 42 is configured as a screw hole, or the fastener 61 is configured as a buckle, and the fastening hole 42 is configured as a clamping hole.

[0075] Whether it is the cooperation of a screw and a screw hole or the cooperation of a buckle and a clamping hole, the fixed connection of the insulation part 6 and the second side wall 4 can be achieved, and the connection is stable and reliable, the structure is simple, the assembly operation is convenient, and the assembly efficiency is high.

[0076] In this embodiment, referring to Figure 4 and Figure 6 the fastener 61 is a screw, and the fastening hole 42 is a screw hole. The side of the insulation part 6 close to the second side wall 4 is provided with a screw mounting plate 62, and the screw mounting plate 62 is symmetrically arranged on both sides of the insulation part 6. The provision of the screw mounting plate 62 can provide a mounting position for the screw, so as to fix the phase spacing plate 200 to the second side wall 4 by the screw. On the other hand, it can increase the contact area between the insulation part 6 and the second side wall 4, so as to improve the assembly stability and reduce the possibility of the insulation part 6 shaking relative to the second side wall 4.

[0077] In an alternative embodiment, the screw can be a self-tapping screw, a mechanical screw, or other types of threaded connectors, and the head thereof can be designed in the form of a cross slot, a straight slot, or an internal hex, etc. to adapt to different assembly tools. The buckle can be an elastic buckle, a barb buckle, or other types of quick connectors, and the design thereof can include elastic arms, barb structures, etc. to achieve quick installation and reliable fixing.

[0078] Correspondingly, the screw hole can be a threaded hole for threadedly connecting with a screw or a light hole for self-tapping connection with a self-tapping screw. The clamping hole can be a hole with a clamping groove or an elastic clamping area for quick clamping connection with a buckle. The fastening hole 42 is matched in size and shape with the fastener 61 to ensure the firmness and reliability of the connection.

[0079] With reference to Figure 6 and Figure 7 In some examples, the insulation part 6 is provided with a widened structure 63 abutting against the second side wall 4 on one side close to the second side wall 4.

[0080] By providing the widened structure 63 and closely abutting it against the second side wall 4 on one side close to the second side wall 4, the contact area between the insulation part 6 and the second side wall 4 is increased, and the insulation performance and mechanical stability between the insulation part 6 and the second side wall 4 are enhanced. At the same time, this design can increase the creepage distance between adjacent two phases, which is conducive to reducing the risk of phase-to-phase short circuit.

[0081] The widened structure 63 is provided on one side of the insulation part 6 close to the second side wall 4, and the widened structure 63 is the same as the aforementioned screw mounting plate 62 and is symmetrically arranged on both sides of the insulation part 6. In this way, the contact area between the two sides of the insulation part 6 and the second side wall 4 can be increased, thereby improving the assembly stability.

[0082] With reference to Figure 6 and Figure 7 In some examples, the arc separation part 5 and / or the insulation part 6 is provided with a rib plate 631.

[0083] Providing the rib plate 631 on the arc separation part 5 can effectively enhance the structural strength of the arc separation part 5, reduce the risk of bending or swinging of the arc separation part 5 due to excessive area and small thickness, and be conducive to reducing the risk of phase-to-phase short circuit. Similarly, providing the rib plate 631 on the insulation part 6 has the same technical effect, which will not be described here.

[0084] With reference to Figure 6 The rib plate 631 on the insulation part 6 extends away from the second side wall 4 based on the widened structure 63 along the insulation part 6, which can improve the structural strength of the insulation part 6 and avoid easy bending or swinging of the insulation part 6, thereby improving the assembly stability of the phase-to-phase spacer plate 200 on the circuit breaker 100. The rib plate on the arc separation part 5 can be provided on the opposite two sides of the arc separation part in a transverse, longitudinal or oblique direction to enhance the structural strength of the arc separation part 5.

[0085] With reference to Figures 4 to 7 In some examples, the insulation part 6 is further provided with an extension part 64, and the second side wall 4 is provided with a receiving groove 43, and the extension part 64 is inserted into the receiving groove 43 correspondingly.

[0086] By setting the extension 64 and inserting it into the accommodating groove 43 on the second side wall 4, not only the connection stability and insulation performance between the insulation part 6 and the second side wall 4 are enhanced, but also the assembly process is significantly simplified and the assembly accuracy is improved. At the same time, this design can effectively adapt to the electrical and mechanical requirements under high-voltage and large-current working conditions, further improving the overall performance and reliability of the circuit breaker 100.

[0087] The extension 64 is arranged on the side of the insulation part 6 close to the second side wall 4, based on the extension of the insulation part 6 to the second side wall 4, the extension 64 is inserted into the accommodating groove 43 of the second side wall 4, which can increase the creepage distance and further improve the insulation performance between the adjacent two phases. At the same time, the insertion of the extension 64 into the accommodating groove 43 can further enhance the assembly stability of the insulation part 6 on the second side wall 4, thereby facilitating the improvement of the overall assembly stability of the inter-phase spacer plate 200 on the circuit breaker 100.

[0088] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An interphase barrier for a circuit breaker, characterized in that The circuit breaker comprises a first side wall provided with exhaust channels and a second side wall provided with busbars; The phase spacing plate comprises an arc spacing part and an insulation part which are integrally formed; The arc spacing part is connected with the first side wall through a first connecting structure for separating the exhaust channels on the first side wall, and the insulation part is connected with the second side wall through a second connecting structure for separating the busbars on the second side wall.

2. The phase-to-phase spacer of a circuit breaker according to claim 1, characterized in that The first connecting structure comprises a clamping boss provided on the arc spacing part and a clamping groove provided on the first side wall, and the clamping boss and the clamping groove are correspondingly clamped.

3. The phase-to-phase spacer of a circuit breaker according to claim 2, characterized in that An avoiding hole is provided on the second side wall, the avoiding hole is in communication with the clamping groove, and the clamping boss can be inserted into the clamping groove from the avoiding hole.

4. The phase-to-phase spacer plate of claim 3, wherein, An end portion of the clamping boss away from the insulation part is provided with a first chamfer, and / or a hole wall of the avoiding hole is provided with a second chamfer, when the end portion of the clamping boss away from the insulation part is provided with the first chamfer and the hole wall of the avoiding hole is provided with the second chamfer, the first chamfer and the second chamfer are matched.

5. The phase-to-phase spacer plate of claim 2, wherein, A cross section of the combination of the clamping boss and the arc spacing part is configured as T-shaped, and a cross section shape of the clamping groove corresponds to the cross section shape of the combination of the clamping boss and the arc spacing part.

6. The phase barrier of a circuit breaker according to any one of claims 1-5, characterized in that The second connecting structure comprises a fastener provided on the insulation part and a fastening hole provided on the second side wall, and the fastener and the fastening hole are correspondingly connected.

7. The phase-to-phase spacer plate of claim 6, wherein, The fastener is configured as a screw, and the fastening hole is configured as a screw hole. Or, the fastener is configured as a buckle, and the fastening hole is configured as a clamping hole.

8. The phase barrier of any one of claims 1-5, wherein, The insulation part is provided with a widening structure, and one side of the widening structure close to the second side wall abuts against the second side wall.

9. The phase-to-phase spacer plate of claim 8, wherein, The insulation part is further provided with an extension part, and the second side wall is provided with a receiving groove, and the extension part is correspondingly inserted into the receiving groove.

10. The phase-to-phase spacer plate of claim 8, wherein, The arc spacing part and / or the insulation part are provided with a rib plate.

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