CN118116783B - Arc extinction structure of alternating current/direct current dual-purpose circuit breaker - Google Patents
Arc extinction structure of alternating current/direct current dual-purpose circuit breaker Download PDFInfo
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- CN118116783B CN118116783B CN202410533471.2A CN202410533471A CN118116783B CN 118116783 B CN118116783 B CN 118116783B CN 202410533471 A CN202410533471 A CN 202410533471A CN 118116783 B CN118116783 B CN 118116783B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an arc extinguishing structure of an alternating current/direct current dual-purpose circuit breaker, which comprises a cover plate structure arranged in a plurality of wiring ports at one end of a circuit breaker body, wherein the wiring ports are insulated and separated by the cover plate structure to form an upper arc extinguishing chamber and a lower arc extinguishing chamber which are distributed up and down, the cover plate structure comprises an arc separation baffle which is extended and inserted into the lower wiring chamber and is used for insulating and separating the lower wiring chamber from the arc extinguishing chamber.
Description
Technical Field
The invention relates to the technical field of photovoltaic power supply direct current systems, in particular to an arc extinction structure of an alternating current/direct current dual-purpose circuit breaker.
Background
Along with the development of human society, energy and environment become urgent problems to be solved by the survival and development of human beings at present, low-carbon economy has become a trend of global economy development, solar power generation is clean, a mounting area is wide, the realization of low-price surfing is hopeful, and the low-carbon economy becomes a new energy with the prospect, along with the continuous expansion of the solar photovoltaic power generation industry scale, the demand of direct current plastic-case circuit breakers in photovoltaic and wind power is larger and larger, the direct current side voltage of a system is continuously increased, and the performance requirement on the plastic-case circuit breakers is higher and higher.
In a molded case circuit breaker, an arc extinguishing chamber is usually arranged in the molded case circuit breaker to extinguish an arc generated by a moving contact and a fixed contact in electrical equipment, so that the operation safety of the electrical equipment is ensured, and particularly, the DC molded case circuit breaker is difficult to break a DC short-circuit current. Because the breaking current is larger, a small amount of free gas of charged ions or residual electric arc is sprayed out of the shell of the circuit breaker from the rear of the arc extinguishing chamber, and meanwhile, the metal particles can be carried to directly spray outwards to spray out, so that a terminal baffle of the circuit breaker can be broken down, and peripheral lines can be short-circuited or burnt out when flying out of the circuit breaker. The existing practice is that the terminal cover that is used for the arc extinction and blocks metal particle is installed at the circuit breaker wiring end, and the terminal cover passes through screw fixed connection in circuit breaker one end department, and it includes a plurality of arc extinction chambeies that are linked together with a plurality of wiring ports of circuit breaker to and set up a plurality of arc extinction pieces in a plurality of arc extinction chambeies respectively, and a plurality of arc extinction pieces are vertical form, parallel interval arrangement in the arc extinction intracavity, make arc and free gas outwards discharge from the exhaust hole after the arc extinction of a plurality of arc extinction pieces. As can be seen from the above structure, the following problems still exist in the conventional circuit breaker adopting the arc extinguishing mode of the terminal cover: 1. the terminal cover is specially arranged at one end of the circuit breaker, the installation structure is complex, the occupied space is large, the whole product volume can be increased, the miniaturization of the product is not facilitated, and the production cost is high; 2. when free gas flows in the terminal cover, due to the blocking effect of the multi-layer arc suppression sheets, part of free gas flows towards the bottom of the terminal cover, and therefore ablation damage is caused to the wiring terminal at one end of the circuit breaker.
Disclosure of Invention
Therefore, the technical problem solved by the invention is to overcome the problems that in the prior art, a circuit breaker needs to be specially externally provided with a terminal cover, the installation structure is complex, the occupied space is large, the miniaturization of products is not facilitated, and free gas flows towards the bottom direction of the terminal cover to cause ablation damage to the wiring terminals, so that the arc extinguishing structure of the AC/DC dual-purpose circuit breaker, which has the function of eliminating free gas, does not cause ablation damage to the wiring terminals, achieves the zero arcing effect and is beneficial to the miniaturization of products, is provided.
In order to solve the technical problems, the invention provides an arc extinguishing structure of an alternating current-direct current dual-purpose circuit breaker, which comprises a circuit breaker body and a plurality of wiring ports arranged at one end of the circuit breaker body, wherein the wiring ports are arranged in front of and behind the arc extinguishing chamber in the circuit breaker body, a cover plate structure connected in the wiring ports is arranged on the circuit breaker body, the wiring ports are insulated and separated by the cover plate structure to form an upper arc extinguishing chamber and a lower wiring chamber which are distributed up and down, the cover plate structure comprises an arc isolation baffle plate which extends and is inserted into the lower wiring chamber and is used for insulating and separating the lower wiring chamber from the arc extinguishing chamber, an arc extinguishing net assembly is arranged in the upper arc extinguishing chamber, and free gas exhausted by the arc extinguishing chamber and arc are exhausted from the upper arc extinguishing chamber after arc extinguishing and filtering of the arc extinguishing net assembly.
In the arc extinguishing structure of the circuit breaker, the cover plate structure comprises a guide post which vertically extends and is accommodated in the upper arc extinguishing chamber, the outer wall of the guide post is of an arc structure, and two guide grooves are formed between the guide post and the side walls of the two sides of the upper arc extinguishing chamber.
In the arc suppression structure of the circuit breaker, the arc suppression net assembly comprises a first metal sintering net which is arranged at the indoor port of the upper arc suppression chamber in a flat plate shape, a third metal sintering net which is bent and bypasses the diversion columns to be connected in two diversion channels in an extending mode, and a second metal sintering net which is arranged at the outdoor port of the upper arc suppression chamber in a flat plate shape, wherein the third metal sintering net is in a V shape or an arc shape and is located between the first metal sintering net and the second metal sintering net.
In the arc extinguishing structure of the circuit breaker, the side walls of the two sides of the upper arc extinguishing chamber are oppositely provided with a first slot structure, a second slot structure and a third slot structure for respectively installing a first metal sintering net, a second metal sintering net and a third metal sintering net, and the third slot structure is provided with two hook-shaped groove parts oppositely arranged on the side walls of the two sides of the upper arc extinguishing chamber, so that the side edges of the two sides of the third metal sintering net are installed and blocked in the two hook-shaped groove parts.
In the arc extinction structure of the circuit breaker, the circuit breaker body comprises a base and an upper cover which are connected to form a plurality of wiring ports, the cover plate structure is positioned and installed between the base and the upper cover, the cover plate structure is connected with the base to form the lower wiring chamber, and the cover plate structure is connected with the upper cover to form the upper arc extinction chamber.
In the arc extinguishing structure of the circuit breaker, the top end of the flow guide column extends to be abutted to the lower end of the operation hole of the upper cover, and a through hole structure which is connected with the operation hole and the lower wiring chamber is arranged between the flow guide column and the cover plate structure in a penetrating mode.
In the arc extinguishing structure of the circuit breaker, the cover plate structure comprises a slope runway which is obliquely upwards arranged at the outer port of the upper arc extinguishing chamber in an extending mode.
In the arc extinction structure of the circuit breaker, the cover plate structure comprises a cover plate main body extending along the width direction of the circuit breaker body, a plurality of flow guide columns vertically formed on the upper surface of the cover plate main body, and a plurality of arc isolation blocking pieces integrally formed on one side edge of the cover plate main body, wherein the arc isolation blocking pieces are connected with the cover plate main body to form an L-shaped structure, and at least one reinforcing convex rib connected with the cover plate main body is arranged on the outer wall of the flow guide column.
In the above-mentioned circuit breaker arc extinction structure, the apron structure with keep fixedly linking to each other through mounting structure between base and the upper cover, mounting structure includes:
The positioning assembly comprises two positioning bosses arranged at two ends of the cover plate main body, two positioning grooves which are arranged at the bottoms of the side walls at two sides of the upper cover and are connected with the two positioning bosses in a matched manner, and two positioning clamping grooves which are arranged at the tops of the side walls at two sides of the base, wherein two positioning clamping blocks which are inserted into the two positioning clamping grooves are arranged at one side of the positioning bosses, which is opposite to the positioning grooves;
The fixing assembly comprises at least one group of fixing holes which sequentially penetrate through the upper cover, the cover plate structure and the base, and a fastener which is fixedly connected in the fixing holes, and the fastener applies fastening force which is used for oppositely pressing the cover plate structure to the upper cover and the base after fixing.
In the arc suppression structure of the circuit breaker, the upper cover comprises a plurality of upper cover inter-phase plates which are formed between a plurality of wiring ports at intervals, a first sealing structure is arranged between the cover plate structure and the plurality of upper cover inter-phase plates, the first sealing structure comprises a plurality of first isolation grooves which are respectively arranged at the bottoms of the upper cover inter-phase plates, and a plurality of first isolation protrusions which are correspondingly arranged on the upper surface of the cover plate main body and are embedded into the first isolation grooves in a matching mode, and the first isolation protrusions extend to two side edges of the cover plate main body.
In the arc suppression structure of the circuit breaker, the base comprises a plurality of base interphase plates which are formed between a plurality of wiring ports at intervals, a plurality of groups of second sealing structures are tightly arranged between the cover plate structure and the plurality of base interphase plates, each second sealing structure comprises a plurality of second isolation protrusions which are respectively arranged at the tops of the base interphase plates, and a plurality of second isolation grooves which are correspondingly arranged on the lower surface of the cover plate main body and are suitable for the matching insertion of the second isolation protrusions, and the second isolation grooves extend towards two side edges of the cover plate main body.
In the arc extinguishing structure of the circuit breaker, the cover plate structure is formed by an integrated structure of an insulating high-temperature-resistant material, and the insulating high-temperature-resistant material comprises any one or a combination of more of flame-retardant plastic ABS, flame-retardant plastic PP, flame-retardant plastic PC, flame-retardant nylon and ceramic.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. In the arc extinguishing structure of the AC/DC circuit breaker, the cover plate structure for separating the wiring ports to form the upper arc extinguishing chamber and the lower wiring chamber is arranged on the circuit breaker body, the cover plate structure is provided with the arc isolating baffle for insulating and separating the lower wiring chamber from the arc extinguishing chamber, and the arc extinguishing net component is arranged in the upper arc extinguishing chamber, so that the design has the advantages that on one hand, the arc extinguishing net component is built in one end of the circuit breaker body, the space layout of the circuit breaker is reasonably and optimally utilized, the traditional arc extinguishing mode of installing a terminal cover at one end of the circuit breaker is not adopted, the product volume is not increased, the miniaturization development of the circuit breaker is facilitated, and the production cost is reduced; on the other hand, the lower wiring chamber is mutually isolated from the arc extinguishing chamber and the upper arc extinguishing chamber respectively, free gas and residual arc exhausted from the arc extinguishing chamber can be exhausted outwards only through the upper arc extinguishing chamber, corrosion damage is caused to the terminals and the busbar in the lower wiring chamber, the free gas can be adsorbed and eliminated through the arc extinguishing net assembly, metal particles can be separated from being sprayed outwards, the effect of eliminating the free gas is achieved, the aim of secondary arc extinguishing is finally achieved, the zero arcing effect is achieved, the cleanness of exhaust gas can be ensured, the environment is protected, the arc extinguishing capability and the service life of the arc extinguishing chamber of the circuit breaker are improved, and the circuit breaker is safe and reliable to use.
2. In the arc extinguishing structure of the AC/DC circuit breaker, the cover plate structure comprises the guide post vertically extending and accommodated in the upper arc extinguishing chamber, and two guide channels are formed between the guide post and the side walls of the two sides of the upper arc extinguishing chamber.
3. In the arc extinguishing structure of the AC/DC circuit breaker, the first metal sintering net is arranged at the indoor port of the upper arc extinguishing chamber, the second metal sintering net is arranged at the outdoor port of the upper arc extinguishing chamber, and the third metal sintering net is arranged in the two diversion channels, so that free metal ions are more easily adsorbed by the multiple groups of metal sintering nets, arc extinguishing and free gas neutralization are performed again, multiple free gas elimination treatment effects can be achieved on the free gas and the electric arc, the effects of absorbing and eliminating the free gas are achieved, the activity is reduced, the electric arc is prevented from spreading out of the circuit breaker, and the arcing phenomenon is avoided. The metal sintering net is made of multi-layer metal woven wire mesh through special lamination pressing, vacuum sintering and other processes, meshes of the wire mesh layers are mutually staggered to form a balanced filtering structure, and the metal sintering net is a novel filtering material with high mechanical strength and an integral rigid structure, and is beneficial to improving the arc extinguishing performance of the circuit breaker.
4. In the arc extinguishing structure of the AC/DC circuit breaker, the cover plate structure is positioned and installed between the base and the upper cover, and the plurality of wiring ports are respectively separated to form the upper arc extinguishing chamber and the lower wiring chamber, so that the sealing insulation isolation between the upper arc extinguishing chamber and the lower wiring chamber is realized, and the lower wiring chamber and the arc extinguishing chamber are insulated from each other front and back by the arc separation baffle plate, so that free gas and electric arc are prevented from flowing into the lower wiring chamber, and the use safety of wiring terminals in the lower wiring chamber is ensured; according to the technical scheme, the flow guide column on the cover plate structure is extended to be abutted to the lower end of the operation hole of the upper cover, so that the flow guide column is in sealing fit with the lower end of the operation hole, through the through hole structure which is connected with the operation hole and the lower wiring chamber and is arranged between the flow guide column and the cover plate structure, the sealing insulation isolation between the upper arc extinguishing chamber and the operation hole is realized, free gas and electric arc in the upper arc extinguishing chamber are prevented from flowing out from the position of the operation hole, meanwhile, the requirement of a user for wiring operation on the wiring terminal in the lower wiring chamber from the position of the operation hole by means of a tool is met, and the insulation protection performance of a product is improved.
5. In the arc-extinguishing structure of the AC/DC circuit breaker, the cover plate structure is provided with the slope runway at the outer port of the upper arc-extinguishing chamber, and when arc-extinguishing gas subjected to arc-extinguishing treatment is sprayed out of the upper arc-extinguishing chamber, the slope runway is designed to facilitate the arc-extinguishing gas to be sprayed out in an inclined upward direction so as to change the movement direction of the gas during the gas spraying, thereby effectively avoiding the arc-extinguishing gas from damaging the wiring busbar below and being safe and reliable to use.
6. In the arc extinguishing structure of the AC/DC circuit breaker, when the cover plate structure is installed, the cover plate structure and the base are in positioning connection through the matching of the positioning boss and the positioning groove, and the cover plate structure and the upper cover are in positioning connection through the matching of the positioning fixture block and the positioning fixture block, so that the accurate installation position of the cover plate structure between the base and the upper cover is ensured, the situation of deviation of the installation position is avoided, and finally the upper cover, the cover plate structure and the base are fixedly connected together through the fastener, so that the upper cover and the base are oppositely pressed against the cover plate structure under the fastening force exerted by the fastener, and the stability and the reliability of the installation of the cover plate structure are ensured.
7. In the arc extinguishing structure of the AC/DC circuit breaker, when the cover plate structure is installed between the base and the upper cover, the plurality of first isolation protrusions on the cover plate main body are embedded in the first isolation grooves at the bottoms of the plurality of upper cover phase plates in a matching way, so that the plurality of upper arc extinguishing chambers between the upper cover and the cover plate structure are isolated in an insulating way, the plurality of upper arc extinguishing chambers are ensured to have safe electric distances, and meanwhile, the plurality of second isolation protrusions on the cover plate main body are embedded in the second isolation grooves at the tops of the plurality of base phase plates in a matching way, so that the plurality of lower wiring chambers between the base and the cover plate structure are isolated in an insulating way, the safety electric distance between the plurality of upper arc extinguishing chambers is ensured, and the installation design realizes the sealed insulation isolation between the circuit breaker and the phase plates, avoids the phenomena of creepage and arc channeling and improves the electric insulation performance of products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of a three-dimensional structure of an arc extinction structure of an ac/dc circuit breaker provided by the invention;
Fig. 2 is a schematic plan view of a circuit breaker body according to the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the structure of FIG. 2 along line B-B;
FIG. 5 is a schematic view of a partially enlarged structure of the position C shown in FIG. 4;
FIG. 6 is a schematic view of the cover plate structure and the upper cover mounting structure of the present invention;
FIG. 7 is a schematic diagram of a cover structure and a base mounting structure according to the present invention;
FIG. 8 is a schematic view of the installation structure of the arc suppression network assembly of the present invention;
FIG. 9 is a schematic view of a partial structure of a base of the present invention;
Fig. 10 is a schematic perspective view of a cover structure of the present invention.
Reference numerals illustrate: 1. a circuit breaker body; 10. an arc extinguishing chamber; 11. a base; 12. an upper cover; 13. an operation hole; 14. a positioning groove; 15. positioning clamping grooves; 16. an upper cover alternate plate; 17. a base interphase plate; 2. a cover plate structure; 21. a cover plate main body; 22. slope runway; 23. reinforcing the convex ribs; 24. positioning the boss; 25. positioning a clamping block; 3. arc-isolating baffle plates; 4. a flow guiding column; 41. a via structure; 5. an upper arc extinguishing chamber; 51. a first slot structure; 52. a second slot structure; 53. a third slot structure; 6. a lower junction chamber; 7. an arc suppression net assembly; 71. a first metal sintering net; 72. a second metal sintering net; 73. a third metal sintering net; 8. a fastener; 81. a fixing hole; 91. a first isolation protrusion; 92. a first isolation groove; 93. a second isolation protrusion; 94. and a second isolation groove.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
The present embodiment is specifically described below with reference to the accompanying drawings:
The present embodiment provides an arc extinguishing structure of an ac/dc circuit breaker as shown in fig. 1-10, comprising a circuit breaker body 1 and a plurality of connection ports arranged at one end of the circuit breaker body 1, wherein the connection ports are used for load connection, the connection ports are arranged opposite to an arc extinguishing chamber 10 in the circuit breaker body 1 (the connection ports are denoted by a in fig. 1), a cover plate structure 2 connected in the connection ports is arranged on the circuit breaker body 1, the connection ports are insulated and separated by the cover plate structure 2 to form an upper arc extinguishing chamber 5 and a lower connection chamber 6 which are distributed up and down, the cover plate structure 2 comprises an arc separation baffle 3 which extends into the lower connection chamber 6 and is used for insulating and separating the lower connection chamber 6 from the arc extinguishing chamber 10, an arc extinguishing net assembly 7 is arranged in the upper arc extinguishing chamber 5, and free gas discharged from the arc extinguishing chamber 10 and filtered by the arc extinguishing net assembly 7 are discharged from the upper arc extinguishing chamber 5 to the outside.
In the above embodiment, the upper arc extinguishing chamber 5 and the lower arc extinguishing chamber 6 are formed by separating the wiring ports through the cover plate structure 2, and the arc insulating baffle 3 for insulating and separating the lower arc extinguishing chamber 6 from the arc extinguishing chamber 10 is arranged, so that the design has the advantages that on one hand, the arc extinguishing net assembly 7 is built in the upper arc extinguishing chamber 5 at one end of the circuit breaker body, the space layout of the circuit breaker is reasonably and optimally utilized, the traditional arc extinguishing mode of installing a terminal cover at one end of the circuit breaker is not adopted, the product volume is not increased, the miniaturization development of the circuit breaker is facilitated, and the production cost is reduced; on the other hand, the lower wiring chamber 6 is mutually isolated from the arc extinguish chamber 10 and the upper arc extinguish chamber 5 respectively, free gas exhausted from the arc extinguish chamber 10 can only be exhausted outwards through the upper arc extinguish chamber 5, corrosion damage to terminals and busbar in the lower wiring chamber 6 can not be caused, the ion in the free gas can be adsorbed and eliminated through the arc extinguishing net assembly 7, metal particles can be separated from being sprayed outwards to play a role of eliminating the free, secondary short-circuit accidents caused by the external busbar of the circuit breaker are avoided, the aim of secondary arc extinction is finally achieved, zero arcing effect is achieved, the cleanness of exhaust gas can be guaranteed, environmental protection is achieved, environmental pollution is reduced, the arc extinguishing capacity and service life of the arc extinguish chamber of the circuit breaker are improved, and the circuit breaker is safe and reliable to use.
The following details the specific arrangement of the cover plate structure with reference to fig. 4 to 10:
The cover plate structure 2 comprises a guide post 4 vertically extending and accommodated in the upper arc extinguishing chamber, the outer wall of the guide post 4 is of an arc structure, two guide grooves are formed between the guide post 4 and the side walls of the two sides of the upper arc extinguishing chamber, the structure is arranged, free gas discharged from the arc extinguishing chamber is discharged from the two guide grooves after being split through the guide post 4, meanwhile, some flashover can be lengthened or blocked and then flows into the two guide grooves, the arc energy is reduced, the phenomenon that the arc reignition is caused due to the accumulation of free gas and the energy of the flashover is avoided, the guide post 4 is designed to further reduce the impact force of the air flow, ensure the smoothness of the air flow by utilizing the two guide grooves, and accelerate the heat dissipation by being communicated with the outside, and cooperate with the arc extinguishing net assembly 7 to realize the effect of eliminating the free gas and playing the role of the free arc of the upper arc extinguishing chamber 5, so that the product is safe in use.
In this embodiment, the breaker body 1 includes a base 11 and an upper cover 12 connected to form a plurality of connection ports, the cover structure 2 is positioned and installed between the base 11 and the upper cover 12, the cover structure 2 is connected to the base 11 to form a plurality of the lower connection chambers 6, and the cover structure 2 is connected to the upper cover 12 to form a plurality of the upper arc extinguishing chambers 5. As can be seen from the above structure, the cover plate structure 2 is positioned and installed between the base 11 and the upper cover 12, and the plurality of wiring ports are respectively separated to form the upper arc extinguishing chamber 5 and the lower wiring chamber 6, so that the sealing insulation isolation between the upper arc extinguishing chamber 5 and the lower wiring chamber 6 is realized, and the arc isolating baffle 3 is added to isolate the lower wiring chamber 6 from the arc extinguishing chamber 10 in a front-rear insulation manner, so that free gas and electric arc are prevented from flowing into the lower wiring chamber 6, and the use safety of the wiring terminals in the lower wiring chamber 6 is ensured. And referring to fig. 3, according to the fact that the guide post 4 on the cover plate structure 2 extends to be abutted against the lower end of the operation hole 13 of the upper cover 12, the guide post 4 and the lower end of the operation hole 13 form sealing fit, through the through hole structure 41 which passes through the operation hole 13 and the lower wiring chamber 6 is penetrated and arranged between the guide post 4 and the cover plate structure 2, the sealing insulation isolation between the upper arc extinguishing chamber 5 and the operation hole 13 is realized by the design, free gas and electric arc in the upper arc extinguishing chamber 5 are prevented from escaping from the position of the operation hole 13, meanwhile, the requirement of a user for wiring operation on the wiring terminal in the lower wiring chamber from the position of the operation hole by means of a tool is met, and insulating protection performance of a product is improved.
As a specific structural arrangement, the cover plate structure 2 is formed by integrally forming an insulating high-temperature-resistant material, wherein the insulating high-temperature-resistant material comprises any one or a combination of more of flame-retardant plastics ABS, flame-retardant plastics PP, flame-retardant plastics PC, flame-retardant nylon and ceramics, and an insulating support bottom plate made of the insulating high-temperature-resistant material has the characteristics of good heat resistance, good dimensional stability, high mechanical strength, excellent impact strength and the like. As shown in fig. 3-5 and 10, the cover structure 2 comprises a cover main body 21 extending along the width direction of the circuit breaker body, a plurality of diversion columns 4 vertically formed on the upper surface of the cover main body 21, and a plurality of arc-isolating baffle plates 3 integrally formed on one side edge of the cover main body 21, wherein the arc-isolating baffle plates 3 are connected with the cover main body 21 to form an L-shaped structure, the arc-isolating baffle plates 3 are correspondingly inserted at the inner ports of the plurality of lower wiring chambers 6, slot structures suitable for inserting the arc-isolating baffle plates are correspondingly arranged on the side walls of the two sides of the inner ports of the lower wiring chambers, so that the lower wiring chambers 6 are insulated from the arc-extinguishing chambers 10, the diversion columns 4 are respectively accommodated in the plurality of upper arc-extinguishing chambers 5 and correspondingly abutted at the lower ends of the plurality of operation holes 13, annular grooves tightly matched with the top ends of the diversion columns 4 are arranged at the lower ends of the operation holes 13, because the inside of the flow guide column is of a hollow structure design, through arranging two reinforcing convex ribs 23 connected with the cover plate main body 21 on the outer wall of the flow guide column 4, the two reinforcing convex ribs 23 respectively face the front end and the rear end of the upper arc extinguishing chamber 5, the structural strength between the flow guide column 4 and the cover plate structure 2 can be enhanced through the reinforcing convex ribs 23, the condition of bending deformation caused by stress is avoided, the cover plate structure 2 can drive a plurality of arc separation baffle plates 3 and a plurality of flow guide columns 4 to realize synchronous installation, the installation is convenient and quick, therefore, the cover plate structure 2 is reasonably arranged between a base and an upper cover, a plurality of independent cavity spaces are formed by insulating and separating multiphase wiring ports of the circuit breaker through the cover plate structure 2, the sealed insulation isolation between the upper arc extinguishing chamber 5 and the lower wiring chamber 6 in each phase can be synchronously realized, and realize the insulating sealed isolation between upper arc suppression room 5 and the operation hole 13, and realize the purpose of sealed insulating isolation between lower wiring room 6 and explosion room 10, guarantee that the arc gas only discharges after the dissociation processing of upper arc suppression room, and can not flow into in operation hole and the lower wiring room causes harm influence, this kind of apron structure's simple structure, installation convenient to use can play the effect of installation isolation arc and electrical insulation.
As shown in fig. 10, the cover plate structure 2 includes a slope runway 22 extending obliquely upward and disposed at the outer port of the upper arc extinguishing chamber 5, so that the design has the advantages that when arc extinguishing gas after arc extinguishing treatment is sprayed out of the upper arc extinguishing chamber, the slope runway 22 is designed to help the arc extinguishing gas to be sprayed out in an obliquely upward direction, so as to change the moving direction of the gas during spraying, effectively avoid damage of the arc extinguishing gas to the wiring busbar below, and is safe and reliable to use.
The following details are provided for the specific arrangement of the arc-extinguishing net assembly in conjunction with fig. 1-3 and 8:
The arc suppression net assembly 7 comprises a first metal sintering net 71 which is arranged at the inner port of the upper arc suppression chamber 5 in a flat plate shape, a third metal sintering net 73 which is bent and bypasses the guide post 4 and is connected in two guide channels in an extending manner, and a second metal sintering net 72 which is arranged at the outer port of the upper arc suppression chamber 5 in a flat plate shape, wherein the third metal sintering net is arranged between the first metal sintering net and the second metal sintering net, and the third metal sintering net is designed in a V shape or an arc shape, so that the contact area of the third metal sintering net with free gas and electric arc in the upper arc suppression chamber can be increased, the effects of cutting arc suppression and filtering arc suppression are achieved well, and the free gas and the electric arc can be split into two guide channels in a one-to-two manner by matching with the guide post, so that the guide flow splitting effect is achieved. Further preferably, the side walls of the two sides of the upper arc extinguishing chamber 5 are oppositely provided with a first slot structure 51, a second slot structure 52 and a third slot structure 53 for respectively installing a first metal sintering net 71, a second metal sintering net 72 and a third metal sintering net 73, the first slot structure 51 and the second slot structure 52 are respectively vertical slots, the third slot structure 53 is provided with two hook-shaped slot parts oppositely arranged on the side walls of the two sides of the upper arc extinguishing chamber, so that the side edges of the two sides of the third metal sintering net 73 are installed and blocked in the two hook-shaped slot parts; the first slot structure 51, the second slot structure 52 and the third slot structure 53 respectively play a role in limiting and installing the first metal sintering net 71, the second metal sintering net 72 and the third metal sintering net 73 in the upper arc extinguishing chamber 5, so that the metal sintering nets in each group can be prevented from loosening due to impact in the upper arc extinguishing chamber 5, and the installation stability is good. According to the structure, free metal ions are easier to adsorb through the plurality of groups of metal sintering nets, arc extinction and free gas neutralization are carried out again, and multiple free gas elimination treatment effects can be achieved on free gas and electric arcs, so that the effect of absorbing and eliminating free electrons in the gas is achieved, the activity is reduced, the electric arcs are prevented from spreading out of the circuit breaker, and the arcing phenomenon is avoided. The metal sintering net adopted in the embodiment is manufactured by adopting a plurality of layers of metal braiding silk net through special lamination pressing, vacuum sintering and other processes, the metal braiding silk net can be preferably made of 316 stainless steel, meshes of all layers of silk net are mutually staggered to form a balanced filtering structure, the metal braiding silk net has higher mechanical strength and an integral rigid structure, the defects of low strength, poor rigidity and unstable mesh shape of the common metal silk net are overcome, and the pore size, permeability and strength characteristics of the material can be reasonably matched and designed, so that the metal braiding silk net has excellent filtering precision, filtering impedance, mechanical strength, wear resistance, heat resistance and machinability.
The following describes in detail the mounting of the cover structure between the base and the upper cover with reference to fig. 6 to 10:
the cover plate structure 2 is fixedly connected with the base 11 and the upper cover 12 through a mounting structure, the mounting structure comprises a positioning assembly for positioning and connecting the cover plate structure 2 with the upper cover 12 and the base 11, and a fixing assembly for fixedly connecting the positioned cover plate structure 2, the upper cover 12 and the base 11, further preferably, the positioning assembly comprises two positioning bosses 24 arranged at two ends of the cover plate main body 21, and two positioning grooves 14 arranged at the bottoms of two side walls of the upper cover 12 and in matched connection with the two positioning bosses, so that the positioning fit between the cover plate structure 2 and the upper cover 12 is realized, and the positioning assembly further comprises two positioning clamping grooves 15 arranged at the tops of the two side walls of the base 11, and two positioning clamping blocks 25 inserted into the two positioning clamping grooves 15 are arranged at one side, opposite to the positioning bosses 24, so that the positioning fit between the cover plate structure 2 and the base 11 is realized, and the upper cover 12 can be formed into a whole with the upper cover 12 in advance through the positioning assembly, and then the positioning fit between the upper cover and the base 11 is realized; wherein, the fixed subassembly includes penetrating in proper order and setting up in at least a set of fixed orifices 81 of upper cover 12, apron structure 2 and base 11, and fixed connection in fastener 8 in fixed orifices 81, and this fastener 8 is exerted the fastening force of compressing tightly in opposite directions to upper cover 12 and base 11 to apron structure 2 after fixing, and this fastener 8 can be the preferred screw structure. The mounting structure has the advantages that when the cover plate structure is mounted, the cover plate structure 2 is in positioning connection with the base 11 through the cooperation of the positioning boss 24 and the positioning groove 14, and the cover plate structure 2 is in positioning connection with the upper cover 12 through the cooperation of the positioning clamping block 25 and the positioning clamping groove 15, so that the mounting position of the cover plate structure 2 between the base 11 and the upper cover 12 is accurate, the situation that the mounting position is deviated is avoided, and finally the upper cover 12, the cover plate structure 2 and the base 11 are fixedly connected together through the fastening piece 8, so that the upper cover 12 and the base 11 are oppositely pressed against the cover plate structure 2 under the fastening force applied by the fastening piece 8, and the mounting stability and the mounting reliability of the cover plate structure are ensured.
As shown in fig. 6-7, the upper cover 12 includes a plurality of upper cover interphase plates 16 formed between a plurality of connection ports at intervals, the corresponding base 11 includes a plurality of base interphase plates 17 formed between a plurality of connection ports at intervals, when the base 11 and the upper cover 12 are assembled together, the plurality of base interphase plates 17 and the plurality of upper cover interphase plates 16 are correspondingly connected, wherein the fixing holes 81 are respectively formed through the corresponding base interphase plates 17 and the corresponding upper cover interphase plates 16, and in order to ensure tightness of mounting connection of the cover plate structure 2 with the base 11 and the upper cover 12 respectively, a first sealing structure is tightly arranged between the cover plate structure 2 and the plurality of upper cover interphase plates 16, the first sealing structure includes a plurality of first isolation grooves 92 respectively formed at bottoms of the plurality of upper cover interphase plates 16, and a plurality of first isolation protrusions 91 respectively formed on the upper surface of the cover plate body 21 and respectively embedded in the first isolation grooves 92 in a matching manner, and the first isolation protrusions 91 extend to two sides of the cover plate body 21; in addition, a second sealing structure is tightly arranged between the cover plate structure 2 and the base inter-phase plates 17, the second sealing structure comprises a plurality of second isolation protrusions 93 respectively arranged at the tops of the base inter-phase plates 17, and a plurality of second isolation grooves 94 correspondingly arranged on the lower surface of the cover plate main body 21 and suitable for matching and inserting the second isolation protrusions 93, and the second isolation grooves 94 extend towards two side edges of the cover plate main body 21. According to the structure, when the cover plate structure 2 is installed between the base 11 and the upper cover 12, the first isolation protrusions 91 on the cover plate main body are embedded in the first isolation grooves 92 at the bottoms of the upper cover interphase plates 16 in a matched mode, so that the upper arc suppression chambers 5 formed between the upper cover 12 and the cover plate structure 2 are isolated in an insulating mode, a safe electric distance between the upper arc suppression chambers is guaranteed, meanwhile, the second isolation protrusions 93 on the base interphase plates are embedded in the second isolation grooves 94 of the cover plate main body in a matched mode, the lower wiring chambers 6 formed between the base 11 and the cover plate structure 2 are isolated in an insulating mode, the safe electric distance between the upper arc suppression chambers 5 is guaranteed, and therefore the installation design achieves sealing insulation isolation between a breaker phase and a phase, the electric insulation isolation phenomenon is avoided, the electric insulation performance of a product is improved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
1. The utility model provides an arc extinction structure of dual-purpose circuit breaker of alternating current-direct current, includes circuit breaker body (1) and sets up in a plurality of wiring ports of circuit breaker body (1) one end, wiring port sets up its characterized in that with arc extinguishing chamber (10) in circuit breaker body (1) relatively around: the circuit breaker is characterized in that a cover plate structure (2) connected to a plurality of wiring ports is arranged on the circuit breaker body (1), the wiring ports are insulated and separated by the cover plate structure (2) to form an upper arc-extinguishing chamber (5) and a lower arc-extinguishing chamber (6) which are distributed up and down, the cover plate structure (2) comprises an arc-insulating baffle plate (3) which is inserted into the lower arc-extinguishing chamber (6) in an extending manner and is used for insulating and separating the lower arc-extinguishing chamber (6) from the arc-extinguishing chamber (10), an arc-extinguishing net assembly (7) is arranged in the upper arc-extinguishing chamber (5), and free gas and electric arc discharged from the arc-extinguishing chamber (10) are discharged to the outside from the upper arc-extinguishing chamber (5) after arc-extinguishing filtration of the arc-extinguishing net assembly (7); the cover plate structure (2) comprises a flow guide column (4) vertically extending and accommodated in the upper arc extinguishing chamber (5), the outer wall of the flow guide column (4) is of an arc structure, and two flow guide channels are formed between the flow guide column (4) and side walls of two sides of the upper arc extinguishing chamber (5); the circuit breaker body (1) comprises a base (11) and an upper cover (12) which are connected to form a plurality of wiring ports, the cover plate structure (2) is positioned and installed between the base and the upper cover, and the cover plate structure (2) comprises a cover plate main body (21) extending along the width direction of the circuit breaker body; the upper cover (12) comprises a plurality of upper cover inter-phase plates (16) which are formed between a plurality of wiring ports at intervals, a first sealing structure is arranged between the cover plate structure (2) and the plurality of upper cover inter-phase plates (16), the first sealing structure comprises a plurality of first isolation grooves (92) which are respectively arranged at the bottoms of the plurality of upper cover inter-phase plates (16), and a plurality of first isolation protrusions (91) which are correspondingly arranged on the upper surface of the cover plate main body (21) and are matched and embedded into the first isolation grooves (92), and the first isolation protrusions (91) extend to two side edges of the cover plate main body (21); the base (11) comprises a plurality of base interphase plates (17) which are formed among a plurality of wiring ports at intervals, a plurality of groups of second sealing structures are tightly arranged between the cover plate structure (2) and the plurality of base interphase plates (17), each second sealing structure comprises a plurality of second isolation protrusions (93) which are respectively arranged at the top of the corresponding base interphase plate (17), and a plurality of second isolation grooves (94) which are correspondingly arranged on the lower surface of the cover plate main body (21) and are suitable for the matching insertion of the second isolation protrusions (93), and the second isolation grooves (94) extend towards the side edges of the two sides of the cover plate main body (21); the cover plate structure (2) is fixedly connected with the base (11) and the upper cover (12) through a mounting structure, and the mounting structure comprises:
The positioning assembly comprises two positioning bosses (24) arranged at two ends of the cover plate main body (21), two positioning grooves (14) which are arranged at the bottoms of the side walls at two sides of the upper cover (12) and are connected with the two positioning bosses in a matched manner, two positioning clamping grooves (15) which are arranged at the tops of the side walls at two sides of the base (11), and two positioning clamping blocks (25) which are inserted into the two positioning clamping grooves (15) are arranged at one side, opposite to the positioning grooves (14), of the two positioning bosses (24);
The fixing assembly comprises at least one group of fixing holes (81) which sequentially penetrate through the upper cover (12), the cover plate structure (2) and the base (11), and a fastener (8) fixedly connected in the fixing holes (81), wherein the fastener (8) applies fastening force for oppositely pressing the cover plate structure (2) to the upper cover (12) and the base (11) after fixing.
2. The arc extinguishing structure of an ac/dc circuit breaker according to claim 1, wherein: the arc suppression net assembly (7) comprises a first metal sintering net (71) which is arranged at the inner end of the upper arc suppression chamber (5) in a flat plate shape, a third metal sintering net (73) which is bent and bypasses the guide posts (4) and is connected in two guide channels in an extending mode, and a second metal sintering net (72) which is arranged at the outer end of the upper arc suppression chamber (5) in a flat plate shape, wherein the third metal sintering net (73) is in a V-shaped or arc-shaped shape and is located between the first metal sintering net (71) and the second metal sintering net (72).
3. The arc extinguishing structure of an ac/dc circuit breaker according to claim 2, wherein: the arc extinguishing chamber is characterized in that a first slot structure (51), a second slot structure (52) and a third slot structure (53) for respectively installing a first metal sintering net (71), a second metal sintering net (72) and a third metal sintering net (73) are oppositely arranged on two side walls of the upper arc extinguishing chamber, and the third slot structure (53) is provided with two hook-shaped groove parts which are oppositely arranged on two side walls of the upper arc extinguishing chamber, so that two side edges of the third metal sintering net (73) are installed and blocked in the two hook-shaped groove parts.
4. An arc extinction structure of an ac/dc circuit breaker according to claim 2 or 3, characterized in that: the cover plate structure (2) is connected with the base (11) to form the lower wiring chamber (6), and the cover plate structure (2) is connected with the upper cover (12) to form the upper arc extinguishing chamber (5).
5. The arc extinguishing structure of an ac/dc circuit breaker according to claim 4, wherein: the top end of the flow guide column (4) extends to be abutted to the lower end of the operation hole (13) of the upper cover (12), and a through hole structure (41) connected with the operation hole (13) and the lower wiring chamber (6) is arranged between the flow guide column (4) and the cover plate structure (2) in a penetrating mode.
6. The arc extinguishing structure of an ac/dc circuit breaker according to claim 5, wherein: the cover plate structure (2) comprises a slope runway (22) which is obliquely upwards arranged at the outer port of the upper arc extinguishing chamber (5).
7. The arc extinguishing structure of an ac/dc circuit breaker according to claim 5 or 6, characterized in that: the cover plate structure (2) comprises a plurality of guide posts (4) which are vertically formed on the upper surface of the cover plate main body (21), and a plurality of arc isolation baffle plates (3) which are integrally formed on one side edge of the cover plate main body (21), wherein the arc isolation baffle plates (3) are connected with the cover plate main body (21) to form an L-shaped structure, and at least one reinforcing convex rib (23) connected with the cover plate main body (21) is arranged on the outer wall of the guide post (4).
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| CN202410533471.2A CN118116783B (en) | 2024-04-30 | 2024-04-30 | Arc extinction structure of alternating current/direct current dual-purpose circuit breaker |
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| CN202410533471.2A CN118116783B (en) | 2024-04-30 | 2024-04-30 | Arc extinction structure of alternating current/direct current dual-purpose circuit breaker |
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| CN117936334A (en) * | 2024-03-11 | 2024-04-26 | 上海正泰智能科技有限公司 | Free terminal cover disappears |
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| JP3216780B2 (en) * | 1994-07-14 | 2001-10-09 | 富士電機株式会社 | Circuit breaker |
| JP2002075160A (en) * | 2000-09-05 | 2002-03-15 | Nisshin Denko Co Ltd | Current-limiting circuit breaker |
| JP2018133142A (en) * | 2017-02-13 | 2018-08-23 | 株式会社日立産機システム | Circuit breaker |
| CN109300746A (en) * | 2018-10-30 | 2019-02-01 | 天津京人电器有限公司 | The terminal cover of breaker |
| CN110047717B (en) * | 2019-06-06 | 2024-07-19 | 常熟开关制造有限公司(原常熟开关厂） | Arc isolation cover of circuit breaker |
| CN209929246U (en) * | 2019-07-17 | 2020-01-10 | 常熟开关制造有限公司(原常熟开关厂） | Terminal cover of circuit breaker |
| CN213936056U (en) * | 2020-06-24 | 2021-08-10 | 德力西电气有限公司 | Conveniently-detachable zero-arcing accessory and circuit breaker thereof |
| CN213635878U (en) * | 2020-12-15 | 2021-07-06 | 常熟开关制造有限公司(原常熟开关厂） | Arc extinguishing device of molded case circuit breaker |
| CN214624930U (en) * | 2021-04-23 | 2021-11-05 | 常熟开关制造有限公司(原常熟开关厂） | Dissociating eliminating structure of circuit breaker |
| JP2023121615A (en) * | 2022-02-21 | 2023-08-31 | 富士電機株式会社 | circuit breaker |
| CN218385092U (en) * | 2022-08-16 | 2023-01-24 | 常熟开关制造有限公司(原常熟开关厂） | Circuit breaker |
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| CN117936334A (en) * | 2024-03-11 | 2024-04-26 | 上海正泰智能科技有限公司 | Free terminal cover disappears |
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