CN117334533A - Reinforced flashover eliminating device for circuit breaker - Google Patents
Reinforced flashover eliminating device for circuit breaker Download PDFInfo
- Publication number
- CN117334533A CN117334533A CN202311559217.1A CN202311559217A CN117334533A CN 117334533 A CN117334533 A CN 117334533A CN 202311559217 A CN202311559217 A CN 202311559217A CN 117334533 A CN117334533 A CN 117334533A
- Authority
- CN
- China
- Prior art keywords
- arc
- circuit breaker
- terminal cover
- mounting
- extinguishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 28
- 230000008033 biological extinction Effects 0.000 claims abstract description 22
- 238000003379 elimination reaction Methods 0.000 claims description 48
- 230000008030 elimination Effects 0.000 claims description 47
- 238000009434 installation Methods 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 26
- 230000001629 suppression Effects 0.000 claims description 15
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 14
- 239000003063 flame retardant Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 6
- 239000002990 reinforced plastic Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229920006305 unsaturated polyester Polymers 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 230000004888 barrier function Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 24
- 238000013461 design Methods 0.000 abstract description 7
- 238000010494 dissociation reaction Methods 0.000 abstract description 3
- 230000005593 dissociations Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 36
- 239000002923 metal particle Substances 0.000 description 10
- 230000016507 interphase Effects 0.000 description 7
- 238000004880 explosion Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 238000002679 ablation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- H01H71/08—Terminals; Connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
Landscapes
- Breakers (AREA)
Abstract
The invention discloses a reinforced flashover eliminating device of a circuit breaker, which comprises a terminal cover and an insulating supporting bottom plate arranged at the bottoms of the circuit breaker body and the terminal cover, wherein the insulating supporting bottom plate comprises a plurality of limiting grooves and a plurality of mounting columns arranged in the limiting grooves, a plurality of mounting guide holes sleeved on the mounting columns are arranged on a plurality of partition plates of the terminal cover, and the mounting guide holes are penetrated through by fixing pieces and fixedly connected with the mounting columns, so that the mounting design improves the mounting reliability between the insulating supporting bottom plate and the terminal cover, improves the compressive strength and the mechanical strength of the terminal cover under the condition of instantaneously breaking large current and atmospheric pressure, ensures the safe electric gap after the terminal cover is mounted, plays the roles of eliminating dissociation and secondary arc extinction by means of the terminal cover, avoids the electric arc from ablating a busbar of a main circuit or causing damage of a shell and a bracket and secondary short circuit, achieves zero flashover effect, and ensures the safety of equipment and the stability of electric performance.
Description
Technical Field
The invention relates to the technical field of piezoelectric devices, in particular to a reinforced flashover eliminating device for a circuit breaker.
Background
In the action process of breaking the plastic shell breaker with load or large fault current, the voltage between the moving contact and the static contact can cause air medium discharge to form an arc, but the arc cannot be completely and reliably extinguished only by virtue of an arc extinguishing chamber in the breaker, residual arc can be sprayed out to the wiring end of the breaker along an air passage, and meanwhile, a large amount of hot metal particles are carried, and the metal particles directly spray out along with the arc, so that a wiring end baffle of the breaker can be broken down, and peripheral lines can be short-circuited or burnt out when the metal particles fly out of the breaker. It is common practice to install a terminal cover at the terminal position of the circuit breaker for blocking metal particles and extinguishing arc gas.
The current circuit breaker as in the drawing/a take terminal cover, including circuit breaker body, bottom plate and terminal cover, this bottom plate is a thinner resin board of thickness and installs in circuit breaker body bottom, the terminal cover passes through screw fixed connection on the bottom plate, the terminal cover is including the baffle that separates its inner chamber into three arc extinction chamber, and set up a plurality of arc extinction pieces in three arc extinction intracavity respectively, a plurality of arc extinction pieces are vertical form, parallel interval arrangement in the arc extinction intracavity, the rear end of terminal cover is the open end towards the circuit breaker wiring end, and its front end is equipped with preceding baffle, and be equipped with a plurality of exhaust holes on preceding baffle, make arc 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, although the terminal cover is used to block arc gases and particles, the following problems still exist in practical use:
1. the installation support strength between the terminal cover and the bottom plate is poor, particularly when the breaker breaks a large fault current, a large amount of arc gas can be sprayed to one side of the terminal cover, the instantaneous air pressure is large, the terminal cover can be impacted to shake, an obvious gap is generated between the terminal cover and the bottom plate, the electric gap is too small, and even the bottom plate is cracked and lifted, so that the terminal cover is installed and damaged; 2. the arc gas is blocked by the plurality of layers of arc extinguishing plates, so that the fluxion is poor, and part of the arc gas moves towards the bottom of the terminal cover under the condition of being blocked, so that secondary ablation damage is caused to the busbar.
Disclosure of Invention
Therefore, the technical problem solved by the invention is to overcome the problems of the prior art that the mounting support strength between the terminal cover and the bottom plate is poor, the terminal cover is impacted by arc gas to shake and generate obvious clearance with the bottom plate, the electric clearance is too small, and even the bottom plate is burst and lifted, so that the reinforced arc elimination device of the circuit breaker, which has the advantages of good mounting reliability, high impact strength, safe electric clearance and arc gas elimination, is provided.
In order to achieve the purpose, the invention provides a reinforced flashover eliminating device of a circuit breaker, which comprises a terminal cover arranged at one end of the circuit breaker body and an insulating support bottom plate arranged at the bottoms of the circuit breaker body and the terminal cover, wherein the terminal cover comprises a plurality of partition plates which are arranged at intervals in parallel and are abutted against the mounting bottom plate, the insulating support bottom plate and the terminal cover are fixedly connected through a mounting structure, the mounting structure comprises a plurality of limit grooves which are arranged on the insulating support bottom plate at intervals, a plurality of mounting columns which are arranged in the limit grooves, and a plurality of mounting guide holes which are arranged at the bottoms of the partition plates and are sleeved on the mounting columns, the mounting guide holes extend to penetrate through the top of the terminal cover, the bottoms of the partition plates are accommodated in the limit grooves in a matched mode, and penetrate into the mounting guide holes through fixing pieces to be fixedly connected with the mounting columns.
In the reinforced flashover eliminating device of the circuit breaker, the upper end of the mounting column is in a round table shape, the formed round hole is embedded with the stud, and the fixing piece is a screw rod which is fixedly connected in the stud.
In the reinforced arc extinguishing device of the circuit breaker, the terminal cover comprises a plurality of arc extinguishing cavities formed between a plurality of partition boards, the insulating support base plate comprises a plurality of separation grooves formed between a plurality of limit grooves, the separation grooves are correspondingly positioned at the bottoms of the arc extinguishing cavities, one end of each separation groove is provided with an outlet extending to the end part of the insulating support base plate, and the other end of each separation groove is provided with an isolation convex strip connected with the side walls of two adjacent limit grooves.
In the reinforced arc-extinguishing device of the circuit breaker, one end of the circuit breaker body is correspondingly provided with a plurality of wiring grooves connected with a plurality of arc-extinguishing cavities, the tops of the arc-extinguishing cavities are top plate surfaces of the terminal cover, the top plate surfaces are provided with baffle plate parts which extend to cover the tops of the wiring grooves, and the baffle plate parts are fixedly connected with the circuit breaker body through first screw structures.
In the reinforced arc elimination device of the circuit breaker, the accommodating groove matched with the circuit breaker body is formed in the insulating supporting bottom plate, the plurality of limiting grooves are formed in one end of the accommodating groove, limiting projections for limiting the other end of the circuit breaker body are arranged at the other end of the accommodating groove, and the insulating supporting bottom plate is fixedly connected with the circuit breaker body through a second screw structure.
In the reinforced flashover eliminating device of the circuit breaker, the insulating supporting bottom plate is formed by any one or a combination of more of flame-retardant fiber reinforced unsaturated polyester molding compound SMC/BMC, flame-retardant reinforced plastic ABS, flame-retardant reinforced plastic PP, flame-retardant reinforced plastic PC, flame-retardant reinforced nylon and ceramic. In the reinforced arc elimination device of the circuit breaker, the terminal cover comprises a plurality of arc elimination grid plates arranged in an arc elimination cavity at intervals and a plurality of air hole structures arranged on the arc elimination grid plates, wherein the air hole structures on the two arc elimination grid plates are arranged in a staggered mode left and right for a certain distance, the front end of the arc elimination cavity is a front plate surface and a connecting port positioned below the front plate surface, a plurality of exhaust holes are formed in the front plate surface, and the rear end of the arc elimination cavity is an opening end connected with the wiring groove.
In the reinforced arc elimination device of the circuit breaker, the arc elimination grid plate is of an L-shaped structure, and one end of the arc elimination grid plate is bent and formed with an elimination part opposite to the separation groove; or, the arc-extinguishing grid plate is of a U-shaped structure, and two ends of the arc-extinguishing grid plate are bent and formed with two arc-extinguishing parts respectively opposite to the separation groove and the top plate surface.
In the reinforced arc elimination device of the circuit breaker, at least one convex rib structure is formed between the arc elimination grid sheet and the arc elimination part in a punching mode; each arc-extinguishing cavity is internally provided with two arc-extinguishing grid plates, each arc-extinguishing cavity comprises a plurality of groups of mounting clamping grooves which are oppositely arranged on side walls of two sides and are used for connecting the arc-extinguishing grid plates, and at least one clamping table structure which is clamped in the mounting clamping grooves in a matched mode is formed on the side edges of two sides of the arc-extinguishing grid plates respectively in a stamping mode.
In the reinforced arc elimination device of the circuit breaker, the cover body comprises a plurality of installation convex strips arranged on the rear side edges of the plurality of partition boards and a plurality of first slots arranged on the front side edges of the plurality of partition boards, a plurality of arc baffles are positioned and inserted in the plurality of first slots, and a plurality of second slots which are in insertion fit with the plurality of installation convex strips are correspondingly arranged at one end of the circuit breaker body.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. in the reinforced arc elimination device of the circuit breaker, when the terminal cover is installed, the plurality of partition plates are installed in the plurality of limit grooves in an adapting way, the plurality of installation columns are inserted into the installation guide holes of the plurality of partition plates, so that the plurality of partition plates are positioned and installed on the insulating support bottom plate, finally, the fixing pieces penetrate into the installation guide holes to be fixedly connected with the installation columns, the installation connection strength is increased, the installation fixing between the terminal cover and the insulating support bottom plate is realized, the installation reliability between the insulating support bottom plate and the terminal cover is improved by the installation design, the impact strength is high, the limit grooves and the limit matching formed between the installation columns and the partition plates can be utilized to prevent the terminal cover from moving forwards and backwards and leftwards on the insulating support bottom plate when being impacted, the limit support effect is good, the inter-phase creepage distance is increased according to the fact that the plurality of partition plates are surrounded and isolated by the plurality of limit grooves, the inter-phase arc jumping phenomenon is prevented, the safety gap after the terminal cover is installed is ensured by penetrating through the bottom of the partition plates, the safety gap after the terminal cover is installed is prevented, the safety and the electric performance of the equipment is stable, the arc elimination device is realized, the effect of breaking and the terminal cover and the secondary arc elimination effect and the mechanical arc elimination effect and the breaking performance and the zero-elimination effect and the mechanical arc elimination performance and the breakdown strength and the mechanical explosion resistance and the breakdown strength and the impact resistance are greatly used are improved are the terminal is realized.
2. In the reinforced arc elimination device of the circuit breaker, the insulation supporting bottom plate comprises a plurality of separation grooves formed among a plurality of limit grooves, one end of each separation groove is provided with an outlet, the other end of each separation groove is provided with the separation convex strips connected with the side walls of the two adjacent limit grooves, the separation grooves with the semi-enclosed structure design can further increase the inter-phase creepage distance among a plurality of arc elimination cavities through being matched with the limit grooves, so that a part of free gas moving towards the bottom of the arc elimination cavity is contacted with the separation grooves and then is discharged from the outlet as soon as possible, and meanwhile, some residual arc can be blocked to flow back to one side of the circuit breaker by utilizing the separation convex strips, so that the reinforced arc elimination device is safer and more stable to use.
3. According to the reinforced flashover eliminating device for the circuit breaker, the insulating supporting bottom plate is integrally formed by the insulating high-temperature-resistant material, the forming and manufacturing are convenient, the reinforced flashover eliminating device has the characteristics of good heat resistance, good dimensional stability, high mechanical strength, excellent impact strength and the like, the circuit breaker is arranged in the accommodating groove formed by the insulating supporting bottom plate, and the two ends of the circuit breaker are respectively arranged at the two ends of the accommodating groove according to the limiting groove and the limiting protruding block, so that the two ends of the circuit breaker are limited by the limiting groove and the limiting protruding block, the circuit breaker is positioned and mounted on the insulating supporting bottom plate to prevent the circuit breaker from shaking and shifting at the mounting position, the positioned circuit breaker is fixed through the second screw structure, the mounting structure is simple, the mounting is convenient and quick, the mounting efficiency is improved, the mounting supporting and insulating effects on the circuit breaker are realized through the insulating supporting bottom plate, and the impact withstand voltage of a product is improved.
4. In the reinforced arc extinction device of the circuit breaker, the arc extinction grating plates are arranged at intervals according to the arc extinction cavity, and the air hole structures on the two arc extinction grating plates arranged front and back are staggered left and right, so that the arc free gas moves forwards in a bending path between the arc extinction grating plates, the arc gas is effectively prevented from directly passing through the arc extinction grating plates, the movement distance of the arc gas passing through the arc extinction grating plates is increased, the contact time is prolonged, the cooling of the arc and metal particles is facilitated, the arc gas is better subjected to the arc extinction and extinction effect, and the outward ejection of metal particles is prevented, so that the aim of eliminating the arc extinction is fulfilled.
5. In the reinforced arc extinguishing device of the circuit breaker, the arc extinguishing grid plate is of an L-shaped structure, and the arc extinguishing grid plate is bent at one end of the arc extinguishing grid plate to form the arc extinguishing part, so that the reinforced arc extinguishing device has the advantages that when a part of arc gas moves in the arc extinguishing cavity and is blocked, the arc gas flows back towards the bottom of the arc extinguishing cavity to contact the arc extinguishing part, and flows to the bottom of the arc extinguishing cavity after being subjected to secondary arc extinguishing through the arc extinguishing part, so that the residual arc flowing to the bottom of the arc extinguishing cavity can be better cut, the arc can be cooled more quickly, metal particles carried in the arc gas can be eliminated and filtered, the ablation damage to a busbar at the bottom of the terminal cover can be avoided, the protection effect is good, and the requirement of zero arc extinguishing is better met.
6. In the reinforced arc elimination device of the circuit breaker, the plurality of convex rib structures are formed between the arc elimination grid plates and the arc elimination parts, so that the overall structural strength of the arc elimination grid plates can be increased, deformation of the arc elimination grid plates caused by uneven stress due to overlarge span is avoided, the load bearing capacity of the arc elimination grid plates is greatly improved, the structural stability is good, the arc elimination grid plates can bear larger gas pressure impact without deformation, and the service performance and the service life of the arc elimination grid plates are improved.
7. According to the reinforced arc-extinguishing device for the circuit breaker, the clamping table structures are formed on the side edges of the two sides of the arc-extinguishing grating sheet in a stamping mode, the side edges of the two sides of the arc-extinguishing grating sheet are correspondingly inserted into the group of mounting clamping grooves on the two sides of the arc-extinguishing cavity, and meanwhile the clamping table structures are driven to be extruded and clamped into the mounting clamping grooves to achieve the mounting effect of matched clamping, so that the mounting and fixing between the arc-extinguishing grating sheet and the mounting clamping grooves are achieved, the arc-extinguishing grating sheet can be prevented from loosening due to impact in the arc-extinguishing cavity, and the mounting stability is good.
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 plan view of a reinforced arc elimination device of a circuit breaker according to the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention along the line A-A;
FIG. 3 is a schematic cross-sectional view of the present invention along line B-B;
fig. 4 is a schematic structural view of the reinforced arc elimination device of the breaker after hiding the terminal cover;
fig. 5 is a schematic perspective view of a terminal cover according to the present invention;
fig. 6 is a schematic plan view of a terminal cover according to the present invention;
FIG. 7 is a schematic view of the structure of an arc extinguishing gate of the present invention;
FIG. 8 is a schematic view of the structure of an insulating support base plate of the present invention;
fig. 9 is a schematic perspective view of a reinforced arc elimination device of a circuit breaker according to the present invention;
reference numerals illustrate: 1. a circuit breaker body; 2. an insulating support base plate; 21. a separation groove; 22. isolating the raised strips; 23. a receiving groove; 24. a limit bump; 3. a terminal cover; 31. a partition plate; 32. installing guide holes; 33. an arc extinction cavity; 34. a baffle plate portion; 35. a front panel; 36. installing raised strips; 37. a first slot; 38. installing a clamping groove; 4. a limit groove; 41. a mounting column; 5. a fixing member; 6. a first screw structure; 7. a second screw structure; 8. arc extinction grating sheet; 80. an air hole structure; 81. a dissociation portion; 82. a convex rib structure; 83. a clamping table structure; 9. arc-shaped plate.
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 embodiment provides a reinforced flashover eliminating device of a circuit breaker, which is shown in fig. 1-9, and comprises a terminal cover 3 arranged at one end of a circuit breaker body 1 and an insulating support base plate 2 arranged at the bottom of the circuit breaker body 1 and the bottom of the terminal cover 3, wherein the terminal cover 3 comprises a plurality of baffle plates 31 which are arranged at intervals in parallel and are abutted on the mounting base plate, the insulating support base plate 2 and the terminal cover 3 are fixedly connected through a mounting structure, the mounting structure comprises a plurality of limiting grooves 4 which are arranged on the insulating support base plate 2 at intervals, a plurality of mounting posts 41 which are arranged in the limiting grooves 4, and a plurality of mounting guide holes 32 which are arranged at the bottom ends of the baffle plates 31 and are sleeved on the mounting posts 41, the bottom ends of the baffle plates 31 are accommodated in the limiting grooves 4 in a matching manner, and penetrate into the mounting guide holes 32 through fixing pieces 5 to be fixedly connected with the mounting posts 41.
In the above embodiment, when the terminal cover 3 is installed, the plurality of partition plates 31 are installed and accommodated in the plurality of limiting grooves 4 in an adapting manner, and meanwhile, the plurality of installation columns 41 are inserted into the installation guide holes 32 of the plurality of partition plates 31, so that a positioning installation effect is achieved on the insulating support base plate 2 for the plurality of partition plates 31, finally, the fixing pieces 5 penetrate into the installation guide holes 32 and are fixedly connected with the installation columns 41, installation connection strength is increased, installation fixing between the terminal cover 3 and the insulating support base plate 2 is achieved, installation reliability between the insulating support base plate 2 and the terminal cover 3 is improved through installation design, impact strength is high, front-back left-right displacement shaking of the terminal cover 3 on the insulating support base plate 2 can be prevented when the terminal cover 3 is impacted by utilizing limiting grooves 4 and the limiting columns 41, a good limiting support effect is achieved, pressure strength and mechanical strength of the terminal cover under the condition of instantaneous breaking are improved, inter-phase creepage distance is increased according to the fact that the plurality of partition plates 31 are surrounded and isolated by the plurality of limiting grooves 4, accordingly, inter-phase creepage distance and free gas are prevented from penetrating from the bottom of the partition plates to cause terminal cover, the fact that the terminal cover can be broken through the partition plates, the anti-explosion effect of a safe arc can be guaranteed, the anti-explosion effect of a main arc device can be achieved, and the anti-explosion effect can be avoided, and the service life of a safe device can be guaranteed, and an arc can be prevented from causing a safe explosion effect to be caused to an arc device, and a safe explosion effect.
The specific arrangement of the insulating support base plate and the terminal cover will be described in detail with reference to fig. 2 to 5 and 8:
the upper end of the mounting column 41 is in a circular truncated cone shape, a stud is embedded in a round hole formed in the mounting column, the fixing piece 5 is a screw rod which is fixedly connected in the stud, the mounting column 41 designed in this way can be more smoothly inserted into the mounting guide hole 32 of the partition plate 31, the mounting column 41 and the mounting guide hole 32 form a preset positioning fit, the axial direction of the stud is aligned with the axial direction of the mounting guide hole 32, the screw rod can be accurately connected into the stud, the mounting stress surface is facilitated to be increased, the connection condition is improved, the bearing capacity and the fatigue resistance of threaded connection are improved, the connection structural strength between the screw rod and the mounting column 41 is improved, and therefore the mounting and fixing between the terminal cover 3 and the insulating support bottom plate 2 are realized, and the mounting is stable and reliable.
As shown in fig. 5, the terminal cover 3 includes a plurality of arc extinguishing chambers 33 formed between a plurality of partition plates 31, and correspondingly, the insulating support base plate 2 includes a plurality of separation grooves 21 formed between a plurality of limit grooves 4, a plurality of the separation grooves 21 are correspondingly positioned at bottoms of the plurality of arc extinguishing chambers 33, one end of the separation groove 21 is provided with an outlet extending to an end of the insulating support base plate 2, and the other end is provided with an isolation convex strip 22 connecting side walls of two adjacent limit grooves 4. The separation groove 21 of the semi-enclosed structure design can increase the interphase creepage distance between a plurality of arc suppression cavities 33 through being matched with the limit groove 4, is favorable for improving the rated insulation voltage of products, and enables a part of free gas moving towards the bottom direction of the arc suppression cavities 33 to be discharged from an outlet position as soon as possible after contacting the separation groove 21, and meanwhile, residual electric arcs can be blocked to flow back to one side of the circuit breaker by utilizing the isolation convex strips, so that the use is safe and stable.
Further preferably, the circuit breaker body 1 one end corresponds and is provided with a plurality of wiring grooves that link to each other with a plurality of arc suppression chambeies 33, wherein, the top in a plurality of arc suppression chambeies 33 is the top face of terminal cover 3, the top face has the extension and shelters from the baffle portion 34 at a plurality of wiring groove tops, can block electric arc from wiring groove top position blowout through baffle portion 34, baffle portion 34 with through first screw structure 6 fixed connection between the circuit breaker body 1 to realize the installation connection between terminal cover and the circuit breaker.
In this embodiment, the insulating supporting base plate 2 is formed by an integral structure of insulating and high-temperature-resistant materials, the insulating and high-temperature-resistant materials include flame retardant plastic ABS, flame retardant plastic PP, flame retardant plastic PC, flame retardant nylon and ceramic, the insulating supporting base plate made of the insulating and high-temperature-resistant materials has the characteristics of good heat resistance, good dimensional stability, high mechanical strength, good impact strength and the like, in order to ensure the installation stability between the circuit breaker and the insulating supporting base plate, the insulating supporting base plate 2 is provided with a containing groove 23 suitable for installing the circuit breaker body 1, a plurality of limiting grooves 4 and a plurality of isolating raised strips 22 are correspondingly arranged at one end of the containing groove 23, the other end of the containing groove 23 is provided with a limiting bump 24 which is limited and resisted at the other end of the circuit breaker body 1, and the insulating supporting base plate 2 and the circuit breaker body 1 are fixedly connected through a second screw structure 7. According to the above structure, the limit groove 4 and the limit bump 24 are respectively arranged at two ends of the accommodating groove 23, so that two ends of the circuit breaker are limited by the limit groove 4 and the limit bump 24, and thus the circuit breaker is positioned and mounted on the insulating support base plate 2, so that the circuit breaker is prevented from swinging and shifting in mounting position, and finally the positioned circuit breaker is fixed through the second screw structure 7.
The specific structure of the terminal cover is described in detail below with reference to fig. 2 to 7:
the circuit breaker one end is equipped with three wiring groove, correspond and be equipped with three arc suppression chamber 33 on the terminal cover 3, the terminal cover 3 includes a plurality of arc suppression bars 8 of interval arrangement setting in arc suppression chamber 33 to and set up in a plurality of gas pocket structure 80 of a plurality of arc suppression bars 8, the front end in arc suppression chamber 33 is preceding face 35 and the connector that is located preceding face 35 below, be equipped with a plurality of exhaust holes on the preceding face, the rear end in arc suppression chamber is for connecting the open end of wiring groove, enters into in the arc suppression chamber 33 from the open end from circuit breaker one end spun arc gas, makes the arc gas discharge from the gas vent after the multiple arc suppression of a plurality of arc suppression bars 8, also has a part of downwardly moving's arc gas to discharge from the connector. In order to achieve a better arc extinguishing effect, the arrangement and layout of the arc extinguishing grid plates 8 are optimally designed, referring to fig. 6, a plurality of air hole structures 80 on the two arc extinguishing grid plates 8 arranged front and back are staggered left and right by a certain distance, so that the design enables arc free gas to move forward in a bending path between the arc extinguishing grid plates 8, the arc gas is effectively prevented from directly passing through the arc extinguishing grid plates 8, the movement distance of the arc gas passing through the arc extinguishing grid plates is increased, the contact time is prolonged, the cooling of the arc and metal particles is facilitated, the arc gas can be better subjected to the arc extinguishing effect, and the outward ejection of metal particles can be blocked, so that the purpose of eliminating the flashover is achieved.
As a preferred embodiment, referring to fig. 7, the arc extinguishing grating 8 has an L-shaped structure, and has a bent end formed with an arc extinguishing portion 81 opposite to the separation groove 21, so that the design has the advantages that when a part of arc gas moves towards the bottom of the arc extinguishing chamber 33 under the condition that the movement of the arc extinguishing chamber 33 is blocked, the part of arc gas contacts with the arc extinguishing portion 81, and the arc gas can flow to the bottom of the arc extinguishing chamber after being subjected to secondary arc extinguishing by the arc extinguishing portion 81, so that the residual arc flowing to the bottom of the arc extinguishing chamber 33 can have a better cutting effect, the arc can be cooled more quickly, and metal particles carried in the filtered arc gas can be eliminated, so that the ablation damage to the busbar at the bottom of the terminal cover is avoided, the protection effect is good, and the requirement of zero flashover is better achieved.
As a deformable implementation manner of the arc extinguishing grating 8, the arc extinguishing grating 8 may be further provided with a U-shaped structure, and two ends of the arc extinguishing grating 8 are bent to form two arc extinguishing portions 81 respectively opposite to the partition groove 21 and the top plate surface, so that the contact area between the arc extinguishing grating 8 and the arc gas in the arc extinguishing chamber 33 can be increased, a better arc extinguishing effect is achieved, and both the busbar at the bottom of the arc extinguishing chamber and the upper baffle surface at the top of the arc extinguishing chamber can be protected through the two arc extinguishing portions 81.
With reference to fig. 6-7, at least one protruding rib structure 82 is formed between the arc-extinguishing grating sheet 8 and the dissociation portion 81 thereof in a stamping mode, the overall structural strength of the arc-extinguishing grating sheet 8 can be increased through the protruding rib structure 82, the load bearing capacity of the arc-extinguishing grating sheet 8 is greatly improved, the structural stability is good, the arc-extinguishing grating sheet can bear large gas pressure impact without deformation, and the service performance and the service life of the arc-extinguishing grating sheet are improved.
As a concrete structure setting, be provided with two arc extinguishing bars piece 8 in every arc extinguishing chamber 33, arc extinguishing chamber 33 is including setting up in both sides lateral wall relatively and being used for connecting the multiunit installation draw-in groove 38 of arc extinguishing bars piece 8, punch forming has cooperation chucking in at least one block structure 83 in installation draw-in groove 38 respectively on the both sides lateral wall of arc extinguishing bars piece 8, these block structures 83 and the integrative structural shaping of arc extinguishing bars piece 8, the shaping preparation is convenient, structural stability is good, in the installation, insert the arc extinguishing bars piece 8 both sides side limit by bottom-to-top in a set of installation draw-in groove 38 of arc extinguishing chamber 33 both sides, drive the block structure 83 extrusion card simultaneously and go into in the installation draw-in groove 38 and reach the installation effect of cooperation chucking, thereby realize the installation fixedly between arc extinguishing bars piece 8 and the installation draw-in groove 38, can prevent arc extinguishing bars piece 8 is in the arc extinguishing chamber 33 takes place the pine phenomenon because of receiving the impact, the installation stability is good.
As shown in fig. 5 and 9, the cover body includes a plurality of mounting protruding strips 36 disposed on the rear sides of the plurality of partition boards 31, and a plurality of first slots 37 disposed on the front sides of the plurality of partition boards 31, and a plurality of arc baffles 9 are inserted in the plurality of first slots in a positioning manner, one end of the circuit breaker body 1 is correspondingly provided with a plurality of second slots which are in insertion fit with the plurality of mounting protruding strips 36, so that the mounting fit of the terminal cover 3 and the circuit breaker is realized, the possibility of inter-phase arc channeling between adjacent wire slots can be isolated through the tight fit of the mounting boss and the second slots, and the arc gases generated at each stage of the three-phase circuit breaker are respectively isolated through the plurality of arc baffles, so as to form respective exhaust channels, ensure the flow smoothness of the arc gases discharged from the terminal cover, and achieve zero arcing effect, and ensure the use safety of products.
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 (10)
1. The utility model provides a circuit breaker strenghthened type flash device that disappears, includes terminal cover (3) that sets up in circuit breaker body (1) one end, and installs insulating supporting baseplate (2) in circuit breaker body (1) and terminal cover (3) bottom, terminal cover (3) are including parallel interval setting and butt a plurality of baffles (31) on insulating supporting baseplate, a serial communication port, hold fixedly between insulating supporting baseplate (2) and terminal cover (3) through mounting structure, mounting structure includes that the interval sets up a plurality of spacing groove (4) on insulating supporting baseplate (2), and a plurality of erection column (41) that set up in a plurality of spacing groove (4) to and a plurality of erection guide holes (32) that set up in a plurality of baffles (31) bottom and cover locate a plurality of erection column (41), a plurality of erection guide holes (32) extend and run through to the top of terminal cover (3), the bottom looks adaptation of a plurality of baffles (31) is held in a plurality of spacing groove (4), penetrates installation guide hole (41) through mounting member (5) and is fixed connection post with installation.
2. The circuit breaker enhanced arc elimination apparatus of claim 1, wherein: the upper end of the mounting column (41) is in a truncated cone shape, a stud is embedded in a round hole formed in the mounting column, and the fixing piece (5) is a screw rod which is fixedly connected in the stud.
3. The circuit breaker enhanced arc elimination apparatus of claim 2, wherein: the terminal cover (3) comprises a plurality of arc suppression cavities (33) formed among a plurality of partition boards (31), the insulating support base plate (2) comprises a plurality of separation grooves (21) formed among a plurality of limit grooves (4), a plurality of separation grooves (21) are correspondingly positioned at the bottoms of the plurality of arc suppression cavities (33), one end of each separation groove (21) is provided with an outlet which extends to the end part of the insulating support base plate (2), and the other end of each separation groove is provided with an isolation convex strip (22) which is connected with the side walls of two adjacent limit grooves (4).
4. The circuit breaker enhanced arc elimination apparatus of claim 3, wherein: the circuit breaker is characterized in that a plurality of wiring grooves connected with a plurality of arc extinguishing cavities (33) are correspondingly formed in one end of the circuit breaker body (1), the tops of the arc extinguishing cavities (33) are top plate surfaces of the terminal cover (3), the top plate surfaces are provided with baffle plate parts (34) which extend to cover the tops of the wiring grooves, and the baffle plate parts (34) are fixedly connected with the circuit breaker body (1) through first screw structures (6).
5. The circuit breaker enhanced arc elimination apparatus according to claim 4, wherein: the circuit breaker is characterized in that the insulating support base plate (2) is provided with a containing groove (23) suitable for being installed the circuit breaker body (1), a plurality of limit grooves (4) and a plurality of isolation convex strips (22) are correspondingly arranged at one end of the containing groove (23), the other end of the containing groove (23) is provided with a limit lug (24) for limiting and resisting the other end of the circuit breaker body (1), and the insulating support base plate (2) and the circuit breaker body (1) are fixedly connected through a second screw structure (7).
6. The circuit breaker enhanced arc elimination apparatus of claim 1, wherein: the insulating supporting bottom plate (2) is formed by an insulating high-temperature-resistant material integrated structure, and the insulating high-temperature-resistant material comprises any one or a combination of more of flame-retardant fiber-reinforced unsaturated polyester molding compound SMC/BMC, flame-retardant reinforced plastic ABS, flame-retardant reinforced plastic PP, flame-retardant reinforced plastic PC, flame-retardant reinforced nylon and ceramic.
7. The circuit breaker enhanced arc elimination apparatus of any of claims 1-6, wherein: the terminal cover (3) comprises a plurality of arc-extinguishing grid plates (8) which are arranged in an arc-extinguishing cavity (33) at intervals, and a plurality of air hole structures (80) which are arranged on the arc-extinguishing grid plates (8), wherein the air hole structures (80) on the two arc-extinguishing grid plates (8) are arranged in a staggered mode left and right for a certain distance, the front end of the arc-extinguishing cavity (33) is a front plate surface (35) and a connecting port which is positioned below the front plate surface (35), and a plurality of exhaust holes are formed in the front plate surface.
8. The circuit breaker enhanced arc elimination apparatus according to claim 7, wherein:
the arc extinguishing grid sheet (8) is of an L-shaped structure, and one end of the arc extinguishing grid sheet is bent and formed with an arc extinguishing part (81) opposite to the separation groove (21); or, the arc extinguishing grid plate (8) is in a U-shaped structure, and two ends of the arc extinguishing grid plate are bent and formed with two arc extinguishing parts (81) respectively opposite to the separation groove and the top plate surface.
9. The circuit breaker enhanced arc elimination apparatus of claim 8, wherein: at least one convex rib structure (82) is formed between the arc extinction grid sheet (8) and the arc extinction part (81) in a stamping mode; two arc-extinguishing grid plates (8) are arranged in each arc-extinguishing cavity (33), each arc-extinguishing cavity (33) comprises a plurality of groups of mounting clamping grooves (38) which are oppositely arranged on two side walls and are used for connecting the arc-extinguishing grid plates (8), and at least one clamping table structure (83) clamped in the mounting clamping grooves (38) is formed on two side edges of each arc-extinguishing grid plate (8) in a matched mode.
10. The circuit breaker enhanced arc elimination apparatus according to claim 7, wherein: the terminal cover (3) comprises a plurality of mounting convex strips (36) arranged on the rear side edges of the plurality of partition boards (31), a plurality of first slots (37) arranged on the front side edges of the plurality of partition boards (31), a plurality of arc barriers (9) are positioned and inserted in the plurality of first slots, and a plurality of second slots which are in insertion fit with the plurality of mounting convex strips (36) are correspondingly arranged at one end of the circuit breaker body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311559217.1A CN117334533A (en) | 2023-11-21 | 2023-11-21 | Reinforced flashover eliminating device for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311559217.1A CN117334533A (en) | 2023-11-21 | 2023-11-21 | Reinforced flashover eliminating device for circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117334533A true CN117334533A (en) | 2024-01-02 |
Family
ID=89290616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311559217.1A Pending CN117334533A (en) | 2023-11-21 | 2023-11-21 | Reinforced flashover eliminating device for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117334533A (en) |
-
2023
- 2023-11-21 CN CN202311559217.1A patent/CN117334533A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101562083A (en) | Arc chute assembly for a circuit breaker | |
| EP4210082A1 (en) | Switch unit and switch apparatus | |
| CN216871882U (en) | Arc extinguish chamber structure of universal circuit breaker | |
| CN117936334A (en) | Free terminal cover disappears | |
| CN221447076U (en) | Reinforced flashover eliminating device for circuit breaker | |
| CN108766848B (en) | Arc extinguishing structure of circuit breaker | |
| CN112820593B (en) | Wiring device of circuit breaker | |
| CN117334533A (en) | Reinforced flashover eliminating device for circuit breaker | |
| CN110047717B (en) | Arc isolation cover of circuit breaker | |
| CN112908799A (en) | Arc extinguishing system and circuit breaker | |
| CN217544514U (en) | Arc extinguishing system of circuit breaker and circuit breaker | |
| CN116153733A (en) | Spliced arc extinguishing system for molded case circuit breaker | |
| CN112786325B (en) | Circuit breaker arc breaking structure with anti-corrosion effect | |
| CN214624930U (en) | Dissociating eliminating structure of circuit breaker | |
| CN214378308U (en) | Arc extinguishing system and circuit breaker | |
| CN220895376U (en) | Arc extinction device of isolating switch | |
| CN112582236A (en) | Arc extinguishing device of circuit breaker | |
| CN214175959U (en) | Planar magnetic blowout arc extinguishing structure and circuit breaker | |
| CN219716789U (en) | Insulating terminal cover of molded case circuit breaker | |
| CN214505419U (en) | Circuit breaker arc extinguishing device and circuit breaker | |
| CN118116783B (en) | Arc extinction structure of alternating current/direct current dual-purpose circuit breaker | |
| CN220155475U (en) | Dissociation device and circuit breaker | |
| KR102681439B1 (en) | Circuit breaker safety cover | |
| CN219203078U (en) | Zero arcing cover for molded case circuit breaker | |
| CN217444305U (en) | Breaker outer casing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |