CN117079998A - Arc extinguishing device - Google Patents
Arc extinguishing device Download PDFInfo
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- CN117079998A CN117079998A CN202311087080.4A CN202311087080A CN117079998A CN 117079998 A CN117079998 A CN 117079998A CN 202311087080 A CN202311087080 A CN 202311087080A CN 117079998 A CN117079998 A CN 117079998A
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- cavity
- arc extinguishing
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- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 abstract description 16
- 238000002679 ablation Methods 0.000 description 10
- 239000011810 insulating material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
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- 230000008901 benefit Effects 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 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 description 1
- DUCFBDUJLLKKPR-UHFFFAOYSA-N [O--].[Zn++].[Ag+] Chemical compound [O--].[Zn++].[Ag+] DUCFBDUJLLKKPR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- UYKQQBUWKSHMIM-UHFFFAOYSA-N silver tungsten Chemical compound [Ag][W][W] UYKQQBUWKSHMIM-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
-
- 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
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The application discloses an arc extinguishing device, which specifically comprises: a housing having a cavity formed therein; an exhaust opening and a movable arc contact inlet are formed in the shell; the static arc contact is arranged in the cavity, and the moving arc contact is contacted with the static arc contact after entering the cavity from the moving arc contact inlet; the gas generating piece is arranged at one side of the moving path of the moving arc contact in the cavity; the air passage is formed in the cavity, the air inlet of the air passage faces the gas generating piece, and the air outlet of the air passage faces the exhaust opening; the grid plate component is arranged in the air passage; the arc baffle is arranged between the exhaust opening and the air outlet of the air flue, and a heat radiation hole is formed in the arc baffle. In the scheme provided by the embodiment of the application, the arc extinguishing device can eliminate the arc generated by the arc contact in the shell, is applied to a switch mechanism, can protect the contact in opening and closing, and prolongs the service life of the switch mechanism; the arc extinguishing device is characterized in that each component is arranged in the shell, and the electric arc is eliminated in a cavity defined by the shell, so that the electric arc can be prevented from leaking.
Description
Technical Field
The application relates to the technical field of arc treatment, in particular to an arc extinguishing device.
Background
In the switching mechanism, an arc is generated between the moving contact and the fixed contact during switching on and switching off, and the arc easily ablates the contact to damage the switching mechanism. In order to eliminate the arc, an arc extinguishing device can be arranged in the switching mechanism, and contacts of a main circuit of the switching mechanism are protected when the switching mechanism is opened and/or closed through the arc extinguishing device.
In the existing outdoor switch arc-extinguishing scheme, the number of times of the arc-extinguishing device which can realize that both opening and closing can protect the main loop contact is lower, and the number of times of the arc-extinguishing device is only about 10 times generally; the arc extinguishing device with high electric life times can only protect the main circuit contact of the switching mechanism when switching off, and can ablate the main circuit contact of the switching mechanism when switching on. In addition, in order to prevent the main contact from being ablated due to arc leakage, increase the risk of electric shock to the operator, and the like, it is necessary to further require external total insulation of the arc extinguishing device.
Disclosure of Invention
In view of the foregoing, the present application provides an arc extinguishing device that overcomes or at least partially solves the foregoing problems, where the technical solutions are as follows:
an arc extinguishing device, comprising:
a housing having a cavity formed therein; an exhaust opening and a movable arc contact inlet are formed in the shell; the static arc contact is arranged in the cavity, and the moving arc contact is contacted with the static arc contact after entering the cavity from the moving arc contact inlet;
the gas generating piece is arranged at one side of the moving path of the moving arc contact in the cavity;
the air passage is formed in the cavity, an air inlet of the air passage faces the air generating piece, and an air outlet of the air passage faces the air exhaust opening;
the grid plate assembly is arranged in the air passage;
the arc baffle is arranged between the exhaust opening and the air outlet of the air flue, and a heat radiation hole is formed in the arc baffle.
In the arc extinguishing device, optionally, the exhaust opening is arranged at the top of the shell; the cavity is divided into a first mounting cavity and a second mounting cavity from bottom to top; the static arc contact and the gas generating piece are arranged in the first mounting cavity, and the first mounting cavity also accommodates a movement path of the moving arc contact in the cavity; the arc baffle is arranged in the second installation cavity.
The above-mentioned arc extinguishing device, optionally, the gas production spare includes after the moving arc contact gets into the cavity is inside towards the first surface of moving arc contact, moving arc contact in-process with the minimum interval of first surface is first distance, in the first distance the electric arc that moving arc contact and quiet arc contact produced can arouse gas production spare exhaust gas, just first distance is not less than gas production spare's failure distance.
The arc extinguishing device is optional, wherein the first distance is between 4mm and 10 mm.
In the above arc extinguishing device, optionally, the first surface is an uneven surface.
Foretell arc control device, optionally, the bars piece subassembly includes polylith parallel arrangement's arc extinguishing bars piece, every one side of arc extinguishing bars piece sets up the breach, the breach of polylith arc extinguishing bars piece forms the arc extinguishing passageway, the arc extinguishing passageway sets up moving arc contact is on the inside motion path of cavity.
The above arc extinguishing device is optional, the arc extinguishing device is arranged in a switch mechanism, the switch mechanism comprises a moving blade and a static blade, the static blade is provided with a static main contact and a static arc contact, the moving blade is provided with a moving main contact and a moving arc contact, and the moving main contact and the moving arc contact on the moving blade are respectively connected with or separated from the static main contact and the static arc contact on the static blade by moving the moving blade;
and among the arc extinguishing grid sheets which are arranged in parallel, the arc extinguishing grid sheet closest to the static arc contact is connected with the static arc contact or the static main contact, and the thickness of the arc extinguishing grid sheet is thicker than that of all the rest arc extinguishing grid sheets.
The above arc extinguishing device, optionally, the grid assembly includes a plurality of arc extinguishing grid plates arranged in parallel, the plurality of arc extinguishing grid plates are arranged beside a moving path of the moving arc contact in the cavity and cover the whole moving path of the moving arc contact in the cavity
When the movable arc contact moves in the cavity, the distance between each arc extinguishing gate sheet and the movable arc contact is not lower than a set distance.
According to the arc extinguishing device, optionally, the plurality of arc extinguishing grid plates are arranged in parallel at equal intervals.
The arc extinguishing device comprises at least two arc baffles which are arranged in parallel, wherein radiating holes in the at least two arc baffles are arranged in a staggered mode, and the shortest distance between the arc baffle closest to the grid plate assembly and the grid plate assembly is not less than 5mm.
Compared with the prior art, the application has the following advantages: in the scheme provided by the embodiment of the application, the arc extinguishing device can eliminate the arc generated by the arc contact in the shell, is applied to a switch mechanism, can protect the contact in opening and closing, and prolongs the service life of the switch mechanism; each component of the arc extinguishing device is arranged in the shell, and the electric arc is eliminated in a cavity defined by the shell, so that the electric arc can be prevented from leaking; further, in the embodiment, an insulating shell is adopted to realize a fully-insulating arc extinguishing device.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of an arc extinguishing device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an arc extinguishing device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an arc extinguishing device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an arc extinguishing device according to an embodiment of the present application;
wherein, 1-shell; 2-an arc baffle; 3-bottom of the cavity; 4-an exhaust opening; 5-gas generating piece; 6-moving arc contacts; 7-static arc contacts; 8-grid plate assembly; 9-moving arc contact inlet.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The arc extinguishing device provided by the embodiment of the application comprises a shell 1 and various internal devices installed through the shell 1, wherein a cavity is formed in the shell 1, and the various internal devices of the arc extinguishing device are arranged in the cavity formed by the shell 1. Referring to fig. 1 and 2, there is shown an external front view and a top view of a housing 1 of an arc extinguishing device according to an embodiment of the present application, the housing 1 may be formed in any shape, a through cavity having any cross-sectional shape is formed in the housing 1, and a square through cavity having a uniform cross-sectional shape is formed as shown in fig. 1 and 2, but the present application is not limited to the case structure shown in fig. 1 and 2. The static arc contact 7 is arranged in the cavity, a moving arc contact inlet 9 is formed on one surface of the shell 1, the moving arc contact 6 enters the cavity from the moving arc contact inlet 9, moves along a set movement track in the cavity and contacts with the static arc contact 7.
Referring to fig. 3, an internal schematic cross-section of an arc extinguishing device provided by an embodiment of the present application is shown, and the structure shown in fig. 3 is a feasible implementation scheme of the arc extinguishing device provided by the embodiment of the present application, where the arc extinguishing device further includes:
the gas generating part 5 is arranged at one side of a moving path of the moving arc contact 6 in the cavity; the air passage is formed in the cavity, the air inlet of the air passage faces the air generating piece 5, and the air outlet of the air passage faces the air exhaust opening 4; a grid assembly 8 is arranged in the air passage; the arc baffle 2 is arranged between the exhaust opening 4 and the air outlet of the air flue, and the arc baffle 2 is provided with a heat radiation hole.
In the device provided by the embodiment of the application, optionally, an exhaust opening 4 is formed on one surface of the shell 1, and hot air in the cavity can be exhausted from the exhaust opening 4 during arc extinction; considering that the hot air generated by arc extinction has small specific gravity, the hot air floats upwards under the action of cold air with large specific gravity, and the exhaust opening 4 is optionally arranged at the top of the shell, for example, the top surface or the side surface of the shell is close to the top, so that the hot air generated in the cavity is conveniently discharged from the exhaust opening 4 at the top, and the discharge of heat energy generated by an electric arc is facilitated.
Further, the air in the cavity is heated by arc heat generated by a switching circuit of the movable arc contact 6 and the static arc contact 7, the movable arc contact 6 and the static arc contact 7 are optionally arranged at the bottom 3 of the cavity or at the position close to the bottom 3 of the cavity, and the cavity is optionally divided into a first installation cavity and a second installation cavity from bottom to top; the static arc contact 7 and the gas generating piece 5 are arranged in the first mounting cavity, and the first mounting cavity also accommodates the movement path of the moving arc contact 6 in the cavity; the second installation cavity is internally provided with the arc baffle 2, so that the moving path of the moving arc contact 6 in the cavity is limited at the cavity bottom 3, the air at the cavity bottom 3 is heated by the arc heat, the air rises upwards through the air passage, and finally, the arc baffle 2 discharges the hot air and simultaneously prevents the arc from being exposed.
In fact, the exhaust opening 4, as well as the moving and stationary arcing contacts 6, 7, may also be provided at other possible locations, through which air passage the air heated by the arc generated by the moving and stationary arcing contacts 6, 7 can be discharged out of the cavity. The airway is not shown in the figures, and alternatively, the airway opening size or cross-sectional shape may be of various types, such as two-end large and middle small, one-side large and side small, and the like.
The arc temperature generated by switching on and off the arc is relatively high, typically up to 3000-30000 ℃, which causes a significant amount of heat to build up in the chamber, requiring the chamber to be evacuated in a relatively short period of time. In the device provided by the embodiment of the application, the gas generating piece 5 is arranged, and the gas generating insulating material on the gas generating piece 5 is eroded by the electric arc to generate gas, so that the electric arc can be cooled, and the heat in the cavity can be timely discharged from the exhaust opening 4. Optionally, the gas generating member 5 includes a first surface that faces the moving arc contact 6 after the moving arc contact 6 enters the cavity, the first surface is made of a gas generating material, and when an electric arc is generated, the gas generating member 5 can quickly absorb heat, and a large amount of gas is discharged to help heat energy discharge and arc extinction.
In the device provided by the embodiment of the application, the gas generating piece 5 is arranged at one side of the moving arc contact 6 in the moving path in the cavity, the moving arc contact 6 moves on the moving path in the moving path and contacts with the static arc contact 7 to generate an open arc, so that the gas generating piece 5 is arranged beside the moving path in the cavity of the moving arc contact 6 so as to be convenient for receiving the arc. Further, the moving arcing contact 6 may contact the static arcing contact 7 at least one point on the inner moving path of the cavity, referring to fig. 3, an example that the moving arcing contact 6 contacts the static arcing contact 7 only at one point on the inner moving path is shown, in fact, the moving arcing contact 6 may also contact the static arcing contact 7 in a sliding manner, and the moving arcing contact 6 always keeps contact with the static arcing contact 7 in a sliding manner within a distance of one end of the moving arcing contact 6, which is not shown in the drawing.
Optionally, a gas generating part 5 is arranged at a part or the whole length of the moving path in the cavity of the moving arc contact 6, and the gas generating part 5 is optionally arranged at one side, close to the bottom of the cavity, of the moving path in the cavity of the moving arc contact 6, so that the gas generating part 5, the moving arc contact 6, the static arc contact 7, the air passage and the arc baffle 2 are sequentially arranged in the cavity from bottom to top, and heat is conveniently discharged.
Alternatively, the first surface of the gas generating member 5 may be disposed around the movement path of the moving arcing contact 6 in the cavity, for example, a first surface of a half peripheral surface is disposed beside the movement path of the moving arcing contact 6 in the cavity, and a gap is left on the first surface, so that the generated gas can be discharged. The gas generating member 5 has a certain thickness and is capable of withstanding arc erosion.
Optionally, the minimum distance between the moving arc contact 6 and the first surface in the moving process of the moving arc contact 6 is a first distance, because the moving arc contact 6 surface may not be a plane, the first surface may not be a plane structure, in the moving process of the moving arc contact 6, the distance between any point on the moving arc contact 6 and any point on the first surface may be different, the minimum distance between any point on the moving arc contact 6 and any point on the first surface is set to be the first distance, by setting the first distance, the gas generating piece 5 can realize the ablation gas emission, and the gas generating effect cannot be generated due to too close setting, and the failure distance of the gas generating piece can be set according to the self characteristics of the gas generating piece. Further, the first distance is set to be the shortest distance not smaller than the failure distance of the gas generating member, and the longest distance not larger than the distance that the electric arc generated by the moving arc contact 6 and the static arc contact 7 can excite the gas generating member 5 to discharge gas. Alternatively, if the first distance is between 4mm and 10mm, there is a risk that the gas generating member 5 fails below 4mm, and there is a risk that an arc above 10mm cannot trigger the gas generating member 5 to discharge a large amount of gas to assist in arc discharge.
Alternatively, the first surface of the gas generating member 5 may be a smooth curved surface or an uneven surface. On one hand, the uneven surface has larger surface area, larger gas yield and better gas production effect, and can improve heat dissipation and arc extinction efficiency; on the other hand, the distances between each point of the smooth curved surface and the arc contact are similar, the gas generating part can not be used after breakdown, but some places such as the protruding surface are more close to the arc contact and are easy to break down, and some places such as the recessed surface are more distant from the arc contact and are not easy to break down, and the gas generating part 5 can also be continuously used to realize gas generation after the protruding surface is broken down, so that the whole service life of the gas generating part 5 with the uneven surface is longer.
In the device provided by the embodiment of the application, arc extinguishing grid plates are adopted for arc extinguishing, a grid plate assembly 8 is arranged in an air passage, optionally, the grid plate assembly 8 comprises a plurality of arc extinguishing grid plates which are arranged in parallel, the arc extinguishing grid plates participate in conduction and the arc extinguishing grid plates do not participate in conduction, and referring to fig. 4, an internal structure implementation diagram of the arc extinguishing device provided by the embodiment of the application when the arc extinguishing grid plates participate in conduction is shown, the grid plate assembly 8 comprises a plurality of arc extinguishing grid plates which are arranged in parallel, one side of each arc extinguishing grid plate is provided with a notch, the notches of the arc extinguishing grid plates form an arc extinguishing channel, and the arc extinguishing channel is arranged on a moving path of the moving arc contact in a cavity. Optionally, each arc-extinguishing gate sheet has the same structure and can be arranged in parallel in one direction, each arc-extinguishing gate sheet is provided with a notch at the same end, the shapes and the sizes of the notches can be the same, and the shapes of the notches can be square or other shapes, so that the notches of each arc-extinguishing gate sheet jointly form an arc-extinguishing channel. The arc extinguishing channel is arranged on the moving path of the moving arc contact in the cavity, so that the moving arc contact can move in the arc extinguishing channel after entering the cavity, and an electric arc generated by the switching-on and switching-off of the moving arc contact and the static arc contact can enter the arc extinguishing channel.
Further, the arc extinguishing device may be disposed in a switch mechanism, where the switch mechanism includes a moving blade and a static blade, the static blade is provided with a static main contact and a static arc contact 7, the moving blade is provided with a moving main contact and a moving arc contact 6, and the moving blade is moved to make the moving main contact and the moving arc contact 6 on the moving blade respectively connected with or separated from the static main contact and the static arc contact 7 on the static blade; the arc extinguishing grid plates are to participate in conduction, the arc extinguishing grid plate closest to the static arc contact 7 in the plurality of arc extinguishing grid plates arranged in parallel is required to be directly connected to the static arc contact or the static main contact, and the thickness of the arc extinguishing grid plate closest to the static arc contact 7 in the plurality of arc extinguishing grid plates arranged in parallel is thicker than the thickness of the rest arc extinguishing grid plates; when the moving arc contact 6 moves in the arc extinguishing channel, the moving arc contact 6 is not directly connected with each arc extinguishing grid piece, and each arc extinguishing grid piece keeps a certain gap with the moving arc contact 6. In the device provided by the embodiment of the application, the switching mechanism is provided with the moving arc contact 6 and the static arc contact 7, and the contact process of the moving arc contact 6 and the static arc contact 7 is limited in the arc extinguishing device, so that the moving arc contact 6 and the static arc contact 7 are ablated even if the arc ablating contact is also ablated, the moving main contact and the static main contact cannot be ablated, and the main contact of the switching mechanism can be well protected.
The scheme that the arc extinguishing device provided by the embodiment of the application does not participate in conduction is also provided, and referring to fig. 3, an implementation diagram of an internal structure when the arc extinguishing device provided by the embodiment of the application does not participate in conduction is shown, the grid assembly comprises a plurality of arc extinguishing grid plates arranged in parallel, the plurality of arc extinguishing grid plates are arranged beside a motion path of the moving arc contact 6 in a cavity, optionally, the plurality of arc extinguishing grid plates are arranged along a direction parallel to the motion direction of the moving arc contact 6, and the plurality of arc extinguishing grid plates arranged in parallel cover the whole motion path of the moving arc contact 6 in the cavity; when the movable arc contact 6 moves in the cavity, the distance between each arc extinguishing grid sheet and the movable arc contact 6 is not lower than a set distance.
Referring to fig. 3, the arc extinguishing bars do not participate in conduction, and a plurality of parallel arc extinguishing bars cover the whole movement path from the separation of the moving arc contact 6 and the static arc contact 7 to the separation of the moving arc contact 6 from the cavity, so that the arc extinguishing bars can work at each stage and position of arc generation. And in the moving process of the moving arc contact 6, each arc extinguishing gate sheet keeps a certain gap distance with the moving arc contact 6, so that the arc extinguishing gate sheets do not participate in the conducting process when the arc extinguishing device of the embodiment is applied to a switching mechanism. Optionally, the static arc contact 7 is disposed at the bottom of the cavity or near the bottom, the moving path of the moving arc contact 6 is also limited at the bottom of the cavity or near the bottom, the grid assembly can be disposed at the middle of the cavity, the arc extinguishing grid plates in the grid assembly are disposed in parallel, the gaps between adjacent arc extinguishing grid plates can be communicated with the exhaust openings at the bottom of the cavity and the top of the cavity, and the hot air flow at the bottom of the cavity can be discharged from the exhaust openings.
Optionally, the arc extinguishing bars can be arranged in parallel at equal intervals, but the scheme of arranging the arc extinguishing bars in different gaps is not discharged. The arc extinguishing bars can be installed through the side wall of the shell or in the cavity through other feasible modes, the arc extinguishing bars are metal arc extinguishing bars generally, the shell is made of insulating materials, devices made of internal conductive materials such as the metal arc extinguishing bars are installed through the insulating shell, the external contactable parts of the arc extinguishing device can be guaranteed to be nonconductive, and the contact safety is improved.
In the device provided by the embodiment of the application, the arc extinguishing grid sheet participates in the scheme of electric conduction, and has a heat conduction effect besides the electric conduction effect, so that the arc extinguishing grid sheet can absorb the heat energy of an arc and help to dissipate heat; in the scheme that the arc-extinguishing grid sheets do not participate in electric conduction, the arc-extinguishing grid sheets are mainly used for achieving heat conduction, and the arc-extinguishing grid sheets are arranged in the air passage, so that a better arc-extinguishing effect is achieved, arc heat can be consumed as soon as possible, and hot air flow can be discharged as soon as possible.
In the device provided by the embodiment of the application, the arc baffle 2 is arranged between the air passage air outlet and the exhaust opening 4, hot air in the cavity is exhausted from the air passage air outlet after passing through the air passage, and a small amount of electric arcs can be arranged in the exhaust of the air passage air outlet besides the hot air, so that the arc baffle 2 has the function of allowing the hot air to be exhausted but preventing the electric arcs from being exhausted. Optionally, the arc extinguishing device adopts at least two arc baffles 2 arranged in parallel, and heat dissipation holes on the at least two arc baffles 2 are arranged in a staggered manner. Furthermore, a plurality of small holes can be formed in each arc baffle plate 2 to serve as heat dissipation holes, the small holes can be symmetrically distributed or scattered on the arc baffle plates 2, the small holes on different arc baffle plates 2 can be arranged in a staggered mode or are opposite to each other, and the electric arcs can be further prevented from flowing out when the small holes on different arc baffle plates 2 are arranged in a staggered mode.
Alternatively, the arc baffle 2 can be arranged on the side surface of the cavity to cover the whole cross section of the cavity, the cavity is divided into two parts by the arc baffle 2, the air outlet of the air passage is arranged at one part, and the air exhaust opening 4 is arranged at the other part; the arc baffle 2 can be arranged at the air outlet of the air passage only to cover the whole air outlet of the air passage, and if the air outlet of the air passage does not cover the whole cross section of the cavity, the arc baffle 2 can also not cover the whole cross section of the cavity, so that the materials and the cost are saved. Further, the arc baffle 2 may be made of an insulating material, or the arc baffle 2 closest to the exhaust opening 4 may be made of an insulating material.
Optionally, the shortest distance between the arc baffle closest to the grid assembly and the grid assembly is not less than 5mm. The distance between the arc baffle 2 closest to the grid assembly and the grid assembly 8 is set such that the gas passing through the grid assembly 8 has a buffer channel before reaching the nearest arc baffle 2, and is further set to be not less than 5mm. In the device provided by the embodiment of the application, the arc extinguishing device is optionally applied to the switching mechanism, so that the arc discharge time is reduced for improving the speed of opening and closing, and the arc energy is controlled, so that the power assisting mechanism can be increased, the power assisting mechanism can optionally comprise a plurality of connecting rods, springs and other devices, and the speed of opening and closing is increased through the release of energy storage of the parts such as the springs.
In the device provided by the embodiment of the application, optionally, ablation-resistant and wear-resistant materials can be adopted at the contact part of the movable arc contact 6 and the static arc contact 7, so that the ablation amount of the movable arc contact 6 and the static arc contact 7 can not be too large during each opening and closing, and the thickness of the adopted ablation-resistant and wear-resistant materials can meet the requirements of corresponding electric service life. Furthermore, the ablation-resistant and wear-resistant material comprises at least one of silver-tungsten alloy, copper-tungsten alloy and silver-zinc oxide alloy, and the ablation-resistant and wear-resistant metal material can ensure that the ablation amount of the movable arc contact and the static arc contact is not too large in the contact process; optionally, the thickness of the ablation-resistant and wear-resistant metal material cover is not less than 40um, so as to ensure corresponding electric life requirements.
In the device provided by the embodiment of the application, optionally, the shell of the arc extinguishing device is made of an insulating material, so that the arc extinguishing device provided by the embodiment of the application is a fully-insulating arc extinguishing device; further, the insulating material can be a high-temperature resistant flame-retardant material, and a certain thickness is considered. The inner cavity of the shell of insulating material forms an arc extinguishing chamber, each device in the arc extinguishing device is arranged in the arc extinguishing chamber in a sealing way, and only the heat radiation holes of the arc baffle plate 2 are reserved for discharging the hot air flow in the cavity. When the live working, the part of the hand contacting the arc extinguishing device is an insulator, the creepage distance is enough safe, the insulated shell of the hand contacting the arc extinguishing device is free from electric shock hazard, the whole arc extinguishing device is free from electric arc exposure, zero flashover can be realized, and the moving contact and the fixed contact of the switch mechanism are protected from electric arc ablation.
The device provided by the embodiment of the application can be applied to an outdoor all-insulation arc extinguishing system, and the arc extinguishing device can be arranged in an isolating switch and is used for eliminating an arc generated by an arc contact. In order to ensure the capacity of a switching circuit of the switch, the isolating switch requires that an electric arc is not generated when a moving contact and a fixed contact on a main circuit of the circuit are switched on and off, so that the contact of the main circuit of the circuit is not ablated; the arc extinguishing device provided by the embodiment of the application is adopted to open the circuit finally when the circuit is optionally arranged to be disconnected, and the arc extinguishing device provided by the embodiment of the application is adopted to close the circuit firstly when the circuit is closed, so that an arc is generated and extinguished by the arc extinguishing device, an arc ablation contact is not generated on a main circuit contact of the circuit, the arc is produced and absorbed by the arc extinguishing device, and the function and performance of the original product can be reserved to the maximum extent by the arc extinguishing device provided by the embodiment of the application, and the service life of the product is ensured not to be influenced by the arc.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. An arc extinguishing device, characterized by comprising:
a housing having a cavity formed therein; an exhaust opening and a movable arc contact inlet are formed in the shell; the static arc contact is arranged in the cavity, and the moving arc contact is contacted with the static arc contact after entering the cavity from the moving arc contact inlet;
the gas generating piece is arranged at one side of the moving path of the moving arc contact in the cavity;
the air passage is formed in the cavity, an air inlet of the air passage faces the air generating piece, and an air outlet of the air passage faces the air exhaust opening;
the grid plate assembly is arranged in the air passage;
the arc baffle is arranged between the exhaust opening and the air outlet of the air flue, and a heat radiation hole is formed in the arc baffle.
2. The arc extinguishing device according to claim 1, wherein the exhaust opening is provided at the top of the housing; the cavity is divided into a first mounting cavity and a second mounting cavity from bottom to top; the static arc contact and the gas generating piece are arranged in the first mounting cavity, and the first mounting cavity also accommodates a movement path of the moving arc contact in the cavity; the arc baffle is arranged in the second installation cavity.
3. The arc extinguishing device according to claim 1, wherein the gas generating member includes a first surface that faces the moving arc contact after the moving arc contact enters the cavity, a minimum distance between the moving arc contact and the first surface during movement of the moving arc contact is a first distance, an arc generated by the moving arc contact and the static arc contact within the first distance can excite the gas generating member to discharge gas, and the first distance is not smaller than a failure distance of the gas generating member.
4. An arc suppressing apparatus according to claim 3, wherein the first distance is between 4mm and 10 mm.
5. The arc suppressing apparatus according to claim 3, wherein the first surface is a rugged surface.
6. The arc extinguishing device according to claim 1, wherein the grid assembly comprises a plurality of arc extinguishing grid plates which are arranged in parallel, a notch is arranged on one side of each arc extinguishing grid plate, the notches of the plurality of arc extinguishing grid plates form an arc extinguishing channel, and the arc extinguishing channel is arranged on a moving path of the moving arc contact in the cavity.
7. The arc extinguishing device according to claim 6, wherein the arc extinguishing device is arranged in a switch mechanism, the switch mechanism comprises a moving blade and a static blade, the static blade is provided with a static main contact and a static arc contact, the moving blade is provided with a moving main contact and a moving arc contact, and the moving main contact and the moving arc contact on the moving blade are respectively connected with or separated from the static main contact and the static arc contact on the static blade by moving the moving blade;
and among the arc extinguishing grid sheets which are arranged in parallel, the arc extinguishing grid sheet closest to the static arc contact is connected with the static arc contact or the static main contact, and the thickness of the arc extinguishing grid sheet is thicker than that of all the rest arc extinguishing grid sheets.
8. The arc extinguishing device according to claim 1, wherein the grid assembly comprises a plurality of arc extinguishing grid plates arranged in parallel, the plurality of arc extinguishing grid plates are arranged beside a block movement path of the moving arc contact in the cavity and cover the whole movement path of the moving arc contact in the cavity;
when the movable arc contact moves in the cavity, the distance between each arc extinguishing gate sheet and the movable arc contact is not lower than a set distance.
9. The arc suppressing apparatus according to any one of claims 6 to 8, wherein the plurality of arc suppressing gate sheets are arranged in parallel at equal intervals.
10. The arc extinguishing device according to claim 1, wherein the arc extinguishing device comprises at least two arc baffles arranged in parallel, the heat dissipation holes on the at least two arc baffles are arranged in a staggered manner, and the shortest distance between the arc baffle closest to the grid assembly and the grid assembly is not less than 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311087080.4A CN117079998A (en) | 2023-08-28 | 2023-08-28 | Arc extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311087080.4A CN117079998A (en) | 2023-08-28 | 2023-08-28 | Arc extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117079998A true CN117079998A (en) | 2023-11-17 |
Family
ID=88711346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311087080.4A Pending CN117079998A (en) | 2023-08-28 | 2023-08-28 | Arc extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117079998A (en) |
-
2023
- 2023-08-28 CN CN202311087080.4A patent/CN117079998A/en active Pending
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