CN201256114Y - Vacuum additron - Google Patents
Vacuum additron Download PDFInfo
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- CN201256114Y CN201256114Y CNU2008201228439U CN200820122843U CN201256114Y CN 201256114 Y CN201256114 Y CN 201256114Y CN U2008201228439 U CNU2008201228439 U CN U2008201228439U CN 200820122843 U CN200820122843 U CN 200820122843U CN 201256114 Y CN201256114 Y CN 201256114Y
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- vacuum switch
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model relates to a vacuum switch tube, comprising a first contact and a second contact which are respectively arranged on conducting rods, the two contacts are sealed in a vacuum tube body and are arranged oppositely, the two contacts are cylinders and respectively comprise a conducting component and a magnetic conducting component which extend along an identical direction and are in mutually adjacent connection, shapes of the cross sections of the magnetic conducting components and the conducting components of the first contact and the second contact are in positive-and-negative entangled engagement, the magnetic conducting component of the first contact is arranged correspondingly to the conducting component of the second contact, and the conducting component of the first contact is arranged correspondingly to the magnetic conducting component of the second contact. Two vacuum switch contacts of the utility model are arranged anti-symmetrically, thereby enabling a rotating magnetic field with rotary magnetic lines to be formed between the two vacuum switch contacts, wherein the rotating magnetic field not only includes a horizontal magnetic field but a perpendicular magnetic field. The utility model effectively reduces restrike possibility when electric voltage is broken, reduces electric arc voltage, realizes effective arc extinction, and meets requirements of high voltage breaking.
Description
Technical field
The utility model relates to a kind of vacuum switch tube, relates in particular to the vacuum switch tube that is provided with relative contact in a kind of arc control device, belongs to technical field of electricity.
Background technology
Switchgear is the equipment that must use in the circuit, and it plays a part to close closes, cut-offs circuit.Two contacts in the switchgear can produce electric arc in breaking course, producing arc column from the cathode protection burning is the plasma arc of the conical surface.Especially in high-tension circuit, the electric arc that produces between switch contact is especially strong.
Electric arc can make the temperature of switch raise and the loss switch, and the existence of electric arc can reduce the electric current breaking capacity of contact.Therefore must carry out arc extinguishing in the switching process of switch contact.Use mostly in the present switchgear and carry out arc extinguishing, its corresponding characteristics difference of different arc-extinguishing mediums such as media such as oil, sulphur hexafluoride, air, semiconductor or vacuum.Because vacuum switch has less contact gap, higher proof voltage ability, lower arc voltage, higher breaking current ability, lower electrical wear and higher electric life, therefore is widely used in the power circuit.
Existing vacuum switch tube generally comprises two contacts that are enclosed in the vaccum case, is provided with in the contact body of two contacts in abutting connection with the magnetic conductive part and the conductive component of combination.When breaking current, two contact pitch are from increasing gradually, contact area between contact body reduces gradually, have only a contact point up between contact body, contact resistance increases gradually simultaneously, so the temperature of contact point region raises gradually, the fusing point that is higher than contact point up to temperature, contact point fusing and evaporation ionization, metallic vapour makes the discharge in the vacuum be maintained, and produces vacuum arc.At this moment, after the key of breaking current success was the arc current zero passage, contact body gap insulation resume speed was faster than the transient recovery voltage speed between the contact body gap, hit pay dirk with regard to not restriking and cut-off.During the vacuum interrupter drop-out current, the rapid diffusion of the metallic vapour that electric arc is emitted meeting when the arc current zero passage runs into contact body or can condense immediately in the radome surface.Therefore, the metallic vapour density that produces when needing the corresponding contact body size of appropriate design drop-out current, material, form, contact body gap and electric current to cut-off, influencing factors such as charged particle densities.
Generally speaking, between contact body, rely on magnetic conductive part to form good longitudinal magnetic field and can reach the effect of quickening extinguishing arc, insulation recovery characteristic behind the very good arc is arranged.But present contacts of vacuum switch is because the restriction of planform often is difficult to form good longitudinal magnetic field and carries out extinguishing arc, and the electric field that is occurred when being difficult to solve the high pressure disjunction is concentrated, the withstand voltage not enough and problems such as possibility is big of restriking.Disjunction for high-tension circuit, prior art can realize the disjunction of 36 kilovoltages, for higher potential circuit, especially 72 kilovolts high pressure, the requirement of effective arc extinguishing when also not existing a kind of vacuum switch tubular construction to satisfy disjunction at present, this is in the existing vacuum switch technology one of problem to be solved to be arranged.
The utility model content
The purpose of this utility model provides a kind of vacuum switch tube, and the possibility of restriking during with the disjunction of reduction voltage reduces arc voltage, realizes effective arc extinguishing, satisfies the requirement of high pressure disjunction.
For achieving the above object, the utility model provides a kind of vacuum switch tube, comprise first conducting rod and second conducting rod, described first conducting rod, one end is provided with first contact, described second conducting rod, one end is provided with second contact, described first contact and described second contact are enclosed in the vacuum body and are oppositely arranged, and wherein: described first contact and described second contact are cylinder; First contact and second contact comprise along the equidirectional extension respectively and adjoin each other forms the conductive component and the magnetic conductive part of contact body; Conductive component and magnetic conductive part are shaped as the female and male fish cooperation in the contact body of described first contact and second contact, the cross section that is contact body is divided into top left region, zone, lower-left, right regions and lower right area by self longitudinal midline and transversal centerline, and described right regions is divided into second right regions beyond first right regions of top left region and first right regions; Zone, described lower-left is divided in abutting connection with the zone, first lower-left of lower right area and the zone, second lower-left beyond the zone, first lower-left, described first right regions and zone, described first lower-left equal the semicircle of described contact body cross section radius for diameter, and described first right regions semicircular diameter limit and described top left region adjacency, semicircular diameter limit, zone, described first lower-left and described lower right area adjacency, described conductive component is arranged on described first right regions, in top left region and the zone, second lower-left, described magnetic conductive part is arranged on zone, described first lower-left, in the lower right area and second right regions; The corresponding setting of conductive component of the magnetic conductive part of described first contact and described second contact, the corresponding setting of magnetic conductive part of the conductive component of described first contact and described second contact.
Wherein, the contact body of described first contact and described second contact can be made up of folded successively the establishing of several lamellar bodies respectively, each lamellar body is constituted by conducting strip and magnetic conduction sheet adjacency, and several conducting strips are formed described conductive component, and several magnetic conduction sheets are formed described magnetic conductive part; The contact body of described first contact and described second contact is arranged at respectively among the cylindrical metal housing.
Further, also offer the fixing hole that runs through each lamellar body on described conducting strip and the magnetic conduction sheet, be inserted with fixed leg in the described fixing hole, an end of described fixed leg is fixed in the bottom of described metal shell inboard.
The utility model provides a kind of vacuum switch tube, conductive component and the magnetic conductive part of forming the contact body of two contacts are the fit shapes of female and male fish, therefore it is strong to form an end magnetic field intensity, the non-uniform magnetic field that one end magnetic field intensity is weak, and, the magnetic conductive part antisymmetry of two contacts of vacuum switch is provided with, when making the magnetic field formation field circuit that the magnetic conductive part of magnetic field that the magnetic conductive part of a contacts of vacuum switch forms and another contacts of vacuum switch forms, between two contacts of vacuum switch, form existing horizontal magnetic field, there are the vertical magnetic field and the magnetic line of force to be the rotating magnetic field of rotating shape again, the possibility of restriking when effectively reducing the voltage disjunction, reduced arc voltage, realize effective arc extinguishing, can satisfy the requirement of high pressure disjunction.
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Description of drawings
Fig. 1 is the structural representation of the utility model vacuum switch tube specific embodiment one;
Fig. 2 is the cross-sectional structure schematic diagram of contact body in the utility model vacuum switch tube specific embodiment one;
Fig. 3 is the side-looking structural representation of contact body in the utility model vacuum switch tube specific embodiment two;
Fig. 4 is the cross-sectional structure schematic diagram of contact body in the utility model vacuum switch tube specific embodiment three.
Embodiment
Vacuum switch tube of the present utility model comprises first conducting rod and second conducting rod, first conducting rod, one end is provided with first contact, second conducting rod, one end is provided with second contact, first contact and second contact are enclosed in the vacuum body and are oppositely arranged, and first contact and second contact are cylinder; First contact and second contact comprise along the equidirectional extension respectively and adjoin each other forms the conductive component and the magnetic conductive part of contact body; Conductive component and magnetic conductive part are shaped as the female and male fish cooperation in the contact body; First contact and second contact are the antisymmetry setting, i.e. the conductive component setting of corresponding second contact of the magnetic conduction portion of first contact, and the magnetic conduction portion of corresponding second contact of the conductive component of first contact is provided with.Introduce the structure of the utility model vacuum switch tube in detail below by specific embodiment.
Vacuum switch tube embodiment one
Be illustrated in figure 1 as the structural representation of the utility model vacuum switch tube specific embodiment one.This vacuum switch tube has an insulation crust 103, i.e. vacuum body.Be respectively arranged with upper end cover 102 and bottom end cover 109 at insulation crust 103 upper/lower terminals, in insulation crust 103, be provided with two conducting rods, be respectively first conducting rod 1011 and second conducting rod 101.One end of first conducting rod 1011 is provided with first contact 106, first conducting rod 1011 is located among the through hole of bottom end cover 109 by fairlead 1010 slips, fairlead 1010 is fixedly installed in the through hole of bottom end cover 109, and on fairlead 1010, be provided with through hole and slide for first conducting rod 1011 and wear, also being arranged with bellows 108, the first conducting rods 1011 outside first conducting rod 1011 is connected on the fairlead 1010 by bellows 108.One end of second conducting rod 101 is provided with second contact, 105, the second conducting rods 101 and is fixed on the upper end cover 102, and is connected by screw on the switch framework of vacuum switch, keeps static.First contact 106 and second contact 105 are oppositely arranged.Outside second contact 105 and first contact 106, also be provided with intershield cover 104, be provided with the bellows shield cover between bellows 108 and the intershield cover 104, bellows 108 is because of its scalability, so the sealing of vacuum switch tube can guarantee 1011 motions of first guide post time.
The vacuum switch tube of said structure by the motion of first conducting rod, is realized deciliter state of second contact and first contact, when needs are connected circuit, first conducting rod moves towards second contact along the axis of vacuum switch tube, and the second last contact contacts with first contact, and circuit is connected; When the needs open circuit, towards moving away from the direction of second contact, second contact separates with first contact first conducting rod, thereby reaches the purpose of open circuit electric current along the axis of vacuum switch tube.
In the present embodiment, first contact and second contact are cylinder, and are respectively arranged with are-tight layer on its surface that is oppositely arranged.Specifically, conductive component in two contacts and magnetic conductive part shape are the female and male fish cooperation.When being oppositely arranged, the conductive component setting of corresponding second contact of the magnetic conductive part of first contact, the magnetic conductive part setting of corresponding second contact of the conductive component of first contact, promptly first contact and second contact are the antisymmetry setting.
The female and male fish shape of cross section can be identical in the contact body of first contact and second contact, is example with first contact, Figure 2 shows that the cross-sectional structure schematic diagram of contact body in the utility model vacuum switch tube specific embodiment one.As shown in Figure 2, the shape of cross section of contact body is circular, and any one cross section is divided into top left region 10, zone, lower-left 20, right regions 30 and lower right area 40 by self longitudinal midline Y and transversal centerline X.Right regions 30 is divided into second right regions 32 that forms with exterior domain in abutting connection with first right regions 31 of top left region 10 and first right regions 31.This zone, lower-left 20 is divided into the zone, second lower-left 22 that forms with exterior domain in abutting connection with the zone 21,21 and first lower-left, zone, first lower-left of lower right area 40.This first right regions 31, top left region 10 and zone, second lower-left 22 are provided with electric conducting material and form conductive component, for example copper metal.This zone, first lower-left 21, lower right area 40 and second right regions 32 are provided with permeability magnetic material and form magnetic conductive part, for example ferrous metal.
In the present embodiment, first right regions 31 and zone, first lower-left 21 are semicircle, and first right regions, 31 semicircular diameter limits and top left region 10 adjacency, 21 semicircular diameter limits, zone, first lower-left and lower right area 40 adjacency, the diameter length of two semicircles is equal to the radius length of place contact body cross section, concrete shape as shown in Figure 2, then conductive component and magnetic conductive part have formed the female and male fish shape that adjoins each other and cooperate.The contact body conductive component of present embodiment female and male fish shape and the layout designs of magnetic conductive part can promote the formation of contact surface rotation magnetic force line, help to improve the high-tension ability of vacuum switch tube disjunction.
In the process of vacuum switch tube work, when aliving, magnetic conductive part can produce the magnetic line of force in conductive component, and the distribution trend of the magnetic line of force is to flow into the less end of female and male fish from the bigger end of female and male fish.When using this vacuum switch tube, two contact body antisymmetry with spline structure are provided with, the position opposite of magnetic conductive part, distance between two contact body is less than a half of contact body section girth, then from bigger end flow into than the magnetic line of force of small end will change into the magnetic conductive part that flows into another contact body than small end, thus, between the contact surface of two relative contact body, just can form the magnetic line of force of rotation.This scheme based on principle be that the magnetic line of force is always selected the shortest path profile.
In the present embodiment, because the structural design of magnetic conductive part makes the magnetic line of force have the trend that flows into another contact body from turning to around the contact body periphery, can between two contact body, form existing horizontal magnetic field, again the rotating magnetic field of longitudinal magnetic field be arranged, and, in the switch disjunction, when the distance between two contact body increased gradually, longitudinal magnetic field still can be maintained.Thereby, adopt the vacuum switch tube of said structure design, the longitudinal magnetic field of effective arc extinguishing can be provided, the raising of arc extinguishing ability, the possibility of restriking when helping reducing the voltage disjunction reduces arc voltage, thereby can satisfy the requirement of high pressure disjunction, the technical scheme of present embodiment can reach the ability of disjunction voltage more than 40.5 kilovolts, for example voltage such as 55 kilovolts, 72.5 kilovolts of disjunctions and 110 kilovolts.
In the present embodiment, because the magnetic resistance of contact body inside is much smaller than the magnetic resistance of vacuum environment, so promptly can realize forming the condition of longitudinal magnetic field less than section girth one half on the two contact body facing surfaces when distance between contact body.Two contact body relatively can be from the contact body internal delivery on two contact body facing surfaces than the magnetic line of force of far-end.
Vacuum switch tube embodiment two
Be illustrated in figure 3 as the side-looking structural representation of contact body in the utility model vacuum switch tube specific embodiment two.In the present embodiment, the contact body of first contact and second contact is by the folded successively composition of establishing of several lamellar bodies, with first contact is example, each lamellar body is constituted by conducting strip and magnetic conduction sheet adjacency, several conducting strips are formed conductive component, several magnetic conduction sheets are formed magnetic conductive part, the structural relation of the shape of cross section of conducting strip and magnetic conduction sheet and conductive component wherein and magnetic conductive part can adopt the technical scheme in the foregoing description, for female and male fish cooperates, all lamellar bodies are folded to be located at the outer contour shape that constitutes contact body together, as shown in Figure 3.One columniform metal shell also is set respectively outside the contact body of first contact and second contact, makes contact be installed in this metal shell so that consist of vacuum switch tube.
Vacuum switch tube embodiment three
Be illustrated in figure 4 as the cross-sectional structure schematic diagram of contact body in the utility model vacuum switch tube specific embodiment three.On the basis of the foregoing description two, for making lamellar body before fusing is solidified, the relative position of conductive component and magnetic conductive part is fixed, can also further on conducting strip 300 and magnetic conduction sheet 400, offer the fixing hole 200 that runs through several lamellar bodies, be inserted with fixed leg 100 in the fixing hole 200, as shown in Figure 4, and an end of fixed leg 100 be fixed in the bottom of metal shell inboard.The material of fixed leg 100 can be identical with the conductive component material, for example the copper metal.
The technical scheme of present embodiment can be simplified the manufacturing of contact body, prepare a plurality of lamellar bodies with easy moulding process after, lamellar body can be put into the metal shell of a corresponding conductive component and magnetic conductive part profile.Can feed big electric current generation heat and heat, make metal molten in the lamellar body, form conductive component and magnetic conductive part respectively after cooling is solidified.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (3)
1, a kind of vacuum switch tube, comprise first conducting rod and second conducting rod, described first conducting rod, one end is provided with first contact, described second conducting rod, one end is provided with second contact, described first contact and described second contact are enclosed in the vacuum body and are oppositely arranged, and it is characterized in that: described first contact and described second contact are cylinder; First contact and second contact comprise along the equidirectional extension respectively and adjoin each other forms the conductive component and the magnetic conductive part of contact body; Conductive component and magnetic conductive part are shaped as the female and male fish cooperation in the contact body of described first contact and second contact, the cross section that is contact body is divided into top left region, zone, lower-left, right regions and lower right area by self longitudinal midline and transversal centerline, and described right regions is divided into second right regions beyond first right regions of top left region and first right regions; Zone, described lower-left is divided in abutting connection with the zone, first lower-left of lower right area and the zone, second lower-left beyond the zone, first lower-left, described first right regions and zone, described first lower-left equal the semicircle of described contact body cross section radius for diameter, and described first right regions semicircular diameter limit and described top left region adjacency, semicircular diameter limit, zone, described first lower-left and described lower right area adjacency, described conductive component is arranged on described first right regions, in top left region and the zone, second lower-left, described magnetic conductive part is arranged on zone, described first lower-left, in the lower right area and second right regions; The corresponding setting of conductive component of the magnetic conductive part of described first contact and described second contact, the corresponding setting of magnetic conductive part of the conductive component of described first contact and described second contact.
2, vacuum switch tube according to claim 1, it is characterized in that: the contact body of described first contact and described second contact is made up of folded successively the establishing of several lamellar bodies respectively, each lamellar body is constituted by conducting strip and magnetic conduction sheet adjacency, several conducting strips are formed described conductive component, and several magnetic conduction sheets are formed described magnetic conductive part; The contact body of described first contact and described second contact is arranged at respectively among the cylindrical metal housing.
3, vacuum switch tube according to claim 2, it is characterized in that: offer the fixing hole that runs through each lamellar body on described conducting strip and the magnetic conduction sheet, be inserted with fixed leg in the described fixing hole, an end of described fixed leg is fixed in the bottom of described metal shell inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201228439U CN201256114Y (en) | 2008-09-28 | 2008-09-28 | Vacuum additron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201228439U CN201256114Y (en) | 2008-09-28 | 2008-09-28 | Vacuum additron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201256114Y true CN201256114Y (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201228439U Expired - Fee Related CN201256114Y (en) | 2008-09-28 | 2008-09-28 | Vacuum additron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201256114Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101359553B (en) * | 2008-09-28 | 2012-01-11 | 北京京东方真空电器有限责任公司 | Vacuum switch tube |
-
2008
- 2008-09-28 CN CNU2008201228439U patent/CN201256114Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101359553B (en) * | 2008-09-28 | 2012-01-11 | 北京京东方真空电器有限责任公司 | Vacuum switch tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |