CN101359553B - Vacuum switch tube - Google Patents
Vacuum switch tube Download PDFInfo
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- CN101359553B CN101359553B CN2008102238199A CN200810223819A CN101359553B CN 101359553 B CN101359553 B CN 101359553B CN 2008102238199 A CN2008102238199 A CN 2008102238199A CN 200810223819 A CN200810223819 A CN 200810223819A CN 101359553 B CN101359553 B CN 101359553B
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Abstract
The invention relates to a vacuum switch tube, comprising a first contact and a second contact which are respectively arranged on an electric conduction tube. The two contacts are cylindrical bodies and are sealed in a vacuum tube, face to face with each other. Each contact is composed of an electric conduction assembly and a magnetic conduction assembly, which extend along the same direction and are in abuttal joint with one another, making up the main body of the contact. The cross sections of the magnetic conduction assemblies and the electric conduction assemblies of first and second contacts are matched like Yin-Yang fish in shape. The magnetic conduction assembly of the first contact is arranged corresponding to the electric conduction assembly of the second contact, and the electric conduction assembly of the first contact is arranged corresponding to the magnetic conduction assembly of the second contact. The two contacts of the vacuum switch are anti-symmetrically arranged, therefore revolving magnetic fields, including a horizontal magnetic field and a vertical magnetic field with revolving magnetic lines of force, are formed between the two contacts of the vacuum switch, thus effectively reducing restrike possibility at the time of voltage disjunction and realizing arc extinguishing. The vacuum switch tube can satisfy the requirement of high voltage disjunction.
Description
Technical field
The present invention relates to a kind of vacuum switch tube, relate in particular to the vacuum switch tube that is provided with relative contact in a kind of arc control device, belong 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 such as media such as oil, sulphur hexafluoride, air, semiconductor or vacuum, its corresponding characteristics of different arc-extinguishing mediums are different.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 increase gradually, and the contact area between contact body reduces gradually; Up between contact body, have only a contact point, 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 successful key of breaking current 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.
Summary of the invention
The purpose of this invention is to provide a kind of vacuum switch tube, 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 realizing above-mentioned purpose; The invention provides a kind of vacuum switch tube; Comprise first conducting rod and second conducting rod, said first conducting rod, one end is provided with first contact, and said second conducting rod, one end is provided with second contact; Said first contact and said second contact are enclosed in the vacuum body and are oppositely arranged, and wherein: said first contact and said 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 said first contact and second contact; The cross section that is contact body is divided into top left region, left lower area, right regions and lower right area by self longitudinal midline and transversal centerline, and said right regions is divided in abutting connection with second right regions beyond first right regions of top left region and first right regions; Said left lower area is divided in abutting connection with the second left lower area beyond the first left lower area of lower right area and the first left lower area; Said first right regions and the said first left lower area are the semicircle that diameter equals said contact body cross section radius; And said first right regions semicircular diameter limit and said top left region adjacency; The said first left lower area semicircular diameter limit and said lower right area adjacency; Said conductive component is arranged in said first right regions, top left region and the second left lower area, and said magnetic conductive part is arranged in the said first left lower area, lower right area and second right regions; The corresponding setting of conductive component of the magnetic conductive part of said first contact and said second contact, the corresponding setting of magnetic conductive part of the conductive component of said first contact and said second contact.
Wherein, The contact body of said first contact and said 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 said conductive component, and several magnetic conduction sheets are formed said magnetic conductive part; The contact body of said first contact and said second contact is arranged at respectively among the cylindrical metal housing.
Further, also offer the fixing hole that runs through each lamellar body on said conducting strip and the magnetic conduction sheet, be inserted with fixed leg in the said fixing hole, an end of said fixed leg is fixed in the inboard bottom of said metal shell.
The invention 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 can form the non-uniform magnetic field that an end magnetic field intensity is strong, an 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, have 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 has reduced arc voltage; Realize effective arc extinguishing, can satisfy the requirement of high pressure disjunction.
Below through specific embodiment and combine accompanying drawing that the present invention is done further detailed description.
Description of drawings
Fig. 1 is the structural representation of vacuum switch tube specific embodiment one of the present invention;
Fig. 2 is the cross-sectional structure sketch map of contact body in the vacuum switch tube specific embodiment one of the present invention;
Fig. 3 is the side-looking structural representation of contact body in the vacuum switch tube specific embodiment two of the present invention;
Fig. 4 is the cross-sectional structure sketch map of contact body in the vacuum switch tube specific embodiment three of the present invention.
Embodiment
Vacuum switch tube of the present invention 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, and 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 vacuum switch tube of the present invention below in detail through specific embodiment.
Vacuum switch tube embodiment one
Be illustrated in figure 1 as the structural representation of vacuum switch tube specific embodiment one of the present invention.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 through 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 supply first conducting rod 1011 to slide to wear, outside first conducting rod 1011, also be arranged with bellows 108, the first conducting rods 1011 and be connected on the fairlead 1010 through 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 on the switch framework of vacuum switch through screw, 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 through 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, the cross-sectional structure sketch map for contact body in the vacuum switch tube specific embodiment one of the present invention shown in Figure 2.As shown in Figure 2, the shape of cross section of contact body is circular, and any cross section is divided into top left region 10, left lower area 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 left side lower area 20 is divided into the second left lower area 22 that forms with exterior domain in abutting connection with the first left lower area 21 of lower right area 40 and the first left lower area 21.This first right regions 31, top left region 10 and the second left lower area 22 are provided with electric conducting material and form conductive component, for example copper metal.This first left lower area 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 the first left lower area 21 are semicircle; And first right regions, 31 semicircular diameter limits and top left region 10 adjacency, first left lower area 21 semicircular diameter limits and lower right area 40 adjacency, two semicircle diameter lengths are equal to the radius length of place contact body cross section; Concrete shape is as shown in Figure 2, and 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; Distance between the position opposite of magnetic conductive part, 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 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 inner magnetic resistance of contact body 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 vacuum switch tube specific embodiment two of the present invention.In the present embodiment; The contact body of first contact and second contact is established composition by several lamellar bodies are folded successively, is example with first contact, and 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, and the shape of cross section of conducting strip and magnetic conduction sheet and conductive component wherein and the structural relation of 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 sketch map of contact body in the vacuum switch tube specific embodiment three of the present invention.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, and can also further on conducting strip 300 and magnetic conduction sheet 400, offer the fixing hole 200 that runs through several lamellar bodies, is inserted with fixed leg 100 in the fixing hole 200; As shown in Figure 4, and an end of fixed leg 100 is fixed in the inboard bottom of metal shell.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, can lamellar body 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.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, 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 are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (3)
1. vacuum switch tube; Comprise first conducting rod and second conducting rod; Said first conducting rod, one end is provided with first contact; Said second conducting rod, one end is provided with second contact, and said first contact and said second contact are enclosed in the vacuum body and are oppositely arranged, and it is characterized in that: said first contact and said 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 said first contact and second contact; The cross section that is contact body is divided into top left region, left lower area, right regions and lower right area by self longitudinal midline and transversal centerline, and said right regions is divided in abutting connection with second right regions beyond first right regions of top left region and first right regions; Said left lower area is divided in abutting connection with the second left lower area beyond the first left lower area of lower right area and the first left lower area; Said first right regions and the said first left lower area are the semicircle that diameter equals said contact body cross section radius; And said first right regions semicircular diameter limit and said top left region adjacency; The said first left lower area semicircular diameter limit and said lower right area adjacency; Said conductive component is arranged in said first right regions, top left region and the second left lower area, and said magnetic conductive part is arranged in the said first left lower area, lower right area and second right regions; The corresponding setting of conductive component of the magnetic conductive part of said first contact and said second contact, the corresponding setting of magnetic conductive part of the conductive component of said first contact and said second contact.
2. vacuum switch tube according to claim 1; It is characterized in that: the contact body of said first contact and said 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 said conductive component, and several magnetic conduction sheets are formed said magnetic conductive part; The contact body of said first contact and said 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 said conducting strip and the magnetic conduction sheet; Be inserted with fixed leg in the said fixing hole, an end of said fixed leg is fixed in the inboard bottom of said metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102238199A CN101359553B (en) | 2008-09-28 | 2008-09-28 | Vacuum switch tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102238199A CN101359553B (en) | 2008-09-28 | 2008-09-28 | Vacuum switch tube |
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| Publication Number | Publication Date |
|---|---|
| CN101359553A CN101359553A (en) | 2009-02-04 |
| CN101359553B true CN101359553B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102238199A Active CN101359553B (en) | 2008-09-28 | 2008-09-28 | Vacuum switch tube |
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| CN (1) | CN101359553B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177781A1 (en) * | 2012-05-31 | 2013-12-05 | 武汉大学 | High-voltage vacuum switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086933A (en) * | 2007-07-17 | 2007-12-12 | 北京京东方真空电器有限责任公司 | Vacuum switch tube contact and vacuum switch tube |
| CN200993927Y (en) * | 2006-11-16 | 2007-12-19 | 中国振华（集团）科技股份有限公司宇光分公司 | Contact for vacuum arc extinguishing chamber |
| CN201256114Y (en) * | 2008-09-28 | 2009-06-10 | 北京京东方真空电器有限责任公司 | Vacuum additron |
-
2008
- 2008-09-28 CN CN2008102238199A patent/CN101359553B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993927Y (en) * | 2006-11-16 | 2007-12-19 | 中国振华（集团）科技股份有限公司宇光分公司 | Contact for vacuum arc extinguishing chamber |
| CN101086933A (en) * | 2007-07-17 | 2007-12-12 | 北京京东方真空电器有限责任公司 | Vacuum switch tube contact and vacuum switch tube |
| CN201256114Y (en) * | 2008-09-28 | 2009-06-10 | 北京京东方真空电器有限责任公司 | Vacuum additron |
Non-Patent Citations (1)
| Title |
|---|
| JP昭60-157122A 1985.08.17 |
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| CN101359553A (en) | 2009-02-04 |
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