CN100390918C - Contacts of vacuum switch - Google Patents
Contacts of vacuum switch Download PDFInfo
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- CN100390918C CN100390918C CNB2005100039869A CN200510003986A CN100390918C CN 100390918 C CN100390918 C CN 100390918C CN B2005100039869 A CNB2005100039869 A CN B2005100039869A CN 200510003986 A CN200510003986 A CN 200510003986A CN 100390918 C CN100390918 C CN 100390918C
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Abstract
The present invention relates to a vacuum switch contact head which comprises a shell, electric conduction bottom layers, magnetism generating components, arc resistant layers, penetrating sinuses and electric conduction components, wherein the electric conduction bottom layers are distributed in the shell; the magnetism generating components are distributed on the electric conduction bottom layers; the arc resistant layers are distributed on the magnetism generating components; the penetrating sinuses are arranged from one side of each of the magnetism generating components to the inner parts of the magnetism generating components from top to bottom; the electric conduction components are inserted in the sinuses; one end of each of the electric conduction components is abutted on the electric conduction bottom layers, and the other end of each of the electric conduction components is abutted on the arc resistant layers; the electric conductivity of the magnetism generating components is lower than the electric conductivity of the electric conduction bottom layers, the arc resistant layers and the electric conduction components; the shell is made from rigid materials whose melting point is higher than that of each component which is arranged in the shell. Consequently, the integral vacuum switch contact head of the present invention is in the integration direct assembly structure; braze welding connection is not necessary; the vacuum switch contact head changes the structure that each component is separately arranged in the prior art; the magnetic field intensity of the contact head is large; the heat-conducting property of the contact head is good; the contact head has great capacity of breaking current and long service life; the longitudinal magnetic fields of the contact head are uniformly distributed on the surface of the contact head, which is suitable for large capacity switches and has greater breaking capacity.
Description
Technical field
The present invention relates to a kind of contacts of vacuum switch, especially a kind of contact surface can produce multipole longitudinal magnetic field, be more suitable for cut-offfing the interior contacts of vacuum switch of vacuum switch tube arc control device of high current capacity.
Background technology
Switchgear is a kind of equipment that must use in the circuit, and it plays a part to close closes, cut-offs circuit.Under switch off state, switchgear has very high resistance, so that bear certain voltage; Close under the state in the switch pass, switchgear should have very low resistance, allows rated current to pass through, and does not produce too high temperature.Need in the interrupting process of switch contact to carry out arc extinguishing, so that the contact disjunction is resolute.Existing switchgear has different arc-extinguishing mediums: oil, sulphur hexafluoride, air, semiconductor, vacuum etc.The corresponding construction of switch difference of different arc-extinguishing mediums, performance are also different.Because vacuum switch has less clearance, high proof voltage ability, low arc voltage, high breaking current ability, low electrical wear and high electric life, therefore is widely used in the power circuit.But, prior art, as shown in Figure 1, the core component of vacuum switch tube 70 is the vacuum interrupters 60 in the housing 50.The performance of vacuum interrupter 60 inside contact 10,20 directly determines the performance of vacuum switch tube 70.Contacts of vacuum switch 10,20 rear portions of vacuum switch tube 70 connect moving conductive rod 30 and static conductive rod 40 respectively, and the action that contact 10,20 disconnects is to divide open contact 10,20 by controlling moving conductive rod 30 machineries.During disconnection, the contact area of contact 10,20 is more and more littler, up to contact 10,20 contact point is only arranged, contact resistance increases simultaneously, the temperature in zone is increasing, and up to contact point fusing, evaporation and ionization, metal vapors makes the discharge in the vacuum be maintained, produce vacuum arc, finish the electric disconnection of contact at last.In order to improve the rupture capacity of vacuum switch tube, need apply longitudinal magnetic field to vacuum arc, make vacuum arc remain on state stable and diffusion, electric current can comparatively be evenly distributed in contact surface like this, also can reduce simultaneously the temperature rise of contact surface, avoid a large amount of evaporations of contact material, make arc voltage remain on lower level, reduce the electrical wear of contact.Therefore contact must possess the ability in arcing, conduction, generation magnetic field in the vacuum switch tube arc control device, and technical parameter must satisfy that resistance fusion welding is good, compressive resistance is high, the drop-out current ability big, the requirement of aspects such as the arc resistant ablation property is good, shut off value is low, gas content is low, conductance is high and physical dimension is little, reliability height.At present, the concrete structure of contact is made up of arcing parts, conductive component, magnetic field production part substantially.As shown in Figure 2, arcing parts 110 are arranged on the middle part, adopt copper chromium material, and it has big breaking current connecting-disconnecting function and resistance fusion welding preferably, can produce metal vapors in the moment of cut-offfing, so that keep electric current; Conductive component 120 is provided with a circle of contact body, generally adopts copper product; Magnetic field production part 130 is an induction coil, is arranged on the outside of the body of contact, the still vertical magnetic of horizontal magnetic in the time of no matter, and its magnetic field intensity is lower.During these component-assembled, need under vacuum high-temperature, use silver-copper brazing alloy to carry out soldering, just can link together.Because each modular construction complexity, a soldering often can only be finished the part welding, therefore in reality is made, not only need repeatedly to enter high-temperature vacuum furnace and carry out repeatedly soldering, the contact of the face of weld is not to be absolutely to contact yet, be difficult to ensure that the solder side quality closes the fixing of welding, and have burr of the face of weld etc. inevitably, cause the electric energy of contact globality relatively poor.For above-mentioned reasons, the vacuum switch tube of prior art not only rate of finished products is low, and the method complexity causes cost too high, and the piece electrical performance is undesirable.In addition, the processing of each parts needs the various chromiumcopper materials that use specialty configuration moulding, for mechanical car's milling method complexity of this alloy material.
Also have a kind of product in the prior art, by the exploitation of Dutch HOLEC company, its magnetic field production part 130 has been abandoned the coil form of reason.On the copper chromium arcing parts 110 of contact body, stack setting, and utilize rivet 140 riveted joints from level to level as the electrical pure iron sheet 130 of magnetic field production part 130.Iron plate 130 has the opening 1310,1320,1330 of different sizes, produces magnetic field by electrical pure iron sheet induced current, and concrete structure is shown in Fig. 3,4.The stacking of magnetic field production part 130 iron plates on the copper chromium arcing parts 110 forms from big to small trapezoidal shape from the front view direction, so not only simplified the structure of original contact, and magnetic field intensity improves greatly.The method for welding but even such structure also still has to use, the conductive component 120 that separation could be provided with, magnetic field production part 130 iron plates etc. combine.Because the method for the required use of its structure does not have big change substantially, so still there are many problems in its cost, quality.In addition, because production part 130 iron plates in magnetic field are that the plane stacks, according to screw law, magnetic induction makes progress away after arriving the iron plate opening more from level to level, forms the longitudinal flux line of force, and magnetic resistance is bigger.Having, is eccentric body because of stacking of magnetic field production part 130 iron plates is trapezoidal shape, heat carrier again, and this asymmetric heat carrier is inevitable poor in the instantaneous heat dispersion effect, not only influences the breaking capacity of contact, and whole easy deformation.
Of paramount importance is that existing structure of contact terminal is regardless of style, without exception, its each assembly all is to separate to be provided with, and manufacturing process is various, quality shakiness, performance are not high, just,, need a large amount of resolution element of welding for realizing a kind of electric work energy as early stage separate type electronic device, not only operation increases, and reliability is low, and poor-performing must be that volume is bigger simultaneously.Result for retrieval shows widely, and for many years, the continuous development efforts of the technical staff of countries in the world is to be primarily focused on the shape and material of each parts more, in the never bigger improvement of overall structure of contact.
In addition, remove above-mentioned because the complexity of structure and manufacture method, and be with the cost increase except that crossing, the structure of contact terminal of making prior art also causes the wide variety of materials waste, no matter be the leftover pieces under each parts turnning and milling of traditional structure of contact terminal as shown in Figure 2, or shown in Fig. 3,4, improve in the structure the remaining leftover pieces of component processing such as iron plate and can't rationally be used simultaneously, so also must increase the cost of switching tube.
Also having the important point is that the distribution of contact surface longitudinal magnetic field of prior art is very uneven, and extraneous simultaneously stray magnetic field also has tangible influence to the breaking capacity of contact.The contact of especially big capacity switching tube, its longitudinal magnetic field magnetic force more concentrates on the part, must cause contact breaking capacity under big current conditions poor.This drawback has seriously limited the production of high-capacity vacuum switch pipe always.And in the practical application, along with electric power is used more widely, increase rapidly for the demand of high-capacity vacuum switch pipe, for example: the generator unit requires I
BGreater than 120KA, the control of being transported to electric line of 110KVA also needs to adopt vacuum switch tube as break-up device, and therefore existing structure of contact terminal also is unsuitable for the high-capacity vacuum switch pipe.
Summary of the invention
The purpose of this invention is to provide a kind of contacts of vacuum switch, integral body is integrated direct package assembly, does not need to carry out soldering and connects, and changes the structure that each isolation of components is provided with in the prior art.
Another object of the present invention provides a kind of contacts of vacuum switch, and its magnetic field intensity is big, and good heat conductivity has high breaking current capacity and long electric life.
A further object of the present invention provides a kind of contacts of vacuum switch, and the longitudinal magnetic field of its contact is evenly distributed contact surface, is more suitable for having bigger breaking capacity in big capacity switch.
For achieving the above object, the invention provides a kind of contacts of vacuum switch, comprise a housing, this enclosure interior is laid conductive substrate, lays the magnetic production part on this conductive substrate, lays are-tight layer on this magnetic production part; This magnetic production part from a side to inner, offer the perforation notch from top to bottom, plug conductive component in the notch, this conductive component one end conflict conductive substrate, the other end is conflicted are-tight layer, described magnetic production part is lower than the conductance of conductive substrate, are-tight layer and conductive component, and the material of described housing is the rigidity material that fusing point is higher than each parts fusing point that is provided with in it.
The width of described notch is greater than the electromagnetism physical clearance between the two relative contacts.Described conductive substrate and conductive component are formed in one.Described conductive substrate thickness is 1mm-100mm.Described conductive substrate is copper or silver-colored material.The width of described magnetic production part notch is 10% to 90% of a housing width.Described magnetic production part can be the multi-layer cylinder structure of the above different-diameter cylindrical shell of one deck fit, mutually insulated between each layer, and wherein one deck is a layer of soft magnetic material at least.Layer of soft magnetic material in the described multi-layer cylinder is more than one deck.Described multi-layer cylinder is layer of soft magnetic material.Described conductive component is the multi-layer cylinder structure of different-diameter cylindrical shell fit.Described magnetic production part is one or more layers of lamina.Described conductive component is one or more layers of lamina.Described conductive component and magnetic production part make progress from the bottom, and every layer conductive component area occupied reduces gradually, and corresponding magnetic production part increases gradually.Described housing can be cup, and material is the rigidity material that fusing point is higher than inner each parts fusing point.Described are-tight layer is pure copper powder and pure chromium powder mixture.The ratio of described pure copper powder and pure chromium powder mixture is 10: 90 to 90: 10.Described pure copper powder is that-80 orders are to-400 orders; Pure chromium powder is that-80 orders are to-400 orders.Described are-tight layer is silver powder and chromium powder mixture.Described are-tight layer is the sheet material or the bulk of chromiumcopper material.Described are-tight layer is the sheet material or the bulk of silver-colored evanohm material.Described conductive component is copper or silver-colored material.The shape of described conductive component can be powder or sheet material or bar or tubing or bulk or wire rod.Described magnetic production part part be shaped as powder or sheet material or bar or tubing or bulk or wire rod.Described magnetic production part partly or entirely is the soft magnetism material.Described soft magnetism material is the electrical pure iron material.The shape of described soft magnetism material can be powder or sheet material or bar or tubing or bulk or wire rod.The cross section of the notch of described magnetic production part is circle or ellipse or triangle or square or rectangular.The cross section of described conductive component is corresponding circle or ellipse or triangle or the square or rectangular in cross section with the notch of described magnetic production part.The radius of described circular notch is 5% to 45% times of housing width.The length of described oval notch is 10% to 100% of housing width, and width is 0.1-0.9 a times of housing width.The length of described triangle notch is 10% to 100% times of housing width, and width is 10% to 90% times of housing width.The width of described square notch is 10% to 90% times of housing width.The length of described rectangle notch is 10% to 100% times of housing width, and width is 10% to 90% times of housing width.
Therefore, the present invention has the following advantages:
1, contact integral body is integrated direct package assembly, does not need to carry out soldering and connects, and changes the structure that each isolation of components is provided with in the prior art.
2, the magnetic field intensity of contact is big, and good heat conductivity has high breaking current capacity and long electric life.
3, the longitudinal magnetic field of contact is more suitable for having bigger breaking capacity in big capacity switch being evenly distributed of contact surface.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is existing vacuum switch arc control device basic structure schematic diagram.
Fig. 2 is the structural representation of contact in the existing arc control device.
Fig. 3 is the three-dimensional structural scheme of mechanism of another prior art contact.
Fig. 4 is Fig. 3 prior art magnetic field production part planar structure schematic diagram.
Fig. 5 is the sectional structure chart of contacts of vacuum switch preferred embodiment of the present invention.
Fig. 6 is the sectional view of contacts of vacuum switch preferred embodiment of the present invention.
Current diagram when Fig. 7 works for contacts of vacuum switch of the present invention.
Fig. 8 is the magnetic line of force schematic diagram of the are-tight layer of contacts of vacuum switch moving contact of the present invention vertical view.
Fig. 9 is the sectional structure chart of another embodiment of contacts of vacuum switch of the present invention.
Figure 10 is the sectional view of another embodiment of contacts of vacuum switch of the present invention.
Figure 11 is the sectional view of contacts of vacuum switch triangle notch of the present invention.
Figure 12 is the sectional view of contacts of vacuum switch square notch of the present invention.
Figure 13 is the sectional view of contacts of vacuum switch rectangle notch of the present invention.
Embodiment
Main theme of the present invention is each parts of contact that original separation is provided with, and is placed in the container of an outer package, makes contact have integrated overall structure.More specifically conductive component and magnetic production part are cooperatively interacted and be arranged at the bottom of container, are-tight layer is arranged on conductive component and forms on the end face of back formation with the magnetic production part; The magnetic production part has the opening that magnetic circuit disconnects, and the configuration form that conductive component and magnetic production part cooperatively interact can make the surface of contact produce longitudinal magnetic field.Can be cup as the cooperatively interact container of outer package of are-tight layer, conductive component and magnetic production part.The container material is the rigidity material that fusing point is higher than inner each parts fusing point.For example, container can be fusing point and is higher than 1100 ℃ of stainless steels.Because conductive component can be the material of conduction, high magnetic resistance and heat conduction, when adopting fine copper or red copper material, its fusing point is 1083 ℃.Institute thinks that reaching conductive component is in molten condition in high temperature furnace, and the temperature of high temperature furnace should be higher than 1083 ℃, and the fusing point of outer package container just should be higher than 1100 ℃ so, just can satisfy the demand.The magnetic production part partly or entirely is the soft magnetism material.Electrical pure iron material for example.
Just because of the contact outside shell of an overall package is arranged, the form of wherein are-tight layer, magnetic production part and conductive component also just can be forms such as powder or sheet material or bar or tubing or bulk or wire rod.As long as can producing in contact surface, the version of forming have the magnetic line of force to pass in and out magnetic field longitudinally.
Embodiment 1
As shown in Figure 5 and Figure 6, be the generalized section and the schematic cross-section of a preferred embodiment of the present invention, this contacts of vacuum switch comprises a housing 1, this housing is that fusing point is 1100 ℃ a stainless steel, this housing 1 bottom is provided with conductive substrate 2, and this conductive substrate 2 is a copper, and 50mm is thick; Be laid with magnetic production part 5 on this conductive substrate 2, this magnetic production part 5 is coated with insulating barrier 50, and this magnetic production part 5 is a copper material; Lay are-tight layer 6 on this magnetic production part 5, this magnetic production part 5 from a side to inner, offer and connect notch 3 from top to bottom, the width of notch 3 can for the housing width 10% to 90% between, be 40% herein, plug conductive component 4 in the notch 3, these conductive component 4 one end conflict conductive substrates 2, the other end are conflicted are-tight layer 6.Therefore, magnetic production part 5 all insulate with conductive substrate 2, are-tight layer 6 and conductive component 4, and the conductance of magnetic production part 5 is all lower than conductive substrate 2, are-tight layer 6 and conductive component 4.Conductive substrate can also be silver, and thickness is between the 1mm-100mm.
Current diagram when working as shown in Figure 7, for contacts of vacuum switch of the present invention.The direction of arrow is the sense of current among the figure.Have two contacts 8,9 in the vacuum interrupter 700 of vacuum switch 7, the opening of notch 3 is greater than the gap of contact, contacts of vacuum switch 8,9 rear portions of vacuum switch 7 connect moving conductive rod 80 and static conductive rod 90 respectively, and the action that contact 8,9 disconnects is to divide open contact 8,9 by controlling moving conductive rod 80 machineries.During disconnection, the contact area of contact 8,9 is more and more littler, up to contact 1,2 contact point is only arranged, contact resistance increases simultaneously, the temperature in zone is increasing, and up to contact point fusing, evaporation and ionization, metal vapors makes the discharge in the vacuum be maintained, produce vacuum arc, finish the electric disconnection of contact at last.Electric current passes to the conductive substrate 2 of contact 8 along moving conductive rod 80, flow to are-tight layer 6 along conductive component 4 then, then conducts to the are-tight layer 6 of contact 9 along metal vapors, flows away along static conductive rod 90 by conductive component 4 to conductive substrate 2 backs.Electric current conducts to the are-tight layer 6 of contact 9 along metal vapors from the are-tight layer 6 of contact 8, it has cross stream component, therefore, the magnetic field that this electric current produces as shown in Figure 8, promptly produced longitudinal magnetic field, and the magnetic field that magnetic production part 5 is produced also has longitudinal component, magnetic direction is identical with direction shown in Figure 8, produce with aforementioned magnetic field stack and to add high-intensity magnetic field and make vacuum arc remain on state stable and diffusion, electric current can comparatively be evenly distributed in contact surface like this, also can reduce the temperature rise of contact surface simultaneously, avoids a large amount of evaporations of contact material, make arc voltage remain on lower level, reduce the electrical wear of contact.The distance of the notch 3 of magnetic production part 5 can be greater than electromagnetism physical clearance actual between two relative in the switch contacts 8,9.
Are-tight layer 6 is the sheet material or the bulk of the pure evanohm material of fine copper.For further reducing the cost of material, are-tight layer 6 no longer adopts special fine copper, the pure chromium alloy material of producing, and adopt fine copper, pure chromium mixture, can be 10: 90 to 90: 10 according to the ratio of two kinds of materials in the different fine copper of specific requirement, the pure chromium powder mixture.And pure copper powder is that-80 orders are to-400 orders; Pure chromium powder is that-80 orders are to-400 orders.Preferable is pure copper powder-325 order, pure chromium powder-325 order.And pure copper powder can replace with silver powder.
As Fig. 9 and shown in Figure 10, be the profile of another embodiment of contacts of vacuum switch of the present invention, the present embodiment contacts of vacuum switch comprises a housing 1, this housing is that fusing point is 1100 ℃ a stainless steel, this housing 1 bottom is provided with conductive substrate 2, and this conductive substrate 2 is a silver, and 25mm is thick; Be laid with magnetic production part 5 on this conductive substrate 2, magnetic production part 5 is 7 layers of tube structure (referring to shown in Figure 10) of a plurality of different-diameter cylindrical shell 51 fits, each cylindrical shell is soft magnetic material, and soft magnetic material can be powder or sheet material or bar or tubing or bulk or wire rod.Be electrical pure iron herein, be equipped with insulating material 50 between each cylindrical shell, what be provided with and set according to the magnetic field intensity demand of reality of the cylindrical shell number of plies, magnetic field intensity requires high, the cylindrical shell number of plies just should be many, and magnetic field intensity requires low, and the cylindrical shell number of plies just can be lacked.Are-tight layer 6 is laid on these magnetic production part 5 tops, this magnetic production part 5 from a side to inner, offer and connect notch 3 from top to bottom, the width of notch 3 is 30% of a housing width, plugs conductive component 4 in the notch 3, these conductive component 4 one end conflict conductive substrates 2, the other end are conflicted are-tight layer 6.And the magnetic production part also can be stratiform.
In above two embodiment, the form of magnetic production part 5 can be forms such as powder or sheet material or bar or tubing or bulk or wire rod.The notch 3 of magnetic production part can be circle or ellipse or triangle or square or rectangular shapes such as (shown in Figure 11-13), the cross section of corresponding conductive component 4 can be shapes such as circle or ellipse or triangle or square or rectangular, and the radius of circular notch is 5% to 45% times of housing width.The length of oval notch is 10% to 100% times of housing width, and width is 10% to 90% of a housing width.The length of triangle notch is 0.1-1 times of housing width, and width is 10% to 90% times of housing width.The width of square notch is 10% to 90% of a housing.The length of rectangle notch is 10% to 100% times of housing width, and width is 10% to 90% of a housing width.
Therefore, contact integral body of the present invention is integrated direct package assembly, does not need to carry out soldering and connects, and changes the structure that each isolation of components is provided with in the prior art.The magnetic field intensity of contact is big, and good heat conductivity has high breaking current capacity and long electric life.The longitudinal magnetic field of contact is evenly distributed contact surface, is more suitable for having bigger breaking capacity in big capacity switch.During fabrication, magnetic produces the soft magnetic substance and the stratified pieces of material such as powdery and inserts in the housing, gets final product through the high temperature furnace molten sintering.Thereby simplified technology greatly, reduced production cost, improved product quality.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (32)
1. a contacts of vacuum switch is characterized in that: comprise a housing, this enclosure interior laying conductive substrate, laying magnetic production part on this conductive substrate, the are-tight layer of laying on this magnetic production part; This magnetic production part from a side to inner, offer the perforation notch from top to bottom, the width of described magnetic production part notch is 10% to 90% of a housing width, plug conductive component in the notch, this conductive component one end conflict conductive substrate, the other end is conflicted are-tight layer, described magnetic production part is lower than the conductance of conductive substrate, are-tight layer and conductive component, and the material of described housing is the rigidity material that fusing point is higher than each parts fusing point that is provided with in it.
2. contacts of vacuum switch according to claim 1 is characterized in that: the width of described notch is greater than the electromagnetism physical clearance between the two relative contacts.
3. contacts of vacuum switch according to claim 1 and 2 is characterized in that: described conductive substrate and conductive component are formed in one.
4. contacts of vacuum switch according to claim 1 is characterized in that: described conductive substrate thickness is 1mm-100mm.
5. according to claim 1 or 4 described contacts of vacuum switch, it is characterized in that: described conductive substrate is copper or silver-colored material.
6. contacts of vacuum switch according to claim 1 is characterized in that: described magnetic production part can be the multi-layer cylinder structure of the above different-diameter cylindrical shell of one deck fit, mutually insulated between each layer, and wherein one deck is a layer of soft magnetic material at least.
7. contacts of vacuum switch according to claim 6 is characterized in that: the layer of soft magnetic material in the described multi-layer cylinder is more than one deck.
8. contacts of vacuum switch according to claim 6 is characterized in that: described multi-layer cylinder is layer of soft magnetic material.
9. contacts of vacuum switch according to claim 1 is characterized in that: described conductive component is the multi-layer cylinder structure of different-diameter cylindrical shell fit.
10. contacts of vacuum switch according to claim 1 is characterized in that: described magnetic production part is one or more layers of lamina.
11. contacts of vacuum switch according to claim 10 is characterized in that: described conductive component is one or more layers of lamina.
12. contacts of vacuum switch according to claim 11 is characterized in that: described conductive component and magnetic production part make progress from the bottom, and every layer conductive component area occupied reduces gradually, and corresponding magnetic production part increases gradually.
13. contacts of vacuum switch according to claim 1 is characterized in that: described housing is a cup, and material is the rigidity material that fusing point is higher than inner each parts fusing point.
14. contacts of vacuum switch according to claim 1 is characterized in that: described are-tight layer is pure copper powder and pure chromium powder mixture.
15. contacts of vacuum switch according to claim 14 is characterized in that: the ratio of described pure copper powder and pure chromium powder is 10: 90 to 90: 10.
16. according to claim 14 or 15 described contacts of vacuum switch, it is characterized in that: described pure copper powder is that-80 orders are to-400 orders; Pure chromium powder is that-80 orders are to-400 orders.
17. contacts of vacuum switch according to claim 1 is characterized in that: described are-tight layer is silver powder and chromium powder mixture.
18. contacts of vacuum switch according to claim 1 is characterized in that: described are-tight layer is the sheet material or the bulk of chromiumcopper material.
19. contacts of vacuum switch according to claim 1 is characterized in that: described are-tight layer is the sheet material or the bulk of silver-colored evanohm material.
20. contacts of vacuum switch according to claim 1 is characterized in that: described conductive component is copper or silver-colored material.
21. contacts of vacuum switch according to claim 1 is characterized in that: described conductive component be shaped as powder or sheet material or bar or tubing or bulk or wire rod.
22. contacts of vacuum switch according to claim 1 is characterized in that: described magnetic production part part be shaped as powder or sheet material or bar or tubing or bulk or wire rod.
23. according to claim 1 or 22 described contacts of vacuum switch, it is characterized in that: described magnetic production part partly or entirely is the soft magnetism material.
24. contacts of vacuum switch according to claim 23 is characterized in that: described soft magnetism material is the electrical pure iron material.
25. contacts of vacuum switch according to claim 24 is characterized in that: the shape of described soft magnetism material can be powder or sheet material or bar or tubing or bulk or wire rod.
26. contacts of vacuum switch according to claim 1 and 2 is characterized in that: the cross section of the notch of described magnetic production part is circle or ellipse or triangle or square or rectangular.
27. contacts of vacuum switch according to claim 26 is characterized in that: the cross section of described conductive component for corresponding circle or ellipse or the triangle or the square or rectangular in cross section of the notch of described magnetic production part.
28. contacts of vacuum switch according to claim 26 is characterized in that: the radius of described circular notch is 5% to 45% of a housing width.
29. contacts of vacuum switch according to claim 26 is characterized in that: the length of described oval notch is 10% to 100% of housing width, and width is 10% to 90% of a housing width.
30. contacts of vacuum switch according to claim 26 is characterized in that: the length of described triangle notch is 10% to 100% of housing width, and width is 10% to 90% of a housing width.
31. contacts of vacuum switch according to claim 26 is characterized in that: the width of described square notch is 10% to 90% of a housing width.
32. contacts of vacuum switch according to claim 26 is characterized in that: the length of described rectangle notch is 10% to 100% of housing width, and width is 10% to 90% of a housing width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100039869A CN100390918C (en) | 2005-01-14 | 2005-01-14 | Contacts of vacuum switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100039869A CN100390918C (en) | 2005-01-14 | 2005-01-14 | Contacts of vacuum switch |
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| CN1645535A CN1645535A (en) | 2005-07-27 |
| CN100390918C true CN100390918C (en) | 2008-05-28 |
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| CNB2005100039869A Expired - Fee Related CN100390918C (en) | 2005-01-14 | 2005-01-14 | Contacts of vacuum switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107068478B (en) * | 2016-12-29 | 2020-02-18 | 厦门宏发电力电器有限公司 | Iron core type longitudinal magnetic field electrode structure for vacuum arc-extinguishing chamber and assembling method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1373488A (en) * | 2001-02-28 | 2002-10-09 | 京东方科技集团股份有限公司 | Contact of integrated power switch |
| CN2779586Y (en) * | 2005-01-27 | 2006-05-10 | 京东方科技集团股份有限公司 | Vacuum switch contactor |
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2005
- 2005-01-14 CN CNB2005100039869A patent/CN100390918C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1373488A (en) * | 2001-02-28 | 2002-10-09 | 京东方科技集团股份有限公司 | Contact of integrated power switch |
| CN2779586Y (en) * | 2005-01-27 | 2006-05-10 | 京东方科技集团股份有限公司 | Vacuum switch contactor |
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| CN1645535A (en) | 2005-07-27 |
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