CN103021727B - Connected structure, electric contact and manufacture method thereof - Google Patents
Connected structure, electric contact and manufacture method thereof Download PDFInfo
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- CN103021727B CN103021727B CN201210276116.9A CN201210276116A CN103021727B CN 103021727 B CN103021727 B CN 103021727B CN 201210276116 A CN201210276116 A CN 201210276116A CN 103021727 B CN103021727 B CN 103021727B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
- H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Powder Metallurgy (AREA)
- Contacts (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Manufacture Of Switches (AREA)
Abstract
The invention provides connected structure, electric contact and manufacture method thereof.Low cost and do not use brazing material ground attachment each other.Connected structure possesses multiple parts and makes the powder containing metal adhere to the attachment accumulation horizon be deposited on above-mentioned multiple parts, utilizes heat, mechanical alloying combination, engage above-mentioned multiple parts by above-mentioned multiple parts and above-mentioned attachment accumulation horizon.In addition, above-mentioned base material is made up of high conductance metal, above-mentioned engaging member is cup-shaped and is made up of high conductance metal, above-mentioned attachment accumulation horizon is the contact layer of metal containing fire resistance or compound and high conductance metal, and one side and the open end of the cup-shaped of above-mentioned engaging member of above-mentioned base material utilize above-mentioned heat, mechanical alloying joint.
Description
Technical field
The present invention relates to electric power shutter connected structure, electric contact and manufacture method thereof that vacuum circuit-breaker, vacuum switching device, gas-insulated switchgear device etc. use.
Background technology
The electric power opening and closing device of turn-off current possesses in-built electrical contact in a vacuum, as by the vacuum valve of the container of vacuum sealing.Electric contact utilizes the manufacture method manufacture such as sintering process or solution saturates method, carries out machining as required.Electric contact, with after energized components soldering (once engaging), being assembled under the state in the container forming vacuum valve, after carrying out soldering closed (secondary joint) to container in a vacuum, is built in vacuum valve by this electric contact.Like this, generally in the manufacture method of electric contact, soldering operation needs to engage with the joint of energized components and vacuum sealing the operation of more than at least two benches, and the manufacture of vacuum valve comprising electric contact spends larger expense.
In addition, if do not possess the soldering of electric contact and energized components, then because electric contact at work comes off, arc light heating when electric current disconnects or the Joule heating in energising, brazing material is vaporized, and electrical property declines, and product reliability declines.Therefore, even if in soldering, also require, in a soldering, there is higher reliability, for obtaining being arranged near junction surface for keeping making an effort in shape of the sound brazing state in the position, shape etc. of suitable brazing material amount.
Prior art document
Patent documentation 1: Japanese Unexamined Patent Publication 2007-157666 publication
Above-mentioned patent documentation 1 realizes the raising of soldering viability by making the shape optimization of brazed portion.But, as long as use brazing material, just likely cause joint reliability to decline because its heating is vaporized.In addition, owing to utilizing the manufacture method of the electric contact of sintering process or solution saturates method to need larger thermal energy, therefore contact method self becomes the main cause that cost increases.
Summary of the invention
The object of the invention is to low cost and do not use brazing material ground attachment each other.
In order to solve above-mentioned problem, the feature of connected structure of the present invention is, possess multiple parts, make the powder containing metal adhere to the attachment accumulation horizon be deposited on above-mentioned multiple parts, by the utilization heat of above-mentioned multiple parts and above-mentioned attachment accumulation horizon, mechanical alloying combination, engage above-mentioned multiple parts.
Effect of the present invention is as follows.
According to the present invention, welding material ground attachment can be used at lower cost and not each other.
Accompanying drawing explanation
Fig. 1 is the cutaway view of connected structure of the present invention.
Fig. 2 is the cutaway view of other connected structures of the present invention.
Fig. 3 is the cutaway view of other connected structures of the present invention.
Fig. 4 is the cutaway view of other connected structures of the present invention.
Fig. 5 is the cutaway view of other connected structures of the present invention.
Fig. 6 is the cutaway view of the structure of electric contact of the present invention.
Fig. 7 is the cutaway view of the stereogram of contact layer of the present invention and the structure of other electric contacts.
Fig. 8 is the cutaway view of the structure of other electric contacts of the present invention.
Fig. 9 is the vertical view of the base material for electric contact of the present invention.
Figure 10 is the cutaway view with the structure of the electric contact of the contact layer of multiple composition of the present invention.
Figure 11 is the cutaway view of other connected structures of the present invention.
Figure 12 is the cutaway view of the structure of the vacuum valve representing the second embodiment.
Figure 13 is the cutaway view of the structure of the vacuum circuit-breaker representing the 3rd embodiment.
Figure 14 is the cutaway view of the structure of the load-break switch representing the 3rd embodiment.
In figure: 1, 1a, 1b-engaging member, 2, 2a, 2b-base material, 3-attachment accumulation horizon, 4, 45-through hole, 5-protuberance, 6, 6a, 6b-contact layer, 7-support component, 8-brazing material, 9-step, 10-shielding part, 11-drawer at movable side shielding part, 12a-fixation side end plate, 12b-drawer at movable side end plate, 13-bellows, 14-guide, 15-drawer at movable side support, 16-ceramic insulation cylinder, 17-epoxy cylinder, 18-insulating bar, 19-upper terminal, 20-set electron, 21-lower terminal, 22-contact spring, 23-support bar, 24-pillar, 25-plunger, 26-pinking bar, 27-roller, 28-mobile jib, 29-trip coil, 30-trip rod, 31-back-moving spring, 32-drop into coil, 33-aiutage, 34-outside vacuum tank, 35-top sheet material, 36-lower sheet, 37-sidepiece sheet material, 38-top through hole, 39-upper base, 40-outside bellows, 41-bottom through hole, 42-insulating properties axle sleeve, 43-bottom matrix, 44-flexible conductor, 46a-fixed side electrode rod, 46b-drawer at movable side electrode bar, 47-the second contact layer (contact layer), 48-the three contact layer (contact layer), 49-energized components, 100, 200, 300, 400, 800, 900, 1000, 1200-electric contact, 500-vacuum valve, 600-vacuum circuit-breaker, 700-load-break switch, 1100-be formed in contact layer (contact layer) on copper mesh.
Embodiment
Fig. 1 and Fig. 2 represents the cutaway view of connected structure of the present invention.In Fig. 1 and Fig. 2,1 is engaging member, and 2 is base materials, and 3 is attachment accumulation horizons, and 4 is be located at the through hole on base material 2, and 5 is be located at the protuberance in engaging member 1.
The first structure shown in Fig. 1 is fitted together to the through hole 4 of base material 2 and the protuberance 5 of engaging member 1.The surface of the front end of protuberance 5 can be given prominence to (X > Y) from the surface of base material 2, can at grade (X=Y), also can than the surface of base material 2 to recessed (X < Y).Following structure is also identical.In addition, engaging member 1 can not be chimeric at the axle center of engaging member 1 as shown with base material 2.Part engaging member 1 contacted with base material 2, as fitting portion, this fitting portion forms attachment accumulation horizon 3.By make the powder containing metal adhere to be deposited in base material 2 and protuberance 5(engaging member 1) two parts on, be formed as this attachment accumulation horizon 3 is contacted with base material 2 and engaging member 1, by utilizing heat, mechanical alloying combination, base material 2 and engaging member 1 can be engaged.
In addition, the second structure shown in Fig. 2 loads base material 2 in engaging member 1, and the through hole 4 of base material 2 is overlapped with the par of engaging member 1, in the mode of filling through hole 4, the powder attachment containing metal is piled up.Thus, by utilizing attachment accumulation horizon 3 and base material 2 and the heat of engaging member 1, mechanical alloying combination, base material 2 and engaging member 1 can be engaged.Engaging member 1 can be uneven with the contact-making surface of base material 2, and through hole 4 can be recessed in the mode further to downward-extension.By these structures, lower fusing point can not be used and the ground such as the low brazing material of thermal endurance engage base material 2 and engaging member 1.After joint, the removings such as machining are utilized to become the attachment accumulation horizon 3 of jut on the surface of base material 2, even if make the surface planarisation of base material 2 also can maintain engagement state.
In addition, as shown in Figure 3, by making the protuberance surface roughness of protuberance 5 thick, arranging small concavo-convex, the mechanical bond (so-called anchoring effect) between protuberance 5 and attachment accumulation horizon 3 or contact area can be increased, thus more solid combination can be obtained.
In addition, as shown in Figure 4, can by identical with Fig. 3 for the surface of engaging member 1 contacted with attachment accumulation horizon 3 coarse or arrange minute asperities, as shown in Figures 4 and 5, if arrange cone or R portion on the through hole 4 of base material 2, attachment accumulation horizon 3 becomes more solid with the combination of engaging member 1.
Fig. 6 and Fig. 8 represents the cutaway view of the structure of the electric contact of the present invention utilizing above-mentioned connected structure.In Fig. 6 and Fig. 8,1 is the cup-shaped or bar-shaped engaging member that are made up of high conductance metal, 2 is the base materials be made up of high conductance metal, 6 is comprise the metal of fire resistance or compound and high conductance metal and by the contact layer of adhering to accumulation horizon 3 and forming, 7 is the support components for strengthening the space between engaging member 1 and base material 2,8 is be positioned in the brazing material between support component 7 and engaging member 1 and base material 2, and 9 is the steps for locating being located at engaging member 1 and the coincidence part of base material 2.
At Fig. 6 and Fig. 8 in each, (a) is the electric contact 100 and 300 of the first structural engagement utilized in above-mentioned connected structure shown in Fig. 1, and (b) is the electric contact 200 and 400 utilizing the second structural engagement shown in Fig. 2.By the attachment of arbitrary occasion, accumulation horizon 3 is all double does contact layer 6, joint and the contact layer 3 of engaging member 1 and base material 2 can utilize above-mentioned connected structure to be formed in an operation to the formation on base material 2 simultaneously, the manufacture can carrying out the electric contact of low cost, the joint of contact peripheral part not using brazing material.
In addition, be positioned in upper and lower brazing material 8 melting in the closed brazing process of vacuum valve afterwards of support component 7, soldering for support component 7 is fixed, owing to being configured in the back side central authorities of contact layer 6, therefore the impact that the material risen with the temperature in work is vaporized is little, as long as support component 7 does not fixedly have fault, then can omit.In addition, be located at 9, step on base material 2 otherwise impact is brought on the positioning precision with engaging member 1, then can omit.In addition, in the electric contact 100 and 200 of structure with Fig. 6, the shape of the through hole 4 of the base material 2 used, can for elongated hole circumferentially such shown in the vertical view along Fig. 9 (b) except arranging multiple through hole 4 in a circumferential direction equably with the circle shown in the vertical view of Fig. 9 (a).Thus, junction surface size increases, favourable to the raising of bond strength and powered.
In addition, in the electric contact 300 and 400 of structure with Fig. 8, the part (coincidence part of through hole 4 and protuberance 5 or engaging member 1 and base material 2) that base material 2 contacts with engaging member 1 arranges threaded portion, be threaded connection base material 2 and engaging member 1, the inclination of the base material 2 in the forming process of contact layer 6 described later can be prevented or come off.In addition, the electric contact 100 and 200 becoming the structure of Fig. 6 also can become the structure shown in Fig. 7.That is, using the net that is made up of high conductance metal as base material 2, form contact layer 6 thereon.Now, loading net by the base of the hard of release agent on tabular surface, powder is being adhered to from it and piles up and form contact layer 6.The external diameter of this contact layer 6 is less than the internal diameter of the engaging member 1 of cup-shaped.Integrated with contact layer 6 for netted base material 2 contact layer 1100 is positioned in and is configured with on the support component 7 of engaging member 1 and brazing material 8, powder is adhered to relative to the peripheral part that netted base material 2 and engaging member 1 overlap and piles up and be connected (1200).In the structure shown here, because base material 2 is little netted for what pile up, therefore, it is possible to make electric contact 1200 lightweight, be conducive to reducing using material.
The high conductance metal of the formation engaging member 1 of electric contact of the present invention and a part for base material 2 or contact layer 6 is Cu or Ag or the alloy that is main component with them.Thus, suppress the temperature with the electric contact of energising to rise, prevent contact layer 6 deposition each other contacted with each other, and good energising performance can be guaranteed.In addition, the metal of the fire resistance of a part for formation contact layer 6 or compound is made to be in Cr, Co, W, WC more than at least one.Thereby, it is possible to find as the voltage-resistent characteristic (are-tight property) of electric contact necessity or electric current turn-off characteristic etc.In addition, attachment accumulation horizon 3 particle diameter becoming contact layer 6 is less than 75 μm, is made up of the metal of above-mentioned fire resistance or the powder (hereinafter referred to as raw meal) of compound and high conductance metal.Thus, obtain fine and close attachment accumulation horizon 3, and can effectively pile up filling raw meal relative to the inside (Fig. 2) of the surrounding of fitting portion (Fig. 1) or through hole 4, obtain good engagement state.If the particle diameter of raw meal exceedes general 75 μm, then the weight of powder particle increases, and adheres to pile up owing to making raw meal, therefore required conflict speed cannot be obtained, in addition, owing to forming gap between the easy particle piling up, fine and close attachment accumulation horizon 3 cannot therefore be obtained.
Figure 10 will form different multiple contact layer and be configured to the cutaway view of the structure of the occasion of ring-type, of the present invention electric contact diametrically.In Fig. 10,47 is form the second different contact layer from contact layer 6, and 48 is that any one forms the 3rd different contact layer from contact layer 6 and 47.Figure 10 (a) is the electric contact 800 that two kinds of contact layer 6 and 47 central shaft is set to ring-type symmetrically, Figure 10 (b) is the electric contact 900, Figure 10 (c) that three kinds of contact layer 6,47 and 48 central shaft is set to concentric circles is symmetrically the electric contact 1000 that two kinds of contact layer 6 and 47 central shaft is alternatively set as ring-type symmetrically.The electrical property of electric contact changes according to the composition of contact.Therefore, by there are the different multiple contact layer of composition, the electric contact can realize that there is multiple function, such as disconnecting performance, withstand voltage properties, low surge etc.In addition, the electric contact with the contact layer of this multiple composition can be applied to the structure of Fig. 6 (a) and (b), Fig. 7 (b), Fig. 8 (b) equally.In addition, just form with regard to different multiple contact layer, can realize too from the electric contact of the outside week alternately configuration radially of central shaft.
Above connected structure and electric contact are by relative to the fitting portion of base material 2 and engaging member 1 or the position that overlaps, the method such as utilize thermal spraying or explosive compaction is shaping is with the raw meal collision making at a high speed formation adhere to accumulation horizon 3, plastic deformation of powders, utilization is hot, mechanical alloying to be carried out attachment accumulation and obtains.Metal or the compound of fire resistance generally compare hard, even if be therefore also difficult to plastic deformation to make at a high speed this powder collide, pile up relative to the position attachment for the purpose of one-tenth hardly, if but the powder containing more soft high conductance metal, then because it is involved in the metal of fire resistance or the powder of compound while pile up, therefore described above, the different contact layer of each composition 6,47,48 can be obtained.Utilize and also can be used in the connection of the engaging member shown in Figure 11 and energized components 49 by the heat of this powder, the joint of mechanical alloying two parts.That is, under the state loaded making engaging member 1 and energized components 49 closely sealed, the edge along this contact site makes powder with high velocity impact, and can connect both by forming attachment accumulation horizon 3, these also can be applied to the situation of Fig. 6 (b) or Fig. 7 (b).
In addition, the contact layer 6,47,48 formed by attachment accumulation horizon 3 can make form interim or change continuously at its thickness direction (the opening and closing direction of electric contact) respectively.Such as, when forming contact layer 6,47,48 by thermal spraying, by making the composition of the powder of supply stage or changing continuously, contact layer is the composition tilted in a thickness direction.Now, be the composition that the conductive metal high with base material 2 adaptation is many by making base material 2 side, make the face side of contact layer 6,47,48 be the composition that the metal of fire resistance or compound are many, the excellent adhesion with base material 2 can be obtained, there is the contact layer 6,47,48 of sufficient voltage-resistent characteristic.
Vacuum valve of the present invention possesses a pair fixation side contact and drawer at movable side contact in vacuum tank, and by having electric contact of the present invention on the contact of at least one party, the electric current that can realize excellence in a vacuum disconnects performance and withstand voltage properties.
Vacuum circuit-breaker of the present invention possess fixation side contact in above-mentioned vacuum valve and drawer at movable side contact each on be connected to conductor terminals outside vacuum valve, drive the switching mechanism of drawer at movable side contact, by this vacuum valve, there is electric contact of the present invention, sufficient function can be played as vacuum circuit-breaker.
A side in a pair electric contact of electric power shutter of the present invention is made up of electric contact of the present invention, by making a pair electric contact contact or leaving, possesses the mechanism making current electrifying or disconnection.Thereby, it is possible to play sufficient electric current to disconnect the performance as electric power shutter such as performance in vacuum, inert gas, the arbitrary atmosphere of air.
Below, utilize embodiment to explain preferred mode for carrying out an invention, but the present invention is not defined in these embodiments.
(embodiment one)
In the structure shown in Fig. 8 and Figure 10 (a), manufacture the electric contact 300,400 and 800 of contact layer 6 for the composition (assay value) shown in table 1.Any one base material 2 is all diameter 54mm, thickness 5mm, the internal diameter 12mm of through hole 4, and base material 2 and engaging member 1 are oxygen-free copper.In addition, as comparing product, also manufacturing and having used Cu-Mn-Ni class brazing material to carry out the electric contact of soldering to the base material 2 without through hole 4 and the engaging member 1 without protuberance 5.
First, the manufacture method of the electric contact 300 and 400 of the present embodiment is described.In the occasion (No.1, No.2 and No.6 of table 1) that the composition of contact layer 6 is Cu-Cr, be used in raw meal and coordinated particle size range to be the Cu powder of 25 ~ 75 μm and the mixed powder of Cr powder in the mode of the composition obtaining the contact layer 6 shown in table 1.In the occasion (No.3 and No.4 of table 1) consisting of Ag-WC of contact layer 6, be used in raw meal and coordinated particle size range to be the Ag powder of 0.3 ~ 45 μm and the mixed powder of WC powder in the mode of the composition obtaining the contact layer 6 shown in table 1.Under the state being combined with base material 2 and engaging member 1, these mixed powder thermal sprayings on the surface of base material 2, make these mixed powders collide and carry out attachment to pile up by use Ar+H2 mist.In the No.6 that the scope of composition shown in table 1 of contact layer 6 changes continuously, control Cu powder and Cr powder feed system separately respectively, makes the composition of the thickness direction of contact layer 6 interim or change continuously from substrate side to face side.After the raw meal that the about 3mm of surface sediment of base material 2 is thick, utilize machining to be cut to the about 2mm of thickness, obtain the electric contact 300 and 400 that contact layer 6 and the aggregate thickness of base material 2 are approximately 5mm.
Then, the manufacture method (No.5 of table 1) of the electric contact 800 of the present embodiment is described.Above-mentioned mixed powder is used in raw meal.First, under the state being combined with base material 2 and engaging member 1, by having the barricade (cover) in the hole of internal diameter 25mm, use Ar+H
2mist by the thermal spraying of Ag-WC mixed powder base material 2 central portion on the surface, carry out colliding and adhere to accumulation.In addition, under the state that the barricade (cover) of external diameter 25mm is configured in the central authorities of base material 2, similarly thermal spraying Cu-Cr mixed powder adhere to accumulation.Afterwards, implement machining same as described above, obtain the contact layer 6 at inner circumferential side (about 25mm diameter) with Ag-WC, there is at outer circumferential side the electric contact 800 of the contact layer 47 of Cu-Cr.
Then, to comparing in product the connected structure with Fig. 8 (a), the manufacture method of the electric contact 300 of No.9 and No.10 that the particle size range of raw meal is different from the present embodiment is described.Raw meal use particle size range be 45 ~ 105 μm and the Cu powder of 80 ~ 150 μm and the mixed powder of Cr powder.After utilizing the method thermal spraying identical with above-mentioned the present embodiment to the surface of base material 2 this mixed powder, utilize machining cutting surface, the summation thickness obtaining contact layer 6 and base material 2 is the electric contact 300 of about 5mm.
Then, the manufacture method comparing in product the electric contact (No.7 and No.8) utilizing soldered joint base material 2 and engaging member 1 is described.The Cu-Cr mixed powder identical with No.1 ~ No.5 and Ag-WC mixed powder is used in raw meal.Utilizing the method identical with above-mentioned product of the present invention by after these mixed powder thermal sprayings are on the surface of base material 2 without through hole 4, utilizing machining cutting surface, making the thickness of contact layer 6 be about 2mm.Between the back side of this base material 2 and the tabular surface (diameter 12mm) of engaging member 1, load Cu-Mn-Ni class brazing material (thickness 0.1mm), use vacuum furnace about 3 × 10
-3carry out the heating of 960 DEG C × 10 points in the vacuum of Pa, obtain soldering and there is on surface the base material 2 of contact layer 6 and the electric contact of engaging member 1.
As mentioned above, utilize connected structure and the manufacture method of the present embodiment, implement the formation of contact layer 6 and the joint of miscellaneous part simultaneously, confirm the electric contact that can obtain the structure identical with existing method for brazing.In addition, the formation of the contact layer 6 of the present embodiment uses hot spray process, as long as but powder is collided and carries out adhering to the method for piling up, even if additive method (such as explosive compaction shaping etc.), also same electric contact can be obtained.
[table 1]
(embodiment two)
Be used in the vacuum valve of electric contact 300,400 and 800 manufacture as the electric current release mechanism portion of vacuum circuit-breaker of manufacture in embodiment one.Figure 12 is the cutaway view of the structure of the vacuum valve 500 representing the present embodiment, and specified mode is voltage 24kV, electric current 1250A, turn-off current 25kA.In fig. 12, contact layer 6a and 6b, base material 2a and 2b, engaging member 1a and 1b is utilized to form fixation side electric contact and the drawer at movable side electric contact of 300,400 or 800 respectively.10 is the shielding parts in order to prevent dispersing of metallic vapour when disconnecting etc. to be located at the inner surface of ceramic insulation cylinder 16,11 is the drawer at movable side shielding parts preventing metallic vapour etc. from dispersing to drawer at movable side direction, 15 is utilize the drawer at movable side support of threaded portion for being connected with external conductor, 12a, 12b are fixation side end plate, drawer at movable side end plate respectively, 13 is for making the bellows by making drawer at movable side support about 15 under the state remaining vacuum in vacuum valve 500, and 14 is the guides for supporting the slipper between drawer at movable side end plate 12b and drawer at movable side support 15.
More than use the lower brazing material of fusing point to engage in high vacuum, enclose inside is high vacuum.This vacuum sealing method for welding is as follows.These parts are assembled, now, in the silver brazing (Ag-Cu class brazing material) of the position mounting thickness 0.1mm needing to engage under the state shown in Figure 12.In vacuum furnace and about 3 × 10
-3in the vacuum of Pa, they are carried out to the heating of 820 DEG C × 12 points, closing under the state remaining vacuum in vacuum valve 500.
Table 1 represent determine the vacuum valve 500 obtained terminal between the result of resistance value of (between engaging member 1a and drawer at movable side support 15).In addition, this resistance value utilizes by being the self-closing power that vacuum produces, and measure under the state of closing (contact) at contact layer 6a and 6b, for formation electric contact 300,400 or 800 each parts between the standard of engagement state.In the electric contact utilizing existing joint method and soldering to manufacture, the occasion being 12.6 μ ' Ω (No.7), Ag-WC in contact layer 6 occasion that is Cu-Cr is 13.4 μ ' Ω (No.8).By comparison, vacuum valve 500(No.1 ~ the No.4 of the present embodiment of the electric contact 300,400 or 800 that built-in each connected structure of the Fig. 8 of utilization (a) and (b) manufactures and No.6) in the little value of the occasion of the composition of arbitrary contact layer 6 No.7 and No.8 that to be all Billy manufacture with soldering, owing to not having utilizingthebrazing material layer, therefore resistance is little.The No.6 especially with composition is less by about 5% than occasion (No.7) resistance of soldering.There is the electric contact 800(No.5 of the structure of Figure 10 (a)) represent resistance between No.7 and No.8.On the other hand, vacuum valve 500(No.9 and No.10 use particle diameter is the comparison product of the extraneous raw meal of the present embodiment) in, compared with utilizing the No.7 of existing method for brazing, resistance becomes large, find, along with the particle diameter of raw meal becomes large, to there is the tendency that resistance becomes large.Observe the result of the section structure around the contact layer 6 of No.9 and No.10 and junction surface, find more pore, find that this pore becomes large along with the particle diameter of raw meal, there is the tendency of increase.Therefore, if the particle diameter of raw meal is large, then the densification of contact layer 6 is not enough, and this becomes the main cause that resistance increases.Therefore, the particle diameter of raw meal expects the scope for the present embodiment.
As mentioned above, the electric contact of the present embodiment does not use brazing material and has sound engagement state, confirms to obtain the electrical property identical with existing method for brazing.
(embodiment three)
The vacuum valve 500 manufactured in embodiment two is assembled on the vacuum circuit-breaker 600 of the structure shown in Figure 13.Vacuum circuit-breaker 600 is in former configuration operating mechanism portion, and the three-phase one of configuration support vacuum valve 500 draws together the structure of formula three groups of epoxy cylinders 17 overleaf.Vacuum valve 500 passes through insulating bar 18 by operating mechanism opening and closing.Be the occasion of closed circuit state at circuit breaker, electric current flows through electric contact 300,400 or 800, set electron 20, lower terminal 21.Interelectrode contact force utilizes the contact spring 22 be arranged on insulating bar 18 to keep.Interelectrode contact force and the electromagnetic force produced by short circuit current are kept by support bar 23 and pillar 24.If excite input coil 32, then plunger 25 boosts roller 27 by pinking bar 26 from open-circuit condition, making mobile jib 28 rotate after also between closed electrode, utilizes support bar 23 to keep.Be, under the free state of triping, excite trip coil 29 at circuit breaker, trip rod 30 departs from the cooperation of pillar 24, and mobile jib 28 rotates and opens between electrode.Under circuit breaker is closed circuit state, opening after between electrode, bar utilizes back-moving spring 31 to reset, and pillar 24 coordinates simultaneously.In this condition, if excite input coil 32, be then closed circuit state.In addition, 33 is aiutages.
The vacuum valve 500 of the built-in electric contact 300,400 and 800 manufactured in embodiment one is assembled on vacuum circuit-breaker 600.In this condition for open test, the result that table 1 represents maximum turn-off current and dams.In the present embodiment, No.1 ~ No4 and No.6 is compared with having No.7, the No.8 of each contact layer 6 of Cu-Cr, Ag-WC utilizing existing soldered joint, and maximum turn-off current, damming all has identical value, confirms to have practical performance.In addition, the No.5 with the contact layer 6 and 47 of multiple composition represents that maximum turn-off current and the value of damming are the median of No.7 and No.8, confirms to have to disconnect the electrical characteristics such as performance and low surge.
Then, the vacuum valve 500 manufactured in embodiment two is arranged on the vacuum opening and closing device beyond vacuum circuit-breaker 600.Figure 14 is the load-break switch 700 having installed the vacuum valve 500 manufactured in embodiment two.
This load-break switch is being accommodated the multipair vacuum valve 500 being equivalent to main circuit opening/closing portion in the outside vacuum tank 34 of vacuum sealing.Outside vacuum tank 34 possesses top sheet material 35, lower sheet 36 and sidepiece sheet material 37, and the surrounding (edge) of each sheet material engages by welding mutually, and is arranged on equipment body.
Top sheet material 35 is formed top through hole 38, and the insulating properties upper base 39 of ring-type is fixed on the edge of each top through hole 38 in the mode covering each top through hole 38.Further, move back and forth at the circular recess of the central authorities being formed in each upper base 39 and be inserted with columned drawer at movable side electrode bar 46b freely.That is, each top through hole 38 is closed by upper base 39 and drawer at movable side electrode bar 46b.
The axial end portion (upper side) of drawer at movable side electrode bar 46b is attached on the operator (electromagnetic operator) of the outside being arranged on outside vacuum tank 34.In addition, move back and forth (moving up and down) in the lower side of top sheet material 35 along the edge of each top through hole 38 and configure outside bellows 40 freely, the end side of axis is fixed on the lower side of top sheet material 35 by each outside bellows 40, and another axial side is arranged on the outer peripheral face of each drawer at movable side electrode bar 46b.That is, in order to make outside vacuum tank 34b be enclosed construction, outside bellows 40 are had at the edge of each top through hole 38 along the axial arrangement of each drawer at movable side electrode bar 46b.In addition, top sheet material 35 is linked with blast pipe (omitting diagram), in outside vacuum tank 34, carries out vacuum exhaust by this blast pipe.
On the other hand, lower sheet 36 is formed with bottom through hole 41, insulating properties axle sleeve 42 is fixed on the edge of each bottom through hole 41 in the mode covering each bottom through hole 41.The insulating properties bottom matrix 43 of ring-type is fixed with in the bottom of each insulating properties axle sleeve 42.Further, columned fixed side electrode rod 46a is inserted with at the circular recess of the central authorities of each bottom matrix 43.That is, the bottom through hole 41 be formed on lower sheet 36 is closed by insulating properties axle sleeve 42, bottom matrix 43 and fixed side electrode rod 46 respectively.Further, the end side (lower side) of the axis of fixed side electrode rod 46a is attached on the cable (distribution wire) of the outside being configured in outside vacuum tank 34.
Accommodate the vacuum valve 500 of the main circuit opening/closing portion being equivalent to load-break switch in the inside of outside vacuum tank 34, each drawer at movable side electrode bar 46b is interlinked by the axle sleeve conductor (flexible conductor) 44 with two bends.This axle sleeve conductor 44 is configured at the axial alternately stacked copper coin of conductivity sheet material and corrosion resistant plate as having two bends.Axle sleeve conductor 44 is formed through hole 45, each through hole 45 inserts each drawer at movable side electrode bar 46 and interlinks.
As mentioned above, the vacuum valve of the present invention manufactured in embodiment two can be applied to vacuum circuit-breaker or install transformer load-break switch, also can be applied to the various vacuum opening and closing devices such as the switching device outside this.
Claims (11)
1. a connected structure, is characterized in that,
Possess: the 1st parts;
There is through hole, be arranged on the 2nd parts on above-mentioned 1st parts; And
Powder attachment containing metal is deposited on above-mentioned 1st parts and above-mentioned 2nd parts two parts, utilizes the attachment accumulation horizon of heat, above-mentioned 1st parts of mechanical alloying joint and above-mentioned 2nd parts,
Any one of above-mentioned 1st parts and above-mentioned attachment accumulation horizon possesses the protuberance of chimeric above-mentioned through hole,
Above-mentioned attachment accumulation horizon forms contact layer.
2. an electric contact, is characterized in that,
There is connected structure according to claim 1,
Above-mentioned 1st parts are cup-shaped and are made up of high conductance metal, above-mentioned 2nd parts are made up of high conductance metal, above-mentioned attachment accumulation horizon is one of both metal containing fire resistance or compound and the above-mentioned contact layer of high conductance metal, and the one side of above-mentioned 2nd parts utilizes above-mentioned connected structure to engage with the open end of the cup-shaped of above-mentioned 1st parts.
3. an electric contact, is characterized in that,
There is connected structure according to claim 1,
Above-mentioned 1st parts are bar-shaped and are made up of high conductance metal, above-mentioned 2nd parts are made up of high conductance metal, above-mentioned attachment accumulation horizon is one of both metal containing fire resistance or compound and the above-mentioned contact layer of high conductance metal, and the one side of above-mentioned 2nd parts utilizes above-mentioned connected structure to engage with one end of bar-shaped above-mentioned 1st parts.
4. the electric contact according to Claims 2 or 3, is characterized in that,
Above-mentioned high conductance metal is the alloy of Cu or Ag or Cu and Ag, and the metal of above-mentioned fire resistance or compound are more than at least one in Cr, Co, W, WC.
5. the electric contact according to Claims 2 or 3, is characterized in that,
The particle diameter of the powder of the metal of above-mentioned fire resistance of above-mentioned contact layer or the powder of compound and above-mentioned high conductance metal is less than 75 μm.
6. the electric contact according to Claims 2 or 3, is characterized in that,
Above-mentioned contact layer forms concentric circles by different forming diametrically.
7. the electric contact according to Claims 2 or 3, is characterized in that,
The composition interim or continuity ground change in a thickness direction of above-mentioned contact layer.
8. a manufacture method for electric contact, this electric contact is the electric contact described in Claims 2 or 3, and the feature of the manufacture method of this electric contact is,
Make the metal of above-mentioned fire resistance of formation above-mentioned attachment accumulation horizon or the powder of the powder of compound and above-mentioned high conductance metal to collide with raised part or above-mentioned through hole at a high speed, by with above-mentioned powder plastic deformation heat, mechanical alloying carry out attachment accumulation, raised part is the protuberance of chimeric above-mentioned 2nd parts and above-mentioned 1st parts, and above-mentioned through hole is positioned at above-mentioned 2nd parts.
9. a vacuum valve, it possesses a pair fixation side contact and drawer at movable side contact in vacuum tank, and the feature of this vacuum valve is,
At least one party of above-mentioned fixation side contact and drawer at movable side contact has the electric contact described in Claims 2 or 3.
10. a vacuum circuit-breaker, is characterized in that,
Possess vacuum valve according to claim 9, above-mentioned fixation side contact in above-mentioned vacuum valve and drawer at movable side contact each on the conductor terminals that is connected outward with above-mentioned vacuum valve and the switching mechanism driving above-mentioned drawer at movable side contact.
11. 1 kinds of electric power shutters, is characterized in that,
A side in a pair electric contact is made up of the electric contact described in Claims 2 or 3, and this electric power shutter possesses following mechanism: by making above-mentioned a pair electric contact contact in any one atmosphere of vacuum, inert gas, air or be separated, be switched on or switched off electric current.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011210080A JP5409739B2 (en) | 2011-09-27 | 2011-09-27 | Junction structure, electrical contact, and manufacturing method thereof |
| JP2011-210080 | 2011-09-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103021727A CN103021727A (en) | 2013-04-03 |
| CN103021727B true CN103021727B (en) | 2016-03-16 |
Family
ID=47080168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210276116.9A Expired - Fee Related CN103021727B (en) | 2011-09-27 | 2012-08-03 | Connected structure, electric contact and manufacture method thereof |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2575149A3 (en) |
| JP (1) | JP5409739B2 (en) |
| KR (1) | KR101445447B1 (en) |
| CN (1) | CN103021727B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015218480A1 (en) * | 2015-09-25 | 2017-03-30 | Siemens Aktiengesellschaft | Contact piece for a vacuum switch and electrical switch |
| KR20190070735A (en) * | 2017-12-13 | 2019-06-21 | 엘티메탈 주식회사 | Manufacturing method for electric contact material having brazing layer by thermal spray and electric contact material integrated with brazing layer prepared thereby |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776855A (en) * | 2004-11-15 | 2006-05-24 | 株式会社日立制作所 | Electrode, electrical contact and method of manufacturing the same |
| CN101797669A (en) * | 2009-01-07 | 2010-08-11 | 通用电气公司 | System and method of joining metallic parts using cold spray technique |
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| DE3107688C2 (en) * | 1981-02-28 | 1985-02-14 | Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen | Switch contact |
| US4530815A (en) | 1982-06-29 | 1985-07-23 | Mitsubishi Denki Kabushiki Kaisha | Method of producing a contact device for a switch |
| DE3842919C2 (en) * | 1988-12-21 | 1995-04-27 | Calor Emag Elektrizitaets Ag | Switch for a vacuum switch |
| JP2680536B2 (en) * | 1993-03-26 | 1997-11-19 | 株式会社ムサシノエンジニアリング | Vacuum fitting |
| TW265452B (en) * | 1994-04-11 | 1995-12-11 | Hitachi Seisakusyo Kk | |
| JPH09161583A (en) * | 1995-12-13 | 1997-06-20 | Toshiba Corp | Manufacture of contact member for vacuum circuit breaker |
| JPH09197075A (en) * | 1996-01-17 | 1997-07-31 | Mitsubishi Electric Corp | Structure of vacuum seal |
| DE19650752C1 (en) * | 1996-12-06 | 1998-03-05 | Louis Renner Gmbh | Sintered copper@-chromium@ vacuum contact material |
| EP0917171A3 (en) * | 1997-11-14 | 1999-07-28 | Hitachi, Ltd. | Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof |
| DE19809306A1 (en) * | 1998-03-05 | 1999-09-09 | Abb Patent Gmbh | Contact piece for a vacuum chamber and method for producing the contact piece |
| JP2000235825A (en) * | 1999-02-16 | 2000-08-29 | Hitachi Ltd | Electrode member for vacuum circuit-breaker and manufacture thereof |
| JP2000251585A (en) * | 1999-02-25 | 2000-09-14 | Toshiba Corp | Arc resistant coating for electric equipment |
| JP2001227643A (en) * | 2000-02-14 | 2001-08-24 | Tsukishima Kikai Co Ltd | Seal structure for vacuum container, and gasket for sealing vacuum container |
| JP4455066B2 (en) * | 2004-01-08 | 2010-04-21 | 株式会社日立製作所 | Electrical contact member, method of manufacturing the same, vacuum valve and vacuum circuit breaker using the same |
| JP4640148B2 (en) * | 2005-12-09 | 2011-03-02 | 株式会社日立製作所 | Vacuum container and power distribution switchgear using the vacuum container |
| US20090324401A1 (en) * | 2008-05-02 | 2009-12-31 | General Electric Company | Article having a protective coating and methods |
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2011
- 2011-09-27 JP JP2011210080A patent/JP5409739B2/en not_active Expired - Fee Related
-
2012
- 2012-08-02 KR KR1020120084765A patent/KR101445447B1/en not_active IP Right Cessation
- 2012-08-02 EP EP12179082.8A patent/EP2575149A3/en not_active Withdrawn
- 2012-08-03 CN CN201210276116.9A patent/CN103021727B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776855A (en) * | 2004-11-15 | 2006-05-24 | 株式会社日立制作所 | Electrode, electrical contact and method of manufacturing the same |
| CN101797669A (en) * | 2009-01-07 | 2010-08-11 | 通用电气公司 | System and method of joining metallic parts using cold spray technique |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013073701A (en) | 2013-04-22 |
| CN103021727A (en) | 2013-04-03 |
| KR101445447B1 (en) | 2014-09-26 |
| EP2575149A3 (en) | 2014-09-24 |
| JP5409739B2 (en) | 2014-02-05 |
| KR20130033945A (en) | 2013-04-04 |
| EP2575149A2 (en) | 2013-04-03 |
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Effective date of registration: 20170317 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Sanki System Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Ltd. |
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