CN102308353B - Vacuum valve electric contact and use its vacuum circuit-breaker - Google Patents
Vacuum valve electric contact and use its vacuum circuit-breaker Download PDFInfo
- Publication number
- CN102308353B CN102308353B CN200980156342.XA CN200980156342A CN102308353B CN 102308353 B CN102308353 B CN 102308353B CN 200980156342 A CN200980156342 A CN 200980156342A CN 102308353 B CN102308353 B CN 102308353B
- Authority
- CN
- China
- Prior art keywords
- powder
- electric contact
- coating
- side electrode
- vacuum valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- 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
- H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves
Abstract
The invention provides electric contact, it does not add low-melting-point metal, can give full play to the reduction effect of deposition separating force, has excellent opening performance and electric conductivity, meanwhile, vacuum circuit-breaker can be made significantly miniaturized.Electric contact is made up of sintering metal, described sintering metal has the Cr coating comprising Cr, Cu and reaction/non-solid solution composition non-relative to Cu, be dispersed with Cr powder in Cu matrix, the coating comprising described non-reaction/non-solid solution composition of Cr powder surface is made up of any one in C, Mo, W.
Description
Technical field
The present invention relates to the New Vacuum Valve electric contact for vacuum circuit-breaker, vacuum shutter etc.
Background technology
The distributor that is subject to of vacuum circuit-breaker etc. pursues miniaturization, low priceization.For this reason, it may be necessary the electric contact low-intensity made in vacuum valve, reduce to make because of Joule heat electric contact each other deposition time separating force, the operating mechanism portion that will carry out electric contact on-off action is miniaturized.Most electric contact is used in the Cr-Cu based sintered alloy being dispersed with Cr in Cu matrix, as the means making its low-intensity, employs the method for adding the low-melting-point metals such as Te as shown in patent documentation 1 ~ 3.
Patent documentation 1: Japanese Unexamined Patent Publication 2005-135778 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2006-140073 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2003-223834 publication
Summary of the invention
The problem that invention will solve
In current Cr-Cu system electric contact, be added with the low-melting-point metals such as the Te of several % by weight, as the suppression composition that the easier composition of resistance to deposition of contact separation when making generation deposition or current interruption back contact surface are chapped.After with the addition of the low-melting-point metal of this degree amount, as easily occurring defect in the Cu matrix of conductive compositions or occurring that sintering is insufficient, sometimes can not obtain good electric conductivity and opening performance.In addition, when vacuum seal soldering makes vacuum valve, low-melting-point metal likely from electric contact volatilization, damages the viability of brazed portion, under may causing the low vacuum in vacuum valve.On the other hand, when low-melting-point metal addition is lower than appropriate amount, the low-intensityization that there will be electric contact is not enough, the situation of the reduction effect deficiency of separating force.
The object of the present invention is to provide electric contact and use its vacuum circuit-breaker, it can solve the problem of prior art, can give full play to the attenuating effect of deposition separating force, have excellent opening performance and electric conductivity, meanwhile, the significantly miniaturizations such as vacuum circuit-breaker can also be made.
For solving the means of problem
The feature of electric contact of the present invention is, has the Cr powder be dispersed in Cu matrix, is provided with the coating comprising reaction/non-solid solution composition non-relative to Cu at described Cr powder surface.
In addition, be further characterized in that, comprise the coating of described non-reaction/non-solid solution composition by any one in C, Mo, W.
Further, be further characterized in that, the thickness comprising the coating of non-reaction/non-solid solution composition of described Cr powder surface is more than 0.01 μm.
In addition, be further characterized in that, more than 75% of described Cr powder surface is coated to by the coating comprising described non-reaction/non-solid solution composition.
Further, be further characterized in that, there is space in 70% ~ 90% of the described coating of Cr powder and the interface of Cu matrix.
In addition, be further characterized in that, the amount of described Cr powder is 15 ~ 40 % by weight, and ensures the opening performance of electric contact.
In addition, the feature of the manufacture method of electric contact is, by the mixed-powder press molding that Cu powder is obtained by mixing mutually with the Cr powder being coated to reaction/non-solid solution composition non-relative to Cu, and the temperature below the fusing point of Cu carries out heat-agglomerating.
In addition, be further characterized in that, the particle diameter of described Cr powder is below 104 μm, and the particle diameter of described Cu powder below 61 μm, and guarantees the dispersiveness of Cr powder in Cu matrix, guarantees the agglutinating property of Cu powder.
In addition, the invention provides electrode, it is characterized in that, it is formed as disc-shape, there is the centre bore that is formed centrally in the circle of this circular plate shape and slit groove that many of being formed to peripheral part relative to this centre bore noncontact Qie Youyuan center are through, described disc-shape parts comprise the electric contact with above-mentioned formation, and described electrode also has and engages with the opposing face of the electric arc generating plane of described disc-shape parts the electrode bar be integrated.
In addition, the invention provides vacuum valve, have a pair fixed side electrode and drawer at movable side electrode, it is characterized in that in vacuum tank, at least one of described fixed side electrode and drawer at movable side electrode has above-mentioned electric contact.
In addition, the invention provides vacuum circuit-breaker, it has: have in vacuum tank the vacuum valve of a pair fixed side electrode and drawer at movable side electrode, described vacuum valve outer respectively with the conductor terminals of the described fixed side electrode in this vacuum valve and drawer at movable side Electrode connection and the opening and closing device driving described drawer at movable side electrode, it is characterized in that, described vacuum valve comprises above-mentioned vacuum valve.
Invention effect
Electric contact of the present invention has Cr and Cu and the composition with the non-reaction/non-solid solution of Cu, Cr powder is disperseed in Cu matrix, and there is the coating of the composition comprising non-reaction/non-solid solution with Cu on Cr powder surface, can prevent in sintering process, space is generated between Cr and Cu, Cr is solid-solution in Cu and causes both strong bonded, can reduce the boundary strength of Cr and Cu, and the power be separated to each other by the electric contact of deposition is reduced.
Accompanying drawing explanation
Fig. 1 is the schematic diagram representing the principle of the invention;
Fig. 2 is the horizontal sectional drawing of the structure of the electrode representing the embodiment of the present invention 1;
Fig. 3 is the II-II line profile in Fig. 2;
Fig. 4 is the schematic diagram of the vacuum valve of the embodiment of the present invention 2;
Fig. 5 is the schematic diagram of the vacuum circuit-breaker of the embodiment of the present invention 3;
Fig. 6 is the schematic diagram that the curb of the embodiment of the present invention 4 arranges transformer load-break switch.
Symbol description
1... electric contact
1a... fixation side electric contact
1b... drawer at movable side electric contact
2... slit groove
4,4a, 4b... electrode bar
6a... fixed side electrode
6b... drawer at movable side electrode
14... vacuum valve
17... upper terminal
18... current-collector
G... space
A... coating
Embodiment
Inventors of the present invention find, the reason causing the Cr-Cu being added with low-melting-point metal to sinter the intensity losses of electric contact is because the physical property between Cr powder and Cu matrix deviates from.That is, in current sintering process, low-melting-point metal preferentially melts to move and makes the interface of Cr and Cu forms space, causes the decline of boundary strength, the intensity as slider material is declined.Learn thus, as long as be coated to Cr powder surface by the composition with the non-reaction/non-solid solution of Cu, then with the sintering shrinkage of Cu matrix in sintering process, Cr and Cu can occur more reliably physical back from.
Fig. 1 is according to schematic view illustrating principle of the present invention.A () represents the Cr particle interface in Cu matrix.In Cr-Cu system, owing to spreading some Cr in Cr matrix, form solid solution layer S, produce firmly adhesion strength, therefore deposit resistance property is poor.B () represents and improves the example that deposit resistance property with the addition of Te.Due to the carrying out along with sintering process, Te melts mobile, forms (contraction of adjoint Cu matrix) space G, thus improve deposit resistance property between Cr-Cu.C () represents formation of the present invention.By being provided as the coating A of the material of the composition of non-reaction/non-solid solution with Cr on Cr surface, in sintering process, between Cr-Cu, forming space G, improve deposit resistance property.
Any one as the composition of the coating A of this and the non-reaction/non-solid solution of Cu, in preferred C, Mo, W.By these compositions are coated on Cr powder, Cr can be prevented to be solid-solution in Cu and to make both combine situation about strengthening.In addition, by only using any one in C, Mo, W, can to prevent due to non-reaction/non-solid solution composition reacting generating compound to each other thus the embrittlement of the coating caused destroys.
The coating thickness of the coating A of the non-reaction/non-solid solution composition of Cr powder surface adopts more than 0.01 μm, and by making the coating area with this coating thickness be more than 75% of Cr powder surface, the boundary strength that can obtain above-mentioned Cr and Cu reduces effect.If thickness, area are all little than this value, then prevent Cr to be solid-solution in the effect of Cu insufficient, can not get the effect reducing deposition separating force.
By the coating A of the non-reaction/non-solid solution composition of Cr powder surface, coating A after sintering and the interface of Cu matrix generate space G.This is owing to not producing chemical bonding at the interface of coating A and Cu matrix, with the sintering shrinkage of Cu occur at interface physical back from result.This space G, is preferably present in 70% ~ 90% of interface.Time less than this value, then boundary strength reduces insufficient.In addition, although space G is the more than 90% better of interface, due to the impact etc. of interface shape, the position of physical contact can be there is, therefore be difficult to produce the voidage more than 90%.
As mentioned above, in order to the effect that the deposition separating force obtaining the coating A of the non-reaction/non-solid solution composition based on Cr powder surface reduces, preferably not forming reactions product (compound) between Cr powder and non-reaction/non-solid solution becomes.If this is due to generation compound around Cr powder, then when compound layer decomposes, contained Cr is just likely solid-solution in Cu matrix, promotes the combination at the interface of Cr and Cu, and boundary strength just likely can not decline.In addition, if compound generates, then with reaction, the just likely miniaturization of Cr powder, thus improve withstand voltage properties, likely damage the distinctive opening performance of Cr on the other hand.Therefore, Cr powder surface be the object of the invention is preferably realizing by being coated to the monomer layer of Cu non-reaction/non-solid solution composition of any one comprised in C, Mo, W.
In electric contact of the present invention, the amount of Cr is preferably in 15 ~ 40 % by weight scopes.Cr amount is fewer than this, then withstand voltage properties reduces, and than this electric conductivity reduction at most, meanwhile, agglutinating property reduces, and is difficult to manufacture fine and close electric contact, can not obtains sufficient opening performance.
The manufacture method of electric contact of the present invention, that the Cr powder of the powder of Cu with the composition being coated to reaction/non-solid solution non-with Cu is mixed, after this mixed-powder press molding, heat-agglomerating at the temperature below the fusing point of Cu, can realize being easier to and the manufacture of low cost.Non-reaction/non-solid solution composition is coating to Cr powder, can by physical vapor deposition method or other process for treating surface such as application evaporations, also can the mechanicalness Composite technology such as application machine fusion method.The press molding of mixed-powder, by using the mould of net shape to be shaped, carrying out machining after can noting be used in heat-agglomerating, just can manufacture the electric contact of net shape.This heat-agglomerating due in a vacuum, or is carried out in inertia or reproducibility environment, prevents the oxidation adding and hanker, can ensure the high vacuum of vacuum valve.The particle diameter of the material powder used is preferred: Cr powder is below 104 μm, and Cu powder is below 61 μm.If each particle diameter is larger than this value, then after sintering, the uniformity of tissue will decline, and in the contact face when current interruption, Cu will liquate, easily deposition occurs.
The electrode of electric contact of the present invention is used to form disc-shape, there is the centre bore at the round center being formed at this circular plate shape, with many that are formed to peripheral part relative to this centre bore noncontact Bing Congyuan center through slit grooves, also there is the electrode bar of the opposing face of the electric arc generating plane being integrally engaged in disc-shape parts, disc-shape parts comprise electric contact of the present invention, therefore can obtain opening performance excellence, the electrode with expected performance that deposition separating force is little.
Vacuum valve of the present invention, possesses a pair fixed side electrode and drawer at movable side electrode in vacuum tank, and wherein at least one comprises the electrode using electric contact of the present invention.In addition, vacuum circuit-breaker of the present invention has vacuum valve, conductor terminals and opening and closing device, described vacuum valve has at least one fixed side electrode using electric contact of the present invention and drawer at movable side electrode in vacuum tank, described conductor terminals this vacuum valve outer respectively with the fixed side electrode in vacuum valve and drawer at movable side Electrode connection, described opening and closing device drives drawer at movable side electrode.Thus, can obtain having excellent opening performance and electric conductivity, electric contact to each other deposition time separating force little, operating mechanism portion can be made miniaturized, the small-sized and vacuum circuit-breaker of low price, and various vacuum opening and closing device.
Below, implement best mode of the present invention according to being illustrated by embodiment, but the present invention is not limited only to these embodiments.
Embodiment 1
Make the electric contact of composition as shown in table 1, make electrode with this.
[table 1]
Fig. 2 is the horizontal sectional drawing of the structure representing the electrode made, and Fig. 3 is the II-II line profile of Fig. 2.In Fig. 2, Fig. 3,1 is electric contact, and 2 is the slit groove for providing actuating force to electric arc, and 3 is the stiffener of stainless steel, and 4 is electrode bar, and 5 is braze, and 44 electric arc occur and the medium pore stagnated for preventing in the central authorities of electric contact 1.
The work method of electric contact 1 is as follows.First, the Mo with Cu non-reaction/non-solid solution composition is coated on Cr powder.In the present embodiment, Cr powder (particle diameter less than 88 μm) and Mo powder (particle diameter 0.7 μm) are utilized the strong load mixing of mixing screw, implement Mo and be coated to.The thickness of Mo coating and the coating area occupation ratio of Cr powder surface is adjusted by the combined amount of Mo powder and incorporation time.
Secondly, the Cu powder this Mo being coated to Cr powder and particle diameter less than 60 μm is mixed by V-type blender with the mix proportion that the Cr amount becoming table 1 is such.Next, this mixed-powder is filled in the mould of disc-shape, utilizes hydraulic press to be shaped with the exert pressure of 400MPa.The density of formed body is about 73%.By it in the hydrogen environment of 40Pa pressure, with heat-agglomerating in 1060 DEG C × 2 hours, make the sintered body of the base material forming electric contact 1.The relative density of the sintered body obtained is about 96%.
Machining is carried out to the sintered body obtained, makes the electric contact 1 of shape as shown in Figure 2.In addition, also can utilize the method making to being shaped and have in the mould of the net shape of slit groove 2 and medium pore 44 and fill mixed-powder and also sinter, obtain electric contact 1, because the method does not need the aft-loaded airfoil such as machining, therefore can easily make.
As the comparative example of embodiment 1, make the electric contact (No.10 of the table 1) Ni being solid-solution in Cu being coated on Cr powder.Undertaken by plating method the Ni of Cr powder is coating, operation is afterwards same as described above.
In addition, as other comparative example, make the electric contact (No.11 of table 1) being added with Te as one of current material.It, after being mixed by V-type blender together with above-mentioned Cr powder and Cu powder by Te powder (particle diameter less than 45 μm), is shaped, sinters, is made.Press molding condition, sintering condition are same as described above.
Further, as other comparative example, the refractory metal made beyond as Cr uses the electric contact (No.12 of table 1) with the Mo of Cu non-reaction/non-solid solution composition.It, after being mixed by V-type blender together with above-mentioned Cu powder by Mo powder (particle diameter less than 63 μm), is shaped, sinters, is made.Press molding condition, sintering condition are same as described above.
The manufacture method of electrode is as follows.Cross machining in advance and make electrode bar 4 by oxygen-free copper, and mistake machining uses SUS304 to make stiffener 3 in advance, braze 5 is inserted, by it 8.2 × 10 between the electric contact 1 obtained in above-mentioned sintering and machining, stiffener 3 and electrode bar 4 are respective
-4with the heating of the condition of 970 DEG C × 10 points of kinds in the vacuum of below Pa, make electrode as shown in Figure 3.This electrode is 7.2kV for rated voltage, and rated current is 600A, and rated breaking current is the electrode of the vacuum valve of 20kA.In addition, as long as the intensity of electric contact 1 is enough, then stiffener 3 can be saved.
Embodiment 2
Use the electrode fabrication vacuum valve that embodiment 1 makes.The specification of vacuum valve is rated voltage 7.2kV, rated current 600A, rated breaking current 20kA.
Fig. 4 is the schematic diagram representing that the vacuum valve 14 of the present embodiment constructs.In Fig. 4,1a is fixation side electric contact, and 1b is drawer at movable side electric contact, and 3a, 3b are stiffener, and 4a is fixed side electrode rod, and 4b is drawer at movable side electrode bar, thus, forms fixed side electrode 6a, drawer at movable side electrode 6b.In addition, in embodiment 2, fixation side is set to consistent on the contact surface with the slit groove 2 of the electric contact of drawer at movable side.
The drawer at movable side baffle plate 8 dispersed of metallic vapour etc. when drawer at movable side electrode 6b is by preventing open circuit, soldered joint is on drawer at movable side support 12.They utilize fixation side end plate 9a, and drawer at movable side end plate 9b and insulating cylinder 13, by high vacuum sealed with brazing, are connected with external conductor with the threaded portion of fixed side electrode 6a and drawer at movable side support 12.The inside of insulating cylinder 13 is provided with the baffle plate 7 that when preventing open circuit, metallic vapour etc. disperses, and in addition, is provided with the guide 11 for supporting slipper between drawer at movable side end plate 9b and drawer at movable side support 12.Be provided with bellows 10 between drawer at movable side baffle plate 8 and drawer at movable side end plate 9b, under the state that can keep vacuum in vacuum valve 14, drawer at movable side support 12 moved up and down, opening and closing fixed side electrode 6a and drawer at movable side electrode 6b.
Embodiment 3
Secondly, the vacuum circuit-breaker carrying the vacuum valve made in embodiment 2 is made.Fig. 5 is the schematic diagram of the vacuum circuit-breaker representing vacuum valve 14 of the present invention and its operating mechanism.
Being configured to of vacuum circuit-breaker, before operating mechanism portion is configured in, the back side is configured with three groups of epoxy resin cylinders 15 of the three-phase shape in the lump of supporting vacuum valve 14.Vacuum valve 14 utilizes the opening and closing of operating mechanism portion by insulating bar 16.
When vacuum circuit-breaker closed circuit state, electric current flows through upper terminal 17, electric contact 1a, 1b, current-collector 18 and lower terminal 19.Interelectrode contact force is kept by the contact spring 20 being arranged on insulating bar 16.The electromagnetic force that interelectrode contact force and short circuit current produce is kept by cramp bar 21 and pillar 22.Make input coil 30 excitation, then plunger 23 is by open-circuit condition by lance 24 jack-up roller 25, after making between mobile jib 26 rotary closing electrode, is kept by pole 21.
When vacuum circuit-breaker open-circuit condition, when making trip coil 27 excitation, the engaging of pillar 22 opened by release lever 28, is opened between mobile jib 26 rotation electrode.When vacuum circuit-breaker open-circuit condition, after being opened between electrode, recover link by back-moving spring 29, pillar 22 engages simultaneously.In this case to input coil 30 excitation, then form closed circuit state.In addition, 31 is aiutage.
Rated voltage 7.2kV shown in being used in example 2 by the electric contact made in embodiment 1, rated current 600A, the vacuum valve of rated breaking current 20kA, is equipped on the vacuum circuit-breaker shown in embodiment 3, makes a service test.
Table 1 is for representing the table of electric contact composition and performance test results, and No.1 ~ No.5 represents the embodiment of the present invention, and No.6 ~ No.12 represents comparative example.Each performance, shows by relative value using the result of the No.11 as existing slider material for benchmark.
In addition, the thickness of the coating of Cr powder refers to, after the Cr powder after coating is carried out resin landfill, grinds and use electron microscope and x-ray analysis equipment to measure the numerical value of gained to powder section.The area occupation ratio of coating, is measured by the coating component distributing of x-ray analysis equipment to powder surface, and represents with the ratio that coating composition detection area is long-pending relative to powder surface.Voidage on the interface of refractory metal powder or its coating and Cu matrix, the electric contact section after being sintered by electron microscope observation, and there is length with space and represent relative to the ratio of interface length.
The example that No.6 represents the thickness of the Mo coating of Cr powder surface, area occupation ratio does not meet scope of the present invention, separation property difference compared with the No.11 of current material.
No.7 is the example that the area occupation ratio of coating does not meet scope of the present invention, although Cr is inhibited to a certain extent to being solid-solubilized in of Cu, conductivity improves, and separation property is poor, does not replace the advantage of current material No.11.
No.8 and No.9 represents that the Cr amount of electric contact is at extraneous example of the present invention.In No.8, because high-resistance Cr is less, conductivity and current interruption excellent performance, because Cr powder is coated to by Mo, visible separation property improves, but withstand voltage properties declines.In No.9, because the Cr of refractory metal is more, withstand voltage properties is excellent, and meanwhile, the absolute value that Mo is coated to area increases, and visible separation property significantly improves, but conductivity and current interruption hydraulic performance decline.
No.10 is the example composition Ni being solid-solution in Cu being coated on Cr powder, although the Ni of Cr powder is coated to area occupation ratio be roughly 100%, is solid-solution in Cu matrix, produces the space at interface hardly owing to sintering rear Ni.Thus, the conductivity of Cu matrix reduces, and conductivity and current interruption performance decline to a great extent, and meanwhile, separation property is poor.Thus, coating composition and the non-reaction/non-solid solution of Cu that can say Cr powder are necessary.
No.12 replaces Cr as refractory metal and contains the example of the Mo of non-reaction/non-solid solution composition with Cu.Mo is not solid-solution in Cu matrix, and the space at interface fully produces, and therefore conductivity and separation property improve, and meanwhile, proof voltage also improves, but Mo and Cr compares due to less to the contribution of current interruption, the significantly reduction of visible current interruption performance.
Compared with above comparative example, No.1 ~ No.5 separation property of the embodiment of the present invention all significantly improves, and other performance also has no obvious reduction.In addition, because the amount of Cr is to conductivity, the impact of current interruption performance and proof voltage is comparatively large, because Cr amount causes these hydraulic performance declines in No.3 and No.5, but all using in clog-free scope reality.
As mentioned above, according to electric contact of the present invention, there is excellent opening performance, electric conductivity and withstand voltage properties, and the boundary strength of Cr and Cu is declined, thus the separating force between the contact of deposition can be made significantly to reduce, obtain vacuum valve and the vacuum circuit-breaker that can realize the miniaturization of operating mechanism portion.
Embodiment 4
The vacuum valve made in embodiment 2 is mounted on the vacuum opening and closing device beyond vacuum circuit-breaker.Fig. 6 represents that the curb carrying the vacuum valve 14 made in embodiment 2 arranges the schematic diagram of the load-break switch of transformer.
This load-break switch is formed by the multipair vacuum valve 14 being equivalent to major loop opening/closing portion of storage in vacuum-packed outside vacuum tank 32.Outside vacuum tank 32 possesses top sheet material 33, lower sheet 34 and sidepiece sheet material 35, and the surrounding (limit) of each sheet material, by being welded to each other joint, is together arranged with apparatus body meanwhile.
Top sheet material 33 is formed top through hole 36, the edge of each top through hole 36 covers the insulating properties top base 37 that each top through hole 36 is fixed with annular like that.Further, circular recess reciprocating motion (moving up and down) the insertion freely columned drawer at movable side electrode bar 4b of the central authorities of each top base 37 is formed at.That is, each top through hole 36 is by top base 37 and drawer at movable side electrode bar 4b obturation.
The axial end portion (upper side) of drawer at movable side electrode bar 4b is connected with the electromagnetic operator of the outer setting of outside vacuum tank 32.In addition, in the lower side of top sheet material 33, edge along each top through hole 36 pumps and is configured with outside bellows 38 freely, the end side of the axis of each outside bellows 38 is fixed on the lower side of top sheet material 33, and another axial side is arranged on the outer peripheral face of each drawer at movable side electrode bar 4b.That is, in order to outside vacuum tank 32 is formed airtight construction, the edge of each top through hole 36 there are outside bellows 38 along the axial arrangement of each drawer at movable side electrode bar 4b.In addition, top sheet material 33 is connected to blast pipe (omitting diagram), carries out vacuum exhaust by this blast pipe in outside vacuum tank 32.
On the other hand, lower sheet 34 is formed with bottom through hole 39, is fixed with insulating properties lining 40 at edges cover each bottom through hole 39 of each bottom through hole 39.The bottom of each insulating properties lining 40 is fixed with the insulating properties lower base 41 of annular.And, be inserted with columned fixed side electrode rod 4a at the circular recess of the central authorities of each lower base 41.That is, the bottom through hole 39 being formed at lower sheet 34 is inaccessible by insulating properties lining 40, lower base 41 and fixed side electrode rod 4a respectively.And the lower side of the axis of fixed side electrode rod 4a is connected with the distribution cable of the outside being configured in outside vacuum tank 32.
In the inside of outside vacuum tank 32, be accommodated with the vacuum valve 14 of the major loop opening/closing portion being equivalent to load-break switch, each drawer at movable side electrode bar 4b is interconnected by having two bends and having flexible fexible conductor 42.Fexible conductor 42 intersects lamination by copper coin and corrosion resistant plate, and multiple are formed, and these copper coins and corrosion resistant plate are the conductivity sheet material axially with two bends.Fexible conductor 42 is formed with through hole 43, inserts each drawer at movable side electrode bar 4b at each through hole 43 and be connected to each other.
As mentioned above, the vacuum valve of the present invention made in embodiment 2 is also applicable to the load-break switch that curb arranges transformer, is also applicable to the various vacuum opening and closing devices such as vacuum insulated switchgear in addition.
Claims (10)
1. electric contact, it has Cu matrix, the Cr powder be dispersed in Cu matrix, it is characterized in that, is provided with the coating comprising reaction/non-solid solution composition non-relative to Cu at described Cr powder surface,
More than 75% of described Cr powder surface is coated to by described coating,
Space is there is at 70% ~ 90% of the described coating of Cr powder and the interface of Cu matrix.
2. electric contact, it has Cu matrix, the Cr powder be dispersed in Cu matrix, and it is characterized in that, have coating at described Cr powder surface, described coating comprises any one in C, Mo, W,
More than 75% of described Cr powder surface is coated to by described coating,
Space is there is at 70% ~ 90% of the described coating of Cr powder and the interface of Cu matrix.
3. electric contact as claimed in claim 1 or 2, it is characterized in that, the thickness of described coating is more than 0.01 μm.
4. electric contact as claimed in claim 1 or 2, it is characterized in that, the amount of described Cr powder is 15 ~ 40 % by weight.
5. electric contact as claimed in claim 3, it is characterized in that, the amount of described Cr powder is 15 ~ 40 % by weight.
6. the manufacture method of electric contact, is characterized in that, by the mixed-powder press molding that Cu powder is obtained by mixing with the Cr powder being coated to reaction/non-solid solution composition non-relative to Cu, the temperature below the fusing point of Cu carries out heat-agglomerating;
More than 75% of described Cr powder surface is coated to by described coating,
Space is there is at 70% ~ 90% of the described coating of Cr powder and the interface of Cu matrix.
7. the manufacture method of electric contact as claimed in claim 6, it is characterized in that, the particle diameter of described Cr powder is below 104 μm, and the particle diameter of described Cu powder is below 61 μm.
8. electrode, it is characterized in that, it is formed as disc-shape, there is the centre bore at the round center being formed at this disc-shape and the through slit groove of many of being formed to peripheral part relative to this centre bore noncontact Qie Youyuan center, the parts of described disc-shape comprise the electric contact according to any one of Claims 1 to 5, and also have and engage with the opposing face of the electric arc generating plane of the parts of described disc-shape the electrode bar be integrated.
9. vacuum valve, it has a pair fixed side electrode and drawer at movable side electrode in vacuum tank, it is characterized in that, at least one in described fixed side electrode and drawer at movable side electrode comprises electrode according to claim 8.
10. vacuum circuit-breaker, it has vacuum valve, conductor terminals and opening and closing device, described vacuum valve has a pair fixed side electrode and drawer at movable side electrode in vacuum tank, described conductor terminals described vacuum valve outer respectively with the described fixed side electrode in described vacuum valve and drawer at movable side Electrode connection, described opening and closing device drives described drawer at movable side electrode, it is characterized in that, described vacuum valve comprises vacuum valve according to claim 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2009/000618 WO2010095163A1 (en) | 2009-02-17 | 2009-02-17 | Electrical contact for vacuum valve and vacuum circuit breaker using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102308353A CN102308353A (en) | 2012-01-04 |
| CN102308353B true CN102308353B (en) | 2015-09-30 |
Family
ID=42633470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980156342.XA Expired - Fee Related CN102308353B (en) | 2009-02-17 | 2009-02-17 | Vacuum valve electric contact and use its vacuum circuit-breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5159947B2 (en) |
| CN (1) | CN102308353B (en) |
| WO (1) | WO2010095163A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658243B (en) * | 2020-11-21 | 2022-10-25 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuW/CuCr integral contact |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4640999A (en) * | 1982-08-09 | 1987-02-03 | Kabushiki Kaisha Meidensha | Contact material of vacuum interrupter and manufacturing process therefor |
| CN1132212C (en) * | 1997-01-13 | 2003-12-24 | 株式会社东芝 | Contacting material for vacuum switch |
| CN1815655A (en) * | 2005-01-31 | 2006-08-09 | 京东方科技集团股份有限公司 | Arc-resistance piece structure and vacuum switch contact |
| CN1892956A (en) * | 2005-07-07 | 2007-01-10 | 株式会社日立制作所 | Electrical contacts for vacuum circuit breakers and methods of manufacturing the same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS598015B2 (en) * | 1978-05-31 | 1984-02-22 | 三菱電機株式会社 | Vacuum shield contact |
| JPS5619832A (en) * | 1979-07-27 | 1981-02-24 | Mitsubishi Electric Corp | Vacuum breaker contact |
| JPS603822A (en) * | 1983-06-22 | 1985-01-10 | 株式会社明電舎 | Electrode material of vacuum interrupter and method of producing same |
| JP3663038B2 (en) * | 1997-09-01 | 2005-06-22 | 芝府エンジニアリング株式会社 | Vacuum valve |
| JP3442644B2 (en) * | 1998-03-02 | 2003-09-02 | 芝府エンジニアリング株式会社 | Contact material for vacuum valve |
| JP2000188045A (en) * | 1998-12-24 | 2000-07-04 | Hitachi Ltd | Vacuum breaker, vacuum bulb used therefor and its electrode |
| JP2003183749A (en) * | 2001-12-13 | 2003-07-03 | Toshiba Corp | Vacuum circuit-breaker and contact material for this |
| JP2003223834A (en) * | 2002-01-31 | 2003-08-08 | Hitachi Ltd | Electrical contact member and manufacturing method therefor |
| CN1256744C (en) * | 2002-08-08 | 2006-05-17 | 株式会社东芝 | Vacuum breaker |
| JP2006233298A (en) * | 2005-02-25 | 2006-09-07 | Toshiba Corp | Contact material for vacuum valve and its production method |
-
2009
- 2009-02-17 JP JP2011500352A patent/JP5159947B2/en not_active Expired - Fee Related
- 2009-02-17 CN CN200980156342.XA patent/CN102308353B/en not_active Expired - Fee Related
- 2009-02-17 WO PCT/JP2009/000618 patent/WO2010095163A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4640999A (en) * | 1982-08-09 | 1987-02-03 | Kabushiki Kaisha Meidensha | Contact material of vacuum interrupter and manufacturing process therefor |
| CN1132212C (en) * | 1997-01-13 | 2003-12-24 | 株式会社东芝 | Contacting material for vacuum switch |
| CN1815655A (en) * | 2005-01-31 | 2006-08-09 | 京东方科技集团股份有限公司 | Arc-resistance piece structure and vacuum switch contact |
| CN1892956A (en) * | 2005-07-07 | 2007-01-10 | 株式会社日立制作所 | Electrical contacts for vacuum circuit breakers and methods of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2010095163A1 (en) | 2012-08-16 |
| WO2010095163A1 (en) | 2010-08-26 |
| JP5159947B2 (en) | 2013-03-13 |
| CN102308353A (en) | 2012-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1776855B (en) | Electrode, electrical contact and method of manufacturing the same | |
| EP2081200B1 (en) | Electrical contact for vacuum interrupter | |
| JP6200669B2 (en) | Electrical contact material | |
| JP2020509163A (en) | Improved electrical contact alloy for vacuum contactors | |
| JP2005135778A (en) | Electric contact and its manufacturing method, electrode for vacuum bulb, vacuum bulb using it, and vacuum interrupter | |
| EP3062327A1 (en) | Electrical contact for vacuum valve and process for producing same | |
| CN104795264A (en) | Method for manufacturing arc-resistant copper-tungsten contacts for high-voltage switches | |
| US6437275B1 (en) | Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof | |
| CN102308353B (en) | Vacuum valve electric contact and use its vacuum circuit-breaker | |
| CN105821234A (en) | Preparation method for graphene-reinforcing silver-based sliding electrical contact material | |
| US20060081560A1 (en) | Vacuum circuit breaker, vacuum interrupter, electric contact and method of manufacturing the same | |
| EP2323148A1 (en) | Electric contact and vacuum interrupter using the same | |
| KR20010050169A (en) | Electrode, electrode for vacuum valve, vacuum valve and vacuum load-break switch | |
| JP2008021590A (en) | Electrical contact for vacuum valve, its manufacturing method, electrode for vacuum valve, vacuum valve, and vacuum breaker | |
| JP6145285B2 (en) | Electrical contact material, method for producing the same, and electrical contact | |
| CN104103434B (en) | A kind of low-voltage electrical apparatus copper base electric contact composite material and temperature-pressure formation thereof | |
| JP2006147263A (en) | Electrode for vacuum circuit breaker, vacuum valve, and manufacture thereof | |
| JP5409739B2 (en) | Junction structure, electrical contact, and manufacturing method thereof | |
| JP2002015644A (en) | Contact material for vacuum circuit breaker, its manufacturing method and vacuum circuit breaker | |
| EP0917171A2 (en) | Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof | |
| JP5668123B2 (en) | Junction structure, electrical contact | |
| JP2002161327A (en) | Contact material for circuit breaker, manufacturing method therefor, and circuit breaker | |
| JP2008171622A (en) | Contact material for vacuum valve | |
| JPH02117035A (en) | Electrode material of vacuum interrupter | |
| JP2002270071A (en) | Vacuum circuit breaker, and vacuum valve and electric contact used for the vacuum circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20160217 |