CN101714478A - A contact structure of a vacuum valve and manufacture method thereof - Google Patents
A contact structure of a vacuum valve and manufacture method thereof Download PDFInfo
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- CN101714478A CN101714478A CN200910205001A CN200910205001A CN101714478A CN 101714478 A CN101714478 A CN 101714478A CN 200910205001 A CN200910205001 A CN 200910205001A CN 200910205001 A CN200910205001 A CN 200910205001A CN 101714478 A CN101714478 A CN 101714478A
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- cylinder
- electrode bar
- contact
- vacuum valve
- contact chip
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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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- 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
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Contacts (AREA)
- Manufacture Of Switches (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a contact structure of a vacuum valve, in this structure, a contact chip, an electrode bar and screw thread for connecting external manipulator or wire laying are integrated by simple method without pressurizing, and can easily ensure size of optimized relative part. The invention also provides a method for producing contact structure of the same. Base material (27) of the electrode bar is an oxygen-free copper, which is mounted inside an austenitic stainless steel cylinder (26) on the bottom (25). A molding block (28) made of copper chrome sintered body is put on the opening of the cylinder (26). An infiltration material (29) of oxygen-free copper is placed on a molding block (28). A subassembly (30) is heated at 1,200 DEG in hydrogen atmosphere to melt base material (27) of an electrode bar and the infiltration material (29). The infiltration material (29) stuffs a positive hole in a multiple-hole die clamp dog (28), and rest falls into the cylinder (26) to stuff inside of the cylinder (26) together with base material (27) of the electrode bar. After cooling and curing, the contact chip (32) (formed by the molding block (28) and the infiltration material (29) ), the cylinder (26), and base material (27) of the electrode bar are linked together firmly on their interface. Thereafter an external thread is formed on lower perimeter of the cylinder (26).
Description
The cross reference of related application
The application is based on the Japanese patent application of submitting on October 2nd, 2008 2008-257407 number, and requires its priority, and the content of this application is included this paper in way of reference.
Background of invention
1. technical field
The present invention relates to a kind of be used to connect/cut off the vacuum valve contact structures of electric current in the vacuum circuit-breaker and the manufacture method of these contact structures.
2. background technology
Fig. 4 is the cutaway view of the major part structure of conventional vacuum valve.The vacuum valve of Fig. 4 has the ceramic insulation post 1 that is used to guarantee electric insulation.The two ends of insulated column 1 are provided with plating 2a, the 2b that can carry out soldering.The headboard that is made of metal and bottom end plate 3a, 3b are attached to the surface of plating 2a, 2b respectively to form vacuum tank 4.
Extending bellows 9 is arranged to be attached to the circumference of the central opening on the headboard 3a of vacuum tank 4.The movable electrode rod 6 (one of two electric contact pieces of vacuum valve) of movable contact 5 passes the bottom sealing plate central link of bellows to bellows 9 and lid 11, movably to be fixed on the upright position by bellows.
The part that is higher than by bellows 9 retaining parts of movable electrode rod 6 is projected into vacuum tank 4 outsides.On the top of the ledge of movable electrode rod 6, with the attached regularly pin thread 12 of brazing layer 13, movable electrode rod 6 is connected to peripheral operation device (not shown).
Therefore, movable contact 5 comprises: but moving contacting plate 15; But moving contacting plate attachment portion 14, but by brazing layer 16 is attached regularly moving contacting plate 15 arranged on it; Movable electrode rod 6, but it is an integral body with moving contacting plate attachment portion 14; And pin thread 12, it is attached to the outer end of movable electrode rod 6 regularly by brazing layer 13.
The fixed electrode rod 8 of fixed contact therefor 7 (another in two electric contact pieces of vacuum valve) links and is fixed to the circumference of the central opening of bottom end plate 3b in its outer end.In the outer end, negative thread 17 links by brazing layer 20 and is fixed into from the structure of outer end face insertion fixed electrode rod.
In opposite the inner, the outer end with wherein inserting and be fixed with negative thread 17 of fixed electrode rod 8, fixed contact piece attachment portion 18 forms integral body with fixed electrode rod 8, and fixed contact piece attachment portion 18 has the inner wide transverse plane than electrode bar 8.On the transverse plane of fixed contact piece attachment portion 18, fixed contact piece 19 arranged by brazing layer 21 is attached regularly.
Therefore, fixed contact therefor 7 comprises: but moving contacting plate 19; Fixed contact piece attachment portion 18 has a fixed contact piece 19 by brazing layer 21 is attached regularly on it; Fixed electrode rod 8, itself and fixed contact piece attachment portion 18 are an integral body; And negative thread 17, it inserts and is attached to regularly the outer end of fixed electrode rod 8.
In having vacuum valve shown in Figure 4 and structure as mentioned above, movable electrode rod 6 is connected to peripheral operation device (not shown) by pin thread 12, and but the moving contacting plate 15 that is fixed on the movable electrode rod 6 on the extending bellows 9 is connected to fixed contact piece 19 and throws off the hermetic seal of maintenance vacuum tank 4 with fixed contact piece 19.
When electric current flows through vacuum valve, but moving contacting plate 15 is connected to fixed contact piece 19.Having under the situation of any problem, the operator (not shown) upwards is pulled out to headboard 3a top according to external signal with the outer end of movable electrode rod 6.So, but the moving contacting plate 15 that is arranged on movable electrode rod 6 the inners regularly throw off with fixed contact piece 19, and keep the hermetic seal of vacuum tank 4, thereby unclamp contact.
When but moving contacting plate 15 is thrown off with fixed contact piece 19, between contact chip, produce electric arc and launch spark.For the inwall that prevents insulated column 1 is subjected to the pollution of spark, but be provided with arc shield spare 22 in the contact chip position of moving contacting plate 15 and fixed contact piece 19 and the centre between insulated column 1 inwall, this shielding part is by 8 supportings of fixed electrode rod.
The vacuum valve of Fig. 4 has the basic structure of conventional vacuum valve.But by linking moving contacting plates 15 and movable electrode rod 6 with brazing layer 16, linking fixed contact piece 19 and fixed electrode rod 8, link movable electrode excellent 6 and be used to be connected to the pin thread 12 of peripheral operation device and assemble contact in this structure with the negative thread 17 that brazing layer 20 links fixed electrode excellent 8 and is used to be connected to outside cloth line terminals with brazing layer 13 with brazing layer 21.
Therefore, the assembling of the conventional vacuum valve preparation that need bother is to form brazing layer on the surface that will carry out soldering.In addition, the pin thread that is used to be connected to operator with movable electrode rod 6 and the brazing operation that is used to be connected to the negative thread 17 of outside cloth line terminals and fixed electrode rod 8 comprise and must guarantee to solve between movable electrode rod 6 and the pin thread 12 and the difficult problem of the optimum relative portion size between fixed electrode excellent 8 and the negative thread 17.
When the material that requires pin thread 12 has corrosion resistance, need to use austenitic stainless steel.But austenitic stainless steel demonstrates the relatively poor wettability of brazing material.Therefore, use the surface preparation that the screw thread of austenitic stainless steel need be such as nickel plating.
For fear of the preliminary treatment of the various troubles that are used for soldering, patent documentation 1 has disclosed a kind of vacuum circuit-breaker, wherein links or integrally formed electrode piece of high temperature insostatic pressing (HIP) (HIP) and current-carrying spare by solid phase.
[patent documentation 1 :]
The Japanese unexamined patent application discloses H07-335092 number
But solid phase binding meeting can't realize the enough point of contact density for linking the required boundary strength in interface.In addition, solid phase links needs for example 100 tons or bigger forcing press, therefore comprises the problem of large-scale technology.
Although the high temperature insostatic pressing (HIP) utilization links high binding density and gives enough boundary strengths than solid phase, high temperature insostatic pressing (HIP) also comprises the problem of the operation of the trouble of using the gases at high pressure device.
Summary of the invention
Consider the problems referred to above in the routine techniques, the purpose of this invention is to provide a kind of contact structures of vacuum valve and the method for this structure of manufacturing, the screw thread that contact chip, electrode bar and being used to is connected to peripheral operation device or wiring in this structure forms one by straightforward procedure and need not pressurization, easily guarantees the relative portion size with the optimization between the electrode bar of screw thread.
A kind of contact structures that are used to connect/cut off the vacuum valve of electric current, these contact structures are a first aspect of the present invention, comprising: contact chip; Electrode bar, this electrode bar is connected to contact chip; And cylinder, this cylinder supporting contact chip and electrode bar, and have pin thread, this pin thread is formed on the periphery of an end opposite with the other end that supports contact chip, wherein contact chip, electrode bar and cylinder is formed one.
A kind of contact structures that are used to connect/cut off the vacuum valve of electric current, these contact structures are a second aspect of the present invention, comprising: contact chip; Electrode bar, this electrode bar is connected to contact chip; And cylinder, this cylinder supporting contact chip and electrode bar; And negative thread, this negative thread is formed in the electrode bar at an end place opposite with the other end with the supporting contact chip of cylinder, wherein contact chip, electrode bar, cylinder and negative thread is formed one.
A kind of method of making the contact structures of vacuum valve, this method is a third aspect of the present invention, may further comprise the steps: the cylinder that (1) preparation has cup-like structure, this cylinder has the bottom; (2) basis material with electrode bar is installed in the cylinder; (3) with molded opening part that is fixed on the basis material that is used for the installing electrodes rod of cylinder of sintered body; (4) the infiltration material is placed on the molded top surface; Above-mentioned four steps constitute the assembly of the basis material that comprises cylinder, electrode bar, molded and infiltration material together; (5) in nonoxidizing atmosphere, heat the assembly that comprises the infiltration material by powder metallurgic method, this heating steps may further comprise the steps: (i) form contact chip by the infiltration material being penetrated in molded and at the place, top of cylinder, (ii) by the infiltration material being penetrated into being used for fixing of cylinder molded position and one is formed on contact chip and cylinder top, (iii) be penetrated in the cylinder and in cylinder by the infiltration material, and the basis material of cylinder and electrode bar formed one, thereby the formation electrode bar, and (iv) the outer surface by the infiltration material being penetrated into electrode bar and cylinder inwall and electrode bar and cylinder are formed one; (6) cut the bottom of cylinder to expose the basal surface of electrode bar; And (7) form pin thread on the periphery of a cylinder end opposite with the other end that forms contact after above-mentioned steps.
A kind of method of making the contact structures of vacuum valve, this method is a fourth aspect of the present invention, may further comprise the steps: the cylinder that (1) preparation has cup-like structure, described cylinder has inwardly outstanding jut in the center of the bottom of cylinder; (2) be put on the jut by basis material and the basis material of electrode bar is installed in the cylinder electrode bar; (3) with molded opening part that is fixed on the basis material that is used for the installing electrodes rod of cylinder of sintered body; (4) the infiltration material is placed on the molded top surface; Above-mentioned four steps constitute the assembly of the basis material that comprises cylinder, electrode bar, molded and infiltration material together; (5) in nonoxidizing atmosphere, heat the assembly that comprises the infiltration material by powder metallurgic method, this heating steps may further comprise the steps: (i) form contact chip by the infiltration material being penetrated in molded and at the place, top of cylinder, (ii) by the infiltration material being penetrated into being used for fixing of cylinder molded position and one is formed on contact chip and cylinder top, (iii) and in cylinder by the infiltration material being penetrated in the cylinder, and the material of cylinder and electrode bar formed one, thereby form to surround the electrode bar of jut, and (iv) the outer surface by the infiltration material being penetrated into electrode bar and cylinder inwall and electrode bar and cylinder are formed one; (6) cut the bottom of cylinder to expose the basal surface of the electrode bar that forms around the bottom of jut; And (7) form negative thread on jut after above-mentioned steps.
The invention provides a kind of contact structures of vacuum valve and the method for this structure of manufacturing, the screw thread that contact chip, electrode bar and being used to is connected to peripheral operation device or wiring in this structure forms one by straightforward procedure and need not pressurization, easily guarantees the relative portion size with the optimization between the electrode bar of screw thread.
Description of drawings
Hereinafter describe some preferred embodiments with reference to the accompanying drawings in detail according to the embodiment of the invention.
Fig. 1 (a) and 1 (b) are this cutaway views of process of formation one of method that the example 1 of the contact structures of making vacuum valve is shown;
Fig. 2 illustrates in the method for example 1 of the contact structures of making vacuum valve the cutaway view of the structure of the body after being heating and curing after fine finishining;
Fig. 3 (a) and 3 (b) illustrate the cutaway view of example that in the method for example 2 of the contact structures of making vacuum valve two form the assembly of one;
Fig. 3 (c) is the cutaway view that the structure of the contact structures of finishing is shown; And
Fig. 4 is the cutaway view of the major part structure of conventional vacuum valve.
The explanation of Reference numeral
1: insulated column
2a, 2b: plating
3a: headboard
3b: bottom end plate
4: vacuum tank
5: movable contact
6: the movable electrode rod
7: fixed contact therefor
8: the fixed electrode rod
9: bellows
11: lid
12: pin thread
13: brazing layer
14: but the moving contacting plate attachment portion
15: but moving contacting plate
16: brazing layer
17: negative thread
18: the fixed contact piece attachment portion
19: fixed contact piece
20,21: brazing layer
22: arc shield spare
25: base section
26: cylinder
27: the basis material of electrode bar
28: molded
29: the infiltration material
30: assembly
31: the body after being heating and curing
32: contact chip
33: electrode bar
34: the interface between contact chip and the cylinder
35: the interface between cylinder and the electrode bar
36: contact chip inside
37: the interface between contact chip and the electrode bar
38: flange
39: the hollow circle tube part
41: pin thread
42: contact
43,44: assembly
45: jut
46; Separate section
47; Welding portion
48; Negative thread
49; Contact
Embodiment
Fig. 1 (a) and 1 (b) are the cutaway views that the process of the formation one in the method for example 1 of the contact structures of making vacuum valve is shown.The contact structures that the method for the contact structures of the vacuum valve by making example 1 is made are corresponding to the movable contact 5 of vacuum valve shown in Figure 4.
At first, in the method for the contact structures of the manufacturing vacuum valve of example 1, the cylinder 26 of preparation cup-like structure shown in Fig. 1 (a), this cup-like structure has bottom 25.It is that 16mm, internal diameter are that the 10mm and the degree of depth are the container of the cup-like structure of 25mm that cylinder 26 is made external diameter by austenitic stainless steel (the coding SUS304 of Japanese Industrial Standards) bar.
The basis material 27 of electrode bar is installed in this cylinder 26.The basis material 27 of electrode bar is that an external diameter is about the oxygen-free copper that 10mm, length are about 10mm.
Then molded 28 of sintered body is put on the opening of the basis material that is used for the installing electrodes rod 27 of cylinder 26 and is fixed on this opening.To after heating, form contact chip, and make for molded 28 by copper-chromium sintered body by infiltrating method.Form at the major part external diameter for molded 28 and be about 15mm, be about 10mm at the smaller portions external diameter, and thickness is about 10mm.
A kind of method of being made by the Cu-Cr sintered body of molded 28 that is used to make is hereinafter described.Grind by machinery that aluminium-deoxidized chromium piece prepares chromium powder in melting process, granular size is adjusted to and is not more than 74 μ m.Prepare the copper powder that particle diameter is not more than 44 μ m by electrolysis.Measure chromium powder and copper powder, making its mass ratio is 55Cu-Cr, and mixes with the V-type blender.
This mixture in oxygen-free environment at 1tonf/cm
2(98MPa) extrusion forming under the pressure, and in nonoxidizing atmosphere, under about 1,000 ℃ temperature, heat then, this temperature is lower than the fusing point of copper.This moulding process is called sintering process in powder metallurgy.
The former fecula of chromium is the chromium powder of above-mentioned deoxidation.Its reason is that the contact material that is used in the vacuum valve sends all gases molecule, mainly is oxygen when the electric arc that connection and disengagement owing to contact produce makes the contact fusing.The gas that discharges is easy to increase the pressure in the vacuum tank.Thereby, use the deoxidation chromium powder to be intended to making oxygen content minimum.
About copper powder,, also can use atomized copper powder although obtain by electrolysis with copper powder in this example no problemly.
Molded 28 is being put into after cylinder 26 is used on the opening of basis material 27 of installing electrodes rod, with infiltration material 29, the oxygen-free copper block of about 10mm of external diameter and the about 8mm of length is placed on the top surface of molded 28 (CuCr sintered body).Hole in the filling porous CuCr sintered body of infiltration material, thus contact chip formed.
As mentioned above, the basis material 27 of electrode bar and infiltration material 29 are by identical materials, and a deoxidized cooper constitutes.Cylinder 26 can be made by any material that fusing point is higher than the fusing point (being the fusing point of copper in the situation of example 1) of the fusing point of basis material 27 of electrode bar and infiltration material 29.In example 1, the basis material of cylinder 26 is austenitic stainless steels.
Selecting austenitic stainless steel for the basis material of cylinder 26 is because austenitic stainless steel has good corrosion resistance, and anticorrosive object is provided and need not any special surface treatment in afterwards the step.
Therefore, the assembly 30 that forms shown in Fig. 1 (a) comprises the basis material 27 of cylinder 26, electrode bar, molded 28 and infiltration material 29.
Then, in nitrogen atmosphere at 1,200 ℃ of following assembly 30 of the above-mentioned setting of heating, with the basis material 27 (copper billet) of consumable electrode rod be placed on the molded 28 infiltration material 29 on (CuCr sintered body).
Be placed on molded 28 infiltration material 29 (copper billet) fusing and filling porous molded 28 (CuCr sintered body) interior hole on (CuCr sintered body), this technology is called infiltration technology in powder metallurgy.The remainder of infiltration material 29 falls into cylinder 26 basis materials 27 (copper billet) interior and the electrode bar in being placed on cylinder 26 in cylinder 26 and solidifies.
Fig. 1 (b) be the heating that obtains as mentioned above and solidify after the cutaway view of structure of assembly 31.Shown in Fig. 1 (b), the infiltration material 29 shown in Fig. 1 (a) is from the position complete obiteration on molded 28.But the contact chip 32 in the fine finishining front construction forms a part that comprises the infiltration material 29 on molded 28 and the cylinder 26.In cylinder 26, electrode bar 33 is formed by the remainder in spaces in the complete filling cylinder 26 of the basis material 27 of electrode bar and infiltration material 29.
Observe the microstructure of the cross section of the assembly 31 after heating and solidifying.Observe, link contact 32 with the interface 34 of cylinder 26 and by fusion in cylinder 26 and the binding cylinder 26 that solidify to form and 35 places, interface of electrode bar 33 in fusing, copper infiltrates in cylinder 26 grain boundaries, and corresponding each several part links at the interface securely at these.
In the interior section 36 of contact chip 32, the hole in the piece of previous porous by infiltration material (copper) complete filling to reinforce whole contact chip.37 places, interface between contact chip 32 and electrode bar 33, the remainder of infiltration material 29 forms whole and mutually continuous with the infiltration material 29 in the contact chip 32 with electrode bar 33.Therefore, also can guarantee firm binding at the interface at this.
Fig. 2 is the cutaway view that the structure of the assembly 31 after fine finishining is heated afterwards and solidified is shown.As shown in Figure 2, contact chip 32 is located into fillet in the top surface neighboring with chamfering, and fillet for example forms the structure of the contact chip that is suitable for vacuum valve.Part at cylinder 26 is processed to form the pin thread that is used to be connected to the peripheral operation device to it, stays another part and is used to reinforce contact chip 32 and electrode bar 33.
In the first half, cutting cylinder body 26, stay the flange 38 that is used to reinforce contact chip 32 around contact chip 32, all the other barrel cuttings of cylinder 26 these the first half reach 2/3 of thickness, stay 1/3 thickness and form hollow cylinder part 39 to reinforce electrode bar 33.
In the latter half adjacent of cylinder 26, cut bottom 25 among Fig. 1 (a) and 1 (b) to expose the bottom of electrode bar 33 with hollow circle tube part 39.This latter half of cylinder 26 is formed for being connected to the pin thread 41 of peripheral operation device after cutting bottom 25.
Can before heating process, form pin thread 41.When after heating process, forming pin thread 41, can after forming pin thread 41, cut bottom 25, or can after cutting bottom 25, form pin thread 41.
Like this, just can make contact structures 42.These contact structures on its function corresponding to movable contact 5 shown in Figure 4.In addition, in these contact structures, contact chip 32 is attached firmly to electrode bar 33 and is used to reinforce the flange 38 of contact chip, and electrode bar 33 is attached firmly to hollow circle tube part 39 and pin thread 41, and latter two part is used to reinforce electrode bar 33.
In this example, in heating process, make whole contact structures form one, exempted soldering processes by infiltrating method.Therefore, the brazing layer material is in the footing that relatively poor wettable austenitic stainless steel can be used on contact chip 32 (flange 38), is used for the footing (hollow circle tube part 39) of electrode bar 33 and pin thread 41 (part of remaining cylinder 26 after the cutting processing) and any surface treatment that need be such as nickel plating, utilize the good corrosion resistance of austenitic stainless steel.
Although this case description uses the base metal material of CuCr alloy as contact chip 32, contact chip also can comprise one or both in copper and the silver, and is selected from the metal of chromium, tungsten, molybdenum, tantalum and the carbide of these metals.
Contact chip also can comprise the low melting point element such as tellurium, bismuth and lead.
In this example of the method for the contact structures of above-mentioned manufacturing vacuum valve, cylinder, electrode bar and contact chip are by forming one with heating when being used to form the infiltration of contact chip, and pin thread is formed on the cylinder.So, do not hinder the suitable relative size of after heating and curing, guaranteeing according to cylinder in the part of each assembling that does not have accurate relative size before the heating process.
Therefore, method of the present invention allows the coarse and release soldering processes of size of assembled part.Therefore, simplified manufacturing step.Realize between part at the interface firm binding by infiltrating method, and need not solid phase link in needed large-scale pressure apparatus.Therefore, can provide cheap contact.
[example 2]
Fig. 3 (a) and 3 (b) illustrate the cutaway view of example that in the method for example 2 of the contact structures of making vacuum valve two form the assembly of one; And Fig. 3 (c) is the cutaway view that the structure of the contact structures of finishing is shown.The contact structures that the method for the contact structures of the vacuum valve by making example 2 is made are corresponding to the fixed contact therefor 7 of vacuum valve shown in Figure 4.
Except on structure and the size some different, it is identical with material in the example shown in Fig. 1 (a) to be used in this example 2 basis material of the each several part in the method for contact structures of manufacturing vacuum valve.The manufacture method of each several part is also with identical about the described method of Fig. 1 (a).
Thereby, omit the material of each several part and the explanation of manufacture method at this, the order of manufacturing process is only described.It is identical with the Reference numeral among Fig. 1 (a), 1 (b) and 2 to have the Reference numeral of the part identical with partial function among Fig. 1 (a), 1 (b) and 2 in Fig. 3 (a), 3 (b) and 3 (c).
At first, prepare the cylinder 26 with cup-like structure shown in Fig. 3 (a) or 3 (b), 25 center has inwardly outstanding jut 45 to cylinder in the bottom.Fig. 3 (a) illustrates cylinder 26, and this cylinder comprises jut 45, bottom 25 and hollow circle tube part 39, and they are in aggregates at the initial condition structure.On the other hand, Fig. 3 (b) illustrates the cylinder 26 with separate section 46, and separate section 46 comprises jut 45 and base section 25.Separate section 46 separates the bottom surface of making and being attached to hollow circle tube part 39 with welding portion 47 with hollow circle tube part 39.
Subsequently, be placed on the basis material 27 of electrode bar on the jut 45 and be installed in the cylinder 26.Then molded 28 of sintered body is put on the opening of the basis material that is used for the installing electrodes rod 27 of cylinder 26 and is fixed on this opening.Then, infiltration material 29 is placed on molded 28 the top surface.
Therefore, the assembly 43 or 44 of formation comprises the basis material 27 of cylinder 26, electrode bar, molded 28 and infiltration material 29.After this, in nonoxidizing atmosphere (being nitrogen atmosphere in this example), under 1,200 ℃ of temperature, assembly 43 or 44 is heated by powder metallurgic method.
This heating process makes basis material 27 fusings of electrode bars in infiltration material 29 on molded 28 and the cylinder 26.Infiltration material 29 filling porous molded 28 interior hole and remaining infiltration material 29 fall in the cylinder 26.
The basis material 27 of remaining infiltration material 29 and electrode bar becomes an integral body and is filled in jut 45 cylinder 26 on every side in cylinder 26, and becomes solid equably.
The thickness that forms one and cylinder 26 except the basis material 27 of jut 45 and electrode bar in cylinder 26 is than being used to form the needed thin thickness of pin thread and being exactly the thickness of hollow circle tube part 39, fusing and the structure that solidifies the back assembly be heating and curing shown in Fig. 1 (b) after body 31 identical.
Although Fig. 3 (c) illustrates the structure after the fine finishining, but shown in Fig. 3 (c), infiltration material 29 in the each several part of the contact structures of fusing and infiltration forms contact chips 32, contact chip 32 has the inside of reinforcement on the top of cylinder 26, and the top (molded standing part) by being penetrated into cylinder 26 forms one with the top of contact chip 32 and cylinder 26.
In addition, the infiltration material 29 of fusing fall in the cylinder 26 and cylinder 26 in and the basis material 27 of electrode bar become an integral body comprises jut 45 with formation electrode bar 33.Electrode bar 33 is penetrated into cylinder 26 inwalls at its circumferential surface place, makes electrode bar 33 and cylinder 26 form one.
After this, the bottom 25 that cuts cylinder 26 forms negative thread 48 then to expose around the basal surface 33 of the electrode bar 33 of the bottom of jut 45 in jut 45.
Can before heating process, form negative thread 48.When after heating, forming negative thread, can after forming negative thread 48, cut bottom 25, or can after cutting bottom 25, form negative thread 48.
Therefore, finish on its function contact structures 49 corresponding to fixed contact therefor shown in Figure 47.In contact structures 49, realized following firm binding: between contact chip 32 and the electrode bar 33; Between the hollow circle tube part 39 of contact chip 32 and cylinder 26, hollow circle tube partly is the footing that is used for electrode bar 33; Between hollow circle tube part 39 and the electrode bar 33 and between electrode bar 33 and the negative thread 48.
In this external this example 2, make whole contact structures form one by heating, thereby exempt soldering processes based on infiltrating method.Therefore, the brazing layer material is relatively poor wettable austenitic stainless steel can be used for constituting the cylinder 26 of reinforcing electrode 33, and constitute the negative thread that processes from jut 45, and need not such as the surface treatment of nickel plating and utilize the good corrosion resistance of austenitic stainless steel.
In this example 2 of the method for the contact structures of making above-mentioned vacuum valve, cylinder, electrode bar and contact chip that the bottom has jut form one by heating simultaneously with the infiltration that is used to form contact chip, and negative thread is formed on the jut.So, do not hinder the suitable relative size of after heating and curing, guaranteeing according to cylinder in the part that does not have each assembling of accurate relative size before the heating process.
Therefore, method of the present invention allows the coarse and release soldering processes of size of assembled part.Therefore, simplified manufacturing step.Realize between part at the interface firm binding by infiltrating method, and need not solid phase link in needed large-scale pressure apparatus.Therefore, can provide cheap contact.
The contact structures 42 of hypothesis instance 1 are corresponding to the movable contact of vacuum valve for above-mentioned specification, and the contact structures 49 of example 2 are corresponding to the fixed contact therefor of vacuum valve.But application of the present invention is not limited to this situation, but the contact structures 42 of example 1 can be used as fixed contact therefor, and the contact structures 48 of example 2 can be used as movable contact.In addition, movable contact and fixed contact therefor all can be made of the contact structures 42 of example 1 or the contact structures 49 of example 2.
Claims (14)
1. contact structures that are used to connect/cut off the vacuum valve of electric current, described contact structures comprise:
Contact chip;
Electrode bar, described electrode bar is connected to described contact chip; And
Cylinder, described cylinder support described contact chip and described electrode bar, and have pin thread, and described pin thread is formed on the periphery of an end opposite with the other end that supports described contact chip,
Wherein described contact chip, described electrode bar and described cylinder are formed one.
2. contact structures that are used to connect/cut off the vacuum valve of electric current, described contact structures comprise:
Contact chip;
Electrode bar, described electrode bar is connected to described contact chip;
Cylinder, described cylinder support described contact chip and described electrode bar; And
Negative thread, described negative thread is formed in the described electrode bar at an end place opposite with the other end of the described contact chip of supporting of described cylinder,
Wherein described contact chip, described electrode bar, described cylinder and described negative thread are formed one.
3. the contact structures of vacuum valve as claimed in claim 1 or 2 is characterized in that, but described contact chip is fixed contact piece or is arranged to the moving contacting plate that can be connected and throw off with described fixed contact piece.
4. the contact structures of vacuum valve as claimed in claim 1 or 2 is characterized in that, described integratedly undertaken by infiltrating method.
5. the contact structures of vacuum valve as claimed in claim 1 or 2 is characterized in that, described contact chip comprises one or both in copper and the silver, and the material that is selected from the carbide of chromium, tungsten, molybdenum, tantalum and these materials.
6. the contact structures of vacuum valve as claimed in claim 5 is characterized in that, described contact chip comprises at least a element that is selected from tellurium, bismuth and lead.
7. the contact structures of vacuum valve as claimed in claim 1 or 2 is characterized in that, the basis material of described cylinder, the basis material of described cylinder with described pin thread and the basis material of described negative thread are austenitic stainless steels.
8. method of making the contact structures of vacuum valve may further comprise the steps:
(1) prepare the cylinder with cup-like structure, described cylinder has the bottom;
(2) basis material with electrode bar is installed in the described cylinder;
(3) molded of sintered body is fixed on the opening part of described basis material that is used to install described electrode bar of described cylinder;
(4) the infiltration material is placed on the described molded top surface;
Above-mentioned four steps constitute the assembly of the described basis material that comprises described cylinder, described electrode bar, described molded and described infiltration material together;
(5) heat the described assembly that comprises described infiltration material by powder metallurgic method in nonoxidizing atmosphere, described heating steps may further comprise the steps:
(i) form contact chip by described infiltration material being penetrated in described molded and at the place, top of described cylinder,
(ii) by described infiltration material being penetrated into being used for fixing of described cylinder described molded position and one is formed on described contact chip and described cylinder top,
(iii) in described cylinder, form described electrode bar, and the described basis material of described cylinder and described electrode bar is formed one by described infiltration material being penetrated in the described cylinder, and
The (iv) inwall of outer surface by described infiltration material being penetrated into described electrode bar and described cylinder and described electrode bar and described cylinder are formed one;
(6) cut the described bottom of described cylinder to expose the basal surface of described electrode bar; And
(7) after above-mentioned steps, on the periphery at the opposite end place of the other end with forming described contact chip of described cylinder, form pin thread.
9. method of making the contact structures of vacuum valve may further comprise the steps:
(1) prepare the cylinder with cup-like structure, described cylinder has inwardly outstanding jut in the center of the bottom of described cylinder;
(2) be put on the described jut by basis material and the described basis material of described electrode bar is installed in the described cylinder electrode bar;
(3) molded of sintered body is fixed on the opening part of basis material that is used to install described electrode bar of described cylinder;
(4) the infiltration material is placed on the described molded top surface;
Above-mentioned four steps constitute the assembly of the described basis material that comprises described cylinder, described electrode bar, described molded and described infiltration material together;
(5) heat the described assembly that comprises described infiltration material by powder metallurgic method in nonoxidizing atmosphere, described heating steps may further comprise the steps:
(i) form contact chip by described infiltration material being penetrated in described molded and at the place, top of described cylinder,
(ii) by described infiltration material being penetrated into being used for fixing of described cylinder described molded position and one is formed on described contact chip and described cylinder top,
(iii) in described cylinder, form the described electrode bar that surrounds described jut, and the described basis material of described cylinder and described electrode bar is formed one by described infiltration material being penetrated in the described cylinder, and
The (iv) inwall of outer surface by described infiltration material being penetrated into described electrode bar and described cylinder and described electrode bar and described cylinder are formed one;
(6) cut the bottom of described cylinder to expose the basal surface of the described electrode bar that forms around the bottom of described jut; And
(7) after above-mentioned steps, on described jut, form negative thread.
10. as the method for the contact structures of manufacturing vacuum valve as described in claim 8 or 9, it is characterized in that the basis material of described cylinder, the basis material of described cylinder with described pin thread and the basis material of described negative thread are austenitic stainless steels.
11. make the method for the contact structures of vacuum valve as claimed in claim 8 or 9, it is characterized in that the described basis material of described electrode bar and described infiltration material are made of copper basically.
12. the method as the contact structures that are used to make vacuum valve as described in claim 8 or 9 is characterized in that, described molded comprises in copper and the silver one or both and the material that is selected from the carbide of chromium, tungsten, molybdenum, tantalum and these materials.
13. the method as the contact structures of manufacturing vacuum valve as described in the claim 12 is characterized in that, described molded comprises and is selected from tellurium, bismuth and plumbous at least a element.
14. the method as the contact structures of manufacturing vacuum valve as described in claim 8 or 9 is characterized in that, but described contact chip is fixed contact piece or is arranged to the moving contacting plate that can be connected and throw off with described fixed contact piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-257407 | 2008-10-02 | ||
| JP2008257407A JP4770903B2 (en) | 2008-10-02 | 2008-10-02 | Contact structure of vacuum valve and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101714478A true CN101714478A (en) | 2010-05-26 |
| CN101714478B CN101714478B (en) | 2014-07-09 |
Family
ID=41821500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910205001.9A Active CN101714478B (en) | 2008-10-02 | 2009-09-29 | A contact structure of a vacuum valve and manufacture method thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4770903B2 (en) |
| KR (1) | KR101114082B1 (en) |
| CN (1) | CN101714478B (en) |
| DE (1) | DE102009043615B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108885958A (en) * | 2016-03-29 | 2018-11-23 | 三菱电机株式会社 | Manufacturing method, contact member and the vacuum valve of contact member |
| CN109478481A (en) * | 2016-07-20 | 2019-03-15 | 西门子股份公司 | The contact rod of reinforcing |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101115639B1 (en) * | 2010-10-18 | 2012-02-15 | 엘에스산전 주식회사 | Contact assembly for vacuum interrupter |
| AT13815U3 (en) * | 2014-02-21 | 2015-05-15 | Plansee Powertech Ag | Contact pin and pipe contact and method of manufacture |
| CN104409227A (en) * | 2014-11-10 | 2015-03-11 | 山东泰开高压开关有限公司 | Arc contact processed by various materials for high-voltage switch |
| US10923303B2 (en) | 2016-04-12 | 2021-02-16 | Mitsubishi Electric Corporation | Vacuum circuit breaker, gas insulated switchgear and air insulated switchgear mounted with the vacuum circuit breaker |
| US11967471B2 (en) | 2019-08-27 | 2024-04-23 | Mitsubishi Electric Corporation | Electrical contact and vacuum switch tube comprising electrical contact |
| RU207503U1 (en) * | 2021-07-11 | 2021-10-29 | Общество С Ограниченной Ответственностью "Электро Пром Торг" | ARC EXTINGUISHING CHAMBER |
| RU210237U1 (en) * | 2022-01-07 | 2022-04-01 | Елена Евгеньевна Кашичкина | Vacuum arc chute |
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| US5594224A (en) * | 1993-12-24 | 1997-01-14 | Hitachi, Ltd. | Vacuum circuit interrupter |
| US5852266A (en) * | 1993-07-14 | 1998-12-22 | Hitachi, Ltd. | Vacuum circuit breaker as well as vacuum valve and electric contact used in same |
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| CN101236857A (en) * | 2007-01-31 | 2008-08-06 | 开关工艺欧洲有限公司 | Improved method for making vacuum switch device |
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| US4490784A (en) * | 1982-04-21 | 1984-12-25 | Ives David C | High-speed data transfer unit for digital data processing system |
| JPS5916037U (en) * | 1982-07-22 | 1984-01-31 | 株式会社明電舎 | vacuum interrupter |
| JPS6380426A (en) * | 1986-09-24 | 1988-04-11 | 株式会社明電舎 | Vacuum interruptor |
| JPH0330225A (en) * | 1989-06-28 | 1991-02-08 | Mitsubishi Electric Corp | Vacuum switch tube |
| TW265452B (en) * | 1994-04-11 | 1995-12-11 | Hitachi Seisakusyo Kk | |
| JPH07335092A (en) * | 1994-04-11 | 1995-12-22 | Hitachi Ltd | Vacuum circuit breaker, and vacuum valve and electrical contact for vacuum circuit breaker, and manufacture thereof |
| JP2008257407A (en) | 2007-04-04 | 2008-10-23 | Fujitsu Microelectronics Ltd | Logarithmic computing unit and logarithmic computing method |
-
2008
- 2008-10-02 JP JP2008257407A patent/JP4770903B2/en not_active Expired - Fee Related
-
2009
- 2009-09-02 KR KR1020090082372A patent/KR101114082B1/en active IP Right Grant
- 2009-09-29 CN CN200910205001.9A patent/CN101714478B/en active Active
- 2009-09-29 DE DE102009043615A patent/DE102009043615B4/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5852266A (en) * | 1993-07-14 | 1998-12-22 | Hitachi, Ltd. | Vacuum circuit breaker as well as vacuum valve and electric contact used in same |
| US5594224A (en) * | 1993-12-24 | 1997-01-14 | Hitachi, Ltd. | Vacuum circuit interrupter |
| CN1343999A (en) * | 2000-07-14 | 2002-04-10 | 尹顿公司 | Method and apparatus for assemlbing steam baffle into vacuum current breaker and vacuum current breaker set with same |
| CN101236857A (en) * | 2007-01-31 | 2008-08-06 | 开关工艺欧洲有限公司 | Improved method for making vacuum switch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108885958A (en) * | 2016-03-29 | 2018-11-23 | 三菱电机株式会社 | Manufacturing method, contact member and the vacuum valve of contact member |
| CN109478481A (en) * | 2016-07-20 | 2019-03-15 | 西门子股份公司 | The contact rod of reinforcing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101714478B (en) | 2014-07-09 |
| DE102009043615B4 (en) | 2011-08-25 |
| JP2010086898A (en) | 2010-04-15 |
| JP4770903B2 (en) | 2011-09-14 |
| KR101114082B1 (en) | 2012-03-14 |
| KR20100038043A (en) | 2010-04-12 |
| DE102009043615A1 (en) | 2010-04-15 |
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Address after: Saitama Prefecture, Japan Patentee after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Tokyo Patentee before: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. |