CN101714478B - 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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- CN101714478B CN101714478B CN200910205001.9A CN200910205001A CN101714478B CN 101714478 B CN101714478 B CN 101714478B CN 200910205001 A CN200910205001 A CN 200910205001A CN 101714478 B CN101714478 B CN 101714478B
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- contact chip
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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
- 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
- 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
No. 2008-257407th, the Japanese patent application of the application based on submitting on October 2nd, 2008, and require its priority, the content of this application is included in herein with way of reference.
Background of invention
1. technical field
The present invention relates to a kind of for connecting/cut off the vacuum valve contact structures of electric current in 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 for guaranteeing electric insulation.The two ends of insulated column 1 are provided with plating 2a, the 2b that can carry out soldering.The headboard being made of metal and bottom end plate 3a, 3b are attached to respectively the surface of plating 2a, 2b to form vacuum tank 4.
The movable electrode rod 6 of movable contact 5 and the fixed electrode rod 8 of fixed contact therefor 7 arrange through headboard 3a and the bottom end plate 3b of vacuum tank 4 respectively.
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 arrives bellows 9 and lid 11 through the sealed bottom plate central link of bellows, to be movably fixed on upright position by bellows.
Movable electrode rod 6 higher than being projected into vacuum tank 4 outsides by the part of bellows 9 retaining parts.On the top of the ledge of movable electrode rod 6, with brazing layer 13 attached pin thread 12 regularly, movable electrode rod 6 is connected to peripheral operation device (not shown).
In the inner contrary with the attached outer end that has a pin thread 12 on it of movable electrode rod 6, can moving contacting plate attachment portion 14 be formed as an entirety with movable electrode rod 6, can moving contacting plate attachment portion 14 there is the transverse plane wider than the inner of electrode bar.On can the end surfaces of moving contacting plate attachment portion 14, by brazing layer 16, attached regularly have can moving contacting plate 15.
Therefore, movable contact 5 comprises: can moving contacting plate 15; Can moving contacting plate attachment portion 14, on it, by brazing layer 16, attached regularly have can moving contacting plate 15; Movable electrode rod 6, its with can moving contacting plate attachment portion 14 be an entirety; 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 (another in two electric contact pieces of vacuum valve) of fixed contact therefor 7 links and is fixed to the circumference of the central opening of bottom end plate 3b in its outer end.In 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 contrary 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 is formed as entirety with fixed electrode rod 8, and fixed contact piece attachment portion 18 has the transverse plane wider than the inner of electrode bar 8.On the transverse plane of fixed contact piece attachment portion 18, there is a fixed contact piece 19 by brazing layer 21 is attached regularly.
Therefore, fixed contact therefor 7 comprises: can 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 entirety; And negative thread 17, it inserts and is attached to regularly the outer end of fixed electrode rod 8.
Having shown in Fig. 4 and as mentioned above in the vacuum valve of structure, movable electrode rod 6 is connected to peripheral operation device (not shown) by pin thread 12, and be fixed on can being connected to fixed contact piece 19 and throwing off with fixed contact piece 19 by moving contacting plate 15 of movable electrode rod 6 on extending bellows 9, keep the hermetic seal of vacuum tank 4.
In the time that electric current flows through vacuum valve, can be connected to fixed contact piece 19 by moving contacting plate 15.In the situation that having any problem, operator (not shown) is upwards pulled out to headboard 3a top according to external signal by the outer end of movable electrode rod 6.So, be arranged on regularly can throwing off with fixed contact piece 19 by moving contacting plate 15 of movable electrode rod 6 the inners, and keep the hermetic seal of vacuum tank 4, thereby unclamp contact.
When can moving contacting plate 15 while throwing off with fixed contact piece 19, between contact chip, produce electric arc and launch spark.In order to prevent that the inwall of insulated column 1 is subject to the pollution of spark, can moving contacting plate 15 and contact chip position and insulated column 1 inwall of fixed contact piece 19 between centre be provided with arc shield part 22, 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.Can moving contacting plate 15 link fixed contact piece 19 and fixed electrode rod 8, link movable electrode excellent 6 and for being connected to the pin thread 12 of peripheral operation device and linking fixed electrode excellent 8 and assemble the contact in this structure for the negative thread 17 that is connected to outside cloth line terminals with brazing layer 20 with brazing layer 13 with movable electrode rod 6, with brazing layer 21 by linking with brazing layer 16.
Therefore the preparation that, the assembling of conventional vacuum valve need to bother is to form brazing layer on the surface carrying out soldering.In addition, comprise with movable electrode rod 6 and for being connected to the negative thread 17 of outside cloth line terminals and the brazing operation of fixed electrode rod 8 difficult problem that must guarantee to solve the relative portion size of optimum between movable electrode rod 6 and pin thread 12 and between fixed electrode rod 8 and negative thread 17 for the pin thread that is connected to operator.
In the time that the material that requires pin thread 12 has corrosion resistance, need to use austenitic stainless steel.But austenitic stainless steel demonstrates the wettability poor to brazing material.Therefore, use the surface preparation that the screw thread of austenitic stainless steel need to be such as nickel plating.
For fear of the preliminary treatment of the various troubles for soldering, patent documentation 1 has disclosed a kind of vacuum circuit-breaker, wherein links by solid phase or high temperature insostatic pressing (HIP) (HIP) is integrally formed electrode piece and current-carrying part.
[patent documentation 1 :]
No. H07-335092nd, Japanese unexamined Patent Application Publication
But solid phase link meeting cannot 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 larger forcing press, therefore comprises the problem of large-scale technique.
Although high temperature insostatic pressing (HIP) utilization links high link density and gives enough boundary strengths than solid phase, high temperature insostatic pressing (HIP) also comprises the problem of the operation of the trouble that uses gases at high pressure device.
Summary of the invention
Consider the problems referred to above in routine techniques, the object of this invention is to provide a kind of contact structures of vacuum valve and the method for this structure of manufacture, contact chip, electrode bar and form one and without pressurization, easily guarantee the relative portion size of optimization between screw thread and electrode bar by straightforward procedure for the screw thread that is connected to peripheral operation device or wiring in this structure.
For connecting/cut off the contact structures of 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 there is pin thread, this pin thread is formed in the periphery of one end contrary with the other end that supports contact chip, wherein contact chip, electrode bar and cylinder is formed to one.
For connecting/cut off the contact structures of 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 electrode bar at one end place contrary with the other end with supporting contact chip of cylinder, wherein contact chip, electrode bar, cylinder and negative thread is formed to one.
Manufacture a method for the contact structures of vacuum valve, the method is a third aspect of the present invention, comprises the following steps: (1) preparation has the cylinder of cup-like structure, and this cylinder has bottom, (2) basis material of electrode bar is installed in cylinder, (3) by molded of sintered body opening part that is fixed on the basis material for installing electrodes rod of cylinder, (4) infiltration material is placed on the top surface of molded, above-mentioned four steps form together and comprise the basis material, molded of cylinder, electrode bar and the assembly of infiltration material, (5) in nonoxidizing atmosphere, heat the assembly that comprises infiltration material by powder metallurgic method, this heating steps comprises the following steps: (i) form contact chip at the top place of cylinder by infiltration material being penetrated in molded, (ii) by infiltration material being penetrated into the position for fixed die clamp dog of cylinder, contact chip and cylinder top are formed to one, (iii) be penetrated in cylinder by infiltration material and in cylinder, and the basis material of cylinder and electrode bar is formed to one, thereby formation electrode bar, and (iv) by infiltration material being penetrated into the outer surface of electrode bar and the inwall of cylinder, electrode bar and cylinder are formed to one, (6) bottom that cuts cylinder is to expose the basal surface of electrode bar, and (7) form pin thread after above-mentioned steps in the periphery of cylinder one end contrary with the other end that forms contact.
A kind of method of the contact structures of manufacturing vacuum valve, the method is a fourth aspect of the present invention, comprise the following steps: (1) preparation has the cylinder of cup-like structure, described cylinder has inwardly outstanding jut in the center of the bottom of cylinder, (2) by the basis material of electrode bar being put on jut and the basis material of electrode bar is installed in cylinder, (3) by molded of sintered body opening part that is fixed on the basis material for installing electrodes rod of cylinder, (4) infiltration material is placed on the top surface of molded, above-mentioned four steps form together and comprise the basis material, molded of cylinder, electrode bar and the assembly of infiltration material, (5) in nonoxidizing atmosphere, heat the assembly that comprises infiltration material by powder metallurgic method, this heating steps comprises the following steps: (i) form contact chip at the top place of cylinder by infiltration material being penetrated in molded, (ii) by infiltration material being penetrated into the position for fixed die clamp dog of cylinder, contact chip and cylinder top are formed to one, (iii) by infiltration material being penetrated in cylinder and in cylinder, and the material of cylinder and electrode bar is formed to one, thereby form the electrode bar that surrounds jut, and (iv) by infiltration material being penetrated into the outer surface of electrode bar and the inwall of cylinder, electrode bar and cylinder are formed to one, (6) bottom that cuts cylinder is to expose the basal surface of the electrode bar forming around the bottom of jut, and (7) form negative thread after above-mentioned steps on jut.
The invention provides a kind of contact structures of vacuum valve and the method for this structure of manufacture, contact chip, electrode bar and form one and without pressurization, easily guarantee the relative portion size of optimization between screw thread and electrode bar by straightforward procedure for the screw thread that is connected to peripheral operation device or wiring in this structure.
Brief description of the drawings
Below describe with reference to the accompanying drawings some preferred embodiments according to the embodiment of the present invention in detail.
Fig. 1 (a) and 1 (b) are this cutaway views of shape all-in-one-piece process of method that the example 1 of the contact structures of manufacturing vacuum valve is shown;
Fig. 2 illustrates in the method for example 1 of the contact structures of manufacturing 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) are the cutaway views that the example of two shape all-in-one-piece assemblies in the method for example 2 of the contact structures of manufacturing vacuum valve is shown;
Fig. 3 (c) is the cutaway view of the structure of the contact structures that illustrated; 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: movable electrode rod
7: fixed contact therefor
8: fixed electrode rod
9: bellows
11: lid
12: pin thread
13: brazing layer
14: can moving contacting plate attachment portion
15: can moving contacting plate
16: brazing layer
17: negative thread
18: fixed contact piece attachment portion
19: fixed contact piece
20,21: brazing layer
22: arc shield part
25: base section
26: cylinder
27: the basis material of electrode bar
28: molded
29: 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 cylinder
35: the interface between cylinder and electrode bar
36: contact chip inside
37: the interface between contact chip and electrode bar
38: flange
39: 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 shape all-in-one-piece process in the method for example 1 of the contact structures of manufacturing vacuum valve is shown.By manufacturing contact structures that the method for contact structures of vacuum valve of example 1 manufactures corresponding to the movable contact 5 of vacuum valve shown in Fig. 4.
First, in the method for the contact structures of the manufacture vacuum valve of example 1, prepare the cylinder 26 of cup-like structure as shown in Fig. 1 (a), this cup-like structure has bottom 25.It is that 16mm, internal diameter are the container of 10mm and the degree of depth cup-like structure that is 25mm that cylinder 26 is made external diameter by austenitic stainless steel (Japanese Industrial Standards coding SUS304) bar.
The basis material 27 of electrode bar is arranged 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 by the opening of molded 28 of the sintered body basis material 27 for installing electrodes rod that is put into cylinder 26 and be fixed on this opening.To after heating, form contact chip by infiltrating method, and be made by copper-chromium sintered body for molded 28.Be formed as for molded 28 being about 15mm at major part external diameter, be about 10mm at smaller portions external diameter, and thickness be about 10mm.
A kind of method of molded 28 for the manufacture of being made up of Cu-Cr sintered body is below described.Grind aluminium-deoxidized chromium piece in melting process by machinery and prepare chromium powder, granular size is adjusted to and is not more than 74 μ m.Prepare by electrolysis the copper powder that particle diameter is not more than 44 μ m.Measure chromium powder and copper powder, making its mass ratio is 55Cu-Cr, and mixes with V-type blender.
This mixture in oxygen-free environment at 1tonf/cm
2(98MPa) extrusion forming under pressure, and then in nonoxidizing atmosphere, at the temperature of approximately 1,000 DEG C, heat, 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 being used in vacuum valve sends various gas molecules, is mainly oxygen in the time that the electric arc of the connection due to contact and disengagement generation makes contact fusing.The gas discharging is easy to increase the pressure in vacuum tank.Thereby, use deoxidation chromium powder to be intended to making oxygen content minimum.
About copper powder, although obtain by electrolysis with copper powder in this example, also can use atomized copper powder no problemly.
Molded 28 is put into cylinder 26 for the opening of the basis material 27 of installing electrodes rod on after, by infiltration material 29, the oxygen-free copper block of the 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 material, and a deoxidized cooper forms.Cylinder 26 can be made up higher than any material of the fusing point of the basis material 27 of electrode bar and the fusing point of infiltration material 29 (being the fusing point of copper in the situation of example 1) of fusing point.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 in step afterwards without any special surface treatment.
Therefore the assembly 30, forming as 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 DEG C, heat the assembly 30 of above-mentioned setting, 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 hole in infiltration material 29 (copper billet) fusing filling porous molded 28 (the CuCr sintered body) on (CuCr sintered body), this technique is called infiltration technique in powder metallurgy.The remainder of infiltration material 29 falls in cylinder 26 and curing with together with the basis material 27 (copper billet) of the electrode bar in being placed on cylinder 26 cylinder 26 in.
Fig. 1 (b) be the heating that obtains as mentioned above and solidify after the cutaway view of structure of assembly 31.As shown in Fig. 1 (b), the infiltration material 29 shown in Fig. 1 (a) disappears completely from the position molded 28.But the contact chip 32 in fine finishining front construction is formed as comprising a part for the infiltration material 29 on molded 28 and cylinder 26.In cylinder 26, electrode bar 33 is formed by the basis material 27 of electrode bar and the remainder of filling cylinder 26 interior spaces completely of infiltration material 29.
Observe the microstructure of the cross section of the assembly 31 after heating and solidifying.Observe, link contact 32 and the interface 34 of cylinder 26 and by 35 places, interface with electrode bar 33 at the interior melting of cylinder 26 and the link cylinder 26 that solidify to form in fusing, copper infiltrates in cylinder 26 grain boundaries, and corresponding each several part links securely in these interfaces.
In the interior section 36 of contact chip 32, previously whole contact chip was filled to reinforce completely by infiltration material (copper) in the hole in the piece of porous.37 places, interface between contact chip 32 and electrode bar 33, the remainder of infiltration material 29 forms entirety mutually continuous with the infiltration material 29 in contact chip 32 with electrode bar 33.Therefore, also can guarantee firm link in this interface.
Fig. 2 is the cutaway view that the structure of the assembly 31 after fine finishining is heated and solidified is afterwards shown.As shown in Figure 2, contact chip 32 becomes fillet at the top surface neighboring place with chamfering, and fillet for example forms the structure of the contact chip that is suitable for vacuum valve.A part at cylinder 26 is processed to form the pin thread for being connected to peripheral operation device to it, leaves another part for reinforcing contact chip 32 and electrode bar 33.
In the first half, cutting cylinder body 26, leave the flange 38 for reinforcing contact chip 32 around contact chip 32, all the other barrel cuttings of cylinder 26 these the first half reach 2/3 of thickness, leave 1/3 thickness and form hollow cylinder part 39 to reinforce electrode bar 33.
In the latter half adjacent with hollow circle tube part 39 of cylinder 26, cut bottom 25 in Fig. 1 (a) and 1 (b) to expose the bottom of electrode bar 33.This latter half of cylinder 26, after cutting bottom 25, is formed for being connected to the pin thread 41 of peripheral operation device.
Can before heating process, form pin thread 41.When form pin thread 41 after heating process time, can after forming pin thread 41, cut bottom 25, or can after cutting bottom 25, form pin thread 41.
Like this, just can manufacture contact structures 42.These contact structures in its function corresponding to the movable contact 5 shown in Fig. 4.In addition, in these contact structures, contact chip 32 is attached firmly to electrode bar 33 and for reinforcing 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 for reinforcing electrode bar 33.
In this example, in heating process, make whole contact structures form one by infiltrating method, exempted soldering processes.Therefore, to brazing layer material be in the footing that poor wettable austenitic stainless steel can be used on contact chip 32 (flange 38), any surface treatment that for the footing (hollow circle tube part 39) of electrode bar 33 and pin thread 41 (part of remaining cylinder 26 after cutting processing) and not need to be such as nickel plating, utilize the good corrosion resistance of austenitic stainless steel.
Use the base metal material of CuCr alloy as contact chip 32 although this example is described, contact chip also can comprise one or both in copper and 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 manufacture vacuum valve, cylinder, electrode bar and contact chip by with in being used to form the infiltration of contact chip, heating and form one, and pin thread is formed on cylinder.So, before heating process, do not have the part of each assembling of accurate relative size not hinder in heating with after solidifying and guarantee the suitable relative size according to cylinder.
Therefore, method of the present invention allows the size of assembled part coarse and exempt soldering processes.Therefore, simplified manufacturing step.Realize the firm link of interface between part by infiltrating method, and needed large-scale pressure apparatus in linking without solid phase.Therefore, can provide cheap contact.
[example 2]
Fig. 3 (a) and 3 (b) are the cutaway views that the example of two shape all-in-one-piece assemblies in the method for example 2 of the contact structures of manufacturing vacuum valve is shown; And Fig. 3 (c) is the cutaway view of the structure of the contact structures that illustrated.By manufacturing contact structures that the method for contact structures of vacuum valve of example 2 manufactures corresponding to the fixed contact therefor 7 of vacuum valve shown in Fig. 4.
Except in structure and size some difference, the basis material that is used in the each several part in the method for the contact structures of manufacturing vacuum valve in this example 2 is identical with the material in example shown in Fig. 1 (a).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.There is Reference numeral in Reference numeral and Fig. 1 (a), 1 (b) and 2 of the part identical with partial function in Fig. 1 (a), 1 (b) and 2 in Fig. 3 (a), 3 (b) and 3 (c) identical.
First, as shown in Fig. 3 (a) or 3 (b), prepare the cylinder 26 with cup-like structure, cylinder has inwardly outstanding jut 45 in the center of bottom 25.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 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 and makes and use welding portion 47 to be attached to the bottom surface of hollow circle tube part 39 with hollow circle tube part 39.
Subsequently, the basis material of electrode bar 27 be placed on jut 45 and be arranged in cylinder 26.Then by the opening of molded 28 of the sintered body basis material 27 for installing electrodes rod that is put into cylinder 26 and be fixed on this opening.Then, infiltration material 29 is placed on the top surface of molded 28.
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), assembly 43 or 44 is heated at 1,200 DEG C of temperature by powder metallurgic method.
This heating process melts infiltration material 29 on molded 28 and the basis material 27 of cylinder 26 interior electrode bars.Hole and remaining infiltration material 29 in filling porous molded 28 of infiltration material 29 fall in cylinder 26.
The basis material 27 of remaining infiltration material 29 and electrode bar becomes an entirety and is filled in the cylinder 26 around jut 45 in cylinder 26, and becomes equably solid.
The Thickness Ratio that forms one and cylinder 26 except the basis material 27 of jut 45 and electrode bar in cylinder 26 is used to form the needed thin thickness of pin thread and is exactly the thickness of hollow circle tube part 39, fusing and solidify after assembly structure with shown in Fig. 1 (b), be heating and curing after body 31 identical.
Although Fig. 3 (c) illustrates the structure after fine finishining, but as shown in Fig. 3 (c), infiltration material 29 in the each several part of the contact structures that melt and infiltrate forms contact chip 32, contact chip 32 has the inside of reinforcement on the top of cylinder 26, and by the top (molded standing part) that is penetrated into cylinder 26, the top of contact chip 32 and cylinder 26 is formed to one.
In addition, the infiltration material 29 of fusing falls in cylinder 26 and in cylinder 26 becomes an entirety to form the electrode bar 33 that comprises jut 45 with the basis material 27 of electrode bar.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 is to expose around the basal surface 33 of the electrode bar 33 of the bottom of jut 45, then at the interior formation negative thread 48 of jut 45.
Can before heating process, form negative thread 48.When form negative thread after heating time, can after forming negative thread 48, cut bottom 25, or can after cutting bottom 25, form negative thread 48.
Therefore, complete the contact structures 49 corresponding to the fixed contact therefor 7 shown in Fig. 4 in its function.In contact structures 49, realize following firm link: between contact chip 32 and electrode bar 33; Between the hollow circle tube part 39 of contact chip 32 and cylinder 26, hollow circle tube part is the footing for electrode bar 33; Between hollow circle tube part 39 and electrode bar 33 and between electrode bar 33 and negative thread 48.
In this external this example 2, make whole contact structures form one based on infiltrating method by heating, thereby exempt soldering processes.Therefore, brazing layer material is to poor wettable austenitic stainless steel and can be used for forming the cylinder 26 of reinforcing electrode 33, and form the negative thread that processes from jut 45, and without the surface treatment such as nickel plating and utilize the good corrosion resistance of austenitic stainless steel.
In this example 2 of method of contact structures of manufacturing above-mentioned vacuum valve, bottom has cylinder, electrode bar and the contact chip of jut by heat and form one with the infiltration that is used to form contact chip simultaneously, and negative thread is formed on jut.So, before heating process, do not have the each part of assembling of accurate relative size not hinder in heating with after solidifying and guarantee the suitable relative size according to cylinder.
Therefore, method of the present invention allows the size of assembled part coarse and exempt soldering processes.Therefore, simplified manufacturing step.Realize the firm link of interface between part by infiltrating method, and needed large-scale pressure apparatus in linking without solid phase.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 up of the contact structures 49 of the contact structures of example 1 42 or example 2.
Claims (14)
1. a method of manufacturing the contact structures of vacuum valve, comprises the following steps:
(1) preparation has the cylinder of cup-like structure, and described cylinder has bottom;
(2) basis material of electrode bar is installed in described cylinder;
(3) by molded of sintered body be fixed on described cylinder for the opening part of described basis material of described electrode bar is installed;
(4) infiltration material is placed on the top surface of described molded;
Above-mentioned four steps form together and comprise the described basis material of described cylinder, described electrode bar, the assembly of described molded and described infiltration material;
(5) in nonoxidizing atmosphere, heat the described assembly that comprises described infiltration material by powder metallurgic method, described heating steps comprises the following steps:
(i) form contact chip at the top place of described cylinder by described infiltration material being penetrated in described molded,
By described infiltration material is penetrated into described cylinder for the position of fixing described molded and by described contact chip and described cylinder top formation one,
(iii) in described cylinder, form described electrode bar by described infiltration material being penetrated in described cylinder, and the described basis material of described cylinder and described electrode bar is formed to one, and
(iv) by described infiltration material being penetrated into the outer surface of described electrode bar and the inwall of described cylinder, described electrode bar and described cylinder are formed to one;
(6) the described bottom that cuts described cylinder is to expose the basal surface of described electrode bar; And
(7) after above-mentioned steps, in the periphery at the contrary one end place of the other end with forming described contact chip of described cylinder, form pin thread.
2. a method of manufacturing the contact structures of vacuum valve, comprises the following steps:
(1) preparation has the cylinder of cup-like structure, and described cylinder has inwardly outstanding jut in the center of the bottom of described cylinder;
(2) by the basis material of electrode bar being put on described jut and the described basis material of described electrode bar is installed in described cylinder;
(3) by molded of sintered body be fixed on described cylinder for the opening part of basis material of described electrode bar is installed;
(4) infiltration material is placed on the top surface of described molded;
Above-mentioned four steps form together and comprise the described basis material of described cylinder, described electrode bar, the assembly of described molded and described infiltration material;
(5) in nonoxidizing atmosphere, heat the described assembly that comprises described infiltration material by powder metallurgic method, described heating steps comprises the following steps:
(i) form contact chip at the top place of described cylinder by described infiltration material being penetrated in described molded,
By described infiltration material is penetrated into described cylinder for the position of fixing described molded and by described contact chip and described cylinder top formation one,
(iii) in described cylinder, form the described electrode bar that surrounds described jut by described infiltration material being penetrated in described cylinder, and the described basis material of described cylinder and described electrode bar is formed to one, and
(iv) by described infiltration material being penetrated into the outer surface of described electrode bar and the inwall of described cylinder, described electrode bar and described cylinder are formed to one;
(6) bottom that cuts described cylinder is to expose the basal surface of the described electrode bar forming around the bottom of described jut; And
(7) after above-mentioned steps, on described jut, form negative thread.
3. the method for the contact structures of manufacture 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 pin thread and the basis material of negative thread are austenitic stainless steels.
4. the method for the contact structures of manufacture vacuum valve as claimed in claim 1 or 2, is characterized in that, the described basis material of described electrode bar and described infiltration material are made up of copper.
5. the method for the contact structures of manufacture vacuum valve as claimed in claim 1 or 2, is characterized in that, described molded comprises one or both in copper and silver, and is selected from the material of the carbide of chromium, tungsten, molybdenum, tantalum and chromium, tungsten, molybdenum, tantalum.
6. the method for the contact structures of manufacture vacuum valve as claimed in claim 5, is characterized in that, described molded comprises at least one element that is selected from tellurium, bismuth and lead.
7. the method for the contact structures of manufacture vacuum valve as claimed in claim 1 or 2, is characterized in that, described contact chip be fixed contact piece or be arranged to be connected and to throw off with described fixed contact piece can moving contacting plate.
By the method manufacturing of the contact structures of manufacture vacuum valve as claimed in claim 1 for connecting/cut off the contact structures of 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 supports described contact chip and described electrode bar, and has pin thread, and described pin thread is formed in the periphery of one end contrary with the other end that supports described contact chip,
Wherein by heating infiltration material, in the interface of described contact chip and described cylinder and the interface of described cylinder and described electrode bar, described infiltration material infiltrates in the border of cylinder, the remainder of described infiltration material and described electrode bar form entirety continuous with the infiltration material in described contact chip in addition, and described contact chip, described electrode bar and described cylinder are formed to one.
By the method manufacturing of the contact structures of manufacture vacuum valve as claimed in claim 2 for connecting/cut off the contact structures of 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 supports described contact chip and described electrode bar; And
Negative thread, described negative thread is formed in described electrode bar at one end place contrary with the other end of the described contact chip of supporting of described cylinder,
Wherein by heating infiltration material, in the interface of described contact chip and described cylinder and the interface of described cylinder and described electrode bar, described infiltration material infiltrates in the border of cylinder, the remainder of described infiltration material and described electrode bar form entirety continuous with the infiltration material in described contact chip in addition, and described contact chip, described electrode bar, described cylinder and described negative thread are formed to one.
10. the contact structures of vacuum valve as claimed in claim 8 or 9, is characterized in that, described contact chip be fixed contact piece or be arranged to be connected and to throw off with described fixed contact piece can moving contacting plate.
11. contact structures of vacuum valve as claimed in claim 8 or 9, is characterized in that, described integratedly undertaken by infiltrating method.
12. contact structures of vacuum valve as claimed in claim 8 or 9, is characterized in that, described contact chip comprises one or both in copper and silver, and is selected from the material of the carbide of chromium, tungsten, molybdenum, tantalum and chromium, tungsten, molybdenum, tantalum.
The contact structures of 13. vacuum valves as claimed in claim 12, is characterized in that, described contact chip comprises at least one element that is selected from tellurium, bismuth and lead.
14. contact structures of vacuum valve as claimed in claim 8 or 9, is characterized in that, the basis material of described cylinder, the basis material of described cylinder with pin thread and the basis material of negative thread are austenitic stainless steels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008257407A JP4770903B2 (en) | 2008-10-02 | 2008-10-02 | Contact structure of vacuum valve and manufacturing method thereof |
| JP2008-257407 | 2008-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101714478A CN101714478A (en) | 2010-05-26 |
| CN101714478B true 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) |
Families Citing this family (9)
| 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 |
| CN108885958B (en) * | 2016-03-29 | 2020-02-07 | 三菱电机株式会社 | Method for manufacturing contact member, and vacuum valve |
| WO2017179315A1 (en) * | 2016-04-12 | 2017-10-19 | 三菱電機株式会社 | Vacuum circuit breaker and gas-insulated switchgear and air-insulated switchgear having integrated vacuum circuit breaker |
| DE102016213294B4 (en) * | 2016-07-20 | 2018-09-13 | Siemens Aktiengesellschaft | Stiffened contact rod and method of making a contact rod |
| CN114270460A (en) * | 2019-08-27 | 2022-04-01 | 三菱电机株式会社 | Electric contact, vacuum valve with electric contact, and method for manufacturing electric 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 |
| 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 |
|---|---|---|---|---|
| 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 DE DE102009043615A patent/DE102009043615B4/en not_active Expired - Fee Related
- 2009-09-29 CN CN200910205001.9A patent/CN101714478B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009043615B4 (en) | 2011-08-25 |
| JP2010086898A (en) | 2010-04-15 |
| CN101714478A (en) | 2010-05-26 |
| 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. |