CN105655192A - Manufacturing method of solid-sealed polar pole utilizing insulating sheath to cover vacuum arc-extinguishing chamber - Google Patents
Manufacturing method of solid-sealed polar pole utilizing insulating sheath to cover vacuum arc-extinguishing chamber Download PDFInfo
- Publication number
- CN105655192A CN105655192A CN201610022002.XA CN201610022002A CN105655192A CN 105655192 A CN105655192 A CN 105655192A CN 201610022002 A CN201610022002 A CN 201610022002A CN 105655192 A CN105655192 A CN 105655192A
- Authority
- CN
- China
- Prior art keywords
- vacuum interrupter
- insulating sheath
- pole
- cladding
- manufacture method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
Abstract
The invention provides a manufacturing method of a solid-sealed polar pole utilizing an insulating sheath to cover a vacuum arc-extinguishing chamber. The vacuum arc-extinguishing chamber and at least one conductive end are used as inserts and placed into a die. The outer insulating sheath covering the vacuum arc-extinguishing chamber is manufactured in such a manner that thermoplastic plastic is injected under a pressure of 50-78 bars, so that the solid-sealed polar pole is obtained. The manufacturing method of the solid-sealed polar pole utilizing the insulating sheath to cover the vacuum arc-extinguishing chamber can effectively improve the machining efficiency.
Description
Technical field
The present invention relates to power switchgear, the manufacture method of especially a kind of pole.
Background technology
In power switchgear, pole comprises vacuum interrupter, the conducting end being connected with two conducting connecting bars of vacuum interrupter, and the insulating barrier of outside cladding is constituted. Its manufacture method is: be embedded in mould with epoxy resin composition cast molding by the conducting end that vacuum interrupter and at least one are attached thereto. The device that vacuum interrupter is earthenware and switch contact is sealed in vacuum environment by two ends crown cap. It allows at least one contact moving axially along vacuum interrupter. Contact is provided with and stretches out the connecting rod sealing lid, electrically connect for constituting with external conductor. Moveable connecting rod connects mechanical component, makes contact can contact in vacuum environment or separately, thus realizing switch motion, the electric arc not only produced during on-off circuit can extinguish rapidly, and less fracture distance also can bear significantly high voltage.
Vacuum interrupter generally adopts the mixture of epoxy resin at ambient pressure or to add and carry out cladding casting under less than the pressure of 10 bars, and this epoxy resin composition is favorably improved the outer dielectric intensity of vacuum interrupter and undertakes the function of machinery. It addition, vacuum interrupter is in order to improve outer dielectric intensity, and compensate the differences in expansion of epoxy resin and earthenware, the material jacket of caoutchouc elasticity can be used before cast.
Epoxy resin composition has different thermal coefficient of expansions from the earthenware of vacuum interrupter, thermal stress in casting process very easily causes that insulating sheath cracks, must flow through the appropriate firming agent of coupling and control curing rate, cause that the time of epoxy casting is longer, production efficiency is low.
Owing to each insulant (such as epoxy resin composition and pottery or and gum elastic) has different thermal coefficient of expansions, the variations in temperature using environment may result in adjacent boundary region and produces displacement, this displacement is likely to result between two kinds of insulant and there is small gap, the dielectric strength outside reducing. For this before casting or jacket, built in items surface is by coated with adhesive, to obtain good adhesiveness, and forms certain elastomer compensation part differences in expansion.
Summary of the invention
For the deficiency that the working (machining) efficiency overcoming existing pole manufacture method is relatively low, the present invention provides the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter of a kind of effective lifting working (machining) efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of manufacture method of the pole adopting insulating sheath cladding vacuum interrupter, vacuum interrupter and at least one conducting end are put in mould as inserts, by adopting the exterior insulation sheath of the method manufacture cladding vacuum interrupter of the pressure injection thermoplastic of 50 to 78 bars, thus obtaining pole.
Further, injection temperature interval is 250��300 DEG C. This operation interval is preferred scheme, if temperature is too low, then needs higher pressure; If hypertonia, the sealing structure of vacuum interrupter can be destroyed.
Further, before vacuum interrupter carries out coating and injection moulding, in the cast of described vacuum extinction chamber outer wall or press moulding mode cladding, there is elastic cushion rubber layer. The program can compensate the expansion coefficient difference of plastic insulation sheath and vacuum interrupter.
After vacuum interrupter carries out coating and injection moulding, to be coated with waterproof layer with cast or press moulding mode at insulating sheath outer surface. The program has water-proof function.
Before vacuum interrupter carries out coating and injection moulding, at described vacuum extinction chamber outer wall coating adhesive adhensive layer. The program can obtain good adhesion characteristics.
The technology of the present invention is contemplated that: the insulating sheath of outside adopts thermoplastic manufacture, and is directly placed in mould by vacuum interrupter and carries out injection moulding. Epoxy resin casting technique be 120��160 DEG C, environment normal pressure carries out between tens bars. And thermoplastic plastic injecting technology obvious difference is that with it the injection temperature of 250��300 DEG C, the injection pressure of 50��78 bars. Relatively low injection temperature will need higher injection pressure, but too high pressure very easily damages the sealing structure of vacuum interrupter.
Owing to the feature that under epoxy resin composition normal pressure, pouring pressure is high, molding is fast compared by injection molded thermoplastic's plastics, therefore, the mixture being not likely to produce epoxy resin settles the discontinuity of materials caused, thus affecting the reduction of mechanically and electrically dielectric strength, the wall thickness of thermoplastic insulation's sheath can be less than what epoxy resin composition did.
Thermal expansion coefficient difference due to vacuum interrupter ceramic insulation shell Yu thermoplastic, therefore, before vacuum interrupter carries out coating and injection moulding, elastic cushion rubber layer can also be had, to compensate the expansion coefficient difference of plastic insulation sheath and vacuum interrupter by cast or press moulding mode cladding.
Equally, the difference of both thermal coefficient of expansions can cause that its contact surface varies with temperature generation and offsets, and such offsetting causes having small gap between the two, makes the external insulation effect of sheath decline. In order to obtain good adhesion characteristics, in the region of one or more boundary region, adopt adhesive.
If used out of doors, the various pollution such as rainwater and grieshoch will cause that insulating sheath anti-electric creepage performance declines, for this, it is also possible to uses cast or press moulding mode at the rubber-coated waterproof layer of insulating sheath outer surface.
Beneficial effects of the present invention is mainly manifested in: 1, quick molding mode makes production efficiency be greatly improved; 2, thermoplastic articles disassembled and recycling after lifetime, reduces solid waste quantity protection environment; The high pressure of injection moulding and quickly to make material implant be not likely to produce sedimentation, electric insulation and mechanical strength balanced, thus reducing the use of insulant.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the pole of the first employing insulating sheath cladding vacuum interrupter.
Fig. 2 is the schematic diagram that the second adopts the pole of insulating sheath cladding vacuum interrupter.
Fig. 3 is the schematic diagram of the pole of the third employing insulating sheath cladding vacuum interrupter.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1��Fig. 3, a kind of manufacture method of the pole adopting insulating sheath cladding vacuum interrupter, vacuum interrupter and at least one conducting end are put in mould as inserts, by adopting the exterior insulation sheath of the method manufacture cladding vacuum interrupter of the pressure injection thermoplastic of 50 to 78 bars, thus obtaining pole.
Further, injection temperature interval is 250��300 DEG C. This operation interval is preferred scheme, if temperature is too low, then needs higher pressure; If hypertonia, the sealing structure of vacuum interrupter can be destroyed.
Further, before vacuum interrupter carries out coating and injection moulding, in the cast of described vacuum extinction chamber outer wall or press moulding mode cladding, there is elastic cushion rubber layer. The program can compensate the expansion coefficient difference of plastic insulation sheath and vacuum interrupter.
After vacuum interrupter carries out coating and injection moulding, to be coated with waterproof layer with cast or press moulding mode at insulating sheath outer surface. The program has water-proof function.
Before vacuum interrupter carries out coating and injection moulding, at described vacuum extinction chamber outer wall coating adhesive adhensive layer. The program can obtain good adhesion characteristics.
Fig. 1 schematically shows a vacuum interrupter. Contact and drive member such as drive rod does not describe. Vacuum interrupter and electric connecting terminal are placed in injection mold, fixing and injection moulding. Adhesive can be scribbled in order to better adhere in one or more boundary region at this vacuum interrupter.
Open mould when injection moulding process terminates and take out the pole of finished product.
At this at Fig. 1 pole described, including a vacuum interrupter 1 and an insulating sheath 2.
The pole that Fig. 2 describes, its vacuum interrupter 1 is provided with a layer of compensation 3, and this layer of compensation, for having elastic rubber, surrounds this sky arc-chutes 1 by mold pressing or pouring type.
Describing a pole in figure 3, this pole is to cover waterproof layer 5 outside the pole of Fig. 1 or Fig. 2, and this waterproof layer can adopt cast, mold pressing or injection molding manner manufacture.
Claims (5)
1. the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter, it is characterized in that: vacuum interrupter and at least one conducting end are put in mould as inserts, by adopting the exterior insulation sheath of the method manufacture cladding vacuum interrupter of the pressure injection thermoplastic of 50 to 78 bars, thus obtaining pole.
2. the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter as claimed in claim 1, it is characterised in that: injection temperature interval is 250��300 DEG C.
3. the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter as claimed in claim 1 or 2, it is characterized in that: before vacuum interrupter carries out coating and injection moulding, in the cast of described vacuum extinction chamber outer wall or press moulding mode cladding, there is elastic cushion rubber layer.
4. the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter as claimed in claim 1 or 2, it is characterised in that: after vacuum interrupter carries out coating and injection moulding, to be coated with waterproof layer with cast or press moulding mode at insulating sheath outer surface.
5. the manufacture method of the pole adopting insulating sheath cladding vacuum interrupter as claimed in claim 1 or 2, it is characterised in that: before vacuum interrupter carries out coating and injection moulding, at described vacuum extinction chamber outer wall coating adhesive adhensive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610022002.XA CN105655192A (en) | 2016-01-13 | 2016-01-13 | Manufacturing method of solid-sealed polar pole utilizing insulating sheath to cover vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610022002.XA CN105655192A (en) | 2016-01-13 | 2016-01-13 | Manufacturing method of solid-sealed polar pole utilizing insulating sheath to cover vacuum arc-extinguishing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105655192A true CN105655192A (en) | 2016-06-08 |
Family
ID=56487294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610022002.XA Pending CN105655192A (en) | 2016-01-13 | 2016-01-13 | Manufacturing method of solid-sealed polar pole utilizing insulating sheath to cover vacuum arc-extinguishing chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105655192A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207841A (en) * | 2016-09-14 | 2016-12-07 | 许继集团有限公司 | Inflatable switch cabinet and pole thereof |
| CN109065405A (en) * | 2018-09-25 | 2018-12-21 | 江苏南瑞帕威尔电气有限公司 | A kind of pole |
| CN110504130A (en) * | 2018-05-16 | 2019-11-26 | Ls产电株式会社 | Polarity members component for breaker |
| CN111863485A (en) * | 2020-06-30 | 2020-10-30 | 国网电力科学研究院有限公司 | Circuit breaker pole part and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198580A (en) * | 1997-03-22 | 1998-11-11 | Abb·专利有限公司 | Vacuum box |
| CN103069528A (en) * | 2010-07-15 | 2013-04-24 | Abb技术股份公司 | Circuit-breaker pole part and method for producing such a pole part |
| CN103531400A (en) * | 2013-11-04 | 2014-01-22 | 宁波优维电力科技有限公司 | Solid-sealed polar pole and production method thereof |
-
2016
- 2016-01-13 CN CN201610022002.XA patent/CN105655192A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198580A (en) * | 1997-03-22 | 1998-11-11 | Abb·专利有限公司 | Vacuum box |
| CN103069528A (en) * | 2010-07-15 | 2013-04-24 | Abb技术股份公司 | Circuit-breaker pole part and method for producing such a pole part |
| US20130126480A1 (en) * | 2010-07-15 | 2013-05-23 | Abb Technology Ag | Circuit-breaker pole part and method for producing such a pole part |
| CN103531400A (en) * | 2013-11-04 | 2014-01-22 | 宁波优维电力科技有限公司 | Solid-sealed polar pole and production method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207841A (en) * | 2016-09-14 | 2016-12-07 | 许继集团有限公司 | Inflatable switch cabinet and pole thereof |
| CN110504130A (en) * | 2018-05-16 | 2019-11-26 | Ls产电株式会社 | Polarity members component for breaker |
| CN110504130B (en) * | 2018-05-16 | 2022-06-21 | Ls产电株式会社 | Polar component assembly for circuit breaker |
| CN109065405A (en) * | 2018-09-25 | 2018-12-21 | 江苏南瑞帕威尔电气有限公司 | A kind of pole |
| CN111863485A (en) * | 2020-06-30 | 2020-10-30 | 国网电力科学研究院有限公司 | Circuit breaker pole part and manufacturing method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160608 |
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| RJ01 | Rejection of invention patent application after publication |