CN101552109B - Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation - Google Patents
Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation Download PDFInfo
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- CN101552109B CN101552109B CN2008102326823A CN200810232682A CN101552109B CN 101552109 B CN101552109 B CN 101552109B CN 2008102326823 A CN2008102326823 A CN 2008102326823A CN 200810232682 A CN200810232682 A CN 200810232682A CN 101552109 B CN101552109 B CN 101552109B
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Abstract
The invention discloses an insulation method for preventing a metal screw or a bolt from generating magnetic flux leakage linkage circulation; the insulation method is characterized by comprising the following steps of wrapping the middle of the screw or the bolt by weft-free glass filaments with thickness of 1-4mm, using thermosetting insulation resin for infiltrating the glass filaments to form an insulation layer, and processing the surface after the insulation layer is solidified so as to lead the surface to be smooth and lead the outer diameter size of the screw or the bolt insulated by wrapping to be capable of extending into the hole of a structure part flange; and the insulation layer separates the structure part from one section of the middle part of the screw.
Description
Technical field
The present invention relates to a kind of insulating method of metal connecting piece, particularly a kind of be used for power transformer and reactor prevent metal screw or bolt in high leakage field place because the leakage field linkage produces the insulating method of circulation.
Background technology
Along with the continuous increase of big capacity of China and long distance powedr transmission demand, the development of electrical network has been experienced from medium voltage network, high-voltage fence to supergrid, to the developing history of extra-high voltage grid.For power equipment, connecting two different metal structural members with metal screw or bolt is kind of common fastening means.Yet for big capacity extra-high voltage electric power transformer and reactor product, when two different metal structural members that are in high leakage field place connect with metal screw or bolt, because the leakage field linkage can form current circuit between screw rod or bolt, stream has induction circulation.The loop of leakage field linkage is many more, the circulation that produces can be big more, cause hardware in the peripheral extent of screw rod or bolt, to produce local overheating, and then the unusual and operation troubles of oil chromatography occurs, bring destabilizing factor for the safe and reliable operation at power transmission and transformation networking.
Summary of the invention
The purpose of this invention is to provide a kind of insulating method that prevents metal screw or bolt leakage field linkage circulation, by metal screw or the bolt that connects two different metal structural members adopted the minor insulation measure, metal screw or bolt are opened with two hardwares insulation that are in high leakage field place, cut off the current circuit that the leakage field linkage produces between screw rod or bolt, prevent to produce circulation between screw rod or bolt and cause local overheating.
For reaching above purpose, the present invention takes following technical scheme to be achieved:
A kind of insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation, comprise the steps: to hold the thick no latitude glass fiber of 1～4mm at screw rod or bolt mid portion, soak into glass fiber with thermoset insulating resin and form insulating barrier, after treating that insulating barrier solidifies, finished surface makes it smooth, and the outside dimension of bag insulation back screw rod or bolt can be put in the structural member flange hole; Insulating barrier is with first structural member, second structural member and screw rod or one section isolation of bolt mid portion.
In the such scheme, also can be eel-like figure portion in the middle of described screw rod or the bolt, process in advance; The insulating barrier of described screw rod puts in the flange hole of second structural member, one of screw rod connects the end and is screwed in the flange blind hole of first structural member, and another of screw rod connects end connects second structural member outside by packing ring and insulating washer, spring washer clamp nut.
The insulating barrier of described bolt can pass in the flange hole of second, first structural member, bolt and second structural member be connected end and packing ring and insulating washer, the end is connected first structural member outside with spring washer by packing ring the clamp nut that is connected of bolt and first structural member.
The insulation mode of metal screw of the present invention or bolt successfully uses on power transformer and reactor product.Evidence adopts the inventive method effect obvious, has avoided fully because high leakage field place leakage field linkage forms the loop between screw rod or bolt, produces circulation and causes local overheating.Advantages such as simultaneously, connecting screw rod or bolt after the bag insulation have good concentricity, and two ends are smooth.
Description of drawings
Fig. 1 is the insulation system of a kind of metal screw of the present invention (middle part is not with eel-like figure).
Fig. 2 is the concrete connection diagram of Fig. 1 metal screw and two hardwares.
Fig. 3 is the insulation system of the another kind of metal screw of the present invention (middle part eel-like figure).
Fig. 4 is the concrete connection diagram of Fig. 3 metal screw and two hardwares.
Fig. 5 is the insulation system of a kind of metal bolts of the present invention.
Fig. 6 is the concrete connection diagram of Fig. 5 metal bolts and two hardwares.
Fig. 1 is in Fig. 6: 1, screw rod eel-like figure portion; 2, structural member I connects the end; 3, insulating barrier; 4, structural member II connects the end; 5, insulating washer.
Embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Embodiment 1
As shown in Figure 1 and Figure 2, at the metal screw tundish around no latitude glass fiber, about 1～the 4mm of thickness, use thermoset insulating resin (as epoxy resin) to soak into then and form insulating barrier 3, concrete thickness will cooperate with the flange hole size dimension of hardware II, the insulated part that needs to guarantee screw rod can put in the flange hole, leave certain clearance simultaneously, therefore need the outside dimension of strict controlling packet insulation back screw rod, after waiting not have 3 curing of latitude ferry glass insulation layer, but the Vehicle Processing surface makes its smooth surface to the thickness of regulation.End 2 is screwed in the flange blind hole of structural member I, and insulating barrier 3 puts in the flange hole of structural member II, with one section isolation in the middle of structural member I, structural member II and the screw rod; End 4 is by packing ring and insulating washer 5, spring washer attaching nut; The insulating barrier 3 of screw rod must put in the insulating washer 5.
As shown in Figure 3, Figure 4, also can be processed into eel-like figure portion 1 in the middle of the metal screw in advance, not have the winding of latitude glass fiber at the screw rod tundish, about 1～the 4mm of thickness, the concrete grammar of bag insulation is identical with embodiment 1 with requirement, end 2 is screwed in the flange blind hole of structural member I, insulating barrier 3 puts in the flange hole of structural member II, with 1 one sections isolation of eel-like figure portion in the middle of structural member I, structural member II and the screw rod; End 4 is by packing ring and insulating washer 5, spring washer attaching nut; The insulating barrier 3 of screw rod must put in the insulating washer 5.
When adopting metal bolts to connect, for eel-like figure or be not with eel-like figure,, be not with eel-like figure, tundish not to have the latitude glass fiber in the middle of the bolt and twine in the middle of the bolt as Fig. 5, shown in Figure 6, the about 1～4mm of thickness, the concrete grammar of bag insulation is identical with embodiment 1 with requirement.Insulating barrier 3 is passed the flange hole of structural member II, I, and end 2 is by packing ring and spring washer attaching nut; Put in insulating barrier 3 in the flange hole of structural member I, II with structural member I, II and 3 one sections isolation of bolt intermediate insulating layer; Fastening bolt behind end 4 and packing ring and the insulating washer; The insulating barrier 3 of bolt must put in the insulating washer 5.
The insulation mode scope of application of metal screw of the present invention or bolt is very wide, such as on high-tension power transmission and transformation equipment, can adopt this insulation mode for the fuel tank case that is in high leakage field place along the bolt of junction, can effectively avoid forming between the bolt circulation and produce local overheating.
Claims (6)
1. insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation, it is characterized in that, comprise the steps: at screw rod or the thick no latitude glass fiber of bolt mid portion parcel 1～4mm, soak into glass fiber with thermoset insulating resin and form insulating barrier, after treating that insulating barrier solidifies, finished surface makes it smooth, and the outside dimension of screw rod after the wrap insulate or bolt can be put in the structural member flange hole; Insulating barrier is with structural member and screw rod or one section isolation of bolt mid portion.
2. the insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation as claimed in claim 1 is characterized in that, is eel-like figure portion in the middle of described screw rod or the bolt, processes in advance.
3. the insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation as claimed in claim 1 or 2, it is characterized in that, the insulating barrier of described screw rod puts in the flange hole of second structural member, connect the end with one of screw rod and be screwed in the flange blind hole of first structural member, another connects end connects second structural member outside by packing ring and insulating washer, spring washer clamp nut with screw rod.
4. the insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation as claimed in claim 1 or 2, it is characterized in that, the insulating barrier of described bolt puts in the flange hole of second, first structural member, one of bolt connects between end and second structural member outside and is provided with packing ring and insulating washer, and another of bolt connects end and pass behind first structural member by packing ring and spring washer and be connected with clamp nut outside first structural member.
5. the insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation as claimed in claim 3 is characterized in that the insulating barrier of described screw rod puts in the insulating washer.
6. the insulating method that prevents metal screw or bolt from generating magnetic flux leakage linkage circulation as claimed in claim 4 is characterized in that the insulating barrier of described bolt puts in the insulating washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102326823A CN101552109B (en) | 2008-12-11 | 2008-12-11 | Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102326823A CN101552109B (en) | 2008-12-11 | 2008-12-11 | Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101552109A CN101552109A (en) | 2009-10-07 |
| CN101552109B true CN101552109B (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102326823A Active CN101552109B (en) | 2008-12-11 | 2008-12-11 | Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509614A (en) * | 2019-01-07 | 2019-03-22 | 特变电工湖南工程有限公司 | Case is along structure |
| CN111341531A (en) * | 2020-03-06 | 2020-06-26 | 山东电力设备有限公司 | Transformer insulation structure and mounting method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4131259A1 (en) * | 1991-09-17 | 1993-03-18 | Tro Transformatoren Und Schalt | Cable feedthrough for measuring transducer - has cast resin plate screwed or clamped into aperture with wire sleeves extending into casing |
| CN2665884Y (en) * | 2003-11-14 | 2004-12-22 | 上海安伏激光电子电气设备有限公司 | Low loss iron core reactor with air gap |
| CN2862286Y (en) * | 2005-11-01 | 2007-01-24 | 特变电工沈阳变压器集团有限公司技术中心 | New-pattern screening device for iron core clamp piece |
-
2008
- 2008-12-11 CN CN2008102326823A patent/CN101552109B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4131259A1 (en) * | 1991-09-17 | 1993-03-18 | Tro Transformatoren Und Schalt | Cable feedthrough for measuring transducer - has cast resin plate screwed or clamped into aperture with wire sleeves extending into casing |
| CN2665884Y (en) * | 2003-11-14 | 2004-12-22 | 上海安伏激光电子电气设备有限公司 | Low loss iron core reactor with air gap |
| CN2862286Y (en) * | 2005-11-01 | 2007-01-24 | 特变电工沈阳变压器集团有限公司技术中心 | New-pattern screening device for iron core clamp piece |
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| Publication number | Publication date |
|---|---|
| CN101552109A (en) | 2009-10-07 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091007 Assignee: Xi'an XD Transformer Co., Ltd. Assignor: China XD Electronic Corporation Contract record no.: 2013610000064 Denomination of invention: Insulation method for preventing metal screw or bolt from generating magnetic flux leakage linkage circulation Granted publication date: 20110119 License type: Exclusive License Record date: 20130624 |
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