CN101725608B - Insulating fastening bolt and manufacturing method thereof - Google Patents
Insulating fastening bolt and manufacturing method thereof Download PDFInfo
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- CN101725608B CN101725608B CN200910251035A CN200910251035A CN101725608B CN 101725608 B CN101725608 B CN 101725608B CN 200910251035 A CN200910251035 A CN 200910251035A CN 200910251035 A CN200910251035 A CN 200910251035A CN 101725608 B CN101725608 B CN 101725608B
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- fastening bolt
- insulating
- insulating fastening
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Abstract
In order to overcome the defects that insulating fastening bolts in the prior art have loose tissue, bubbles, shrinkage and the like in axis heart parts, resulting in partial electric discharge and other defects produced under high voltage or electric fields, the invention proposes an insulating fastening bolt and a manufacturing method thereof. The central axis of the insulating fastening bolt is provided with a slender through hole, and insulating oil can flow in the through hole to ensure that partial electric discharge cannot be produced under high voltage or electric fields. The method for manufacturing the insulating fastening bolt adopts machining to mold the slender through hole on the central axis of the insulating fastening bolt after casting molding, or adopts extrusion to mold a bar material of which the central axis is provided with the slender through hole and then molds threads at two ends of the bar material, thereby overcoming the defects that insulating fastening bolts in the prior art have loose tissue, bubbles, shrinkage and the like in axis heart parts.
Description
Technical field
The present invention relates to insulating part in the power equipment accessory and preparation method thereof, specially refer to insulating fastening bolt in the power equipment accessory and preparation method thereof.
Background technique
Usually; In power equipment, need various insulating fastening bolts to be used for fixing or fastening other component; Existing technology adopts insulating material such as phenolic resin, epoxy resin, nylon and lamination silk insulation bar to make insulating fastening bolt usually; Adopt methods such as pressure injection, extruding, lamination be bonding that the aforementioned dielectric material is become bar, adopt the method for machining to be processed into bolt again.For other processing methods, the pressure pouring method can make that the operation of following process screw thread is comparatively simple at one-step forming screw thread at the beginning of when cast, has practiced thrift labor content, has reduced tool wear, thereby is extensively adopted.Another advantage of pressure pouring is that density of product is higher, therefore, and better mechanical property.Yet; In the pressure pouring process; Insulating material drops to the lower temperature demoulding from higher temperature, because the change in volume of insulating material, makes that loosening usually can appear in the axis portion of bolt, defectives such as bubble and shrinkage cavity; Make these bolts under HV, effect of electric field, produce partial discharge in use, seriously influence the safety of power equipment.
Summary of the invention
For the axis portion that overcomes the existence of existing technology insulating fastening bolt exists tissue looseness, bubble and shrinkage cavity etc., cause its defective such as following generation partial discharge at HV, electric field, the present invention proposes a kind of insulating fastening bolt and preparation method thereof.Insulating fastening bolt of the present invention is provided with slightness hole at central axis, and insulating oil can flow in slightness hole, makes it under HV, electric field, can not produce partial discharge.Insulating fastening bolt making method of the present invention adopts behind moulding by casting and is machined into insulating fastening bolt central axis molding long and thin through hole; Perhaps adopt the extrusion modling central axis to have behind the bar of slightness hole, overcome the axis portion that the existing technology insulating fastening bolt exists and had defectives such as tissue looseness, bubble and shrinkage cavity again at two end moulding screw threads of bar.
Insulating fastening bolt of the present invention is provided with slightness hole at the central axis of bolt.
Insulating fastening bolt of the present invention comprises and has the fixedly bolt of termination, perhaps not with the fixing bolt of termination.
Insulating fastening bolt making method of the present invention adopts after the pressure pouring moulding and is machined into insulating fastening bolt central axis molding long and thin through hole; Perhaps adopt bar that the extrusion modling central axis has a slightness hole again at two end moulding screw threads of bar.
The pressure pouring moulding of insulating fastening bolt making method of the present invention comprises: insulating material is extruded under higher temperature in the mould of preheating, the demoulding from mould again after the cooling; Perhaps under lower temperature, insulating material is joined in the mould, then mould is together heated together with insulating material, in heating, apply certain pressure, heat-insulation pressure keeping is after a period of time, the decrease temperature and pressure demoulding.
Insulating fastening bolt making method of the present invention adopts behind the insulating material moulding by casting and is machined into insulating fastening bolt central axis molding long and thin through hole, comprises adopting drill bit machine shaping slightness hole, perhaps adopts laser beam machining molding long and thin through hole.
The insulating material that insulating fastening bolt making method of the present invention is adopted comprises: phenolic resin, epoxy resin or nylon.
Description of drawings
Accompanying drawing 1 is the schematic three dimensional views that is widely used in the insulating fastening bolt of power equipment;
Accompanying drawing 2 is that insulating fastening bolt of the present invention has fixedly termination embodiment's schematic three dimensional views;
Accompanying drawing 3 is that insulating fastening bolt of the present invention is not with fixing termination embodiment's front view;
Accompanying drawing 4 is that insulating fastening bolt of the present invention has fixedly termination embodiment's front view;
Accompanying drawing 5 is that insulating fastening bolt of the present invention has the fixedly A-A sectional view of termination embodiment's front view.
Below in conjunction with accompanying drawing and embodiment insulating fastening bolt of the present invention is further described.
Accompanying drawing 1 is the schematic three dimensional views that is widely used in the insulating fastening bolt of power equipment, can know that by figure so-called insulating fastening bolt is just the same with plain bolt from the appearance, and different is to adopt the insulating material manufacturing.Obviously, the insulating material that is suitable for making bolt mainly is an organic material, as: phenolic resin, nylon, epoxy resin and lamination silk insulation bar etc.And to make the insulated product of one type of elongated shape of bolt, the production technology that pressure pouring technology comparatively is fit to beyond doubt.Yet raw material need be extruded in the mould under higher temperature during pressure pouring, after cooling after a while, and the demoulding from mould again.Perhaps, under lower temperature, insulating material is joined in the mould, then mould is together heated together with insulating material, in heating, apply certain pressure, heat-insulation pressure keeping is after a period of time, the decrease temperature and pressure demoulding.It is thus clear that no matter adopt which kind of mode, insulating material all need pass through the temperature-fall period from high temperature to low temperature, because aforementioned dielectric material coefficient of thermal expansion coefficient is all bigger, therefore, in cooling procedure, will inevitably occur loosening, defectives such as bubble and shrinkage cavity.Because the cooling of insulating material order normally from outside to inside, therefore, defectives such as loose, bubble and shrinkage cavity concentrate on bolt central axis annex usually.These bolts that have defectives such as loose, bubble and shrinkage cavity if run into HV, electric field, just possibly produce partial discharge in use, badly influence the safety of power equipment.
Embodiment
Accompanying drawing 2 is that insulating fastening bolt of the present invention has fixedly termination embodiment's schematic three dimensional views; Accompanying drawing 3 is that insulating fastening bolt of the present invention is not with fixing termination embodiment's front view; Accompanying drawing 4 is that insulating fastening bolt of the present invention has fixedly termination embodiment's front view, and accompanying drawing 5 is that insulating fastening bolt of the present invention has the fixedly A-A sectional view of termination embodiment's front view.Can know that by figure insulating fastening bolt of the present invention is provided with slightness hole at the central axis of bolt, this through hole is after pressure pouring, to adopt the machining moulding, defectives such as loose, bubble that has produced when having removed pressure pouring thus and shrinkage cavity.As long as the aperture of said elongated orifices is selected suitably can guarantee the required mechanical strength of clamping bolt fully.Usually; Insulating fastening bolt in use is soaked in the insulating oil mostly; Insulating oil can flow in slightness hole, because, there have not been tissue defects such as loose, bubble and shrinkage cavity in the insulating fastening bolt; Make insulating fastening bolt of the present invention under the situation of HV, electric field, also can not produce partial discharge, overcome the defective that existing technology pressure pouring insulating fastening bolt exists.
Obviously; Insulating fastening bolt of the present invention can adopt two kinds of method moulding at least; A kind of is after insulating material pressure pouring moulding, to adopt machine-tooled method at insulating fastening bolt central axis molding long and thin through hole, perhaps adopts the method for extrusion modling to be processed into behind the bar that central axis has elongated orifices two end moulding screw threads at bar again.These two kinds of methods have pluses and minuses separately, and the former advantage is can be easily an end of bolt to be processed into fixedly termination, and thread forming is more or less freely; The bolt density that is processed into is higher; Better mechanical property, shortcoming are that manufacturing efficiency is lower, and the slightness hole moulding of central axis is difficulty comparatively; The latter's advantage is that manufacturing efficiency is higher, and the moulding of central axis slightness hole is more or less freely, and shortcoming is that density is lower, can not moulding fixing termination, screw thread processing is difficulty comparatively.Therefore, insulating fastening bolt of the present invention comprises and has the fixedly bolt of termination, perhaps not with the fixing bolt of termination.
As previously mentioned, the described pressure pouring forming method of insulating fastening bolt making method of the present invention comprises: insulating material is extruded under higher temperature in the mould of preheating, the demoulding from mould again after the cooling; Perhaps under lower temperature, insulating material is joined in the mould, then mould is together heated together with insulating material, in heating, apply certain pressure, heat-insulation pressure keeping is after a period of time, the decrease temperature and pressure demoulding.The former comparatively suitable processing thermoplastic insulating material, like nylon, novolac resin etc., the comparatively suitable processing thermosetting insulating material of the latter is like thermosetting phenolic resin, epoxy resin etc.And, can also in above-mentioned insulating material, add reinforcing fiber etc.
The slightness hole of insulating fastening bolt central axis can adopt two kinds of method moulding at least behind the insulating fastening bolt making method moulding by casting of the present invention, and a kind of is to adopt drill bit machine shaping slightness hole, and another kind is to adopt laser beam machining molding long and thin through hole.Obviously, said machine-tooled method comprises employing drill bit machine shaping slightness hole, perhaps adopts laser beam machining molding long and thin through hole.
Claims (2)
1. the making method of an insulating fastening bolt; Employing is machined into insulating fastening bolt central axis molding long and thin through hole after comprising the pressure pouring moulding; It is characterized in that: said pressure pouring moulding comprises: insulating material is extruded under higher temperature in the mould of preheating, the demoulding from mould again after the cooling; Perhaps under lower temperature, insulating material is joined in the mould, then mould is together heated together with insulating material, in heating, apply certain pressure, heat-insulation pressure keeping is after a period of time, the decrease temperature and pressure demoulding.
2. according to the making method of the said insulating fastening bolt of claim 1; It is characterized in that: adopt after the pressure pouring moulding to be machined into insulating fastening bolt central axis molding long and thin through hole; Comprise: adopt drill bit machine shaping slightness hole, perhaps adopt laser beam machining molding long and thin through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251035A CN101725608B (en) | 2009-12-28 | 2009-12-28 | Insulating fastening bolt and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251035A CN101725608B (en) | 2009-12-28 | 2009-12-28 | Insulating fastening bolt and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725608A CN101725608A (en) | 2010-06-09 |
| CN101725608B true CN101725608B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910251035A Active CN101725608B (en) | 2009-12-28 | 2009-12-28 | Insulating fastening bolt and manufacturing method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059765B (en) * | 2010-11-17 | 2013-06-12 | 重庆红岢电力绝缘配件有限责任公司 | Manufacturing method of insulating fastening bolt |
| CN102555245A (en) * | 2012-02-13 | 2012-07-11 | 浙江鼎耐塑胶管阀有限公司 | Method for manufacturing hexagonal all-plastic corrosion-resistant bolt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042964U (en) * | 1988-06-08 | 1989-08-16 | 江左 | Portable hydrogen ion composite eletrode |
| EP1496272A1 (en) * | 2003-07-09 | 2005-01-12 | ELESA S.p.A. | Limited-tightening plastic screw |
| CN101195272A (en) * | 2008-01-08 | 2008-06-11 | 于鹏青 | Plastics pipe interface male thread shaping technique and equipment |
| CN201209748Y (en) * | 2008-05-16 | 2009-03-18 | 中冶天工上海十三冶建设有限公司 | Once grouting locating ring for anchor bolt of equipment |
| CN101813541A (en) * | 2009-12-07 | 2010-08-25 | 哈尔滨电机厂有限责任公司 | Isolation structure for measuring external electric interference signals by pressure fluctuation of hydraulic turbine |
-
2009
- 2009-12-28 CN CN200910251035A patent/CN101725608B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042964U (en) * | 1988-06-08 | 1989-08-16 | 江左 | Portable hydrogen ion composite eletrode |
| EP1496272A1 (en) * | 2003-07-09 | 2005-01-12 | ELESA S.p.A. | Limited-tightening plastic screw |
| CN101195272A (en) * | 2008-01-08 | 2008-06-11 | 于鹏青 | Plastics pipe interface male thread shaping technique and equipment |
| CN201209748Y (en) * | 2008-05-16 | 2009-03-18 | 中冶天工上海十三冶建设有限公司 | Once grouting locating ring for anchor bolt of equipment |
| CN101813541A (en) * | 2009-12-07 | 2010-08-25 | 哈尔滨电机厂有限责任公司 | Isolation structure for measuring external electric interference signals by pressure fluctuation of hydraulic turbine |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10-205507A 1998.08.04 |
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| CN101725608A (en) | 2010-06-09 |
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Effective date of registration: 20161230 Address after: 400000, unit 1, No. 9, Ning Ning Road, Jiangbei District, Chongqing, China 3-1,3-2,3-3 Patentee after: Chongqing Hua Hong Power Equipment Co. Ltd. Address before: 400014 9-6, unit 20, No. two, Zhongshan Road, Yuzhong, Chongqing Patentee before: Chongqing Hongke Transformer Fittings Co., Ltd. |
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Addressee: Chongqing Hongke Transformer Fittings Co., Ltd. Document name: Notification of Passing Examination on Formalities |