CN101916633B - Method for improving twisting resistance of composite coating lightning arrester, lightning arrester and manufacturing method thereof - Google Patents
Method for improving twisting resistance of composite coating lightning arrester, lightning arrester and manufacturing method thereof Download PDFInfo
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- CN101916633B CN101916633B CN2010102231036A CN201010223103A CN101916633B CN 101916633 B CN101916633 B CN 101916633B CN 2010102231036 A CN2010102231036 A CN 2010102231036A CN 201010223103 A CN201010223103 A CN 201010223103A CN 101916633 B CN101916633 B CN 101916633B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 180
- 239000002184 metal Substances 0.000 claims abstract description 180
- 238000009413 insulation Methods 0.000 claims abstract description 62
- 150000001875 compounds Chemical class 0.000 claims description 22
- 229910044991 metal oxide Inorganic materials 0.000 claims description 13
- 150000004706 metal oxides Chemical class 0.000 claims description 13
- 239000003365 glass fiber Substances 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 238000005987 sulfurization reaction Methods 0.000 claims description 7
- 239000008358 core component Substances 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
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- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 238000009826 distribution Methods 0.000 description 2
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- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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Abstract
The invention discloses a method for improving the twisting resistance of a composite coating lightning arrester, a lightning arrester and a manufacturing method thereof. The lightning arrester comprises an upper metal electrode, a non-linear resistor chip and a lower metal electrode which are connected with one another in turn, wherein an insulation framework is arranged on the outer walls of the upper metal electrode, the lower metal electrode and the non-linear resistor chip; a composite coating is arranged outside the upper metal electrode, the lower metal electrode, the non-linear resistor chip and the insulation framework; an upper conductive pole and an upper fastener are arranged on the upside of the upper metal electrode; a lower conductive pole and a lower fastener are arranged on the downside of the lower metal electrode; the cross section of the middle part of the upper metal electrode is polygonal; and the contact part of the insulation framework and the upper metal electrode is matched with the shape of the upper metal electrode. The invention has the advantages of greatly improving the performance for enduring the big torque of medium-voltage composite coating lightning arresters, reducing the failure rate of the composite lightning arresters under the action of possible over-large tensional moment in mounting and fixing process, such as electrode rotation, seal damage and the like, and improving the operation reliability thereof in power grid.
Description
Technical field
The present invention relates to a kind of method, lightning arrester and manufacturing approach that improves twisting resistance of composite coating lightning arrester; Said lightning arrester refers in particular to a kind of high-strength compound overcoat metal oxide arrester; It generally is applied to 10～20kV electric power system distribution or power station; As atmospheric over-voltage and system's internal overvoltage protection equipment, belong to the manufacturing of power transmission and transformation equipment, application.
Background technology
The middle typical mounting means of polymeric metal oxide surge arrester in distribution or power station application of pressing is shown in accompanying drawing 4 and accompanying drawing 5.The lightning arrester lower end is fixed on the steel cross-arm 61 of electric pole through following securing member 15-11, is fixed in the upper end of lightning arrester through last securing member 15-21 by the high-voltage connection of protection system.The connection of lightning arrester upper and lower end must be gone up securing member 15-21 through screwing and just can be fixedly secured with following securing member 15-11, mechanical strength that needs in the time of could guaranteeing lightning arrester work and reliable electric connection; And on screwing in the process of securing member 15-21 and following securing member 15-11; The afterburning nominal direction of the main core line that lightning arrester is fixing and screw down securing member 15-11 and last securing member 15-21 at an angle of 90; So the time by following metal electrode 11-11, go up metal electrode 11-12, non-linear resistor 121, insulation framework 131, the lightning arrester core body of compositions such as securing member 15-11 and last securing member 15-21 bears than torsional moment effect greatly down.
When the lightning arrester lower end was fastening, the conduction of this moment of torsion was formed the conduction chain by composite sheath 141 bottoms, following metal electrode 11-11, following securing member 15-11, and its conducting piece negligible amounts, conduction are apart from shorter, and be less to the torque failure effect of lightning arrester.After the lightning arrester lower end is fastening during fastening again upper end, the conduction of this moment of torsion by composite sheath 141, go up metal electrode 11-21 and down metal electrode 11-11, insulation framework 131, go up securing member 15-21 and form and conduct chain; The clamp load torque that the installer applies last securing member 15-21 is accomplished through the steel cross-arm 61 (fixed pedestal) that insulation skeleton 131, following metal electrode 11-11 are transmitted to electric pole through last metal electrode 11-21; At this moment, effective conduction of tightening torque power depends primarily on the adhesion of metal electrode 11-21 and insulation framework 131, insulation framework 131 and following metal electrode 11-11.
When tightening torque power≤when going up the adhesion of metal electrode 11-21 and insulation framework 131, tightening torque power is transmitted to the steel cross-arm 61 of electric pole and normally accomplishes the harmless installation of lightning arrester through insulation skeleton 131, following metal electrode 11-11 through last metal electrode 11-21; When tightening torque power＞when going up the adhesion of metal electrode 11-11 and insulation framework 131; Slippage takes place between last metal electrode 11-11 and the insulation framework 131; The core body overall structure is destroyed, and the sealing property of lightning arrester is descended, and this type of lightning arrester is installed as and diminishes installation.
Metal electrode 11-21 and following metal electrode 11-11 on the conventional structure; See accompanying drawing 4; Each cross section is circular; The insulation framework shape also is circular in company with metal electrode, and then the adhesion of circular metal electrode and round insulation skeleton is mainly the frictional force between two, also is that the maximum of conventional circular electrode, insulation framework structure polymeric housed metal oxide arrester allows tightening torque power to depend on the frictional force between metal electrode and the insulation framework; And frictional force F=μ N μ is a coefficient of friction; N is a normal pressure; Coefficientoffriction is relevant with material, contact-making surface degree of roughness, and the μ of metal electrode and insulation framework is all little usually; The general cure shrinkage power that forms when the suffered normal pressure N of electrode and insulation framework is merely the insulation framework curing molding in the lightning arrester core body, also little; So the permission tightening torque power of conventional circular electrode, insulation framework structure lightning arrester is less, required tightening torque power when installing less than lightning arrester usually.And the free-hand completion of simple tool such as spanner are almost all passed through in this fastening operation at the scene by the installer, and spanner length, individual strength size etc. all influences this tightening torque power, and actual torque power is dispersed big obvious; Be generally and guarantee that wiring is fastening reliable, it has been ordinary affair that lightning arrester suffered to turn round.So installation centering presses polymeric housed metal oxide arrester damage phenomenon in various degree very general, also be the middle at present higher major reason of total failare rate more than 60% that account for of compound lightning arrester seal failure rate of pressing.
Summary of the invention
The objective of the invention is to solve and press polymeric metal oxide surge arrester tolerance torsional forces less than normal in present domestic conventional circular electrode, the round insulation skeleton; Occur the problem that electrode rotation, seal break-off etc. damage in various degree in the installation easily, a kind of method that improves twisting resistance of composite coating lightning arrester is provided.
Second purpose of the present invention provides a kind of tolerance torsional forces, and compound lightning arrester spoilage descends when making installation fastening, and the middle pressure polymeric housed metal oxide arrester that raising has a large capacity and a wide range is at the high-strength compound coat lightning arrester of the operational reliability of electrical network.
The 3rd purpose of the present invention provides a kind of manufacturing approach of high-strength compound coat lightning arrester.
Technical scheme of the present invention is: a kind of method that improves twisting resistance of composite coating lightning arrester; Include successively connect on metal electrode, non-linear resistor and following metal electrode; Be provided with insulation framework on the outer wall of metal electrode, non-linear resistor and following metal electrode on said; Be provided with composite sheath in the said insulation framework outside; And last metal electrode be connected with conducting rod and on securing member; Be connected with down conducting rod with following metal electrode and go up in the polymeric housed metal oxide arrester of securing member, the Cross-section Design that goes up the mid portion of metal electrode to the major general is a polygon, said insulation framework contact with last the metal electrode shape of part and the structure that the said upward profile of metal electrode matches; Outer wall through last metal electrode mid portion and the insulation framework plane contact that part constitutes that contacts with last metal electrode is to improve twisting resistance of composite coating lightning arrester intensity.
Design a kind of high-strength compound coat lightning arrester; Comprise metal electrode and following metal electrode; Between last metal electrode and following metal electrode, be provided with the non-linear resistor of several series connection; On said metal electrode, be provided with insulation framework on the outer wall of metal electrode and non-linear resistor down; On said metal electrode, metal electrode, non-linear resistor and the insulation framework outside are provided with composite sheath down, on said the metal electrode upper end be fixedly connected with said on metal electrode coaxial, and protrude from the last conducting rod of composite sheath upper end; Be fixedly connected with in said down metal electrode lower end with said metal electrode is coaxial down, and protrude from the following conducting rod of composite sheath lower end; The said conducting rod of going up is provided with securing member, and said conducting rod down is provided with down securing member; The said cross section of going up the mid portion of metal electrode is a polygon, and said insulation framework and the contacted part of last metal electrode match with the said profile that goes up metal electrode.
As to improvement of the present invention, the said cross section of the mid portion of metal electrode down is a polygon, and said insulation framework and the contacted part of following metal electrode match with the said profile of metal electrode of descending.
Said polygon is a regular polygon.
Said regular polygon is in positive triangle to the dodecagon.
As to further improvement of the present invention, the height overall H that the said height h that goes up the mid portion of metal electrode accounts for metal electrode is not less than 40%; The height overall H that the said height h of the mid portion of metal electrode down accounts for down metal electrode is not less than 40%.
Said insulation framework is processed with glass fiber tape.
Compression strength >=the 100Mpa of said insulation framework.
Said composite sheath is processed with the silicone rubber compounds sulfuration.
Per two adjacent edges of said polygon are that circular arc seamlessly transits.
The present invention provides a kind of manufacturing approach of polymeric housed metal oxide arrester, comprises the steps,
(1), goes up metal electrode or the making of metal electrode down
After the metal thawing, pouring the shape of cross section of casting mid portion in the mould into is that polygonal upward metal electrode or following metal electrode hair are bad;
With bad metal electrode or the following metal electrode of being machined to of hair;
Conducting rod on last metal electrode is fixedly connected, conducting rod under connecting on the following metal electrode;
(2) making of lightning arrester core core component
To go up metal electrode, non-linear resistor and following metal electrode successively fixes;
To tightly be wound on metal electrode, non-linear resistor and the following metal electrode by the following glass fiber tape of the soft attitude in place of the normal temperature of dipping adhesive again, and pressurization, a 80-160 ℃ segmentation are finalized the design after being heating and curing; Naturally cool to room temperature and go out baking;
(3), the making of composite sheath
Lightning arrester core core component is placed particular manufacturing craft, and in mould, the composite sheath moulding is accomplished in whole sulfuration under 155-165 ℃ of condition with silicone rubber compounds;
(4), load onto securing member at last conducting rod, securing member under loading onto on the following conducting rod.
The present invention changes the circular electrode in the lightning arrester core body, round insulation skeleton into polygon prismatic metal electrode, polygon prismatic insulation framework; Make the maximum permissible torque power of conducting between metal electrode and the insulation framework depend on the yield strength and the insulation framework YIELD STRENGTH of metal electrode material; Thereby improved the tolerance torsional forces of lightning arrester; Make and install that compound lightning arrester spoilage descends when fastening, improved the middle pressure polymeric housed metal oxide arrester that has a large capacity and a wide range in the operational reliability of electrical network.
Description of drawings
Fig. 1 is the planar structure sketch map of an embodiment of the present invention.
Fig. 2 is the A-A/B-B planar structure sketch map among Fig. 1.
Fig. 3 is the side structure sketch map of the metal electrode among Fig. 1.
Fig. 4 is the planar structure sketch map of existing lightning arrester.
Fig. 5 is the C-C/D-D planar structure sketch map among Fig. 4.
Embodiment
In conjunction with Fig. 1 and Fig. 2; A kind of method that improves twisting resistance of composite coating lightning arrester provided by the invention; Including metal electrode 11, non-linear resistor 2 and following metal electrode 12 in the connection successively; Be provided with insulation framework 3 on the outer wall of metal electrode 11, non-linear resistor 2 and following metal electrode 12 on said; Be provided with composite sheath 4 in said insulation framework 3 outsides, and last metal electrode 11 be connected with conducting rod 21 and on securing member 5-2 and following metal electrode 12 be connected with conducting rod 22 down and in the polymeric housed metal oxide arrester of securing member 5-1; The Cross-section Design that goes up the mid portion of metal electrode 11 to the major general is a polygon; Contact with last metal electrode 11 plane contact of part formation of said insulation framework 3 structure that shape and the said profile that goes up metal electrode 11 of part matches that contacts with last metal electrode 11, outer wall and the insulation framework 3 through last metal electrode 11 mid portions is with raising twisting resistance of composite coating lightning arrester intensity.
See also Fig. 1 to Fig. 2; It is a kind of high-strength compound coat lightning arrester; Comprise metal electrode 11 and following metal electrode 12; Between last metal electrode 11 and following metal electrode 12, be provided with the non-linear resistor 2 of two series connection, on said metal electrode 11, be provided with insulation framework 3 on the outer wall of metal electrode 12 and non-linear resistor 2 down, on said metal electrode 11, metal electrode 12, non-linear resistor 2 and insulation framework 3 outsides are provided with composite sheath 4 down; On said metal electrode 11 upper ends be fixedly connected with said on metal electrode 11 coaxial; And protrude from the last conducting rod 21 of composite sheath 4 upper ends, be fixedly connected with in said down metal electrode 12 lower ends with said metal electrode 12 is coaxial down, and protrude from the following conducting rod 22 of composite sheath 4 lower ends; The said conducting rod 21 of going up is provided with securing member 5-2, and said conducting rod 22 down is provided with down securing member 5-1; The said cross section of going up the mid portion of metal electrode 11 is a polygon; Be preferably octagon; The mid portion of promptly going up metal electrode 11 is eight prisms, and eight prisms are made up of two parts, and its both diameter is unequal; Said insulation framework 3 and last metal electrode 11 contacted parts match with the said profile that goes up metal electrode 11.
In the present embodiment; The said cross section of the mid portion of metal electrode 12 down is a polygon, is preferably octagon, and the mid portion that promptly descends metal electrode 12 is eight prisms; And eight prisms are made up of two parts; Its both diameter is unequal, and said insulation framework 3 and following metal electrode 12 contacted parts match with the said profile of metal electrode 12 down.
Obviously, the cross section of the mid portion of last metal electrode 11 also can be the inequilateral polygon, perhaps is regular polygon.When it is regular polygon, can select a regular polygon in positive triangle to the dodecagon.In the present embodiment, said insulation framework 3 usefulness glass fiber tapes are processed.Compression strength >=the 100Mpa of said insulation framework 3.Said composite sheath 4 usefulness silicone rubber compounds sulfuration is processed.Per two adjacent edges of said polygon are that circular arc seamlessly transits, the dissection of electrode pair insulation framework when avoiding lightning arrester core body to bear torsion and make insulation framework impaired.Securing member among the present invention is a nut.
See also Fig. 3, preferential in order to strengthen going up the bond strength of metal electrode 11 and following metal electrode 12 (close be made by aluminium) and insulation framework 3, said on the height h of mid portion of the metal electrode 11 height overall H that accounts for metal electrode 11 be not less than 40%; The height overall H that the said height h of the mid portion of metal electrode 12 down accounts for down metal electrode 12 is not less than 40%.
Among the present invention, said insulation framework 3 tightly is wound in core body metal electrode+non-linear resistor+metal electrode by dipping adhesive glass fiber tape (normal temperature is the soft attitude in place down), and pressurization, being heating and curing forms; Two ends eight prismatic structure of insulation framework produce when dipping glue glass fibre belt twines electrode, and typing after pressurization, a 80-160 ℃ segmentation are heating and curing naturally cools to room temperature and goes out baking; The actual use of insulation framework compression strength >=100MPa.
Said composite sheath 4 is that the lightning arrester core body with the insulation framework good solidification places particular manufacturing craft, makes the proper amount of silicon rubber size in mould, accomplish the composite sheath moulding with 155-165 ℃ of whole sulfuration.
Principle of the present invention, performance, effect comparison:
Visible from last table measured data, structure tolerance torque capability of the present invention can improve 3-5 doubly than present conventional structure lightning arrester.
The manufacturing approach of a kind of polymeric housed metal oxide arrester provided by the invention comprises the steps,
(1), goes up metal electrode or the making of metal electrode down
After the metal thawing, pouring the shape of cross section of casting mid portion in the mould into is that polygonal upward metal electrode or following metal electrode hair are bad;
With bad metal electrode or the following metal electrode of being machined to of hair;
Conducting rod on last metal electrode is fixedly connected, conducting rod under connecting on the following metal electrode;
(2) making of lightning arrester core core component
To go up metal electrode, non-linear resistor and following metal electrode successively fixes;
To tightly be wound on metal electrode, non-linear resistor and the following metal electrode by the following glass fiber tape of the soft attitude in place of the normal temperature of dipping adhesive again, and pressurization, a 80-160 ℃ segmentation are finalized the design after being heating and curing; Naturally cool to room temperature and go out baking;
(3), the making of composite sheath
Lightning arrester core core component is placed particular manufacturing craft, and in mould, the composite sheath moulding is accomplished in whole sulfuration under 155-165 ℃ of condition with silicone rubber compounds;
(4), load onto securing member at last conducting rod, securing member under loading onto on the following conducting rod.
Among the present invention, every pressure, temperature does not provide occurrence, all is pressure, the temperature value of employed routine of the same trade.
Claims (10)
1. method that improves twisting resistance of composite coating lightning arrester; It is characterized in that: include successively connect on metal electrode (11), non-linear resistor (2) and following metal electrode (12); Be provided with insulation framework (3) on the outer wall of metal electrode (11), non-linear resistor (2) and following metal electrode (12) on said; Be provided with composite sheath (4) in said insulation framework (3) outside; And be connected with conducting rod (21) at last metal electrode (11); Be provided with securing member (5-2) on the conducting rod (21) on said, following metal electrode (12) is connected with down conducting rod (22), on said conducting rod (22) down, is provided with in the polymeric housed metal oxide arrester of securing member (5-1) down; The Cross-section Design that goes up the mid portion of metal electrode (11) to the major general is a polygon; Contact with last metal electrode (11) plane contact of part formation of said insulation framework (3) structure that shape and the said profile that goes up metal electrode (11) of part matches that contacts with last metal electrode (11), outer wall and the insulation framework (3) through last metal electrode (11) mid portion is with raising twisting resistance of composite coating lightning arrester intensity.
2. high-strength compound coat lightning arrester; Comprise metal electrode (11) and following metal electrode (12); Between last metal electrode (11) and following metal electrode (12), be provided with the non-linear resistor (2) of several series connection; On said metal electrode (11), be provided with insulation framework (3) on the outer wall of metal electrode (12) and non-linear resistor (2) down; On said metal electrode (11), metal electrode (12), non-linear resistor (2) and insulation framework (3) outside are provided with composite sheath (4) down, metal electrode (11) upper end is fixedly connected with said to go up metal electrode (11) coaxial on said, and protrudes from the last conducting rod (21) on the composite sheath (4); Be fixedly connected with in said down metal electrode (12) lower end with said metal electrode (12) is coaxial down, and protrude from the following conducting rod (22) of composite sheath (4) lower end; The said conducting rod (21) of going up is provided with securing member (5-2), and said conducting rod (22) down is provided with down securing member (5-1); It is characterized in that: the said cross section of going up the mid portion of metal electrode (11) is a polygon, and contact with last metal electrode (11) shape of part and the profile of said last metal electrode (11) of said insulation framework (3) matches.
3. high-strength compound coat lightning arrester according to claim 2; It is characterized in that: the cross section of the mid portion of said down metal electrode (12) is a polygon, and contact with following metal electrode (12) shape and the said profile of metal electrode (12) of descending of part of said insulation framework (3) matches.
4. according to claim 2 or 3 described high-strength compound coat lightning arresters, it is characterized in that: said polygon is a regular polygon.
5. high-strength compound coat lightning arrester according to claim 4 is characterized in that: said regular polygon is in positive triangle to the dodecagon.
6. high-strength compound coat lightning arrester according to claim 5; It is characterized in that: the height overall (H) that the said height (h) of going up the mid portion of metal electrode (11) accounts for metal electrode (11) is not less than 40%, or/and the height overall (H) that the said height (h) of the mid portion of metal electrode (12) down accounts for down metal electrode (12) is not less than 40%.
7. according to claim 5 or 6 described high-strength compound coat lightning arresters, it is characterized in that: said insulation framework (3) is processed with glass fiber tape, and said composite sheath (4) is processed with the silicone rubber compounds sulfuration.
8. high-strength compound coat lightning arrester according to claim 7 is characterized in that: the compression strength >=100Mpa of said insulation framework (3).
9. high-strength compound coat lightning arrester according to claim 8 is characterized in that: per two adjacent edges of said polygon are that circular arc seamlessly transits.
10. the manufacturing approach of a polymeric housed metal oxide arrester is characterized in that: comprises the steps,
(1), goes up metal electrode or the making of metal electrode down
After the metal thawing, pouring the shape of cross section of casting mid portion in the mould into is that polygonal upward metal electrode or following metal electrode hair are bad;
With bad metal electrode or the following metal electrode of being machined to of hair;
Conducting rod on last metal electrode is fixedly connected, conducting rod under connecting on the following metal electrode;
(2) making of lightning arrester core core component
To go up metal electrode, non-linear resistor and following metal electrode successively fixes; To be in the glass fiber tape of soft attitude under the normal temperature by the dipping adhesive again, and tightly be wound on metal electrode, non-linear resistor and the following metal electrode, and pressurization, a 80-160 ℃ segmentation are heating and curing and afterwards finalize the design; Naturally cool to room temperature and go out baking;
(3), the making of composite sheath
Lightning arrester core core component is placed particular manufacturing craft, and in mould, the composite sheath moulding is accomplished in whole sulfuration under 155-165 ℃ of condition with silicone rubber compounds;
(4), load onto securing member at last conducting rod, securing member under loading onto on the following conducting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102231036A CN101916633B (en) | 2010-07-08 | 2010-07-08 | Method for improving twisting resistance of composite coating lightning arrester, lightning arrester and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102231036A CN101916633B (en) | 2010-07-08 | 2010-07-08 | Method for improving twisting resistance of composite coating lightning arrester, lightning arrester and manufacturing method thereof |
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| CN101916633B true CN101916633B (en) | 2012-05-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9484123B2 (en) | 2011-09-16 | 2016-11-01 | Prc-Desoto International, Inc. | Conductive sealant compositions |
| CN103000322B (en) * | 2012-12-05 | 2016-04-06 | 中国西电电气股份有限公司 | High pressure polymeric housed metal oxide arrester forming method |
| US11380464B2 (en) | 2018-01-18 | 2022-07-05 | Hitachi Energy Switzerland Ag | Surge arrester and associated manufacturing method |
| CN109449763B (en) * | 2018-09-18 | 2020-09-11 | 武汉水院电气有限责任公司 | Manufacturing method of multi-cavity gap lightning arrester |
| CN109412022B (en) * | 2018-09-18 | 2020-01-17 | 武汉水院电气有限责任公司 | Bonding process of spherical electrode and insulating rubber |
| CN109346254A (en) * | 2018-10-23 | 2019-02-15 | 襄阳市三三电气有限公司 | Pressure discharges the distribution type arrester that no-spark generates |
| CN111668013B (en) * | 2020-06-01 | 2021-09-07 | 宁波高思超导技术有限公司 | Production process of skeleton structure of liquid helium-free superconducting magnet coil |
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| JP2001023807A (en) * | 1999-07-09 | 2001-01-26 | Toshiba Corp | Lightning arrester and manufacture thereof |
| JP2004071972A (en) * | 2002-08-08 | 2004-03-04 | Otowa Denki Kogyo Kk | Lightning arrester |
| CN201707989U (en) * | 2010-07-08 | 2011-01-12 | 深圳市银星电气股份有限公司 | High-strength polymeric housed lightning arrester |
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