CN103794301A - Composite insulator for fuse - Google Patents
Composite insulator for fuse Download PDFInfo
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- CN103794301A CN103794301A CN201410049927.4A CN201410049927A CN103794301A CN 103794301 A CN103794301 A CN 103794301A CN 201410049927 A CN201410049927 A CN 201410049927A CN 103794301 A CN103794301 A CN 103794301A
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- metal fitting
- end metal
- sleeve
- middle hardware
- plug
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Abstract
The invention discloses a composite insulator for a fuse and relates to composite insulators. The composite insulator fuse comprises a core rod. The two ends of the core rod are connected with end hardware fittings, and middle hardware fittings are connected between the two ends. The outer side of the core rod is wrapped by an umbrella-skirt protection sleeve which is not wrapped on the outer side faces of the end hardware fittings and the middle hardware fittings, and the umbrella-skirt protection sleeve is only wrapped on the outer side face of the core rod which is an insulator body. Even though the power-frequency voltage is exerted on the composite insulator for the fuse in a test, saline water films on the surface of the core rod and the surface of the umbrella-skirt protection sleeve will not discharge. Thus, eroded pits occurring on the surface of the umbrella-skirt protection sleeve due to electric power erosion on the umbrella-skirt protection sleeve can be avoided, and the composite insulator for the fuse can be qualified to pass a runner test.
Description
Technical field
The present invention relates to a kind of composite insulator, be specifically related to a kind of fuse composite insulator.
Background technology
Nowadays adopt the composite insulator of the umbrella sheath of silastic material making to be used in large quantities in transmission line and various electric equipment, wherein just comprise fuse, particularly high-tension fuse.The umbrella sheath of the composite insulator that fuse uses at present generally adopts injection molding technique to be made, the structure of existing fuse use composite insulator as shown in Figure 1, it comprises plug, end metal fitting, the umbrella sheath 2 that middle hardware and silastic material are made, end metal fitting comprises end metal fitting connecting rod 31 and end metal fitting sleeve 32 for being connected with plug, middle hardware comprises middle hardware connecting rod 41 and middle hardware sleeve 42, umbrella sheath 2 is coated on plug, in addition, the lateral surface of end metal fitting sleeve 32 and middle hardware sleeve 42, and the part lateral surface of end metal fitting connecting rod 31 and middle hardware connecting rod 41 is also coated by umbrella sheath 2, so that the creepage distance that composite insulator obtains more growing and dry arcing distance.The fuse composite insulator of existing this structure, in use substantially can meet the demands, also can pass through the test of some routines, but, in the time carrying out more harsh runner test, the fuse of existing this structure often cannot be smoothly by test with composite insulator.
As shown in Figure 3, the experimental rig of runner test comprises a runner that is cross shape, four bars of this runner are isometric and be mutually right angle, below runner, be provided with one for holding the brine pit of salt solution, insulator is carried out before runner test, first insulator test product is fixed on a wherein bar of runner, in process of the test, as shown in Figure 3, rotating wheel makes insulator test product successively arrive a position, b position, c position and d position, and respectively stop 40s in each position, this is a cyclic process, in this cyclic process, insulator test product first soaks in a position is placed to the salt solution of brine pit, slightly stop in b position afterwards, then be applied in power-frequency voltage in c position, finally slightly stop in d position, carry out afterwards cyclic process next time, so after iterative cycles 30000 times, runner test finishes.The condition of acceptance of runner test is: 1, occur without playing trace; 2, for composite insulator, deteriorate hole the degree of depth be less than 3mm, and deteriorate hole can not arrive mandrel surface, for resin insulator, deteriorate hole the degree of depth be less than 3mm; 3, umbrella sheath punctures.If the insulator test product of two same design all meets above-mentioned 3 conditions, the insulator pass the test of this design after runner test.
Existing fuse is as shown in Figure 1 defective with composite insulator runner test, and reason is that the fuse composite insulator of existing this structure is not meeting the 2nd article of above-mentioned condition of acceptance after runner test.
Summary of the invention
The object of this invention is to provide a kind of can be qualified in the fuse composite insulator of runner test.
Through test of many times, inventor finds that above-mentioned existing fuse composite insulator is all positioned on the umbrella sheath that is coated on end metal fitting lateral surface and middle hardware lateral surface in the hole of deteriorating that its umbrella sheath surface occurs after runner test, near near the situation of cheating of wherein occurring deteriorating the end of the openend of end metal fitting sleeve and the end of middle hardware sleeve is the most serious, inventor draws through researching and analysing, composite insulator is after saline sook, its surface coverage the brine film of one deck conduction, the end metal fitting of this brine film and composite insulator and middle hardware conducting, therefore in the time applying power-frequency voltage to composite insulator, also there is electromotive force on umbrella sheath surface, but because this brine film is thinner, thickness distribution is also inhomogeneous, therefore the brine film conductive capability on umbrella sheath surface is poor, the electromotive force on umbrella sheath surface is just along the direction decay away from gold utensil (gold utensil comprises end metal fitting and middle hardware), take end metal fitting as example, as shown in Figure 1, the electromotive force on umbrella sheath surface is along the direction decay from e toward f place, be coated on like this between the surface of umbrella sheath of this end metal fitting lateral surface and this end metal fitting and just have electrical potential difference, and this electrical potential difference is increasing progressively toward the direction at f place from e, because there is electrical potential difference, so easy Discharge Phenomena just between the surperficial brine film of this end metal fitting and coated umbrella sheath thereon, just more serious the closer to f place electric discharge phenomena, along with the carrying out of test, in the course of time be coated on umbrella sheath on this end metal fitting surface just easily because electric power corrodes the hole that occurs deteriorating, and the situation in the hole that occurs the closer to f place deteriorating is just more serious.Be coated on umbrella sheath surface on middle hardware occur the deteriorating principle in hole also identical.
Based on above-mentioned analysis, the invention provides following technical scheme.
Fuse composite insulator, comprises plug, and plug two ends are all connected with end metal fitting, is connected with middle hardware between two ends, and mandrel outer side is coated with umbrella sheath, and umbrella sheath is not coated on the lateral surface of end metal fitting and the lateral surface of middle hardware.
Umbrella sheath is no longer coated on the lateral surface of end metal fitting and middle hardware, umbrella sheath is only coated on the lateral surface of plug, and plug is insulator, even if apply power-frequency voltage with composite insulator to when test fuse of the present invention, between the brine film on plug and umbrella sheath surface, also there will not be the phenomenon of electric discharge, therefore avoid making the hole that occurs deteriorating, umbrella sheath surface because electric power corrodes umbrella sheath, thereby fuse of the present invention just can qualifiedly pass through runner test with composite insulator.
Wherein, each end metal fitting includes the end metal fitting sleeve of end metal fitting connecting rod and the hollow for being connected with plug, end metal fitting sleeve one end opening, other end sealing, end metal fitting jacket casing is connected to plug, end and the umbrella sheath of the openend of end metal fitting sleeve join, end metal fitting connecting rod and end metal fitting sleeve are one-body molded, end metal fitting sleeve is provided with the end metal fitting pressure contact portion for crimping end metal fitting sleeve and plug, and the blind end of end metal fitting pressure contact portion and end metal fitting sleeve is in the same side of end metal fitting connecting rod.
Wherein, middle hardware comprises middle hardware connecting rod and middle hardware sleeve for being connected with plug, middle hardware sleeve hollow connects, middle hardware jacket casing is connected to plug, the end at middle hardware sleeve two ends all joins with umbrella sheath, middle hardware connecting rod and middle hardware sleeve are one-body molded, and middle hardware sleeve is only provided with the middle hardware pressure contact portion for crimping middle hardware sleeve and plug in a side of middle hardware connecting rod.
Wherein, the contact-making surface that the end of the openend of end metal fitting sleeve and umbrella sheath join is curved surface, and the contact-making surface that the end at the two ends of middle hardware sleeve and umbrella sheath join is curved surface.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing fuse composite insulator.
Fig. 2 is the structural representation of fuse of the present invention composite insulator.
Fig. 3 is the test principle figure of runner test.
Reference numeral comprises: umbrella sheath 2, end metal fitting connecting rod 31, end metal fitting sleeve 32, end metal fitting pressure contact portion 33, middle hardware connecting rod 41, middle hardware sleeve 42, middle hardware pressure contact portion 43.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
As shown in Figure 2, fuse composite insulator of the present invention, comprise plug (not shown), plug two ends are all connected with end metal fitting, between two ends, be connected with middle hardware, mandrel outer side is coated with umbrella sheath 2, each end metal fitting includes the end metal fitting sleeve 32 of end metal fitting connecting rod 31 and the hollow for being connected with plug, end metal fitting sleeve 32 1 end openings, other end sealing, the end metal fitting sleeve 32 of two end metal fittings is socketed on respectively the two ends of plug, end metal fitting connecting rod 31 is one-body molded with end metal fitting sleeve 32, middle hardware comprises middle hardware connecting rod 41 and middle hardware sleeve 42 for being connected with plug, middle hardware sleeve 42 hollows connect, middle hardware sleeve 42 is socketed on plug, middle hardware connecting rod 41 is one-body molded with middle hardware sleeve 42.As shown in Figure 2, umbrella sheath 2 is not coated on the lateral surface of end metal fitting and the lateral surface of middle hardware, and umbrella sheath 2 only joins with the end of openend of end metal fitting sleeve 32 and the end at the two ends of middle hardware sleeve 42.Umbrella sheath 2 is no longer coated on the lateral surface of end metal fitting and middle hardware, umbrella sheath 2 is only coated on the lateral surface of plug, and plug is insulator, even if apply power-frequency voltage with composite insulator to when test fuse of the present invention, between the brine film on plug and umbrella sheath 2 surfaces, also there will not be the phenomenon of electric discharge, therefore avoid making the hole that occurs deteriorating, umbrella sheath 2 surfaces because electric power corrodes umbrella sheath 2, thereby fuse of the present invention just can qualifiedly pass through runner test with composite insulator.
End metal fitting sleeve 32 is provided with the end metal fitting pressure contact portion 33 for crimping end metal fitting sleeve 32 and plug, middle hardware sleeve 42 is provided with the middle hardware pressure contact portion 43 for crimping middle hardware sleeve 42 and plug, use in the process of composite insulator at production fuse of the present invention, after end metal fitting and middle hardware and plug connect, middle hardware sleeve 42 covers by middle hardware are received on plug, and the end metal fitting sleeve 32 of two end metal fittings is overlapped and received behind the two ends of plug respectively, also need to use press-connection machine to carry out crimping to end metal fitting pressure contact portion 33 and middle hardware pressure contact portion 43, to allow end metal fitting and plug, middle hardware is firmly connected with plug.The end metal fitting connecting rod 31 of two end metal fittings is parallel to each other, according to specification requirement, the distance of the end metal fitting connecting rod 31 of two end metal fittings is fixed values, if the end metal fitting of composite insulator and the structure of middle hardware for existing fuse shown in employing Fig. 1, and umbrella sheath 2 is not coated on the words of the lateral surface of end metal fitting and middle hardware, the dry arcing distance of composite insulator is just not up to standard, therefore, fuse of the present invention suitably lengthens the length of plug with composite insulator, again the blind end of the end metal fitting pressure contact portion 33 of end metal fitting and end metal fitting sleeve 32 is arranged on to the same side of end metal fitting connecting rod 31, fuse of the present invention is only provided with the middle hardware pressure contact portion 43 for crimping middle hardware sleeve 42 and plug in a side of middle hardware connecting rod 41 with the middle hardware sleeve 42 of the middle hardware of composite insulator simultaneously, to increase the dry arcing distance of composite insulator, thereby meet the requirement of fuse composite insulator dry arcing distance.
Further, the contact-making surface that the end of the openend of end metal fitting sleeve 32 and umbrella sheath 2 join is curved surface, the contact-making surface that the end at the two ends of middle hardware sleeve 42 and umbrella sheath 2 join is curved surface, to prevent that steam in atmosphere from penetrating into mandrel surface from the end at the two ends of the end of the openend of end metal fitting sleeve 32 and contact-making surface that umbrella sheath 2 joins and middle hardware sleeve 42 and the contact-making surface that umbrella sheath 2 joins easily.
Table 1 is the runner test result contrast of the test product of 4 same design of existing fuse composite insulator as shown in Figure 1 and the test product of 2 same design of fuse of the present invention composite insulator.
Composite insulator test product and the contrast of fuse of the present invention composite insulator test product runner test result for the existing fuse of table 1.
Hence one can see that, and fuse of the present invention, with the hole that do not occur deteriorating, composite insulator full skirt surface after runner test, has therefore passed through runner test smoothly.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (4)
1. fuse composite insulator, comprises plug, and plug two ends are all connected with end metal fitting, between two ends, be connected with middle hardware, mandrel outer side is coated with umbrella sheath, it is characterized in that, umbrella sheath is not coated on the lateral surface of end metal fitting and the lateral surface of middle hardware.
2. fuse composite insulator according to claim 1, it is characterized in that, each end metal fitting includes the end metal fitting sleeve of end metal fitting connecting rod and the hollow for being connected with plug, end metal fitting sleeve one end opening, other end sealing, end metal fitting jacket casing is connected to plug, end and the umbrella sheath of the openend of end metal fitting sleeve join, end metal fitting connecting rod and end metal fitting sleeve are one-body molded, end metal fitting sleeve is provided with the end metal fitting pressure contact portion for crimping end metal fitting sleeve and plug, the blind end of end metal fitting pressure contact portion and end metal fitting sleeve is in the same side of end metal fitting connecting rod.
3. fuse composite insulator according to claim 1 and 2, it is characterized in that, middle hardware comprises middle hardware connecting rod and middle hardware sleeve for being connected with plug, middle hardware sleeve hollow connects, middle hardware jacket casing is connected to plug, the end at middle hardware sleeve two ends all joins with umbrella sheath, middle hardware connecting rod and middle hardware sleeve are one-body molded, and middle hardware sleeve is only provided with the middle hardware pressure contact portion for crimping middle hardware sleeve and plug in a side of middle hardware connecting rod.
4. fuse composite insulator according to claim 3, it is characterized in that, the contact-making surface that the end of the openend of end metal fitting sleeve and umbrella sheath join is curved surface, and the contact-making surface that the end at the two ends of middle hardware sleeve and umbrella sheath join is curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049927.4A CN103794301B (en) | 2014-02-13 | 2014-02-13 | Fuse composite insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049927.4A CN103794301B (en) | 2014-02-13 | 2014-02-13 | Fuse composite insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103794301A true CN103794301A (en) | 2014-05-14 |
| CN103794301B CN103794301B (en) | 2016-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049927.4A Active CN103794301B (en) | 2014-02-13 | 2014-02-13 | Fuse composite insulator |
Country Status (1)
| Country | Link |
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| CN (1) | CN103794301B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304231A (en) * | 2015-11-13 | 2016-02-03 | 周海兵 | Composite insulator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2278993Y (en) * | 1996-06-14 | 1998-04-15 | 史鹤亭 | High voltage combined drop-down fuse |
| US20040184210A1 (en) * | 2002-12-19 | 2004-09-23 | Lynch Michael D. | Method and apparatus for protection of wildlife from contact with power phase cutout mechanism |
| CN2717003Y (en) * | 2004-08-13 | 2005-08-10 | 鞍山兰陵电器有限公司 | Three-station AC high-voltage drop type fuse |
| CN101208758A (en) * | 2005-04-04 | 2008-06-25 | 电力研究所有限公司 | Indicators for early detection of potential failures due to water exposure of polymer-clad fiberglass |
| CN202042292U (en) * | 2011-04-02 | 2011-11-16 | 武汉雷泰电力科技发展有限公司 | Composite jacket pillar insulator for 35kV and below voltage dropout fuse |
| CN202423198U (en) * | 2012-01-11 | 2012-09-05 | 刘进生 | Fixed type outdoor drop-out fuse |
| CN203351300U (en) * | 2013-06-26 | 2013-12-18 | 东莞市高能电气股份有限公司 | Composite insulator for high voltage fuse |
| CN203721394U (en) * | 2014-02-13 | 2014-07-16 | 长园高能电气股份有限公司 | Composite insulator for fuse protector |
-
2014
- 2014-02-13 CN CN201410049927.4A patent/CN103794301B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2278993Y (en) * | 1996-06-14 | 1998-04-15 | 史鹤亭 | High voltage combined drop-down fuse |
| US20040184210A1 (en) * | 2002-12-19 | 2004-09-23 | Lynch Michael D. | Method and apparatus for protection of wildlife from contact with power phase cutout mechanism |
| CN2717003Y (en) * | 2004-08-13 | 2005-08-10 | 鞍山兰陵电器有限公司 | Three-station AC high-voltage drop type fuse |
| CN101208758A (en) * | 2005-04-04 | 2008-06-25 | 电力研究所有限公司 | Indicators for early detection of potential failures due to water exposure of polymer-clad fiberglass |
| CN202042292U (en) * | 2011-04-02 | 2011-11-16 | 武汉雷泰电力科技发展有限公司 | Composite jacket pillar insulator for 35kV and below voltage dropout fuse |
| CN202423198U (en) * | 2012-01-11 | 2012-09-05 | 刘进生 | Fixed type outdoor drop-out fuse |
| CN203351300U (en) * | 2013-06-26 | 2013-12-18 | 东莞市高能电气股份有限公司 | Composite insulator for high voltage fuse |
| CN203721394U (en) * | 2014-02-13 | 2014-07-16 | 长园高能电气股份有限公司 | Composite insulator for fuse protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304231A (en) * | 2015-11-13 | 2016-02-03 | 周海兵 | Composite insulator |
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| Publication number | Publication date |
|---|---|
| CN103794301B (en) | 2016-09-28 |
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