CN101866729A - Intermediate grading ring and composite insulator with same - Google Patents
Intermediate grading ring and composite insulator with same Download PDFInfo
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- CN101866729A CN101866729A CN201010195406A CN201010195406A CN101866729A CN 101866729 A CN101866729 A CN 101866729A CN 201010195406 A CN201010195406 A CN 201010195406A CN 201010195406 A CN201010195406 A CN 201010195406A CN 101866729 A CN101866729 A CN 101866729A
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Abstract
The invention discloses an intermediate grading ring and a composite insulator with the same, and relates to the field of insulators of a high-tension power transmission and transformation system. The composite insulator with the intermediate grading ring is characterized in that at least one intermediate grading ring is arranged outside the core body of the composite insulator or at the position of a shed housing; the intermediate grading ring is formed by connecting a metal ring-shaped grading body, an insulating assembly and an insulating connecting piece, and the outward extending insulating connecting piece on the insulating assembly which is matched with the assembly part of corresponding equipment is connected with the metal ring-shaped grading body to form the grading ring. The intermediate grading ring and the composite insulator with the same can improve the homogeneity of electric field distribution, and improve the electric performance, the aging performance and the reliability of the system.
Description
Technical field
The invention belongs to the high voltage technique field, refer more particularly to composite insulator and pressure-equalizing device thereof in the high voltage power transmission and transforming system.
Background technology
Composite insulator is made up of being connected gold utensil and connecting the grading ring of installing on the gold utensil of the outer insulating sleeve that coats of core body, core body and full skirt, core body two ends, and composite insulator is high-strength because of its light weight, good electrical property, be easy to advantage such as maintenance and be extensive use of by electric power system.Raising along with the power transmission and transformation system electric pressure, the structure length of the composite insulator that uses in the system is linear growth, make the distribution of the electric field vertically of composite insulator trend towards more inhomogeneous, can adopt the mode that increases target to increase the own electric capacity of composite insulator to improve the inhomogeneities of this Electric Field Distribution, for example the patent No. is the utility model " composite insulator that interior umbrella skirt construction is arranged " of ZL200320115427.3, a kind of solution that full skirt in the metal is set in the full skirt of composite insulator is just proposed, but because the limitation of composite insulator full skirt self, the physical dimension of the interior full skirt of establishing in it is less, and is limited for the effect of the increase of composite insulator selfcapacity.
Summary of the invention
At above problem, technical problem to be solved by this invention provides a kind of composite insulator and middle grading ring that middle grading ring is arranged, with the little and extremely uneven problem of Electric Field Distribution vertically of the selfcapacity that solves existing composite insulator, improve the reliability of power transmission and transformation system.In order to overcome the above problems, technical scheme of the present invention is: grading ring in the middle of a kind of, it is characterized in that: connect and compose by metal ring grading body, insulating mounting part and insulated connecting piece, have with the suitable insulating mounting part in relevant device installation position on outward extending insulated connecting piece be connected with the metal ring grading body and constitute in the middle of grading ring.
It is characterized in that: the metal ring grading body is coated with insulating barrier; The outer insulating barrier that coats of metal ring grading body is formed by the compound coating of two or more different materials layering.
It is characterized in that: the insulated connecting piece of middle grading ring constitutes by two sections, and one section is connected with the insulating mounting part, and one section is connected with the metal ring grading body, and two sections insulated connecting piece are connected with bonding or bolt, rivet class mechanical connection manner.
It is characterized in that: the metal ring grading body is put together by two semicircular grading bodies.
A kind of composite insulator that middle grading ring is arranged, by the connection gold utensil at the outer umbrella sheath that coats of core body, core body, core body two ends be installed on the metal grading ring that is connected on the gold utensil and constitute, it is characterized in that: core body external shed sheath position is equipped with an above-mentioned centre grading ring at least; The insulating mounting part of middle grading ring is connected with the geomery of core body or sheath is suitable and tight.
It is characterized in that: the metal surface that composite insulator connects the ring-type grading body of the grading ring of installing on the gold utensil is coated with insulating barrier, the part or all of metal surface of the connector that is connected with the ring-type grading body is coated with insulating barrier, its insulating barrier begins to coat to connector extension the metal surface of connector from the surface coated insulating barrier of ring-type grading body, and the striking gold utensil is installed.
Existing composite insulator, particularly the clavate composite insulator of the above electric pressure of 110KV moves in the line all to connect on the gold utensil at it when using grading ring is installed, a purpose of grading ring is to suppress local bloom field intensity to satisfy the requirement of not bloom, another purpose is grading ring to be made arc-initiating device use, and makes electrical discharge arc leave the full skirt surface of composite insulator and makes it not be subjected to burning of electric arc; At the circuit of voltage levels, porcelain, glass, the composite insulator that use in the power station, also can on the connection gold utensil, grading ring be installed.As if the composite insulator of present this band grading ring has reached above-mentioned purpose on the surface, but fundamentally do not improve in fact along the uneven problem of composite insulator axial electric field distributed pole, the hidden danger of bringing is: the problems such as aging, pollution flashover, electrical property instability that are in composite insulator in the severe non-uniform electric field, and along with social development, the compact power transmission network has proposed to reduce the requirement of structure height to insulator, is insoluble at present.Grading ring is connected and composed by metal ring grading body, insulating mounting part and insulated connecting piece in the middle of of the present invention, have with the suitable insulating mounting part in relevant device installation position on outward extending insulated connecting piece be connected with the metal ring grading body and constitute in the middle of grading ring, it is simple and reasonable, function with the selfcapacity that increases apparatus insulated part, effectively uniform its axially reaches radial electric field, improves electrical property; The metal ring grading body is coated with insulating barrier, make the use of middle grading ring of the present invention can not reduce the original insulation distance of equipment, from another angle, grading ring provides a kind of new method in the middle of also giving manufacturing, promptly can be in the ring-type insulating barrier of making good hollow plating layer of metal film form the ring-type grading body of metal, can significantly reduce the weight that has the ring-type grading body made from metal now, there is multiple material can be used to make this insulating barrier at present, epoxy resin as the glass fibre enhancing, engineering plastics such as ABS, and this insulating barrier can be formed by the compound coating of two or more different materials layering, for example inner insulation layer adopts ABS and is convenient to moulding manufacturing and metal lining film, skin adopts silicon rubber and improves its weatherability, thereby bring into play the premium properties of different materials, improve the electrical property and the reliability of middle grading ring of the present invention; Insulated connecting piece constitutes by two sections, one section is connected with the insulating mounting part, one section is connected with the metal ring grading body, two sections insulated connecting piece are connected with bonding or bolt, rivet class mechanical connection manner and middle grading ring that the middle grading ring that constitutes and metal ring grading body are put together by two semicircular grading bodies, make middle grading ring of the present invention and existing equipment have more compatibility, be convenient to install and use and change;
A kind of composite insulator that middle grading ring is arranged of the present invention, use the high pressure grading ring at existing composite insulator, on the basis of ground connection grading ring, increased above-mentioned middle grading ring, difference according to electric pressure and territory of use, the diameter of middle grading ring, cross sectional shape and size, quantity and to be in the concrete parameter such as position at composite insulator umbrella sheath place also inequality, the formation of middle grading ring is to be connected by the insulating mounting member that metal ring grading body and insulating material are made, by reaching tight the connection with it with the suitable insulating mounting part of core body and umbrella sheath.The use of the middle grading ring among the present invention can realize following purpose: the 1) axial electric field of abundant uniform composite insulator, parameters such as diameter, cross sectional shape and the size of the metal ring grading body by grading ring in the middle of the appropriate design, the quantity of middle grading ring and position, can make of the present inventionly has the composite insulator of middle grading ring to have more rational selfcapacity and reach it along face Electric Field Distribution homogenizing; 2) because the existence of ring-type grading body has formed equipotential surface on composite insulator, make because of the uneven composite insulator radial surface of contamination electric field even, reach improve the composite insulator pollution flashover, wet lightning is pressed, and improves the purpose of its electric property and ageing properties; 3) insulated connecting piece of grading ring can be designed as discoidly in the middle of, and its effect is equivalent to a larger-size full skirt, can improve the electric property of composite insulator in freezing environment.The metal surface coated insulation layer that composite insulator is connected the ring-type grading body of the grading ring of installing on the gold utensil, the part or all of metal surface coated insulation layer of the connector that is connected with the ring-type grading body, its insulating barrier begins to coat to connector extension the metal surface of connector from the surface coated insulating barrier of ring-type grading body, and the striking gold utensil is installed, and making of the present inventionly has the composite insulator of middle grading ring to have better electric property.
In sum, of the present invention have the composite insulator of middle grading ring to have the axial comparatively uniformly and radial electric field of distribution, can improve the Performance And Reliability of system, grading ring is convenient to processing and manufacturing and use in the middle of of the present invention, has better economic, so grading ring and have the composite insulator of middle grading ring to realize its intended purposes in the middle of of the present invention.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the structural representation of grading ring in the middle of first kind of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the structural representation of grading ring in the middle of second kind of the present invention.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the composite insulator structural representation that middle grading ring is arranged of the present invention.
Fig. 6 is that the third middle grading ring of the present invention is installed on the partial structurtes schematic diagram in the composite insulator.
Fig. 7 is that second kind of middle grading ring of the present invention is installed on the partial structurtes schematic diagram in the composite insulator.
Fig. 8 is second kind of structural representation that the composite insulator of middle grading ring is arranged of the present invention.
Among the figure: the 1-core body; The 2-full skirt; The 3-sheath; 4-connects gold utensil; The existing grading ring of 5-; The 6-arcing horn; The 7-insulating barrier; 7.1-inner insulating layer; 7.2-external insulation layer; 8-ring-type grading body; The 9-insulated connecting piece; 9.1-external insulation connector; 9.2-interior insulated connecting piece; 10-insulating mounting part; The 11-composite insulator; Grading ring in the middle of 12-is of the present invention; The grading ring of 13-band external insulation; The 14-bolt; The 15-rivet.
Embodiment
Accompanying drawing 1, Fig. 2 are the structural representations of grading ring in the middle of first kind of the present invention, this centre grading ring is put together by two semicircular grading bodies, insulated connecting piece 9 and the insulating mounting part 10 of symmetry, wherein ring-type grading body 8 is made of the metal level of plating on Semicircular insulating barrier 7 inwalls equably, insulating barrier 7, insulated connecting piece 9, insulating mounting part 10 integrally manufactured forming, by bolt 14 (insulated bolt or anti-corona metal bolts) with the two amalgamation integrant in the middle of grading ring.
Accompanying drawing 3, Fig. 4 are the structural representations of grading ring in the middle of second kind of the present invention, the insulated connecting piece of this centre grading ring is formed by two sections, wherein external insulation connector 9.1 is connected with metal ring grading body 8, interior insulated connecting piece 9.2 is connected with insulating mounting part 10, and the inner surface of insulating mounting part 10 has four conical surface grooves, external insulation connector 9.1 is connected with bonding agent with 9.2 of interior insulated connecting piece.
Shown in the accompanying drawing 5, be at existing composite rod insulator 11 and be equipped with on the basis of existing grading ring 5, two middle grading rings 12 of the present invention are installed and first kind of composite insulator that middle grading ring is arranged of the present invention of formation at full skirt 2 sheaths 3 positions of centre, middle grading ring can adopt as Fig. 1, concrete structure illustrated in Figure 2 is realized with the connected mode of Fig. 7 and composite insulator: the insulating mounting part 10 of middle grading ring and sheath 3 shapes of composite insulator, size is suitable, this centre grading ring that separates two halves is involutory, be fixed in bolt 14 on the sheath 3 of composite insulator, the effect of the middle grading ring of final molding is equivalent to be provided with a full skirt that diameter is very big on composite insulator, help improving the electric property of composite insulator in cold environment; Middle grading ring also can adopt as Fig. 3, the connected mode of concrete structure illustrated in Figure 4 and Fig. 6 and composite insulator realizes: the shape of insulating mounting part 10 inner surfaces, core body 1 external diameter of size and composite insulator is suitable, the major part of insulating mounting part 10 and interior insulated connecting piece 9.2 is the sheath 3 of composite insulator, full skirt 2 coats, constitute the conical surface groove of full insulating mounting part 10 inner surfaces of silicon rubber complete filling of sheath 3, itself and composite insulator are connected as one securely, 9.1 of the interior insulated connecting piece 9.2 of the middle grading ring among Fig. 6 and external insulation connectors are connected with rivet 15, its ring-type grading body 8 is made of the metal level of plating on ring-type inner insulating layer 7.1 inwalls equably, the inner insulating layer 7.1 outer external insulation layers 7.2 that also are coated with the formation of different insulative material, as shown in Figure 4, the outer ring of interior insulated connecting piece 9.2 has and external insulation connector 9.1 corresponding breach, be when a composite insulator is provided with a plurality of centres grading ring, be convenient to the external insulation connector one by one by with installation, the structure of this radial, the draining of grading ring in the middle of being convenient to.Can use the middle grading ring of above-mentioned different structure and connected mode on same composite insulator single or in combination.
Shown in the accompanying drawing 8, be on the basis of existing composite rod insulator 11, two middle grading rings 12 of the present invention are installed at the umbrella sheath position of centre, and second kind of composite insulator that middle grading ring is arranged of the present invention that the grading ring 13 of mounting strap external insulation on the connection gold utensil at composite insulator two ends and arcing horn 6 are constituted, the grading ring of this band external insulation, in my another patent " a kind of grading ring ", elaborate, be on the basis of existing grading ring, ring-type grading body and part metals connector coated insulation layer with grading ring, and bring into play the arc effect that connects of original grading ring with the arcing horn of special use, the grading ring of band external insulation and the use of arcing horn can make of the present inventionly has the composite insulator of middle grading ring to have better electric property.
Designing as electric transmission line isolator, the insulator arrangement of power station post insulator one class, mentality of designing all the time is the overall dimension that the insulator arrangement of insulating requirements is satisfied in design earlier, all press the design of annex according to the Electric Field Distribution situation of this insulator arrangement again and to the adjustment of the overall dimension of insulator arrangement, grading ring and have the most important meaning of the composite insulator of middle grading ring to be to have changed fully the mentality of designing of existing insulator arrangement in the middle of the present invention, environmental condition according to the insulator arrangement use, analyze the Electric Field Distribution situation of insulator arrangement earlier, using middle grading ring of the present invention to adjust makes the residing Electric Field Distribution situation of this insulator arrangement reach the most uniform situation, the last overall dimension of determining insulator arrangement again, so mentality of designing helps shortening the composite insulator that has the above electric pressure of 500KV now and (comprises column support type, suspension type etc.) insulation distance, thereby reduce the height of present shaft tower, reduce the construction cost of transmission line, improve the reliability of system.
Though specification of the present invention illustrates around the clavate composite insulator always, but can extend consideration, on power equipments such as column support type composite insulator, strain insulator formula composite insulator, polymeric housed metal oxide arrester, install and use middle grading ring of the present invention and can reach the effect that improves its electric property and reliability equally, even can install and use middle grading ring of the present invention at the insulated part of porcelain and glass insulator, should be all within claim scope of the present invention.In addition, the profile of the ring-type grading body of middle grading ring of the present invention is not limited to the concrete form that this specification provides, and all can use as proper form such as C type open type ring-type grading body, racetrack ring-type grading bodies; The cross sectional shape of ring-type grading body also is not limited to the concrete shape that this specification provides, as long as can satisfy the requirement of its electric property, also can be diversified.
Claims (7)
1. grading ring in the middle of a kind, it is characterized in that: connect and compose by metal ring grading body, insulating mounting part and insulated connecting piece, have with the suitable insulating mounting part in relevant device installation position on outward extending insulated connecting piece be connected with the metal ring grading body and constitute in the middle of grading ring.
2. grading ring in the middle of according to claim 1, it is characterized in that: the metal ring grading body is coated with insulating barrier.
3. grading ring in the middle of according to claim 2 is characterized in that: the outer insulating barrier that coats of metal ring grading body is formed by the compound coating of two or more different materials layering.
4. grading ring in the middle of according to claim 1, it is characterized in that: the insulated connecting piece of middle grading ring constitutes by two sections, one section is connected with the insulating mounting part, and one section is connected with the metal ring grading body, and two sections insulated connecting piece are connected with bonding or bolt, rivet class mechanical connection manner.
5. grading ring in the middle of according to claim 1, it is characterized in that: the metal ring grading body is put together by two semicircular grading bodies.
6. one kind has aforesaid right requirement 1---the composite insulator of 5 described middle grading rings, by the connection gold utensil at the outer umbrella sheath that coats of core body, core body, core body two ends be installed on the metal grading ring that is connected on the gold utensil and constitute, it is characterized in that: core body external shed sheath position is equipped with an above-mentioned centre grading ring at least; The insulating mounting part of middle grading ring is connected with the geomery of core body or sheath is suitable and tight.
7. the composite insulator that middle grading ring is arranged according to claim 6, it is characterized in that: the metal surface that composite insulator connects the ring-type grading body of the grading ring of installing on the gold utensil is coated with insulating barrier, the part or all of metal surface of the connector that is connected with the ring-type grading body is coated with insulating barrier, its insulating barrier begins to coat to connector extension the metal surface of connector from the surface coated insulating barrier of ring-type grading body, and the striking gold utensil is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195406A CN101866729A (en) | 2010-06-09 | 2010-06-09 | Intermediate grading ring and composite insulator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195406A CN101866729A (en) | 2010-06-09 | 2010-06-09 | Intermediate grading ring and composite insulator with same |
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| CN101866729A true CN101866729A (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010195406A Pending CN101866729A (en) | 2010-06-09 | 2010-06-09 | Intermediate grading ring and composite insulator with same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005272A (en) * | 2010-12-01 | 2011-04-06 | 湖北鑫德赛绝缘技术有限公司 | Equalizing ring provided with internal insulation structure |
| CN103177824A (en) * | 2013-03-19 | 2013-06-26 | 国家电网公司 | Lightning protection insulator for 10KV tension rods |
| CN104600570A (en) * | 2015-02-05 | 2015-05-06 | 张立 | Lightning arrester terminal |
| CN106019011A (en) * | 2016-05-24 | 2016-10-12 | 中国南方电网有限责任公司电网技术研究中心 | Direct-current cable test terminal device |
| CN108875225A (en) * | 2018-06-25 | 2018-11-23 | 西安交通大学 | Regulation method for insulator and its surface field in GIS/GIL |
-
2010
- 2010-06-09 CN CN201010195406A patent/CN101866729A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005272A (en) * | 2010-12-01 | 2011-04-06 | 湖北鑫德赛绝缘技术有限公司 | Equalizing ring provided with internal insulation structure |
| CN103177824A (en) * | 2013-03-19 | 2013-06-26 | 国家电网公司 | Lightning protection insulator for 10KV tension rods |
| CN103177824B (en) * | 2013-03-19 | 2016-08-03 | 国家电网公司 | 10KV tension-resistant rod anti-thunder insulator |
| CN104600570A (en) * | 2015-02-05 | 2015-05-06 | 张立 | Lightning arrester terminal |
| CN106019011A (en) * | 2016-05-24 | 2016-10-12 | 中国南方电网有限责任公司电网技术研究中心 | Direct-current cable test terminal device |
| CN108875225A (en) * | 2018-06-25 | 2018-11-23 | 西安交通大学 | Regulation method for insulator and its surface field in GIS/GIL |
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Application publication date: 20101020 |