CN207834027U - The reinforced lightning protection insulation column of annular valve structure - Google Patents

Abstract

The utility model is related to power system insulations and overvoltage protection technology and equipment manufacturing technology field, more particularly to a kind of reinforced lightning protection insulation column of annular valve structure, including epoxy resin plug and insulating cylinder, insulating cylinder is sleeved on the outside of epoxy resin plug, upper fixing flange is arranged in the upper end of insulating cylinder, lower part mounting flange is arranged in the lower end of insulating cylinder, endless metal oxide valve block group is set between epoxy resin plug and insulating cylinder, epoxy resin plug, endless metal oxide valve block group and insulating cylinder are set with successively, perfusion sealing, seamless setting；The present apparatus is more light-weight than porcelain high-voltage insulation strut, exclusive integral structure, keep the comprehensive cost of device installation and operation cheap, the metal oxide valve block group field strength distribution of ring-shaped cylinder structure is uniform, heat-sinking capability is good, keeps its robust to repeated Motor ability strong, through-current capability is strong, keep the residual voltage for the lightning surge that transformer equipment bears lower, security performance higher.

Description

The reinforced lightning protection insulation column of annular valve structure

Technical field

The utility model is related to power system insulations and overvoltage protection technology and equipment manufacturing technology field, and in particular to A kind of reinforced lightning protection insulation column of annular valve structure.

Background technology

A large amount of insulation columns have been used in power plant high voltage station and electricity grid substation in electric system, have been used to support electrification Conductor to make energized conductor is alternate with grounding body and energized conductor to keep enough electrical safety distance, it is currently used absolutely Edge pillar has porcelain insulator pillar and composite insulation pillar, and outdoor porcelain insulator pillar is to improve antifouling work level, usually exhausted The bright brushing anti-pollution flashover coating of edge sublist, and weight is big, porcelain patticoat easily collapses the work that porcelain, impact resistance are poor, and installation and operation is safeguarded Work amount is big；The latter is light-weight, has higher antifouling work ability, and installation O＆M is convenient, but does not have the ability for lightning current of releasing. In addition, to prevent lightning surge accident, it is also required to that a large amount of metal oxide is installed on the busbar and inlet-outlet line in substation Arrester, the composite insulation arrester of existing structure is because structural sealing problems there are poor sealing and valve block problem of aging, are led It causes arrester to damage in operation, or even insulation fault occurs.Insulation column and metal oxide arrester are as important power transformation Device influences greatly transformer equipment safe operation and power supply reliability, and the quality quality such as insulation performance and mechanical strength refers to Mark needs to be further improved.

Conventional high-pressure insulation column and metal oxide arrester can only take independent mounting means at present.Such as：Power transformation The insulation column used on busbar of standing is used to support tube type bus, realize with framework and alternate insulation, then by lead with Metal oxide arrester connects on ground architecture, is hit to protect busbar to be invaded from lightning surge；Overhead transmission line Inlet wire conductor must also give to support and fix by insulation column, with keep with the earth and alternate electrical safety distance, Electrical distance caused by preventing windage yaw, mechanical stress etc. is insufficient and the excessive damage miscellaneous equipment of mechanical stress.The gold of existing structure Belong to Oxide Arrester since fault of construction does not have load function, substation's interior insulation pillar and arrester must be distinguished simultaneously Installing, to play stress and lightning protection function respectively, this pattern certainly will increase corresponding corollary equipment and space floor space, electrically Distance increases the performance for being also unfavorable for arrester lightning protection function, needs to explore a kind of safe and reliable combination unit.

Utility model content

In order to solve the above-mentioned technical problem the deficiency in, the purpose of this utility model is that：A kind of annular valve block knot is provided The reinforced lightning protection insulation column of structure not only ensured that its electric insulation was horizontal, mechanical strength, but also had good lightning protection effect, can The reliability for improving device itself can avoid lightning surge when lightning stroke from invading substation along overhead transmission line and cause power transformation Equipment damage reduces a series of economic losses damaged equipment because of insulation breakdown and brought.

The utility model is that technical solution used by solving its technical problem is：

The reinforced lightning protection insulation column of the annular valve structure, including epoxy resin plug and insulating cylinder, insulating cylinder It is sleeved on the outside of epoxy resin plug, upper fixing flange is arranged in the upper end of insulating cylinder, and the lower end setting lower part of insulating cylinder is solid Determine flange, endless metal oxide valve block group, epoxy resin plug, endless metal are set between epoxy resin plug and insulating cylinder Oxide valve block group and insulating cylinder are set with successively, and perfusion sealing, the outside of seamless setting, insulating cylinder is arranged silicone rubber jacket, Full skirt is set on silicone rubber jacket.

Preferably, metal oxide valve block group is cylinder-like structure, is laminated by multi-disc metal oxide valve block suit, With excellent nonlinear resistance feature, i.e., it is an insulator under normal system working voltage, conducting electric current is microampere order, when Become conductor when being nanosecond under lightning surge, can be conducive to by the lightning current of tens of kilo-ampere amplitudes, circular cylindrical structure The heat-sinking capability under amplitude electric current is improved, the through-current capability of unit area valve block, the cylindrical metal oxidation of upper end are improved Object valve block is connected with upper fixing flange, and the cylindrical metal oxide valve block of lower end is connected with lower part mounting flange, tool The use sealing sleeve structure of body is closely coupled to be connect, and ensures that lightning current aerial drainage circuit is unimpeded, and is ensured using perfusion sealing technology The overall sealing performance and insulation performance of device prevent endless metal oxide valve block under working voltage the problem of aging, protect The reliability of card device self-operating.

Preferably, insulating cylinder is glass fibre reinforced plastic insulating cylinder or high-strength epoxy insulation resin cylinder, and insulating cylinder is hollow ring structure, Surfaces externally and internally is smooth, and tube wall thickness is uniform, has good mechanical performance and dielectric properties, barrel lenght and electric insulation horizontal It is adapted with epoxy resin plug, the normal operating voltage of corresponding voltage grade and various overvoltage, load ability can be born Meet the various stress demands in place to use with mechanical strength and epoxy resin plug bears corresponding mechanical force jointly.

Preferably, silicone rubber jacket and full skirt are sleeved on the outer surface of insulating cylinder, forming apparatus by adhesive bonding External insulation increase creepage distance for reinforcing exterior insulation, improve antifouling work ability, have in structure and reinforce sealing Function.

Preferably, screw hole being opened up on upper fixing flange and lower part mounting flange, main function is connection and fixes, Play the role of sealing, lower part mounting flange connect with Equipment Foundations, is bolted；Upper fixing flange carries fixing end Son constitutes lightning current leakage path, and keep charged metal conductor and connect for fixing and connecting the metallic conductor in substation Ground or the electrical distance between other electrical bodies.

Compared with prior art, the utility model has the advantages that：

The utility model realizes the lightning protection function one of the insulation of Conventional insulation pillar, support and metal oxide arrester Body structure, the mechanism design and perfusion sealing technology of dual load, improves the mechanical strength and leakproofness in device use Can, it can ensure dielectric level；Again because radiator structure improves, the through-current capability of endless metal oxide valve block is improved, is had Good lightning protection effect；It can use the positions such as substation bus bar or inlet wire outdoors, integral structure can either save place sky Between, convenient for the compact Layout between electrical equipment, and can save separately installed arrester or metal oxide arrester it is necessary Basis, shaft tower and guide wire and its connection gold utensil etc., reduce equipment installation and maintenance work amoun, effectively increase substation Lightning protection is horizontal, is conducive to the reliability for improving power supply, reduces a series of economic losses for damaging equipment belt because of insulation breakdown.

Endless metal oxide valve block is set with stepped construction using multicolumn, and sealing is in epoxy resin plug and glass fibre reinforced plastic insulating Between cylinder, there is the apparent structural advantage of seal aspect, moment heat-sinking capability improves, and homogenous quantities annular diameter is compared with body diameter Greatly, be conducive to the performance of the more uniform single endless metal oxide valve block performance of field distribution, absorb overvoltage and through-flow Ability is more superior, and upper and lower part mounting flange connects with metal oxide valve block group using sealing sleeve structure is closely coupled, ensures Lightning current aerial drainage circuit is unimpeded, and can improve the integral insulation performance of device, also can effectively solve metal oxide valve block operation Problem of aging under voltage.

The epoxy resin plug or glass fibre reinforced plastic insulating cylinder of use are easily fabricated, and molding assembly is good, epoxy resin or glass Steel insulation tube itself has high mechanical shock resistance, good toughness, high mechanical strength, electrocorrosion-resisting, ageing resistance, dielectric properties Good, good with the material compatibilities such as silicon rubber, the mounting flange metal of use, anti-electricity, heat, mechanical aging and service life are long, silicon Rubber sheath and its full skirt elasticity are good, convenient for manufacture and suit, have good hydrophobicity and migration of hydrophobicity, antifouling work, resistance to The features such as galvanic corrosion is strong.

The present apparatus is more light-weight than porcelain high-voltage insulation strut, and exclusive integral structure makes the synthesis of device installation and operation make Valence is cheap, and the metal oxide valve block group field strength distribution of ring-shaped cylinder structure is uniform, and heat-sinking capability is good, its robust to repeated is made to act energy Power is strong, and through-current capability is strong, keeps the residual voltage for the lightning surge that transformer equipment bears lower, security performance higher.

Description of the drawings

The structural schematic diagram of Fig. 1 the utility model.

In figure：1, screw hole；2, upper fixing flange；3, epoxy resin plug；4, endless metal oxide valve block group；5, ring Shape metal oxide valve block；6, insulating cylinder；7, silicone rubber jacket；8, full skirt；9, lower part mounting flange.

Specific implementation mode

The utility model embodiment is described further below in conjunction with the accompanying drawings：

Embodiment 1

As shown in Figure 1, the reinforced lightning protection insulation column of annular valve structure described in the utility model, including epoxy resin Plug 3 and insulating cylinder 6, epoxy resin plug 3 are constituted for high-strength epoxy glass fibre, have good mechanical performance and dielectricity Can, it is the important load component of insulation column, the normal operating voltage of corresponding voltage grade and various overvoltage can be born, absolutely Edge cylinder 6 is sleeved on the outside of epoxy resin plug 3, and upper fixing flange 2 is arranged in the upper end of insulating cylinder 6, and the lower end of insulating cylinder 6 is set Lower part mounting flange 9 is set, endless metal oxide valve block group 4, epoxy resin are set between epoxy resin plug 3 and insulating cylinder 6 Plug 3, endless metal oxide valve block group 4 and insulating cylinder 6 are set with successively, perfusion sealing, seamless setting, outside insulating cylinder 6 Portion is arranged silicone rubber jacket 7, and full skirt 8, silicone rubber jacket 7 and full skirt 8 is arranged on silicone rubber jacket 7 is bonded set by adhesive Mounted in the outer surface of insulating cylinder 6, the external insulation of forming apparatus increases creepage distance, improves antifouling work for reinforcing exterior insulation Ability has the function of reinforcing sealing in structure.

Wherein, metal oxide valve block group is cylinder-like structure, is laminated, is had by multi-disc metal oxide valve block suit There is excellent nonlinear resistance feature, i.e., is an insulator under normal system working voltage, conducting electric current is microampere order, works as thunder Become conductor when being nanosecond under electric overvoltage, can be conducive to carry by the lightning current of tens of kilo-ampere amplitudes, circular cylindrical structure Heat-sinking capability under high amplitude electric current improves the through-current capability of unit area valve block, the cylindrical metal oxide of upper end Valve block is connected with upper fixing flange 2, and the cylindrical metal oxide valve block of lower end is connected with lower part mounting flange 9, tool The use sealing sleeve structure of body is closely coupled to be connect, and ensures that lightning current aerial drainage circuit is unimpeded, and is ensured using perfusion sealing technology The overall sealing performance and insulation performance of device prevent endless metal oxide valve block 5 under working voltage the problem of aging, protect The reliability of card device self-operating.

Insulating cylinder 6 is glass fibre reinforced plastic insulating cylinder or high-strength epoxy insulation resin cylinder, and insulating cylinder 6 is hollow ring structure, inside and outside Surface is smooth, and tube wall thickness is uniform, has good mechanical performance and a dielectric properties, and barrel lenght and electric insulation be horizontal and ring Oxygen resin plug 3 is adapted, and can bear the normal operating voltage of corresponding voltage grade and various overvoltage, load ability and machine Tool intensity meets the various stress demands in place to use and epoxy resin plug 3 bears corresponding mechanical force jointly.

In addition, opening up screw hole 1 on upper fixing flange 2 and lower part mounting flange 9, main function is connection and fixes, The effect of sealing is also functioned to, lower part mounting flange 9 connect with Equipment Foundations, is bolted；Upper fixing flange 2 is with solid Fixed end constitutes lightning current leakage path, and keep charged metal conductor for fixing and connecting the metallic conductor in substation With ground connection or the electrical distance between other electrical bodies.

The operation principle and specific work process of the utility model：

Using the glass fibre reinforced plastic insulating of epoxy resin plug 3 and outer circle position by central part in the utility model structure The structure design of 6 dual loads of cylinder, to improve the mechanical performance of device；The metal oxide valve block group outer circle of circular cylindrical structure Increase with the heat dissipation area of the more conventional column structure of lateral heat dissipation area of inner circle, axial field strength is evenly distributed, is conducive to improve The discharge capacity of metal oxide valve block；Again since metal oxide valve block itself has good nonlinear characteristic, in system Under normal operating voltage, metal oxide valve block group leakage current is only microampere order, and good state of insulation is presented, once thunder and lightning Overvoltage wave is invaded along overhead transmission line, and conducting state is presented at the nanosecond moment in metal oxide valve block group, and lightning current passes through The grounded net of lightning current is leaked into the earth by lower part mounting flange 9 and its earthing or grounding means, and lightning wave terminates to recover immediately to insulation shape State plays the dual function of common insulation column and arrester.Since integral structure makes metal oxide arrester and quilt It protects the electrical distance of equipment to shorten, is more conducive to reduction and is applied to by the lightning surge amplitude in protection equipment, improve Lightning protection efficiency.

The above is only the preferable case study on implementation of the utility model, is not to make other shapes to the utility model The limitation of formula, any person skilled in the art are changed or are modified as possibly also with the technology contents of the disclosure above With the equivalent embodiment of variation.But every without departing from the content of the technical scheme of the utility model, the technology according to the utility model Essence still falls within technical solutions of the utility model to any simple modification, equivalent variations and remodeling made by above example Protection domain.

Claims (5)

1. a kind of reinforced lightning protection insulation column of annular valve structure, including epoxy resin plug (3) and insulating cylinder (6), absolutely Edge cylinder (6) is sleeved on the outside of epoxy resin plug (3), the upper end setting upper fixing flange (2) of insulating cylinder (6), insulating cylinder (6) lower end setting lower part mounting flange (9), which is characterized in that ring is set between epoxy resin plug (3) and insulating cylinder (6) Shape metal oxide valve block group (4), epoxy resin plug (3), endless metal oxide valve block group (4) and insulating cylinder (6) according to Secondary suit, perfusion sealing, the outside of seamless setting, insulating cylinder (6) are arranged silicone rubber jacket (7), and silicone rubber jacket is arranged on (7) Full skirt (8).

2. the reinforced lightning protection insulation column of annular valve structure according to claim 1, which is characterized in that metal aoxidizes Object valve block group is cylinder-like structure, is laminated by multi-disc endless metal oxide valve block (5) suit.

3. the reinforced lightning protection insulation column of annular valve structure according to claim 1, which is characterized in that insulating cylinder (6) it is glass fibre reinforced plastic insulating cylinder or high-strength epoxy insulation resin cylinder, insulating cylinder (6) is hollow ring structure, and surfaces externally and internally is smooth.

4. the reinforced lightning protection insulation column of annular valve structure according to claim 1 or 3, which is characterized in that silicon rubber Plastic boot (7) and full skirt (8) are sleeved on the outer surface of insulating cylinder (6) by adhesive bonding.

5. the reinforced lightning protection insulation column of annular valve structure according to claim 1, which is characterized in that top is fixed Screw hole (1) is opened up on flange (2) and lower part mounting flange (9).