CN102522162A - Disk-shaped suspension porcelain or glass composite insulator - Google Patents

Abstract

The invention relates to a disk-shaped suspension porcelain or glass composite insulator, wherein an iron cap is arranged on the upper part of a porcelain element or a glass element, and steel pins are arranged on the lower part thereof, an integral combined shelter is mould pressing formed or injection molded on the middle lower parts of the steel pins, and at least two radial recesses are arranged on the upper surface of the porcelain element or glass element. According to the invention, integral shelters made of organic materials are respectively arranged on the iron cap and steel pins to greatly improve the creepage distance and to reinforce the pollution flashover prevention capability, and the integral shelters can be produced in an industrial large scale manner. The products are manufactured in factories to guarantee the quality of the product interfaces, so the aging speed is slow; the non-ridge structure guarantees a simple production technique; the small dimension greatly reduces the weight of the insulator; the recesses arranged on the upper surface of the porcelain element or glass element to facilitate the rain on the upper surface to flow away; the integral combined shelter arranged on the steel pins can shield the rain to keep the dryness of the upper surface of the next adjacent insulator to improve the wet flashover voltage and to block the electrons emitted by the steel pins so as to improve the dry flashover voltage.

Description

A kind of disc suspension porcelain or glass composite insulator

Technical field

The present invention relates to the cap and pin insulator that the high voltage ac/dc circuit is used, be specially a kind of disc suspension porcelain or glass composite insulator.

Background technology

Mainly through overhead transmission line, insulator is a most important component in the overhead transmission line in the conveying of electric energy.The above high-tension line of 35kV all uses suspension insulator or by its suspension insulator string of forming.By structure and shape, suspension insulator is divided into two kinds of dish type and clavates.

Make the medium that suspension insulator is used, must possess overhead transmission line and move needed electric and mechanical property, and enough stability is arranged when changes in atmospheric.Electroceramics is the medium of bringing into use most; But following shortcoming is arranged: owing to be difficult to obtain the standard raw materials of ingredient stability; Because the process for making of porcelain is complicated; Have no idea to solve the mechanization and the automation issues of master operation, therefore be difficult to obtain stable electromechanical properties, particularly more outstanding when the insulator of making 16～30 tonnes.

At 20th century middle nineteen thirties, bring into use glass insulator, in the practice of producing and moving, though find that glass insulator has following advantage:

1, be stable than the raw material of making the electroceramics use, for the electrical characteristic and the mechanical property of stabilized glass have been created good condition;

2, technological process can realize automation completely and mechanization, has eliminated the man's activity of producers to the insulator performance, and investment will be lacked;

3, the electromechanical properties of toughened glass are more much higher than electroceramics, make the insulator of equal type, and its size and weight ratio porcelain insulator are much little;

4, because the transparency of glass is found fine cracks and various internal flaw and damage easily when outline inspection;

5, can cancel the regular preventive trial that in running, insulator is carried out.This is because the destruction that every kind of damage of toughened glass all can cause insulator, and the operations staff is very easy to find it when line walking.When insulator damaged, the glass fragment between chapeau de fer and the steel pin was stuck, and the mechanical strength of insulator remainder is enough to prevent that insulator string is disconnected takes off;

6, mechanical strength is high, makes the surface be difficult for the crack takes place, and ageing process is much slow.

But it and porcelain insulator all have following common problem:

1, belong to inorganic material, face reveals hydrophily, makes the pollution layer of insulator surface make moist, and this moment, insulator under operating voltage flashover possibly take place;

2,3 to 4 darker ribs are arranged under the full skirt, this is in order to increase creepage distance, but has reduced effective creepage distance in fact, has increased the possibility of pollution flashover.

Two electrodes of cap and pin insulator are made up of chapeau de fer and steel pin respectively, and the former generally processes with malleable cast iron, and the latter generally processes with mild steel.The steel pin is contained in the inside of porcelain spare or toughened glass, with the cement gel dress, also adorns with cement gel between chapeau de fer and porcelain spare or the toughened glass then.When forming insulator string, the spherojoint of steel pin inserts in the ball-and-socket of adjacent elements chapeau de fer, and fixes with pin, becomes the ball strand and is flexible coupling.

Along with expanding economy, filthy problem has become the serious problems of following economic the growth fast and producing.Operating experience proves that the pollution flashover of insulator string is the one of the main reasons of normal running (operation) conditions line outage.How to improve the anti-pollution flashover ability of transmission line, become the big problem that domestic and international Utilities Electric Co. faces.

Insulator surface receives the pollutant of pollution and insulator surface by moistening, is two essential conditions of insulator generation pollution flashover, and darker rib is arranged under the cap and pin insulator full skirt; This looks it is to have increased leakage distance, but actual under wind action, the recess between rib is easy to generate vortex; Groove becomes the filthy long-pending part that is prone to, and this position also is difficult for being run into the greasy weather by rain-out; These filths are made moist and are conducted electricity; Because porcelain or toughened glass are hydrophilic materials, the easy moisture absorption is so their anti-soil dodges the non-constant of ability again.Traditional disc suspension porcelain or glass insulator, its structure is seen Fig. 5, and chapeau de fer 4 is arranged at disc suspension porcelain or glass insulator 9 tops, and porcelain spare or glass workpiece 7 are arranged at the bottom, and steel pin 5 is arranged at the bottom of porcelain spare or glass workpiece 7, and porcelain spare or glass workpiece 7 have 3 to 4 darker ribs 8.

In decades recently, electric power system extensive use composite material both domestic and external replaces porcelain or glass to make insulator, and composite material is a kind of organic material, demonstrates very strong hydrophobicity, therefore can improve the pollution flashover voltage of insulator.

But composite insulator also has, and full skirt is aging, core brittle fracture, dare not uses, lightning protection poor electrical performance on the strain tower, under high wind, rock serious, be prone to by the unfirmly closing and the problems such as monitoring difficulty that is in operation.

Because pollution flashover accident is threatening the safe and stable operation of electric power system always; And above-mentioned three kinds of insulators all respectively have pluses and minuses; So the silicon rubber antifouling flush paint becomes a welcome solution, the purpose of this coating is that the hydrophily of porcelain (glass) insulator surface is changed into hydrophobicity.But because antifouling flush paint is the product of site operation, exist be difficult for ensuring the quality of products, material and problems such as manpower consumption is big, price height, therefore can only be as a kind of provisional, remedial measure.

The applicant has applied for " a kind of insulator with the composite type barrier " (one Chinese patent application 201110393094X and 201120492761.5), can solve the pollution flashover problem effectively, and it is also very flexible to construct; Versatility is also fine; But the insulator of the main application of this patent for having moved considers that from the angle that barrier is installed barrier must be divided into two parts; Use bonding agent that they are combined into a complete barrier at the construction field (site); Since be on-the-spot bonding, thus room temperature-vulcanized bonding agent can only be used, and this bonding agent is easy to wear out; And site operation is difficult for ensuring the quality of products, and also must under situation about having a power failure, just can carry out.Therefore they are the same with antifouling flush paint, also are the products that belongs to site operation, therefore also can only be as a kind of provisional, remedial measure.

In sum, the pollution flashover problem that how to solve the pollution flashover problem of electric power system, particularly disc suspension porcelain or glass insulator better is extremely urgent, a far reaching problem.

Summary of the invention

The objective of the invention is to above-mentioned present situation; Aim to provide a kind of insulator with the composite type barrier structure, the Mold Making of composite type barrier installation simple and easy, barrier is simple and easy and can adapt to a kind of disc suspension porcelain or the glass composite insulator of various variety classeses, different insulative material and different electric pressures.

The implementation of the object of the invention does; A kind of disc suspension porcelain or glass composite insulator; Chapeau de fer is arranged at porcelain spare or glass workpiece top, and the steel pin is arranged at the bottom, the molded or integral combined barrier of injection moulding of chapeau de fer lower die; Middle and lower part compression molding of steel pin or the integral combined barrier of injection moulding are provided with twice groove radially at least at the upper surface of porcelain or glass workpiece.

The composite type barrier is made up of universal barrier and several auxiliary barrier, has at least an annular auxiliary barrier and/or side that auxiliary barrier is arranged at the upper and lower surfaces of universal barrier.

The present invention has kept all advantages of " a kind of insulator with the composite type barrier " patent, changes the composite type barrier into integral type by two parts, has removed the darker rib in porcelain (glass) full skirt bottom, has the following advantages:

1, on chapeau de fer and steel pin, all is provided with the whole barrier of organic material respectively, significantly increased creepage distance,, strengthen so anti-pollution flashover ability is compared with disc suspension porcelain or glass insulator greatly again because this barrier is a hydrophobic material;

2, expand to industrialized large-scale production by site operation; At produce in factory; Compression molding or injection moulding all are under high pressure to accomplish with high temperature vulcanized material; So barrier and chapeau de fer, steel pin are integrally formed, have guaranteed the quality of Product Interface, high temperature vulcanized material aging speed is well below room temperature-vulcanized material;

3, remove the rib structure of porcelain or glass workpiece lower surface, simplified the production technology of insulator greatly;

4, integral combined barrier can be deep into inboard, chapeau de fer lower end, has further improved the dielectric strength of insulator, and increases one deck resilient coating in the contact portion of chapeau de fer and porcelain or glass workpiece, has reduced the failure rate of insulator;

5, the upper surface at porcelain or glass workpiece is provided with twice groove radially at least, the loss of the upper surface rainwater of being more convenient for;

6, integral combined barrier 3 is set on the steel pin, except that increasing creepage distance, the hydrophobic ability of reinforced insulation improves outside the pollution flashover voltage, when drenching with rain, can block rainwater, makes the upper surface retaining part of next adjacent insulator dry, improves the lightning that wets and presses; Also can stop the electronics that the steel human hair combing waste goes out, improve dried lightning and pressed.

Description of drawings

Fig. 1 is the structural representation of disc suspension porcelain or glass composite insulator,

Fig. 2 a, b be for to be provided with four roads the porcelain spare of the present invention or the glass workpiece structural representation of groove radially at upper surface,

Fig. 3 is the structural representation of the present invention that the integral combined barrier of chapeau de fer is set in the chapeau de fer bottom,

Fig. 4 is the structural representation of the present invention that the integral combined barrier of steel pin is set in steel pin middle and lower part,

Fig. 5 is traditional disc suspension porcelain or glass insulator structural representation.

Embodiment

The present invention is detailed with reference to the accompanying drawings.

With reference to Fig. 1, chapeau de fer 4 is arranged at porcelain spare of the present invention or glass workpiece 1 top, and steel pin 5 is arranged at the bottom, and the molded or injection moulding of chapeau de fer 4 lower die has integral combined barrier 2,5 middle and lower part compression moldings of steel pin or the integral combined barrier 3 of injection moulding.At first; The whole barrier of difference compression molding or injection moulding on chapeau de fer and steel pin; And then according to the traditional disc suspension porcelain or the linkage editor of glass insulator; Porcelain spare or glass workpiece are connected with the chapeau de fer that has whole barrier, steel pin, accomplish the overall process that disc suspension porcelain or glass composite insulator are produced in batch production.At produce in factory; Compression molding or injection moulding all are under high pressure to accomplish with high temperature vulcanized material; So integral combined barrier and chapeau de fer, steel pin are integrally formed, have guaranteed the quality of Product Interface, high temperature vulcanized material aging speed is well below room temperature-vulcanized material.

With reference to Fig. 2, at the upper surface of porcelain or glass workpiece 1 twice groove 6 radially is set at least, be convenient to the loss of upper surface rainwater.

With reference to Fig. 3, the molded or injection moulding of chapeau de fer 4 lower die has integral combined barrier 2, can increase the insulation distance of insulator, has improved dried lightning and has pressed; Can increase creepage distance, the hydrophobic ability of reinforced insulation has improved pollution flashover voltage.

Because integral combined barrier 2 is before the insulator assembling, to carry out in compression molding on the chapeau de fer or injection moulding; So it is inboard that integral combined barrier 3 can be deep into the chapeau de fer lower end; Further improved the dielectric strength of insulator; And increase one deck resilient coating in the contact portion of chapeau de fer and porcelain or glass workpiece, reduced the failure rate of insulator.

With reference to Fig. 4, at 5 middle and lower part compression moldings of steel pin or the integral combined barrier 3 of injection moulding.Can increase creepage distance, the hydrophobic ability of reinforced insulation has improved pollution flashover voltage; When drenching with rain, can block rainwater, make the upper surface retaining part of next adjacent insulator dry, improve wet lightning and pressed; Can stop the electronics that the steel human hair combing waste goes out, improve dried lightning and pressed.

Claims (1)

1. disc suspension porcelain or glass composite insulator; Chapeau de fer is arranged at porcelain spare or glass workpiece top; The steel pin is arranged at the bottom; Molded or the integral combined barrier of injection moulding of chapeau de fer lower die, middle and lower part compression molding of steel pin or the integral combined barrier of injection moulding are provided with twice groove radially at least at the upper surface of porcelain or glass workpiece;

The composite type barrier is made up of universal barrier and several auxiliary barrier, has at least an annular auxiliary barrier and/or side that auxiliary barrier is arranged at the upper and lower surfaces of universal barrier.

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