CN103035347A

CN103035347A - Ceramic composite insulator, mould and manufacturing process

Info

Publication number: CN103035347A
Application number: CN2012105730641A
Authority: CN
Inventors: 宋利强; 游传榜
Original assignee: HEBEI SILICON VALLEY CHEMICAL CO Ltd
Current assignee: HEBEI SILICON VALLEY CHEMICAL CO Ltd
Priority date: 2012-12-25
Filing date: 2012-12-25
Publication date: 2013-04-10

Abstract

The invention relates to a ceramic composite insulator, a mould and a manufacturing process. The ceramic composite insulator comprises a ceramic insulator, a rubber protective sleeve and a rubber umbrella surface, the ceramic insulator comprises a steel cap, a ceramic piece and a steel foot, the steel cap, the ceramic piece and the steel foot are solidly fixed through adhesive cement, and the exposed outer surface of the ceramic piece of the ceramic insulator is provided with the rubber protective sleeve tightly combined with the ceramic piece. The mould producing the ceramic composite insulator comprises a left mould, a right mould and a lower mould. The process manufacturing the ceramic composite insulator comprises the following steps: placing the ceramic insulator in the mould, installing the mould on a rubber injection machine and carrying out heating to rise temperature; locking the mould tightly, and vacuumizing the mould; injecting rubber to a mould cavity formed by an outer protective sleeve clearance, an inner protective sleeve clearance and an umbrella surface clearance through pressure, and maintaining pressure to carry out vulcanization; releasing the pressure and demoulding. The ceramic composite insulator, the mould and the manufacturing process can meet the insulating needs of the heavy polluted environment of the overhead transmission line of an electrical power system.

Description

A kind of porcelain composite insulator, mould and manufacturing process

Technical field

The present invention relates to a kind of structural design and manufacturing process of composite insulator, be specifically related to factory's Composite of disk-shaped suspension porcelain or glass insulator, belong to the T ﹠ D Technology field.

Background technology

The insulation support of electric power system high pressure overhead power line wire is mainly taken on by suspension disc insulator or glass insulator (hereinafter to be referred as porcelain [or glass] insulator, also claiming insulator).Common cap and pin insulator comprises standard type and large distance type insulator, and these insulators mainly are applicable to clear area and light dirty district.For solving the needs that use in heavy dirty district, bell-shaped insulator creep distance is large, but self-cleaning ability is poor, is difficult to satisfy the demand.

For this reason, fiber reinforced plastics rod adds the birth of the bar-shaped composite insulator of rubber umbrella cover, has solved well the Insulation Problems that filthy regional circuit supports.Its external insulation umbrella cover is made by silicon rubber mostly, silicon rubber has good resistance to soiling and ageing-resistant performance, can improve the pollution flashover voltage of wire support insulation, but the easy brittle failure of glass-reinforced plastic material and and the end hardware between the creep of attachment section be a large mortal wound, this product can not be applied on the significant points of the strain insulator of transmission line and large pulling force so far.The significant points of strain insulator and large pulling force still can only be forced to adopt porcelain [or glass] insulator with insulator, this is a very painful thing in heavy dirty district, be difficult to guarantee the reliability of resistant, the operation maintenance personnel are in emergency rating for a long time, are significant threat to socio-economic development.

At present, the approach that addresses this problem has: after using porcelain [or glass] insulator, for promoting its anti-pollution characteristic, power department is arranged on porcelain [or glass] insulator at transformer station or transmission line scene and applies RTV or PRTV antifouling flush paint; Another kind method is exactly the full skirt of bonding increase creep distance on porcelain [or glass] insulator at power department equipment operation scene, promotes creepage distance.Adhesive rubber class elastomer full skirt on porcelain insulator is proposed in " composite insulator " patent document of ZL200710004155.2, that above-mentioned on-the-spot the installation increases the development of climbing full skirt, be installed to again on the transmission line after full skirt bonded to porcelain insulator, reduced labour intensity, also be convenient to check on the quality.There is the drawback of two aspects in " composite insulator " of this document: the one, and the full skirt that increases creep distance still adopts adhesive and porcelain insulator bonding, the durability of adhesive (life-span) is far below the high temperature vulcanizate of porcelain and full skirt, and complex-shaped faying face can't guarantee bonding rear without air gap channel, the hidden danger that has the electric insulation deficiency, this is avoiding greatly of high voltage industry; The 2nd, only increased full skirt at porcelain insulator, fail to make all Composites of porcelain surface, fail to promote to greatest extent its anti-pollution characteristic.

Summary of the invention:

In order to overcome the shortcoming of prior art, the invention provides a kind of porcelain composite insulator, mould and manufacturing process, its structure, technique are simple, and good insulation preformance can satisfy the insulation needs of the heavy pollution running environment of electric power system overhead transmission line.

The present invention solves the technical scheme that its technical problem takes: a kind of porcelain composite insulator comprises porcelain insulator and rubber sheath, and porcelain insulator comprises steel cap, porcelain piece and steel pin, fixedly secures by bonding cement between steel cap, porcelain piece and the steel pin; The outer surface that the porcelain piece of described porcelain insulator is exposed has and the compact rubber sheath of porcelain piece, and extends the rubber full skirt (rubber sheath and full skirt general designation umbrella cover) below the inner sheath of porcelain piece surface.

A kind of mould of producing the porcelain composite insulator comprises left module, right module and lower module, and close contact between the steel cap of left module and right module and porcelain insulator has the oversheath gap between left module and right module and the porcelain piece; The inner sheath of formation gap is arranged between lower module and the porcelain piece, and described oversheath gap and inner sheath gap form the injection gap of rubber sheath; The full skirt gap that forms the rubber umbrella skirt is arranged between lower module and left module and the right module, and the full skirt gap communicates with described oversheath gap and inner sheath gap.

A kind of technique of producing the porcelain composite insulator comprises the following steps: 1), porcelain insulator is inserted in the mould of producing the porcelain composite insulator, mould is installed on the rubber injection machine, be heated to 110 ~ 150 ℃; 2), locking die makes oversheath gap, inner sheath gap and full skirt gap airtight, and it is vacuumized, vacuum degree reaches-90 ~-98kPa; 3), pressure injection rubber is to the die cavity of oversheath gap, inner sheath gap and the formation of full skirt gap, at 130 ~ 170 ℃ of lower pressure 8 ~ 15MPa, vulcanization reaction 10 ~ 20min of keeping; 4), pressure relief, open left module and right module, goods are taken out in the demoulding from the lower module, namely obtain the porcelain composite insulator.

1), structure, technique be simple the present invention has following advantages:, good insulation preformance can satisfy the insulation needs of the heavy pollution running environment of electric power system overhead transmission line; 2), the porcelain composite insulator umbrella cover of integral injection molding technique manufacturing is unitary construction, coats completely with porcelain insulator, without air gap, in conjunction with firmly, electric property is reliable.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is prior art porcelain insulator cutaway view;

Fig. 2 is porcelain composite insulator the first embodiment cutaway view of the present invention;

Fig. 3 is porcelain composite insulator the second embodiment cutaway view of the present invention;

Fig. 4 is mould the first embodiment cutaway view of the present invention;

Fig. 5 is mould the second embodiment cutaway view of the present invention.

Embodiment:

Among Fig. 1-5: 1, steel cap, 2, bonding cement, 3, porcelain piece, 4, the steel pin, 5, rubber sheath, 6, the rubber full skirt, 7, the oversheath gap, 8, the full skirt gap, 9, left module, 10, right module, 11, lower module, 12, the inner sheath gap.

As Figure 1-3, a kind of porcelain composite insulator comprises porcelain insulator and rubber sheath 5 and the rubber full skirt 6 of standard type, and porcelain insulator comprises steel cap 1, porcelain piece 2 and steel pin 4, fixedly secures by bonding cement 3 between steel cap 1, porcelain piece 2 and the steel pin 4; The outer surface that the porcelain piece 2 of described porcelain insulator is exposed has and the compact rubber sheath 5 of porcelain piece.

Described rubber sheath 5 has the rubber full skirt 6 with rubber sheath 5 one in the lower end of porcelain piece 2.The quantity of described rubber full skirt 6 is 1 or 2.Shown in Fig. 2,3.

The material of described rubber sheath 5 and rubber full skirt 6 is silicon rubber, polyurethane rubber or ethylene-propylene rubber.

As shown in Figure 4, a kind of mould of producing the porcelain composite insulator comprises left module 9, right module 10 and lower module 11, and close contact between the steel cap 1 of left module 9 and right module 10 and porcelain insulator has oversheath gap 7 between left module 9 and right module 10 and the porcelain piece 2; The inner sheath of formation gap 12 is arranged between lower module 11 and the porcelain piece 2, and described oversheath gap 7 and inner sheath gap 12 form the injection gap of rubber sheath 5; The full skirt gap 8 that forms rubber umbrella skirt 6 is arranged between lower module 11 and left module 9 and the right module 10, and full skirt gap 8 communicates with described oversheath gap 7 and inner sheath gap 12.Said structure is the mould structure of horizontal die sinking.

Be illustrated in figure 5 as vertical die-sinking die structure.Vertical die-sinking die is identical with the structure of the mould of horizontal die sinking, and just the die sinking direction is different.

A kind of technique of producing the porcelain composite insulator comprises the following steps: 1), porcelain insulator is inserted in the mould of producing the porcelain composite insulator, mould is installed on the rubber injection machine, be heated to 110 ~ 150 ℃; 2), locking die makes oversheath gap 7, inner sheath gap 12 and full skirt gap 8 airtight, and it is vacuumized, vacuum degree reaches-90 ~-98kPa; 3), pressure injection rubber is to the die cavity of oversheath gap 7,

inner sheath gap

12 and 8 formation of full skirt gap, at 130 ~ 170 ℃ of lower pressure 8 ~ 15MPa, vulcanization reaction 10 ~ 20min of keeping; 4), pressure relief, open left module 9 and right module 10, goods are taken out in the demoulding from the lower module 11, namely obtain the porcelain composite insulator.

Claims

1. porcelain composite insulator, it is characterized in that: a kind of porcelain composite insulator comprises porcelain insulator and the rubber sheath (5) of standard type, porcelain insulator comprises steel cap (1), porcelain piece (2) and steel pin (4), fixedly secures by bonding cement (3) between steel cap (1), porcelain piece (2) and the steel pin (4); The outer surface that the porcelain piece of described porcelain insulator (2) is exposed has and the compact rubber sheath of porcelain piece (5).

2. porcelain composite insulator according to claim 1, it is characterized in that: described rubber sheath (5) has the rubber full skirt (6) with rubber sheath (5) one in the lower end of porcelain piece (2); The quantity of described rubber full skirt (6) is 1 or 2.

3. porcelain composite insulator according to claim 1, it is characterized in that: the material of described rubber sheath (5) and rubber full skirt (6) is silicon rubber, polyurethane rubber or ethylene-propylene rubber.

4. mould of producing the porcelain composite insulator, it is characterized in that: comprise left module (9), right module (10) and lower module (11), close contact between the steel cap (1) of left module (9) and right module (10) and porcelain insulator has oversheath gap (7) between left module (9) and right module (10) and the porcelain piece (2); The inner sheath gap (12) of formation is arranged between lower module (11) and the porcelain piece (2), and described oversheath gap (7) and inner sheath gap (12) form the injection gap of rubber sheath (5); The full skirt gap (8) that forms rubber umbrella skirt (6) is arranged between lower module (11) and left module (9) and the right module (10), and full skirt gap (8) communicate with described oversheath gap (7) and inner sheath gap (12).

5. a technique of producing the porcelain composite insulator comprises the following steps: 1), porcelain insulator is inserted in the mould of producing the porcelain composite insulator, mould is installed on the rubber injection machine, be heated to 110 ~ 150 ℃; 2), locking die makes oversheath gap (7), inner sheath gap (12) and full skirt gap (8) airtight, and it is vacuumized, vacuum degree reaches-90 ~-98kPa; 3), pressure injection rubber is to the die cavity of oversheath gap (7), inner sheath gap (12) and full skirt gap (8) formation, at 130 ~ 170 ℃ of lower pressure 8 ~ 15MPa, vulcanization reaction 10 ~ 20min of keeping; 4), pressure relief, open left module (9) and right module (10), take out goods from the upper demoulding of lower module (11), namely obtain the porcelain composite insulator.