A kind of polymer matrix composites and preparation technology thereof who is applicable to capacity expansion conducting wire of power transmission line
Technical field
The invention belongs to capacity expansion conducting wire of power transmission line and use polymer matrix composites field, be specifically related to a kind of thermosetting resin and a kind of preparation technology who is applicable to high strength that steady and continuous produces, the composite (claiming again composite core) that high temperature resistant, surface is regular, highly polished.
Background technology
Modern industry improves constantly the requirement of electric load demand and power supply reliability, to power industry, has higher requirement.Resources for construction economizing type, environmentally friendly electrical network, become the pressing problem that power industry faces.For the challenge that saluting future power system faces, when being badly in need of solving the raising of power circuit transmission capacity, can make full use of existing steel tower again, avoid circuit corridor land used to increase this technical barrier as far as possible.
Compare with traditional steel-cored aluminium strand have lightweight, intensity is high, Heat stability is good, sag is low, current-carrying capacity is large and the successful development of the compound core conducting wire of the advantage such as corrosion-resistant, is expected to realize applying of low-loss, environment-friendly type, economizing type and large capacity advanced composite material (ACM) technology of transmission of electricity.This rebuilds significant to reducing the circuit in the consumption of non-ferrous metal scarce resource, the increase reliability of electric power netting safe running, the capacity-increasing transformation of old circuit and shortage of land resource area.
Existing composite core preparation technology have cure cycle long, easily occur that mould stops up, product surface fineness shortcoming, resin-coating fiber not thoroughly, degradation problem under the mechanical strength that causes of resin solidification technique, because the quality of composite core quality will directly affect the quality of compound core conducting wire, and then affect whole transmission line of electricity safe operation, therefore for improving transmission line of electricity property safe and reliable to operation, the combination property of composite core should further improve.
Summary of the invention
The object of the invention is to propose a kind of solve polymer matrix composites preparation technology cure cycle for existing capacity expansion conducting wire of power transmission line long, easily occur that mould stops up, the preparation technology of the problem such as product surface fineness shortcoming, resin-coating fiber are not thorough, obtain a kind of can continuous and stable production and the preparation technology of composite for the stable capacity expansion conducting wire of power transmission line of physical and chemical performance.
The preparation technology of polymer matrix composites for a kind of capacity expansion conducting wire of power transmission line that the present invention proposes, is characterized in that comprising the following steps:
(1) the uncoiling yarn bundle of the pretreated reinforcing material of drying is under the pulling force of hauling machine, after a series of guide rollers and boundling screen, yarn collecting wheel, enters dipping glue groove, and fully the glue of impregnated with resin material, makes the complete coating reinforced fiber of resin material;
(2) fiber infiltrating through resin, by having the preforming mould of certain interface shape, is discharged unnecessary resin and bubble, carries out preformed;
(3) carry out front curing schedule: by leading portion curing mold, the fiber infiltrating through resin is progressively heat absorption intensification in this mould, resin solidifies through viscous state, gel state, glassy state aftershaping, under the effect of inner pattern releasing agent applicable, by draw-gear, pulls out stripping forming;
(4) carry out rear curing schedule;
(5) by admission machine, carry out goods rolling, by cutter sweep, be cut into the goods of Len req;
Wherein, the formula of described resin material is: 100 parts of thermosetting resins, 50~150 parts, curing agent, 1~20 part of promoter, 1~20 part of releasing agent.
Preferably, the temperature constant of (1) described dipping glue groove is 50-70 ℃, and the temperature in (2) preforming mould is 80~110 ℃.
Preferably, the first heating interval temperature in leading portion curing mold is 120-150 ℃; The second heating interval temperature is 150~185 ℃; The 3rd heating interval temperature is 160~180 ℃.
Preferably, four sections of laser heating intervals of rear curing employing, the temperature of heating interval is 180~220 ℃.
Preferably, hauling speed is not less than 0.3m/min.
Preferably, curing agent is one or more that are selected from anhydrides, fat polyamine class, amide groups amine, organic acid, resinae.
Preferably, promoter being is selected from one or more in amine, phenol, imidazoles.
Preferably, releasing agent is to be selected from one or more of zinc stearate, stearic acid, silicone oil, silicone grease class, self-control inner pattern releasing agent applicable.
Preferably, described reinforcing material is one or more that are selected from carbon fiber, basalt fibre, glass fibre, boron fibre, aramid fiber, silicon carbide fibre, PBI fiber.
Of the present invention can continuous and stable production and stable relevant parameter corresponding to composite core preparation technology of physical and chemical performance on following basis, drawing: in mould corresponding to the related resin curing process of composite core preparation technology of take, temperature field and the dynamic change of resin solidification degree are reference, with hauling speed, solidification temperature, heating interval length is as three factors, and heat resistance, hot strength, surface quality are carried out orthogonalization design as three levels.
The preparation technology of polymer matrix composites for capacity expansion conducting wire of power transmission line of the present invention, the performance indications of end article should reach: composite core fiber content V
f=60~80%, composite core hot strength is not less than 2400MPa, and composite core glass transition temperature is not less than 180 ℃.
The preparation technology of polymer matrix composites for capacity expansion conducting wire of power transmission line of the present invention, the outward appearance of end article should meet: composite core any surface finish, roughness is relatively low, the complete coating reinforced fiber of resin.
Of the present invention can continuous and stable production and the stable capacity expansion conducting wire of power transmission line of physical and chemical performance by the preparation technology's of polymer matrix composites advantage, be, improved sample combination property and production efficiency, surface is regular, highly polished and can continuous and stable production.
The specific embodiment
By specific embodiment, the present invention is specifically described or is described further below, its object is better to understand content of the present invention, but protection scope of the present invention is not limited to these embodiment.
Embodiment 1
Of the present invention can continuous and stable production and the stable related resin formula of composite core preparation technology of physical and chemical performance, according to following proportioning: 100 parts of resins, 120 parts, curing agent, 5 parts of promoter, 3 parts of releasing agents.
Of the present invention can continuous and stable production and the stable composite core preparation technology of physical and chemical performance, by the temperature constant of glue groove, be 65 ℃, the temperature of the fiber infiltrating through resin in mould leading portion preheating zone is 105 ℃.
Of the present invention can continuous and stable production and stable leading portion curing mold corresponding to composite core preparation technology of physical and chemical performance, the first corresponding heating interval is 148 ℃; The second heating interval is 178 ℃; The 3rd heating interval is 170 ℃.Between rear curing area, adopt four sections of laser heating modes, the temperature of heating interval is 200 ℃.
Of the present invention can continuous and stable production and stable hauling speed corresponding to composite core preparation technology of physical and chemical performance be made as 0.3m/min.
According to above-mentioned can continuous and stable production and the sample for preparing of the stable composite core preparation technology of physical and chemical performance after testing, composite core glass transition temperature is 195 ℃, hot strength 2446MPa, composite core any surface finish, without roughness, the complete coating reinforced fiber of resin.
Embodiment 2
Of the present invention can continuous and stable production and the stable related resin formula of composite core preparation technology of physical and chemical performance, according to following proportioning: 100 parts of resins, 95 parts, curing agent, 12 parts of promoter, 5 parts of releasing agents.
Of the present invention can continuous and stable production and the stable composite core preparation technology of physical and chemical performance, by the temperature constant of glue groove, be 60 ℃, the temperature of the fiber infiltrating through resin in mould leading portion preheating zone is 105 ℃.
Of the present invention can continuous and stable production and stable leading portion curing mold corresponding to composite core preparation technology of physical and chemical performance, the first corresponding heating interval is 145 ℃; The second heating interval is 170 ℃; The 3rd heating interval is 165 ℃.Between rear curing area, adopt four sections of laser heating modes, the temperature of heating interval is 200 ℃.
Of the present invention can continuous and stable production and stable hauling speed corresponding to composite core preparation technology of physical and chemical performance be made as 0.35m/min.
According to above-mentioned can continuous and stable production and the sample for preparing of the stable composite core preparation technology of physical and chemical performance after testing, composite core glass transition temperature is 198 ℃, hot strength 2520MPa, composite core any surface finish, without roughness, the complete coating reinforced fiber of resin.
Embodiment 3
Of the present invention can continuous and stable production and the stable related resin formula of composite core preparation technology of physical and chemical performance, according to following proportioning: 100 parts of resins, 80 parts, curing agent, 5 parts of promoter, 2 parts of releasing agents.
Of the present invention can continuous and stable production and the stable composite core preparation technology of physical and chemical performance, by the temperature constant of glue groove, be 60 ℃, the temperature of the fiber infiltrating through resin in mould leading portion preheating zone is 110 ℃.
Of the present invention can continuous and stable production and stable leading portion curing mold corresponding to composite core preparation technology of physical and chemical performance, the first corresponding heating interval is 135 ℃; The second heating interval is 165 ℃; The 3rd heating interval is 160 ℃.Between rear curing area, adopt four sections of laser heating modes, the temperature of heating interval is 200 ℃.
Of the present invention can continuous and stable production and stable hauling speed corresponding to composite core preparation technology of physical and chemical performance be made as 0.4m/min.
According to above-mentioned can continuous and stable production and the sample for preparing of the stable composite core preparation technology of physical and chemical performance after testing, composite core glass transition temperature is 202 ℃, hot strength 2480MPa, composite core any surface finish, without roughness, the complete coating reinforced fiber of resin.
Above by special embodiment content description the present invention, but those skilled in the art also can recognize the multiple possibility of modification and optional embodiment, for example, by combining and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included in the present invention, scope of the present invention is enclosed patent claims and coordinate restriction thereof only.