CN101936085A - Composite material electric pole and structure design method thereof - Google Patents
Composite material electric pole and structure design method thereof Download PDFInfo
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- CN101936085A CN101936085A CN2010102354036A CN201010235403A CN101936085A CN 101936085 A CN101936085 A CN 101936085A CN 2010102354036 A CN2010102354036 A CN 2010102354036A CN 201010235403 A CN201010235403 A CN 201010235403A CN 101936085 A CN101936085 A CN 101936085A
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Abstract
The invention discloses a composite material electric pole and a structure design method thereof. The method comprises the following steps of: (1) designing the wall thickness of the electric pole, wherein the wall of the electric pole sequentially comprises an inner skin, a sandwich layer and an outer skin; (2) determining used raw materials, a proportion and a molding mode; (3) manufacturing a sample according to the requirement of electric power circuit engineering and finishing testing to acquire the elastic modulus and the Poisson's ratio performance parameters of the inner skin, the outer skin and the sandwich layer; determining the thicknesses and the laying modes of the inner skin, the outer skin and the sandwich layer; (4) constructing a solid model by utilizing finite element software ANSYS and applying a load; carrying out analog computation to acquire stress and deflection values of different working conditions and comparing with a design requirement; if the stress and the deflection values meet the design requirement, finishing designing; and if the stress and the deflection values do not meet the design requirement, returning to the step (3), repeating the steps (3) and (4) until the design requirement is met to finish designing. The electric pole is designed by utilizing the ANSYS software, the requirement on the safety coefficient of the structure is met, and meanwhile, the whole bending resistance of the electric pole is improved, which provides a beneficial reference for the application of the composite material in the power industry.
Description
Technical field
The present invention relates to a kind of composite material electric pole and this electric pole structure Design method thereof, belong to electric power facility parts and design field thereof.
Background technology
In the electric power facility field, traditional transmission of electricity bar, defective such as, corrosion heavy, perishable or cracking as ubiquity quality in long-time running such as rod, cement pole, steel pole and iron tower, poor durability, application life is shorter, and various potential safety hazards appear in construction transportation and operation maintenance difficulty easily.
Because fiber-reinforced resin matrix compound material (hereinafter to be referred as FRP) has intensity height, light weight, corrosion-resistant and characteristics such as fatigue performance, endurance quality and electrical insulation capability are good, performance can design, be the comparatively ideal selection of transmission of electricity bar structural meterials, the application form of at present external FRP on the transmission of electricity bar mainly contains the variable cross-section single pole.
Adopt composite material to make the consumption that the electric power bar can reduce insulator in each insulator string; Insulator string can be nearer from structure; Can reduce the spacing of phase line and phase line; Avoid under the thunderstruck design condition at satisfied shielding phase conductor, the height of lightning conducter can reduce, thereby makes the compact more of bar structure design.The superiority of coupled pole insulation is dodged pollution flashover, the mist that solves in the high-voltage transmission line pole tower operation, and particularly thunder and lightning tripping operation problem is significant.
In recent years, make electric pole with fiber-reinforced resin matrix compound material and have successfully report, but because the used composite material of its bar wall all adopts glass fiber and resin compound, under the situation of design weight that satisfies electric pole and rigidity composite request, though this electric pole overall weight reduces to some extent with respect to steel pole weight, the advantage of weight saving is little; Compare with rod, cement pole, steel pole and iron tower simultaneously, the thicker cost that increased of deck because of composite material electric pole is not suitable for applying.
Make the composite material electric pole can be more in light weight than existing electric pole, the rigidity height, simultaneously do not increase integrally-built manufacturing cost and maintenance cost again, a reasonable design scheme must be arranged, wall thickness, the material of its electric pole are carried out choose reasonable and laying by design means; Identical in view of the whole wall thickness of hollow electric pole simultaneously, its hollow position is the different architectural feature of internal diameter up and down, and stress during to different cross section and amount of deflection index request have nothing in common with each other; The stress and the amount of deflection in each cross section are adhered to specification, just can make the composite material electric pole of preparation moulding possess performance in light weight, that rigidity is high, cost is low.To so far, also do not see the relevant report of relevant composite material electric pole structure design aspect.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the object of the present invention is to provide a kind of have simultaneously composite material electric pole in light weight, that rigidity is high, cost is low and this structure Design method thereof.
To achieve these goals, the present invention adopts following technical scheme: a kind of composite material electric pole, comprise the body of rod, and its characteristics are: the wall thickness of the described body of rod is made as three layers, is followed successively by inside panel, laminboard layer and exterior skin from the inside to the outside; Described inside panel is 1: 2～2: 3 with the thickness ratio of exterior skin; The thickness of described laminboard layer is 9～11mm; Wherein, inside panel and exterior skin are the glass-fiber reinforced thermo-setting resin compound system and are entwined; Described enhancing thermosetting resin is by 90～100 parts of vinyl ester resins, 1～3 part in curing compound, and 0.2～1.5 part of accelerator, 1～3 part of aging-proof agent, mill base mixes for 0.2～1 part.
Above-mentioned laminboard layer can be selected any in the composite bed of the composite bed of composite bed, honeycomb ceramics and unsaturated polyester resin glue of quartz sand and unsaturated polyester resin glue or froth bed and unsaturated polyester resin glue for use.
To achieve these goals, the present invention also provides a kind of above-mentioned composite material electric pole structure Design method, comprise with traditional electric pole structure and be the step of its electric pole wall thickness of basic engineering and be covered with the step of anti-aging functional skin layer that it also has following steps at this electric pole outer wall:
1) this composite material electric pole wall thickness is designed to three layers, is respectively inside panel, laminboard layer and exterior skin from the inside to the outside; Wherein, inside panel and exterior skin fibreglass strengthen thermosetting resin winding layer formation;
2) determining step 1) raw material and the proportional quantity of described glass-fiber reinforced thermo-setting resin compound system; Determine the material and the molding mode of described laminboard layer;
3) according to the requirement of power circuitry engineering service condition, serve as the sample that the basis makes this composite material electric pole wall thickness with the form of step 1), and this sample is tested, obtain the elastic constants and the poisson's ratio performance parameter of inside panel, exterior skin and laminboard layer respectively;
4) modulus of elasticity that obtains by step 3) and the poisson's ratio thickness of determining described inside panel, exterior skin and described laminboard layer, and determine the ply sequence of glass fiber material in the described glass-fiber reinforced thermo-setting resin; Wherein, inside panel and exterior skin Thickness Design ratio are 1: 2～2: 3; The Thickness Design of laminboard layer is 9～11mm; Ply sequence twines for 90 °/0 °/54 °/90 °/0 °/90 ° successively with the winding direction angle;
5) among the winding direction angle importing finite element software ANSYS of the one-tenth-value thickness 1/10 of inside panel, exterior skin and the laminboard layer determined of the modulus of elasticity that step 3) is obtained, poisson's ratio and step 4) and described glass fiber material ply sequence, make up physical model, imposed load, analog computation obtain stress value and the deflection value of this composite material electric pole when the different loads operating mode;
6) the allowable stress value of getting the design of described composite material electric pole and the ratio of the stress value of step 5) acquisition obtain the value of safety factor value of this composite material electric pole; With this value of safety factor value and deflection value and designing requirement contrast, promptly the amount of deflection on described composite material electric pole top is less than or equal to 15 ‰ of whole pole height under the nominal situation condition then, and safety factor is more than or equal to 1.8; If meet design requirement, then finish the composite material electric pole structure Design, enter the step of molding component;
7) if stress and amount of deflection that step 5) obtains contrast through step 6), do not meet design requirement, then return step 4), adjust inside panel, the thickness of exterior skin and the ply sequence of fiber glass reinforcement; Repeating step 5) to step 6), described composite material electric pole structure Design is finished in the designing requirement that makes the stress that obtains and amount of deflection satisfy step 6).
Above-mentioned steps 2) described glass-fiber reinforced thermo-setting resin compound system is for twining in proper order with glass fiber in accordance with regulations deflection after the vinylite glue that normal temperature solidifies down floods, wherein, the vinyl ester resin glue is by 90～100 parts of vinyl ester resins, 1～3 part in curing compound, 0.2～1.5 part of accelerator, 1～3 part of aging-proof agent, mill base mixes for 0.2～1 part.
Above-mentioned steps 3) performance parameter of described inside panel and exterior skin is: under the condition of 16 ℃ of room temperatures, relative humidity 40%, twining with the glass fiber material tensile modulus of elasticity is 40.9Gpa, bending modulus is 11.2Gpa, modulus of shearing 5.2Gpa, and poisson's ratio is 0.33; The modulus of elasticity of described laminboard layer is 8.41GPa; Poisson's ratio is 0.36.
Above-mentioned steps 2) in, laminboard layer can have three kinds of Scheme Choice: one, used material are that quartz sand and unsaturated polyester resin glue are compound, and its forming step is:
1. determine that used quartz sand is graininess, its granularity is chosen as: the quartz sand size greater than 80% is 20～40 orders, and remaining quartz sand maximum particle size is less than 10 orders; Above-mentioned quartz sand is sprinkling upon on the described inside panel surface, spoons described unsaturated polyester resin glue at quartz sand surface;
2. getting gauze is set on the winding machine, under the tension force of 147～294N, this gauze and step 1) are drenched has the quartz sand of unsaturated polyester resin glue to lay synchronously, and with described unsaturated polyester resin glue and described quartz sand integral coating and be wound on the surface of described inside panel and form a stratified sand layer;
3. on step first floor burning into sand laminar surface 2., repeating step 1. to step 2., form second layer burning into sand layer;
4. utilize the pressure roll on the winding machine to come and go pressing steps double-layer sand inclusion layer 3. to be pressed, after being depressed into thickness and meeting design requirement, obtain described laminboard layer.
Its step 2. in, quartz sand and unsaturated polyester resin glue are with 7～7.5: 2.5～3 ratio is mixed; Step 2., the 3. described burning into sand layer thickness of step is respectively 4.5～5.5mm.
Its two, the used material of laminboard layer is that honeycomb ceramics and unsaturated polyester resin glue are compound, its forming step is:
1. get and the identical honeycomb ceramics of described laminboard layer thickness, before described inside panel resin is still uncured, this honeycomb ceramics is wrapped up to the top from the electric pole low side along diametric(al);
2. the honeycomb ceramics external surface that 1. wraps up in step twines and tightens with the glass strap, is solidified into one until honeycomb ceramics and inside panel;
3. step glass strap is 2. dismantled, evenly spray the unsaturated polyester resin glue to this honeycomb ceramics surface with watering can or spray gun;
4. treat that 3. step spray honeycomb ceramics normal temperature cure behind the glue after four hours, carry out the Wrapping formed of exterior skin at this honeycomb ceramics external surface.
Its three, the used material of laminboard layer is that froth bed and unsaturated polyester resin glue are compound, its forming step is:
1. get and the identical froth bed of described laminboard layer thickness, its material is a PVC dense foam plate, and this PVC dense foam plate density is 60-90kg/m
3The length of described PVC dense foam plate and width are determined respectively by the length of described electric pole inside panel and inside panel external diameter respectively and are cut into piece;
2. with step 1. the PVC dense foam plate after the cutting to put into temperature be 160 ℃ constant temperature oven, this PVC dense foam plate is softening;
3. step is 2. softening PVC dense foam plate is pressed into the arc that coincide with described inside panel external surface shape, manually drench one deck unsaturated polyester resin glue at this inside panel external surface then, the PVC dense foam plate and the described inside panel of curved shape is bonded to one;
4. pass through Wrapping formed described exterior skin at the 3. bonding all-in-one-piece PVC of step dense foam plate external surface.
The anti-aging functional skin layer that composite material electric pole outer wall of the present invention is covering, by age-inhibiting addition and vinyl ester resin with 2%～4%: 96%～98% ratio is formulated; Wherein, age-inhibiting addition is the combination agent of ultra-violet absorber and light stabilizer, and wherein: the mixed proportion of ultra-violet absorber and light stabilizer is 7: 3.
Owing to adopted technique scheme, beneficial effect of the present invention is as follows: 1) but by design scheme choose reasonable inside panel of the present invention, used raw material and proportioning between the raw material and the thickness of exterior skin, rationally set the thickness and the forming method of laminboard layer; Wherein, inside panel is spread the layer also available carbon fibre reinforcement instead of glass fiber reinforced material with exterior skin except that adopting fiber glass reinforcement to mix with vinylite; Sandwich material except that select for use quartz sand mix with vinylite Overmolded, materials such as also available foam or honeycomb are replaced quartz sand burning into sand layer and are made sandwich structure, all can effectively reduce the weight of composite material electric pole, its weight is about steel electric pole weight 80%.2) laminboard layer adopts low-cost quartz sand, and with the composite material electric pole of making of fiber glass reinforcement entirely, its cost declines to a great extent.3) because the composite material electric pole weight saving after the moulding can make things convenient for installation, reduce constructor's labour intensity; Simultaneously can also reduce width of corridor, can be under the requirement of satisfying the structural safety coefficient by increasing laminboard layer thickness to improve the whole anti-bending strength of this electric pole, effectively solve in the prior art, the defective of aspects such as the big frangibility of electric pole amount of deflection, in the application of actual track, can improve margin of safety.4) method for designing of this composite material electric pole provides reference for the application of composite material in power industry, utilize finite element ANSYS the structure of composite material electric pole to be carried out the design of system, by changing the thickness of inside and outside covering and laminboard layer by a certain percentage, the stress of this composite material electric pole is conformed to designing requirement with amount of deflection; Wherein, inside panel, exterior skin and laminboard layer structure all adopt existing winding process moulding; Its reasonable in design, easy operating, the final composite material electric pole that forms advantages such as having in light weight, service life of length, good insulation performance.
Description of drawings
Fig. 1 is the schematic cross-section of composite material electric pole structure
The specific embodiment
Composite material electric pole structure Design method of the present invention, it is the load-up condition that can bear according to electric pole structure under the electric pressure of use circuit, the different operating mode by Electric Power Design Institute, whole electric pole wall thickness in the prior art is used glass fiber vinylite composite material fully, change into the composite material electric pole that a kind of centre has laminboard layer; By by glass fiber vinylite composite material Wrapping formed inside panel, exterior skin, and the laminboard layer that folder is established between inside panel and exterior skin, adopting ripe winding process to carry out processing and manufacturing is whole electric pole structure; Simultaneously the preset thickness of inside panel, exterior skin, laminboard layer and the canoe of glass fiber vinylite composite material are imported in the finite element ANSYS, utilize this software program that its data are analyzed, calculated checking, optimize and improve, the thickness of exterior skin and burning into sand layer under the requirement of satisfying required rigidity of electric pole and intensity, finally determining; If meet design requirement, can determine the inside panel of composite material electric pole and the thickness of exterior skin; If can not meet design requirement, also can adjust the thickness of inside panel and exterior skin by the recomputating of software, it is met design requirement.
Because exterior skin is main bearing structure layer, and in conjunction with the finite element Calculation results, inside panel is chosen in 1: 2 with outer frisket thickness proportion～2: 3 scopes in.
As shown in Figure 1, composite material electric pole wall thickness of the present invention is designed to three layers, and its internal layer is designed to the inside panel 1 of composite material electric pole, and external surface design one deck of inside panel 1 is a laminboard layer 2, and laminboard layer 2 skins are exterior skin 3.Inside panel 1 all adopts glass fiber vinylite compound system to be entwined with exterior skin 3; And laminboard layer 2 has three kinds of design schemes, a kind ofly is: with the laminboard layer of quartz sand and the composite molding of unsaturated polyester resin glue; Second kind is: with the laminboard layer of honeycomb ceramics and the composite molding of unsaturated polyester resin glue; The third is: with the laminboard layer of froth bed and the composite molding of unsaturated polyester resin glue; The thickness of above-mentioned laminboard layer is determined, is 9～11mm.
Below, method for designing of the present invention is further described by instantiation.
Example 1:
Method for designing of the present invention comprises with traditional electric pole structure being the step of its electric pole wall thickness of basic engineering and being covered with the step of anti-aging functional skin layer at this electric pole outer wall that concrete steps are as follows:
1) this composite material electric pole wall thickness is designed to three layers, is respectively inside panel, laminboard layer and exterior skin from the inside to the outside; Wherein, inside panel and exterior skin fibreglass strengthen thermosetting resin winding layer formation;
2) determining step 1) used raw material and the proportional quantity of described glass-fiber reinforced thermo-setting resin compound system; Determine the material and the molding mode of described laminboard layer; Wherein, the glass-fiber reinforced thermo-setting resin compound system for the several layers glass fiber respectively after the vinylite glue that normal temperature solidifies down floods in accordance with regulations winding direction angle twine in proper order, wherein, the vinyl ester resin glue is by 100 parts of vinyl ester resins, 3 parts in curing compound, 1.5 parts of accelerator, 3 parts of aging-proof agents, mill base mixes for 1 part; Used glass fiber is totally 37 layers;
3), serve as the sample that the basis makes this composite material electric pole wall thickness with the form of step 1), and this sample is tested according to the requirement of line project service condition; Obtain the elastic constants and the poisson's ratio performance parameter of inside panel, exterior skin and laminboard layer respectively; Wherein, the elastic constants of inside panel, exterior skin and poisson's ratio are: under 16 ℃ of room temperatures, relative humidity 40% condition, twining with the glass fiber material tensile modulus of elasticity is 40.9GPa; Bending modulus is 11.2GPa; Modulus of shearing 5.2GPa; Poisson's ratio is 0.33; The modulus of elasticity of laminboard layer is 8.41GPa; Poisson's ratio is 0.36; Finish the used testing equipment of test and select general cupping machine for use; Testing standard adopts shear strength test method, GB1450.2-2005 fibre reinforced plastics punching type shear strength test method between GB1447-2005 fibre reinforced plastics Erichsen test method, GB/T1448-2005 fibre reinforced plastics compression performance test method, GB1449-2005 fibre reinforced plastics bending property test method, GB1450.1-2005 fiber-reinforced plastic layer.
4) thickness of determining described inside panel, exterior skin and laminboard layer by the modulus of elasticity and the equivalent Design Fundamentals of poisson's ratio of step 3) acquisition, confirm that according to inside panel thickness and 2: 3 design proportion of exterior skin thickness the inside panel Thickness Design is 4mm, the exterior skin Thickness Design is 6mm; Simultaneously, determine the ply sequence of glass fiber material in the used glass-fiber reinforced thermo-setting resin of inside panel and exterior skin, described ply sequence carries out with 90 °/0 °/54 °/90 °/0 °/90 ° orders in winding direction angle;
5) modulus of elasticity that step 3) is obtained, the inside panel that poisson's ratio and step 4) are determined, among the data importing finite element software ANSYS of the thickness of exterior skin and laminboard layer and glass fiber material ply sequence, use Preprocessor-modeling order structure physical model in the ANSYS program, Preprocessor-solution-define loads order imposed load on this physical model, carry out analog computation by Preprocessor-solution-solve-current LS order then, obtain stress value 302MPa and the deflection value 261mm of this composite material electric pole when the different loads operating mode respectively by General postprocessor-plotresults-contourplot-nodal solution-stress-von Mises stress in the post-processing stages and General postprocessor-plotresults-contourplot-DOFsolution-displa cement vector sum at last;
6) get the allowable stress value 547MPa of described composite material electric pole design, with the ratio of the stress value 302MPa of this allowable stress value and step 5) acquisition, i.e. safety factor
Obtain the value of safety factor value 1.81 of this composite material electric pole; Deflection value 261mm that this value of safety factor value and step 5) program are calculated and designing requirement contrast then, promptly the amount of deflection on described composite material electric pole top is less than whole pole height H * 15 ‰ under the nominal situation condition, and safety factor is greater than 1.8; The result meets design requirement, and then finishes the composite material electric pole structure Design, enters the step of molding component.
Confirmed to meet the composite material electric pole that safety factor requires by step 4), determine that inside panel thickness is 4mm, exterior skin thickness is 6mm; The laminboard layer Thickness Design is 10mm; According to this thickness requirement, every layer of glass fabric be impregnated in succession the winding direction angle with step 4) is wrapped in the outer inside panel that constitutes this electric pole of default electric pole mould with this glass fabric behind the vinyl ester resin glue; At inside panel external surface moulding laminboard layer;
This laminboard layer adopts the design scheme of quartz sand and the composite molding of unsaturated polyester resin glue, and concrete steps are:
1. determine that used quartz sand is graininess, its granularity is chosen as: the quartz sand size greater than 80% is 20～40 orders, and remaining quartz sand maximum particle size is less than 10 orders; Above-mentioned quartz sand evenly is sprinkling upon on the surface of inside panel, spoons described unsaturated polyester resin glue at quartz sand surface;
2. get gauze and be enclosed within on the winding machine, and under the tension force of 147～294N, lay synchronously, with quartz sand with drench in its surperficial unsaturated polyester resin glue integral coating and be wound on the surface of inside panel and form a stratified sand layer with step 1).
3. on step burning into sand layer 2., repeating step 1. to step 2.; Generally speaking, the pouring that gauze coats has insatiable hunger to close the mylar glue and quartz sand compound formation burning into sand layer is 2 layers, and every layer thickness is 4.5～5.5mm; Quartz sand and unsaturated polyester resin glue are with 7～7.5: 2.5～3 ratio is mixed; Be as the criterion with the thickness range that meets design requirement, constitute laminboard layer to be pressed;
4. utilize the pressure roll on the winding machine to come and go pressing steps laminboard layer 3. to be pressed, with its laminboard layer pressing, jam-packed, make its thickness reach the thickness of designing requirement; Obtain the laminboard layer that constitutes by 2 stratified sand layers.
After treating above-mentioned laminboard layer solidified forming, twine exterior skin at its external surface again, this exterior skin is entwined with the winding direction angle identical with inside panel by the glass fabric behind vinyl ester resin glue dipping.
Example 2:
Method for designing of the present invention, basic identical with example 1, its difference is:
Step 2) in the used raw material and proportional quantity of described glass-fiber reinforced thermo-setting resin compound system, glass fiber is 37 layers; Used vinyl ester resin glue is by 90 parts of vinyl ester resins, 1 part in curing compound, and 0.2 part of accelerator, 1 part of aging-proof agent, mill base mixes for 0.2 part;
Step 4) is determined the thickness of inside panel, exterior skin and laminboard layer, confirms that according to inside panel thickness and 2: 3 design proportion of exterior skin thickness the inside panel Thickness Design is 3mm, and the exterior skin Thickness Design is 4.5mm;
The allowable stress value 547MPa that step 6) is got the design of described composite material electric pole and the ratio of the stress value 365MPa that calculates through step 5) finite element software ANSYS program obtain the value of safety factor value 1.49 of this composite material electric pole; This value of safety factor value and designing requirement contrast, safety factor does not meet design requirement less than 1.8; Simultaneously, the deflection value that calculates through step 5) finite element software ANSYS program is 350mm, and with the contrast of designing requirement value, this deflection value does not meet design requirement greater than height value H * 15 ‰ of this composite material electric pole under the nominal situation condition; At this moment, then step 4) be need return, the thickness of inside panel, exterior skin and the ply sequence of fiber glass reinforcement redefined; Concrete operations are: repeating step 5), repeat to make up the physical model program, and imposed load, the analog computation supervisor directly changes the thickness parameter of each deck by the ANSYS software command, increases inside and outside covering thickness in proportion; After making the stress value that obtains after the analog computation and deflection value satisfy the designing requirement of step 6) fully, finish described composite material electric pole structure Design; Enter the step of molding component.
Reaffirm that through step 4) the inside panel thickness that meets the safety factor requirement is 4mm, exterior skin thickness is 6mm; The laminboard layer Thickness Design is 9mm; According to this thickness requirement, every layer of glass fabric be impregnated in succession the winding direction angle with step 4) is wrapped in the outer inside panel that constitutes this electric pole of default electric pole mould with this glass fabric behind the vinyl ester resin glue; At inside panel external surface moulding laminboard layer;
This laminboard layer adopts the design scheme of honeycomb ceramics and the composite molding of unsaturated polyester resin glue, and its concrete operations are:
1. determine that honeycomb ceramics thickness is identical with predefined laminboard layer thickness, wraps up this honeycomb ceramics from the electric pole low side along diametric(al) to the top before the inside panel surface resin is still uncured;
2. the honeycomb ceramics external surface that 1. wraps up in step twines and tightens with the glass strap, is solidified into one until honeycomb ceramics and inside panel;
3. step glass strap is 2. dismantled, evenly spray the unsaturated polyester resin glue to the honeycomb ceramics surface with watering can or spray gun;
4. treat that four hours aftershapings of honeycomb ceramics normal temperature cure that 3. step sprays behind the glue are described laminboard layer.
Behind this laminboard layer solidified forming, twine exterior skin at its external surface, this exterior skin is entwined with the winding direction angle identical with inside panel by the glass fabric behind vinyl ester resin glue dipping.
Example 3:
Method for designing of the present invention, basic identical with example 1, its difference is:
Step 2) in the used raw material and proportional quantity of described glass-fiber reinforced thermo-setting resin compound system, glass fiber is 37 layers, wherein in 13 layers of friskets, 24 layers of exterior skins; Used vinyl ester resin glue is by 95 parts of vinyl ester resins, 2 parts in curing compound, and 1 part of accelerator, 2 parts of aging-proof agents, mill base mixes for 0.6 part;
Step 4) is determined the thickness of inside panel, exterior skin and laminboard layer, confirms that according to inside panel thickness and 1: 2 design proportion of exterior skin thickness the inside panel Thickness Design is 4mm, and the exterior skin Thickness Design is 8mm;
Step 5) is used ANSYS program construction physical model in finite element software ANSYS, imposed load on this physical model obtains stress value 217MPa and the deflection value 228mm of this composite material electric pole when the different loads operating mode by analog computation;
The allowable stress value 547MPa that step 6) is got the design of described composite material electric pole and the ratio of the stress value 217MPa that calculates through finite element software ANSYS program obtain the value of safety factor value 2.52 of this composite material electric pole; With the deflection value 228mm and the contrast of designing requirement value of this value of safety factor value and step 5) acquisition, the amount of deflection on described composite material electric pole top is less than 15 ‰ of whole pole height under the nominal situation condition, and safety factor is greater than 1.8; Adhere to specification, finish described composite material electric pole structure Design.
The inside panel thickness that affirmation meets the composite material electric pole of safety factor requirement is 4mm, and exterior skin thickness is 8mm; The laminboard layer Thickness Design is 9～11mm; According to this thickness requirement, glass fabric be impregnated in behind the vinyl ester resin glue inside panel that the skin that this glass fabric is wrapped in the electric pole mould with the winding direction angle of step 4) constitutes this electric pole; At inside panel external surface moulding laminboard layer;
This laminboard layer adopts the design scheme of froth bed and the composite molding of unsaturated polyester resin glue, and concrete steps are:
1. determine that the froth bed design thickness is 10mm, its material is a PVC dense foam plate, and this PVC dense foam plate density is 60-90kg/m
3And PVC dense foam plate is carried out cutting according to the length and the external diameter of electric pole inside panel;
2. with step 1. the PVC dense foam plate after the cutting put into the constant temperature oven two minutes of 160 ℃ temperature, with material softening;
3. step is 2. softening PVC dense foam plate is pressed into the arc that coincide with described inside panel external surface shape, manually drench one deck unsaturated polyester resin glue at this inside panel external surface then, the PVC dense foam plate and the described inside panel of curved shape is bonded to one;
4. twine the described exterior skin of preparation at the 3. bonding all-in-one-piece PVC of step dense foam plate external surface.
In above-mentioned 3 examples, in the Wrapping formed process of composite material electric pole exterior skin, obtain certain thickness anti-aging functional layer by in resin, adding materials such as ultra-violet absorber, fire retardant; Concrete operations are: in the exterior skin winding process, added age-inhibiting addition and vinyl ester resin composition prepared, the consumption of age-inhibiting addition accounts for 2%～4% of used vinyl ester resin total amount; Used age-inhibiting addition is selected the composition of ultra-violet absorber and light stabilizer for use, and wherein, the commercially available model of ultra-violet absorber employing is that ultra-violet absorber and the model of UV-326 is the light stabilizer of B-225; Ultra-violet absorber and light stabilizer make up with 7: 3 ratio.
In the design scheme of above-mentioned example 2 and example 3, used unsaturated polyester resin glue can be selected 306 commercially available polyester glues or 3061 polyester glues for use.
Claims (10)
1. a composite material electric pole comprises the body of rod, it is characterized in that: the wall thickness of the described body of rod is made as three layers, is followed successively by inside panel, laminboard layer and exterior skin from the inside to the outside; Described inside panel is 1: 2～2: 3 with the thickness ratio of exterior skin; The thickness of described laminboard layer is 9～11mm; Wherein, inside panel and exterior skin are the glass-fiber reinforced thermo-setting resin compound system and are entwined; Described enhancing thermosetting resin is by 90～100 parts of vinyl ester resins, 1～3 part in curing compound, and 0.2～1.5 part of accelerator, 1～3 part of aging-proof agent, mill base mixes for 0.2～1 part.
2. composite material electric pole according to claim 1 is characterized in that: described laminboard layer be in the composite bed of the composite bed of composite bed, honeycomb ceramics and unsaturated polyester resin glue of quartz sand and unsaturated polyester resin glue or froth bed and unsaturated polyester resin glue any.
3. composite material electric pole structure Design method comprises with traditional electric pole structure being the step of its electric pole wall thickness of basic engineering and being covered with the step of anti-aging functional skin layer at this electric pole outer wall that it also has following steps:
1) this composite material electric pole wall thickness is designed to three layers, is respectively inside panel, laminboard layer and exterior skin from the inside to the outside; Wherein, inside panel and exterior skin fibreglass strengthen thermosetting resin winding layer formation;
2) determining step 1) raw material and the proportional quantity of described glass-fiber reinforced thermo-setting resin compound system; Determine the material and the moulding of described laminboard layer;
3) according to the requirement of power circuitry engineering service condition, form with step 1) is the sample that the basis makes this composite material electric pole material therefor, and this sample tested, obtain the elastic constants and the poisson's ratio performance parameter of inside panel, exterior skin and laminboard layer respectively;
4) modulus of elasticity that obtains by step 3) and the poisson's ratio thickness of determining described inside panel, exterior skin and described laminboard layer, and determine the ply sequence of glass fiber material in the described glass-fiber reinforced thermo-setting resin; Wherein, inside panel and exterior skin Thickness Design ratio are 1: 2～2: 3; The Thickness Design of laminboard layer is 9～11mm; Ply sequence twines for 90 °/0 °/54 °/90 °/0 °/90 ° successively with the winding direction angle;
5) among the winding direction angle importing finite element software ANSYS of the one-tenth-value thickness 1/10 of inside panel, exterior skin and the laminboard layer determined of the modulus of elasticity that step 3) is obtained, poisson's ratio and step 4) and described glass fiber material ply sequence, make up physical model, imposed load, analog computation obtain stress value and the deflection value of this composite material electric pole when the different loads operating mode;
6) the allowable stress value of getting the design of described composite material electric pole and the ratio of the stress value of step 5) acquisition obtain the value of safety factor value of this composite material electric pole; With this value of safety factor value and deflection value and designing requirement contrast, promptly the amount of deflection on described composite material electric pole top is less than or equal to 15 ‰ of whole pole height under the nominal situation condition then, and safety factor is more than or equal to 1.8; If meet design requirement, then finish the composite material electric pole structure Design, enter the step of molding component;
7) if stress and amount of deflection that step 5) obtains contrast through step 6), do not meet design requirement, then return step 4), adjust inside panel, the thickness of exterior skin and the ply sequence of fiber glass reinforcement; Repeating step 5) to step 6), described composite material electric pole structure Design is finished in the designing requirement that makes the stress that obtains and amount of deflection satisfy step 6).
4. according to the described composite material electric pole structure Design of claim 3 method, it is characterized in that: step 2) described glass-fiber reinforced thermo-setting resin compound system is for twining in proper order with glass fiber in accordance with regulations deflection after the vinylite glue that normal temperature solidifies down floods, wherein, the vinyl ester resin glue is by 90～100 parts of vinyl ester resins, 1～3 part in curing compound, 0.2～1.5 part of accelerator, 1～3 part of aging-proof agent, mill base mixes for 0.2～1 part.
5. according to the described composite material electric pole structure Design of claim 3 method, it is characterized in that: the performance parameter of described inside panel of step 3) and exterior skin is: under the condition of 16 ℃ of room temperatures, relative humidity 40%, twining with the glass fiber material tensile modulus of elasticity is 40.9Gpa, bending modulus is 11.2Gpa, modulus of shearing 5.2Gpa, poisson's ratio is 0.33; The modulus of elasticity of described laminboard layer is 8.41GPa; Poisson's ratio is 0.36.
6. according to the described composite material electric pole structure Design of claim 3 method, it is characterized in that: step 2) material of described laminboard layer is that quartz sand and unsaturated polyester resin glue are compound, its forming step is:
1. determine that used quartz sand is graininess, its granularity is chosen as: the quartz sand size greater than 80% is 20～40 orders, and remaining quartz sand maximum particle size is less than 10 orders; Above-mentioned quartz sand is sprinkling upon on the described inside panel surface, spoons described unsaturated polyester resin glue at quartz sand surface;
2. getting gauze is set on the winding machine, under the tension force of 147～294N, this gauze and step 1) are drenched has the quartz sand of unsaturated polyester resin glue to lay synchronously, and with described unsaturated polyester resin glue and described quartz sand integral coating and be wound on the surface of described inside panel and form a stratified sand layer;
3. on step first floor burning into sand laminar surface 2., repeating step 1. to step 2., form second layer burning into sand layer;
4. utilize the pressure roll on the winding machine to come and go pressing steps double-layer sand inclusion layer 3. to be pressed, after being depressed into thickness and meeting design requirement, obtain described laminboard layer.
7. according to the described composite material electric pole structure Design of claim 6 method, it is characterized in that: 2. described quartz sand of step and unsaturated polyester resin glue are with 7～7.5: 2.5～3 ratio is mixed; Step 2., the 3. described burning into sand layer thickness of step is respectively 4.5～5.5mm.
8. according to the described composite material electric pole structure Design of claim 4 method, it is characterized in that: step 2) material of described laminboard layer is that honeycomb ceramics and unsaturated polyester resin glue are compound, its forming step is:
1. get and the identical honeycomb ceramics of described laminboard layer thickness, before described inside panel resin is still uncured, this honeycomb ceramics is wrapped up to the top from the electric pole low side along diametric(al);
2. the honeycomb ceramics external surface that 1. wraps up in step twines and tightens with the glass strap, is solidified into one until honeycomb ceramics and inside panel;
3. step glass strap is 2. dismantled, evenly spray the unsaturated polyester resin glue to this honeycomb ceramics surface with watering can or spray gun;
4. treat that 3. step spray honeycomb ceramics normal temperature cure behind the glue after four hours, carry out the Wrapping formed of exterior skin at this honeycomb ceramics external surface.
9. according to the described composite material electric pole structure Design of claim 4 method, it is characterized in that: step 2) material of described laminboard layer is that froth bed and unsaturated polyester resin glue are compound, its forming step is:
1. get and the identical froth bed of described laminboard layer thickness, its material is a PVC dense foam plate, and this PVC dense foam plate density is 60-90kg/m
3The length of described PVC dense foam plate and width are determined respectively by the length of described electric pole inside panel and inside panel external diameter respectively and are cut into piece;
2. with step 1. the PVC dense foam plate after the cutting to put into temperature be 160 ℃ constant temperature oven, this PVC dense foam plate is softening;
3. step is 2. softening PVC dense foam plate is pressed into the arc that coincide with described inside panel external surface shape, manually drench one deck unsaturated polyester resin glue at this inside panel external surface then, the PVC dense foam plate and the described inside panel of curved shape is bonded to one;
4. pass through Wrapping formed described exterior skin at the 3. bonding all-in-one-piece PVC of step dense foam plate external surface.
10. according to each described composite material electric pole structure Design method of claim 3～9, it is characterized in that: described anti-aging functional skin layer by age-inhibiting addition and vinyl ester resin with 2%～4%: 96%～98% ratio is formulated; Wherein, age-inhibiting addition is the combination agent of ultra-violet absorber and light stabilizer, and wherein: the mixed proportion of ultra-violet absorber and light stabilizer is 7: 3.
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Effective date of registration: 20190129 Address after: 277500 South of Beixin West Road, Tengzhou City, Zaozhuang City, Shandong Province (Luban Avenue West, College West Road North) Patentee after: Beibao Power Composite Co., Ltd. Address before: 102101 No. 261 Kangxi Road, Badaling Industrial Development Zone, Yanqing County, Beijing Patentee before: Beijing FRP Research & Design Institute Composite Co., Ltd. |