CN104278875A - Bionic bamboo joint type transmission tower made of composite materials - Google Patents

Abstract

The invention relates to a bionic bamboo joint type transmission tower made of composite materials. The transmission tower is suitable for below-110V electric transmission lines and comprises a tower body and a horizontal component perpendicularly connected with the tower body, the horizontal component comprises a ground wire support located at the top end of the tower body and a cross arm located below the ground wire support, the tower body is of a bionic bamboo joint type structure, protrusions like bamboo joints are distributed on the tower body, and the overall tower body is in a bamboo shape and formed by overlaying bamboo-shaped composite material pipes. Due to the bamboo shape of the tower body, tensile stiffness, compressional stiffness, flexural stiffness and rotational stiffness of the tower body are improved, the influence of wind deflection and icing on the tower can be effectively reduced, stability of the tower under severe weathers can be improved, and the transmission tower can be used for areas with severe corrosion, and has the advantages that manufacturing cost is low, transporting, mounting and repairing cost is low, and line corridors are reduced.

Description

The bionical shape composite material transmission tower of a kind of ring

Technical field:

The present invention relates to work transmission line, more specifically relate to the bionical shape composite material transmission tower of a kind of ring.Background technology:

At present, the shaft tower in transmission line of electricity generally comprises steel tower and concrete frame, and wherein steel are a kind of electric conductors, and quality is heavy and perishable, so Steel Structure is not optimal shaft tower material.Concrete frame quality is heavier than steel, thus causes transport and install difficulty, and easily affected by environment.And composite material pole tower is due to its excellent combination property, the feature such as high in intensity, lightweight, corrosion-resistant, good insulating, progressively obtains application.

Composite material at present progressively replaces timber and metal alloy, is widely used in the field such as Aero-Space, automobile, electric, building, body-building apparatus, is in recent years obtaining develop rapidly especially.Along with the development of science and technology, resin and glass fiber be constantly progress technically, and the manufacturing capacity of manufacturer generally improves, and the Costco Wholesale of glass fibre reinforced composite material is accepted by many industries.The successful operation of composite insulator and compound core conducting wire in transmission line of electricity, has expanded the range of application of composite material in electrical network further.

The composite material of shaft tower mainly selects glass fiber reinforced plastics composite material, and fortifying fibre selects glass fiber usually, and aathermoset resin system selected by resin.Main feature comprises: (1) high-strength light, and stretch, bending and compressive strength all can reach more than 400Mpa, density is generally less than 2.2g/cm ³; Therefore can reduce transport and the difficulty of construction of shaft tower, improve the construction efficiency of electrical network, particularly in the application in transport difficult area.(2) good corrosion resistance, has fine and close three-dimensional net structure after composite inner resin solidification, have the medium corrosion resisting properties such as excellent acid and alkali resistance, salt and organic solvent; Extent of corrosion that is coastal and heavy industrial area shaft tower can be reduced, extend shaft tower application life, reduce shaft tower maintenance cost.(3) composite material pole tower has good insulating properties, line corridor width (maximum compressible more than 30%) effectively can be reduced at 110KV and above circuit, reduce windage yaw accident, economize the land resource, reduce the overall operation maintenance cost of transmission line of electricity.

Composite material can, by selecting suitable raw material and rational layering type, make composite element or composite structure meet instructions for use.The anti-fatigue performance of composite material is good.And the fatigue strength of common metal is 40 ~ 50% of tensile strength, but some composite material can up to 70 ~ 80%.The fatigue fracture of composite material is from matrix, expands to gradually on the interface of fiber and matrix, does not have paroxysmal change.Therefore, composite material has omen before destruction, can check and remedy.The Some features of composite material is very suitable for tower structure, the defect such as not only can overcome that the ubiquitous quality of traditional transmission tower is heavy, perishable, corrosion or cracking, poor durability, application life are shorter, effectively can also alleviate metal or the difficulty of concrete shaft tower in construction transport and operation maintenance.In recent years, along with the further reduction of domestic composite material cost, the continuous progress of composite material manufacture craft, the research and apply condition of composite material pole tower possesses, and the technological reserve realizing complex pole tower has important practical significance to operation of power networks.

Composite material pole tower is applied in global portion area, and that wherein develops and apply relative maturity has the companies such as RS and Strongwell.The composite material pole tower of RS company exploitation comes into operation in European and American areas.About 300 base door shape composite material pole towers have been installed in 230kV transmission system by such as Canadian big lake Utilities Electric Co., also have 90 base complex pole towers just to come into operation in other electric pressure transmission system in addition.In Norway, the door shape composite material pole tower that use 170 base RS company produces by the 132kV transmission line of electricity of long 50 kilometers.Because composite material modulus is little, composite material single pole is out of shape comparatively large when stressed, adopts the composite material pole tower of door shape to effectively reduce distortion, and also by cracking in composite material pole tower process under arms, and crackle is expanded with machine direction.The ring biomimetic features that transmission tower of the present invention adopts can reduce the distortion of composite material single pole, and node can be utilized to stop crackle to be expanded along machine direction.Summary of the invention:

The object of this invention is to provide the bionical shape composite material transmission tower of a kind of ring, this shaft tower is applicable in below 110KV transmission line of electricity.The bionical shape composite material transmission tower of ring in the present invention can increase the tension/pressure rigidity of shaft tower tower body, bending rigidity and rotational stiffness, effectively can reduce windage yaw, icing to the impact of shaft tower, the stability of shaft tower in inclement weather can be increased, can be used for seriously corroded area, and have that cost is lower, transport, installation, maintenance expense is less, reduces the advantage of line corridor.

For achieving the above object, the present invention is by the following technical solutions: the bionical shape composite material transmission tower of a kind of ring, this shaft tower is applicable in below 110KV transmission line of electricity, described shaft tower comprises the tower body and transverse member that are vertically connected to one another, described transverse member comprises the cross-arm below the earth wire support on tower body top and described earth wire support, described tower body is bamboo shape, and described tower body is formed by stacking by bamboo shape composite material tube.

The bionical shape composite material transmission tower of a kind of ring provided by the invention, described composite material tube is at least three, and adjacent two described composite material tubes are by the mutual grafting of connector.

The bionical shape composite material transmission tower of a kind of ring provided by the invention, described connector is that composite material is made, described connector comprises disk and is arranged on the upper and lower cylinder of disk, described cylindrical radius is identical with the described composite material bore be connected, and described connector is connected with described composite material tube by cementing agent.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described composite material tube is formed by stacking by internode, described internode comprises axial parallel-segment and is symmetricly set on the curved section at parallel-segment two ends, adjacent two described internode places are node, and described node is bamboo joint structure.

The bionical shape composite material transmission tower of a preferred a kind of ring more provided by the invention, is characterized in that: described internode is 3-6, and described intra-node radial direction is provided with dividing plate.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described dividing plate be circular netted lattice aluminium sheet, described dividing plate upper and lower surface is welded with aluminium sheet.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described composite material tube is laminated construction, and described lamination comprises internal layer, middle level and skin from inside to outside successively; Described internal layer is tubular fiber layer; Described middle level and described skin are as bamboo shape fibrage.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention,

Described internal layer is at least divided into 5 layers of tubular fiber layer from inside to outside, the fiber of described internal layer along tubular fiber layer from the inside to the outside and its axially between the angle angle that is followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angular circulation;

Angle between the fiber in described middle level and described middle level axis is that 90 ° of directions are laid;

Described outer layer fiber layer is at least 2 layers, described outer field fiber along outer layer fiber layer from the inside to the outside and its axially between angle be that the angle of 0 ° and 90 ° is laid fiber and lays according to this angular circulation.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention,

Described internal layer is 5 layers of tubular fiber layer, the fiber of described internal layer along tubular fiber layer from the inside to the outside and its axially between the angle angle that is followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angular circulation;

Described outer layer fiber layer is at least 2 layers, described outer field fiber along outer field fibrage from the inside to the outside and its axially between angle be that the angle of 0 ° and 90 ° is laid.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described internal layer thickness is at least 40% of described laminated thickness; The maximum thickness in described middle level is at least 30% of described laminated thickness; Described outer layer thickness is at least 25% of described laminated thickness.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, the Nodes fiber thickness in described middle level is greater than the zone fiber thickness of the curved section in middle level.

The bionical shape composite material transmission tower of a kind of ring of another preferred one provided by the invention, is characterized in that: top and the bottom of described composite material tube are all sealed by fluid sealant.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described composite material tube adopts the method for variable cross-section pultrusion to make.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described composite material tube is that composite material is made, described composite material comprises fiber and strengthens resin, described fiber adopts the fiber of high-modulus, described enhancing resin adopts heat-resisting, ageing-resistant, the resin material that insulating properties is strong.

The bionical shape composite material transmission tower of another preferred a kind of ring provided by the invention, described composite material tube with the addition of green coloring agent in manufacturing process.

Owing to have employed technique scheme, the beneficial effect that the present invention obtains is:

1, in the present invention, transmission tower is by arranging the bionical node of ring, and increase the tension/pressure rigidity of tower body, bending rigidity and rotational stiffness reduce the distortion of tower entirety; Effectively can prevent composite material pole tower from causing due to Crack Extension shaft tower bearing capacity to decline fast, there is no omen and the danger of directly collapsing;

2, transmission tower good looking appearance in the present invention, can merge mutually with the Nature;

3, the present invention is that power transmission and transformation line devises a kind of scientific structure, and bearing capacity is reasonable, the bionical shape composite material pole tower of the ring coordinated mutually with natural environment;

4, in the present invention, the effect supporting shaft tower is played in the design of the fibre structure internal layer of transmission tower, can improve the bearing capacity of shaft tower;

5, in the present invention, the middle level of the fibre structure of transmission tower is the primary structure of composition node, can play and increase near nodal tension and compression rigidity, the effect of the strengthening such as bending rigidity mechanical property;

6, in the present invention, the outer field stressed of fibre structure of transmission tower is position maximum in total, and skin will play the effect stoping crackle to be expanded from an internode to another one internode.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of transmission tower of the present invention;

Fig. 2 is the schematic diagram of transmission tower internode of the present invention;

Fig. 3 is the assembling schematic diagram between composite material tube of the present invention;

Fig. 4 is the front view of composite material pipe connections of the present invention;

Fig. 5 is the top view of composite material pipe connections of the present invention;

Fig. 6 is transmission tower fibre structure schematic diagram of the present invention;

Fig. 7 is the sectional drawing of composite separator of the present invention;

Fig. 8 is the inner cancelled structure schematic diagram of composite separator of the present invention;

Fig. 9 is the overall diagram of composite separator of the present invention;

Figure 10 is the stressed schematic diagram of transmission tower of the present invention;

Figure 11 is the Rigidity Calculation parameter schematic diagram of transmission tower of the present invention;

Wherein, 1-composite bar, 2-node, 3-composite material tube, 4-connector, 5-dividing plate, 6-internode, 7-earth wire support, 8-earth wire support anchor ear, upper cross-arm anchor ear (a) of 9-, cross-arm suspension rod under 10-, 11-bracing wire, the upper wedge clamp of 12-, wedge clamp under 13-, 14-cable quadrant, 15-chassis, cross-arm anchor ear (a) under 16-, cross-arm under 17-, cross-arm anchor ear (b) under 18-, the upper cross-arm of 19-, the upper cross-arm suspension rod of 20-, upper cross-arm anchor ear (b) of 21-.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be described in further detail.

Embodiment 1:

As shown in Figure 1, the transmission tower of this example is used in the electric line of below 110KV, described transmission tower comprises the tower body and transverse member that are vertically connected to one another, described transverse member comprise top radial direction arrange earth wire support 7 and described earth wire support 7 below cross-arm, tower body described in the present embodiment adopts bamboo shape composite bar 1, described composite bar 1 is formed by stacking by multiple bamboo shape composite material tube 3, and described composite material tube 3 is formed by stacking for multiple internode 6.

As in Figure 3-5, described composite material tube 3 is at least three, and adjacent two described composite material tubes 3 are by connector 4 grafting mutually.

Described connector 4 is made for composite material, described connector 4 comprises disk and is arranged on disk up and down and be less than the cylinder of disc radius, described cylindrical radius is identical with described composite material tube 3 internal diameter be connected, described connector 4 is connected with described composite material tube 3 by cementing agent, can not intake after described adhesive glue solidification, good sealing be ensured.

As shown in Figure 2, described internode 6 comprises axial parallel-segment and is symmetricly set on the curved section at parallel-segment two ends, described parallel-segment is tubular structure, described adjacent two described internode 6 places are node 2, described node 2 is bamboo joint structure, an i.e. protruding position, described curved section is seamlessly transit pipe between described parallel-segment and node 2.

Described composite material tube 3 designs according to the principle reducing tower body bulk deformation containing the number of internode 6 and the spacing of each internode 6.Generally, described internode 6 is 3-6, and described intra-node radial direction is provided with dividing plate, and described bulkhead sides is connected with node by cementing agent, can not intake, ensure good sealing after described adhesive glue solidification.

As Figure 7-9, described dividing plate 5 is circular netted lattice aluminium sheet, and described dividing plate 5 upper and lower surface is welded with aluminium sheet.

The length of each described internode 6 length that is equal or each described internode 6 is elongated successively from top to bottom.The thickness of each described composite material tube 3 is identical.

But in order to consider economy, wherein each composite material tube 3 also can form tapered tapered rod with the parts of different-diameter, and can adopt several sections of composite material tubes 3 from bottom to top substantially, diameter reduces successively, and thickness also reduces successively.

As shown in figs. 3 and 6, described composite material tube 3 is stratified fiber structure, and described lamination comprises internal layer, middle level and skin from inside to outside successively; Described internal layer is tubular fiber layer; Described middle level and described skin are bamboo shape layer.

Described internal layer is at least divided into 5 layers of tubular fiber layer from inside to outside, the fiber of described internal layer along tubular fiber layer from the inside to the outside and described tubular fiber layer axially between angle be followed successively by 0 °, 45 °, 90 ° and fiber is laid in 135 ° of directions, and be sequentially laid on each tubular fiber layer according to this angle change;

Angle between the fiber in described middle level and described middle level axis is that 90 ° of directions are laid;

Described outer layer fiber layer is at least 2 layers, described outer field fiber along outer layer fiber layer from the inside to the outside and described outer layer fiber layer axially between angle be followed successively by 0 ° and 90 ° of directions are laid.

In the present embodiment, described internal layer is 5 tubular fiber layers, be internal layer 1 layer-internal layer 5 layers from inside to outside, the fiber of described internal layer 1 layer and described composite material tube 3 axial direction are that 0 ° of angle is laid on internal layer 1 layer, the fiber that internal layer is 2 layers and described composite material tube 3 axial direction are that 45° angle degree is laid on internal layer 2 layers, the fiber that internal layer is 3 layers and described composite material tube 3 axial direction are that 90 ° of angles are laid on internal layer 3 layers, the fiber that internal layer is 4 layers and described composite material tube 3 axial direction are that 135 ° of angles are laid on the fiber of the upper and internal layer 5 layers of internal layer 4 layers and described composite material tube 3 axial direction is that 0 ° of angle is laid on internal layer 5 layers.

In the present embodiment, described skin is 2 fibrages, be outer 1 layer and outer 2 layers from inside to outside, the fiber of described outer 1 layer is that 0 ° of angle is laid on outer 1 layer along the axial direction of described composite material tube, and the fiber of described outer 2 layers be that 90 ° of angles are laid on skin 2 layers along the axial direction of described composite material tube.

Described internal layer mainly plays a supportive role, and can improve the bearing capacity of shaft tower, and described internal layer thickness is at least 40% of described laminated thickness;

The middle level of fibre structure is the primary structure of composition node, can play and increase near nodal tension and compression rigidity, the effect of the strengthening such as bending rigidity mechanical property, and the maximum gauge in described middle level is at least 30% of described laminated thickness;

The outer field stressed of fibre structure is position maximum in total, and skin will play the effect stoping crackle to be expanded from an internode as another one internode, and described outer radial thickness is at least 25% of described laminated thickness.

The middle level laying of fibre structure will meet detailing requiments, and its circumference longitudinal thickness Changing Pattern is, described middle level Nodes fiber thickness is greater than the zone fiber thickness seamlessly transitted of middle level curved section, and described fiber thickness is changed by the number of turns of Filament-wound Machine.

Top and the bottom of described composite bar 1 are all sealed by fluid sealant, can not intake, ensure good sealing after sealing glue solidifying.

As shown in Figure 1, the bottom of described composite bar 1 is embedded in underground, and the computational methods of the buried length in bottom of described composite bar 1 are:

H ₀=0.06H+h， （1-1）

Wherein H ₀for the length of buried depth, H is the length of whole electric wire mobile jib, and h is a constant, and h generally value is 1.2.

Bonding chassis 15 bottom described composite bar 1, chassis 15 described in the present embodiment is flange.

Described composite material tube 3 adopts the method for variable cross-section pultrusion to make, and is the variable cross-section composite material tube of pultrusion.

The earth wire support 7 of described transmission tower is connected with described composite bar 1 top by sleeve and earth wire support anchor ear 8, described cross-arm comprises cross-arm 19 and lower cross-arm 17, one end of described upper cross-arm 19 is connected with described composite bar 1 by sleeve and top rail anchor ear (b) 9, the other end of described upper cross-arm 19 is connected with one end of upper cross-arm suspension rod 20, and the other end of described upper cross-arm suspension rod 20 is connected with described composite bar 1 by the described sleeve above described upper cross-arm 19 and top rail anchor ear (b) 21;

Namely the centre of described lower cross-arm 17 descends cross-arm anchor ear (a) 16 to be connected with described composite bar 1 by sleeve, the two ends of described lower cross-arm 17 are connected with described composite bar 1 respectively by two lower cross-arm suspension rods 10, and two described lower cross-arm suspension rods 10 are connected with described composite bar 1 with lower cross-arm anchor ear (b) 18 above described lower cross-arm 17 respectively by top rail anchor ear (b) 21; Described sleeve and anchor ear are bolted on described composite bar 1.

Described transmission tower both can be angle tower also can be tangent tower, be connected by bracing wire 11 with ground described lower cross-arm anchor ear (a) 16, wedge clamp 12 and lower wedge clamp 13 is respectively equipped with above and below described bracing wire 11, described bracing wire 11 bottom is provided with cable quadrant 14, described bracing wire 11 pairs of ground angles are less than 60 degree, and cable quadrant 14 buried depth is not less than 0.6m.

The composite material of described transmission tower comprises fiber and strengthens resin, and described fiber adopts the fiber of high-modulus, and described enhancing resin adopts heat-resisting, ageing-resistant, the resin material that insulating properties is strong.

The bionical shape composite material transmission tower of ring, because this transmission tower has the profile of bamboo, the tower body color of shaft tower can be changed, the overall appearance of this transmission tower is coordinated mutually with natural environment, in its manufacturing process, with the addition of coloring agent relevant to green, make shaping after the overall color of ring bionical shape composite material transmission tower the same with natural bamboo.

As shown in figure 11, the bionical shape composite material transmission tower of the ring in the present invention, the rotational stiffness computational methods of its internode are as follows:

When internode two ends respectively act on a unit bending moment, the corner displacement at internode two ends:

$\mathrm{\θ}={\∫}_0^l\frac{1}{{\mathrm{EI}}_x}\mathrm{dx}={\∫}_0^{\mathrm{ml}}\frac{1}{{\mathrm{EI}}_x}\mathrm{dx}+{\∫}_{\mathrm{ml}}^{(1-n)l}\frac{1}{\mathrm{EI}}\mathrm{dx}+{\∫}_{(1-n)l}^l\frac{1}{{\mathrm{EI}}_x}\mathrm{dx}---\left(1\right)$

Wherein: as 0<x<ml:

The bending rigidity at bionical internode point place is $I_x=\frac{\mathrm{\&pi;}[{(C-{\mathrm{ax}}^2)}^4-d^4]}{64}---\left(2\right)$

As ml<x< (1-n) l:

$I_x=\frac{\mathrm{\&pi;}(D^4-d^4)}{64}---\left(3\right)$

As (1-ml) <x<l:

$I_x=\frac{\mathrm{\&pi;}[{(D+{\mathrm{ax}}^2)}^4-d^4]}{64}---\left(4\right)$

Wherein: x is the position in research object bamboo shape tower body cross section, l is panel length, ml is one of them curved section length and nl is another curved section length, D and d be respectively tubing in ml<x< (1-n) l section external diameter and internal diameter, E is the modulus of elasticity of composite material; Y=C-ax ²for describing the quadratic function of ring curved section, I is bionical internode bending rigidity;

θ is less, and the bending resistance of rod member is stronger.Obvious: according to formula (1)-(4), the dynamic moment of inertia in ring is greater than the dynamic moment of inertia of remainder, therefore, the bending resistance that bamboo joint type composite material tube can increase rod member is conducive to the amount of deflection reducing power transmission tower.

The composite material tube of the bionical shape composite material pole tower of ring, the stretching/compressing calculating method of stiffness of its internode is as follows:

When internode two ends respectively act on a unit force, the corner displacement at internode two ends:

$\mathrm{\&Delta;}={\&Integral;}_0^l\frac{1}{{\mathrm{EA}}_x}\mathrm{dx}={\&Integral;}_0^{\mathrm{ml}}\frac{1}{{\mathrm{EA}}_x}\mathrm{dx}+{\&Integral;}_{\mathrm{ml}}^{(1-n)l}\frac{1}{\mathrm{EA}}\mathrm{dx}+{\&Integral;}_{(1-n)l}^l\frac{1}{{\mathrm{EA}}_x}\mathrm{dx}---\left(5\right)$

Wherein: as 0<x<ml:

A _x=π[(c-ax ²)-d ²]/4 （6）

As ml<x< (1-n) l:

A _x=πd ²/4 （7）

As (1-ml) <x<l:

A _x=π[(d+ax ²)-d ²]/4 （8）

Wherein x is the position in research object bamboo shape tower body cross section, l is panel length, ml is one of them curved section length and nl is another curved section length, D and d be respectively tubing in ml<x< (1-n) l section external diameter and internal diameter, E is the modulus of elasticity of composite material; Y=C-ax ²for describing the quadratic function of ring curved section, A is the parallel-segment cross sectional area of composite material tube.

△ is less, and the axis of rod member draws/press rigidity larger.Obvious: according to formula (5)-(8), the area in ring is greater than the area of remainder, therefore, the axial rigidity of rod member increases.

In sum, bamboo joint type composite material tube can increase the area of rod member and rotate modulus, and then increases its axial tension/pressure rigidity, and rotational stiffness.Therefore, this rod member is conducive to the amount of deflection reducing power transmission tower.

The modulus of elasticity of composite material is less, in order to improve the integral rigidity of shaft tower as far as possible, and then reducing amount of deflection, needing power transmission tower cross section to have larger moment of inertia when area is constant.Like this, the impact of shear strain on structure is very important.Therefore, need to check the impact of its shear stiffness on total slenderness ratio.

According to elastic stability theory, if consider the impact of shear strain, the Calculation on Critical Force formula of shaft tower is:

$N_{\mathrm{cr}}=\frac{{\mathrm{\&pi;}}^2\mathrm{EI}}{l^2}\frac{1}{1+\frac{{\mathrm{\&pi;}}^2\mathrm{EI}}{l^2}\mathrm{\&gamma;}}=\frac{{\mathrm{\&pi;}}^2\mathrm{EA}}{{\mathrm{\&lambda;}}^2}\frac{1}{1+\frac{{\mathrm{\&pi;}}^2\mathrm{EA}}{{\mathrm{\&lambda;}}^2}\mathrm{\&gamma;}}=\frac{{\mathrm{\&pi;}}^2\mathrm{EA}}{{\mathrm{\&gamma;}}_0^2}---\left(9\right)$

Wherein: ${\mathrm{\&lambda;}}_0=\sqrt{{\mathrm{\&lambda;}}^2+{\mathrm{\&pi;}}^2\mathrm{EA}{\mathrm{\&gamma;}}_1}---\left(10\right)$

${\mathrm{\&gamma;}}_1=\frac{l_1^3}{12\mathrm{EI}}---\left(11\right)$

I is bionical internode bending rigidity;

γ ₁it is the shear stiffness of two composite material tubes every between face;

L is the total length of composite bar;

γ is the shear stiffness in composite bar cross section;

λ ₀the equivalent slenderness ratio of composite bar after increase dividing plate;

λ is the equivalent slenderness ratio of non-inductive windings composite bar;

L ₁for the distance between dividing plate;

The modulus of elasticity of E composite material;

The cross sectional area of A composite material tube parallel-segment;

When load is known, according to λ ₀the spacing in tabula face can be determined.

According to the principle of virtual work, under specific loading, the amount of deflection of application point place tower is:

${\mathrm{\&Delta;}}_1={\&Integral;}_0^L\frac{{F_y}^2}{{\mathrm{EA}}_y}\mathrm{dy}+{\&Integral;}_0^L\frac{{M_y}^2}{{\mathrm{EI}}_y}\mathrm{dy}+{\&Integral;}_0^L\frac{{{\mathrm{kQ}}_y}^2}{{\mathrm{GA}}_y}\mathrm{dy}$

When load F determines, its amount of deflection is:

△=F△ ₁

Wherein: F _y, M _y, and Q _ybe respectively sectional axis power, section turn moment and the section shear of shaft tower under unit force effect; A _yand I _ybe respectively area and the moment of inertia in composite material tube curved section cross section, due to the existence of ring, they are all functions of cross-section centroid coordinate y along its length; G and k is respectively the shearing modulus of material and the shearing nonuniformity coefficient in cross section; The modulus of elasticity of E composite material; △ is the true amount of deflection of rod member; The real load of F power transmission tower.

△ is less, and the integral rigidity of rod member is larger.Obvious: the dynamic moment of inertia in ring and area are all greater than remainder, therefore, bamboo joint type composite material tube can increase the bending resistance of rod member, resistance to compression and shear resistance, is conducive to the amount of deflection reducing power transmission tower.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of this right.

Claims (15)

1. the bionical shape composite material transmission tower of ring, this shaft tower is applicable in below 110KV transmission line of electricity, described shaft tower comprises the tower body and transverse member that are vertically connected to one another, described transverse member comprises the cross-arm below the earth wire support on tower body top and described earth wire support, it is characterized in that: described tower body is bamboo shape, described tower body is formed by stacking by bamboo shape composite material tube.

2. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 1, is characterized in that: described composite material tube is at least three, and adjacent two described composite material tubes are by the mutual grafting of connector.

3. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 2, it is characterized in that: described connector is that composite material is made, described connector comprises disk and is arranged on the upper and lower cylinder of disk, described cylindrical radius is identical with the described composite material bore be connected, and described connector is connected with described composite material tube by cementing agent.

4. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 1, it is characterized in that: described composite material tube is formed by stacking by internode, described internode comprises axial parallel-segment and is symmetricly set on the curved section at parallel-segment two ends, adjacent two described internode places are node, and described node is bamboo joint structure.

5. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 4, is characterized in that: described internode is 3-6, and described intra-node radial direction is provided with dividing plate.

6. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 5, is characterized in that: described dividing plate for circular netted lattice aluminium sheet, described dividing plate upper and lower surface is welded with aluminium sheet.

7. the bionical shape composite material transmission tower of a kind of ring as described in claim 1-4 any one, is characterized in that: described composite material tube is laminated construction, and described lamination comprises internal layer, middle level and skin from inside to outside successively; Described internal layer is tubular fiber layer; Described middle level and described skin are bamboo shape fibrage.

8. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 7, it is characterized in that: described internal layer is at least divided into 5 layers of tubular fiber layer from inside to outside, the fiber of described internal layer along tubular fiber layer from the inside to the outside successively and its axially between angle be that the angle of 0 °, 45 °, 90 ° and 135 ° is laid and lays by this angular circulation;

Angle between the fiber in described middle level and described middle level axis is that 90 ° of directions spread;

Described outer layer fiber layer is at least 2 layers, described outer field fiber along outer layer fiber layer from the inside to the outside and its axially between angle be that the angle of 0 ° and 90 ° is laid fiber and lays according to this angular circulation.

9. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 8, it is characterized in that: described internal layer is 5 layers of tubular fiber layer, the fiber of described internal layer along tubular fiber layer from the inside to the outside and its axially between the angle angle that is followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angular circulation;

Described outer layer fiber layer is at least 2 layers, described outer field fiber along outer layer fiber layer from the inside to the outside and its axially between angle be that the angle of 0 ° and 90 ° is laid.

10. the bionical shape composite material transmission tower of a kind of ring as claimed in claim 9, is characterized in that: described internal layer thickness is at least 40% of described laminated thickness; The maximum thickness in described middle level is at least 30% of described laminated thickness; Described outer layer thickness is at least 25% of described laminated thickness.

The bionical shape composite material transmission tower of 11. a kind of ring as claimed in claim 10, is characterized in that: the Nodes fiber thickness in described middle level is greater than the zone fiber thickness of the curved section in middle level, and described fiber thickness is changed by the number of turns of Filament-wound Machine.

The bionical shape composite material transmission tower of 12. a kind of ring as claimed in claim 1, is characterized in that: top and the bottom of described composite material tube are all sealed by fluid sealant.

The bionical shape composite material transmission tower of 13. a kind of ring as claimed in claim 1, is characterized in that: the method that described composite material tube adopts pultrude process to make varying cross-section duct makes.

The bionical shape composite material transmission tower of 14. a kind of ring as claimed in claim 1, it is characterized in that: described composite material tube is that composite material is made, described composite material comprises fiber and strengthens resin, described fiber adopts the fiber of high-modulus, described enhancing resin adopts heat-resisting, ageing-resistant, the resin material that insulating properties is strong.

The bionical shape composite material transmission tower of 15. a kind of ring as claimed in claim 14, is characterized in that: described composite material tube with the addition of green coloring agent in manufacturing process.