CN203559612U - Composite material power transmission tower - Google Patents

Abstract

The utility model relates to a composite material power transmission tower, suitable for power transmission lines below 110 kilovolt. The tower comprises a tower body and transverse members which are vertically connected. The transverse members comprise a ground wire support at the top end of the tower body and a cross arm below the ground wire support; the characteristic is that the tower body is superposed through composite material pipes. The tower body is of a bamboo shape, which can improve tensile strength/ crush resistance, flexural rigidity and rotational stiffness of the tower body, effectively minimize the influence to the tower caused by windage yaw and icing and enhance the stability of the tower in severe weather; the composite material power transmission tower can be used for regions with severe corrosion, has the advantage of low cost construction, transportation, installation and maintenance and can reduce line corridors.

Description

A kind of composite material transmission tower

Technical field:

The utility model relates to work transmission line, more specifically relates 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 framework is not optimal shaft tower material.Concrete frame quality is heavier than steel, thereby causes transportation and difficulty is installed, and easily affected by environment.And composite material pole tower is due to its good combination property, the feature such as high in intensity, lightweight, corrosion-resistant, good insulating, has progressively obtained application.

Composite material progressively replaces timber and metal alloy at present, is widely used in the fields such as Aero-Space, automobile, electric, building, body-building apparatus, has obtained especially develop rapidly in recent years.Along with scientific and technological development, resin and glass fiber are constantly progressive 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 further expanded the range of application of composite material in electrical network.

The composite material that shaft tower is used is mainly selected glass fiber reinforced plastics composite material, and fortifying fibre is selected glass fiber conventionally, and resin is selected aathermoset resin system.Main feature comprises: (1) high-strength light, more than stretching, bending and compressive strength all can reach 400Mpa, density is generally less than 2.2g/cm ³; Therefore can reduce transportation and the difficulty of construction of shaft tower, improve the construction efficiency of electrical network, particularly in the application of transporting the area in hardship.(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; Can reduce extent of corrosion coastal and heavy industrial area shaft tower, extend shaft tower application life, reduce shaft tower maintenance cost.(3) composite material pole tower has good insulating properties, at 110KV and above circuit, can effectively reduce circuit width of corridor (maximum compressible more than 30%), reduce windage yaw accident, economize the land resource, reduce transmission line of electricity entirety operation maintenance cost.

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 tensile strength 40～50%, but some composite material can be up to 70～80%.The fatigue fracture of composite material is from matrix, expands to gradually on the interface of fiber and matrix, there is no paroxysmal variation.Therefore, composite material has omen before destruction, can check and remedy.The Some features of composite material is suitable for tower structure very much, 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, can also effectively alleviate metal or the concrete shaft tower difficulty in construction transportation and operation maintenance.In recent years, along with the further reduction of domestic composite material cost, the continuous progress of composite material manufacture craft, research and the application conditions of composite material pole tower possess, and the technological reserve that realizes complex pole tower has important practical significance to operation of power networks.

Composite material pole tower is applied in global some areas, wherein develops and applies the relative ripe companies such as RS and Strongwell that have.The composite material pole tower of RS company exploitation comes into operation in European and American areas.For example about 300 base door shape composite material pole towers have been installed in 230kV transmission system by Canadian big lake Utilities Electric Co., also have in addition 90 base complex pole towers just in other electric pressure transmission system, to come into operation.In Norway, the 132kV transmission line of electricity of long 50 kilometers is by the door shape composite material pole tower that uses 170 base RS companies to produce.Because composite material modulus is little, composite material single pole is out of shape larger when stressed, adopts the composite material pole tower of door shape can effectively reduce distortion, and in composite material pole tower process under arms also by cracking, and crackle is expanded with machine direction.The ring biomimetic features that transmission tower of the present utility model adopts can reduce the distortion of composite material single pole, and can utilize node to stop crackle to be expanded along machine direction.

Utility model content:

The purpose of this utility model is to provide the bionical shape composite material transmission tower of a kind of ring, and this shaft tower is applicable in the following transmission line of electricity of 110KV.The bionical shape composite material transmission tower of ring in the utility model can increase tension/pressure rigidity of shaft tower tower body, bending rigidity and rotational stiffness, can effectively reduce windage yaw, the impact of icing on shaft tower, can increase the stability of shaft tower under bad weather, can be used for seriously corroded area, and have that cost is lower, transportation, installation, maintenance expense be less, reduces the advantage in circuit corridor.

For achieving the above object, the utility model is by the following technical solutions: the bionical shape composite material transmission tower of a kind of ring, this shaft tower is applicable in the following transmission line of electricity of 110KV, described shaft tower comprises the tower body and the transverse member that are vertically connected to one another, described transverse member comprises the earth wire support on tower body top and the cross-arm of described earth wire support below, 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 that the utility model provides, described composite material tube is at least three, and adjacent two described composite material tubes are pegged graft mutually by connector.

The bionical shape composite material transmission tower of a kind of ring that the utility model provides, the material of described connector is composite material, 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 being 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 that the utility model provides, described composite material tube is formed by stacking by internode, described internode comprises axially parallel section 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 again that the utility model provides, is characterized in that: described internode is 3-6, and described intra-node is radially provided with dividing plate.

The bionical shape composite material transmission tower of another preferred a kind of ring that the utility model provides, 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 that the utility model provides, described composite material tube is laminated construction, 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 that the utility model provides,

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 angle between axially angle of being followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angle circulation;

Angle between the fiber in described middle level and described middle level are axial 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 angle between be axially that the angle of 0 ° and 90 ° is laid fiber and according to this angle circulation laying.

The bionical shape composite material transmission tower of another preferred a kind of ring that the utility model provides,

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 angle between axially angle of being followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angle 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 angle between be axially the angle laying of 0 ° and 90 °.

The bionical shape composite material transmission tower of another preferred a kind of ring that the utility model provides, described internal layer thickness is at least 40% of described laminated thickness; The thickness of described middle level maximum 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 that the utility model provides, the Nodes fiber thickness in described middle level is greater than the region 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 that the utility model provides, is characterized in that: top and the bottom of described composite material tube all seal by fluid sealant.

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

The bionical shape composite material transmission tower of another preferred a kind of ring that the utility model provides, described composite material also comprises green coloring agent.

Owing to having adopted technique scheme, the beneficial effect that the utility model obtains is:

1, in the utility model, transmission tower, by arranging the bionical node of ring, increases tension/pressure rigidity of tower body, and bending rigidity and rotational stiffness reduce the distortion of tower entirety; Can effectively prevent that composite material pole tower is because Crack Extension causes shaft tower bearing capacity fast-descending, there is no omen and the danger of directly collapsing;

2, transmission tower good looking appearance in the utility model, can merge mutually with the Nature;

3, the utility model for power transmission and transformation line has designed a kind of scientific structure, bearing capacity is reasonable, the bionical shape composite material pole tower of ring of coordinating mutually with natural environment;

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

6, in the utility model, the outer field stressed of the fibre structure of transmission tower is position maximum in total, and skin will play the effect that stops 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 utility model;

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

Fig. 3 is the assembling schematic diagram between the utility model composite material tube;

Fig. 4 is the front view of the utility model composite material pipe connections;

Fig. 5 is the top view of the utility model composite material pipe connections;

Fig. 6 is the utility model transmission tower fibre structure schematic diagram;

Fig. 7 is the sectional drawing of the utility model composite separator;

Fig. 8 is the inner cancelled structure schematic diagram of the utility model composite separator;

Fig. 9 is the overall diagram of the utility model composite separator;

Figure 10 is the stressed schematic diagram of the utility model transmission tower;

Figure 11 is the Rigidity Calculation parameter schematic diagram of the utility model transmission tower;

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, the upper cross-arm anchor ear of 9-(a), 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-, the upper cross-arm anchor ear of 21-(b).

The specific embodiment

Below in conjunction with embodiment, utility model is described in further detail.

Embodiment 1:

As shown in Figure 1, this routine transmission tower is for the electric line below 110KV, described transmission tower comprises the tower body and the transverse member that are vertically connected to one another, described transverse member comprises earth wire support 7 that top radially arranges and the cross-arm of described earth wire support 7 belows, 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 tubes 3, and described composite material tube 3 is formed by stacking for multiple internodes 6.

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

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 diameters that are connected, described connector 4 is connected with described composite material tube 3 by cementing agent, described adhesive glue can not be intake after solidifying, and guarantee good sealing.

As shown in Figure 2, described internode 6 comprises axially parallel section 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 the pipe that seamlessly transits between described parallel-segment and node 2.

The number that described composite material tube 3 contains internode 6 and the spacing of each internode 6 are according to the principle design that reduces tower body bulk deformation.Generally, described internode 6 is 3-6, and described intra-node is radially provided with dividing plate, and described bulkhead sides is connected with node by cementing agent, and described adhesive glue can not be intake after solidifying, and guarantee good sealing.

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

The length of equal in length or each described internode 6 of 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, can adopt substantially several sections of composite material tubes 3 from bottom to top, and diameter reduces successively, and thickness also reduces successively.

As shown in Fig. 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 the angle of described tubular fiber layer between be axially followed successively by 0 °, 45 °, 90 ° and 135 ° of directions and lay fibers, and be laid on each tubular fiber layer according to this angle variation order;

Angle between the fiber in described middle level and described middle level are axial 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 the angle of described outer layer fiber layer between be axially followed successively by 0 ° and 90 ° of directions layings.

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

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 the tension and compression rigidity of node, and the effect of the strengthening such as bending rigidity mechanical property, the maximum ga(u)ge in described middle level is at least 30% of described laminated thickness;

Fibre structure outer field stressed is position maximum in total, and outer will playing stop crackle effect as the expansion of another one internode from an internode, and described outer radial thickness is at least 25% of described laminated thickness.

The middle level laying of fibre structure will meet structure requirement, and its circumference longitudinal thickness Changing Pattern is, described middle level Nodes fiber thickness is greater than the region fiber thickness seamlessly transitting of middle level curved section, and described fiber thickness changes by the number of turns of Filament-wound Machine.

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

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.

Described composite bar 1 bonding chassis 15, bottom, 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 that earth wire support anchor ear 8 is connected with described composite bar 1 top by sleeve, described cross-arm comprises cross-arm 19 and lower cross-arm 17, one end of described upper cross-arm 19 is that top rail anchor ear (b) 9 is connected with described composite bar 1 by sleeve, 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 that top rail anchor ear (b) 21 is connected with described composite bar 1 by the described sleeve of described upper cross-arm 19 tops;

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 by two lower cross-arm suspension rods 10 respectively, and two described lower cross-arm suspension rods 10 are connected with described composite bar 1 by the lower cross-arm anchor ear (b) 18 of top rail anchor ear (b) 21 and described lower cross-arm 17 tops respectively; Described sleeve is that anchor ear is bolted on described composite bar 1.

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

The composite material of described transmission tower comprises fiber and strengthens resin, the fiber of described fiber employing 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, can change the tower body color of shaft tower, the overall appearance of this transmission tower is coordinated mutually with natural environment, in its manufacturing process, added coloring agent relevant to green, made the overall color of the bionical shape composite material transmission tower of ring after moulding the same with natural bamboo.

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

When a unit bending moment of the each effect in internode two ends, 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: when 0 < x < ml:

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

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

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

When (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 that one of them curved section length and nl are another curved section length, D and d be respectively tubing in ml < x < (1-n) l section external diameter and internal diameter, the modulus of elasticity that E is 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 reduce the amount of deflection of 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 a unit force of the each effect in internode two ends, 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: when 0 < x < ml:

A _x＝π[(c-ax ²)-d ²]/4 （6）

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

A _x＝πd ²/4 （7）

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

Δ is less, rod member axially draw/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 reduce the amount of deflection of power transmission tower.

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

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

$N_{\mathrm{cr}}=\frac{{\mathrm{\&pi;}}^2\mathrm{<figure-callout\; id="2"\; label="EI\; l"\; filenames="HDA00003465276500011.png"\; state="\{\{state\}\}">EI</figure-callout>}}{l^{}}\frac{1}{1+\frac{{\mathrm{\&pi;}}^2\mathrm{<figure-callout\; id="2"\; label="EI\; l"\; filenames="HDA00003465276500011.png"\; state="\{\{state\}\}">EI</figure-callout>}}{l^{}}\mathrm{\&gamma;}}=\frac{{\mathrm{\&pi;}}^1\mathrm{EA}}{{\mathrm{\&lambda;}}^2}\frac{1}{1+\frac{{\mathrm{\&pi;}}^2\mathrm{EA}}{{\mathrm{\&lambda;}}^2}\mathrm{\&gamma;}}=\frac{{\mathrm{\&pi;}}^2\mathrm{EA}}{{\mathrm{\&lambda;}}_0^2}---\left(9\right)$

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

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

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 without dividing plate 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;

In the situation that load is known, according to λ ₀can determine the spacing of tabula face.

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

${\mathrm{\&Delta;}}_1={\&Integral;}_0^{\mathrm{<figure-callout\; id="2"\; label="L\; F\; y"\; filenames="HDA00003465276500011.png"\; state="\{\{state\}\}">L</figure-callout>}}\frac{{F_y}^{}}{}\frac{{{}_{}}^2}{{\mathrm{EA}}_y}\mathrm{dy}+{\&Integral;}_0^{\mathrm{<figure-callout\; id="2"\; label="L\; M\; y"\; filenames="HDA00003465276500011.png"\; state="\{\{state\}\}">L</figure-callout>}}\frac{{M_y}^{}}{}\frac{{{}_{}}^2}{{\mathrm{EI}}_y}\mathrm{dy}+{\&Integral;}_0^{\mathrm{<figure-callout\; id="2"\; label="L\; kQ\; y"\; filenames="HDA00003465276500011.png"\; state="\{\{state\}\}">L</figure-callout>}}\frac{{{\mathrm{kQ}}_y}^{}}{}\frac{{{}_{}}^2}{{\mathrm{GA}}_y}\mathrm{dy}$

In the situation that load F is definite, its amount of deflection is:

Δ＝FΔ ₁

Wherein: F _y, M _y, and Q _ybe respectively sectional axis power, cross section moment of flexure 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 centre of form coordinate y along its length; G and k are respectively the shearing modulus of material and the shearing nonuniformity coefficient in cross section; The modulus of elasticity of E composite material; Δ is the true amount of deflection of rod member; The real load of F power transmission tower.

Δ 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 bending resistance, resistance to compression and the shear resistance of rod member, is conducive to reduce the amount of deflection of power transmission tower.

Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of this claim scope.

Claims (14)

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

2. a kind of composite material transmission tower 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 pegged graft mutually by connector.

3. a kind of composite material transmission tower as claimed in claim 2, it is characterized in that: described connector material is composite material, 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 being connected, and described connector is connected with described composite material tube by cementing agent.

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

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

6. a kind of composite material transmission tower as claimed in claim 5, is characterized in that: described dividing plate is the circular slab being comprised of grid, and described circular slab upper and lower surface is welded with aluminium sheet.

7. a kind of composite material transmission tower as described in claim 1-4 any one, is characterized in that: described composite material tube is laminated construction, 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. a kind of composite material transmission tower 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 angle between be axially that the angle of 0 °, 45 °, 90 ° and 135 ° is laid and laid by this angle circulation;

Angle between the fiber in described middle level and described middle level are axial is 90 ° of directions pavings;

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 angle between be axially that the angle of 0 ° and 90 ° is laid fiber and according to this angle circulation laying.

9. a kind of composite material transmission tower 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 angle between axially angle of being followed successively by 0 °, 45 °, 90 ° and 135 ° lay fiber and lay by this angle 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 angle between be axially the angle laying of 0 ° and 90 °.

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

11. a kind of composite material transmission towers as claimed in claim 10, is characterized in that: the Nodes fiber thickness in described middle level is greater than the region fiber thickness of the curved section in middle level, and described fiber thickness changes by the number of turns of Filament-wound Machine.

12. a kind of composite material transmission towers as claimed in claim 1, is characterized in that: top and the bottom of described composite material tube all seal by fluid sealant.

13. a kind of composite material transmission towers as claimed in claim 1, is characterized in that: described composite material tube material is composite material, and described composite material comprises fiber and strengthens resin, the fiber of described fiber employing high-modulus.

14. a kind of composite material transmission towers as claimed in claim 13, is characterized in that: described composite material also comprises green coloring agent.

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