CN102134931A - Fiberglass reinforced plastic telegraph pole - Google Patents
Fiberglass reinforced plastic telegraph pole Download PDFInfo
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- CN102134931A CN102134931A CN2011100924260A CN201110092426A CN102134931A CN 102134931 A CN102134931 A CN 102134931A CN 2011100924260 A CN2011100924260 A CN 2011100924260A CN 201110092426 A CN201110092426 A CN 201110092426A CN 102134931 A CN102134931 A CN 102134931A
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Abstract
The invention provides a fiberglass reinforced plastic telegraph pole. The telegraph pole comprises a pole body, a cross arm, lead wire seats, hardware fittings, a clamp, an end cap and a sleeve, wherein the cross arm is arranged on the upper part of the pole body through the clamp; the end cap is arranged on the top end of the pole body; three lead wire seats and the hardware fittings are fixed at two ends of the cross arm and the end cap respectively through bolts; the sleeve is sleeved on the lower part of the pole body; lead wires are fixed between the lead wire seats and the hardware fittings; the pole body is of a hollow conical structure with a uniformly thickened wall, wall thickness variation delta is between 0.15 and 0.2 percent, the wall thickness variation dmax is the maximum wall thickness of the pole body, namely the wall thickness of the lowest end of the pole body, the wall thickness variation dmin is the minimum wall thickness of the pole body, namely the wall thickness of the top end of the pole body, and l is the bus length of the pole body. By adopting the design with a special variable thickness pole body structure, the materials play the best carrying function, and the manufacture cost is reduced; and in the pole body, the fiberglass reinforced plastic flange at the root of the pole body is integrally molded by adopting a winding method, while the telegraph pole is convenient to assemble with the ground, the mechanical performance requirement is met; and the pole body, the cross arm and the lead wire seats are produced by adopting different materials and molding processes, the designable performance, weight reduction and other function requirements are met while corrosion resistance and electric insulation of the telegraph pole are fulfilled.
Description
Technical field
The present invention relates to a kind of electric pole, particularly relate to a kind of glass fiber reinforced plastic electric pole, belong to composite material and electric pole manufacturing technology field.
Background technology
Using comparatively widely in the present domestic overhead transmission line, shaft tower mainly contains concrete frame, steel pipe pole, concrete filled steel tube bar, lattice iron tower etc., defectives such as traditional transmission tower ubiquity quality is heavy, perishable, corrosion or cracking, various potential safety hazards appear in construction transportation and operation maintenance difficulty easily.
The galss fiber reinforced resin based composites has characteristics such as intensity height, light weight, corrosion-resistant, fatigue performance, endurance quality and electrical insulation capability be good, is very suitable for making transmission tower.The main purpose that present stage is carried out composite material pole tower research has:
(1) utilize the insulating properties of composite material excellence to dwindle the transmission line of electricity width, save floor occupying area, this is particularly important in the city.
(2) utilize the decay resistance of composite material excellence to solve the transmission tower safety and the life problems in seriously corroded areas such as coastal, salt-soda soil.
Along with electric power is carried novel tower structure growth of requirement, polymer matrix composites will be widely used in the overhead transmission line line pole tower gradually.
As traditional material timber, steel and concrete substitute, external composite material bar is being used on the electric power transmission tower above 30 years as light weight beam.It has lot of advantages, as high strength ratio, and corrosion resistance, UV resistant, characteristics such as endurance quality and electrical insulation capability are good, at high mountain with swamp land is convenient installs, maintenance and freight are low.Economize the big area, mountain area of snowpack as Meng Nada, transport very inconvenience, adopt FRP transmission of electricity bar (because of its light weight and easily installation) to alleviate the operation easier of installation personnel greatly, obtained good effect in the U.S..
At present external on transmission tower the application form of polymer matrix composites mainly contain two kinds of variable cross-section single pole and straight tube assembling pylons.All be fiber reinforced material generally, use polyester, vinyl esters or epoxy resin are made base material, and E-glass, S-glass, aromatic polyamides and carbon fiber are used as reinforcing material.What general great majority adopted is the moulding of fiber winding technology.D.Polyzois etc. adopt fiber winding technology formed glass fiber reinforcement vinyl ester resin based composites hollow taper bar, and utilize finite element analysis that the dynamic behaviour of composite material bar is studied; Sherbrooke university adopts fiber winding technology formed glass fibre reinforced epoxy resin composite bar, and the crooked behavior of bar is studied; Ioannis.G etc. have carried out certain research to the dynamic behaviour of the fibre-glass reinforced polyester composite material hollow taper bar of fiber winding forming; Southern California Edison Utilities Electric Co. uses high-strength glass fibre and polyurethane resin to make composite material electric pole, and performance assessed, the Committee of Experts thinks that the composite material bar is expected to significantly reduce the maintenance of bar, do not need frequent replacing, these improvement have reduced maintenance cost; Employing FEM (finite element) model such as Desai have been studied the bending features of composite material bar, and experimental result shows, the supporting capacity of carbon fiber reinforced coupled pole approximately is 1.75 times of supporting capacity of the coupled pole that strengthens of glass fiber; The university that U.S. Meng Nada economizes designs a kind of composite material bar, it mainly is a vinyl ester resin based composites of selecting for use the E-glass fiber to strengthen, and select the fiber winding technology for use, the cross section of composite material bar is a thin wall type, the traditional bar of its mass ratio is light, and they have analyzed the size of cross-sectional area and have strengthened effect.
The durability of composite material electric pole has been carried out certain research abroad.People such as Yokobori link together the fatigue life of FRP with the mechanism of destroying accumulation, experiment adopts short fiber polycarbafil composite material as experiment material, employing time method for testing fatigue, relation between research fatigue life and the destruction accumulation, experimental result shows, come from the fatigue life of this material and destroy accumulation, these destroy the fracture that inner base and fiber are depended in accumulation, and this fracture is controlled by the time cycle; People such as Suzanne have carried out infrared spectrum analysis to the fatigue fracture of transmission of electricity bar; Zhenyu Ouyang etc. has studied the non-linear reduction pattern of the linkage interface energy of rupture of FRP junction in wet environment, they have pointed out that humidity reduces the active strength of FRP, the energy of rupture that has reduced, cause the failure mode of the cohesive strength inefficacy that material internal destroys, border relative humidity, scantling size, the diffusion of material, the size of method of testing, the surfacing of the material energy of rupture in can both the appreciable impact durability experiment; Detroit Edison Co. points out that the resonance that wind-force produces will cause the fatigue failure of transmission of electricity bar, and in the monsoon zone, this destruction occurs in the junction of semi girder and bar main part.
People such as Canadian Bell adopt centrifugal manufacturing technology successfully to prepare the hollow glass steel pole of taper, experimental result shows under identical condition, the GFRP bar has identical lateral bearing ability with wooden stick, and has pointed out that further the GFRP bar has certain elasticity when deflecting.
Polyzois has carried out certain test to the GFRP bar, and experimental result shows that the GFRP bar adopts cantilever beam structures, and three kinds of different failure modes are arranged.Failure mode one is that near the padlock interlayer lost efficacy, and failure mode two is inefficacies that maximum shear stress causes, the inefficacy that the tension force of maximum cross section caused when failure mode three was installation.
California, USA university inlays link technique to the integral body of composite material and has done certain research.In 300 kilovolts of high voltage power transmission tower designs of full composite material, develop CIF (integral body is inlayed link technique), be installed in the transmission of electricity factory of California downstate.
Composite material electric pole has been obtained good development abroad, and raw material and production technology have obtained continuous improvement, and structural performance also is greatly improved, and has obtained certain effect in a lot of regional application.But at home, composite material electric pole is in the starting stage, and its development also needs to strengthen research and development strength, in the hope of better application in transmission line of electricity.
From the domestic and foreign literature consulted and patent etc. as can be seen, both at home and abroad all be that mechanical calculation, moulding process, failure analysis etc. to the composite material electric pole body of rod are made introduction, do not find relevant report as yet for the structure of each component such as body of rod concrete structure, cross-arm, lead card and each connector, mechanical analysis, moulding process etc.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of by structure design and force analysis, adopt the galss fiber reinforced resin based composites to make the electric pole body of rod, cross-arm, lead seat, with each connector of metal material processing, the glass fiber reinforced plastic electric pole that assembling makes, wire pole structure intensity, rigidity all satisfy instructions for use, insulating properties is good, light weight, corrosion-resistant, anti-aging.
Technical solution of the present invention is: a kind of glass fiber reinforced plastic electric pole, comprise the body of rod, cross-arm, lead seat, gold utensil, clip, end cap and sleeve, cross-arm is installed in the top of the body of rod by clip, end cap is installed on body of rod top, three cover lead seats and gold utensil are screwed respectively on the two ends and end cap of cross-arm, the bottom cover of the body of rod is sleeved, fixing cord between lead seat and the gold utensil, the described body of rod is the hollow cone shape structure that evenly becomes wall thickness, wall thickness change rate δ is 0.15%～0.2%, wherein the wall thickness change rate
d
MaxFor the thickest of the body of rod is a body of rod wall thickness bottom, d
MinFor the minimum wall thickness (MINI W.) of the body of rod is a body of rod wall thickness topmost, l is the bus length of the body of rod.
The cross section of described cross-arm adopts the uniform section form, adopts glass fiber and vinyl ester resin pultrusion.
The described body of rod adopts glass fiber and the moulding of vinyl ester resin winding process, bottom integrated moulding flange.
Described lead seat adopts glass fiber and the moulding of epoxy resin laminating technology.
Described gold utensil, clip, end cap and sleeve adopt the metal material manufacturing, and plating zinc on surface is anticorrosion.
Described clip is the branch body structure of front and back symmetry, and each half clip comprises the semicircular ring structure and the left and right sides draw-in groove structure consistent with the cross-arm shape of cross section, processing mounting holes on the draw-in groove structure at middle part.
Described end cap is an asymmetric split mechanism, partly form by small circle ring part and large circle, the middle part annulus of small circle ring part and large circle part is partly formed a complete circle, respectively there is a mounting platform both sides of small circle ring part and large circle part, processing mounting holes on the mounting platform, processing lead seat mounting platform on the large circle part, the width w=2h of lead seat mounting platform, wherein h is the distance from the chord to the centre of lead seat mounting platform outer ledge, w＞w
d, w
dBe lead seat width.
Described gold utensil is the outstanding laminated structure in middle part, and the middle part is given prominence to and is the arc surface of indent.
The present invention compared with prior art beneficial effect is:
(1) the present invention adopts special change wall thickness body of rod structure design, makes material bring into play its best bearing function and has reduced cost of manufacture;
(2) body of rod of the present invention adopts winding method global formation body of rod root glass fiber reinforced plastic flange, when convenient and ground are installed, has satisfied mechanical property requirements;
(3) the present invention designs different materials and moulding process is produced the body of rod, cross-arm and lead seat, is satisfying that electric pole is corrosion-resistant, in the electrical insulation capability, is satisfying multiple functional requirements such as performance can design, loss of weight again;
(4) the present invention adopts gold utensil, clip and the end cap of special construction, has satisfied mechanical property requirements in simple in structure, light, easy for installation.
Description of drawings
Fig. 1 is a body of rod structural representation of the present invention;
Fig. 2 is the body of rod of the present invention bottom and sleeve annexation structural representation;
Fig. 3 is the body of rod of the present invention top and cross-arm annexation structural representation;
Fig. 4 is a clip front view of the present invention;
Fig. 5 is a clip vertical view of the present invention;
Fig. 6 is the sectional view of Fig. 5 A-A direction;
Fig. 7 is an end cap front view of the present invention;
Fig. 8 is an end cap vertical view of the present invention;
Fig. 9 is a gold utensil front view of the present invention;
Figure 10 is a gold utensil vertical view of the present invention.
The specific embodiment
The present invention is shown in Fig. 2,3, comprise the body of rod 1, cross-arm 2, lead seat 3, gold utensil 4, clip 5, end cap 6 and sleeve 7, cross-arm 2 is installed in the top of the body of rod 1 by clip 5, end cap 6 is installed on the body of rod 1 top, three cover lead seats 3 and gold utensil 4 are fixed on the two ends and end cap 6 of cross-arm 2 with screw 8 respectively, it is sleeved 7 that the bottom of the body of rod 1 is overlapped, fixing cord between lead seat 3 and the gold utensil 4.
1, the body of rod
The loading characteristic of the body of rod is the stressed minimum in body of rod top, and is stressed serious more near body of rod root more.Therefore, according to its loading characteristic, the body of rod is designed to the even thickening degree of hollow taper form, it is body of rod root thickness maximum, reduce gradually to body of rod top-direction, wall thickness change rate (varied in thickness on the unit length) δ is 0.15%～0.2%, wherein the wall thickness change rate
d
MaxFor the thickest of the body of rod is a body of rod wall thickness bottom, d
MinFor the minimum wall thickness (MINI W.) of the body of rod is a body of rod wall thickness topmost, l is the bus length of the body of rod.Can give full play to the carrying effect of material like this, when satisfying force request, reduce cost to greatest extent.At body of rod root global formation flange flange, be convenient to the body of rod and be connected with ground.Body of rod structure chart is seen shown in Figure 1.
The body of rod adopts glass, the moulding of vinyl ester resin winding process.Technological process is: glass fiber dipped → winding → curing → demoulding → brushing paint.The fiber volume fraction height of Wrapping formed goods, mechanical property is higher, the circumferential strength height, and pass through the design that the design of fiber canoe realizes product properties easily.Process is simple, and constant product quality is applicable to batch process.
Concrete manufacturing process is: continuous glass fiber after flooding the vinyl ester resin glue, on the core that is wound into the winding mould that at the uniform velocity rotates under the tension force effect, when satisfying the product thickness requirement, stop to twine, then by the normal temperature cure moulding, after room temperature hangs and solidifies 24h, with product stripping, make goods, the anti-aging coating of HBC-01 type of external coating green with definite shape.
2, cross-arm
Insulator crossarm designs when satisfying its force request as shown in Figure 3, and cross section adopts the uniform section form, and as structures such as pipe, square tube, profiled-cross-section pipes, this structure is convenient to adopt the pultrude process moulding.
Cross-arm adopts glass, vinyl ester resin pultrusion.Technological process is: glass fiber dipped → as to finalize the design → as to solidify → as to cut → brushing paint.Pultrusion product fiber volume fraction height, the mechanical property height, particularly vertically specific strength and specific stiffness are particularly outstanding, low cost of manufacture, can produce continuously, the speed of production height can be pressed the loading status of structure member and arrange fiber, lateral arrangement fiber when also can be implemented in pultrusion makes the transverse mechanical performance of goods increase substantially.
The production technology of cross-arm is: the glass fiber that will flood vinyl ester resin is under the haulage gear tension, pass through mould shape, and in mould, solidify, extract the unrestricted fibre glass product manufacture of length continuously, be cut into the length of requirement again through cutting machine, at the anti-aging coating of HBC-01 type of product surface brushing green.
3, lead seat
The lead seat adopts glass/epoxy laminate technological forming as shown in Figure 3.The technological process of lead seat is the glass fiber dipped → cutting → shop layer → curing → demoulding → processing → brushing paint, when satisfying electrical insulation capability, and the product strength height, constant product quality can be produced in batches.Glass fiber reinforced plastic lead seat be connected gold utensil and constitute the effect that the lead card plays fixing cord jointly.
The production technology of lead seat is: glass fiber preimpregnation cloth is pressed the die size cutting, paving is successively solidified on hydraulic press until required thickness in mould, solidifies the back demoulding that finishes, be processed into the size that needs, the anti-aging coating of HBC-01 type of external coating green.
4, metalwork
Sleeve, clip, end cap, gold utensil all adopt metal material processing, and plating zinc on surface is anticorrosion.Each metalwork is simple in structure, light, satisfies mechanical property requirements.
Sleeve 7 as shown in Figure 2, columnar structured for the bottom flange, the flange of bottom flange and the body of rod 1 bottom global formation by bolt together.
Clip 5 adopts the branch body structure of front and back symmetry shown in Fig. 4～6, each half clip comprises the semicircular ring structure 51 and the left and right sides draw-in groove structure 52 consistent with cross-arm 2 shape of cross sections at middle part, and processing mounting holes 53 on draw-in groove structure 52.Middle part semicircular ring structure 51 is enclosed within the top of the body of rod 1, left and right sides draw-in groove 52 blocks cross-arm 2 from front and back, bolt passes installing hole 53 cross-arm 2 is fixed on the body of rod 1, and the structure of draw-in groove is corresponding with the shape of cross section of cross-arm, is the draw-in groove structure of square tube for the cross section of cross-arm among Fig. 6.
End cap 6 is shown in Fig. 7,8, be asymmetric split mechanism, form by small circle ring part 61 and large circle part 62, the middle part annulus of small circle ring part 61 and large circle part 62 is partly formed a complete circle, the dissymmetrical structure that end cap 6 is divided into small circle ring part 61 and large circle part 62 is to be an integral body in order to make lead seat mounting platform, gains in strength.Respectively there is a mounting platform 63 both sides of small circle ring part 61 and large circle part 62, processing mounting holes 65 on the mounting platform 63, processing lead seat mounting platform 64 on large circle part 62, lead seat mounting platform 64 is symmetrically distributed at the horizontal center line of the circle that the middle part annulus of small circle ring part 61 and large circle part 62 is partly formed, be the width w=2h of lead seat mounting platform 64, wherein h is the distance from the chord to the centre of lead seat mounting platform 64 outer ledges, w＞w
d, w
dBe lead seat width.End cap 6 is enclosed within the body of rod 1 upper end, and bolt passes the installing hole 65 on the mounting platform 63, and end cap 6 is fixed on the body of rod 1, and lead seat 3 is installed on the lead seat mounting platform 64.
Gold utensil 4 is the outstanding laminated structure in middle part shown in Fig. 9,10, the arc surface at middle part cooperates fixing cord with the arc surface of lead seat.
The anti-aging coatings of all piece surface brushings such as the body of rod, cross-arm, metalwork, with performances such as the ageing resistance by ultraviolet light that improves composite material, weatherabilities, the color of coating has excellent environment friendly and propaganda generalization through apolegamy meticulously simultaneously.
The performance of the electric pole that the present invention obtains:
Glass fiber reinforced plastic electric pole insulating properties are good, can dwindle the transmission line of electricity width, save floor occupying area;
Glass fiber reinforced plastic electric pole fine corrosion resistance, seriously corroded area use can improve application life and increase safety factor in coastal, salt-soda soil etc.;
(3) glass fiber reinforced plastic electric pole intensity height, under the most serious working condition, the amount of deflection that takes place during the electric pole carrying sees the following form, and under 200% load, material does not destroy;
(4) the composite material electric pole weight loss effect is obvious, and the about 500kg of whole loss of weight can effectively reduce transportation, installation cost, and is easy for installation at high mountain and swamp land.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (8)
1. glass fiber reinforced plastic electric pole, it is characterized in that: comprise the body of rod (1), cross-arm (2), lead seat (3), gold utensil (4), clip (5), end cap (6) and sleeve (7), cross-arm (2) is installed in the top of the body of rod (1) by clip (5), end cap (6) is installed on the body of rod (1) top, three cover lead seats (3) and gold utensil (4) are screwed respectively on the two ends and end cap (6) of cross-arm (2), the bottom cover sleeved (7) of the body of rod (1), fixing cord between lead seat (3) and the gold utensil (4), the described body of rod (1) is the hollow cone shape structure that evenly becomes wall thickness, wall thickness change rate δ is 0.15%～0.2%, wherein the wall thickness change rate
d
MaxFor the thickest of the body of rod (1) is the body of rod (a 1) wall thickness bottom, d
MinFor the minimum wall thickness (MINI W.) of the body of rod (1) is the body of rod (a 1) wall thickness topmost, l is the bus length of the body of rod (1).
2. a kind of glass fiber reinforced plastic electric pole according to claim 1 is characterized in that: the cross section of described cross-arm (2) adopts the uniform section form, adopts glass fiber and vinyl ester resin pultrusion.
3. a kind of glass fiber reinforced plastic electric pole according to claim 1 is characterized in that: the described body of rod (1) adopts glass fiber and the moulding of vinyl ester resin winding process, bottom integrated moulding flange.
4. a kind of glass fiber reinforced plastic electric pole according to claim 1 is characterized in that: described lead seat (3) adopts glass fiber and the moulding of epoxy resin laminating technology.
5. a kind of glass fiber reinforced plastic electric pole according to claim 1 is characterized in that: described gold utensil (4), clip (5), end cap (6) and sleeve (7) adopt the metal material manufacturing, and plating zinc on surface is anticorrosion.
6. a kind of according to claim 1 or 5 glass fiber reinforced plastic electric pole, it is characterized in that: described clip (5) is the branch body structure of front and back symmetry, each half clip comprises the semicircular ring structure (51) and the left and right sides draw-in groove structure (52) consistent with cross-arm (2) shape of cross section at middle part, goes up processing mounting holes (53) in draw-in groove structure (52).
7. a kind of according to claim 1 or 5 glass fiber reinforced plastic electric pole, it is characterized in that: described end cap (6) is asymmetric split mechanism, form by small circle ring part (61) and large circle part (62), the middle part annulus of small circle ring part (61) and large circle part (62) is partly formed a complete circle, respectively there is a mounting platform (63) both sides of small circle ring part (61) and large circle part (62), mounting platform (63) is gone up processing mounting holes (65), go up processing lead seat mounting platform (64) in large circle part (62), the width w=2h of lead seat mounting platform (64), wherein h is the distance from the chord to the centre of lead seat mounting platform (64) outer ledge, w＞w
d, w
dBe lead seat width.
8. a kind of according to claim 1 or 5 glass fiber reinforced plastic electric pole is characterized in that: described gold utensil (4) is the outstanding laminated structure in middle part, and the middle part is given prominence to and is the arc surface of indent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110092426 CN102134931B (en) | 2011-04-13 | 2011-04-13 | Fiberglass reinforced plastic telegraph pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110092426 CN102134931B (en) | 2011-04-13 | 2011-04-13 | Fiberglass reinforced plastic telegraph pole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102134931A true CN102134931A (en) | 2011-07-27 |
| CN102134931B CN102134931B (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110092426 Active CN102134931B (en) | 2011-04-13 | 2011-04-13 | Fiberglass reinforced plastic telegraph pole |
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| Country | Link |
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| CN (1) | CN102134931B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251065A (en) * | 2014-10-21 | 2014-12-31 | 合肥海银杆塔有限公司 | Composite material pole tower with reinforcing device |
| CN104453332A (en) * | 2013-09-22 | 2015-03-25 | 国家电网公司 | Transmission tower |
| CN107762248A (en) * | 2017-11-25 | 2018-03-06 | 嘉兴市恒创电力设备有限公司 | A kind of aramid fiber composite material cross-arm |
| CN108180117A (en) * | 2018-01-09 | 2018-06-19 | 重庆大学 | Anticorrosion offshore wind farm tower composite structure |
| CN108407326A (en) * | 2018-05-11 | 2018-08-17 | 湖北中复能新型材料有限公司 | A kind of FRP thin-walleds electric pole and its manufacturing method |
| CN113236011A (en) * | 2021-06-03 | 2021-08-10 | 河北久金电力器材制造有限公司 | Cross arm convenient to install and method for enabling cross arm to be convenient to install |
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| US20090126284A1 (en) * | 2007-01-19 | 2009-05-21 | Thomas & Betts International, Inc. | Arm connection for a structural member |
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| CN201695741U (en) * | 2010-05-04 | 2011-01-05 | 河南省电力公司三门峡供电公司 | Telegraph pole |
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| CA979174A (en) * | 1973-08-16 | 1975-12-09 | Ivan Copf | Transmission pole and arm connection |
| CN2383915Y (en) * | 1999-04-15 | 2000-06-21 | 艾永华 | Light combined wire pole |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453332A (en) * | 2013-09-22 | 2015-03-25 | 国家电网公司 | Transmission tower |
| CN104251065A (en) * | 2014-10-21 | 2014-12-31 | 合肥海银杆塔有限公司 | Composite material pole tower with reinforcing device |
| CN107762248A (en) * | 2017-11-25 | 2018-03-06 | 嘉兴市恒创电力设备有限公司 | A kind of aramid fiber composite material cross-arm |
| CN108180117A (en) * | 2018-01-09 | 2018-06-19 | 重庆大学 | Anticorrosion offshore wind farm tower composite structure |
| CN108180117B (en) * | 2018-01-09 | 2023-10-31 | 重庆大学 | Corrosion-resistant offshore wind power tower tube combined structure |
| CN108407326A (en) * | 2018-05-11 | 2018-08-17 | 湖北中复能新型材料有限公司 | A kind of FRP thin-walleds electric pole and its manufacturing method |
| CN113236011A (en) * | 2021-06-03 | 2021-08-10 | 河北久金电力器材制造有限公司 | Cross arm convenient to install and method for enabling cross arm to be convenient to install |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102134931B (en) | 2012-06-20 |
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