CN110116449A - Durable electric pole of a kind of multisection type lightweight height and preparation method thereof - Google Patents
Durable electric pole of a kind of multisection type lightweight height and preparation method thereof Download PDFInfo
- Publication number
- CN110116449A CN110116449A CN201810122610.7A CN201810122610A CN110116449A CN 110116449 A CN110116449 A CN 110116449A CN 201810122610 A CN201810122610 A CN 201810122610A CN 110116449 A CN110116449 A CN 110116449A
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- Prior art keywords
- rod
- electric pole
- multisection type
- type lightweight
- high durable
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
- B28B1/523—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing metal fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
- B28B21/30—Centrifugal moulding
- B28B21/32—Feeding the material into the moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
Abstract
The invention discloses high durable electric poles of a kind of multisection type lightweight and preparation method thereof.The electric pole includes the integrally formed root body of rod, stem's body of rod and the taper body of rod from the bottom to top；Preparation method are as follows: (1) the cloth root body of rod；(2) the cloth stem body of rod；(3) the cloth taper body of rod；(4) after the completion of root, stem and taper body of rod cloth, centrifugal forming is carried out to the body of rod, it is quiet to stop conserving, obtain the high durable electric pole of multisection type lightweight.Electric pole good economy performance that the method for the present invention is prepared, easily fabricated, light-weight, durability is good, is suitable for mountain area, High aititude, high corrosion environment.
Description
Technical field
The invention belongs to converting electricity fields, and in particular to a kind of high durable electric pole of multisection type lightweight and its preparation side
Method.
Background technique
Concurrent is widely used in electric power, communication and the engineerings such as contact net overhead transmission line lighting mast and signal column,
Its environmental difference is larger.Concurrent has the advantages that intensity is high, durability is good under drying, corrosion-free environment, the general longevity
For life at 30 years or so, highest can be more than 50 years.
Under the adverse circumstances such as rice field, reed pond, marsh, salt-soda soil, coastal area, due to concurrent be in ground or
The junction of the water surface and atmosphere also suffers from drying and watering cycle, Frozen-thawed cycled, cold and hot while being subjected to adverse environmental factors effect
The joint effect of the unfavorable conditions such as alternating causes the concrete layer of concurrent that burn into cracking occurs, peels off, and reinforcing bar occurs
Corrosion, eventually lead to down bar, and serious curtailment service life, service life only have 5-7.
In addition, traditional electric pole thickness is larger, single electric pole weight is often beyond very heavy, even if using sectional making scene group
The mode of dress, the weight of every section of electric pole are also up to hundreds of jin, same difficulty are installed after assembling, especially to haulage vehicle and lifting
Mountain area that equipment is difficult to enter, forest, high altitude localities, the erection of conventional concrete electric pole are very difficult.
For steel construction pylon, transport assembling is more convenient, but in humid area, Acid Rain Area, windy and sandy area, salt fog
Area, since steel easily corrodes, steel construction power tower, communications tower must periodically carry out protectiveness coating, maintenance
Heavy workload, comprehensive cost are high.
Currently, having correlative study, patent and the life using ultra-high performance concrete or the high durable electric pole of RPC preparation lightweight
Practice is produced, but the material cost of UHPC and RPC is high, limits promotion and application of this kind of material in concurrent.
To sum up, a kind of good economy performance, concurrent easily fabricated, light-weight, durability is good are designed and developed, is had
Conducive to concurrent in mountain area, the application of High aititude, high corrosion occasion, to promote building for local mesh subdivision electric power network
If transformation is expanded and can be upgraded, and reduces installation maintenance cost.
Summary of the invention
For above-mentioned deficiency in the prior art, the present invention provides a kind of high durable electric pole of multisection type lightweight and its preparation side
Method can effectively solve existing electric pole intensity deficiency, and resistance is weaker in harsh environment, the high problem of manufacturing cost.
To achieve the above object, the technical solution adopted by the present invention to solve the technical problems is:
A kind of preparation method of the high durable electric pole of multisection type lightweight, comprising the following steps:
(1) it prepares the root body of rod: the stainless steel fibre for accounting for its volume 0~6% being added into concrete, stirs evenly, cloth
Material is into pipe die；
(2) it prepares stem's body of rod: the steel fibre for accounting for its volume 0~4% being added into concrete, stirs evenly, Yu Tongyi
Cloth in pipe die；
(3) it prepares the taper body of rod: the steel fibre for accounting for its volume 0~3% being added into concrete, stirs evenly, Yu Tongyi
Cloth in pipe die；
(4) after the completion of root, stem and taper body of rod cloth, centrifugation is quiet to stop conserving, and obtains the high durable electricity of multisection type lightweight
Bar.
Further, further includes: in step (1) before preparing the root body of rod, reinforcing bar effective sectional area is added into pipe die
For 110~3300mm2Steel reinforcement cage, then carry out prestressed stretch-draw before centrifugation in step (4), centrifugation, it is quiet stop maintenance after
Prestressing force is carried out respectively puts an operation.
Further, concrete is RPC that strength grade is RPC100-RPC180 in step (1) or strength grade is C80
The HPC or UHPC of~C160；
Concrete is RPC that strength grade is RPC100-RPC160 in step (2) or strength grade is C70~C140's
HPC or UHPC；
Concrete is RPC that strength grade is RPC100-RPC160 in step (3) or strength grade is C50~C140's
HPC or UHPC.
Further, steel fibre is copper facing microfilament steel fibre in step (2).
Further, the process being centrifuged in step (4) are as follows: 60~300s is centrifuged at 50~120r/min, then gradually
300~1200r/min is accelerated to, and is centrifuged 60~480s.
It is further, quiet in step (4) to stop maintenance processes are as follows:
1~8h is stood, is then warming up to 40 DEG C with 5-20 DEG C/h rate, keeps 1-12h；Again with the heating of 5-20 DEG C/h rate
To 60 DEG C, 1-12h is kept；Continue to be warming up to 90 DEG C with 5-20 DEG C/h rate, keeps 3-48h；Finally with 10-25 DEG C/h rate drop
Wen Zhiyu room temperature difference be less than or equal to 20 DEG C until, then demould, lifting stack, and carry out according to a conventional method it is secondary maintenance 26~
28 days.
The high durable electric pole of multisection type lightweight being prepared using the above method.
Further, including from the bottom to top the integrally formed root body of rod, stem's body of rod and the top body of rod；The root bar
Support point is provided on body.
Further, the root body of rod is with a thickness of 15~60mm, and the length is by bar bottom to support or more 0.1~5m；Institute
Stem's body of rod is stated with a thickness of 8~30mm, the length is by support or more 0.1~5m to bar top or less, 0~8m；The taper bar
Body thickness is 10~40mm, and the length is along the downward 0~8m in bar top.
Further, it supports that the body of rod is at point with a thickness of 30~60mm, and point is supported to support a little into bar bottom 0.3-1m
Place's body of rod thickness is gradually decrease to support that the body of rod is thick at point into bar top 0.5-3m with root body of rod consistency of thickness, support point
Degree is gradually decrease to and stem's body of rod consistency of thickness.
The invention has the benefit that
1, in maintenance processes, in the different temperature rise periods, the rate of heating is different, primarily to preventing from heating up too fast and making
RPC intensity does not attain full development, so that the formative stage in electric pole causes crack or influences intensity.
2, for the method for the present invention in centrifugal process, required time is longer than spent time in traditional handicraft centrifugal process, main
If in 50~120r/min centrifugal process, the time passes section and is easy to be unevenly distributed, 300~1200r/ since RPC is more sticky
In min centrifugal process, the too short different surely closely knit molding well of centrifugation time, the centrifugation referred to as a result, using the present invention
Journey can be such that RPC forms well.
3, the high durable electric pole of lightweight of the present invention, by different parts institute in electric pole root and middle part use process
The varying environment at place pointedly each section concrete performance of design optimization, can Integratively formed or segmentation manufacture assembling, institute's shape
At the high perdurable concrete electric pole of lightweight, realize the thin of electric pole due to using high-intensitive high durable ultra-high performance concrete
Wall lightweight manufacture, by subsection setup, improves durability, economy and further realizes lightweight, and weight is relatively the same as rule
Lattice tradition electric pole reduces half, and the occasion being difficult to enter to the installation equipment such as mountain area, forest has significant advantage.
Specific embodiment
A specific embodiment of the invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the column of protection.
A kind of high durable electric pole of multisection type lightweight, including the integrally formed root body of rod, stem's body of rod and top from the bottom to top
Portion's body of rod, and support point is provided on the body of rod of root, which is the position that electric pole intersects with soil surface layer, wherein root
Portion's body of rod is with a thickness of 15~60mm, and the length is by bar bottom to support or more 0.1~5m；Stem's body of rod with a thickness of 8~
30mm, the length is by support or more 0.1~5m to bar top or less, 0~8m；The taper body of rod with a thickness of 10~40mm,
Length is as a result, when stem's body of rod length is by supporting or more 0.1~5m to bar top, i.e., not deposit along the downward 0~8m in bar top
In the taper body of rod；Moreover, supporting that the body of rod is at point with a thickness of 30~60mm, and point is supported to be supported at point into bar bottom 0.3-1m
Body of rod thickness is gradually decrease to support body of rod thickness at point into bar top 0.5-3m with root body of rod consistency of thickness, support point
It is gradually decrease to and stem's body of rod consistency of thickness.Preparation method is as follows.
Embodiment 1
A kind of preparation method of the high durable electric pole of multisection type lightweight, comprising the following steps:
(1) stainless steel fibre for accounting for its volume 3% is added into the RPC that strength grade is RPC100, stirs evenly, then
Through High pressure cement pump cloth into pipe die, formation is by electric pole bottom to electric pole support or more 1m, electric pole wall thickness
The root body of rod of 20mm, wherein support point position to be arranged according to the actual situation, support that the body of rod wall thickness at point is 40mm；
(2) the copper facing microfilament steel fibre for accounting for its volume 3% is added into the RPC that strength grade is RPC140, stirs evenly,
Then it through High pressure cement pump and root body of rod cloth into same pipe die, is formed by support or more 1m to bar top or less
3m, electric pole wall thickness are stem's body of rod of 20mm；
(3) steel fibre for accounting for its volume 2% is added into the RPC that strength grade is RPC140, stirs evenly, passes through high pressure
Concrete pump makes it with the root body of rod and stem's body of rod cloth in same pipe die, forms, length 3m downward along bar top, electric pole
Wall thickness is the taper body of rod of 10mm；
(4) after the completion of root, stem and taper body of rod cloth, 180s is centrifuged under 120r/min, then ramp up to
300r/min is centrifuged 360s；5h is stood, is then warming up to 40 DEG C with 10 DEG C/h rate, constant temperature 5h；It is warming up to 10 DEG C/h rate
60 DEG C, constant temperature 5h；90 DEG C are warming up to 10 DEG C/h rate, constant temperature 12h；It is cooled to differ with room temperature with 20 DEG C of rates and be less than or equal to
20℃；Then it demoulds, lifting is stacked, and carries out secondary maintenance 26~28 days according to a conventional method, obtains the high durable electricity of multisection type lightweight
Bar.
Embodiment 2
A kind of preparation method of the high durable electric pole of multisection type lightweight, comprising the following steps:
(1) steel reinforcement cage that reinforcing bar effective sectional area is 308 square millimeters is placed in pipe die, it will by High pressure cement pump
Strength grade is the RPC cloth of RPC160 into pipe die, is formed by electric pole bottom to electric pole support or more 1.5m, electric pole wall thickness
Degree is the root body of rod of 25mm, wherein supports point position to be arranged according to the actual situation, supports that the body of rod wall thickness at point is
30mm；
(2) by High pressure cement pump by strength grade be RPC100 RPC and root body of rod cloth into same pipe die,
It is formed by support or more 1.5m to bar top or less 4m, electric pole wall thickness is stem's body of rod of 25mm；
(3) by High pressure cement pump by RPC that strength grade is RPC100 and the root body of rod and stem's body of rod cloth in
In same pipe die, length 4m downward along bar top is formed, electric pole wall thickness is the taper body of rod of 20mm；
(4) after the completion of root, stem and taper body of rod cloth, prestressed stretch-draw is carried out, is then centrifuged under 100r/min
Then 100s is centrifuged 150s under 800r/min；8h is stood, is then warming up to 40 DEG C with 10 DEG C/h rate, keeps 4h；Again with
10 DEG C/h rate is warming up to 60 DEG C, keeps 8h；Continue to be warming up to 90 DEG C with 10 DEG C/h rate, keep for 24 hours；Finally with 15 DEG C of rates
It is cooled to until being differed with room temperature less than or equal to 20 DEG C；Then it carrying out prestressing force and puts an operation, finally demould, lifting is stacked, and
Secondary maintenance 28 days is carried out according to a conventional method, obtains the high durable electric pole of multisection type lightweight.
Embodiment 3
A kind of preparation method of the high durable electric pole of multisection type lightweight, comprising the following steps:
(1) stainless steel fibre for accounting for its volume 5% is added into the RPC that strength grade is RPC180, stirs evenly, then
Through High pressure cement pump cloth into pipe die, formation is by electric pole bottom to electric pole support or more 0.5m, electric pole wall thickness
The root body of rod of 25mm, wherein support point position to be arranged according to the actual situation, support that the body of rod wall thickness at point is 50mm；
(2) the copper facing microfilament steel fibre for accounting for its volume 4% is added into the RPC that strength grade is RPC160, stirs evenly,
Then by High pressure cement pump by it with root body of rod cloth into same pipe die, formed by supporting or more 0.5m to bar
Top, electric pole wall thickness are stem's body of rod of 25mm；
(3) after the completion of root and stem's cloth, it is centrifuged 300s under 50r/min, is then centrifuged under 1000r/min
240s；8h is stood, is then warming up to 40 DEG C with 12 DEG C/h rate, keeps 10h；60 DEG C are warming up to 12 DEG C/h rate again, is kept
10h；Continue to be warming up to 90 DEG C with 12 DEG C/h rate, keeps 48h；It finally is cooled to differ with room temperature with 20 DEG C of rates and be less than or equal to
It until 20 DEG C, then demoulds, lifting is stacked, and carries out secondary maintenance 28 days according to a conventional method, obtains the high durable electricity of multisection type lightweight
Bar.
Embodiment 4
A kind of preparation method of the high durable electric pole of multisection type lightweight, comprising the following steps:
(1) steel reinforcement cage that reinforcing bar effective sectional area is 1017 square millimeters is placed in pipe die, is then to strength grade
The stainless steel fibre for accounting for its volume 1% is added in the RPC of RPC120, stirs evenly, then passes through High pressure cement pump cloth to pipe
In mould, formed by electric pole bottom to electric pole support or more 0.5m, total length 4m, electric pole wall thickness is the root bar of 25mm
Body, wherein support point position to be arranged according to the actual situation, support that the body of rod wall thickness at point is 30mm；
(2) steel fibre for accounting for its volume 0.5% is added into the RPC that strength grade is RPC140, stirs evenly, then leads to
Cross High pressure cement pump by it with root body of rod cloth into same pipe die, formed by support or more 0.5m to bar top or less
6m, electric pole wall thickness are stem's body of rod of 25mm；
(3) steel fibre for accounting for its volume 0.5% is added into the RPC that strength grade is RPC120, stirs evenly, passes through height
Pressure concrete pump makes it with the root body of rod and stem's body of rod cloth in same pipe die, forms, length 6m downward along bar top, electricity
Bar wall thickness is the taper body of rod of 20mm；
(4) after the completion of root, stem and taper body of rod cloth, prestressed stretch-draw is carried out, is then centrifuged at 80r/min
300s is centrifuged 230s under 600r/min；8h is stood, is then warming up to 40 DEG C with 10 DEG C/h rate, keeps 6h；Again with 10
DEG C/h rate is warming up to 60 DEG C, keep 6h；Continue to be warming up to 90 DEG C with 10 DEG C/h rate, keeps 48h；Finally dropped with 15 DEG C of rates
Until Wen Zhiyu room temperature difference is less than or equal to 20 DEG C；Then it carries out prestressing force and puts an operation, finally demould, lifting is stacked, and is pressed
Conventional method carries out secondary maintenance 28 days, obtains the high durable electric pole of multisection type lightweight.
Comparative example
The electric pole being prepared using conventional method.
Detection
Under the conditions of high corrosion, high windsand mill corrosion, the corrosion resistance of electric pole is detected: after using 3~5 years, comparative example 1
Reinforcing bar almost all in the electric pole being prepared is exposed outside, and produces corrosion, and the height that embodiment 1 is prepared is resistance to
Long electric pole, though external protection part be corroded, the steel fibre in it is still wrapped in concrete, not yet it is exposed outside,
Support strength and service life have obtained maximum guarantee.
The durable electric pole of height being prepared as a result, using the method for the present invention, that is, can guarantee its support strength, and can promote it
Resistance to corrosion promotes service life, is conducive to the application in salt fog, dust storm and high corrosion occasion.
Claims (10)
1. a kind of preparation method of the high durable electric pole of multisection type lightweight, which comprises the following steps:
(1) it prepares the root body of rod: the stainless steel fibre for accounting for its volume 0~6% being added into concrete, stirs evenly, cloth is extremely
In pipe die；
(2) it prepares stem's body of rod: the steel fibre for accounting for its volume 0~4% being added into concrete, stirs evenly, Yu Tongyi pipe die
Middle cloth；
(3) it prepares the taper body of rod: the steel fibre for accounting for its volume 0~3% being added into concrete, stirs evenly, Yu Tongyi pipe die
Middle cloth；
(4) after the completion of root, stem and taper body of rod cloth, centrifugation is quiet to stop conserving, and obtains the high durable electric pole of multisection type lightweight.
2. the preparation method of the high durable electric pole of multisection type lightweight according to claim 1, which is characterized in that further include: step
Suddenly in (1) before preparing the root body of rod, it is 110~3300mm that reinforcing bar effective sectional area is added into pipe die2Steel reinforcement cage, then
Step carries out prestressed stretch-draw in (4) before centrifugation, in centrifugation, quiet stops carrying out prestressing force respectively after maintenance to put operation.
3. the preparation method of the high durable electric pole of multisection type lightweight according to claim 1, which is characterized in that in step (1)
The HPC or UHPC that the concrete is the RPC that strength grade is RPC100-RPC180 or strength grade is C80~C160；
Concrete described in step (2) is the RPC that strength grade is RPC100-RPC160 or strength grade is C70~C140's
HPC or UHPC；
Concrete described in step (3) is the RPC that strength grade is RPC100-RPC160 or strength grade is C50~C140's
HPC or UHPC.
4. the preparation method of the high durable electric pole of multisection type lightweight according to claim 1, which is characterized in that in step (2)
The steel fibre is copper facing microfilament steel fibre.
5. the preparation method of the high durable electric pole of multisection type lightweight according to claim 1, which is characterized in that in step (4)
The process of the centrifugation are as follows: it is centrifuged 60~300s at 50~120r/min, then ramps up to 300~1200r/min, and
It is centrifuged 60~480s.
6. the preparation method of the high durable electric pole of multisection type lightweight according to claim 1, which is characterized in that in step (4)
It is described quiet to stop maintenance processes are as follows:
1~8h is stood, is then warming up to 40 DEG C with 5-20 DEG C/h rate, keeps 1-12h；60 are warming up to again with 5-20 DEG C/h rate
DEG C, keep 1-12h；Continue to be warming up to 90 DEG C with 5-20 DEG C/h rate, keeps 3-48h；Finally it is cooled to 10-25 DEG C/h rate
It differs with room temperature until being less than or equal to 20 DEG C, then demoulds, lifting is stacked, and carries out secondary maintenance 26~28 according to a conventional method
It.
7. using the high durable electric pole of multisection type lightweight that any one of claim 1~6 the method is prepared.
8. the high durable electric pole of multisection type lightweight according to claim 7, which is characterized in that including being integrally formed from the bottom to top
The root body of rod, stem's body of rod and the top body of rod；Support point is provided on the root body of rod.
9. the high durable electric pole of multisection type lightweight according to claim 8, which is characterized in that the root body of rod is with a thickness of 15
~60mm, the length is by bar bottom to support or more 0.1~5m；Stem's body of rod with a thickness of 8~30mm, the length is by
Support or more 0.1~5m to bar top or less, 0~8m；The taper body of rod with a thickness of 10~40mm, the length is along bar top to
Lower 0~8m.
10. the high durable electric pole of multisection type lightweight according to claim 8, which is characterized in that the body of rod is thick at the support point
Degree is 30~60mm, and point is supported to support that body of rod thickness is gradually decrease to and root body of rod thickness at point into bar bottom 0.3-1m
Degree is consistent, and point is supported to support that body of rod thickness is gradually decrease to and stem's body of rod consistency of thickness at point into bar top 0.5-3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810122610.7A CN110116449A (en) | 2018-02-07 | 2018-02-07 | Durable electric pole of a kind of multisection type lightweight height and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810122610.7A CN110116449A (en) | 2018-02-07 | 2018-02-07 | Durable electric pole of a kind of multisection type lightweight height and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110116449A true CN110116449A (en) | 2019-08-13 |
Family
ID=67519575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810122610.7A Pending CN110116449A (en) | 2018-02-07 | 2018-02-07 | Durable electric pole of a kind of multisection type lightweight height and preparation method thereof |
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| CN (1) | CN110116449A (en) |
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2018
- 2018-02-07 CN CN201810122610.7A patent/CN110116449A/en active Pending
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| CN201011176Y (en) * | 2007-01-25 | 2008-01-23 | 李留成 | Anti-corrosion steel fiber reinforced concrete telephone pole |
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| CN203487853U (en) * | 2013-10-16 | 2014-03-19 | 祁锦明 | Connecting component of multiple sections of conical concrete poles |
| KR101617247B1 (en) * | 2015-01-15 | 2016-05-02 | 주식회사 충주산업 | Steel Fiber Rreinforced Telegraph Pole And Production Method Thereof |
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Application publication date: 20190813 |