CN111702946A - Ultrahigh-strength steel fiber electric pole and production process thereof - Google Patents
Ultrahigh-strength steel fiber electric pole and production process thereof Download PDFInfo
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- CN111702946A CN111702946A CN202010633027.XA CN202010633027A CN111702946A CN 111702946 A CN111702946 A CN 111702946A CN 202010633027 A CN202010633027 A CN 202010633027A CN 111702946 A CN111702946 A CN 111702946A
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- 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
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- 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
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- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B21/68—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts and applying centrifugal forces
-
- 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
- B28B21/90—Methods or apparatus for demoulding or discharging after shaping
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention relates to the technical field of electric pole production, in particular to an ultra-high strength steel fiber electric pole and a production process thereof. The normal pressure steam curing mode of the electric pole adopts a maintenance pit mode, and has the advantages of simple equipment structure, convenient construction, less investment and quick response, and can be well adapted to the change of various electric pole varieties and specifications.
Description
Technical Field
The invention relates to the technical field of electric pole production, in particular to an ultrahigh-strength steel fiber electric pole and a production process thereof.
Background
In recent years, with the increasing of national economic strength, the demand of China on electric power is also increased, the number of same ways for erecting cement poles is increased, the paths of power transmission lines are increased, the horizontal span is increased, and meanwhile, the requirements on the bearing capacity and the durability of the cement poles are increased. Conventional concrete poles, for which higher strength materials or increased cross-sectional area of the pole itself may be used if needed to increase the cross-sectional load carrying capacity of the pole, are also affordable in most areas. Thus, although the load-bearing capacity of the utility pole is improved, the weight of the utility pole is increased, the utility pole is not favorable for transportation, and the manufacturing cost is increased.
Disclosure of Invention
The invention aims to provide an ultra-high strength steel fiber electric pole and a production process thereof, which aim to solve the problems that although the bearing capacity of the electric pole is improved, the self quality is increased, the transportation is not facilitated and the manufacturing cost is increased.
In order to achieve the purpose, the invention provides the following technical scheme:
an ultra-high strength steel fiber electric pole and a production process thereof comprise the following steps:
s1, mold cleaning and oil brushing: firstly, taking out the electric pole mould, cleaning residues on the inner wall of the electric pole mould, drying the interior of the electric pole mould after cleaning, and brushing oil on the surface of the inner wall of the electric pole mould;
s2, framework entering, adjusting and positioning: manufacturing an electric pole framework by using common steel bars, prestressed tendons, erecting rings and spiral tendons, putting the prepared electric pole framework into an electric pole mould, adjusting the position and fixing the electric pole framework;
s3 adding steel fiber concrete: adding the stirred steel fiber concrete into an electric pole mold, and tamping the interior of the electric pole mold through a vibrating tamper;
s4, die assembly and prestressed tendon tensioning: after the electric pole mould is assembled, tensioning the prestressed tendons by a tensioning machine;
s5 fixation and centrifugal molding: placing the matched electric pole mold into a centrifugal machine for fixing, and performing centrifugal molding;
s6, steaming at normal pressure: placing the centrifugally formed electric pole mould into a maintenance pit for steam curing, reserving a gap with the width of 0.2-0.5m between the electric pole mould and the pit wall, covering a pit cover, and sealing the space between the pit cover and the pit wall by adopting water injection;
s7, releasing tension and removing a mold of the prestressed tendon: after the prestressed tendons are released, the electric pole mold is dismantled;
s8, curing, forming, detecting and warehousing: and (5) carrying out regular watering maintenance for 3-5 days, wherein watering is carried out once a day, and detecting and warehousing after molding.
Preferably, the common steel bar is hot rolled steel bar, and the prestressed steel bar is high-strength spiral rib steel wire, stress-relief steel wire or heat-treated steel bar.
Preferably, the diameter of the erection ring is 6-10mm, and the diameter of the spiral rib is 3.5-5 mm.
Preferably, the diameter of the main reinforcement of the ultra-high strength steel fiber electric pole is 10-20 mm.
Preferably, the diameter deviation of the erection rings is less than 1.5mm, the unevenness is less than 3mm, the distance between the erection rings is 500-1000mm, two erection rings are arranged at the joint ends of the rod sections, and the erection rings and the main ribs are bound.
Preferably, the steel bar processing step for manufacturing the electric pole framework comprises the following steps:
s1 rust removal: and brushing iron rust on the steel bars completely by using a steel wire brush or a sand disc, or pickling.
S2 straightening: the steel bars with the diameter of less than 10mm are in a coiled state, and are subjected to the procedures of coiling and straightening before use, the steel bars with the diameter of more than 10mm are all cut into straight bars with the length of 8-9m in the rolling process, then straightening treatment is carried out, and straightening is carried out by adopting a straightener;
s3 blanking: and cutting off the steel bars by a manual cutting machine, keeping the cut smooth, wherein the length deviation of the common steel bars is +/-5 mm, the steel bars with different lengths are separately stacked, and the length deviation of the prestressed steel bars is within 0.3-0.5 mm.
Preferably, the reinforced concrete adopts cement, fine aggregate, coarse aggregate, broken stone and drinking water, the cement adopts Portland cement, common salt cement, slag Portland cement or sulfate-resistant Portland cement of not less than 32.5, and the fine aggregate adopts natural river sand or medium sand. The maximum particle size of the broken stone is not more than 15mm, the ratio of drinking water to cement is 0.4-0.6, and the slump constant is 30-50 mm.
Preferably, the depth of the curing pit is 2.5 to 3.5 m.
Preferably, the step of centrifugal molding comprises a slow speed stage, a medium speed stage, a variable speed stage and a high speed stage, wherein the slow speed stage is a material distribution stage, the rotating speed of the centrifuge is 100-150r/min, the variable speed stage is specifically that a step is added every 40-45r/min, the step is not stopped for 20-30s, the total variable speed time is 100-120s, and the medium speed stage is 0.7 times of the high speed stage.
Preferably, the step of the normal-pressure steam curing comprises a temperature rise period, a constant temperature period and a temperature reduction period, wherein the temperature of the temperature rise period is 20-25 ℃ per hour, the time is 3-4 hours, the highest temperature is 80-90 ℃, the temperature of the constant temperature period is 80-90 ℃, the time is 4-6 hours, and the temperature of the temperature reduction period is 35-40 ℃ per hour until the room temperature is reduced.
Compared with the prior art, the invention has the beneficial effects that: the ultrahigh-strength steel fiber electric pole and the ultrahigh-strength steel fiber electric pole produced in the production process have the advantages of being high in strength, good in toughness, high in durability and light in weight, low in manufacturing cost, and capable of reducing cost, accelerating the hardening speed of cement through normal-pressure steam curing, improving the steel die turnover rate, shortening the production period and improving the production efficiency. The normal pressure steam curing mode of the electric pole adopts a maintenance pit mode, and has the advantages of simple equipment structure, convenient construction, less investment and quick response, and can be well adapted to the change of various electric pole varieties and specifications.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An ultra-high strength steel fiber electric pole and a production process thereof comprise the following steps:
s1, mold cleaning and oil brushing: firstly, taking out the electric pole mould, cleaning residues on the inner wall of the electric pole mould, drying the interior of the electric pole mould after cleaning, and brushing oil on the surface of the inner wall of the electric pole mould;
s2, framework entering, adjusting and positioning: manufacturing an electric pole framework by using common steel bars, prestressed tendons, erecting rings and spiral tendons, putting the prepared electric pole framework into an electric pole mould, adjusting the position and fixing the electric pole framework;
s3 adding steel fiber concrete: adding the stirred steel fiber concrete into an electric pole mold, and tamping the interior of the electric pole mold through a vibrating tamper;
s4, die assembly and prestressed tendon tensioning: after the electric pole mould is assembled, tensioning the prestressed tendons by a tensioning machine;
s5 fixation and centrifugal molding: placing the matched electric pole mold into a centrifugal machine for fixing, and performing centrifugal molding;
s6, steaming at normal pressure: placing the centrifugally formed electric pole mould into a maintenance pit for steam curing, reserving a gap with the width of 0.2-0.5m between the electric pole mould and the pit wall, covering a pit cover, and sealing the space between the pit cover and the pit wall by adopting water injection;
s7, releasing tension and removing a mold of the prestressed tendon: after the prestressed tendons are released, the electric pole mold is dismantled;
s8, curing, forming, detecting and warehousing: and (5) carrying out regular watering maintenance for 3-5 days, wherein watering is carried out once a day, and detecting and warehousing after molding.
Furthermore, the common steel bar adopts a hot rolled steel bar, and the prestressed steel bar adopts a high-strength spiral rib steel wire, a stress-relieving steel wire or a heat-treated steel bar.
Specifically, the diameter of the erecting ring is 6-10mm, the diameter of the spiral rib is 3.5-5mm, the diameter of the main rib of the ultrahigh-strength steel fiber electric pole is 10-20mm, the diameter deviation of the erecting ring is less than 1.5mm, the unevenness is less than 3mm, the distance between the erecting rings is 500-1000mm, two erecting rings are arranged at the joint end of the pole section, and the erecting rings and the main rib are bound.
It is worth to say that the processing steps of the steel bar for manufacturing the electric pole framework comprise:
s1 rust removal: and brushing iron rust on the steel bars completely by using a steel wire brush or a sand disc, or pickling.
S2 straightening: the steel bars with the diameter of less than 10mm are in a coiled state, and are subjected to the procedures of coiling and straightening before use, the steel bars with the diameter of more than 10mm are all cut into straight bars with the length of 8-9m in the rolling process, then straightening treatment is carried out, and straightening is carried out by adopting a straightener;
s3 blanking: and cutting off the steel bars by a manual cutting machine, keeping the cut smooth, wherein the length deviation of the common steel bars is +/-5 mm, the steel bars with different lengths are separately stacked, and the length deviation of the prestressed steel bars is within 0.3-0.5 mm.
In addition, the reinforced concrete adopts cement, fine aggregate, coarse aggregate, broken stone and drinking water, the cement adopts Portland cement, common salt cement, slag Portland cement or sulfate-resistant Portland cement of not less than 32.5, and the fine aggregate adopts natural river sand or medium sand. The maximum particle size of the broken stone is not more than 15mm, the ratio of drinking water to cement is 0.4-0.6, and the slump constant is 30-50 mm.
Specifically, the depth of the curing pit is 2.5-3.5 m.
It is worth to be noted that the step of centrifugal molding includes a slow speed stage, a medium speed stage, a variable speed stage and a high speed stage, the slow speed stage is a material distribution stage, the rotation speed of the centrifuge is 100-150r/min, the variable speed stage is specifically that a step is added every time 40-45r/min is added, the step is not stopped for 20-30s, the total variable speed time is 100-120s, and the medium speed stage is 0.7 times of the high speed stage.
In addition, the step of the normal pressure steam curing comprises a temperature rise period, a constant temperature period and a temperature reduction period, wherein the temperature in the temperature rise period is 20-25 ℃ per hour, the time is 3-4 hours, the highest temperature is 80-90 ℃, the temperature in the constant temperature period is 80-90 ℃ and the time is 4-6 hours, and the temperature in the temperature reduction period is 35-40 ℃ per hour until the room temperature is reduced.
The constant temperature period is the continuous development and consolidation stage of the concrete strength. The hardening speed of the concrete during constant temperature curing depends on the variety of the cement, the water cement ratio and the constant temperature. Under the condition of the same water cement ratio and constant temperature, the strength of the portland cement concrete is increased fastest, and the portland cement concrete is inferior to common cement concrete, and then slag cement concrete is added. The smaller the water cement ratio, the faster the concrete hardens and the shorter the required holding time. The constant temperature is different according to different cement varieties, portland cement is adopted, the constant temperature is not higher than 80 ℃, ordinary cement is not higher than 85 ℃, slag cement can be slightly higher, generally about 90 ℃, the constant temperature also depends on factors such as water-cement ratio and dry hardness of concrete, and the smaller the water-cement ratio is, the higher the constant temperature allowed by the dry hardness concrete is. Too high a constant temperature may damage the internal structure of the concrete, while too low a constant temperature may cause the strength of the concrete to increase slowly, and thus must be strictly controlled. Furthermore, the thermostating phase should maintain a relative humidity of 90% to 100% to ensure adequate hydration, the following table lists the thermostating time references:
according to the ultrahigh-strength steel fiber electric pole and the production process thereof, the hardening speed of cement is increased through normal-pressure steam curing, the turnover rate of a steel die is increased, the production period is shortened, and the production efficiency is improved. The normal pressure steam curing mode of the electric pole adopts a maintenance pit mode, has the advantages of simple equipment structure, convenient construction, less investment and quick response, can better adapt to the change of various electric pole varieties and specifications, can completely discharge water in reinforced concrete through centrifugal molding, and has the smallest internal and external layering and impact damage effects as possible, thereby ensuring the best concrete compactness.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A production process of an ultra-high strength steel fiber electric pole is characterized by comprising the following steps: the method comprises the following steps:
s1, mold cleaning and oil brushing: firstly, taking out the electric pole mould, cleaning residues on the inner wall of the electric pole mould, drying the interior of the electric pole mould after cleaning, and brushing oil on the surface of the inner wall of the electric pole mould;
s2, framework entering, adjusting and positioning: manufacturing an electric pole framework by using common steel bars, prestressed tendons, erecting rings and spiral tendons, putting the prepared electric pole framework into an electric pole mould, adjusting the position and fixing the electric pole framework;
s3 adding steel fiber concrete: adding the stirred steel fiber concrete into an electric pole mold, and tamping the interior of the electric pole mold through a vibrating tamper;
s4, die assembly and prestressed tendon tensioning: after the electric pole mould is assembled, tensioning the prestressed tendons by a tensioning machine;
s5 fixation and centrifugal molding: placing the matched electric pole mold into a centrifugal machine for fixing, and performing centrifugal molding;
s6, steaming at normal pressure: placing the centrifugally formed electric pole mould into a maintenance pit for steam curing, reserving a gap with the width of 0.2-0.5m between the electric pole mould and the pit wall, covering a pit cover, and sealing the space between the pit cover and the pit wall by adopting water injection;
s7, releasing tension and removing a mold of the prestressed tendon: after the prestressed tendons are released, the electric pole mold is dismantled;
s8, curing, forming, detecting and warehousing: and (5) carrying out regular watering maintenance for 3-5 days, wherein watering is carried out once a day, and detecting and warehousing after molding.
2. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the common steel bar is hot rolled steel bar, and the prestressed steel bar is high strength spiral rib steel wire, stress eliminating steel wire or heat treated steel bar.
3. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the diameter of the erecting ring is 6-10mm, the diameter of the spiral rib is 3.5-5mm, and the diameter of the main rib of the super-strength steel fiber electric pole is 10-20 mm.
4. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the diameter deviation of the erection rings is less than 1.5mm, the unevenness is less than 3mm, the distance between the erection rings is 500-1000mm, two erection rings are arranged at the joint end of the rod section, and the erection rings are bound with the main ribs.
5. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the steel bar processing step for manufacturing the electric pole framework comprises the following steps:
s1 rust removal: brushing iron rust on the steel bars completely by using a steel wire brush or a sand disc, or pickling;
s2 straightening: the steel bars with the diameter of less than 10mm are in a coiled state, and are subjected to the procedures of coiling and straightening before use, the steel bars with the diameter of more than 10mm are all cut into straight bars with the length of 8-9m in the rolling process, then straightening treatment is carried out, and straightening is carried out by adopting a straightener;
s3 blanking: and cutting off the steel bars by a manual cutting machine, keeping the cut smooth, wherein the length deviation of the common steel bars is +/-5 mm, the steel bars with different lengths are separately stacked, and the length deviation of the prestressed steel bars is within 0.3-0.5 mm.
6. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the reinforced concrete adopts cement, fine aggregate, coarse aggregate, broken stone and drinking water, the cement adopts Portland cement, common salt cement, slag Portland cement or sulfate-resistant Portland cement which are not less than 32.5, and the fine aggregate adopts natural river sand or medium sand; the maximum particle size of the broken stone is not more than 15mm, the ratio of drinking water to cement is 0.4-0.6, and the slump constant is 30-50 mm.
7. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the depth of the curing pit is 2.5-3.5 m.
8. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the centrifugal forming step comprises a slow speed stage, a medium speed stage, a variable speed stage and a high speed stage, wherein the slow speed stage is a material distribution stage, the rotating speed of the centrifugal machine is 150-.
9. The process for producing ultra-high strength steel fiber electric pole as recited in claim 1, wherein: the normal-pressure steam curing step comprises a temperature rise period, a constant temperature period and a temperature drop period, wherein the temperature of the temperature rise period is 20-25 ℃ per hour, the time is 3-4 hours, the highest temperature is 80-90 ℃, the temperature of the constant temperature period is 80-90 ℃, the time is 4-6 hours, and the temperature of the temperature drop period is 35-40 ℃ per hour until the room temperature is reduced.
10. An ultra-high strength steel fiber pole is characterized in that: an ultra-high strength steel fiber electric pole produced by a process comprising the production of an ultra-high strength steel fiber electric pole as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010633027.XA CN111702946A (en) | 2020-07-02 | 2020-07-02 | Ultrahigh-strength steel fiber electric pole and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010633027.XA CN111702946A (en) | 2020-07-02 | 2020-07-02 | Ultrahigh-strength steel fiber electric pole and production process thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214420B1 (en) * | 1985-08-02 | 1991-02-06 | Amedeo Carraro | Method for forming prestressed centrifugal piles and mould for implementing the method |
| CN1958261A (en) * | 2006-11-17 | 2007-05-09 | 河南省电力勘测设计院 | Method for manufacturing wire pole from steel fiber concrete with no bracing wire |
| CN106272954A (en) * | 2016-08-22 | 2017-01-04 | 福建坚石水泥制品有限公司 | One parts a little draws reinforced concrete pole processing technology |
-
2020
- 2020-07-02 CN CN202010633027.XA patent/CN111702946A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214420B1 (en) * | 1985-08-02 | 1991-02-06 | Amedeo Carraro | Method for forming prestressed centrifugal piles and mould for implementing the method |
| CN1958261A (en) * | 2006-11-17 | 2007-05-09 | 河南省电力勘测设计院 | Method for manufacturing wire pole from steel fiber concrete with no bracing wire |
| CN106272954A (en) * | 2016-08-22 | 2017-01-04 | 福建坚石水泥制品有限公司 | One parts a little draws reinforced concrete pole processing technology |
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