CN111300843A - Forming equipment and forming process for GFRP (glass fiber reinforced Polymer) tube layer of composite electric pole - Google Patents
Forming equipment and forming process for GFRP (glass fiber reinforced Polymer) tube layer of composite electric pole Download PDFInfo
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- CN111300843A CN111300843A CN202010242305.9A CN202010242305A CN111300843A CN 111300843 A CN111300843 A CN 111300843A CN 202010242305 A CN202010242305 A CN 202010242305A CN 111300843 A CN111300843 A CN 111300843A
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- air bag
- die
- glass fiber
- tube layer
- mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/766—Poles, masts, posts
Abstract
A forming device and a forming process of a GFRP tube layer of a composite electric pole belong to the technical field of overhead devices of power transmission lines of power systems and comprise a mold and an air bag; the die is sleeved outside the air bag; the air bag is a hollow closed cylindrical or conical bag body provided with a vent hole; after the air bag is filled with air, the outer wall of the air bag is pressed against the inner wall of the mold. Through the forming equipment and the forming process of the GFRP tube layer of the composite electric pole, the manufactured GFRP tube layer is smooth in inner and outer surface layers, uniform in stress and uniform in performance, and the glass fiber layers are tightly combined. The process adopts a steam curing forming mode, is environment-friendly and pollution-free, greatly reduces the production cost and only winds 1/5 parts of the pipe.
Description
Technical Field
The invention belongs to the technical field of overhead devices of power transmission lines of power systems, and particularly relates to equipment and a process for forming a GFRP (glass fiber reinforced Polymer) tube layer of a composite electric pole.
Background
The tower structure is an important special supporting structure in basic facilities such as power transmission, communication, railways, airports, municipal administration and the like, and the structural performance of the tower structure directly influences the safety, reliability and economy of a line. At present, electric poles used in domestic overhead transmission lines mainly comprise annular concrete electric poles, steel pipe concrete electric poles and composite material electric poles. The annular concrete electric pole is used in a large amount in power transmission lines of 35kV and below, and is also applied to certain areas of plains and hills with good 110kV line transportation and construction conditions. Steel pipes and steel pipe concrete poles are applied to construction and transformation of power grids with high voltage levels in urban areas in recent years. Composite poles have received increased attention from power systems and have been tried out on line engineering construction in a portion of special areas only in recent years.
The composite material electric pole is favored by the domestic and foreign electric power industry in recent years due to the advantages of light weight, high strength, corrosion resistance, high and low temperature resistance, good insulating property, lightning protection, pollution prevention and the like.
The traditional composite material electric pole mostly adopts a winding type production method, and the production method has the following defects that the composite material is ① anisotropic, the manufacturing cost of the composite material ② is high, and the selling price of a single electric pole is more than 5 times of that of a common concrete electric pole.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings and provide a forming device for GFRP tube layers of composite electric poles.
Another object of the present invention is to provide a process for forming GFRP tube layer of composite pole.
The forming equipment of the GFRP tube layer comprises a mould and an air bag; the die is sleeved outside the air bag; the air bag is a hollow closed cylindrical or conical bag body provided with a vent hole; after the air bag is filled with air, the outer wall of the air bag is pressed against the inner wall of the mold.
The die comprises an upper die and a lower die which are detachable; the upper die is covered on the lower die to form a hollow die; the inner wall of the die is cylindrical or conical.
Go up the mould long limit and the long limit of bed die all is provided with the fixed strip of evagination, align the fixed strip of last mould and the fixed strip of bed die after and with bolt fixed connection to mould lid is gone up in will closing and be fixed in the bed die.
The die is cylindrical or conical, and the outer wall of the die is provided with a radial reinforcing rib and an axial reinforcing rib which are perpendicular to each other; the radial reinforcing ribs are fixedly arranged on the outer wall of the mold in a circular ring shape; the axial reinforcing ribs are long strips fixedly arranged on the outer surface of the die and are parallel to the axis of the die.
The end part of the mould is fixedly provided with a stop strip; the blocking strips are arranged in a clearance mode; the vent pipe of the air bag penetrates through the gap between the stop strips.
The forming process of the GFRP tube layer of the composite electric pole comprises the following steps:
and 7, demolding: after the air in the bladder is vented, the upper mold is disassembled from the lower mold and the formed GFRP tube layer is removed.
In step 2, the preparation method of the gel coat comprises the following steps: adding a curing agent and an accelerant into the original gel coat and uniformly stirring to obtain the gel coat; according to parts by weight, curing agent: accelerator (b): original gel coat = 0.5-1: 0.3-1: 100.
in step 3, the preparation method of the resin glue solution comprises the following steps: mixing and uniformly stirring 100 parts of resin, 0.5-1 part of curing agent and 0.3-1 part of accelerator according to parts by weight to obtain a resin glue solution.
In step 7, locally performing interface treatment on the inner surface of the stripped GFRP tube layer: and (4) coating adhesive on the inner surface of the end part of the GFRP pipe layer and then blasting sand.
The wall thickness of the GFRP tube layer is 3-7 mm.
Through the forming equipment and the forming process of the GFRP tube layer of the composite electric pole, the manufactured GFRP tube layer is smooth in inner and outer surface layers, uniform in stress and uniform in performance, and the glass fiber layers are tightly combined. The process adopts a steam curing forming mode, is environment-friendly and pollution-free, greatly reduces the production cost and only winds 1/5 parts of the pipe.
Drawings
FIG. 1 is a schematic illustration of an explosive structure according to the present invention;
FIG. 2 is a schematic structural view of a mold;
FIG. 3 is a schematic structural view of a GFRP tube layer;
in the figure: the device comprises a die 1, an upper die 2, a lower die 3, a radial reinforcing rib 4, an axial reinforcing rib 5, a baffle strip 6, an air bag 7 and a vent hole 8.
Detailed Description
The present patent is described in further detail below with reference to the attached figures.
Definition of terms.
Composite material pole: the pole body is made of composite materials. In the scheme, the composite material refers to glass fiber reinforced plastic (commonly called glass fiber reinforced plastics).
Glass fiber reinforced plastics, and composite materials with glass fiber as a reinforcement and polymer as a matrix.
The ultra-high performance concrete composite pole with the thin-wall centrifugal GFRP pipe is a novel hollow GFRP pipe concrete composite structure pole (composite pole for short) formed by pouring ultra-high performance concrete inside a thin-wall glass fiber reinforced plastic pipe and performing centrifugal molding.
WALP forming process: the glass fiber cloth soaked with unsaturated resin matrix is placed in a forming mould, and the pipe is formed by expansion and compression of compressed air and heating and curing of hot steam.
Ultra-high performance concrete: the super-strong toughened concrete with C100 grade and above is produced by using active powder materials such as cement, mineral admixture and the like, fine aggregate, additive, high-strength fine steel fiber and/or organic synthetic fiber, water and the like. The international technology for preparing high-strength concrete (100MPa) is 'portland cement + silica fume + high-efficiency water reducing agent', which is the prior art, can be applied to the application and is not described any more.
The composite pole GFRP pipe layer is manufactured by WALP forming process, and is a composite material pipe formed by placing glass fiber single-diameter cloth soaked with unsaturated resin matrix in a forming die, and heating and curing the glass fiber single-diameter cloth by compressed air.
The wall thickness of the GFRP tube layer of the composite electric pole is 3-7 mm.
The forming equipment of the GFRP tube layer comprises a mould 1 and an air bag 7; the die 1 is sleeved outside the air bag 7; the air bag 7 is a hollow closed cylindrical or conical bag body provided with a vent hole 8; after the air bag 7 is filled with air, the outer wall of the air bag 7 is pressed against the inner wall of the mould 1.
The die 1 comprises an upper die 2 and a lower die 3 which are detachable; the upper die 2 is covered on the lower die 3 to form a hollow die 1; the inner wall of the mould 1 is cylindrical or conical.
The long edge of the upper die 2 and the long edge of the lower die 3 are both provided with convex fixing strips, and the fixing strips of the upper die 2 and the fixing strips of the lower die 3 are aligned and then fixedly connected through bolts, so that the upper die 2 is covered and fixed on the lower die 3. The bolts penetrate through the fixing strip of the upper die 2 and the fixing strip of the lower die 3.
The die 1 is cylindrical or conical, and the outer wall of the die is provided with a radial reinforcing rib 4 and an axial reinforcing rib 5 which are vertical to each other; the radial reinforcing ribs 4 are fixedly arranged on the outer wall of the die 1 in a circular ring shape; the axial reinforcing ribs 5 are long strips fixedly arranged on the outer surface of the die 1 and are parallel to the axis of the die 1.
A stop strip 6 is fixedly arranged at the end part of the mould 1; the stop bars 6 are arranged in a clearance mode. After the air bag 7 is placed in the mold 1, the stop strip 6 is used for stopping the air bag 7 and preventing the axial movement of the air bag 7. The vent tube of the air bag 7 passes through the gap between the stop strips 6.
The forming process of the GFRP tube layer of the composite electric pole comprises the following steps:
s1, fabric cutting: cutting the glass fiber cloth to ensure that the width of the glass fiber cloth is not less than half of the perimeter of the composite electric pole;
s2, cleaning the inner wall surface of the mold:
s2a, carrying out rust removal or impurity removal treatment on the surface of the inner wall of the die: polishing rusty spots and protruding places on the surface of the inner wall of the mold by using a polishing machine provided with a sand paper polishing sheet, and cleaning dust on the surface of the inner wall of the mold;
s2b, coating a release agent on the inner wall surface of the mold: after the mold is dried, a mold release agent is coated on the surface of the inner wall of the mold by a brush or clean cotton cloth in a coating mode, so that a wet film is formed on the surface of the inner wall of the mold, and after the mold is dried, the step of coating is repeated for 2-3 times;
preferably, the release agent is Lubekote 6505 available from Shanghai Lerey curettes Co., Ltd.
S2c, coating a gel coat on the inner wall surface of the mold, namely adding a curing agent and an accelerant into the original gel coat and uniformly stirring to obtain the gel coat; the gel coat is coated on the inner wall of the mold, so that the phenomenon of brush leakage cannot occur, particularly at the joint of the mold;
preferably, the original gel coat is isophthalic acid type gel coat resin; the curing agent is methyl ethyl ketone peroxide; the promoter is cobalt salt; according to parts by weight, curing agent: accelerator (b): original gel coat = 0.5-1: 0.3-1: 100.
s3, preparing the resin glue solution: mixing and uniformly stirring 100 parts of resin, 0.5-1 part of curing agent and 0.3-1 part of accelerator according to parts by weight to obtain a resin glue solution.
Preferably, the resin is m-benzene unsaturated polyester resin; the curing agent is methyl ethyl ketone peroxide; the promoter is cobalt salt.
S4, preparing the airbag 7: the air bag 7 is a flexible bag body provided with an air inlet channel;
fixing two ends of the air bag 7 and filling a proper amount of air into the air bag; and (3) coating a release agent on the surface of the air bag 7, wherein the release agent is uniform and has no omission during coating.
Preferably, the release agent is Lubekote 6505 available from Shanghai Lerey curettes Co., Ltd.
S5, scraping glue: spreading and horizontally placing the glass fiber cloth, scraping the prepared resin glue solution, sequentially overlapping the glass fiber cloth on the glass fiber cloth subjected to glue scraping, and scraping the glue; and putting the glass fiber cloth scraped with the glue solution into a lower die 3, and scraping by using a scraper and ensuring that the left side and the right side are flush with the joint.
S6, placing the airbag 7 on the lower mold 3, and superposing the glass fiber cloth right above the airbag 7: when the air bag 7 is placed into the lower die 3, one end of the air bag 7 is placed into the lower die, and then the whole air bag 7 is placed one by one; when the air bag 7 is placed, the air bag 7 is prevented from pressing and wrinkling the glass fiber cloth of the lower die 3; the glass cloth below the airbag 7 and the glass cloth above overlap each other at a joint.
Preferably, the width of the glass fiber cloth attached to the upper die 2 is half of the perimeter of the composite electric pole, and the width of the glass fiber cloth attached to the lower die 3 is 130-170 mm more than half of the perimeter of the composite electric pole.
S7, mold closing: slowly cover the mould with going up and close to the bed die, notice not need to extrude the fine cloth of glass when the compound die, will go up mould and bed die fixed connection after the compound die finishes.
After the mold is closed, the stop strip 6 is used for stopping the air bag 7 and preventing the axial movement of the air bag 7. The vent tube of the air bag 7 passes through the gap between the stop strips 6.
S8, heating and curing, and filling steam into the air bag, wherein the air pressure in the air bag is kept to be about 0.1-0.3 MPa all the time; the curing time is 45-60 min, and the glass fiber cloth forms a GFRP tube layer.
S9, demolding: after the air in the airbag 7 is vented, the upper mold 2 is detached from the lower mold 3, the upper mold 2 is lifted, the lower mold 3 is tilted, and the formed GFRP tube layer is taken out.
The GFRP tube layer manufactured by the equipment and the process has the advantages of light weight, high strength, small deformation, low manufacturing cost, corrosion resistance, ageing resistance, good electrical insulation and no potential safety operating hazard.
Table 1 summary of composite pole material properties.
The GFRP tube layer manufactured by the equipment has smooth inner and outer surface layers, uniform stress and uniform performance, and the glass fiber layers are tightly combined. The process adopts a steam curing forming mode, is environment-friendly and pollution-free, greatly reduces the production cost and only winds 1/5 parts of the winding pipe.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
- The forming equipment of the GFRP tube layer is characterized by comprising a die (1) and an air bag (7); the die (1) is sleeved outside the air bag (7); the air bag (7) is a hollow closed cylindrical or conical bag body provided with a vent hole (8); after the air bag (7) is filled with air, the outer wall of the air bag (7) is pressed against the inner wall of the mould (1).
- 2. The GFRP tube layer forming device according to claim 1, wherein the mold (1) comprises an upper mold (2) and a lower mold (3) which are detachable; the upper die (2) is covered on the lower die (3) to form a hollow die (1); the inner wall of the die (1) is cylindrical or conical.
- 3. The apparatus for forming a GFRP tube layer according to claim 2, wherein the upper mold (2) and the lower mold (3) are provided with protruding fixing strips at the long sides thereof, and the fixing strips of the upper mold (2) and the fixing strips of the lower mold (3) are aligned and then fixedly connected by bolts, so that the upper mold (2) is covered and fixed to the lower mold (3).
- 4. The GFRP tube layer forming apparatus according to claim 1 or 3, wherein the mold (1) has a cylindrical or conical shape, and the outer wall thereof is provided with a radial rib (4) and an axial rib (5) which are perpendicular to each other; the radial reinforcing ribs (4) are fixedly arranged on the outer wall of the die (1) in a circular ring shape; the axial reinforcing ribs (5) are long strips fixedly arranged on the outer surface of the die (1) and are parallel to the axis of the die (1).
- 5. The GFRP tube layer forming device according to claim 4, wherein the mold (1) is fixedly provided with a stop strip (6) at the end; the baffle strips (6) are arranged in a clearance way; the vent pipe of the air bag (7) penetrates through the gap between the stop strips (6).
- 6. The forming process of the GFRP tube layer of the composite electric pole by adopting the device as claimed in claim 2 comprises the following steps:step 1, fabric cutting: cutting the glass fiber cloth to ensure that the width of the glass fiber cloth is not less than half of the perimeter of the composite electric pole;step 2, cleaning the inner wall surface of the mold, coating a release agent on the inner wall surface of the mold, and coating a gel coat on the inner wall surface of the mold:step 3, glue scraping: spreading and horizontally placing the cut glass fiber cloth, scraping the glass fiber cloth with the prepared resin glue solution, sequentially overlapping the glass fiber cloth on the glass fiber cloth subjected to glue scraping, and scraping the glue; then putting the glass fiber cloth scraped with the glue solution into a lower die (3);and 4, placing an air bag (7): the air bag (7) is pre-filled with a proper amount of gas so that the air bag (7) just swells; placing the air bag (7) on the lower die (3), superposing the glass fiber cloth right above the air bag (7), and keeping the glass fiber cloth flat all the time; the glass fiber cloth below the air bag (7) and the glass fiber cloth above the air bag are mutually overlapped at the joint;step 5, die assembly: slowly covering the upper die (2) to the lower die (3), avoiding extruding the glass fiber cloth when die assembly is finished, and fixedly connecting the upper die (2) and the lower die (3) after die assembly is finished;step 6, heating and curing: filling steam into the air bag (7), and keeping the air pressure in the air bag (7) to be about 0.1-0.3 MPa all the time; curing for 45-60 min, and curing the superposed glass fiber cloth to form a GFRP tube layer;and 7, demolding: after the air in the air bag (7) is emptied, the upper die (2) is detached from the lower die (3), and the formed GFRP tube layer is taken out.
- 7. The forming process of the composite pole GFRP tube layer as claimed in claim 6, wherein in the step 2, the preparation method of the gel coat is as follows: adding a curing agent and an accelerant into the original gel coat and uniformly stirring to obtain the gel coat; according to parts by weight, curing agent: accelerator (b): original gel coat = 0.5-1: 0.3-1: 100.
- 8. the forming process of the composite pole GFRP tube layer as recited in claim 6, wherein in the step 3, the preparation method of the resin glue solution is as follows: mixing and uniformly stirring 100 parts of resin, 0.5-1 part of curing agent and 0.3-1 part of accelerator according to parts by weight to obtain a resin glue solution.
- 9. The forming process of the GFRP tube layer of the composite electric pole as claimed in claim 6, wherein in the step 7, the interface treatment is partially carried out on the inner surface of the GFRP tube layer after being demolded: and (4) coating adhesive on the inner surface of the end part of the GFRP pipe layer and then blasting sand.
- 10. The process for forming GFRP tube layer of composite pole according to claim 6, wherein the GFRP tube layer has a wall thickness of 3-7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242305.9A CN111300843A (en) | 2020-03-31 | 2020-03-31 | Forming equipment and forming process for GFRP (glass fiber reinforced Polymer) tube layer of composite electric pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242305.9A CN111300843A (en) | 2020-03-31 | 2020-03-31 | Forming equipment and forming process for GFRP (glass fiber reinforced Polymer) tube layer of composite electric pole |
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| Publication Number | Publication Date |
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| CN111300843A true CN111300843A (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010242305.9A Pending CN111300843A (en) | 2020-03-31 | 2020-03-31 | Forming equipment and forming process for GFRP (glass fiber reinforced Polymer) tube layer of composite electric pole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115352088A (en) * | 2022-10-21 | 2022-11-18 | 西安奥若特材料技术有限公司 | Composite pipeline forming integrated device with heating and pressurizing functions and process |
-
2020
- 2020-03-31 CN CN202010242305.9A patent/CN111300843A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115352088A (en) * | 2022-10-21 | 2022-11-18 | 西安奥若特材料技术有限公司 | Composite pipeline forming integrated device with heating and pressurizing functions and process |
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