EP2729286A1 - Vibrating finishing plate technology - Google Patents
Vibrating finishing plate technologyInfo
- Publication number
- EP2729286A1 EP2729286A1 EP20120807966 EP12807966A EP2729286A1 EP 2729286 A1 EP2729286 A1 EP 2729286A1 EP 20120807966 EP20120807966 EP 20120807966 EP 12807966 A EP12807966 A EP 12807966A EP 2729286 A1 EP2729286 A1 EP 2729286A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- concrete
- coating
- impinged
- finishing
- Prior art date
- 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.)
- Granted
Links
- 238000005516 engineering process Methods 0.000 title description 2
- 239000011248 coating agent Substances 0.000 claims abstract description 98
- 238000000576 coating method Methods 0.000 claims abstract description 98
- 238000000034 method Methods 0.000 claims abstract description 50
- 230000008569 process Effects 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007373 indentation Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 238000005029 sieve analysis Methods 0.000 description 2
- GGMMWVHTLAENAS-UHFFFAOYSA-M (1,1-diethylpyrrolidin-1-ium-3-yl) 2-hydroxy-2,2-diphenylacetate;bromide Chemical compound [Br-].C1[N+](CC)(CC)CCC1OC(=O)C(O)(C=1C=CC=CC=1)C1=CC=CC=C1 GGMMWVHTLAENAS-UHFFFAOYSA-M 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0038—Machines or methods for applying the material to surfaces to form a permanent layer thereon lining the outer wall of hollow objects, e.g. pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/021—Apparatus for spreading or distributing liquids or other fluent materials already applied to the surface of an elongated body, e.g. a wire, a tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
Definitions
- the invention relates to a device and a method for vibrationally finishing an impinged concrete coating on a pipe, and a pipe having a smoothened concrete coating.
- an impingement process is used for offshore concrete coating of a pipe.
- the process involves batched material passing through two large rubberized rollers at high speed to build up the required concrete thickness on the pipe.
- the impingement process creates a surface which is uneven (non-uniform), rough and undulating due to a number of reasons, including layer overlap, variations in the mass of the feed delivered to the rollers, rebound and surface fall- off.
- Decreasing the variation in surface profile can allow for a reduction in concrete thickness or the application of concrete which has a higher density - either the mass of concrete or the amount of iron ore in the concrete can be decreased to obtain the desired negative buoyancies.
- the non-uniform surface formed from an impinged concrete coated pipe leads to dust generation during the process of laying the pipe.
- the impinged concrete surfaces shed a significant amount of fine concrete material because the outer layers are friable. According to a marketing survey, it costs lay barge operators about $2 million annually to remove detritus generated by impinged concrete. Concrete which has a smoother and denser surface will generate less detritus and reduce disposal costs for lay barge operators.
- the smoothening of pipes can have a tertiary benefit which is the reduction of the coefficient of friction between the pipe and the seabed. In some instances, problems have been reported when the friction between the pipes and the seabed can lead to significant dust generation.
- the invention relates to a pipe coating finishing device comprising :
- a scraper coupled to a first arm for engaging a pipe to remove material in excess of a maximum pipe diameter
- the invention relates to a process for finishing an impinged concrete coating on a pipe with a device having a frame containing a first arm, a second arm, a scraper coupled to a first arm and a vibrating plate coupled to a second arm, the process comprising the steps of:
- the invention in a further aspect relates to a concrete coated pipe having a pipe and a concrete coating on the pipe; and wherein the concrete coated pipe has an average depth of indentation measured on the coating of ⁇ 5 mm .
- Figure 1 shows a front elevational schematic view of an embodiment of the device according to the invention
- Figure 2 shows a perspective schematic view from the vibrating plate side of an embodiment of the device according to the invention
- Figure 3 shows a perspective view from the scraper side of an embodiment of the device according to the invention.
- Figure 4 shows a top view of an embodiment of the device according to the invention.
- Figure 5 shows a side elevational view of an embodiment of the device according to the invention.
- Figure 6 shows a perspective view of a set-up of a vibrational finishing plate device according to another embodiment of the invention
- Figure 7 shows a picture of a impinged concrete coated pipe undergoing a vibrationally finishing plate process according to the invention
- Figure 8 shows an electric vibrator having eccentric weights used in an embodiment according to the invention
- Figure 9 shows a close-up picture of a pipe showing the surface of an impinged concrete coated pipe along with a vibrationally finished concrete coated pipe after undergoing the process according to an embodiment of the invention
- Figure 10 shows another close-up picture of a pipe showing the surface of an impinged concrete coated pipe along with a vibrationally finished concrete coated pipe after undergoing the process according to an embodiment of the invention
- Figure 11 shows a picture of a surface of a vibrationally finishing concrete coated pipe after undergoing through the process according to the invention
- Figure 12 shows the iron ore sieve analysis used in coating the pipe in accordance with the process of the invention
- Figure 13 discloses the profile of test pipes after finishing with a vibrating finishing plate (VFP) device used in accordance with the process of the invention
- Figure 14 discloses the outer diameter (OD) profile of pipe M lbefore and after undergoing the process according to the invention
- Figure 15 discloses the outer diameter (OD) profile of pipe Gl before and after undergoing the process according to the invention
- Figure 16 discloses the densities and thickness of various pipes having an impinged concrete coating
- Figure 17 a front elevational schematic view of another embodiment of the device according to the invention.
- Figure 18 a top elevational schematic view of another embodiment of the device according to the invention.
- Figure 19 a front elevational schematic view of a further embodiment of the device according to the invention.
- Figure 20 a front elevational schematic view of another further embodiment of the device according to the invention.
- the invention relates to a pipe coating finishing device (1), a process for finishing an impinged concrete coating (32) on a pipe (12) with the pipe coating finishing device (1), and a pipe (12) having a smoothened concrete coating.
- Figures 1-7 show a pipe coating finishing device (1) that contains a frame (2) having a first arm (4) and a second arm (6). Coupled to the first arm (4) at the pipe end of the first arm (10) is a scraper (8), which is used to remove any impinged concrete coating material that exceeds a pre-set maximum concrete coated pipe diameter. While the second arm (6) is coupled to a vibrating plate (14) at the pipe end of the second arm (16), for compacting an impinged concrete coating on the pipe (32). As shown in figures 1-5, both the first arm (4) and the second arm (6) are coupled to a single frame (2) structure.
- first arm (4) is coupled to a first frame structure (not shown) and the second arm (6) is coupled to a second frame (2) structure (shown in figures 16-20).
- first frame (4) is coupled to a first frame structure (not shown)
- second arm (6) is coupled to a second frame (2) structure (shown in figures 16-20).
- such embodiments are intended to be covered by the frame (2) and the first arm (4) and the second arm (6), disclosed herein.
- the vibrating plate (14) used in the device (1) is able to vibrate at sufficiently high frequency and apply sufficient pressure to compact the impinged concrete coating on the pipe (32).
- the vibrating plate (14) has a convex surface that faces away from the pipe and a concave surface (22) that faces the impinged concrete coated pipe (32).
- the concave surface (22) of the vibrating plate (14) has a radius of curvature to allow nearly the entire concave surface (22) to contact the outer surface of the impinged concrete coated pipe (32).
- Such a concave structure can assist in uniformly compacting and finishing the impinged concrete coating on the pipe.
- the vibrating plate (14) is provided with a vibrator (18) ( Figures 1, 2, 8 and 16-20), which permits the vibrating plate (14) to vibrate at a desired frequency.
- the vibrating plate (14) vibrates at a frequency from about 1500 to about 18000 vpm .
- the vibrating plate vibrates at a frequency from about 3500 to about 12000 vpm .
- the vibrating plate (14) vibrates at a frequency from about 6500 to about 9000 vpm .
- the vibrating plate (14) vibrates at a frequency of about 3000 vpm .
- the vibrating plate (14) applies a static pressure on the impinged concrete coated pipe (32) to compact and provide finishing to the concrete coating.
- pressure can be applied by using weights (34) on the vibrating plate (14) (figures 19 and 20).
- pressure can be used by connecting the vibrating plate (14) to a hydraulic system (figures 16-18).
- the amount of pressure applied can also vary depending upon the properties of the coated concrete and the vibrating plate (14).
- the amount of static thrust force applied ranged from about 3 to about 200 psi.
- the amount of static thrust force applied ranged from about 75 to about 150 psi, and values in between.
- the amount of down force applied using about 3 to 6 bar of pressure ranged from about 4 to 12 kN .
- the vibrating plate (14) vibrates, the impinged concrete coating is compacted to obtain a smoothened surface.
- the size of the vibrating plate can vary depending upon pipe and the desired process. In one embodiment, for example and without limitation, the width of the vibrating plate (14) is such that any given area of the impinged concrete coating is compacted and finished at least twice by the vibrating plate (14). Other embodiments, where compacting and finishing on any given area is performed multiple times, such as, for example and without limitation, three, four, five or more, by the vibrating plate are also encompassed by the present invention. The number of times, compacting and finishing on any given area on the concrete coated pipe is performed can depend on the pipe dimensions, pipe line speed, pipe rotation.
- the linear speed of the pipe was 7.5 m/min and rotation was 20.69 rpm . Based on this, it was determined that the coating surface rotates at 1.49 revolutions under the area of the finishing plate.
- the edges of the vibrator plates are raised (20) (see Fig. 1 and 16-20).
- This provides a vibrator plate (14) with smoothened edges and also assists in producing a smoothened concrete coated pipe.
- Other variations of smoothened edges such as, for example and without limitation, rounded edges, are also encompassed by the present invention.
- the scraper (8) and the vibrating plate (14) are positioned on the pipe (12) to allow the scraper (8) to first contact the impinged concrete coating (32) on the pipe (12), so as to remove concrete that is in excess of a maximum concrete coated diameter.
- the positioning of the scraper (8) and the vibrating plate (14) on the impinged concrete coated pipe (32) can be such that both the scraper (8) and the vibrating plate (14) are positioned in-line along the length of the pipe (12).
- One possible way to achieve this, is to have the scrapper and the vibrating plates on separate frames, such as embodied in Figures 16-20.
- the impinged concrete coating and finishing process can also be carried out concurrently, so as to allow impingement of the pipe prior to scrapping and finishing the concrete coated pipe. In such a process, the pipe is rotated and moved along the length of the pipe while being impinged by a concrete coating.
- the vibrating plate (14) and the scraper (8) are positioned in-line along an axis perpendicular to the longitudinal axis of the pipe (12). Therefore, as the pipe (12) is impinged with a concrete coating, rotated and moved along the length of the pipe (12), it is also scrapped and finished to obtain a smoothened concrete coating on the pipe (12) ( Figures 1-6).
- the scraper (8) and the vibrating plate (14) can be positioned on the pipe (12) to be adjacent to each other, as shown in Figures 1-7.
- the scraper (8) is positioned below and the vibrating plate (14) is positioned above a plane
- the scraper (8) and the vibrating plate (12) are symmetrically positioned about the plane diametrically dissecting the pipe (12).
- the scraper (8) and vibrating plate (14) are positioned at an angle of about 30° measured from the pipe centre. However, other angles, such as about 20°, 25°, 35° or 40° may also be considered acceptable. While in the embodiments disclosed in Figures 16-20, the vibrating plate (14) and/or the scrapper (not shown) can lie in the plane that diametrically dissects the pipe (12), with the plane being normal to the ground surface.
- the step of impinging a concrete coating on the pipe (12) is not particularly limited.
- impingement of the concrete coating on the pipe (12) is carried out by use of impingement rollers.
- the impingement rollers can be positioned adjacent to the vibrating plate and/or the scraper.
- the scraper (8) used in accordance with the invention should be able to remove excess impinged concrete coating on the pipe (12) without damaging the concrete coating.
- the scraper (8) is provided with a first end plate (24), a second end plate (26) and a plurality of rods (28) connecting the first end plate (24) to the second end plate (26).
- the plurality of rods (28) extending from the first end plate (24) to the second end plate (26) can be positioned to extend along the length of the pipe (12), to allow scrapping the excess impinged concrete coating on the pipe (12), as the pipe (12) rotates and moves along the length of the pipe (12).
- the plurality of rods (28) can be so arranged that they together define a curved plane having a radius of curvature equal to the set maximum radius of the coated pipe (12).
- the process can be carried out a surface speed of the pipe (12) sufficient to adequately smoothen and finish the pipe (12).
- the surface speed of the pipe is from about 50 to about 100 meters/min, and values in between, such as, about 60, about 70, about 75 and about 80 meters/min.
- water can be applied during the process for finishing an impinged concrete coating on a pipe.
- the application of water can help with the scrapping step, the vibrational ⁇ finishing step, or both.
- the rate of water application in the process can vary. In one embodiment, for example, the rate of water application ranged from about 0.030 to 1.000 L/m 2 . In another embodiment, the rate of water application ranged from, for example, about 0.047 to 0.071 LJm 2 .
- concrete coated pipes having a smoothened profile were obtained. To evaluate the smoothness of the coating on the pipe, the average depth of indentation on the concrete coated pipes were measured.
- the average depth of the indentation measured on the coating was below 5 mm . In another embodiment, the average depth of the indentation measured on the coating ranged from, for example, about 2.5 to 4.96 mm. In a further embodiment, the average depth of the indentation measured on the coating ranged from about 3% to about 6.5%.
- the device and process according to the invention leads to a concrete coated pipe having a smoothened finished surface, as shown in figures 7 and 9-11.
- the amount of detritus generated can be significantly lowered, which can address some of the health and safety hazards associated with the impinged concrete coated pipes in present use.
- the pipes obtained using the process disclosed herein, generated about 200, 300, 400, 500%, 600% or 700%, and values in between, less detritus than that generated using an impinged concrete coated pipe.
- the pipes were 44 inches in diameter and had a wall thickness of 23.3 mm.
- the anticorrosion coating was 6 mm (modified) asphalt.
- Plastic spacers 65 mm
- Eight strands of fibrillated polypropylene twine were wrapped around the pipe to restrain the concrete and prevent disbondment or fall-off.
- the twine stands are typically positioned within the first 10 mm of the concrete surface and approximately 5 kg of tension was applied on each strand of twine.
- a concrete mixture with a target density of 3400 kg/m 3 and containing 550 kg/m 3 Portland cement was used.
- the range of moisture content acceptable for coating was 4.5 to 5.1%.
- the Portland cement was supplied by Norcem AS Norway, the magnetite from Minelco AB Sweden.
- the sieve analysis data for the aggregate is shown in Figure 12.
- the coating time and surface speed selected were 165 seconds and 72 meters/minute, respectively.
- the vibrating finishing plate used in this test program was 540 mm wide x 500 mm long. The width of the plate was based on the design criteria that any given area of the concrete surface would be compacted and finished twice by the vibrating finishing plate (VFP).
- Two Dynapac ER 305 electric vibrators were used ( Figure 8). Alternately, other vibrators such as VIBCO US-450T-230V can also be used.
- the vibrators were mounted parallel to each other on the plate at opposite ends of the plate ( Figure 6).
- the rotors in the vibrators operated at a fixed speed of 3000 rpm and the internal weights ( Figure 8) were set for the maximum force of 3000 Newtons.
- the vibrators were electrically connected such that the rotors inside the vibrator were counter rotating with respect to each other - one shaft rotated clockwise and the other anti-clockwise - this produced a reciprocating motion that was predominantly normal to the surface of the concrete.
- a 100 mm diameter pneumatic cylinder was used to apply a static pressure to the plate.
- the maximum pressure of 101.5 psi was used.
- the estimated static thrust force on the plate was 3 psi.
- the vibrating finishing plate was mounted just in front of the impingement rollers and in line with the scraper.
- the scraper and VFP contacted the pipe at approximately 28° before and after top-dead-center, respectively ( Figures 6 and 7).
- the VFP was evaluated by first coating the pipe without the VFP and measuring the outside diameter of the pipe via the optical OD measuring system. After the pipe was coated, manual measurements were immediately taken and recorded. The pipe was repositioned and passed through the HeviCote system again with a normal production surface speed of 72 meters/min . but with the VFP on the pipe running with maximum pressure and amplitude. Again, OD
- Figures 14 and 15 show the OD profiles before and after the VFP.
- the OD was reduced 3.2 and 1.4 mm for pipes M l and Gl, respectively.
- the OD was reduced by 1.9 and 1.3 mm.
- FIG. 11 illustrates the effect of finishing on the density of the (applied) concrete required to meet the target density on the pipe. Assuming a 50 mm concrete coating thickness and a target density of 3044 kg/m 3 , the density of the applied concrete for unfinished pipes must be at least 3300 kg/m 3 , and for finished pipe the density needs to be a minimum of 3167 kg/m 3 . Approximately 9% less iron ore (4800 kg/m 3 density) is needed per metric ton of concrete when the density is decreased from 3300 to 3167 kg/m 3 .
- a trial to mimic the handling a pipe will experience on a typical laybarge firing line was performed. This was done by repeatedly running the test pipes over a fixed set of rollers for a total of 20 passes. One pass is considered a movement of lm in the forward direction.
- the dust generated was collected by two sources, after the 20 passes. The smaller dust particles were sucked up via a large industrial vacuum whilst the heavier particles which were not captured by the vacuum fell onto a collection plate. The two dust collection sources were weighted and analyzed separately. Four tests were conducted on each pipe at the 12, 3, 6 and 9 o'clock positions on the pipe, VFP and impinged pipe, gathering a total of 80 passes, 20 passes per individual test.
- VFP can significantly improve the uniformity of the surface and thereby reduce the thickness of the concrete coating, without loss of material.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161504279P | 2011-07-04 | 2011-07-04 | |
PCT/CA2012/050452 WO2013003956A1 (en) | 2011-07-04 | 2012-07-03 | Vibrating finishing plate technology |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2729286A1 true EP2729286A1 (en) | 2014-05-14 |
EP2729286A4 EP2729286A4 (en) | 2015-05-13 |
EP2729286B1 EP2729286B1 (en) | 2019-12-18 |
Family
ID=47436418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12807966.2A Active EP2729286B1 (en) | 2011-07-04 | 2012-07-03 | Vibrating finishing plate technology |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2729286B1 (en) |
AU (1) | AU2012278893B2 (en) |
MY (1) | MY171980A (en) |
WO (1) | WO2013003956A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104960084B (en) * | 2015-07-22 | 2017-03-08 | 新兴铸管股份有限公司 | External wrapping concrete ductile iron pipe producing device |
WO2021007674A1 (en) * | 2019-07-16 | 2021-01-21 | Shawcor Ltd. | Surface coating for concrete coated pipeline |
CN111805722B (en) * | 2020-06-05 | 2022-09-06 | 山东蓝盟防腐科技股份有限公司 | Automatic cement device of wrapping up in fast of oyster rod |
CN116510972B (en) * | 2023-04-26 | 2023-11-07 | 苏州伟志水处理设备有限公司 | Water treatment separation membrane processing equipment |
CN117772476A (en) * | 2024-02-28 | 2024-03-29 | 西安热工研究院有限公司 | A smooth device for bank of tubes outer wall coating |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1120966B (en) * | 1960-07-11 | 1961-12-28 | Schlosser & Co G M B H | Device for smoothing the inner walls of concrete pipes |
SU494558A1 (en) * | 1973-08-14 | 1975-12-05 | Днепровский Заводостроительный Комбинат | Device for applying protective coatings on the inner surface of pipes |
FR2315374A1 (en) * | 1975-06-25 | 1977-01-21 | Mosser Andre | Smooth concrete lining application on concrete pipes - uses vibrating screed which follows hopper with concrete flow control |
FR2427187A1 (en) * | 1978-06-02 | 1979-12-28 | Pont A Mousson | Cement coater for cylindrical pipe - has applicator shell with hopper, supported on carriage, and conveyed along horizontal rotating pipe |
US4437495A (en) * | 1980-09-20 | 1984-03-20 | University Of Surrey | Pipes and pipe coatings |
DE3305158A1 (en) * | 1983-02-15 | 1984-08-16 | Buderus Ag, 6330 Wetzlar | Apparatus for smoothing setting coatings of mortar on rotating tubes |
CA1216505A (en) * | 1983-08-26 | 1987-01-13 | James J. Stockman | Method and apparatus for applying a coating material to a pipe |
JPH08300340A (en) * | 1995-03-06 | 1996-11-19 | Takenaka Komuten Co Ltd | Method and apparatus for smoothing inner surface of centrifually molded hollow concrete product |
NZ545783A (en) * | 2003-10-08 | 2010-03-26 | James Hardie Int Finance Bv | A fibre reinforced cement column and method of forming on a lathe automatically adjusting for surface imperfections |
CN201189699Y (en) | 2008-03-07 | 2009-02-04 | 北京韩建集团有限公司 | PCCP mortar protection layer synchronous slicking device |
-
2012
- 2012-07-03 MY MYPI2013702543A patent/MY171980A/en unknown
- 2012-07-03 AU AU2012278893A patent/AU2012278893B2/en active Active
- 2012-07-03 WO PCT/CA2012/050452 patent/WO2013003956A1/en active Application Filing
- 2012-07-03 EP EP12807966.2A patent/EP2729286B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
AU2012278893A2 (en) | 2014-02-13 |
AU2012278893B2 (en) | 2017-12-07 |
EP2729286B1 (en) | 2019-12-18 |
AU2012278893A1 (en) | 2014-01-23 |
MY171980A (en) | 2019-11-11 |
WO2013003956A1 (en) | 2013-01-10 |
EP2729286A4 (en) | 2015-05-13 |
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