EP0833728B1 - Erhärtungsvorrichtung für beton - Google Patents

Erhärtungsvorrichtung für beton Download PDF

Info

Publication number
EP0833728B1
EP0833728B1 EP96920920A EP96920920A EP0833728B1 EP 0833728 B1 EP0833728 B1 EP 0833728B1 EP 96920920 A EP96920920 A EP 96920920A EP 96920920 A EP96920920 A EP 96920920A EP 0833728 B1 EP0833728 B1 EP 0833728B1
Authority
EP
European Patent Office
Prior art keywords
enclosure
curing
carriers
pipes
pipe
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.)
Expired - Lifetime
Application number
EP96920920A
Other languages
English (en)
French (fr)
Other versions
EP0833728A1 (de
Inventor
Douglas Thomas Mullen
Alan Gregory Lane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shawcor Ltd
Original Assignee
Bredero Price Coaters Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bredero Price Coaters Ltd filed Critical Bredero Price Coaters Ltd
Publication of EP0833728A1 publication Critical patent/EP0833728A1/de
Application granted granted Critical
Publication of EP0833728B1 publication Critical patent/EP0833728B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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

Definitions

  • This invention is concerned with coating of pipes of the type used in subterranean or submerged pipelines for the recovery of oil, gas, slurries or the like pipeable materials from a subterranean well.
  • pipes in which a steel pipe section is coated with an anti corrosion coating and then a concrete aggregate anti-buoyancy coating (hereinafter referred to as a concrete coating).
  • Such pipes normally include a mechanical shear transfer device in the form of a wire winding or caging applied around the anti-corrosion coating prior to the application of the concrete coating. This opposes the tendency of the concrete coating to slip or jump off the anti-corrosion coated pipe during laying operations which can impose considerable bending stresses upon the pipe, leading to loss of coating integrity.
  • Pipe coating methods addressing the problems of effectively applying a concrete coating to a pipe treated with an anti-corrosion coating are described (without detailed discussion on curing of concrete), for example, in earlier patent publications including US-A-3 955 600, GB-A-1 504 051, GB-A-1 504 052, GB-B-2 088 992, GB-B-2 101 499, EP-B-0 380 474 and WO 94/26 426.
  • the teachings of these documents concerning application of concrete coatings to pipes are hereby incorporated by reference.
  • the aim of curing is to promote the proper hydration of the cement. This is accomplished by preventing moisture loss and, when necessary, by providing a controlled temperature environment. Moisture is a necessary ingredient in the curing process as hydration encompasses a multitude of chemical reactions between the water and the cement. These reactions produce highly complex calcium silicate and aluminate compounds, amongst others, which bind the aggregate in a hardened matrix.
  • the moisture content of the concrete is critical as hydration will cease if there is insufficient water to continue the reactions. Therefore the concrete coating must not be allowed to dry out prematurely.
  • the chemical reactions involved are overall exothermic so that heat is generated as the cement sets and gains strength. Therefore ambient temperature also affects the setting time and the rate of gain of strength. Hence setting time and strength gain may be accelerated by artificial heating. This can be achieved by placing the green, i.e. partially cured, concrete coated pipes in a saturated steam (wet steam) environment. This has the advantages of reducing setting time, reducing shrinkage and the tensile forces it causes within the concrete, and arresting moisture loss.
  • the apparatus for the curing of concrete coated pipes comprising a plurality of mobile pipe carriers, an insulated enclosure in which there is provided a controlled wet atmosphere maintained at an elevated temperature, said enclosure being sized to accommodate a multiplicity of pipes together with pipe carriers, and means for sequentially advancing said pipe carriers in continual succession through said insulated enclosure.
  • each carrier supports a plurality of pipes in a non-contiguous manner and arranged transversely to the length of the carrier.
  • a suitable number would be 3 or 4 pipes supported in parallel and lying across the carrier.
  • said carriers are rail guided vehicles and said means for sequentially advancing said pipe carriers comprises a circuit of rail tracks providing in parallel a first transport path for carriers loaded with pipes having a coating to be cured in the enclosure and a second transport path for return of empty carriers from which pipes have been removed following curing of the coating in said enclosure.
  • the second transport path may also pass through the enclosure so that the carriers remain close to the operating temperature of the curing enclosure. It will be understood that passing a succession of carriers outside the curing enclosure for a period of time may at some locations result in a substantial chilling of the carriers with respect to the operational temperature of the curing apparatus. Such chilled carriers upon return to the curing enclosure may introduce undesirable heat sinks and condensation points thus unduly disturbing the predetermined temperature profile of the curing enclosure requiring more energy input at the entry zone in said enclosure by way of compensation.
  • chambers at either end of said insulated enclosure to allow the entry and exit of said pipe carriers while maintaining the elevated temperature therein thereby mitigating potential heat losses and temperature gradients or fluctuations in the curing enclosure.
  • the elevated temperature is maintained by the presence of saturated steam within the insulated enclosure.
  • the mobile pipe carriers may be self-propelled remote-controlled vehicles having means for adjustment to provide adjustable support length and diameter to accommodate differing lengths and diameters of pipe, it is more economical to provide independent drive means arranged at either end of the enclosure to shunt undriven vehicles in succession as a train through the curing enclosure.
  • the most preferred arrangement provides for parallel tracks of paired rails and transfer sections, outwith the entry/exit chambers and the insulated enclosure, enabling cross-over between said tracks, a first track having a section passing through said entry/exit chambers and said insulated enclosure to allow a carrier to present at least one pipe for curing in said insulated enclosure before passing over a transfer section to allow that carrier to be returned for reloading on a second track.
  • the transfer section comprises a sliding section of track which is displaceable laterally at right angles to the track length or normal direction of travel to bring that section into correspondence with a second track parallel to the first track.
  • the second track may either pass through, at least partially though or outwith the insulated enclosure and entry/exit chambers.
  • pipe loading and offloading devices are provided adjacent to the entry and exit chambers to facilitate the loading and unloading of the carriers, together with support means to allow the concrete coated pipes to be stored prior to and after the elevated temperature curing operation.
  • Pipes are coated with an anti-buoyancy concrete coating typically of from about 40 mm - 150 mm thick and having a density of 2645 kg/m 3 based on Ilmenite.
  • the concrete coating density may be varied from 2165 to 3125 kg/m 3 by choosing appropriate mixtures of cement, sand and iron ore.
  • the coating is cured in accordance with the invention in a curing plant 5 illustrated generally in Fig. 1 wherein the layout of the curing plant is shown.
  • the plant 5 comprises a pre-curing area 10 dedicated to the marshalling of freshly coated pipes and their subsequent loading onto pipe carriers 15 , a curing hall 20 , and a post-curing area 25 dedicated to the removal of cured pipes from the carriers 15 and their storage.
  • Freshly coated (green) pipes (not shown) are delivered to the marshalling area 10 from the coating plant (also not shown). Upon arrival the pipes are allowed time to cure at the ambient temperature and this initial curing may take up to three hours. The pipes are then loaded, three at a time, onto the carriers 15 for accelerated curing in accordance with the invention.
  • the residence time within the curing hall is variable but 4 to 6 hours is considered adequate depending upon coating thickness.
  • the carriers 15 are supported on a pair of tracks, 30 and 30' , each comprising two rails.
  • the tracks run from the marshalling area 10, through the curing hall 20 and terminate in the post-curing area 25.
  • the first track 30 is used to convey loaded pipe carriers 15 from the marshalling area 10, through the curing hall 20, to the post-curing area.
  • the second track 30' is then used to transport the empty carriers 15 back to the marshalling area. Transfer sections, 35 and 35' , are provided to allow the carriers 15 to be swapped between tracks 30 and 30'.
  • the curing hall 20 is at least partially filled with saturated steam delivered at atmospheric pressure or slightly above in order to maintain conditions conducive to concrete curing.
  • the walls, 40 and 40' , and the roof of the hall 20 are insulated to prevent heat loss and hence control operating costs.
  • the steam filled section of the hall may be in the region of one hundred metres long and the laden pipe carriers 15 may take up to six hours to traverse the steam filled section.
  • the carrier 15 is composed of a rigid frame 45 manufactured from lengths of steel channel. Encapsulated within the frame 45 are four wheels 50 which allow the carrier 15 to move along rails (not shown) provided within the curing plant.
  • the frame 45 is surmounted by six concave bearing surfaces 55 which serve to support concrete coated pipes (not shown) while they are conveyed through the curing plant. The bearing surfaces may be interchanged to accommodate pipes of varying diameters.
  • This apparatus is intended to be fully automated and may be operated with confidence with minimal supervision from a central control room. Details of the automatic control systems are not essential to the understanding of the accelerated curing method and so are not described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (7)

  1. Verfahren zur Herstellung von betonbeschichteten Rohren, wobei eine Mehrzahl von Rohren aufeinanderfolgend zu beschichten ist, wobei jedes derartige Rohr um seine Längserstreckung während der Aufbringung einer gegen Aufschwimmen sichernden Betonbeschichtung gedreht wird, und wobei eine Mehrzahl von beweglichen Rohrträgern (15) vorgesehen ist, um die beschichteten Rohre während des Aushärtens des Betons zu stützen, wobei das Verfahren folgendes umfaßt: Stützen einer Mehrzahl von betonbeschichteten Rohren auf jedem beweglichen Rohrträger im wesentlichen parallel zueinander in einer nicht berührenden Weise und so angeordnet, daß sie quer über dem Träger transversal zu der vorgesehen Richtung der Bewegung des Trägers liegen, Liefern einer isolierenden Umschließung (20) und Herstellen von gesteuerten Zuständen darin, um zur Beschleunigung der Aushärtung des Betons zu führen, wobei die Zustände eine Naßatmosphäre umfassen, in der die Temperatur mit Bezug auf die hinsichtlich der Umschließung äußere Umgebungstemperatur angehoben ist, wobei die Umschließung solche Abmessungen besitzt, daß eine Vielzahl von Rohren zusammen mit Rohrträgern aufgenommen werden, Liefern von Einrichtungen (30, 30') zum aufeinanderfolgenden Voranbringen der Rohrträger in ununterbrochener Aufeinanderfolge durch die isolierte Umschließung, und Voranbringen der Rohrträger mit einer Voranbringrate, die eine Aufenthaltszeit ermöglicht, die ausreicht, um ein im wesentliche vollständiges Aushärten der Betonbeschichtung innerhalb der Umschließung zu erhalten.
  2. Verfahren nach Anspruch 1, wobei der Träger mit drei Rohren in einer nicht berührenden Weise beladen ist, angeordnet transversal zur Rohrlängserstreckung ist.
  3. Verfahren nach Anspruch 1 oder 2, wobei die Aufenthaltszeit zum beschleunigten Aushärten zwischen 4 und 6 Stunden liegt.
  4. Ein Verfahren nach einem der vorgehenden Ansprüche, wobei die angehobene Temperatur durch die Anwesenheit von gesättigtem Dampf innerhalb der isolierten Umschließung aufrechterhalten wird.
  5. Verfahren nach einem der Ansprüche 1 bis 4, wobei die Träger schienengeführte Fahrzeuge sind und die Einrichtungen, die für das aufeinanderfolgende Voranbringen der Rohrträger vorgesehen sind, einen Kreis von Schienenspuren umfaßt, die parallel zueinander einen ersten Transportweg für die mit Rohren beladen Träger liefert, welche eine in der Umschließung auszuhärtende Beschichtung besitzen, und einen zweiten Transportweg zum Zurückführen von leeren Trägern, von denen die Rohre nach dem Aushärten der Beschichtung in der Umschließung entfernt worden sind.
  6. Verfahren nach Anspruch 5, wobei der zweite Transportweg so angeordnet ist, daß er durch die Umschließung derart hindurchführt, daß die Träger nahe der Betriebstemperatur der Aushärtumschließung bleiben.
  7. Verfahren nach einem der vorgehenden Ansprüche, wobei Kammern an beiden Enden der isolierten Umschließung vorgesehen sind, um den Eintritt und den Austritt der Rohrträger zu erlauben, während die angehobene Temperatur darin aufrechterhalten wird, um dadurch potentielle Wärmeverluste und unerwünschte Temperaturgradienten oder Schwankungen in der aushärtenden Umschließung zu mildern.
EP96920920A 1995-06-20 1996-06-17 Erhärtungsvorrichtung für beton Expired - Lifetime EP0833728B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9512525 1995-06-20
GB9512525A GB2302402B (en) 1995-06-20 1995-06-20 Concrete curing apparatus
PCT/GB1996/001417 WO1997000764A1 (en) 1995-06-20 1996-06-17 Concrete curing apparatus

Publications (2)

Publication Number Publication Date
EP0833728A1 EP0833728A1 (de) 1998-04-08
EP0833728B1 true EP0833728B1 (de) 2000-10-04

Family

ID=10776350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96920920A Expired - Lifetime EP0833728B1 (de) 1995-06-20 1996-06-17 Erhärtungsvorrichtung für beton

Country Status (5)

Country Link
EP (1) EP0833728B1 (de)
DK (1) DK0833728T3 (de)
GB (1) GB2302402B (de)
NO (1) NO311835B1 (de)
WO (1) WO1997000764A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110630829A (zh) * 2019-09-18 2019-12-31 东北石油大学 装配式油气多相输送平腔智能保温管道结构及施工方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269522B (zh) * 2008-05-05 2010-04-14 中铁十一局集团有限公司 直排式全自动砼恒温保湿养护机
CN105583946A (zh) * 2016-02-19 2016-05-18 中国水利水电第十四工程局有限公司 一种预制t梁喷淋水养护系统
CN106863566A (zh) * 2017-03-07 2017-06-20 刘祥锦 预制砼构件的养护隧道
CN110883926B (zh) * 2019-12-06 2021-02-09 海油发展珠海管道工程有限公司 连续式海管配重混凝土涂敷及养护剂在线喷涂设备及方法
CN113070991B (zh) * 2021-04-09 2022-04-12 中电建路桥集团有限公司 混凝土养护箱

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248490A (en) * 1938-03-17 1941-07-08 Us Stoneware Co Method and apparatus for drying and truing up ceramic pipe
US2377480A (en) * 1941-05-23 1945-06-05 Turner & Newall Ltd Process for curing asbestos-cement pipes
GB682112A (en) * 1949-07-21 1952-11-05 Siporex Int Ab Improvements in and relating to the transmission of heat to products, such as moulded bodies, treated in closed steam chambers
GB754946A (en) * 1954-02-26 1956-08-15 Ensor & Company Ltd Improvements in methods of and means for drying clay-ware
AT289632B (de) * 1968-04-25 1971-04-26 Arloffer Thonwerke Gmbh Vorrichtung in Tunnelöfen zum Trocken und Brennen von Steinzeugrohren
GB1337014A (en) * 1972-01-14 1973-11-14 Kamco Systems Ltd Method and apparatus for co2curing of concrete
DE2216463C2 (de) * 1972-04-06 1974-01-31 Julius 8584 Kemnath Heinz Doppel-Tunnelofen zur Herstellung von Blähtonblöcken und Verfahren zum Betreiben des Ofens
US3873057A (en) * 1973-07-11 1975-03-25 Brown & Root Apparatus for weight coating pipe segments
GB1601534A (en) * 1978-05-24 1981-10-28 Wauhop B J Method of curing concrete articles
DE3132373A1 (de) * 1981-01-16 1982-07-29 Didier Engineering Gmbh, 4300 Essen Ofen zum erwaermen von brammen, knueppeln und rohlingen
US4798698A (en) * 1986-04-17 1989-01-17 Joelson Carl R Closed loop system for the manufacture and handling of concrete pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110630829A (zh) * 2019-09-18 2019-12-31 东北石油大学 装配式油气多相输送平腔智能保温管道结构及施工方法

Also Published As

Publication number Publication date
NO976051D0 (no) 1997-12-22
EP0833728A1 (de) 1998-04-08
GB9512525D0 (en) 1995-08-23
DK0833728T3 (da) 2000-11-20
NO311835B1 (no) 2002-02-04
GB2302402B (en) 1999-10-13
NO976051L (no) 1998-02-20
GB2302402A (en) 1997-01-15
WO1997000764A1 (en) 1997-01-09

Similar Documents

Publication Publication Date Title
EP0833728B1 (de) Erhärtungsvorrichtung für beton
KR20140033356A (ko) 회전가능한 전달 섹션을 갖는 컨베이어 디바이스
US4201711A (en) Method of manufacturing prestressed construction elements in a long mould bed
US4496501A (en) Process and apparatus for the production of articles consisting of ceramic material
US6142772A (en) Movable tunnel kiln for making clay products and a system with the tunnel kiln
CN214644659U (zh) 一种预制t梁流水线
CN106567565A (zh) 超长库板的安装方法
US3545733A (en) Kiln for heat treatment of articles on a continuous basis
EP0729403A1 (de) Vorrichtung zur beschichtung von rohren
US3997639A (en) Method for weight coating pipe segments
JPS627288B2 (de)
CN116771983B (zh) 管道转运装置及其施工方法
JPWO1996012572A1 (ja) スラブ供給ヤード
US3830625A (en) Method and apparatus for fast firing glazed ceramic tile trim
EP0005940B1 (de) Verfahren, Ofen und Anlage zum Brennen keramischer Produkte
NO904674D0 (no) Fremgangsmaate og innretning for fremstilling av mineralullbaner.
US3884619A (en) Method for fast firing glazed ceramic tile trim pieces
RU2104254C1 (ru) Способ изготовления пористой керамики "редоксид" и технологическая линия для его осуществления
WO1993016342A1 (en) Thermal process wherein the charge is rotated along into longitudinal axis
US1403440A (en) Drier for use in the manufacture of articles from tender clay
US4083119A (en) Roller dryer for clay pipe
US1835158A (en) Making cementitious articles
DE3147582A1 (de) Verfahren und vorrichtung zum trocknen von ziegeln auf brennwagen
SU1652065A1 (ru) Технологическа лини дл изготовлени железобетонных изделий
US3325870A (en) Article handling and treating system for block making

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980119

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DK FR IT NL

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BREDERO PRICE COATERS LIMITED

17Q First examination report despatched

Effective date: 19990917

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LANE, ALAN, GREGORY

Inventor name: MULLEN, DOUGLAS, THOMAS

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RBV Designated contracting states (corrected)

Designated state(s): DK FR IT NL

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DK FR IT NL

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
NLS Nl: assignments of ep-patents

Owner name: SHAWCOR LTD.

Effective date: 20080617

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090617

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20110616

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20150625

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20150623

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20150630

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20150625

Year of fee payment: 20

REG Reference to a national code

Ref country code: DK

Ref legal event code: EUP

Effective date: 20160617

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20160616