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WO1989000917A1 - Element tubulaire renforce par des fibres et procede pour sa fabrication - Google Patents

Element tubulaire renforce par des fibres et procede pour sa fabrication Download PDF

Info

Publication number
WO1989000917A1
WO1989000917A1 PCT/FI1988/000121 FI8800121W WO8900917A1 WO 1989000917 A1 WO1989000917 A1 WO 1989000917A1 FI 8800121 W FI8800121 W FI 8800121W WO 8900917 A1 WO8900917 A1 WO 8900917A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
tube element
reinforcement layer
layer
reinforcement
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.)
Ceased
Application number
PCT/FI1988/000121
Other languages
English (en)
Inventor
Olof Sundell
Rolf JERNSTRÖM
Reijo Fredlund
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.)
NETTEC Oy AB
Original Assignee
NETTEC Oy AB
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 NETTEC Oy AB filed Critical NETTEC Oy AB
Publication of WO1989000917A1 publication Critical patent/WO1989000917A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/583—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features
    • B29C53/585—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features the cross-section varying along their axis, e.g. tapered, with ribs, or threads, with socket-ends
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
    • B29C53/805—Applying axial reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • 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

Definitions

  • the present invention relates to a fibre re- inforced tube element, especially a pole, provided with a wall constructed of a reinforcement layer heli ⁇ cally and partially overlappingly wound around a longitudinal axis of the tube element, which layer consists of reinforcement fibre yarns extending in an axial direction of the tube element and being embedded in a hardened plastic material.
  • fibre re ⁇ inforced tube elements such as tube culverts, flag staffs and the like, the wall of which is constructed of a reinforcement layer consisting of reinforcement fibre yarns extending in the axial direction of the tube element and being embedded in a hardened plastic material.
  • the inside of the tube element can be en ⁇ tirely or partially filled with a core, on which the reinforcement layer is stationarily arranged.
  • US-Patent 4 089 719 (Fl-Patent 56 502) dis ⁇ closes a device and describes a method for the manu ⁇ facture of tube elements by winding a mat of rein ⁇ forcement yarns helically and partially overlappingly around a core in order to form a tubular reinforcement layer.
  • the reinforcement yarns are embedded in a hard- enable plastic material so that after the hardening of the reinforcement layer a continuous reinforced wall of even thickness is obtained for the tube element.
  • the thickness of the reinforcement layer must be chosen according to the maximum wall thickness required by the tube ele- ment in order to be able to withstand the bending strains such a pole will be subjected to.
  • the maximum bending strength is required at the section of the tube element situated immediately above the ground surface when the pole is erected in its place. The need of bending strength decreases thereafter grad ⁇ ually towards each end of the tube element.
  • US-Patent 3 820 573 to construct a tube blank with a conical wall of even thickness, so that the maximum cross section and the maximum bending strength are achieved at a desired section of the tube blank.
  • the reinforcement layer is arranged on a conical core, which remains under the reinforcement layer.
  • a substantial disadvantage of a tube element manufactured by means of such a method is that the re ⁇ quirement for conicity makes it impossible to manufac- ture tube elements continuously in endless succession.
  • Each particular tube element must instead be manufac ⁇ tured on separate conical cores, the length and coni ⁇ city of which are adapted to the purpose of use.
  • a further disadvantage of a conical tube ele- ment used as a pole for distribution of electricity or for telecommunication is that it will be more diffi ⁇ cult to use pole climbers meant for normal cylindrical wooden poles and impossible to utilize components and other equipments developed for cylindrical poles.
  • the intention of the present invention is to provide a tube element avoiding the disadvantages men ⁇ tioned above and having a desired variable wall thick ⁇ ness, though the wall has a substantially cylindrical basic form. This is achieved by means of a tube ele ⁇ ment, characterized in that the reinforcement layer is wound with variable relative overlapping so that the reinforcement layer overlaps more in areas of the tube element requiring a greater bending strength than in areas requiring a smaller bending strength.
  • the invention is based on the idea that it is possible to change the bending strength of the wall and to maintain at the same time the cylindrical basic form of the tube element by varying the overlap of the reinforcement layer.
  • the tube element of the invention is especially suitable to be used as a pole for dis ⁇ tribution of electricity and for telecommunication, because the bending strength of the tube element is correct at desired sections of the pole and the tube element in spite of this has a practically cylindrical form, which again makes it possible to use pole climb ⁇ ers as well as accessories and equipments meant for cylindrical poles.
  • the reinforcement layer has a cylindrical inner surface and is arranged on a tubular core, preferably consisting of a heat insulat ⁇ ing material.
  • a tubular core preferably consisting of a heat insulat ⁇ ing material.
  • the invention also relates to a method of manu ⁇ facturing a fibre reinforced tube element, according to which method - around a core is helically wound a reinforce ⁇ ment layer partially overlappingly in an axial direc ⁇ tion of the core, which layer consists of reinforce ⁇ ment yarns extending in the axial direction, - the reinforcement layer is embedded in a har- denable plastic material, and
  • the method is characterized in that the rein ⁇ forcement layer is wound around the core with variable overlap so that the reinforcement layer is wound more overlappingly in areas of the tube element requiring a greater bending strength than in areas requiring a smaller bending strength.
  • the method is based on the idea that it is pos ⁇ sible to provide even a cylindrical core with a rein ⁇ forcement layer of variable wall thickness in a simple way by varying the overlap during the winding.
  • a cy- lindrical core makes it possible to continuously feed an endless core to have a reinforcement layer wound around the core and to provide in this way a con ⁇ tinuous process, in which the overlap is varied by changing the feeding speed and/or the rotary speed of the core depending on the bending strength required at separate sections of the core length. Consequently, it is possible to manufacture tube elements of different length in a continuous process.
  • Figure 1 shows an axial section of an embodi ⁇ ment of a tube element according to the invention
  • Figure 2 shows a cross section of the tube ele- ment along the line II-II in Figure 1
  • Figure 3 shows schematically an axial section of a portion of the wall of the tube element on an en ⁇ larged scale
  • Figure 4 shows schematically a process for the manufacture of a tube element by means of the method according to the invention.
  • Figures 1 and 2 show a tube element 1, the wall of which is formed of a helically wound reinforcement layer 2 and an underlying tubular core 3.
  • the reinforcement layer consists of an UV- durable polyester reinforced by glas fibres and the core consists of hard urethane.
  • the core 3 has a cylindrical outer mantle surface 3a and the reinforcement layer a cylindrical inner surface 2a, correspondingly.
  • the thickness of the reinforcement layer varies from one end of the tube element to the other so that the maximum wall thickness is achieved at a distance from one end of the tube element corresponding to the ground level, when the tube element is dug into the ground and the tube element is used as a pole for electric and tele ⁇ phone lines.
  • the wall thickness decreases gradually towards both ends.
  • the reinforcement layer 2 is constructed of overlapping turns 4 of substantially parallel reinforcement yarns wound helically around the core and extending in the axial direction of the tube element in the reinforcement layer.
  • the degree of overlap increases from the left to the right from 60 % to 90 % and decreases thereafter from 90 % to 50 %. Because the degree of overlap influences the bending strength of the reinforcement layer, the maximum bend ⁇ ing strength of the reinforcement layer will occur within the area A, where seven turns of reinforcement yarn in total are lying upon each other. At the area B for instance, only two turns of reinforcement yarn are lying upon each other, which decreases the bending strength correspondingly.
  • Figure 4 shows a manufacturing method utilizing a winding device disclosed in US-Patent 4 089 719.
  • a mat 5 consisting of parallel glass yarns 6 with spreaded ends is helically wound around a tubular core 3, which is fed in the axial di ⁇ rection, as indicated by the arrow C, with respect to the winding position of the mat, and rotated around its longitudinal axis, as indicated by the arrow D.
  • the mat of reinforcement yarn provides the core with overlapping turns 4, on which is poured or sprayed by means of nozzles 7 a hardenable plastic material 8, a polyester, which saturates the turns of reinforcement yarn.
  • the wound core thereafter passes through a heat ⁇ ing device 9 for hardening the plastic material and the reinforcement layer to form a finished tube ele ⁇ ment.
  • the variable overlap of the turns of reinforce ⁇ ment yarn shown in Figure 3 is provided simply by changing the feed speeding and/or the rotary speed of the core when winding around certain sections of the core so that the turns of reinforcement yarn overlap more in areas of the tube blank requiring a greater bending strength than in areas with a smaller bending strength.
  • This adjustment of the feeding and/or the rotary speed of the core is indicated by an adjusting element 10.
  • an internal support tube can be used for the core during the winding of the reinforcement layer or a solid core can be used. It is also possible to wind the reinforcement layer detachably around the core and to remove the core after hardening or to dis- place the reinforcement layer from the core in the manner referred to in US-Patent 4 089 719.
  • the drawing and the description attached there ⁇ to are only intended to visualize the idea of the in- vention.
  • the tube element and the method for its manufacture can vary within the scope of the claims.
  • the fibre mat used for the reinforce ⁇ ment layer is provided with such a number of longi ⁇ tudinal supporting yarns that the transverse fibre yarns in the mat obtain a sufficient support during the winding and that the finished reinforcement layer achieves the strength desired in the peripheral direc ⁇ tion of the layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

La présente invention se rapporte à un élément tubulaire renforcé par des fibres et à un procédé permettant sa fabrication. L'élément est pourvu d'une paroi constituée d'une couche de renforcement (2) enroulée avec des chevauchements hélicoïdaux et partiaux autour d'un axe longitudinal de l'élément tubulaire (1). Cette couche se compose de fils de fibres de renforcement qui s'étendent dans une direction axiale de l'élément tubulaire et qui sont incorporés dans une matière plastique durcie (8). Pour faire en sorte que l'élément tubulaire présente différentes épaisseurs de parois et différentes résistances à la flexion dans des sections séparées de l'élément tubulaire, les spires (4) du fil de la couche de renforcement sont enroulées avec des chevauchements variables, la couche de renforcement comportant un nombre de chevauchements supérieur dans les zones (A) de l'élément tubulaire nécessitant une plus grande résistance à la flexion par rapport aux zones (B) nécessitant une résistance à la flexion moindre.
PCT/FI1988/000121 1987-07-28 1988-07-25 Element tubulaire renforce par des fibres et procede pour sa fabrication Ceased WO1989000917A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI873285A FI873285L (fi) 1987-07-28 1987-07-28 Fiberarmerat roerelement och foerfarande foer dess tillverkning.
FI873285 1987-07-28

Publications (1)

Publication Number Publication Date
WO1989000917A1 true WO1989000917A1 (fr) 1989-02-09

Family

ID=8524838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000121 Ceased WO1989000917A1 (fr) 1987-07-28 1988-07-25 Element tubulaire renforce par des fibres et procede pour sa fabrication

Country Status (3)

Country Link
AU (1) AU2135788A (fr)
FI (1) FI873285L (fr)
WO (1) WO1989000917A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678971A1 (fr) * 1991-07-08 1993-01-15 Andre Giraud Elements de structure composite transparents et leurs procedes de fabrication.
CH682843A5 (de) * 1990-03-20 1993-11-30 Oerlikon Buehrle Ag Keramikverbundrohr für Feuerwaffen und Verfahren zu dessen Herstellung.
WO1994026501A1 (fr) * 1993-05-10 1994-11-24 Faroex Ltd. Poteaux supports de lignes electriques
EP0624700A3 (fr) * 1993-05-14 1995-05-10 Tonen Corp Mât en béton et procédé pour son renforcement.
WO1998016376A1 (fr) * 1996-10-14 1998-04-23 Danomast Gt Glasfiber A/S Poteau et son procede de fabrication
GB2486328A (en) * 2010-12-03 2012-06-13 Magma Global Ltd Composite pipe
CN106285159A (zh) * 2016-08-30 2017-01-04 北京玻钢院复合材料有限公司 复合材料电杆及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002534A (en) * 1956-10-29 1961-10-03 Reinhold Engineering & Plastic Reinforced thermoplastics
US3788918A (en) * 1970-12-15 1974-01-29 P Poulsen Method for the continuous production of fiber reinforced plastic pipes of variable wall thickness
US3820573A (en) * 1971-06-22 1974-06-28 Shakespeare Co Tubular laminate and a method of making a tubular laminate
US4089719A (en) * 1975-12-31 1978-05-16 Olof Sundell Method and apparatus for feeding reinforcing strand when making a tubular product
US4247258A (en) * 1978-11-13 1981-01-27 United Technologies Corporation Composite wind turbine blade

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002534A (en) * 1956-10-29 1961-10-03 Reinhold Engineering & Plastic Reinforced thermoplastics
US3788918A (en) * 1970-12-15 1974-01-29 P Poulsen Method for the continuous production of fiber reinforced plastic pipes of variable wall thickness
US3820573A (en) * 1971-06-22 1974-06-28 Shakespeare Co Tubular laminate and a method of making a tubular laminate
US4089719A (en) * 1975-12-31 1978-05-16 Olof Sundell Method and apparatus for feeding reinforcing strand when making a tubular product
US4247258A (en) * 1978-11-13 1981-01-27 United Technologies Corporation Composite wind turbine blade

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH682843A5 (de) * 1990-03-20 1993-11-30 Oerlikon Buehrle Ag Keramikverbundrohr für Feuerwaffen und Verfahren zu dessen Herstellung.
FR2678971A1 (fr) * 1991-07-08 1993-01-15 Andre Giraud Elements de structure composite transparents et leurs procedes de fabrication.
WO1993001372A1 (fr) * 1991-07-08 1993-01-21 Compagnie Generale D'innovation Et De Developpement Elements de structure composite transparents et leurs procedes de fabrication
WO1994026501A1 (fr) * 1993-05-10 1994-11-24 Faroex Ltd. Poteaux supports de lignes electriques
EP0624700A3 (fr) * 1993-05-14 1995-05-10 Tonen Corp Mât en béton et procédé pour son renforcement.
US5542229A (en) * 1993-05-14 1996-08-06 Tonen Corporation Concrete pole and method of reinforcing same
WO1998016376A1 (fr) * 1996-10-14 1998-04-23 Danomast Gt Glasfiber A/S Poteau et son procede de fabrication
GB2486328A (en) * 2010-12-03 2012-06-13 Magma Global Ltd Composite pipe
GB2486328B (en) * 2010-12-03 2016-03-02 Magma Global Ltd Composite pipe
CN106285159A (zh) * 2016-08-30 2017-01-04 北京玻钢院复合材料有限公司 复合材料电杆及其制备方法

Also Published As

Publication number Publication date
FI873285A7 (fi) 1989-01-29
FI873285A0 (fi) 1987-07-28
FI873285L (fi) 1989-01-29
AU2135788A (en) 1989-03-01

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