CN1120142A - High tensile strength composite reinforcing bands and methods for making same - Google Patents

Abstract

A helical composite material tape having loopy and high tensile intensity is made by the following steps: a plurality of successive fibers with high tensile intensity go through unsolidified resin in order to form a flat tape; the flat tape is attached to at least one adhesive tape whose surface is basically flat to form a laminated tape; the laminated tape is wound onto a mandrel to form a plurality of pressed loops; the resin in the composite material tape solidified to shape each loop to be helical; then the adhesive tape is denuded from the composite tape. The helical tape loop in the method having memories of basically flat surface and elasticity can be used to wind and strengthen an axially extending structure having internal force with an outward radial direction and keep every loop in place by adhesive layers while winding.

Description

The composite reinforcing bands of high tensile and manufacture method thereof

The present invention relates to field of compound material.More specifically, the present invention relates to the reinforcing strip and the manufacture method thereof of the spiral form made with composite material.

A large amount of pipe-line systems are used under pressure long apart from ground conveying gas or liquid.These pipelines can be corroded, and in some cases, owing to along the crackle that pipeline axial produces pipeline was lost efficacy too greatly with stressed at a high speed.For many years, existing many methods are repaired the part that pipeline corroded and are used for limiting plastic failure and brittle failure spreading in this pipeline.One of them method comprises that coiling that employing is made by the high tensile composite material brings and holds pipeline.Disclosed Canadian patent application No.2,028,254 has described and adopts these compoundly to bring the method for repairing and strengthening pipeline, and U.S. Patent No. 4, described in 700,752 and adopted these compound bringing to stop crackle with the method that spreads of restriction plastic failure in pipeline.The content that is disclosed in these two files is here drawn and is reference.

The compound strip that adopts in the said method is made of the continuous fiber that is sealed in the high tensile strength material in the resin matrix.The method that being used for of adopting so far made these compound strip has various shortcomings.In these class methods, the fiber of high tensile is the form that makes a band, and it has many horizontal filaments that each bar fiber is kept together, and transverse filament is held in place by many thermosols.A difficulty relevant with adopting this band is to hold and to seal fiber equably with one deck resin cladding.Another problem that adopts the method for these bands is that the heat relevant with curing with the gel of resin can make the thermosol bar melt, and stays many spaces of traversing compound strip.These spaces play a part conduit, water can be infiltered and etched fibre, thereby the compound strip time is weakened once long.

In order to overcome some this class difficulty, this case inventor just adopts the method for the individual fibers that connects without transverse filament to do experiment.Yet the inner and outer surface of the compound strip that the experimental technique of the employing individual fibers of having attempted so far produces is all uneven.That is in manufacture process, the tension force in the continuous fiber has made these compound strip that at random a series of peak portions and the paddy portion of extending along the compound strip length direction arranged on each surface.In the peak on the adjacent disc pitch of the laps of compound strip and paddy meeting mutual interference mutually when wanting in installation process, to make these circle radially aligneds, thereby make installation process more difficult.

Another problem relevant with the compound strip of these experiment manufacturings relates to the predetermined function of compound strip as a kind of structure reinforcer.Typically, in the installation that compound strip is held such as pipeline, along with compound strip is twined coating adhesive between the two adjacent rings of compound strip on pipeline.Scatter under the very high hydrodynamic pressure of compound strip when these pipeline proper functioning that Bond is used for preventing to twine.Yet,, run into and some relevant problems of these Bonds of employing for installing around in these compound strip that are used on the simulation pipeline of test objective.These problems comprise and as one man form enough adhesion strengths between the two adjacent rings that is difficult in compound strip all the time and be difficult to reach enough rapidly and consistent adhesive cures speed.Another problem is can not obtain extremely thin and uniform adhesive layer is acted on by " cushion " that adhesive layer was caused between the compound strip two adjacent rings reducing as far as possible.

Therefore, be necessary to improve continuous high tensile strength fiber is included in the technological method of making the high tensile compound strip in a kind of resin matrix.And compound strip need installed around the method that can form firm bonding when strengthening a structure regularly between the two adjacent rings in these compound strip.

The present invention is devoted to satisfy these needs just.

Have been found that, adopting inhomogeneous adhesion strength between each circle of experiment compound strip of individual fibers is not to be by causing in that these compound strip are installed around the Bond that spreads in the configuration process, but cause on the up-and-down surface that forms when being made by these compound strip.When installing around compound strip, peak on the adjacent two layers and paddy may be aimed at by different way.A kind of situation is, the apparent surface of adjacent two layers is in " homophase ", and promptly the peak on one deck engages in the paddy on the adjacent layer, thereby forms continuous contact between this two-layer facing surfaces.Another kind of situation is, two surfaces are in " out-phase ", and promptly the peak on one deck is aimed at the peak on the adjacent layer, thereby this two-layer apparent surface only is in contact with one another at Feng Chu, and locates between this two surface very big distance is being arranged on every side in paddy.Because peak and paddy are random distribution on each layer, all peaks on possible hardly lip-deep all peaks and paddy and the apparent surface and paddy is homophase or out-phase all.Most possible state is, relative two more lip-deep peaks and paddy are homophases, and the paddy at other peaks is out-phase, also have some between complete homophase or intact can out-phase between.

Because the thickness of adhesion strength and adhesive layer is inversely proportional to, the adhesion strength between the two adjacent rings of compound strip depends on the distance between relative two surfaces of two adjacent rings to a great extent.Relative two surfaces are leaned on closely more mutually, and adhesion strength is big more; Relative two surfaces are at a distance of far away more, and adhesion strength is more little.By putting into practice the inventive method, adopt the compound strip of individual fibers can make now and have flat surface, like this, the two adjacent rings of compound strip can be on whole surface Continuous Contact mutually basically.Therefore, these compound strip now can be all the time as one man there being the uniform Bond thin layer of thickness to install around between its two adjacent rings, thereby can obtain high adhesion strength.These thin layers of Bond also make and can reach consistent all the time adhesive cures speed rapidly and reduce widely because of spread the cushion effect that agent produces of tying of being stained with between the two adjacent rings of compound strip.And, eliminated Feng Hegu from these compound strip, all radially aligned is just easier to make in the process of installing around good multi-turn with compound strip.

Another benefit of the present invention's technological method is, can equably high tensile strength fiber be coated fully and be sealed in now in the resinite and can not form any space or conduit in compound strip.Therefore resin plays a part to protect the fiber that is embedded in wherein, prevents the machinery and the chemical damage that may be subjected to when it is exposed to environment.And, be used for technological method of the present invention and can produce the bigger high quality compound strip of fiber retention volume, so just can be made into superpower composite.

One aspect of the present invention provides a kind of a kind of manufacture method that the hurricane band of multi-turn high tensile combined material is arranged of making.Comprise according to a method of this aspect of the present invention and to send a step that is in the resin bath of uncured fluid state with many continuous high tensile strength fiber, being sticky so that each root fiber applies resin fully forms a composite material bandlet.Allow compound bandlet be attached to and have on the semi-rigid adhesive band of at least one planar surface, at least one surface of bandlet is closely contacted to form stacking band with adhesive band.Stacking band is wrapped on the axle, makes composite material become a plurality of circles that laminate, the resin in the band is cured to solid-state so that each delineation is formed a spiral structure at least in part.When with adhesive band when compound bandlet peels, just see a compound strip with at least one basic planar surface.

Preferably, adhesive band has enough rigidity, so that at least one planar surface of adhesive band twine and curing schedule in can not be out of shape because of the effect that is subjected to the fiber in the compound strip, but adhesive band should be again soft enough, so that can be equably on axle in winding step.Adhesive band can have at least two flat substantially surfaces, and like this, first and second that are in the interior compound strip of a plurality of each circle that laminates just all contact with a planar surface of adhesive band.Although the rigidity of adhesive band will depend on the certain material that constitutes adhesive band to a great extent, the thickness of preferable adhesive band can be at least about 0.005 inch.Though adhesive band can be made with any thin-film material with suitable rigidity, the adhesive band of polypropylene, nylon and polyester film is good especially.

Be used for making the most handy nonmetallic electrically non-conductive material formation of high tensile strength fiber of composite material.Such as, fiber can be a glass fibre, preferably E type glass fibre.It is desirable for most fiber is that diameter is no more than about 0.001 inch single fiber.Here used " single " speech is meant that each fiber is independently each other, without any transverse filament or other link that several fibers may be kept together.Fiber can be the form of fiber tuft, and each fiber tuft comprises many single fibers.In this situation, wish that each fiber tuft is walked around one group of deployment rod so that each single fiber in each fiber tuft scatters before in entering the resin bath.

The resin of formation composite material is preferably under the cured solid state flexible, and it can be selected from the thing group that comprises polyester resin, vinylester resin, polyurethane resin, epoxy resin, bitumastic enamel, coal tar enamel and similar material.In these resins, polyester resin, vinylester resin, polyurethane resin and epoxy resin are preferable, and a benzene two polyester resins are good especially.Preferable composite material comprises fiber between about 50% to 90% weight percentage and the resin between about 10% to 50% weight percentage; Better is about 65% to the fiber between about 75% weight percentage and about 25% to the resin between about 35% weight percentage; The most desirable is the fiber of about 70% weight percentage and the resin of about 30% weight percentage.

Can comprise that in step one makes fiber be arranged under the bar of resin from one to pass through with fiber feeding resin bath, so that it sharply changes the step of the direction of advancing, thereby the fiber in the fiber tuft is further scattered and further each other separating, and like this, they just can coat resin fully.Fiber can tensioning before the resin bath is crossed in feeding.Can allow fiber walk around one group of release lever so that the travelling forward of fiber that enters the resin bath applied a pulling force, thereby realize tensioning.Above-mentioned technological method provides a kind of simple but effective method that is used to be manufactured on the compound strip of the spiral form that high tensile is arranged on the Hand of spiral.

Another aspect of the present invention provides a kind of reinforcement to extend axially the method that structure makes it to resist radially outer internal force in the structure.A kind of method according to this aspect of the invention comprises that one provides one to have the step of the hurricane band of a plurality of high tensile composite material circles, and each circle has at least one flat substantially surface.A plurality of circles of hurricane band hold structurally with a kind of Bond, make the not relative movement each other of a plurality of circles, also can not move with respect to structure.

By with reference to below in conjunction with the detailed description that accompanying drawing carried out, can understand theme of the present invention and various advantage thereof more completely.

Fig. 1 a dissectd to be in amplification that a two adjacent rings that installs around the experiment hurricane band of position gets and to illustrate cross-sectional figure;

Fig. 2 dissectd amplification that the two adjacent rings of the present invention's hurricane band gets to illustrate cross-sectional figure;

Fig. 3 is the main body figure of hurricane band;

Fig. 4 is the schematic representation that shows the hurricane band preparation process and method of one embodiment of the present of invention;

Fig. 5 is the amplification subdivision sectional view that schematically shows adjacent each circle of the hurricane band that is in the working process;

Fig. 6 is the subdivision schematic representation of hurricane band winding process that shows another embodiment of the present invention;

Fig. 7 is the subdivision front elevation with a structure of the hurricane band reinforcement of one embodiment of the present of invention;

Fig. 8 is the cross-sectional schematic representation along A among Fig. 7-A line;

Fig. 9 is the part schematic front view of a structure, in order to strengthen having installed around a plurality of hurricane band of the present invention on it.Several hurricane bands have excised a part;

Figure 10 is the subdivision front elevation of a structure, has installed around a plurality of hurricane band of the present invention on it, so that strengthen according to another embodiment of the present invention.

Technological method of the present invention adopts the continuous fiber of being made by the lightweight high tensile strength material.Although also can adopt the fiber of making by any high tensile strength material, generally preferably nonmetal nonconducting fiber.From this point, glass fibre is more desirable, and E type glass fibre is lower desirable especially because of its cost.Yet the present invention imagines the fiber that employing is made by other high tensile strength material, such as S type glass fibre, R type glass fibre and Kai Fula (Kevlar).Fiber provides with separate single fiber form.That is, fiber does not comprise any transverse filament, any thermosol or any other links that some fibre may be kept together.The diameter that it is desirable for each single fiber is no more than 0.001 inch.Fiber can provide with the form of bundle, and every bundle fiber all is independent of fiber nearby and can comprises hundreds if not thousands of single fibers.

Referring to Fig. 4, a plurality of fiber tufts 10 are pulled out by a guide device 12 from the packing (not shown), and guide device 12 has a plurality of feed wells 13, and feed well 13 is being guided fiber tuft 10, like this, they just can not tangle mutually and also basically to same aligning in the right direction so that processing subsequently.The number of the fiber tuft 10 that provides depends on width and the thickness and the interior fiber/resin ratio of desirable band of the hurricane band of preparing manufacturing.

Fiber tuft 10 is pulled through a bath 14 that resin 16 is housed from guide device 12.When selecting to be used for appropriate resin of the present invention, must consider several standards.Appropriate resin is preferably its uncured state, and it can fully flow under this state, thereby can be coated on fully on each single fiber in the fiber tuft 10, thereby but has the enough viscosity can filling and be retained in the gap between each fiber.This resin preferably also can reach the solid-state of a kind of elastic memory of performance.By adjust adding the catalyst amounts of resin, resin solidification to the solid-state needed time can be controlled, so that each forming step that can describe below and resin still is in uncured fluid state.

Another factor that needs to consider in Choice of Resin is that the resin of solid state will have the ability that can protect the fiber that is embedded in wherein to avoid chemistry and mechanical damage.From this point, when adopting the spiral that is made of composite material to bring reinforcement one structure, the fiber in the hurricane band generally is main load-bearing member.Correspondingly, the ability that the resin that is in solid state preferably has enough intensity and opposing to be damaged by chemical action and other environmental activities of moisture, soil is compromised or weakens to prevent fiber.

Preferably select simultaneously the resin that can coordinate mutually with fiber at its ductility of solid state and elongation percentage for use.Ductility as fruit fiber and resin is significantly different with elongation percentage, the tensile stress that puts on hurricane band when using as reinforcer will produce a shearing force at the interface place between fiber and the resin, and this power can be destroyed the interface bonding between this two component part.When bonding was destroyed, the corrosive medium such as bronsted lowry acids and bases bronsted lowry in air and the soil will promptly invade and make it to destroy and weaken along fiber.Ductility by making resin and elongation percentage and fiber approaching as far as possible will make shearing force at the interface reach minimum, thereby reduce to take off between resin and the fiber possibility of knot.

Consider above-mentioned standard, being used for appropriate resin of the present invention can choose from the thing group that comprises polyester resin, vinyl ester resin, polyurethane resin, epoxy resin, bitumastic enamel and coal tar enamel.In these materials, polyester resin, vinyl ester resin, polyurethane resin and epoxy resin are more desirable.Also can adopt performance similar to above-mentioned material and satisfy the other materials of above-mentioned requirements.A kind of desirable especially resin is a kind of benzene two polyester resins, and it is by a benzene two polyester benzene components and be used for the resin gel and be cured to solid-state methyl ethyl ketone peroxide catalyzer forming.The composition of various routines also can add in the resin to obtain required property except that this catalyzer.These affixs comprise such as prevent resin be subjected to the protective material, viscosity controlling agent of uv damage, for the purpose of visible or identification to the pigment of coloring resin, or the like.

Before process guide mechanism 12, fiber tuft 10 can feeding be crossed one group of deployment rod or break-in bar 18.One bar group 18 comprises three bars 20,22 and 24, and they are spaced from each other in horizontal plane, for every row's feeding hole 13 of guide mechanism 12 one group of bar 18 is arranged all.Like this, one group of fiber tuft 10 can be above the bar 20 in the bar group 18 that goes up most, bar 22 below and bar 24 above be pulled through, then through row's feeding hole, top 13 of guide device 12.Remaining fiber tuft 10 is walked around the bar 20,22 and 24 and be pulled through of remaining bar group bar 18 similarly, then through each row's feeding hole 13.Break-in bar 18 plays double action.At first, when fiber tuft 10 is advanced around bar 20,22 and 24, they will tentatively separate and be launched into thin single fiber layer.Secondly, break-in bar 18 combines with following back road treatment step, can apply a pulling force to limit fiber tuft by the motion on the overall process direction shown in the arrow 26 to fiber tuft 10.This pulling force can make the fiber tensioning in break-in bar 18 downstreams, thereby eliminates intrastitial any wave-like, and like this, fiber just is aligned to substantially parallel straight line through resin bath 14 time.Can understand from the following description, on fiber, apply hightension and can form hurricane band inferior.By adjusting bar 20,22 in the first bar group 18 and 24 level interval, tension force-each bar that can regulate is applied on the fiber leans on closely more each other, and intrastitial tension force is big more, and each bar is at a distance of far away more, and intrastitial tension force is more little.

Come out from guide device 12, converge mutually while fiber tuft 10 enters resin bath 14.In case enter resin bath 14, fiber tuft 10 just is pulled through from scatter bar 28,30 and 32 belows of resin 16 subsurface groups of being arranged to the ladder shape.That is, that part that is pulled through two row's feeding holes 13, top such as fiber tuft 10 will be pulled through below the bar 28 that scatters; Those parts such as the middle two row's feeding holes 13 of being pulled through of fiber tuft 70 then are pulled through below the bar 30 that scatters again; Those declines that are pulled through two row's feeding holes 13, bottom such as fiber tuft 10 then are pulled through below the bar 32 that scatters again.Along with fiber tuft 10 is pulled through below scatter bar 28,30 and 32 respectively, obvious variation takes place in them on direct of travel, and further scatters each other, makes resin 16 can more easily manage between each single fiber and soaks into fiber tuft.And the bar 28,30 and 32 that scatters guarantees that fiber passes and just do not float from its surface from resin 16.

The fiber that is applying resin respectively below scatter bar 28,30 and 32 through after, they will become the form of compound bandlet 34,36 and 38, each compound bandlet all contains the many continuous fibers that extend each other in the resin matrix substantially equidirectionally. Compound strip 34,36 and 38 is rolled over and to be scraped mechanism 40 being pulled through a rubber again when resin bath 14 is pulled out, but this mechanism 40 comprises a fixing lower beam 42 and and is hinged to a frame (not shown) and the heavier upper boom 44 of free floating, when compound bandlet 34,36 and 38 during through the gap 46 between the bars 42 and 44, the rolling of heavier bar 44 effect of scraping makes the resin 26 between each single fiber stressed and increase the degree of resin impregnated fiber tuft.Excessive resin is struck off from compound bandlet, and each compound bandlet then is merged into a single compound bandlet 48.Compound bandlet 48 can be pulled through a carding apparatus 50, and carding apparatus 50 comprises that one is basically perpendicular to elongate rod and a plurality of upwardly extending finger-type bar 52 of width direction that traverses band that extends with 48 direct of travel.Be pulled through between per two finger-type bars 52 by the continuous fiber with basic equal amount, carding apparatus 50 guarantees that fiber distributes substantially equably along the whole width of compound bandlet 48.

After leaving carding apparatus 50, bandlet 48 contact and fit to from a reel 58 along arrow 56 directions and walk around continuously that the idler roller 60,62 and 64 that rotates along arrow 66,68 and 70 directions brings by a kind of on the continuous belts 54 that sticking material is made.Compound bandlet 48 contact with adhesive band 54 on one side, from scraper plate 72 that a usefulness rubber or another kind of soft material make below pass through on one side.Scraper plate 72 scrapes any excessive resin 16 from compound bandlet 48, this resin is got back in the bath 14 then.In case compound bandlet 48 has passed through scraper plate 72, the resin in it and the ratio of fiber will remain unchanged substantially.Wish compound bandlet 48 comprise about 50% to the fiber between about 90% weight percentage and about 10% to the resin between about 50% weight percentage; Preferable be about 65% to the fiber between about 75% weight percentage and about 25% to the resin between about 35% weight percentage; The resin of the fiber of preferably about 70% weight percentage and about 30% weight percentage.

Leave scraper plate 72, adhesive band 54 and compound bandlet 48 will be made another stacking band 74 and advance together, then stacking band is wound on round and round along on the axle 76 of arrow 78 directions rotation, the assembly 80 that formation is made of the compound bandlet layer 48 and the adhesive band layer 54 of the interleaved that is wound into spiral structure is to guarantee that stacking band 74 is wound on the axle 76 tightly.Before the coiling step, can apply one deck adhesive band 54 or similarly every adhesive coating layer on the axle 76, so that after the resin gelling, assembly 80 is taken off from axle.Because the internal diameter of assembly 80 is corresponding with the external diameter of axle 76, the concrete selection of the diameter dimension of axle 76 will be depended on the minimum diameter of the hurricane band that special-purpose is required.Generally, the diameter of axle 76 diameter half that is taken as the structure that finally will install around hurricane band.It is desirable for stacking band 76 is wound between a pair of flange 84 and 86 that separates on the axle 76, thus the width of limitation unit 80.

In case at the stacking band 74 of the required number of turns of having reeled on the axle 76 (typically between 10 to 20 circles), just with the assembly on the axle 76 80 by cut off the remaining part of stacking band 74 perpendicular to length direction cutting stacking band.Then, the axle that assembly 80 is housed is deposited under environmental conditions, between storage period, the resins in the compound bandlet 48 will partly solidify or gelling to solid-state, make a lot of circles in the assembly 80 be fixed into spiral structure.The length of this gelation time depends on the quantity of the catalyzer that adds the resin matrix composition.In case gelling just can be by solidifying resin such as the temperature that in a pressure air-oven assembly 80 is heated between about 100 to about 250 fully.For discussed above more desirable between benzene two polyester resins, a typical heating schedule can comprise a cycle step by step, in this cycle, assembly 80 was heated to earlier between about 170 °F to about 180 °F one hour, then about 250 °F about two hours down.

When the resin in the assembly 80 16 gelling to sufficiently rigid solid-state so that composite material will can not produce permanent deformation, assembly can be taken off from axle 76, and can repair the edges at two ends that the resin flash district is arranged except that it, and make assembly that needed width be arranged.Resin 16 is coated at assembly 80 trimmed edges then, and assembly 80 is handled by last cure cycle.In case the resin in the assembly solidifies fully, just adhesive band 54 can be peelled off and stay the hurricane band 90 of a lot of circle composite materials, as shown in Figure 3.

In the step that stacking band 74 is wound on the axle 76, will typically make stacking band reel tightly like this along the fiber tension of stacking band 74 length directions, so that each the circle stacking band on the axle all is subjected to extruding of each circle subsequently.Because in this winding process, the resins 16 in the stacking band 74 are in fluid state, the trend that this squeezing action generally has the surface that makes compound bandlet 48 to be distorted.In other words, referring to Fig. 5, because the tension force in the fiber, fiber has the tightly trend of winding mandrels 76, so that when adhesive band 54a is made by the not enough material of rigidity, the fiber in the circle 88 of assembly 80 will apply the local power that this adhesive band 54a in the last circle 87 that becomes to making assembly deforms.Because this moment, the interior resin of compound bandlet 48a of this circle 87 still was in uncured state, resin can not support adhesive band 54a and prevent its local deformation.On the contrary, resin will be yielded to these power, and generation is along the surface undulation or the ripple of the length direction extension of the compound bandlet 48a of this circle 87.Along with continuing that stacking band 74 is wound up on the axle 76, the follow-up circle of each of stacking band will make several circles of its front deform in a similar fashion.In the sectional elevation of the circle of two shown in Fig. 1 a and 1 b hurricane band, " peak " 92 and " paddy " 94 have shown these external wavinesses.

The distortion that can cause forming the compound bandlet 48 of external waviness can be eliminated substantially by selecting suitable adhesive band 54.That is, by select a kind of have enough rigidity and can be in the coiling step adhesive band 54 of local deformation, can form its surface is that each of compound bandlet 48 of flat assembly 80 enclosed as the cross-sectional figure of Fig. 2 as shown in substantially.Simultaneously, adhesive band 54 again must be enough soft, so that it can be wrapped on the axle 76 by each circle with smooth curved in the coiling step equably.From this point, suitable adhesive band can be made by the material of polyester, polypropylene, nylon and so on, after compound bandlet 48 solidifies, these materials can not bond thereon securely, in the resin gelling stage, they can bear the heat that resin 16 is produced again, and can also bear the heat that puts on assembly 80 in the solidification process in the end.Certainly, the rigidity of adhesive band had both depended on that its composition also depended on its thickness.Such as, when polyester film was used as the adhesive band material, the thickness of adhesive band was preferably between about 0.005 inch to about 0.010 inch.And preferably adhesive band has at least one flat substantially surface.Here used " flat substantially " speech is meant that the surface of adhesive band 54 and each the surface planarity deviation of surface in cross-sectional figure of enclosing of hurricane band 90 should not exceed about 1/64 inch every foot.The planar surface of very desirable adhesive band also can have the surface finishment that has texture.

In manufacturing process of the present invention, the surface of compound bandlet 42 generally will be consistent with the flatness and the surface texture on the surface of contacted adhesive band 54.Therefore, hope will stacking band 74 be wound up into step on the axle 76 be arranged to make compound bandlet 48 two surfaces all with the coarse texture of adhesive band but that flat substantially surface contact.This can be by in the coiling step, compound bandlet 48 being clipped in two adhesive bands 54 and 55 texture slightly but realize between the flat substantially surface, as shown in Figure 6.But only had better adopt slightly but the method for flat substantially single adhesive band with two-sided all texture.In such method, when stacking band 74 is on axle 76, a surface of compound bandlet 48 will be consistent with the corresponding surface of adhesive band 54 in the stacking band 74, and another surface of compound bandlet 48 will be consistent with another surface of adhesive band 54.

Basically along with said method, just formed hurricane band 90 with a plurality of high tensile composite material concentric turns.Referring to Fig. 3, hurricane band 90 includes the inner lane an of the inner 96, the outmost turns that an outer end 98 is arranged and a plurality of mesosphere.This compound strip desirably comprises the cured resin matrix of continuous morphology, and resin matrix is being sealed a large amount of continuous fibers along the mutual high tensile in the same way of Hand of spiral.Although fiber is always represented with parallel longitudinal line 100 in the same way in Fig. 3, hundreds of even several thousand long grain fibers are represented in the space between per two adjacent flat lines 100 in fact.Each circle of hurricane band 90 has a kind of elastic memory, this means that an available power is launched band, in case but this power of removal, band gets back to again that it is initial spiral-shaped.The elasticity of circle is preferably such, promptly band make it tend to be rolled into spiral helicine power to be greater than its weight, when band was got up with outer end 98 suspensions, band can be retained in spiral status like this.Obviously, the surface of band will not have uneven, and exactly, Dai a surface is flat substantially at least.More preferably, as shown in Figure 2, two surfaces of band all are flat substantially.Very preferably, the deviation of the planeness of band in the cross section is no more than 1/64 inch every foot, and surface wave degree (being surface undulation) is no more than 0.003 inch.And the surface of very desirable band is the nominal surface texture of about 12.5 microinch when measuring with a profilograph.

The hurricane band made from above-mentioned technological method can be used to strengthen the destruction that axially extended structure causes with the opposing internal forces.This class formation can comprise such as being used for pipeline, holding vessel, the storage of higher pressures container of under pressure conveyance fluid, the concrete bridge supporting member of reinforcement, and from inside to outside internal force arranged radially availablely extend axially other structures that structure is estimated.Bear in the application of very big internal pressure in structure, such as gas transmission pipeline, can twine structurally with one or more hurricane bands 90, what make band respectively encloses arranged concentric.Referring to Fig. 7 and Fig. 8, this reinforcement technology is included on the outer surface of structure 104 the fixedly initial step of one deck adhesive pad 102.A kind of this suitable class adhesive pad 102 all has the contact Bond to close born of the same parents' ethene pad such as its both sides that can be rectangle.As a kind of preferred way, the suitable Bond of one deck 106 can be coated with on the outer surface of structure 104 before closing hurricane band 90.During beginning, hurricane band 90 is bonded on the structure 104, makes the orientation of hurricane band 90 be basically perpendicular to the axial of structure by outer end 98 is bonded to adhesive pad 102.Because outer end 98 is held in place, while can it be installed around hurricane band 90 on structure 104 by decontroling hurricane band.At first lap after on structure 104, the outer surface of this circle be coated with Bond 106 and again on the structure winding screw band 90 to form next circle.The outer surface of this next circle is coated with Bond 106 and again around a circle again, as shown in Figure 7, this process so continues, and all has been applied on the structure 104 up to whole hurricane band 90, to form a dribbling 110 around it, wherein contact with that circle of the bottoming of 3 dribblings 110 with the inner 96 of 90.Dribbling 110 comprises that at least 5 circle hurricane bands 90 are better, is preferably about 8 circles.

The U.S. Patent application No.07/942 that is entitled as the method for pipeline " repair " has disclosed in 731 and has been suitable for installing around the Bond that hurricane band 90 uses.The content that is disclosed in this reference paper is drawn at this and is reference.In brief, these Bonds all have an initial fluid state, and under this state, they have is convenient to the suitable viscosity that applies and bond, and finish install around after, they can be cured to a kind of harder more firm bond state.More preferably be that these Bonds can be resisted because of long term exposure at solid state and cause damage in environment.From this point, the peroxide catalyst that a kind of desirable especially Bond comprises the methyl methacrylate solvent and is used for making solvent to solidify, each component is mixed so that a kind of Bond of not finishing the process of installing around enough curing times that has to be provided with proper proportion.

Along with each circle of hurricane band 90 is wound on the structure 104, the elasticity of composite material makes each circle embrace together with certain tightness and embrace on the outer surface of structure.It is desirable in case whole hurricane band 90 all installs around and finishes, make its radially aligned, up to all basic alignment mutually of every side margin of dribbling 110 with regard to the edge of patting each circle with the thing of wooden unit and so on.Owing to each circle of hurricane band 90 is not interlocked mutually and limits the surface undulation of its transverse movement, this alignment is to realize easily.Then, each circle that can make dribbling 110 with mechanical means further and tight contacts with the intimate of structure 104 up to the inner ring of dribbling.Hold tightly in the process at this, the adhesive layer that still is in uncured fluid state 106 between the adjacent turn plays and is convenient to the lubrication that each circle is held tightly.When each circle that makes dribbling 110 was held tightly, along with each circle leans on more and more closelyer, unnecessary Bond was just extruded between these circles.Because the surface of hurricane band 90 is flat substantially, the apparent surface of two adjacent rings can be adjacent to mutually, like this, just has only skim Bond 106 between these surfaces.As a result, will produce firm bonding and the adjacent turn of dribbling 110 will be sticked together firmly.And the grain surface of hurricane band 90 is with the reinforced cementitious dose of cohesive force to each circle of band.Do not need to apply dribbling 110 last laps with Bond 106.Can use one or more band, such as fiber band, around tying dribbling 110, it is on the throne that it is held tightly, and the Bond 106 between each circle is cured to enough bond state.

In some applications, may need to strengthen an axial direction part of a structure, its length is greater than the width of single hurricane band 90.At this moment, as shown in Figure 9, can install around structurally, constitute a plurality of dribblings 112,114,116,118 and 120 of a corresponding axial length that is covered with structure with several thread belts 90.Each dribbling 112-120 all forms as dribbling 110.Although shown dribbling 112-120 all edge-to-edge ground mutually against, the actual contact of a dribbling and next dribbling is optional.On the contrary, structure can have closely spaced each dribbling 112-120 enough to be strengthened therebetween with installing around.

Pressure in those structures is significantly less than in the applicable cases of the pressure in the gas transmission pipeline, is not sought after strengthening, such as, reinforcement is exactly this situation with the pillar of the bridge that reinforced concrete builds up.In order to strengthen this structure, as shown in figure 10, can one or more hurricane bands 90 be twined structurally along opposite lift Hand of spiral.Adopt the above-mentioned technology that structure 104 is strengthened, adopt with adhesive pad 102 similar adhesive pad (not shown)s with the outer end 98 of hurricane band 90 with an oblique angle initial adhesion on structure 122.After on the outer surface that a layer binder (such as Bond 106) has been applied in structure 122, can with a hurricane band 90 while the mode with the lift spiral decontroled on structure, each circle of hurricane band 90 all keeps to the side with last circle limit, to form first lift spiral dribbling 124.If desired, can be after whole hurricane band 90 install around on the structure 122, second hurricane band 90 installed around thereon with the same manner.Like this, be fixed to after spiral dribbling 124 and a layer binder applied thereon, can have installed around one second hurricane band 90 to cover the first spiral dribbling 124 at one second adhesive pad.Typically, second hurricane band 90 can be installed around the spiral dribbling 126 opposite of each spiral ring of Cheng Yiqi, if desired, also can install around additional hurricane band to form more dribbling layer with each spiral ring direction of dribbling 124.Still like that, the planar surface of hurricane band 90 can make band so entirely install around on structure 122, so that is having only the skim Bond between the outer surface of spiral dribbling 124 and structure 122 and between spiral dribbling 126 and spiral dribbling 124.Have only skim by Bond is limited to, between each composite portion, just formed firm bonding.

Although described the present invention here in conjunction with the embodiments, should understand that these embodiments have just represented principle of the present invention and application.Therefore should be understood that the embodiment to being disclosed can do many changes, and can design other structural configuration, and can not depart from the spirit and scope of the present invention that limited by the appended claim book.And, should be understood that the present invention except those features that in claims, specialize, also be intended to comprise the various compound of each feature described herein.

Industrial applicability:

Technological method of the present invention can provide the composite reinforcing bands of high tensile, and they can more effectively be used for repairing being corroded part and being used for strengthening pipeline with restriction plastic failure and brittle failure spreading along pipeline of pipeline than known reinforcing strip.

Claims (31)

1. a manufacturing has the method for the hurricane band of multi-turn high tensile composite material, it is characterized in that comprising the following steps: to provide a kind of resin that a uncured fluid state and solidifies solid state that has; Be provided as the fiber of the continuous high tensile of the multi beam of bundle form, each described fiber tuft comprises many separate single fibers; Launch part at interval so that described fiber tuft is launched into described single fiber at described a plurality of fiber tufts by one group; Along a direction of feed described each single fiber feeding is bathed by a described resin storage tank that is in described uncured fluid state, thereby make described fiber form the continuous bandlet that a described composite material with first and second surfaces is formed by described resin-coating fully; The described bandlet of described composite material is sticked the semirigid adhesive band with at least one planar surface of one deck, and what make at least one surface and described adhesive band in described first and second surfaces of described bandlet is described to being that a planar surface closely contacts to form a stacking band; Described stacking band is wound on the axle, makes on axle, to form a plurality of described composite materials that laminate circle; It is solid-state multi-turn is shaped as a spiral structure that described resin in the described bandlet of described composite material is cured to described curing at least in part; The described bandlet of described adhesive band from described composite material peeled, thereby at least one the described surface in described first and second surfaces of the described bandlet of described composite material is one to be flat surface substantially on the cross section.

2. the method for claim 1, it is characterized in that, described adhesive band has enough rigidity, so that the described planar surface of at least one of described adhesive band can not be out of shape because of the effect of the described fiber in the described bandlet that is subjected to described composite material in described coiling and curing schedule, but it is again soft enough, so that it can surround on the described axle with smooth song in described coiling step equably.

3. the method for claim 1 is characterized in that, the thickness of described adhesive band is about 0.005 inch.

4. method as claimed in claim 3 is characterized in that, described gluing every band made by nylon.

5. method as claimed in claim 3 is characterized in that described adhesive band is made by polyester resin.

6. as claim 1 or 3 described methods, it is characterized in that there is a nominal surface finishment that is about 12.5 microinch at least one described surface on described first and second surfaces of the described bandlet of described composite material.

7. the method for claim 1, it is characterized in that, described adhesive band has two planar surfaces at least, like this, each described first and second surfaces of described a plurality of described bandlets that laminate the described composite material in the circle all with the described break even chart face of described adhesive band in one contact.

8. method as claimed in claim 7, it is characterized in that, described adhesive band comprises two adhesive bands, each adhesive band has at least one planar surface, described stickup step comprises such step, promptly, with one in described first and second surfaces of the described bandlet of described composite material with described two adhesive bands in one described planar surface closely contact, and in described first and second surfaces of described bandlet of described composite material another closely contacted with another described planar surface in described two adhesive bands, to form described stacking band.

9. the method for claim 1 is characterized in that, described tree refers to that solid-state in described curing is flexible.

10. method as claimed in claim 9 is characterized in that, described resin is chosen from the thing group that comprises polyester resin, vinyl ester resin, polyurethane resin and epoxy resin.

11. method as claimed in claim 10 is characterized in that, described resin comprises a benzene two polyester resins.

12., it is characterized in that described high tensile strength fiber comprises non-metallic fiber as claim 1 or 10 described methods.

13. method as claimed in claim 12 is characterized in that, described high tensile strength fiber is non-conductive.

14. method as claimed in claim 12 is characterized in that, described fiber comprises glass fibre.

15. method as claimed in claim 14 is characterized in that, described glass fibre comprises E type glass fibre.

16., it is characterized in that the diameter of every described fiber is no more than about 0.001 inch as claim 1,3,12 or 15 described methods.

17., it is characterized in that the described bandlet of described composite material is formed to the described resin between about 50% weight percentage to the described fiber between about 90% weight percentage and about 10% by about 50% as claim 1,9,10 or 16 described methods.

18. method as claimed in claim 17 is characterized in that, the described bandlet of described composite material is formed to the described resin between about 35% weight percentage to the described fiber between about 75% weight percentage and about 25% by about 65%.

19. method as claimed in claim 18 is characterized in that, the described bandlet of described composite material is made up of the described fiber of about 70% weight percentage and the described resin of about 30% weight percentage.

20. the method for claim 1, it is characterized in that, described the step of described fiber feeding by described resin bath comprised such step, promptly, make described fiber walk around one and be positioned at the parts of described resin, thereby change the described direction of feed of described fiber.

21. the method for claim 1 is characterized in that, described described fiber feeding is also comprised the step that makes described multifilament tensioning before by the step of described resin bath.

22. method as claimed in claim 21 is characterized in that, described tensioning step comprises such step, that is, make described multiple fibre by one group of isolated parts to limit described fiber moving along described direction of feed.

23. method as claimed in claim 3, it is characterized in that, also comprise such step, promptly, the described bandlet of guiding described composite material makes the basic five equilibrium of described many fibers ground by the interval between described a plurality of teeth by a carding apparatus that comprises the tooth at a plurality of intervals.

24. the method for claim 1, it is characterized in that, described axle comprises a pair of flange that radially extends that separates an intended distance, described stacking band is wound on the described axle between described two flanges, like this, the described bandlet of described composite material has basic and described intended distance equal widths.

25. the method for claim 1 is characterized in that, also comprises such step, that is, the described bandlet of described composite material is heated between about 100 °F to about 250 °F so that described resin solidifies fully.

26. the composite material tape of the high tensile of a method manufacturing according to claim 1.

27. the composite material tape of the high tensile of a method manufacturing according to claim 9.

28. the composite material tape of the high tensile of a method manufacturing according to claim 14.

29. the composite material tape of the high tensile of a method manufacturing according to claim 17.

30. one kind extends axially structure to one and strengthens to make it to resist the method from the radially outer internal force of described structure, it is characterized in that, this method comprises the following steps: to provide a hurricane band with multi-turn high tensile composite material, and it is flat substantially on the cross section that every circle has at least one surface; Described multi-circle spiral flow band is surrounded on the described structure, when holding, between the adjacent turn of described multi-turn, apply a layer binder.

31. one kind extends axially structure to one and strengthens to make it to resist the method from the radially outer internal force of described structure, it is characterized in that, this method comprises the following steps: to provide one to constitute a spiral-shaped composite material tape, it ends at an inner and outer end, and a plurality of elastic rings that are used to hold with the described structure of obvolvent are arranged, each circle has an internal surface and an outer surface of being close to the corresponding surface of adjacent turn, described internal surface of at least one of described each circle or outer surface are flat substantially in the cross section, described composite material comprise many be embedded in resin basic in and be parallel to the cellosilk of the continuous high tensile of the described spiral of Hand of spiral extend through; Described composite material tape is surrounded on the described axially extended structure; Described hold step in, between the adjacent turn of described multi-turn, apply a layer binder.

Images