CN1082135A

CN1082135A - Method for repairing underground drainage pipe

Info

Publication number: CN1082135A
Application number: CN 92109322
Authority: CN
Inventors: 汉斯·穆勒
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-11
Filing date: 1992-08-11
Publication date: 1994-02-16
Anticipated expiration: 2007-08-11
Also published as: CN1070568C

Abstract

A method of repairing a damaged (fractured) portion of a subterranean tubular comprises: impregnating one or more layers of fibrous material with a hardenable plastic compound; winding the thus produced liner on a radially expandable hose; feeding the hose to the damaged part; expanding the hose and liner so that the liner engages the inner surface of the pipe; after the compound hardens, the hose is retracted and the tubing is withdrawn. A polyethylene film is inserted between the outer surface of the hose and the inner surface of the lining layer to increase friction, so that the hose rotates when being expanded. The hose is expanded to force the compound out of the periphery of the liner to adhere the liner to the pipe and at least partially fill the crack. The compound also extrudes from the axial end of the liner to form a smooth transition between the inner face of the pipe and the outer face of the liner.

Description

Repair the method for subsoil drain

The present invention relates to repair the improvement of defectiveness fluid pipeline method, specifically, relate to the improvement of repairing the gutter method, more particularly, relate to repairing and place into the soil or the improvement of the gutter method that crack or other damage are arranged of other material.

Deutsche Bundespatent discloses a kind of whole method of repairing the part buried pipe of single layer fibre material lining of using impregnated with resin for 3922351A1 number.This lining is wound on the radially distensible flexible pipe, and flexible pipe is expanded internally lining is pressed on the inner surface of pipeline defective part.It is overlapped thereby guaranteed that the lining of reeling still remains a cylindrical body after expansion is finished to be wound on the marginal portion of the lining on the expansible carrier.This layout is maybe should be, when the operation of the lining of expanding flexible pipe and coiling was finished, the lining edge was overlapping with about 90 ° angle mutually.

In the expansion process process, that is to say, thereby radially outward expand when contacting that it is static that the flexible pipe of the lining of reeling keeps with the inner surface of the defective part of pipeline when lining.The overlapping marginal portion of lining rubs and the friction type joint, flexible pipe and the radial dilatation effect that lining of coiling then bears the pressure fluid that enters flexible pipe on it mutually mutually.In addition, the radial dilatation of flexible pipe makes lining do extensional motion with respect to flexible pipe.Therefore, the resin that soaks into the lining of reeling is not extruded at the periphery and/or the axial end portion of the lining of expansion.In any case, from lining radially outward and the amount of the resin of axially extruding all be negligible, therefore, to be used in be very little on the inner surface of pipeline to the masterpiece of expansion lining.Some radial compression of the individual layer lining of impregnated with resin only just produces when finishing expansion process, the flexible pipe of expansion continues to exert pressure to the lining of expansion, that is to say, just when the broken parts of pipeline is used as the hammering block of lining of expansion or support, just makes the individual layer lining reduce thickness and extrude some resins.

The shortcoming of aforementioned prior art scheme is that (broken parts of pipeline generally is one or more crack to the broken parts of pipeline.The flowable mass that is transferred such as raw sewage are spilt infiltrate from buried pipe in the soil around the pipe) must stand the very significant radially outer stress that the tubulose lining by expansion applies, cause other damage easily, as crackle widen or pipeline cracked fully.In addition, the amount of resin of extruding from the tubulose lining when finishing expansion process is less, and therefore, the resin of extruding from lining (if extruding) can not the filling crack, can not guarantee will expansion lining bond on the adjacent tight inner surface of pipeline broken parts.

An object of the present invention is to provide a kind of simple, cheap and repair the method for descending pipelines such as sewage defectively reliably.

Another object of the present invention provides a kind of method, even this method can guarantee also to extrude from the tubulose lining the hardenable plastic compound (as epoxy resin) of high percentage before expansion process, thereby seal one or more crack reliably, the lining of expansion is adhered on the inner surface of the damage of pipeline or defect part reliably.

Another purpose of the present invention provides a kind of novelty, and improved formation is soaked with the method for the lining of hardenable sealing and adhesive compound.

Another object of the present invention provides a kind of novelty, the improved method that makes tubulose lining and the expansion of its carrier, thus make lining can engage reliably and be securely fixed on the inner surface of underground comb or other pipeline defective part.

Another object of the present invention provides a kind of novelty, and improved method makes lining soak into hardenable sealing and bonding compound equably.

Another object of the present invention provides a kind of method that guarantees to soak into and be provided with fibrous material in the short time interval.

Another object of the present invention provides a kind of novelty, the method for improved radial dilatation one or more flexible pipe, wherein all reeling separately lining of every flexible pipe.

A further object of the invention provides a kind of method, according to the method, uses single lining two or more holes, crack or the similar defective in the closed conduit simultaneously when underground when pipeline is embedded in.

Another object of the present invention provides a kind of novelty and the improved device of implementing said method.

Another object of the present invention provides a kind of novelty and the improved mechanism that carrier and the lining on the carrier is sent into the defectiveness pipeline.

Another object of the present invention is but that the friction between hypertonic carrier radially and the lining on the carrier is controlled.

From repairing or repair at least one selected part of the buried pipeline of small part (as gutter), above-mentioned at least one selected part has at least one crack or similar defect area need seal or filling according to a kind of method of the present invention.This improved method has following step: soak into hardenable ductile material (as a kind of compound, to call compound in the following text) and contain the lining of one deck fibrous material at least; Radially expansible with the lining coiling that soaked and shrink flexible pipe or similar hollow tubular carrier, the tubulose shell that has lap and first and second axial end with formation, between carrier and tubulose shell, form significant friction, thereby the radial dilatation of carrier drives the radial dilatation of tubulose shell simultaneously, is accompanied by the lap slip each other of the tubulose shell in the radial dilatation; Carrier and tubulose shell are sent at least one selected part of pipeline; Carrier and tubulose shell are expanded therein thereby made the tubulose shell joint touch at least one selected part of pipeline, but (a) make the hardening compound of following generation flow at least one defectiveness district, (b) carrier is rotated with respect to pipeline; Carrier after the expansion is shunk, thereby the carrier that makes contraction separate with the tubulose shell of having expanded; From shell, withdraw from the carrier of contraction; And hardenable compound is solidified.

Above-mentioned expansion step also comprises: the lap of mutual extrusion tubulose shell is also extruded hardenable compound from least one axial end of the tubulose shell expanded.In this arrangement, the external diameter of carrier is wanted remarkable internal diameter less than pipeline before expansion step.

The most handy gas or liquid are expanded tubular carrier internally in the expansion step.The coiling step can comprise: the lining that will soak forms the tubulose shell with certain axial length, and carrier will exceed two axial ends that tubulose is crossed.

The step that forms friction between carrier and tubulose shell can comprise: a kind of suitable film is set between lining and carrier, for example, polyethylene sheeting.The step that film is set or can after soaking into step and before the coiling step, carry out.The coiling step of this method can also comprise makes film form the body that surrounds and axially exceed carrier.

In addition, also can comprise in the step that forms friction between carrier and the tubular body: between lining and carrier, introduce plural layers (for example, multilayer polyethylene film).The coiling step then also can comprise the body that plural layers form is surrounded carrier and have the axial end that exceeds tubular body, and this method preferably also comprise step that carrier is fixed at the two ends of body with prevent the process middle tube body of radial dilatation open around and expose carrier.

The coiling step can comprise: lining formation is had the spirality of many circles, for example have the spirality that many whole circles add the part of a circle.If lining has the overlapping layer of many fibrous materials, so, the coiling step can comprise: lining is formed have many circles and every circle all has two-layer or more multi-layered spirality.

Expansion step can comprise: introduce the fluid with certain pressure in carrier, the pressure of fluid is the function of many parameters, these parameters are included as tubular body are pressed in the degree that the needed carrier of inner surface of pipeline is expanded with predetermined dynamics, and the character of lining fiber.The circumferential lengths that also has the lining that a parameter may be reeled.

The scope that the lining fibrous material can be selected is a glass fiber, carbon filament and KEVLAR(trade mark) fiber.

Soaking into step can comprise: hardenable plastic compound is applied on the fibrous material layer many gatherings or that separate; Overlapped above-mentioned fibrous material layer is limited in overlapping fibrous material layer and the plastic compound that applies in the covering of one covering such as polyethylene sheeting; And on the direction that makes plastic compound infiltrated fiber material layer, above-mentioned covering is applied external force, preferably make plasticity permeate whole lining.Above-mentioned covering is a printing opacity, and afterburning step can comprise by a kind of similar at least instrument that rolls pin scatters plastic compound in covering.

Novel feature of the present invention has concrete statement in the claims.But, read over the detailed description of contrast accompanying drawing to concrete preferred embodiment, can more deep understanding be arranged to this improved method itself and feature and advantage thereof.

Stereogram shown in Figure 1A has described to apply the step of hardenable plastic compound on half of fibrous material layer, wherein, this half fibrous material layer is covered with incomplete light-passing plastic film covering, and plastic sheeting is covered with a flat base plate;

Front elevation drawing shown in Figure 1B represent fibrous material layer second half be folded in above-mentioned on half and form a multilayer lining;

Front elevation drawing shown in Fig. 1 C represents that each layer of lining is limited in the plastic sheeting covering, also draws and is using one to roll pin, so that scatter plastic compound and make plastic compound soak into lining in covering.

Fig. 1 D presentation graphs 1C finishes the situation when scattering step;

Shown in Fig. 1 E axially sectional view represent to surround the tubulose shell that constitutes by the lining of reeling on the radially expansible and flexible pipe carrier that shrinks, between is across plastic sheeting, thereby forms significantly between the inner surface of carrier external surface and the tubulose shell that is made of the lining of reeling and rub;

Front elevation drawing is similar to Fig. 2 a shown in Fig. 2 A, but is being coated with uneven plastic compound on the soft first little fibrous material layer, and first fibrous material layer is covered with plastic sheeting, and plastic sheeting then is covered with a base plate;

Fig. 2 B is illustrated on the end face of first fibrous material layer of Fig. 2 A structure and adds second fibrous material layer of separation, but uneven hardening plasticity compound coat is also arranged on second fibrous material layer;

Fig. 2 C is depicted as by rolling pin plastic compound is scattered the mode of fibrous material layer shown in Fig. 2 B, rolls pin by the overlay covering application of force;

Fig. 2 D presentation graphs 2C structure is finished the situation of scattering step, but covering has been opened the double-deck fibrous material lining of hardening plasticity compound that exposed the infiltration that obtains like this;

Fig. 2 E is depicted as the part of the tubulose shell of the radial dilatation of being made by lining shown in Fig. 2 D, and this part adheres on the defect area inner surface of selected part of pottery or other suitable material conduit;

Shown in Fig. 3 A axially sectional view represent a part of defective pipeline and surround fibrous material tubulose shell, be in the carrier of contraction state, across the plastics that help to rub, carrier and tubulose shell are in the state of preparation radial dilatation so that force the tubulose shell to prop up the inner surface of defectiveness pipe section between carrier and tubulose shell;

Fig. 3 B is the end sectional view of the amplification of looking along the direction of arrow of Fig. 3 A center line III B-III B;

Fig. 3 C is the cross section of the tubulose shell of radial dilatation, and the tubulose shell is made by the multilayer lining of fibrous material twist, and the tubulose shell of expansion engages the inner surface of defectiveness pipe section hermetically, the plastic compound filling crack part of pipeline;

Fig. 4 A is the axial sectional view similar to Fig. 3 A, but represents that carrier and tubulose shell are the radial dilatation state in the pipe section that damages;

Fig. 4 B is the sectional elevation of the amplification of structure shown in Fig. 4 A;

Axial sectional view shown in Figure 5 is represented the defective part of pipeline and at the tubulose shell of ducted expansion; And

The axial sectional view of pipeline shown in Figure 6, row's carrier is in respectively in the different defective part of pipeline.

Now contrast Fig. 1, a square or rectangular base plate 3, its length is L, and width is B, highly is H, and a light-passing plastic film 2 is preferably polyethylene sheeting, covers on it.The width of film 2 equals or at least slightly greater than the length L of base plate 3, and the length of film equals at least but preferably at least slightly greater than 2B.Film 2 is covered by microscler fibrous material layer, this fibrous material layer comprises the first that covers that part of film on base plate 3 end faces fully or the first half 1A, and be linked as wholely with the 1A of first, be covered with the second portion or the second half 1B of base plate 3 right-hand films 2.Select the size of base plate 3, the width of film 2 and comprise part 1A, mend during the fibrous material layer total length of 1B with wanting satisfaction guaranted underground pipeline 12 selected (defectiveness) part (for example, see Fig. 3 A, 3B and 4A), underground pipeline for example can be a gutter, and it imbeds the underground predetermined degree of depth at least in part.But Figure 1A also represent with the stream that a hardening plasticity compound 14 forms put on fibrous material layer part 1A exposure above.

When on part 1A, using plastic material stream 14 and finish, part 1B is folded on the part 1A, make two overlapping parts form the pair of lamina linings, but on the folding part 1B that comes, also apply an a selected amount of hardening plasticity compound 14.Plastic compound 14 coatings can be but need not to be uniformly, but employed plastic compound total amount should be enough to permeate fully the fibrous material lining that comprises

part

1A and 1B at least.The lining that obtains like this, its length equal or are similar to B, and its width is L.

Next procedure is that the unmasked portion with film 2 is folded on the plastic compound 14 on the end face of part 1B, thereby makes film 2 form the covering that encases lining and two plastic compound coatings fully.The instrument 4 that the pin shape is rolled in use carries out manual operations so that plastic compound 14 is scattered at the end face of the printing opacity covering that is formed by film 2 in two

parts

1A and 1B, thereby make these two parts form basic infiltration (promptly full closing) but the fibrous material layer 1A ' of hardening

plasticity compound

14,1B ' (Fig. 1 D).Simultaneously, instrument 4 makes the two sides of base plate 3, and promptly layer 1A ' and between 1B ' twist joint 1E and a side parallel with the 1E side reasonably accumulate a large amount of plastic compounds (seeing shown in Fig. 1 C label 5).Comprise a layer 1A ', the lining length B of 1B ' equals or is similar to that (preferably at least slightly greater than the length of the defective part of pipeline 12, the width L of lining will surpass the girth of the pipeline defective part inner surface that will repair.For example, the width L of lining can equal or be similar to the twice at least of inner surface 12a girth of the defective part of pipeline 12 among Fig. 1 D.To make hollow hoses carrier 6 can move to the position shown in Fig. 1 E when selecting the height H of base plate 3, on this position, carrier cover and with comprise a layer 1A ', the lining of 1B ' separates a distance.

But a kind of preferred hardening plasticity compound 14 is an epoxy resin.Here recommend to use the film 2 of printing opacity, because beginning, centre and final stage that the interior compound 14 of covering that can make the people of operation observe 2 formations of film shown in Fig. 1 C and Fig. 1 D like this scatters.For example, the operator can detect and eliminate bubble, and isolated not infiltrated fiber bundle and/or other defective that can be eliminated, method are with instrument 4 plastic compound to be caught up with corresponding site to the printing opacity covering.Air bubble (or bubble of other gas of bringing into) is caught up with near layer 1A ', among twist joint 1E and the close plastic compound that accumulates 5 of base plate 3 opposite sides, promptly can be eliminated it between the 1B '.

When scattering and permeating comprehensive step when finishing, open the covering that film 2 forms, make the overlapping fibrous material layer 1A ' of adhesion, 1B ' (having permeated plastic compound) becomes and can hold it in the contraction state shown in Fig. 1 E then near also being wound on the side face of carrier 6.

Before describing Fig. 1 E, needing earlier, contrast Fig. 2 A to 2D introduces a succession of different step that preparation can be wound on the multilayer lining on the sort of expansible and carrier that shrinks shown in Fig. 1 E label 6.

Shown in Fig. 2 A, an independent fibrous material layer 1a is covered with that part of above the covering base plate 3 of transparent membrane 2.But use layer of even or hardening plasticity compound coat heterogeneous on independent fibrous material layer 1a exposes.The second independent fibrous material layer 1b is placed on plastic compound 14 coatings on the first floor 1a, but top layer of even or hardening plasticity compound 14 coatings heterogeneous (Fig. 2 B) also coated of second layer 1b.Film 2 is folded on the double-deck lining that obtains like this and contains a layer 1a to form to encase fully, the covering of the lining of 1b and two plastic compound 14 coatings, but wherein hardening plasticity compound is scattered come each part with instrument 4 with each layer that permeates double-deck lining.Some plastic compounds are extruded lining and form the plastic compound that accumulates 5 that wraps in the covering that folding film 2 constitutes.Open covering (Fig. 2 D) then, expose lining, comprise that the fibrous material layer 1a ' that permeates plastic compound and the lining of 1b ' can be wound onto on the sort of carrier 6 shown in Fig. 1 E thereby make.

Shown in Fig. 2 E, the plastic component of the tubulose shell of radial dilatation is hardened, and the tubulose shell adheres on the inner surface 12a of pipeline 12, the plastic compound of a certain amount of sclerosis or claim charges 10 to infiltrate and sealed crack 13 on pipeline 12 walls.Label 11 represent radial dilatation and the sclerosis at the relevant axial end place of the tubulose shell 1d that stablized the plastic compound ring, such ring has formed the positiver sealing of fluid media (medium) (as the sewage) infiltration that opposing carried between the external surface of the inner surface 12a of pipeline 12 and the tubulose shell 1d that expanded.In addition, ring 11 has also formed smooth transition between the inner surface of inner surface 12a and the tubulose shell 1a that expanded.

Shown in Fig. 1 E, the transfer device that makes carrier 6 radially expansible and that shrink move into and shift out the selected part of pipeline 12 has a cylindrical metal core 15, carrier 6 overlaps thereon, and metal-cored 15 are provided with the also visible Fig. 3 A of two couples of leg 8(and the 3B of carrying roller 9).Carrier 6 can be made by firm withstand voltage wear-resisting elastomeric material, for example, can be one section rubber hose or one section flexible pipe that elastoplast is made.The elastomeric material of carrier 6 can but needn't always lean on any known mode to reinforce, this point is to depend on that carrier is for to the inner surface 12a of pipeline 12 expansion and force the size of the stress that the tubulose shell 1D of expansion must bear with suitable joint of inner surface of pipeline 12a of needs reparation.

For example, can the axial end portion 16 of carrier 6 be fixed in the neighbouring part of cylindrical core 15 hermetically, guarantee that doughnut 6a and the atmospheric sealing ground between carrier and core separates with the band 16 that is made into or other suitable material.Being used to make the medium of the carrier expansion between the axial end portion 16 of two sealings can be liquid or gas (for example air).The input unit of pressure fluid being imported doughnut 6a has a pipe 17, pipe 17 be connected in suitable source of pressurised fluid and be equipped with one or more be used for regulating fluid is sent into chamber 6a maybe will discharge the valve (drawing) of chamber 6a with the fluid of crossing.

Every layer of lining 1d or 1D can comprise the glass fiber of raw glass fiber and one deck adhesive-free, with the polyester line latter are sewn on the former.The extraordinary lining of effect can comprise one layer or more, and every layer all contains the first floor (every square metre contains 550 gram glass fiber) and the second layer (for example cloth or pad), and the second layer contains 450 gram glass fiber for every square metre.The thickness of lining 1d or 1D needn't surpass 1mm.This material preferably uses E-CR glass, because can bear the corrosiveness of the fluid of being carried in being repaired pipeline 12.

As previously mentioned, but hardening plasticity compound 14 can be can solidify at normal temperatures or for beginning or promote to solidify must heating epoxy resin.Plastic compound can contain the characteristic that one or more additives improve or produce certain needs.For example, plastic compound can contain a kind of suitable couplaut with the performance on the wet inner surface 12a that improves lining 1d or 1D and adhere to pipeline 12.When method of the present invention be used to repair a minimum part be embedded in underground, when being used for carrying the pipeline of sewage and/or other liquid, this point particular importance.Preferably also in plastic compound, be added to the degasser of when young measuring forms bubble in tubulose shell 1d or 1D with minimizing possibility.Every kind of additive above-mentioned can be a kind on sale on the market.

If directional fiber percentage is higher in the fibre reinforced plastics, its intensity is also higher so.This point also is applicable to glass fiber, carbon filament and KEVLAR(trade mark) fiber.In the lining of preparing formation tubulose shell 1d or 1D, preferably use above-mentioned fiber and silk.This tubulose shell preferably adopts more firmly or very firm still also very thin tubulose shell, because can bear the stress that adds wide seam 13 in the underground pipeline broken parts.Should remember that the tubulose shell that moves into can reduce effective internal diameter that pipeline 12 is repaired part, thereby constitute the factor that flows that hinders.Thin or as thin as a wafer, but still the tubulose shell that can seal underground pipeline 12 defective parts can constitute the hindering factor to flowing hardly, thereby do not influence or the flowing of flowable mass (as sewage) that not appreciable impact is carried in being repaired pipeline.

When suitable checkout gear (television camera 18 as shown in Figure 6) when having determined in underground pipeline, to have defective part, with required size, but the lining (1A '+1B ' or 1a '+1b ') that soaks into suitable hardening plasticity compound 14 is wound on the carrier 6 of contraction, therefore, formed tubulose shell 1d or 1D formation have at least puts in order the more spirality of circle than one, preferably has the spirality that at least two whole circles add the part of another circle.Every circle can be by individual layer, and bilayer or multilayer are formed.One winch or another kind of suitable transfer device are used for transferring carrier 6 in underground pipeline 12 and reel tubulose shell 1d or 1D on it, and therefore, the tubulose shell is sent to the defectiveness position of pipeline and screen and correct location by observation television video camera 18.Can replace winch with the drive of motor video camera, the drive of motor video camera automatically transports carrier 6 in underground pipeline 12, and when the tubulose shell is correctly located in the pipeline defectiveness position that need are repaired, makes the tubulose shell stop to move.Pipe 17 is connected in a pressurized gas source or pressurized fluid source (Fig. 6) by flexible pipe 117, can control chamber 6a in the pressure fluid turnover carrier 6 by one or more valves.When the external surface of tubulose shell of expansion begins to contact hermetically with the inner surface 12a of pipeline 12, carrier 6 with and on the tubulose shell promptly finish expansion.In tubulose shell 1d that is limited and has been expanded or 1D and thereon, plastic compound 14 solidifies required interval can be selected from very high accuracy in advance.Therefore, if (when for example charging into chamber 6a with hot gas or hot liquid) lacked at this interval, so, carrier 6 is shunk and from the pipeline of being repaired like this 12, withdraw from.

Have been found that if contain one deck but suitable film such as the polyethylene sheeting of multilayer (for example two-layer) preferably, just can obtain the effect of feeling quite pleased like that at carrier 6 with around thereon tubulose shell 1d or the film 7 between the 1D.The corresponding axial end that is connected in carrier of (being wound on and having limited whole carrier 6) film 7 sealed at both endsly when guaranteeing tubulose shell (1d or the 1D) radial dilatation when carrier and encirclement carrier, the film of coiling can fully not hold around.At the device of two axial ends of carrier 6 sealing coiling film 7 can be the bar that scribbles bonding agent, band etc., and perhaps, the innermost layer of the film 7 of coiling or each layer also can be fixed on the leg 8 of roller 9.

In order to make lining 1A '+1B ' or 1a '+1b ' formation tubulose shell 1D or 1d, can guide carrier 6 to make it occupy tread support membrane 2, a position on the front end face of the base plate 3 of lining 1A '+1B ' or 1a '+1b ' and film 7, and make carrier 6 close on the joining edge part of lining.Make then carrier 6 above lining leaving or to roll towards the people's with the aid of pictures of Fig. 1 D or 2D direction, thereby make lining form the tubulose shell 1D and the 1d of the profile of the carrier of closely following contraction.Before by this way lining being become tubulose shell 1D or 1d, film 7 can be wound on the carrier 6.Because roller 9 is outside the axial end of carrier 6, roller 9 does not form obstruction in the process that lining is become the tubulose shell.Carrier 6 suitable transports dolly can have the metal-cored 15(of a tubulose or made by other suitable material) and four rolling 9, at each metal-cored axial end two rollers are arranged respectively.When installing and select the diameter of roller 9, can not make the inner surface 12a(of carrier 6 and/or the tubulose shell 1D on it or 1d contact pipeline 12 see Fig. 1 E).In Fig. 1 E, the distance between the external surface of tubulose shell 1D and the end face of base plate 3 is D.

In a single day the step of coiling lining is finished on carrier, and carrier 6 promptly is ready to move within the pipeline 12, and this can pass through winch, also can finish by the drive of motor television camera.Move into being operated in the pipeline of carrier 6 and carry out, for example in one of described pipeline 112 of Fig. 6, carry out.

When carrier 6 and the tubulose shell 1D on it or the base plate 3 of 1d from Fig. 1 E are removed, folding film 2, but make itself and hardening plasticity compound 14 contacted surfaces be positioned at the inboard of the overlapping layers of formation.Overlapping layers is lifted away from base plate 3 and handles in acceptable mode on the ecology.Plastic compound accumulate or soft in the short time (for example 2-3 hour) sclerosis in case simplification to overlapping layers (comprise the film 2 that folds and interior in contained thing) processing.

Carrier 6 and the tubulose shell on it are ready to move into pipeline 12, promptly move into the defective position of pipeline.Such immigration is undertaken by transfer device, and transfer device comprises pipe 15 and roller 9 thereof, observes the handover process of carrier 6 during immigration on the screen of television camera 18.By pipe 17 gas-pressurized or liquid are sent into chamber 6a then, make carrier 6 and on tubulose shell expansion.The expansion of tubulose shell 1d or 1D makes a layer 1A ', 1B ' or 1a ', and the lap of 1b ' produces mutual slip.For example, if the internal diameter of pipeline 12 is 400mm, then carrier 6 can that is to say about 350mm at the external diameter of expansion state not, significantly less than the internal diameter of pipeline.The girth of tubulose shell 1d or 1D can that is to say that Kuo Zhang tubulose shell 1d or 1D are not spiralitys with 2 whole circles for about 350mm * π * 2=2200mm.The girth of the inner surface 12a of the pipeline 12 of internal diameter 400mm is 1256mm.Therefore, when contacting when tubulose shell 1d or 1D expansion and with inner surface 12a, its each circle degree of overlapping reduces to 1.75(2200 from 2: 400 π=1.75).The not calculating of Kuo Zhang tubulose shell girth will be considered the degree of overlapping of each circle that the tubulose shell expansion back of the internal diameter of defectiveness pipeline and spiral wound is required.

As shown in Figure 3A, carrier 6 and tubulose shell are in the rejected region of pipeline 12.Rejected region comprises the joint between 12 liang of adjacent segments of pipeline, and this rejected region has in 13, two sections in two cracks each one.Carrier 6 is not expansion as yet, that is to say between the external surface of tubulose shell 1d and the side opposite 12a gap is arranged still.Film 7 is placed on as yet not between the external surface of the carrier 6 of expansion and tubulose shell 1d.

Shown in Fig. 3 B, pipeline may also have other crack 13.These cracks can perhaps replace the tubulose shell 1d shown in Fig. 3 A and the 3B to seal with a longer tubulose shell 1d or a 1D by second tubulose shell 1d or 1D sealing.

Shown in Fig. 3 C, when expansion step was finished, the tubulose shell 101d of the screw winding of expansion had the part of two whole circles and the 3rd circle.Degree of overlapping between a whole circle externally and the 3rd circle part is indicated by angle [alpha].Every circle of the tubulose shell 101d of expansion has two-layer.The part circle closes on the inner surface 12a of the pipeline 12 that 3 cracks 13 are arranged.Every crack 13 all is filled with a plastic compound 10 that has hardened.

Use has the tubulose shell 1d of first thickness, 1D or 101d repair the first selected defectiveness position of pipeline 12, and repair second of same pipeline with the tubulose shell with second different thickness and select the defectiveness position, above-mentioned situation belongs to scope of the present invention equally.Tubulose shell with different-thickness can make that (as the layer 1a of layer 1A+1B or Fig. 2 B of Figure 1A, 1b), method is to select the size of layer with commaterial.Therefore, the tubulose shell of coiling can have one, two, three, four or more whole circle (if necessary) add the part of next circle.In order to expand thin or thicker tubulose shell 1d, 1D or 101d need not to change the pressure among the 6a of chamber.Tubulose shell with different-thickness also can make by following manner, and promptly apparatus has the lining of the required number of plies to make, but every layer is all permeated the hardening plasticity compound.For example,, on layer 1a, add a layer 1b, also can on layer 1b, add the 3rd layer again so that increase the thickness of the lining shown in Fig. 2 D, thereby also increase the thickness of the tubulose shell 1d shown in Fig. 2 E with reference to Fig. 2 B.In many cases, the size of lining can be selected like this, that is, make the girth of the tubulose shell of having expanded equal to wait to repair 2 parts that extraordinarily go up the 3rd circle of the inner surface 12a girth of pipeline 12, and the circumferential lengths of this part is 100mm.So just can make the sort of tubulose shell 101d shown in Fig. 3 C.

Select carrier 6 and in the tubulose shell process of expansion and when just having expanded the pressure of gas among the chamber 6a of back or liquid, must consider and will avoid further damaging defective pipeline 12.Therefore, but to still be enough to guarantee that at one the tubulose shell expands reliably and contact the inner surface 12a of pipeline 12 and infiltrate some hardening plasticity compounds 14 and don't cause on any or any minimum pressure of significantly widening in crack in crack 13 to the pressure limit among the 6a of chamber.

Tubulose shell 1d, the size of frictional force can calculated in advance between the adjacent turn of 1D or 101d, especially under the situation that the circumferential lengths (for example 100mm) of the whole number of turn and additional circle part has been known in advance.In carrier 6 and tubulose shell process of expansion, slip each other will take place between the lap of helix shell.Multilayer tubular shell adjacent turn move just or outermost (not exclusively) circle that in fact just occurs in the tubulose shell partly and between the adjacent whole circle 19 in the weight district 20.But because frictional force calculated in advance, especially the tubulose shell is when pipeline 12 intramedullary expansions with normal inner diameter and tubulose shell have the standard axial length, therefore, for guaranteeing that further damage that the predetermined expansion of tubulose shell do not cause pipeline defectiveness position is quite simple to the calculating of the pressure of fluid among the 6a of chamber.In addition, set up the pressure that accurately calculates in the 6a of chamber, this assurance makes the external surface of the tubulose shell of expansion prop up the inner surface 12a at pipeline 12 defectiveness positions with predetermined power.When selecting the pressure of fluid among the 6a of chamber, guarantee that the adjacent turn of helix shell in carrier 6 processs of expansion can be slided each other relatively, will guarantee that also the tubulose shell of expanding conflicts on inner surface 12a with the power of preliminary election.

Because pressure fluid inlet chamber 6a, thereby carrier 6 can be around its rotational in process of expansion.The degree of carrier 6 angular displacements is carrier that shrinks and the function of expanding the difference of diameter between the carrier in expansion step.We can say that carrier is the defectiveness position that oneself screws in pipeline 12.The rotation of carrier 6 is attributable to the remarkable frictional force (but the inner surface of the inner surface monofilm 7 of film 7 also can be the inner surface that inserts the innermost layer of the film 7 between carrier and tubulose shell) between carrier external surface and film 7 inner surfaces in process of expansion.The carrier 6 of expansion and the tubulose shell 1d on it are shown in Fig. 4 A and 4B fully.We can say that film 7 has constituted prevents that carrier 6 is relative to tubulose shell adjacent turn is rotated and the latter rotates relative to the former connection.

Tubulose shell 1d, 1D or 101d make the thickness of tubulose shell that reducing to a certain degree be taken place in company with the expansion of carrier 6, and this is at least partly owing to the mutual slip of helix body adjacent turn.This makes some plastic compounds radially outward clamp-on the defectiveness position of pipeline 12 on every side from the tubulose shell of expansion.In addition, plastic compound is extruded from the axial end of tubulose shell and is formed smooth transition district 11(Fig. 2 E).

Make carrier 6 remain on expansion state until at each circle of tubulose shell, after the plastic compound sclerosis in crack 13 and the transition region 11.As mentioned above, in fact plastic compound 14 sclerosis required times can move into the temperature of step tubulose shell of expansion finish the time and select arbitrarily to the additive of basis (as epoxy resin) and/or by suitable selection by suitably selecting.

Plastic compound 14 sclerosis in a single day can shrink carrier 6 by pipe 17 discharge pressurized liquid, and withdraw from from pipeline 12.Because film 7 adheres on the carrier in the contraction process, and be easy to and the sclerosis of the tubulose shell expanded plastic compound be separated, so be unchallenged the separating of tubulose shell of the carrier 6 that shrinks and expansion.

Carrier 6 is ready to withdraw from by roller the pipeline 12 of reparation then, and input reuses or the stock is stand-by.Transition region (shown in label 11 among Fig. 2 E) between the pipeline 12 of the axial end of tubulose shell of expansion and reparation is smooth, and tubulose shell thin or expansion as thin as a wafer is very little or almost do not have a resistance to the flow resistance of the fluid (as sewage) that is transferred.The plastic compound of sclerosis has improved the steadiness of the tubulose shell of expansion, seals up the axial end of tubulose shell reliably and in the crack 13 of tubulose shell periphery.

Best flowing of the fluid of blocking-up by pipeline 12 in the process of repair.Almost do not have resistance because transfer 15 pairs of flowing of fluid of core of the transfer device of carrier 6 by the pipeline rehabilitation part, within the tubulose shell of place expansion and on plastic compound once curing, can begin flowing of fluid.Drawn among Fig. 4 A and just finished and when not withdrawing from carrier 6 as yet, at pipeline of repairing 12 and the fluid level (FL) in the core 15 in repair.

Here recommend to use polyethylene sheeting 2 and film 7,, and can ecologically go up the epoxy resin that sclerosis was concentrated and handled to acceptable manner because acceptable manner is used epoxy resin on like this can physiology.So in any stage that forms the tubulose shell and/or the work of immigration, the operator need not to contact flowable plastic compound.

The tubulose shell 1d of the immigration that Fig. 5 is illustrated in the work of withdrawing from carrier when finishing.As shown in Figure 5, in the sclerosis of the tubulose shell 1d axial end of expansion the plastic compound ring between the inner surface 12a of the inner surface of tubulose shell 1d and pipeline 12, formed smooth transition region 11.

Fig. 6 is illustrated in complete buried pipeline 12 between the two adjacent pit shafts 112, and pit shaft 112 can lead to the adjacent part of pipeline.Usually the situation of Fa Shenging is, some positions defectiveness of pipeline 12 between two pit shafts 112, thereby each position all must be repaired with an independent tubulose shell that needs axial length.In Fig. 6, in the pipeline section of 112 in two pit shafts, there is its transfer device of carrier 6(of four expansions not omit picture).Flexible pipe 117 is to the gas of the chamber of each carrier 6 6a feed pressurization or liquid and output was used from the 6a of chamber fluid, and flexible pipe 117 is sent into and is connected on the suitable source of pressurised fluid from one of pit shaft 112.The flexible pipe 117 that can see the chamber 6a that leads to the most right-hand carrier 6 of Fig. 6 passes other three carriers 6 in the pipeline 12, for from the right side several second carrier send into two carriers that 117 of the flexible pipes of discharging fluid pass adjacent left-hand pit shaft 112, by that analogy.Before sending into four carriers shown in the figure in the pipeline 12, can earlier selected carrier be sent into or be passed to flexible pipe 117.Television camera 18 is with carrier 6(that newly sends into and the tubulose shell on it) advance, so that the tubulose shell is correctly located, then television camera 18 is returned to the shown position of preparing to send into next carrier 6 by one of pit shaft 112 in the selected defectiveness position of pipeline 12.Carrier 6 can be one by one, that is to say, expanded in the process of the carrier of following below sending into, and finishes the needed time of repair between two pit shafts 112 thereby shorten.Each carrier be independent of other carrier finish the expansion be possible, this be because each chamber 6a can accept gas-pressurized or liquid by independent flexible pipe 117.Therefore, a specific tubulose shell can harden, and other tubulose shell is being admitted to the defectiveness position of pipeline 12 or is just expanding in the defectiveness position of pipeline 12 at this moment.This point needs are sent into and expand two or more tubulose shells repair finished crucial meaning rapidly.The tubulose shell of having sent in addition and having expanded does not disturb sending into of other one or more tubulose shells and expands.

Under many occasions, recommend to use polyethylene sheeting and film, because the frictional force between the external surface of the expansible carrier of elastomeric material and the polyethylene film adjacent surface is greater than helix shell 1d, 1D or 101d soak into plastic compound in frictional force between circle and the film 7 add frictional force between the tubulose shell.To make turn-to-turn initial overlapping of film be enough to prevent expanded so that tubulose shell direct contact between tubulose shell and the carrier when propping up the inner surface 12a of pipeline 12 during the size of selective membrane 7 when carrier.Therefore, in carrier 6 radial dilatation processes, the adjacent turn of the film 7 of twist up can be slided mutually relatively, but continue to constitute the external surface of the carrier of expanding and constitute tubulose shell 1d, the spirality lining of 1S or 101d in the obstacle that contacts between the circle.Owing to do not slide with respect to carrier in the end of that circle of the external surface that is in close proximity to carrier 6 of film 7, and the lap of film 7 slides in the carrier process of expansion mutually relatively, thereby in expansion step, carrier is forced in the pipeline and rotates, as previously mentioned, the degree of the angular displacement of the carrier of expansion depends on the poor of expansion step front and back carrier external surface girth.The rotation of (in the carrier process of expansion) carrier 6 in pipeline 12 be need with favourable, because this can guarantee to make the circle of the tubulose shell of spiral wound to slide relatively each other, thereby and in the radial dilatation process inner surface butt of tubulose shell and pipeline 12 density of tubulose shell is increased to some extent.Hardenable plastic compound 14 thus radially outward extruded the tubulose shell of expanding side face and with sealed contact of inner surface 12a of pipeline 12, and penetrate crack 13, plastic compound promptly forms reliable sealing function once solidifying.

The peripheral surface of the tubulose shell of radial dilatation and axial end extrude at least some hardenable plastic compounds be need with favourable, because this can be avoided the excessive pressure of effect on the inner surface 12a of pipeline 12.Can reduce the possibility that pipeline 12 further damages (for example crack 13 is widened) like this, but because in the process of carrier 6 radial dilatation, can from the tubulose shell, extrude at the hardening plasticity compound of transition region 11 and the very high percentage that needs in 13 places, crack.

Need not further analysis, for previously described main points of the present invention, other people are easy to use existing knowledge, make various adaptations in various occasions, but can not exceed feature of the present invention, to be us make the basic and concrete aspect of contribution to this specialty to these features, and therefore, such adaptations can not exceed the application's claims institute restricted portion.

Claims

1, the method from repairing to the inside at least one selected position of the buried pipeline of small part, described at least one selected position has at least one crack or a similar defect area, and this method has following steps: contain the lining of one deck fibrous material at least but use the hardening plasticity compound to soak into; The lining that will soak into is wound on the tubulose shell that has lap and first, second axial end on the radially expansible and carrier that shrinks with formation; Set up significant friction between carrier and the tubulose shell, thereby the radial dilatation of carrier makes tubulose shell while radial dilatation and is accompanied by the mutual relative slip of lap; Carrier and tubulose shell are sent at least one selected position of pipeline; In at least one selected position of pipeline and facing to this at least one selected position expansion carrier and tubulose shell, be accompanied by generation (1) but towards the hardening plasticity chemical combination logistics of described at least one defect area, (2) carrier is with respect to the rotation of pipeline; Shrinking carrier makes the carrier of contraction separate with the tubulose shell of expansion; From the tubulose shell, withdraw from the carrier of contraction; And hardenable plastic compound is solidified.

2, in accordance with the method for claim 1, it is characterized in that: described expansion step also comprises the described lap of mutual compressing, extrudes hardenable plastic compound from least one axial end of tubulose shell of expansion.

3, in accordance with the method for claim 1, repairing has at least one selected position to the buried pipeline of small part of pre-determined inner diameter, it is characterized in that: described coiling step comprises that the lining that will soak into is wound on the tubular carrier, significantly less than the external diameter after the expansion, described expansion step comprises internally expands tubular carrier with pressure fluid to the external diameter that carrier is had before described expansion step.

4, in accordance with the method for claim 3, it is characterized in that: described coiling step comprises makes a tubulose shell with the lining that soaks into, and selects the length of tubulose shell to make described carrier exceed two axial ends of tubulose shell.

5, in accordance with the method for claim 1, it is characterized in that: the step of described foundation friction is included in and introduces a polyethylene film between described lining and carrier.

6, in accordance with the method for claim 5, it is characterized in that: described send into step be described soak into step after, carry out before the described coiling step.

7, in accordance with the method for claim 5, it is characterized in that: described coiling step comprises makes body with described film, and body surrounds carrier and exceeds carrier in the axial direction.

8, in accordance with the method for claim 1, it is characterized in that: the step of described foundation friction is included in and introduces a multilayer polyethylene film between described lining and the carrier.

9, in accordance with the method for claim 8, it is characterized in that: described coiling step also comprises makes body with described multilayer polyethylene film, body surrounds carrier and exceeds carrier in the axial direction, and with two axial ends of body be fixed on the carrier with prevent the process middle tube body of carrier radial dilatation open around.

10, in accordance with the method for claim 1, it is characterized in that: described coiling step comprises makes the spirality with many circles with described lining.

11, in accordance with the method for claim 10, it is characterized in that: described spirality has the part that many whole circles add a circle.

12, in accordance with the method for claim 1, it is characterized in that: described lining contains the overlapping layer of many fibrous materials, and described coiling step comprises described lining is made the spirality with many circles.

13, in accordance with the method for claim 1, it is characterized in that: described expansion step comprises introduces the fluid with pressure in carrier, described pressure is the function of many parameters, and these parameters comprise makes the tubulose shell be pressed in the character of fibrous material in the degree of desired carrier expansion on the pipeline and the lining with predetermined dynamics.

14, in accordance with the method for claim 13, it is characterized in that: the circumferential lengths of the lining that another described parameter is reeled.

15, in accordance with the method for claim 1, it is characterized in that: the range of choice of the fibrous material of described lining comprises glass fiber, carbon filament and KEVLAR(trade mark) fiber.

16, in accordance with the method for claim 1, it is characterized in that: described step of soaking into is included on many layer fibrous materials and applies hardenable plastic compound; Described many layer fibrous materials are stacked together mutually; Overlapping fibrous material layer and the plastic compound that is applied are included in the covering of a polyethylene film; And on the direction that makes plastic compound permeable fiber material layer to the external force that applies of described covering.

17, in accordance with the method for claim 16, it is characterized in that: described film is a printing opacity.

18, in accordance with the method for claim 16, it is characterized in that: the described step that applies external force is to use rolls that pin is manual to be spread out plastic compound in covering.