CN109237196A - Pipeline lengthen the life layer, lengthen the life pipeline and pipeline is lengthened the life technique - Google Patents
Pipeline lengthen the life layer, lengthen the life pipeline and pipeline is lengthened the life technique Download PDFInfo
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- CN109237196A CN109237196A CN201811221975.1A CN201811221975A CN109237196A CN 109237196 A CN109237196 A CN 109237196A CN 201811221975 A CN201811221975 A CN 201811221975A CN 109237196 A CN109237196 A CN 109237196A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
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- General Engineering & Computer Science (AREA)
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Abstract
Lengthen the life layer the invention discloses a kind of pipeline, be set to inner wall of the pipe, the layer of lengthening the life is the erosion resistant coating after ultraviolet light solidify, it radially extends rate as 2.4-3.2% before solidification, axially extending rate≤2%, maximum working pressure (MWP) 1MPa after solidification.Lengthen the life layer the present invention provides a kind of pipeline with good anti-corrosion effect, and provide the pipeline of the construction technology and application of the layer of the lengthening the life layer of lengthening the life, layer of lengthening the life in the present invention is particularly suitable for the anti-corrosion of concrete pressure pipeline of the end equipped with steel flange arrangement, its service life can effectively be extended, aqueous medium is thoroughly isolated with concrete duct, prevents corrosion.
Description
Technical field
The invention belongs to corrosion-resistant fields, and in particular to a kind of pipeline lengthen the life layer, layer of lengthening the life using this lengthen the life pipeline and
Pipeline is lengthened the life technique.
Background technique
Concrete duct is one of the most common type in existing aqueduct, in all water transferring lines, concrete plug
Cost is minimum, intensity is high, rigidity is good, equipment investment is small, therefore receives user in the market and widely welcome.But due to mixed
Solidifying soil inner wall of the pipe is coarse, interface easy to leak, easily by acid medium burn into easily breeds Thallophyta, and application also receives non-
Often big limitation.In order to extend the service life of concrete duct, in the prior art often using antiseepage aseptic technic to its into
Row processing, mainly includes following methods:
(1) by spraying waterproof material on the inner wall and outer wall of concrete duct or preparing erosion resistant coating, thus
The waterproof membrane with certain ductility, elastoplasticity, crack resistance type, impermeability and weatherability is formed on concrete duct inside and outside wall,
Play the role of the waterproof, seepage control to concrete tube body itself.
(2) in the preparation process of concrete duct, the waterproof of permeable crystallization type is directly added into the proportion of concrete
Material, such as macromolecule polymer material reach to play the pore structure for improving inside concrete and hinder external water molecule
Cause effect of the harmful substance of corrosion to pipe of concrete internal penetration with other.
In the above method, the leakage and etching problem that the waterproof material of internal doping type generates concrete structure crack are several
Effect is not had, and the roughness of inner wall of the pipe is not affected, the service efficiency of pipeline is unable to improve, so existing
In technology, carrying out preservative treatment to the inside and outside wall of concrete duct becomes the technique of lengthening the life of main concrete duct.It is existing
In technology, to concrete duct carry out anti-corrosion life-extension treatment method mainly include cement mortar squeezing and coating method, CIPP Internal Lining Method,
HDPE pipe insertion lining method.Cement mortar squeezing and coating method is as its name suggests that the generation of concrete duct surface is filled up using cement mortar
Gap or crack, to have the function that anti-corrosion is lengthened the life.The shortcomings that cement mortar squeezing and coating method, is that cement mortar itself causes
Density is limited, and the effect played is very limited, and is difficult in the construction process levelling, and construction wrong will lead to pipeline water delivery
Efficiency reduces.
HDPE pipe insertion lining method is outer diameter to be equal to or slightly less than in the high density polyethylene (HDPE) of internal diameter of the pipeline to be repaired
Internal lining pipe is become U-shaped, and by 30% or more the reduced cross-sectional of internal lining pipe, pass through by dedicated U-shaped press device by bushing pipe
The processes such as winding sizing, traction pull in, external force is restored are combined together bushing pipe tightly with inner wall of the pipe, to be formed to old
The reparation of inner wall of the pipe avoids the diminution to original pipe diameter to greatest extent.The phase compared with HDPE pipe insertion lining method
As technique there are also stainless steel tube Internal Lining Methods etc..HDPE pipe insertion lining method although repair ability is strong, in application still by
Limit, the reason is that this method needs all fronts pipeline to be replaced, complex disposal process is especially thick in pipeline length, caliber
In the case where, construction technology is especially complicated, and due to being the compound of two kinds of pipelines, HDPE pipeline and original concrete duct
Between the degree that is tightly combined be difficult to be controlled, the small anti-corrosion that will cause of binding force is invalid, and binding force can then bring greatly pipeline negative
Press through big problem.
CIPP Internal Lining Method, which is called, does in-situ solidifying method, is one kind during pipe lining is repaired, mainly passes through ultraviolet radiator
The hose that irradiation has been soaked with specific resin makes resin carry out deep cure, Lining Hose is made to be placed in a kind of novel height in old pipe
The pipe lining repair mode of effect.Prefabricated hose is mainly dragged in inside the old pipeline for needing to repair by its process flow, then
Solidification lamps and lanterns are put into inside hose inner membrance, are respectively blocked the installation blind plate at hose both ends, last tube is turned on light solidification.CIPP
Method has application in the work of the pipeline corrosion protection reparation of many special dimensions, for example, adopting in nuclear power station since repairing effect is good
When using steel production route as seawater pressure aqueduct, since the osmosis of chloride ion can be to concrete duct inside
Steel plate, the reinforcing bar of sealing generate corrosiveness, infiltration or pipeline breaking situation occur, to seriously affect steel cylinder concrete
The service life of pipeline, especially such pipe design service life are generally 30 years and are set to underground pipe gallery or buried, and electric
Service life of standing is generally 40 years to 60 years, is far from satisfying power plant's operation demand.The prior art occur seeping water in pipeline or
Under corrosion condition, when defect is smaller, rejected region concrete is cut in unit maintenance period of reloading, material is repaired using concrete
Material (cement mortar, polymer mortar etc.) repair, when defect expand when, unit reload the maintenance period carry out local replacing
(factors such as space, environment cause generally accomplish integral replacing), integral replacing can be accomplished using in-situ solidifying rule.
But in above-mentioned application, CIPP method is still had the following problems:
1, the material of liner often uses the combination of polyester fiber and resin, the problem of due to intensity itself and performance, Gu
The liner layer bearing capacity formed after change is insufficient, is easy to cause liner layer to collapse, bulge, rupture；
2, the solidification temperature of liner determines the solidification effect of liner layer, once solidification effect is bad, then integrated artistic report
It is useless, cause construction cost to rise violently；
3, liner solidification after, the volume of inner lining material can generate a degree of variation, be easy to cause pipe lining layer with
Duct wall combination is not close, especially the combination in pipe ends portion, once dealing with improperly, it will cause the internal layer at both ends and pipes
It intakes between road wall, whole pipeline corrosion protection technique of lengthening the life is made to lose meaning.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides one kind for solidifying inner lining in the prior art into
The pipeline of row improve and perfect is lengthened the life layer, and is provided a kind of application pipeline and lengthened the life the pipeline of lengthening the life of layer, and is additionally provided simultaneously
The process that a kind of pair of pipeline is lengthened the life.
Present invention technical effect to be achieved is realized by following scheme:
Pipeline provided in the present invention is lengthened the life layer, and inner wall of the pipe is set to, and the layer of lengthening the life is the anti-corrosion after ultraviolet light solidifies
Layer, the rate that radially extends are 2.4-3.2%, axially extending rate≤2%, maximum working pressure (MWP) 1MPa.
Further, the radial dimension at layer both ends of lengthening the life is greater than the radial dimension of other positions.
Further, the layer of lengthening the life is tubular, and entire outer diameter is less than internal diameter of the pipeline to be repaired before ultraviolet light solidifies
0.5-3%, ultraviolet light solidify after layer of lengthening the life with a thickness of 3-15mm；Length is greater than to be repaired before layer ultraviolet light of lengthening the life solidifies
Duct length；The layer of lengthening the life successively includes inner membrance, fiber and resin mixed layer, outer membrane, clad from the inside to the outside；The inner membrance
With outer membrane with a thickness of 0.1-1mm, the coating thickness is 0.1-0.5mm.The inner membrance, outer membrane, clad are macromolecule
Material, and the clad has the function of obstructing ultraviolet light；The fiber and resin mixed layer be fibrage at sizing
Fabric impregnates the mixed layer that UV-cured resin is formed.
Layer provided in the present invention of lengthening the life is set to the inner wall of pipeline to be repaired by special technique, radial and axial at it
With different elongation percentage, compared with liner in the prior art, it is bigger that the layer of lengthening the life in the present invention radially extends rate, makes to lengthen the life
Layer is in inflation, can bear bigger pressure in solidification process, thus being bonded more closely with pipeline to be repaired, while axial direction is prolonged
Rate control is stretched lower than 2%, and making to lengthen the life, deformation is unlikely to excessive to layer in the axial direction, and influence is lengthened the life thickness degree.
In layer of lengthening the life of the invention, the thickness of inner membrance, fiber and resin mixed layer, outer membrane and clad theoretically can root
According to needing to carry out calculating setting, in actual use, inner membrance and outer film thickness are preferably 0.1-1mm, and coating thickness is excellent
It is selected as 0.1-0.5mm, above-mentioned thickness setting is so that the structure sheaf footprint for not playing main anti-corrosion life-prolonging function is small, still
It can satisfy use demand again.Inner membrance, outer membrane can be polyethylene, high density polyethylene (HDPE), polyvinyl chloride, wherein excellent on the outside of inner membrance
The holding hair side of choosing increases layer of lengthening the life so that more firmly bonding is integrally formed with fiber and resin mixed layer after hardening
Voltage endurance capability.Choice of Resin in fiber and resin mixed layer uses the commercially available epoxy acrylic tree containing light triggering agent
Rouge, polyurethane acrylic resin, unsaturated light thixotropic polyester and its mixture type UV-cured resin.Clad is main
Purposes be for stopping ultraviolet light, the layer that makes to lengthen the life be in front of curing it is flexible, clad can be opaque polyethylene, highly dense
Spend polyethylene, polyvinyl chloride or itself and fiber composite film, be mainly used for liner hose transportational process stop ultraviolet light and
Protect hose from mechanical damage.
It additionally provides one kind in the present invention to lengthen the life pipeline, the pipeline body is concrete pressure pipeline, and pipe end is set
Steel flanges are set, the inner wall of the pipe uses layer of lengthening the life as described above.Layer of lengthening the life in the present invention is particularly preferably suitable for
End connects the concrete pressure pipeline to form pipeline using steel flanges, makes steel flanges avoid contacting with layer of lengthening the life, in turn
The gap of water flow intrusion flange and layer intersection of lengthening the life, causes stealthy corrosion during avoiding pipeline from being on active service.
It is additionally provided in the present invention using above-mentioned layer of lengthening the life as the technical matters of inner wall of the pipe erosion resistant coating.Provided pipe
Road technique of lengthening the life includes the following steps:
Step 1, ultraviolet light are lengthened the life the preparation of layer before solidifying: according to size compatible with internal diameter of the pipeline to be repaired and length
Fibrage is bonded into compatible tubular inner membrance at the fabric of tubular structure, by plastic film by degree, and then fabric is arranged
It is coated on the outside of inner membrance, fabric is impregnated into ultraviolet curing type resin, roller rolls removal additional air and adjusts to setting
Then thickness coats plastic cement diaphragm on the outside of fabric and forms outer membrane, cover the clad of one layer of isolation ultraviolet light in outer membrane face；
Layer both ends of lengthening the life of above structure are closed using sealing end lid, the sealing end is covered equipped with to be opened/closed and inner membrance internal mutual
Logical venthole；
Step 2, the solidification for layer of lengthening the life: the layer of lengthening the life being prepared in step 1 is placed in pipeline to be repaired, is opened
The venthole that covers is blocked, to a layer inner inflatable of lengthening the life, the layer that makes to lengthen the life is closely attached in inner wall of the pipe, using ultraviolet lamp in layer of lengthening the life
Solidification is irradiated inside inner membrance, inflation carries out simultaneously with solidification until layer solidification of lengthening the life finishes；
Pipe end post-processing: step 3 by the extra layer cutting of lengthening the life in pipe ends portion, is polished smooth, is then utilized
Packing material containing resin carries out end-enclosed.
In the present invention, first, in accordance with the specification of scene pipeline to be repaired, the design thickness that is prefabricated in the factory, specification it is original
Lengthen the life layer (non-photocuring), then by primitive pipeline internal maintenance to smooth, without obvious sharp object, primitive pipeline inner wall of end into
Row pretreatment.The layer of lengthening the life of non-photocuring is dragged in pipeline, it is solid through ultraviolet light after inflation is tightly attached to primitive pipeline inner wall
Change, by the extra layer cutting of lengthening the life in pipe ends portion, polishes smooth, then carry out end envelope using the packing material containing resin
It closes.Further, the pipeline to be repaired carries out the screed on its both ends inner wall along caliber before adding and lengthening the life layer
Equably machinery cuts and polishes smooth；The 0.5-1.5% with a thickness of caliber that the screed is cut, the length cut be from
The inside 50-500mm of pipe end.Carrying out above-mentioned processing can make the radial dimension at layer both ends of lengthening the life after solidifying be greater than other
The radial dimension of position is not in the prior art so that the layer of lengthening the life in pipeline be made tightly to be bonded and be stuck in pipeline
The constructional deficiency of the liner integral slipping often occurred in CIPP technique greatly reduces a possibility that technique fails, is implementing
It will do it further elucidated above and explanation in example.
Further, in step 3, lengthen the life after layer ultraviolet light solidification, an extra layer both ends of lengthening the life cut off,
Excision is 5-50cm to layer end is lengthened the life with a distance from pipe end, and is no more than caliber and increases region, and will lengthen the life a layer end polishing
At the hill-like structure gradually increased from pipe end to pipeline inner thickness, then utilize the packing material containing resin to institute
A layer end of lengthening the life is stated to be closed.Traditional CIPP method is asked in addition to depositing technology stated in the background in actual use
Other than topic, there is also not wide enough the problems of use scope.Pipeline used in nuclear power station is needed using concrete pressure pipeline, pressure
Hydraulic piping end is equipped with steel flanges and forms continuous pipeline for connecting single tube.Traditional CIPP method is although can be applied to
Single tube carries out anti-corrosion and lengthens the life, but once will be by CIPP method treated single tube connects into pipeline, in the pipeline course of work, water
Stream can invade inside pipeline along the gap between flange and liner, generate corrosion to pipeline, this corrosion is more concealed, potential
Menace it is bigger, due to could not enough solve the above problems always, therefore existing CIPP method or the side similar with CIPP method
Method could not access application on concrete pressure pipeline.This step layer that then will effectively lengthen the life is kept apart with steel flanges, thoroughly
It avoids steel flanges and generates any gap between layer of lengthening the life, to effectively avoid stealthy corrosion, prevent potential corrosion failure
It threatens.
Further, in step 2, the blowing pressure 10-100kPa, the blowing pressure and pipe diameter to be repaired at
Inverse ratio.
Further, in step 2, by inflate, deflate repeatedly, pull adjustment lengthen the life layer fitting tightness and position.
The invention has the following advantages that
1, lengthen the life layer the present invention provides a kind of pipeline with good anti-corrosion effect, and provide the construction of the layer of lengthening the life
The pipeline of technique and the application layer of lengthening the life, the layer of lengthening the life in the present invention are particularly suitable for end equipped with the mixed of steel flanges structure
The anti-corrosion of solidifying soil pressure hydraulic piping, can effectively extend its service life, aqueous medium is thoroughly isolated with concrete duct, prevent rotten
Erosion occurs.
2, the pipeline technique of lengthening the life in the present invention avoids passively repairing, and primitive pipeline is isolated with seawater in advance for active,
It avoids pipeline from further corroding, achievees the purpose that extend pipeline service life.The technology is small to space requirement simultaneously, all material
Pipeline can be entered by Pipe installing hole and expansion joint installation site, implement short time limit, save a large amount of works compared with prior art
Phase avoids overhaul claim for eot bring economic loss.
3, the pipeline in the present invention lengthen the life technique use from different processing method in the prior art, after solidification being made
Layer both ends of lengthening the life radial dimension be greater than other positions radial dimension, thus make the layer of lengthening the life in pipeline be tightly bonded and
It is stuck in pipeline, is not in the constructional deficiency of the liner integral slipping often occurred in CIPP technique in the prior art, drops significantly
A possibility that low technique failure, expands being applicable in for the type technique to reduce the construction cost of the technique indirectly
Range.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of pipe of concrete structure before pipeline life-extension treatment of lengthening the life of the invention；
Fig. 2 is the schematic cross-sectional view of the concrete duct after the completion of pipeline life-extension treatment of lengthening the life of the invention；
Fig. 3 is a layer schematic structural cross-sectional view of lengthening the life of the invention；
Fig. 4 is layer of lengthening the life of the invention in ultraviolet light external structure schematic diagram before curing.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
BONNA pipe life-extension treatment technique in embodiment nuclear power station essential raw cooling water system gallery
BONNA to be repaired pipe is typical concrete pressure pipeline in the present embodiment, and steel flanges are arranged in pipe end
Continuous pipeline is formed for connecting single tube.In pipeline piping lane located underground, piping lane sectional dimension 2.8m × 2.6m, only two
1.5m × 3m hole for hoist, installing expansion joint space between pipeline and pipeline for 300mm can be used as the entrance that material enters pipeline,
Internal diameter of the pipeline 695mm, operating pressure 0.3MPa.
During military service, due to the pipeline Service Environment be briny environment, by seawater and marine organisms corrosion compared with
To be serious, anti-corrosion is carried out to it using many different restorative procedures during overhaul and is lengthened the life.In actual use situation,
Mortar repairing effect difference is not paid attention to completely, and insertion lining method is since live place is limited, BONNA pipe volume to be repaired is big
And the space being not carried out at all, therefore CIPP method can only be used, and if directly using existing CIPP method, the existing liner of one side
Protective layer is easy integral slipping loosening, fold occurs in surface, and the success rate of construction is extremely low, once ging wrong to come again, causes
Great cost waste, on the other hand, the liner protective layer after solidification connects with steel flanges, extra large in the pipeline course of work
Water water flow can along the gap between flange and liner invade pipeline inside, to pipeline generate corrosion, it is this corrosion it is more concealed,
Potential menace is bigger, and especially even more serious corrosion condition occur in flange connections on tube wall, can only remove liner
Protective layer re-starts protection, not only causes technique waste, but also potentially danger is huge.
The present inventor looks for another way in view of the above problems, is changed on the basis of original in-situ solidifying method
Into construction technology is as follows:
Step 1, ultraviolet light are lengthened the life the preparation of layer before solidifying
Layer of lengthening the life used in the present embodiment is tubular, is the layer of lengthening the life of ultraviolet curing type, i.e., before ultraviolet light solidification
For flexible layer, it is easy to transport, pulls, ultraviolet light then forms the structure sheaf of sizing after solidifying.Layer of lengthening the life in embodiment is ultraviolet
The 0.5-3% that entire outer diameter is less than internal diameter of the pipeline to be repaired before photocuring is advisable, leave and take it is certain solidify the space swollen, simultaneously
Excessive situation will not be caused stress to original pipeline to be repaired again.
In principle, the thickness degree of lengthening the life after ultraviolet light solidifies can be on active service according to pipeline during fluid flux and setting
Transfer efficiency is calculated, and in actual use, the layer of lengthening the life after ultraviolet light is solidified is advisable with a thickness of 3-15mm, for most
Good range of choice.Length is greater than duct length to be repaired before layer ultraviolet light of lengthening the life solidifies, and to guarantee to lengthen the life, layer can cover completely
It is placed in inner wall of the pipe.
As shown in Fig. 3, layer of lengthening the life successively includes inner membrance 6011, fiber and resin mixed layer 6012, outer membrane from the inside to the outside
6013, (due to being difficult to find out line of demarcation closely to coat, the two is separated to clad 6014 for outer membrane and clad in attached drawing 3
Structure, should not have any query herein).It is best, coating thickness 0.1- that inner membrance and outer film thickness, which are selected as 0.1-1mm,
0.5mm is best.Inner membrance, outer membrane and coating thickness need to be controlled, in order to avoid influence the function of final layer of lengthening the life.Above-mentioned thickness
Setting is so that the structure sheaf footprint for not playing main anti-corrosion life-prolonging function is small, but can satisfy use demand again.This
In embodiment, fiber selection selects high density polyethylene (HDPE) without the corrosion resistant ECR glass fibre of boron modification, inner membrance, outer membrane, wherein in
Hair side is kept on the outside of film, is bonded as one after hardening with fiber and resin mixed layer, resin contains light using commercially available
Thixotroping M-phthalic acid pentyl ester class unsaturated polymer, the clad of outer barrier ultraviolet light is the polyethylene of black.
In addition to preparation early period for layer of lengthening the life, pipeline to be repaired is before adding and lengthening the life layer, by the sand on its both ends inner wall
Pulp layer carries out equably machinery along caliber and cuts and polish smooth.As shown in Fig. 1,101 is mixed for the external reinforcing bar of pipe of concrete
Solidifying soil, 201 be sheet metal inside pipe of concrete, and 202 be the end-thickened steel plate of pipe of concrete, and 301 be pipe of concrete inner wall mortar
Layer, 401 connect steel flanges for end.Pipeline to be repaired is in preliminary preparation, by the screed 301 on its inner wall of end
Equably machinery being carried out along caliber to cut and polish smooth, the part cut forms the screed 501 to connect with layer of lengthening the life later,
The thickness (as shown in Fig. 1, should subtract thickness B with a thickness of the thickness of screed 301) that screed is cut is the 0.5- of caliber
1.5% is advisable, and the length (as shown in Fig. 1, which is A) cut is from the inside 50-500mm of pipe end.Such as
Shown in attached drawing 1, screed 501 is further preferably polished into arcuation contact surface far from end side, can make to lengthen the life layer more
Smooth is adjacent to tube wall.
Concrete operations technique in this step are as follows:
According to size compatible with internal diameter of the pipeline to be repaired and length by fibrage at tubular structure fabric, will modeling
Material diaphragm is bonded into compatible tubular inner membrance, and then fabric is arranged and is coated on the outside of inner membrance, fabric is impregnated UV light
Change type resin, roller roll removal additional air and adjust to the thickness of setting, and plastic cement diaphragm shape is then coated on the outside of fabric
At outer membrane, the clad of one layer of isolation ultraviolet light is covered in outer membrane face, forms complete structure (according to field pipes internal diameter
695mm, the 7mm that is prefabricated in the factory be thick, outer diameter 685mm layer of lengthening the life), as shown in Fig. 4, forms tubular and lengthen the life the main body of layer
6015, layer both ends of lengthening the life of above structure are closed using sealing end lid 6016 and 6017, the sealing end, which covers, to be equipped with and can open
The venthole with intercommunication inside inner membrance closed.
Step 2, the solidification for layer of lengthening the life
The layer of lengthening the life being prepared in above-mentioned steps is placed in pipeline to be repaired, the venthole that sealing end covers is opened,
To a layer inner inflatable of lengthening the life, the blowing pressure 40-50kPa, in general, the blowing pressure are inversely proportional with pipe diameter to be repaired,
Namely Large Diameter Pipeline uses relatively low the blowing pressure, and small diameter tube uses relatively high the blowing pressure, and the layer that makes to lengthen the life is closely attached on pipe
On road inner wall, it can also cooperate and inflate, deflate repeatedly, pulling the fitting tightness for adjusting layer of lengthening the life and position, utilize ultraviolet lamp
Solidification is irradiated inside layer inner membrance of lengthening the life, and (ultraviolet lamp can be put into before curing lengthens the life in layer, while what is be put into goes back
Have the camera of internal observation, be bonded primitive pipeline when lengthening the life layer using camera observation, if having fold trace), it fills
Gas carries out finishing up to layer solidification of lengthening the life with solidification simultaneously, as shown in Fig. 2, forms the layer 601 of lengthening the life after solidifying.
Carry out step 1 in the processing of primitive pipeline after, as shown in Fig. 2, it can be seen that layer both ends of lengthening the life after solidification
Radial dimension be greater than the radial dimensions of other positions, so that the layer of lengthening the life in pipeline be made tightly to be bonded and be stuck in pipeline,
Be not in the constructional deficiency of the liner integral slipping often occurred in CIPP technique in the prior art, greatly reduce technique mistake
A possibility that losing.
Step 3, pipe end post-processing
Lengthen the life after the solidification of layer ultraviolet light, an extra layer both ends of lengthening the life cut off, excision to lengthen the life layer end from
Pipe end distance is that 5-50cm can (as shown in Fig. 2, distance be labeled as C herein, which can carry out according to the actual situation
Adjustment), and be no more than caliber and increase region, layer end that will lengthen the life, which is polished into from pipe end to pipeline inner thickness, to be gradually increased
Hill-like structure, then layer end of lengthening the life is closed using epoxy resin mortar.This step will effectively lengthen the life layer and steel
Preparation method orchid keeps apart, and thoroughly avoids steel flanges and generates any gap between layer of lengthening the life, to effectively avoid stealthy corrosion, shuts out
Corrosion failure potential absolutely threatens.
In embodiment lengthen the life layer solidification before radially extend rate be 2.4-3.2%, axially extending rate≤2%, after solidification most
Big operating pressure 1MPa, compared with liner in the prior art, it is bigger that the layer of lengthening the life in the embodiment of the present invention radially extends rate, makes
Layer lengthen the life in inflation, can bear bigger pressure in solidification process, thus being bonded more closely with pipeline to be repaired, while axis
It is lower than 2% to elongation control, making to lengthen the life, deformation is unlikely to excessive to layer in the axial direction, and influence is lengthened the life thickness degree.
In addition, the material bending modulus for layer of lengthening the life is 5200MPa, thermal expansion coefficient is 39 × 10-6/ DEG C, and concrete
Thermal expansion coefficient be 10 × 10-6/ DEG C, and it is 92-95 DEG C that ultraviolet light, which solidifies the solidification processing temperature for layer of lengthening the life, is much higher than pipeline
Service temperature (5-50 DEG C).In this way, the radial dimension at layer both ends of lengthening the life is still greater than the radial direction of other positions after curing molding
Size, then after reducing temperature, a layer both ends of lengthening the life are remained unchanged, and layer of lengthening the life can integrally be shunk, and form tensile stress, size is not
It can change, end will not be subjected to displacement.
Finally, it should be noted that above embodiments be only to illustrate the technical solution of the embodiment of the present invention rather than to its into
Row limitation, although the embodiment of the present invention is described in detail referring to preferred embodiment, those skilled in the art
It should be understood that the technical solution of the embodiment of the present invention can be still modified or replaced equivalently, and these are modified or wait
The range of modified technical solution disengaging technical solution of the embodiment of the present invention cannot also be made with replacement.
Claims (10)
- The layer 1. a kind of pipeline is lengthened the life is set to inner wall of the pipe, it is characterised in that:The layer of lengthening the life is the erosion resistant coating after ultraviolet light solidifies, and it is 2.4-3.2%, axially extending rate that it, which radially extends rate, before solidification ≤ 2%, maximum working pressure (MWP) 1MPa after solidification.
- The layer 2. pipeline as described in claim 1 is lengthened the life, it is characterised in that: the radial dimension at layer both ends of lengthening the life is greater than other positions The radial dimension set.
- The layer 3. pipeline as described in claim 1-2 is any is lengthened the life, it is characterised in that:The layer of lengthening the life is tubular, and entire outer diameter is less than the 0.5-3% of internal diameter of the pipeline to be repaired, UV light before ultraviolet light solidifies Layer of lengthening the life after change is with a thickness of 3-15mm；Length is greater than duct length to be repaired before layer ultraviolet light of lengthening the life solidifies；The layer of lengthening the life successively includes inner membrance, fiber and resin mixed layer, outer membrane, clad from the inside to the outside；The inner membrance and outer Film thickness is 0.1-1mm, and the coating thickness is 0.1-0.5mm；The inner membrance, outer membrane, clad are high molecular material, and the clad has the function of obstructing ultraviolet light；It is described Fiber and resin mixed layer be fibrage at pattern bonded fabrics impregnate the mixed layer that UV-cured resin formed.
- The pipeline 4. one kind is lengthened the life, it is characterised in that: the pipeline body is concrete pressure pipeline, and steel method is arranged in pipe end Orchid, the inner wall of the pipe use layer a method according to any one of claims 1-3 of lengthening the life.
- The technique 5. a kind of pipeline is lengthened the life, it is characterised in that: using lengthening the life layer as inner wall of the pipe anti-corrosion as claimed in claim 3 Layer.
- The technique 6. pipeline as claimed in claim 5 is lengthened the life, which comprises the steps of:Step 1, ultraviolet light are lengthened the life the preparation of layer before solidifying: will according to size compatible with internal diameter of the pipeline to be repaired and length Fibrage is bonded into compatible tubular inner membrance at the fabric of tubular structure, by plastic film, and fabric is then arranged cladding On the outside of inner membrance, fabric is impregnated into ultraviolet curing type resin, roller rolls removal additional air and adjusts to the thickness of setting, Then plastic cement diaphragm is coated on the outside of fabric and form outer membrane, cover the clad of one layer of isolation ultraviolet light in outer membrane face；It will be upper Layer both ends of lengthening the life for stating structure are closed using sealing end lid, and the sealing end is covered equipped with intercommunication inside to be opened/closed and inner membrance Venthole；Step 2, the solidification for layer of lengthening the life: the layer of lengthening the life being prepared in step 1 is placed in pipeline to be repaired, opens sealing end The venthole covered, to a layer inner inflatable of lengthening the life, the layer that makes to lengthen the life is closely attached in inner wall of the pipe, using ultraviolet lamp in a layer inner membrance of lengthening the life Inside is irradiated solidification, and inflation carries out simultaneously with solidification until layer solidification of lengthening the life finishes；Pipe end post-processing: step 3 by the extra layer cutting of lengthening the life in pipe ends portion, polishes smooth, then using containing The packing material of resin carries out end-enclosed.
- The technique 7. pipeline as claimed in claim 6 is lengthened the life, it is characterised in that:The pipeline to be repaired carries out equably machine along caliber before adding and lengthening the life layer, by the screed on its both ends inner wall Tool cuts and polishes smooth；The 0.5-1.5% with a thickness of caliber that the screed is cut, the length cut are from pipe end Inside 50-500mm.
- The technique 8. pipeline as claimed in claim 6 is lengthened the life, it is characterised in that: in step 3, after layer ultraviolet light solidification of lengthening the life, An extra layer both ends of lengthening the life are cut off, excision is 5-50cm to layer end is lengthened the life with a distance from pipe end, and is no more than pipe Diameter increases region, and layer end that will lengthen the life is polished into the hill-like structure gradually increased from pipe end to pipeline inner thickness, so Layer end of lengthening the life is closed using the packing material containing resin afterwards.
- The technique 9. pipeline as claimed in claim 6 is lengthened the life, it is characterised in that: in step 2, the blowing pressure 10-100kPa, institute The blowing pressure is stated to be inversely proportional with pipe diameter to be repaired.
- The technique 10. pipeline as claimed in claim 6 is lengthened the life, it is characterised in that: in step 2, by inflating, deflating repeatedly, pull Adjust fitting tightness and the position of layer of lengthening the life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221975.1A CN109237196A (en) | 2018-10-19 | 2018-10-19 | Pipeline lengthen the life layer, lengthen the life pipeline and pipeline is lengthened the life technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221975.1A CN109237196A (en) | 2018-10-19 | 2018-10-19 | Pipeline lengthen the life layer, lengthen the life pipeline and pipeline is lengthened the life technique |
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| Publication Number | Publication Date |
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| CN109237196A true CN109237196A (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811221975.1A Pending CN109237196A (en) | 2018-10-19 | 2018-10-19 | Pipeline lengthen the life layer, lengthen the life pipeline and pipeline is lengthened the life technique |
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| CN (1) | CN109237196A (en) |
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| CN110039797A (en) * | 2019-05-20 | 2019-07-23 | 南通纽佩普管道合伙企业(有限合伙) | A kind of ultraviolet light solidification pipeline material manufacturing process |
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Application publication date: 20190118 |