CN115199856A - CIPP ultraviolet curing repair construction method - Google Patents
CIPP ultraviolet curing repair construction method Download PDFInfo
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- CN115199856A CN115199856A CN202210877313.XA CN202210877313A CN115199856A CN 115199856 A CN115199856 A CN 115199856A CN 202210877313 A CN202210877313 A CN 202210877313A CN 115199856 A CN115199856 A CN 115199856A
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- Prior art keywords
- hose
- pipeline
- construction method
- light
- curing
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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
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
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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
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
Abstract
The invention provides a CIPP ultraviolet curing repair construction method, which comprises the following steps: s1: selecting resin slurry to be placed into a stirrer, adding a light curing agent, stirring for the first time, adding a heat curing agent, stirring for the second time to obtain prefabricated slurry, and preparing a hose by taking the prefabricated slurry as a base body according to a repaired pipeline: s2: after the pipeline is cleaned, the hose is pulled into the pipeline and blown, then the hose is placed into a curing lamp holder, and ultraviolet light or combined light formed by combining the ultraviolet light and infrared light is selected according to the thickness of the pipeline. According to the invention, the light curing agent and the heat curing agent are added before the hose is prefabricated, so that the hose can be cured under the photo-thermal condition, the repairing effect is good, and the hose can be cured only by ultraviolet irradiation when the thickness of the hose is thin, so that the comprehensiveness of CIPP ultraviolet curing repair is improved.
Description
Technical Field
The invention relates to the technical field of pipelines, in particular to a CIPP ultraviolet curing repair construction method.
Background
With the acceleration of the urban modernization process, a drainage pipe network is taken as an important municipal facility and plays an important role in urban blood vessels, but at the beginning of urban construction, the pipe network is not subjected to system planning, the problems of end breakage, rain and sewage mixed connection and the like exist, and structural defects of pipeline aging, breakage, leakage, deformation and the like and functional defects of tree roots, siltation and the like begin to appear in some pipelines along with the lapse of time, so that the problems of urban waterlogging, river channel pollution and the like are caused, and the problems of influence on the life of people and the environment are solved. Therefore, the work of repairing and reconstructing municipal drainage networks is urgent.
The prior art has the following defects: the existing CIPP ultraviolet curing repair mainly depends on the original pipeline shape to repair the lining, and because the pipeline condition is complex and the structural defects of deformation and collapse are more, aiming at the pipeline which completely loses the original pipeline shape, the CIPP ultraviolet curing repair is directly adopted to be impractical, so that the CIPP ultraviolet curing repair has great limitation.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a CIPP ultraviolet curing repair construction method.
The invention solves the technical problems through the following technical means: the CIPP ultraviolet curing repair construction method comprises the following steps:
s1: selecting resin slurry to be placed into a stirrer, adding a light curing agent for primary stirring, adding a heat curing agent for secondary stirring to obtain prefabricated slurry, and preparing a hose by taking the prefabricated slurry as a matrix according to a repaired pipeline:
s2: after the pipeline is cleaned, the hose is pulled into the pipeline and blown, then the hose is placed into a curing lamp holder, and ultraviolet light or combined light formed by combining the ultraviolet light and infrared light is selected according to the thickness of the pipeline.
Preferably, in step S1, the primary stirring time is 20min, the secondary stirring time is 30min, and the internal temperature of the stirrer is room temperature.
Preferably, the light curing agent comprises a photoinitiator, an oligomer and a diluent, and the resin is any one of unsaturated polyester, epoxy acrylate or urethane acrylate.
Preferably, the hose is: and (3) uniformly dip-dyeing the prefabricated slurry on the woven fabric to form a matrix, then respectively covering an inner membrane and an outer membrane on the inner layer and the outer layer of the matrix, and finally covering a protective membrane on the outer side of the outer membrane to obtain the hose.
Preferably, the hose drawing-in includes drawing the base film, pulley mounting, and hose drawing-in step S2.
Preferably, hose curing includes curing lamp holder placement, inflation dwell and pull back curing.
Preferably, the construction method further includes S3: the installation binding heads are prepared for inflation, at least three binding belts are bound on each binding head, and the binding heads are installed between the inner films of the hoses.
Preferably, the method further comprises the step of S4: and port treatment, including port cutting and middle inspection well cutting, cutting the diameter-reducing part of the port of the lining pipe to make the port of the lining pipe flush with the port of the original pipeline, repairing the lining pipe with a plurality of sections of pipelines together, and cutting the middle inspection well.
The invention has the beneficial effects that:
according to the invention, the light curing agent and the heat curing agent are added before the hose is prefabricated, so that the hose can be cured under the action of light and heat, the hose can be properly increased in thickness when facing a large-caliber pipeline and a pipeline with serious damage, the hose is irradiated with ultraviolet light and infrared light through the curing lamp bracket with the ultraviolet lamp and the infrared lamp, the hose with the increased thickness is completely cured, the repairing effect is good, and the hose can be cured only through the ultraviolet light irradiation when being thin, so that the comprehensiveness of CIPP ultraviolet curing repair is improved.
Drawings
FIG. 1 is a construction flow chart of the present invention;
fig. 2 is a schematic view of the structure of the hose of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, the repair technology of the in-situ curing method is mainly divided into two construction technologies of thermal curing and light (ultraviolet) curing from the curing process, wherein the thermal curing process mainly comprises hot water curing or steam curing, therefore, the repair technology of the ultraviolet curing lining is one of the repair technologies of the in-situ curing method, the repair technology of the ultraviolet curing lining refers to that a glass fiber cloth/felt hose which is soaked with light curing resin is pulled into a pipeline to be repaired and inflated to expand to be attached to the original pipeline, then the resin is cured through the irradiation of ultraviolet light to form a non-excavation repair technology with a lining pipe with higher strength, and the hose for repairing the ultraviolet curing lining is composed of an inner film, a fiber resin layer, an outer film and an ultraviolet light protection film from inside to outside, and the technology has the advantages that:
1) The lining and the pipeline are tightly attached, grouting is not needed, the loss of the overflowing area is small, and the overflowing flow of the pipeline can be increased after repair;
2) The construction speed is high, the construction period is short, and the method can be used for repairing the bent pipeline with a certain deformation part;
3) The inner surface of the formed lining pipe after repair is smooth and has no joint continuously, so that the integrity of the pipeline can be improved;
4) The curing speed is high, the construction time is short, the highest drawing speed of the lamp bracket can reach 1m/min, the lamp bracket can be immediately put into use after the pipeline is repaired, and the time for plugging and water transferring of the pipeline is greatly reduced;
5) The inner lining pipe formed by the ultraviolet curing inner lining repairing technology has high strength, and the elastic modulus of the inner lining pipe is 10 times of that of a common HDPE pipe, so that the inner lining pipe can meet the use requirement on the premise of smaller wall thickness;
however, the existing CIPP ultraviolet curing repair mainly depends on the original pipeline shape to repair the lining, and because the pipeline has complex conditions and more structural defects such as deformation and collapse, the direct adoption of CIPP ultraviolet curing repair is impractical for the pipelines which completely lose the original pipeline shape, so that the CIPP ultraviolet curing repair has great limitation;
therefore, we propose the following solution to solve the above problems:
example 1
Referring to fig. 1, the CIPP uv curing repair construction method of the present embodiment includes the following steps:
(1) Selecting resin slurry, placing the resin slurry into a stirrer, adding a light curing agent, stirring for 20min, adding a heat curing agent, stirring for 30min to obtain prefabricated slurry, wherein the internal temperature of the stirrer is room temperature:
the light curing agent comprises a photoinitiator, an oligomer, a diluent and other components, wherein the photoinitiator is subjected to chemical decomposition through transition from a ground state to an excited state when being irradiated by light to generate fragments (free radicals and ions), the photoinitiator comprises a free radical initiator, an ultraviolet light initiator, a cation initiator and a visible light initiator, the free radical initiator is divided into a homolytic type (acetophenone derivative) and a hydrogen-extracting type (benzophenone/tertiary amine) oligomer which are low molecular compounds containing carbon-carbon unsaturated double bonds and comprise epoxy acrylate, acrylic carbamate, polyester acrylate, polyether acrylate, unsaturated polyester, vinyl resin/acrylic resin and polyene/thiol systems;
diluents (monomers) are polymerizable monomers (acrylate monomers as the main) containing a carbon-carbon unsaturated double bond, which are classified into monofunctional monomers (f = 1) (e.g. butyl acrylate), difunctional monomers (f = 2) (e.g. hexanediol diacrylate) and self-polyfunctional monomers (f > 2) (e.g. trimethylolpropane triacrylate);
the resin comprises unsaturated polyester, epoxy acrylate, polyurethane acrylate and the like, in the embodiment, the epoxy acrylate is preferably used as the resin slurry, and the epoxy acrylate has excellent corrosion resistance and comprehensive performance;
(2) Firstly, a robot (a television camera device) of CCTV detection equipment enters a pipeline, the damage condition inside the pipeline is subjected to imaging processing, various damage problems generated by the pipeline are analyzed, and then the damage condition of the pipeline is known by combining images to prepare a hose matched with the pipeline;
ultraviolet curing inside lining repair technique makes the hose hug closely original pipeline through aerifing to the inner membrane the inside, make the hose solidification form the inside lining pipe of high strength when maintaining operating pressure, consequently the inner membrane should have airtight characteristics, additionally, in order to ensure the good solidification effect of hose, the inner membrane should have good light transmissivity, ensure that the ultraviolet ray can pierce through the resin solidification in the hose behind the inner membrane, in addition, exothermic reaction during the solidification reaction, the inner membrane should have higher temperature resistance in curing process, consequently, the photocuring inner membrane should have following requirement:
in order to ensure the stable pressure during inflation, the photocuring inner film is directly blown into a simple film without adopting sheet film welding to form the simple film;
the resin curing reaction is an exothermic reaction, and the temperature in the whole curing process is above 80 ℃, so the adopted inner film can bear the temperature without generating wrinkles caused by overhigh temperature;
in order to ensure the light transmittance of ultraviolet light, the inner film has better light transmittance;
the ultraviolet curing lining repair technology is characterized in that the curing process of the hose is carried out under the condition of maintaining the working pressure unchanged, in order to prevent the resin from flowing under the action of the pressure in the curing process of the hose, the adopted resin has certain viscosity so as to ensure good curing quality, the hose is pulled into an original pipeline through a drawing process, and the most protective film of the hose is an ultraviolet protective film, so that the ultraviolet protective film is required to have certain abrasion resistance and damage resistance.
Referring to fig. 2, the main control items of the hose are thickness and outer diameter, and the specific structure is as follows: the prefabricated sizing agent and the uniform dip-dyeing are uniformly dipped on the woven fabric to form a matrix, then a layer of inner membrane and a layer of outer membrane are respectively coated on the inner layer and the outer layer of the matrix, and finally a layer of protective membrane is coated on the outer side of the outer membrane to obtain the hose;
(3) The method is characterized in that the original pipeline needs to be pretreated before construction, the pipeline with functional defects needs to be dredged completely without silting and obstacles, the pipeline with structural defects needs to be pretreated before ultraviolet curing, and the conventional pipeline repairing field is divided into the following common pretreatment methods: a high-pressure water cleaning method, a winch cleaning method, a local repairing method, a grouting plugging method, a collapse treatment method and the like;
after the pretreatment is finished, the arrangement of field equipment and materials is reasonably arranged according to the field condition, and the ultraviolet curing lining repair technology has no clear regulation on the construction sequence of the pipeline, so that the construction can be started from an upstream pipeline or a downstream pipeline;
the light curing agent and the heat curing agent are added into the base body of the hose, so that a sunshade is required to be arranged on a road section where the hose is transferred from the transport vehicle to repair the pipeline, so that the phenomenon that the hose is partially cured during transfer is avoided, and the later construction of the hose is influenced;
(4) The hose drawing stage mainly comprises drawing a bottom film, installing pulleys, drawing a hose and the like, wherein the bottom film mainly has the functions of preventing the hose from being worn in the drawing process and reducing the friction force in the drawing process, and the bottom film is placed at the bottom of the pipeline;
the pulley installation mainly comprises shaft bottom pulley installation and shaft mouth pulley installation, the functions of the pulley installation are to facilitate the steering of a traction rope and reduce friction when the hose is pulled, because the diameter of a general inspection shaft mouth is 600-700mm, the hose is folded before being pulled, the hose is pulled and folded during the pulling process and is sent into an inspection shaft, the whole process ensures that the hose is stably, flatly and slowly pulled into an original pipeline along a bottom film, the pulling speed is not more than 5m/min, the longitudinal crowding phenomenon of the hose cannot occur, and a folding blanking frame can be formulated to assist construction if necessary;
(5) The purpose of the head binding stage is to prepare for the later inflation, at least three binding belts are bound on each binding head, and the binding heads are arranged between the inner films of the hoses;
(6) The hose curing stage mainly comprises placing a curing lamp holder, inflating, maintaining pressure and pulling back for curing, wherein the lamp holder is placed into the hose through a binding head, the lamp holder is gradually placed by adopting an air lock technology when placed, the inner membrane of the hose is prevented from being damaged in the placing process, the binding head is locked after the lamp holder is placed, the hose is fully expanded to be tightly attached to the inner wall of the original hose through compressed air, the pressure in the inflating process is slowly increased to working pressure and is maintained for a certain time, the working pressures of the hoses with different specifications are different, the larger the general pipe diameter is, the lower the working pressure is, the lamp holder is pulled to the other end of the hose in the pressure maintaining process, the curing is started after the pressure is maintained for a certain time, the ultraviolet lamps on the lamp holder are sequentially opened according to the specification, then the lamp holder is pulled back at a certain speed, the pulling back speed is adjusted according to the temperature displayed by a temperature sensor in the whole curing process, the temperature in the general pipe is higher than 80 degrees, the curing condition is indicated, the lamp holder is pulled back to the mouth of the inspection well, the ultraviolet lamps are sequentially closed, the pressure in the inner lining pipe is kept in the curing process, the inner lining pipe is tightly contacted with the original hose, the pressure is slowly released after the pressure in the hose is reduced to the pressure in the hose, the hose is removed, and the inner membrane is taken out, the hose, the inner membrane is pulled out, and the hose is pulled out, and the inner membrane is pulled out;
(7) The port processing stage mainly comprises port cutting and middle inspection well cutting, and a reducing part of the port of the lining pipe is cut off by a special tool, so that the port of the lining pipe is flush with the port of the original pipeline, and the middle inspection well outlet of the lining pipe repaired together with multiple sections of pipelines is cut open.
Through the construction method, the light curing agent and the heat curing agent are added before the hose is prefabricated, so that the hose can be cured under the action of light and heat, the hose can be properly increased in thickness when facing a large-caliber pipeline and a pipeline which is seriously damaged, and the hose is irradiated with ultraviolet light and infrared light through the curing lamp bracket with the ultraviolet light and the infrared light at the same time, so that the hose with the increased thickness is cured completely, the repairing effect is good, and when the thickness of the hose is thin, the hose can be cured only through the ultraviolet light irradiation, so that the completeness of CIPP ultraviolet curing repair is improved.
Example 2
In the step (6), the curing lamp holder mainly comprises components such as an ultraviolet lamp, an infrared lamp, a lamp holder, a binding head, an air compressor, a cable winch and a control integrated system.
The number of the ultraviolet lamps and the number of the infrared lamps are equal, the ultraviolet lamps and the infrared lamps are uniformly arranged on the lamp holder, when the wall thickness of the hose is small, the hose can be cured only by ultraviolet irradiation through the ultraviolet lamps, and when the wall thickness of the hose is large, the hose needs to be irradiated and cured through the matching of the ultraviolet lamps and the infrared lamps;
the power of the ultraviolet lamp generally comprises 400W, 800W, 1000W and the like, the lamp holders generally comprise a large lamp holder and a small lamp holder, the large lamp holder comprises two lamp holder chains, each lamp holder chain can be provided with four ultraviolet lamps and four infrared lamps, the bulb power generally comprises 1000W, generally DN600 and more pipelines adopt the lamp holders, the small lamp holder comprises at least eight lamp holder chains, each lamp holder chain can be provided with an ultraviolet curing lamp and an infrared lamp, the bulb power generally comprises 400W, generally, pipelines below DN600 adopt the lamp holders, the front ends of the lamp holders generally are provided with cameras to observe the internal conditions of the pipelines at any time in the curing process, and the two ends and the middle of the lamp holders are provided with temperature sensors which can detect the internal temperature in the curing process;
the cable is mainly used for signal transmission and lamp holder pullback, and the winch mainly controls the pulling speed.
The main function of the binding head is to form sealing at two ends, meanwhile, the lamp bracket is convenient to be placed into a pipeline, the binding heads corresponding to different pipe diameters are adopted, and the control integration system is used for integrating the switch of the ultraviolet lamp, the winding pull-back speed feedback signal, the temperature feedback signal, the pressure feedback signal and the video feedback signal and then performing visualization so that an operator can control the control.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
- The CIPP ultraviolet curing repair construction method is characterized by comprising the following steps: the method comprises the following steps:s1: selecting resin slurry to be placed into a stirrer, adding a light curing agent for primary stirring, adding a heat curing agent for secondary stirring to obtain prefabricated slurry, and preparing a hose by taking the prefabricated slurry as a matrix according to a repaired pipeline:s2: after the pipeline is cleaned, the hose is pulled into the pipeline and blown to be expanded, then the hose is placed into a curing lamp holder, and ultraviolet light or combined light formed by combining the ultraviolet light and infrared light is selected and started according to the thickness of the pipe wall.
- 2. The CIPP ultraviolet curing repair construction method according to claim 1, characterized in that: in the step S1, the primary stirring time is 20min, the secondary stirring time is 30min, and the internal temperature of the stirrer is room temperature.
- 3. The CIPP ultraviolet curing repair construction method according to claim 2, characterized in that: the light curing agent comprises a photoinitiator, an oligomer and a diluent, and the resin is any one of unsaturated polyester, epoxy acrylate or polyurethane acrylate.
- 4. The CIPP ultraviolet curing repair construction method according to claim 3, characterized in that: the hose is as follows: and (3) uniformly dip-dyeing the prefabricated slurry on the woven fabric to form a matrix, then respectively covering an inner membrane and an outer membrane on the inner layer and the outer layer of the matrix, and finally covering a protective membrane on the outer side of the outer membrane to obtain the hose.
- 5. The CIPP ultraviolet curing repair construction method according to claim 1, characterized in that: in step S2, the hose drawing includes drawing the base film, pulley attachment, and hose drawing.
- 6. The CIPP ultraviolet curing repair construction method according to claim 5, characterized in that: the hose solidification comprises the steps of placing a solidification lamp holder, inflating and maintaining pressure and pulling back for solidification.
- 7. The CIPP ultraviolet curing restoration construction method according to claim 1, characterized in that: the construction method further comprises S3: the binding heads are arranged to be inflated, each binding head is bound with at least three binding belts, and the binding heads are arranged between the inner films of the hoses.
- 8. The CIPP ultraviolet curing repair construction method according to claim 7, characterized in that: further comprising S4: and port treatment, including port cutting and middle inspection well cutting, cutting the diameter-reducing part of the port of the lining pipe to make the port of the lining pipe flush with the port of the original pipeline, repairing the lining pipe with a plurality of sections of pipelines together, and cutting the middle inspection well.
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| CN202210877313.XA CN115199856A (en) | 2022-07-22 | 2022-07-22 | CIPP ultraviolet curing repair construction method |
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2022
- 2022-07-22 CN CN202210877313.XA patent/CN115199856A/en active Pending
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