CN102649317A - Thermocuring process for CIPP (Cured In Place Pipe) pull-in method lining repair - Google Patents
Thermocuring process for CIPP (Cured In Place Pipe) pull-in method lining repair Download PDFInfo
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- CN102649317A CN102649317A CN 201110321854 CN201110321854A CN102649317A CN 102649317 A CN102649317 A CN 102649317A CN 201110321854 CN201110321854 CN 201110321854 CN 201110321854 A CN201110321854 A CN 201110321854A CN 102649317 A CN102649317 A CN 102649317A
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- heating
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- flexible pipe
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
- B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
Abstract
The invention relates to a heating method for curing resin in a drainage pipe trenchless in-place lining repair-CIPP pull-in method lining repair technology, in particular to a method in which a heat source generating device is arranged in a hose to directly or indirectly heat the resin so as to cure the resin. The common characteristic of thermocuring processes in CIPP repair construction at home and abroad is that heat sources are both arranged outside hoses, the processes belong to circular heating processes, the largest weakness is that a boiler belongs to a pressure container and needs to be moved casually in construction, which brings great hidden dangers to construction safety, and the other weakness is that the heat efficiency is low. The invention aims to provide a method in which the heat source generating device is arranged in the hose to directly or indirectly warm the resin and guarantee the curing of the resin, and no other energy loss exists except a small amount of heat absorbed by the stratum, so that the curing efficiency can be improved, a pressurized steam boiler is no longer used in the construction, and the safety can be further guaranteed.
Description
The thermal curing methods that technical field: the present invention relates to the reparation of the non-excavation original position of a kind of drainage pipeline liner---CIPP board pulling method liner is repaired; Be specially a thermal source generating means and be installed in flexible pipe inside, directly or indirectly heat class methods that make resin solidification to resin.
Background technology: the drainage pipeline of operation many decades very easily is corroded, produces the decline of pipe shaft intensity, fracture, dislocation and effluent seepage; Treat that the stratum is gradually by naughty empty; Us be will occur through the municipal accidents such as surface collapse that regular meeting runs into, huge life, property loss caused.Over nearly 40 years; Under the leading of the CIPP (Cured in place pipe) of Britain Eric wood engineer name technology; The all parts of the world is all adopting similar non-excavation lining technique that old pipeline is carried out purposeful reparation, in the Application and Development of China's this type recovery technique also in mushroom development.
On-the-spot in-situ solidifying formed C IPP technology mainly contains flexible pipe inversion method and two kinds of mounting process of flexible pipe board pulling method.Owing to the flexible pipe board pulling method recovery technique that with glass fiber impregnated resin is material of main part belongs to organic/inorganic composite material; Have high tension, bending strength and elastic modelling quantity; The flexible pipe inversion method compared with techniques of processing with synthetic fibers such as polyester fiber felts; It is high a lot of that the load that can bear is wanted; Elastic modelling quantity like regulation flexible pipe inversion method in the ASTMF1216 standard is 1725MPa, and the elastic modelling quantity of flexible pipe board pulling method can reach 12000MPa, and the inner liner design thickness of flexible pipe board pulling method was more much lower than flexible pipe inversion method when equal pipeline was repaired.So the flexible pipe board pulling method recovery technique of glass fiber impregnated resin has obtained the market well recognized in recent years.
Worker's method that resin solidification in the flexible pipe board pulling method repairing construction of glass fiber impregnated resin adopts has: two big types of ultraviolet ray (UV) curing process, the technologies that is heating and curing.The main distinction of its middle-ultraviolet lamp (UV) curing process and other heat curing process is on the material prescription; Guarantee resin solidification; To add uv initiator in the prescription, form active group behind its absorbed radiation energy, and then contain unsaturated double-bond generation chemical reaction (mainly being each type of polymerization) in the initiator system; Form the high molecular polymer of crosslinked cubic network structure; Its tool is short hardening time, and the advantage that traditional curing technology such as low-temperature curable is incomparable is called new generation of green technology.But it is that inner liner thickness is thinner that the application of photocuring technology is different from the place of heat cure technology; Generally about 5mm; Professors Huang Da of BJ University of Aeronautics & Astronautics etc. show through the microhardness analysis of measuring the photocuring sample, for thicker sample, surpass behind the 5mm because phenomenons such as ultraviolet ray can be reflected during through resin bed, absorption and scatterings; The limited light intensity of depths that causes of penetration power weakens greatly, makes thick product fully not solidify.And much will be above 5 millimeters according to the inner liner wall thickness of the glass fiber impregnated resin technology of ASTM F1216 designing and calculating employing board pulling method; Some will reach more than 15 millimeters; The inner liner wall thickness that UV-curing technology is used often can not satisfy the recovery technique requirement, so heat curing process is more suitable for all kinds of (comprising board pulling method and reversal process) CIPP board pulling method inner lining repairing technique.
At present, heat curing process mainly contains cycling hot steam cure technology, circulation mixed vapour curing process, recirculated hot air curing process etc. in the repairing construction both at home and abroad, and its common feature is that thermal source is all in the flexible pipe outside; All belong to the circulation heating process, all in the steam cure technology of the U.S. ASTM F2019-03 regulation of carrying out, what German Saertex company adopted is recirculated water steam cure technology like the whole world; What American I nliner company and Chinese Tianjin shook the employing of Tianjin engineering group company is the curing process of circulation " water vapour and air " gaseous mixture, the recirculated hot air curing process that Hua Sai Tube Technology PTY. Ltd. in Tianjin is newly developed etc., and heat generating device such as heating boiler etc. are all on the ground; Under constant pressure; Hot gas gets into flexible pipe from an end, discharges from the other end, and heating to flexible pipe by replacement finally makes resin solidification; Its maximum weakness is that boiler belongs to pressure vessel; Must move at any time in the construction, this causes very big hidden danger to construction safety, and some city not allows boiler to set out on a journey; Another weakness is energy or serious heat loss, and heat time heating time is long, and the thermal efficiency is low; For this reason; The present invention is devoted to the method that provides one type of heat power supply device to be installed in flexible pipe internal feed heat and guarantee resin solidification, except that the little heat of formation absorption, no longer includes other energy loss; Will inevitably improve curing efficiency, and not have steam boiler can be protected safely certainly.
Summary of the invention
At first, what we will describe is environment for use of the present invention: inner lining material can be the flexible pipe that contains glass fibre of all kinds of thermosetting resins of dipping, and impregnating resin adopts the heat cure prescription; Mounting process is a board pulling method, and flexible pipe expands, and what be attached to that old inside pipe wall uses is air, and in other words inverted liner method and hydraulic pressure expansion process be not in range of application of the present invention; It can be directly to heat to resin that heating makes the approach of resin solidification, also can be that heating heats up to resin indirectly to the air ambient in the flexible pipe.
Main processes includes following steps: on-site land survey; Pipeline cleaning; The pipeline endoscope detects; Local treatment in the drainpipe deferent; Complex fiber hose is made; Fiber hose impregnating resin mixture; The liner hose of impregnating resin is drawn in the location; Inflation is expanded flexible pipe and is attached to old inside pipe wall; Be heating and curing under the constant voltage, handle the liner termination; Examination water flowing operation.Fig. 1 is a schematic diagram of the present invention.
The technical problem that the present invention at first will solve is to find suitable thermal source generation equipment.We know that thermal source supplier commonly used has light heating, electric heating, chemical reaction heat etc.Because the restriction of environment for use; Effective electric heating is our main direction; As electric light heat, heating wire heat, hot-blast stove is heated, electric-heating belt is heated etc., electric light heat can comprise that infrared lamp, ultraviolet lamp, Halogen lamp LED etc. are penetrated by illumination can make the light absorbing energy of object, the temperature rising.
The volume of thermal source will have certain limitation, can not surpass the internal diameter of institute's pipe-repairing, moderate length; Wanting and can in pipeline, move, can be automatically, also can be artificial control; Heat release is even; Heat resource equipment is wanted to guarantee long-term work under heating-up temperature; Require the efficiency of heating surface of thermal source high, speed is fast, guarantees to reach service requirement at 2-10 hour with the interior resin solidification that makes.
Analysis-by-synthesis, the heat resource equipment that is suitable for mentioned above can be electric heating warm braw series.Like electric fan heater is a kind ofly to send the equipment of warm braw through consumed power, in flexible pipe, sucks Cryogenic air, along the inner specific heat exchange runner of electric-heating container, takes away the high temperature heat that heating produces, and the heated air temperature is raise gradually.For reaching the intensification needs, electric fan heater power is wanted to satisfy the temperature that in 3-5 hour, makes resin solidification.
The heat resource equipment that is suitable for mentioned above can be electric-heating belt, Electric radiant Heating Film type.This type heating material heater is Main Ingredients and Appearance with carbon; Not to be used to heat inner air tube, but, can increase certainly yet the inner air tube temperature attached to directly heating resin on the flexible pipe inner membrance; He is the electricity companion heating that is used for crude oil pipeline at first; Because it is thin sheet products (standard thickness is 1.5mm), has good flexibility, can closely contact fully with heating object.Press close to calandria more easily, and shape can like this, just can let heat be delivered to any required place with requiring to change the design heating.Can through calculating provide arranging density and electrical power when we can utilize it to heat to resin here.
The heat resource equipment that is suitable for mentioned above can be an electromagnetic induction heat class device, as being the radiant type electromagnetism heating plate that we are commonly called as.It utilizes electromagnetism heating magnetic induction and thermal-radiating principle, and the panel of electromagnetic heater is set to the panel of non-magnetic, through being arranged on magnetic core in the electromagnetic heater and magnetic induction coil under the panel; Form strong alternating magnetic field; The magnetic line of force in this magnetic field produces the loop through panel, and in panel, forms numerous vortex shape induced-current; The energy of this electric current directly changes into heat energy through the resistance of panel; The temperature of panel is raise rapidly, then, air dielectric is heated through heat radiation by panel again.And in order to improve the thermal efficiency, the magnetic core under the panel in the electromagnetic heater can adopt the magnetic core of " mountain " font structure, to improve the magnetic flux density of unit are.
The heat resource equipment that is suitable for mentioned above can be a heating using microwave class device, the micro-wave oven that is commonly called as like us, microwave curing machine etc.Microwave is meant that frequency is the electromagnetic wave of 0.3-300GHz.Material can produce to heat up under microwave action chemical reaction takes place.The microwave radiant energy make chemical reaction identical temperature rise in addition lower temperature under, produce efficient than high several times even tens times of conventional method.The microwave radiation can the materials used temperature raise, and therefore, intuitively, the principle of microwave radiation curing utilizes the microwave radiation to produce heat exactly, resin temperature is raise and the generation curing reaction, rather than the air in the heating hose.With respect to the mode of heating of routine, microwave is a kind of interior heating, has characteristics such as firing rate is fast, temperature even, no hysteresis effect, therefore can accelerate curing rate.Certainly, the mechanism that microwave is had an effect to chemical reaction is very complicated, and making on the one hand is that reactant molecule has absorbed microwave energy, has improved molecular motion speed, causes molecular motion disorderly and unsystematic, causes the increase of entropy; Microwave forces it to move according to the electromagnetic field effect mode to the effect of polar molecule on the other hand, has caused the minimizing of entropy.Therefore, microwave can not only be described with the microwave thermal effect the effect of chemical reaction.In a word, the organic reaction under the microwave action has changed kinetics, has lowered reaction activity.
The heat resource equipment that is suitable for mentioned above can be that luminous energy is given birth to hot type, like infrared lamp, ultraviolet lamp, far-infrared lamp etc.Ultrared wavelength is 0.75 μ m-1000 μ m, calls near infrared ray to the infrared ray of 0.75 μ m-1.5 mum wavelength, calls far infrared to the infrared ray of 1.5 μ m-1000 mum wavelengths.Ultrared important function is heat effect.The molecule of material also can make the rotational energy of molecule produce change after drawing infrared ability.And vibrational spectrum has a kind of effect of widening vibration, rotating, and can enlarge with the equilbrium position amplitude in the middle of being, aggravates its inner vibration.Because the vibration of the activity of electronics and molecule is to be in high speed, this activity ceaselessly makes the vibration of lattice, key group breed each other at it and produces collision.The change of this active state has been accelerated friction and heating up just as the object of two kinds of fast turn-arounds, and therefore, its programming rate is fast.Simultaneously, during the infrared radiation heating article, be the position that penetrates according to infrared energy, its temperature is often come highly than appearance.
The heat transfer form of infrared lamp is a radiant heat transfer, transmits energy by electromagnetic wave.When far-infrared radiation arrived heated object, a part of ray was reflected, and a part is penetrated over.When the absorbing wavelength of far infrared wavelength and the heating object of emission is consistent; Heated object absorbs far infrared, and at this moment, " resonance " takes place for interior of articles molecule and atom---produce strong vibration, rotation; And vibration and rotation raise object temperature, reach heating purposes.The infrared heater that we select for use can be a heater air flow pressure switch rod, is to be the axle center with the heating rod, and its radiation direction is 360 degree omnidirectional radiations.The used infrared lamp of the present invention, ultraviolet lamp, far-infrared lamp etc. play air in the heating hose and directly heat the double action of resin.
The technical problem of its less important solution of the present invention is how thermal source generation equipment is installed in the flexible pipe in construction.In general; The thermal source equipment can be installed in the flexible pipe any time front and back in place in flexible pipe is pulled into old pipe, it should be noted that damage equipment and control connection part are not wanted in place will the guaranteeing of preceding thermal source equipment in place when flexible pipe is drawn in operation in flexible pipe is pulled into old pipe; And flexible pipe is pulled into that in the old pipe thermal source equipment in back in place is in place again, need carry out fitting operation in the shaft bottom, and emphasis is in design of tying up blind plugging and processing so, to guarantee the Fast Installation of heat resource equipment.As shown in Figure 2 is the part that can satisfy the blind plugging panel designs of fast assembling-disassembling.
The key technical problem that the present invention will solve once more is how the thermal source equipment moves in flexible pipe so that evenly heating.At first, be installed in heat power supply device on the dolly of the band wheel (maybe can be various ways such as crawler belt transmission) that can move, guarantee that thermal source can move along pipeline; Give dynamical system of dolly then; Method can be flexible pipe when making in pipe pre-buried pull rope; One end of pull rope is connected with the dolly of heat power supply device; The other end passes tail blind plugging panel and is connected with the hoist engine of inspection shaft mouth, and this hoist engine can be hand, also can be electronic stepless time adjustment.Certainly, this dolly that heat power supply device has been installed also can be full automatic, on the ground can straighforward operation.Vehicle-mounted thermal source generating means sees that Fig. 3 illustrates.
The key technical problem that the present invention also will solve is how to guarantee the pressure substantially constant in the flexible pipe.Because heat power supply device must have control system and dynamical system; Necessarily need pass blind plugging is connected with extraneous; And because the heat power supply device dolly moves, the interface position is bound to leak gas, though we can be easy to guarantee the intraductal atmospheric pressure substantially constant; But a large amount of gas leakage still cannot unfavorable because this can produce temperature drop to solidifying.Our solution is to adopt movable sealing, both can allow moving of cable, can leak gas again and be reduced to minimum.
Effect of the present invention is through the use of thermal source in the inner class methods that directly or indirectly are heating and curing to resin of flexible pipe, has improved rate of energy, has reduced the loss of energy, can improve heating and curing rate certainly greatly; And not had this pressure vessel of boiler at the construction field (site), construction safety can further be ensured certainly; Field ground has not had boiler simultaneously, has just lacked fuel tank, water tank etc. yet, and nature also can further reduce the influence of municipal traffic.
The present invention just improves on curing worker method, has kept original glass fiber impregnated resin hose to draw in all technical advantages of technology, can accomplish that promptly 100% does not excavate ground; Utilize the characteristic of liner hose, can repair circle, arch, special-shaped pipeline such as square; Inner lining surface is smooth, does not influence flow; Solidify the crosslinked body of toughness that the back forms, as the compound product of organic-inorganic, the chemical bond quite stable can reach 50 years service life with first-class.
Description of drawings:
Fig. 1: be process principle figure of the present invention
Fig. 2: the blind plate floor map of fast demountable
Fig. 3: vehicle-mounted thermal source generating means sketch map
In Fig. 1～3:
The 1-vehicle control syetem; 2-control cable and power line;
Blind plugging before the 3-; The vehicle-mounted thermal source generating means of 4-;
The 5-liner hose; The blind plugging of 6-tail;
The electronic variable-speed winch of 7-; 8-water blockoff air bag;
The 9-pressure tap; The 10-thermometer boss;
The 11-gas source interface; 12-control line and electric source line interface;
13-controls cable; The 14-pull rope;
The 15-wheel.
The specific embodiment
Require to treat according to the liner renovation technique and repair pipeline and road environment carries out site inspection, need to understand pipeline place road traffic condition, in the little time period construction of magnitude of traffic flow every day, to reach minimum to the road traffic influence; Accurately measure each pipeline relevant parameter, guarantee the smooth implementation of construction technology; Change water blockoff and the water transfer scheme rationally formulated according to pipeline flow; Carry out peeping detection in the pipeline CCTV, grasp the in-situ data of pipe interior, for the liner reparation provides reference.
Advanced administration-management road cleans in the construction, and cleaning quality detects the operation of drawing in the glass fiber hose material after qualified, carry out then the present invention heating, the resin solidification step that will implement.This process is the solidification process of a large amount of resins; Guarantee that the glass fiber resin material can be adjacent to former pipeline closely; Also will guarantee not destroy former pipeline simultaneously, need strict controlled pressure in cure stage, the diameter of material, thickness, length, environment temperature etc. all directly influence the control of the temperature and time of material in solidification process; Formulate the control scheme of temperature and time, solidification process is accomplished smoothly.
Embodiment 1
Before flexible pipe is drawn in, before being installed in, in the blind plugging, when drawing in the glass fiber hose material, to operate meticulously by the heat power supply device dolly, do not destroy heat power supply device, after waiting to draw in operation and accomplishing, open air compressor machine and make the flexible pipe inflation, be attached to old inside pipe wall until expanding.Behind the constant pressure, the beginning operation control heats.Detection at any time pipe internal pressure and the indication of two ends temperature begin to solidify at heating the second half resin, can find a zooming interval of temperature; This is a resin in the process of concentrating exothermic heat of reaction, continues heating, cuts off the electricity supply later in one hour to stop heating; Feed cold air, open tail blocking air valve, make the speed cooling of inner air tube with per minute 1 degree; After temperature is reduced to below 38 degree in waiting to manage, carry out follow-up construction operations such as port excision.
Embodiment 2
After drawing in the operation completion of glass fiber hose material, open air compressor machine and make the flexible pipe inflation, be attached to old inside pipe wall until expanding.Behind the constant pressure, blind plugging panel before the unlatching pushes the heat power supply device dolly in the flexible pipe fast, connects cable and control cable rapidly, closed again preceding blind plugging, and after continuing to inflate constant voltage, the beginning operation control heats.Detection at any time pipe internal pressure and the indication of two ends temperature begin to solidify at heating the second half resin, can find a zooming interval of temperature; This is a resin in the process of concentrating exothermic heat of reaction, continues heating, cuts off the electricity supply later in one hour to stop heating; Feed cold air, open tail blocking air valve, make the speed cooling of inner air tube with per minute 1 degree; Wait to manage in temperature be reduced to 38 spend after, carry out follow-up construction operations such as port excision.
Claims (10)
1. the non-excavation original position of a drainage pipeline liner is repaired--the thermal curing methods that-CIPP board pulling method liner is repaired, it is characterized in that these class methods are installed in flexible pipe inside to thermal source generation generating means, and directly or indirectly heating makes resin solidification to resin.
2. the be heating and curing method according to claim 1 is characterized in that: the environment for use of thermal curing methods is that inner lining material can be the flexible pipe that contains glass fibre of all kinds of thermosetting resins of dipping, and impregnating resin adopts the heat cure prescription; Mounting process is a board pulling method; Flexible pipe expands, and what be attached to that old inside pipe wall uses is air.
3. the be heating and curing method according to claim 1, it is characterized in that: main processes includes on-site land survey; Pipeline cleaning; The pipeline endoscope detects; Local treatment in the drainpipe deferent; Complex fiber hose is made; Fiber hose impregnating resin mixture; The liner hose of impregnating resin is drawn in the location; Inflation is expanded flexible pipe and is attached to old inside pipe wall; Be heating and curing under the constant voltage, handle the liner termination; Examination water flowing operation.
4. the thermal source generating means according to claim 1 can be electric heating warm braw series.Like electric fan heater, electrothermal furnace, electric blanket etc.
5. the thermal source generating means according to claim 1 can be electric-heating belt, Electric radiant Heating Film type.
6. the thermal source generating means according to claim 1 can be electromagnetic induction heat class device, as being our radiant type electromagnetism heating plate of being commonly called as etc.
7. the thermal source generating means according to claim 1 can be heating using microwave class device, the micro-wave oven that is commonly called as like us, microwave curing machine etc.
8. the thermal source generating means according to claim 1 can be that luminous energy is given birth to hot type, like infrared lamp, ultraviolet lamp, far-infrared lamp etc.
9. the thermal source generating means according to claim 1 is characterized in that: equipment takes place and can in flexible pipe is pulled into old pipe, be installed in the flexible pipe any time front and back in place in thermal source.
10. the thermal source generating means according to claim 1, it is characterized in that: thermal source is equipped in the flexible pipe and can moves forward and backward, move mode can be manual also can be automatic.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110321854 CN102649317A (en) | 2011-10-21 | 2011-10-21 | Thermocuring process for CIPP (Cured In Place Pipe) pull-in method lining repair |
| PCT/CN2011/001891 WO2013056404A1 (en) | 2011-10-21 | 2011-11-11 | Thermocuring process in cipp pull-in method lining repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110321854 CN102649317A (en) | 2011-10-21 | 2011-10-21 | Thermocuring process for CIPP (Cured In Place Pipe) pull-in method lining repair |
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| CN102649317A true CN102649317A (en) | 2012-08-29 |
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| CN 201110321854 Pending CN102649317A (en) | 2011-10-21 | 2011-10-21 | Thermocuring process for CIPP (Cured In Place Pipe) pull-in method lining repair |
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| WO (1) | WO2013056404A1 (en) |
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| CN111906973A (en) * | 2019-05-10 | 2020-11-10 | 云南建投安装股份有限公司 | Integral vulcanization construction method for large-diameter rubber-lined pipeline |
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| DK0870152T3 (en) * | 1996-01-11 | 2003-03-03 | Uponor Innovation Ab | Method for lining underground pipelines |
| US7112254B1 (en) * | 2003-11-07 | 2006-09-26 | Insituform (Netherlands) B.V. | Installation of cured in place liner with inner impermeable layer and apparatus |
| CN101907213A (en) * | 2010-07-23 | 2010-12-08 | 管丽环境技术(上海)有限公司 | Trenchless repairing method of underground pipeline with drawing-type liner pipe |
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