CN111963814A - Pipeline non-excavation repairing method - Google Patents
Pipeline non-excavation repairing method Download PDFInfo
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- CN111963814A CN111963814A CN202010898895.0A CN202010898895A CN111963814A CN 111963814 A CN111963814 A CN 111963814A CN 202010898895 A CN202010898895 A CN 202010898895A CN 111963814 A CN111963814 A CN 111963814A
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- lining hose
- pressure
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- hose
- pipeline
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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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- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The disclosure provides a pipeline trenchless repairing method, and belongs to the technical field of pipeline repairing. The trenchless pipeline repairing method comprises the following steps: pulling a lining hose into a pipeline to be repaired, wherein the wall of the lining hose is provided with liquid thermosetting resin; plugging two ends of the lining hose; controlling the lining hose to be attached to the inner wall of the pipeline to be repaired; controlling the curing conditions of the lining hose in stages such that the thermosetting resin cures, at least one of the pressure within the lining hose and the temperature of the lining hose being different at different said stages; and opening two ends of the lining hose to obtain the repaired pipeline. The method can finish the solidification of the lining hose while passing through a fluid medium, simplify the construction process and improve the pipeline repairing efficiency.
Description
Technical Field
The disclosure relates to the technical field of pipeline repair, in particular to a pipeline trenchless repair method.
Background
The urban drainage pipe network is an important infrastructure for urban water pollution prevention and control, urban drainage and flood control. The service life of the drainage pipeline is usually 30 to 50 years, the drainage pipeline is usually required to be repaired or a new pipeline is required to be laid after the service life of the drainage pipeline is reached, and the construction period is long and the cost is high when the tunnel is dug again and a pipe network is laid. Trenchless rehabilitation techniques are therefore typically used to rehabilitate damaged pipelines.
The trenchless repairing technology of the pipeline is also called a hose lining method or a CIPP (Cured In Place Pipe) method, and the concrete repairing process is that a lining hose is lined on the inner wall of a damaged old pipeline, liquid resin is filled In the lining hose, then the resin is Cured through ultraviolet light, and a lining Pipe tightly attached to the inner wall of the pipeline is formed In the damaged pipeline, so that the pipeline can be put into use again.
However, the process of fixing the lining hose to the inner wall of the damaged pipe in the related art is generally: blowing air to the lining hose to support the lining hose by the air and contact the damaged inner wall of the pipeline; the ultraviolet lamp assembly was then placed in the lining hose, and the resin in the lining hose was cured by the ultraviolet lamp assembly to fix the lining hose to the damaged inner wall of the pipe. The curing mode comprises the steps of introducing a fluid medium to support the lining hose and placing an ultraviolet lamp component into the lining hose, so that the field construction operation is more complicated, and the pipeline repair is not convenient to complete quickly.
Disclosure of Invention
The embodiment of the disclosure provides a pipeline trenchless repairing method, which can finish curing of a lining hose while passing through a fluid medium, simplify the construction process and improve the pipeline repairing efficiency. The technical scheme is as follows:
the embodiment of the disclosure provides a pipeline trenchless repairing method, which comprises the following steps: pulling a lining hose into a pipeline to be repaired, wherein the wall of the lining hose is provided with liquid thermosetting resin; plugging two ends of the lining hose; controlling the lining hose to be attached to the inner wall of the pipeline to be repaired; controlling the curing conditions of the lining hose in stages such that the thermosetting resin cures, at least one of the pressure within the lining hose and the temperature of the lining hose being different at different said stages; and opening two ends of the lining hose to obtain the repaired pipeline.
In one implementation of the disclosed embodiment, the phased control of the curing conditions of the lining hose includes: in the first stage, the temperature of the lining hose is adjusted to a first temperature interval, and the pressure in the lining hose is controlled to be in a first pressure interval; in the second stage, the temperature of the lining hose is increased from the first temperature interval to a second temperature interval, and the pressure in the lining hose is controlled to be reduced from the first pressure interval to a second pressure interval; in the third stage, the lining hose is naturally cooled, and the pressure in the lining hose is controlled to be kept in the second pressure interval.
In another implementation of the disclosed embodiment, adjusting the temperature of the lining hose to a first temperature interval includes: introducing a fluid medium with the temperature within a first temperature interval into the lining hose; or electrifying the metal wires in the pipe wall of the lining hose until the temperature of the lining hose is increased to the first temperature interval.
In another implementation of the disclosed embodiment, the raising the temperature of the lining hose from the first temperature interval to a second temperature zone includes: discharging the fluid medium in the lining hose, and introducing the fluid medium with the temperature within a second temperature interval into the lining hose at the same time until the temperature of the lining hose is increased to the second temperature interval; alternatively, the current in the wire is increased until the temperature of the lining hose is increased to the second temperature interval.
In another implementation of the disclosed embodiment, the wire is arranged in an axial direction of the lining hose and/or wound in a circumferential direction of the lining hose.
In another implementation of the disclosed embodiment, the controlling the pressure in the liner hose in a first pressure interval includes: continuously introducing a fluid medium into the lining hose until the pressure of the lining hose reaches the first pressure interval; the controlling the pressure within the liner hose from the first pressure interval to a second pressure interval comprises: and discharging the fluid medium in the lining hose by using a pressure relief valve until the pressure in the lining hose is reduced from the first pressure interval to the second pressure interval.
In another implementation manner of the embodiment of the present disclosure, the first temperature range is 70 ℃ to 110 ℃, the second temperature range is 150 ℃ or more, the first pressure range is 50Kpa to 70Kpa, and the second pressure range is 20Kpa to 30 Kpa.
In another implementation manner of the embodiment of the present disclosure, after the pulling the lining hose into the pipe to be repaired, the method further includes: pulling the bladder to one end of the lining hose; control lining hose with treat the inner wall laminating of restoreing the pipeline, include: inflating the air bag to make the air bag open one end of the lining hose; and drawing the air bag from one end of the lining hose to the other end of the lining hose so that the lining hose is attached to the inner wall of the pipeline to be repaired.
In another implementation of the disclosed embodiment, the blocking the two ends of the lining hose includes: and plugs are inserted into two ends of the lining hose, and the plugs are fixedly connected with the lining hose by using hoops.
In another implementation of the disclosed embodiment, said opening both ends of said lining hose comprises: and cutting off the part of the two ends of the lining hose which axially exceeds the pipeline to be repaired so as to remove the plug.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
when the pipeline repairing method is used for repairing the pipeline, the lining hose is firstly pulled into the pipeline to be repaired, then two ends of the lining hose are plugged, and then the lining hose is controlled to be attached to the inner wall of the pipeline to be repaired. After the lining hose is tightly attached to the pipeline to be repaired, the curing condition of the lining hose is controlled in stages, wherein at least one of the pressure in the lining hose and the temperature of the lining hose is different in different stages, namely the pressure and the temperature of the lining hose can be adjusted when the lining hose is controlled in stages to be cured, and liquid thermosetting resin is carried in the lining hose, so that the thermosetting resin of the lining hose can be cured after the temperature in the lining hose is increased, the integral hardness of the lining hose is improved, and the lining hose can be fixed on the inner wall of the pipeline to be repaired. The modification method provided by the embodiment of the disclosure can avoid the step of placing the ultraviolet lamp assembly in the lining hose after the fluid medium is introduced. Not only saves the time of construction operation, but also simplifies the construction process and can greatly improve the efficiency of pipeline repair. After the lining hose is cured, the two ends of the plugged lining hose are opened, so that the lining hose is conducted, and the pipeline is repaired.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flow chart of a trenchless pipeline rehabilitation method according to an embodiment of the disclosure;
FIG. 2 is a flow chart of another trenchless pipeline rehabilitation method provided by the embodiment of the disclosure;
fig. 3 is a schematic diagram illustrating a first state of a method for repairing an outside pipe by excavation according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating a second state of the method for repairing the outer pipe by excavating according to the embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a second state of another method for repairing an outside cut of a pipeline according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating a third state of a trenchless pipeline rehabilitation method according to an embodiment of the disclosure;
fig. 7 is a schematic diagram of a fourth state of the method for repairing the pipe by excavating outside the pipeline according to the embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The embodiment of the disclosure provides a pipeline trenchless repairing method. Fig. 1 is a flowchart of a trenchless pipeline repairing method according to an embodiment of the disclosure. As shown in fig. 1, the trenchless pipeline repairing method includes:
step 101: the lining hose is pulled into the pipe to be repaired.
The lining hose is provided with liquid thermosetting resin which is easily cured by heating in a liquid state, and the hardness of the lining hose can be improved by heating after the resin is arranged in the lining hose.
Step 102: and (5) plugging two ends of the lining hose.
Step 103: and controlling the lining hose to be attached to the inner wall of the pipeline to be repaired.
Step 104: the curing conditions of the lining hose are controlled in stages so that the thermosetting resin is cured.
Wherein at least one of the pressure within the liner hose and the temperature of the liner hose are different at different stages.
Step 105: and (5) opening two ends of the lining hose to obtain the repaired pipeline.
When the pipeline repairing method is used for repairing the pipeline, the lining hose is firstly pulled into the pipeline to be repaired, then two ends of the lining hose are plugged, and then the outer wall surface of the lining hose is controlled to be tightly attached to the inner wall of the pipeline to be repaired. After the lining hose is tightly attached to the pipeline to be repaired, the curing condition of the lining hose is controlled in stages, wherein at least one of the pressure in the lining hose and the temperature of the lining hose is different in different stages, namely the pressure and the temperature of the lining hose can be adjusted when the lining hose is controlled in stages to be cured, and liquid thermosetting resin is carried in the lining hose, so that the thermosetting resin of the lining hose can be cured after the temperature in the lining hose is increased, the integral hardness of the lining hose is improved, and the lining hose can be fixed on the inner wall of the pipeline to be repaired. The modification method provided by the embodiment of the disclosure can avoid the step of placing the ultraviolet lamp assembly in the lining hose after the fluid medium is introduced. Not only saves the time of construction operation, but also simplifies the construction process and can greatly improve the efficiency of pipeline repair. After the lining hose is cured, the two ends of the plugged lining hose are opened, so that the lining hose is conducted, and the pipeline is repaired.
Fig. 2 is a flow chart of another trenchless pipeline rehabilitation method provided by the embodiment of the disclosure. As shown in fig. 2, the trenchless pipeline repairing method includes:
step 201: the lining hose C is pulled into the pipe J to be repaired.
The lining hose C contains a liquid thermosetting resin, which is a resin that is easily cured by heating in a liquid state, and the hardness of the lining hose C can be increased by heating after the resin is provided in the lining hose C.
In the process of executing step 201, the position of the pipeline J to be repaired may be determined, and the inspection well a adjacent to the pipeline J to be repaired is selected according to the position of the pipeline J to be repaired.
Fig. 3 is a schematic view of a first state of a method for repairing an outside pipe by excavation according to an embodiment of the present disclosure. As shown in fig. 3, after the inspection well a is determined, a tractor B is provided at one inspection well a, and a bracket D for accommodating a lining hose C is prevented at the other inspection well a.
The tractor B can be a motor for traction, and can be suitable for traction of various devices such as a railway main electric locomotive, an industrial and mining electric locomotive, an electric transmission diesel locomotive and the like. The traction machines B may include dc traction motors, ac asynchronous traction motors, and ac synchronous traction motors.
In the embodiment of the disclosure, a direct current traction motor is adopted, and the direct current traction motor has better speed regulation performance and working characteristics. The direct current traction motor comprises a built-in motor and a rotating shaft in transmission connection with the motor, and a steel wire is wound on the rotating shaft. In the process of the rotation of the motor, the steel wire can be dragged to contract so as to drive the component connected with the steel wire to move.
The working process of the traction lining hose C of the direct-current traction motor is as follows: lowering the steel wire on the rotating shaft from one inspection well A into a pipeline J to be repaired, and drawing the pipeline J to the other inspection well A; then, putting the lower part of the lining hose C into the inspection well A from the bracket D for containing the lining hose C, and connecting one end of the lining hose C with a steel wire; and then, starting the direct-current traction motor, and drawing the lining hose C to the inspection well A where the tractor B is located, so that the area where the lining hose C is located can completely cover the area of the pipeline J to be repaired, and the repairing effect of the pipeline J to be repaired is ensured.
Optionally, as shown in fig. 3, in the process of towing the lining hose C by the tractor B, a pulley or a roller may be disposed in the inspection well a to facilitate the lining hose C to be smoothly lowered into the pipe J to be repaired or the steel wire to be smoothly recovered from the pipe J to be repaired to the tractor B.
Step 202: and (4) plugging the two ends of the lining hose C.
Fig. 4 is a schematic diagram of a second state of the method for repairing the pipe by excavating outside the pipeline according to the embodiment of the present disclosure. As shown in fig. 4, step 202 may include: and plug heads E are inserted at two ends of the lining hose C, and the plug heads E are connected with the lining hose C by using the hoops.
In the above implementation, the plug E may be a pipe cap, a bulkhead, or a structural member welded to the pipe end or mounted on the pipe end to plug the pipe. Because the lining hose C in the embodiment of the present disclosure is a flexible hose, after the end of the lining hose C is provided with the plug E, the plug E and the lining hose C need to be fixedly connected by using the hoop, so as to improve the sealing property.
Step 203: and controlling the lining hose to be attached to the inner wall of the pipeline to be repaired.
Wherein, step 203 may comprise: and introducing a fluid medium into the lining hose to ensure that the lining hose is attached to the inner wall of the pipeline to be repaired.
In step 203, the fluid medium is introduced to support the lining hose, so that the lining hose is tightly attached to the inner wall of the pipeline to be repaired.
In the disclosed embodiment, the fluid medium may be air. That is, the fluid medium introduced into the lining hose C in step 203 is air.
As shown in fig. 4, an air compressor F may be disposed at the opening of the inspection well a in the embodiment of the present disclosure, wherein the air compressor F is a device for compressing gas. Air compressor F's air outlet can be through the one end cap E intercommunication of pipeline with the lining hose, and air compressor F can absorb the air in the external environment, exports air pressurization from the air outlet to make the air can be full of the lining hose rapidly, so that lining hose with wait to restore the laminating of pipeline J.
The pipe to be repaired may be bent after aged damage to assume an irregular state. For such a pipe to be repaired, impurities, such as accumulated water, etc., may be accumulated at the bent portion of the pipe. In this case, it is not easy to closely attach the lining hose to the pipe to be repaired by injecting a fluid medium into the lining hose.
Therefore, the lining hose can be attached to the inner wall of the pipeline to be repaired in another mode provided by the embodiment of the disclosure. This approach may include the following steps.
In a first step, after the lining hose is pulled to the pipe to be repaired in step 201, the balloon may be pulled to one end of the lining hose.
Fig. 5 is a schematic diagram of a second state of another pipeline outside excavation repair method provided by the embodiment of the disclosure. As shown in fig. 5, a tractor B is provided at one manhole a, and an airbag M is placed at one end of a lining hose C at the other manhole a, and the airbag M is connected to a wire of the tractor B, so that the tractor B can drag the airbag M to move within the lining hose C.
And secondly, after the two ends of the lining hose C are plugged, the air bag M can be inflated, so that the air bag M can prop open one end of the lining hose C.
As shown in fig. 5, in the embodiment of the present disclosure, an air compressor F, a heating tank G or an air heating pipe L may be disposed at another inspection well a, and an air outlet of the air compressor F may be communicated with the heating tank G or the air heating pipe L through a pipeline. Wherein, air compressor F can absorb the air in the external environment, exports heating jar G or air heating pipe L with air pressurization from the air outlet, heats the air through heating jar G or air heating pipe L. And heating tank G or air heating pipe L all can set up two exports, and one of them export communicates through pipeline and gasbag M, thereby can pour into high temperature air into gasbag M in, so that gasbag M can strut the one end of lined hose C, and another export then can communicate with lined hose C's one end cap E, so that the confined space that is formed by gasbag M and end cap in lined hose C can be filled with rapidly to the air of high temperature, so that lined hose C and waiting to restore the laminating of pipeline J.
Wherein, the export of being connected with the end cap of lined hose can set up the valve on heating jar G or the air heating pipe L, can control whether let in lined hose with the air through the valve to and let in when long time of air, in order to realize adjusting the purpose of lined hose C internal pressure.
The heating tank G can be internally provided with a heater, so that the fluid medium in the heating tank G is exchanged with the heat medium, and the temperature of the fluid medium is raised. For example, the heating tank G may be an electric heating tank. The air heating pipe L is an electric heating element which takes a metal pipe as a shell and is uniformly provided with spiral electric heating alloy wires along the axial direction of the center in the pipe, and the temperature of air can be raised through the air heating pipe L.
And thirdly, pulling the air bag M from one end of the lining hose C to the other end of the lining hose C to enable the lining hose C to be attached to the inner wall of the pipeline to be repaired.
As shown in fig. 5, the air bag M is dragged inside the lining hose C by a tractor B provided at one manhole a so that the air bag M can be pulled from one end of the lining hose C to the other end of the lining hose C. Because the air bag M supports the lining hose C, impurities accumulated in the pipeline can be pushed out of the pipeline to be repaired in an irregular shape, and therefore the lining hose C is always attached to the inner wall of the pipeline to be repaired. For the pipeline with the irregular shape, the lining hose C can be effectively well attached to the pipeline to be repaired in the mode, and therefore the pipeline repairing quality is guaranteed.
Optionally, as shown in fig. 5, grease N may be further disposed in the lining hose C, wherein a steel wire of the traction airbag M may be placed on the grease N, so as to avoid the steel wire from being directly contacted with the lining hose C to be scratched in the process of dragging the steel wire, and reduce friction force, thereby facilitating dragging the airbag M.
Step 204: the curing conditions of the lining hose are controlled in stages so that the thermosetting resin is cured.
Wherein, the stage of controlling the curing condition comprises a first stage, a second stage and a third stage which are sequentially carried out according to the curing time sequence. That is, during the curing of the lining hose C, the first stage is performed, the second stage is performed, and the third stage is performed to complete the overall curing process of the lining hose C.
That is, in the embodiment of the present disclosure, step 204 may include the following steps.
Step 204 a: in the first stage, the temperature of the lining hose is adjusted to a first temperature interval, and the pressure in the lining hose is controlled to be in the first pressure interval.
Step 204 b: and in the second stage, the temperature of the lining hose is increased from the first temperature interval to the second temperature interval, and the pressure in the lining hose is controlled to be reduced from the first pressure interval to the second pressure interval.
Step 204 c: in the third stage, the lining hose is naturally cooled, and the pressure in the lining hose is controlled to be kept in the second pressure interval.
In an implementation manner of the present disclosure, the steps 204a to 204c may include:
in the first stage, a fluid medium with a temperature within a first temperature range is introduced into the lining hose C.
As shown in fig. 4, when the temperature of the fluid medium introduced into the lining hose C is adjusted, the temperature of the fluid medium introduced may be adjusted by using a heating tank G communicating with one end of the lining hose C.
The heating tank G can be internally provided with a heater, so that the fluid medium in the heating tank G is exchanged with the heat medium, and the temperature of the fluid medium is raised. For example, the heating tank G may be an electric heating tank.
For example, if the fluid medium is air, the heating tank G may be installed on a pipeline between the air compressor F and the lining hose C, the air compressor F will control the pressurized air to be delivered to the heating tank G, the heating tank G will heat the pressurized air to the required temperature, the air will be delivered to the lining hose C after the air reaches the required temperature, and the resin in the lining hose C will be heated and cured.
In the first stage, it is also necessary to control the pressure inside the lining hose C in a first pressure interval. Thus, the pressure in the lining hose C can be increased gradually by means of continuously feeding the fluid medium with a temperature in the first temperature interval into the lining hose C until the pressure in the lining hose C reaches the first pressure interval.
Alternatively, as shown in fig. 4, if there is a pressure deviation in the lining hose C during the filling process, a pressure relief valve H communicated with the other end of the lining hose C may be used to adjust the pressure of the fluid medium in the lining hose C.
Wherein, relief valve H can be the controllable valve of valve pressure release value, and when relief valve H need control lining hose C pressure and reach a definite value, can control the aperture size of relief valve H's pressure release mouth to and the pressure release is long, thereby adjust the pressure value in the lining hose C to a definite value. For example, the pressure relief valve H may be an adjustable pressure relief valve.
For example, if the fluid medium is air, the pressure relief valve H may be installed on a plug E at the other end of the lining hose C, and a pressure gauge communicated with the lining hose C may be further installed on the plug E, and the pressure value of the lining hose C may be determined by the pressure gauge. When pressure value is higher than the pressure value that needs regulation and control in the inside lining hose C, then can be through the opening and the pressure release of the pressure release mouth of adjustment relief valve H long, adjust the pressure value of air in the inside lining hose C to the pressure value that needs regulation and control.
To the implementation that adopts gasbag control inside lining hose C and wait to restore the inner wall laminating of pipeline J, the relief valve can be installed in the one end of inside lining hose C and heating tank G or air heating pipe L intercommunication to conveniently adjust the pressure value in the inside lining hose C.
In the first step, the curing process of the lining hose C is in the first stage, which is briefly described below in connection with a specific fluid medium and the regulation of temperature and pressure.
Illustratively, in the first stage, as shown in fig. 4, air may be pressurized by an air compressor F, and then, the pressurized air is delivered to a heating tank G to be heated, and the temperature of the air is adjusted to a first temperature interval. For example, 70 ℃ to 110 ℃, the temperature of the air may be adjusted to 90 ℃ in embodiments of the present disclosure.
When the air compressor F is used for pressurizing air, the air compressor F can be used for continuously introducing air into the lining hose C until the pressure of the lining hose is pressurized to a first pressure interval. For example, the first pressure range is 50Kpa to 70 Kpa.
Illustratively, in the first stage, the air compressor F may be used to continuously deliver air to boost the pressure of the air in the liner hose C to 60 Kpa.
In some lined hoses with fibrous materials, for example, fiberglass hoses. For this type of lining hose, in the first stage, air of a first temperature range with a lower temperature is used in order to avoid rapid curing of the resin in the lining hose C; the air in the first pressure interval with higher pressure is used for enabling the resin which is not completely cured in the lining hose C to penetrate into the fiber material of the lining hose C, so that after the lining hose C is cured subsequently, the cured resin can be fully combined with the lining hose C, and the curing quality of the lining hose C is improved.
In the first stage, air with a temperature in the first temperature range and a pressure in the first pressure range is introduced into the lining hose C for 20 to 30 minutes to ensure that the resin can fully and sufficiently permeate into the fiber material of the lining hose C in the first stage.
It should be noted that the duration of the air injection may be determined according to the size specification of the lining hose, and the disclosed embodiment is not limited thereto. For example, for a pipe to be repaired having a larger inner diameter, a hose lining with a size specification matching the pipe to be repaired is selected, so that the duration of air injection can be correspondingly prolonged.
In some lined hoses that do not have a fibrous material, for example, hoses made of polyurethane materials. For the lining hose C, in the first stage, air with a first temperature interval with lower temperature is adopted to preheat the lining hose C; the air in the first pressure interval with higher pressure is used for ensuring that the introduced air can support the lining hose C, so that the outer wall surface of the lining hose C is tightly attached to the inner wall of the pipeline to be repaired.
In the first stage, air with a temperature within the first temperature range and a pressure within the first pressure range needs to be introduced into the lining hose C for 20 to 30 minutes, so as to ensure that a good preheating effect can be achieved in the first stage, and the lining hose C is sufficiently attached to the inner wall of the pipeline to be repaired.
And step two, in the second stage, discharging the fluid medium in the lining hose C, and simultaneously introducing the fluid medium with the temperature within a second temperature interval into the lining hose C until the temperature of the lining hose C is increased to the second temperature interval.
For example, in the second stage, as shown in fig. 4, the air may be pressurized by the air compressor F, and then, the pressurized air is delivered to the heating tank G to be heated, and the temperature of the air is adjusted to the second temperature zone. E.g., 150 c or higher, the temperature of the air may be adjusted to 160 c in the disclosed embodiment.
In the second stage, it is also necessary to control the pressure in the lining hose C to decrease from the first pressure interval to the second pressure interval.
Wherein, the second step of pressure reduction process may include: after the air compressor F is used for introducing the air in the second temperature interval into the lining hose C, the pressure relief valve H is used for relieving the pressure of the air in the lining hose C, and the pressure value in the lining hose C can be always maintained in the second pressure interval. For example, 20Kpa to 30 Kpa.
In the second stage, air with a higher temperature in a second temperature range is adopted, so that the resin in the lining hose C is completely cured at the stage, and the hardness of the lining hose C is fully enhanced; the air of the second pressure interval having a pressure lower than the first pressure interval is used in order to rapidly and completely cure the resin to be cured in the inner liner hose C while maintaining a suitable pressure environment.
In the second stage, air with a temperature in the second temperature range and a pressure in the second pressure range needs to be introduced into the lining hose C for 2 to 5 hours, so as to ensure that the resin can be fully cured in the curing stage, and the lining hose C can be well attached to the pipeline J to be repaired.
And step three, in the third stage, naturally cooling the lining hose, and controlling the pressure in the lining hose to be kept in the second pressure interval.
The third stage may be to stop the introduction of the fluid medium into the lining hose C and control the pressure of the fluid medium in the lining hose C to be maintained in the second pressure interval.
In the embodiment of the present disclosure, in the third stage, air is not introduced into the lining hose C, that is, neither the air compressor F nor the heating tank G is in operation. At this time, the pressure relief valve H is no longer used to relieve the pressure of the air in the liner hose C, so that the pressure value in the liner hose C can be maintained between 20Kpa and 30 Kpa.
In the third stage, no air is introduced into the lining hose C, so that the lining hose C is naturally cooled down in this stage; and the control pressure is in the second pressure interval, so that the condition that the lining hose C collapses due to rapid reduction of the pressure before the temperature in the lining hose C is reduced to the ambient temperature can be avoided, and the lining hose C can be more stably attached to the pipeline J to be repaired.
In the third stage, the air pressure in the lining hose C needs to be kept at the second pressure for 20 to 30 minutes to ensure that the lining hose C is sufficiently tightly attached to the pipe J to be repaired in the third stage.
According to the implementation mode, fluid media with different temperatures and pressures are introduced into the lining hose C according to different stages, so that the resin in the lining hose C can be fully cured, and the lining hose C is stably fixed in the pipeline J to be repaired.
In another implementation manner of the present disclosure, the steps 204a to 204c may include:
in the first stage, the wires in the wall of the lining hose C are energized until the temperature of the lining hose C rises to a first temperature interval.
Wherein, the lining hose C is embedded with metal wires. After the metal wire is embedded in the lining hose C, the lining hose C may be energized so that the metal wire generates heat after being energized, thereby heating the resin in the lining hose C to cure the resin.
For example, the metal wire embedded in the lining hose C may be arranged along the axial direction of the lining hose C and/or wound along the circumferential direction of the lining hose C. That is, the metal wire may be disposed on the inner liner hose C in the axial direction of the inner liner hose C, may be wound around the inner liner hose C in the circumferential direction of the hose, and may be disposed and wound around the inner liner hose C in the axial direction at the same time.
Adopt above-mentioned mode with the wire embedded in inside lining hose C, can effectively increase the area of contact of wire and inside lining hose C to after the wire circular telegram, the heat that the wire produced that generates heat is received to each regional homoenergetic on the inside lining hose C, and then makes the resin of each department can be even simultaneously in the inside lining hose C, in order to guarantee inside lining hose C curing effect, make inside lining hose C everywhere regional homoenergetic stable and reliable and treat that the inner wall laminating of restoreing pipeline J is in the same place.
Fig. 6 is a schematic diagram of a third state of a trenchless pipeline repairing method according to an embodiment of the disclosure. As shown in fig. 6, in the embodiment of the present disclosure, a generator I may be disposed at the opening a of the inspection well, wherein the generator I is a mechanical device that converts other forms of energy into electric energy, and may be driven by a water turbine, a steam turbine, a diesel engine, or other power machinery, and converts energy generated by water flow, air flow, fuel combustion, or nuclear fission into mechanical energy into electric energy. The generator I can be connected with one end of the lining hose C by adopting a conducting wire, so that when the generator I works, the metal wire in the lining hose C can receive electric energy to generate heat, and therefore all areas in the lining hose C can stably generate heat, and resin in the lining hose C is fully and rapidly cured.
In the first stage, it is also necessary to control the pressure inside the lining hose C in a first pressure interval. The pressure in the lining tube can thus be brought about by means of a continuous supply of fluid medium into the lining tube C until the first pressure interval is reached.
In the first stage, the lining hose C needs to be powered on and the temperature of the lining hose C is kept in the first temperature interval, and the pressure of the lining hose C is kept in the first pressure interval for 20 to 30 minutes, so that a good preheating effect can be achieved in the first stage, and the lining hose C is sufficiently attached to the inner wall of the pipeline to be repaired.
And secondly, in the second stage, increasing the current in the metal wire until the temperature of the lining hose is increased to a second temperature interval.
In the second step, the working power of the generator I can be increased to increase the current conveyed to the metal wire, so that the heat productivity of the metal wire in the lining hose C is increased, the temperature of each position in the lining hose C can be increased from the first temperature interval to the second temperature interval, the resin curing in the lining hose C can be accelerated by increasing the temperature of the lining hose C, and the lining hose C in the second stage can be rapidly and completely cured.
In the second stage, it is also necessary to control the pressure in the lining hose C to decrease from the first pressure interval to the second pressure interval. The specific pressure reduction mode may be the same as the pressure reduction mode through the pressure reduction valve, and details are not repeated in the embodiment of the disclosure.
In the second stage, it is necessary to electrify the lining hose C and maintain the temperature of the lining hose C in the first temperature range and the pressure in the first pressure range for 2 to 5 hours, so as to ensure that the resin can be fully cured in the curing stage, so that the lining hose C can be well attached to the pipeline J to be repaired.
And step three, in the third stage, naturally cooling the lining hose, and controlling the pressure in the lining hose to be kept in the second pressure interval.
The third stage may be to stop the energization of the lining hose C and to control the pressure of the fluid medium in the lining hose C to be maintained in the second pressure interval.
In the disclosed embodiment, in the third phase, the lining hose C is no longer energized, i.e. the generator I is not operating in the process. At this time, the pressure relief valve H is no longer used to relieve the pressure of the air in the liner hose C, so that the pressure value in the liner hose C can be maintained between 20Kpa and 30 Kpa.
In the third stage, the pressure in the lining hose C needs to be maintained at the second pressure for 20 to 30 minutes, so as to ensure that the lining hose C is sufficiently and tightly attached to the pipeline J to be repaired in the third stage.
Step 205: and (5) opening two ends of the lining hose C to obtain the repaired pipeline.
Fig. 7 is a schematic diagram of a fourth state of the method for repairing the pipe by excavating outside the pipeline according to the embodiment of the present disclosure. As shown in fig. 7, step 204 may include: and cutting off the part of the two ends of the lining hose C, which axially exceeds the pipeline J to be repaired, so as to remove the plug, and conducting the lining hose C to obtain the repaired pipeline.
In the implementation mode, if the installation position of the plug E is located outside the pipeline J to be repaired, the part, protruding out of the pipeline J to be repaired, of the lining hose C can be directly cut off from the lining hose C together with fixing pieces such as the plug E and the hoop by using a shearing tool, so that the subsequent process of dismantling the fixing pieces is avoided, the construction operation time is shortened, and the efficiency is improved.
In the above implementation manner, if the installation position of the plug E is located in the pipeline J to be repaired, fixing members such as the plug E and the clamp need to be detached from the lining hose C, and then the part of the lining hose C protruding out of the pipeline J to be repaired is cut off from the lining hose C by using a shearing tool, so as to achieve the conduction of the lining hose C.
The embodiment of the disclosure provides a pipeline repairing method, because the lining hose is heated while the fluid medium is introduced, the thermosetting resin of the lining hose is cured, so as to improve the overall hardness of the lining hose, and the lining hose can be fixed on the inner wall of the pipe to be repaired. Therefore, the lining hose is heated while the fluid medium is introduced, so that the step of placing the ultraviolet lamp assembly into the lining hose after the fluid medium is introduced can be avoided. The steps of introducing the fluid medium and curing the resin are combined and executed at the same time, so that the time of construction operation is saved, the construction flow is simplified, and the efficiency of pipeline repair can be greatly improved.
Although the present disclosure has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure.
Claims (10)
1. The trenchless pipeline repairing method is characterized by comprising the following steps:
pulling a lining hose into a pipeline to be repaired, wherein the wall of the lining hose is provided with liquid thermosetting resin;
plugging two ends of the lining hose;
controlling the lining hose to be attached to the inner wall of the pipeline to be repaired;
controlling the curing conditions of the lining hose in stages such that the thermosetting resin cures, at least one of the pressure within the lining hose and the temperature of the lining hose being different at different said stages;
and opening two ends of the lining hose to obtain the repaired pipeline.
2. The trenchless rehabilitation method of claim 1 wherein said controlling the curing conditions of the lining hose in stages comprises:
in the first stage, the temperature of the lining hose is adjusted to a first temperature interval, and the pressure in the lining hose is controlled to be in a first pressure interval;
in the second stage, the temperature of the lining hose is increased from the first temperature interval to a second temperature interval, and the pressure in the lining hose is controlled to be reduced from the first pressure interval to a second pressure interval;
in the third stage, the lining hose is naturally cooled, and the pressure in the lining hose is controlled to be kept in the second pressure interval.
3. The trenchless rehabilitation method of claim 2, wherein adjusting the temperature of the lining hose to a first temperature interval comprises:
introducing a fluid medium with the temperature within a first temperature interval into the lining hose; alternatively, the first and second electrodes may be,
and electrifying the metal wires in the pipe wall of the lining hose until the temperature of the lining hose is increased to the first temperature interval.
4. The trenchless rehabilitation method of claim 3, wherein said increasing the temperature of the lining hose from the first temperature zone to a second temperature zone comprises:
discharging the fluid medium in the lining hose, and introducing the fluid medium with the temperature within a second temperature interval into the lining hose at the same time until the temperature of the lining hose is increased to the second temperature interval; alternatively, the first and second electrodes may be,
increasing the current in the wire until the temperature of the lining hose increases to the second temperature interval.
5. The trenchless rehabilitation method of claim 3 or 4, wherein the wire is arranged in an axial direction of the lining hose and/or wound in a circumferential direction of the lining hose.
6. The trenchless rehabilitation method of claim 2 wherein said controlling the pressure in the liner hose to a first pressure interval comprises:
continuously introducing a fluid medium into the lining hose until the pressure of the lining hose reaches the first pressure interval;
the controlling the pressure within the liner hose from the first pressure interval to a second pressure interval comprises:
and discharging the fluid medium in the lining hose by using a pressure relief valve until the pressure in the lining hose is reduced from the first pressure interval to the second pressure interval.
7. The trenchless rehabilitation method of claim 2, wherein the first temperature range is 70 ℃ to 110 ℃, the second temperature range is 150 ℃ or more, the first pressure range is 50Kpa to 70Kpa, and the second pressure range is 20Kpa to 30 Kpa.
8. The trenchless rehabilitation method for pipeline as claimed in any one of claims 1 to 4 or 6, wherein after the pulling the lining hose into the pipeline to be rehabilitated, the method further comprises:
pulling the bladder to one end of the lining hose;
control lining hose with treat the inner wall laminating of restoreing the pipeline, include:
inflating the air bag to make the air bag open one end of the lining hose;
and drawing the air bag from one end of the lining hose to the other end of the lining hose so that the lining hose is attached to the inner wall of the pipeline to be repaired.
9. The trenchless rehabilitation method of any of claims 1 to 4 or 6, wherein the plugging both ends of the lining hose comprises:
and plugs are inserted into two ends of the lining hose, and the plugs are fixedly connected with the lining hose by using hoops.
10. The trenchless rehabilitation method of claim 9, wherein said opening both ends of the lining hose comprises:
and cutting off the part of the two ends of the lining hose which axially exceeds the pipeline to be repaired so as to remove the plug.
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| CN202010898895.0A CN111963814B (en) | 2020-08-31 | 2020-08-31 | Pipeline non-excavation repairing method |
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| CN202010898895.0A CN111963814B (en) | 2020-08-31 | 2020-08-31 | Pipeline non-excavation repairing method |
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| GB2354809A (en) * | 1997-12-11 | 2001-04-04 | Fosroc International Ltd | Lining an enclosure and curing the lining |
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| DE102012107989A1 (en) * | 2012-08-29 | 2014-03-06 | Hradil Spezialkabel Gmbh | Method and device for rehabilitating sewers |
| CN110307440A (en) * | 2019-06-19 | 2019-10-08 | 北京四达基业市政建设工程有限公司 | A kind of pipeline inverted liner restorative procedure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2354809A (en) * | 1997-12-11 | 2001-04-04 | Fosroc International Ltd | Lining an enclosure and curing the lining |
| CN101900239A (en) * | 2010-05-26 | 2010-12-01 | 林永志 | Method for repairing drainage pipeline without water supply suspended |
| DE102012107989A1 (en) * | 2012-08-29 | 2014-03-06 | Hradil Spezialkabel Gmbh | Method and device for rehabilitating sewers |
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