阅读说明：本技术 一种市政老化管道修复方法 (Municipal aged pipeline repairing method ) 是由 夏莹莹 于 2021-01-20 设计创作，主要内容包括：本发明涉及一种市政老化管道修复方法,包括底板、支撑架、压弯装置和捆扎装置,所述的底板上端中部安装有支撑架,支撑架截面呈U型结构,支撑架内部下端均匀设置有转辊,转辊上设置有高密度聚乙烯管,支撑架内部中部安装有压弯装置,支撑架内部右侧安装有捆扎装置。本发明可以解决现有的市政老化管道在进行修复时,通常采用开挖的方式对老化的管的进行更换,然而这种方式导致管道修复的效率低、成本高,影响使用,同时现有的设备在对管道进行压弯时,不能够有效地将胶带贴附到压弯后的管道上,贴附效果差、贴附不均匀,使得压弯后的管道容易发生复原的现象,影响管道的后续安装效果等难题。(The invention relates to a municipal aged pipeline repairing method which comprises a bottom plate, a supporting frame, a bending device and a bundling device, wherein the supporting frame is installed in the middle of the upper end of the bottom plate, the cross section of the supporting frame is of a U-shaped structure, rotating rollers are evenly arranged at the lower end inside the supporting frame, high-density polyethylene pipes are arranged on the rotating rollers, the bending device is installed in the middle inside the supporting frame, and the bundling device is installed on the right side inside the supporting frame. The method can solve the problems that the existing municipal aged pipeline is usually replaced by excavating, but the method causes low pipeline repairing efficiency, high cost and influence on use, and meanwhile, the existing equipment cannot effectively attach the adhesive tape to the bent pipeline when bending the pipeline, so that the bent pipeline is easy to recover due to poor attaching effect and uneven attaching, the subsequent installation effect of the pipeline is influenced, and the like.)

1. The municipal aged pipeline repairing method adopts the following processing equipment, and the processing equipment comprises a bottom plate (1), a support frame (2), a bending device (3) and a binding device (4), and is characterized in that: the middle part of the upper end of the bottom plate (1) is provided with a support frame (2), the section of the support frame (2) is of a U-shaped structure, the lower end inside the support frame (2) is uniformly provided with a rotating roller, a high-density polyethylene pipe is arranged on the rotating roller, the middle part inside the support frame (2) is provided with a bending device (3), and the right side inside the support frame (2) is provided with a bundling device (4); wherein:

the bending device (3) comprises a connecting plate (31), adjusting rods (32) and rolling wheels (33), the connecting plate (31) is installed in the middle of the inside of the supporting frame (2), the adjusting rods (32) with adjustable lengths are evenly installed at the lower ends of the connecting plate (31), the rolling wheels (33) are installed at the lower ends of the adjusting rods (32), the heights of the rolling wheels (33) are gradually reduced from left to right, and the lower ends of the rolling wheels (33) are tightly attached to the high-density polyethylene pipes;

the binding device (4) comprises a connecting frame (41), an adjusting mechanism (42), a transverse plate (43), a pressing mechanism (44), a positioning plate (45) and a discharging mechanism (46), wherein the connecting frame (41) is installed on the right side of the upper end of the bottom plate (1), the cross section of the connecting frame (41) is of a U-shaped structure, through holes are symmetrically formed in the connecting frame (41), the adjusting mechanism (42) is installed at the upper end inside the connecting frame (41), the transverse plate (43) is installed at the lower end of the adjusting mechanism (42), the pressing mechanism (44) is installed at the lower end of the transverse plate (43), the positioning plate (45) is symmetrically installed inside the connecting frame (41), the positioning plate (45) is located below the pressing mechanism (44), the discharging mechanism (46) is arranged on the upper end face of the positioning plate (45), and the;

the pressing mechanism (44) comprises an arc-shaped frame (441), a pressing frame (442), a fixing sleeve (443), a moving sleeve (444) and a connecting spring (445), the arc-shaped frame (441) is arranged inside the connecting frame (41), the fixing sleeve (443) is symmetrically installed on the arc-shaped frame (441), the inside of the fixing sleeve (443) is of a hollow structure, the inside of the fixing sleeve (443) is connected with the moving sleeve (444) in a sliding fit mode, the upper end of the moving sleeve (444) is connected with the transverse plate (43), the connecting spring (445) is arranged on the moving sleeve (444), the pressing frame (442) is installed between the lower ends of the moving sleeve (444), and the pressing frame (442) is located on the inner side of the arc-shaped frame (441);

the municipal aged pipeline repairing method comprises the following steps:

s1, cleaning an aged pipeline: manually cleaning and removing impurities such as sewage, stains and the like remained in the pipeline to be repaired;

s2, bending the polyethylene pipe: the high-density polyethylene pipe is conveyed into the support frame (2), the middle part of the upper end of the polyethylene pipe can be bent by the bending device (3), so that the section of the polyethylene pipe is in a U-shaped structure, then the adjusting mechanism (42) drives the pressing mechanism (44) to move downwards, the fiber adhesive tape on the discharging mechanism (46) is uniformly adhered to the outer side of the bent polyethylene pipe by the pressing mechanism (44), the polyethylene pipe is prevented from being restored, and the function of uniformly adhering the adhesive tape to the outer side of the polyethylene pipe can be realized by the reciprocating motion of the adjusting mechanism (42);

s3, mounting a pipeline: manually feeding the polyethylene pipe bent in the step S2 into the pipeline in the step S1, opening the polyethylene pipe by pressurizing and restoring the polyethylene pipe to the original pipe diameter, so that the polyethylene pipe is expanded to the inner wall of the pipeline to be repaired and is tightly attached to the inner wall of the pipeline to be repaired;

s4, port sealing: and (5) tightly bonding the outer side of the port of the polyethylene pipe installed in the step (S3) with the inner wall of the pipeline to be repaired through a sealant, so as to prevent the water seepage phenomenon.

2. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: adjustment mechanism (42) including driving actuating cylinder (421), linear bearing (422) and guide bar (423), inside upper end of link (41) install and drive actuating cylinder (421), the top that drives actuating cylinder (421) has diaphragm (43) through flange joint, linear bearing (422) are gone up the symmetry and are installed to link (41), linear bearing (422) inside is connected with guide bar (423) through sliding fit's mode, guide bar (423) lower extreme is connected with diaphragm (43).

3. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: drop feed mechanism (46) including material loading roller (461) and wind-up roll (462), the inside right side of link (41) install material loading roller (461) through the bearing, wind-up roll (462) are installed through the bearing in the inside left side of link (41), the winding has the fibre sticky tape on material loading roller (461), fibre sticky tape tip is connected with wind-up roll (462), the motor of being connected with wind-up roll (462) is installed through the motor cabinet to link (41) rear side.

4. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: the positioning plate (45) is of an arc-shaped structure, an arc-shaped groove is formed in the upper end of the positioning plate (45), and rubber rollers are uniformly arranged in the arc-shaped groove through pin shafts.

5. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: the arc-shaped frame (441) is of an arc-shaped structure, a pressing strip is arranged on the inner side face of the arc-shaped frame (441), and the pressing strip is made of rubber materials.

6. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: the pressing frame (442) is of an arc-shaped structure, the middle of the pressing frame (442) is of a hollow structure, a negative pressure cavity is formed inside the pressing frame (442), and air outlet holes are uniformly formed in the lower end face of the pressing frame (442).

7. The method for repairing the municipal aged pipeline according to claim 1, wherein the method comprises the following steps: the pressing frame (442) is made of elastic metal materials.

Technical Field

The invention relates to the field of pipeline repair, in particular to a municipal aged pipeline repairing method.

Background

Municipal administration pipeline, including running water supply pipe, sewer pipe, sewage pipes, natural gas line, heat supply pipeline, steam conduit etc. finish the installation and put into use, there is filth such as impurity to remain at positions such as the in-process pipeline inner wall of installation and takeover department. When the pipeline is used for a long time, residues such as scales, sediments, microorganisms and biological films are attached to the inner wall of the pipeline, the purity and quality requirements of fluid in the pipeline are influenced, the conveying flow of a pipe network is reduced, and the pipeline can be blocked and cannot be used in serious conditions.

At present, the existing municipal aged pipelines generally have the following defects when being repaired and processed: 1. when the existing municipal aged pipeline is repaired, the aged pipeline is usually replaced by adopting an excavation mode, however, the mode causes low pipeline repairing efficiency and high cost, and the use is influenced; 2. the existing equipment cannot effectively attach the adhesive tape to the bent pipeline when the pipeline is bent, the attaching effect is poor, the attaching is uneven, the phenomenon of recovery of the bent pipeline is easy to occur, and the subsequent installation effect of the pipeline is influenced.

Disclosure of Invention

Technical problem to be solved

The method can solve the problems that the existing municipal aged pipeline is usually replaced by excavating, but the method causes low pipeline repairing efficiency, high cost and influence on use, and meanwhile, the existing equipment cannot effectively attach the adhesive tape to the bent pipeline when bending the pipeline, so that the bent pipeline is easy to recover due to poor attaching effect and uneven attaching, the subsequent installation effect of the pipeline is influenced, and the like.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme that the municipal aged pipeline repairing method adopts the following processing equipment, the processing equipment comprises a bottom plate, a supporting frame, a bending device and a binding device, the supporting frame is arranged in the middle of the upper end of the bottom plate, the cross section of the supporting frame is in a U-shaped structure, rotating rollers are uniformly arranged at the lower end inside the supporting frame, high-density polyethylene pipes are arranged on the rotating rollers, the bending device is arranged in the middle inside the supporting frame, and the binding device is arranged on the right side inside the supporting frame.

The device of bending include the connecting plate, adjust pole and roll-in wheel, the inside mid-mounting of support frame have the connecting plate, the pole of adjusting of adjustable length is evenly installed to the connecting plate lower extreme, adjust the pole lower extreme and install the roller wheel, the height of roller wheel is reduced by a left side to the right side gradually, the roll-in wheel lower extreme is hugged closely with high density polyethylene pipe, concrete during operation, it can adjust the height of roller wheel to adjust the pole, the roll-in wheel can be buckled high density polyethylene pipe middle part, make high density polyethylene pipe inwards cave in and be U type structure, be convenient for the follow-up use of high density polyethylene pipe.

The binding device comprises a connecting frame, an adjusting mechanism, a transverse plate, a pressing mechanism, a positioning plate and a discharging mechanism, the right side of the upper end of the bottom plate is provided with a connecting frame, the cross section of the connecting frame is of a U-shaped structure, through holes are symmetrically arranged on the connecting frame, the upper end inside the connecting frame is provided with an adjusting mechanism, the lower end of the adjusting mechanism is provided with a transverse plate, the lower end of the transverse plate is provided with a pressing mechanism, the inside of the connecting frame is symmetrically provided with a positioning plate, the positioning plate is positioned below the pressing mechanism, the upper end surface of the positioning plate is provided with a discharging mechanism, the discharging mechanism, the adjusting mechanism drives the pressing mechanism to move downwards, the pressing mechanism evenly adheres the fiber adhesive tape on the discharging mechanism to the outer side of the polyethylene pipe which is bent by pressing, the phenomenon of recovery of the bent polyethylene pipe is prevented, and the reciprocating motion of the adjusting mechanism can realize the function of evenly attaching the adhesive tape to the outer side of the polyethylene pipe.

Hold-down mechanism include the arc frame, compress tightly the frame, the fixed sleeve, remove sleeve and coupling spring, the inside arc frame that is provided with of link, the last symmetry of arc frame installs fixed sleeve, the inside hollow structure that is of fixed sleeve, fixed sleeve is inside to be connected with the movable sleeve through sliding fit's mode, the movable sleeve upper end is connected with the diaphragm, be provided with coupling spring on the movable sleeve, install between the movable sleeve lower extreme and compress tightly the frame, it is inboard that the frame is located the arc frame to compress tightly, when concrete during operation, when adjustment mechanism drives the arc frame through removing the sleeve and descends, the arc frame at first contacts with the locating plate, and then can compress tightly the spacing sticky tape outside, afterwards, adjustment mechanism continues to drive and compresses tightly the frame downstream, compress tightly the frame and then can with the crimping polyethylene outside in the middle part of the.

The municipal aged pipeline repairing method comprises the following steps:

s1, cleaning an aged pipeline: manually cleaning and removing impurities such as sewage, stains and the like remained in the pipeline to be repaired;

s2, bending the polyethylene pipe: the high-density polyethylene pipe is conveyed into the support frame, the middle part of the upper end of the polyethylene pipe can be bent by the bending device, so that the section of the polyethylene pipe is in a U-shaped structure, then the adjusting mechanism drives the pressing mechanism to move downwards, the fiber adhesive tape on the discharging mechanism is uniformly adhered to the outer side of the bent polyethylene pipe by the pressing mechanism, the polyethylene pipe is prevented from being restored, and the function of uniformly adhering the adhesive tape to the outer side of the polyethylene pipe can be realized by the reciprocating motion of the adjusting mechanism;

s3, mounting a pipeline: manually feeding the polyethylene pipe bent in the step S2 into the pipeline in the step S1, opening the polyethylene pipe by pressurizing and restoring the polyethylene pipe to the original pipe diameter, so that the polyethylene pipe is expanded to the inner wall of the pipeline to be repaired and is tightly attached to the inner wall of the pipeline to be repaired;

s4, port sealing: and (5) tightly bonding the outer side of the port of the polyethylene pipe installed in the step (S3) with the inner wall of the pipeline to be repaired through a sealant, so as to prevent the water seepage phenomenon.

Preferably, adjustment mechanism including driving actuating cylinder, linear bearing and guide bar, the inside upper end of link install and drive actuating cylinder, the top that drives actuating cylinder has the diaphragm through flange joint, linear bearing is installed to the symmetry on the link, linear bearing is inside to be connected with the guide bar through sliding fit's mode, the guide bar lower extreme is connected with the diaphragm, specific during operation drives actuating cylinder and can drives hold-down mechanism through the diaphragm and adjust from top to bottom, the guide bar plays spacing effect, guarantees diaphragm up-and-down motion's stability.

Preferably, drop feed mechanism include material loading roller and wind-up roll, the inside right side of link install the material loading roller through the bearing, the wind-up roll is installed through the bearing in the inside left side of link, the winding has the fibre sticky tape on the material loading roller, fibre sticky tape tip is connected with the wind-up roll, the motor of being connected with the wind-up roll is installed through the motor cabinet to the link rear side, specific during operation, the motor can drive the fibre sticky tape through the wind-up roll and rotate, and then can drive the waste material and carry out the rolling, can stimulate the hold-down mechanism below with the sticky tape that is not used simultaneously.

Preferably, the locating plate be the arc structure, the locating plate upper end is provided with the arc wall, evenly installs the rubber roller through the round pin axle in the arc wall, the rubber roller can lead to the fibre sticky tape effectively, can prevent simultaneously that sticky tape and rubber roller from taking place the adhesion.

Preferably, the arc frame be the arc structure, the arc frame medial surface is provided with compresses tightly the strip, compresses tightly the strip and makes for rubber materials, compresses tightly the strip and can compress tightly the fibre sticky tape outside effectively, the sticky tape in the middle part of the fibre sticky tape of being convenient for drops.

Preferably, the frame that compresses tightly be the arc structure, compress tightly the frame middle part and be hollow structure, compress tightly the inside negative pressure chamber that is of frame, evenly be provided with the venthole on the terminal surface under compressing tightly the frame, the negative pressure chamber can be inhaled tightly the sticky tape upper end effectively through the venthole, guarantees the sticky tape can be accurate attached to the polyethylene outside of managing.

Preferably, the compressing frame is made of elastic metal materials, the compressing frame can deform, and when the compressing frame is in contact with the polyethylene pipe, the compressing frame can drive the adhesive tape to be tightly adhered to the polyethylene pipe.

(III) advantageous effects

1. According to the municipal aged pipeline repairing method provided by the invention, the municipal aged pipeline is repaired in a non-excavation mode, and the high-density polyethylene pipe is accurately attached to the inner wall of the municipal pipeline, so that the repairing effect is good, and the repaired pipeline has the rigidity of the aged pipeline and the corrosion resistance of the polyethylene pipe;

2. according to the municipal aged pipeline repairing method provided by the invention, the binding device can effectively and uniformly adhere the adhesive tape to the outer side of the pressed and bent polyethylene pipe, the adhesion effect is good, the adhesion is uniform, manual operation is avoided, meanwhile, the phenomenon of recovery of the polyethylene pipe adhered with the adhesive tape can be prevented, and the subsequent processing of the polyethylene pipe is facilitated;

3. according to the municipal aged pipeline repairing method provided by the invention, the negative pressure cavity arranged in the pressing frame can suck the upper end of the adhesive tape tightly, so that the adhesive tape is prevented from being separated, the subsequent bonding of the adhesive tape is facilitated, and meanwhile, the pressing frame is made of an elastic metal material, so that the pressing frame can effectively press and connect the adhesive tape on the polyethylene pipe.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic cross-sectional view of the bottom plate of the strapping device of the present invention;

FIG. 4 is a schematic cross-sectional view of the connecting frame, the adjusting mechanism, the cross plate and the pressing mechanism;

FIG. 5 is a schematic cross-sectional view of the hold-down frame of the present invention;

fig. 6 is a schematic view of the structure of the fiber tape used in the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 to 6, the municipal aged pipeline repairing method adopts the following processing equipment, the processing equipment comprises a bottom plate 1, a support frame 2, a bending device 3 and a binding device 4, the support frame 2 is installed in the middle of the upper end of the bottom plate 1, the cross section of the support frame 2 is of a U-shaped structure, rotating rollers are evenly arranged at the lower end inside the support frame 2, high-density polyethylene pipes are arranged on the rotating rollers, the bending device 3 is installed in the middle inside the support frame 2, and the binding device 4 is installed on the right side inside the support frame 2.

Device 3 of bending include connecting plate 31, adjust pole 32 and roller 33, 2 inside mid-mounting of support frame have connecting plate 31, the pole 32 of adjusting length is evenly installed to connecting plate 31 lower extreme, adjust the pole 32 lower extreme and install roller 33, roller 33's height is reduced by a left side to the right side gradually, roller 33 lower extreme and high density polyethylene pipe are hugged closely, concrete during operation, it can adjust roller 33's height to adjust pole 32, roller 33 can be to high density polyethylene pipe middle part buckling, make high density polyethylene pipe inwards cave in and be U type structure, be convenient for the follow-up use of high density polyethylene pipe.

The binding device 4 comprises a connecting frame 41, an adjusting mechanism 42, a transverse plate 43, a pressing mechanism 44, a positioning plate 45 and a discharging mechanism 46, the connecting frame 41 is installed on the right side of the upper end of the bottom plate 1, the cross section of the connecting frame 41 is of a U-shaped structure, through holes are symmetrically formed in the connecting frame 41, the adjusting mechanism 42 is installed at the upper end inside the connecting frame 41, the transverse plate 43 is installed at the lower end of the adjusting mechanism 42, the pressing mechanism 44 is installed at the lower end of the transverse plate 43, the positioning plate 45 is symmetrically installed inside the connecting frame 41, the positioning plate 45 is located below the pressing mechanism 44, the discharging mechanism 46 is arranged on the upper end face of the positioning plate 45, the discharging mechanism 46 is installed on the connecting frame 41, during specific work, the adjusting mechanism 42 drives the pressing mechanism 44 to move downwards, the pressing mechanism 44 uniformly adheres fiber tapes on the discharging mechanism 46 to the outer side, the reciprocating motion of the adjusting mechanism 42 can realize the function of uniformly attaching the adhesive tape to the outer side of the polyethylene pipe.

Adjustment mechanism 42 including driving actuating cylinder 421, linear bearing 422 and guide bar 423, the inside upper end of link 41 install and drive actuating cylinder 421, the top that drives actuating cylinder 421 has diaphragm 43 through flange joint, linear bearing 422 is installed to the symmetry on link 41, linear bearing 422 is inside to be connected with guide bar 423 through sliding fit's mode, guide bar 423 lower extreme is connected with diaphragm 43, during specific work, it can drive hold-down mechanism 44 through diaphragm 43 and adjust from top to bottom to drive actuating cylinder 421, guide bar 423 plays spacing effect, guarantee diaphragm 43 up-and-down motion's stability.

The pressing mechanism 44 includes an arc frame 441, a pressing frame 442, a fixed sleeve 443, a movable sleeve 444 and a connecting spring 445, the connecting frame 41 is internally provided with an arc-shaped frame 441, the arc-shaped frame 441 is symmetrically provided with fixing sleeves 443, the fixing sleeves 443 are internally of a hollow structure, the fixing sleeves 443 are internally connected with movable sleeves 444 in a sliding fit manner, the upper ends of the movable sleeves 444 are connected with the transverse plate 43, the movable sleeves 444 are provided with connecting springs 445, a pressing frame 442 is arranged between the lower ends of the movable sleeves 444, the pressing frame 442 is positioned on the inner side of the arc-shaped frame 441, during the concrete work, when the adjusting mechanism 42 drives the arc-shaped frame 441 to descend through the moving sleeve 444, the arc-shaped frame 441 first contacts with the positioning plate 45, and then can compress tightly the spacing sticky tape outside, later, adjustment mechanism 42 continues to drive and compresses tightly frame 442 downstream, compresses tightly frame 442 and then can with the fibre sticky tape middle part crimping to the polyethylene pipe outside.

The arc frame 441 is of an arc structure, the inner side face of the arc frame 441 is provided with a pressing strip, the pressing strip is made of rubber materials, the pressing strip can effectively press the outer side of the fiber adhesive tape, and the adhesive tape in the middle of the fiber adhesive tape can fall off conveniently.

The frame 442 that compresses tightly be the arc structure, compress tightly the frame 442 middle part and be hollow structure, compress tightly the inside negative pressure chamber that is of frame 442, compress tightly evenly to be provided with the venthole on the terminal surface under the frame 442, the negative pressure chamber can be effectively to the sticky tape upper end inhale tightly through the venthole, guarantee that the sticky tape can be accurate attached to the polyethylene outside of managing.

The pressing frame 442 is made of elastic metal materials, the pressing frame 442 can deform, and when the pressing frame 442 contacts with the polyethylene pipe, the pressing frame 442 can drive the adhesive tape to be tightly adhered to the polyethylene pipe.

Locating plate 45 be the arc structure, locating plate 45 upper end is provided with the arc wall, evenly installs the rubber roller through the round pin axle in the arc wall, the rubber roller can lead to the fibre sticky tape effectively, can prevent simultaneously that sticky tape and rubber roller from taking place the adhesion.

Drop feed mechanism 46 include material loading roller 461 and wind-up roll 462, the inside right side of link 41 install material loading roller 461 through the bearing, wind-up roll 462 is installed through the bearing in the inside left side of link 41, the winding has the fibre sticky tape on material loading roller 461, fibre sticky tape tip is connected with wind-up roll 462, the motor of being connected with wind-up roll 462 is installed through the motor cabinet to link 41 rear side, during specific work, the motor can drive the fibre sticky tape through wind-up roll 462 and rotate, and then can drive the waste material and roll, can stimulate the sticky tape that is not used to hold-down mechanism 44 below simultaneously.

The municipal aged pipeline repairing method comprises the following steps:

s1, cleaning an aged pipeline: manually cleaning and removing impurities such as sewage, stains and the like remained in the pipeline to be repaired;

s2, bending the polyethylene pipe: the high-density polyethylene pipe is conveyed into the support frame 2, the middle part of the upper end of the polyethylene pipe can be bent by the bending device 3, so that the section of the polyethylene pipe is in a U-shaped structure, then the adjusting mechanism 42 drives the pressing mechanism 44 to move downwards, the fiber adhesive tape on the discharging mechanism 46 is uniformly adhered to the outer side of the bent polyethylene pipe by the pressing mechanism 44, the polyethylene pipe is prevented from being restored, and the function of uniformly adhering the adhesive tape to the outer side of the polyethylene pipe can be realized by the reciprocating motion of the adjusting mechanism 42;

s3, mounting a pipeline: manually feeding the polyethylene pipe bent in the step S2 into the pipeline in the step S1, opening the polyethylene pipe by pressurizing and restoring the polyethylene pipe to the original pipe diameter, so that the polyethylene pipe is expanded to the inner wall of the pipeline to be repaired and is tightly attached to the inner wall of the pipeline to be repaired;

s4, port sealing: and (5) tightly bonding the outer side of the port of the polyethylene pipe installed in the step (S3) with the inner wall of the pipeline to be repaired through a sealant, so as to prevent the water seepage phenomenon.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.