Pipeline lining repairing method and device

Abstract

The invention discloses a pipeline lining repairing method and device and a pipeline lining repairing device.The pipeline lining repairing device comprises annular steel pipes distributed front and back, the annular steel pipes distributed front and back are connected through longitudinal steel pipes, the outer layers of the longitudinal steel pipes are sleeved with steel pipes with larger diameters, and the annular steel pipes distributed front and back are provided with #-shaped steel pipe supports; an equipment platform is arranged on an annular steel pipe distributed front and back, the equipment platform is located at the 8 / 10-8.5 / 10 height position of the annular steel pipe, two electric hoists are arranged on the equipment platform in a left-right mode, and sliding idler wheels are arranged on the annular steel pipe. The specific lining repair method of the device is shown in the specification, when steel plate lining repair welding is conducted in a large-diameter pipeline, the construction space is limited, and the device solves the problems of hoisting, splicing and ring welding of steel plates in a narrow space.

Description

Technical Field

[0001] The invention relates to the technical field of municipal construction, and in particular to a pipeline lining repair method and device. Background Art

[0002] One of the difficulties in the existing pipeline lining repair work in the field of municipal construction is the movement of the lining steel plate in the pipeline. The utility model case with publication number CN222540286U provides a fixing frame used on a stainless steel lining pipe, which includes an annular steel plate ring and a channel steel base arranged on the inner side of the pipeline. The channel steel base includes two supporting channel steels and a connecting channel steel welded and fixed between the two supporting channel steels. A plurality of annular steel plate rings are installed between the two supporting channel steels, and the bottom ends of the annular steel plate rings are welded and fixed to the connecting channel steel. A gap for the installation of the lining plate is reserved between the annular steel plate rings and the pipeline. A plurality of steel pipe horizontal supports are welded and fixed between two adjacent annular steel plate rings, and a plurality of steel pipe vertical supports are welded and fixed between the annular steel plate rings and the supporting channel steels. A central channel steel seat is fixed at the top center of the two connecting channel steels, an electric hoist is fixed on the central channel steel seat, a pulley is installed on a steel pipe horizontal support at the highest point, and a lifting chain on the electric hoist passes through the pulley and is installed with a hook. Although the fixing frame can improve the efficiency of repair work, the work quality and efficiency are still unsatisfactory, which is mainly reflected in the following aspects:

[0003] 1. The fixed frame will occupy part of the space inside the narrow pipeline, which will make it difficult for personnel and materials to pass through. This will directly lead to a decrease in the efficiency of on-site operations. In addition, personnel will have to detour on both sides of the fixed frame, which is quite unfavorable for the work convenience of on-site workers. The direct consequence of personnel repeatedly detouring around the fixed frame is that the construction efficiency of the workers is greatly reduced.

[0004] Second, the fixed frame has a large deadweight. In the narrow space inside the pipeline, it is quite difficult to move the fixed frame when transferring the working surface, which will undoubtedly greatly reduce the continuity of subsequent operations.

[0005] 3. The lining is prone to position deviation after lifting. If the lining position exceeds the preset requirements during the lining repair process, it is easy to bring hidden dangers to subsequent use. This is caused by poor quality of lining repair. Summary of the invention

[0006] The object of the present invention is to provide a pipeline lining repair method, which can complete the pipeline lining repair work while taking into account the stability of the repair quality and the high efficiency of the repair work.

[0007] Another object of the present invention is to provide a pipeline lining repair device, which can improve the quality and operation efficiency of lining repair.

[0008] The pipeline lining repair device provided by the present invention includes annular steel pipes (1) distributed front and back. The annular steel pipes (1) distributed front and back are connected by longitudinal steel pipes (2). The distance between the annular steel pipes distributed front and back is greater than the width of the steel plate lining. A steel pipe with a slightly larger diameter is sleeved outside the longitudinal steel pipe. The annular steel pipes distributed front and back are provided with cross-shaped steel pipe supports. An equipment platform is arranged on the annular steel pipes distributed front and back. The equipment platform is located at the position of 8 / 10 - 8.5 / 10 of the height of the annular steel pipe. Two electric hoists are arranged on the equipment platform in a left-right manner. The annular steel pipes are provided with sliding rollers.

[0009] In the pipeline lining repair device provided by the present invention, the device is an integral modular structure, which is convenient for being integrally put into the pipeline for construction operations.

[0010] In the pipeline lining repair device provided by the present invention, the inner diameter of the steel pipe sleeved outside the longitudinal steel pipe is 2 - 5 mm larger than the outer diameter of the longitudinal steel pipe. The outer sleeved steel pipe can not only protect the inner steel pipe by using the position where its inner diameter is larger than the outer diameter of the inner steel pipe, but also take into account its own rollable characteristics to facilitate reducing the difficulty of pulling during the lifting of the steel plate lining.

[0011] In the pipeline lining repair device provided by the present invention, the cross-sections of the front and rear annular steel pipes are square.

[0012] The present invention also provides a pipeline lining repair method, which includes the step of using the pipeline lining repair device as described in any one of claims 1 - 4 for lining repair.

[0013] The pipeline lining repair method provided by the present invention, the steps of the lining repair include: the step of manufacturing stainless steel pipe segments, the step of transporting stainless steel pipe segments, the step of laying and welding stainless steel pipe segments. The step of laying and welding stainless steel pipe segments includes:

[0014] (1) Stack the steel plate lining at the preset installation position of the pipeline. Move the pipeline lining repair device to the position of the steel pipe lining, and use one of the hoists of the pipeline lining repair device to pull the topmost steel plate to one side;

[0015] (2) After the first steel plate slides up along the longitudinal steel pipe to the corresponding position, spot-weld the first and second steel plates in place;

[0016] (3) Pull the first and second steel plates as a whole to one side, and use the other hoist of the pipeline lining repair device to pull the third steel plate in the opposite direction;

[0017] (4) After the third steel plate is pulled to the designated position, spot-weld it to the fourth steel plate;

[0018] (5) After the third and fourth steel plates are fixed, they are pulled up to the other side as a whole, and the angle is adjusted to overlap with the left steel plate to form a complete ring;

[0019] (5) After one ring is completed, the pipeline lining repair device is moved to the next working surface through the bottom pulley to weld the steel plate of the next ring.

[0020] The pipeline lining repair method provided by the present invention also includes: a step of installing a water stop belt and a step of grouting behind the wall.

[0021] In the pipeline lining repair method provided by the present invention, the step of installing the water stop strip comprises:

[0022] After adding the stainless steel lining, a buried steel-edge rubber waterstop is installed at the circumferential seam of the lining steel ring at every 6m between the original pipe joints. The middle rubber waterstop is made of chloroprene rubber.

[0023] There is a steel edge on each side of the rubber waterstop. After the previous ring of stainless steel segments is installed, the steel edge at one end of the waterstop is welded and fixed to the studs on the outside of the stainless steel lining, and the other end is welded to the steel bars on the inner wall of the original pipeline to ensure that the waterstop does not move during grouting.

[0024] After the stainless steel linings on both sides of the water stop are installed, the stainless steel linings are disconnected 30mm at the joints, and the joints are sealed with two-component polysulfide sealant, so that the surface of the expansion joints is clean, dry, dust-free and oil-free;

[0025] The step of back-grouting comprises:

[0026] (1) Grouting pipe layout: After the stainless steel welding is completed, the area between the two feeding wells is used as a grouting section. The grouting holes are divided into 12 o'clock, 9 o'clock, 6 o'clock and 3 o'clock directions. Grouting is performed at four points. The grouting holes are prefabricated in advance according to the segment position numbers during segment processing. Before grouting each section, high-pressure clean water should be injected into the gap behind the wall through the high-position grouting hole at 12 o'clock to clean the gap behind the wall. The flushing water flowing out of the low-position grouting hole is clean water before subsequent grouting can be carried out;

[0027] (2) Full-height support: The support adopts full-height steel pipe support. Three horizontal braces and three vertical braces are set in one section, with a spacing of 80 cm along the length of the pipeline. The construction time is 8 hours for erecting the full-height steel pipe support and 8 hours for dismantling the full-height steel pipe support;

[0028] (3) Mortar mixing: chlorate cement is used as the main gelling material in mortar;

[0029] (4) Grouting: a. The grouting sequence is to grout from 6 o'clock to 9 o'clock until grout oozes out from 3 o'clock and then stop; b. Close the grouting hole at 6 o'clock and grout from the grouting holes at 9 o'clock and 3 o'clock until grout oozes out from 12 o'clock and then stop; c. When grouting, inject mortar simultaneously on both sides to ensure the same pressure on both sides. Use a rubber hammer to tap the stainless steel side plate every 1 m, once every 5 min, and listen to the echo to check whether the mortar at this point is dense. Assign a special person to check whether the stainless steel plate is deformed and whether the mortar injection volume meets the requirements.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] (1) When repairing and welding the steel plate lining inside a large-diameter pipeline, the construction space is limited. This device solves the problems of lifting, assembling, and welding the steel plate into a ring in a narrow space.

[0032] (2) Through the double-hoist hanging points, the construction progress is accelerated and the load of a single hoist is reduced.

[0033] (3) The longitudinal steel pipe can assist in sharing the weight of the steel plate lining, and can correct the position of the steel plate lining to help the angle not deviate during the formation of the ring, and can assist in aligning when the left and right half-rings are spliced.

[0034] (4) After one ring is spliced, it can be quickly moved to the next working surface through the bottom pulley of this device, improving the construction efficiency.

[0035] (5) A door opening is provided at the bottom of this device to facilitate the passage of personnel and materials. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the pipeline lining repair device in the first embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of four steel plate linings stacked inside the pipeline in the second embodiment of the present invention.

[0038] Figure 3 It is a schematic diagram of the state where the first steel plate is spot-welded and fixed to the second steel plate after the first steel plate slides upward along the longitudinal steel pipe to the corresponding position in the second embodiment of the present invention.

[0039] Figure 4 It is a schematic diagram of the spot-welded fixed connection position in the second embodiment of the present invention.

[0040] Figure 5 It is a schematic diagram of the state where the third steel plate is pulled to the designated position and spot-welded and fixed to the fourth steel plate in the second embodiment of the present invention.

[0041] Figure 6 It is a schematic diagram of the spot-welded fixed connection position in the second embodiment of the present invention. Detailed implementation mode

[0042] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0043] The first implementation mode of the present invention provides a pipeline lining repair device, which includes a ring steel pipe 1, a longitudinal steel pipe, a steel pipe support 3, a sliding roller 4, an electric hoist 2 and other structures. This device is used as a modular integral structure to meet the needs of the lining construction operation of the corresponding pipeline 5. It can not only assist in improving the construction efficiency of the operators, but also take into account safety and ensure the stability of the pipeline lining repair quality. The following will be described in detail with reference to the accompanying drawings.

[0044] See Figure 1 , this device includes ring steel pipes 1 distributed front and back. Using ring steel pipes distributed front and back can restrict the overall size (outer diameter) of the device to ensure smooth movement within the circular pipeline to be repaired. The ring steel pipes 1 distributed front and back are connected by a longitudinal steel pipe 2. The outer layer of the longitudinal steel pipe is sleeved with a steel pipe with a slightly larger diameter. For example, the inner diameter of the steel pipe sleeved on the outer layer of the longitudinal steel pipe is 2-5 mm larger than the outer diameter of the longitudinal steel pipe. This outer sleeved steel pipe can not only protect the inner steel pipe by using the position where its inner diameter is larger than the outer diameter of the inner steel pipe, but also take into account its own rolling characteristics to facilitate reducing the difficulty of pulling during the lifting of the steel plate lining, changing from hard friction lifting to rolling lifting, and minimizing the lifting difficulty of the lining steel plate with a large self-weight. The distance between the ring steel pipes distributed front and back is greater than the width of the steel plate lining, so that the lining steel plate can be placed on the longitudinal steel pipe to achieve rolling lifting. At the same time, the front and back ring steel pipes are used for limiting. The ring steel pipes distributed front and back are provided with a cross-shaped steel pipe support 3. The two ring steel plates are reinforced by the cross-shaped steel pipe support, and a door opening is provided below to facilitate the passage of personnel and materials. An equipment platform is provided on the ring steel pipes distributed front and back. The equipment platform is located at the 8 / 10-8.5 / 10 height position of the ring steel pipe. The equipment platform is provided with two electric hoists in a left-right manner. In this embodiment, an equipment platform is arranged above the device to place two electric hoists for pulling the arc-shaped steel plate lining. By changing the position, the operation efficiency can be improved, and the need for a too-high installation position for a single electric hoist to affect the overall size of the device is avoided. The ring steel pipe is provided with sliding rollers, so that the device can move back and forth inside the pipeline along with the working surface. In this embodiment, there are a total of four pieces of a ring of lining steel plates, each with a thickness of 8 mm, and the stacked thickness on the ground is 32 mm. The rollers can directly roll over, or can pass through after being slightly lifted by a small hydraulic forklift. At the same time, the distance between the ring steel pipes 1 in this embodiment is adjusted to be slightly larger than the width of the steel plate, leaving space for the rollers.

[0045] From Figure 1It can be seen that since the annular steel pipe 1, the longitudinal steel pipe 2, the steel pipe support 3, and the sliding roller 4 are all connected and fixed by means such as welding, the device can appear in the pipeline in an integral modular structure. While meeting the requirements of its own structural strength, transportation and transfer are also more convenient. Especially, the movement in the pipeline is more flexible and convenient. Without occupying the construction operation surface, it is convenient for the operator to perform corresponding lifting actions at the preset installation position of the steel plate lining.

[0046] In the present invention, metal materials are correspondingly adopted to ensure the requirements of structural strength. While the cross-section of the longitudinal steel pipe is circular, the steel pipe sleeved outside is also of circular cross-section to facilitate rolling between them. The cross-sections of the front and rear annular steel pipes of the device are square, which can increase the contact surface for welding and fixing the longitudinal steel pipe.

[0047] In the present invention, the distance between the front and rear annular steel pipes is adjusted to be slightly larger than the width of the lining steel plate. On the one hand, the length of the longitudinal steel pipe is slightly larger than the width of the steel plate, and the front and rear annular steel pipes 1 can limit the lining steel plate. At the same time, the radian of the longitudinal steel pipe is consistent with the radian of the steel plate, which can prevent large deformations of the steel plate during lifting and welding. On the other hand, when the distance between the annular steel pipes 1 is adjusted to be slightly larger than the width of the steel plate, the steel plate can be placed on the longitudinal steel pipe to achieve rolling lifting. Moreover, when the distance between the annular steel pipes 1 is adjusted to be slightly larger than the width of the steel plate, space is left for the rollers.

[0048] The second embodiment of the present invention provides a method for repairing the pipeline lining. This method uses the pipeline lining repair device provided by the first embodiment to repair the lining. Specifically, the steps of this lining repair include: the step of manufacturing stainless steel pipe segments, the step of transporting stainless steel pipe segments, and the step of paving and welding stainless steel pipe segments.

[0049] Before repairing the pipeline lining, there is also a step of preprocessing the inner wall of the pipeline. After the pipeline is dredged, the inner wall of the pipeline is chiseled and washed around. Use a pneumatic pick in cooperation with an integral alloy chiseling hammer to chisel off the hardened milk skin on the surface of the old concrete to form a rough surface. The chiseling should be slight and meticulous, removing all the floating slurry and soft layers on the concrete surface to expose the coarse aggregate, avoiding strip-shaped, dot-shaped or pit-shaped chiseling. When the floating slurry or the soft surface layer is removed, most of the coarse aggregate is exposed. To ensure the chiseling effect, it must be washed with water to clean up the floating slurry and residues, ensuring that the root is clean and moist, but there should be no accumulated water. Rust removal is carried out on the rusted part of the steel bars, and anti-rust paint is applied; the dirt and ineffective caulking materials at the pipeline joints should be washed and removed. If there is groundwater leakage at the original pipeline deformation joint, leakage stoppage should be carried out first. If the original pipeline has large cracks or depressions, epoxy materials (clay steel plates may be used when necessary) should be used for local repair first.

[0050] The steps for manufacturing stainless steel pipe segments include: 1. Before manufacturing the stainless steel inner lining, the information such as the plane and longitudinal section curves of the original pipeline and the joint positions of the original pipeline should be recorded in detail in advance, and the layout and assembly plan drawing of the stainless steel inner lining should be made according to the above information. The layout drawing of the stainless steel inner lining assembly can be used to guide the processing and manufacturing of the stainless steel inner lining only after being confirmed by all parties participating in the construction.

[0051] 2. The inner diameter of the stainless steel pipe segment is 3400mm. Each ring of the stainless steel inner lining consists of 4 pieces, each piece has a ring width of about 75cm and a thickness of 8mm. The materials are customized from professional processing factories and need to have qualification certificates and relevant inspection certificates.

[0052] 3. During the processes of blanking, cutting and hoisting of the stainless steel inner lining, scratches on the steel plate surface should be avoided to prevent the destruction of the passivation film on the surface, resulting in the reduction of the stainless steel protection ability and affecting the service life. The cutting of the stainless steel inner lining should select a numerical control lathe. When manufacturing the stainless steel inner lining in blocks using advanced cutting processes, each block of the stainless steel inner lining is numbered. At the same time, grouting holes should be reserved according to the later grouting plan.

[0053] The steps for transporting the stainless steel pipe segments include: During the transportation of the stainless steel inner lining, the four sides and the arc-shaped convex areas should be wrapped to avoid direct contact with carbon steel materials. After being transported to the site, for the up and down transportation of the pipe segments in the well, it is planned to customize a 5T small gantry crane from a professional manufacturer to be used for hoisting out the broken DN3500 pipe, hoisting the DN1400 inner sleeve, temporary pump and temporary drainage, steel sealing door, stainless steel inner lining, etc.

[0054] Before installing the stainless steel inner lining, stud bolts are welded on the outside of the steel plate at the site and anchored with post-grouting behind the wall to enhance the integrity of the repaired structure. The stud bolts are short steel bars of HBB400 with a length of 5cm, and no less than 6 stud bolts are arranged on each stainless steel pipe segment. The 4 inner linings of each ring are spliced and installed in the order from bottom to top according to the numbers during processing. The pipe segments between two rings are arranged staggeredly. The steps for the stainless steel paving and welding include:

[0055] (1) Refer to Figure 2 , the 4 steel plate inner linings M are stacked at the preset installation position of the pipeline. The pipeline inner lining repair device is moved to the position of the steel pipe inner lining, and one of the hoists of the pipeline inner lining repair device is used to pull up the topmost steel plate to one side. In this embodiment, in Figure 2 , the topmost steel plate is pulled to the left.

[0056] (2) Refer to Figure 3 , after the first steel plate M1 slides up along the longitudinal steel pipe to the corresponding position, the first and second steel plates M2 are spot-welded and fixed. Figure 3 The spot-welded fixed connection position P1 is shown in

[0057] (3) Refer to Figure 4, the first and second steel plates are pulled up as a whole to one side, and another hoist of the pipeline lining repair device ( Figure 4 the electric hoist on the right in

[0058] ) pulls the third steel plate in the reverse direction, that is, pulls the third steel plate to the right as shown by the arrow. Figure 5 (4) Refer to Figure 5 . After the third steel plate M3 is pulled to the designated position, it is spot-welded and fixed to the fourth steel plate M4.

[0059] The spot-welding fixed connection position P2 is given in Figure 6 . Figure 6 (5) Refer to

[0060] . After the third and fourth steel plates are fixed, they are pulled up as a whole to the other side, the angle is adjusted, and they are lapped with the left-side steel plate to form a complete ring, and are fixed by spot welding.

[0061] The pipeline lining repair method provided by the present invention further includes: the steps of installing a waterstop belt and post-grouting behind the wall. The steps of installing the waterstop belt include:

[0062] After adding a new stainless steel lining, a middle-buried steel-edge rubber waterstop belt is arranged at the corresponding joint of the lining steel ring every 6 m at the original pipe joint, and the middle rubber waterstop belt is made of chloroprene rubber;

[0063] There is a steel edge on each side of the rubber waterstop belt. After the installation of the previous ring of stainless steel segments is completed, one end of the steel edge of the waterstop belt is welded and fixed to the stud on the outside of the stainless steel lining, and the other end is welded to the steel bar on the inner wall of the original pipeline for fixation to ensure that the waterstop belt does not move during grouting;

[0064] After the stainless steel linings on both sides of the waterstop belt are installed, the stainless steel lining is disconnected by 30 mm at the joint, and the joint is sealed with a two-component polysulfide sealant. The surface of the deformation joint is clean, dry, dust-free and oil-free;

[0065] The steps of the post-grouting behind the wall include:

[0066] (1) Grouting pipe layout: After the stainless steel welding is completed, taking the section between two feeding wells as a grouting section, the grouting holes are distributed at 12 o'clock, 9 o'clock, 6 o'clock, and 3 o'clock for four-point grouting. The grouting holes are prefabricated in advance according to the segment position number during the segment processing. Before grouting in each section, high-pressure clear water should be injected into the void behind the wall through the high-position grouting hole at 12 o'clock to clean the void behind the wall until the flushing water flowing out of the low-position grouting hole is clear water before subsequent grouting can be carried out;

[0067] (2) Full-height support: The support adopts full-height steel pipe support. Three horizontal braces and three vertical braces are set in one section, with a spacing of 80 cm along the length of the pipeline. The construction time is 8 hours for erecting the full-height steel pipe support and 8 hours for dismantling the full-height steel pipe support;

[0068] (3) Mortar mixing: chlorate cement is used as the main gelling material in mortar;

[0069] (4) Grouting: a. The grouting sequence is to grout at 6 o'clock first, then 9 o'clock and 3 o'clock, and then stop grouting; b. Close the grouting hole at 6 o'clock, and then grout from the grouting holes at 9 o'clock and 3 o'clock until 12 o'clock, and then stop grouting; c. During grouting, mortar is poured on both sides at the same time to ensure that the pressure on both sides is the same, and the stainless steel side plate is knocked with a rubber hammer every 1m for 5 minutes, and the echo is listened to to check whether the slurry at that point is dense, and a special person is assigned to check whether the stainless steel plate is deformed and whether the mortar pouring amount is in compliance.

[0070] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. Pipeline lining repair device, the device includes annular steel pipes distributed front and back, and the annular steel pipes distributed front and back are connected by longitudinal steel pipes, characterized in that, The distance between the annular steel pipes distributed front and back is greater than the width of the steel plate lining. The outer layer of the longitudinal steel pipe is sleeved with a steel pipe with a slightly larger diameter. The annular steel pipes distributed front and back are provided with a cross-shaped steel pipe support. An equipment platform is arranged on the annular steel pipes distributed front and back. The equipment platform is located at the height position of 8 / 10 to 8.5 / 10 of the annular steel pipe. The equipment platform is provided with two electric hoists in a left-right manner. The annular steel pipe is provided with sliding rollers.

2. The pipeline lining repair device according to claim 1, characterized in that, This device is an integral modular structure.

3. The pipeline lining repair device according to claim 1, characterized in that, The inner diameter of the steel pipe sleeved on the outer layer of the longitudinal steel pipe is 2-5 mm larger than the outer diameter of the longitudinal steel pipe.

4. The pipeline lining repair device according to claim 1, characterized in that, The cross-section of the front and rear annular steel pipes of this device is square.

5. Pipeline lining repair method, characterized in that, This method includes the step of using the pipeline lining repair device as described in any one of claims 1-4 for lining repair.

6. The pipeline lining repair method according to claim 5, wherein the steps of lining repair include: The steps of manufacturing stainless steel pipe segments, the steps of transporting stainless steel pipe segments, the steps of paving and welding stainless steel pipe segments, characterized in that the steps of stainless steel paving and welding include: (1) Stack the steel plate lining at the preset installation position of the pipeline. Move the pipeline lining repair device to the position of the steel pipe lining, and use one of the hoists of the pipeline lining repair device to pull up the topmost steel plate to one side; (2) After the first steel plate slides up along the longitudinal steel pipe to the corresponding position, spot-weld the first and second steel plates to fix them; (3) Pull the first and second steel plates as a whole to one side, and use the other hoist of the pipeline lining repair device to pull the third steel plate in the opposite direction; (4) After the third steel plate is pulled to the designated position, spot-weld it to the fourth steel plate to fix it; (5) After the third and fourth steel plates are fixed, pull them as a whole to the other side, adjust the angle, and lap with the left-side steel plate to form a complete ring; (5) After one ring is completed, move to the next working surface through the bottom pulley of the pipeline lining repair device for welding the steel plates of the next ring.

7. The pipeline lining repair method according to claim 6, characterized in that, It also includes: The step of installing the waterstop belt and the step of post-grouting behind the wall.

8. The pipeline lining repair method according to claim 6, wherein, The step of installing the waterstop belt includes: After adding the new stainless steel lining, every 6 m, a buried steel-side rubber waterstop belt is arranged at the ring joint of the inner lining steel ring corresponding to the original pipe joint. The middle rubber waterstop belt uses chloroprene rubber; There is a steel side on both sides of the rubber waterstop belt. After the installation of the previous ring of stainless steel pipe segments is completed, weld one end of the steel side of the waterstop belt to the stud on the outside of the stainless steel lining, and weld the other end to the steel bar on the inner wall of the original pipeline for fixation to ensure that the waterstop belt does not move during grouting; After the stainless steel linings on both sides of the waterstop belt are installed, the stainless steel lining is disconnected by 30 mm at the joint, and the joint is sealed with a two-component polysulfide sealant. The surface of the deformation joint is clean, dry, dust-free, and free of oil; The step of post-grouting behind the wall includes: (1) Layout of grouting pipes: After the stainless steel welding is completed, take the area between two feeding wells as a grouting section. The grouting holes are distributed at 12 o'clock, 9 o'clock, 6 o'clock, and 3 o'clock for four-point grouting. The grouting holes are prefabricated in advance according to the pipe segment position numbers during the processing of the pipe segments. Before grouting in each section, high-pressure clean water should be injected into the void behind the wall through the high-position grouting hole at 12 o'clock to wash the void behind the wall until the washing water flowing out of the low-position grouting hole is clean water before subsequent grouting can be carried out; (2) Full-height support: The support adopts full-height steel pipe support. Three horizontal braces and three vertical braces are set in one section, with a spacing of 80 cm along the length of the pipeline. The construction time is 8 hours for erecting the full-height steel pipe support and 8 hours for dismantling the full-height steel pipe support; (3) Mortar mixing: chlorate cement is used as the main gelling material in mortar; (4) Grouting: a. The grouting sequence is to grout at 6 o'clock first, then 9 o'clock and then 3 o'clock, and then stop grouting; b. Close the grouting hole at 6 o'clock, and then grout from the grouting holes at 9 o'clock and 3 o'clock until 12 o'clock, and then stop grouting; c. During grouting, mortar is poured on both sides at the same time to ensure that the pressure on both sides is the same, and the stainless steel side plate is knocked with a rubber hammer every 1m for 5 minutes, and the echo is listened to to check whether the slurry at that point is dense, and a special person is assigned to check whether the stainless steel plate is deformed and whether the mortar pouring amount is in compliance.

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