A pipeline repair method based on steam heating

Abstract

The present invention relates to a pipeline repair method based on steam heating, belonging to the field of plastic pipelines. It uses a liner heating device to heat and soften the liner. The liner heating device includes a closed bearing box, and an installation shaft is arranged in the bearing box along the front-rear direction. An insulating board is also arranged in the bearing box. The insulating board is located on the left side of the installation shaft, and the left side wall of the insulating board and the inner side wall of the bearing box enclose a closed heating area. A window penetrating the insulating board is also opened on the insulating board. A water storage tank is also arranged in the bearing box. The water storage tank is located on the right side of the installation shaft, and a heating component is arranged in the water storage tank. An air outlet is opened at the upper part of the water storage tank, and the air outlet communicates with the water storage tank and the heating area through a connecting pipe. A through groove communicating with the heating area is opened on the side wall of the bearing box. The present invention conducts traction on the liner while heating the liner for pipeline repair operations. Therefore, it can effectively improve the efficiency of pipeline repair.

Description

Technical Field

[0001] The present invention relates to the field of plastic pipes, and particularly to a pipe repair method based on steam heating. Background Art

[0002] Pipes buried underground are generally used for the transportation of various liquid and gaseous substances. However, during the long-term use of pipes, it is inevitable that pipe leakage occurs due to pipe rupture. Since the pipes are buried underground, if the ground is dug up for repair, it will affect people's work and life, and the workload is relatively large. Therefore, the FIPP thermoplastic forming repair method has emerged, which is used to repair pipes without excavation. It thermoplastically forms a softened liner inside the pipe to be repaired, so that the cooled and formed liner tightly adheres to the inner wall of the pipe to be repaired, achieving the purpose of repairing the pipe. However, before using the liner to repair the pipe, the liner wound on the reel needs to be heated as a whole first to make it all softened, and then the liner is pulled into the pipe. It is not possible to perform the pulling operation on the liner while heating. Therefore, the time spent on heating the liner is relatively long, which will lead to a relatively long time for the entire repair process and is not conducive to shortening the time required for the repair process. Based on this, the present application proposes a pipe repair method that can effectively shorten the time required for repairing pipes. Summary of the Invention

[0003] The present invention provides a pipe repair method based on steam heating, which is characterized in that a liner heating device is used to heat and soften the liner.

[0004] The liner heating device includes an enclosed bearing box. An installation shaft is arranged in the bearing box along the front-rear direction. An insulating board is also arranged in the bearing box. The insulating board is located on the left side of the installation shaft, and the left side wall of the insulating board and the inner side wall of the bearing box enclose a closed heating area. A window is also opened on the insulating board and penetrates through the insulating board. A water storage tank is also arranged in the bearing box. The water storage tank is located on the right side of the installation shaft, and a heating component is arranged in the water storage tank. An air outlet is opened at the upper part of the water storage tank. The air outlet communicates with the water storage tank and the heating area through a connecting pipe. Among them, a water inlet communicating with the water storage tank can also be arranged on the right side wall of the bearing box for adding clean water into the water storage tank. A through groove communicating with the heating area is opened on the side wall of the bearing box.

[0005] Among them, the process of using the liner heating device to heat and soften the liner includes the following steps:

[0006] A1. Install the spool wound with the liner on the installation shaft so that a part of the liner on the spool extends through the opening window into the heating area and the outer end of the liner is in the heating area; wherein, the outer end of the liner is the end of the liner wound on the spool that is exposed outside.

[0007] A2. The heating component heats the water in the water storage tank so that steam is generated in the water storage tank, and the steam enters the heating area through the connecting pipe to heat the liner located in the heating area.

[0008] A3. After the outermost layer of the liner in the heating area is softened, continuously pull out the outer end of the liner from the through groove to carry out the pipeline repair operation.

[0009] In the present invention, the liner is a pipeline made of thermoplastic material for repairing pipelines. After the liner is manufactured, it is flattened and wound on the spool; the liner heating device is used to heat the pre-manufactured liner wound on the spool to soften it so that the liner can be pulled into the pipeline to be repaired to repair the pipeline to be repaired.

[0010] In the present invention, after the spool wound with the liner is installed on the installation shaft, the outer end of the liner and the part near the outer end are in the heating area on the left side of the installation shaft. Therefore, the steam in the heating area will heat the outer end of the liner and the part near the outer end located in the heating area to soften it. Among them, after the liner located in the heating area is softened, the outer end of the liner can be pulled to make the spool rotate, and the outer end of the liner is pulled out of the through groove into the carrier box and then into the pipeline to be repaired. And during this process, since the liner outside the heating area will enter the heating area as the spool rotates, therefore, when pulling the liner in the present invention, the unheated and unsoftened liner can be pulled into the heating area for heating and softening, that is, it can be ensured that the liner pulled out of the carrier box has been heated and softened, which can ensure the smooth progress of the pipeline repair process.

[0011] It can be seen that the present invention can heat the liner while pulling the liner and pull the liner into the pipeline to be repaired. Therefore, compared with centralized heating of the liner, the present invention does not need to wait for all the liners to be heated and softened to start pulling the liner for pipeline repair operations. Therefore, the present invention can effectively shorten the time consumed in the entire pipeline repair process and improve the pipeline repair speed.

[0012] Among them, the present invention uses steam to heat the liner. After the steam contacts the liner and condenses into water, it will release heat. Compared with using hot air to heat the liner, it has a better heating effect and can effectively improve the softening speed of the liner. In addition, since the heat insulation board can confine the steam in the heating area, the present invention can make the steam more concentrated in the carrier box. That is, when the amount of steam generated in the water storage tank is certain, the present invention can make the steam generated in the water storage tank have a better heating effect on the liner, effectively increasing the softening speed of the liner. Therefore, the present invention can effectively improve the heating speed of the liner and ensure that the liner is in a softened state when it is pulled out of the liner wound on the coil pipe.

[0013] In addition, in the present invention, since the heating method is steam heating, the condensed water formed on the liner after the steam condenses can lubricate the liner, which can reduce the friction between the liner and the inner wall of the pipeline to be repaired when pulling the liner, making the pulling process of the liner more labor-saving and reducing the wear of the liner when moving in the pipeline to be repaired at the same time.

[0014] Furthermore, the pipeline repair operation process includes the following steps:

[0015] S1. Traction the outer end of the liner, and pull the outer end of the liner from the A-end opening of the pipeline to be repaired into the pipeline to be repaired until the outer end of the liner is pulled out from the B-end opening of the pipeline to be repaired. At this time, stop the heating treatment in the heating area and cut off the liner at the A-end opening of the pipeline to be repaired. Among them, a door structure can be opened on the left side wall of the carrier box to facilitate fixing the traction rope passing through the through groove to the outer end of the liner, so that the traction rope can gradually pull the liner out of the carrier box.

[0016] S2. Block both ends of the cut-off liner, fill the liner with heated gas, and keep the pressure in the liner at 0.03 - 0.06 MPa to make the liner adhere to the inner side wall of the pipeline to be repaired. Among them, the heated gas filled can be steam.

[0017] S3. After the liner is cooled and formed, remove the blocks at both ends of the liner and trim both ends of it to make its ports flat and flush with the A-end opening and B-end opening of the pipeline to be repaired. Among them, the A-end opening of the pipeline to be repaired is the opening closer to the carrier box among its two openings, and the B-end opening is the opening farther from the carrier box among the two openings of the pipeline to be repaired.

[0018] Further, the mounting shaft includes two fixed segments located at both ends thereof and a mounting segment located between the two fixed segments. The fixed segments are fixedly arranged on the inner side wall of the bearing box. The mounting segment is cylindrical, and connecting rods are fixedly arranged at both ends of the mounting segment. The connecting rods are coaxial with the mounting segment. The fixed segments are provided with mounting grooves for accommodating the connecting rods corresponding to the connecting rods, and the mounting grooves extend upward out of the fixed segments; a through opening is further formed on the top side wall of the bearing box, and a cover plate is movably arranged on the through opening.

[0019] In the present invention, by placing the connecting rods connected to the mounting segment in the mounting grooves on the fixed segments, the mounting segment can rotate relative to the two fixed segments. By mounting the reel on the mounting segment, the rotation of the reel in the bearing box can be realized, so that the reel can unwind the liner when pulling the liner; in addition, when mounting the reel, the mounting segment can be removed from the fixed segments, the mounting segment can be inserted into the reel outside the bearing box, and then the mounting segment with the reel mounted thereon can be mounted on the two fixed segments through the through opening, thus realizing the mounting of the reel.

[0020] Further, the heat insulation plate includes a first inclined plate and a second inclined plate arranged up and down. The lower end of the first inclined plate is inclined to the right, and the lower end of the first inclined plate abuts against the surface of the mounting shaft and is fixedly connected to the mounting shaft. The upper end of the second inclined plate is inclined to the right, and the upper end of the second inclined plate abuts against the surface of the mounting shaft and is fixedly connected to the mounting shaft; a first sub-opening window is arranged corresponding to the mounting segment at the lower end of the first inclined plate, the mounting segment is located inside the first sub-opening window, a second sub-opening window is arranged corresponding to the mounting segment at the upper end of the second inclined plate, the mounting segment is located in the second sub-opening window, and the second sub-opening window communicates with the first sub-opening window to form an opening; a first accommodation groove is formed at the lower end of the first sub-opening window, a first movable plate is movably inserted into the first accommodation groove, the upper end of the first movable plate is connected to the bottom of the first accommodation groove through a spring, a second accommodation groove is arranged at the lower end of the second sub-opening window, a second movable plate is movably inserted into the second accommodation groove, and the lower end of the second movable plate is connected to the bottom of the second accommodation groove through a spring.

[0021] In the present invention, the opening formed by the first sub-opening and the second sub-opening is for the liner wound on the reel to pass through. After the liner passes through the opening, the lower end of the first movable plate located in the first receiving groove and the upper end of the second movable plate located in the second receiving groove will abut against the liner, thereby playing a certain sealing role. In addition, the width of the opening is set according to the width of the liner wound on the reel. Preferably, when the liner passes through the opening, the distance between the liner and the edge of the opening is maintained at 10-20 mm, so as to reduce the amount of steam escaping from the gap between the liner and the opening, better confine the steam in the heating zone, and improve the heating effect of the steam on the liner in the heating zone.

[0022] Among them, since the first movable plate and the second movable plate are respectively connected to the bottom of the first receiving groove and the second receiving groove through springs, when the liner is gradually pulled out of the carrier box, the first movable plate and the second movable plate will always abut against the surface of the outermost liner under the action of the springs, maintaining their sealing effect.

[0023] Furthermore, a plurality of first sliding grooves are formed on the inner side wall of the first receiving groove, and first limiting blocks that are slidably embedded in the first sliding grooves are correspondingly arranged on the surface of the first movable plate; a plurality of second sliding grooves are formed on the inner side wall of the second receiving groove, and second limiting blocks that are slidably embedded in the second sliding grooves are correspondingly arranged on the surface of the second movable plate.

[0024] In the present invention, the first sliding groove is arranged along the inclination direction of the first inclined plate, which can be used to limit the movement direction of the first movable plate relative to the first inclined plate, so that the first movable plate can only reciprocate along the inclination direction of the first inclined plate, and further ensure that the first movable plate can always abut against the liner, forming a relatively sealed fitting structure with the liner. Similarly, the second sliding groove is also arranged along the inclination direction of the second inclined plate, which can make the second movable plate always abut against the liner, forming a relatively sealed fitting structure with the liner.

[0025] Furthermore, the through groove is located on the left side wall of the carrier box, and a rotating roller is rotatably arranged in the carrier box. The rotating roller is arranged along the front-rear direction, and the rotating roller is located on the left side of the mounting shaft. The horizontal height of the lower end of the rotating roller is lower than the horizontal height of the upper end of the through groove and higher than the horizontal height of the lower end of the through groove.

[0026] In the present invention, when the liner is pulled out of the carrier box, the liner is pulled from the lower end of the rotating roller to the left around the rotating roller and then horizontally pulled out from the through groove, which can limit the movement path of the liner in the carrier box and prevent the liner from being scratched on the edge of the through groove and causing damage to the liner.

[0027] Further, in step S1, it further includes the step of guiding the liner entering the pipeline to be repaired by a guiding mechanism. Among them, the guiding mechanism includes a bottom-hole guiding mechanism. The bottom-hole guiding mechanism includes a mounting rod. The mounting rod includes two threaded portions at both ends thereof and a mounting portion provided between the two threaded portions. A first guiding wheel is rotatably provided on the mounting portion. The surfaces of the two threaded portions are provided with external threads with opposite directions, and a support pipe is sleeved on each of the two threaded portions. An internal thread is provided on the inner side wall of the support pipe corresponding to the external thread on the threaded portion it sleeves.

[0028] In the present invention, by screwing the mounting portion relative to the support pipe, the overall length of the mounting pipe can be adjusted, that is, the two support pipes can be respectively abutted against the inner side wall of the manhole, so as to fix the mounting rod in the manhole. At this time, when the liner enters the pipeline to be repaired, the liner is made to bypass the first guiding wheel from the lower end of the first guiding wheel to the left, so as to fix the position of the liner entering the pipeline to be repaired, thereby avoiding the moving liner from rubbing against the edge of the A port of the pipeline to be repaired and preventing the liner from being worn.

[0029] Among them, the lower end of the first guiding wheel is preferably slightly higher than the axis of the pipeline to be repaired, preferably 30 - 50 mm higher than its axis.

[0030] Further, the guiding mechanism further includes a ground guiding mechanism. The ground guiding mechanism includes a mounting frame fixedly provided on the left side wall of the carrying box. A second guiding wheel is rotatably provided on the mounting frame, and the axial direction of the second guiding wheel is arranged along the front - rear direction.

[0031] In the present invention, after the liner is pulled out of the carrying box, the liner is made to bypass the second guiding wheel from the upper end of the second guiding wheel to the left and then pulled down to the first guiding wheel, so as to avoid the liner rubbing against the edge of the manhole during the downward pulling process and causing wear of the liner.

[0032] Further, first limiting plates are fixedly provided on both side surfaces of the first guiding wheel, and second limiting plates are fixedly provided on both side surfaces of the second guiding wheel.

[0033] In the present invention, the first limiting plates and the second limiting plates on both sides of the first guiding wheel and the second guiding wheel are used to limit the liner passing through the first guiding wheel and the second guiding wheel, preventing the liner from moving out of the first guiding wheel and the second guiding wheel.

[0034] The principle and effect of the present invention will be further described below in combination with the above - mentioned technical solutions and the drawings:

[0035] The present invention can heat the liner while pulling the liner, and pull the liner into the pipeline to be repaired. Therefore, compared with centralized heating of the liner, the present invention can start the pipeline repair operation by pulling the liner without waiting for all the liners to be heated and softened. Therefore, the present invention can effectively shorten the time consumed in the whole pipeline repair process and improve the pipeline repair speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the liner heating device according to an embodiment of the present invention;

[0037] Figure 2 is Figure 1 a partial enlarged view of;

[0038] Figure 3 is a schematic cross-sectional structural diagram of the liner heating device according to an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the use process of the liner heating device according to an embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of the mounting shaft according to an embodiment of the present invention;

[0041] Figure 6 is a schematic structural diagram of the bottom hole guiding mechanism according to an embodiment of the present invention.

[0042] DESCRIPTION OF THE REFERENCE NUMERALS:

[0043] 1 - bearing box, 11 - heating area, 12 - heat insulation board, 121 - first inclined plate, 1211 - first accommodating groove, 12111 - first sliding groove, 1212 - first movable plate, 12121 - first limiting block, 1213 - spring, 122 - second inclined plate, 123 - opening window, 13 - water storage tank, 131 - heating component, 14 - connecting pipe, 15 - cover plate, 16 - mounting shaft, 161 - fixed section, 162 - mounting section, 1621 - connecting rod, 17 - rotating roller, 181 - mounting rack, 182 - second guiding wheel, 19 - water inlet, 110 - through groove, 2 - liner, 3 - manhole, 4 - pipeline to be repaired, 51 - mounting part, 512 - threaded part, 52 - support pipe, 53 - first guiding wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] For the convenience of those skilled in the art to understand, the present invention will be further described in detail below with reference to the drawings and embodiments:

[0045] As Figures 1-6 , a pipeline repair method based on steam heating, characterized in that a liner heating device is used to heat and soften the liner 2;

[0046] The liner heating device includes a closed bearing box 1, and an installation shaft 16 is arranged in the bearing box 1 along the front-back direction; a heat insulation plate 12 is further arranged in the bearing box 1, the heat insulation plate 12 is located on the left side of the installation shaft 16, and a closed heating area 11 is formed by enclosing the left side wall of the heat insulation plate 12 and the inner side wall of the bearing box 1. A window 123 penetrating through the heat insulation plate 12 is also opened on the heat insulation plate 12; a water storage tank 13 is further arranged in the bearing box 1, the water storage tank 13 is located on the right side of the installation shaft 16, and a heating assembly 131 is arranged in the water storage tank 13. An air outlet is opened at the upper part of the water storage tank 13, and the air outlet communicates the water storage tank 13 and the heating area 11 through a connecting pipe 14. Among them, a water inlet 19 communicating with the water storage tank 13 can also be arranged on the right side wall of the bearing box 1 for adding clean water into the water storage tank 13; a through groove 110 communicating with the heating area 11 is opened on the side wall of the bearing box 1;

[0047] Among them, the process of using the liner heating device to heat and soften the liner 2 includes the following steps:

[0048] A1. Install the reel wound with the liner 2 on the installation shaft 16, so that a part of the liner 2 on the reel extends through the window 123 into the heating area 11, and the outer end of the liner 2 is located in the heating area 11; among them, the outer end of the liner 2 is the end of the liner 2 wound on the reel exposed outside.

[0049] A2. The heating assembly 131 heats the water in the water storage tank 13, so that the water in the water storage tank 13 generates steam, and the steam enters the heating area 11 through the connecting pipe 14 to heat the liner 2 located in the heating area 11.

[0050] A3. After the outermost layer of the part of the liner 2 located in the heating area 11 is softened, continuously pull out the outer end of the liner 2 from the through groove 110 to perform pipeline repair operations.

[0051] In the present invention, the liner 2 is a pipeline made of a thermoplastic material for repairing pipelines. After the liner 2 is manufactured, it is flattened and wound on a reel; the liner heating device is used to heat the pre-manufactured liner 2 wound on the reel to soften it, so that the liner 2 can be pulled into the pipeline 4 to be repaired to repair the pipeline 4 to be repaired.

[0052] In the present invention, after the reel wound with the liner tube 2 is installed on the installation shaft 16, the outer end and the part near the outer end of the liner tube 2 are located in the heating zone 11 on the left side of the installation shaft 16. Therefore, the steam in the heating zone 11 will heat the outer end and the part near the outer end of the liner tube 2 located in the heating zone 11 to soften it. Among them, after the liner tube 2 located in the heating zone 11 is softened, the outer end of the liner tube 2 can be pulled, so that the reel rotates, and the outer end of the liner tube 2 is pulled out of the carrier box 1 from the through groove 110 and pulled into the pipeline 4 to be repaired. And during this process, since the liner tube 2 located outside the heating zone 11 will enter the heating zone 11 as the reel rotates, therefore, when pulling the liner tube 2, the present invention can pull the unheated and unsoftened liner tube 2 into the heating zone 11 for heating and softening, that is, it can ensure that the liner tube 2 pulled out of the carrier box 1 is the liner tube 2 that has been heated and softened, and can ensure the smooth progress of the pipeline repair process.

[0053] It can be seen that the present invention can heat the liner tube 2 while pulling the liner tube 2 and pull the liner tube 2 into the pipeline 4 to be repaired. Therefore, compared with the centralized heating of the liner tube 2, the present invention does not need to wait for all the liner tubes 2 to be heated and softened before pulling the liner tube 2 to start the pipeline repair operation. Therefore, the present invention can effectively shorten the time consumed in the entire pipeline repair process and improve the pipeline repair speed.

[0054] Among them, the present invention uses steam to heat the liner tube 2. After the steam contacts the liner tube 2 and condenses into water, it will release heat. Compared with using hot air to heat the liner tube 2, it has a better heating effect and can effectively improve the softening speed of the liner tube 2; in addition, since the heat insulation board 12 can limit the steam in the heating zone 11, the present invention can make the steam more concentrated in the carrier box 1, that is, when the amount of steam generated by the water storage tank 13 is certain, the present invention can make the steam generated by the water storage tank 13 have a better heating effect on the liner tube 2 and can effectively increase the softening speed of the liner tube 2. Therefore, the present invention can effectively improve the heating speed of the liner tube 2 and ensure that the liner tube 2 is in a softened state when it is pulled away from the liner tube 2 wound on the coil.

[0055] In addition, in the present invention, since the heating method is steam heating, the condensed water formed by the condensation of the steam on the liner tube 2 after condensation can lubricate the liner tube 2, can reduce the friction between the liner tube 2 and the inner wall of the pipeline 4 to be repaired when pulling the liner tube 2, make the pulling process of the liner tube 2 more labor-saving, and at the same time can reduce the wear of the liner tube 2 when moving in the pipeline 4 to be repaired.

[0056] In one embodiment, the pipeline repair operation process includes the following steps:

[0057] S1. Pull the outer end of the liner tube 2, and draw the outer end of the liner tube 2 from the opening at end A of the pipeline to be repaired 4 into the pipeline to be repaired 4 until the outer end of the liner tube 2 is drawn out from the opening at end B of the pipeline to be repaired 4. At this time, stop the heating treatment in the heating zone 11, and cut off the liner tube 2 at the opening at end A of the pipeline to be repaired 4. Among them, a door structure can be opened on the left side wall of the carrying box 1 to facilitate fixing the towing rope passing through the through groove 110 to the outer end of the liner tube 2, so that the towing rope can gradually draw the liner tube 2 out of the carrying box 1.

[0058] S2. Block both ends of the cut-off liner tube 2, and fill the liner tube 2 with heated gas, and keep the pressure in the liner tube 2 at 0.03 - 0.06 MPa to make the liner tube 2 adhere to the inner side wall of the pipeline to be repaired 4. Among them, the heated gas filled can be steam.

[0059] S3. After the liner tube 2 is cooled and formed, remove the blocks at both ends of the liner tube 2, and trim both ends of it to make its ports flat and flush with the opening at end A and the opening at end B of the pipeline to be repaired 4. Among them, the opening at end A of the pipeline to be repaired 4 is the opening closer to the carrying box 1 among its two openings, and the opening at end B is the opening farther from the carrying box 1 among the two openings of the pipeline to be repaired 4.

[0060] In one embodiment, the mounting shaft 16 includes two fixed sections 161 at both ends and a mounting section 162 between the two fixed sections 161. The fixed sections 161 are fixedly arranged on the inner side wall of the carrying box 1. The mounting section 162 is cylindrical, and connecting rods 1621 are fixedly arranged at both ends of the mounting section 162. The connecting rods 1621 are coaxially arranged with the mounting section 162. The fixed sections 161 are provided with mounting grooves for accommodating the connecting rods 1621 corresponding to the connecting rods 1621, and the mounting grooves extend upward out of the fixed sections 161. A through opening is also opened on the top side wall of the carrying box 1, and a cover plate 15 is movably arranged on the through opening.

[0061] In this embodiment, by placing the connecting rod 1621 connected to the mounting section 162 in the mounting groove on the fixed section 161, the mounting section 162 can rotate relative to the two fixed sections 161. By mounting the reel on the mounting section 162, the rotation of the reel in the carrying box 1 can be realized, so that the reel can unwind the liner tube 2 when pulling the liner tube 2. In addition, when mounting the reel, the mounting section 162 can be removed from the fixed section 161, the mounting section 162 is inserted into the reel outside the carrying box 1, and then the mounting section 162 with the reel mounted is mounted on the two fixed sections 161 through the through opening, and the mounting of the reel can be realized.

[0062] In one embodiment, the heat insulation plate 12 includes a first inclined plate 121 and a second inclined plate 122 arranged vertically. The lower end of the first inclined plate 121 is inclined to the right, and the lower end of the first inclined plate 121 abuts against the surface of the mounting shaft 16 and is fixedly connected to the mounting shaft 16. The upper end of the second inclined plate 122 is inclined to the right, and the upper end of the second inclined plate 122 abuts against the surface of the mounting shaft 16 and is fixedly connected to the mounting shaft 16. A first sub-opening window is provided at the lower end of the first inclined plate 121 corresponding to the mounting section 162, and the mounting section 162 is located inside the first sub-opening window. A second sub-opening window is provided at the upper end of the second inclined plate 122 corresponding to the mounting section 162, and the mounting section 162 is located within the second sub-opening window. The second sub-opening window communicates with the first sub-opening window to form an opening window 123. A first receiving groove 1211 is formed at the lower end of the first sub-opening window, and a first movable plate 1212 is movably inserted into the first receiving groove 1211. The upper end of the first movable plate 1212 is connected to the bottom of the first receiving groove 1211 by a spring 1213. A second receiving groove is provided at the lower end of the second sub-opening window, and a second movable plate is movably inserted into the second receiving groove. The lower end of the second movable plate is connected to the bottom of the second receiving groove by a spring 1213.

[0063] In this embodiment, the opening window 123 formed by the first sub-opening window and the second sub-opening window is for the lining tube 2 wound on the reel to pass through. After the lining tube 2 passes through the opening window 123, the lower end of the first movable plate 1212 located in the first receiving groove 1211 and the upper end of the second movable plate located in the second receiving groove will abut against the lining tube 2, thereby playing a certain sealing role. In addition, the width of the opening window 123 is set according to the width of the lining tube 2 wound on the reel. Preferably, when the lining tube 2 passes through the opening window 123, the spacing between the lining tube 2 and the edge of the opening window 123 is maintained at 10 - 20 mm, so as to reduce the amount of steam escaping from the gap between the lining tube 2 and the opening window 123, better confine the steam within the heating zone 11, and improve the heating effect of the steam on the lining tube 2 within the heating zone 11.

[0064] Among them, since the first movable plate 1212 and the second movable plate are respectively connected to the bottoms of the first receiving groove 1211 and the second receiving groove by springs 1213, when the lining tube 2 is gradually pulled out of the carrying box 1, the first movable plate 1212 and the second movable plate will always abut tightly against the surface of the outermost lining tube 2 under the action of the springs 1213 to maintain their sealing effect.

[0065] In one embodiment, a plurality of first sliding grooves 12111 are formed in the inner sidewall of the first receiving groove 1211, and first limiting blocks 12121 that are slidably embedded in the first sliding grooves 12111 are provided on the surface of the first movable plate 1212 corresponding to the first sliding grooves 12111; a plurality of second sliding grooves are formed in the inner sidewall of the second receiving groove, and second limiting blocks that are slidably embedded in the second sliding grooves are provided on the surface of the second movable plate corresponding to the second sliding grooves.

[0066] In this embodiment, the first sliding groove 12111 is arranged along the inclination direction of the first inclined plate 121, and can be used to limit the moving direction of the first movable plate 1212 relative to the first inclined plate 121, so that the first movable plate 1212 can only reciprocate along the inclination direction of the first inclined plate 121. Furthermore, it can ensure that the first movable plate 1212 can always be tightly pressed against the liner 2, forming a relatively sealed fitting structure with the liner 2. Similarly, the second sliding groove is also arranged along the inclination direction of the second inclined plate 122, so that the second movable plate can always be tightly pressed against the liner 2, forming a relatively sealed fitting structure with the liner 2.

[0067] In one embodiment, the through groove 110 is located on the left sidewall of the carrying box 1, and a rotating roller 17 is rotatably arranged in the carrying box 1. The rotating roller 17 is arranged along the front-rear direction, and the rotating roller 17 is located on the left side of the mounting shaft 16. The horizontal height of the lower end of the rotating roller 17 is lower than the horizontal height of the upper end of the through groove 110 and higher than the horizontal height of the lower end of the through groove 110.

[0068] In this embodiment, when pulling out the liner 2 from the carrying box 1, the liner 2 is pulled around the lower end of the rotating roller 17 to the left and then horizontally pulled out from the through groove 110, which can limit the moving path of the liner 2 in the carrying box 1 and prevent the liner 2 from being scratched on the edge of the through groove 110 and being damaged.

[0069] In one embodiment, in step S1, it further includes the step of guiding the liner 2 entering the pipeline 4 to be repaired by using a guiding mechanism. Among them, the guiding mechanism includes a bottom-hole guiding mechanism. The bottom-hole guiding mechanism includes a mounting rod. The mounting rod includes two threaded portions 512 at both ends and a mounting portion 51 arranged between the two threaded portions 512. A first guiding wheel 53 is rotatably arranged on the mounting portion 51. Opposite external threads are provided on the surfaces of the two threaded portions 512, and support pipes 52 are sleeved on both of the threaded portions 512. Internal threads corresponding to the external threads on the threaded portions 512 sleeved thereon are provided on the inner sidewalls of the support pipes 52.

[0070] In this embodiment, by screwing the installation part 51 relative to the support pipe 52, the overall length of the installation pipe can be adjusted, that is, the two support pipes 52 can be respectively abutted against the inner side wall of the manhole 3 to fix the installation rod in the manhole 3. At this time, when the liner 2 enters the pipeline 4 to be repaired, the liner 2 can bypass the first guide wheel 53 from the lower end to the left, so as to fix the position of the liner 2 entering the pipeline 4 to be repaired, thereby avoiding the friction between the moving liner 2 and the edge of the A port of the pipeline 4 to be repaired and preventing the liner 2 from being worn.

[0071] Among them, the lower end of the first guide wheel 53 is preferably slightly higher than the axis of the pipeline 4 to be repaired, preferably 30-50 mm higher than its axis.

[0072] In one embodiment, the guiding mechanism further includes a ground guiding mechanism. The ground guiding mechanism includes a mounting bracket 181 fixedly arranged on the left side wall of the bearing box 1. A second guide wheel 182 is rotatably arranged on the mounting bracket 181, and the axial direction of the second guide wheel 182 is arranged along the front-rear direction.

[0073] In this embodiment, after the liner 2 is pulled out of the bearing box 1, the liner 2 bypasses the second guide wheel 182 from the upper end to the left, and then is pulled down to the first guide wheel 53, which can avoid the friction between the liner 2 and the edge of the manhole 3 during the downward pulling process, resulting in the wear of the liner 2.

[0074] In one embodiment, first limiting plates are fixedly arranged on both side surfaces of the first guide wheel 53, and second limiting plates are fixedly arranged on both side surfaces of the second guide wheel 182.

[0075] In this embodiment, the first limiting plates and the second limiting plates on both sides of the first guide wheel 53 and the second guide wheel 182 are used to limit the liner 2 passing through the first guide wheel 53 and the second guide wheel 182, and prevent the liner 2 from moving away from the first guide wheel 53 and the second guide wheel 182.

[0076] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A pipeline repair method based on steam heating, characterized in that, The liner is heated and softened using a liner heating device; The liner heating device includes a closed bearing box, and an installation shaft is arranged in the bearing box along the front-back direction; a heat insulation plate is also arranged in the bearing box, the heat insulation plate is located on the left side of the installation shaft, and a closed heating area is enclosed by the left side wall of the heat insulation plate and the inner side wall of the bearing box. A window is also opened on the heat insulation plate and penetrates through the heat insulation plate; a water storage tank is also arranged in the bearing box, the water storage tank is located on the right side of the installation shaft, a heating component is arranged in the water storage tank, an air outlet is opened at the upper part of the water storage tank, and the air outlet communicates with the water storage tank and the heating area through a connecting pipe; a through groove communicating with the heating area is opened on the side wall of the bearing box; The installation shaft includes two fixed sections at its two ends and an installation section between the two fixed sections. The fixed sections are fixedly arranged on the inner side wall of the bearing box. The installation section is cylindrical, and connecting rods are fixedly arranged at both ends of the installation section. The connecting rods are arranged coaxially with the installation section. The fixed sections are provided with installation grooves for accommodating the connecting rods corresponding to the connecting rods, and the installation grooves extend upward out of the fixed sections; The heat insulation plate includes a first inclined plate and a second inclined plate arranged up and down. The lower end of the first inclined plate is inclined to the right, and the lower end of the first inclined plate abuts against the surface of the installation shaft and is fixedly connected to the installation shaft. The upper end of the second inclined plate is inclined to the right, and the upper end of the second inclined plate abuts against the surface of the installation shaft and is fixedly connected to the installation shaft; a first sub-window is arranged at the lower end of the first inclined plate corresponding to the installation section, the installation section is located inside the first sub-window, a second sub-window is arranged at the upper end of the second inclined plate corresponding to the installation section, the installation section is located inside the second sub-window, and the second sub-window communicates with the first sub-window to form a window; a first accommodating groove is opened at the lower end of the first sub-window, a first movable plate is movably inserted in the first accommodating groove, the upper end of the first movable plate is connected to the bottom of the first accommodating groove through a spring, a second accommodating groove is arranged at the lower end of the second sub-window, a second movable plate is movably inserted in the second accommodating groove, and the lower end of the second movable plate is connected to the bottom of the second accommodating groove through a spring; Among them, the process of heating and softening the liner using the liner heating device includes the following steps: A1. Install the reel wound with the liner on the installation shaft, so that a part of the liner on the reel extends through the window into the heating area, and the outer end of the liner is located in the heating area; A2. The heating component heats the water in the water storage tank, so that the water in the water storage tank generates steam, and the steam enters the heating area through the connecting pipe to heat the liner located in the heating area; A3. After the outermost layer of the part of the liner located in the heating area is softened, continuously pull out the outer end of the liner from the through groove to perform pipeline repair operations.

2. The pipe repair method based on steam heating according to claim 1, wherein The process of the pipeline repair operation includes the following steps: S1. Pull the outer end of the liner tube and draw the outer end of the liner tube from the opening at end A of the pipeline to be repaired into the pipeline to be repaired until the outer end of the liner tube is drawn out from the opening at end B of the pipeline to be repaired. At this time, stop the heating treatment in the heating zone and cut off the liner tube at the opening at end A of the pipeline to be repaired. S2. Block both ends of the cut-off liner tube, fill the liner tube with heated gas, and keep the pressure in the liner tube at 0.03 - 0.06 MPa so that the liner tube adheres to the inner side wall of the pipeline to be repaired. S3. After the liner tube is cooled and formed, remove the blocks at both ends of the liner tube and trim both ends of it to make its ports flat and flush with the openings at end A and end B of the pipeline to be repaired.

3. The method for repairing a pipeline based on steam heating according to claim 1 or 2, characterized in that, A through opening is also formed on the top side wall of the carrying box, and a cover plate is movably arranged on the through opening.

4. The method for repairing a pipeline based on steam heating according to claim 3, wherein A plurality of first sliding grooves are formed on the inner side wall of the first accommodation groove. Corresponding to the first sliding grooves on the surface of the first movable plate, first limiting blocks are slidably embedded in the first sliding grooves; a plurality of second sliding grooves are formed on the inner side wall of the second accommodation groove. Corresponding to the second sliding grooves on the surface of the second movable plate, second limiting blocks are slidably embedded in the second sliding grooves.

5. The method for repairing a pipeline based on steam heating according to claim 3, wherein, The through groove is located on the left side wall of the carrying box, and a rotating roller is rotatably arranged in the carrying box. The rotating roller is arranged along the front - back direction, and the rotating roller is located on the left side of the installation shaft. The horizontal height of the lower end of the rotating roller is lower than the horizontal height of the upper end of the through groove and higher than the horizontal height of the lower end of the through groove.

6. The method for repairing a pipeline based on steam heating according to claim 2, wherein, In step S1, it further includes a step of guiding the liner tube entering the pipeline to be repaired by using a guiding mechanism. Among them, the guiding mechanism includes a bottom - well guiding mechanism. The bottom - well guiding mechanism includes an installation rod. The installation rod includes two threaded portions at its two ends and an installation portion arranged between the two threaded portions. A first guiding wheel is rotatably arranged on the installation portion. Opposite - direction external threads are arranged on the surfaces of the two threaded portions, and support tubes are sleeved on both threaded portions. Corresponding to the external threads on the threaded portions sleeved by them, internal threads are arranged on the inner side walls of the support tubes.

7. The method for repairing a pipeline based on steam heating according to claim 6, characterized in that, The guiding mechanism further includes a ground guiding mechanism. The ground guiding mechanism includes an installation frame fixedly arranged on the left side wall of the carrying box. A second guiding wheel is rotatably arranged on the installation frame. The axial direction of the second guiding wheel is along the front - back direction.

8. The method for repairing a pipeline based on steam heating according to claim 7, wherein, First limiting plates are fixedly arranged on both side surfaces of the first guiding wheel, and second limiting plates are fixedly arranged on both side surfaces of the second guiding wheel.

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