CN113482127B - Method for repairing leakage of cement drain pipe by using PE 100-grade modified round-concave round vacuum lining pipe - Google Patents
Method for repairing leakage of cement drain pipe by using PE 100-grade modified round-concave round vacuum lining pipe Download PDFInfo
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- CN113482127B CN113482127B CN202110807924.2A CN202110807924A CN113482127B CN 113482127 B CN113482127 B CN 113482127B CN 202110807924 A CN202110807924 A CN 202110807924A CN 113482127 B CN113482127 B CN 113482127B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
- E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining
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Abstract
The invention relates to a method for repairing leakage of a cement drain pipe by using a PE 100-grade modified round-concave round vacuum lining pipe, which is used for pressing a PE100 lining pipe from a round pipe into a concave pipe and then inflating the concave pipe back into the round pipe, and belongs to the technical field of leakage repair of the cement drain pipe. According to the invention, the circular PE100 lining pipe is pressed into the concave pipe and then is wound and pre-shaped by using the industrial adhesive tape, and then two ends of the concave pipe are sealed and then are vacuumized and shaped, so that the lining pipe is ensured not to rebound even if the industrial adhesive tape outside the concave pipe is broken in the dragging process, and the method is particularly suitable for repairing the leakage of the ultra-long cement drain pipe; the problem of adopt among the current repair method to reduce interior bushing pipe diameter, interior bushing pipe can form the middle arc deformation that hangs down both ends height, leads to inside lining mouth of pipe and the cement drainage mouth of pipe to split, and adopt and become the spill to the extrusion of circular shape PE pipe after fixed with the winding of industrial adhesive tape, the easy fracture of industrial adhesive tape takes place to kick-back when dragging into in the cement drainage pipe, unsuitable well head distance exceeds 300 meters drainage pipe restoration is thoroughly solved.
Description
Technical Field
The invention relates to a repairing method for repairing the leakage of a cement drain pipe by pressing a PE100 lining pipe into a concave pipe from a circular pipe, then vacuumizing the inside of the concave pipe, then placing the vacuumized concave pipe into the cement pipe to be repaired, and then inflating the vacuumized concave pipe back to the circular pipe, belonging to the technical field of leakage repairing of the cement drain pipe.
Background
Along with the increase of the service life of the underground cement drainage pipe for urban drainage and sewage discharge, under the action of interference factors such as corrosion of underground water in the pipeline, pipeline running load, geographical settlement, underground engineering and the like, joint cracking or pipeline damage and leakage phenomena can be caused to the cement pipe, so that the conveying function of the cement drainage pipe is lost, and soil loss caused by leakage water can cause road surface collapse. At present, the commonly used repairing method for the damaged cement drain pipe is to spray repairing glue or weld a leakage point, so that the cement drain pipe with longer service life can only be maintained for a short time, and the problem of damaged leakage cannot be thoroughly solved.
In order to solve the problems, a new method is provided for maintaining the cement drain pipe in the prior art, namely a PE pipe with certain plasticity is lined in the cement drain pipe, and the service life of the cement drain pipe is prolonged and the problem of damage and leakage is solved by utilizing the plasticity and better corrosion resistance of the PE pipe; however, because the cement drain pipe to be maintained has a long distance and a large frictional resistance of the inner wall, and the circular PE pipe having an inner diameter similar to that of the cement drain pipe is difficult to be dragged into the cement drain pipe, when the conventional maintenance method for the lining PE pipe is implemented, the diameter of the lining PE pipe is usually made smaller than the inner diameter of the cement drain pipe or the circular PE pipe is extruded to be concave and then wound and fixed by an industrial tape, so that the inner diameter of the PE pipe is smaller than that of the cement drain pipe, and the PE pipe is convenient to be dragged into the cement drain pipe.
The diameter of the lining PE pipe is made small, so that the problem that the circular PE pipe is difficult to drag into a cement drain pipe is solved, but when the lining PE pipe is subjected to self weight, sewage in the pipe and the cement drain pipe are locally broken and collapsed, the lining PE pipe deforms with a lower middle part and two higher sides, so that the pipe opening of the lining PE pipe cannot be attached to the inner wall of the cement drain pipe, the sewage flows into a gap between the lining PE pipe and the cement drain pipe and is discharged from the damaged part of the cement drain pipe, and the problem of damage and leakage cannot be thoroughly solved; the method can reduce the diameter of the PE pipe to enable the PE pipe to be easily dragged into a cement drainage pipe, but the industrial adhesive tape on the outer surface of the concave PE pipe continuously rubs with the inner wall of the cement pipe to break in the dragging process, so that the concave PE pipe rebounds in the cement drainage pipe, particularly when the cement drainage pipe to be repaired is longer and the length of the cement drainage pipe exceeds more than 300 meters, the phenomenon of breakage of the industrial adhesive tape is more obvious, the construction progress is influenced after the concave PE pipe rebounds, and sometimes the concave PE pipe cannot be completely dragged in; the applicant company verifies that the implementation process of repairing the damaged and leaked cement pipes after the circular PE pipes are extruded into the concave shape is adopted, when the damaged and leaked cement pipes with the distance between two wellheads not exceeding 300 meters are repaired, the implementation process of the concave PE pipes wound by the industrial adhesive tapes is relatively smooth, when the distance between the two wellheads exceeds 300 meters and even reaches 400-500 meters, the repair is carried out by adopting the method of winding and fixing the concave PE pipes and the industrial adhesive tapes, and the repair cannot be carried out after the two wellheads enter a large half, so that a new repair method for repairing the leaked cement drainage pipes is necessary.
Disclosure of Invention
The invention aims to provide a method for repairing leakage of an overlong cement drain pipe, which comprises the steps of pressing a round PE100 lining pipe into a concave pipe, winding and presetting the concave pipe by using an industrial adhesive tape, sealing and vacuumizing two ends of the concave pipe, and finally setting, wherein even if the industrial adhesive tape outside the concave pipe is broken in the dragging process, the concave PE pipe does not rebound in the cement drain pipe, the concave PE pipe can be conveniently dragged into the underground cement pipe, and the method is particularly suitable for repairing leakage of the overlong cement drain pipe; after the traction is finished, the concave pipe is inflated to restore to a circular pipe, so that a small gap is ensured between the PE100 lining pipe and the cement drain pipe; the method thoroughly solves the problems that a larger gap is left between the lining pipe and the cement drain pipe in the existing repairing method, the lining pipe can form arc-shaped deformation with a lower middle part and two higher ends, and sewage flows into the space between the lining pipe and the cement drain pipe due to cracking of the opening of the lining pipe and the opening of the cement drain pipe; and the leakage of the cement drain pipe is repaired by the PE 100-grade modified round-concave round vacuum lining pipe, which solves the problems that the leakage of the cement drain pipe is repaired by the industrial adhesive tape winding and fixing method after the circular PE pipe is extruded to be concave, the industrial adhesive tape is easy to break and rebound when the PE concave pipe is dragged into the cement drain pipe, the repair of the long-distance cement drain pipe is not suitable, and the construction progress is influenced.
The invention realizes the purpose through the following technical scheme:
a method for repairing the leakage of a cement drain pipe by using a PE 100-grade modified round-concave round vacuum lining pipe comprises the following steps:
determining a repair area of a pipeline, surveying the inner diameter size, the length size and the site construction conditions of the pipeline to be repaired on site, evaluating and making a construction scheme, manufacturing a PE100 lining pipe with the diameter close to the inner diameter of the cement drainage pipe according to the surveyed size data, and transporting the PE100 lining pipe, construction equipment and auxiliary tools to a construction site;
secondly, plugging the upstream and downstream of the cement drain pipe to be repaired, stopping discharging sewage into the cement drain pipe to be repaired, and cleaning the cement drain pipe to be repaired by adopting a high-pressure water washing mode to discharge residual sewage in the cement drain pipe to be repaired, wherein no sediment is on the inner wall;
thirdly, carrying out hot-melt welding on the PE100 lining pipe and trimming the interface, wherein the PE100 lining pipe after the hot-melt welding is 4-6 m longer than the cement drain pipe to be repaired, conveying the PE100 lining pipe after the hot-melt welding to a lining pipe pressing device for pressing, paving an auxiliary pulley unit on the ground from the outlet end of the lining pipe pressing device to the pipe orifice of the cement drain pipe and the slope in front of the pipe orifice of the cement drain pipe, and then respectively conveying a light winch and a heavy winch to the two ends of the cement drain pipe to be repaired, wherein the lining pipe pressing device and the light winch are placed at the same end of the cement drain pipe to be repaired;
fourthly, pressing the circular PE100 lining pipe into a concave PE 100-grade modified pipe through lining pipe pressing equipment, winding an industrial adhesive tape on the surface of the concave PE 100-grade modified pipe, and temporarily shaping the concave PE 100-grade modified pipe;
the method is characterized in that:
fifthly, welding the tail end face of the pressed concave PE 100-grade modified pipe with a vacuumizing sealing plug, welding the head end face of the concave PE 100-grade modified pipe with a sealing dragging head, vacuumizing the interior of the concave PE 100-grade modified pipe through an external vacuumizing device of an exhaust pipe on the vacuumizing sealing plug, closing an exhaust valve on the exhaust pipe when the vacuum degree of the interior of the concave PE 100-grade modified pipe reaches 0.01-0.012MPa, further reducing the inner diameter of the concave PE 100-grade modified pipe and keeping the concave shape, and finishing manufacturing the PE 100-grade modified vacuum concave prefabricated pipe;
sixthly, installing a well wall roller mechanism on the well wall of the upstream dewatering well of the cement drainage pipe, installing a semicircular roller mechanism at the upstream inlet end of the cement drainage pipe, installing a pipe wall antifriction mechanism at the downstream outlet end of the cement drainage pipe, and installing a steel wire rope guide roller mechanism on the well wall opposite to the downstream outlet end of the cement drainage pipe, so that the influence of friction force is reduced in the process of drawing the PE 100-grade modified vacuum concave prefabricated pipe;
the steel wire rope of the light winch penetrates to the other end of the underground cement drain pipe at the placement position, the steel wire rope of the heavy winch at the other end is driven by the steel wire rope of the light winch to return to penetrate through the cement drain pipe to be repaired, the steel wire rope of the heavy winch is pulled to the position where the light winch is placed, the steel wire rope of the heavy winch is connected with a pulling hole in a pulling head of the PE 100-grade modified vacuum concave prefabricated pipe, the PE 100-grade modified vacuum concave prefabricated pipe is pulled to the pipe orifice of the cement drain pipe along an auxiliary pulley unit through the pulling of the heavy winch, and finally the PE 100-grade modified vacuum concave prefabricated pipe is pulled into the cement drain pipe to be repaired;
eighthly, after the PE 100-grade modified vacuum concave prefabricated pipe is dragged into the cement drainage pipe, two ends of the PE 100-grade modified vacuum concave prefabricated pipe are respectively 2-3 meters longer than the cement drainage pipe to be repaired and are tilted up to the ground; after the puller is disassembled, an air exhaust valve on an air exhaust pipe is opened, and then an air charging device is externally connected with the air exhaust pipe to charge air into the sealed PE 100-grade modified vacuum concave prefabricated pipe, so that the compressed concave PE 100-grade modified pipe breaks the industrial adhesive tape under the action of internal pressure and self elasticity and gradually recovers to a PE100 lining pipe with a circular section;
ninth, in the process of springback, installing silica gel washers at the positions where the two ends of the PE100 lining pipe are aligned with the ports of the cement drain pipe, wherein the thickness of each silica gel washer is larger than the gap between the PE100 lining pipe and the cement drain pipe, and when the PE100 lining pipe is restored to be in a circular section, the silica gel washers are squeezed between the PE100 lining pipe and the cement drain pipe to seal the gap between the PE100 lining pipe and the ports of the cement drain pipe;
tenth, after the PE100 lining pipe is completely restored to be circular in cross section, detaching a vacuumizing sealing plug, a connecting pipe and a sealing plate of a sealing dragging head, trimming two ports of the PE100 lining pipe, installing a circle supporting inner sleeve at the ports of the two ports of the PE100 lining pipe, and fixing the circle supporting inner sleeve, the PE100 lining pipe, a silica gel gasket and a cement drain pipe by fastening screws; and then, after the PE 100-grade modified lining pipe is installed and accepted through a water test, restoring the well mouths at two ends of the repaired underground cement drain pipe according to a conventional method, namely completing the leakage repairing work of the underground cement drain pipe.
The lining pipe pressing equipment comprises a frame, pressure plate groups, a pressure shaft mechanism, a guide compression rod group, a bundling mechanism and a supporting mechanism, wherein the supporting mechanism is arranged at the bottom of the frame at intervals, the pressure plate group is arranged at the upper part of the frame between the supporting mechanisms, the guide compression rod groups are arranged in the frame at two sides of the pressure plate group, the pressure shaft mechanisms are arranged at two ends of the frame, and the bundling mechanism is arranged at the outer side of the pressure shaft mechanism at the outlet end of the frame.
The vacuumizing sealing plug comprises a sleeve, a sealing disc, an assembling pipe and an exhaust pipe, wherein the sealing disc is manufactured in the sleeve, one side of the sealing disc is welded with the end face of a concave PE 100-grade modified pipe, an assembling boss is manufactured on the central position of the sealing disc, an assembling hole is manufactured on the assembling boss, the assembling pipe is fixedly installed in the assembling hole, a thread is arranged on the assembling pipe, the exhaust pipe is installed on the assembling pipe through the thread, the exhaust valve is arranged on the exhaust pipe, and a vacuum pressure gauge is arranged on the sealing disc on one side of the assembling boss.
The sealing puller comprises a connecting pipe, a sealing plate and a puller head, wherein the sealing plate is manufactured in the connecting pipe, and one side of the sealing plate is welded with the end surface of the concave PE 100-grade modified pipe; the outer end of the connecting pipe is provided with a fixing hole a, one end of the traction head is provided with a fixing hole b, and the connecting pipe and the traction head are fixedly connected through the fixing hole a and the fixing hole b through bolts.
The drawing head is conical, a section of horizontal annular structure is arranged at the port of the large-diameter end of the drawing head, the diameter of the horizontal annular structure is 2-5 mm larger than the diameter of the pipe opening of the connecting pipe, and the drawing head is sleeved on the outer surface of the connecting pipe through the horizontal annular structure; the small-diameter end of the traction head is a tip, and a traction hole is formed in the tip.
The auxiliary pulley unit consists of two supporting plates, a supporting shaft and a sliding sleeve, wherein the supporting plate at one side is higher than the supporting plate at the other side, a reinforcing plate is arranged between the bottoms of the two supporting plates, the supporting shaft is arranged between the upper parts of the two supporting plates, and the sliding sleeve is movably sleeved on the supporting shaft; every two auxiliary pulley units are combined in a pair and symmetrically arranged, and after the auxiliary pulley units are combined, the two support shafts and the two sliding sleeves are V-shaped.
The shaft wall roller mechanism consists of two vertical rods, a cross rod and a roller, wherein the two vertical rods are symmetrically arranged on two sides of the shaft wall close to the inlet end of the cement drain pipe of the upstream drainage well, the cross rod is arranged on the bottom of the shaft wall close to the inlet end of the cement drain pipe of the upstream drainage well, and the roller is movably sleeved on the two vertical rods and the cross rod.
The semicircular roller mechanism is composed of an arc-shaped fixing plate, an arc-shaped assembling plate, a roller shaft and a roller, wherein the arc-shaped fixing plate is fixedly arranged on the upper portion of the inlet end of the cement drain pipe, the arc-shaped assembling plate is vertically welded on the arc-shaped fixing plate, an assembling groove is formed in the arc-shaped assembling plate, and the roller is installed in the assembling groove through the roller shaft.
The pipe wall antifriction mechanism consists of arc plates, fixing plates, a fixing shaft and an arc roller, wherein the arc plates are fixedly arranged at the upper part of the outlet end of the cement drain pipe, the fixing plates are symmetrically arranged at two sides of the arc plates, the fixing shaft is fixedly arranged between the fixing plates, and the arc roller is movably sleeved on the fixing shaft.
The steel wire rope guide roller mechanism consists of a bottom plate, assembling plates, sleeve shafts and rolling sleeves, wherein the assembling plates are symmetrically arranged on two sides of the bottom plate, the sleeve shafts are fixedly arranged between the assembling plates, and the rolling sleeves are movably sleeved on the sleeve shafts; the steel wire rope guide roller mechanisms are at least three, two of the steel wire rope guide roller mechanisms are fixedly arranged on the opposite well wall at the downstream outlet end of the cement drainage pipe through the bottom plate, and the other steel wire rope guide roller mechanism is fixedly arranged on the top of the opposite well wall at the downstream outlet end of the cement drainage pipe through the bottom plate.
Compared with the prior art, the invention has the beneficial effects that:
the method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe comprises the steps of pressing the round PE100 lining pipe into a concave pipe, winding and presetting the concave pipe by using an industrial adhesive tape, sealing two ends of the concave pipe, vacuumizing and finally setting, wherein even if the industrial adhesive tape outside the concave pipe is broken in the dragging process, the concave PE pipe does not rebound in the cement drain pipe, the concave PE pipe can be conveniently dragged into the cement drain pipe, meanwhile, a well wall roller mechanism, a semicircular roller mechanism, a pipe wall anti-friction mechanism and a steel wire rope guide roller mechanism are arranged at an inlet and an outlet of the cement drain pipe and an upstream and downstream well mouth corresponding to the cement drain pipe, so that the friction force in the dragging process is reduced, the dragging is convenient and rapid, after the dragging is finished, the concave pipe is inflated to recover into the round pipe, and the gap between the lining pipe and the cement drain pipe is ensured to be small, the method is particularly suitable for repairing the leakage of the overlong cement drain pipe; the problem that a large gap is left between the lining pipe and the cement drain pipe due to the fact that the diameter of the lining pipe is reduced in the existing repairing method, the lining pipe can form arc-shaped deformation with a low middle part and high ends, and sewage flows into the space between the lining pipe and the cement drain pipe due to the fact that the opening of the lining pipe and the opening of the cement drain pipe crack is solved thoroughly; and the method of winding and fixing the PE pipe after the PE pipe is extruded into a concave shape by using the industrial adhesive tape is adopted, so that the industrial adhesive tape is easy to break and rebound when the PE concave pipe is dragged into the cement drainage pipe, and the problem that the long-distance cement drainage pipe with the distance between two wellheads exceeding 300 meters is repaired is not solved.
Drawings
FIG. 1 is a schematic front view of a lining pipe pressing apparatus according to the present invention;
fig. 2 is a schematic view showing the construction of a guide compression bar unit of the lining pipe pressing apparatus of the present invention;
FIG. 3 is a schematic structural view of a binding mechanism of the lining pipe pressing apparatus according to the present invention;
FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 1;
FIG. 5 is a schematic view of the pressing mechanism of the apparatus for pressing the lining pipe according to the present invention;
FIG. 6 is a schematic view of the PE100 grade modified vacuum concave prefabricated pipe of the present invention;
FIG. 7 is a schematic cross-sectional view of the sealing plug and the concave PE tube of the invention;
FIG. 8 is a schematic cross-sectional view of a sealing lug and a female PE tube of the invention;
FIG. 9 is a schematic view of the PE100 liner pipe, the silicone gasket, the inner sleeve for round support, and the cement drain pipe after installation;
FIG. 10 is a side view of the structure of FIG. 9;
FIG. 11 is a schematic structural view of the inner sleeve of the circle expanding device of the present invention;
fig. 12 is a schematic structural view of an auxiliary sheave unit of the present invention;
FIG. 13 is a schematic structural view of the sidewall roller mechanism of the present invention;
FIG. 14 is a schematic structural view of the half-round roller mechanism of the present invention;
FIG. 15 is a schematic structural view of a tube wall anti-friction mechanism of the present invention;
fig. 16 is a schematic structural view of a wire rope guide roller mechanism of the present invention;
FIG. 17 is a schematic view of the construction and use process of the present invention after the installation of each apparatus.
In the figure:
1. a frame; 101. hoisting a ring; 102. a switch group;
2. a pressure plate group; 201. pre-pressing a disc; 202. a starting platen; 203. a transition disk; 204. forming a disc;
3. a shaft pressing mechanism; 301. pressing the shaft; 302. a compression roller; 303. an adjusting plate; 304. a screw; 305. a mounting base; 306. a nut; 307. a limit gear; 308. a rack;
4. a bundling mechanism; 401. a driving wheel; 402. a driven wheel; 403. assembling a disc; 404. a bundling wheel; 405. a belt; 406. a drive motor;
5. guiding the compression rod set; 501. a double-ended screw; 502. a compression bar; 503. assembling a seat; 504. a nut; 505. a chain; 506. compressing the gear; 507. a positive thread; 508. reverse threads;
6. a support mechanism; 601. a supporting seat; 602. a support bar; 603. a roller;
7. PE100 grade modified vacuum concave prefabricated pipe; 701. a concave PE100 grade modified pipe; 702. industrial adhesive tapes;
8. vacuumizing and sealing the plug; 801. a sleeve; 802. sealing the disc; 803. assembling a boss; 804. assembling a pipe; 805. an exhaust pipe; 806. an air extraction valve; 807. a vacuum pressure gauge;
9. sealing the mop head; 901. a connecting pipe; 902. sealing plates; 903. a puller head; 904. a fixing hole a; 905. a fixing hole b; 906. drawing holes;
10. PE100 grade modified inner lining pipe; 1001. a cement drain pipe; 1002. a PE100 liner pipe; 1003. a silica gel gasket; 1004. supporting a round inner sleeve; 1005. fastening screws; 1006. a conical surface;
11. an auxiliary pulley unit: 1101. a support plate; 1102. a support shaft; 1103. a reinforcing plate; 1104. a sliding sleeve;
12. a well wall roller mechanism; 1201. a vertical rod; 1202. a cross bar; 1203. a rolling cylinder;
13. a semi-circular roller mechanism; 1301. an arc-shaped fixing plate; 1302. an arc-shaped assembly plate; 1303. a roller shaft; 1304. a roller;
14. a pipe wall anti-friction mechanism; 1401. a circular arc plate; 1402. a fixing plate; 1403. a fixed shaft; 1404. an arc-shaped roller;
15. a wire rope guide roller mechanism; 1501. a base plate; 1502. assembling a plate; 1503. a quill; 1504. a rolling sleeve.
Detailed Description
The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe comprises the following steps:
the method comprises the steps of firstly, determining a repair area of the pipeline, surveying the inner diameter size, the length size and the site construction condition of the pipeline to be repaired on site, evaluating and making a construction scheme, manufacturing a PE100 lining pipe 1002 with the diameter close to the inner diameter of a cement drain pipe 1001 according to surveyed size data, and transporting the PE100 lining pipe 1002, construction equipment and auxiliary tools to a construction site.
And secondly, plugging the upstream and the downstream of the cement drain pipe 1001 to be repaired, stopping discharging sewage into the cement drain pipe 1001 to be repaired, and cleaning the cement drain pipe 1001 to be repaired by adopting a high-pressure water washing mode to discharge residual sewage in the cement drain pipe 1001 to be repaired without sediments on the inner wall.
Thirdly, performing hot-melt welding on the PE100 lining pipe 1002 and trimming the interface, wherein the PE100 lining pipe 1002 after the hot-melt welding is 4-6 m longer than the cement drain pipe 1001 to be repaired, conveying the PE100 lining pipe 1002 after the hot-melt welding to lining pipe pressing equipment for pressing, meanwhile, paving auxiliary pulley units 11 on the ground at the pipe orifice of the cement drain pipe from the outlet end of the lining pipe pressing equipment to the pipe orifice of the cement drain pipe and a slope in front of the pipe orifice of the cement drain pipe, and respectively conveying a light winch (the light winch is JMT 5) and a heavy winch (the heavy winch is JMT 40) to two ends of the cement drain pipe 1001 to be repaired, wherein the lining pipe pressing equipment and the light winch are placed at the same end of the cement drain pipe 1001 to be repaired;
the lining pipe pressing equipment comprises a rack 1, pressing disc groups 2, pressing shaft mechanisms 3, guiding compression rod groups 5, bundling mechanisms 4 and supporting mechanisms 6, wherein the supporting mechanisms 6 are arranged at intervals at the bottom of the rack 1, the pressing disc groups 2 are arranged at the upper part of the rack between the supporting mechanisms 6, the guiding compression rod groups 5 are arranged in the rack 1 at two sides of the pressing disc groups 2, the pressing shaft mechanisms 3 are arranged at two ends of the rack 1, and the bundling mechanisms 4 are arranged at the outer sides of the pressing shaft mechanisms 3 at the outlet end of the rack 1;
the pressing disc group 2 is composed of a pre-pressing disc 201, a starting pressing disc 202, a transition disc 203 and a forming disc 204, the pre-pressing disc 201, the starting pressing disc 202, the transition disc 203 and the forming disc 204 are sequentially installed at the upper part of the frame 1 from left to right, the diameters of the pre-pressing disc 201, the starting pressing disc 202, the transition disc 203 and the forming disc 204 of the pressing disc group are sequentially increased from left to right, and the pressing disc group is fixed on the frame 1 through a disc shaft and a bearing and can freely rotate on the frame 1;
the two shaft pressing mechanisms 3 are respectively installed at an inlet and an outlet at the left end and the right end of the rack 1, each shaft pressing mechanism is composed of a pressing shaft 301, an adjusting plate 303, a screw 304, an installation seat 305, a screw cap 306, a limiting gear 307 and a rack 308, the pressing shaft 301 is horizontally arranged, the limiting gears 307 are respectively and fixedly installed at the two ends of the pressing shaft 301, and the limiting gears 307 are meshed with the racks 308 installed on the rack 1; two ends of a pressure shaft 301 are respectively arranged on an adjusting plate 303 and can rotate around the adjusting plate 303, and a pressure roller 302 capable of freely rotating is arranged on the pressure shaft 301; a screw 304 is fixedly connected below the adjusting plate 303, the lower end of the screw 304 is inserted into a through hole of an installation seat 305 on the frame 1, and the screw 304 is fixed through nuts 306 above and below the installation seat 305;
the bundling mechanism 4 comprises a driving wheel 401, a driven wheel 402, an assembly disc 403, bundling wheels 404, a belt 405 and a driving motor 406, the assembly disc 403 is fixedly arranged at an outlet at the right end of the frame 1, the driven wheel 402 is sleeved on the assembly disc 403, a plurality of bundling wheels 404 are arranged on the outer surface of one side of the driven wheel 402 through an assembly shaft, the driving motor 406 is fixedly arranged on the frame above the assembly disc 403 through a motor mounting seat, the driving wheel 401 is arranged on a transmission shaft of the driving motor 406, and the driving wheel 401 is connected with the driven wheel 402 through the belt 405;
the guide compression rod group 5 is composed of at least two guide compression rod units, each guide compression rod unit is composed of two double-headed screws 501, two compression rods 502, an assembly seat 503, a nut 504, a chain 505 and a compression gear 506, the two double-headed screws 501 are respectively and horizontally arranged at the upper part and the lower part in the rack 1 through the assembly seats 503, the compression gear 506 is respectively and fixedly arranged at one end of each of the two double-headed screws 501, and the chain 505 is arranged between the two compression gears 506; two ends of the double-threaded screw 501 are respectively provided with a positive thread 507 and a negative thread 508, a compression rod 502 is respectively arranged between the two ends of the two double-threaded screws 501, and the two ends of the compression rod 502 are in threaded connection with the positive thread 507 and the negative thread 508 of the double-threaded screw 501 through nuts 504;
the supporting mechanism 6 is composed of a plurality of supporting frames, each supporting frame is composed of a supporting seat 601, a supporting rod 602 and a roller 603, and the supporting frames are uniformly distributed between an inlet and an outlet at the bottom of the frame 1; the supporting seats 601 of each supporting frame are fixedly arranged at two sides and the middle of the bottom of the frame 1, the supporting seat 601 in the middle is lower than the supporting seats 601 at two sides, one end of each supporting rod 602 is fixedly connected with the supporting seats 601 at two sides, the other end of each supporting rod 602 is connected with the supporting seat 601 in the middle, the two supporting rods 602 are arranged in a V shape, and the supporting rods 602 are movably sleeved with rollers 603;
wherein, the outer side of the frame 1 is symmetrically provided with hoisting rings 101, the frame 1 at one side of the bundling mechanism 4 is provided with a switch group 102, and the switch group 102 is electrically connected with a driving motor 406 of the bundling mechanism 4; the circle supporting inner sleeve 1004 is made of a stainless steel sheet; the industrial tape 702 may also be replaced with a wire or other strapping.
Fourthly, pressing the circular PE100 lining pipe 1002 into a concave PE 100-grade modified pipe 701 through lining pipe pressing equipment, winding an industrial adhesive tape 702 on the surface of the concave PE 100-grade modified pipe 701, and temporarily shaping the concave PE 100-grade modified pipe 701;
when the PE100 lining pipe 1002 with the circular cross section passes through the pre-pressing disc 201, the top of the PE100 lining pipe 1002 with the circular cross section is pressed by the pre-pressing disc 201, so that the top of the PE100 lining pipe 1002 with the circular cross section is slightly deformed, then when the PE100 lining pipe 1002 passes through the shaft pressing mechanism 3 on one side of the pre-pressing disc 201, the top of the PE100 lining pipe 1002 with the smaller deformation is vertically pressed downwards, the cross section of the PE100 lining pipe 1002 is changed from a circle to an ellipse, the purpose is to increase the contact surface of the top end of the PE100 lining pipe 1002, and the pressing process of the initial pressing disc 202 and the transition disc 203 is smoother;
when the liner pipe 1002 of the PE100 moves to the positions of the start-pressure disc 202 and the transition disc 203 along with the movement of the liner pipe 1002 of the PE100, the top of the liner pipe 1002 of the PE100 is gradually largely deformed under the pressing action of the start-pressure disc 202 and the transition disc 203, the top of the liner pipe 1002 of the PE100 is recessed downward, and simultaneously, the guide compression rod group 5 compresses the pipe walls at the two sides of the liner pipe 1002 of the PE100 toward the middle, so that the inner diameter of the liner pipe 1002 of the PE100 is reduced as a whole.
Fifthly, the end face of the tail end of the concave PE 100-grade modified pipe 701 after being pressed is welded with a vacuumizing sealing plug 8, the end face of the head end of the concave PE 100-grade modified pipe 701 is welded with a sealing drag head 9, a vacuumizing device is externally connected with a vacuumizing pipe 805 on the vacuumizing sealing plug 8 to vacuumize the interior of the concave PE 100-grade modified pipe 701, when the vacuum degree of the interior of the concave PE 100-grade modified pipe 701 reaches 0.01-0.012MPa, an exhaust valve 806 on the vacuumizing pipe 805 is closed, the inner diameter of the concave PE 100-grade modified pipe 701 is further reduced and kept concave, and the PE 100-grade modified vacuum concave prefabricated pipe 7 is manufactured.
Sixthly, installing a well wall roller mechanism 12 on the well wall of the sewer well at the upstream of the cement drainage pipe 1001, installing a semicircular roller mechanism 13 at the inlet end at the upstream of the cement drainage pipe 1001, installing a pipe wall antifriction mechanism 14 at the outlet end at the downstream of the cement drainage pipe 1001, and installing a steel wire rope guide roller mechanism 15 on the opposite well wall at the outlet end at the downstream of the cement drainage pipe 1001, so that the influence of friction force is reduced in the process of drawing the PE 100-grade modified vacuum concave prefabricated pipe 7.
And seventhly, firstly, the steel wire rope of the light winch penetrates from the end of the underground cement drain pipe 1001 at the place where the steel wire rope is placed to the other end, then the steel wire rope of the heavy winch at the other end is driven by the steel wire rope of the light winch to return to penetrate through the cement drain pipe 1001 to be repaired, the steel wire rope of the heavy winch is pulled to the end where the light winch is placed, the steel wire rope of the heavy winch is connected with a pulling hole 906 in a pulling head 903 of the PE 100-grade modified vacuum concave prefabricated pipe 7, the PE 100-grade modified vacuum concave prefabricated pipe 7 is pulled to the pipe orifice of the cement drain pipe 1001 along an auxiliary pulley unit 11 through the pulling of the heavy winch, and finally the PE 100-grade modified vacuum concave prefabricated pipe 7 is pulled into the cement drain pipe 1001 to be repaired.
Eighthly, after the PE 100-grade modified vacuum concave prefabricated pipe 7 is dragged into the cement drain pipe 1001, two ends of the PE 100-grade modified vacuum concave prefabricated pipe 7 are respectively 2-3 meters longer than the cement drain pipe 1001 to be repaired and are tilted to the ground; after the pulling head 903 is removed, the air suction valve 806 on the air suction pipe 805 is opened, an air charging device is externally connected with the air suction pipe 805, and air is charged into the sealed PE 100-grade modified vacuum concave prefabricated pipe 7, so that the compressed concave PE 100-grade modified pipe 701 breaks the industrial adhesive tape 702 under the action of internal pressure and elasticity of the compressed concave PE 100-grade modified pipe 701 and gradually recovers to the PE100 lining pipe 1002 with the circular section.
And in the ninth step and the rebound process, installing a silicone gasket 1003 at the position where the two ends of the PE100 lining pipe 1002 are aligned with the port of the cement drain pipe 1001, wherein the thickness of the silicone gasket 1003 is larger than the gap between the PE100 lining pipe 1002 and the cement drain pipe 1001, and when the PE100 lining pipe 1002 is restored to be in a circular section, the silicone gasket 1003 is squeezed between the PE100 lining pipe 1002 and the cement drain pipe 1001 to seal the gap between the PE100 lining pipe 1002 and the port of the cement drain pipe 1001.
Tenth, after the PE100 lining pipe 1002 is completely restored to be circular in cross section, removing the connecting pipe 901 and the sealing plate 902 of the vacuumizing sealing plug 8 and the sealing drag head 9, trimming two ports of the PE100 lining pipe 1002, installing a circle supporting inner sleeve 1004 at two port parts of the PE100 lining pipe 1002, and fixing the circle supporting inner sleeve 1004, the PE100 lining pipe 1002, a silica gel gasket 1003 and a cement drain pipe 1001 by fastening screws 1005; the installation of the PE 100-grade modified lining pipe 10 is completed, and after the water passing test of the PE 100-grade modified lining pipe 10 is accepted, the well mouths at the two ends of the repaired underground cement drain pipe 1001 are restored according to a conventional method, that is, the leakage repairing work of the underground cement drain pipe 1001 is completed.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
The invention discloses a method for repairing leakage of a cement drain pipe by using a PE 100-grade modified round-concave round vacuum lining pipe, wherein the PE 100-grade modified round-concave round lining pipe is published in 18.04.2021 and is published in 01.05.2021 in the name of a name published in national non-plastic industry Limited company enterprise standard Q/HBJF 01-2021 of Hubei, and the detailed contents and record and publication conditions of the enterprise standard are referred to as an accessory I and an accessory II of other certification documents.
Claims (7)
1. A method for repairing the leakage of a cement drain pipe by using a PE 100-grade modified round-concave round vacuum lining pipe comprises the following steps:
firstly, determining a repair area of a pipeline, surveying the inner diameter size, the length size and the site construction conditions of the pipeline to be repaired on site, evaluating and making a construction scheme, manufacturing a PE100 lining pipe (1002) with the diameter close to the inner diameter of a cement drainage pipe (1001) according to survey size data, and transporting the PE100 lining pipe (1002), construction equipment and auxiliary tools to a construction site;
secondly, plugging the upstream and downstream of the cement drain pipe (1001) to be repaired, stopping discharging sewage into the cement drain pipe (1001) to be repaired, and cleaning the cement drain pipe (1001) to be repaired in a high-pressure water washing mode to discharge residual sewage in the cement drain pipe (1001) to be repaired without sediment on the inner wall;
thirdly, carrying out hot-melt welding on the PE100 lining pipe (1002) and trimming the interface, wherein the PE100 lining pipe (1002) after hot-melt welding is 4-6 m longer than the cement drain pipe (1001) to be repaired, conveying the PE100 lining pipe (1002) after hot-melt welding to lining pipe pressing equipment for pressing, meanwhile, paving an auxiliary pulley unit (11) on the ground at the pipe orifice of the cement drain pipe (1001) and the slope in front of the pipe orifice of the cement drain pipe (1001) from the outlet end of the lining pipe pressing equipment, and respectively conveying a light winch and a heavy winch to the two ends of the cement drain pipe (1001) to be repaired, wherein the lining pipe pressing equipment and the light winch are placed at the same end of the cement drain pipe (1001) to be repaired;
fourthly, pressing the circular PE100 lining pipe (1002) into a concave PE100 modified pipe (701) through lining pipe pressing equipment, winding an industrial adhesive tape (702) on the surface of the concave PE100 modified pipe (701), and temporarily shaping the concave PE100 modified pipe (701);
the method is characterized in that:
fifthly, welding the tail end face of the concave PE 100-grade modified pipe (701) after being pressed with a vacuumizing sealing plug (8), welding the head end face of the concave PE 100-grade modified pipe (701) with a sealing drag head (9), vacuumizing the interior of the concave PE 100-grade modified pipe (701) by externally connecting a vacuumizing device with a vacuumizing pipe (805) on the vacuumizing sealing plug (8), closing an air suction valve (806) on the vacuumizing pipe (805) when the vacuum degree of the interior of the concave PE 100-grade modified pipe (701) reaches 0.01-0.012MPa, further reducing the inner diameter of the concave PE 100-grade modified pipe (701) and keeping the concave shape, and finishing manufacturing the PE 100-grade modified vacuum concave prefabricated pipe (7);
sixthly, installing a well wall roller mechanism (12) on the well wall of the upstream sewer well of the cement drainage pipe (1001), installing a semicircular roller mechanism (13) at the inlet end of the upstream of the cement drainage pipe (1001), installing a pipe wall antifriction mechanism (14) at the outlet end of the downstream of the cement drainage pipe (1001), and installing a steel wire rope guide roller mechanism (15) on the opposite well wall of the downstream of the cement drainage pipe (1001), so that the influence of friction force is reduced in the process of drawing the PE 100-grade modified vacuum concave prefabricated pipe (7);
seventhly, firstly, a steel wire rope of a light winch penetrates through the underground cement drain pipe (1001) at the place where the light winch is placed to the other end, then the steel wire rope of a heavy winch at the other end is driven by the steel wire rope of the light winch to return to penetrate through the cement drain pipe (1001) to be repaired, the steel wire rope of the heavy winch is pulled to the place where the light winch is placed, the steel wire rope of the heavy winch is connected with a pulling hole (906) in a pulling head (903) of the PE 100-grade modified vacuum concave prefabricated pipe (7), the PE 100-grade modified vacuum concave prefabricated pipe (7) is pulled to the pipe orifice of the cement drain pipe (1001) along an auxiliary pulley unit (11) through the pulling of the heavy winch, and finally the PE 100-grade modified vacuum concave prefabricated pipe is pulled into the cement drain pipe (1001) to be repaired;
eighthly, after the PE 100-grade modified vacuum concave prefabricated pipe (7) is pulled into the cement drain pipe (1001), two ends of the PE 100-grade modified vacuum concave prefabricated pipe (7) are respectively 2-3 meters longer than the cement drain pipe (1001) to be repaired and upwarp to the ground; after the pulling head (903) is detached, an air suction valve (806) on an air suction pipe (805) is opened, an air charging device is externally connected with the air suction pipe (805), air is charged into the sealed PE 100-grade modified vacuum concave prefabricated pipe (7), and the compressed concave PE 100-grade modified pipe (701) breaks the industrial adhesive tape (702) under the action of internal pressure and self elasticity and is gradually restored to a PE100 lining pipe (1002) with a circular section;
in the ninth step and the rebound process, a silicone gasket (1003) is arranged at the position where two ends of the PE100 lining pipe (1002) are aligned with the port of the cement drain pipe (1001), the thickness of the silicone gasket (1003) is larger than the gap between the PE100 lining pipe (1002) and the cement drain pipe (1001), and when the PE100 lining pipe (1002) is restored to be in a circular section, the silicone gasket (1003) is squeezed between the PE100 lining pipe (1002) and the cement drain pipe (1001) to seal the gap between the PE100 lining pipe (1002) and the port of the cement drain pipe (1001);
tenth, after the PE100 lining pipe (1002) is completely restored to be circular in cross section, removing a vacuumizing sealing plug (8) and a connecting pipe (901) and a sealing plate (902) of a sealing drag head (9), trimming two ports of the PE100 lining pipe (1002), installing a circle supporting inner sleeve (1004) at two port openings of the PE100 lining pipe (1002), and fixing the circle supporting inner sleeve (1004), the PE100 lining pipe (1002), a silica gel gasket (1003) and a cement drain pipe (1001) by fastening screws (1005); the PE 100-grade modified lining pipe (10) is installed, after the PE 100-grade modified lining pipe (10) is tested and accepted through water, well mouths at two ends of the repaired underground cement drainage pipe (1001) are restored according to a conventional method, and then the leakage repairing work of the underground cement drainage pipe (1001) is completed;
the lining pipe pressing equipment consists of a rack (1), a pressure plate group (2), a pressure shaft mechanism (3), a guide compression rod group (5), a bundling mechanism (4) and a support mechanism (6), wherein the support mechanism (6) is arranged at the bottom of the rack (1) at intervals, the pressure plate group (2) is arranged at the upper part of the rack between the support mechanisms (6), the guide compression rod group (5) is arranged in the rack (1) at two sides of the pressure plate group (2), the pressure shaft mechanism (3) is arranged at two ends of the rack (1), and the bundling mechanism (4) is arranged at the outer side of the pressure shaft mechanism (3) at the outlet end of the rack (1);
the vacuumizing sealing plug (8) is composed of a sleeve (801), a sealing disc (802), an assembling pipe (804) and an exhaust pipe (805), the sealing disc (802) is manufactured in the sleeve (801), one side of the sealing disc (802) is welded with the end face of a concave PE 100-grade modified pipe (701), an assembling boss (803) is manufactured on the center position of the sealing disc (802), an assembling hole is manufactured in the assembling boss (803), an assembling pipe (804) is fixedly installed in the assembling hole, threads are arranged on the assembling pipe (804), the exhaust pipe (805) is installed on the assembling pipe (804) through the threads, an exhaust valve (806) is arranged on the exhaust pipe (805), and a vacuum pressure gauge (806) is arranged on the sealing disc (802) on one side of the assembling boss (807).
2. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the sealing drag head (9) consists of a connecting pipe (901), a sealing plate (902) and a drag head (903), wherein the sealing plate (902) is manufactured in the connecting pipe (901), and one side of the sealing plate (902) is welded with the end surface of the concave PE 100-grade modified pipe (701); a fixing hole a (904) is formed in the outer end of the connecting pipe (901), a fixing hole b (905) is formed in one end of the pulling head (903), and the connecting pipe (901) and the pulling head (903) are fixedly connected through the fixing hole a (904) and the fixing hole b (905) through bolts;
the drawing head (903) is conical, a section of horizontal annular structure is arranged at the port of the large-diameter end of the drawing head (903), the diameter of the horizontal annular structure is 2-5 mm larger than the diameter of the opening of the connecting pipe (901), the drawing head (903) is sleeved on the outer surface of the connecting pipe (901) through the horizontal annular structure, the small-diameter end of the drawing head (903) is a tip, and a drawing hole (906) is formed in the tip.
3. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the auxiliary pulley unit (11) is composed of two supporting plates (1101), a supporting shaft (1102) and a sliding sleeve (1104), wherein the supporting plate (1101) on one side is higher than the supporting plate (1101) on the other side, a reinforcing plate (1103) is arranged between the bottoms of the two supporting plates (1101), the supporting shaft (1102) is arranged between the upper parts of the two supporting plates (1101), and the sliding sleeve (1104) is movably sleeved on the supporting shaft (1102); every two auxiliary pulley units (11) are combined into a pair and are symmetrically arranged, and after the auxiliary pulley units are combined, the two support shafts (1102) and the two sliding sleeves (1104) are in a V shape.
4. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the well wall roller mechanism (12) consists of two vertical rods (1201), a cross rod (1202) and rollers (1203), wherein the two vertical rods (1201) are symmetrically arranged on two sides of the well wall close to the inlet end of the cement drainage pipe (1001) of the upstream drainage well, the cross rod (1202) is arranged at the bottom of the well wall close to the inlet end of the cement drainage pipe (1001) of the upstream drainage well, and the rollers (1203) are movably sleeved on the two vertical rods (1201) and the cross rod (1202).
5. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the semicircular roller mechanism (13) is composed of an arc fixing plate (1301), an arc assembly plate (1302), a roller shaft (1303) and a roller (1304), the arc fixing plate (1301) is fixedly arranged on the upper portion of the inlet end of a cement drain pipe (1001), the arc assembly plate (1302) is vertically welded on the arc fixing plate (1301), an assembly groove is formed in the arc assembly plate (1302), and the roller (1304) is installed in the assembly groove through the roller shaft (1303).
6. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the pipe wall antifriction mechanism (14) comprises an arc plate (1401), a fixed plate (1402), a fixed shaft (1403) and an arc roller (1404), wherein the arc plate (1401) is fixedly arranged at the upper part of the outlet end of the cement drain pipe (1001), the fixed plate (1402) is symmetrically arranged on two sides of the arc plate (1401), the fixed shaft (1403) is fixedly arranged between the fixed plates (1402), and the arc roller (1404) is movably sleeved on the fixed shaft (1403).
7. The method for repairing the leakage of the cement drain pipe by using the PE 100-grade modified round-concave round vacuum lining pipe as claimed in claim 1, wherein the method comprises the following steps: the steel wire rope guide roller mechanism (15) consists of a bottom plate (1501), assembling plates (1502), a sleeve shaft (1503) and a rolling sleeve (1504), wherein the assembling plates (1502) are symmetrically arranged on two sides of the bottom plate (1501), the sleeve shaft (1503) is fixedly arranged between the assembling plates (1502), and the rolling sleeve (1504) is movably sleeved on the sleeve shaft (1503); the number of the steel wire rope guide roller mechanisms (15) is at least three, two of the steel wire rope guide roller mechanisms are fixedly arranged on the opposite well wall of the downstream outlet end of the cement drain pipe (1001) through the bottom plate (1501), and the other steel wire rope guide roller mechanism is fixedly arranged on the top of the opposite well wall of the downstream outlet end of the cement drain pipe (1001) through the bottom plate (1501).
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| CN202110807924.2A CN113482127B (en) | 2021-07-16 | 2021-07-16 | Method for repairing leakage of cement drain pipe by using PE 100-grade modified round-concave round vacuum lining pipe |
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| CN202110807924.2A CN113482127B (en) | 2021-07-16 | 2021-07-16 | Method for repairing leakage of cement drain pipe by using PE 100-grade modified round-concave round vacuum lining pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2054808T5 (en) * | 1987-07-27 | 1999-12-16 | Pipe Liners Inc | A METHOD AND APPARATUS FOR THE PRODUCTION OF A DEFORMED TUBULAR CROSS SECTION TUBE. |
| AU2006252012A1 (en) * | 2006-12-12 | 2008-06-26 | Nuflow Tech (Asia Pacific) Pty Ltd | Pipe lining anchor apparatus and method |
| EP2722157A1 (en) * | 2012-10-18 | 2014-04-23 | Siegfried Schwert | Cladding tube, restored pressure pipe and method for restoring a pressure pipe |
| CN105128320B (en) * | 2015-07-30 | 2017-06-06 | 河南中拓石油工程技术股份有限公司 | A kind of pipe U-shaped folded deformation machines of portable PE |
| CN107940161A (en) * | 2017-10-09 | 2018-04-20 | 中国石油化工股份有限公司 | Pipe repairing method and pipeline for pipeline rehabilitation are met and discussed connection structure |
| CN108591670A (en) * | 2018-06-29 | 2018-09-28 | 江苏爱索新材料科技有限公司 | A kind of reparation of pipeline no-dig technique liner internal lining pipe fourth contact inflation sealing device and encapsulating method |
| CN108679358A (en) * | 2018-06-29 | 2018-10-19 | 江苏爱索新材料科技有限公司 | A kind of gas pipeline no-dig technique liner repairing construction technique |
| CN112359941B (en) * | 2020-10-11 | 2021-11-09 | 万维新材料科技(浙江)有限公司 | Integral ultraviolet curing repair process for sewage pipeline |
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