CN-122014951-A - Non-excavation pipeline joint repairing method for modularized pipeline rapid flexible joint

CN122014951ACN 122014951 ACN122014951 ACN 122014951ACN-122014951-A

Abstract

The invention provides a method for repairing a rapid flexible joint trenchless pipeline joint of a modularized pipeline, which is used for repairing defects of a glass reinforced plastic pipe continuous pipeline and comprises the steps of arranging a construction site; the method comprises the steps of carrying out safe treatment on a pipeline to be constructed, confirming a range to be repaired, confirming the number of repair channels in the range to be repaired, measuring the inner circumference and the crack width of the pipeline, preparing a modularized glass sand inclusion pipe flexible repair body according to the length, the inner diameter and the number of the pipeline to be repaired, conveying the modularized glass sand inclusion pipe flexible repair body to a repair point, and installing a stainless steel ring. The invention solves the problem that the conventional pipeline quick flexible joint technology only can repair the defect points in order to achieve the bearing capacity and the repair range, and the pipeline defects can be continuously repaired through the modularized rubber ring.

Inventors

YU HAIYANG
CHEN HUI
LIU KEFU
SHI CHEN
ZHU JUNYUAN
CHEN YIYUN
ZHANG XIAOHUI

Assignees

上海浦东供排水建设工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (6)

1. A method for repairing the non-excavation pipeline joint of the rapid flexible joint of a modularized pipeline is used for repairing the defects of a glass reinforced plastic pipe continuous pipeline, and is characterized by further comprising the following steps of arranging a construction site, safely processing the pipeline to be constructed, confirming the range to be repaired, confirming the number of repairing channels in the range to be repaired, measuring the inner circumference and the crack width of the pipeline, and further comprising the following steps: The modular glass sand inclusion tube flexible repairing body is prepared according to the length to be repaired, the inner diameter of a pipeline and the number, wherein the modular glass sand inclusion tube flexible repairing body is provided with a B-type overlapped inner expansion ring assembly formed by splicing two phases in a staggered manner, an A-type overlapped inner expansion ring unit formed by splicing the B-type overlapped inner expansion rings in a staggered manner and four stainless steel water stop ring units, two stainless steel water stop rings are distributed on the inner surface of the end part of the modular glass sand inclusion tube flexible repairing body, and the remaining two stainless steel water stop rings are distributed at the splicing position of the overlapped inner expansion rings in the modular glass sand inclusion tube flexible repairing body; Transporting the modularized glass sand inclusion tube flexible prosthesis to a repairing point; supporting the No.1 rubber ring in the modularized glass sand inclusion tube flexible prosthesis to enable the No.1 rubber ring to be attached to the tube wall; the stainless steel water stop ring is propped open along the flange opening on the outer side of the No. 1 rubber ring; The method comprises the steps of installing a stainless steel ring, namely, fully expanding the stainless steel water stop ring, installing a hydraulic tool when a gap between the end parts of the two stainless steel water stop rings is more than 20mm, then placing the hydraulic tool at an expanded port, installing a steel support on the hydraulic tool, supporting the top of the steel ring, knocking the stainless steel ring by using a tool hammer while pressurizing the hydraulic tool, horizontally contacting the hammer surface with the ring surface, uniformly distributing hammering points on the ring to enable the stainless steel ring to sink into a rubber ring groove, finally pressurizing to 0.4MPa, continuously hammering the stainless steel ring until a reading book of a hydraulic meter of the hydraulic tool does not drop any more, and selecting a proper metal inserting sheet to be inserted into an inserting sheet limiting groove according to the expanded distance; overlapping the joint groove of the No. 2 rubber ring at the bulge of the No. 1 rubber ring to prop up; A stainless steel water stop ring is arranged at the lap joint of the No. 1 rubber ring and the No. 2 rubber ring; Overlapping the No.3 rubber ring and the No.2 rubber ring according to the same steps, and installing the remaining two stainless steel water stop rings; and confirming the tightness at the air valve.
2. The method for repairing a rapid flexible joint of a modular pipeline trenchless pipeline joint according to claim 1 further comprising the step of pre-treating comprising polishing the pipeline and applying a food grade epoxy finish to the inner wall surface of the polished glass sand inclusion tube.
3. The method for repairing the rapid flexible joint of the trenchless pipeline joint of the modularized pipeline according to claim 1, wherein a square metal block-shaped fixing seat (8) is arranged at the top of the hydraulic expander of the hydraulic tool (5), and a radial supporting device (9) is vertically arranged on the metal square metal block-shaped fixing seat (8).
4. The method for repairing the quick and flexible joint of the trenchless pipeline joint of the modularized pipeline according to claim 1 is characterized in that an A-shaped overlapped inner expansion ring (1) of the A-shaped overlapped inner expansion ring unit is provided with an A-shaped overlapped inner expansion ring middle body (1 a), two ends of the A-shaped overlapped inner expansion ring middle body are symmetrically distributed with an A-shaped overlapped inner expansion ring first end (1-1) and an A-shaped overlapped inner expansion ring second end (1-2), the back of the A-shaped overlapped inner expansion ring first end (1-1) is provided with a first sinking concave part (1-1 a), the lower surface of the A-shaped overlapped inner expansion ring first end (1-1) is symmetrically provided with inclined table convex parts (1-1 b) respectively, three inclined table middle convex parts (1-1 c) are distributed in the middle of two inclined table convex parts (1-1 b) at equal intervals, and a U-shaped groove body is arranged between every two inclined table middle convex parts (1-1 c); The middle position of the middle body of the B-type overlapped inner expansion ring is provided with a C-type outer bulge, two ends of the middle body of the B-type overlapped inner expansion ring are a first end (2-1) of the B-type overlapped inner expansion ring and a second end (2-2) of the B-type overlapped inner expansion ring, the structure of the first end (2-1) of the B-type overlapped inner expansion ring is identical to that of the first end (1-1) of the A-type overlapped inner expansion ring, the second end (2-2) of the B-type overlapped inner expansion ring is provided with a ridge with the thickness identical to that of the middle body of the B-type overlapped inner expansion ring, three rectangular bulges (2-2 a) are distributed on the surface of the ridge at equal intervals, and the intervals among the rectangular bulges are matched with the width of the middle bulge (1-1C) of the inclined platform.
5. A modular pipeline rapid flexible joint trenchless pipeline joint repairing method according to claim 3, characterized in that the main rod body of the radial supporting device (9) is provided with a first rod-shaped part with threads and a second rod-shaped part which is matched with the first rod-shaped part and internally provided with internal threads, the first rod-shaped part is vertically provided with a linear rotating rod, and the linear rotating rod drives the first rod-shaped part to realize the length adjustment of the whole main rod body in the inner barrel of the second rod-shaped part.
6. The method is characterized by comprising the steps of early investigation, preparation before installation, installation of an inner account ring, spreading of a rubber ring and pressure test; In the early investigation step, after the pipeline is out of service, the residual water in the pipeline is extracted cleanly, an exhaust system is installed, after the air quality in the pipeline is detected to reach the standard by utilizing an air detector, constructors are dispatched to enter the pipeline to perform on-site investigation on the pipeline interface to be repaired for numbering, the actual damage degree of the glass fiber reinforced plastic pipeline interface is known, each joint and annular crack needing to be repaired is confirmed, the width and depth of each joint crack are mastered, and when the joint of the pipeline needing to be repaired is confirmed, the condition, the corrosion degree, the pollution degree, solid and loose sediments, the wall thickness and the like of the joint are recorded, so that guiding reference is provided for pretreatment before installation; in the step of preparation before installation, before the inner expansion ring is installed, firstly, detecting that the air quality in a pipeline reaches the standard by using an air detector, and then sending constructors to remove sludge in the pipeline after the pipeline is taken down; In the step of installing the inner expansion ring, before the inner expansion ring is installed, a layer of food-grade epoxy resin finish paint is coated on the surface of the inner wall of the pipeline polishing, and the paint can play a role in rust prevention, corrosion prevention and protection on the inner wall of the glass fiber reinforced plastic pipe; In the step of spreading the rubber ring, a bottom air valve is tightly closed by a key, the rubber ring is tightly attached to a joint, a steel sheet with the diameter of 14mm multiplied by 8mm multiplied by 2mm is taken to be padded on a groove at the bottom of the rubber ring, a stainless steel ring with the larger diameter is firstly installed, the stainless steel ring is generally placed at the groove position of the rubber ring, the steel ring is gradually spread until two interfaces at the bottom of the ring are gathered on a gasket, and then a wedge is sequentially driven into the bottom of the gathered stainless steel ring from small to large by a crow bar, so that the hydraulic jack is convenient to install; in the installation step, firstly, a hydraulic jack is placed at a port which is propped up by a wedge, the hydraulic jack starts to be pressed to 0.15Mpa, a stainless steel ring is slightly knocked by a hammer, the position is adjusted to be positioned in a rubber ring groove, a steel support is arranged on the hydraulic jack to support the top of the steel ring, the hydraulic jack is continuously pressurized to 0.2Mpa, the stainless steel ring is knocked by the hammer at high force, the hammer surface is horizontally contacted with the ring surface, and the hammering points are uniformly distributed on the ring, so that the stainless steel ring is completely sunk into the rubber ring groove; Then pressurizing to 0.4Mpa, continuing to hammer the stainless steel ring under high force until the reading of the hydraulic gauge is not lowered, supporting the load by selecting proper stainless steel wedges empirically according to the distance of the stainless steel ring to be propped up, replacing the previously driven wedges, finally, releasing pressure, disassembling the steel support and the hydraulic jack, hammering the stainless steel wedges at the bottom by using a tool hammer, putting the stainless steel ring into a groove, completing the installation, and processing the stainless steel ring with smaller diameter as per the method, so as to form a permanent mechanical seal. In the step of pressure test, a miniature air compressor with a portable air tank is firstly prepared before pressure test, the volume of the air tank is 10L, the working pressure is 0.8Mpa, compressed air is filled in the air tank, during pressure test, an air valve on the rubber ring surface is firstly unscrewed, an air outlet hole of the portable air tank is connected to the air valve to start to inflate, the working pressure is maintained at 0.05Mpa, after inflation, leakage detection is started, soapy water is smeared at two ends of the rubber ring fastened by a steel ring, whether obvious continuous bubbles are generated or not is observed, the pressure value is not reduced, the pressure test is qualified, if yes, the installation and the pressure test are needed again, until the pressure test is qualified, finally, the air valve on the rubber ring surface is deflated, and the pressure test is finished by screwing the air valve by a key.

Description

Non-excavation pipeline joint repairing method for modularized pipeline rapid flexible joint Technical Field The invention relates to the field of repairing glass fiber reinforced plastic pipes in municipal pipelines, in particular to a method for repairing a rapid flexible joint trenchless pipeline joint of a modularized pipeline. Background In the raw water reinforcement engineering of a No. 20 new round station DN2000, the company discovers that a part of a repairing section of a J20 well is a glass fiber reinforced plastic pipe and cannot be repaired by using the traditional AMEX repairing technology, because the conventional pipeline rapid flexible joint technology only can carry out point repairing on a defect point in order to achieve the bearing capacity and the repairing range, and the prior repairing technology cannot be used in the project because the glass fiber reinforced plastic pipe in the repairing section of the project has continuous pipeline defects. Disclosure of Invention The invention aims to provide a method for repairing a rapid flexible joint trenchless pipeline joint of a modularized pipeline, which can repair and reinforce the defects of a continuous glass reinforced plastic pipe and simultaneously is rapid and convenient to construct. The invention provides a method for repairing a rapid flexible joint trenchless pipeline joint of a modularized pipeline, which is used for repairing defects of a glass reinforced plastic pipe continuous pipeline and is characterized by further comprising the steps of arranging a construction site, safely processing the pipeline to be constructed, confirming a range to be repaired, confirming the number of repaired pipelines in the range to be repaired, measuring the inner circumference and the crack width of the pipeline, and the method is also characterized by comprising the following steps: (1) Preparing a modularized glass sand inclusion tube flexible restoration according to the length to be restored, the inner diameter of the pipeline and the quantity; The modular glass sand inclusion tube flexible repairing body is provided with a B-type overlapped inner expansion ring assembly formed by splicing two phases in a staggered manner, an A-type overlapped inner expansion ring unit formed by splicing the B-type overlapped inner expansion rings in a staggered manner and four stainless steel water stop ring units, wherein two stainless steel water stop rings are distributed on the inner surface of the end part of the modular glass sand inclusion tube flexible repairing body, and the rest two stainless steel water stop rings are distributed at the splicing position of the overlapped inner expansion rings in the modular glass sand inclusion tube flexible repairing body; (2) Transporting the modularized glass sand inclusion tube flexible prosthesis to a repairing point; (3) Supporting the No. 1 rubber ring in the modularized glass sand inclusion tube flexible prosthesis to enable the No. 1 rubber ring to be attached to the tube wall; (4) The stainless steel water stop ring is propped open along the flange opening on the outer side of the No. 1 rubber ring; (5) The stainless steel ring mounting step comprises the following steps: 5.1, the whole stainless steel water stop ring is spread, and a hydraulic tool is installed under the condition that the gap between the two ends of the stainless steel water stop rings is more than 20 mm; 5.2, placing a hydraulic tool at the opening of the opening, installing a steel support on the hydraulic tool to support the top of the steel ring, knocking the stainless steel ring by using a hammer while pressurizing the hydraulic tool, horizontally contacting the hammer surface with the ring surface, and uniformly distributing hammering points on the ring to enable the stainless steel ring to sink into the rubber ring groove; 5.3 pressurizing to 0.4MPa, continuously hammering the stainless steel ring until the reading of the hydraulic meter of the hydraulic tool is not lowered, and selecting a proper metal insert to insert into the insert limiting groove according to the propped distance; (6) Overlapping the joint groove of the No. 2 rubber ring at the bulge of the No. 1 rubber ring to prop up; (7) A stainless steel water stop ring is arranged at the lap joint of the No. 1 rubber ring and the No. 2 rubber ring; (8) Overlapping the No. 3 rubber ring and the No.2 rubber ring according to the same steps, and installing the remaining two stainless steel water stop rings; (9) And confirming the tightness at the air valve. The method for repairing the modularized pipeline rapid flexible joint trenchless pipeline joint further comprises a pretreatment step, wherein the pretreatment step comprises the steps of polishing the pipeline and coating a layer of food-grade epoxy resin finish paint on the inner wall surface of the polished glass sand inclusion pipe. The method also comprises a pretreatment step, wherein the pretreatment st