A pipeline flow restoration apparatus and method

Abstract

The application discloses a kind of pipeline continuous flow repair device and method, in work well, first in the case of water, bag type plugging head is fixed in upstream pipeline, then connect water passage section by section, water passage first section also uses bag type plugging head, to the downstream of repair pipeline;Then flush water in bag, drain in work well, create operation space, and the broken piece of corrugated plate is repaired.The application realizes the continuous flow repair of pipeline, avoids the high cost and the influence on normal use of pipeline caused by flow cut-off or temporary pump diversion;Bag type plugging head and water passage are connected by flange bolt, can be connected under water condition, convenient operation.The application is suitable for continuous flow repair construction of non-full pipe operation pipeline with cross-sectional diameter greater than 1.5m.

Description

Technical Field

[0001] This invention belongs to the field of municipal engineering technology, and specifically relates to a pipeline repair device and method that does not interrupt flow. Background Technology

[0002] Currently, there are numerous underground water pipe networks, which are prone to defects due to deformation and other factors. In the past, repairs to these defective pipes often involved interruption repair techniques or temporary pump rerouting, which were not only costly but also disrupted the current use of the pipeline.

[0003] In existing related patent technologies, such as the in-situ repair device without interrupting water supply disclosed in patent document (CN223375417U), the construction steps (steps S4-S8 in the specification) of this patent have serious timing conflicts and logical deadlocks, making "without interrupting water supply" and "in-situ curing" incompatible; the "expansion before pipe insertion" makes the operation extremely difficult and easily damages the inner lining; step S5 first inflates the resin hose (new pipe) to make it expand and fit against the inner wall of the old pipe; step S6 then drags the flexible central guide hose into the expanded resin hose. The inner wall of the resin hose (CIPP process) is usually impregnated with uncured resin, which has extremely high viscosity. After expansion and fitting, the internal space has been extremely compressed. Forcibly dragging the central guide hose at this time will result in great resistance, which can easily scratch the resin lining layer, leading to uneven resin distribution or damage, directly causing repair failure. The conventional process must first place the water bypass pipe and then insert the resin hose. Step S7: water is passed through the central guide hose; step S8: high-temperature steam is introduced to cure the resin hose. Resin hose curing typically requires high-temperature steam of 80℃-100℃ or higher. At this point, the central guide hose remains inside the resin hose. Ordinary flexible central guide hoses (such as PVC, rubber, or ordinary plastics) cannot withstand the high-temperature steam and will melt, deform, or even burst. Using high-temperature resistant materials (such as Teflon) is extremely expensive and reduces flexibility, making it difficult to drag within the pipe. If the central guide hose is removed before steam curing, upstream water will directly flow into the section of pipe to be repaired, washing away the resin hose or preventing it from curing, thus disrupting the "uninterrupted water supply" principle. If the central guide hose is left inside the resin hose for high-temperature curing, it will be permanently embedded in the new repaired pipe, severely reducing the effective cross-sectional area of ​​the drainage pipe and creating a risk of secondary blockage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a pipeline repair device and method that operates without interrupting flow. A working space is created by using end-to-end bag-type sealing heads in conjunction with a water-passing channel under water-bearing conditions. Within this working space, segmented duplex stainless steel corrugated plates are assembled at the defect in the pipeline to be repaired, with both circumferential and longitudinal seams connected by bolts. After installation, a manual grouting pump is used to inject grout into the pipe wall, completely filling and sealing the gap between the corrugated plates and the pipeline to be repaired.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A pipeline repair device without interrupting flow includes the pipeline to be repaired, a working well, a bladder-type plug, a water passage, and a corrugated plate reinforcement system. The bladder of the bladder-type plug is bolted to the flange joint of the water passage, and the bladder of the bladder-type plug is filled with water or gas. The corrugated plate reinforcement system adopts a segmented assembly structure, and its circumferential and longitudinal seams are all bolted together. The gap between the corrugated plate of the corrugated plate reinforcement system and the pipeline to be repaired is filled with a sealed chamber to complete the sealing.

[0007] Furthermore, the corrugated plate reinforcement system is made of duplex stainless steel.

[0008] Furthermore, the upstream bladder-type sealing head core tube is made of steel to improve its pressure resistance.

[0009] Furthermore, the downstream bladder-type plug core tube is made of PE material, which facilitates its inward extension; Furthermore, when the pipeline to be repaired is repaired in its entirety, the core tubes of both the upstream and downstream bag-type plugs are made of steel.

[0010] A method for repairing pipelines without interrupting flow, using the aforementioned pipeline repair device, comprises the following steps: S1. Under water-bearing conditions in the working well, fix the bag-type plug head in the upstream section of the pipeline to be repaired; S2. Starting from the upstream bag-type plug, connect the water passage section by section. The first section of the water passage is connected to the downstream bag-type plug, until the downstream bag-type plug is delivered to the predetermined position downstream of the defective section of the pipeline to be repaired. The water passage and the bag-type plug are connected by flange bolts. S3. Flush water into the bags of the upstream and downstream bag-type plugs to expand them and seal the inner wall of the pipeline to be repaired. Then drain the water from the working well to create working space. S4. Within the work space, the corrugated plates are assembled at the defects in the pipe to be repaired, with both circumferential and longitudinal seams connected by bolts to form a corrugated plate reinforcement system. S5. After the corrugated plate reinforcement system is installed, a manual grouting pump is used to perform back wall grouting to fill the gap between the corrugated plate and the inner wall of the pipe to be repaired. S6. After grouting is completed, release the water in the bladder, remove the water passage and bladder-type plug, and the repair is complete.

[0011] Furthermore, in step S1, the upstream bag-type plug is fastened to the inner wall of the upstream section of the pipeline to be repaired by bolts.

[0012] Furthermore, in step S2, the flange bolt connection is completed under water flow conditions.

[0013] Furthermore, the pipeline to be repaired is a non-full-load operating pipeline with a cross-sectional diameter greater than 1.5m.

[0014] The beneficial effects of this invention are: 1. It enables pipeline repair without interrupting flow, avoiding the high costs and impact on normal pipeline use caused by flow interruption or temporary pump rerouting.

[0015] 2. The bag-type sealing head is connected to the water passage using flange bolts, which can be completed under water flow conditions, making the operation convenient.

[0016] 3. The upstream steel core tube pouch-type plug has good pressure resistance, while the downstream PE core tube pouch-type plug is easy to extend inward, adapting to different working conditions.

[0017] 4. The corrugated plate reinforcement system is made of duplex stainless steel, which is high in strength and corrosion resistant; the segmented assembly and bolt connection method avoids the use of electricity and hot work, thus improving construction safety.

[0018] 5. This invention is applicable to the repair and construction of non-full-operation pipelines with a cross-sectional diameter greater than 1.5m, and has a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure for pipeline repair construction without interrupting flow according to the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and implementation process.

[0021] like Figure 1 As shown in the figure, the pipeline repair device provided in this embodiment of the invention includes a pipeline to be repaired (1), a working well (2), a bag-type plug (3), a water passage (4), and a corrugated plate reinforcement system (5).

[0022] The bladder of the bladder-type sealing head (3) is bolted to the flange joint, and the bladder can be filled with water or gas. The corrugated plate reinforcement system (5) is made of duplex stainless steel and adopts a segmented assembly structure. The circumferential and longitudinal seams are bolted together to avoid the use of electricity and hot work. After the corrugated plate is installed, a manual grouting pump is used to inject grout into the wall to fill the gap between the corrugated plate and the repaired pipe to complete the sealing.

[0023] The upstream bladder-type plug head 3 core tube is made of steel to improve its pressure resistance; the downstream core tube is made of PE to facilitate its inward extension; if the entire pipeline is being repaired and passes through the downstream working well, both ends of the bladder-type plug head 3 are made of steel core tube.

[0024] This invention also provides a pipeline repair method that does not interrupt flow. Using the aforementioned pipeline repair device, it has advantages such as low cost, no impact on current use, and safer repair operations. It is suitable for pipeline repair work on non-full-load operating pipelines with a cross-sectional diameter greater than 1.5m. The specific construction steps are as follows: I. Installation of upstream bag-type sealing head: Inside the working well 2, the bag-type plug 3 is first fixed to the upstream pipeline 1 to be repaired while the pipeline is still wet. Water or air can be pressurized inside the bag.

[0025] II. Installation of water passage sections connected one by one: Starting from the upstream bag-type plug 3, the water passage 4 is connected section by section. The first section of the water passage 4 also uses the bag-type plug 3, continuing downstream of the repaired pipeline to form a temporary water passage 4. The water passage 4 is connected to the plugs and to each section using flange bolts to ensure a secure seal. III. Creating a Workspace: Water is flushed into the bags of the upstream and downstream bag-type plugging heads 3, causing the bags to expand and press tightly against the inner wall of the pipeline 1 to be repaired, achieving upstream interception and downstream sealing. Then, the water in the working well 2 is drained, creating working space.

[0026] IV. Repair of damaged pipe sections: Within the workspace, the segmented duplex stainless steel corrugated plates are assembled at the defect of the pipe 1 to be repaired. Both the circumferential and longitudinal seams are connected by bolts to form a corrugated plate reinforcement system 5. After the corrugated plate reinforcement system (5) is installed, a manual grouting pump is used to perform wall grouting to fill the gap between the corrugated plate and the inner wall of the pipe 1 to be repaired.

[0027] V. Lifting of the blockade and site restoration: After the grouting material reaches its strength, drain the water from the bag-type plug head to release the blockage. Remove the water passage 4 and bag-type plug head 3 section by section, and clean the working well and pipeline of any construction debris. Restore normal water flow to the pipeline, inspect the repair quality, and complete the construction.

[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the concept and scope of the present invention. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A pipeline repair device that does not interrupt flow, characterized in that: The system includes the pipe to be repaired, a working well, a bag-type plug, a water passage, and a corrugated plate reinforcement system. The bag of the bag-type plug is bolted to the flange joint of the water passage, and the bag of the bag-type plug is filled with water or gas. The corrugated plate reinforcement system adopts a segmented assembly structure, and its circumferential and longitudinal seams are all bolted together. The gap between the corrugated plate of the corrugated plate reinforcement system and the pipe to be repaired is filled with a sealed chamber to complete the sealing.

2. The pipeline uninterrupted flow repair device according to claim 1, characterized in that: The corrugated plate reinforcement system is made of duplex stainless steel.

3. The pipeline uninterrupted flow repair device according to claim 1, characterized in that: The upstream bladder-type plug core tube is made of steel to improve its pressure resistance.

4. The pipeline uninterrupted flow repair device according to claim 3, characterized in that: The downstream bladder-type plug core tube is made of PE material, which facilitates its inward extension.

5. The pipeline uninterrupted flow repair device according to claim 1, characterized in that: When the pipeline to be repaired is repaired in its entirety, the core tubes of both the upstream and downstream bag-type plugs are made of steel.

6. A method for repairing a pipeline without interrupting flow, using the pipeline repair device according to any one of claims 1-5, characterized in that: The specific steps are as follows: S1. Under water-bearing conditions in the working well, fix the bag-type plug head in the upstream section of the pipeline to be repaired; S2. Starting from the upstream bag-type plug, connect the water passage section by section. The first section of the water passage is connected to the downstream bag-type plug, until the downstream bag-type plug is delivered to the predetermined position downstream of the defective section of the pipeline to be repaired. The water passage and the bag-type plug are connected by flange bolts. S3. Flush water into the bags of the upstream and downstream bag-type plugs to expand them and seal the inner wall of the pipeline to be repaired. Then drain the water from the working well to create working space. S4. Within the work space, the corrugated plates are assembled at the defects in the pipe to be repaired, with both circumferential and longitudinal seams connected by bolts to form a corrugated plate reinforcement system. S5. After the corrugated plate reinforcement system is installed, a manual grouting pump is used to perform back wall grouting to fill the gap between the corrugated plate and the inner wall of the pipe to be repaired. S6. After grouting is completed, release the water in the bladder, remove the water passage and bladder-type plug, and the repair is complete.

7. The method according to claim 6, characterized in that: In step S1, the upstream bag-type plug is fastened to the inner wall of the upstream section of the pipeline to be repaired by bolts.

8. The method according to claim 6, characterized in that: In step S2, the flange bolt connection is completed under water flow conditions.

9. The method according to claim 6, characterized in that, The pipeline to be repaired is a non-full-load operating pipeline with a cross-sectional diameter greater than 1.5m.

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