Construction method for replacing water supply pipeline without cutting off water

Abstract

The invention relates to the technical field of pipeline replacement construction, and provides a construction method for replacing a water supply pipeline without cutting off water, which comprises the following steps: S1, laying a temporary pipe on the ground beside a damaged pipe section of a water supply pipe; s2, a water supply connector pipe and a water interception connector pipe are welded and installed on the normal pipe sections at the two ends of the damaged pipe section of the water supply pipe; S3, the water supply connector pipe and the water interception connector pipe communicate with the water supply pipe; s4, the two ends of the temporary pipe are connected into water supply connector pipes at the two ends of the damaged pipe section of the water supply pipe correspondingly; s5, water intercepting devices are installed on the water intercepting connector pipes at the two ends of the damaged pipe section of the water supply pipe; s6, the damaged pipe section is cut off and transferred, and a new pipe section is reinstalled in situ; s7, water interception devices on the two water interception connector pipes are dismantled; and S8, dismantling the temporary pipe. The device has the effect of reducing the influence of water supply pipe section replacement on normal production and domestic water of residents.

Description

Technical Field

[0001] The present application relates to the field of pipeline replacement construction, and in particular to a construction method for replacing a water supply pipeline without stopping the water supply. Background Art

[0002] As the service life of water supply pipes in urban water supply networks increases, the inner and outer walls of the pipes are prone to corrosion and damage, which can easily cause leaks during daily use, affecting the normal water supply of the water supply network. In order to ensure the normal operation of the water supply network, it is necessary to regularly inspect the network pipes and replace the corroded and damaged water supply pipe sections in a timely manner.

[0003] The traditional construction plan for replacing a water supply pipe section is to lay a new pipe section on one side of the damaged section of the water supply pipe; after pressure testing, disinfecting and flushing the new pipe section, the water supply pipe is shut off and the new pipe section is connected to the normal section of the water supply pipe. At the same time, the damaged section of the water supply pipe is dismantled, transferred or grouted.

[0004] With regard to the above-mentioned related technologies, the construction plan for replacing the water supply pipe section requires stopping the water supply of the water supply pipe during the actual construction process, which may easily cause large-scale water outages in the surrounding areas, seriously affecting the normal production and life of residents; and the laying of the new pipe section requires re-excavation of the installation position; the overall excavation volume of the construction is large; therefore, there is room for improvement. Summary of the invention

[0005] In order to reduce the impact of the replacement of damaged sections of water supply pipes on the normal water supply of the water supply pipes, the present application provides a construction method for replacing water supply pipelines without stopping water supply.

[0006] This application provides a construction method for replacing a water supply pipeline without stopping water, which adopts the following technical solution: A construction method for replacing a water supply pipeline without stopping water supply, comprising the following steps: S1: Temporary pipe in place: lay temporary pipes on the ground next to the damaged section of the water supply pipe; S2: Interface pipe installation: Weld and install the water supply interface pipe and the water cut-off interface pipe on the normal pipe sections at both ends of the damaged pipe section of the water supply pipe. The water cut-off interface pipe is installed close to the damaged pipe section of the water supply pipe; S3: Pipeline drilling: drilling holes on the water supply interface pipe and the water cut-off interface pipe by using a drilling device, so that the water supply interface pipe and the water cut-off interface pipe are connected to the water supply pipe; S4: Temporary pipe connection construction: connect the two ends of the temporary pipe to the water supply interface pipes at both ends of the damaged pipe section of the water supply pipe, so that the damaged pipe section of the water supply pipe and the temporary pipe can supply water at the same time; S5: Damaged pipe section plugging treatment: Install water cut-off devices on the water cut-off interface pipes at both ends of the damaged pipe section of the water supply pipe, and use the water cut-off devices to cut off and plug the water at both ends of the damaged pipe section of the water supply pipe; S6: Pipe segment replacement: remove the damaged pipe segment and reinstall the new pipe segment in situ; S7: Connecting and supplying water to the new pipe section: Remove the water cut-off devices on the two water cut-off interface pipes, seal the water cut-off interface pipes, and supply water to the new pipe section from the water supply pipe; S8: Temporary pipe removal: Seal the water supply interface pipe and remove the temporary pipe, and the water supply pipe will supply water to the new pipe section alone.

[0007] By adopting the above technical scheme, temporary pipes are laid and connected with the water supply interface pipes at both ends of the damaged pipe section of the water supply pipe, so as to realize the dual-pipe water supply state of the water supply pipe and the temporary pipe, and then a water cut-off device is installed on the water cut-off interface pipes at both ends of the damaged pipe section of the water supply pipe, and the damaged pipe section of the water supply pipe is cut off and blocked by the water cut-off device, so as to restrict the water supply pipe from continuing to supply water to the damaged pipe section, so as to facilitate the cutting and removal of the damaged pipe section; after the damaged pipe section is removed and the new pipe section is reset and installed, the water cut-off device and the temporary pipe are removed, and the water supply interface pipe and the water cut-off interface pipe are blocked to restore the water supply to the new pipe section, and the water supply pipe does not need to be stopped during the whole process of pipe section replacement construction, which is conducive to maintaining the normal operation of the water supply pipe as a whole, and greatly reduces the impact of the pipe section replacement construction process on the normal living and production water use of surrounding residents; and compared with the traditional method of excavating and paving a new pipe section on one side of the damaged pipe section of the water supply pipe, the new pipe section of the present application is reinstalled in situ, which reduces the overall excavation amount during the construction process. At the same time, the temporary pipes can be reused after subsequent dismantling, which helps to reduce the overall construction cost.

[0008] Preferably, the water supply interface pipe and the water cut-off interface pipe are both coaxially connected with an interface flange at one end away from the water supply pipe; In step S2, after welding the water supply interface pipe and the water cut-off interface pipe to the normal pipe section of the water supply pipe, gate valves are installed on the interface flanges of the water supply interface pipe and the water cut-off interface pipe; In step S3: after the water supply interface pipe and the water cut-off interface pipe are perforated by the perforating device, the water supply interface pipe and the water cut-off interface pipe are respectively blocked by gate valves installed on the water supply interface pipe and the water cut-off interface pipe.

[0009] By adopting the above technical solution, by installing gate valves on the interface flanges of the water supply interface pipe and the water cutoff interface pipe, the gate valve can be used to control the opening and closing of the corresponding water supply interface pipe or the water cutoff interface pipe. In the subsequent construction process, after completing the construction steps such as opening the water supply pipe and dismantling the temporary pipe, the water supply interface pipe and the water cutoff interface pipe can be sealed in time by the gate valve to limit the water in the water supply pipe from flowing out from the water supply interface pipe and the water cutoff interface pipe.

[0010] Preferably, the water cut-off device comprises a first support tube, one end of which is open and the other end is closed; a first connecting flange is coaxially arranged at the open end of the first support tube, a blocking airbag is also arranged inside the first support tube, the blocking airbag is connected with an air pipe, and the air pipe is coaxially passed through the closed end of the first support tube; the first support tube is provided with a first lifting drive member corresponding to the air pipe, the first lifting drive member is drivingly connected to the air pipe, and is used to drive the air pipe to drive the blocking airbag to move radially along the first support tube; In step S2, the water supply pipe is cut off from water by a water cut-off device, and after the first connecting flange at the open end of the first support tube is connected to the gate valve end flange on the water cut-off interface pipe, the air pipe is driven by the first lifting drive member to drive the blocking airbag to move radially along the first support tube toward the water supply pipe until the blocking airbag passes through the incision between the gate valve and the water supply pipe and enters the water supply pipe; air is inflated into the blocking airbag through the air pipe to expand the blocking airbag and block the inner cavity of the water supply pipe.

[0011] By adopting the above technical solution, when blocking the water supply pipe, the first lifting drive member drives the air pipe to drive the blocking airbag to enter the inner cavity of the water supply pipe, and then the blocking airbag is inflated to expand the blocking airbag, so as to achieve blocking of the water supply pipe. When the water cut-off device is subsequently removed, the gas in the blocking airbag is released, and then the first lifting drive member drives the air pipe to drive the airbag to retract into the first support tube, so as to block the water cut-off interface pipe through the gate valve, thereby limiting the situation where the water in the water supply pipe overflows through the water cut-off interface pipe after the first support tube is subsequently removed from the gate valve.

[0012] Preferably, a protective tube is coaxially supported in the first support tube, one end of the protective tube is open and the other end is closed, the open end of the protective tube is close to the open end of the first support tube, the blocking airbag is located in the protective tube, and the trachea is coaxially penetrated through the closed end of the protective tube; the first support tube is provided with a second lifting drive member corresponding to the protective tube, the second lifting drive member is drivingly connected to the protective tube, and is used to drive the protective tube to move radially along the first support tube; In step S2, when the blocking airbag is driven by the first lifting drive member to move radially toward the water supply pipe along the first support tube, the protective tube is driven by the second lifting drive member to move synchronously with the blocking airbag; after the blocking airbag completely enters the inner cavity of the water supply pipe, the protective tube is driven by the second lifting drive member to retract into the first support tube.

[0013] By adopting the above technical solution, the cut of the water supply pipe is usually relatively rough and sharp. When the first lifting drive member drives the plugging airbag to directly pass through the cut of the water supply pipe and enter the inner cavity of the water supply pipe, the plugging airbag is affected by the impact of the water flow and is very likely to rub against or hang on the cut of the water supply pipe, causing the plugging airbag to be cut by the cut of the water supply pipe. By setting the protective tube and the second lifting drive member, the second lifting drive member drives the protective tube to move synchronously with the plugging airbag, so that the plugging airbag can always be located in the protective tube during the process of entering the inner cavity of the water supply pipe, and the protective tube is used to limit the contact between the plugging airbag and the cut of the water supply pipe, thereby effectively limiting the situation where the plugging airbag is cut by the cut of the water supply pipe.

[0014] Preferably, the method further comprises the following steps: S9: Install sealing plates on the interface flanges of the water supply interface pipe and the water cutoff interface pipe through the sealing installation device to seal the interface flanges; S10: Remove the gate valves on the water supply interface pipe and the water cutoff interface pipe; S11: Install the fixed flange cover at the end of the interface flange.

[0015] By adopting the above technical solution, the gate valve can be recycled and reused, which is beneficial to reducing the overall construction cost.

[0016] Preferably, threaded holes are provided around the outer circumference of the interface flange, and the threaded holes are connected to the inner circumference of the interface flange; studs are threadedly connected in the threaded holes; The specific steps of step S9 are as follows: S9.1: Install the seal mounting device at the gate valve end flange; S9.2: Open the gate valve and insert the sealing plate used to seal the interface flange into the inner periphery of the interface flange through the sealing installation device; S9.3: Tighten the studs on the outer periphery of the interface flange until the studs are in tight contact with the outer periphery of the sealing plate inside the interface flange to temporarily seal the interface flange with the sealing plate; S9.4: Remove the seal installation device on the gate valve.

[0017] By adopting the above technical solution, the sealing plate in the interface flange is fixed and limited by the studs pre-installed on the interface flange, so as to cooperate with the sealing plate to seal the interface flange, thereby limiting the water in the water supply pipe from flowing out of the water supply interface pipe and the water cut-off interface pipe, thereby facilitating the subsequent removal of the gate valves on the water supply interface pipe and the water cut-off interface pipe.

[0018] Preferably, the sealing member installation device comprises a second support tube, one end of the second support tube is open and the other end is closed; a second connecting flange is coaxially connected to the open end of the second support tube; a driving rod is coaxially supported in the second support tube; one end of the driving rod is passed through the closed end of the second support tube, and the other end of the driving rod is threadedly connected to the sealing plate; In step S9.2, the second connecting flange at the open end of the second support tube is connected to the flange end of the gate valve; after the gate valve is opened, the driving rod is moved radially along the second support tube toward the water supply pipe until the sealing plate moves to the inner periphery of the interface flange; In step S9.3, after the stud is tightly pressed against the outer periphery of the sealing plate, the driving rod is rotated to separate the driving rod from the sealing plate.

[0019] By adopting the above technical solution, by threading the end of the driving rod with the sealing plate, on the one hand, during the installation stage of the sealing plate, it is convenient for the operator to move the driving rod to insert the sealing plate into the connecting flange; on the other hand; after the sealing plate is subsequently limited and fixed by a number of studs at the connecting flange, the driving rod and the sealing plate can be separated by rotating the driving rod, which facilitates the subsequent removal of the sealing installation device from the gate valve.

[0020] Preferably, a support ring is coaxially connected to the inner circumference of the interface flange, and the support ring is used for the sealing plate to abut against; When the bottom of the sealing plate abuts against the supporting ring, the threaded hole is arranged opposite to the outer periphery of the sealing plate.

[0021] By adopting the above technical solution, the sealing plate can be supported and positioned by the support ring to limit the displacement of the support ring in the interface flange, so that the subsequent studs on the periphery of the interface flange can better press against the periphery of the sealing plate.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By connecting the two ends of the temporary pipe to the normal sections at both ends of the damaged section of the water supply pipe, so that the water supply pipe and the temporary pipe can supply water at the same time, the water supply pipe at both ends of the damaged section is cut off, and the new pipe section is reinstalled in situ to complete the replacement of the damaged section of the water supply pipe. During the construction period, the water supply pipe can maintain normal water supply through the temporary pipe, and there is no need to stop the water supply pipe, which effectively reduces the impact of the replacement of the water supply pipe section on the normal production and life of residents.

[0023] 2. When the first lifting drive member drives the air pipe to drive the blocking airbag into the inner cavity of the water supply pipe, the second lifting drive member drives the protective tube to move together with the blocking airbag, which is beneficial to prevent the blocking airbag from being cut or scratched by the water supply pipe when passing through the incision of the water supply pipe.

[0024] 3. The driving rod of the seal installation device is threadedly connected to the sealing plate. When installing the sealing plate, the sealing plate can be moved into the interface flange by moving the driving rod; subsequently, the studs on the outer periphery of the interface flange are screwed so that the studs are pressed tightly against the outer periphery of the sealing plate. The driving rod can be rotated to separate the driving rod from the sealing plate, thereby facilitating the removal of the seal installation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This application is used to illustrate the status of installing the water supply interface pipe and the water cut-off interface pipe.

[0026] Figure 2 This application is used to illustrate the state of installing a gate valve on a water supply interface pipe and a water cutoff interface pipe.

[0027] Figure 3 This is a schematic diagram used in this application to illustrate an electric pipeline pressure tapping machine.

[0028] Figure 4 This is a schematic diagram used in this application to illustrate the state of connecting temporary pipes.

[0029] Figure 5 This is a schematic diagram used in this application to illustrate the state of water cutoff treatment at both ends of a damaged pipe section.

[0030] Figure 6 This is a schematic diagram used in this application to illustrate the installation of a water cutoff device.

[0031] Figure 7 This is a schematic diagram used in this application to illustrate blocking a water supply pipe by a water cut-off device.

[0032] Figure 8 yes Figure 6 Enlarged schematic diagram of part A in the middle.

[0033] Fig. 9 This is a schematic diagram used in this application to illustrate the cutting and removal of a damaged pipe section.

[0034] Fig.10 This is a schematic diagram used in this application to illustrate the resetting and installation of a new pipe section.

[0035] Fig.11 This is a schematic diagram used in the present application to illustrate the installation of a sealing plate by a sealing installation device.

[0036] Fig.12 yes Fig.11 Enlarged schematic diagram of part B in the middle.

[0037] Fig.13 This is a schematic diagram used in this application to illustrate the installation of a flange cover on an interface flange.

[0038] Fig.14This application is a schematic diagram used to illustrate the water supply pipe after the new pipe section is replaced.

[0039] Description of reference numerals: 1. Water supply pipe; 10. Temporary pipe; 11. Water supply interface pipe; 12. Water cut-off interface pipe; 13. Gate valve; 14. Interface flange; 141. Threaded hole; 142. Stud; 143. Support ring; 15. Electric pipe pressure hole opening machine; 151. Frame; 152. Spindle; 155. Cutting tool; 153. Rotation drive mechanism; 154. Feed drive mechanism; 2. Water cut-off device; 21. First support tube; 211. First connecting flange; 20. Sealing airbag; 22. Air pipe; 23. First lifting cylinder; 24. Casing; 240. Water permeable hole; 241. Connecting rod; 25. Second lifting cylinder; 3. Sealing installation device; 30. Sealing plate; 31. Second support tube; 311. Second connecting flange; 32. Drive rod; 321. Holding handle; 4. Flange cover. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-13 This application is described in further detail.

[0041] The present application discloses a method for replacing a water supply pipeline without stopping the water supply, comprising the following steps: S1: Temporary pipe 10 is in place: refer to Figure 1 A temporary pipe 10 is laid on the ground of the damaged pipe section of the water supply pipe 1; the temporary pipe 10 adopts a self-anchored pipe, which is convenient for subsequent installation, and the subsequent removal is simple and convenient, and can be reused.

[0042] S2: Interface pipe installation: refer to Figure 1 and Figure 2 , the specific steps are as follows: S2.1: Weld and install the water supply interface pipe 11 and the water cut-off interface pipe 12 on the normal pipe sections at both ends of the damaged pipe section of the water supply pipe 1, and the water cut-off interface pipe 12 is arranged close to the damaged pipe section of the water supply pipe 1.

[0043] The ends of the water supply interface pipe 11 and the water cut-off interface pipe 12 away from the water supply pipe 1 are both coaxially connected with an interface flange 14 .

[0044] S2.3: Install gate valves 13 at the interface flanges 14 at the ends of the water supply interface pipe 11 and the water cutoff interface pipe 12.

[0045] S3: Pipe opening: refer to Figure 2 and Figure 3 The water supply pipe 1 is perforated by a perforating device on the water supply interface pipe 11 and the water cut-off interface pipe 12 so that the water supply interface pipe 11 and the water cut-off interface pipe 12 are connected to the water supply pipe 1 .

[0046] The hole-opening equipment adopts the existing electric pipe pressure hole-opening machine 15; the electric pipe pressure hole-opening machine 15 includes a frame 151, a spindle 152, a rotation drive mechanism 153 and a feed drive mechanism 154; a flange structure is provided at the end of the frame 151; the spindle 152 is installed in the frame 151, and a cutting tool 155 is connected to the end of the spindle 152; the rotation drive mechanism 153 is drivingly connected to the spindle 152, and is used to drive the spindle 152 to rotate; the feed drive mechanism 154 is drivingly connected to the spindle 152, and is used to drive the spindle 152 to feed along its own axial direction.

[0047] The specific steps of step S3 are as follows: S3.1: Install and fix the electric pipeline pressure tapping machine 15: Connect and fix the end flange structure of the frame 151 of the electric pipeline pressure tapping machine 15 to the end flange structure of the gate valve 13; S3.2: Open gate valve 13; S3.3: The rotation drive mechanism 153 and the feed drive mechanism 154 cooperate to drive the main shaft 152 to drive the cutting tool 155 to move toward the pipe body of the water supply pipe 1 to cut an opening on the pipe body of the water supply pipe 1; S3.4: The rotation drive mechanism 153 and the feed drive mechanism 154 cooperate to drive the spindle 152 to drive the cutting tool 155 to retract into the frame 151; S3.5: Close gate valve 13; S3.6: Remove the frame 151 of the electric pipeline pressure tapping machine 15 from the gate valve 13.

[0048] S4: Temporary pipe 10 access construction: refer to Figure 1 and Figure 4 , the specific steps are as follows: S4.1: Connect the two ends of the temporary pipe 10 to the gate valves 13 on the two water supply interface pipes 11 respectively; S4.2: Open the gate valve 13 on the water supply interface pipe 11, so that the water supply pipe 1 supplies water to the temporary pipe 10, thereby forming a dual-pipe water supply system for the damaged pipe section of the water supply pipe 1 and the temporary pipe 10; S4.3: Disconnect the branch pipe of the damaged section of the water supply pipe 1 from the user's water pipe, connect the temporary pipe 10 to the user's water pipe, and supply water to the user's water pipe through the temporary pipe 10.

[0049] S5: Damaged pipe section plugging treatment: refer to Figure 5 A water cut-off device 2 is installed on the water cut-off interface pipes 12 at both ends of the damaged pipe section of the water supply pipe 1, and the water cut-off device 2 is used to cut off and seal the two ends of the damaged pipe section of the water supply pipe 1.

[0050] Reference Figures 6 to 8The water cut-off device 2 includes a first support tube 21; one end of the first support tube 21 is open and the other end is closed; the open end of the first support tube 21 is coaxially connected with a first connecting flange 211. A blocking airbag 20 is arranged in the first support tube 21; the blocking airbag 20 is connected with an air pipe 22; the air pipe 22 is made of a metal pipe; one end of the air pipe 22 away from the blocking airbag 20 is coaxially penetrated through the closed end of the first support tube 21. The first support tube 21 is provided with a first lifting drive member corresponding to the air pipe 22. The first lifting drive member includes a first lifting cylinder 23, which is located at the outer periphery of the first supporting tube 21 and the axial directions of the first lifting cylinder 23 and the first supporting tube 21 are arranged parallel, and the bottom end of the first lifting cylinder 23 is connected to the outer periphery of the first supporting tube 21; the top end of the piston rod of the first lifting cylinder 23 is connected to the end of the air pipe 22 away from the blocking airbag 20 through a connecting block, so that the first lifting drive member is driven and connected to the air pipe 22, and subsequently the air pipe 22 can be driven by the first lifting cylinder 23 to drive the blocking airbag 20 to move along the axial direction of the first supporting tube 21.

[0051] A protective tube 24 is coaxially supported in the first support tube 21. The protective tube 24 is open at one end and closed at the other end, and the open end of the protective tube 24 is arranged close to the open end of the first support tube 21. The blocking airbag 20 is accommodated in the protective tube 24 and the trachea 22 is coaxially passed through the closed end of the protective tube 24; the closed end of the protective tube 24 is evenly provided with a plurality of water-permeable holes 240. The closed end of the casing 24 is also connected to a connecting rod 241; the axial directions of the connecting rod 241 and the first support tube 21 are arranged in parallel; the end of the connecting rod 241 away from the casing 24 is passed through the closed end of the first support tube 21; the first support tube 21 is provided with a second lifting drive member corresponding to the casing 24, and the second lifting drive member includes a second lifting cylinder 25; the second lifting cylinder 25 is located at the outer periphery of the first support tube 21 and the axial directions of the second lifting cylinder 25 and the first support tube 21 are arranged in parallel, and the bottom end of the second lifting cylinder 25 is connected to the outer periphery of the first support tube 21; the top end of the piston rod of the second lifting cylinder 25 is connected to the end of the connecting rod 241 away from the casing 24 through a connecting block; the second lifting drive member is driven and connected to the casing 24, and the casing 24 can be driven to move along the axial direction of the first support tube 21 through the second lifting cylinder 25 subsequently.

[0052] Reference Figures 6 to 8 , the specific steps of step S5 are as follows: S5.1: Installation of the water cut-off device 2: Connect and fix the first connecting flange 211 at the open end of the first support tube 21 to the end flange of the gate valve 13 on the water cut-off interface pipe 12: S5.2: Open gate valve 13; S5.3: The first lifting cylinder 23 drives the air pipe 22 to drive the blocking airbag 20 to move toward the inner cavity of the water supply pipe 1; at the same time, the second lifting cylinder 25 drives the casing 24 to move synchronously with the blocking airbag 20; S5.4: After the plugging airbag 20 completely enters the inner cavity of the water supply pipe 1, the second lifting cylinder 25 drives the casing 24 to retract into the first supporting tube 21; S5.5: Inflate the blocking airbag 20 through the air pipe 22 to expand the blocking airbag 20 and block the inner cavity of the water supply pipe 1, thereby limiting the water supply from the water supply pipe 1 to the damaged pipe section.

[0053] The second lifting cylinder 25 drives the protective tube 24 to move synchronously with the blocking airbag 20, so that the blocking airbag 20 can always be located in the protective tube 24 during the process of moving toward the water supply pipe 1. The protective tube 24 is used to wrap and protect the blocking airbag 20, thereby effectively preventing the blocking airbag 20 from being scratched and damaged by the incision of the water supply pipe 1 when passing through the incision of the water supply pipe 1.

[0054] By arranging a plurality of water-permeable holes 240 at the closed end of the protective tube 24, when the protective tube 24 moves synchronously with the blocking airbag 20, water in the water supply pipe 1 can enter and exit the protective tube 24 through the water-permeable holes 240, which is helpful to reduce the resistance of the protective tube 24 when moving.

[0055] S6: Pipe segment replacement: refer to Fig. 9 and Fig.10 , the specific steps are as follows: S6.1: Remove the damaged pipe section and reinstall the new pipe section in situ; S6.2: Connect the branch pipe on the new pipe section to the user's water pipe.

[0056] S7: New pipe section connected to water: refer to Figures 6 to 8 , remove the water cut-off devices 2 on the two water cut-off interface pipes 12, and seal the water cut-off interface pipes 12, and supply water to the new pipe section through the water supply pipe 1.

[0057] The specific steps of step S7 are as follows: S7.1: Release the gas from the blocking balloon 20 through the trachea 22; S7.2: The casing 24 is driven to move by the second lifting cylinder 25 until the casing 24 enters the inner cavity of the water supply pipe 1; S7.3: The air pipe 22 is driven by the first lifting cylinder 23 to drive the blocking airbag 20 to move upward until the blocking airbag 20 enters the casing 24; S7.4: The first lifting cylinder 23 and the second lifting cylinder 25 are used to drive the blocking airbag 20 and the protective tube 24 to be synchronously retracted into the first supporting tube 21; S7.5: Close the gate valve 13 on the water cut-off interface pipe 12 to seal the water cut-off interface pipe 12; S7.6: Remove the first support cylinder 21 from the gate valve 13.

[0058] When removing the water cut-off device 2, the blocking airbag 20 is first inserted into the casing 24, and then the blocking airbag 20 and the casing 24 are synchronously retracted into the first support tube 21. This helps to reduce the contact between the blocking airbag 20 and the incision of the water supply pipe 1 during movement, which may cause the blocking airbag 20 to be cut and scratched.

[0059] S8: Temporary pipe 10 removal: refer to Fig.10 , block the water supply interface pipe 11 and remove the temporary pipe 10, and supply water to the new pipe section through the water supply pipe 1 alone; the specific steps are as follows: S8.1: Close the gate valve 13 on the water supply interface pipe 11; S8.2: Disconnect the temporary pipe 10 from the user's water pipe; S8.3: Disconnect the connection between the temporary pipe 10 and the gate valve 13 on the water supply interface pipe 11; S8.4: Remove temporary pipe 10.

[0060] S9: Reference Figure 11 to Figure 12 A sealing plate 30 is installed on the interface flanges 14 of both the water supply interface pipe 11 and the water cutoff interface pipe 12 through the sealing member installation device 3 to seal the interface flanges 14 .

[0061] The outer contour of the sealing plate 30 is matched with the inner contour of the interface flange 14. A plurality of threaded holes 141 are provided on the outer circumference of the interface flange 14; the plurality of threaded holes 141 are evenly distributed around the axial direction of the interface flange 14; and the threaded holes 141 are all connected to the inner circumference of the interface flange 14; and studs 142 are threadedly connected in the threaded holes 141. A support ring 143 is coaxially welded to the bottom of the inner circumference of the interface flange 14, and the support ring 143 is used for the sealing plate 30 to abut against, so as to support and position the sealing plate 30. When the sealing plate 30 abuts against the support ring 143, the outer circumference of the sealing plate 30 and the plurality of threaded holes 141 on the inner circumference of the interface flange 14 are arranged relative to each other.

[0062] The seal installation device 3 includes a second support tube 31, one end of the second support tube 31 is open and the other end is blocked. The second support tube 31 is coaxially connected to the open end of the second support tube 31 with a second connecting flange 311. A driving rod 32 is coaxially supported in the second support tube 31; one end of the driving rod 32 is threadedly connected to the sealing plate 30. The driving rod 32 is arranged in the closed end of the second support tube 31 away from the sealing plate 30, and the end of the driving rod 32 away from the sealing plate 30 is also connected to a gripping handle 321.

[0063] The specific steps of step S9 are as follows: S9.1: Install the seal installation device 3: connect and fix the second connecting flange 311 at the open end of the second support tube 31 to the end flange of the gate valve 13; S9.2: Open gate valve 13; S9.3: Move the driving rod 32 toward the interface flange 14 close to the water cut-off interface pipe 12 until the sealing plate 30 connected to the end of the driving rod 32 moves into the interface flange 14 and abuts against the support ring 143; S9.4: Tighten the studs 142 in the threaded holes 141 on the outer periphery of the interface flange 14 until the studs 142 are tightly pressed against the outer periphery of the sealing plate 30; S9.5: The driving rod 32 is retracted into place: the driving rod 32 is rotated until the driving rod 32 is separated from the sealing plate 30; S9.6: Removal of the seal installation device 3: Remove the second support cylinder 31 from the gate valve 13.

[0064] The interface flange 14 is temporarily blocked by the cooperation between the plurality of studs 142 on the interface flange 14 and the sealing plate 30 , thereby facilitating the removal of the gate valve 13 from the interface flange 14 and facilitating the reuse of the gate valve 13 .

[0065] By setting a support ring 143 around the inner periphery of the interface flange 14, when the driving rod 32 is subsequently moved downward to insert the sealing plate 30 into the inner periphery of the interface flange 14, the sealing plate 30 inserted into the interface flange 14 can be supported and positioned by the support ring 143, so that the sealing plate 30 can be accurately moved into the inner periphery of the interface flange 14, so that the studs 142 can be better pressed against the outer periphery of the sealing plate 30.

[0066] By threading the end of the driving rod 32 with the sealing plate 30, on the one hand, when the sealing plate 30 is installed in the interface flange 14, the sealing plate 30 can be stably driven to move by the driving rod 32; on the other hand, after the sealing plate 30 is subsequently fixed in the interface flange 14 by using a plurality of studs 142 on the interface flange 14, the driving rod 32 can be separated from the sealing plate 30 by rotating the driving rod 32, thereby facilitating the recovery and removal of the driving rod 32.

[0067] S10: Reference Figure 13 to Figure 14 , remove the gate valve 13 on the interface flange 14 of the water supply interface pipe 11 and the water cut-off interface pipe 12; S11: Install the fixed flange cover 4 at the end of the interface flange 14.

[0068] During the replacement of the damaged pipe section of the water supply pipe 1, the water supply pipe 1 does not need to be shut down, which effectively reduces the impact of the pipe section replacement construction on the normal production and life of the surrounding residents. The new pipe section is reinstalled in the original position of the damaged pipe section, which effectively reduces the overall excavation workload of the construction, which is conducive to better saving construction time and reducing the overall construction cost.

[0069] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for replacing a water supply pipeline without stopping water, characterized in that: The following steps are involved: S1: Temporary pipe (10) in place: a temporary pipe (10) is laid on the ground next to the damaged pipe section of the water supply pipe (1); S2: Interface pipe installation: welding and installing a water supply interface pipe (11) and a water cut-off interface pipe (12) on the normal pipe sections at both ends of the damaged pipe section of the water supply pipe (1), wherein the water cut-off interface pipe (12) is arranged close to the damaged pipe section of the water supply pipe (1); S3: Pipeline drilling: drilling holes in the water supply pipe (1) through a drilling device on the water supply interface pipe (11) and the water cut-off interface pipe (12), so that the water supply interface pipe (11) and the water cut-off interface pipe (12) are both connected to the water supply pipe (1); S4: temporary pipe (10) connection construction: the two ends of the temporary pipe (10) are respectively connected to the water supply interface pipes (11) at the two ends of the damaged pipe section of the water supply pipe (1), so that the damaged pipe section of the water supply pipe (1) and the temporary pipe (10) can supply water simultaneously; S5: Damaged pipe section plugging treatment: installing water cut-off devices (2) on the water cut-off interface pipes (12) at both ends of the damaged pipe section of the water supply pipe (1), and using the water cut-off devices (2) to cut off and plug the two ends of the damaged pipe section of the water supply pipe (1); S6: Pipe segment replacement: remove the damaged pipe segment and reinstall the new pipe segment in situ; S7: connecting the new pipe section to water: removing the water cut-off devices (2) on the two water cut-off interface pipes (12), and sealing the water cut-off interface pipes (12), and supplying water to the new pipe section through the water supply pipe (1); S8: Removal of the temporary pipe (10): The water supply interface pipe (11) is blocked and the temporary pipe (10) is removed, and water is supplied to the new pipe section solely through the water supply pipe (1).

2. The method for replacing a water supply pipeline without stopping water supply according to claim 1, characterized in that: The water supply interface pipe (11) and the water cut-off interface pipe (12) are both coaxially connected with an interface flange (14) at one end away from the water supply pipe (1); In step S2, after the water supply interface pipe (11) and the water cut-off interface pipe (12) are welded to the normal pipe section of the water supply pipe (1), the gate valve (13) is installed on the interface flanges (14) of the water supply interface pipe (11) and the water cut-off interface pipe (12); In step S3: after the water supply interface pipe (11) and the water cut-off interface pipe (12) have been perforated in the water supply pipe (1) by a perforating device, the water supply interface pipe (11) and the water cut-off interface pipe (12) are respectively blocked by gate valves (13) installed on both the water supply interface pipe (11) and the water cut-off interface pipe (12).

3. The method for replacing a water supply pipeline without stopping water supply according to claim 2, characterized in that: The water cut-off device (2) comprises a first support tube (21), one end of the first support tube (21) is open and the other end is closed; a first connecting flange (211) is coaxially arranged at the open end of the first support tube (21), a blocking airbag (20) is also arranged inside the first support tube (21), the blocking airbag (20) is connected to an air pipe (22), and the air pipe (22) is coaxially penetrated through the closed end of the first support tube (21); the first support tube (21) is provided with a first lifting drive member corresponding to the air pipe (22), the first lifting drive member is drivingly connected to the air pipe (22), and is used to drive the air pipe (22) to drive the blocking airbag (20) to move radially along the first support tube (21); In step S2, the water supply pipe (1) is subjected to water cut-off treatment by means of the water cut-off device (2), and after the first connecting flange (211) at the open end of the first support tube (21) is connected to the end flange of the gate valve (13) on the water cut-off interface pipe (12), the air pipe (22) is driven by the first lifting drive member to drive the blocking airbag (20) to move along the radial direction of the first support tube (21) toward the water supply pipe (1) until the blocking airbag (20) passes through the incision between the gate valve (13) and the water supply pipe (1) and enters the water supply pipe (1); air is inflated into the blocking airbag (20) through the air pipe (22) so that the blocking airbag (20) expands and blocks the inner cavity of the water supply pipe (1).

4. The method for replacing a water supply pipeline without stopping water supply according to claim 3, characterized in that: A protective tube (24) is coaxially supported in the first support tube (21), one end of the protective tube (24) is open and the other end is closed, the open end of the protective tube (24) is close to the open end of the first support tube (21), the blocking airbag (20) is located in the protective tube (24), and the trachea (22) is coaxially penetrated through the closed end of the protective tube (24); the first support tube (21) is provided with a second lifting drive member corresponding to the protective tube (24), the second lifting drive member is drivingly connected to the protective tube (24) and is used to drive the protective tube (24) to move radially along the first support tube (21); In step S2, when the blocking airbag (20) is driven by the first lifting drive member to move radially toward the water supply pipe (1) along the first support tube (21), the protective tube (24) is driven by the second lifting drive member to move synchronously with the blocking airbag (20); after the blocking airbag (20) completely enters the inner cavity of the water supply pipe (1), the protective tube (24) is driven by the second lifting drive member to retract into the first support tube (21).

5. The method for replacing a water supply pipeline without stopping water supply according to claim 2, characterized in that: The following steps are also included: S9: Installing a sealing plate (30) on the interface flanges (14) of the water supply interface pipe (11) and the water cutoff interface pipe (12) by means of a sealing member installation device (3) to seal the interface flanges (14); S10: Remove the gate valves (13) on the water supply interface pipe (11) and the water cutoff interface pipe (12); S11: Install the fixed flange cover (4) at the end of the interface flange (14).

6. A construction method for replacing a water supply pipeline without stopping water supply according to claim 5, characterized in that: The interface flange (14) is provided with threaded holes (141) around its outer periphery, and the threaded holes (141) are all connected to the inner periphery of the interface flange (14); and studs (142) are threadedly connected in the threaded holes (141); The specific steps of step S9 are as follows: S9.1: Install the seal mounting device (3) at the end flange of the gate valve (13); S9.2: Open the gate valve (13), and insert the sealing plate (30) for sealing the interface flange (14) into the inner circumference of the interface flange (14) through the sealing member installation device (3); S9.3: Tighten the studs (142) on the outer periphery of the interface flange (14) until the studs (142) are tightly pressed against the outer periphery of the sealing plate (30) in the interface flange (14), so as to temporarily seal the interface flange (14) through the sealing plate (30); S9.4: Remove the seal mounting device (3) from the gate valve (13).

7. A construction method for replacing a water supply pipeline without stopping water supply according to claim 6, characterized in that: The sealing member installation device (3) comprises a second support tube (31), wherein one end of the second support tube (31) is open and the other end is closed; the open end of the second support tube (31) is coaxially connected to a second connecting flange (311); a driving rod (32) is coaxially supported inside the second support tube (31); one end of the driving rod (32) is inserted into the closed end of the second support tube (31), and the other end of the driving rod (32) is threadedly connected to the sealing plate (30); In step S9.2, the second connecting flange (311) at the open end of the second support tube (31) is connected to the flange end of the gate valve (13); after the gate valve (13) is opened, the driving rod (32) is moved radially along the second support tube (31) toward the water supply pipe (1) until the sealing plate (30) moves to the inner periphery of the interface flange (14); In step S9.3, after the stud (142) is tightly pressed against the outer periphery of the sealing plate (30), the driving rod (32) is rotated to separate the driving rod (32) from the sealing plate (30).

8. The method for replacing a water supply pipeline without stopping water supply according to claim 7, characterized in that: A support ring (143) is coaxially connected to the inner circumference of the interface flange (14), and the support ring (143) is used for abutting against the sealing plate (30); When the bottom of the sealing plate (30) abuts against the supporting ring (143), the threaded hole (141) is arranged opposite to the outer periphery of the sealing plate (30).

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