A method for trenchless rehabilitation of a pipe

Abstract

The application discloses a pipeline trenchless repair method, which comprises the following steps: installing a middle guide pipe section in the pipeline one by one through a pipe hoisting mechanism, each middle guide pipe section is arranged on the inner lining of the pipeline through two supporting legs, and the adjacent middle guide pipe sections are sequentially connected to form a middle guide pipe; introducing water flow into the middle guide pipe to form a dry environment in the pipeline; moving the pipe hoisting mechanism to the middle guide pipe section corresponding to the inner lining to be repaired of the pipeline; supporting the middle guide pipe section corresponding to the inner lining to be repaired of the pipeline through the pipe hoisting mechanism, and removing the supporting leg corresponding to the middle guide pipe section; repairing the inner lining to be repaired of the pipeline; reassembling the removed supporting leg to the original position; moving the pipe hoisting mechanism to the middle guide pipe section corresponding to the next inner lining to be repaired of the pipeline, and repeating the operation until the inner lining of the whole pipeline is repaired, and the trenchless repair of the inner lining of the pipeline can be realized through the arrangement of the pipe hoisting mechanism.

Description

Technical Field

[0001] This invention belongs to the field of trenchless repair construction for urban pipelines. Background Technology

[0002] In trenchless stainless steel lining repair of pipelines, a central guide pipe is required as a temporary drainage pipe to create a dry environment for the pipeline. The central guide pipe (hereinafter referred to as "central guide pipe") is connected by flanges in the form of pipe sections and steel support legs are installed below the pipe sections for welding fixation.

[0003] Due to the confined space inside the pipeline and the heavy weight of the intermediate guide pipe section, the connection, installation, and fixation of the intermediate guide pipe section are extremely difficult and pose significant construction safety risks.

[0004] After the installation of the central guide tube is completed, the original pipeline needs to be lined and repaired. At this time, the support of the central guide tube will occupy the construction position, causing interference to the construction and increasing the difficulty and risk of construction. Summary of the Invention

[0005] This invention aims to provide a trenchless pipeline repair method to solve two problems: the difficulty of lifting and connecting the central guide tube within the limited space of the pipeline during installation and the interference caused by temporary central guide tube supports during pipeline lining repair.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A trenchless pipeline repair method includes:

[0008] Step 1: Install the intermediate guide pipe sections one by one in the pipeline using an in-pipe hoisting mechanism. Each intermediate guide pipe section is set on the pipeline lining by two support legs. Adjacent intermediate guide pipe sections are connected in sequence to form an intermediate guide pipe.

[0009] Step 2: Introduce water into the central conduit to create a dry environment inside the conduit;

[0010] Step 3: Move the pipe hoisting mechanism to the middle guide pipe section corresponding to the inner lining of the pipe to be repaired;

[0011] Step 4: Support the middle guide pipe section corresponding to the lining to be repaired in the pipeline using the in-pipe hoisting mechanism;

[0012] Step 5: Remove the support legs corresponding to the middle guide pipe section and repair the inner lining of the pipe to be repaired;

[0013] Step 6: Reinstall the removed outriggers back into their original positions;

[0014] Step 7: Move the pipe hoisting mechanism to the next pipe section corresponding to the lining to be repaired, and repeat steps 4 to 6 until the lining of the entire pipe is repaired.

[0015] Preferably, in the above-described trenchless pipeline repair method, the in-pipe lifting mechanism is a fixed lever hanger. The fixed lever hanger includes a lever beam, a lever beam lifting device, a main support, a fulcrum fixing plate, fixing bolts, and a support fixing plate. The fulcrum fixing plate and the lever beam lifting device are respectively located at both ends of the lever beam. The main support is vertically oriented, and the support fixing plate is located at the lower end of the main support. The upper end of the main support supports the lever beam. The distance from the connection point between the main support and the lever beam to the connection point between the lever beam lifting device and the lever beam is less than the distance from the connection point between the main support and the lever beam to the fulcrum. The distance between the connection point of the fixed plate and the lever beam; the lower surface of the support fixed plate is in contact with the outer surface of the middle guide tube section; the fulcrum fixed plate includes a fulcrum base plate and a fulcrum mounting plate; the lower surface of the fulcrum base plate is in contact with the outer surface of the middle guide tube section; the fulcrum mounting plate is vertically arranged; the lower end of the fulcrum mounting plate is fixedly connected to one end of the fulcrum base plate; one end of the lever beam is fixedly connected to the fulcrum mounting plate; bolt holes are provided on the fulcrum mounting plate for bolt connection with the flange bolt at the end of the middle guide tube section; the fulcrum mounting plate is bolted to the flange bolt at the end of the middle guide tube section by fixing bolts.

[0016] Preferably, in the above-described trenchless pipeline repair method, step 1 includes:

[0017] Step 11: Install the first intermediate guide pipe section inside the pipeline. The first intermediate guide pipe section is set on the pipeline lining through the corresponding support legs.

[0018] Step 12: Move the fixed lever hanger onto the newly installed intermediate guide pipe section, so that the support fixing plate and the fulcrum fixing plate abut against the front and rear flanges of the newly installed intermediate guide pipe section respectively, and connect the fulcrum fixing plate to the rear flange of the newly installed intermediate guide pipe section with fixing bolts.

[0019] Step 13: Transport the intermediate guide pipe section to be installed to the location, and use slings to fix the middle part of the intermediate guide pipe section to be installed. The upper end of the slings is connected to the lever beam lifting device, and the intermediate guide pipe section to be installed is lifted to the installation position by the lever beam lifting device.

[0020] Step 14: Connect the flange corresponding to the intermediate guide pipe section to be installed to the flange of the intermediate guide pipe section that has just been installed by bolting the bolt holes together. Keep two bolt holes on both sides of the top rear end of the intermediate guide pipe section to be installed for use in the next installation of the fixed lever hanger. Set the support leg between the intermediate guide pipe section to be installed and the inner lining of the pipe to complete the installation of the intermediate guide pipe section to be installed.

[0021] Step 15: Repeat steps 12 to 14. In step 12, the fulcrum fixing plate is bolted to the flange at the rear end of the newly installed intermediate guide pipe section at the two reserved bolt holes using fixing bolts. This completes the installation of all intermediate guide pipe sections and forms the intermediate guide pipe.

[0022] Preferably, in the above-mentioned trenchless pipeline repair method, the support fixing plate includes a support base plate and a support mounting plate. The support mounting plate is vertically arranged, and the lower end of the support mounting plate is fixedly connected to one end of the support base plate. The outer surfaces of the support mounting plate and the support mounting plate respectively abut against the inner surfaces of the flanges at both ends of the intermediate guide pipe section.

[0023] Preferably, in the above-mentioned trenchless pipeline repair method, a first diagonal brace is provided on each side of the main support. The upper end of the first diagonal brace is connected to the lever beam, and the lower end of the first diagonal brace is connected to the base plate of the support. The plane of the first diagonal brace is perpendicular to the lever beam.

[0024] Preferably, in the above-described trenchless pipeline repair method, a second diagonal brace is provided between the main support and the lever beam. The upper end of the second diagonal brace is connected to the lever beam, the upper end of the second diagonal brace is located between the lever beam lifting device and the main support, the lower end of the second diagonal brace is connected to the lower part of the main support, and the plane where the first diagonal brace is located is perpendicular to the plane where the second diagonal brace is located.

[0025] Preferably, in the above-mentioned trenchless pipeline repair method, the main support is made of I-beams, and stiffening plates are respectively installed at the connection points between the main support and the lever beam on both sides.

[0026] Preferably, in the above-mentioned trenchless pipeline repair method, the in-pipe lifting mechanism is an in-pipe mobile crane. The in-pipe mobile crane includes a main beam, two supports, and a crane lifting device for lifting the intermediate guide pipe section. The two ends of the main beam are set inside the pipeline through the two supports. The main beam is horizontally set and perpendicular to the central axis of the pipeline. The crane lifting device is suspended below the middle of the main beam. The projection of the lifting point of the crane lifting device on the horizontal plane coincides with the projection of the central axis of the pipeline on the horizontal plane. Each support includes two support rods. The upper end of each support rod is connected to the main beam, and a base is provided at the lower end of each support rod.

[0027] Preferably, in the above-mentioned trenchless pipeline repair method, the support is an adjustable movable support, which includes a roller shaft, a rolling wheel, a sleeve, and a support fixing plate. One end of the sleeve is fixedly connected to the support fixing plate, and the outer surface of the support fixing plate matches the inner lining surface of the pipeline. The upper end of the roller shaft is coaxially connected to one end of the corresponding support rod, and the lower end of the roller shaft is connected to the rolling wheel. The sleeve is coaxially sleeved on the outside of the roller shaft. The sleeve and the roller shaft have pin holes at equal intervals along the axial direction of the support rod. The number of pin holes on the rolling shaft is at least one more than the number of pin holes on the sleeve. By using pins to connect the pin holes on the sleeve with different pin holes on the roller shaft, the relative positions of the rolling wheel and the sleeve can be switched, so that the rolling wheel is located inside or outside the sleeve.

[0028] Preferably, in the above-described trenchless pipeline repair method, step 1 includes:

[0029] Step 11': Use pins to set the rolling wheel outside the sleeve, so that the rolling wheel is supported on the inner lining of the pipe, and move the mobile hoist inside the pipe to the hoisting point of the middle guide pipe section;

[0030] Step 12': Use a pin to place the rolling wheel inside the sleeve, so that the support fixing plate is supported on the pipe lining;

[0031] Step 13': Transport the first intermediate guide pipe section to the location, install slings on the crane lifting device, use the slings to fix the middle part of the first intermediate guide pipe section, and lift the first intermediate guide pipe section to the installation position using the crane lifting device;

[0032] Step 14': Install support legs between the first intermediate guide pipe section and the inner lining of the pipe;

[0033] Step 15': Use the pin to set the rolling wheel outside the sleeve, so that the rolling wheel is supported on the inner lining of the pipe, and move the mobile hoist inside the pipe to the next middle pipe section hoisting location;

[0034] Step 16': Use a pin to place the rolling wheel inside the sleeve, so that the support fixing plate is supported on the pipe lining;

[0035] Step 17': Transport the intermediate guide pipe section to be installed to the location, use slings to fix the middle part of the intermediate guide pipe section to be installed, and use a crane lifting device to lift the intermediate guide pipe section to be installed to the installation position.

[0036] Step 18': Connect the intermediate guide pipe section to be installed to the flange corresponding to the previously installed intermediate guide pipe section by bolting the holes together.

[0037] Step 19': Install support legs between the intermediate guide pipe section to be installed and the inner lining of the pipe to complete the installation of the intermediate guide pipe section to be installed;

[0038] Step 20', repeat steps 16' to 19' to complete the installation of all middle catheter segments and form the middle catheter.

[0039] Preferably, in the above-mentioned trenchless pipeline repair method, when the in-pipe mobile crane needs to lift the middle guide pipe section in the pipeline, the pin hole on the sleeve near the support fixing plate and the pin hole on the roller shaft near the rolling wheel are connected by a pin, and the rolling wheel is located inside the sleeve; when the in-pipe mobile crane needs to move in the pipeline, the pin hole on the sleeve away from the support fixing plate and the pin hole on the roller shaft away from the rolling wheel are connected by a pin, and the rolling wheel is located outside the sleeve.

[0040] Preferably, in the above-mentioned trenchless pipeline repair method, the angle between the support rod and the horizontal direction along the pipeline is 75°, and the angle between the support rod and the horizontal direction along the pipeline is 65°.

[0041] As can be seen from the above-disclosed technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] This invention provides a trenchless pipeline repair method. The method involves installing intermediate guide pipe sections one by one inside the pipeline using an in-pipe lifting mechanism. Each intermediate guide pipe section is mounted on the pipeline lining via two support legs. Adjacent intermediate guide pipe sections are connected sequentially to form an intermediate guide pipe. Water is introduced into the intermediate guide pipe to create a dry environment inside the pipeline. The in-pipe lifting mechanism is moved to the intermediate guide pipe section corresponding to the pipeline lining to be repaired. The in-pipe lifting mechanism supports the intermediate guide pipe section corresponding to the pipeline lining to be repaired, and the support legs corresponding to the intermediate guide pipe section are removed. The pipeline lining to be repaired is then repaired. The removed support legs are reinstalled. The in-pipe lifting mechanism is moved to the next intermediate guide pipe section corresponding to the pipeline lining to be repaired, and this process is repeated until the entire pipeline lining is repaired. By using the in-pipe lifting mechanism, trenchless pipeline lining repair can be achieved. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a fixed lever hanger in one embodiment.

[0044] Figure 2 yes Figure 1 Top view.

[0045] Figure 3 yes Figure 1 The left view.

[0046] Figure 4 This is a schematic diagram of the fulcrum fixed plate.

[0047] Figure 5 yes Figure 4 The left view.

[0048] Figure 6 This is a structural diagram of the support fixing plate.

[0049] Figure 7 yes Figure 6 The left view.

[0050] Figure 8 This is a structural schematic diagram of step 12 of a trenchless pipeline repair method according to an embodiment.

[0051] Figure 9 yes Figure 8 The left view.

[0052] Figure 10 This is a structural schematic diagram of step 13 of a trenchless pipeline repair method according to an embodiment.

[0053] Figure 11 This is a structural schematic diagram of step 14 of a trenchless pipeline repair method according to an embodiment.

[0054] Figure 12 This is a structural schematic diagram of step 15 of a trenchless pipeline repair method according to an embodiment.

[0055] Figure 13 This is a structural schematic diagram of step 2 of a trenchless pipeline repair method according to an embodiment.

[0056] Figure 14 This is a structural schematic diagram of step 3 of a trenchless pipeline repair method according to an embodiment.

[0057] Figure 15 This is a structural schematic diagram of step 4 of a trenchless pipeline repair method according to an embodiment.

[0058] Figure 16 This is a structural schematic diagram of step 5 of a trenchless pipeline repair method according to an embodiment.

[0059] Figure 17 This is a schematic diagram of the structure of the mobile crane inside the pipe in another embodiment.

[0060] Figure 18 yes Figure 17 Side view.

[0061] Figure 19 yes Figure 17 Top view.

[0062] Figure 20This is a schematic diagram of an adjustable movable support when the rolling wheel is inside the sleeve.

[0063] Figure 21 This is a schematic diagram of an adjustable movable support when the rolling wheel is located outside the sleeve.

[0064] Figure 22 This is a schematic diagram showing the connection between the roller shaft and the roller.

[0065] Figure 23 This is a schematic diagram showing the connection between the sleeve and the support plate of the rolling wheel.

[0066] Figure 24 This is a schematic diagram of a mobile hoist located inside a pipeline.

[0067] Figure 25 yes Figure 24 Side view.

[0068] Figure 26 yes Figure 24 Top view.

[0069] Figure 27 This is a diagram showing the usage state of the mobile crane located inside the pipe in another embodiment.

[0070] Figure 28 This is a diagram showing the usage status of a mobile hoist inside a pipe, used to lift a pipe section within the pipe, in another embodiment.

[0071] In the diagram: 1-Fixed lever hanger, 11-Lever beam, 12-Lever beam lifting device, 13-Main support column, 14-Fusel fixing plate, 141-Fusel base plate, 142-Fusel mounting plate, 15-Fixing bolt, 16-Support fixing plate, 161-Support base plate, 162-Support mounting plate, 17-First diagonal brace, 18-Second diagonal brace, 1'-In-pipe mobile crane, 11'-Main beam, 12'-Crane lifting device, 13'-Support rod, 14'-Adjustable movable support, 141'-Roller shaft, 142'-Rolling wheel, 143'-Sleeve, 144'-Support fixing plate, 145'-Pin, 15'-Horizontal connecting rod, 16'-Vertical connecting rod, 2-Pipeline, 3-Intermediate guide pipe section, 4-Outrigger, 5-Flange, 6-Lifting strap. Detailed Implementation

[0072] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below with reference to the listed embodiments and the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below are consistent with the upper and lower directions in the accompanying drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0073] Example 1

[0074] Please see Figures 1 to 16 This embodiment discloses a trenchless pipeline repair method, including:

[0075] Step 1: Install the intermediate guide pipe sections 3 one by one in the pipe 2 through an in-pipe hoisting mechanism. Each intermediate guide pipe section 3 is set on the inner lining of the pipe 2 through two support legs 4. Adjacent intermediate guide pipe sections 3 are connected in sequence to form an intermediate guide pipe.

[0076] For the best options, please participate. Figures 1 to 7The in-pipe hoisting mechanism is a fixed lever hanger 1. The fixed lever hanger 1 includes a lever beam 11, a lever beam lifting device 12, a main support 13, a fulcrum fixing plate 14, fixing bolts 15, and a support fixing plate 16. The fulcrum fixing plate 14 and the lever beam lifting device 12 are respectively located at both ends of the lever beam 11. The main support 13 is vertically arranged, and the support fixing plate 16 is located at the lower end of the main support 13. The upper end of the main support 13 supports the lever beam 11. The distance from the connection point of the main support 13 and the lever beam 11 to the connection point of the lever beam lifting device 12 and the lever beam 11 is less than the distance from the connection point of the main support 13 and the lever beam 11 to the fulcrum fixing plate 14 and the lever beam 11. The distance at the connection point, the lower surface of the support fixing plate 16 is in contact with the outer surface of the middle guide pipe section 3, the fulcrum fixing plate 14 includes a fulcrum base plate 141 and a fulcrum mounting plate 142, the lower surface of the fulcrum base plate 141 is in contact with the outer surface of the middle guide pipe section 3, the fulcrum mounting plate 142 is vertically arranged, the lower end of the fulcrum mounting plate 142 is fixedly connected to one end of the fulcrum base plate 141, one end of the lever beam 11 is fixedly connected to the fulcrum mounting plate 142, the fulcrum mounting plate 142 is provided with bolt holes for bolt connection with the flange 5 at the end of the middle guide pipe section 3, the fulcrum mounting plate 142 is bolted to the flange 5 at the end of the middle guide pipe section 3 by fixing bolts 15. By setting up the fulcrum fixing plate 14, the support fixing plate 16, and the fixing bolts 15, a stable connection can be achieved between the fixed lever hanger 1 and the already installed intermediate guide pipe section 3. By setting up the lever beam lifting device 12, the intermediate guide pipe section 3 can be lifted safely and effortlessly in the narrow space of the pipe 2, and the intermediate guide pipe section 3 can be temporarily supported. This creates favorable conditions for the connection and installation of the intermediate guide pipe section 3 and the fixation of the support leg 4. Furthermore, the support leg 4 can be removed by temporarily supporting the intermediate guide pipe section 3, creating sufficient space for the repair of the pipe lining 2 below the intermediate guide pipe section 3.

[0077] Preferably, in the above-described trenchless pipeline repair method, the support fixing plate 16 includes a support base plate 161 and a support mounting plate 162. The support mounting plate 162 is vertically arranged, and its lower end is fixedly connected to one end of the support base plate 161. The outer surfaces of the fulcrum mounting plate 142 and the support mounting plate 162 respectively abut against the inner surfaces of the flanges 5 at both ends of the intermediate conduit pipe section 2. In use, the outer surfaces of the fulcrum mounting plate 142 and the support mounting plate 162 are respectively abutted against the inner surfaces of the flanges 5 at both ends of the intermediate conduit pipe section 2, and the lower surfaces of the fulcrum base plate 141 and the support base plate 161 are respectively abutted against the outer surface of the intermediate conduit pipe section 2, thereby improving the connection stability between the fixed lever hanger 1 and the intermediate conduit pipe section 2.

[0078] Preferably, in the above-described trenchless pipeline repair method, a first diagonal brace 17 is provided on each side of the main support 13. The upper end of the first diagonal brace 17 is connected to the lever beam 11, and the lower end of the first diagonal brace 17 is connected to the support base plate 161. The plane of the first diagonal brace 17 is perpendicular to the lever beam 11. By providing the first diagonal brace 17 and the second diagonal brace 18, the overall strength and stability of the fixed lever hanger 1 can be improved.

[0079] Preferably, in the above-described trenchless pipeline repair method, a second diagonal brace 18 is provided between the main support 13 and the lever beam 11. The upper end of the second diagonal brace 18 is connected to the lever beam 11, the upper end of the second diagonal brace 18 is located between the lever beam lifting device 12 and the main support 13, the lower end of the second diagonal brace 18 is connected to the lower part of the main support 13, and the plane where the first diagonal brace 17 is located is perpendicular to the plane where the second diagonal brace 18 is located.

[0080] Preferably, in the above-mentioned trenchless pipeline repair method, the main support 13 is made of I-beams, and stiffening plates are respectively installed at the connection points between the main support 13 and the lever beam 11 on both sides. By installing stiffening plates, the strength and stability of the main support 13 can be improved.

[0081] For preferred options, please refer to [link / reference]. Figures 8 to 12 In the above-mentioned trenchless pipeline repair method, step 1 includes:

[0082] Step 11: Install the first intermediate guide pipe section 3 inside the pipe 2. The first intermediate guide pipe section 3 is set on the inner lining of the pipe 2 through the corresponding support leg 4.

[0083] Step 12, please refer to Figure 8 and Figure 9 Move the fixed lever hanger 1 onto the newly installed middle guide pipe section 3, so that the support fixing plate 144' and the fulcrum fixing plate 14 abut against the front and rear flanges 5 of the newly installed middle guide pipe section 3 respectively, and connect the fulcrum fixing plate 14 to the rear flange 5 of the newly installed middle guide pipe section 3 by fixing bolts 15.

[0084] Step 13, please refer to Figure 10 The middle guide pipe section 3 to be installed is transported to the location, and the middle part of the middle guide pipe section 3 to be installed is fixed by the sling 6. The upper end of the sling 6 is connected to the lever beam lifting device 12, and the middle guide pipe section 3 to be installed is lifted to the installation position by the lever beam lifting device 12.

[0085] Step 14, please refer to Figure 11The intermediate guide pipe section 3 to be installed is connected to the flange corresponding to the intermediate guide pipe section 3 that has just been installed by bolting. The two bolt holes on both sides of the top rear end of the intermediate guide pipe section 3 to be installed are reserved for use in the next installation of the fixed lever hanger 1. The support leg 4 is set between the intermediate guide pipe section 3 to be installed and the inner lining of the pipe 2 to complete the installation of the intermediate guide pipe section 3 to be installed.

[0086] Step 15: Repeat steps 12 to 14. In step 12, the fulcrum fixing plate is bolted to the flange at the rear end of the newly installed middle guide pipe section using fixing bolts 15 at the two reserved bolt hole positions, thus completing the installation of all middle guide pipe sections 3 and forming the middle guide pipe.

[0087] Step 2: Introduce water into the middle conduit to create a dry chamber environment inside the conduit 2.

[0088] Step 3, please refer to Figure 13 The internal hoisting mechanism is moved to the middle guide pipe section corresponding to the lining of pipe 2 to be repaired.

[0089] Step 4, please refer to Figure 14 The pipe section 3 corresponding to the inner lining to be repaired in the pipe 2 is supported by the pipe hoisting mechanism.

[0090] Step 5, please refer to Figure 15 The support leg 4 corresponding to the middle guide pipe section 3 is removed, and the lining of the pipe 2 to be repaired is repaired. In this embodiment, lining repair refers to repairing or replacing the lining of the inner wall of the pipe 2 with a new lining.

[0091] Step 6, please refer to Figure 16 The removed support leg 4 was then reinstalled in its original position.

[0092] Step 7: Move the pipe hoisting mechanism to the next liner section 3 of the pipeline to be repaired, and repeat steps 4 to 6 until the liner of the entire pipeline 2 is repaired.

[0093] The trenchless pipeline repair method provided by this invention, by adopting an in-pipe hoisting mechanism, can safely and labor-savingly lift the middle guide pipe section 3 and temporarily support the middle guide pipe section 3 in the narrow space of the pipeline 2, creating favorable conditions for the connection and installation of the middle guide pipe section 3 and the fixation of the support leg 4. Furthermore, the support leg 4 can be removed by temporarily supporting the middle guide pipe section 3, creating sufficient space for the repair of the pipeline lining below the middle guide pipe section 3.

[0094] Implementation 2

[0095] Please see Figures 17 to 28 The difference between this embodiment and Embodiment 1 is that:

[0096] The in-pipe hoisting mechanism is an in-pipe mobile crane 1', which includes a main beam 11', two supports, and a crane lifting device 12' for lifting the middle guide pipe section 3. The two ends of the main beam 11' are set inside the pipe 2 through the two supports. The main beam 11' is horizontally set and perpendicular to the central axis of the pipe 2. The crane lifting device 12' is suspended below the middle of the main beam 11'. The projection of the lifting point of the crane lifting device 12' on the horizontal plane coincides with the projection of the central axis of the pipe 2 on the horizontal plane. Each support includes two support rods 13'. The upper end of each support rod 13' is connected to the main beam 11', and a base is set at the lower end of each support rod 13'. By employing the above-described structure of the in-pipe mobile crane 1', the middle guide pipe section 3 and its temporary support can be safely and labor-savingly lifted in the narrow space of the pipe 2. This creates favorable conditions for the connection and installation of the middle guide pipe section 3 and the fixation of the support legs 4. Alternatively, the support legs 4 can be removed by temporarily supporting the middle guide pipe section 3, creating sufficient space for the repair of the pipe lining below the middle guide pipe section 3. The repair of the pipe lining refers to patching or replacing the pipe lining with a new one.

[0097] Preferably, in the above-described trenchless pipeline repair method, the support is an adjustable movable support 14', which includes a roller shaft 141', a rolling wheel 142', a sleeve 143', and a support fixing plate 144'. One end of the sleeve 143' is fixedly connected to the support fixing plate 144', and the outer surface of the support fixing plate 144' matches the inner lining surface of the pipeline 2. The upper end of the roller shaft 141' is coaxially connected to one end of the corresponding support rod 13', and the lower end of the roller shaft 141' is connected to the rolling wheel 142'. The sleeve 143' is coaxially sleeved on the outside of the roller shaft 141'. Both the sleeve 143' and the roller shaft 141' have pin holes spaced at equal intervals along the axial direction of the support rod 13'. The number of pin holes on the roller shaft is at least one more than the number of pin holes on the sleeve 143'. By connecting the pin holes on the sleeve 143' with the different pin holes on the roller shaft 141' using pins, the relative positions of the roller 142' and the sleeve 143' can be switched, allowing the roller 142' to be located inside or outside the sleeve 143'. By employing an adjustable movable support 14', the mobile crane 1' can be stably supported within the pipe 2 when the intermediate guide pipe section 3 needs to be lifted within the pipe 2. Furthermore, the mobile crane 1' can be easily moved to the appropriate construction position when it needs to be moved within the pipe 2, reducing manpower input.

[0098] Preferably, in the above-described trenchless pipeline repair method, step 1 includes:

[0099] Step 11': Use pin 145' to set the rolling wheel 142' outside the sleeve 143', so that the rolling wheel 142' is supported on the inner lining of the pipe 2, and move the in-pipe mobile crane 1' to the hoisting position of the middle guide pipe section 3;

[0100] Step 12': Use pin 145' to place roller 142' inside sleeve 143' so that support fixing plate 144' is supported on pipe 2 lining;

[0101] Step 13': Transport the first intermediate guide pipe section 3 to the location, install slings 6 on the crane lifting device 12', use slings 6 to fix the middle part of the first intermediate guide pipe section 3, and lift the first intermediate guide pipe section 3 to the installation position using the crane lifting device 12';

[0102] Step 14': Install a support leg 4 between the first intermediate guide pipe section 3 and the inner lining of the pipe 2;

[0103] Step 15': Use pin 145' to set the rolling wheel 142' outside the sleeve 143', so that the rolling wheel 142' is supported on the inner lining of the pipe 2, and move the in-pipe mobile crane 1' to the next middle conduit pipe section 3 hoisting position;

[0104] Step 16': Use pin 145' to place roller 142' inside sleeve 143' so that support fixing plate 144' is supported on pipe 2 lining;

[0105] Step 17': Transport the intermediate guide pipe section 3 to be installed to the location, use slings 6 to fix the middle part of the intermediate guide pipe section 3 to be installed, and use the crane lifting device 12' to lift the intermediate guide pipe section 3 to be installed to the installation position;

[0106] Step 18': Connect the intermediate guide pipe section 3 to be installed to the flange corresponding to the previously installed intermediate guide pipe section 3 by bolting the holes together.

[0107] Step 19': Install a support leg 4 between the intermediate guide pipe section 3 to be installed and the inner lining of the pipe 2 to complete the installation of the intermediate guide pipe section 3 to be installed.

[0108] Step 20', repeat steps 16' to 19' to complete the installation of all middle guide tube segments 3, forming the middle guide tube.

[0109] Preferably, in the above-mentioned trenchless pipeline repair method, when the in-pipe mobile crane 1' needs to lift the middle guide pipe section 3 inside the pipeline 2, the pin hole on the sleeve 143' near the support fixing plate 144' and the pin hole on the roller shaft 141' near the rolling wheel 142' are connected by a pin 145', and the rolling wheel 142' is located inside the sleeve 143'; when the in-pipe mobile crane 1' needs to move inside the pipeline 2, the pin hole on the sleeve 143' away from the support fixing plate 144' and the pin hole on the roller shaft 141' away from the rolling wheel 142' are connected by a pin 145', and the rolling wheel 142' is located outside the sleeve 143'.

[0110] Preferably, in the above-mentioned trenchless pipeline repair method, the support rod 13' has an angle of 75° with the horizontal direction along the pipeline 2 and an angle of 65° with the horizontal direction along the vertical direction of the pipeline 2. This allows the in-pipe mobile crane 1' to be symmetrically arranged in the pipeline 2, front and back and left and right, while accommodating the conduit. This not only facilitates the manufacture of the in-pipe mobile crane but also makes the in-pipe mobile crane 1' more stable when in use.

[0111] Preferably, in the above-mentioned trenchless pipeline repair method, several transverse connecting rods 15' are provided between two support rods 13' in the same support, and a vertical connecting rod 16' is provided between each support rod 13' and the main beam 11'. By providing transverse connecting rods 15' and vertical connecting rods, the strength and stability of the support can be improved, thereby improving the stability of the crane lifting device 12'.

[0112] Preferably, in the above-mentioned trenchless pipeline repair method, the lever beam lifting device 12 and the crane lifting device 12' are manual hoists or electric hoists.

[0113] In summary, this invention provides a trenchless pipeline repair method. This method involves installing intermediate guide pipe sections one by one inside the pipeline using an in-pipe lifting mechanism. Each intermediate guide pipe section is mounted on the pipeline lining via two support legs, and adjacent intermediate guide pipe sections are connected sequentially to form an intermediate guide pipe. Water is introduced into the intermediate guide pipe to create a dry environment inside the pipeline. The in-pipe lifting mechanism is then moved to the intermediate guide pipe section corresponding to the pipeline lining to be repaired. The in-pipe lifting mechanism supports the intermediate guide pipe section corresponding to the pipeline lining to be repaired, and the support legs corresponding to the intermediate guide pipe section are removed. The pipeline lining to be repaired is then repaired. The removed support legs are reinstalled. The in-pipe lifting mechanism is then moved to the next intermediate guide pipe section corresponding to the pipeline lining to be repaired, and this process is repeated until the entire pipeline lining is repaired. By using the in-pipe lifting mechanism, trenchless pipeline lining repair can be achieved.

[0114] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A trenchless pipeline repair method, characterized in that, include: Step 1: Install the intermediate guide pipe sections one by one in the pipeline using an in-pipe hoisting mechanism. Each intermediate guide pipe section is set on the pipeline lining by two support legs. Adjacent intermediate guide pipe sections are connected in sequence to form an intermediate guide pipe. Step 2: Introduce water into the central conduit to create a dry environment inside the conduit; Step 3: Move the pipe hoisting mechanism to the middle guide pipe section corresponding to the inner lining of the pipe to be repaired; Step 4: Support the middle guide pipe section corresponding to the lining to be repaired in the pipeline using the in-pipe hoisting mechanism; Step 5: Remove the support legs corresponding to the middle guide pipe section and repair the inner lining of the pipe to be repaired; Step 6: Reinstall the removed outriggers back into their original positions; Step 7: Move the pipe hoisting mechanism to the next pipe section corresponding to the lining to be repaired, and repeat steps 4 to 6 until the lining of the entire pipe is repaired. The in-pipe hoisting mechanism is an in-pipe mobile crane. The in-pipe mobile crane includes a main beam, two supports, and a crane lifting device for lifting the middle guide pipe section. The two ends of the main beam are set inside the pipe through the two supports. The main beam is set horizontally and is perpendicular to the central axis of the pipe. The crane lifting device is suspended below the middle of the main beam. The projection of the lifting point of the crane lifting device on the horizontal plane coincides with the projection of the central axis of the pipe on the horizontal plane. Each support includes two support rods. The upper end of each support rod is connected to the main beam, and a support is set at the lower end of each support rod. The support is an adjustable movable support, which includes a roller shaft, a rolling wheel, a sleeve, and a support fixing plate. One end of the sleeve is fixedly connected to the support fixing plate. The outer surface of the support fixing plate matches the inner lining surface of the pipe. The upper end of the roller shaft is coaxially connected to one end of the corresponding support rod. The lower end of the roller shaft is connected to the rolling wheel. The sleeve is coaxially sleeved on the outside of the roller shaft. The sleeve and the roller shaft have pin holes at equal intervals along the axial direction of the support rod. The number of pin holes on the rolling shaft is at least one more than the number of pin holes on the sleeve. By using pins to connect the pin holes on the sleeve with different pin holes on the roller shaft, the relative position of the rolling wheel and the sleeve can be switched, so that the rolling wheel is located inside or outside the sleeve. The angle between the support rod and the horizontal direction along the pipe is 75°, and the angle between the support rod and the horizontal direction along the pipe is 65°.

2. The trenchless pipeline repair method as described in claim 1, characterized in that, When the mobile hoist inside the pipe needs to lift the middle guide pipe section inside the pipe, the pin hole on the sleeve near the support plate is connected to the pin hole on the roller shaft near the rolling wheel by a pin, and the rolling wheel is located inside the sleeve; when the mobile hoist inside the pipe needs to move inside the pipe, the pin hole on the sleeve away from the support plate is connected to the pin hole on the roller shaft away from the rolling wheel by a pin, and the rolling wheel is located outside the sleeve.

3. The trenchless pipeline repair method as described in claim 1, characterized in that, Step 1 includes: Step 11': Use pins to set the rolling wheel outside the sleeve, so that the rolling wheel is supported on the inner lining of the pipe, and move the mobile hoist inside the pipe to the hoisting point of the middle guide pipe section; Step 12': Use a pin to place the rolling wheel inside the sleeve, so that the support fixing plate is supported on the pipe lining; Step 13': Transport the first intermediate guide pipe section to the location, install slings on the crane lifting device, use the slings to fix the middle part of the first intermediate guide pipe section, and lift the first intermediate guide pipe section to the installation position using the crane lifting device; Step 14': Install support legs between the first intermediate guide pipe section and the inner lining of the pipe; Step 15': Use the pin to set the rolling wheel outside the sleeve, so that the rolling wheel is supported on the inner lining of the pipe, and move the mobile hoist inside the pipe to the next middle pipe section hoisting location; Step 16': Use a pin to place the rolling wheel inside the sleeve, so that the support fixing plate is supported on the pipe lining; Step 17': Transport the intermediate guide pipe section to be installed to the location, use slings to fix the middle part of the intermediate guide pipe section to be installed, and use a crane lifting device to lift the intermediate guide pipe section to be installed to the installation position; Step 18': Connect the intermediate guide pipe section to be installed to the flange corresponding to the previously installed intermediate guide pipe section by bolting the holes together. Step 19': Install support legs between the intermediate guide pipe section to be installed and the inner lining of the pipe to complete the installation of the intermediate guide pipe section to be installed; Step 20', repeat steps 16' to 19' to complete the installation of all middle catheter segments and form the middle catheter.

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