Splicing lining structure and method for repairing large-diameter pipeline

Abstract

The invention discloses a splicing lining structure and method for repairing a large-diameter pipeline, and belongs to the field of pipeline repairing. The splicing lining structure comprises a plurality of linings arranged in the axial direction of a pipe body, a grouting layer is arranged between the linings and the pipe body, a plurality of grouting holes are formed in the side wall of each lining, and one end of each lining is provided with a first hollow-square-shaped part, a horizontal part and a vertical part which are continuously bent; one end of each bushing is provided with a first hollow-square-shaped part and a second hollow-square-shaped part, the other end of each bushing is provided with a continuously-bent Z-shaped part, a second hollow-square-shaped part and a third hollow-square-shaped part, a push plate is installed on the face, close to the pipe body, of each bushing in a sliding mode, the push plates are connected to the self-locking parts and used for pushing the self-locking parts to be locked with the connecting bolts, and the adjacent bushes are in preliminary butt joint; and then proper grouting materials are injected through the grouting holes, the pushing plates are gradually pushed through filling of the grouting materials, the pushing plates are locked with the connecting bolts, and therefore final fixing between the two bushings is completed, and the mechanical connection strength between the bushings is further enhanced.

Description

Technical Field

[0001] The present invention relates to the field of pipeline repair, and in particular to a spliced ​​lining structure and method for repairing large-diameter pipelines. Background Art

[0002] With the acceleration of urbanization, underground pipeline networks, as an important part of urban infrastructure, have become increasingly important, especially large-diameter pipelines, which play an indispensable role in many fields such as water supply and drainage, oil, and natural gas. However, with the passage of time and changes in usage conditions, these pipelines will inevitably experience problems such as aging, corrosion, and rupture, which will affect their normal use functions and may even pose a serious threat to the environment and social security.

[0003] When using the liner pipe in the existing technology to repair the old pipeline, the liner pipe is passed through the old pipeline, and the two ends of the liner pipe are heated and flanged by heat treatment to fix the liner pipe. However, in actual application, when the inner diameter of the old pipeline is large and the old pipeline is long, the weight of the liner pipe is large. At this time, it is necessary to use multiple large equipment to assist workers in the construction, which makes the construction more complicated. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that for large-diameter pipelines, the inner lining pipe is heavy, and the construction requires the assistance of multiple large-scale equipment to assist workers, resulting in more complicated construction. A spliced ​​lining structure and method for repairing large-diameter pipelines are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A spliced ​​lining structure for repairing large-diameter pipelines comprises a plurality of bushings arranged axially along the pipe body, a grouting layer is provided between the bushings and the pipe body, a plurality of grouting holes are provided on the side walls of the bushings, one end of the bushings comprises a first continuously bent circular portion, a horizontal portion and a vertical portion, the other end of the bushings comprises a continuously bent Z-shaped portion, a second circular portion and a third circular portion, when adjacent bushings are butt-jointed, the first circular portion at one end is embedded in the Z-shaped portion at the other end, and further comprises: a sealing ring installed in the first circular portion, the second circular portion and the third circular portion, for filling the gap between the bushing and the pipe body; a self-locking part and a connecting bolt, respectively arranged in the vertical portion and the third circular portion, and coaxial; wherein a push plate is slidably installed on a side of the bushing close to the pipe body, the push plate being connected to the self-locking part, for pushing the self-locking part to lock with the connecting bolt.

[0007] In order to automatically complete self-locking through the grouting process, preferably, the self-locking part includes a sleeve, a push cylinder is slidably installed in the sleeve, the push cylinder is located at one end outside the sleeve and is fixedly connected to the push plate, and a connecting pin is coaxially arranged in the push cylinder, and a connecting cover is fixedly installed on one end of the connecting pin close to the connecting bolt, and the inner wall of the connecting cover is provided with a threaded groove compatible with the connecting bolt, wherein a track groove is provided on the outer edge surface of the connecting pin, and a positioning pin is fixedly installed on the push cylinder, and the positioning pin is embedded in the track groove.

[0008] In order to enhance the stability and precise control capability of the system, further, symmetrically arranged restraint blocks are fixedly mounted on both ends of the connection cover, and movable grooves for guiding the movement of the restraint blocks are opened on the inner wall of the sleeve.

[0009] In order to allow the connecting bolt to move within a certain range, a first mounting groove is further provided on a side of the third circular portion close to the vertical portion, and the connecting bolt is slidably installed in the first mounting groove. A first spring is fixedly connected between the connecting bolt and the bottom surface of the first mounting groove.

[0010] In order to ensure correct alignment between adjacent bushings and prevent unnecessary rotation or offset, preferably, the bushing also includes a stopper, which is fixedly mounted on the side of the second circular portion and the third circular portion close to the Z-shaped portion, and a first baffle is fixedly mounted on one side of the stopper, and a second baffle is fixedly mounted on the first circular portion. When the bushing on one side rotates, the first baffle abuts against the second baffle.

[0011] In order to reduce the random shaking of the rear bushing, the first circular portion further includes a limit block, and a second mounting groove is opened on the first circular portion. The limit block is slidably installed in the second mounting groove and is fixedly connected to the bottom surface of the second mounting groove with a second spring. When the first circular portion is embedded in the Z-shaped portion at the other end, the limit block abuts against the stop.

[0012] In order to support the sealing ring and make it fit tightly against the inner wall of the tube body to ensure the sealing effect, the bushing further includes two supporting blocks slidably installed in the second circular portion and the third circular portion, one end of the two supporting blocks passes through the second circular portion and the third circular portion and has a first inclined surface, and the first circular portion and the horizontal portion have a second inclined surface that abuts against the first inclined surface.

[0013] In order to prevent loosening and improve the stability of the overall structure, further, a first anti-slip pad is fixedly installed on the first inclined surface, and a second anti-slip pad is fixedly installed on the first circular portion and the horizontal portion, and the second anti-slip pad is alternately arranged with the second baffle.

[0014] In order to enhance the contact area between the sleeve and the medium and improve the sealing performance, preferably, the sleeve includes a lining layer and a structural layer with a corrugated structure, and an insulating layer is arranged between the lining layer and the structural layer, wherein a reinforcement mesh is laid on the side of the structural layer close to the medium to form a three-dimensional reinforcement structure.

[0015] A splicing lining method for repairing a large-diameter pipeline comprises the following steps:

[0016] Step 1: Prefabricate standardized bushings in the factory based on the actual size and shape of the pipe to be repaired;

[0017] Step 2: Transport the prefabricated bushing to the construction site;

[0018] Step 3: Clean and smooth the inside of the pipe to ensure there is no debris that would hinder installation;

[0019] Step 4: Install the bushings in the predetermined order;

[0020] Step 5: Inject grouting material into the grouting layer through the grouting hole and wait for it to solidify. After solidification, seal the grouting hole with bolts;

[0021] Step 6: Use non-destructive testing technology to conduct quality inspections on key parts to ensure that every link meets the design standards;

[0022] Step 7: Finally, perform system testing to verify whether the repaired pipe body meets the use requirements.

[0023] Compared with the prior art, the present invention provides a spliced ​​lining structure and method for repairing large-diameter pipelines, which has the following beneficial effects:

[0024] 1. This spliced ​​lining structure for large-diameter pipeline repair achieves initial docking between adjacent liners by embedding the first round-shaped portion into the Z-shaped portion. Appropriate grouting material is then injected through the grouting holes to enhance the bond between the liners and the pipe body. As the grouting material is filled, the push plate gradually pushes the self-locking member, which locks it with the connecting bolt, completing the final fixation between the two liners and further enhancing the mechanical connection strength between the liners. During this process, the sealing ring is compressed, filling any small gaps between the liners and the pipe body, providing excellent sealing performance and ensuring the integrity and stability of the entire repair section.

[0025] 2. The large-diameter pipeline repair splicing lining structure, the second bushing may rotate to a certain extent relative to the first bushing due to the uncertainty of the position during installation, the first baffle and the second baffle limit the position, when the first baffle and the second baffle abut, the first installation slot is coaxial with the shaft sleeve, at the same time, the second anti-skid pad contacts the first anti-skid pad, so that the support block is prevented from loosening, and the stability of the overall structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The overall structure of the large-diameter pipeline repair splicing lining structure is shown in the figure Figure 1 ;

[0027] Figure 2 The sectional view of the large-diameter pipeline repair splicing lining structure is shown in the figure

[0028] Figure 3 The sectional view of the large-diameter pipeline repair splicing lining structure is shown in the figure

[0029] Figure 4 The self-locking piece and the engaging bolt position installation of the large-diameter pipeline repair splicing lining structure are shown in the figure

[0030] Figure 5 The self-locking piece structure of the large-diameter pipeline repair splicing lining structure is shown in the figure

[0031] Figure 6 The first baffle and the second baffle installation of the large-diameter pipeline repair splicing lining structure are shown in the figure

[0032] Figure 7 The bushing structure of the large-diameter pipeline repair splicing lining structure is shown in the figure

[0033] Figure 8 The large-diameter pipeline repair splicing lining structure is shown in the figure Figure 2 A structure enlargement schematic view

[0034] Figure 9 The large-diameter pipeline repair splicing lining structure is shown in the figure Figure 2 B structure enlargement schematic view

[0035] In the figure: 1, pipe body

[0036] 2, bushing; 201, grouting hole; 202, first backshaped part; 203, horizontal part; 204, vertical part; 205, Z-shaped part; 206, second backshaped part; 207, third backshaped part; 208, first mounting slot; 209, blocking table; 210, first blocking plate; 211, second blocking plate; 212, second mounting slot; 213, second inclined surface;

[0037] 3, grouting layer;

[0038] 4, self-locking part; 401, shaft sleeve; 402, push cylinder; 403, connecting pin; 404, connecting cover; 405, trajectory slot; 406, positioning pin; 407, constraint block; 408, movable slot;

[0039] 5, connecting bolt; 6, push plate; 7, first spring; 8, limiting block; 9, second spring; 10, sealing ring;

[0040] 11, supporting block; 1101, first inclined surface;

[0041] 12, first anti-skid pad; 13, second anti-skid pad; 14, inner lining layer; 15, structural layer; 16, thermal insulation layer; 17, reinforcing mesh. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] Embodiment 1

[0045] Reference Figures 1-9A spliced ​​lining structure for repairing large-diameter pipelines includes a plurality of bushings 2 arranged axially along the pipe body 1. The number of bushings 2 is determined by the actual length of the pipe section to be repaired. After one bushing 2 is installed, the second bushing 2 can be rotated relative to the previous bushing 2 during installation, thereby achieving position limitation. A grouting layer 3 is provided between the bushing 2 and the pipe body 1. A plurality of grouting holes 201 are provided on the side wall of the bushing 2 to fill the gap between the bushing 2 and the original pipe. The number of grouting holes 201 is 4-6, which are evenly distributed on the bushing 2. Grouting material is injected simultaneously through the grouting device to ensure that the grouting material can fully fill the gap without damaging the bushing 2 due to excessive pressure. One end of the bushing 2 has a continuously bent first round-shaped portion 202, a horizontal portion 203 and a vertical portion 204 to form an integral mechanical lock. Part, the other end of the bushing 2 has a continuously bent Z-shaped portion 205, a second circular portion 206 and a third circular portion 207, which can be nested with the corresponding parts on other bushings 2 and provide a stable mechanical locking effect. When the adjacent bushings 2 are docked, the first circular portion 202 at one end is embedded in the Z-shaped portion 205 at the other end. It also includes: a sealing ring 10 installed in the first circular portion 202, the second circular portion 206 and the third circular portion 207, which is used to fill the gap between the bushing 2 and the tube body 1 to ensure sealing; the self-locking part 4 and the connecting bolt 5 are respectively arranged in the vertical portion 204 and the third circular portion 207, and are coaxial, for achieving a firm connection between adjacent bushings 2; wherein, a push plate 6 is slidably installed on the side of the bushing 2 close to the tube body 1, and the push plate 6 is connected to the self-locking part 4, for pushing the self-locking part 4 and the connecting bolt 5 to lock.

[0046] When repairing a pipeline, the prefabricated bushings 2 are first installed into the pipe body 1 in a predetermined order. The adjacent bushings 2 are preliminarily docked by embedding the first circular portion 202 into the Z-shaped portion 205. Then, appropriate grouting material is injected through the grouting hole 201 to enhance the bonding force between the bushing 2 and the pipe body 1. As the grouting material is filled, the push plate 6 is gradually pushed, and the push plate 6 pushes the self-locking part 4 to lock it with the connecting bolt 5, thereby completing the final fixation between the two bushings 2 and further enhancing the mechanical connection strength between the bushings 2. During this process, the sealing ring 10 is compressed, filling any tiny gap between the bushing 2 and the pipe body 1, providing excellent sealing performance, and ensuring the integrity and stability of the entire repair section.

[0047] Reference Figure 4 and Figure 5Preferably, the self-locking member 4 includes a sleeve 401, a push cylinder 402 is slidably installed in the sleeve 401, and the end of the push cylinder 402 located outside the sleeve 401 is fixedly connected to the push plate 6. The push cylinder 402 is moved back and forth by the operation of the push plate 6, thereby driving the entire self-locking mechanism, and a connecting pin 403 coaxially arranged in the push cylinder 402. The end of the connecting pin 403 close to the connecting bolt 5 is fixedly installed with a connecting cover 404, and the inner wall of the connecting cover 404 is provided with a threaded groove adapted to the connecting bolt 5. When the push cylinder 402 pushes the connecting pin 403 forward, the connecting cover 404 is screwed into the connecting bolt 5 to form a firm mechanical lock. A track groove 405 is provided on the outer edge surface of the connecting pin 403. The track groove 405 is spiral. A positioning pin 406 is fixedly installed on the push cylinder 402. The positioning pin 406 is embedded in the track groove 405 to guide the movement path of the positioning pin 406, ensuring that the connecting pin 403 maintains the correct rotation angle during the advancement process so that it can be smoothly screwed into the connecting bolt 5.

[0048] Furthermore, in order to enhance the stability and precise control capability of the system, symmetrically arranged constraint blocks 407 are fixedly installed at both ends of the connecting cover 404, and a movable groove 408 is provided on the inner wall of the sleeve 401 for guiding the movement of the constraint block 407 to ensure that the connecting cover 404 maintains the correct direction and stability during the advancement process, avoids unnecessary deviation, and thus ensures the correct alignment and movement of the connecting cover 404 and the connecting pin 403.

[0049] Through the arrangement of the above structure, when the grouting material is not poured, the push cylinder 402 is in the retreat position, and the connecting pin 403 and the connecting cover 404 are away from the connecting bolt 5. At this time, the adjacent bushings 2 have not been locked. As the grouting material is poured, the push plate 6 is pressed by force to move the push cylinder 402 to one side. The forward movement of the push cylinder 402 pushes the connecting pin 403 forward until it is blocked by the movable groove 408. Due to the continued advancement of the push cylinder 402, the positioning pin 406 slides along the track groove 405, causing the connecting pin 403 to rotate according to a predetermined angle, causing the connecting cover 404 to gradually approach and finally screw into the threaded hole of the connecting bolt 5 to complete the locking. Once the connecting cover 404 is fully screwed into the connecting bolt 5, the adjacent bushings 2 are firmly locked together to form a continuous and sealed overall structure.

[0050] Reference Figure 4 A first mounting groove 208 is provided on one side of the third circular portion 207 close to the vertical portion 204, and the connecting bolt 5 is slidably installed in the first mounting groove 208. The first mounting groove 208 provides a guiding function and allows the connecting bolt 5 to move within a certain range. A first spring 7 is fixedly connected between the connecting bolt 5 and the bottom surface of the first mounting groove 208. The first spring 7 provides an initial pre-tightening force for the connecting bolt 5 to ensure that it can maintain a certain position when there is no external force, and provides buffering and reset functions during the locking process.

[0051] Through the arrangement of the above structure, the first bushing 2 is installed in place to ensure that its position is correct and stable. At this time, the connecting bolt 5 is maintained in an initial position by the action of the first spring 7. When the second bushing 2 is installed, due to the uncertainty of the position, it may rotate to a certain extent relative to the first bushing 2. During this process, the connecting bolt 5 is compressed in the first mounting groove 208. By adjusting the position of the second bushing 2, the first mounting groove 208 is made coaxial with the shaft sleeve 401, ensuring that the connecting bolt 5 maintains a certain position when there is no external force, and maintains the correct direction and stability with the connecting cover 404 during the advancement process.

[0052] To ensure proper alignment between adjacent bushings 2 and to prevent unwanted rotation or deflection, refer to Figure 9 The bushing 2 also includes a stopper 209, which is fixedly mounted on one side of the second circular portion 206 and the third circular portion 207 close to the Z-shaped portion 205. A first baffle 210 is fixedly mounted on one side of the stopper 209, and a second baffle 211 is fixedly mounted on the first circular portion 202. When one side of the bushing 2 rotates, the first baffle 210 abuts against the second baffle 211 to prevent excessive rotation and ensure precise alignment between adjacent bushings 2. At this time, the first mounting groove 208 is coaxial with the shaft sleeve 401.

[0053] Before the casting material is filled, the installation reliability is reduced due to the random shaking of the rear bushing 2. Furthermore, the first circular portion 202 also includes a limit block 8. A second installation groove 212 is opened on the first circular portion 202. The limit block 8 is slidably installed in the second installation groove 212 and is fixedly connected to the bottom surface of the second installation groove 212 with a second spring 9. When the first circular portion 202 is embedded in the Z-shaped portion 205 at the other end, the limit block 8 abuts against the stop 209.

[0054] It should be noted that the cross section of the stop 209 is a right-angled trapezoid. When the first circular portion 202 is accurately embedded in the Z-shaped portion 205, the limit block 8 fits with the right-angled side of the stop 209 to prevent it from falling back.

[0055] Through the arrangement of the above structure, when the second bushing 2 is installed, its first circular portion 202 is embedded in the Z-shaped portion 205 of the first bushing 2. When the first circular portion 202 is embedded in the Z-shaped portion 205, the limit block 8 fits with the right-angle side of the stop platform 209, ensuring that the first circular portion 202 is accurately embedded in the Z-shaped portion 205 and prevents retreat, thereby realizing a preliminary positioning function. Due to the uncertainty of the position, the second bushing 2 may rotate to a certain extent relative to the first bushing 2 during installation. During this process, the first baffle 210 and the second baffle 211 play a limiting role. When the first baffle 210 abuts the second baffle 211, the first mounting groove 208 is coaxial with the shaft sleeve 401.

[0056] Reference Figure 9 The bushing 2 also includes two supporting blocks 11 slidably mounted in the second circular portion 206 and the third circular portion 207 for supporting the sealing ring 10. One end of the two supporting blocks 11 passes through the second circular portion 206 and the third circular portion 207 and has a first inclined surface 1101. The first circular portion 202 and the horizontal portion 203 have a second inclined surface 213 that abuts against the first inclined surface 1101.

[0057] Through the arrangement of the above structure, when the first circular portion 202 is embedded in the Z-shaped portion 205, the first circular portion 202 and the second inclined surface 213 on the horizontal portion 203 squeeze the first inclined surfaces 1101 on the two supporting blocks 11, causing the two supporting blocks 11 to form an upward linear motion, thereby supporting the sealing ring 10, so that the sealing ring 10 is tightly attached to the inner wall of the tube body 1, ensuring the sealing effect.

[0058] Reference Figure 4 and Figure 6 A first anti-slip pad 12 is fixedly mounted on the first inclined surface 1101 , and a second anti-slip pad 13 is fixedly mounted on the first circular portion 202 and the horizontal portion 203 . The second anti-slip pad 13 and the second baffle 211 are alternately arranged.

[0059] Through the arrangement of the above structure, due to the rotatability of the second bushing 2 during installation, in the initial stage, the second anti-slip pad 13 located on the first circular portion 202 and the horizontal portion 203 does not contact the first anti-slip pad 12 on the first inclined surface 1101, so that the friction of the second bushing 2 is minimized during rotation. When the first baffle 210 and the second baffle 211 contact, the second anti-slip pad 13 contacts the first anti-slip pad 12, thereby preventing loosening and improving the stability of the overall structure.

[0060] Example 2:

[0061] Reference Figure 7 The bushing 2 includes a corrugated inner lining layer 14 and a structural layer 15. The corrugated structure can adapt to the dimensional changes of the pipeline caused by temperature changes, foundation settlement and other reasons. The corrugated structure can also enhance the contact area between the inner lining layer 14 and the medium, and improve the sealing performance. An insulating layer 16 is provided between the inner lining layer 14 and the structural layer 15 to reduce heat transfer and prevent condensation or other thermal effects caused by excessive temperature differences between the inside and outside of the pipeline. The insulating layer 16 can be made of high-efficiency thermal insulation materials such as polyurethane foam and rock wool. A reinforcement mesh 17 is laid on the side of the structural layer 15 close to the medium. The reinforcement mesh 17 is usually woven from metal wire or high-strength fiber, and can provide additional support in multiple directions to form a three-dimensional reinforcement structure.

[0062] A splicing lining method for repairing a large-diameter pipeline comprises the following steps:

[0063] Step 1: On-site investigation and assessment:

[0064] Conduct detailed on-site inspections of the pipeline to be repaired, recording the location and extent of damage and specific parameters of the pipeline;

[0065] Step 2: Material preparation:

[0066] Prefabricate the required bushings 2 according to the design plan, ensuring that each bushing 2 includes a corrugated inner lining layer 14, an insulating layer 16, and a structural layer 15, and lay a reinforcement mesh 17 on the side of the structural layer 15 close to the medium;

[0067] Step 3: Cleaning and leveling:

[0068] Clean the inside of the pipe to ensure that there is no debris that hinders the installation, and perform necessary leveling on the pipe wall;

[0069] Apply appropriate primer or adhesive to enhance adhesion between the lining and the original pipe;

[0070] Step 4: Install the first bushing 2:

[0071] Install the first bushing 2 into the pipe body 1 according to the predetermined order, ensuring that it is positioned correctly and stably;

[0072] A first mounting groove 208 is formed on one side of the third circular portion 207 close to the vertical portion 204. The connecting bolt 5 is slidably mounted in the first mounting groove 208 and is held in an initial position by the first spring 7.

[0073] Second bushing 2 installation:

[0074] Install the second bushing 2 so that its first round-shaped portion 202 is embedded in the Z-shaped portion 205 of the first bushing 2;

[0075] During this process, the first inclined surface 1101 of the support block 11 begins to contact and gradually abuts against the first circular portion 202 and the second inclined surface 213 on the horizontal portion 203, ensuring precise alignment between adjacent bushings 2;

[0076] The limiting block 8 is fitted with the right-angled edge of the stop 209 to prevent the return and ensure that the first circular portion 202 is accurately embedded in the Z-shaped portion 205;

[0077] Self-locking lock:

[0078] Push the push plate 6, which drives the push cylinder 402 to move forward. The forward movement of the push cylinder 402 pushes the connecting pin 403 forward until it is blocked by the movable groove 408;

[0079] The positioning pin 406 slides along the track groove 405, causing the connecting pin 403 to rotate according to a predetermined angle, causing the connecting cover 404 to gradually approach and eventually screw into the connecting bolt 5, completing the locking;

[0080] The first anti-slip pad 12 and the second anti-slip pad 13 ensure close contact between the first inclined surface 1101 and the second inclined surface 213 to prevent loosening and improve the stability of the overall structure;

[0081] Step 5: Grouting filling:

[0082] Inject an appropriate amount of grouting material into the grouting layer 3 through the grouting holes 201 to ensure that the filling is sufficient and uniform;

[0083] Control the grouting pressure to avoid damage to the bushing 2 due to excessive pressure. Usually, multiple points are injected simultaneously to ensure that the grouting material can fully fill the gaps without affecting the structure of the bushing 2 due to excessive pressure.

[0084] Step 6: Quality inspection and acceptance:

[0085] Use special equipment to test the tightness of the repaired pipeline section to ensure there is no leakage;

[0086] Air tightness test, water pressure test and other methods can be used to verify the repair effect.

[0087] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spliced ​​lining structure for repairing a large-diameter pipeline, comprising a plurality of bushings (2) arranged axially along a pipe body (1), a grouting layer (3) being provided between the bushings (2) and the pipe body (1), and a plurality of grouting holes (201) being provided on the side wall of the bushing (2), characterized in that: One end of the bushing (2) has a first circular portion (202) that is continuously bent, a horizontal portion (203) and a vertical portion (204), and the other end of the bushing (2) has a Z-shaped portion (205) that is continuously bent, a second circular portion (206) and a third circular portion (207). When adjacent bushings (2) are butt-jointed, the first circular portion (202) at one end is embedded in the Z-shaped portion (205) at the other end. The bushing further comprises: A sealing ring (10) installed in the first circular portion (202), the second circular portion (206) and the third circular portion (207) is used to fill the gap between the bushing (2) and the pipe body (1); The self-locking member (4) and the connecting bolt (5) are respectively arranged in the vertical portion (204) and the third circular portion (207) and are coaxial; A push plate (6) is slidably mounted on one side of the bushing (2) close to the tube body (1), and the push plate (6) is connected to the self-locking part (4) and is used to push the self-locking part (4) and lock it with the connecting bolt (5).

2. A spliced ​​lining structure for repairing large-diameter pipelines according to claim 1, characterized in that: The self-locking member (4) includes a shaft sleeve (401), a push cylinder (402) is slidably mounted in the shaft sleeve (401), and one end of the push cylinder (402) located outside the shaft sleeve (401) is fixedly connected to the push plate (6), and A connecting pin (403) is coaxially arranged in the push cylinder (402), and a connecting cover (404) is fixedly installed at one end of the connecting pin (403) close to the connecting bolt (5). The inner wall of the connecting cover (404) is provided with a threaded groove adapted to the connecting bolt (5). A track groove (405) is provided on the outer edge surface of the connecting pin (403), and a positioning pin (406) is fixedly installed on the push cylinder (402), and the positioning pin (406) is embedded in the track groove (405).

3. A spliced ​​lining structure for repairing large-diameter pipelines according to claim 2, characterized in that: Symmetrically arranged restraining blocks (407) are fixedly mounted on both ends of the connecting cover (404), and a movable groove (408) for guiding the movement of the restraining blocks (407) is provided on the inner wall of the shaft sleeve (401).

4. The spliced ​​lining structure for repairing a large-diameter pipeline according to claim 2, characterized in that: A first mounting groove (208) is provided on a side of the third circular portion (207) close to the vertical portion (204), and the connecting bolt (5) is slidably installed in the first mounting groove (208). A first spring (7) is fixedly connected between the connecting bolt (5) and the bottom surface of the first mounting groove (208).

5. The spliced ​​lining structure for repairing a large-diameter pipeline according to claim 1, characterized in that: The bushing (2) further comprises a stopper (209) fixedly mounted on one side of the second circular portion (206) and the third circular portion (207) close to the Z-shaped portion (205); a first baffle (210) is fixedly mounted on one side of the stopper (209); a second baffle (211) is fixedly mounted on the first circular portion (202); and when the bushing (2) on one side rotates, the first baffle (210) abuts against the second baffle (211).

6. A spliced ​​lining structure for repairing large-diameter pipelines according to claim 5, characterized in that: The first circular portion (202) further includes a limit block (8). A second mounting groove (212) is provided on the first circular portion (202). The limit block (8) is slidably mounted in the second mounting groove (212) and a second spring (9) is fixedly connected to the bottom surface of the second mounting groove (212). When the first circular portion (202) is embedded in the Z-shaped portion (205) at the other end, the limit block (8) abuts against the stopper (209).

7. The spliced ​​lining structure for repairing a large-diameter pipeline according to claim 5, characterized in that: The bushing (2) further comprises two supporting blocks (11) slidably mounted in the second circular portion (206) and the third circular portion (207), one end of the two supporting blocks (11) passing through the second circular portion (206) and the third circular portion (207) and having a first inclined surface (1101), and the first circular portion (202) and the horizontal portion (203) have a second inclined surface (213) abutting against the first inclined surface (1101).

8. The spliced ​​lining structure for repairing a large-diameter pipeline according to claim 7, characterized in that: A first anti-slip pad (12) is fixedly mounted on the first inclined surface (1101), and a second anti-slip pad (13) is fixedly mounted on the first circular portion (202) and the horizontal portion (203). The second anti-slip pad (13) and the second baffle (211) are alternately arranged.

9. The spliced ​​lining structure for repairing a large-diameter pipeline according to claim 1, characterized in that: The liner (2) comprises a corrugated inner lining layer (14) and a structural layer (15), wherein a heat insulating layer (16) is provided between the inner lining layer (14) and the structural layer (15). Wherein, a reinforcement mesh (17) is laid on a side of the structural layer (15) close to the medium to form a three-dimensional reinforcement structure.

10. A splicing lining method for repairing a large-diameter pipeline, using a splicing lining structure for repairing a large-diameter pipeline according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: prefabricate a standardized bushing (2) in a factory according to the actual size and shape of the pipe body (1) to be repaired; Step 2: transporting the prefabricated bushing (2) to the construction site; Step 3: Clean and smooth the inside of the tube body (1) to ensure that there is no debris that would hinder installation; Step 4: Install the bushings (2) in sequence according to a predetermined order; Step 5: injecting grouting material into the grouting layer (3) through the grouting hole (201) and waiting for solidification, and sealing the grouting hole (201) with bolts after solidification; Step 6: Use non-destructive testing technology to conduct quality inspections on key parts to ensure that every link meets the design standards; Step 7: Finally, perform a system test to verify whether the repaired pipe body (1) meets the use requirements.

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