A device and method for correcting deviation of a steel pipe inside a recycled water top pipe

Abstract

This invention discloses a device and method for correcting the deviation of steel pipes inserted into reclaimed water jacking systems, belonging to the field of municipal pipeline construction technology. The device includes an anti-deviation mechanism at the opening, an internal fixed guiding mechanism, and a front-end hydraulic correction mechanism. The anti-deviation mechanism is located at the inlet end of the concrete pipe to constrain the radial displacement of the inlet end of the steel pipe. The internal fixed guiding mechanism is fixed at intervals to the inner wall of the concrete pipe, forming a guiding channel through limiting pulleys arranged on the inner wall to maintain the coaxiality of the steel pipe. The front-end hydraulic correction mechanism is assembled at the front end of the steel pipe, using a hydraulic pump to drive a slider and a linkage mechanism to raise and lower a lifting plate, dynamically adjusting the posture of the front end of the steel pipe. This invention solves the technical problems of difficulty in controlling the concentricity of steel pipes inserted into long-distance jacking systems, easy damage to the external anti-corrosion layer, and inability to adapt to curved sections in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of municipal pipeline construction technology, specifically relating to a device and method for correcting deviation of steel pipes inside a reclaimed water jacking pipe. Background Technology

[0002] In underground pipeline projects for municipal reclaimed water transportation and water supply and drainage, a composite pipeline structure of "concrete jacking outer casing + internal steel pipe" is widely adopted to balance the advantages of trenchless construction with the pressure-bearing and seepage-proof performance of the pipeline. However, during actual long-distance jacking construction with the steel pipe inside, the significant weight of the steel pipe makes it prone to vertical sag and horizontal displacement during the jacking process, making it difficult to maintain concentricity between the inner steel pipe and the outer concrete casing. This not only damages the anti-corrosion layer of the steel pipe due to abrasion but also affects the installation accuracy and closure quality of subsequent pipe fittings in the working shaft due to uneven thickness of the filling material between pipes, ultimately reducing the overall insulation effect and structural load-bearing capacity of the pipeline.

[0003] Currently, conventional internal pipe-laying construction often employs a back wall support combined with jacks for jacking, supplemented by simple clamping rollers for local support and guidance. However, this existing technology has significant shortcomings: First, it lacks a systematic multi-level limiting and correction structure, making it impossible to achieve coaxial control of the entire process from the pipe inlet end to the pipe body and the advancing end; second, existing guiding devices are mostly fixed rollers, which can only provide passive limiting and cannot dynamically adjust the pipe's posture based on construction monitoring data. Especially in pipe-laying operations on curved sections, fixed guiding structures are prone to causing pipe jamming and scratching damage to the external anti-corrosion layer, resulting in poor construction adaptability and difficulty in meeting the actual application needs of complex working conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for correcting the concentricity of steel pipes inside a long-distance pipe jacking project, which can solve the technical problems in related technologies, such as the difficulty in controlling the concentricity of steel pipes inside long-distance pipe jacking, the easy damage to the external anti-corrosion layer, and the inability to adapt to the construction of curved sections.

[0005] In a first aspect, the present invention provides a device for correcting the deviation of a steel pipe inside a reclaimed water jacking pipe, for coaxially inserting the steel pipe inside a concrete pipe, including an anti-deviation mechanism at the opening, a fixed guide mechanism inside the pipe, and a front-end hydraulic correction mechanism. The anti-deviation mechanism for the opening includes a fixed block, which is set at the inlet end of the concrete pipe. A second adjusting bolt passes through the fixed block along the radial direction of the concrete pipe and is threadedly connected to the fixed block. The end of the second adjusting bolt facing the inside of the pipe is connected to a limit seat, and a second pulley is installed on the limit seat that abuts against the outer wall of the inner through steel pipe. The pipe fixing guide mechanism includes a fixing plate, which is arranged in several sets along the axial direction of the concrete pipe on the inner wall of the concrete pipe. Limiting wheels are installed on the fixing plate, and the limiting wheels make rolling contact with the outer wall of the inner steel pipe. The front-end hydraulic correction mechanism is located at the front end of the inner steel pipe and includes a frame and a lifting plate. The bottom of the frame is equipped with a first pulley that rolls and fits against the inner wall of the concrete pipe. The top of the frame is equipped with a mounting seat. Two sets of hydraulic pumps are symmetrically arranged at the front end of the mounting seat. The top of the mounting seat has two parallel cross grooves. A slider is installed inside the cross groove. The piston rod of the hydraulic pump extends into the cross groove and is connected to the slider. Four connecting rods are hinged to the bottom of the lifting plate. The lower ends of two connecting rods are hinged to the top surface of the mounting seat, and the lower ends of the other two connecting rods are correspondingly hinged to the two sliders. The hydraulic pump drives the slider to slide along the cross groove, and the connecting rods drive the lifting plate to rise or tilt to adjust the radial position of the front end of the inner steel pipe.

[0006] As a further implementation, the anti-deviation mechanism for the opening includes two sets of fixing blocks. The two sets of fixing blocks are arranged circumferentially along the inlet end face of the concrete pipe. The limiting seat is adapted to the arc shape of the outer wall of the inner steel pipe. At least one set of second pulleys is installed on each limiting seat. Rotating the second adjusting bolt can drive the second pulleys to move synchronously in the radial direction to adapt to inner steel pipes of different diameters and adjust the pre-tightness between the second pulleys and the outer wall of the steel pipe.

[0007] As a further implementation, each set of pipe-mounted guide mechanisms includes multiple fixing plates, which are equidistantly distributed along the inner wall of the concrete pipe. Each set of pipe-mounted guide mechanisms is evenly arranged along the axial direction of the concrete pipe at a set interval. The wheel surface of the limiting wheel makes flexible rolling contact with the outer wall of the inner steel pipe, which is used to evenly transfer the weight of the inner steel pipe to the inner wall of the concrete pipe.

[0008] As a further implementation, the front-end hydraulic correction mechanism also includes an insertion plate, a threaded sleeve, and a first adjusting bolt. The insertion plate has a slot adapted to the wall thickness of the end of the inner steel pipe. The front edge of the inner steel pipe is engaged in the slot. Two sets of threaded sleeves are symmetrically arranged on both sides of the insertion plate. The first adjusting bolt passes through the threaded sleeve and is threadedly connected to the threaded sleeve. Rotating the first adjusting bolt can press its end against the wall of the inner steel pipe.

[0009] As a further implementation, the hydraulic pump is equipped with a drive linkage rod, which provides power to the hydraulic pump by reciprocating the drive linkage rod to drive the piston rod to extend and retract; the lifting plate is adapted to the arc shape of the outer wall of the inner steel pipe, and the cross groove extends along the axial direction of the concrete pipe. When the slider slides along the cross groove, the horizontal displacement is converted into the lifting or tilting of the lifting plate through the linkage rod.

[0010] As a further implementation, the surfaces of the first pulley, the second pulley, and the limiting wheel are all made of wear-resistant and flexible material.

[0011] As a further implementation, the two sets of hydraulic pumps can independently control the extension and retraction of the piston rod. By adjusting the different displacements of the sliders on both sides, the lifting plate can be raised or lowered or tilted laterally to adapt to the pipe-threading operation of the concrete pipe in the curved section.

[0012] As a further implementation, the fixing block is fastened to the inlet end face of the concrete pipe by expansion bolts; the limiting seat is rotatably connected to the end of the second adjusting bolt by bearings.

[0013] As a further implementation, each set of pipe-mounted guide mechanisms includes four fixing plates. The four fixing plates are evenly distributed at 90-degree intervals along the inner wall of the concrete pipe. Each fixing plate is fixed to the inner wall of the concrete pipe by expansion bolts. The limiting wheel is installed on the end of the fixing plate facing the center of the pipe by rotating through the wheel axle.

[0014] A second aspect of the present invention provides a method for correcting the deviation of a steel pipe inserted into a reclaimed water jacking pipe, based on the steel pipe correction device for reclaimed water jacking pipes described in the first aspect of the present invention, comprising the following steps: Installation steps: Install an anti-deviation mechanism at the inlet end of the concrete pipe, install multiple sets of pipe-fixed guide mechanisms on the inner wall of the pipe at set intervals along the axial direction of the concrete pipe, and assemble a front-end hydraulic correction mechanism at the front end of the first section of the inner steel pipe to fix the front-end hydraulic correction mechanism to the inner steel pipe. Entry limiting procedure: Tighten the second adjusting bolt to drive the limiting seat to move radially, so that the wheel surface of the second pulley abuts against the outer wall of the inner steel pipe, and the radial displacement of the inlet end of the inner steel pipe is constrained by the circumferentially symmetrically arranged second pulleys. The jacking and guiding steps are as follows: Start the jacking equipment to drive the inner steel pipe into the concrete pipe, so that the inner steel pipe passes through each set of fixed guide mechanisms in sequence. Each set of limit wheels rolls in contact with the outer wall of the inner steel pipe, continuously maintaining the coaxial state of the inner steel pipe and the concrete pipe, while evenly transferring the weight of the steel pipe to the inner wall of the concrete pipe. Dynamic correction steps: During the movement of the inner steel pipe, the center position coordinates of the front end of the steel pipe are monitored in real time. Based on the monitoring data, the piston rod extension and retraction of the hydraulic pumps on both sides are controlled to drive the slider to slide along the cross groove. Through the linkage rod, the lifting plate is raised or tilted to adjust the elevation and horizontal position of the front end of the inner steel pipe and correct the steel pipe offset. Repeat the above jacking guidance steps and dynamic correction steps until all the internal steel pipes have been jacked up.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention discloses a device and method for correcting the concentricity of steel pipes inserted into a reclaimed water pipe jacking system. By constructing a three-level segmented limiting system consisting of "entrance limiting + multi-point guidance within the pipe + dynamic correction at the front end," and utilizing the coordinated operation of fixed constraint devices and dynamic correction devices, the coaxiality of the steel pipe is controlled throughout the entire installation process. This effectively solves the problem of controlling the concentricity of steel pipes inserted into long-distance pipe jacking construction, preventing the steel pipe from eccentrically sagging and ensuring the uniformity of subsequent inter-pipe filling materials and the overall construction quality of the pipeline. Simultaneously, all guide components in contact with the steel pipe adopt a flexible roller structure, transforming traditional hard-contact sliding friction into flexible rolling friction. This not only significantly reduces the resistance of the steel pipe during insertion and the energy consumption of the jacking equipment, but also effectively prevents damage to the anti-corrosion coating on the outer wall of the steel pipe. Most importantly, the front-end hydraulic correction mechanism adopts a dual-pump independent control structure, which can adjust the height of the supports on both sides according to construction monitoring data, dynamically correcting the elevation and horizontal offset of the front end of the steel pipe. Furthermore, it adapts to the curvature of curved pipeline sections through the extension and retraction of a single-sided cylinder, effectively avoiding pipe jamming issues and significantly improving the device's adaptability to different pipeline conditions. In addition, each mechanism adopts a modular assembly structure, facilitating flexible adjustment of the layout spacing and quantity on-site according to the pipeline length, resulting in extremely high construction convenience and promotional value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a steel pipe straightening device for reclaimed water jacking, as disclosed in an embodiment of the present invention. Figure 2 This is an isometric schematic diagram of the layout structure disclosed in an embodiment of the present invention; Figure 3 This is a schematic diagram of the anti-deviation mechanism for openings disclosed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the front-end hydraulic correction mechanism disclosed in the embodiment of the present invention (bottom view); Figure 5 This is a top view of the front-end hydraulic correction mechanism disclosed in an embodiment of the present invention.

[0017] The components are as follows: 1. Concrete pipe; 2. Inner steel pipe; 3. Fixing block; 4. Frame; 5. First pulley; 6. Hydraulic pump; 7. Connecting rod; 8. Cross groove; 9. Sliding block; 10. Connecting rod; 11. Lifting plate; 12. Threaded sleeve; 13. First adjusting bolt; 14. Insertion plate; 15. Limiting seat; 16. Second pulley; 17. Second adjusting bolt; 18. Fixing plate; 19. Limiting wheel; 20. Mounting seat. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0020] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a device for correcting the deviation of a steel pipe inside a reclaimed water jacking pipe, used to coaxially insert the steel pipe 2 inside a concrete pipe 1. The device mainly includes three types of functional mechanisms that work together: an anti-deviation mechanism at the inlet end of the concrete pipe 1, multiple sets of pipe fixing and guiding mechanisms arranged at intervals along the axial direction of the concrete pipe 1 on its inner wall, and a front-end hydraulic correction mechanism assembled at the front end of the steel pipe 2.

[0021] like Figure 1 and Figure 3 As shown, the anti-deviation mechanism at the opening is located at the starting end of the concrete pipe 1, serving as the first limiting barrier for the inner steel pipe 2 entering the jacking pipe opening. It is typically installed inside the pre-embedded steel casing of the caisson. Specifically, the mechanism includes two sets of fixing blocks 3, a second adjusting bolt 17, a limiting seat 15, and a second pulley 16. The two sets of fixing blocks 3 are radially symmetrically arranged along the end face of the concrete pipe 1's inlet and are fastened to the inlet end face of the concrete pipe 1 with expansion bolts, providing a stable installation foundation for the entire mechanism. Each fixing block 3 has a threaded through hole radially opened inside the concrete pipe 1. The second adjusting bolt 17 passes through this threaded through hole and forms a threaded transmission engagement with the fixing block 3. The end of the second adjusting bolt 17 facing the inside of the concrete pipe 1 is rotatably connected to the limiting seat 15 via a bearing or similar rotating connector, ensuring that the limiting seat 15 does not rotate when moving radially with the bolt. The limiting seat 15 is designed as an arc-shaped plate structure that adapts to the curvature of the outer wall of the inner steel pipe 2. At least one set of second pulleys 16 are installed on its inner concave surface via axles. During the construction preparation stage, the operator can precisely drive the second pulleys 16 to move radially inward or outward along the concrete pipe 1 by tightening the second adjusting bolt 17, thereby ensuring that the wheel surfaces of the two symmetrically arranged sets of second pulleys 16 are tightly and symmetrically abutted against the outer wall of the inner steel pipe 2. This embracing constraint structure can effectively limit the vertical and horizontal radial displacement of the inner steel pipe 2 at the entrance end, ensuring that the steel pipe starts to advance in the correct posture.

[0022] like Figure 2As shown, the internal pipe fixing guide mechanism is a fixed guide assembly, fixed to the inner wall of the concrete pipe 1 along the axial direction of the concrete pipe 1 at a preset interval (e.g., every few meters). Each set of internal pipe fixing guide mechanisms includes multiple fixing plates 18 and limiting wheels 19 mounted on them. In this embodiment, each set of mechanisms preferably includes four fixing plates 18, which are evenly distributed at equal angles (e.g., at 90-degree intervals) along the circumference of the inner wall of the concrete pipe 1, and are firmly fixed to the inner wall of the concrete pipe 1 by expansion bolts. Each fixing plate 18 extends approximately radially, and a wheel seat is provided at one end facing the center of the pipe. The limiting wheels 19 are rotatably mounted on the wheel seat via a wheel axle. The wheel surfaces of all the limiting wheels 19 together form an annular guide channel coaxial with the theoretical center of the concrete pipe 1. The inner steel pipe 2 passes through this annular channel during the jacking process, and the wheel surfaces of the limiting wheels 19 form rolling contact with the outer wall of the inner steel pipe 2. When the steel pipe tends to shift due to its own weight or uneven jacking force, the limiting wheel 19 located in the direction of shift will press against the outer wall of the steel pipe, providing a reaction force to limit its continued shift, thereby maintaining the coaxial state of the inner steel pipe 2 and the concrete pipe 1. At the same time, the limiting wheels 19, which are distributed at multiple points, can evenly transfer the self-weight load of the long-distance steel pipe to the inner wall of the concrete pipe 1, avoiding damage to the outer anti-corrosion layer of the steel pipe due to excessive stress on a single point of support or excessive local pressure on the pipe wall.

[0023] like Figure 1 , Figure 4 and Figure 5As shown, the front-end hydraulic correction mechanism, as the active correction execution unit, is integrally assembled at the front end of the inner steel pipe 2 and moves forward together with the steel pipe. This mechanism specifically includes a frame 4, first pulleys 5, a mounting base 20, a hydraulic pump 6, a slider 9, a connecting rod 10, and a lifting plate 11. The frame 4 serves as the load-bearing skeleton of the entire mechanism. Multiple first pulleys 5 are rotatably mounted on its bottom via axles. The first pulleys 5 roll and adhere to the bottom of the inner wall of the concrete pipe 1, providing walking support and bearing the weight of the mechanism. The mounting base 20 is fixedly connected to the top of the frame 4, and two sets of hydraulic pumps 6 are symmetrically fixedly mounted on the front end of the mounting base 20. To adapt to the construction environment without external power and air supply inside the pipe, each hydraulic pump 6 is equipped with a manual drive linkage 7. One end of the drive linkage 7 is connected to the plunger inside the hydraulic pump 6. By reciprocating along the plunger axis, the drive linkage 7 inputs reciprocating mechanical energy to the hydraulic pump 6, causing the hydraulic pump 6 to output pressurized oil, which in turn drives the piston rod in the cylinder connected to the hydraulic pump 6 to complete the extension and retraction action. The drive linkage 7 is directly configured (integrated) on the hydraulic pump 6, serving as the manual drive end of the hydraulic pump and forming an integrated power input connection with the hydraulic pump. Its power transmission path is as follows: reciprocating motion of the drive linkage 7 → hydraulic pump 6 generates hydraulic power → piston rod extension and retraction → slider 9 slides along the cross groove 8 → linkage 10 swings → lifting plate 11 rises / falls / tilts. Each of the two sets of hydraulic pumps 6 is equipped with a set of drive linkage 7, which can be operated independently, thereby realizing independent control of the extension and retraction of the piston rods on both sides, so that the lifting plate 11 can be raised or lowered as a whole or tilted on one side to adapt to the pipe-threading operation on curved sections.

[0024] The top surface of the mounting base 20 has two parallel cross grooves 8 (or T-grooves) extending axially along the concrete pipe 1. A slider 9 is slidably embedded in each cross groove 8, forming a clearance fit with the cross groove 8, and can only slide back and forth in the axial direction. The slider 9 is a cross-shaped (or T-shaped) block part adapted to the cross section of the cross groove 8: the main body of the slider 9 is located in the wide cavity of the cross groove 8, and its left and right sides form flanges that rest on the shoulders of the cross groove 8; the top of the slider 9 has a connecting part (such as a hinge lug or pin hole) that extends from the narrow opening of the cross groove 8 for hinged connection with the lower end of the connecting rod 10. The slider 9 and the cross groove 8 are in a clearance fit, with the width of the slider 9 slightly smaller than the groove width of the cross groove 8, ensuring that the slider 9 can smoothly reciprocate along the groove length direction (axial direction). A small gap exists between the flange of the slider 9 and the shoulder of the cross groove 8, allowing sliding while restricting the vertical movement of the slider 9. The bottom surface of the slider 9 and the bottom of the groove form a sliding contact surface, which can be lubricated to reduce frictional resistance. The cross groove 8 provides five-sided constraints on the slider 9 (bottom surface, left and right sides, and upper and lower surfaces of the shoulder), releasing only one degree of freedom of movement along the groove length direction (axial direction). Therefore, the slider 9 can only perform axial reciprocating linear motion along the cross groove 8 and cannot undergo vertical disengagement, lateral offset, or rotation.

[0025] The piston rod ends of the two sets of hydraulic pumps 6 extend into the corresponding cross grooves 8 and are fixedly connected to the sliders 9. A support plate 11 for supporting the inner steel pipe 2 is provided above the mounting base 20. This support plate 11 has an arc-shaped concave surface adapted to the outer wall of the inner steel pipe 2 to increase the contact area and avoid stress concentration. Four connecting rods 10 are hinged to the bottom of the support plate 11 via pins. The lower ends of two connecting rods 10 serve as fixed ends and are hinged to the fixed supports on the top surface of the mounting base 20; the lower ends of the other two connecting rods 10 serve as movable ends and are respectively hinged to the two sliders 9. The hinge points of the four connecting rods 10 at the bottom of the lifting plate 11 are all located on the same horizontal plane (transverse plane) of the bottom surface of the lifting plate 11, and are distributed in the form of a rectangle at the four corners, that is: divided into two rows along the axial direction (front and back) of the concrete pipe, and into two columns along the horizontal radial direction (left and right), and the four hinge points are: left front point, left rear point, right front point, and right rear point. The four points are arranged in a rectangle in the same plane, and the front-to-back spacing and left-to-right spacing are determined according to the size of the lifting plate 11 and the linkage transmission ratio to ensure that the four connecting rods 10 are subjected to uniform force and the transmission is stable. Thus, the mounting base 20, the slider 9, the connecting rods 10 and the lifting plate 11 together constitute a parallelogram linkage mechanism.

[0026] When the piston rod of the hydraulic pump 6 extends or retracts, it drives the slider 9 to slide horizontally along the cross groove 8. Since the length of the connecting rod 10 is fixed, the horizontal displacement of the slider 9 forces the connecting rod 10, which is hinged to it, to swing, thereby converting the horizontal motion into the vertical lifting motion of the lifting plate 11. By precisely controlling the feed amount of the hydraulic pumps 6 on both sides, the displacement of the two sliders 9 can be adjusted independently, thereby realizing the lifting of the lifting plate 11 on one side or the overall lifting, and ultimately achieving the purpose of adjusting the radial position (including elevation and inclination) of the front end of the inner steel pipe 2 supported on it.

[0027] Furthermore, to achieve a stable connection between the front-end hydraulic correction mechanism and the front end of the inner steel pipe 2, the mechanism also includes an insertion plate 14, a threaded sleeve 12, and a first adjusting bolt 13. The insertion plate 14 is fixedly connected to the front end of the frame 4, and has an annular groove that matches the wall thickness of the end of the inner steel pipe 2. During installation, the front edge of the inner steel pipe 2 is inserted into the groove to achieve initial axial and radial positioning. Two threaded sleeves 12 are symmetrically fixedly connected to the left and right sides of the insertion plate 14, and a first adjusting bolt 13 passes through each threaded sleeve 12. After the end of the inner steel pipe 2 is inserted into the groove, the first adjusting bolt 13 is screwed on so that the end of its screw passes through the threaded sleeve 12 and presses tightly against the inner or outer wall of the inner steel pipe 2. Thus, the entire front-end hydraulic correction mechanism is firmly locked to the front end of the inner steel pipe 2 through friction and clamping force, ensuring that the two can move synchronously during the jacking process.

[0028] In the above embodiments, in order to maximize the protection of the anti-corrosion layer on the outer wall of the inner steel pipe 2 and reduce the resistance to passage, the wheel surfaces of the first pulley 5, the second pulley 16, and the limiting wheel 19 are preferably made of high-strength, wear-resistant, and flexible materials, such as polyurethane or high-strength nylon. When these materials come into contact with the outer wall of the steel pipe, on the one hand, they can transform the original sliding friction into rolling friction, greatly reducing the coefficient of friction and reducing the load on the jacking equipment; on the other hand, their flexible contact characteristics can effectively avoid scratching or indenting the anti-corrosion coating on the outer wall of the steel pipe.

[0029] Specifically, the two sets of hydraulic pumps 6 can be controlled completely independently. During construction on straight sections, the two sets of hydraulic pumps 6 can be controlled to extend and retract synchronously, allowing the lifting plate 11 to rise and fall vertically as a whole to adjust the center height of the steel pipe. When encountering a curved section of concrete pipe, the hydraulic pump 6 on the inside of the curve can be controlled to retract and the hydraulic pump 6 on the outside of the curve to extend (or vice versa) according to the preset turning radius and real-time monitoring data, causing the lifting plate 11 to tilt laterally or move laterally, thereby guiding the rigid inner steel pipe 2 to smoothly conform to the turning arc of the concrete pipe 1, effectively preventing the steel pipe from getting stuck at the bend.

[0030] The working principle of this device will be explained in detail below: Before construction begins, the device is first installed and debugged. The first step is to install the anti-deviation mechanism at the opening: two sets of fixing blocks 3 are symmetrically fixed to the end face of the concrete pipe 1 inlet using expansion bolts. The second adjusting bolt 17 is initially tightened so that the diameter formed by the second pulley 16 is slightly larger than the outer diameter of the inner steel pipe 2. The second step is to install the pipe-mounted guide mechanism: according to the total length of the concrete pipe 1, installation points are marked sequentially on the inner wall of the pipe section at pre-designed intervals. Multiple sets of fixing plates 18 and limiting wheels 19 are circumferentially and evenly fixed to the inner wall of the pipe using expansion bolts, ensuring that the center line of the guide channel formed by all limiting wheels 19 coincides with the designed center line of the concrete pipe 1. The third step is to assemble the front-end hydraulic correction mechanism: the front edge of the first inner steel pipe 2 is inserted into the slot of the insertion plate 14, and the first adjusting bolts 13 on both sides are tightened to rigidly connect the mechanism to the end of the steel pipe. Then, by pushing and pulling the linkage rod 7, the height of the lifting plate 11 is initially adjusted so that its arc-shaped concave surface fits exactly against the bottom of the steel pipe, and the front end of the steel pipe is adjusted to the theoretical center position.

[0031] After the jacking equipment is started, the inner steel pipe 2 begins to move forward. The steel pipe first passes through the anti-deviation mechanism at the opening. The symmetrically arranged second pulleys 16 wrap around the outer wall of the steel pipe from the circumference, providing initial radial constraint force, effectively preventing the steel pipe from tilting or swaying due to uneven force during the jacking start-up stage.

[0032] As the jacking continues, the steel pipe passes sequentially through multiple sets of internal fixed guide mechanisms pre-installed on the inner wall of the concrete pipe 1. Each set of limiting wheels 19 maintains rolling contact with the outer wall of the steel pipe, continuously restricting the displacement of the steel pipe in both the horizontal and vertical directions. At the same time, because the limiting wheels 19 are distributed at multiple points along the axial direction, the weight of the steel pipe itself is evenly transferred to the inner wall of the concrete pipe 1 through multiple contact points, avoiding bending deformation of the steel pipe and damage to the anti-corrosion layer caused by gravity concentration.

[0033] Throughout the jacking process, ground monitoring equipment tracks the center coordinates of the front end of the inner steel pipe 2 in real time. Once monitoring data indicates a deviation in the pipe's posture, the operator immediately activates the front-end hydraulic correction mechanism. Depending on the direction and magnitude of the deviation, the left or right hydraulic pump 6 is selectively operated, driving the connecting rod 7 to extend or retract the piston rod, pushing the slider 9 to slide within the cross groove 8. The sliding of the slider 9, transmitted via the connecting rod 10, is converted into the raising or lowering or tilting of the lifting plate 11, thereby applying a reverse correction force to the front end of the steel pipe, dynamically correcting its elevation and horizontal position. When encountering a curve, by controlling the different extension and retraction amounts of the hydraulic pumps 6 on both sides, the lifting plate 11 forms an inclination angle adapted to the curve, guiding the steel pipe smoothly through the bend.

[0034] By combining the passive limiting of the anti-deviation mechanism at the tunnel entrance, the continuous constraint of the fixed guiding mechanism inside the pipe, and the active adjustment of the front-end hydraulic correction mechanism, the coaxiality of the long-distance steel pipe is precisely controlled and dynamically corrected throughout the entire process from the entrance to the exit, until the entire steel pipe is jacked up and constructed.

[0035] Example 2 This embodiment provides a method for correcting the deviation of steel pipes inserted into a reclaimed water jacking pipe, based on a device for correcting the deviation of steel pipes inserted into a reclaimed water jacking pipe according to Embodiment 1, including the following steps: Installation steps: Install an anti-deviation mechanism at the inlet end of the concrete pipe 1, install multiple sets of pipe-fixed guide mechanisms on the inner wall of the pipe at set intervals along the axial direction of the concrete pipe 1, and assemble a front-end hydraulic correction mechanism at the front end of the first section of the inner steel pipe 2, so that the front-end hydraulic correction mechanism is fixedly connected to the inner steel pipe 2. Entry limiting procedure: Tighten the second adjusting bolt 17 to drive the limiting seat 15 to move radially, so that the wheel surface of the second pulley 16 abuts against the outer wall of the inner through steel pipe 2, and the radial displacement of the inlet end of the inner through steel pipe 2 is constrained by the circumferentially symmetrically arranged second pulley 16. The jacking and guiding steps are as follows: Start the jacking equipment to drive the inner steel pipe 2 into the concrete pipe 1, so that the inner steel pipe 2 passes through each set of fixed guide mechanisms in sequence. Each set of limit wheels 19 rolls in contact with the outer wall of the inner steel pipe 2, continuously maintaining the coaxial state of the inner steel pipe 2 and the concrete pipe 1, while uniformly transferring the weight of the steel pipe to the inner wall of the concrete pipe 1. Dynamic correction steps: During the movement of the inner steel pipe 2, the center position coordinates of the front end of the steel pipe are monitored in real time. Based on the monitoring data, the piston rod extension and retraction of the hydraulic pumps 6 on both sides are controlled respectively, driving the slider 9 to slide along the cross groove 8. Through the linkage rod 10, the lifting plate 11 is raised or tilted to adjust the elevation and horizontal position of the front end of the inner steel pipe 2 and correct the steel pipe offset. Repeat the above jacking guidance steps and dynamic correction steps until all the inner steel pipes 2 have been jacked up.

[0036] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A device for correcting the alignment of an inner steel pipe in a reclaimed water jacking pipe, used to coaxially insert an inner steel pipe (2) inside a concrete pipe (1), characterized in that, This includes an anti-deviation mechanism at the opening, an internal pipe fixing and guiding mechanism, and a front-end hydraulic correction mechanism; The anti-deviation mechanism of the opening includes a fixing block (3), which is located at the inlet end of the concrete pipe (1). A second adjusting bolt (17) passes through the fixing block (3) radially along the concrete pipe (1) and is threadedly connected to the fixing block (3). A limit seat (15) is connected to one end of the second adjusting bolt (17) facing the inside of the pipe. A second pulley (16) is installed on the limit seat (15) and abuts against the outer wall of the inner steel pipe (2). The pipe fixing guide mechanism includes a fixing plate (18), and the fixing plate (18) is arranged in several groups along the axial direction of the concrete pipe (1) on the inner wall of the concrete pipe (1). Limiting wheels (19) are installed on the fixing plate (18), and the limiting wheels (19) roll in contact with the outer wall of the inner steel pipe (2). The front-end hydraulic correction mechanism is located at the front end of the inner steel pipe (2), including a frame (4) and a lifting plate (11). The bottom of the frame (4) is equipped with a first pulley (5) that rolls against the inner wall of the concrete pipe (1). The top of the frame (4) is provided with a mounting seat (20). Two sets of hydraulic pumps (6) are symmetrically arranged at the front end of the mounting seat (20). The top of the mounting seat (20) is provided with two parallel cross grooves (8). A slider (9) is provided inside the cross grooves (8). The piston rod of the hydraulic pump (6) extends... The lifting plate (11) is inserted into the cross groove (8) and connected to the slider (9). Four connecting rods (10) are hinged to the bottom of the lifting plate (11). The lower ends of two of the connecting rods (10) are hinged to the top surface of the mounting base (20), and the lower ends of the other two connecting rods (10) are correspondingly hinged to the two sliders (9). The slider (9) is driven to slide along the cross groove (8) by the hydraulic pump (6). The lifting plate (11) is raised or lowered or tilted by the connecting rods (10) to adjust the radial position of the front end of the inner steel pipe (2).

2. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, The anti-deviation mechanism of the opening includes two sets of fixing blocks (3). The two sets of fixing blocks (3) are arranged circumferentially along the inlet end face of the concrete pipe (1). The limiting seat (15) is adapted to the arc of the outer wall of the inner steel pipe (2). At least one set of second pulleys (16) is installed on each limiting seat (15). Rotating the second adjusting bolt (17) can drive the second pulley (16) to move synchronously in the radial direction to adapt to inner steel pipes (2) of different diameters and adjust the pre-tightness of the second pulley (16) and the outer wall of the steel pipe.

3. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, Each set of the pipe fixing guide mechanism includes multiple fixing plates (18). The multiple fixing plates (18) are distributed equidistantly along the inner wall of the concrete pipe (1). Each set of the pipe fixing guide mechanism is evenly arranged along the axial direction of the concrete pipe (1) at a set interval. The wheel surface of the limiting wheel (19) is in flexible rolling contact with the outer wall of the inner steel pipe (2) to evenly transfer the weight of the inner steel pipe (2) to the inner wall of the concrete pipe (1).

4. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, The front-end hydraulic correction mechanism also includes an insertion plate (14), a threaded sleeve (12), and a first adjusting bolt (13). The insertion plate (14) has a slot adapted to the end wall thickness of the inner steel pipe (2). The front edge of the inner steel pipe (2) is engaged in the slot. Two sets of threaded sleeves (12) are symmetrically arranged on both sides of the insertion plate (14). The first adjusting bolt (13) passes through the threaded sleeve (12) and is threadedly connected to the threaded sleeve (12). Rotating the first adjusting bolt (13) can press its end against the wall of the inner steel pipe (2).

5. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, The hydraulic pump (6) is equipped with a drive linkage rod (7), which provides power to the hydraulic pump (6) by reciprocating the drive linkage rod (7) to drive the piston rod to extend and retract; the lifting plate (11) is adapted to the arc shape of the outer wall of the inner steel pipe (2), the cross groove (8) extends along the axial direction of the concrete pipe (1), and when the slider (9) slides along the cross groove (8), the horizontal displacement is converted into the lifting or tilting of the lifting plate (11) through the linkage rod (10).

6. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, The surfaces of the first pulley (5), the second pulley (16) and the limiting wheel (19) are all made of wear-resistant and flexible material.

7. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 1, characterized in that, The two sets of hydraulic pumps (6) can independently control the extension and retraction of the piston rod. By adjusting the different displacements of the sliders (9) on both sides, the lifting plate (11) can be raised or lowered or tilted laterally to adapt to the pipe-penetrating operation of the curved section concrete pipe (1).

8. The reclaimed water jacking pipe internal steel pipe correction device as described in claim 2, characterized in that, The fixing block (3) is fastened to the inlet end face of the concrete pipe (1) by expansion bolts; the limiting seat (15) is rotatably connected to the end of the second adjusting bolt (17) by bearings.

9. A device for correcting deviation of steel pipes inside a reclaimed water jacking pipe as described in claim 3, characterized in that, Each set of the pipe fixing guide mechanism includes four fixing plates (18). The four fixing plates (18) are evenly distributed at 90-degree intervals along the inner wall of the concrete pipe (1). Each fixing plate (18) is fixed to the inner wall of the concrete pipe (1) by expansion bolts. The limiting wheel (19) is installed on the end of the fixing plate (18) facing the center of the pipe by a wheel axle.

10. A method for correcting deviation of a steel pipe inserted inside a reclaimed water jacking pipe, characterized in that, A device for correcting deviation of steel pipes inside a reclaimed water jacking pipe as described in any one of claims 1-9 includes the following steps: Installation steps: Install the anti-deviation mechanism at the entrance of the concrete pipe (1), install multiple sets of the pipe fixing guide mechanism on the inner wall of the pipe at a set interval along the axial direction of the concrete pipe (1), assemble the front hydraulic correction mechanism at the front end of the first section of the inner steel pipe (2), and fix the front hydraulic correction mechanism to the inner steel pipe (2). Entry limiting step: Tighten the second adjusting bolt (17) to drive the limiting seat (15) to move radially, so that the wheel surface of the second pulley (16) abuts against the outer wall of the inner steel pipe (2), and the radial displacement of the inlet end of the inner steel pipe (2) is constrained by the circumferentially symmetrically arranged second pulley (16); The jacking guide step: Start the jacking equipment to drive the inner steel pipe (2) into the concrete pipe (1), so that the inner steel pipe (2) passes through each set of the pipe fixing guide mechanism in sequence, and each set of the limiting wheel (19) rolls in contact with the outer wall of the inner steel pipe (2), continuously maintaining the coaxial state of the inner steel pipe (2) and the concrete pipe (1), while uniformly transferring the weight of the steel pipe to the inner wall of the concrete pipe (1); Dynamic correction steps: During the movement of the inner steel pipe (2), the center position coordinates of the front end of the steel pipe are monitored in real time. Based on the monitoring data, the piston rod extension and retraction of the hydraulic pumps (6) on both sides are controlled respectively, driving the slider (9) to slide along the cross groove (8). Through the linkage rod (10), the lifting plate (11) is raised or tilted to adjust the elevation and horizontal position of the front end of the inner steel pipe (2) and correct the steel pipe offset. Repeat the above jacking guidance steps and dynamic correction steps until all the internal steel pipes (2) are jacked up.

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