Deflection-preventing and deviation-rectifying device for installing small-pipe-diameter jacking pipe in water-rich sand layer

Abstract

The invention discloses an anti-deflection deviation rectifying device for water-rich sand layer small-pipe-diameter jacking pipe installation, and belongs to the technical field of jacking pipe installation. The anti-deflection deviation rectifying device comprises a cutting device and a starting working well, a laser instrument is installed on the inner side of the starting working well, a guiding shell is fixedly installed outside the cutting device, the rear end of the guiding shell is universally connected with a rotating pipeline, and the rotating pipeline is connected with the starting working well. And a rotating driving assembly, a light target and an automatic deviation correction controller are arranged in the rotating pipeline, a guniting assembly is installed on the inner wall of the translation pipeline, and a protective shell is fixedly connected to the outer side wall of the rotating pipeline. According to the device, the circumferential angle of the rotating pipeline is accurately controlled through the arranged rotating driving assembly, the radial thrust of the servo hydraulic cylinder is matched, and the milliscale deviation rectifying precision in the three-dimensional space is achieved; through arrangement of the laser instrument, the light target, the automatic deviation correction controller and the digital twin platform, high-precision position monitoring and automatic deviation correction control of the digital twin platform are realized, and a deviation correction strategy is actively adjusted through real-time deep learning.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe jacking, and particularly relates to a deviation-preventing and deviation-correcting device for small-diameter pipe jacking in water-rich sand layer. BACKGROUND

[0002] When small-diameter pipe jacking is performed, a pipe jacking machine is usually used for drilling. The working surface environment of the pipe jacking machine is harsh, and the geological conditions are complex. During full-face cutting and jacking, the force system acting on the pipe jacking machine is usually unbalanced. The unbalanced force system makes the track of the pipe jacking machine never completely advance along the pipe design axis, and deviation from the pipe design axis may occur at any time.

[0003] Especially in water-rich sand layer, collapse may easily occur during pipe jacking, and the jacking axis is difficult to control. If carelessness occurs, the axis may be deviated and the machine head may sink. More seriously, the construction quality may be directly affected, and the pipe jacking construction may ultimately fail. In order to improve the success rate of construction, the deviation-preventing and deviation-correcting device is provided to correct the deviation of the pipe jacking machine.

[0004] However, under the influence of the changing construction conditions, high labor intensity, and insufficient operation experience of the operator, the existing deviation-preventing and deviation-correcting device may cause misjudgment or input error of the operation instruction, resulting in failure of deviation correction, low deviation correction efficiency, and influence on the pipe jacking construction quality. SUMMARY

[0005] The technical problem to be solved by the application is to overcome the defects of the prior art and provide a deviation-preventing and deviation-correcting device for small-diameter pipe jacking in water-rich sand layer.

[0006] The technical scheme adopted to solve the above technical problem is as follows: a deviation-preventing and deviation-correcting device for small-diameter pipe jacking in water-rich sand layer, comprising a cutting device and a starting working well. A laser instrument is mounted on the inner side of the starting working well. A guide shell is fixedly mounted on the outside of the cutting device. A rotating pipe is connected to the rear end of the guide shell in a universal manner. A translation pipe is rotatably connected to the other end of the rotating pipe. Four connecting pieces corresponding in position are fixedly connected to the inner side wall of the rotating pipe and the machine head side wall of the cutting device. The connecting pieces are uniformly arranged along the axis. Servo hydraulic cylinders are rotatably mounted between the corresponding two connecting pieces.

[0007] A rotating drive assembly for driving the rotating pipe to rotate is arranged in the rotating pipe. A light target for feeding back the position of the laser instrument ray is arranged in the rotating pipe. An automatic deviation correction controller is in control connection with the servo hydraulic cylinders, the rotating drive assembly, and the light target. A shotcrete assembly for spraying bentonite slurry is mounted on the inner wall of the translation pipe. A protective shell for protecting the shotcrete assembly is fixedly connected to the outer side wall of the rotating pipe.

[0008] Further, the light target and the center of the cutting device are uniformly located on the ray axis of the laser instrument.

[0009] Through the above technical scheme, the laser instrument in the originating working well emits a reference ray, and the light target at the center of the cutting device realizes high-precision position monitoring. The automatic deviation correction controller controls the servo hydraulic cylinder and the rotary drive assembly in time to adjust the direction of the cutting device according to the coordinate data, ensures that the jacking trajectory is always along the laser axis, greatly reduces the deviation risk, and guarantees the construction quality.

[0010] Further, the rotary drive assembly comprises a gear ring fixed to the inner side wall of the rotary pipe and a servo motor fixed to the inner side wall of the translation pipe. The output end of the servo motor is fixedly installed with a reduction box, the output end of the reduction box is fixedly connected with a gear, and the gear is meshed with the gear ring.

[0011] Through the above technical scheme, the servo motor cooperates with the reduction box to improve the torque, the driving gear drives the gear ring to rotate, the circumferential angle of the rotary pipe is accurately controlled, and the radial thrust of the servo hydraulic cylinder is cooperated to realize mill-level deviation correction accuracy in three-dimensional space and adapt to sudden deviation under complex geological conditions.

[0012] Further, the shotcreting assembly comprises an annular pipe fixed around the inner side wall of the translation pipe. A plurality of nozzles are equidistantly fixed to the side wall of the annular pipe and penetrate the inner side wall of the translation pipe. A delivery pipe is connected to the pipe opening of the annular pipe, and a valve is installed in the delivery pipe.

[0013] Through the above technical scheme, the annular pipe and the multi-directional nozzles uniformly spray bentonite slurry, a mud jacket can be formed around the pipe, the jacking friction is significantly reduced, the bentonite slurry penetrates into the sand layer gap to temporarily reinforce and inhibit surface subsidence.

[0014] Further, the side wall of one end of the rotary pipe close to the cutting device is provided with a spherical surface, the end of the guide housing close to the rotary pipe is provided with a movable clamping groove, the inner side wall of the movable clamping groove is provided with a spherical contact area, and the outer wall of the spherical contact area is in rolling contact with the inner wall of the spherical surface.

[0015] Through the above technical scheme, the spherical surface at the end of the rotary pipe and the spherical contact area of the movable clamping groove of the guide housing form a spherical joint structure, which provides conditions for universal adjustment of the jacking direction of the cutting device.

[0016] Further, the inner side wall of the protective shell is provided with a liquid storage groove, the position of the liquid storage groove corresponds to the position of the nozzles, a plurality of liquid outlet holes are provided through the side wall of the protective shell facing the originating working well, and the protective shell covers the rotary connection between the translation pipe and the rotary pipe.

[0017] Through the technical scheme, when the spray head sprays, the slurry enters the storage tank for temporary storage, the stored slurry is discharged through the liquid outlet hole to form a slurry sleeve around the pipe, and the protective shell protects the nozzle of the spray head, the liquid outlet hole does not directly contact the water-rich sand layer, and the risk of plugging is greatly reduced.

[0018] Further, a sealing groove one is formed in the outer wall of the front end connector of the translation pipeline, a sealing groove two is formed in the outer wall of the rear end connector of the rotation pipeline, the sealing groove one and the sealing groove two are combined into a sealing cavity, and the inner side wall of the sealing cavity is filled with a sealing ring.

[0019] Through the technical scheme, the sealing ring improves the sealing performance of the rotation joint, effectively prevents groundwater from entering, and ensures long-term stable operation of the equipment in a water-rich environment.

[0020] Further, the automatic deviation correction controller is electrically connected to the servo hydraulic cylinder, the light target, the servo motor and the digital twin platform through wires, and the digital twin platform performs deep learning and prediction based on the feedback data of the automatic deviation correction controller.

[0021] Through the technical scheme, the automatic deviation correction controller can complete continuous deviation correction action without manual intervention through integrated control of wires, has high response speed and control precision. The digital twin platform integrates multiple source information such as light target data, hydraulic pressure and motor load, constructs a digital mirror image of the construction process through a machine learning algorithm, can predict the trend of formation change in advance, actively adjusts the deviation correction strategy, and reduces the risk of sudden shutdown.

[0022] The beneficial effects of the present application are as follows:

[0023] (1) The rotation driving assembly precisely controls the circumferential angle of the rotation pipeline, and cooperates with the radial thrust of the servo hydraulic cylinder to realize mill-level deviation correction accuracy in three-dimensional space, and adapt to sudden deviation in complex geological conditions.

[0024] (2) The laser instrument, the light target, the automatic deviation correction controller and the digital twin platform are provided, the laser instrument and the light target cooperate to realize high-precision position monitoring, the automatic deviation correction controller is integratedly controlled through wires without manual intervention to complete continuous deviation correction action, has high response speed and control precision, the digital twin platform integrates multiple source information such as light target data, hydraulic pressure and motor load, constructs a digital mirror image of the construction process through a machine learning algorithm, can predict the trend of formation change in advance, actively adjusts the deviation correction strategy, and reduces the risk of sudden shutdown.

[0025] (3) through the set of protective shell, shotcrete assembly, through the annular pipe and multi-directional nozzle cooperate with the protective shell uniform injection of bentonite slurry, can be in the pipe around the formation of mud jacket, significantly reduce the jacking friction, at the same time, permeate into the sand layer gap temporary reinforcement effect, inhibit the surface subsidence. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a kind of water-rich sand layer small pipe diameter pipe installation anti-deviation correction device of the present application;

[0027] Figure 2 is a kind of water-rich sand layer small pipe diameter pipe installation anti-deviation correction device structure Figure One ;

[0028] Figure 3 is a kind of water-rich sand layer small pipe diameter pipe installation anti-deviation correction device structure Figure Two ;

[0029] Figure 4 is a kind of water-rich sand layer small pipe diameter pipe installation anti-deviation correction device of the present application rotating pipe three-dimensional view;

[0030] Figure 5 is a kind of water-rich sand layer small pipe diameter pipe installation anti-deviation correction device of the present application guide pipe shell three-dimensional view;

[0031] Figure 6 is Figure 2 enlarged view of A in figure;

[0032] Figure 7 is Figure 3 enlarged view of B in figure;

[0033] Figure 8 is Figure 3 enlarged view of C in figure.

[0034] Reference signs: 1, translation pipe; 2, rotating pipe; 3, guide shell; 4, cutting device; 5, connecting piece; 6, servo hydraulic cylinder; 7, rotating drive assembly; 8, shotcrete assembly; 9, light target; 10, laser instrument; 11, starting work well; 12, protective shell; 13, automatic deviation correction controller; 14, sealing ring; 101, sealing groove one; 201, spherical surface; 202, sealing groove two; 301, movable clamping slot; 302, spherical surface contact area; 701, gear ring; 702, servo motor; 703, speed reducer; 704, gear; 801, conveying pipe; 802, valve; 803, annular pipe; 804, nozzle; 1201, liquid storage tank; 1202, liquid outlet hole. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] like Figures 1-8 As shown in this embodiment, a deflection prevention and correction device for installing small-diameter pipe jacking in water-rich sandy layers includes a cutting device 4 and a starting working well 11. A laser instrument 10 is installed inside the starting working well 11. A guide housing 3 is fixedly installed on the outside of the cutting device 4. A rotating pipe 2 is universally connected to the rear end of the guide housing 3. A translation pipe 1 is rotatably connected to the other end of the rotating pipe 2. Four connecting parts 5 with corresponding positions are fixedly connected to the inner side wall of the rotating pipe 2 and the machine head side wall of the cutting device 4. The connecting parts 5 are evenly arranged along the axis. A servo hydraulic cylinder 6 is rotatably installed between each pair of corresponding connecting parts 5.

[0037] The rotating pipe 2 is equipped with a rotating drive assembly 7 to drive the rotating pipe 2 to rotate, a light target 9 to provide feedback on the position of the laser beam of the laser instrument 10, and an automatic correction controller 13 that is connected to the servo hydraulic cylinder 6, the rotating drive assembly 7, and the light target 9. The laser, the light target 9, and the controller are linked in three dimensions to achieve a smart closed loop of precise guidance and dynamic correction. The inner wall of the translation pipe 1 is equipped with a spraying assembly 8 for spraying bentonite slurry, and the outer wall of the rotating pipe 2 is fixed with a protective shell 12 to protect the spraying assembly 8.

[0038] The rotating pipe 2 has a spherical surface 201 on one side wall near the cutting device 4. The guide housing 3 has a movable slot 301 at one end near the rotating pipe 2. The inner side wall of the movable slot 301 has a spherical contact area 302. The outer wall of the spherical contact area 302 rolls in contact with the inner wall of the spherical surface 201. The spherical surface 201 at the end of the rotating pipe 2 and the spherical contact area 302 of the movable slot 301 of the guide housing 3 form a spherical joint structure, which provides conditions for universal adjustment of the jacking direction of the cutting device 4, and allows for a small angular offset while reducing wear and extending the equipment life.

[0039] The centers of the optical target 9 and the cutting device 4 are uniformly located on the ray axis of the laser instrument 10. The laser instrument 10, located in the starting working well 11, emits a reference ray, which, together with the optical target 9 at the center of the cutting device 4, enables high-precision position monitoring. When the cutting device 4 is operating, if the device's position deviates, the laser endpoint of the laser instrument 10 deviates from the center of the optical target 9. The optical target 9 feeds back the coordinate data of the laser endpoint to the automatic correction controller 13. The automatic correction controller 13 controls the servo hydraulic cylinder 6 and the rotary drive assembly 7 to adjust the direction of the cutting device 4 in a timely manner until the laser endpoint coincides with the center of the optical target 9 again. This ensures timely correction of the device, guaranteeing that the jacking trajectory always follows the laser axis, significantly reducing the risk of deviation and ensuring construction quality.

[0040] The rotating driving assembly 7 comprises a gear ring 701 fixed to the inner side wall of the rotating pipeline 2, a servo motor 702 fixed to the inner side wall of the translating pipeline 1, a reduction box 703 fixedly installed at the output end of the servo motor 702, a gear 704 fixedly connected to the output end of the reduction box 703, and the gear 704 is in meshing connection with the gear ring 701. The servo motor 702 cooperates with the reduction box 703 to reduce speed and increase torque, drives the gear 704 to rotate the gear ring 701, accurately controls the circumferential angle of the rotating pipeline 2, cooperates with the radial thrust of the servo hydraulic cylinder 6, and realizes mill-level correction accuracy in three-dimensional space to adapt to sudden deviation under complex geological conditions.

[0041] The shotcreting assembly 8 comprises an annular pipe 803 fixedly arranged around the inner side wall of the translating pipeline 1, a plurality of nozzles 804 equidistantly fixed to the side wall of the annular pipe 803, and the nozzles 804 all penetrate the inner side wall of the translating pipeline 1. The annular pipe 803 is connected with a delivery pipe 801 through the pipe opening, the delivery pipe 801 is internally provided with a valve 802, the bentonite slurry is uniformly sprayed through the annular pipe 803 and the multi-directional nozzles 804, a mud jacket is formed around the pipe, the frictional force of jacking is significantly reduced, the slurry penetrates into the sand layer gap to temporarily reinforce and inhibit surface settlement.

[0042] The inner side wall of the protective shell 12 is provided with a liquid storage groove 1201 corresponding to the position of the nozzles 804, a plurality of liquid outlet holes 1202 are through-provided in the side wall of the protective shell 12 facing the originating working well 11, the protective shell 12 covers the rotating connection part of the translating pipeline 1 and the rotating pipeline 2, the slurry enters the liquid storage groove 1201 for temporary storage when the nozzles 804 spray, the stored slurry is discharged through the liquid outlet holes 1202 to form a mud jacket around the pipe, and the liquid outlet holes 1202 are not in direct contact with the water-rich sand layer, which greatly reduces the risk of plugging. When the rotating driving assembly 7 drives the rotating pipeline 2 to rotate, the protective shell 12 rotates to change the position of the liquid outlet holes 1202, so that the slurry is more uniformly discharged. At the same time, the protective shell 12 covers the rotating connection part to protect the rotating joint, preventing foreign matters from invading the rotating joint to cause jamming;

[0043] The outer wall of the front end connector of the translating pipeline 1 is provided with a sealing groove one 101, the outer wall of the rear end connector of the rotating pipeline 2 is provided with a sealing groove two 202, the sealing groove one 101 and the sealing groove two 202 are combined into a sealing cavity, and the inner side wall of the sealing cavity is filled with a sealing ring 14. The sealing ring 14 improves the sealing performance of the rotating joint, effectively prevents underground water from invading, and ensures long-term stable operation of the equipment in a water-rich environment.

[0044] The automatic deviation correction controller 13 is electrically connected with the servo hydraulic cylinder 6, the light target 9, the servo motor 702 and the digital twin platform through wires, the digital twin platform carries out deep learning and prediction based on the feedback data of the automatic deviation correction controller 13, the controller can adopt PLC, DSP, industrial computer and the like and write corresponding measurement and control software to realize, the automatic deviation correction controller 13 controls the servo hydraulic cylinder 6, the servo motor 702 and the light target 9 through wires, and continuous deviation correction action can be completed without manual intervention, the response speed is fast, and the control precision is high.The digital twin platform integrates multi-source information such as light target 9 data, hydraulic pressure and motor load, constructs a digital mirror image of the construction process through a machine learning algorithm, can predict the trend of formation change in advance, actively adjusts the deviation correction strategy, and reduces the risk of sudden shutdown.

[0045] The working principle of the embodiment is as follows, before use, the laser of the laser instrument 10 is calibrated and debugged with the light target 9, after debugging is completed, the cutting device 4 carries out cutting operation on the water-rich sand layer, when the position of the device deviates, the laser end point of the laser instrument 10 deviates from the center of the light target 9, the light target 9 feeds back the coordinate data of the laser end point to the automatic deviation correction controller 13, the automatic deviation correction controller 13 controls the servo hydraulic cylinder 6 and the rotary drive assembly 7 to adjust the direction of the cutting device 4 in time according to the coordinate data, deviation correction of the tunneling direction is carried out in time, the jacking trajectory is ensured to always follow the laser axis, the deviation risk is reduced, and the construction quality is ensured;

[0046] The digital twin platform integrates multi-source information such as light target 9 data, hydraulic pressure and motor load, constructs a digital mirror image of the construction process through a machine learning algorithm, predicts the trend of formation change in advance, actively adjusts the deviation correction strategy, and reduces the risk of sudden shutdown;

[0047] Meanwhile, according to the geological conditions, the bentonite mixing ratio is adjusted, the additional agent is mixed, the conveying pipe 801 is connected with the external pump body, the valve 802 is opened, the bentonite slurry is uniformly sprayed through the annular pipe 803 and the multi-directional spray head 804, the slurry enters the temporary storage tank 1201 for temporary storage, the stored slurry is discharged through the liquid outlet hole 1202, a mud jacket is formed around the pipe, the jacking friction is significantly reduced, at the same time, the slurry penetrates into the sand layer gap to play a temporary reinforcement role, and the surface subsidence is inhibited, when the rotary drive assembly 7 drives the rotary pipe 2 to rotate, the protective shell 12 rotates and drives the liquid outlet hole 1202 to change position without stopping, so that the slurry is more uniform.

[0048] The above merely describes a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A device for preventing deviation and correcting deviation during the installation of small-diameter pipe jacking in water-rich sandy layers, comprising a cutting device (4) and a starting working shaft (11), characterized in that: A laser device (10) is installed inside the starting working well (11). A guide housing (3) is fixedly installed on the outside of the cutting device (4). A rotating pipe (2) is universally connected to the rear end of the guide housing (3). A translation pipe (1) is rotatably connected to the other end of the rotating pipe (2). Four connecting pieces (5) with corresponding positions are fixedly connected to the inner wall of the rotating pipe (2) and the head side wall of the cutting device (4). The connecting pieces (5) are evenly arranged along the axis. A servo hydraulic cylinder (6) is rotatably installed between each pair of connecting pieces (5). The rotating pipe (2) is equipped with a rotating drive assembly (7) to drive the rotating pipe (2) to rotate, a light target (9) to feed back the position of the laser beam (10), and an automatic correction controller (13) that is connected to the servo hydraulic cylinder (6), the rotating drive assembly (7), and the light target (9). The inner wall of the translation pipe (1) is equipped with a spraying assembly (8) for spraying bentonite slurry. The outer wall of the rotating pipe (2) is fixed with a protective shell (12) to protect the spraying assembly (8).

2. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The centers of the optical target (9) and the cutting device (4) are both located on the ray axis of the laser instrument (10).

3. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The rotary drive assembly (7) includes a gear ring (701) fixed to the inner wall of the rotary pipe (2) and a servo motor (702) fixed to the inner wall of the translation pipe (1). A reduction gearbox (703) is fixedly installed at the output end of the servo motor (702), and a gear (704) is fixedly connected to the output end of the reduction gearbox (703). The gear (704) meshes with the gear ring (701).

4. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The shotcrete assembly (8) includes an annular pipe (803) that is fixed around the inner wall of the translation pipe (1). A plurality of nozzles (804) are fixed at equal intervals on the side wall of the annular pipe (803). The nozzles (804) all penetrate the inner wall of the translation pipe (1). The opening of the annular pipe (803) is connected to a conveying pipe (801). A valve (802) is installed inside the conveying pipe (801).

5. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The rotating pipe (2) has a spherical surface (201) on one side wall near the cutting device (4), and the guide housing (3) has a movable slot (301) on one side near the rotating pipe (2). The inner side wall of the movable slot (301) has a spherical contact area (302), and the outer wall of the spherical contact area (302) makes rolling contact with the inner wall of the spherical surface (201).

6. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The inner wall of the protective shell (12) is provided with a liquid storage tank (1201), which corresponds to the position of the nozzle (804). The protective shell (12) has several liquid outlet holes (1202) through the side wall facing the starting working well (11). The protective shell (12) covers the rotating connection between the translation pipe (1) and the rotating pipe (2).

7. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 1, characterized in that, The front end connector of the translational pipe (1) has a sealing groove 1 (101) on its outer wall, and the rear end connector of the rotating pipe (2) has a sealing groove 2 (202) on its outer wall. The sealing groove 1 (101) and the sealing groove 2 (202) are combined to form a sealing cavity, and the inner wall of the sealing cavity is filled with a sealing ring (14).

8. The anti-deviation and correction device for installing small-diameter pipe jacking in water-rich sand layers according to claim 7, characterized in that: The automatic correction controller (13) is electrically connected to the servo hydraulic cylinder (6), the optical target (9), the servo motor (702), and the digital twin platform via wires. The digital twin platform performs deep learning and prediction based on the feedback data from the automatic correction controller (13).

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