Pulling-back device for alignment of jacking pipe axis

Abstract

The pull-back device is used for pulling back a pipe jacking machine head and a plurality of pipe joints in a soil body towards a working well, the pull-back device comprises a plurality of pull-back mechanisms, a mounting frame and a winding roller, the pull-back mechanisms are evenly distributed among the pipe joints, each pull-back mechanism comprises a supporting cylinder and a pull-back cylinder, and the supporting cylinders are arranged on the mounting frame. The end, located in the working well, of the supporting cylinder is slidably connected with a back-jacking cylinder, the inner wall of the supporting cylinder is fixedly connected with a plurality of piston cylinders, piston plates are slidably connected into the piston cylinders, one ends of the piston plates are fixedly connected with piston rods, and one ends of the piston rods are fixedly connected with the back-jacking cylinder. The ends, away from the back-jacking barrel, of the piston barrels jointly communicate with an annular pipe, and the mounting frame is slidably connected to one end in the working well. By means of the design of the back-jacking mechanism, the multiple pipe joints can be jacked back in a segmented mode, so that the force needing to be applied when the jacking pipe is dragged back is reduced, and then the back-dragging difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking construction, in particular to a pulling-back device for adjusting the axis of a pipe jacking. Background Art

[0002] Pipe jacking is a trenchless pipeline laying technology. During pipe jacking, the pipeline is prone to axial deviation due to geological changes, uneven jacking force, and other factors. Traditionally, jacking correction is used. However, this requires frequent starts and stops of the jacking equipment, resulting in low construction efficiency. Furthermore, correction of large curvatures can easily lead to damage to pipe joints, and it is impossible to achieve the overall straightening of the already jacked pipe section. After searching, a Chinese patent with publication number CN112412470A discloses a construction device and construction method for a pipe jacking machine and a pipe section retraction, which includes a pulling mechanism for pulling the pipe jacking machine and the pipe section back and a retraction mechanism for adaptively retracting according to the pulling speed of the pulling mechanism. The fixed end of the pulling mechanism is installed on the inner side of the front end wall of the working well, the movable end of the pulling mechanism passes through the pipe section and is connected to the rear shell of the pipe jacking machine, and the fixed end of the retraction mechanism is installed at the rear end of the working well. On the inner side of the well wall, the movable end of the retreat mechanism is connected to the last pipe section. The pulling mechanism pulls the multi-section pipe sections and the pipe jacking machine back section by section along the axial direction of the multi-section pipe sections into the working well. At the same time, the retreat mechanism provides positional support for the multi-section pipe sections and the pipe jacking machine, and adaptively retracts according to the pulling speed of the pulling mechanism to prevent the pipe jacking machine and the pipe sections from retreating rapidly due to inertia or thrust in the surrounding rock, so that the multi-section pipe sections can be disassembled section by section and then hoisted out of the working well, and the pipe jacking machine can also be hoisted out of the working well. In the above technology, although the main beam and the connecting beam are pushed to move by the pulling jack to pull the jacking pipe, the above device can only pull all the pipe sections and the machine head as a whole when pulling the jacking pipe, and cannot pull the pipe sections in sections. In this way, when the number of pipe sections is large, the resistance encountered will be relatively large, thereby increasing the difficulty of pulling and increasing the drawing cost. Summary of the Invention

[0003] The object of the present invention is to provide a pulling-back device for adjusting the axis of a jacking pipe, so as to solve the problem that it is inconvenient to pull-back and adjust the jacking pipe when it deviates.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a pulling-back device for adjusting the jacking axis, used to pull the jacking machine head and multiple pipe sections in the soil back toward the working well, comprising: There are multiple return-top mechanisms, which are evenly distributed between multiple pipe sections. The return-top mechanisms include a support cylinder and a return-top cylinder. The support cylinder is located at one end of the working well and is slidably connected to the return-top cylinder. The inner wall of the support cylinder is fixedly connected to multiple piston cylinders. The interior of the piston cylinder is slidably connected to a piston plate. One end of the piston plate is fixedly connected to a piston rod. One end of the piston rod is fixedly connected to the return-top cylinder. The multiple piston cylinders are connected to a ring tube at one end away from the return-top cylinder. A mounting frame, slidably connected to one end of the interior of the working well; There are two winding rollers, which are rotatably connected to the two ends of the mounting frame respectively. A return rope is wound around the middle of the winding roller, and the return rope is detachably connected to the return top cylinder.

[0005] Preferably, one end of the mounting frame is fixedly connected to a mounting tube, the mounting tube is fixedly connected to the middle of the mounting frame, one end of the mounting tube is connected to a first telescopic tube, the return mechanism also includes a plurality of second telescopic tubes, the second telescopic tubes are distributed between adjacent annular tubes and between the annular tubes and the mounting tube, the annular tubes and the first telescopic tubes are both detachably connected to the second telescopic tubes and are connected to the second telescopic tubes.

[0006] Preferably, it also includes a liquid storage tank, which is arranged on the top of the soil and located adjacent to the working well. One end of the liquid storage tank is connected to a liquid infusion pipe, one end of the liquid infusion pipe is connected to the installation cylinder, and one end of the liquid infusion pipe is installed with a first one-way valve.

[0007] Preferably, a movable plate is slidably connected to the inside of the mounting tube, and connecting rods are fixedly connected to both ends of the movable plate. One end of the connecting rod extends to the outside of the mounting tube and is slidably connected to the mounting tube. Two cylinders are fixedly connected to one end of the mounting frame, and the output end of the cylinder is fixedly connected to the connecting rod.

[0008] Preferably, a plurality of through holes are provided on the surface of the movable plate, a catheter is fixedly connected to the through hole on one side of the movable plate, a sliding rod is slidably connected inside the catheter, a first blocking block is fixedly connected to the top of the sliding rod, the first blocking block is fixedly connected to a first spring at one end of the sliding rod, and the first spring is fixedly connected to the catheter.

[0009] Preferably, a movable tube is provided inside the mounting tube, one end of the movable tube extends into the inside of the first telescopic tube and is slidably connected to the first telescopic tube, the movable plate is slidably connected to the movable tube, the mounting frame is located between the two cylinders and is fixedly connected to an electric push rod, the output end of the electric push rod is fixedly connected to the movable tube, a spring telescopic rod is fixedly connected to one end adjacent to the movable tube inside the first telescopic tube, one end of the spring telescopic rod is fixedly connected to a second block, and the end of the movable tube away from the second block is fixedly connected to a third block.

[0010] Preferably, the side wall of the movable tube is located at one end of the second blocking block and is provided with a plurality of first water holes, the side wall of the movable tube is located at one end of the third blocking block and is provided with a plurality of second water holes, the two ends of the interior of the mounting tube are respectively fixedly connected with support rings, the inner wall of the support ring is provided with a plurality of receiving grooves, one end of the receiving groove is fixedly connected with a second spring, one end of the second spring is fixedly connected with a movable block, the movable block is slidably connected to the receiving groove, and one end of the movable block is provided with a ball matched with the first water hole and the second water hole.

[0011] Preferably, the mounting tube is located at one end of the first telescopic tube and is fixedly connected to a tee tube, the two ends of the tee tube are respectively arranged on both sides of the first telescopic tube and are connected to the mounting tube, the movable tube is located at one end of the U-shaped tube and is fixedly connected to two connecting arms, and one end of the connecting arm is fixedly connected to a fourth blocking block.

[0012] Preferably, one end of the three-way pipe is connected to a return pipe, one end of the return pipe is connected to the top of the liquid storage tank, and one end of the return pipe is installed with a second one-way valve.

[0013] Preferably, the mounting frame is located adjacent to the winding roller and is fixedly connected to a motor, the output end of the motor is fixedly connected to the winding roller, the mounting frame is located around the mounting cylinder and is fixedly connected to four jacks, one end of the jack is fixedly connected to the side wall of the working well, and the mounting frame is located at one end of the first telescopic tube and is fixedly connected to four top blocks.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The hydraulic fluid in the cylinder flows through the first water hole into the movable tube, and then flows through the movable tube into the first telescopic tube, the second telescopic tube, the annular tube and the piston tube, thereby increasing the hydraulic pressure inside the piston tube. When the hydraulic pressure in the piston tube gradually increases, the piston plate and the piston plate are pushed to move, thereby pushing the return cylinder to move. Under the push of the return cylinder, the pipe section will move toward the working well, thereby realizing the return of the pipe section. The closer the return mechanism is to the working well, the fewer pipe sections it needs to push. Therefore, the return cylinder closer to the working well will push the pipe section to move first. By pushing the pipe section in sections, the force applied when pulling the pipe back is reduced, thereby reducing the difficulty of pulling back. When the cam is in the state of being pressed down, the hydraulic oil in the hydraulic cylinder is released, and the hydraulic oil in the hydraulic cylinder is increased, so that the cam can be pressed downwards to stop the hydraulic oil in the hydraulic cylinder from flowing out of the hydraulic cylinder. The present invention adopts the design of the first water hole, the second water hole and the ball structure, so that the movable plate can draw out the hydraulic oil in the piston cylinder when it moves, wherein the electric push rod drives the movable tube to move in the direction of the infusion tube until the first water hole on the movable tube is blocked by the ball near one end of the first telescopic tube. When the first water hole is blocked by the ball at one end of the first telescopic tube, the second water hole is in an open state. At this time, when the cylinder drives the movable plate to move in the direction of the first telescopic tube, the hydraulic oil near one end of the first telescopic tube in the mounting cylinder will be squeezed into the tee pipe and flow back through the tee pipe. When the hydraulic oil in the piston cylinder is lowered to the limit of one end, the hydraulic oil in the piston cylinder will flow into the hydraulic oil storage tank through the hydraulic pipe, and the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At this time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At this time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. At the same time, the hydraulic oil in the piston cylinder will be pumped out through the hydraulic pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention when it is in a construction state; Figure 2 This is a schematic diagram of the connection structure between the present invention, the pipe jacking machine head and the pipe joint; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 Schematic diagram of the side cross-section structure of the support cylinder and the return cylinder in the present invention; Figure 5 Schematic side cross-section of the piston cylinder in the present invention; Figure 6Schematic diagram of the connection structure between the mounting frame and the jack in the present invention; Figure 7 This is a schematic diagram of the connection structure between the mounting frame and the winding roller of the present invention; Figure 8 Schematic diagram of the side cross-section structure of the installation cylinder in the present invention; Figure 9 for Figure 8 A local enlarged structural diagram in FIG. Figure 10 Schematic diagram of the connection structure between the movable plate and the movable tube in the present invention; Figure 11 is a cross-sectional view of the support ring in the present invention; Figure 12 Based Figure 11 A schematic diagram of the local enlarged structure at point B in FIG. Figure 13 It is a schematic diagram of the side cross-sectional structure of the movable plate and the conduit in the present invention.

[0016] In the figure: 1. Soil; 2. Pipe jacking machine head; 3. Pipe joint; 4. Working well; 5. Return jacking mechanism; 501. Support cylinder; 502. Return jacking cylinder; 503. Piston cylinder; 504. Piston plate; 505. Piston rod; 506. Ring tube; 507. Second telescopic tube; 6. Mounting frame; 7. Winding roller; 8. Return tow rope; 9. Mounting cylinder; 10. First telescopic tube; 11. Liquid storage tank; 12. Liquid delivery tube; 13. First one-way valve; 14. Moving plate; 15. Connecting rod; 16. Cylinder; 17. Through hole; 18 , catheter; 19, sliding rod; 20, first blocking block; 21, first spring; 22, moving tube; 23, electric push rod; 24, spring telescopic rod; 25, second blocking block; 26, third blocking block; 27, first water hole; 28, second water hole; 29, support ring; 30, receiving groove; 31, second spring; 32, moving block; 33, ball; 34, three-way pipe; 35, connecting arm; 36, fourth blocking block; 37, return pipe; 38, second one-way valve; 39, motor; 40, jack; 41, top block. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See also Figures 1-13The present invention provides a technical solution: a back-dragging device for adjusting the jacking axis, which is used to drag the jacking machine head 2 and the multi-section pipe section 3 in the soil body 1 back to the working well 4, including a back-dragging mechanism 5, a mounting frame 6 and a winding roller 7. The back-dragging mechanism 5 is provided with multiple and evenly distributed between the multi-section pipe sections 3. The back-dragging mechanism 5 includes a support cylinder 501 and a back-dragging cylinder 502. The support cylinder 501 is located at one end of the working well 4 and is slidably connected to the back-dragging cylinder 502. The inner wall of the support cylinder 501 is fixedly connected to multiple piston cylinders 503. The piston cylinder 503 is slidably connected to a piston plate 504. One end of the piston plate 504 is fixedly connected to a piston rod 505. One end of the piston rod 505 is fixedly connected to the back-dragging cylinder 502. The mounting frame 6 is fixedly connected, and one end of the multiple piston cylinders 503 away from the return cylinder 502 is commonly connected to the annular tube 506. The mounting frame 6 is slidably connected to one end inside the working well 4. There are two winding rollers 7, which are rotatably connected to both ends of the mounting frame 6. A return rope 8 is wound around the middle of the winding roller 7, and the return rope 8 is detachably connected to the return cylinder 502. The mounting frame 6 is fixedly connected to the motor 39 at a position adjacent to the winding roller 7. The output end of the motor 39 is fixedly connected to the winding roller 7. The mounting frame 6 is fixedly connected to four jacks 40 around the mounting cylinder 9. One end of the jack 40 is fixedly connected to the side wall of the working well 4. The mounting frame 6 is fixedly connected to four top blocks 41 at one end of the first telescopic tube 10. Specifically, when the pipe jacking construction is carried out, it is necessary to push the mounting frame 6 to move by four jacks 40, so that the top block 41 on the mounting frame 6 pushes the pipe section 3 and the pipe jacking machine head 2 to move, so as to realize the pipeline burial. During the pipe jacking construction, the axis deviation is easy to occur due to geological changes and uneven top force. When the pipe jacking deviates, it is necessary to drag the pipe back to adjust the pipe jacking. During the pipe jacking construction, multiple top-returning mechanisms 5 need to be evenly arranged between the pipe sections 3, and one of the top-returning mechanisms 5 needs to be arranged at one end of the pipe jacking machine head 2, and then the back-dragging rope is pulled back. One end of 8 is connected to the return top cylinder 502 closest to the working well 4. When towing back, the motor 39 needs to drive the winding roller 7 to rotate, so as to reel in the return towing rope 8 and then pull the top pipe. Then the staff needs to inject hydraulic oil into the annular tube 506 in the return top mechanism 5. When the annular tube 506 is filled with hydraulic oil, the hydraulic oil will flow into the piston cylinder 503. When the hydraulic pressure in the piston cylinder 503 gradually increases, it will push the piston plate 504 and the piston plate 504 to move, thereby pushing the return top cylinder 502 to move. Under the push of the return top cylinder 502, the pipe joint 3 will move toward the working well 4, so as to realize the back-dragging of the pipe section 3. The closer the return-top mechanism 5 is to the working well 4, the fewer pipe sections 3 it needs to push. Therefore, the return-top cylinder 502 closer to the working well 4 will push the pipe section 3 to move first. By pushing the pipe section 3 in sections, the force applied when the pipe is back-dragging is reduced, thereby reducing the difficulty of back-dragging. When all the return-top cylinders 502 in the return-top mechanism 5 have moved, the staff needs to pump out the hydraulic oil in the annular tube 506 and the piston cylinder 503. At this time, negative pressure will be generated in the piston cylinder 503. At the same time, due to the return The cylinder 502 is pulled by the return towing rope 8, so under the action of negative pressure, the piston cylinder 503 will move toward the piston rod 505, and then drive the support cylinder 501 to move toward the return topping cylinder 502, thereby dragging the rear pipe section 3 and the jacking head 2 toward the working well 4, thereby realizing the overall retrieval of the jacking pipe. In order to avoid the pipe sections 3 from falling off, the adjacent pipe sections 3 can be fixed together through flanges during use. In addition, the support cylinder 501 and the return topping cylinder 502 and the pipe section 3, as well as the support cylinder 501 and the jacking head 2 are all connected through flanges.

[0019] like Figure 3 、 Figure 6 、 Figure 8 and Figure 13As shown, one end of the mounting frame 6 is fixedly connected to the mounting cylinder 9, the mounting cylinder 9 is fixedly connected to the middle of the mounting frame 6, one end of the mounting cylinder 9 is connected to the first telescopic tube 10, the top return mechanism 5 also includes a plurality of second telescopic tubes 507, the second telescopic tubes 507 are distributed between adjacent annular tubes 506 and between the annular tube 506 and the mounting cylinder 9, the annular tube 506 and the first telescopic tube 10 are detachably connected to the second telescopic tube 507, and are connected to the second telescopic tube 507; it also includes a liquid storage tank 11, the liquid storage tank 11 is arranged on the top of the soil body 1, and is located at a position adjacent to the working well 4, one end of the liquid storage tank 11 is connected to a liquid infusion pipe 12, one end of the liquid infusion pipe 12 is connected to the mounting cylinder 9, and one end of the liquid infusion pipe 12 is installed A first one-way valve 13; a movable plate 14 is slidably connected to the interior of the mounting cylinder 9, and connecting rods 15 are fixedly connected at both ends of the movable plate 14. One end of the connecting rod 15 extends to the outside of the mounting cylinder 9 and is slidably connected to the mounting cylinder 9. One end of the mounting frame 6 is fixedly connected to two cylinders 16, and the output end of the cylinder 16 is fixedly connected to the connecting rod 15; a plurality of through holes 17 are provided on the surface of the movable plate 14, and a conduit 18 is fixedly connected to one side of the movable plate 14 at the through hole 17. A sliding rod 19 is slidably connected to the interior of the conduit 18, and a first blocking block 20 is fixedly connected to the top of the sliding rod 19. The first blocking block 20 is fixedly connected to a first spring 21 at one end of the sliding rod 19, and the first spring 21 is fixedly connected to the conduit 18; Specifically, there is no need to install the second telescopic tube 507 during pipe jacking construction, thereby avoiding the second telescopic tube 507 affecting the construction. When the pipe jacking needs to be pulled back, the staff needs to install the two ends of the second telescopic tube 507 on the two adjacent annular tubes 506 respectively. In addition, the two ends of the second telescopic tube 507 closest to the working well 4 are respectively installed on the annular tube 506 and the first telescopic tube 10. When the pipe jacking is pulled back, it is first necessary to drive the movable plate 14 to move by two cylinders 16. When the movable plate 14 moves toward the first telescopic tube 10, the hydraulic oil between the first telescopic tube 10 and the movable plate 14 in the installation tube 9 will be squeezed into the first telescopic tube 10, and flow into the second telescopic tube 507, the annular tube 506 and the piston cylinder 503 through the first telescopic tube 10, thereby increasing the hydraulic pressure in the piston cylinder 503. In this process, the first blocking block 20 will press the through hole under the hydraulic pressure. When the first one-way valve 13 on the fluid delivery pipe 12 is in the process of being sucked out, the hydraulic oil in the fluid storage tank 11 can flow into the mounting cylinder 9 through the fluid delivery pipe 12, and the hydraulic oil in the fluid storage tank 11 can flow into the mounting cylinder 9 through the fluid delivery pipe 12, and the hydraulic oil in the fluid storage tank 11 can flow into the mounting cylinder 9 through the fluid delivery pipe 12, and the hydraulic oil in the fluid delivery pipe 12 can flow into the mounting cylinder 9 through the first one-way valve 13 on the fluid delivery pipe 12, so that the hydraulic oil can only flow from the oil storage tank to the mounting cylinder 9 and cannot flow back. When the movable plate 14 moves in the direction of the fluid delivery pipe 12, the hydraulic pressure in the space at one end of the fluid delivery pipe 12 in the mounting cylinder 9 will increase, and the first blocking block 20 will separate from the movable plate 14 under the push of the hydraulic pressure. At this time, the first spring 21 will contract, and the hydraulic oil at one end of the fluid delivery pipe 12 in the mounting cylinder 9 will pass through the through hole 17 through the movable plate 14 and flow into the space inside the mounting cylinder 9 near one end of the first telescopic tube 10, so that the subsequent movable plate 14 can continue to push the hydraulic oil into the piston cylinder 503.

[0020] like Figures 8 to 12As shown, a moving tube 22 is provided inside the mounting cylinder 9, one end of the moving tube 22 extends into the inside of the first telescopic tube 10 and is slidably connected to the first telescopic tube 10, the moving plate 14 is slidably connected to the moving tube 22, the mounting frame 6 is located between the two cylinders 16 and is fixedly connected to an electric push rod 23, the output end of the electric push rod 23 is fixedly connected to the moving tube 22, the inside of the first telescopic tube 10 is fixedly connected to a spring telescopic rod 24 at one end adjacent to the moving tube 22, one end of the spring telescopic rod 24 is fixedly connected to a second block 25, and the end of the moving tube 22 away from the second block 25 is fixedly connected to a third Block 26; the side wall of the movable tube 22 is located at one end of the second block 25 and is provided with a plurality of first water holes 27, the side wall of the movable tube 22 is located at one end of the third block 26 and is provided with a plurality of second water holes 28, and the two ends of the interior of the mounting tube 9 are fixedly connected to support rings 29, and the inner wall of the support ring 29 is provided with a plurality of receiving grooves 30, one end of the receiving groove 30 is fixedly connected to a second spring 31, and one end of the second spring 31 is fixedly connected to a movable block 32, the movable block 32 is slidably connected to the receiving groove 30, and one end of the movable block 32 is provided with a ball 33 adapted to the first water hole 27 and the second water hole 28; Specifically, when it is necessary to increase the hydraulic pressure in the piston cylinder 503, it is first necessary to drive the movable tube 22 to move toward the first telescopic tube 10 through the electric push rod 23. When the second water hole 28 on the movable tube 22 moves to below the ball 33 near one end of the infusion tube 12, the movable block 32 and the ball 33 will move toward the movable tube 22 under the push of the second spring 31, so that the ball 33 will block the second water hole 28. When the second water hole 28 is blocked by the ball 33 at one end of the infusion tube 12, the first water hole 27 is in an open state. When the first water hole 27 is blocked by the ball 33 at one end of the infusion tube 12, the first water hole 27 is in an open state. 0 is blocked by the ball 33 at one end of the infusion tube 12, the second water hole 28 is in an open state. In addition, when the second water hole 28 is blocked by the ball 33 at one end of the infusion tube 12, the output port of the mobile tube 22 is just blocked by the second blocking block 25. Then, the cylinder 16 pushes the mobile plate 14 toward the first telescopic tube 10. At this time, the hydraulic oil at one end of the first telescopic tube 10 inside the mounting tube 9 will increase. At this time, the hydraulic oil will flow into the mobile tube 22 through the first water hole 27. When the hydraulic pressure in the mobile tube 22 continues to increase, it will push the second blocking block 25 to move, and the spring telescopic rod 24 will retract. The hydraulic oil in the moving tube 22 can flow smoothly into the first telescopic tube 10, and then flow into the second telescopic tube 507, the annular tube 506 and the piston cylinder 503 through the first telescopic tube 10, thereby increasing the hydraulic pressure inside the piston cylinder 503. It should be noted that the spring constant of the second spring 31 is much greater than the spring constant of the spring in the spring telescopic rod 24. Therefore, when the hydraulic pressure in the moving tube 22 increases, the spring telescopic rod 24 will contract first, allowing the hydraulic oil in the moving tube 22 to flow smoothly into the first telescopic tube 10 through the output port, and cannot flow back into the mounting tube 9 through the second water hole 28. When the cylinder 16 When the movable plate 14 is driven to move toward the infusion tube 12, although the hydraulic oil in the mounting cylinder 9 near one end of the infusion tube 12 can pass through the movable plate 14 through the through hole 17 at this time, when the movable plate 14 moves faster, the space in the mounting cylinder 9 near one end of the first telescopic tube 10 will still generate negative pressure. In order to prevent the negative pressure from drawing the hydraulic oil in the piston cylinder 503 back into the mounting cylinder 9, the output port of the movable tube 22 is blocked by the design of the second blocking block 25. Under the action of negative pressure, the second blocking block 25 will firmly block the output port of the movable tube 22, thereby preventing the hydraulic oil in the piston cylinder 503 from flowing back.

[0021] like Figure 6 、 Figure 8 、 Figure 10 and Figure 11As shown, the mounting cylinder 9 is located at one end of the first telescopic tube 10 and is fixedly connected to a tee pipe 34. The two ends of the tee pipe 34 are respectively arranged on both sides of the first telescopic tube 10 and are in communication with the mounting cylinder 9. The movable tube 22 is located at one end of the U-shaped tube and is fixedly connected to two connecting arms 35. One end of the connecting arm 35 is fixedly connected to a fourth blocking block 36. One end of the tee pipe 34 is in communication with a return pipe 37. One end of the return pipe 37 is in communication with the top of the liquid storage tank 11. One end of the return pipe 37 is installed with a second one-way valve 38. When the second water hole 28 is blocked by the ball 33 at one end of the infusion tube 12, the fourth blocking block 36 will block the two ends of the three-way tube 34. When the piston rod 505 pushes the return cylinder 502 to move, the hydraulic oil in the piston cylinder 503 needs to be pumped out. At this time, the electric push rod 23 needs to be used to drive the movable tube 22 to move in the direction of the infusion tube 12 until the first water hole 27 on the movable tube 22 is blocked by the ball 33 near one end of the first telescopic tube 10. At this time, the output port of the movable tube 22 will be separated from the second blocking block 25, and one end of the movable tube 22 is still located in the first telescopic tube 10. At the same time, the third blocking block 26 will block the output port of the infusion tube 12. In addition, the fourth blocking block 36 will be detached from the two input ports of the three-way tube 34. At this time, when the cylinder 16 drives the movable plate 14 to move in the direction of the first telescopic tube 10, the inner wall of the mounting tube 9 near the first telescopic tube The hydraulic oil at one end of 10 will be squeezed into the three-way pipe 34 and flow into the return pipe 37 through the three-way pipe 34, and finally flow back to the liquid storage tank 11. The design of the second one-way valve 38 on the return pipe 37 allows the hydraulic oil to flow only from the mounting cylinder 9 to the liquid storage tank 11 and cannot flow back. Moreover, since the first water hole 27 is blocked by the ball 33 and one end of the movable tube 22 is still located in the first telescopic tube 10, the movable plate 14 will not squeeze the hydraulic oil into the movable tube 22 or the first telescopic tube 10 when moving. In addition, when the movable plate 14 moves toward the first telescopic tube 10, negative pressure will be generated in the mounting cylinder 9 at one end near the infusion tube 12. Under the action of the negative pressure, the hydraulic oil in the piston cylinder 503 will flow into the mounting cylinder 9 through the second telescopic tube 507, the first telescopic tube 10, the movable tube 22 and the second water pipe, thereby pumping out the hydraulic oil in the piston cylinder 503.

[0022] Working principle: When pulling back the jacking pipe, the staff needs to connect one end of the pulling rope 8 to the pulling cylinder 502 closest to the working well 4, and then drive the winding roller 7 to rotate through the motor 39 to reel in the pulling rope 8, thereby pulling the jacking pipe, and then drive the moving pipe 22 to move toward the first telescopic pipe 10 through the electric push rod 23. When the second water hole 28 on the moving pipe 22 moves to the bottom of the ball 33 near one end of the infusion pipe 12, the moving block 32 and the ball 33 are in the second elastic state. When the second water hole 28 is blocked by the ball 33 at one end of the infusion tube 12, the first water hole 27 is in an open state. In addition, when the second water hole 28 is blocked by the ball 33 at one end of the infusion tube 12, the output end of the mobile tube 22 is blocked by the second block 25. Then, the cylinder 16 pushes the mobile plate 14 to move toward the first telescopic tube 10. At this time, the internal position of the mounting tube 9 is The hydraulic oil at one end of the first telescopic tube 10 will increase, and the hydraulic oil will flow into the mobile tube 22 through the first water hole 27. When the hydraulic pressure in the mobile tube 22 continues to increase, it will push the second block 25 to move. At this time, the spring telescopic rod 24 will contract. At this time, the hydraulic oil in the mobile tube 22 can smoothly flow into the first telescopic tube 10, and flow into the second telescopic tube 507, the annular tube 506 and the piston cylinder 503 through the first telescopic tube 10, thereby increasing the hydraulic pressure inside the piston cylinder 503. When the piston cylinder 503 When the internal hydraulic pressure gradually increases, it will push the piston plate 504 and the piston plate 504 to move, thereby pushing the return jacking cylinder 502 to move. Under the push of the return jacking cylinder 502, the pipe segment 3 will move toward the working well 4, thereby realizing the back-dragging of the pipe segment 3. The closer the return jacking mechanism 5 is to the working well 4, the fewer pipe segments 3 it needs to push. Therefore, the return jacking cylinder 502 closer to the working well 4 will push the pipe segment 3 to move first. By pushing the pipe segment 3 in sections, the force applied when back-dragging the pipe is reduced, thereby reducing the difficulty of back-dragging. When the movable plate 14 moves in the direction of the first telescopic tube 10, the first blocking block 20 will block the through hole 17 under the squeeze of the hydraulic pressure. At the same time, when the movable plate 14 moves in the direction of the first telescopic tube 10, a negative pressure will be generated in the space near one end of the infusion tube 12 inside the mounting cylinder 9. Under the suction effect of the negative pressure, the hydraulic oil in the reservoir 11 will flow into the mounting cylinder 9 through the infusion tube 12. When the movable plate 14 moves in the direction of the infusion tube 12, the hydraulic pressure in the space at one end of the infusion tube 12 in the mounting cylinder 9 will increase. Under the push of the hydraulic pressure, the first blocking block 20 will separate from the movable plate 14. At this time, the first spring 21 will contract. At this time, the hydraulic oil at one end of the infusion tube 12 inside the mounting cylinder 9 will pass through the through hole 17 through the movable plate 14 and flow into the space near one end of the first telescopic tube 10 inside the mounting cylinder 9, so that the subsequent movable plate 14 can continue to push the hydraulic oil into the piston cylinder 503. When all the return cylinders 502 in the return mechanism 5 have moved, it is necessary to pump out the hydraulic oil in the piston cylinder 503. At this time, the mobile tube 22 needs to be driven by the electric push rod 23 to move toward the infusion tube 12 until the first water hole 27 on the mobile tube 22 is blocked by the ball 33 near one end of the first telescopic tube 10. When the first water hole 27 is blocked by the ball 33 located at one end of the first telescopic tube 10, the second water hole 28 is in an open state. At the same time, the output port of the mobile tube 22 will be separated from the second blocking block 25, and one end of the mobile tube 22 is still located in the first telescopic tube 10. At this time, the third blocking block 26 will block the output port of the infusion tube 12, and the fourth blocking block 36 will be detached from the two input ports of the tee pipe 34. At this time, when the cylinder 16 drives the movable plate 14 to move toward the first telescopic tube 10, the installation tube 9 is close to the first telescopic tube 10. The hydraulic oil at one end will be squeezed into the tee pipe 34 and flow into the return pipe 37 through the tee pipe 34, and finally flow back into the liquid storage tank 11. In addition, when the movable plate 14 moves toward the first telescopic tube 10, negative pressure will be generated in the installation cylinder 9 at one end near the infusion tube 12. Under the action of negative pressure, the hydraulic oil in the piston cylinder 503 will flow into the installation cylinder 9 through the second telescopic tube 507, the first telescopic tube 10, the movable tube 22 and the second water pipe, thereby pumping out the hydraulic oil in the piston cylinder 503. At this time, negative pressure will be generated in the piston cylinder 503. At the same time, since the return cylinder 502 is pulled by the return towing rope 8, the piston cylinder 503 will move toward the piston rod 505 under the action of negative pressure, thereby driving the support cylinder 501 to move toward the return topping cylinder 502, thereby dragging the rear pipe section 3 and the jacking head 2 toward the working well 4, thereby realizing the overall back dragging of the jacking pipe.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulling-back device for adjusting the jacking axis, used for pulling the jacking machine head (2) and the multi-section pipe section (3) in the soil (1) back toward the working well (4), characterized in that: include: A plurality of return-top mechanisms (5) are provided and are evenly distributed between the multiple pipe sections (3). The return-top mechanism (5) comprises a support cylinder (501) and a return-top cylinder (502). The support cylinder (501) is located at one end of the working well (4) and is slidably connected to the return-top cylinder (502). The inner wall of the support cylinder (501) is fixedly connected to a plurality of piston cylinders (503). The interior of the piston cylinder (503) is slidably connected to a piston plate (504). One end of the piston plate (504) is fixedly connected to a piston rod (505). One end of the piston rod (505) is fixedly connected to the return-top cylinder (502). The ends of the plurality of piston cylinders (503) away from the return-top cylinder (502) are commonly connected to an annular tube (506). A mounting frame (6) is slidably connected to one end of the interior of the working well (4); Two winding rollers (7) are provided and are rotatably connected to the two ends of the mounting frame (6) respectively. A return rope (8) is wound around the middle of the winding roller (7), and the return rope (8) is detachably connected to the return top cylinder (502).

2. A pulling-back device for adjusting the jacking pipe axis according to claim 1, characterized in that: One end of the mounting frame (6) is fixedly connected to a mounting tube (9), the mounting tube (9) is fixedly connected to the middle of the mounting frame (6), one end of the mounting tube (9) is connected to a first telescopic tube (10), the return mechanism (5) further comprises a plurality of second telescopic tubes (507), the second telescopic tubes (507) are distributed between adjacent annular tubes (506) and between the annular tubes (506) and the mounting tube (9), the annular tubes (506) and the first telescopic tubes (10) are both detachably connected to the second telescopic tubes (507) and are connected to the second telescopic tubes (507).

3. A pulling-back device for adjusting the jacking pipe axis according to claim 2, characterized in that: The invention also includes a liquid storage tank (11), which is arranged on the top of the soil body (1) and is located adjacent to the working well (4). One end of the liquid storage tank (11) is connected to a liquid delivery pipe (12), one end of the liquid delivery pipe (12) is connected to the installation cylinder (9), and one end of the liquid delivery pipe (12) is installed with a first one-way valve (13).

4. A pulling-back device for adjusting the jacking pipe axis according to claim 3, characterized in that: A movable plate (14) is slidably connected inside the mounting cylinder (9), and connecting rods (15) are fixedly connected at both ends of the movable plate (14). One end of the connecting rod (15) extends to the outside of the mounting cylinder (9) and is slidably connected to the mounting cylinder (9). Two cylinders (16) are fixedly connected to one end of the mounting frame (6), and the output ends of the cylinders (16) are fixedly connected to the connecting rods (15).

5. A pulling-back device for adjusting the jacking pipe axis according to claim 4, characterized in that: The surface of the movable plate (14) is provided with a plurality of through holes (17), one side of the movable plate (14) is fixedly connected to a conduit (18) at the through hole (17), the interior of the conduit (18) is slidably connected to a slide rod (19), the top of the slide rod (19) is fixedly connected to a first block (20), the first block (20) is located at one end of the slide rod (19) and is fixedly connected to a first spring (21), and the first spring (21) is fixedly connected to the conduit (18).

6. A pulling-back device for adjusting the jacking pipe axis according to claim 5, characterized in that: A moving tube (22) is provided inside the mounting tube (9), one end of the moving tube (22) extends into the inside of the first telescopic tube (10) and is slidably connected to the first telescopic tube (10), the moving plate (14) is slidably connected to the moving tube (22), the mounting frame (6) is located between the two cylinders (16) and is fixedly connected to an electric push rod (23), the output end of the electric push rod (23) is fixedly connected to the moving tube (22), the inside of the first telescopic tube (10) is fixedly connected to a spring telescopic rod (24) at one end adjacent to the moving tube (22), one end of the spring telescopic rod (24) is fixedly connected to a second block (25), and the end of the moving tube (22) away from the second block (25) is fixedly connected to a third block (26).

7. A pulling-back device for adjusting the jacking pipe axis according to claim 6, characterized in that: The side wall of the movable tube (22) is provided with a plurality of first water holes (27) at one end of the second blocking block (25), and the side wall of the movable tube (22) is provided with a plurality of second water holes (28) at one end of the third blocking block (26). The two ends of the interior of the mounting tube (9) are fixedly connected with support rings (29), and the inner wall of the support ring (29) is provided with a plurality of receiving grooves (30). One end of the receiving groove (30) is fixedly connected with a second spring (31), and one end of the second spring (31) is fixedly connected with a movable block (32). The movable block (32) is slidably connected to the receiving groove (30), and one end of the movable block (32) is provided with a ball (33) adapted to the first water hole (27) and the second water hole (28).

8. A pulling-back device for adjusting the jacking pipe axis according to claim 7, characterized in that: The mounting tube (9) is located at one end of the first telescopic tube (10) and is fixedly connected to a three-way tube (34). The two ends of the three-way tube (34) are respectively arranged on both sides of the first telescopic tube (10) and are in communication with the mounting tube (9). The movable tube (22) is located at one end of the U-shaped tube and is fixedly connected to two connecting arms (35). One end of the connecting arm (35) is fixedly connected to a fourth blocking block (36).

9. A pulling-back device for adjusting the jacking pipe axis according to claim 8, characterized in that: One end of the three-way pipe (34) is connected to a return pipe (37), one end of the return pipe (37) is connected to the top of the liquid storage tank (11), and one end of the return pipe (37) is installed with a second one-way valve (38).

10. A pulling-back device for adjusting the jacking pipe axis according to claim 9, characterized in that: The mounting frame (6) is located adjacent to the winding roller (7) and is fixedly connected to a motor (39). The output end of the motor (39) is fixedly connected to the winding roller (7). The mounting frame (6) is located around the mounting cylinder (9) and is fixedly connected to four jacks (40). One end of the jack (40) is fixedly connected to the side wall of the working well (4). The mounting frame (6) is located at one end of the first telescopic tube (10) and is fixedly connected to four top blocks (41).

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