Pipe anti-floating device

Abstract

The present application provides a pipeline anti-floating device, and relates to the technical field of pipeline laying. The pipeline anti-floating device comprises an upper steel pipe, and a multi-sided clamping structure is arranged at the lower end of the upper steel pipe. The multi-sided clamping structure can press and limit the pipeline in the pipe groove from multiple sides. The multi-sided clamping structure comprises a lower steel pipe. The multi-sided clamping structure at the lower end of the upper steel pipe cooperates with a self-adaptive pneumatic flow channel. Gas is diffused to a second piston cylinder through a first inner wall inner flow channel group and a second inner wall inner flow channel group, and then is distributed to a third piston cylinder through a passage. Because the combined pressure in the fourth piston cylinder is greater than that of the first compression spring and the second compression spring, the gas preferentially drives the first piston head and the second piston head to move downward, and drives the first arc-shaped pressing elbow and the second arc-shaped pressing elbow to extend. The pipeline can be pressed and limited from multiple sides. Even if the pipeline is in a non-parallel state, the arc-shaped pressing elbow can be self-adaptively attached to the surface of the pipeline. The problem that the traditional pressing mode cannot comprehensively limit and closely attach is solved, and the pipeline limiting stability is improved.

Description

Technical Field

[0001] This invention belongs to the field of pipeline laying technology, and more specifically, relates to a pipeline anti-floating device. Background Technology

[0002] Pipeline laying in fluid soil environments is a special construction scenario in municipal, power, water supply and drainage projects. The core issue is to prevent pipelines from floating or shifting to the left or right due to soil shrinkage and settlement during the solidification process of fluid soil.

[0003] A search of Chinese patent publication number "CN119324394A" reveals "Anti-floating device for power ducts". This device can support different numbers of power ducts according to the number of ducts being laid, offering flexibility and convenience. Through a support mechanism and a fixing mechanism, multiple support seats, a first side plate, and a second side plate are fixed to the concrete base plate of the construction pit bottom wall. The fixed support seats secure the power ducts passing through the slot holes, preventing the power ducts from floating up during the concrete solidification process and thus avoiding deformation of the concrete. This effectively improves the construction quality and efficiency of power duct installation.

[0004] Based on the above search and existing technology, it was found that in actual use, when fluid soil solidifies, it is accompanied by significant soil shrinkage and settlement, which can easily cause the pipeline to float or shift to the left or right. However, the device is a rigid fixed structure and cannot adaptively adjust to follow the pipeline displacement. When the pipeline shifts slightly due to soil changes, gaps may appear between the fixed structure and the pipeline, thus losing the limiting effect and failing to continuously control the risk of floating and shifting to the left or right. In addition, if the rigid constraint generates a reverse force with the pipeline displacement, it may also lead to uneven local stress on the pipeline and damage to the interface, making it inconvenient to use. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a pipeline anti-floating device.

[0006] Pipeline anti-floating device, including upper steel pipe.

[0007] Preferably, the upper steel pipe is provided with a pipe groove clamping wall structure, which can fix the pipe anti-floating device in the pipe grooves at different intervals;

[0008] The pipe groove clamping structure includes side sliding grooves and sliding discs. Two side sliding grooves are formed on the side wall of the upper steel pipe, and a through groove is formed between them. A lead screw is threaded onto the inner side of the upper steel pipe. The sliding disc is rotatably mounted at the end of the lead screw and is slidably mounted to the upper steel pipe. Slider blocks are symmetrically fixedly mounted on the circumferential surface of the sliding disc. Two sliders pass through the through groove and are slidably mounted inside the side sliding grooves. First side rotating frames are symmetrically fixedly mounted on the circumferential surface of the upper steel pipe. Driven connecting rods are rotatably mounted on the inner sides of both first side rotating frames. A driving connecting rod is rotatably mounted between the sliders and the driven connecting rods. A second side rotating frame is rotatably mounted at the end of the driven connecting rod. A clamping plate is fixedly mounted on the side wall of the second side rotating frame. In use, the operator first rotates the lead screw. Because the lead screw is threaded to the inner side of the upper steel pipe, rotation... The process generates a threaded transmission force, which drives the sliding disc mounted at the end of the screw to slide vertically upward along the inner wall of the upper steel pipe. The sliders, which are symmetrically fixed on the circumference of the sliding disc, simultaneously pass through the through grooves on the side wall of the upper steel pipe. Under the guidance and limiting action of the side sliding grooves on both sides, they move upward with the sliding disc. When the sliders move, they drive the active connecting rod, which is rotatably connected to the driven connecting rod, to move upward synchronously. With the help of the first side rotating frame fixed on the circumference of the upper steel pipe, the rotation of the driven connecting rod is limited. The active connecting rod applies a radial thrust obliquely upward to the driven connecting rod, forcing the entire driven connecting rod to rotate outward around the first side rotating frame as the axis. The end of the driven connecting rod is fixedly connected to the clamping plate through the second side rotating frame. By adjusting the angle of the second side rotating frame, the finally unfolded driven connecting rod forms a symmetrical clamping force on the pipe wall through the clamping plate, and the device is firmly fixed on both sides of the pipe wall of different sizes.

[0009] Preferably, the lower end of the upper steel pipe is provided with a multi-directional clamping structure, which can press and limit the pipe in the pipe groove from multiple directions.

[0010] The multi-directional clamping structure includes a lower steel pipe, which is fixedly connected to the lower end of the upper steel pipe. Side steel pipes are symmetrically fixedly installed on the circumferential surface of the lower steel pipe. A first piston cylinder and a second piston cylinder are fixedly installed inside the lower steel pipe, respectively. The second piston cylinder is located below the first piston cylinder and is fixedly connected. A channel is opened inside the side steel pipe, and a third piston cylinder is fixedly installed inside the channel. The interior of the third piston cylinder is connected to the interior of the channel and the interior of the second piston cylinder. When the sliding plate moves upward, it drives the piston assembly fixedly installed at its lower end to slide upward in a sealed manner inside the first piston cylinder. The piston head at the end of the piston assembly is always located below the first inner wall flow channel group, ensuring that the gas in the first piston cylinder can be completely squeezed. The gas is transported to the second and third piston cylinders through the flow channel, pushing the first piston head and the second piston head to move respectively, thereby driving the first arc-shaped pressing elbow and the second arc-shaped pressing elbow to extend, realizing multi-directional pressing and limiting of the pipeline.

[0011] Preferably, the multi-sided clamping structure is provided with an adaptive pneumatic flow channel, which can adapt to the clamping movement of the pipe groove clamping structure to fit the multi-sided clamping structure to the pipe surface, and can still fit stably even when the pipe is not parallel.

[0012] The adaptive pneumatic flow channel includes a first inner wall inward flow channel group, which is formed inside the first piston cylinder. A second inner wall inward flow channel group is formed inside the second piston cylinder. The first and second inner wall inward flow channel groups communicate with each other. A piston assembly is fixedly installed at the lower end of the sliding disc. The piston assembly is slidably and sealed inside the first piston cylinder. The piston head at the end of the piston assembly is located below the first inner wall inward flow channel group. A first compression spring is fixedly installed inside the second piston cylinder. A first piston head is fixedly installed on the top of the first compression spring. The first piston head is slidably and sealingly mounted with the second piston cylinder. A first arc-shaped pressing elbow is fixedly mounted on the lower end of the first piston head. The first arc-shaped pressing elbow is slidably and sealingly mounted with the second piston cylinder. The first arc-shaped pressing elbow is located inside the first compression spring. The pressing element of the first arc-shaped pressing elbow is located outside the second piston cylinder. A second compression spring is fixedly mounted inside the third piston cylinder. A second piston head is fixedly mounted on the top of the second compression spring. The second piston head is slidably and sealingly mounted with the third piston cylinder. A second arc-shaped pressing elbow is fixedly mounted on the lower end of the second piston head. The second arc-shaped pressing elbow is located outside the second piston cylinder. Inside the second compression spring, the second arc-shaped pressing elbow is slidably installed with the third piston cylinder in a sealed manner. The pressing element of the second arc-shaped pressing elbow is located outside the third piston cylinder. After the piston assembly compresses the gas in the first piston cylinder, the gas is transported through the first inner wall internal flow channel group to the second inner wall internal flow channel group inside the second piston cylinder. It is then evenly diffused into the cavity of the second piston cylinder through this flow channel group, and further evenly distributed into the third piston cylinder fixed inside the side steel pipe through the channel opened inside the side steel pipe fixed on the circumferential surface of the lower steel pipe. Due to the combined pressure of the third compression spring and the third piston head inside the fourth piston cylinder, which is greater than that of the second piston cylinder, the pressure is also greater. The pressure applied by the first compression spring inside the stopper cylinder and the second compression spring inside the third piston cylinder causes the gas to preferentially act on the first and second piston heads. Under the sealing and limiting effect of the inner wall of the second piston cylinder, the first piston head overcomes the elastic force of the first compression spring and contracts, simultaneously driving the first arc-shaped pressing elbow fixed at its lower end to extend downward. Under the sealing and limiting effect of the inner wall of the third piston cylinder, the second piston head overcomes the elastic force of the second compression spring and contracts, driving the second arc-shaped pressing elbow fixed at its lower end to extend downward. Even if the pipeline is in a non-parallel state, each arc-shaped pressing elbow can adaptively conform to the pipeline surface under the action of gas pressure.

[0013] Preferably, the circumferential surface of the multi-clamping structure is provided with an adaptive driven pressurization structure. When the position of the pipe changes, the adaptive driven pressurization structure will automatically pressurize the adaptive pneumatic flow channel, so that the multi-clamping structure always fits the pipe surface.

[0014] The adaptive driven pressurization structure includes a bracket, which is fixedly installed on the circumferential surface of the lower steel pipe. A fourth piston cylinder is fixedly installed on the side wall of the bracket. A third compression spring is symmetrically fixedly installed inside the fourth piston cylinder. A third piston head is fixedly installed between the ends of the third compression springs. The third piston head is slidably and sealed to the fourth piston cylinder. An air pipe is fixedly connected between the air inlet at the lower end of the fourth piston cylinder and the interiors of the third and second piston cylinders. A sliding strip is fixedly connected to the upper end of the third piston head. The sliding strip is slidably and sealed to the fourth piston cylinder and extends partially above it. After the first arc-shaped pressing elbow and two second arc-shaped pressing elbows extend to their limit positions, the first and second compression springs cannot be further compressed. Continuing to rotate the screw keeps the sliding plate moving upwards, and the gas in the first piston cylinder is continuously output and transported to the interior of the fourth piston cylinder through the air pipe. The thrust generated by the gas overcomes the elastic force of the third compression spring, pushing the third piston head upwards to maintain a sealed sliding contact with the inner wall of the fourth piston cylinder. This causes the sliding strip fixed at the upper end of the third piston head to move upward synchronously, increasing the length of the sliding strip exposed above the fourth piston cylinder. This allows for a direct visual indication that the arc-shaped pressing elbow has extended to its limit. Once the multi-clamping structure is fully fixed and the arc-shaped pressing elbow is tightly fitted to the pipe, the gas in the first, second, third, and fourth piston cylinders reaches a stable pressure balance. During the subsequent solidification of the fluidized soil, the pipe in the trench is prone to displacement due to factors such as soil shrinkage and settlement. This causes some of the arc-shaped pressing elbows to lose rigid contact with the pipe surface. At this time, the gas pressure in the corresponding side piston cylinder decreases, and the adaptive driven pressurization structure automatically starts. With the help of the elastic restoring force of the third compression spring and the pressure transmission effect of the third piston head, the third compression spring pushes the third piston head downward, sending the gas in the fourth piston cylinder to the corresponding empty side second or third piston cylinder through the air pipe. This continuously pushes the piston head to move the arc-shaped pressing elbow towards the pipe. The arc-shaped pressing elbow and the pipe can be adaptively fitted without manual intervention, maintaining the pressing and limiting effect on the pipe and preventing the pipe from floating.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, through the pipe groove clamping wall structure on the upper steel pipe, when the operator rotates the screw, the thread transmission characteristics between the screw and the upper steel pipe generate an axial force, which drives the sliding disk connected to the end of the screw to move vertically upward along the inner wall of the upper steel pipe. The slider on the circumference of the sliding disk passes through the through groove and slides synchronously under the guidance and limitation of the side sliding groove, thereby driving the active connecting rod to pull upward. Combined with the rotation constraint of the driven connecting rod by the first side rotating frame, the driven connecting rod unfolds outward with the first side rotating frame as the axis. The angle of the clamping plate is adjusted by the second side rotating frame, and finally a symmetrical clamping force is formed. This can achieve stable positioning of the device on the pipe wall of different spacing and different size pipe grooves, avoid the installation adaptation problem caused by different pipe groove specifications, and improve the tightness of the fit between the device and the pipe wall, ensuring the reliability and versatility of the overall installation.

[0017] In this invention, the multi-sided clamping structure at the lower end of the upper steel pipe, combined with the adaptive pneumatic flow channel, drives the piston assembly to slide and seal within the first piston cylinder as the sliding disc moves upward. The piston head at the end of the piston assembly compresses the gas in the cavity, and the gas diffuses through the first inner wall flow channel group and the second inner wall flow channel group to the second piston cylinder, and then is distributed to the third piston cylinder through the channel. Because the combined pressure in the fourth piston cylinder is greater than that of the first compression spring and the second compression spring, the gas preferentially pushes the first piston head and the second piston head downward, causing the first arc-shaped pressing elbow and the second arc-shaped pressing elbow to extend. This can achieve multi-sided pressing and limiting of the pipeline. Even if the pipeline is in a non-parallel state, the two arc-shaped pressing elbows can adaptively fit the pipeline surface, solving the problems of incomplete limiting and loose fit in traditional pressing methods, and improving the pipeline limiting stability.

[0018] In this invention, an adaptive pneumatic flow channel combined with a multi-directional clamping structure is used. When the sliding disc moves upward, it drives the piston assembly to slide and seal within the first piston cylinder. The piston head at the end of the piston assembly precisely squeezes the gas in the cavity. The gas is introduced into the second inner wall flow channel group through the first inner wall flow channel group, achieving uniform diffusion before entering the second piston cylinder. It is then smoothly distributed to the third piston cylinders on both sides through the channel, pushing the first piston head and the second piston head to move downward synchronously, causing the first arc-shaped pressing elbow and the second arc-shaped pressing elbow to extend. This can solve the problem of uneven bonding in traditional mechanical pressing. Even if the pipes are not parallel, they can still be interconnected, allowing the elbows to fit tightly and adaptively against the pipe surface, improving the sealing and stability of the multi-directional pressing limit.

[0019] In this invention, an adaptive driven pressurization structure is used in conjunction with an adaptive pneumatic flow channel. When the first and second arc-shaped pressing elbows extend to their limits and the first and second compression springs can no longer contract, the screw continues to rotate to move the sliding plate upward. Gas is continuously output from the first piston cylinder and transported to the fourth piston cylinder through the air pipe. The gas thrust overcomes the elasticity of the third compression spring, pushing the third piston head to move upward along the inner wall of the fourth piston cylinder, causing the sliding strip to rise synchronously. This increases the length of the sliding strip exposed above the fourth piston cylinder. This allows for a direct indication of whether the two arc-shaped pressing elbows have reached their limits, preventing operators from damaging the device due to over-operation because they cannot judge the pressing depth, or from insufficient pressing affecting the limiting effect. At the same time, it reserves sufficient gas for subsequent pressurization, improving the convenience and accuracy of installation operations.

[0020] In this invention, an adaptive driven pressurization structure, combined with a multi-clamping structure and an adaptive pneumatic flow channel, enables the pipeline to shift due to soil shrinkage and settlement during the solidification process of the fluidized soil. When the first or second arc-shaped pressing elbow loses contact with the pipeline, the air pressure in the corresponding first or third piston cylinder decreases. At this time, the adaptive driven pressurization structure automatically starts, the third compression spring releases its elastic restoring force, and pushes the third piston head down along the fourth piston cylinder. The gas in the cavity is then supplied to the piston cylinder with insufficient air pressure through the air pipe, continuously pushing the corresponding arc-shaped pressing elbow to move towards the pipeline. Adaptive fitting can be achieved without manual intervention, maintaining the pressing and limiting effect at all times. This effectively avoids the risk of pipeline floating, reduces the workload of subsequent inspection and adjustment, lowers construction and maintenance costs, and ensures the laying stability of the pipeline during the solidification stage. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a cross-sectional view of the upper and lower steel pipes of the present invention;

[0023] Figure 3 This is a schematic diagram of the upper steel pipe assembly structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the driven link assembly structure of the present invention;

[0025] Figure 5 This is a sectional view of the side steel pipe of the present invention;

[0026] Figure 6 This is a schematic diagram of the first piston cylinder assembly structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the lower steel pipe assembly structure of the present invention;

[0028] Figure 8 This is the present invention. Figure 7 Enlarged view of the structure at point A in the image;

[0029] Figure 9 This is a cross-sectional view of the second piston cylinder of the present invention;

[0030] Figure 10 This is a schematic diagram of the side steel pipe assembly structure of the present invention;

[0031] Figure 11 This is a cross-sectional view of the fourth piston cylinder of the present invention;

[0032] Figure 12 This is a planar sectional view of the present invention.

[0033] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: 11. Upper steel pipe; 12. Side sliding groove; 13. Through groove; 14. Lead screw; 15. Sliding disc; 16. Slider; 17. First side rotating frame; 18. Driven connecting rod; 19. Driving connecting rod; 21. Second side rotating frame; 22. Clamping plate; 23. Lower steel pipe; 24. Side steel pipe; 25. First piston cylinder; 26. Second piston cylinder; 27. Third piston cylinder; 28. First inner wall internal flow channel assembly; 29. ​​Second inner wall internal flow channel assembly; 31. Piston assembly; 32. First compression spring; 33. First piston head; 34. First arc-shaped pressing elbow; 35. Second compression spring; 36. Second piston head; 37. Second arc-shaped pressing elbow; 38. Channel; 39. Support; 41. Fourth piston cylinder; 42. Third compression spring; 43. Third piston head; 44. Air pipe; 45. Sliding bar. Detailed Implementation

[0034] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0035] Please see Figure 1 - Figure 12 The present invention provides a pipeline anti-floating device, including an upper steel pipe 11.

[0036] The upper steel pipe 11 is equipped with a pipe groove clamping structure, which can fix the anti-floating device of the pipe in the pipe grooves with different spacing. The pipe groove clamping structure includes a side sliding groove 12 and a sliding plate 15. Both side sliding grooves 12 are opened on the side wall of the upper steel pipe 11, and a through groove 13 is opened between the side sliding grooves 12. A screw rod 14 is threaded on the inner side of the upper steel pipe 11. The sliding plate 15 is rotatably installed at the end of the screw rod 14 and is slidably installed with the upper steel pipe 11. The circumference of the sliding plate 15 is... Two sliders 16 are symmetrically fixedly installed, and both sliders 16 slide inside the side slide groove 12 through the through groove 13. The upper steel pipe 11 is symmetrically fixedly installed with a first side rotating frame 17. The inner side of each of the two first side rotating frames 17 is rotatably installed with a driven connecting rod 18. The slider 16 and the driven connecting rod 18 are rotatably installed with a driving connecting rod 19. The end of the driven connecting rod 18 is rotatably installed with a second side rotating frame 21. A clamping plate 22 is fixedly installed on the side wall of the second side rotating frame 21.

[0037] Through the pipe groove clamping structure on the upper steel pipe 11, when the operator rotates the screw 14, the screw 14 and the upper steel pipe 11 generate an axial force through the thread transmission characteristics of the screw 14 and the upper steel pipe 11. This causes the sliding plate 15, which is rotatably connected to the end of the screw 14, to move vertically upward along the inner wall of the upper steel pipe 11. The slider 16 on the circumference of the sliding plate 15 passes through the through groove 13 and slides synchronously under the guidance and limitation of the side sliding groove 12. This drives the active connecting rod 19 to pull upward. Combined with the rotation constraint of the driven connecting rod 18 by the first side rotating frame 17, the driven connecting rod 18 unfolds outward with the first side rotating frame 17 as the axis. The angle of the clamping plate 22 is adjusted by the second side rotating frame 21, and finally a symmetrical clamping force is formed. This can achieve stable positioning of the device on the pipe wall of different spacing and different size pipe grooves, avoid the installation adaptation problem caused by different pipe groove specifications, and improve the tightness of the fit between the device and the pipe wall, ensuring the reliability and versatility of the overall installation.

[0038] The lower end of the upper steel pipe 11 is provided with a multi-directional clamping structure, which can press and limit the pipe in the pipe groove from multiple directions. The multi-directional clamping structure includes a lower steel pipe 23, which is fixedly connected to the lower end of the upper steel pipe 11. Side steel pipes 24 are symmetrically fixedly installed on the circumferential surface of the lower steel pipe 23. A first piston cylinder 25 and a second piston cylinder 26 are fixedly installed inside the lower steel pipe 23. The second piston cylinder 26 is located below the first piston cylinder 25 and is fixedly connected. A channel 38 is opened inside the side steel pipe 24. A third piston cylinder 27 is fixedly installed inside the channel 38. The interior of the third piston cylinder 27 is connected to the interior of the channel 38 and the interior of the second piston cylinder 26.

[0039] With the multi-directional clamping structure at the lower end of the upper steel pipe 11 and the adaptive pneumatic flow channel, when the sliding plate 15 moves upward, it synchronously drives the piston assembly 31 to slide and seal within the first piston cylinder 25. The piston head at the end of the piston assembly 31 compresses the gas in the chamber. The gas diffuses through the first inner wall flow channel group 28 and the second inner wall flow channel group 29 to the second piston cylinder 26, and then is distributed to the third piston cylinder 27 through the channel 38. Because the combined pressure in the fourth piston cylinder 41 is greater than that of the first compression spring 32 and the second compression spring 35, the gas preferentially pushes the first piston head 33 and the second piston head 36 downward, causing the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 to extend. This can achieve multi-directional pressing and limiting of the pipeline. Even if the pipeline is in a non-parallel state, the two arc-shaped pressing elbows can adaptively fit the pipeline surface, solving the problems of incomplete limiting and loose fit in traditional pressing methods, and improving the stability of pipeline limiting.

[0040] The multi-clamping structure is equipped with an adaptive pneumatic flow channel. This adaptive pneumatic flow channel can adapt to the clamping movement of the pipe groove clamping structure, allowing the multi-clamping structure to fit snugly against the pipe surface, even when the pipe is not parallel. The adaptive pneumatic flow channel includes a first inner wall internal flow channel group 28, which is located inside the first piston cylinder 25. A second inner wall internal flow channel group 29 is located inside the second piston cylinder 26. The first inner wall internal flow channel group 28 and the second inner wall internal flow channel group 29 communicate with each other. A piston assembly 31 is fixedly installed at the lower end of the sliding disc 15. The piston assembly 31 is located inside the first piston cylinder 25 and is slidably sealed. The piston head at the end of the piston assembly 31 is located below the first inner wall internal flow channel group 28. A first compression spring 32 is fixedly installed inside the second piston cylinder 26, and a first piston head 33 is fixedly installed on top of the first compression spring 32. The first piston head 33 is slidably installed in a sealed manner with the second piston cylinder 26. A first arc-shaped pressing elbow 34 is fixedly installed at the lower end of the first piston head 33. The first arc-shaped pressing elbow 34 is slidably installed in a sealed manner with the second piston cylinder 26. The first arc-shaped pressing elbow 34 is located inside the first compression spring 32. The pressing part of the first arc-shaped pressing elbow 34 is located outside the second piston cylinder 26. A second compression spring 35 is fixedly installed inside the third piston cylinder 27. A second piston head 36 is fixedly installed at the top of the second compression spring 35. The second piston head 36 is slidably installed in a sealed manner with the third piston cylinder 27. A second arc-shaped pressing elbow 37 is fixedly installed at the lower end of the second piston head 36. The second arc-shaped pressing elbow 37 is located inside the second compression spring 35. The second arc-shaped pressing elbow 37 is slidably installed in a sealed manner with the third piston cylinder 27. The pressing part of the second arc-shaped pressing elbow 37 is located outside the third piston cylinder 27.

[0041] With the adaptive pneumatic flow channel and multi-clamping structure, when the sliding disk 15 moves upward, it drives the piston assembly 31 to slide and seal within the first piston cylinder 25. The piston head at the end of the piston assembly 31 precisely squeezes the gas in the cavity. The gas is introduced into the second inner wall flow channel group 29 through the first inner wall inner flow channel group 28, and after uniform diffusion, it enters the second piston cylinder 26. Then, it is smoothly distributed to the third piston cylinders 27 on both sides through the channel 38, pushing the first piston head 33 and the second piston head 36 to move downward synchronously, driving the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 to extend. This can solve the problem of uneven bonding in traditional mechanical pressing. Even if the pipes are not parallel, they can still be interconnected to make the elbows and pipe surfaces fit together adaptively and tightly, improving the sealing and stability of the multi-pronged pressing limit.

[0042] The multi-clamping structure has an adaptive driven pressurization structure on its circumferential surface. When the position of the pipe changes, the adaptive driven pressurization structure will automatically pressurize the adaptive pneumatic flow channel, so that the multi-clamping structure always fits the pipe surface. The adaptive driven pressurization structure includes a bracket 39, which is fixedly installed on the circumferential surface of the lower steel pipe 23. A fourth piston cylinder 41 is fixedly installed on the side wall of the bracket 39. A third compression spring 42 is symmetrically fixedly installed inside the fourth piston cylinder 41. A third piston head 43 is fixedly installed between the ends of the third compression spring 42. The third piston head 43 is sealed and slidably installed with the fourth piston cylinder 41. An air pipe 44 is fixedly connected between the air inlet at the lower end of the fourth piston cylinder 41 and the interior of the third piston cylinder 27 and the second piston cylinder 26. A sliding strip 45 is fixedly connected to the upper end of the third piston head 43. The sliding strip 45 is sealed and slidably installed with the fourth piston cylinder 41 and extends partially above the fourth piston cylinder 41.

[0043] With the adaptive driven pressurization structure and adaptive pneumatic flow channel, when the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 extend to the limit and the first compression spring 32 and the second compression spring 35 can no longer contract, the screw 14 continues to rotate to move the sliding plate 15 upward. The gas in the first piston cylinder 25 is continuously output and transported to the fourth piston cylinder 41 through the air pipe 44. The gas thrust overcomes the elastic force of the third compression spring 42 and pushes the third piston head 43 to move upward along the inner wall of the fourth piston cylinder 41, causing the sliding strip 45 to rise synchronously. This increases the length of the sliding strip 45 exposed above the fourth piston cylinder 41. This can intuitively indicate whether the two arc-shaped pressing elbows have reached the limit state, avoiding damage to the device due to over-operation by the operator due to inability to judge the pressing depth, or insufficient pressing affecting the limiting effect. At the same time, it reserves sufficient gas for subsequent pressurization, improving the convenience and accuracy of installation and operation.

[0044] By using an adaptive passive pressurization structure in conjunction with a multi-clamping structure and an adaptive pneumatic flow channel, when the fluidized soil undergoes solidification, the pipe displacement is caused by soil shrinkage and settlement, causing the first arc-shaped pressing elbow 34 or the second arc-shaped pressing elbow 37 to disengage from the pipe. At this time, the air pressure in the corresponding first piston cylinder 25 or third piston cylinder 27 decreases. The adaptive passive pressurization structure is automatically activated, and the third compression spring 42 releases its elastic restoring force, pushing the third piston head 43 down along the fourth piston cylinder 41. The gas in the cavity is then supplied to the piston cylinder with insufficient air pressure through the air pipe 44, continuously pushing the corresponding arc-shaped pressing elbow towards the pipe. This achieves adaptive fitting without manual intervention, maintaining the pressing and limiting effect, effectively avoiding the risk of pipe floating, reducing the workload of later inspection and adjustment, lowering construction and maintenance costs, and ensuring the laying stability of the pipe during the solidification stage.

[0045] Working principle:

[0046] In the first step, during use, the operator first rotates the lead screw 14. Because the lead screw 14 is threadedly connected to the inner side of the upper steel pipe 11, the rotation generates a threaded transmission force, which drives the sliding plate 15, which is rotated and installed at the end of the lead screw 14, to slide vertically upward along the inner wall of the upper steel pipe 11. The sliders 16, which are symmetrically fixed on the circumferential surface of the sliding plate 15, simultaneously pass through the through grooves 13 on the side wall of the upper steel pipe 11. Under the guidance and limiting action of the side sliding grooves 12 on both sides, they move upward with the sliding plate 15. When the sliders 16 move, they drive the active connecting rod 19, which is rotatably connected to the driven connecting rod 18, to move upward synchronously. The first side rotating frame 17, which is fixed on the circumferential surface of the tube 11, limits the rotation of the driven link 18. The active link 19 applies a radial thrust obliquely upward to the driven link 18, forcing the driven link 18 to rotate outward around the first side rotating frame 17 as the axis. The end of the driven link 18 is fixedly connected to the clamping plate 22 through the second side rotating frame 21. By adjusting the angle of the second side rotating frame 21, the finally unfolded driven link 18 forms a symmetrical clamping force on the tube wall through the clamping plate 22, which firmly fixes the device on both sides of tube walls of different sizes, realizing the positioning function of the tube groove clamping structure for the device.

[0047] In the second step, as the sliding disk 15 moves upward, it drives the piston assembly 31, which is fixedly installed at its lower end, to slide upward in a sealed manner inside the first piston cylinder 25. The piston head at the end of the piston assembly 31 is always positioned below the first inner wall flow channel group 28, ensuring complete compression of the gas inside the first piston cylinder 25. Through compression, the piston assembly 31 transports the gas inside the first piston cylinder 25 through the first inner wall flow channel group 28 to the second inner wall flow channel group 29 inside the second piston cylinder 26. The gas is evenly diffused into the cavity of the second piston cylinder 26 through this flow channel group. At this time, the gas is further evenly distributed inside the side steel pipe 24 fixed to the circumferential surface of the lower steel pipe 23 via the channel 38. In the third piston cylinder 27, the combined pressure of the third compression spring 42 and the third piston head 43 in the fourth piston cylinder 41 is greater than the pressure of the first compression spring 32 in the second piston cylinder 26 and the second compression spring 35 in the third piston cylinder 27. Therefore, the gas preferentially acts on the first piston head 33 and the second piston head 36. Under the sealing limit of the inner wall of the second piston cylinder 26, the first piston head 33 overcomes the elastic force of the first compression spring 32 and contracts, which simultaneously drives the first arc-shaped pressing elbow 34 fixed at the lower end to extend downward. Under the sealing limit of the inner wall of the third piston cylinder 27, the second piston head 36 overcomes the elastic force of the second compression spring 35 and contracts, which drives the second arc-shaped pressing elbow 37 fixed at the lower end to extend downward.

[0048] Third step, after the first arc-shaped pressing elbow 34 and the two second arc-shaped pressing elbows 37 extend to the limit, the first compression spring 32 and the second compression spring 35 cannot be compressed at this time. At this time, the screw 14 can continue to be rotated to keep the sliding plate 15 moving upward. The gas in the first piston cylinder 25 continues to be output and is transported through the air passage and air pipe 44 to the inside of the fourth piston cylinder 41 fixed on the circumferential surface support 39 of the lower steel pipe 23. The thrust generated by the gas overcomes the elastic force of the third compression spring 42 and pushes the third piston head 43 upward so that it keeps the fourth piston cylinder 41 in a sealed sliding position. This drives the sliding strip 45 fixed at the upper end of the third piston head 43 to move upward synchronously, increasing the length of the sliding strip 45 exposed above the fourth piston cylinder 41. This allows us to directly see whether the first arc-shaped pressing elbow 34 and the two second arc-shaped pressing elbows 37 have extended to the limit.

[0049] Fourthly, when fixing the device above the pipe and between the pipe trench, the operator should first rotate the screw 14 until the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 extend to their limits, and the third piston head 43 drives the sliding strip 45 to rise. At this time, the sliding plate 15 is close to the inner top of the upper steel pipe 11. The sliding plate 15 will then, through the slider 16 and the active connecting rod 19, cause the driven connecting rod 18 to be positioned on the upper inclined side of the first side rotating frame 17 under its limit. Therefore, it can be ensured that while the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 extend to their limits, the gas content inside the fourth piston cylinder 41 is also ensured. Subsequently, the operator can place the first arc-shaped pressing elbow 34 and the second arc-shaped pressing elbow 37 against the top of the pipe and reverse the screw 14. This causes the sliding disk 15 to descend, driving the driven link 18 to retract inward synchronously. Since the driven link 18 moves in a circle with the first side rotating frame 17 as the center, when the driven link 18 is parallel to the first side rotating frame 17, it is the longest dimension that the driven link 18 and the second side rotating frame 21 are fixed. Therefore, it can be ensured that the device is fixed inside the tube groove by the driven link 18 and the clamping plate 22 during the movement of the sliding disk 15. During the descent of the sliding disk 15, the piston assembly 31 will move downward inside the first piston cylinder 25. Therefore, under the pressure of the first compression spring 32 and the second compression spring 35, the first piston cylinder 25 (the initial gas is provided by the first piston cylinder 25) will automatically recover a certain amount of gas, and it is necessary to ensure that there is gas inside the fourth piston cylinder 41.

[0050] Fifth, once the multi-clamping structure is fully fixed and the arc-shaped pressing elbow is tightly fitted to the pipe, the gas in the first, second, third, and fourth piston cylinders forms a stable pressure balance. During the subsequent solidification of the fluidized soil, the pipe in the trench is prone to displacement due to factors such as soil shrinkage and settlement, causing some of the arc-shaped pressing elbows to lose rigid contact with the pipe surface. At this time, the gas pressure in the corresponding side piston cylinder decreases, and the adaptive driven pressurization structure is automatically activated. With the help of the elastic restoring force of the third compression spring 42 and the pressure transmission effect of the third piston head 43, the third compression spring 42 pushes the third piston head 43 downward, sending the gas in the fourth piston cylinder 41 to the corresponding empty side second piston cylinder 26 or third piston cylinder 27 through the air pipe 44. This continuously pushes the piston head to move the arc-shaped pressing elbow towards the pipe, achieving adaptive fitting between the arc-shaped pressing elbow and the pipe without manual intervention, always maintaining the pressing and limiting effect on the pipe, and preventing the pipe from floating.

[0051] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A pipeline anti-floating device, comprising an upper steel pipe (11), characterized in that: The upper steel pipe (11) is provided with a pipe groove clamping wall structure, which can fix the pipe anti-floating device in the pipe grooves with different spacings; The lower end of the upper steel pipe (11) is provided with a multi-directional clamping structure. The multi-directional clamping structure can press and limit the pipe in the pipe groove from multiple directions. The pipe groove clamping wall structure includes a side sliding groove (12) and a sliding disc (15). The multi-sided clamping structure is provided with an adaptive pneumatic flow channel. The adaptive pneumatic flow channel can cooperate with the clamping movement of the pipe groove clamping wall structure to adaptively fit the multi-sided clamping structure to the pipe surface, and can still stably fit even when the pipe is not parallel. The multi-clamping structure has an adaptive driven pressurization structure on its circumferential surface. When the position of the pipe changes, the adaptive driven pressurization structure will automatically pressurize the adaptive pneumatic flow channel, so that the multi-clamping structure always fits the pipe surface.

2. The pipeline anti-floating device as described in claim 1, characterized in that, Both of the side sliding grooves (12) are opened on the side wall of the upper steel pipe (11), and a through groove (13) is opened between the side sliding grooves (12). A screw rod (14) is threaded on the inner side of the upper steel pipe (11), and the sliding plate (15) is rotatably installed at the end of the screw rod (14).

3. The pipeline anti-floating device as described in claim 1, characterized in that, The sliding disk (15) is slidably installed with the upper steel pipe (11). Slider (16) is symmetrically fixedly installed on the circumferential surface of the sliding disk (15). Both sliders (16) pass through the through groove (13) and are slidably installed inside the side sliding groove (12). The first side rotating frame (17) is symmetrically fixedly installed on the circumferential surface of the upper steel pipe (11).

4. The pipeline anti-floating device as described in claim 3, characterized in that, Both first side rotating frames (17) are rotatably mounted with driven connecting rods (18) on their inner sides. A driving connecting rod (19) is rotatably mounted between the slider (16) and the driven connecting rod (18). A second side rotating frame (21) is rotatably mounted at the end of the driven connecting rod (18). A clamping plate (22) is fixedly mounted on the side wall of the second side rotating frame (21).

5. The pipeline anti-floating device according to any one of claims 1-4, characterized in that, The multi-clamping structure includes a lower steel pipe (23), which is fixedly connected to the lower end of the upper steel pipe (11). Side steel pipes (24) are symmetrically fixedly installed on the circumferential surface of the lower steel pipe (23). A first piston cylinder (25) and a second piston cylinder (26) are fixedly installed inside the lower steel pipe (23). The second piston cylinder (26) is located below the first piston cylinder (25) and fixedly connected. A channel (38) is opened inside the side steel pipe (24). A third piston cylinder (27) is fixedly installed inside the channel (38). The interior of the third piston cylinder (27) is connected to the interior of the channel (38) and the interior of the second piston cylinder (26).

6. The pipeline anti-floating device as described in claim 5, characterized in that, The adaptive pneumatic flow channel includes a first inner wall in-circuit flow channel group (28), which is located inside the first piston cylinder (25). A second inner wall in-circuit flow channel group (29) is located inside the second piston cylinder (26). The first inner wall in-circuit flow channel group (28) and the second inner wall in-circuit flow channel group (29) are connected. A piston assembly (31) is fixedly installed at the lower end of the sliding disk (15). The piston assembly (31) is located inside the first piston cylinder (25) and is sealed and slidably installed.

7. The pipeline anti-floating device as described in claim 6, characterized in that, The piston head at the end of the piston assembly (31) is located below the inner passage group (28) of the first inner wall. A first compression spring (32) is fixedly installed on the inner side of the second piston cylinder (26). A first piston head (33) is fixedly installed on the top of the first compression spring (32). The first piston head (33) and the second piston cylinder (26) are sealed and slidably installed. A first arc-shaped pressing elbow (34) is fixedly installed at the lower end of the first piston head (33). The first arc-shaped pressing elbow (34) and the second piston cylinder (26) are sealed and slidably installed. The first arc-shaped pressing elbow (34) is located inside the first compression spring (32). The pressing part of the first arc-shaped pressing elbow (34) is located outside the second piston cylinder (26).

8. The pipeline anti-floating device as described in claim 7, characterized in that, A second compression spring (35) is fixedly installed inside the third piston cylinder (27). A second piston head (36) is fixedly installed on the top of the second compression spring (35). The second piston head (36) is slidably installed with the third piston cylinder (27). A second arc-shaped pressing elbow (37) is fixedly installed at the lower end of the second piston head (36). The second arc-shaped pressing elbow (37) is located inside the second compression spring (35). The second arc-shaped pressing elbow (37) is slidably installed with the third piston cylinder (27). The pressing part of the second arc-shaped pressing elbow (37) is located outside the third piston cylinder (27).

9. The pipeline anti-floating device as described in claim 1, characterized in that, The adaptive driven pressurization structure includes a bracket (39), which is fixedly installed on the circumferential surface of the lower steel pipe (23). A fourth piston cylinder (41) is fixedly installed on the side wall of the bracket (39). A third compression spring (42) is symmetrically fixedly installed inside the fourth piston cylinder (41). A third piston head (43) is fixedly installed between the ends of the third compression spring (42).

10. The pipeline anti-floating device as described in claim 9, characterized in that, The third piston head (43) and the fourth piston cylinder (41) are sealed and slidably installed. The air inlet at the lower end of the fourth piston cylinder (41) is fixedly connected to the interior of the third piston cylinder (27) and the second piston cylinder (26) by an air pipe (44). The upper end of the third piston head (43) is fixedly connected to a sliding strip (45). The sliding strip (45) is sealed and slidably installed with the fourth piston cylinder (41) and extends partially above the fourth piston cylinder (41).

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