A sliding support for pipe jacking and its assembly method

Abstract

This invention discloses a sliding support for pipe jacking and its assembly method, belonging to the technical field of pipe jacking construction equipment. The sliding support includes two base plates, with a first support plate positioned above the base plates. A sliding cavity is formed inside the first support plate, and a second support plate is longitudinally slidably connected within the sliding cavity. Adjustment components are provided at both ends of the first support plates to adjust the longitudinal distance between the base plates and the lower support plate. A connecting component is provided between the two first support plates to strengthen the structural strength between the two first support plates and the base plates. This invention, through the adjustment component, can automatically adapt to changes in the height and arc-shaped undulations of the inner wall of the bottom end of the pipe caused by foundation settlement, completely solving the support failure problem caused by pipe bending and inner wall subsidence in existing devices; thus improving the support stability of the sliding support.

Description

Technical Field

[0001] This invention belongs to the technical field of pipe jacking construction equipment, specifically a sliding support inside a pipe jacking system and its assembly method. Background Technology

[0002] Pipe jacking is a crucial technique for laying underground pipelines. Sliding supports are typically installed inside the pipe jacking system to support, assist in moving the working pipe, and ensure its stable installation and positioning within the jacking structure. The structural rationality and height adjustment capability of the sliding supports directly determine the stability of the working pipe, the uniformity of stress distribution, and the overall safety of the pipe jacking construction.

[0003] Existing sliding supports for pipe jacking mostly adopt fixed height or simple mechanical adjustment structures. They are generally composed of bottom support, casters, and upper and lower support structures. The working pipe is clamped by the upper and lower support trays, and the movement inside the pipe is achieved by the bottom casters. Some supports are height-adjustable by power components such as electric push rods and motors to adapt to the support requirements of working pipes at different heights.

[0004] However, existing sliding supports for pipe jacking and their usage still have significant shortcomings: Firstly, due to factors such as foundation settlement and uneven geology, the pipe jacking is prone to bending and deformation, causing changes in the height of the inner wall at the bottom of the pipe, which significantly affects the supporting effect of the sliding supports. If the sliding supports are connected to the working pipe without clamping, the supports are prone to detaching from the pipe and losing their supporting function; if clamping is used, the bottom of the supports is prone to detaching from the inner wall of the pipe, resulting in the supports being suspended in mid-air, which not only fails to effectively support the pipe but also increases the additional load on the pipe. Although some sliding supports use motors, electric actuators, etc., to adjust the support height to cope with the height difference caused by foundation settlement, in long-distance pipe jacking construction, this type of electric adjustment not only significantly increases the difficulty of power supply and wiring costs but also increases the equipment failure rate and maintenance costs. Secondly, foundation settlement will cause the inner wall of the bottom of the jacking pipe to form an arc-shaped undulating surface. However, the existing sliding support base plate is mostly an integral rigid structure, and the casters are fixedly connected to the base plate, which cannot adapt to the arc-shaped changes of the inner wall of the jacking pipe. When the support and the pipe are not clamped, either the casters are in contact with the inner wall of the jacking pipe but the support plate is tilted, which can easily cause damage to the working pipe after long-term use; or the support plate is in contact with the working pipe, but some casters cannot contact the inner wall of the jacking pipe, resulting in a reduction in the number of casters under force and excessive local stress, which can easily cause damage to the casters after long-term use. When the support and the pipe are clamped, the same problem will occur: uneven force on the casters and some casters will be suspended, which will seriously affect the service life and movement stability of the sliding support.

[0005] Therefore, it is necessary to provide a new sliding support for pipe jacking and its assembly method to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and proposes a sliding support in pipe jacking and its assembly method; it can adapt to foundation settlement, solve the problem of support failure, and improve support stability.

[0007] This invention is achieved through the following technical solution:

[0008] A sliding support for a jacking pipe includes two base plates. A first support plate is positioned above each base plate, and a sliding cavity is formed inside the first support plate. A second support plate is longitudinally slidably connected within the sliding cavity. A lower support tray is fixedly connected to the top of the two second support plates, and an upper support tray is bolted to the top of the lower support tray. The lower and upper support trays cooperate to clamp the working pipe inside the jacking pipe. Adjustment components are provided at both ends of each first support plate to adjust the longitudinal distance between the base plate and the lower support tray. A connecting component is provided between the two first support plates to strengthen the structural strength between the two first support plates and the base plate. Multiple casters are symmetrically connected to the bottom of the base plates, and the casters are symmetrically arranged along the axial direction of the upper support tray.

[0009] Furthermore, the adjustment assembly includes L-shaped rods, with two L-shaped rods symmetrically arranged at both ends of the first support plate; each L-shaped rod is composed of a longitudinally arranged long rod and a transversely arranged short rod fixedly connected, and the short rods of the two L-shaped rods located in the same first support plate are arranged opposite to each other; both ends of the second support plate are provided with first grooves, and the long rods are located in the first grooves; multiple sets of limiting grooves are equidistantly provided on the side of the first groove opposite to the long rod, and a limiting block is installed at the top of the long rod, with the limiting block and the limiting groove being inserted into each other; a rotating seat is symmetrically fixedly connected to the top of the base plate, and a sliding sleeve is rotatably connected to the top of the rotating seat, with the sliding sleeve sleeved on the outside of the short rod.

[0010] Furthermore, a first rotating rod is fixedly connected to the corner of the L-shaped rod. A torsion spring is provided on the outer wall of the first rotating rod. One end of the torsion spring is fixedly connected to the first rotating rod, and the other end of the torsion spring is fixedly connected to the inner wall of the first support plate. The torsion spring always has an elastic force that twists the first rotating rod and drives the L-shaped rod to rotate toward the short rod side, so as to make the limiting block disengage from the limiting groove.

[0011] Furthermore, a first groove is provided at the top of the long rod, and the limiting block slides in the first groove; a first spring is provided in the first groove; one end of the first spring is fixedly connected to the limiting block, and the other end of the first spring is fixedly connected to the inner wall of the first groove, and the first spring always has an elastic force to push the limiting block out of the first groove.

[0012] Furthermore, the height of the limiting groove is greater than the height of the limiting block to provide redundant space, making it convenient for the limiting block to rotate out of the limiting groove along with the L-shaped rod.

[0013] Furthermore, the bottom of the second support plate is symmetrically provided with second grooves, and each second groove is provided with a second spring. The top end of the second spring is fixedly connected to the inner wall of the second groove, and the bottom end of the second spring is fixedly connected to the inner wall of the sliding cavity. The second spring always has an elastic force that pushes the first support plate and the second support plate to slide in opposite directions.

[0014] Furthermore, multiple sliding rods are symmetrically fixedly connected to the top of the base plate, and a second sliding groove is symmetrically opened at the bottom of the first support plate. A slider is slidably connected inside the second sliding groove, and the bottom of the slider is fixedly connected to the sliding rod. A surrounding plate is fixedly connected to the top of the base plate, and the inner wall of the surrounding plate is in contact with the outer wall of the first support plate.

[0015] Furthermore, the connecting assembly includes an upper connecting seat, with two upper connecting seats fixedly connected to each of the two adjacent sides of the two first support plates. A connecting rod is fixedly connected to the bottom of the upper connecting seat, and two lower connecting seats fixedly connected to each of the two adjacent sides of the bottom plates. A connecting hole is provided in the middle of the lower connecting seat, and the connecting rod is slidably connected to the connecting hole. Each upper connecting seat is connected to the lower connecting seat on the other side through a connecting rod.

[0016] Furthermore, a connecting groove is provided at the top of the two first support plates facing each other, and a connecting block is provided in the connecting groove. The two sides of the connecting block are respectively fixedly connected to the corresponding second support plate.

[0017] The assembly method of the sliding support includes the following steps:

[0018] S1. Lift the first support plate and press the second support plate to the bottom of the sliding cavity;

[0019] S2. Move the first support plate downwards so that the caster wheel contacts and presses against the bottom wall of the jacking pipe until the upper surface of the bottom plate is in contact with the lower surface of the first support plate.

[0020] S3. Release the second support plate, hold the base plate, move the sliding support to below the working pipe, lift the first support plate, and control the lifting and lowering of the second support plate to make the lower support plate fit against the bottom of the working pipe.

[0021] S4. Connect and secure the upper support tray to the lower support tray.

[0022] The beneficial effects of this invention compared to the prior art are as follows:

[0023] 1. Adaptive foundation settlement solves the problem of support failure and improves support stability:

[0024] This invention, through the coordinated operation of the adjusting component, the second spring, and the connecting component, can automatically adapt to changes in the height and arc-shaped undulations of the inner wall of the jacking pipe bottom caused by foundation settlement, completely solving the support failure problem caused by pipe bending and inner wall subsidence in existing devices. When foundation settlement causes the inner wall of the jacking pipe bottom to descend, the first support plate can drive the adjusting component to slide downwards. The redundant space formed by the limiting block and the limiting groove provides a range of motion for the L-shaped rod to rotate. The torsion spring drives the L-shaped rod to rotate, causing the limiting block to disengage from the limiting groove, releasing the limiting constraints of the first and second support plates. Subsequently, under the elastic force of the second spring, the first support plate slides downwards until the universal wheel is in contact with the inner wall of the jacking pipe. Finally, the height is fixed by resetting the L-shaped rod and re-inserting the limiting block. The entire adjustment process requires no manual intervention and no power components such as motors or electric push rods. It is completed automatically by relying on mechanical structure and spring force, ensuring that the lower and upper support trays always stably clamp the working pipe, and the universal wheels at the bottom of the base plate are always in contact with the inner wall of the jacking pipe. This not only avoids the problem of the support separating from the pipe when using non-clamping support, but also solves the defects of the support being suspended and increasing the burden on the pipe when using clamping fixation, significantly improving the stability and reliability of the working pipe support.

[0025] 2. Optimize structural design to adapt to the curved changes in the inner wall of the jacking pipe, extending the service life of the equipment:

[0026] This invention employs two symmetrically spaced base plates, instead of the one-piece molded base plate used in existing technologies. The reserved gaps can adapt to the arc-shaped undulations of the inner wall of the jacking pipe caused by foundation settlement, avoiding the problem of uneven force on the casters caused by a one-piece base plate. Simultaneously, the casters at the bottom of the base plates are symmetrically arranged along the working pipe axis. Combined with the guiding action of the sliding rod, slider, and second sliding groove, this ensures that the first support plate and the base plate can only slide relative to each other longitudinally, avoiding lateral displacement. The surrounding plate can cover the gap between the first support plate and the base plate, preventing debris from entering and affecting the sliding of components, further protecting the equipment structure. Furthermore, the height of the limiting groove in the adjusting assembly is greater than the height of the limiting block, providing redundant space for the limiting block to rotate and disengage, preventing the limiting block from getting stuck. The reasonable matching of the elastic forces of the first spring and the torsion spring ensures that the limiting block can flexibly enter and exit the limiting groove and that the L-shaped rod can smoothly rotate and reset, reducing component wear. The above structural optimization enables the sliding support to adapt to the arc-shaped changes of the inner wall of the jacking pipe, ensuring uniform force on the casters, avoiding damage to the casters caused by excessive local force, and reducing frictional wear of various components, effectively extending the service life of the entire sliding support.

[0027] 3. Reduced usage and maintenance costs, adaptable to long-distance pipe jacking construction needs:

[0028] This invention abandons the existing technology's reliance on motors, electric actuators, and other power components for height adjustment. Instead, it achieves adaptive height adjustment through a purely mechanical structure and spring force, eliminating the need for external power supply. This significantly reduces the difficulty of power supply and wiring costs in long-distance pipe jacking construction, while also avoiding maintenance costs and downtime losses caused by power component failures. Furthermore, the connection methods of each key component have been optimized: the casters and base plate, and the upper and lower support trays are all bolted together, facilitating disassembly and replacement after component wear; the upper connecting seat and the first support plate, and the lower connecting seat and the base plate are welded together, with the connecting rod and connecting hole slidingly engaged, ensuring structural strength while facilitating equipment assembly and subsequent maintenance. The entire device has a simple structure and highly interchangeable parts, eliminating the need for complex debugging procedures, further reducing usage and maintenance costs, and adapting to the complex environment and low-cost requirements of long-distance pipe jacking construction.

[0029] 4. Easy assembly and simple operation, improving construction efficiency:

[0030] The assembly process of the sliding support of this invention is simple and clear, requiring no complex tools or professional skills. The specific assembly process can be completed in four steps: "pressing the second support plate—moving the base plate to make the casters fit against the inner wall of the jacking pipe—adjusting the height of the second support plate to make the lower support tray fit against the pipe—bolting the upper support tray." This is convenient and time-saving. Simultaneously, the sliding support achieves smooth movement along the axial direction of the working pipe through the casters, facilitating the laying and position adjustment of the working pipe. The height adjustment process is completed automatically without manual intervention, significantly reducing the workload of construction personnel and improving the overall efficiency of pipe jacking construction. Furthermore, the structural design of each component of the device conforms to actual construction needs, allowing for flexible disassembly and assembly, facilitating equipment transportation and on-site installation, further adapting to the convenience requirements of pipe jacking construction. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of the sliding support inside the jacking pipe provided by the present invention;

[0032] Figure 2 This is a schematic diagram of the second support plate.

[0033] Figure 3 This is a schematic diagram of the upper connecting seat;

[0034] Figure 4 This is one of the schematic diagrams of the cross-sectional structure of the first support plate;

[0035] Figure 5 This is the second schematic diagram of the cross-sectional structure of the first support plate;

[0036] Figure 6 This is a schematic diagram of the cross-sectional structure of the second support plate;

[0037] Figure 7 This is a schematic diagram of the cross-sectional structure of the L-shaped rod;

[0038] Figure 8 This is a schematic diagram of the structure on the other side of the L-shaped rod;

[0039] Figure 9 for Figure 6 An enlarged view of part A shown.

[0040] Labels in the diagram: 1. Base plate; 2. First support plate; 3. Sliding cavity; 4. Second support plate; 5. Lower support tray; 6. Upper support tray; 7. Caster wheel; 8. L-shaped rod; 9. Long rod; 10. Short rod; 11. First groove; 12. Limiting groove; 13. Limiting block; 14. Rotating seat; 15. Sliding sleeve; 16. First rotating rod; 17. Torsion spring; 18. First sliding groove; 19. First spring; 20. Upper connecting seat; 21. Connecting rod; 22. Connecting hole; 23. Second groove; 24. Second spring; 25. Sliding rod; 26. Second sliding groove; 27. Sliding block; 28. Connecting groove; 29. ​​Connecting block; 30. Bolt; 31. Enclosure plate; 32. Lower connecting seat. Detailed Implementation

[0041] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0042] Please see Figures 1 to 9 This embodiment proposes a sliding support for a jacking pipe. The sliding support includes two base plates 1, each with a first support plate 2 on top. The first support plate 2 has a sliding cavity 3 inside, and a second support plate 4 is longitudinally slidably connected inside the sliding cavity 3. The tops of the two second support plates 4 are fixedly connected to the same lower support tray 5, and the tops of the lower support tray 5 are fixedly connected to an upper support tray 6 by bolts 30. The lower support tray 5 and the upper support tray 6 cooperate to clamp the working pipe inside the jacking pipe. Each of the first support plates 2 has an adjustment component at both ends, which is used to adjust the longitudinal distance between the base plate 1 and the lower support tray 5. A connecting component is provided between the two first support plates 2 to strengthen the structural strength between the two first support plates 2 and the base plate 1. The bottom of each base plate 1 is symmetrically fixedly connected to multiple casters 7 by bolts 30, and the multiple casters 7 are symmetrically arranged along the axial direction of the upper support tray 6.

[0043] It should be noted that: the two base plates 1 are symmetrically arranged at intervals, with a certain gap between them, which can adapt to the arc-shaped undulations of the inner wall of the bottom of the jacking pipe caused by foundation settlement, and avoid the problem of uneven force caused by the integral molding of the base plates 1; the size of the sliding cavity 3 is adapted to the size of the second support plate 4, ensuring that the second support plate 4 slides smoothly and without jamming in the longitudinal direction in the sliding cavity 3, while limiting the lateral displacement of the second support plate 4; the lower support plate 5 and the upper support plate 6 are both provided with arc-shaped grooves adapted to the shape of the working pipe on the opposite side, which improves the clamping stability of the working pipe and avoids damage to the outer wall of the pipe during clamping; the bolts 30 are made of corrosion-resistant and high-strength materials, which are suitable for the humid and impurity-rich working environment inside the jacking pipe, and prevent the bolts 30 from rusting and failing after long-term use; the universal wheels 7 are selected from wear-resistant and high-load-bearing models, and their symmetrical arrangement can ensure the overall force of the sliding support is balanced, which makes it easy for the sliding support to move smoothly along the axial direction of the working pipe inside the jacking pipe, and the universal wheels 7 are bolted to the base plate 1, which is convenient for disassembly and replacement after wear.

[0044] like Figures 5 to 9 As shown, the adjustment assembly includes L-shaped rods 8, with two L-shaped rods 8 symmetrically arranged at both ends of the first support plate 2. Each L-shaped rod 8 is composed of a longitudinally arranged long rod 9 and a transversely arranged short rod 10 fixedly connected. The short rods 10 of the two L-shaped rods 8 located in the same first support plate 2 are arranged opposite to each other. Both ends of the second support plate 4 are provided with first grooves 11, and the long rod 9 is located in the first groove 11. Multiple sets of limiting grooves 12 are equidistantly provided on the side of the first groove 11 opposite to the long rod 9. A limiting block 13 is installed at the top of the long rod 9, and the limiting block 13 is inserted into the limiting groove 12. The top of the base plate 1 is symmetrically and fixedly connected to a rotating seat 14, and the top of the rotating seat 14 is rotatably connected to a sliding sleeve 15, which is sleeved on the outside of the short rod 10. The corner of the L-shaped rod 8 is fixedly connected to a first rotating rod 16, and the outer wall of the first rotating rod 16 is provided with a torsion spring 17. One end of the torsion spring 17 is fixedly connected to the first rotating rod 16, and the other end of the torsion spring 17 is fixedly connected to the inner wall of the first support plate 2. The torsion spring 17 always has an elastic force to twist the first rotating rod 16 and cause the first rotating rod 16 to drive the L-shaped rod 8 to rotate toward the side of the short rod 10, so that the limiting block 13 is disengaged from the limiting groove 12. A first groove 18 is provided at the top of the long rod 9, and the limiting block 13 slides within the first groove 18. A first spring 19 is provided within the first groove 18. One end of the first spring 19 is fixedly connected to the limiting block 13, and the other end of the first spring 19 is fixedly connected to the inner wall of the first groove 18. The first spring 19 always has an elastic force to push the limiting block 13 out of the first groove 18. The height of the limiting groove 12 is greater than the height of the limiting block 13 to provide redundant space, so that the limiting block 13 can rotate out of the limiting groove 12 with the L-shaped rod 8.

[0045] It should be noted that: the number of limiting grooves 12 is flexibly designed according to actual use, and the spacing between two adjacent sets of limiting grooves 12 is set according to the possible settlement of the jacking pipe, ensuring that after foundation settlement, the support height can be precisely adjusted through the cooperation of the limiting block 13 and the limiting grooves 12 at different heights; the depth of the first groove 11 is greater than the length of the long rod 9, to avoid interference between the long rod 9 and the inner wall of the first groove 11 when the L-shaped rod 8 rotates or moves longitudinally; the sliding sleeve 15 and the short rod 10 are in sliding fit, ensuring that the short rod 10 can slide flexibly in the sliding sleeve 15 when the L-shaped rod 8 rotates, while the sliding sleeve 15 and the rotating seat 14 rotate. The first rotating rod 16 is rotatably connected to the first support plate 2, ensuring that the torsion spring 17 can smoothly drive the first rotating rod 16 to rotate the L-shaped rod 8. The size of the first sliding groove 18 is adapted to the size of the limiting block 13 and the first spring 19, limiting the sliding direction of the limiting block 13 and preventing the limiting block 13 from deviating and failing to accurately insert into the limiting groove 12. The elastic force of the first spring 19 is set to be able to stably push the limiting block 13 into the limiting groove 12, and at the same time be able to compress smoothly when the limiting block 13 is squeezed, ensuring that the limiting block 13 can flexibly enter and exit the limiting groove 12.

[0046] like Figures 4 to 6 As shown, the bottom of the second support plate 4 is symmetrically provided with second grooves 23, and each second groove 23 is provided with a second spring 24. The top end of the second spring 24 is fixedly connected to the inner wall of the second groove 23, and the bottom end of the second spring 24 is fixedly connected to the inner wall of the sliding cavity 3. The second spring 24 always has an elastic force that pushes the first support plate 2 and the second support plate 4 to slide in opposite directions. The top of the base plate 1 is symmetrically fixedly connected with multiple sliding rods 25, and the bottom of the first support plate 2 is symmetrically provided with second sliding grooves 26. The inside of the second sliding grooves 26 is slidably connected with sliders 27, and the bottom of the sliders 27 is fixedly connected to the sliding rods 25. The top of the base plate 1 is fixedly connected with a surrounding plate 31, and the inner wall of the surrounding plate 31 is in contact with the outer wall of the first support plate 2.

[0047] It should be noted that the elastic force of the second spring 24 is slightly less than the weight of the working pipe, and the elastic force of the second spring 24 is greater than the elastic force of the torsion spring 17; the enclosure plate 31 is used to cover the gap between the first support plate 2 and the bottom plate 1 to prevent debris from entering after the first support plate 2 and the bottom plate 1 slide.

[0048] like Figures 1 to 3As shown, the connecting assembly includes an upper connecting seat 20. Two upper connecting seats 20 are fixedly connected to each of the two adjacent sides of the two first support plates 2. A connecting rod 21 is fixedly connected to the bottom of the upper connecting seat 20. Two lower connecting seats 32 are fixedly connected to each of the two adjacent sides of the two base plates 1. A connecting hole 22 is provided in the middle of the lower connecting seat 32. The connecting rod 21 is slidably connected to the connecting hole 22. Each upper connecting seat 20 is connected to the lower connecting seat 32 on the other side through the connecting rod 21. A connecting groove 28 is provided at the top of the two first support plates 2 facing each other. A connecting block 29 is provided in the connecting groove 28. The two sides of the connecting block 29 are fixedly connected to the corresponding second support plate 4.

[0049] It should be noted that the connecting block 29 and the connecting component are both for strengthening the structural strength between the two first support plates 2 and the base plate 1, so that the two first support plates 2 can slide relative to each other during operation without separating or tilting. The upper connecting seat 20 and the first support plate 2, and the lower connecting seat 32 and the base plate 1 are all fixed by welding to ensure connection strength and prevent detachment after long-term stress. The outer diameter of the connecting rod 21 is matched with the inner diameter of the connecting hole 22 to ensure smooth longitudinal sliding of the connecting rod 21 in the connecting hole 22 and to prevent lateral swaying. The length of the connecting rod 21 is greater than the maximum relative sliding distance between the first support plate 2 and the base plate 1 to prevent the connecting rod 21 from coming out of the connecting hole 22 during the sliding process and to ensure the continuity of the connecting components. The connecting block 29 and the second support plate 4 are fixed by welding. The size of the connecting block 29 is matched with the connecting groove 28 to ensure that the connecting block 29 can move synchronously with the second support plate 4 in the connecting groove 28. At the same time, it plays a connecting and limiting role for the two second support plates 4, ensuring the synchronous lifting and lowering of the two second support plates 4, thereby ensuring the levelness of the lower support tray 5 and preventing the working pipeline from tilting due to asynchronous lifting and lowering of the two second support plates 4.

[0050] This embodiment proposes a method for assembling a sliding support inside a jacking pipe, including:

[0051] S1. Lift the first support plate 2 and press the second support plate 4 to the bottom of the sliding cavity 3;

[0052] S2. Move the first support plate 2 downward so that the caster 7 contacts and presses against the bottom wall of the jacking pipe until the upper surface of the bottom plate 1 is in contact with the lower surface of the first support plate 2.

[0053] S3. Release the hand pressing the second support plate 4, hold the base plate 1, move the sliding support to the bottom of the working pipe, lift the first support plate 2 with one hand, and control the second support plate 4 to raise and lower it with the other hand, so that the lower support plate 5 fits against the bottom of the working pipe.

[0054] S4. Connect and fix the upper support tray 6 and the lower support tray 5 with bolts 30.

[0055] The working principle of this invention is as follows:

[0056] When foundation settlement causes the inner wall of the jacking pipe to drop, the base plate 1 first loses the support of the inner wall of the jacking pipe. Since the working pipe is firmly clamped by the lower support tray 5 and the upper support tray 6, the second support plate 4 is suspended on the working pipe under the action of the lower support tray 5 and will not fall with the base plate 1. This is because the working pipe has a certain bending resistance. When there is room for movement, the second spring 24 will extend. The extension of the second spring 24 has a force along its axis to both ends. The upward elastic force of the second spring 24 can serve as part of the force supporting the working pipe. The base plate 1 and the caster 7 will drop as the inner wall of the bottom of the jacking pipe settles. Under the action of the second spring 24, the caster 7 will always be in contact with the inner wall of the jacking pipe. Moreover, the jacking pipe descent process is completed in a short time. The support of the second spring 24, combined with the bending resistance of the working pipe itself, can ensure that the working pipe itself is not greatly affected by the settlement, thus maintaining its original position.

[0057] As the jacking pipe descends, the second spring 24, which was originally compressed, begins to release its elastic potential energy. The second spring 24 supports the second support plate 4 upwards and applies downward pressure to the first support plate 2. Under this pressure, the first support plate 2 drives the adjusting component and the connecting component to slide downwards together. The sliding distance is exactly equal to the height difference between the limiting groove 12 and the limiting block 13. After sliding, the bottom surface of the limiting block 13 remains in contact with the bottom inner wall of the limiting groove 12, while the top surface of the limiting block 13 is completely separated from the top inner wall of the limiting groove 12. Sufficient redundant space is formed above the limiting block 13, which provides ample range of motion for the subsequent rotation of the limiting block 13 with the L-shaped rod 8, ensuring that the limiting block 13 can smoothly disengage from the limiting groove 12.

[0058] Subsequently, under its own weight and with the driving force of the torsion spring 17, the base plate 1 begins to slide downwards. The torsion spring 17 always has an elastic force that twists the first rotating rod 16 and drives the L-shaped rod 8 to rotate around its connection point with the first support plate 2. Under the continuous drive of the torsion spring 17, the first rotating rod 16 drives the L-shaped rod 8 to rotate smoothly. When the L-shaped rod 8 rotates, its horizontally arranged short rod 10 slides flexibly in the sliding sleeve 15. The sliding sleeve 15 rotates synchronously around the rotating seat 14 with the movement of the short rod 10, providing a stable support point for the rotation of the L-shaped rod 8 and ensuring that the rotation of the L-shaped rod 8 is smooth and without jamming. As the L-shaped rod 8 continues to rotate, the limiting block 13 at the top of its longitudinally arranged long rod 9 gradually separates from the limiting groove 12 on the side wall of the first groove 11. When the limiting block 13 completely disengages from the limiting groove 12, the limiting constraint between the first support plate 2 and the second support plate 4 is released, and the two can achieve longitudinal relative sliding, making full preparation for the subsequent height adjustment steps.

[0059] Next, because the second spring 24 always has an elastic force that pushes the first support plate 2 and the second support plate 4 to slide in opposite directions, and the limiting constraint between the first support plate 2 and the second support plate 4 has been completely released, the second support plate 4 remains firmly connected to the working pipe under the action of the lower support tray 5 and the upper support tray 6, and cannot move downward. Therefore, under the elastic force of the second spring 24, the first support plate 2 begins to slide downward. During the downward sliding process of the first support plate 2, it drives the base plate 1, the adjusting component, and the connecting component to move downward together until all the universal wheels 7 at the bottom of the base plate 1 are in contact with and tightly fitted to the inner wall of the bottom end of the descended jacking pipe, ensuring that the base plate 1 can obtain stable support and avoiding uneven force on the universal wheels 7. After the caster wheel 7 is in contact with the inner wall of the jacking pipe, the first support plate 2 continues to slide downward under the continuous elastic force of the second spring 24. At this time, the first support plate 2 gradually approaches the bottom plate 1. The bottom plate 1, through the rotating seat 14 fixedly connected to the top, drives the sliding sleeve 15 to apply a pushing force to the L-shaped rod 8, so that the L-shaped rod 8 overcomes the elastic force of the torsion spring 17 and gradually returns to its original position until the bottom of the first support plate 2 is completely in contact with the top of the bottom plate 1. At this time, the long rod 9 of the L-shaped rod 8 returns to its initial state of being perpendicular to the bottom plate 1.

[0060] During the resetting process of the L-shaped rod 8, the limiting block 13 at the top of its long rod 9 will contact and be squeezed against the side wall of the first groove 11 on the second support plate 4. Under the action of the squeezing force, the limiting block 13 compresses the first spring 19 in the first slide groove 18 and gradually retracts into the first slide groove 18, avoiding interference between the limiting block 13 and the side wall of the first groove 11, and ensuring that the L-shaped rod 8 can be successfully reset. After the L-shaped rod 8 is reset, if the limiting block 13 is aligned with the limiting groove 12, the first spring 19 will reset and push the limiting block 13 into the limiting groove 12; otherwise, it will remain in the first slide groove 18. After the working pipeline has been working for a long time, it will sink a short distance. This sinking distance is much smaller than the sinking height of the jacking pipe, which will not affect the normal laying and use of the working pipeline, nor will it cause damage to the pipeline. When the first support plate 2 is fully attached to the base plate 1 and the L-shaped rod 8 is reset, the squeezing force of the side wall of the first groove 11 on the limiting block 13 disappears. At this time, the limiting block 13 is reset under the elastic force of the first spring 19 and extends out of the first slide groove 18. At this time, the limiting block 13 is precisely aligned with the corresponding limiting groove 12 on the side wall of the first groove 11. The limiting block 13 is smoothly inserted into the limiting groove 12, so that the top surface of the limiting block 13 is in close contact with the inner wall of the top of the limiting groove 12, thereby achieving limiting and fixing. Thus, the entire height adaptive adjustment process is completed.

[0061] After height adjustment, the sliding support returns to a stable working state: all the casters 7 at the bottom of the base plate 1 are tightly fitted with the inner wall of the bottom of the jacking pipe, ensuring uniform force distribution on the sliding support and preventing damage to the casters 7 due to excessive local force; the lower support tray 5 and the upper support tray 6 always stably clamp the working pipe, preventing the pipe from shifting, falling off, or being damaged; the connecting rod 21 and the connecting hole 22 in the connecting assembly maintain a stable sliding connection, and the connecting block 29 and the connecting groove 28 are tightly fitted, effectively strengthening the overall structural strength and preventing the two first support plates 2 from separating or tilting. The entire adjustment process does not require motors, electric push rods, or other power components, and is completed automatically entirely by mechanical structure and spring force. This effectively solves the problems of sliding support failure and uneven force distribution caused by foundation settlement, while also reducing power supply difficulty and equipment use and maintenance costs, adapting to the complex needs of long-distance pipe jacking construction.

[0062] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here.

[0063] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sliding support for a jacking pipe, characterized in that, It includes two base plates (1), each base plate (1) is provided with a first support plate (2) above it, the first support plate (2) has a sliding cavity (3) inside, and a second support plate (4) is longitudinally slidably connected in the sliding cavity (3); the top of the two second support plates (4) is fixedly connected to the same lower support tray (5), and the top of the lower support tray (5) is fixedly connected to an upper support tray (6) by bolts (30). The lower support tray (5) and the upper support tray (6) cooperate to clamp the working pipe inside the jacking pipe; each of the first support plates (2) is provided with an adjustment component at both ends, which adjusts... The joint assembly is used to adjust the longitudinal distance between the base plate (1) and the lower support tray (5); a connecting assembly is provided between the two first support plates (2), which is used to strengthen the structural strength between the two first support plates (2) and the base plate (1); multiple casters (7) are symmetrically connected to the bottom of the base plate (1), and the multiple casters (7) are symmetrically arranged along the axial direction of the upper support tray (6); the adjustment assembly includes an L-shaped rod (8), and two L-shaped rods (8) are symmetrically arranged at both ends of the first support plate (2); each L-shaped rod (8) consists of a longitudinally arranged long rod (9) and a horizontal... The short rods (10) are fixedly connected to the first support plate (2), and the short rods (10) of the two L-shaped rods (8) are arranged opposite each other; the two ends of the second support plate (4) are provided with first grooves (11), and the long rod (9) is located in the first groove (11); multiple sets of limiting grooves (12) are equidistantly provided on the side of the first groove (11) opposite to the long rod (9), and a limiting block (13) is installed at the top of the long rod (9), and the limiting block (13) is inserted into the limiting groove (12); the top of the base plate (1) is symmetrically fixedly connected with a rotating seat (14), and the rotating seat ( The top of 14) is rotatably connected to a sliding sleeve (15), which is sleeved on the outside of the short rod (10). The corner of the L-shaped rod (8) is fixedly connected to a first rotating rod (16). The outer wall of the first rotating rod (16) is provided with a torsion spring (17). One end of the torsion spring (17) is fixedly connected to the first rotating rod (16), and the other end of the torsion spring (17) is fixedly connected to the inner wall of the first support plate (2). The torsion spring (17) always has an elastic force to twist the first rotating rod (16) and drive the L-shaped rod (8) to rotate toward the side of the short rod (10), so that the limiting block (13) is disengaged from the limiting groove (12). The bottom of the second support plate (4) is symmetrically provided with second grooves (23), and each of the second grooves (23) is provided with a second spring (24). The top end of the second spring (24) is fixedly connected to the inner wall of the second groove (23), and the bottom end of the second spring (24) is fixedly connected to the inner wall of the sliding cavity (3). The second spring (24) always has an elastic force that pushes the first support plate (2) and the second support plate (4) to slide in opposite directions. The connecting assembly includes an upper connecting seat (20), two upper connecting seats (20) are fixedly connected to each of the two first support plates (2) on adjacent sides, a connecting rod (21) is fixedly connected to the bottom of the upper connecting seat (20), two lower connecting seats (32) are fixedly connected to each of the two base plates (1) on adjacent sides, a connecting hole (22) is provided in the middle of the lower connecting seat (32), and the connecting rod (21) is slidably connected to the connecting hole (22); one of the upper connecting seats (20) is connected to the other lower connecting seat (32) through the connecting rod (21); the other upper connecting seat (20) is connected to the other lower connecting seat (32) through the connecting rod (21).

2. A sliding support for a jacking pipe according to claim 1, characterized in that, The top of the long rod (9) is provided with a first groove (18), and the limiting block (13) slides in the first groove (18); a first spring (19) is provided in the first groove (18); one end of the first spring (19) is fixedly connected to the limiting block (13), and the other end of the first spring (19) is fixedly connected to the inner wall of the first groove (18). The first spring (19) always has an elastic force to push the limiting block (13) out of the first groove (18).

3. A sliding support for a jacking pipe according to claim 2, characterized in that, The height of the limiting groove (12) is greater than the height of the limiting block (13) to provide redundant space so that the limiting block (13) can rotate out of the limiting groove (12) along with the L-shaped rod (8).

4. A sliding support for a jacking pipe according to claim 1, characterized in that, The top of the base plate (1) is symmetrically fixedly connected with multiple sliding rods (25), and the bottom of the first support plate (2) is symmetrically provided with a second sliding groove (26). The inside of the second sliding groove (26) is slidably connected with a slider (27), and the bottom of the slider (27) is fixedly connected to the sliding rod (25). The top of the base plate (1) is fixedly connected with a surrounding plate (31), and the inner wall of the surrounding plate (31) is in contact with the outer wall of the first support plate (2).

5. A sliding support for a jacking pipe according to claim 1, characterized in that, The top of the two first support plates (2) facing each other is provided with a connecting groove (28), and a connecting block (29) is provided in the connecting groove (28). The two sides of the connecting block (29) are respectively fixedly connected to the corresponding second support plate (4).

6. The assembly method of the sliding support according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Lift the first support plate (2) and press the second support plate (4) to the bottom of the sliding cavity (3); S2. Move the first support plate (2) downward so that the caster wheel (7) contacts and presses against the bottom wall of the jacking pipe until the upper surface of the bottom plate (1) is in contact with the lower surface of the first support plate (2). S3. Release the second support plate (4), hold the bottom plate (1), move the sliding support to the bottom of the working pipe, lift the first support plate (2), and control the second support plate (4) to lift and lower, so that the lower support plate (5) fits against the bottom of the working pipe. S4. Connect and fix the upper support tray (6) and the lower support tray (5).

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