Hoisting mechanism for construction of reconstruction and extension expressway

Abstract

The invention relates to the technical field of construction hoisting, in particular to a hoisting mechanism for reconstruction and extension highway construction, which comprises an internal expansion type support frame, one end of the internal expansion type support frame is detachably connected with a cart, the top of the internal expansion type support frame is provided with a hook ring, and the internal expansion type support frame comprises an adjustable support assembly and a power assembly. The adjustable supporting assembly is used for conducting radial expansion supporting from the interior of a construction pipeline, and the power assembly is in driving connection with the adjustable supporting assembly through the telescopic assembly. Through an internal supporting mode, direct pressure of external clamping on a concrete pipeline is avoided, the pipeline is effectively prevented from being broken, meanwhile, rapid positioning and hoisting are achieved through the cart and the telescopic assembly, and the construction efficiency and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of construction hoisting technology, specifically to hoisting mechanisms used in the reconstruction and expansion of highways. Background Technology

[0002] In the process of highway reconstruction and expansion, pipeline laying is a crucial task. Pipelines not only undertake important functions such as fluid transportation and drainage, but their laying quality and efficiency also directly affect the progress and quality of the entire highway project. In particular, when heavy concrete pipes are involved, the construction difficulty and complexity increase significantly. Due to the large mass and inertia of heavy pipes, it is very laborious to manually move and align them, which affects the overall construction progress. Therefore, specialized hoisting equipment is required for their handling and laying. When existing hoisting mechanisms move such pipes, they mostly clamp and position the pipes externally before moving them. The problem with this method is that, since the internal stress of concrete pipes is much lower than that of metal pipes, direct external clamping can easily cause them to break. Therefore, it is often difficult to balance the clamping and moving with the protection of concrete pipes. Therefore, in view of the above-mentioned problems, this technical solution designs a hoisting mechanism for the construction of highway reconstruction and expansion. Summary of the Invention

[0003] The purpose of this invention is to provide a hoisting mechanism for the construction of highways for reconstruction and expansion, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The hoisting mechanism for the reconstruction and expansion of the highway includes an internally expanded support frame, one end of which is detachably connected to a trolley. The top of the internally expanded support frame, which is placed outside the construction pipeline, is equipped with a hook ring, which is connected to the hoisting device. The internal expansion support frame includes an adjustable support component that provides radial expansion support to the inside of the construction pipeline and a power component that drives the adjustable support component. The power component is located outside the construction pipeline and is detachably connected to the drive end of the adjustable support component. A connecting support base is connected to the side of the adjustable support component away from the power component. The end of the connecting support base is connected to the trolley with a rotation limit snap-fit. A horizontally distributed telescopic component is installed on the top through a main bracket. A vertical auxiliary bracket is installed at the end of the telescopic component through a connecting rod. The bottom end of the auxiliary bracket is fixedly connected to the power component.

[0005] As a further aspect of the present invention: the power assembly includes a motor housing fixed to the bottom of the auxiliary support, the motor housing contains a servo motor, the output end of the servo motor extends to the outside of the motor housing and is connected to a power sleeve, and the inner wall of the power sleeve is provided with a plurality of positioning keyways parallel to the axis of the power sleeve at equal intervals.

[0006] As a further embodiment of the present invention: the adjustable support assembly includes a threaded cylinder fixed on the end of the connecting support base on the side opposite to the trolley. Three sets of rectangular sliding groove plates are installed radially outward at the connection between the threaded cylinder and the connecting support base. A screw is threadedly connected inside the threaded cylinder. A guide rod is installed at the end of the screw away from the threaded cylinder. A sleeve is installed at the end of the guide rod. A collar is fitted on the guide rod. A movable sleeve is installed on the side of the collar facing the threaded cylinder. A fixed ring is installed on the outer wall of both sides of the movable sleeve. Three U-shaped swing shaft frames are installed at equal intervals along the outer wall of the fixed ring. The swing shaft frames are rotatably connected to the front swing rods through the swing shafts. The top ends of the two front swing rods in the same plane parallel to the axis of the threaded cylinder are rotatably connected to the support rods through the swing shafts. An arc-shaped support plate is installed on the top of the support rod. An L-shaped sliding plate is installed at the end of the arc-shaped support plate facing the connecting support base. A slider is installed on the vertical surface of the L-shaped sliding plate. A rectangular sliding groove opened inside the rectangular sliding groove plate is slidably connected to the end of the slider. A positioning key is installed on the outer circumferential wall of the sleeve, and the positioning key slides with the positioning keyway on the inner side of the power sleeve.

[0007] As a further aspect of the present invention: a lifting stroke limit component is provided on the upper side of the inside of the rectangular slide groove to limit the lifting height of the slider inside the rectangular slide groove. The component includes an upper limit plate that slides inside the rectangular slide groove. An adjusting screw is connected to the top of the upper limit plate by a rotating connector. The adjusting screw is threaded through a threaded hole opened on the top of the rectangular slide groove plate and extends outward to install a rotating handle.

[0008] As a further aspect of the present invention: the rotary connector includes a T-shaped sliding hole opened inside the top of the upper limit plate, a T-shaped slider is rotatably connected inside the T-shaped sliding hole, and the top of the T-shaped slider is fixedly connected to the bottom of the adjusting screw through a connecting rod.

[0009] As a further aspect of the present invention: a locking hole is provided in the end wall of the connecting support base facing the trolley, and a locking pin is installed on the trolley corresponding to the locking hole.

[0010] As a further aspect of the present invention: the telescopic assembly includes a hydraulic cylinder housing fixed to the horizontal end of the main support, the hydraulic cylinder housing contains a hydraulic cylinder, the output end of the hydraulic cylinder is connected to a hydraulic rod extending to the outside of the hydraulic cylinder housing, the end of the hydraulic rod is fixedly connected to a connecting rod, a sleeve block is installed at the bottom of the hook ring, the sleeve block is sleeved on the hydraulic rod, and one side of the bottom is fixed to the main support by a positioning rod.

[0011] As a further aspect of the present invention: the arc-shaped structure at the top of the arc-shaped support plate is fully fitted with the interior of the construction pipe to be supported.

[0012] As a further aspect of the present invention, a reinforcing rod is installed at the connection between the auxiliary support and the connecting rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By adopting an internally expanding support frame, radial expansion support is provided from inside the construction pipeline, avoiding stress concentration on the concrete pipeline caused by external clamping and effectively preventing pipeline rupture during hoisting.

[0014] By using a trolley and telescopic components, the support position can be quickly adjusted, simplifying the positioning process for pipeline hoisting and improving construction efficiency.

[0015] The mechanism can be adapted to construction pipes of different diameters by adjusting the components, thus enhancing its versatility and flexibility. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a hoisting mechanism used for the reconstruction and expansion of a highway.

[0017] Figure 2 A schematic diagram of the main structure of a hoisting mechanism used for the reconstruction and expansion of a highway.

[0018] Figure 3 A partial structural diagram of a hoisting mechanism used for the reconstruction and expansion of a highway.

[0019] Figure 4 for Figure 1 A magnified structural diagram of A in the diagram.

[0020] Figure 5 for Figure 3 An enlarged structural diagram of B in the diagram.

[0021] Figure 6 for Figure 1 An enlarged structural diagram of C.

[0022] Figure 7 A schematic diagram of the rotating connecting component in a hoisting mechanism used for the reconstruction and expansion of a highway.

[0023] The components include: hook ring 10, trolley 11, servo motor 12, motor box 13, main support 14, auxiliary support 15, hydraulic cylinder 16, hydraulic rod 17, connecting rod 18, connecting support base 19, locking hole 20, locking pin 21, power sleeve 22, sleeve rod 23, threaded cylinder 24, screw 25, moving sleeve 26, fixing ring 27, swing shaft frame 28, front swing rod 29, support rod 30, rear swing rod 31, arc-shaped support plate 32, L-shaped sliding plate 33, slider 34, rectangular sliding groove plate 35, rectangular sliding groove 36, upper limit plate 37, connecting rod 38, T-shaped slider 39, T-shaped sliding hole 40, adjusting screw 41, threaded hole 42, handle 43, construction pipe 44, and positioning key 45. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Please see Figures 1-3The hoisting mechanism for the reconstruction and expansion of the highway includes an internally expanded support frame. One end of the internally expanded support frame is detachably connected to a trolley 11. The trolley 11 is used to control the internally expanded support frame to move axially along the inside of the construction pipeline 44 to be supported and hoisted, and to adjust the position of the internally expanded support frame supporting the inner wall of the construction pipeline 44. The top of the internally expanded support frame, which is placed outside the construction pipeline 44, is equipped with a hook ring 10, which is connected to the hoisting device. The internally expanding support frame includes an adjustable support assembly that provides radial expansion support to the inner side of the construction pipeline 44 and a power assembly that drives the adjustable support assembly. The power assembly is located outside the construction pipeline 44 and is detachably connected to the drive end of the adjustable support assembly. A connecting support base 19 is connected to the side of the adjustable support assembly away from the power assembly. The end of the connecting support base 19 is connected to the trolley 11 with a limited-rotation snap-fit ​​connection. Horizontally distributed telescopic components are installed on the top via a main bracket 14. Vertical auxiliary brackets 15 are installed at the ends of the telescopic components via connecting rods 18. The bottom of the frame 15 is fixedly connected to the power component. The telescopic component is used to control the connection or separation of the power component and the adjustable support component. At the beginning of the installation, the distance between the power component and the adjustable support component is increased to the length of the construction pipe 44. At this time, the construction pipe 44 is placed between the power component and the adjustable support component. Then, with the movement of the trolley 11, the adjustable support component is moved into the construction pipe 44. At the same time, the telescopic component is activated to control the power component to move continuously into the construction pipe 44 until it is connected to the adjustable support component, providing it with extended power. Specifically, the hook ring 10 is mounted on the telescopic assembly, and its bottom is positioned on the main bracket 14 by a fixing rod to keep the hook ring 10 fixed and not affect the normal operation of the telescopic assembly; See Figures 1-7 The power assembly includes a motor housing 13 fixed to the bottom of the auxiliary support 15. The motor housing 13 houses a servo motor 12. The output end of the servo motor 12 extends to the outside of the motor housing 13 and is connected to a power sleeve 22. The inner wall of the power sleeve 22 is provided with multiple positioning keyways parallel to the axis of the power sleeve 22 at equal intervals. The adjustable support assembly includes a threaded cylinder 24 fixed to the end of the connecting support base 19 on the side opposite to the trolley 11. Three sets of rectangular sliding plates 35 are radially outwardly and circumferentially installed at the connection between the threaded cylinder 24 and the connecting support base 19. A screw 25 is threadedly connected inside the threaded cylinder 24. A guide rod is installed at the end of the screw 25 away from the threaded cylinder 24, and a sleeve 23 is installed at the end of the guide rod. A collar is fitted onto the guide rod, and the collar is in a non-rotating state relative to the guide rod while simultaneously moving axially with the guide rod. Because the screw 25 is threadedly connected to the threaded cylinder 24, when the sleeve 23 drives the guide rod to rotate, it controls the screw 25 to move axially within the threaded cylinder 24. At this time, the collar moves synchronously with the screw 25. A movable sleeve 26 is installed on the side of the collar facing the threaded cylinder 24, and the movable sleeve 26 follows the collar. Synchronous movement: A fixed ring 27 is installed on the outer circumferential walls of both sides of the movable sleeve 26. Three U-shaped swing shaft frames 28 are installed at equal intervals along the outer wall of the fixed ring 27. The swing shaft frames 28 are rotatably connected to the front swing rods 29 through the swing shafts. The tops of the two front swing rods 29 in the same plane parallel to the axis of the threaded cylinder 24 are rotatably connected to the support rod 30 through the swing shafts. An arc-shaped support plate 32 is installed on the top of the support rod 30. An L-shaped sliding plate 33 is installed on the end of the arc-shaped support plate 32 facing the support base 19. A slider 34 is installed on the vertical surface of the L-shaped sliding plate 33. The end of the slider 34 is slidably connected to a rectangular groove 36 opened inside the rectangular groove plate 35. The slider 34 moves up and down along the inside of the rectangular groove 36, thereby limiting the lifting and swinging of the arc-shaped support plate 32. A positioning key 45 is installed on the outer circumferential wall of the sleeve 23. The positioning key 45 slides with the positioning keyway on the inner side of the power sleeve 22. Since the sleeve 23 moves axially synchronously when rotating, the servo motor 12 needs to continuously provide rotational thrust. Therefore, by using the limiting connection between the positioning key 45 and the positioning keyway, the continuous rotational push of the screw 25 can be maintained.

[0029] Preferably, a lifting stroke limiting component is movably provided on the upper side inside the rectangular slide groove 36 to limit the lifting height of the slider 34 inside the rectangular slide groove 36. The component includes an upper limit plate 37 that slides inside the rectangular slide groove 36. An adjusting screw 41 is connected to the top of the upper limit plate 37 by a rotating connector. The adjusting screw 41 is threaded through a threaded hole 42 opened on the top of the rectangular slide groove plate 35 and extends outward to install a handle 43. That is, by rotating the handle 43, the adjusting screw 41 is adjusted to lift and lower in the threaded hole 42, thereby adjusting the height of the upper limit plate 37 inside the rectangular slide groove 36, and realizing the movement adjustment of the slider 34 height. The rotating connector includes a T-shaped sliding hole 40 opened inside the top of the upper limit plate 37. A T-shaped slider 39 is rotatably connected inside the T-shaped sliding hole 40. The top of the T-shaped slider 39 is fixed to the bottom of the adjusting screw 41 through the connecting rod 38, thereby realizing the height adjustment of the upper limit plate 37 by the rear swing rod 31. It should be noted that, since the slider 34 has a sliding design along the inside of the rectangular groove 36, the collar can be positioned simultaneously outside the movable sleeve 26.

[0030] In this embodiment of the invention, a locking hole 20 is provided in the end wall of the connecting support base 19 facing the trolley 11, and a locking pin 21 is installed on the trolley 11 corresponding to the locking hole 20. The movement of the trolley 11 controls the locking pin 21 to engage with the locking hole 20, thereby connecting the trolley 11 to the connecting support base 19. Then, the position of the inner expansion support frame is adjusted by taking advantage of the mobility of the trolley 11. The hoisting equipment used in the construction of highway reconstruction and expansion projects usually includes truck cranes, all-terrain cranes, crawler cranes, etc. The specific use depends on the actual situation. Regardless of the type of hoisting equipment, when connecting it to this mechanism, its hoisting end is connected to the hook ring 10. Among them, the trolley 11 can directly utilize the mobility of the hoisting device locomotive, thereby saving the cost of providing an additional power source.

[0031] In one embodiment of the present invention, the telescopic assembly includes a hydraulic cylinder housing fixed to the horizontal end of the main support 14. The hydraulic cylinder housing contains a hydraulic cylinder 16. The output end of the hydraulic cylinder 16 is connected to a hydraulic rod 17 extending to the outside of the hydraulic cylinder housing. The end of the hydraulic rod 17 is fixedly connected to a connecting rod 18. At the same time, a sleeve block is installed at the bottom of the hook ring 10. The sleeve block is fitted onto the hydraulic rod 17, and one side of the bottom is fixed to the main support 14 by a positioning rod. The positioning rod supports the hook ring 10 to keep it in a stationary state. At the same time, when the hook ring 10 is connected to the lifting device, the hydraulic rod 17 can be directly controlled to drive the inner expansion support frame and the trolley 11 to rise. Preferably, the structure of the hydraulic cylinder 16 and the hydraulic rod 17 can also be replaced by a telescopic transmission form of a cylinder and piston rod. The specific choice can be determined according to the actual situation, and will not be elaborated here.

[0032] A reinforcing rod is installed at the connection between the auxiliary support 15 and the connecting rod 18 to enhance the stability of the connection between the two.

[0033] As a preferred embodiment of the present invention, the top arc-shaped structure of the arc-shaped support plate 32 is fully fitted with the inside of the construction pipe 44 to be supported, ensuring stable support for the inside of the construction pipe 44 from the inside out. For highway reconstruction and expansion projects, most concrete construction pipes 44 are between 2 and 5 meters in length. Therefore, when this mechanism hoists them and adjusts the distance between the power component and the adjustable support component, it does not need to occupy too much space. General telescopic components can be used to achieve this smoothly. At the same time, by adjusting the maximum lifting height of the rectangular slide plate 35, it is convenient to provide precise support for construction pipes 44 of different diameters.

[0034] The working principle of this invention is as follows: During idle periods in this device, all the aforementioned driving components (representing power elements, electrical devices, and compatible power supplies) are connected via wires. The electrical connections are completed in sequence between the working components. The detailed connection methods are well-known in the art. The following mainly describes the working principle and process, without further explanation of the electrical control. Connect the trolley 11 to the connecting support base 19 via the pin 21 and the locking hole 20. Activate the telescopic component: hydraulic cylinder 16 to fully extend it. Adjust the distance between the motor box 13, servo motor 12 and the adjustable support component to be greater than the length of the construction pipe 44. Place the construction pipe 44 in the gap between the power component and the adjustable support component. Operate the trolley 11 to move the entire internally expanding support frame connected to it, so that the adjustable support assembly is fully inserted into the construction pipe 44 and moved to the axial position of the pipe to be hoisted. Activate the telescopic assembly to retract it, pulling the power assembly through the auxiliary support 15 and connecting rod 18 into the construction pipe 44. Continue until the power sleeve 22 at the front end of the power assembly aligns with the sleeve rod 23 of the adjustable support assembly, ensuring that the positioning key 45 on the sleeve rod 23 slides into the positioning keyway on the inner wall of the power sleeve 22, forming a torque-transmitting connection. The servo motor 12 of the power unit is started, driving the power sleeve 22 to rotate, which in turn drives the sleeve rod 23 and the screw 25 to rotate synchronously. Since the screw 25 is threadedly engaged with the fixed threaded cylinder 24, the screw 25 moves axially outward toward the inside of the pipe while rotating. The movement of the screw 25 pushes the movable sleeve 26 on it forward.

[0035] When the movable sleeve 26 moves forward, the swing shaft frame 28 on the fixed ring 27 on both sides pushes the lower end of the front swing rod 29 forward. As the servo motor 12 continues to rotate, multiple arc-shaped support plates 32 expand radially in sync, and finally fit evenly and tightly against the inner wall of the construction pipe 44, forming a stable support from the inside out.

[0036] Connect the hook of the external hoisting device to the hook ring 10 at the top of the mechanism. The hoisting device slowly lifts the entire mechanism, along with the internally supported construction pipe 44. The trolley 11 can move along with or detach from the connecting support base 19 to transport the pipe and accurately place it in the preset laying position.

[0037] After the pipe is placed in position, the reverse servo motor 12 causes the screw 25 to rotate in the opposite direction and retract, driving the moving sleeve 26 to move backward, thereby causing the arc-shaped support plate 32 to retract radially and detach from the inner wall of the pipe. Finally, by operating the trolley 11 or the telescopic assembly, the entire internally expanding support frame is removed from the construction pipe 44, completing one hoisting operation.

[0038] It should be understood that in this application, all rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slippage or wear, and each part is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that all parts in this application are made of metal or plastic materials with suitable strength in the relevant field to ensure that their structural rigidity meets the actual requirements.

[0039] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A hoisting mechanism for the construction of an upgraded and expanded highway, characterized in that: It includes an internally expanded support frame, one end of which is detachably connected to a trolley (11). The top of the internally expanded support frame, which is placed outside the construction pipe (44), is equipped with a hook ring (10), which is connected to a hoisting device. The internal expansion support frame includes an adjustable support component that provides radial expansion support to the inside of the construction pipeline (44) and a power component that drives the adjustable support component. The power component is located outside the construction pipeline (44) and is detachably connected to the drive end of the adjustable support component. A connecting support base (19) is connected to the side of the adjustable support component away from the power component. The end of the connecting support base (19) is connected to the trolley (11) with a limited rotation snap-fit. A horizontally distributed telescopic component is installed on the top through the main bracket (14). A vertical auxiliary bracket (15) is installed at the end of the telescopic component through the connecting rod (18). The bottom end of the auxiliary bracket (15) is fixedly connected to the power component.

2. The hoisting mechanism for highway reconstruction and expansion construction according to claim 1, characterized in that, The power assembly includes a motor housing (13) fixed at the bottom of the auxiliary support (15). The motor housing (13) contains a servo motor (12). The output end of the servo motor (12) extends to the outside of the motor housing (13) and is connected to a power sleeve (22). The inner wall of the power sleeve (22) is provided with multiple positioning keyways parallel to the axis of the power sleeve (22) at equal intervals.

3. The hoisting mechanism for highway reconstruction and expansion construction according to claim 2, characterized in that, The adjustable support assembly includes a threaded cylinder (24) fixed to the end of the connecting support base (19) on the side opposite to the trolley (11). Three sets of rectangular sliding plates (35) are radially outwardly circumferentially installed at the connection between the threaded cylinder (24) and the connecting support base (19). A screw (25) is threadedly connected inside the threaded cylinder (24). A guide rod is installed at the end of the screw (25) away from the threaded cylinder (24). A sleeve (23) is installed at the end of the guide rod. A collar is fitted on the guide rod. A movable sleeve (26) is installed on the side of the collar facing the threaded cylinder (24). A fixed ring (27) is installed on the outer circumferential walls of both sides of the movable sleeve (26). Three U-shaped swing shaft frames (28) are installed at equal intervals along the outer wall. The swing shaft frames (28) are rotatably connected to the front swing rods (29) through the swing shafts. The tops of the two front swing rods (29) in the same plane parallel to the axis of the threaded cylinder (24) are rotatably connected to the support rods (30) through the swing shafts. An arc-shaped support plate (32) is installed on the top of the support rods (30). An L-shaped sliding plate (33) is installed on the end of the arc-shaped support plate (32) facing the support base (19). A slider (34) is installed on the vertical surface of the L-shaped sliding plate (33). A rectangular groove (36) is slidably connected to the end of the slider (34) inside the rectangular groove plate (35). A positioning key (45) is installed on the outer circumferential wall of the sleeve (23), and the positioning key (45) slides with the positioning keyway on the inner side of the power sleeve (22).

4. The hoisting mechanism for highway reconstruction and expansion construction according to claim 3, characterized in that, The upper side of the rectangular slide (36) is provided with a lifting stroke limit component to limit the lifting height of the slider (34) inside the rectangular slide (36). It includes an upper limit plate (37) that slides inside the rectangular slide (36). The top of the upper limit plate (37) is connected to an adjusting screw (41) by a rotating connector. The adjusting screw (41) is threaded through a threaded hole (42) opened on the top of the rectangular slide plate (35) and extends outward to install a handle (43).

5. The hoisting mechanism for highway reconstruction and expansion construction according to claim 4, characterized in that, The rotating connector includes a T-shaped sliding hole (40) opened inside the top of the upper limit plate (37), and a T-shaped slider (39) is rotatably connected inside the T-shaped sliding hole (40). The top of the T-shaped slider (39) is fixedly connected to the bottom of the adjusting screw (41) through a connecting rod (38).

6. The hoisting mechanism for highway reconstruction and expansion construction according to claim 5, characterized in that, The connecting support base (19) has a locking hole (20) in the end wall facing the trolley (11), and a locking pin (21) is installed on the trolley (11) corresponding to the locking hole (20).

7. The hoisting mechanism for highway reconstruction and expansion construction according to claim 6, characterized in that, The telescopic assembly includes a hydraulic cylinder housing fixed to the horizontal end of the main support (14), the hydraulic cylinder housing contains a hydraulic cylinder (16), the output end of the hydraulic cylinder (16) is connected to a hydraulic rod (17) extending to the outside of the hydraulic cylinder housing, the end of the hydraulic rod (17) is fixedly connected to a connecting rod (18), the bottom of the hook ring (10) is equipped with a sleeve block, the sleeve block is fitted on the hydraulic rod (17), and one side of the bottom is fixed to the main support (14) by a positioning rod.

8. The hoisting mechanism for highway reconstruction and expansion construction according to claim 7, characterized in that, The arc-shaped structure at the top of the arc-shaped support plate (32) is fully fitted to the inside of the construction pipe (44) to be supported.

9. The hoisting mechanism for highway reconstruction and expansion construction according to claim 8, characterized in that, A reinforcing rod is installed at the connection between the auxiliary support (15) and the connecting rod (18).

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