Adjustable hoisting device for large-diameter pipeline installation

Abstract

The invention relates to the technical field of pipeline installation, in particular to an adjustable hoisting device for large-diameter pipeline installation. Comprising two upper arc plates, the ends of the lower plates are connected with lower plates through connecting pieces, first driving pieces and second driving pieces are arranged in the connecting pieces, fixing frames are detachably fixed to the upper ends of the upper arc plates, sliding blocks are arranged on the fixing frames in the vertical direction in a sliding mode, the two sliding blocks are fixedly connected with a suspension arm, and a rotating disc is rotationally arranged in the fixing frames; the axial direction of the rotating disc is perpendicular to the sliding direction of the sliding block, a main shaft is rotationally connected to the fixing frame, a groove corresponding to the rotating disc is formed in the sliding block, an elastic piece is fixed in the groove, an elastic insulation piece is fixed to the upper end of the elastic piece, and a first contact and a second contact are fixed to one end of the rotating disc. Through linkage control of the first driving piece, the second driving piece and the clamping blocks in the arc-shaped grooves, automatic concentric adjustment and synchronous locking are achieved when the upper arc plate and the lower arc plate clamp the pipeline.

Description

Technical Field

[0001] This invention relates to the field of pipeline installation technology, specifically to an adjustable hoisting device for installing large-diameter pipelines. Background Technology

[0002] In modern large-scale infrastructure construction, petrochemical transportation, and municipal pipeline network projects, the transportation and installation of large-diameter pipelines (typically referring to pipelines with a diameter exceeding 1.0 meter) are core construction phases. Due to their large size, significant weight, and limited structural rigidity, these pipelines are prone to deformation and even structural damage during hoisting due to localized stress concentration. Traditional hoisting methods often employ flexible slings or rigid clamps for multi-point fixation, which have significant technical drawbacks: First, manually adjusting the clamp position and clamping force is time-consuming and labor-intensive, making it difficult to ensure uniform circumferential stress on the pipeline; second, the concentricity of the pipeline and clamps depends on operational experience, and installation deviations can easily lead to misalignment of pipeline interfaces; third, after hoisting to the installation position, personnel must intervene at height to unlock the clamps, posing significant safety risks. Currently, the industry urgently needs an intelligent hoisting system with automatic centering locking, synchronous linkage release, and no need for manual intervention to solve the structural protection and operational safety issues of large-diameter pipelines throughout the entire process of transportation, hoisting, and precise positioning. Summary of the Invention

[0003] The main objective of this invention is to provide a device for conveniently hoisting pipes of different diameters.

[0004] To achieve the above objectives, the technical solution provided by this invention is as follows: An adjustable hoisting device for installing large-diameter pipes includes two upper arc plates, with each lower plate connected to a lower plate at its end via a connector. The connector contains a first driving component and a second driving component. The first driving component, when activated, drives the lower plate to rotate. The second driving component, when activated, allows the entire connector to rotate outwards from both the upper and lower arc plates. This rotation of the connector limits the movement of the lower plate. A fixed frame is detachably fixed to the upper end of each upper arc plate. Two sliders are slidably mounted vertically on the fixed frame and are fixedly connected to a boom. A turntable is rotatably mounted within the fixed frame, with its axial direction perpendicular to the sliding direction of the sliders. A main shaft is rotatably connected to the fixed frame and transmitted through a transmission assembly. The component is connected to the turntable. A groove corresponding to the turntable is formed on the slider, and an elastic sheet is fixed inside the groove. An elastic insulating sheet is fixed to the upper end of the elastic sheet. A first contact and a second contact are fixed to one end of the turntable, symmetrically arranged vertically. The elastic sheet, the first contact, the first driving component, the power supply, and the controller are electrically connected. The elastic sheet, the second contact, the second driving component, the power supply, and the controller are also electrically connected. A one-way gear ring is mounted on the main shaft, and a first rack is fixed on the slider. During the downward movement of the slider and the first rack, the one-way gear ring causes the main shaft to rotate. After the main shaft stops rotating, the turntable rotates 180 degrees. During the upward movement of the slider and the first rack, the one-way gear ring rotates freely. During the downward movement of the slider, when the elastic sheet is blocked by the upper end of the turntable, the elastic sheet and the elastic insulating sheet deform, and the elastic sheet sequentially connects to the first and second contacts. During the upward movement of the slider, when the elastic insulating sheet is blocked by the lower end of the turntable, the elastic insulating sheet and the elastic sheet can deform. The elastic insulating sheet contacts the first contact and the second contact in sequence. Under the blocking effect of the elastic insulating sheet, the elastic sheet is not electrically connected to the first contact and the second contact.

[0005] Specifically, the upper arc plate has an opening facing downwards, and the two upper arc plates are symmetrically arranged on the left and right. The lower plate is an arc-shaped plate located below the end of the upper arc plate. After the connector rotates as a whole and limits the lower plate, the lower plate and the upper arc plate are concentric, and the inner edges of the upper arc plate and the lower plate are circular.

[0006] Specifically, the connector includes a first connecting seat and a second connecting seat. A rotating rod is fixed to the upper end of the first connecting seat, and a sleeve is rotatably sleeved on the outside of the rotating rod. The sleeve is fixedly connected to the lower end of the second connecting seat. A first driving member is fixed inside the lower end of the second connecting seat. The first driving member can drive the rotating rod and the first connecting seat to rotate. An arc-shaped groove is opened at the end of the upper arc plate and the outer edge of the lower plate. An arc-shaped locking block is slidably engaged in the arc-shaped groove. The locking block in the arc-shaped groove of the upper arc plate is fixedly connected to the upper end of the second connecting seat, and the locking block in the arc-shaped groove of the lower plate is fixedly connected to the lower end of the first connecting seat. A second driving member is installed in the locking block. The second driving member can drive the locking block to slide in the arc-shaped groove. When the upper arc plate and the lower plate are concentric and their inner edges are circular, the arc-shaped groove of the lower plate and the arc-shaped groove of the upper arc plate are concentric.

[0007] Specifically, the first driving component includes a first motor, which is fixed inside the lower end of the second connecting seat, and the output shaft of the first motor is concentrically fixedly connected to the rotating rod; the second driving component includes a clearance hole opened on the clamping block, a gear rotatably disposed in the clearance hole, an arc-shaped mounting groove opened in the groove wall of the arc-shaped groove, an arc-shaped second rack fixed in the mounting groove, the gear meshing with the second rack, a second motor fixed in the clamping block, a first rotating shaft concentrically fixed on the output shaft of the second motor, and the first rotating shaft concentrically fixedly connected to the gear; the elastic sheet, the first contact, the first motor, the power supply and the controller are electrically connected, and the elastic sheet, the second contact, the second motor, the power supply and the controller are also electrically connected.

[0008] Specifically, two lifting rings are fixed at the upper end of the boom, and the two lifting rings are arranged symmetrically.

[0009] Specifically, a vertical groove is provided in the fixed frame, the slider is slidably engaged in the vertical groove, one end of the turntable extends into the vertical groove, and the first contact point and the second contact point are fixed on one end of the turntable in the vertical groove.

[0010] Specifically, the transmission assembly includes a second pulley fixedly connected to the main shaft, a worm gear rotatably mounted in a fixed frame above the main shaft, a first pulley fixed on the worm gear, the first pulley and the second pulley being connected by a belt drive, a second rotating shaft fixedly mounted on a turntable, and a worm wheel fixedly mounted on the second rotating shaft, the worm wheel meshing with the worm gear.

[0011] Specifically, the one-way gear ring includes an outer gear ring, inside which a one-way bearing is disposed. The outer ring of the one-way bearing is fixedly connected to the outer gear ring, and the inner ring of the one-way bearing is sleeved and fixed on the main shaft. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The lower plate automatically adjusts and locks synchronously when clamping the pipe using the first driving component. This mechanism can adapt to different pipe diameter errors, ensuring uniform circumferential stress on the pipe and avoiding pipe deformation or damage to the anti-corrosion layer caused by local stress concentration. It is especially suitable for non-destructive hoisting of large-diameter thin-walled pipes.

[0012] 2. Based on the switching sequence of the first and second contacts triggered by the downward movement of the slider, the system autonomously completes the closed-loop action of closing the lower plate, rotating and limiting the connecting parts, and rotating the worm gear drive turntable. No manual intervention is required to adjust the clamping force and locking angle, which significantly reduces the risk of high-altitude operations and improves hoisting efficiency and positioning accuracy.

[0013] 3. During the upward lifting phase, the elastic insulating sheet physically isolates the drive circuit, preventing unlocking. Upon unlocking, the reverse rotation of the first and second motors resets the connector and opens the lower plate. After pipe installation, the device automatically releases, avoiding scratch damage to the pipe wall during disassembly using traditional rigid clamps. The 180° turntable rotation mechanism ensures contact state reset, providing immediate response for the next lifting cycle.

[0014] 4. The upper and lower arc plates are assembled using standardized connectors. By increasing the number of upper and lower arc plates, the system can accommodate the multi-point coordinated hoisting requirements of ultra-long pipelines. The transmission components within the fixed frame adopt a closed integrated design, reducing the mechanical failure rate caused by environmental dust intrusion and enhancing adaptability to complex working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention.

[0016] Figure 2 This is a schematic diagram showing the connection between the upper arc plate and the lower plate.

[0017] Figure 3 This is a sectional view of the connector.

[0018] Figure 4 This is a schematic diagram showing the card block located within the arc-shaped groove.

[0019] Figure 5 This is a schematic diagram of the second driving component.

[0020] Figure 6 for Figure 5 A magnified view of region A in the middle.

[0021] Figure 7 This is a schematic diagram of the first connector.

[0022] Figure 8 This is a schematic diagram of the second connector.

[0023] Figure 9 This is a schematic diagram showing the concentricity of the upper and lower curved plates.

[0024] Figure 10 This is a schematic diagram of the connector after it has been rotated as a whole.

[0025] Figure 11 This is a schematic diagram of the transmission assembly.

[0026] Figure 12 for Figure 11 A magnified view of region B in the middle.

[0027] Figure 13 This is a sectional view with a fixed frame.

[0028] Figure 14 for Figure 13 A magnified view of region C in the middle.

[0029] Figure 15 This is a schematic diagram of the turntable.

[0030] Figure 16 This is a schematic diagram showing the connection between the slider and the boom.

[0031] Figure 17 This is a schematic diagram showing the deformation of the elastic sheet and elastic insulating sheet during the downward movement of the slider.

[0032] Figure 18 This is a schematic diagram showing the deformation of the elastic sheet and elastic insulating sheet during the upward movement of the slider.

[0033] Figure 19 This is a circuit diagram of the first and second motors before the turntable rotates.

[0034] Figure 20 The circuit diagrams for the first and second motors after the turntable rotates 180 degrees.

[0035] The components in the attached diagram are named as follows: 1. Upper arc plate; 2. Lower plate; 3. Fixing frame; 4. Lifting arm; 5. Lifting ring; 6. Slider; 7. First connecting seat; 8. Second connecting seat; 9. Arc groove; 10. Locking block; 11. First rotating shaft; 12. Mounting groove; 13. First motor; 14. Second motor; 15. Clearance hole; 16. Second rack; 17. Gear; 18. Rotating rod; 19. Sleeve; 20. First rack; 21. One-way gear ring; 22. Vertical groove; 23. Turntable; 24. Worm gear; 25. Second rotating shaft; 26. Worm; 27. First pulley; 28. Main shaft; 29. ​​Second pulley; 30. Belt; 31. Elastic sheet; 32. Elastic insulating sheet; 33. First contact point; 34. Second contact point; 35. Groove. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] like Figures 1-20 As shown, an adjustable hoisting device for installing large-diameter pipes includes two upper arc plates 1, with the openings of the upper arc plates 1 facing downwards, and the two upper arc plates 1 are symmetrically arranged on the left and right sides.

[0038] The lower plate 2 is connected to the ends of the upper arc plate 1 via connectors. The lower plate 2 is an arc-shaped plate and is located below the end of the upper arc plate 1. An anti-slip layer is provided on the inner edge of the lower plate 2.

[0039] The connector is equipped with a first driving component and a second driving component. After the first driving component is activated, it can drive the lower plate 2 to rotate. After the second driving component is activated, the connector as a whole can rotate outside the upper arc plate 1 and the lower plate 2. After the connector as a whole rotates, it can limit the lower plate 2. After the connector as a whole rotates and limits the lower plate 2, the lower plate 2 and the upper arc plate 1 are concentric, and the inner edges of the upper arc plate 1 and the lower plate 2 are circular.

[0040] The connector includes a first connecting seat 7 and a second connecting seat 8. A rotating rod 18 is fixed to the upper end of the first connecting seat 7. A sleeve 19 is rotatably sleeved on the outside of the rotating rod 18. The sleeve 19 is fixedly connected to the lower end of the second connecting seat 8. A first driving member is fixed inside the lower end of the second connecting seat 8. The first driving member can drive the rotating rod 18 and the first connecting seat 7 to rotate.

[0041] Both the upper arc plate 1 and the lower plate 2 have arc-shaped grooves 9 at their ends and outer edges, respectively. Arc-shaped locking blocks 10 are slidably engaged in the arc-shaped grooves 9. The locking blocks 10 in the arc-shaped grooves 9 of the upper arc plate 1 are fixedly connected to the upper end of the second connecting seat 8, and the locking blocks 10 in the arc-shaped grooves 9 of the lower plate 2 are fixedly connected to the lower end of the first connecting seat 7. A second driving component is installed in each locking block 10. The second driving component can drive the locking blocks 10 to slide in the arc-shaped grooves 9. When the upper arc plate 1 and the lower plate 2 are concentric and their inner edges are circular, the arc-shaped grooves 9 of the lower plate 2 and the arc-shaped grooves 9 of the upper arc plate 1 are concentric.

[0042] The upper arc plate 1 is detachably fixed to a fixing frame 3. Specifically, the upper end of the upper arc plate 1 and the lower end of the fixing frame 3 are fixedly connected by bolts. By replacing the upper arc plate 1 and lower plate 2 with different diameters, it is possible to clamp pipes of different diameters.

[0043] The fixed frame 3 is equipped with a slider 6 that slides vertically upwards. Specifically, the fixed frame 3 has a vertical groove 22, and the slider 6 slides and engages within the vertical groove 22.

[0044] Two sliders 6 are fixedly connected to the boom 4. Two lifting rings 5 ​​are fixed to the upper end of the boom 4, and the two lifting rings 5 ​​are arranged symmetrically.

[0045] A turntable 23 is rotatably mounted inside the fixed frame 3. One end of the turntable 23 extends into the vertical groove 22, and the axial direction of the turntable 23 is perpendicular to the sliding direction of the slider 6.

[0046] A main shaft 28 is rotatably connected to the fixed frame 3, and the main shaft 28 is connected to the turntable 23 through a transmission assembly.

[0047] The transmission assembly includes a second pulley 29 that is concentrically fixed to the main shaft 28. A worm gear 26 is rotatably mounted in the fixed frame 3 above the main shaft 28. A first pulley 27 is fixed on the worm gear 26. The first pulley 27 and the second pulley 29 are connected by a belt 30. A second rotating shaft 25 is concentrically fixed on the turntable 23. A worm wheel 24 is concentrically fixed on the second rotating shaft 25. The worm wheel 24 meshes with the worm gear 26.

[0048] The slider 6 has a groove 35 corresponding to the turntable 23. An elastic sheet 31 is fixed in the groove 35, and an elastic insulating sheet 32 ​​is fixed at the upper end of the elastic sheet 31.

[0049] One end of the turntable 23 is fixed with a first contact 33 and a second contact 34. The first contact 33 and the second contact 34 are fixed on one end of the turntable 23 in the vertical groove 22. The first contact 33 and the second contact 34 are arranged symmetrically in the upper and lower parts.

[0050] The elastic sheet 31, the first contact 33, the first drive element, the power supply and the controller are electrically connected, and the elastic sheet 31, the second contact 34, the second drive element, the power supply and the controller are electrically connected.

[0051] The first driving component includes a first motor 13, which is fixed inside the lower end of the second connecting seat 8. The output shaft of the first motor 13 is concentrically and fixedly connected to the rotating rod 18.

[0052] The second driving component includes a clearance hole 15 opened on the locking block 10, a gear 17 rotatably disposed in the clearance hole 15, an arc-shaped mounting groove 12 opened in the groove wall of the arc-shaped groove 9, an arc-shaped second rack 16 fixed in the mounting groove 12, the gear 17 meshing with the second rack 16, a second motor 14 fixed in the locking block 10, a first rotating shaft 11 concentrically fixed on the output shaft of the second motor 14, and the first rotating shaft 11 concentrically fixedly connected to the gear 17.

[0053] Specifically, the elastic sheet 31, the first contact 33, the first motor 13, the power supply and the controller are electrically connected, and the elastic sheet 31, the second contact 34, the second motor 14, the power supply and the controller are electrically connected.

[0054] A one-way gear ring 21 is installed on the main shaft 28, and a first rack 20 is fixed on the slider 6. During the downward movement of the slider 6 and the first rack 20, the main shaft 28 can be rotated by the one-way gear ring 21. After the main shaft 28 stops rotating, the turntable 23 rotates 180 degrees. During the upward movement of the slider 6 and the first rack 20, the one-way gear ring 21 rotates freely.

[0055] The one-way gear ring 21 includes an outer gear ring, and a one-way bearing is provided inside the outer gear ring. The outer ring of the one-way bearing is fixedly connected to the outer gear ring, and the inner ring of the one-way bearing is sleeved and fixed on the main shaft 28.

[0056] During the downward movement of slider 6, when elastic sheet 31 is blocked by the upper end of turntable 23, elastic sheet 31 and elastic insulating sheet 32 ​​can deform, and elastic sheet 31 sequentially connects to the first contact 33 and the second contact 34. During the upward movement of slider 6, when elastic insulating sheet 32 ​​is blocked by the lower end of turntable 23, elastic insulating sheet 32 ​​and elastic sheet 31 can deform, and elastic insulating sheet 32 ​​sequentially contacts the first contact 33 and the second contact 34. Under the blocking effect of elastic insulating sheet 32, elastic sheet 31 is not electrically connected to the first contact 33 and the second contact 34.

[0057] When hoisting a large-diameter pipe, first connect the device to the hoisting rope of the lifting equipment through the lifting ring 5, and then move the device above the large-diameter pipe using the lifting equipment.

[0058] As the hoisting rope unwinds, the device descends, positioning the large-diameter pipe within the upper arc plate 1. After the outer wall of the large-diameter pipe contacts the inner edge of the upper arc plate 1, the hoisting rope continues to unwind, causing the boom 4 and slider 6 to move downwards under their own weight. This, in turn, causes the slider 6, elastic plate 31, elastic insulating plate 32, and first rack 20 to move downwards as a whole. During the downward movement of elastic plate 31 and elastic insulating plate 32, when elastic plate 31 is blocked by the upper end of the turntable 23, elastic plate 31 and elastic insulating plate 32 will deform. After deformation, the elastic plate 31 and elastic insulating plate 32... Figure 17 As shown.

[0059] During the deformation and downward movement of the elastic sheet 31 and the elastic insulating sheet 32, the elastic sheet 31 first contacts the first contact point 33. The controller causes the first motor 13 to rotate forward. The first motor 13 drives the rotating rod 18 to rotate, the rotating rod 18 drives the first connecting seat 7 to rotate, and the first connecting seat 7 drives the lower plate 2 to rotate. When the upper arc plate 1 and the lower plate 2 are concentric and their inner edges are circular, the upper arc plate 1 and the two lower plates 2 at its lower end clamp the large-diameter pipe. At this time, the arc groove 9 of the lower plate 2 and the arc groove 9 of the upper arc plate 1 are concentric, and the state of the lower plate 2 is as follows. Figure 9 As shown.

[0060] As the boom 4, slider 6, elastic plate 31, elastic insulating plate 32, and first rack 20 continue to move downwards, elastic plate 31 separates from the first contact 33 and then contacts the second contact 34. After elastic plate 31 contacts the second contact 34, the controller causes the second motor 14 to rotate forward. The second motor 14 drives the first rotating shaft 11 to rotate, and the first rotating shaft 11 drives the gear 17 to rotate. Under the meshing action of gear 17 and second rack 16, the locking block 10 slides in the arc groove 9, and the first connecting seat 7, second connecting seat 8, rotating rod 18, and sleeve 19 rotate as a whole. When the rotating rod 18 and sleeve 19 rotate to the position shown in the image, the controller activates the second motor 14. Figure 10In the vertical position shown, the second motor 14 is off. At this time, the lower plate 2 cannot rotate around the axis of the sleeve 19, so that the lower plate 2 maintains the clamping state of the large-diameter pipe.

[0061] After the elastic sheet 31 separates from the turntable 23, the elastic sheet 31 and the elastic insulating sheet 32 ​​reset under their own elastic force.

[0062] As the slider 6, boom 4, elastic sheet 31, elastic insulating sheet 32, and first rack 20 continue to move downwards as a whole, the first rack 20 engages with the outer gear ring of the one-way gear ring 21, causing the one-way gear ring 21 to rotate. The one-way gear ring 21 drives the main shaft 28 and the second pulley 29 to rotate. The second pulley 29 drives the first pulley 27 to rotate via the belt 30. When the first pulley 27 rotates, the worm 26 rotates, driving the worm wheel 24 to rotate. The worm wheel 24 drives the turntable 23 to rotate via the second rotating shaft 25. When the first rack 20 separates from the outer gear ring of the one-way gear ring 21, the turntable 23 rotates 180 degrees. At this time, the second contact point 34 is located above the first contact point 33.

[0063] When the lifting equipment subsequently rewinds the lifting rope, the slider 6, boom 4, elastic plate 31, elastic insulating plate 32, and first rack 20 move upward as a whole. During this process, after the first rack 20 engages with the outer gear ring of the one-way gear ring 21, the outer gear ring of the one-way gear ring 21 rotates freely, and the main shaft 28 does not rotate, that is, the turntable 23 does not rotate. During the upward movement of the slider 6, boom 4, elastic plate 31, elastic insulating plate 32, and first rack 20 as a whole, the second contact point 34 remains above the first contact point 33.

[0064] During the upward movement of the slider 6, boom 4, elastic sheet 31, elastic insulating sheet 32 ​​and first rack 20 as a whole, when the elastic insulating sheet 32 ​​is blocked by the lower end of the turntable 23, the elastic insulating sheet 32 ​​and the elastic sheet 31 can deform. The elastic insulating sheet 32 ​​contacts the first contact 33 and the second contact 34 in sequence. Under the blocking action of the elastic insulating sheet 32, the elastic sheet 31 is not electrically connected to the first contact 33 and the second contact 34, and the first motor 13 and the second motor 14 will not rotate.

[0065] During the upward movement of the slider 6, boom 4, elastic sheet 31, elastic insulating sheet 32, and first rack 20 as a whole, the deformation states of elastic sheet 31 and elastic insulating sheet 32 ​​are as follows: Figure 18 As shown.

[0066] When the slider 6 is blocked by the upper end of the fixed frame 3, the device drives the large-diameter pipe to the installation position.

[0067] After the large-diameter pipe is installed, the lifting equipment unwinds the lifting rope. As the rope unwinds, the boom 4 and slider 6 move downwards under their own weight. During the downward movement of the slider 6, elastic plate 31, elastic insulating plate 32, and first rack 20, the elastic plate 31 and elastic insulating plate 32 deform and first contact the second contact 34. After the elastic plate 31 contacts the second contact 34, the controller causes the second motor 14 to reverse. The second motor 14 drives the first rotating shaft 11 to rotate, and the first rotating shaft 11 drives the gear 17 to rotate, thereby causing the connector to rotate and reset. The state of the connector after rotation and reset is as follows. Figure 9 As shown.

[0068] After the elastic sheet 31 separates from the second contact 34, it will contact the first contact 33. After the elastic sheet 31 contacts the first contact 33, the controller causes the first motor 13 to reverse, which in turn causes the rotating rod 18 to rotate. The rotating rod 18 drives the first connecting seat 7 to rotate, and the first connecting seat 7 drives the lower plate 2 to rotate and reset. After the lower plate 2 rotates and resets, the device loses its clamping of the large-diameter pipe.

[0069] As the slider 6, boom 4, elastic sheet 31, elastic insulating sheet 32, and first rack 20 continue to move downwards as a whole, the first rack 20 engages with the outer gear ring of the one-way gear ring 21, causing the one-way gear ring 21 to rotate. The one-way gear ring 21 drives the main shaft 28 and the second pulley 29 to rotate. The second pulley 29 drives the first pulley 27 to rotate via the belt 30. When the first pulley 27 rotates, the worm 26 rotates, driving the worm wheel 24 to rotate. The worm wheel 24 drives the turntable 23 to rotate via the second rotating shaft 25. When the first rack 20 separates from the outer gear ring of the one-way gear ring 21, the turntable 23 rotates 180 degrees and returns to its original position. At this time, the second contact point 34 is located below the first contact point 33.

[0070] Then the hoisting rope is wound up, and the device is detached from the installed large-diameter pipe.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable hoisting device for installing large-diameter pipes, comprising two upper arc plates (1), characterized in that, The ends of the lower plate (2) are connected to the lower plate (2) by connectors. The connectors are equipped with a first drive and a second drive. After the first drive is started, it can drive the lower plate (2) to rotate. After the second drive is started, the connector as a whole can rotate on the outside of the upper arc plate (1) and the lower plate (2). After the connector as a whole rotates, it can limit the lower plate (2). The upper end of the upper arc plate (1) is detachably fixed with a fixed frame (3). The fixed frame (3) is slidably mounted with a slider (6) in the vertical direction. The two sliders (6) are fixedly connected to the boom (4). The fixed frame (3) is rotatably mounted with a turntable (23). The axial direction of the turntable (23) is perpendicular to the sliding direction of the slider (6). The fixed frame (3) is rotatably connected with a main shaft (28). The main shaft (28) is connected to the turntable (23) through a transmission assembly. The slider (6) is provided with a groove (35) corresponding to the turntable (23). 5) An elastic sheet (31) is fixed inside, and an elastic insulating sheet (32) is fixed at the upper end of the elastic sheet (31). A first contact (33) and a second contact (34) are fixed at one end of the turntable (23). The first contact (33) and the second contact (34) are symmetrically arranged up and down. The elastic sheet (31), the first contact (33), the first driving component, the power supply and the controller are electrically connected. The elastic sheet (31), the second contact (34), the second driving component, the power supply and the controller are electrically connected. A one-way gear ring (21) is installed on the main shaft (28). A first rack (20) is fixed on the slider (6). When the slider (6) and the first rack (20) move downward, the main shaft (28) can be rotated through the one-way gear ring (21). After the main shaft (28) stops rotating, the turntable (23) rotates 180 degrees. When the slider (6) and the first rack (20) move upward, the one-way gear ring (21) rotates freely.

2. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, The upper arc plate (1) has an opening facing downwards. The two upper arc plates (1) are arranged symmetrically on the left and right. The lower plate (2) is an arc plate located below the end of the upper arc plate (1). After the connector rotates as a whole and limits the lower plate (2), the lower plate (2) and the upper arc plate (1) are concentric, and the inner edges of the upper arc plate (1) and the lower plate (2) are circular.

3. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, The connector includes a first connecting seat (7) and a second connecting seat (8). A rotating rod (18) is fixed to the upper end of the first connecting seat (7). A sleeve (19) is rotatably sleeved on the outside of the rotating rod (18). The sleeve (19) is fixedly connected to the lower end of the second connecting seat (8). A first driving member is fixed inside the lower end of the second connecting seat (8). The first driving member can drive the rotating rod (18) and the first connecting seat (7) to rotate. An arc-shaped groove (9) is opened at the end of the upper arc plate (1) and the outer edge of the lower plate (2). An arc-shaped groove (9) is slidably engaged in the arc-shaped groove (9). The card block (10) is fixedly connected to the upper end of the second connecting seat (8) in the arc groove (9) of the upper arc plate (1), and fixedly connected to the lower end of the first connecting seat (7) in the arc groove (9) of the lower plate (2). The card block (10) is installed with a second driving component, which can drive the card block (10) to slide in the arc groove (9). When the upper arc plate (1) and the lower plate (2) are concentric and their inner edges are circular, the arc groove (9) of the lower plate (2) and the arc groove (9) of the upper arc plate (1) are concentric.

4. The adjustable hoisting device for installing large-diameter pipes according to claim 3, characterized in that, The first driving component includes a first motor (13), which is fixed inside the lower end of the second connecting seat (8). The output shaft of the first motor (13) is concentrically fixedly connected to the rotating rod (18). The second driving component includes a clearance hole (15) opened on the locking block (10). A gear (17) is rotatably arranged in the clearance hole (15). An arc-shaped mounting groove (12) is opened in the groove wall of the arc-shaped groove (9). An arc-shaped second rack (16) is fixed in the mounting groove (12). The gear (17) meshes with the second rack (16), the second motor (14) is fixed inside the clamp (10), the first rotating shaft (11) is concentrically fixed on the output shaft of the second motor (14), and the first rotating shaft (11) is concentrically fixedly connected to the gear (17); the elastic sheet (31), the first contact (33), the first motor (13), the power supply and the controller are electrically connected, and the elastic sheet (31), the second contact (34), the second motor (14), the power supply and the controller are electrically connected.

5. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, Two lifting rings (5) are fixed at the upper end of the boom (4).

6. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, The fixed frame (3) has a vertical groove (22) inside, the slider (6) is slidably engaged in the vertical groove (22), one end of the turntable (23) extends into the vertical groove (22), and the first contact point (33) and the second contact point (34) are fixed on one end of the turntable (23) inside the vertical groove (22).

7. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, The transmission assembly includes a second pulley (29) that is concentrically fixed to the main shaft (28). A worm gear (26) is rotatably disposed in the fixed frame (3) above the main shaft (28). A first pulley (27) is fixed on the worm gear (26). The first pulley (27) and the second pulley (29) are connected by a belt (30). A second rotating shaft (25) is concentrically fixed on the turntable (23). A worm wheel (24) is concentrically fixed on the second rotating shaft (25). The worm wheel (24) meshes with the worm gear (26).

8. The adjustable hoisting device for installing large-diameter pipes according to claim 1, characterized in that, The one-way gear ring (21) includes an outer gear ring, and a one-way bearing is provided inside the outer gear ring. The outer ring of the one-way bearing is fixedly connected to the outer gear ring, and the inner ring of the one-way bearing is sleeved and fixed on the main shaft (28).

9. The adjustable hoisting device for installing large-diameter pipes according to claim 2, characterized in that, The inner edge of the lower plate (2) is provided with an anti-slip layer.

10. The adjustable hoisting device for installing large-diameter pipes according to claim 5, characterized in that, The two lifting rings (5) are symmetrically arranged.

Images