Pipeline lifting device of crane
By designing limiting and rotation drive mechanisms for the upper and lower devices, the problem of controlling the direction of the pipeline lifting device while preventing wire rope entanglement was solved, achieving precise steering and anti-swaying during pipeline lifting, thus improving work efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-04-03
AI Technical Summary
Existing pipe lifting devices are difficult to control pipe rotation while preventing wire rope entanglement, resulting in high workload, low efficiency, and safety hazards.
A pipe lifting device comprising an upper and a lower unit was designed. The device achieves precise pipe turning and anti-swaying through a limiting device and a rotary drive mechanism, and controls the lifting and lowering of the lower unit using a wire rope hook system.
It enables precise steering and anti-swaying during pipeline lifting, reduces manual labor intensity, improves work efficiency, and ensures operational safety.
Smart Images
Figure CN224076959U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipeline lifting technology, specifically to a pipeline lifting device for a crane. Background Technology
[0002] With economic development and improved social standards, the use of pipelines is gradually increasing, with widespread applications in the oil and gas, chemical, heating, and power industries. During pipeline lifting and unloading, issues related to pipeline raising, lowering, and turning are involved to adjust the pipeline's position and direction. While pipeline raising and lowering are typically achieved using cranes, turning is mainly done manually. Operators use hand tools to pull one end of the pipeline to assist in turning, requiring extensive experience and a high degree of concentration. The entire process has low automation, high workload, and low efficiency. Currently, pipeline lifting devices struggle to control pipeline turning while preventing wire rope entanglement. Problems arising from uncontrollable turning when lifting heavy objects are increasingly common, especially when lifting large loads, posing significant safety hazards that not only cause property damage but can also result in personal injury or death. Utility Model Content
[0003] This application provides a pipe lifting device for a crane, which can solve the technical problem that current pipe lifting devices are difficult to control the direction of the pipe while preventing the wire rope from getting tangled, resulting in high work intensity, low work efficiency, and significant safety hazards.
[0004] This application provides a pipe crane hoisting device, including an upper device, a wire rope, a hook system, and a lower device;
[0005] The upper device includes a fixed frame, a first limiting device, a rotary drive mechanism, a rotary connecting shaft, and a second limiting device. The first limiting device is connected to the middle of the bottom surface of the fixed frame, the rotary drive mechanism is connected to the lower part of the fixed frame, and the rotary connecting shaft is rotatably disposed in the middle of the rotary drive mechanism. The first limiting device and the second limiting device are correspondingly arranged, and the middle parts of the first limiting device and the second limiting device are hollow and connected to form a vertical channel.
[0006] The lower device includes a rotating column, a limiting rod, a support frame, a limiting block, and a balance beam. The limiting rod is located on the top outer side of the rotating column. The support frame is rotatably connected to the bottom of the rotating column. The limiting block is located on the outer side of the support frame. The balance beam is connected to the support frame. The distance between the limiting rod and the limiting block is equal to the distance between the first limiting device and the second limiting device.
[0007] The wire rope passes through the vertical channel and connects to the hook system, which is connected to the top of the rotating column. The length of the wire rope is controlled by extension and retraction to control the lifting and lowering of the lower device via the hook system.
[0008] When the limiting bar is engaged with the limiting device, the rotating column and the fixed frame are fixed to each other, the limiting block and the limiting device are engaged, and the rotating drive mechanism drives the rotating connecting shaft to rotate, thereby causing the balance beam to rotate.
[0009] In some embodiments, the bottom surface of the first limiting device is provided with a plurality of first grooves, the opening of the first grooves being funnel-shaped, and the width of the limiting rod being equal to the minimum width of the first groove. The bottom surface of the second limiting device is provided with a plurality of second grooves, the opening of the second grooves being funnel-shaped, and the width of the limiting block being equal to the minimum width of the second groove.
[0010] In some embodiments, each of the first grooves is provided with a pressure sensor and a position sensor to detect the distance between the limiting rod and the top of the first groove of the limiting device one and the pressure applied by the limiting rod to the limiting device one; each of the second grooves is provided with a pressure sensor and a position sensor to detect the distance between the limiting block and the top of the second groove of the limiting device two and the pressure applied by the limiting block to the limiting device two.
[0011] In some embodiments, the rotary drive mechanism includes a cross support frame, a motor, a key one, a pinion, a large gear, a key two, a sleeve, and a gear cover;
[0012] The cross support frame is connected to the bottom of the fixed frame. The gear cover is fixedly connected to the bottom surface of the cross support frame. The first flat key, the small gear, the large gear, the second flat key, and the sleeve are disposed between the cross support frame and the top cover. The motor is fixed to the top surface of the cross support frame, and the drive shaft of the motor extends to the bottom surface of the cross support frame. The motor is fixedly connected to the small gear through the first flat key to transmit power to the small gear. The small gear is connected to the large gear through meshing to transmit power to the large gear. The outer surface of the rotating connecting shaft is connected to the sleeve. The large gear is engaged in the sleeve and fixedly connected to the rotating connecting shaft through the second flat key.
[0013] In some embodiments, the upper device further includes a rotating sealing structure and a top cover, the top cover being fixedly connected to the top surface of the cross support frame, the rotating sealing structure being disposed between the cross support frame and the gear cover, and the rotating connecting shaft being connected to the rotating sealing structure.
[0014] In some embodiments, the rotating sealing structure includes, from bottom to top, a first bearing, a second bearing, a first washer, a round nut, a second washer, and a cover plate; the rotating connecting shaft is connected to the first bearing, which is a deep groove ball bearing; the rotating connecting shaft rotates together with the inner ring of the first bearing, and the outer ring of the first bearing is connected to the cross support frame; the rotating connecting shaft is connected to the second bearing, which is a thrust bearing; the rotating connecting shaft rotates together with the upper support ring of the second bearing, and the lower support ring of the second bearing is connected to the cross support frame; the rotating connecting shaft is connected to the first washer; the rotating connecting shaft is fixedly connected to the round nut; and the rotating connecting shaft is fixedly connected to the cover plate by fasteners.
[0015] In some embodiments, the top of the rotating column is provided with a lifting ring, which is suspended on the hook of the hook system. The bottom of the rotating column is provided with a circular base and a bearing. The support frame is sleeved on the rotating column and rotatably connected to the circular base through the bearing. The bottom surface of the support frame is fixedly connected to the balance beam by fasteners.
[0016] In some embodiments, the pipe lifting device further includes a gantry crane main frame and a control system, the fixing frame being fixed to the gantry crane main frame, and the control system being connected to the wire rope and the rotary drive mechanism.
[0017] In some embodiments, the main frame of the gantry crane includes a trolley device and a trolley device. The trolley device is movably connected to the ground, and the trolley device is connected to the trolley device. The trolley device can move on the trolley device via wheels. The wire rope is connected to the trolley device, and the trolley device controls the raising and lowering of the wire rope.
[0018] The pipe lifting device for a crane provided in this application embodiment uses a separate upper and lower device. The lower device is lifted by a wire rope connected to a hook system to control its lifting and lowering. The upper device includes a fixed frame, a first limiting device, a rotary drive mechanism, a rotary connecting shaft, and a second limiting device. The lower device includes a rotating column, a limiting bar, a support frame, a limiting block, and a balance beam. When the limiting bar engages with the first limiting device, the rotating column is fixed to the fixed frame, and the limiting block engages with the second limiting device. The rotary drive mechanism drives the rotary connecting shaft to rotate, which in turn drives the balance beam to rotate. This prevents the wire rope from getting tangled while controlling the rotation of the support frame. Controlling the rotation of the support frame allows for steering control of the pipe fixed on it, reducing workload, improving efficiency, and ensuring operational safety. Attached Figure Description
[0019] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.
[0020] Figure 1 This is a first-view structural schematic diagram of the pipe lifting device provided in an embodiment of this application.
[0021] Figure 2 This is a second-view structural schematic diagram of the pipe lifting device provided in an embodiment of this application.
[0022] Figure 3 This is a structural schematic diagram of the main frame of the gantry crane provided in an embodiment of this application.
[0023] Figure 4 This is a schematic diagram of the structure of the pipe lifting device provided in the embodiment of this application, after removing the main frame of the gantry crane.
[0024] Figure 5 This is a first-view structural schematic diagram of the upper device provided in an embodiment of this application.
[0025] Figure 6 This is a second-view structural schematic diagram of the upper device provided in an embodiment of this application.
[0026] Figure 7 A cross-sectional view of the upper device provided in an embodiment of this application.
[0027] Figure 8 This is a schematic diagram of the cross support frame provided in an embodiment of this application.
[0028] Figure 9 This is a schematic diagram of the structure of the rotary connecting shaft provided in an embodiment of this application.
[0029] Figure 10This is a schematic diagram of the lower device provided in an embodiment of this application.
[0030] Figure 11 A cross-sectional view of the lower device provided in an embodiment of this application.
[0031] Figure 12 This is a schematic diagram of the combined state structure of the limiting block and the limiting device 2 provided in the embodiments of this application.
[0032] The markings in the diagram are as follows:
[0033] Upper device 1, fixed frame 11, limiting device 12, first groove 121, rotary drive mechanism 13, cross support frame 131, motor 132, flat key 133, small gear 134, large gear 135, flat key 2 136, sleeve 137, gear cover 138, rotary connecting shaft 14, limiting device 2 15, second groove 151, rotary sealing structure 16, bearing 161, bearing 2 162, washer 163, round nut 164, washer 2 165, cover plate 166, top cover 17, wire rope 2, hook system 3, lower device 4, rotating column 41, lifting ring 411, circular ring base 412, bearing 3 413, limiting bar 42, support frame 43, limiting block 44, balance beam 45, gantry crane main frame 5, trolley device 51, trolley device 52. Detailed Implementation
[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0035] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0036] In the description of this application, it should be noted that, unless otherwise expressly 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0038] This application provides a pipe lifting device for a crane, including an upper device 1, a wire rope 2, a hook system 3, and a lower device 4;
[0039] The upper device 1 includes a fixed frame 11, a first limiting device 12, a rotary drive mechanism 13, a rotary connecting shaft 14, and a second limiting device 15. The first limiting device 12 is connected to the middle of the bottom surface of the fixed frame 11, the rotary drive mechanism 13 is connected to the lower part of the fixed frame 11, the rotary connecting shaft 14 is rotatably disposed in the middle of the rotary drive mechanism 13, the first limiting device 12 and the second limiting device 15 are correspondingly arranged, and the middle parts of the first limiting device 12 and the second limiting device 15 are hollowly connected to form a vertical channel.
[0040] The lower device 4 includes a rotating column 41, a limiting rod 42, a support frame 43, a limiting block 44, and a balance beam 45. The limiting rod 42 is located on the top outer side of the rotating column 41. The support frame 43 is rotatably connected to the bottom of the rotating column 41. The limiting block 44 is located on the outer side of the support frame 43. The balance beam 45 is connected to the support frame 43. The distance between the limiting rod 42 and the limiting block 44 is equal to the distance between the first limiting device 12 and the second limiting device 15.
[0041] The wire rope 2 passes through the vertical channel and is connected to the hook system 3. The hook system 3 is connected to the top of the rotating column 41. The length of the wire rope 2 is controlled by telescoping so as to control the lifting and lowering of the lower device 4 through the hook system 3.
[0042] When the limiting rod 42 is engaged with the limiting device 12, the rotating column 41 is fixed to the fixed frame 11, the limiting block 44 is engaged with the limiting device 15, and the rotating drive mechanism 13 drives the rotating connecting shaft 14 to rotate, thereby causing the balance beam 45 to rotate.
[0043] Understandably, a pipe is installed on the balance beam 45 to enable the lifting and removal of the pipe. The vertical channel can restrict the position of the wire rope 2. In this embodiment, through the connection of various components and the coordinated work of various systems, the precise steering and anti-swaying effects during the pipe lifting process can be well achieved, saving labor, improving work efficiency, improving the safety of production operations, ensuring the safety of employees and the safety of company property, saving expenses and increasing profits for the company.
[0044] In some embodiments, the bottom surface of the limiting device 12 is provided with a plurality of first grooves 121, the opening of the first groove 121 is funnel-shaped, the width of the limiting rod 42 is equal to the minimum width of the first groove 121, the bottom surface of the limiting device 15 is provided with a plurality of second grooves 151, the opening of the second groove 151 is funnel-shaped, and the width of the limiting block 44 is equal to the minimum width of the second groove 151.
[0045] In some embodiments, each of the first grooves 121 is provided with a pressure sensor and a position sensor to detect the distance between the limiting rod 42 and the top of the first groove 121 of the limiting device 12 and the pressure applied by the limiting rod 42 to the limiting device 12; each of the second grooves 151 is provided with a pressure sensor and a position sensor to detect the distance between the limiting block 44 and the top of the second groove 151 of the limiting device 2 and the pressure applied by the limiting block 44 to the limiting device 2.
[0046] In some embodiments, the rotary drive mechanism 13 includes a cross support frame 131, a motor 132, a first parallel key 133, a small gear 134, a large gear 135, a second parallel key 136, a sleeve 137, and a gear cover 138.
[0047] The cross support frame 131 is connected to the lower part of the fixed frame 11. The gear cover 138 is fixedly connected to the bottom surface of the cross support frame 131. The first flat key 133, the small gear 134, the large gear 135, the second flat key 136, and the sleeve 137 are disposed between the cross support frame 131 and the gear cover 138. The motor 132 is fixed to the top surface of the cross support frame 131, and the drive shaft of the motor 132 extends to the bottom surface of the cross support frame 131. The motor 132 is fixedly connected to the small gear 134 through the first flat key 133 to transmit power to the small gear 134. The small gear 134 is connected to the large gear 135 through meshing to transmit power to the large gear 135. The outer surface of the rotating connecting shaft 14 is connected to the sleeve 137. The large gear 135 is engaged in the sleeve 137 and fixedly connected to the rotating connecting shaft 14 through the second flat key 136.
[0048] In use, the pipe lifting device of the crane with self-rotation and anti-sway functions drives the small gear 134 to rotate via motor 132. The small gear 134 drives the large gear 135 to rotate, and the large gear 135 drives the rotating connecting shaft 14 to rotate. The rotating connecting shaft 14 drives the limiting device 15 to rotate together. The limiting device 15 is connected to the limiting block 44, which drives the support frame 43 and the balance beam 45 to rotate together. The pipe is suspended at both ends of the balance beam 45, thus rotating with the balance beam 45 and the support frame. The rotating connecting shaft 14 is fixed inside the cross support frame 131 by bearings and other components, and can rotate relative to the cross support frame 131. To prevent the wire rope 2 from rotating and tangling during the rotation of the pipe, a fixed frame 11 is provided at the top. The fixed frame 11 is fixedly connected to the trolley device 52 of the gantry crane. A limiting device 12 is provided at the center of the fixed frame 11. The limiting bar 42 of the lower device 4 is connected to the first groove 121 in the limiting device 12, ensuring that the wire rope 2 does not rotate and tangle during the rotation of the balance beam 45.
[0049] In some embodiments, the upper device 1 further includes a rotating sealing structure 16 and a top cover 17, the top cover 17 being fixedly connected to the top surface of the cross support frame 131, the rotating sealing structure 16 being disposed between the cross support frame 131 and the top cover 17, and the rotating connecting shaft 14 being connected to the rotating sealing structure 16.
[0050] Preferably, the top cover 17 is fixedly connected to the cross support frame 131 by fasteners; the gear cover 138 is fixedly connected to the cross support frame 131 by fasteners to prevent dust and other foreign objects from entering and affecting the rotation of the large gear 135 and the small gear 134.
[0051] In some embodiments, the rotating sealing structure 16 includes, from bottom to top, a first bearing 161, a second bearing 162, a first washer 163, a round nut 164, a second washer 165, and a cover plate 166; the rotating connecting shaft 14 is connected to the first bearing 161, which is a deep groove ball bearing; the rotating connecting shaft 14 rotates together with the inner ring of the first bearing 161, and the outer ring of the first bearing 161 is connected to the cross support frame 131; the rotating connecting shaft 14 is connected to the second bearing 162, which is a thrust bearing; the rotating connecting shaft 14 rotates together with the upper support ring of the second bearing 162, and the lower support ring of the second bearing 162 is connected to the cross support frame 131; the rotating connecting shaft 14 is connected to the first washer 163; the rotating connecting shaft 14 is fixedly connected to the round nut 164; and the rotating connecting shaft 14 is fixedly connected to the cover plate 166 by fasteners.
[0052] In some embodiments, the top of the rotating column 41 is provided with a lifting ring 411, which is suspended on the hook of the hook system 3. The bottom of the rotating column 41 is provided with a circular base 412 and a bearing 413. The support frame 43 is sleeved on the rotating column 41 and rotatably connected to the circular base 412 through the bearing 413. The bottom surface of the support frame 43 is fixedly connected to the balance beam 45 by fasteners.
[0053] The lifting ring 411 and the rotating column 41 are fixedly connected by welding. The lifting ring 411 is suspended from the hook of the hook system 3, supporting the entire lower device 4. The limiting rod 42 is fixedly connected to the rotating column 41 by welding, and is used to engage with the first groove 121 in the limiting device 12 to ensure that the lifting ring 411, the hook system 3, and the wire rope 2 do not rotate during the rotation of the balance beam 45. The rotating column 41 is connected to the support frame 43 through the bearing 413, which enables... The bearing 413 is a thrust cylindrical roller bearing capable of withstanding large axial forces. The support frame 43 is fixedly connected to the balance beam 45 by fasteners to drive the rotation of the balance beam 45. The limiting block 44 is fixedly connected to the support frame 43 by welding and is used to engage with the second groove 151 in the limiting device 15 to transmit the rotation of the limiting device 15 to the support frame 43, thereby driving the balance beam 45 and the pipe hanging below the balance beam 45 to rotate.
[0054] In some embodiments, the pipe lifting device of the crane further includes a gantry crane main frame 5 and a control system. The fixing frame 11 is fixed on the gantry crane main frame 5, and the control system is connected to the wire rope 2 and the rotary drive mechanism 13.
[0055] In some embodiments, the gantry crane main frame 5 includes a trolley device 51 and a trolley device 52. The trolley device 51 is movably connected to the ground, and the trolley device 52 is connected to the trolley device 51. The trolley device 52 can move on the trolley device 51 via wheels. The wire rope 2 is connected to the trolley device 52, and the trolley device 52 controls the raising and lowering of the wire rope 2.
[0056] The control system is used to control the movement of the trolley device 51, the movement of the trolley device 52, the lifting and lowering of the wire rope 2, and the rotation of the motor 132. Under the action of the control system, the automatic rotation of the pipeline can be effectively realized, preventing swaying during pipeline movement. The pipeline lifting device of the crane with self-rotation and anti-sway functions can effectively assist in the steering and anti-swaying of the pipeline during lifting and movement, saving labor, improving work efficiency, improving the safety of production operations, ensuring the safety of employees and the safety of company property, saving expenses and increasing profits for the company.
[0057] The pipe lifting device of the crane provided in this application embodiment is achieved by setting up an upper device 1 and a lower device 4 that are separated from each other. The lower device 4 is lifted by a steel wire rope 2 connected by a hook system 3 to control the lifting and lowering of the lower device 4. The upper device 1 includes a fixed frame 11, a first limiting device 12, a rotary drive mechanism 13, a rotary connecting shaft 14, and a second limiting device 15. The lower device 4 includes a rotating column 41, a limiting bar 42, a support frame 43, a limiting block 44, and a balance beam 45. When the limiting bar 42 is in contact with the lower device 45, the upper device 1 can be lifted by setting up a fixed frame 11, a first limiting device 12, a rotary drive mechanism 13, a rotary connecting shaft 14, and a second limiting device 15. When the limiting device 12 is engaged, the rotating column 41 is fixed to the fixed frame 11, the limiting block 44 is engaged with the limiting device 15, and the rotating drive mechanism 13 drives the rotating connecting shaft 14 to rotate, thereby rotating the balance beam 45. This can prevent the wire rope 2 from getting tangled while controlling the rotation of the support frame 43. Controlling the rotation of the support frame 43 can achieve the turning control of the pipe fixed on the support frame 43, reducing the workload, improving work efficiency, and ensuring work safety.
[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0059] The above provides a detailed description of a pipe lifting device for a crane provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A pipe hoisting device of a crane, characterized in that, The upper device, the steel wire rope, the hook system and the lower device are included. The upper device includes a fixed frame, a limiting device one, a rotary drive mechanism, a rotary connecting shaft and a limiting device two, the limiting device one is connected to the middle part of the bottom surface of the fixed frame, the rotary drive mechanism is connected to the lower part of the fixed frame, the rotary connecting shaft is rotatably arranged in the middle part of the rotary drive mechanism, the limiting device one and the limiting device two are correspondingly arranged, and the middle parts of the limiting device one and the limiting device two are hollowly communicated to form a vertical channel. The lower device includes a rotary column, a limiting rod, a support frame, a limiting block and a balance beam, the limiting rod is arranged on the top outer side of the rotary column, the support frame is rotatably connected to the bottom of the rotary column, the limiting block is arranged on the outer side of the support frame, the balance beam is connected to the support frame, and the distance between the limiting rod and the limiting block is equal to the distance between the limiting device one and the limiting device two. The steel wire rope is connected to the hook system through the vertical channel, the hook system is connected to the top of the rotary column, the length of the steel wire rope is controlled through telescopic control to control the lifting of the lower device through the hook system. When the limiting rod is clamped with the limiting device one, the rotary column and the fixed frame are fixed with each other, the limiting block is clamped with the limiting device two, and the rotary drive mechanism drives the rotary connecting shaft to rotate to drive the balance beam to rotate.
2. Crane pipe hoisting apparatus according to claim 1, characterised in that The bottom surface of the limiting device one is provided with a plurality of first grooves, the opening of the first groove is in a funnel shape, the width of the limiting rod is equal to the minimum width of the first groove, the bottom surface of the limiting device two is provided with a plurality of second grooves, the opening of the second groove is in a funnel shape, and the width of the limiting block is equal to the minimum width of the second groove.
3. Crane pipe hoisting arrangement according to claim 2, characterized in that The first groove is provided with a pressure sensor and a position sensor, which are used for detecting the distance between the limiting rod and the top of the first groove of the limiting device one and the pressure applied by the limiting rod to the limiting device one, the second groove is provided with a pressure sensor and a position sensor, which are used for detecting the distance between the limiting block and the top of the second groove of the limiting device two and the pressure applied by the limiting block to the limiting device two.
4. Crane pipe hoisting apparatus according to claim 1, characterized in that The rotary drive mechanism includes a cross support frame, a motor, a flat key one, a small gear, a large gear, a flat key two, a sleeve and a gear cover. The cross support frame is connected to the lower part of the fixed frame, the gear cover is fixedly connected to the bottom surface of the cross support frame, the flat key one, the pinion, the gear wheel, the flat key two and the sleeve are arranged between the cross support frame and the gear cover, the motor is fixed to the top surface of the cross support frame, the driving shaft of the motor extends to the bottom surface of the cross support frame, the motor is fixedly connected to the pinion through the flat key one to transmit power to the pinion, the pinion is connected to the gear wheel through meshing to transmit power to the gear wheel, the outer surface of the rotary connecting shaft is connected to the sleeve, and the gear wheel is clamped in the sleeve and fixedly connected to the rotary connecting shaft through the flat key two.
5. Crane pipe hoisting arrangement according to claim 4, characterized in that The upper device further comprises a rotary sealing structure and a top cover, the top cover is fixedly connected to the top surface of the cross support frame, the rotary sealing structure is arranged between the cross support frame and the top cover, and the rotary connecting shaft is connected to the rotary sealing structure.
6. Crane pipe hoisting apparatus according to claim 5, characterised in that The rotary sealing structure comprises a bearing one, a bearing two, a washer one, a round nut, a washer two and a cover plate arranged in sequence from bottom to top, the rotary connecting shaft is connected to the bearing one, the bearing one is a deep groove ball bearing, the rotary connecting shaft rotates together with the inner ring of the bearing one, and the outer ring of the bearing one is connected to the cross support frame, the rotary connecting shaft is connected to the bearing two, the bearing two is a thrust bearing, the rotary connecting shaft rotates together with the upper support ring of the bearing two, and the lower support ring of the bearing two is connected to the cross support frame, the rotary connecting shaft is connected to the washer one, the rotary connecting shaft is fixedly connected to the round nut, and the rotary connecting shaft is fixedly connected to the cover plate through a fastener.
7. Crane pipe hoisting apparatus according to claim 1, characterized in that The top part of the rotary column is provided with a lifting ring, the lifting ring is hung on the lifting hook of the lifting hook system, the bottom part of the rotary column is provided with a circular ring base and a bearing three, the support frame is sleeved on the rotary column and rotationally connected to the circular ring base through the bearing three, and the bottom surface of the support frame is fixedly connected to the balance beam through a fastener.
8. Crane pipe hoisting apparatus according to claim 1, characterized in that The pipeline lifting device further comprises a gantry crane main frame and a control system, the fixed frame is fixed to the gantry crane main frame, and the control system is connected to the steel wire rope and the rotary driving mechanism.
9. Crane pipe hoisting arrangement according to claim 8, characterized in that The gantry crane main frame comprises a cart device and a trolley device, the cart device is movably connected to the ground, the trolley device is connected to the cart device, the trolley device can move on the cart device through wheels, the steel wire rope is connected to the trolley device, and the rising and falling of the steel wire rope is controlled through the trolley device. The gantry crane main frame comprises a cart device and a trolley device, the cart device is movably connected to the ground, the trolley device is connected to the cart device, the trolley device can move on the cart device through wheels, the steel wire rope is connected to the trolley device, and the rising and falling of the steel wire rope is controlled through the trolley device.