Hoisting system suitable for LNG cylinder winding process

Abstract

The invention discloses a hoisting system suitable for an LNG gas cylinder winding process, and relates to the technical field of hoisting, the hoisting system comprises a bottom plate, lifting equipment for lifting is symmetrically arranged on the side of the upper surface of the bottom plate, through the arrangement of the lifting equipment, up-and-down lifting work of a top frame can be achieved under electric control, and the lifting efficiency is improved. Meanwhile, the lifting work of the LNG cylinder is realized; the top frame is fixedly arranged at the movable end of the lifting equipment, transverse driving equipment used for generating transverse movement is fixedly arranged on the upper surface of the top frame, the movable end of the transverse driving equipment is connected with a sliding plate in a sliding mode, and by arranging the transverse driving equipment, transverse movement work of the sliding plate can be achieved under electric control; according to the LNG cylinder winding device, the transverse driving equipment is arranged and matched with the lifting equipment and the top frame, LNG cylinders are transferred, by arranging a sliding plate, when the transverse driving equipment works, the sliding plate generates the transverse movement effect in the direction of the top frame, and the LNG cylinders are transferred while being wound.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, specifically to a hoisting system suitable for the LNG cylinder winding process. Background Technology

[0002] Liquefied natural gas (LNG) cylinders are specialized high-pressure, cryogenic, and insulated containers used for storing and transporting cryogenic LNG at -162°C. As a core component of LNG vehicles and supply systems, their performance directly impacts the safety, efficiency, and reliability of the entire system. Modern LNG cylinders typically employ vacuum powder insulation or high-vacuum multilayer winding insulation technology. Their typical structure features a double-liner design: the inner liner is made of cryogenic austenitic stainless steel to directly contain the LNG; the outer liner is made of carbon steel and serves as a protective shield. The space between the inner and outer liners is evacuated to a high vacuum and filled with insulating materials (such as perlite) or wound with multiple layers of anti-radiation film to significantly suppress heat transfer and prevent the intrusion of external heat, thereby maintaining the cryogenic liquid state of the LNG for an extended period.

[0003] In the manufacturing process of LNG cylinders, if the high-performance insulation film is not transferred to the next curing or assembly process in a timely manner after it is wrapped, but remains at the work station for a long time, the insulation film will become loose, which will lead to a series of serious quality problems. It will directly destroy the uniformity and density of the insulation material structure in the vacuum interlayer, and ultimately cause a significant decrease in the overall insulation performance of the cylinder. Therefore, it is necessary to shorten the time between the completion of insulation film wrapping and the next process as much as possible in LNG cylinder manufacturing. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a hoisting system suitable for LNG cylinder winding process, including a base plate, on which lifting devices for lifting are symmetrically arranged on the upper surface of the base plate. By setting the lifting devices, the top frame can be lifted up and down under electronic control, and the LNG cylinder can be lifted up and down at the same time. The top frame is fixed to the movable end of the lifting device. A lateral drive device for generating lateral movement is fixed on the upper surface of the top frame. A sliding plate is slidably connected to the movable end of the lateral drive device. By setting the lateral drive device, the lateral movement of the sliding plate can be realized under electronic control. It can cooperate with the lifting device and the top frame to realize the transfer of LNG cylinders. By setting the sliding plate, when the lateral drive device is working, the sliding plate will move laterally along the direction of the top frame. A positioning ring is provided, with a winding mechanism for winding LNG cylinders fixed on its outer surface. The outer surface of the positioning ring also has a twisting mechanism for flattening the winding film. By setting the positioning ring, it can move together with the lifting equipment and the lateral drive equipment, thereby driving the winding and twisting mechanisms to move. This achieves automatic clamping, rotation, and winding of the LNG cylinders during transport, significantly reducing the total time for LNG cylinder transport and winding. The winding mechanism utilizes the gravity of the LNG cylinder after lifting during transport to clamp it, and winds the required film onto the outer surface of the LNG cylinder as it rotates. The twisting mechanism applies a rotational force to the LNG cylinder after it is positioned, causing it to rotate. This rotation, combined with the winding mechanism, winds the LNG cylinder, and after winding, squeezes both ends of the cylinder, achieving a tight winding effect during rotation. A fixed frame is welded to the lower surface of the sliding plate, and cables are fixedly connected to the corners of the lower surface of the fixed frame. A fixed bracket is welded to the outer surface of the positioning ring, and a support rod is welded to the top of the outer surface of the fixed bracket. The end of the cable away from the fixed frame is welded to the end of the support rod. By setting up the fixed frame and the cable, the cable can be taut when the lifting equipment, the lateral drive equipment, and the sliding plate move up and down and laterally, and the support rod, the fixed bracket, and the positioning ring at the bottom of the cable can be brought closer together, thereby clamping the LNG cylinders placed between the opposite faces of the positioning ring.

[0005] Preferably, the support rods are symmetrically welded to the top of the outer surface of the fixing frame, a flow guide frame is welded to the end of the support rod, the end of the cable near the support rod is located in the inner cavity of the flow guide frame, and a support leg is welded to the bottom of the outer surface of the fixing frame.

[0006] Preferably, the winding mechanism includes an arc-shaped plate, with a support plate symmetrically welded to the outer surface of the arc-shaped plate. A limit ring is welded to the lower surface of the support plate, and a sliding column is slidably connected to the inner cavity of the limit ring. The end of the sliding column is fixed to the outer surface of the fixed frame, and a first spring is welded to the end of the sliding column away from the fixed frame. The end of the first spring is welded to the end of another sliding column.

[0007] Preferably, a locking post is welded to the lower surface of the arc-shaped plate, and a rotating cylinder is rotatably connected to the outer surface of the locking post. A heat-insulating film roll is sleeved on the outer surface of the rotating cylinder.

[0008] Preferably, a limiting frame is welded to the side of the support plate away from the arc plate, and a rotating column is rotatably connected to the inner cavity of the limiting frame. A guide frame is welded to the end of the rotating column, and the opening of the guide frame faces the support plate.

[0009] Preferably, the kneading mechanism includes a support frame welded to the outer surface of the positioning ring. A stepper motor is fixedly mounted on the inner wall of the support frame. A rotating rod is mounted on the output end of the stepper motor via a coupling. A rotating frame is welded to the end of the rotating rod. An anti-slip ring is welded to the side of the rotating frame away from the stepper motor. A first rolling bearing is fixedly connected to the outer surface of the anti-slip ring. The outer ring of the first rolling bearing is fixedly connected to the inner wall of the positioning ring.

[0010] Preferably, the kneading mechanism further includes a flattening mechanism, and the number of the flattening mechanisms is three. The three flattening mechanisms are symmetrical about the axis of the positioning ring. The flattening mechanism includes a limiting frame, which is riveted to the outer surface of the positioning ring. The outer side of the limiting frame is symmetrically provided with track grooves, and a sliding frame is slidably connected to the track grooves on the outer side of the limiting frame.

[0011] Preferably, a connecting frame is welded to the end of the sliding frame, a moving rod is welded to the lower surface of the sliding frame, the moving rod passes through the bottom of the inner wall of the limiting frame, a second spring is sleeved on the outer surface of the moving rod, the top end of the second spring is welded to the lower surface of the sliding frame, and the bottom end of the second spring is welded to the bottom of the inner wall of the limiting frame.

[0012] Preferably, a hydraulic cylinder is fixedly connected to the bottom of the inner wall of the limiting frame, and a pressing rod is provided at the output end of the hydraulic cylinder. The top end of the pressing rod is welded to the lower surface of the connecting frame. A limiting ring is welded to the inner wall of the connecting frame, and a connecting rod is rotatably connected to the inner cavity of the limiting ring. A second rolling bearing is fixedly connected to the outer surface of one end of the connecting rod located in the inner cavity of the limiting ring. The outer ring of the second rolling bearing is fixedly connected to the inner wall of the limiting ring. A rubber column is fixedly connected to the end of the connecting rod away from the second rolling bearing. The rubber column has an inclination angle of 45° with the horizontal plane.

[0013] This invention provides a lifting system suitable for the LNG cylinder winding process. It has the following advantages: I. This hoisting system, applicable to the LNG cylinder winding process, can achieve lateral movement of the sliding plate under electronic control by setting a lateral drive device. It works in conjunction with the lifting equipment and the top frame to realize the transfer of LNG cylinders. By setting the sliding plate, when the lateral drive device is working, the sliding plate will move laterally along the direction of the top frame.

[0014] Second, the hoisting system applicable to the LNG cylinder winding process can move together with the lifting equipment and the lateral drive equipment through the positioning ring, thereby driving the winding mechanism and the twisting mechanism to move. Thus, during the transfer of LNG cylinders, the system can achieve the effect of automatic clamping, rotation and winding of LNG cylinders, thereby greatly reducing the total time of LNG cylinder transfer and winding work.

[0015] 3. The hoisting system applicable to the LNG cylinder winding process, by setting up a winding mechanism, can use the lifting equipment to lift and lower the LNG cylinder and use the gravity of the LNG cylinder itself to clamp the LNG cylinder during the transfer, and can wrap the film to be wrapped onto the outer surface of the LNG cylinder when the LNG cylinder is rotating.

[0016] IV. The hoisting system applicable to the LNG cylinder winding process, by setting a twisting mechanism, can apply a rotational force to the LNG cylinder after it is positioned, thereby causing the LNG cylinder to rotate. Then, in conjunction with the winding mechanism, the winding work of the LNG cylinder is realized. At the same time, after the LNG cylinder is wound, the two ends of the LNG cylinder are squeezed, and during the rotation of the LNG cylinder, the effect of tight winding of the LNG cylinder is achieved.

[0017] V. This hoisting system, applicable to the LNG cylinder winding process, utilizes the concave arc structure of the anti-slip ring (compatible with the outer diameter of the LNG cylinder) and the properties of the rubber material. When the positioning rings are relatively close, it can apply an upward lifting force to the side / upper middle part of the cylinder in a surface contact manner. The lifting force of the anti-slip ring causes the cylinder to detach from the arc plate, forming a stable gap of 10-15mm between them. The lifting force of the anti-slip ring and the lateral clamping force of the positioning ring work together, eliminating the need for an additional independent lifting device and realizing an integrated operation of "clamping-lifting-rotation". Compared with the traditional process of "clamping first and then manually adjusting the lifting height", it can reduce the process time by 30%. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a hoisting system for LNG cylinder winding process according to the present invention; Figure 2 This is a structural side view of a hoisting system for LNG cylinder winding process according to the present invention; Figure 3 This is a partial structural schematic diagram of a hoisting system applicable to the LNG cylinder winding process of the present invention; Figure 4 This is a schematic diagram of the winding mechanism structure of the present invention; Figure 5 This is a schematic cross-sectional view of the winding mechanism of the present invention; Figure 6This is a partial structural diagram of the winding mechanism of the present invention; Figure 7 This is a schematic diagram of the kneading mechanism of the present invention; Figure 8 This is a schematic cross-sectional view of the kneading mechanism of the present invention; Figure 9 This is a schematic diagram of the flattening mechanism of the present invention; Figure 10 This is a schematic cross-sectional view of the flattening mechanism of the present invention.

[0019] In the diagram: 1. Base plate; 2. Lifting device; 3. Top frame; 4. Lateral drive device; 5. Sliding plate; 6. Winding mechanism; 61. Sliding column; 62. Limiting ring; 63. First spring; 64. Support plate; 65. Arc plate; 66. Positioning column; 67. Rotating cylinder; 68. Heat insulation film roll; 69. Limiting frame; 610. Rotating column; 611. Guide frame; 7. Kneading mechanism; 71. Support frame; 72. Stepper motor; 73. Rotating rod; 74. Rotating frame; 75. Anti-slip ring; 76. First rolling bearing; 77. Flattening mechanism; 771. Limiting frame; 772. Sliding frame; 773. Connecting frame; 774. Hydraulic cylinder; 775. Extrusion rod; 776. Moving rod; 777. Second spring; 778. Limiting ring; 779. Second rolling bearing; 7710. Connecting rod; 7711. Rubber column; 8. Fixing frame; 9. Cable; 10. Positioning ring; 11. Fixing bracket; 12. Support leg; 13. Support rod; 14. Guide frame. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0021] like Figures 1-10 As shown, the present invention provides a technical solution: a hoisting system suitable for LNG cylinder winding process, including a base plate 1, on which lifting devices 2 for lifting are symmetrically arranged on the sides of the upper surface of the base plate 1. By setting the lifting devices 2, the top frame 3 can be lifted up and down under electronic control, and the LNG cylinder can be lifted up and down at the same time. The top frame 3 is fixed to the movable end of the lifting device 2. The upper surface of the top frame 3 is fixed with a lateral drive device 4 for generating lateral movement. The movable end of the lateral drive device 4 is slidably connected to a sliding plate 5. By setting the lateral drive device 4, the lateral movement of the sliding plate 5 can be realized under electronic control. It can cooperate with the lifting device 2 and the top frame 3 to realize the transfer of LNG cylinders. By setting the sliding plate 5, when the lateral drive device 4 is working, the sliding plate 5 will generate the effect of lateral movement along the direction of the top frame 3. A positioning ring 10 is provided, and a winding mechanism 6 for winding LNG cylinders is fixed on its outer surface. The winding mechanism 6 is fixed to the bottom of the positioning ring 10, and a twisting mechanism 7 for flattening the winding film is provided on the outer surface of the positioning ring 10. By setting the positioning ring 10, it can move together with the lifting device 2 and the lateral drive device 4, thereby driving the winding mechanism 6 and the twisting mechanism 7 to move. This achieves the effect of automatic clamping, rotation, and winding of LNG cylinders during the transfer process, thus significantly reducing the total time of LNG cylinder transfer and winding work. By setting the winding mechanism 6, the LNG cylinder can be clamped by its own weight after the lifting device 2 has lifted it during the transfer process, and the film to be wound can be wound onto the outer surface of the LNG cylinder while it is rotating. By setting the twisting mechanism 7, a rotational force can be applied to the LNG cylinder after it is positioned, thereby causing the LNG cylinder to rotate. Then, in conjunction with the winding mechanism 6, the winding of the LNG cylinder is achieved. At the same time, after the LNG cylinder is wound, the two ends of the LNG cylinder are squeezed, and the LNG cylinder is tightly wound during the rotation process. A fixed frame 8 is welded to the lower surface of the sliding plate 5. Cables 9 are fixedly connected to the corners of the lower surface of the fixed frame 8. A fixed bracket 11 is welded to the outer surface of the positioning ring 10. A support rod 13 is welded to the top of the outer surface of the fixed bracket 11. The end of the cable 9 away from the fixed frame 8 is welded to the end of the support rod 13. By setting the fixed frame 8 and the cable 9, the cable 9 can be taut when the lifting device 2, the lateral drive device 4 and the sliding plate 5 are raised and lowered and moved laterally. The support rod 13, the fixed bracket 11 and the positioning ring 10 at the bottom of the cable 9 can be brought closer together, so that the LNG cylinders placed between the opposite sides of the positioning ring 10 can be clamped.

[0022] Support rods 13 are symmetrically welded to the top of the outer surface of the fixed frame 11. A guide frame 14 is welded to the end of the support rod 13. The end of the cable 9 near the support rod 13 is located inside the guide frame 14. Support legs 12 are welded to the bottom of the outer surface of the fixed frame 11. By setting the guide frame 14, the bottom end of the cable 9 can be wrapped, and when the cable 9 is taut, it will be vertical at the bottom and tilted in the upper middle part, thus allowing the positioning rings 10 on both sides to be relatively close when the cable 9 is taut. By setting the support legs 12, the support legs 12 can be close to the ground when the lifting device 2 does not move the top frame 3 upwards, thereby supporting the fixed frame 11 and the positioning rings 10, thus providing support for the device.

[0023] The winding mechanism 6 includes an arc-shaped plate 65. A support plate 64 is symmetrically welded to the outer surface of the arc-shaped plate 65. A limit ring 62 is welded to the lower surface of the support plate 64. A sliding column 61 is slidably connected to the inner cavity of the limit ring 62. The end of the sliding column 61 is fixed to the outer surface of the fixing frame 11. A first spring 63 is welded to the end of the sliding column 61 away from the fixing frame 11. The end of the first spring 63 is welded to the end of another sliding column 61. By setting the arc-shaped plate 65 and the support plate 64, the bottom of the LNG cylinder can be wrapped. After the LNG cylinder is clamped, there is still a certain distance between the LNG cylinder and the upper arc surface of the arc-shaped plate 65 and the support plate 64. This allows the material to pass through the bottom of the LNG cylinder during rotation and winding. The radius of curvature of its inner arc surface is consistent with the outer diameter of the LNG cylinder (e.g., for a cylinder with an outer diameter of 400mm, the radius of curvature of the inner side of the arc-shaped plate 65 is set to 200±1mm), ensuring a close fit to the bottom of the cylinder. (See attached image) Figure 5 The arc-shaped plate 65 is adapted to the bottom of the gas cylinder; the width (left-right direction) of the arc-shaped plate 65 is 300-350mm, and the arc length covers 1 / 3 of the circumference of the bottom of the gas cylinder, ensuring both load-bearing stability and reserving space for the heat insulation film to pass through. Two arc-shaped support plates 64 are symmetrically welded to the outer surface of the arc-shaped plate 65 (the two support plates 64 are symmetrical about the vertical central axis of the arc-shaped plate 65, and are attached with...). Figure 5The arc-shaped plate 65 is designed to meet the requirements of front-to-back force balance. The inner arc surface of the support plate 64 is fully fitted with the outer surface of the arc-shaped plate 65, with a welding area ≥ 2 / 3 of the area of ​​the support plate 64 and a width of 80-100mm, to stabilize and support the arc-shaped plate 65 and the gas cylinder above it. By setting the sliding column 61 and the limiting ring 62, the sliding column 61 can move laterally within the inner cavity of the limiting ring 62. Thus, when the cable 9 is taut, the sliding column 61 and the positioning ring 10 are brought closer together. Each arc-shaped support plate 64 has a circular limiting ring 62 welded vertically at each of its left and right ends on its lower surface (a total of 4 limiting rings 62, with an inner diameter 0.5-1mm larger than the outer diameter of the sliding column 61; for example, if the diameter of the sliding column is 20mm, the inner diameter of the limiting ring 62 is set to 20.5-21mm). The inner wall of the limiting ring 62 is polished smooth (roughness Ra≤1.6um) to meet the requirement of the arc-shaped plate 65 moving laterally with the positioning ring 10 as shown in the attached figure. Each of the four limiting rings 62 has a cylindrical sliding post 61 slidably connected to its inner cavity (the sliding post 61 is made of 304 stainless steel, with a diameter of 20mm, and its length is designed according to the initial spacing of the positioning rings 10); the left ends of the two left sliding posts 61 are fixed to the middle of the inner wall of the left fixed frame 11, and the right ends of the two right sliding posts 61 are fixed to the middle of the inner wall of the right fixed frame 11 (the fixed height of the sliding posts 61 is consistent with the center height of the limiting rings 62, with an error of <2mm, to ensure that the arc plate 65 is horizontally stable when moving laterally, and is in harmony with the attached...). Figure 5 (The smooth movement logic of the arc-shaped plate 65 is consistent). By setting the first spring 63, the sliding column 61 can be limited, so that when the sliding column 61 and the positioning ring 10 are not under tension or compression, the two sliding columns 61 maintain a certain distance. At the same time, the distance between the two positioning rings 10 is greater than the length of the LNG cylinder. The lower surface of the arc-shaped plate 65 is welded with a locking post 66. The outer surface of the locking post 66 is rotatably connected to a rotating cylinder 67. The outer surface of the rotating cylinder 67 is fitted with a heat insulation film roll 68. By setting the locking post 66, the rotating cylinder 67 can be limited, so that when the rotating cylinder 67 is installed on the outer surface of the locking post 66, it is in the correct position. At the same time, the rotating cylinder 67 drives the heat insulation film roll 68 to rotate, which facilitates the rotation of the heat insulation film roll 68. In the feeding operation, a limiting frame 69 is welded to the side of the support plate 64 away from the arc plate 65. A rotating column 610 is rotatably connected to the inner cavity of the limiting frame 69. A guide frame 611 is welded to the end of the rotating column 610. The opening of the guide frame 611 faces the support plate 64. By setting the limiting frame 69, the rotating column 610 can be limited, so that the rotating column 610 can rotate stably in the inner cavity of the limiting frame 69. By setting the guide frame 611, the end of the heat insulation film roll 68 can be inserted into its inner cavity and guided as the LNG cylinder rotates. Finally, when the heat insulation film is wrapped around the outer surface of the LNG cylinder, the heat insulation film can be stably attached to the LNG cylinder.

[0024] The kneading mechanism 7 includes a support frame 71, which is welded to the outer surface of the positioning ring 10. A stepper motor 72 is fixed to the inner wall of the support frame 71. A rotating rod 73 is mounted on the output end of the stepper motor 72 via a coupling. A rotating frame 74 is welded to the end of the rotating rod 73. An anti-slip ring 75 is welded to the side of the rotating frame 74 away from the stepper motor 72. A first rolling bearing 76 is fixedly connected to the outer surface of the anti-slip ring 75. The outer ring of the first rolling bearing 76 is fixedly connected to the inner wall of the positioning ring 10. A U-shaped support frame 71 is welded to the top of the outer circular surface of each positioning ring 10 (directly above the axis of the positioning ring 10). A circular motor mounting seat with a diameter of 60 mm and a depth of 15 mm is machined in the middle of the inner wall of the support frame 71. Four M8 threaded holes (50 mm apart from the circumference diameter) are opened in the seat for fixing the stepper motor 72. By setting the stepper motor 72, the rotating rod 73 at its output end can be controlled to drive the rotating frame 74 to rotate, ultimately causing the anti-slip ring 75 to rotate. By setting the first rolling bearing 76, the anti-slip ring 75 can rotate more stably. The anti-slip ring 75, made of rubber, protects the LNG cylinder from damage when in contact with it, while increasing the friction between them. This allows the LNG cylinder to rotate together with the anti-slip ring 75 and the rotating frame 74. A concave annular anti-slip ring 75 (made of nitrile rubber with a Shore hardness of 65HA, the radius of curvature of the inner concave surface is consistent with the outer diameter of the LNG cylinder; for example, if the outer diameter is 400mm, the radius of curvature is set to 200 + 0.5mm; the axial width of the anti-slip ring 75 is 60mm, covering 3 / 4 of the axial width of the rotating frame 74, ensuring surface contact with the side of the cylinder, with a friction coefficient ≥0.4) is machined on the outer surface of the anti-slip ring 75. A 15mm wide and 5mm deep annular mounting groove is machined on the outer surface of the anti-slip ring 75 for assembling the first rolling bearing 76.

[0025] The kneading mechanism 7 also includes a flattening mechanism 77, of which there are three, and the three flattening mechanisms 77 are circularly symmetrical about the axis of the positioning ring 10. The flattening mechanism 77 includes a limiting frame 771, which is riveted to the outer surface of the positioning ring 10. The outer side of the limiting frame 771 is symmetrically provided with track grooves, and a sliding frame 772 is slidably connected to the track grooves on the outer side of the limiting frame 771. By evenly distributing three flattening mechanisms 77 on the outer surface of the positioning ring 10 on one side, the heat insulation film can be flattened when the end of the wound LNG cylinder needs to be squeezed. By setting a limiting frame 771 and symmetrically opening track grooves on its outer surface, the sliding frame 772 can slide smoothly within the inner cavity of the limiting frame 771. A connecting frame 773 is welded to the end of the sliding frame 772, and a moving rod 776 is welded to the lower surface of the sliding frame 772. The moving rod 776 passes through the bottom of the inner wall of the limiting frame 771, and a second spring 777 is sleeved on the outer surface of the moving rod 776. The top end of the second spring 777 is welded to the lower surface of the sliding frame 772, and the bottom end of the second spring 777 is welded to the limiting frame 771. At the bottom of the inner wall, a movable rod 776 and a second spring 777 are provided. This allows the movable rod 776 and the sliding frame 772 to always move upwards within the inner cavity of the limiting frame 771 when the sliding frame 772 is not under pressure. Simultaneously, the movable rod 776 can cooperate with a track groove on the outer side of the limiting frame 771, enabling the sliding frame 772 to move more smoothly. A hydraulic cylinder 774 is fixedly connected to the bottom of the inner wall of the limiting frame 771. A pressing rod 775 is provided at the output end of the hydraulic cylinder 774, and the top of the pressing rod 775... A limiting ring 778 is welded to the lower surface of the connecting frame 773. A connecting rod 7710 is rotatably connected to the inner cavity of the limiting ring 778. A second rolling bearing 779 is fixedly connected to the outer surface of one end of the connecting rod 7710 located within the inner cavity of the limiting ring 778. The outer ring of the second rolling bearing 779 is fixedly connected to the inner wall of the limiting ring 778. A rubber column 7711 is fixedly connected to the end of the connecting rod 7710 away from the second rolling bearing 779. The angle of inclination of the rubber column 7711 to the horizontal plane is... With an angle of 45°, the hydraulic cylinder 774 allows the extrusion rod 775 at the output end to move the connecting frame 773 under control. By setting a limit ring 778 and a second rolling bearing 779, the connecting rod 7710 can rotate stably within the inner cavity of the limit ring 778 and the connecting frame 773. By setting a rubber column 7711, when in contact with the heat insulation film on the outer surface of the LNG cylinder, the rubber column 7711 can flatten the heat insulation film on the outer surface of the LNG cylinder, ultimately allowing the heat insulation film to be tightly wrapped.

[0026] Working principle: The operator first controls the lifting device 2 (symmetrically arranged on the sides of the base plate 1) to descend to the bottom using the electrical control system, so that the support legs 12 at the bottom of the fixed frame 11 (two are welded on each side of the fixed frame 11) are in complete contact with the upper surface of the base plate 1. At this time, the support legs 12 provide stable vertical support for the positioning ring 10, the fixed frame 11 and the winding mechanism 6, preventing the system from tipping over. Then, the operator places the LNG cylinder (hollow structure, adapted to the outer diameter of the system) that has undergone the receiving process smoothly on the arc plate 65 and the support plate 64. On the upper surface, it is necessary to ensure that the cylinder axis coincides with the vertical center axis of the arc plate 65, and that the bottom of the cylinder is completely in contact with the concave arc surface of the arc plate 65 to avoid initial placement offset; at this time, due to the initial tension of the first spring 63 (connecting the left and right sliding columns 61), the distance between the two positioning rings 10 is 50-80mm larger than the length of the cylinder, and the anti-slip ring 75 (concave arc shape, with a radius of curvature consistent with the outer diameter of the cylinder) is in a "ready to contact" state with the outer surface of the cylinder; then the operator starts the lifting device 2, so that the top frame 3 moves horizontally As the drive device 4 moves upward, the fixed frame 8 also moves upward. At this time, the cable 9 begins to taut. Under the influence of the device's own weight and the weight of the LNG cylinder, the positioning ring 10 at the bottom of the cable 9 will move closer together. Since the positioning ring 10 and the anti-slip ring 75 have a certain curvature, as the two positioning rings 10 move closer together, the LNG cylinder located above the arc plate 65 will be lifted up, eventually aligning the axis of the LNG cylinder with the axis of the positioning ring 10, while maintaining a certain distance between the LNG cylinder and the arc plate 65. During the process, the LNG cylinder is clamped. Since the LNG cylinder is hollow, the lateral tension generated by the device's own weight is sufficient to clamp the LNG cylinder. The operator passes the end of the heat insulation film roll 68 (fitted onto the outer surface of the rotating cylinder 67) through the guide frame 611 (opening towards the support plate 64, center height aligned with the cylinder axis) and manually fixes the film end to the outer surface of the cylinder. Subsequently, the PLC controller starts the two stepper motors 72 on the left and right sides, and the controller outputs two pulses with an error of <0.1%. The synchronization signal causes two motors to rotate the rotating rod 73, rotating frame 74, and anti-slip ring 75 at a uniform speed of 5-10 r / min. Due to the friction between the anti-slip ring 75 and the gas cylinder, the gas cylinder rotates synchronously with the anti-slip ring 75. The rotating cylinder 67 rotates around the positioning post 66 under the action of the heat insulation film tension to deliver the film. The guide frame 611 guides the heat insulation film to ensure that the film is evenly wrapped around the outer surface of the gas cylinder. 10-15 seconds after the winding starts (after the film is initially fixed), the horizontal drive device 4 is controlled by the electrical control system to drive the sliding plate 5 to move laterally at a slow speed of 0.1-0.2 m / s. Then, the positioning ring 10 and the gas cylinder are synchronously transferred through the fixed frame 8 and the cable 9. The moving speed matches the rotation speed of the gas cylinder (ensuring that the film is wrapped 3-5 times per meter of transfer distance) to avoid the film from becoming loose due to excessive speed or overlapping due to excessive slowness.After the LNG cylinder is wound, the hydraulic cylinder 774 starts working, which causes the sliding frame 772 to move the limit ring 778 and the rubber column 7711 towards the outer surface of the LNG cylinder. At this time, the stepper motor 72 starts working again and rotates the LNG cylinder, so that the end of the heat insulation film is pressed flat. During the winding process of the LNG cylinder, the lateral drive device 4 moves smoothly, which can realize the transfer of the LNG cylinder at the same time as winding, and prevent the heat insulation film from loosening due to the LNG cylinder being left for too long without proceeding to the next step or due to bumps during the transfer.

[0027] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A lifting system suitable for LNG cylinder winding process, characterized in that, include: The base plate (1) has lifting devices (2) symmetrically arranged on the sides of the upper surface of the base plate (1). The top frame (3) is fixed to the movable end of the lifting device (2). The upper surface of the top frame (3) is fixed with a lateral drive device (4) for generating lateral movement. The movable end of the lateral drive device (4) is slidably connected to a sliding plate (5). Positioning ring (10), the outer surface of which is fixed with a winding mechanism (6) for winding LNG cylinder, and the outer surface of which is provided with a twisting mechanism (7) for flattening the winding film. A fixed frame (8) is welded to the lower surface of the sliding plate (5). Cables (9) are fixedly connected to the corners of the lower surface of the fixed frame (8). A fixed bracket (11) is welded to the outer surface of the positioning ring (10). A support rod (13) is welded to the top of the outer surface of the fixed bracket (11). The end of the cable (9) away from the fixed frame (8) is welded to the end of the support rod (13).

2. The hoisting system for LNG cylinder winding process according to claim 1, characterized in that: The support rod (13) is symmetrically welded to the top of the outer surface of the fixed frame (11). A flow guide frame (14) is welded to the end of the support rod (13). The end of the cable (9) near the support rod (13) is located in the inner cavity of the flow guide frame (14). A support leg (12) is welded to the bottom of the outer surface of the fixed frame (11).

3. The hoisting system for LNG cylinder winding process according to claim 1, characterized in that: The winding mechanism (6) includes an arc plate (65), on the outer surface of which a support plate (64) is symmetrically welded. A limit ring (62) is welded to the lower surface of the support plate (64). A sliding column (61) is slidably connected to the inner cavity of the limit ring (62). The end of the sliding column (61) is fixed to the outer surface of the fixing frame (11). A first spring (63) is welded to the end of the sliding column (61) away from the fixing frame (11). The end of the first spring (63) is welded to the end of another sliding column (61).

4. The hoisting system for LNG cylinder winding process according to claim 3, characterized in that: The lower surface of the arc plate (65) is welded with a positioning post (66), and the outer surface of the positioning post (66) is rotatably connected to a rotating cylinder (67), and the outer surface of the rotating cylinder (67) is covered with a heat insulation film roll (68).

5. A hoisting system suitable for LNG cylinder winding process according to claim 4, characterized in that: A limiting frame (69) is welded to the side of the support plate (64) away from the arc plate (65). A rotating column (610) is rotatably connected to the inner cavity of the limiting frame (69). A guide frame (611) is welded to the end of the rotating column (610), and the opening of the guide frame (611) faces the support plate (64).

6. A hoisting system suitable for LNG cylinder winding process according to claim 1, characterized in that: The kneading mechanism (7) includes a support frame (71), which is welded to the outer surface of the positioning ring (10). A stepper motor (72) is fixedly installed on the inner wall of the support frame (71). A rotating rod (73) is installed at the output end of the stepper motor (72) through a coupling. A rotating frame (74) is welded to the end of the rotating rod (73). An anti-slip ring (75) is welded to the side of the rotating frame (74) away from the stepper motor (72). A first rolling bearing (76) is fixedly connected to the outer surface of the anti-slip ring (75). The outer ring of the first rolling bearing (76) is fixedly connected to the inner wall of the positioning ring (10).

7. A hoisting system suitable for LNG cylinder winding process according to claim 1, characterized in that: The kneading mechanism (7) also includes a flattening mechanism (77), which has three components. The three flattening mechanisms (77) are symmetrical about the axis of the positioning ring (10). The flattening mechanism (77) includes a limiting frame (771), which is riveted to the outer surface of the positioning ring (10). The outer side of the limiting frame (771) is symmetrically provided with track grooves, and a sliding frame (772) is slidably connected to the track grooves on the outer side of the limiting frame (771).

8. A hoisting system suitable for LNG cylinder winding process according to claim 7, characterized in that: A connecting frame (773) is welded to the end of the sliding frame (772). A moving rod (776) is welded to the lower surface of the sliding frame (772). The moving rod (776) passes through the bottom of the inner wall of the limiting frame (771). A second spring (777) is sleeved on the outer surface of the moving rod (776). The top end of the second spring (777) is welded to the lower surface of the sliding frame (772), and the bottom end of the second spring (777) is welded to the bottom of the inner wall of the limiting frame (771).

9. A hoisting system suitable for LNG cylinder winding process according to claim 8, characterized in that: A hydraulic cylinder (774) is fixedly connected to the bottom of the inner wall of the limiting frame (771). A pressing rod (775) is provided at the output end of the hydraulic cylinder (774). The top end of the pressing rod (775) is welded to the lower surface of the connecting frame (773). A limiting ring (778) is welded to the inner wall of the connecting frame (773). A connecting rod (7710) is rotatably connected to the inner cavity of the limiting ring (778). A second rolling bearing (779) is fixedly connected to the outer surface of one end of the connecting rod (7710) located in the inner cavity of the limiting ring (778). The outer ring of the second rolling bearing (779) is fixedly connected to the inner wall of the limiting ring (778). A rubber column (7711) is fixedly connected to the end of the connecting rod (7710) away from the second rolling bearing (779). The inclination angle of the rubber column (7711) with the horizontal plane is 45°.

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