A rotary sail single-point hoisting structure and a hoisting method thereof

Abstract

The application relates to the single-point hoisting technical field and discloses a rotating wind sail single-point hoisting structure and a hoisting method thereof, which comprises a rotating wind sail body, a wharf support bed frame, a ship track, a second lifting lug and a hand-operated hoist, the outer surface of the rotating wind sail body is provided with a first lifting lug, a first unhooking device is arranged at the first lifting lug, a hoisting rope is arranged at the other end of the first unhooking device, the two sides of the wharf support bed frame are provided with wharf tracks and wharf AUD bases, a first guide plate is welded at the end of the wharf AUD base far from the wharf support bed frame, the opposite outer surfaces of the AUD bases on the left and right sides are both welded with second guide plates, and the side of the ship track is provided with a ship AUD base. When hoisting is carried out, the rotating phenomenon of the rotating wind sail body is reduced, the rotating wind sail body can be prevented from being inclined after being hoisted, the safety of equipment and personnel can be ensured, and the hoisting of the rotating wind sail can be accurately and quickly completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of single-point hoisting, in particular to a rotating wind sail single-point hoisting structure and a hoisting method thereof. BACKGROUND

[0002] The rotating wind sail, also known as rotor wind sail or rotating cylinder wind sail, works on the principle of Magnus effect. When wind blows through the rotating wind sail, high pressure is generated on one side of the wind sail, and low pressure is generated on the other side, thereby generating a thrust perpendicular to the airflow direction to push the ship forward. This technology can effectively reduce engine load, improve ship energy efficiency, and reduce fuel consumption and carbon emissions. A rotating wind sail is usually installed on some ships, and the single-point hoisting of the high-value equipment is difficult in the prior art, as follows:

[0003] 1. According to the design scheme of the manufacturer, the rotating wind sail has only one lifting lug for single-point hoisting. Since the equipment is assembled on a precast cradle on the wharf, the lower opening of the equipment is fixed on the track of the cradle, and the equipment is prone to rotate during lifting, which causes interference between the lower opening of the equipment and the track, and further causes lifting difficulty.

[0004] 2. Since the lifting point is inside the equipment, the hoisting belt must pass through the top hatch of the rotating wind sail and be connected with the lifting lug of the equipment. However, since the diameter of the hole is only about 1000mm when designed, and the center of gravity of the equipment is not at the center, the equipment will be inclined in the natural state after being lifted. In theory, the distance between the hoisting belt and the edge of the top hole is only about 175mm, and the eccentricity during lifting can easily cause the equipment to shake, affecting the safety of the equipment and personnel.

[0005] 3. After the rotating wind sail is lifted, it is hoisted to the ship by a large floating crane. However, due to uncontrollable factors such as tide, weather, and waves caused by the navigation of other ships on the Yangtze River, the hoisting belt may come into contact with the edge of the top hatch. The outer cylinder of the equipment is made of glass fiber reinforced plastic, which can easily damage the top of the rotating wind sail, and further maintenance of the glass fiber reinforced plastic is required.

[0006] 4. The equipment needs to be hoisted to the installed base and track on the ship. However, the gap between the lower opening roller of the equipment and the track is only 20mm, and the AUD base bolt holes at the four corners of the equipment need to be aligned with the base bolt holes on the ship. There are a total of 200 bolt holes that need to be aligned, and the precision requirement for hoisting and installing the equipment is very high.

[0007] In summary, the present application provides a rotating wind sail single-point hoisting structure and a hoisting method thereof, which can accurately and quickly complete the hoisting of the rotating wind sail. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a rotating sail single-point hoisting structure and a hoisting method thereof to solve the problems mentioned in the background.

[0009] To achieve the above object, the present application provides the following technical scheme: a rotating sail single-point hoisting structure, comprising a rotating sail body, a wharf support jig, a ship track, a second lifting lug and a hand chain block, the outer surface of the rotating sail body is provided with a first lifting lug, a first unhooking device is arranged at the first lifting lug, the other end of the first unhooking device is provided with a hoisting rope, the hoisting rope is annular in shape, the two ends of the hoisting rope are movably sleeved with connecting seats, the inside of the connecting seat is provided with two connecting plates, the opposite outer surfaces of the two connecting plates are fixedly connected with two side plates, the outer surfaces of the two side plates are rotatably connected with a rotating shaft, the outer surface of the rotating shaft is fixedly sleeved with an abutting wheel, the opposite outer surfaces of the connecting seats at the two ends of the hoisting rope are fixedly connected with an ear plate, the outer surface of the ear plate is provided with a fixing hole, the inside of the fixing hole is threadedly connected with a fixing bolt, and the outer surface of the fixing bolt is threadedly connected with a fixing nut.

[0010] As a further description of the present application, the two sides of the wharf support jig are provided with a wharf track and a wharf AUD base, the first guide plate is welded to the end of the wharf AUD base away from the wharf support jig, and the second guide plate is welded to the opposite outer surfaces of the AUD bases on the left and right sides.

[0011] As a further description of the present application, the ship track is provided with a ship AUD base on one side, and the third guide plate is welded to the opposite outer surfaces of the two ship AUD bases and the outer surface of the ship AUD base away from the ship track.

[0012] As a further description of the present application, the top protection ring is arranged at the top hatch opening of the rotating sail body, and a plurality of positioning screw holes arranged in a circumferential array are formed around the top protection ring.

[0013] As a further description of the present application, the hoisting rope comprises a steel rope and a flexible sling, and the flexible sling is sleeved outside the steel rope.

[0014] As a further description of the present application, the ship AUD base is provided with a positioning pin at each corner.

[0015] As a further description of the present application, the left and right inner surfaces of the connecting seat are fixedly connected with two springs and two telescopic rods, the other ends of the two springs and the two telescopic rods are fixedly connected with the connecting plate, and the spring is sleeved outside the telescopic rod.

[0016] The present application also provides a rotating sail single-point hoisting method, comprising the following steps:

[0017] S1: Install the wharf track and wharf AUD base on the wharf test site, install the ship track and ship AUD base on the ship, and preform the positioning pin matched with the four corners of the wharf AUD base and the ship AUD base.

[0018] S2: Weld the first guide plate, the second guide plate and the third guide plate on the surfaces of the wharf AUD base and the ship AUD base respectively.

[0019] S3: Weld the second lifting lug around the wharf test site and the ship, and connect the second lifting lug and the rotating wind sail body through the chain hoist.

[0020] S4: Install the top protection ring at the top hatch cover of the rotating wind sail body.

[0021] S6: Connect the first shackle with the first lifting lug, screw the fixing bolt into the corresponding fixing hole, connect the corresponding two connecting seats by screwing the fixing nut on the fixing bolt, connect the two ends of the hoisting rope with the first shackle and the second shackle respectively, adjust the position of the connecting seat to reduce the gap between the first shackle and the second shackle and the hoisting rope, and then connect the second shackle with the lifting hook of the large floating crane.

[0022] S7: The lifting hook of the large floating crane is lifted, and during the lifting, the lifting hook is slowly lowered, and when the roller frame device is 400mm away from the track, the lifting hook is slowly lowered again, and when the roller frame device is 500mm away from the track, the lifting is stopped, the positioning pin is inserted into the AUD base, and then the lifting hook continues to lower, the position of the rotating wind sail body is adjusted through the chain hoist and the traction rope, and the rotating wind sail body is accurately positioned.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] 1. The rotating wind sail single-point hoisting structure provided by the present application divides the two ends of the hoisting rope into equal lengths through the two connecting seats, and the connecting seat can move on the surface of the hoisting rope through the setting of the abutting wheel, thereby reducing the gap between the shackle and the hoisting rope and reducing the rotation of the rotating wind sail body.

[0025] 2. The rotating wind sail single-point hoisting structure provided by the present application connects the second lifting lug and the rotating wind sail body through the chain hoist, controls the inclination and rotation of the rotating wind sail body through the chain hoist, thereby preventing the equipment from tilting as a whole after the rotating wind sail body is lifted, and affecting the safety of the equipment and personnel.

[0026] 3. In the rotating wind sail single-point hoisting structure provided by the present application, the hoisting rope is composed of a flexible lifting belt and a steel wire rope, and the top protection ring is installed, which avoids the direct contact between the hoisting rope and the glass steel outer cylinder and causes damage to the glass steel.

[0027] 4. The single-point hoisting structure of the rotating sail provided by the application, in which a plurality of guide plates are provided in advance, positioning pins are penetrated into the four corners of the AUD base of the ship, and the orientation of the rotating sail body is adjusted by the chain hoist and the traction rope to make it accurately positioned. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Fig. 1 is a schematic view of the hoisting structure of the rotating sail body of the single-point hoisting structure of the rotating sail provided by the application;

[0029] Figure 2 Fig. 2 is a schematic view of the internal structure of the connecting seat of the single-point hoisting structure of the rotating sail provided by the application;

[0030] Figure 3 Fig. 3 is a schematic view of the structure of the hoisting rope of the single-point hoisting structure of the rotating sail provided by the application;

[0031] Figure 4 Fig. 4 is a schematic view of the side view structure of the wharf support jig of the single-point hoisting structure of the rotating sail provided by the application;

[0032] Figure 5 Fig. 5 is a schematic view of the overhead structure of the wharf support jig of the single-point hoisting structure of the rotating sail provided by the application;

[0033] Figure 6 Fig. 6 is a schematic view of the overhead structure of the ship track of the single-point hoisting structure of the rotating sail provided by the application;

[0034] Figure 7 Fig. 7 is a schematic view of the AUD base structure of the ship of the single-point hoisting structure of the rotating sail provided by the application;

[0035] Figure 8 Fig. 8 is a schematic view of the chain hoist and its related structure of the single-point hoisting structure of the rotating sail provided by the application;

[0036] Figure 9 Fig. 9 is a schematic view of the top protection ring structure of the single-point hoisting structure of the rotating sail provided by the application.

[0037] In the drawings: 1, rotating sail body; 2, first lifting lug; 3, first shackle; 4, hoisting rope; 5, second shackle; 6, connecting seat; 7, connecting plate; 8, side plate; 9, abutting wheel; 10, ear plate; 11, fixing hole; 12, fixing bolt; 13, wharf support jig; 14, wharf AUD base; 15, first guide plate; 16, second guide plate; 17, ship track; 18, ship AUD base; 19, third guide plate; 20, second lifting lug; 21, chain hoist; 22, top protection ring; 23, positioning screw hole; 24, flexible sling; 25, steel rope; 26, spring; 27, telescopic rod; 28, positioning pin. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Embodiment 1:

[0040] Please refer to Figures 1-9 The present application provides a technical solution: a single-point hoisting structure of a rotating sail, comprising a rotating sail body 1, a wharf support jig frame 13, a ship rail 17, a second lifting lug 20 and a hand-operated hoist 21, the outer surface of the rotating sail body 1 is provided with a first lifting lug 2, the first lifting lug 2 is provided with a first unloading buckle 3, the other end of the first unloading buckle 3 is provided with a hoisting rope 4, the hoisting rope 4 is annular as a whole, the two ends of the hoisting rope 4 are movably sleeved with connecting seats 6, the interiors of the connecting seats 6 are provided with two connecting plates 7, the opposite outer surfaces of the two connecting plates 7 are fixedly connected with two side plates 8, the outer surfaces of the two side plates 8 are rotatably connected with a rotating shaft, the outer surface of the rotating shaft is fixedly sleeved with an abutting wheel 9, the opposite outer surfaces of the connecting seats 6 at the two ends of the hoisting rope 4 are fixedly connected with ear plates 10, the outer surface of each ear plate 10 is provided with a fixing hole 11, the interior of each fixing hole 11 is threadedly connected with a fixing bolt 12, and the outer surface of each fixing bolt 12 is threadedly connected with a fixing nut.

[0041] In the present embodiment, the left and right inner surfaces of each connecting seat 6 are fixedly connected with two springs 26 and two telescopic rods 27, the other ends of the two springs 26 and the two telescopic rods 27 are fixedly connected with the connecting plate 7, the spring 26 is sleeved on the outer surface of the telescopic rod 27, specifically, the spring 26 is arranged to make the abutting wheel 9 tightly abut against the surface of the hoisting rope 4 by the elastic force of the spring 26, and the telescopic rod 27 is telescoped along with the deformation of the spring 26, so that the spring 26 is prevented from being inclined and deformed.

[0042] In the specific implementation process, the ears 10 of the two connecting seats 6 are correspondingly arranged, the fixing bolts 12 are screwed into the fixing holes 11, the fixing nuts are screwed, the ears 10 of the two connecting seats 6 are connected, and the two connecting seats 6 are fixed. At this time, the connecting part of the two connecting seats 6 divides the two ends of the hoisting rope 4 into the same length, and then the one end of the hoisting rope 4 is connected with the second shackle 5. After the connection is completed, the connecting seat 6 is pulled in the direction close to the first shackle 3 or the second shackle 5, so that the abutting wheel 9 moves on the surface of the hoisting rope 4, so that the gap between the hoisting rope 4 and the second shackle 5 is reduced. Then the second shackle 5 is connected with the lifting end of the large floating crane, the large floating crane lifts the rotating sail body 1, the other end of the connecting seat 6 is installed, and the same way is adopted. Then the one end of the hoisting rope 4 is connected with the first shackle 3, and the length of the hoisting rope 4 at both ends is consistent, so that the rotating phenomenon of the rotating sail body 1 is reduced.

[0043] Embodiment 2

[0044] Please refer to Figures 1-9 The present application provides a technical solution: in the embodiment, the two sides of the wharf supporting cradle 13 are provided with wharf tracks and wharf AUD bases 14, the first guide plates 15 are welded at the ends of the wharf AUD bases 14 away from the wharf supporting cradle 13, and the second guide plates 16 are welded at the opposite outer surfaces of the left and right AUD bases.

[0045] In the embodiment, the ship AUD bases 18 are arranged at one side of the ship tracks 17, the third guide plates 19 are welded at the opposite outer surfaces of the left and right ship AUD bases 18 and the outer surfaces of the ship AUD bases 18 away from the ship tracks 17. Specifically, the rotating sail body 1 is guided by the plurality of guide plates.

[0046] In the embodiment, the positioning pins 28 are arranged at the four corners of the ship AUD bases 18. Specifically, the rotating sail body 1 is positioned and guided by the positioning pins 28 inserted into the four corners of the AUD bases and the guide plates.

[0047] In the specific implementation process, in the lowering process, the hook of the large floating crane is slowly lowered, and when the roller frame device of the equipment is lowered to about 400 mm away from the ship tracks 17, the base of the rotating sail body 1 approaches the third guide plate 19 on the ship, and then the roller frame device of the equipment is stopped from lowering when it is about 50 mm away from the ship tracks 17. After the positioning pins 28 are inserted into the four corners of the ship AUD bases 18, the hook continues to lower, the direction of the rotating sail body 1 is adjusted by the hand-operated hoist 21, and finally the rotating sail body 1 is accurately positioned, and the hoisting work is completed.

[0048] Embodiment 3

[0049] Please refer to Figures 1-9 The present application provides a technical solution: a top protection ring 22 is arranged at the top hatch opening of the rotating sail body 1, and a plurality of positioning screw holes 23 arranged in a circumferential array are formed around the top protection ring 22.

[0050] In the embodiment, the hoisting rope 4 includes a steel rope 25 and a flexible sling 24, the flexible sling 24 is sleeved outside the steel rope 25, and specifically, the hoisting rope 4 has a certain rigidity by the combination of the flexible sling 24 and the steel rope 25, and damage to the glass steel by the steel rope 25 is avoided.

[0051] In the specific implementation process, the top protection ring 22 is fixed by positioning bolts, and when the rotating sail body 1 is too close to the edge of the equipment due to uncontrollable factors, the top protection ring 22 avoids direct contact between the hoisting rope 4 and the glass steel outer cylinder, thereby preventing damage to the glass steel.

[0052] The embodiment also relates to a hoisting method using the above-mentioned single-point hoisting structure of the rotating sail, comprising the following steps:

[0053] S1: installing the wharf track and the wharf AUD base 14 on the wharf test site, installing the ship track 17 and the ship AUD base 18 on the ship, and prefabricating positioning pins 28 matched with the four corners of the wharf AUD base 14 and the ship AUD base 18.

[0054] S2: welding the first guide plate 15, the second guide plate 16 and the third guide plate 19 on the surfaces of the wharf AUD base 14 and the ship AUD base 18 respectively.

[0055] S3: welding the second lifting lug 20 around the wharf test site and the ship, and connecting the second lifting lug 20 and the rotating sail body 1 through the chain hoist 21.

[0056] S4: installing the top protection ring 22 at the top hatch opening of the rotating sail body 1.

[0057] S6: connecting the first shackle 3 and the first lifting lug 2, screwing the fixing bolt 12 into the corresponding fixing hole 11, connecting the corresponding two connecting seats 6 by screwing the fixing nut on the fixing bolt 12, connecting the two ends of the hoisting rope 4 with the first shackle 3 and the second shackle 5 respectively, adjusting the position of the connecting seat 6 to reduce the gap between the first shackle 3 and the second shackle 5 and the hoisting rope 4, and connecting the second shackle 5 and the hook of the large floating crane.

[0058] S7: the large floating crane hook hoisting, in the process of lowering, the hook slowly down, down to the roller frame device from the track 400mm, and then slowly down, so that the roller frame device from the track 500mm, stop down, the positioning pin 28 is inserted into the AUD base, and then the hook continues to down, through the hand-operated hoist 21 and the traction rope to adjust the orientation of the rotating wind sail body 1, so that it is accurately positioned.

[0059] Working principle: when the hoisting structure is used, the ears 10 of the two connecting seats 6 are correspondingly connected, the fixing bolts 12 are screwed into the fixing holes 11, and the fixing nuts are screwed on, so that the ears 10 of the two connecting seats 6 are connected, thereby fixing the two connecting seats 6. At this time, the connecting part of the two connecting seats 6 divides the two ends of the hoisting rope 4 into the same length. After the connection is completed, the connecting seat 6 is pulled in the direction close to the first shackle 3 or the second shackle 5, so that the abutting wheel 9 moves on the surface of the hoisting rope 4, thereby reducing the gap between the hoisting rope 4 and the second shackle 5. Then the second shackle 5 is connected with the lifting end of the large floating crane, the rotating wind sail body 1 is lifted by the large floating crane, and the other end of the connecting seat 6 is installed and connected with the first shackle 3 in the same way. The length of the hoisting rope 4 at both ends is consistent, which reduces the rotation of the rotating wind sail body 1.

[0060] When hoisting, one end of the hand-operated hoist 21 on the wharf hoisting site is connected with the second lifting lug 20, and the lifting end is connected with the rotating wind sail body 1. The inclination and rotation of the rotating wind sail body 1 are controlled by the hand-operated hoist 21, and the curvature of the rotating wind sail body 1 during lifting and lowering is controlled by the hand-operated hoist 21 on the ship, so as to prevent the rotating wind sail body 1 from tilting after being lifted, which affects the safety of the equipment and personnel.

[0061] The top protection ring 22 is fixed by the positioning bolt. When the rotating wind sail body 1 is too close to the edge of the equipment due to uncontrollable factors, the top protection ring 22 avoids the direct contact between the hoisting rope 4 and the glass steel outer cylinder, which causes damage to the glass steel.

[0062] During the lowering process, the hook of the large floating crane is slowly lowered, and when the roller frame device of the equipment is lowered to about 400mm away from the ship track 17, the base of the rotating wind sail body 1 approaches the third guide plate 19 on the ship, and then slowly down to stop the roller frame device of the equipment from the ship track 17 about 50mm. After the positioning pin 28 is inserted into the AUD base 18 of the ship, the hook continues to down, the orientation of the rotating wind sail body 1 is adjusted by the hand-operated hoist 21, and finally it is accurately positioned to complete the hoisting work.

[0063] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A rotating sail single point lifting structure comprising a rotating sail body (1), a wharf support cradle (13), a ship track (17), a second lifting lug (20) and a hand chain block (21), characterized in that: The outer surface of the rotating wind sail body (1) is provided with a first lifting lug (2), a first shackle (3) is arranged at the first lifting lug (2), one end of the first shackle (3) is provided with a lifting rope (4), the lifting rope (4) is annular as a whole, the two ends of the lifting rope (4) are movably sleeved with a connecting seat (6), the inside of the connecting seat (6) is provided with two connecting plates (7), the opposite outer surfaces of the two connecting plates (7) are fixedly connected with two side plates (8), the outer surfaces of the two side plates (8) are rotatably connected with a rotating shaft, the outer surface of the rotating shaft is fixedly sleeved with an abutting wheel (9), the opposite outer surfaces of the connecting seats (6) at the two ends of the lifting rope (4) are fixedly connected with an ear plate (10), the outer surface of the ear plate (10) is provided with a fixing hole (11), the inside of the fixing hole (11) is threadedly connected with a fixing bolt (12), and the outer surface of the fixing bolt (12) is threadedly connected with a fixing nut.

2. A single point lifting structure for a rotating sail according to claim 1, wherein: The two sides of the wharf support cradle (13) are provided with wharf tracks and wharf AUD bases (14), one end of the wharf AUD base (14) away from the wharf support cradle (13) is welded with a first guide plate (15), and the opposite outer surfaces of the AUD bases on the left and right sides are welded with second guide plates (16).

3. A single point lifting structure for a rotating sail according to claim 1, wherein: One side of the ship track (17) is provided with a ship AUD base (18), and the opposite outer surfaces of the two ship AUD bases (18) and the outer surface of the ship AUD base (18) away from the ship track (17) are welded with third guide plates (19).

4. A single point lifting structure for a rotating sail according to claim 1, wherein: The top of the rotating wind sail body (1) is provided with a top protection ring (22), and a plurality of positioning screw holes (23) arranged in a circumferential array are formed around the top protection ring (22).

5. A single point lifting structure for a wind sail according to claim 1, wherein: The lifting rope (4) comprises a steel rope (25) and a flexible sling (24), and the flexible sling (24) is sleeved outside the steel rope (25).

6. A single point lifting structure for a rotating sail according to claim 3, wherein: The four corners of the ship AUD base (18) are provided with positioning pins (28).

7. A single point lifting structure for a rotary sail according to claim 1, characterized in that: The left and right inner surfaces of the connecting seat (6) are fixedly connected with two springs (26) and two telescopic rods (27), one end of the two springs (26) and the two telescopic rods (27) is fixedly connected with the connecting plate (7), and the spring (26) is sleeved outside the telescopic rod (27).

8. A method for single point lifting of a rotating sail using the single point lifting structure of any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1: installing the wharf track and the wharf AUD base (14) on the wharf test site, installing the ship track (17) and the ship AUD base (18) on the ship, and pre-preparing the positioning pins (28) matched with the four corners of the wharf AUD base (14) and the ship AUD base (18); S2: welding the first guide plate (15), the second guide plate (16) and the third guide plate (19) on the surfaces of the wharf AUD base (14) and the ship AUD base (18) respectively; S3: welding the second lifting lug (20) around the wharf test site and the ship, and connecting the second lifting lug (20) and the rotating wind sail body (1) through the chain hoist (21). S4: Install the top protection ring (22) at the top hatch cover of the rotating wind sail body (1); S6: Connect the first shackle (3) with the first lifting lug (2), screw the fixing bolt (12) into the corresponding fixing hole (11), connect the corresponding two connecting seats (6) by screwing the fixing nut on the fixing bolt (12), connect the two ends of the hoisting rope (4) with the first shackle (3) and the second shackle (5) respectively, adjust the position of the connecting seat (6) to reduce the gap between the first shackle (3) and the second shackle (5) and the hoisting rope (4), and then connect the second shackle (5) with the hook of the large floating crane; S7: The hook of the large floating crane is lifted, during the lifting, the hook is slowly lowered, and when the roller frame device is 400 mm away from the track, the lowering is slowly continued, and when the roller frame device is 500 mm away from the track, the lowering is stopped, the positioning pin (28) is inserted into the AUD base, and then the hook continues to be lowered, the orientation of the rotating wind sail body is adjusted through the hand-operated hoist (21) and the traction rope, and the rotating wind sail body is accurately positioned.

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