A Method for Side-mounted Transportation of Large Valves

Abstract

The present invention discloses a method for side-mounted transportation of large valves. By using a complete set of equipment such as a single-rail pulley, a heavy-duty roller trolley, a sling, and a special transportation frame, it solves the problem of easy instability and overturning during the transportation process caused by the irregular shape, high center of gravity, severe eccentricity, and inability to maintain a vertical upright posture of the valve, and realizes the precise positioning and installation of the valve.

Description

Technical Field

[0001] The present invention relates to the field of valve transportation in liquefied natural gas or offshore platform modules, and particularly to a method for side-loading and transporting large valves. Background Art

[0002] There is a type of valve on liquefied natural gas modules or offshore platform modules, which consists of a valve body and an actuator, and is large in weight and size. Due to the mismatch between the project construction period and the valve arrival plan, when the valve arrives, the upper structure deck sheets at its location have been assembled and fastened, and the valve cannot be directly lifted to the final installation position. Therefore, the valve has to enter from one side of the structure module and be transported to the final installation position. The valve consists of a valve body and an actuator, with a weight of up to dozens of tons or more, an extremely irregular shape, a high center of gravity, and an eccentricity problem, making it impossible to maintain a vertical upright posture. The side-loading and transportation to the installation position is difficult and risky.

[0003] The prior art has the following problems:

[0004] Different from conventional equipment and instruments with regular shapes, the side-loading and transportation of large valves are rather special. There has been no set of standardized methods to guide construction operations in the past. The tools and equipment selected by on-site construction personnel are relatively single and scarce, and they often rely on manual labor to adopt non-standard, risky and cumbersome operation methods, which are prone to cause safety accidents or damage to the valves. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to provide a method for side-loading and transporting large valves, which can perform side-loading and transportation of large valves, with safer operation, without damaging the valves and posing safety hazards to construction personnel.

[0006] To solve the above technical problem, the present invention provides a method for side-loading and transporting large valves, which is completed by the following steps:

[0007] S1. Based on the size, weight and center of gravity of the valve, design and manufacture a transportation frame, and at the same time, set limiting structures on the transportation frame according to the specific sizes of the valve body and the actuator;

[0008] S2. Use a crane to lift the valve and place it inside the transportation frame. The upper and lower limiting structures fix the valve body of the valve, keeping the valve in a vertical upright posture;

[0009] S3. Plan the path for side-loading and transporting the valve, lay transportation tracks on the structural deck along the path, and then place four heavy-duty roller cars inside the tracks;

[0010] S4. Set a single-rail slide beam above the transportation track, hang a single-rail trolley on the slide beam, and connect a sling under the single-rail trolley;

[0011] S5. Place the valve and the transportation frame as a whole on the heavy-duty roller cart, and set a traction device in the front to tow and move it. At the same time, the monorail trolley is connected to the actuator of the valve through a sling. During the transportation process, the monorail trolley and the transportation frame remain synchronized to prevent the valve from shaking and becoming unstable during movement.

[0012] S6. Hang another two monorail trolleys above the vicinity of the final installation position of the valve. When the valve and the transportation frame reach the vicinity of the installation position, connect the newly added two monorail trolleys to the valve body through slings to lift the valve body.

[0013] S7. Remove the limiting structure on the transportation frame, use one monorail trolley to lift the actuator of the valve, and use the other two monorail trolleys to lift the valve body. The three monorail trolleys work together to hoist the valve, adjust the height and posture of the valve to prevent the valve from shaking and becoming unstable. At the same time, tie slings on both sides of the valve, install manual hoists on the slings, and use the manual hoists on both sides to move the valve with the slings to cooperate with adjusting the position of the valve in the horizontal direction, and align the valve with the pipeline nozzle, thus completing the side-mounted transportation of the valve.

[0014] Further, in step S1, the limiting structure fixes the valve body of the valve to keep the valve in a vertical and upright posture. The transportation frame can bear the weight of the valve, reduce the overall center of gravity, increase the bottom area, and ensure the stability during transportation.

[0015] The technical effect of the present invention is as follows: The present invention uses tools such as monorail trolleys, heavy-duty roller carts, slings and a complete set of equipment of a special transportation frame to solve the problem of easy instability and overturning during transportation caused by the irregular shape, high center of gravity, serious eccentricity and inability to maintain a vertical and upright posture of the valve, and realizes the precise installation of the valve in place. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the valve in a method for side-mounted transportation of a large valve provided by the present invention.

[0017] Figure 2 It is a schematic diagram of the transportation frame in a method for side-mounted transportation of a large valve provided by the present invention.

[0018] Figure 3 It is a front view of the valve during transportation in a method for side-mounted transportation of a large valve provided by the present invention.

[0019] Figure 4 It is a schematic diagram of the valve during hoisting in a method for side-mounted transportation of a large valve provided by the present invention.

[0020] Among them, 1. valve body, 2. actuator, 3. transportation frame, 4. limit structure, 5. transportation track, 6. heavy-duty roller trolley, 7. single-rail slide beam, 8. single-rail trolley, 9. sling, 10. traction device. Specific implementation manners

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0022] An embodiment of the present invention provides a method for side-mounted transportation of a large valve. Combining with the attached Figures 1-4 As shown, 1. A method for side-mounted transportation of a large valve is completed by the following steps:

[0023] S1. Based on the size, weight and center of gravity of the valve, design and manufacture the transportation frame 3, and at the same time, set the limit structure 4 on the transportation frame 3 according to the specific sizes of the valve body 1 and the actuator 2 of the valve.

[0024] S2. Use a crane to hoist the valve and place it inside the transportation frame 3. The upper and lower limit structures 4 fix the valve body 1 of the valve to keep the valve in a vertical and upright posture.

[0025] S3. Plan the path for side-mounted transportation of the valve, and lay the transportation track 5 on the structural deck along the path. Then place four heavy-duty roller trolleys 6 inside the track.

[0026] S4. A single-rail slide beam 7 is arranged above the transportation track 5, and a single-rail trolley 8 is suspended on the slide beam. A sling 9 is connected below the single-rail trolley 8.

[0027] S5. Place the valve and the transportation frame 3 as a whole on the heavy-duty roller trolley 6, and set a traction device 10 in the front to drag and move. At the same time, the single-rail trolley 8 is connected to the actuator 2 of the valve through the sling 9. During the transportation process, the single-rail trolley 8 and the transportation frame 3 are kept synchronized to prevent the valve from shaking and becoming unstable during movement.

[0028] S6. Suspend two more single-rail trolleys 8 above the vicinity of the final installation position of the valve. When the valve and the transportation frame 3 reach the vicinity of the installation position, connect the newly added two single-rail trolleys 8 to the valve body 1 of the valve through the sling 9 to lift the valve body 1.

[0029] S7. Remove the limit structure 4 on the transfer frame 3, use a single-track pulley 8 to lift the actuator 2 of the valve, and use another two single-track pulleys 8 to lift the valve body 1 of the valve. The three single-track pulleys 8 work together to hoist the valve, adjust the height and attitude of the valve, prevent the valve from shaking and becoming unstable. At the same time, tie slings 9 on both sides of the valve, install chain hoists on the slings 9, and use the chain hoists on both sides and the slings 9 to move the valve, and cooperate to adjust the position of the valve in the horizontal direction, and align the valve with the pipeline nozzle, thus completing the side-mounted transfer of the valve.

[0030] In step S1, the limit structure 4 fixes the valve body 1 of the valve, keeps the valve in a vertical and upright posture, the transfer frame 3 can bear the weight of the valve, reduce the overall center of gravity, increase the bottom area, and ensure the stability during transfer.

[0031] Specifically, the valve to be transferred is placed on the heavy-duty roller trolley 6 for transfer. The heavy-duty roller trolley 6 is placed in the transfer track 5 and towed by the traction device 10. At the same time, a single-track pulley 8 is connected above the valve to be transferred to restrain and correct the valve to prevent instability, shaking and even overturning.

[0032] Specifically, when transferring to near the installation position, use a single-track pulley 8 to lift the actuator 2 of the valve, and use another two single-track pulleys 8 to lift the valve body 1 of the valve. The three single-track pulleys 8 work together to hoist the valve, adjust the height and attitude of the valve, prevent the valve from shaking and becoming unstable. At the same time, use the chain hoists on both sides and the slings 9 (the slings 9 are wound and tied on the valve) to move the valve, and cooperate to adjust the position of the valve in the horizontal direction, and align the valve with the pipeline nozzle to achieve the precise installation of the valve.

[0033] The above-described embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A method for side-mounted transportation of a large valve, which is completed by the following steps, and is characterized in that: S1. Based on the size, weight and center of gravity of the valve, design and manufacture a transportation frame, and at the same time, set a limiting structure on the transportation frame according to the specific sizes of the valve body and the actuator; S2. Use a crane to hoist the valve and place it inside the transportation frame. The upper and lower limiting structures fix the valve body of the valve to keep the valve in a vertical and upright posture; S3. Plan the path for side-mounted transportation of the valve, lay a transportation track on the structural deck along the path, and then place four heavy-duty roller cars inside the track; S4. Set a single-rail slide beam above the transportation track, hang a single-rail trolley on the slide beam, and connect a sling under the single-rail trolley; S5. Place the valve and the transportation frame as a whole on the heavy-duty roller cars, set a traction device in the front to tow and move, and at the same time, connect the single-rail trolley to the actuator of the valve through the sling. During the transportation process, the single-rail trolley and the transportation frame keep in sync to prevent the valve from shaking and losing stability when moving; S6. Hang two more single-rail trolleys above the vicinity of the final installation position of the valve. When the valve and the transportation frame reach the vicinity of the installation position, connect the newly added two single-rail trolleys to the valve body through the sling to lift the valve body; S7. Remove the limiting structure on the transportation frame, use a single-rail trolley to lift the actuator of the valve, and use the other two single-rail trolleys to lift the valve body. The three single-rail trolleys work together to hoist the valve, adjust the height and posture of the valve to prevent the valve from shaking and losing stability. At the same time, tie slings on both sides of the valve, install manual hoists on the slings, and use the manual hoists on both sides to move the valve in cooperation with the slings to adjust the position of the valve in the horizontal direction, and align the valve with the pipeline nozzle, thus completing the side-mounted transportation of the valve.

2. A method for side-mounted transportation of a large valve according to claim 1, characterized in that: The limiting structure fixes the valve body of the valve to keep the valve in a vertical and upright posture. The transportation frame can bear the weight of the valve, reduce the overall center of gravity, increase the bottom area, and ensure the stability during transportation.

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