Auxiliary device for rotation of installation angle of vertical pipe and construction method of auxiliary device

Abstract

The invention discloses an auxiliary device for vertical pipe installation angle rotation and a construction method thereof.The auxiliary device for vertical pipe installation angle rotation comprises a connecting pipe and a vertical plate, the vertical plate is connected to the connecting pipe, a connecting hole is formed in the vertical plate, the connecting hole is connected with a flange arranged on the vertical pipe through a bolt, and the end of the bolt is in threaded connection with a fastening nut; the end, away from the vertical plate, of the connecting pipe is connected with a connecting plate, the connecting plate is connected with a chain block, so that the vertical pipe is located in the vertical direction, and the vertical pipe is horizontally rotated. According to the auxiliary device for rotation of the installation angle of the vertical pipe, the vertical plate of the connecting pipe is connected with the flange at the end of the vertical pipe, the connecting pipe is adjusted, angle rotation of the vertical pipe is controlled from water, real-time fine adjustment is conducted, rotation of the vertical pipe in the design direction is rapidly completed, and the construction cost is saved. The device is not limited by the length and weight of the vertical pipe, the rotating target can be achieved when friction force is large, and an anti-corrosion layer on the surface of the vertical pipe is not prone to being damaged.

Description

Technical Field

[0001] The invention belongs to the field of offshore oil engineering, and in particular relates to an auxiliary device for rotating the installation angle of a riser and a construction method thereof. Background Art

[0002] During the installation of submarine pipeline risers, after the risers are hoisted to the riser clamps, the direction of the risers needs to be adjusted to ensure that the risers and the conductor racks are parallel and in line with the submarine pipeline routing design. Therefore, how to rotate the risers becomes the first problem to be solved.

[0003] When adjusting the direction of rotation on the water, a sling is generally used to wrap around the surface of the riser, and a hand winch is used for traction adjustment. This adjustment method is limited by the length and weight of the riser. When the friction is large, it is generally difficult to achieve the goal of rotation, and it is easy to damage the anti-corrosion layer on the surface of the riser. When adjusting the direction of the riser by a ship winch underwater, it is limited by underwater construction and the traction distance and traction force cannot be controlled at any time for fine-tuning. Repeated adjustments are required, and the operation requires the ship's weather window and tidal interval, so the construction time is long, which is not conducive to cost control.

[0004] Therefore, it is urgent to design an auxiliary device for rotating the installation angle of the riser to solve the above-mentioned problem of rotating the riser angle. Summary of the invention

[0005] In order to solve the technical problems mentioned in the background technology that a sling is used to wrap around the surface of the riser on water and a hand winch is used for traction adjustment, it is difficult to achieve the goal of rotation when the friction is large, and the anti-corrosion layer on the surface of the riser is easily damaged; when the direction of the riser is adjusted by a ship winch underwater, it is limited by underwater construction and the traction distance and traction force cannot be controlled and fine-tuned at any time. An auxiliary device for rotating the installation angle of the riser is provided to solve the problem of rotating the angle of the riser.

[0006] In order to achieve the above-mentioned purpose, the specific technical scheme of the auxiliary device for rotating the standpipe installation angle of the present invention is as follows: An auxiliary device for rotating the installation angle of a vertical pipe comprises a connecting pipe and a vertical plate. The vertical plate is connected to the connecting pipe. A connecting hole is provided on the vertical plate. The connecting hole is connected to a flange provided on the vertical pipe through a bolt. A fastening nut is threaded on the end of the bolt to connect the connecting pipe to the vertical pipe. A connecting plate is connected to the end of the connecting pipe away from the vertical plate. The connecting plate is connected to a hand winch to keep the vertical pipe in a vertical direction and rotate the vertical pipe horizontally.

[0007] Furthermore, the vertical plate is vertically welded to the outer wall of one end of the connecting pipe.

[0008] Furthermore, a first connecting hole and a second connecting hole are provided at intervals on a side of the vertical plate away from the connecting pipe.

[0009] Furthermore, bolts are inserted into the first connection hole and the second connection hole respectively and are screwed to the screw holes of the flange.

[0010] Furthermore, both ends of the bolt are threaded with fastening nuts to fix the connecting pipe and the flange.

[0011] Furthermore, a first connecting plate and a second connecting plate are welded to one end of the connecting pipe away from the vertical plate.

[0012] Furthermore, the first connecting plate and the second connecting plate are symmetrically welded to the outer wall of the connecting pipe.

[0013] Furthermore, the first connecting plate and the second connecting plate are both provided with openings at one end away from the connecting pipe so that the hand chain hoist can be connected to the openings.

[0014] A construction method of an auxiliary device for rotating a vertical pipe installation angle mainly comprises the following steps: S1. Connect the vertical plate and flange by bolts when the vertical pipe is in horizontal state; S2, the sling lifts the riser connected with the connecting pipe, and the riser is in a vertical state; S3, the hand chain hoist is connected to the first connecting plate, and the riser rotates clockwise; S4. The hand hoist is connected to the second connecting plate, and the vertical pipe rotates counterclockwise.

[0015] Furthermore, the connecting pipe is a cylinder, and the interior of the connecting pipe is a hollow structure.

[0016] The auxiliary device for rotating the vertical pipe installation angle and the construction method thereof of the present invention have the following advantages: By connecting the vertical plate of the connecting pipe with the flange at the end of the riser, adjusting the connecting pipe, controlling the rotation of the riser angle from the water, and making real-time fine adjustments, the rotation of the riser design direction can be quickly completed, saving construction costs. This application is not limited by the length and weight of the riser, and can also achieve the goal of rotation when the friction force is large, and it is not easy to damage the anti-corrosion layer on the surface of the riser. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the auxiliary device for rotating the standpipe installation angle of the present invention; Figure 2 It is a top view of the auxiliary device for rotating the stand pipe installation angle according to the present invention.

[0018] Description of the markings in the figure: 1. Connecting pipe; 2. Vertical plate; 3. First connecting hole; 4. Second connecting hole; 5. First connecting plate; 6. Second connecting plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 and attached Figure 2 The auxiliary device for the installation angle rotation of the riser of the present invention is described.

[0022] like Figure 1 As shown, the auxiliary device for rotating the vertical pipe installation angle in the present invention includes a connecting pipe 1 and a vertical plate 2. The vertical plate 2 is connected to the connecting pipe 1. A connecting hole is provided on the vertical plate 2. The connecting hole is connected to a flange provided on the vertical pipe through a bolt. A fastening nut is threaded on the end of the bolt to connect the connecting pipe 1 to the vertical pipe. A connecting plate is connected to the end of the connecting pipe 1 away from the vertical plate. The connecting plate is connected to a hand winch to keep the vertical pipe in a vertical direction and rotate the vertical pipe horizontally.

[0023] By connecting the vertical plate 2 of the connecting pipe 1 to the flange at the end of the riser, adjusting the connecting pipe 1, controlling the rotation of the riser angle from the water, and making real-time fine adjustments, the rotation of the riser design direction can be quickly completed, saving construction costs. This application is not limited by the length and weight of the riser, and can also achieve the goal of rotation when the friction force is large, and it is not easy to damage the anti-corrosion layer on the surface of the riser.

[0024] Further, if Figure 1 As shown, the vertical plate 2 is vertically welded to the outer wall of one end of the connecting pipe 1; the vertical plate 2 is provided with a first connecting hole 3 and a second connecting hole 4 at intervals on the side away from the connecting pipe 1; bolts are respectively inserted into the first connecting hole 3 and the second connecting hole 4 and are screwed to the screw holes of the flange.

[0025] In this embodiment, preferably, the vertical plate 2 is welded to the outer wall of the connecting pipe 1 in a trapezoidal shape, and the vertical plate 2 can also be set in a rectangular shape. The vertical plate 2 is provided with a first connecting hole 3 and a second connecting hole 4 at intervals on the side away from the connecting pipe 1. The first connecting hole 3 and the second connecting hole 4 are both circular holes; bolts are inserted into the first connecting hole 3 and the second connecting hole 4, and the connecting pipe 1 is connected to the flange through the bolts.

[0026] As a preferred embodiment, a flange is fixedly connected to the end of the vertical pipe, two bolts are screwed on the threaded holes of the flange, and the ends of the bolts are respectively connected to the vertical plates 2, so that two sets of connecting pipes 1 are connected to the flange. The vertical pipe is rotated through the connecting pipes 1, and the rotation force can be appropriately adjusted according to the angle requirements.

[0027] Further, if Figure 1 and Figure 2 As shown, both ends of the bolts are threaded with fastening nuts to fix the connecting pipe to the flange; a first connecting plate 5 and a second connecting plate 6 are welded to one end of the connecting pipe 1 away from the vertical plate.

[0028] In this embodiment, preferably, the ends of both ends of the bolts are respectively threaded with fastening nuts, which fix the connecting pipe 1 to the flange. The diameter of the connecting pipe 1 should be selected to avoid contact with the outer wall of the vertical pipe; the first connecting plate 5 and the second connecting plate 6 are vertically welded at the end of the connecting pipe 1 away from the vertical plate 2, and the first connecting plate 5 and the second connecting plate 6 are the same in shape and size.

[0029] Further, if Figure 1 As shown, the first connecting plate 5 and the second connecting plate 6 are symmetrically welded on the outer wall of the connecting pipe 1; the first connecting plate 5 and the second connecting plate 6 are both provided with openings at one end away from the connecting pipe 1 so that the hand chain hoist can be connected to the openings.

[0030] In the present embodiment, preferably, the first connecting plate 5 and the second connecting plate 6 are symmetrically welded on the outer wall of the connecting pipe 1, and the first connecting plate 5 and the second connecting plate 6 are both provided with openings on the side away from the connecting pipe 1, and the hand chain hoist is connected to the opening of the first connecting plate 5 to make the vertical pipe rotate clockwise; the hand chain hoist is connected to the opening of the second connecting plate 6 to make the vertical pipe rotate counterclockwise.

[0031] The present application also provides a construction method for an auxiliary device for rotating a riser installation angle, which mainly includes the following steps: S1. Connect the vertical plate 2 to the flange by bolts when the vertical pipe is in the horizontal state. According to the diameter and weight of the vertical pipe to be installed, the diameter and thickness of the corresponding connecting pipe 1 are selected by calculation; S2. Determine the maximum length of the connecting pipe 1 according to the operable space at the construction site; S3. Determine the lifting point of appropriate tonnage according to the weight of the riser, and lift the riser connected with the connecting pipe 1 with a sling, so that the riser is in a vertical state; S4. Determine the size of the locking nut screwed on the bolt according to the size of the bolt connected to the flange at the end of the riser; S5. Determine the position of the fixed hanging point on the platform according to the fixed structures at the installation site; S6, the hand chain hoist is connected to the first connecting plate 5, pulling the riser to rotate clockwise; S7, the hand chain hoist is connected to the second connecting plate 6, and pulls the vertical pipe to rotate counterclockwise.

[0032] Further, if Figure 1 As shown, the connecting pipe 1 is a cylinder, and the interior of the connecting pipe 1 is a hollow structure. Preferably, the hollow connecting pipe 1 can reduce the weight, so that the overall weight of the vertical pipe during rotation is lower than the maximum bearing weight of the hanging point, thereby ensuring safe construction and facilitating the rotation of the vertical pipe.

[0033] The auxiliary device based on the rotation of the riser installation angle and its construction method are connected to the flange at the end of the riser through the vertical plate 2 of the connecting pipe 1, and the connecting pipe 1 is adjusted to control the rotation of the riser angle from the water, and real-time fine-tuning is performed to quickly complete the rotation of the riser design direction, saving construction costs. This application is not limited by the length and weight of the riser, and can also achieve the goal of rotation when the friction force is large, and it is not easy to damage the anti-corrosion layer on the surface of the riser.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An auxiliary device for rotating the installation angle of a riser, characterized in that: It includes a connecting pipe and a vertical plate. The vertical plate is connected to the connecting pipe. A connecting hole is arranged on the vertical plate. The connecting hole is connected to the flange provided on the vertical pipe through bolts. A fastening nut is threaded on the end of the bolt to connect the connecting pipe to the vertical pipe. A connecting plate is connected to the end of the connecting pipe away from the vertical plate. The connecting plate is connected to a hand winch to keep the vertical pipe in a vertical direction and rotate the vertical pipe horizontally.

2. The auxiliary device for rotating the vertical pipe installation angle according to claim 1, characterized in that: The vertical plate is vertically welded to the outer wall of one end of the connecting pipe.

3. The auxiliary device for rotating the vertical pipe installation angle according to claim 2, characterized in that: A first connecting hole and a second connecting hole are arranged at intervals on one side of the vertical plate away from the connecting pipe.

4. The auxiliary device for rotating the vertical pipe installation angle according to claim 3, characterized in that: Bolts are respectively inserted into the first connection hole and the second connection hole to be screwed to the screw holes of the flange.

5. The auxiliary device for rotating the vertical pipe installation angle according to claim 4, characterized in that: Both ends of the bolt are threaded with fastening nuts to fix the connecting pipe and the flange.

6. The auxiliary device for rotating the vertical pipe installation angle according to claim 1, characterized in that: A first connecting plate and a second connecting plate are welded to one end of the connecting pipe away from the vertical plate.

7. The auxiliary device for rotating the vertical pipe installation angle according to claim 6, characterized in that: The first connecting plate and the second connecting plate are symmetrically welded to the outer wall of the connecting pipe.

8. The auxiliary device for rotating the vertical pipe installation angle according to claim 7, characterized in that: The first connecting plate and the second connecting plate are both provided with openings at one end away from the connecting pipe so that the hand chain hoist can be connected to the openings.

9. A construction method for an auxiliary device for rotating the vertical pipe installation angle, characterized in that: The main steps include: S1. Connect the vertical plate and flange by bolts when the vertical pipe is in horizontal state; S2, the sling lifts the riser connected with the connecting pipe, and the riser is in a vertical state; S3, the hand chain hoist is connected to the first connecting plate, and the riser rotates clockwise; S4. The hand hoist is connected to the second connecting plate, and the vertical pipe rotates counterclockwise.

10. The construction method of the auxiliary device for the vertical pipe installation angle rotation according to claim 9 is characterized in that: The connecting pipe is a cylinder, and the interior of the connecting pipe is a hollow structure.

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