A straightening device for a deep-sea dynamic riser

Abstract

The utility model discloses a kind of straightening devices for deep-sea dynamic riser, including school pipe frame and multiple sets of fixture assembly installed on the school pipe frame, the fixture assembly includes oppositely installed fixed fixture and movable fixture, the fixed fixture is fixedly installed on the school pipe frame, the movable fixture can be moved relative to the fixed fixture to adjust the distance between the two. A kind of straightening device for deep-sea dynamic riser of the utility model can change the pipeline from curved state to straight state, so as to facilitate the installation of pipeline joint, reduce the working strength, improve the work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline connection technology, specifically relating to a straightening device for deep-sea dynamic risers. Background Technology

[0002] Deep-sea dynamic risers are deep-sea application pipelines composed of a skeleton layer, inner sheath layer, pressure-bearing layer, tensile layer, insulation layer, and cladding layer. Due to their long length, they require coiled storage and transportation. When installing joints, the pipe end must be kept straight for approximately 2 meters. Because the pipe will have some curvature after coiling and cannot be completely straightened, and because the inner skeleton layer, pressure-bearing layer, and tensile layer are all made of steel, the pipe itself is very heavy and cannot be controlled manually. Using overhead cranes or forklifts is cumbersome and cannot meet the requirements for joint installation (deep-sea dynamic pipe joints have a complex structure, numerous fittings, and the pipe must be absolutely horizontal and straight for joint installation). Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a straightening device for deep-sea dynamic risers, which can straighten the pipeline from a bent state, thereby facilitating the installation of pipeline joints, reducing labor intensity, and improving work efficiency.

[0004] Technical solution: The present invention provides a deep-sea dynamic riser straightening device, which includes a riser frame and multiple clamping assemblies installed on the riser frame. The clamping assemblies include fixed clamps and movable clamps installed opposite to each other. The fixed clamps are fixedly installed on the riser frame, and the movable clamps can move relative to the fixed clamps to adjust the distance between the two.

[0005] In some embodiments, the alignment frame is a square tube structure made of square steel.

[0006] In some embodiments, the clamping assemblies are spaced apart and located in a straight line.

[0007] In some embodiments, both the fixed clamp and the movable clamp are open-shaped, and are combined to form a rhomboid clamping structure.

[0008] In some embodiments, the movable fixture is connected to a stroke drive mechanism, which includes a hydraulic cylinder and a positioning guide shaft. Both the hydraulic cylinder and the positioning guide shaft are fixed to the tube straightening frame via a movable fixture support frame.

[0009] In some embodiments, the piston rod of the hydraulic cylinder is fixedly connected to the movable clamp.

[0010] In some embodiments, the positioning guide shaft includes two shafts, which are respectively installed on both sides of the hydraulic cylinder.

[0011] In some embodiments, the hydraulic cylinder is also connected to a solenoid valve switch.

[0012] In some embodiments, the clamping surfaces of the fixed clamp and the movable clamp are provided with a buffer protective layer.

[0013] In some embodiments, the buffer protective layer is made of foam sponge, foam plastic or rubber.

[0014] Beneficial effects: The beneficial effects of this utility model are as follows: (1) The straightening device of this utility model has a clamp assembly with a fixed clamp and a movable clamp. The movable clamp can move horizontally relative to the fixed clamp to adjust the distance between the fixed clamp and the movable clamp, thereby realizing clamping and releasing operations and facilitating the straightening of the pipeline. (2) The straightening device of this utility model adopts multiple sets of clamping components with spacing. Each set of clamping components can perform clamping operations on each layer of the pipe fitting to be straightened, thereby facilitating the installation of pipe joints and improving installation efficiency. (3) In the straightening device of this utility model, the spacing between each set of clamp components can be fixed or adjustable. When an adjustable spacing structure is adopted, the bottom of the fixed clamp and the movable clamp can be connected to the pipe straightening frame through a track, and the fixed clamp and the movable clamp are equipped with locking devices. When an adjustable spacing structure is adopted, the spacing can be flexibly adjusted according to different pipe diameters and the length of the pipes to be connected; (4) The straightening device of this utility model has an open shape for both the fixed clamp and the movable clamp, which are combined to form a rhomboid clamping structure. The fixed clamp and the movable clamp are designed to be open and inclined towards the center, which can ensure that the pipe is horizontally centered. The fixed clamp and the movable clamp are combined to form a rhomboid shape, which is in contact with the four lines of the pipe. The movable clamp can open a sufficiently long space. This structure can satisfy the clamping of pipes with different outer diameters. (5) The straightening device of this utility model uses a hydraulic cylinder to drive and control the movable clamp to move horizontally, thereby adjusting the distance between it and the fixed clamp to clamp the pipe to be straightened; at the same time, each set of clamping components is equipped with an independent hydraulic cylinder, and each set of hydraulic cylinders is connected to the hydraulic station. The hydraulic station is placed at the bottom of the pipe straightening frame to save space and avoid the hydraulic hose from extending outward and affecting the on-site operation. (6) In the straightening device of this utility model, each hydraulic cylinder in the clamping assembly is equipped with an independent solenoid valve switch. Each solenoid valve switch is controlled independently, so as to adjust the clamping sequence according to the bending condition of the pipe. (7) The straightening device of this utility model includes two positioning guide shafts, which are respectively installed on both sides of the hydraulic cylinder and are located on the same horizontal axis as the hydraulic cylinder. The two positioning guide shafts are used for positioning and guiding. When the hydraulic cylinder moves in extension and retraction, they play a supporting and guiding role, thereby improving the stability of the overall movement. (8) The present invention provides a deep-sea dynamic riser straightening device that can change the pipe from a bent state to a straight state, thereby facilitating the installation of pipe joints, reducing the workload and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of one embodiment of the present utility model; Figure 2 for Figure 1 AA structural cross-sectional view; Figure 3 for Figure 2 A magnified view of part B; Figure 4 This is a three-dimensional structural diagram of one embodiment of the present invention. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the orientation or positional relationship shown, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example 1

[0020] like Figure 1 and Figure 2 As shown, a deep-sea dynamic riser straightening device includes a pipe straightening frame 1 and multiple clamping assemblies 2 installed on the pipe straightening frame 1. Each clamping assembly 2 includes a fixed clamp 21 and a movable clamp 22 installed opposite to each other. The fixed clamp 21 is fixedly installed on the pipe straightening frame 1, and the movable clamp 22 can move horizontally relative to the fixed clamp 21 to adjust the distance between the fixed clamp 21 and the movable clamp 22, thereby realizing clamping and releasing operations and facilitating pipe straightening.

[0021] In this embodiment, as Figure 1 As shown, the pipe alignment frame 1 is preferably made of square steel, and the pipe body of the pipe alignment frame 1 is preferably a square tube structure. The pipe alignment frame 1 uses square steel; considering its load-bearing capacity, a 100*100*6 square tube is used, and the platform height is 1000-1200mm, taking into account the convenience of personnel installing joints.

[0022] In this embodiment, as Figure 1 As shown, clamp assembly 2 is used in multiple sets, preferably 3-4 sets. The specific number of clamp assemblies 2 can be flexibly selected according to the required pipe connection length. Figure 1 As shown, each set of clamping components 2 is installed at a certain interval, with a spacing of 300-500mm, and each set of clamping components 2 is located on a straight line.

[0023] Specifically, the spacing between each set of clamp components 2 can be fixed or adjustable. When an adjustable spacing structure is adopted, the bottoms of the fixed clamp 21 and the movable clamp 22 can be connected to the pipe alignment frame 1 via a rail, and both the fixed clamp 21 and the movable clamp 22 are equipped with locking devices. With an adjustable spacing structure, the spacing can be flexibly adjusted according to different pipe diameters and the length of the pipes to be connected.

[0024] In this embodiment, as Figure 2 and Figure 4 As shown, both the fixed clamp 21 and the movable clamp 22 are open-shaped, forming a rhomboid clamping structure. The open shape of the fixed clamp 21 and the movable clamp 22, inclined towards the center, ensures the pipe is horizontally centered. The combination of the fixed clamp 21 and the movable clamp 22 forms a rhombus shape, contacting the four lines of the pipe. The movable clamp 22 can open to a sufficiently long space (100-500mm), allowing this structure to clamp pipes of different outer diameters.

[0025] In this embodiment, as Figure 2 and Figure 3 As shown, a stroke drive mechanism is connected to the movable clamp 22. The stroke drive mechanism includes a hydraulic cylinder 26 and a positioning guide shaft 23. Both the hydraulic cylinder 26 and the positioning guide shaft 23 are fixed to the tube straightening frame 1 through the movable clamp support frame 24.

[0026] In this embodiment, as Figure 4 As shown, the piston rod of the hydraulic cylinder 26 is fixedly connected to the movable clamp 22. Specifically, the fixing method can be bolt fixing or thread fixing. In this utility model, the movable clamp 22 is driven and controlled to move horizontally by the hydraulic cylinder 26, thereby adjusting the distance between it and the fixed clamp 21 to clamp the pipe to be straightened. At the same time, each set of clamping components 2 is equipped with an independent hydraulic cylinder 26, and each set of hydraulic cylinders 26 is connected to the hydraulic station. The hydraulic station is placed at the bottom of the pipe straightening frame 1 to save space and avoid the hydraulic hoses extending outwards and affecting on-site operations.

[0027] In this embodiment, each hydraulic cylinder 26 in each group is equipped with an independent solenoid valve switch, and each solenoid valve switch is controlled independently, so that the clamping sequence can be adjusted according to the bending condition of the pipe.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the positioning guide shaft 23 includes two shafts, respectively installed on both sides of the hydraulic cylinder 26, and located on the same horizontal axis as the hydraulic cylinder 26. In this invention, the two positioning guide shafts 23 serve a positioning and guiding function, providing support and guidance when the hydraulic cylinder 26 moves telescopically, thus improving the overall stability of the movement. A bushing 25 and a bushing pressure plate are provided at the connection between the positioning guide shaft 23 and the movable clamp support frame 24, allowing the two positioning guide shafts 23 to move horizontally telescopically along with the hydraulic cylinder 26. Simultaneously, the ends of the two positioning guide shafts 23 are connected to the movable clamp 22 via hexagonal nuts.

[0029] In this embodiment, the clamping surfaces of the fixed clamp 21 and the movable clamp 22 are provided with a buffer protective layer. This buffer protective layer can reduce wear and scratches caused by friction between the clamping surface and the pipe surface, thereby further protecting the pipe.

[0030] More preferably, the buffer protective layer is made of foam sponge, foam plastic, or rubber, or other protective materials.

[0031] In practical use, the straightening device of this utility model first opens each set of movable clamps 22 to accommodate the pipe to be straightened. Then, by sequentially activating the solenoid valves of each hydraulic cylinder, the clamping order can be adjusted according to the bending condition of the pipe until all movable clamps 22 have secured the pipe. Finally, the pipe joint is installed. After the joint is installed, each set of hydraulic cylinders is opened sequentially. The pipe straightening rack is fixed by its own weight, and when changing its location, it can be directly transported to the designated location using a crane, making it convenient to move.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A straightening device for deep-sea dynamic risers, characterized in that: The device includes a pipe alignment frame and multiple clamping assemblies mounted on the pipe alignment frame. Each clamping assembly includes a fixed clamp and a movable clamp mounted opposite to each other. The fixed clamp is fixedly mounted on the pipe alignment frame, and the movable clamp can move relative to the fixed clamp to adjust the distance between the two. The clamping components in each group are installed at intervals and are located in a straight line. Both the fixed clamp and the movable clamp are open in shape and are combined to form a diamond-shaped clamping structure. The movable clamp is connected to a stroke drive mechanism, which includes a hydraulic cylinder and a positioning guide shaft. Both the hydraulic cylinder and the positioning guide shaft are fixed to the tube straightening frame through the movable clamp support frame. Each hydraulic cylinder in each group is equipped with an independent solenoid valve switch, and each solenoid valve switch is controlled independently.

2. The straightening device for deep-sea dynamic riser according to claim 1, characterized in that: The alignment frame is a square tube structure made of square steel.

3. The straightening device for deep-sea dynamic riser according to claim 1, characterized in that: The piston rod of the hydraulic cylinder is fixedly connected to the movable clamp.

4. The straightening device for deep-sea dynamic riser according to claim 1, characterized in that: The positioning guide shaft includes two shafts, which are respectively installed on both sides of the hydraulic cylinder.

5. A straightening device for a deep-sea dynamic riser according to claim 1, characterized in that: The clamping surfaces of the fixed clamp and the movable clamp are provided with a buffer protective layer.

6. A straightening device for a deep-sea dynamic riser according to claim 5, characterized in that: The buffer protective layer is made of foam sponge, foam plastic or rubber.

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