A magnetic powder coating weight structure for thermoplastic composite pipe

Abstract

The utility model provides a kind of magnetic powder coating counterweight structure for thermoplastic composite pipe, including TCP pipe, the surface of the TCP pipe is provided with TCP outer sheath layer, the surface of the TCP outer sheath layer is provided with magnetic powder counterweight layer, connecting module is arranged between the TCP outer sheath layer and magnetic powder counterweight layer, the surface of the magnetic powder counterweight layer is provided with protection module;The TCP outer sheath layer is sleeved on the surface of TCP pipe, the connecting module is connected to TCP outer sheath layer and magnetic powder counterweight layer;Magnetic powder counterweight layer can be once extrusion forming, avoid the problem needing to install on site, greatly improve installation efficiency, while magnetic powder counterweight layer is whole circle cladding to TCP outer sheath layer, increase the contact area of TCP outer sheath layer and magnetic powder counterweight layer, prevent TCP outer sheath layer and magnetic powder counterweight layer local contact, appear stress concentration phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of thermoplastic composite pipes, and specifically to a magnetic powder coating counterweight structure for thermoplastic composite pipes. Background Technology

[0002] Thermoplastic composite pipes (TCPs) have broad application prospects in marine oil and gas, submarine hydrogen and carbon dioxide transportation scenarios due to their advantages such as corrosion resistance, lightweight and high strength, coil laying capability, and long maintenance cycle. However, in deep water and strong current applications, insufficient self-weight and excessive buoyancy of TCPs lead to problems such as insufficient stability on the seabed, vibration at crossing sections, and scouring and slippage in shallow water. The industry is trending towards integrated counterweights during the manufacturing stage to reduce offshore installation procedures, reduce local stress, and extend service life.

[0003] In existing technologies, to ensure the safe operation of thermoplastic composite pipelines in marine, deep well, or large-diameter buried environments, counterweights are needed to overcome buoyancy and achieve free sinking and seabed contact. Existing counterweight methods for subsea pipelines include concrete cladding layers, cast iron fasteners / saddle blocks, etc. These counterweight methods have drawbacks such as complex installation and stress concentration. Therefore, we propose a magnetic powder-coated counterweight structure for thermoplastic composite pipelines to solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a magnetic powder coating counterweight structure for thermoplastic composite pipes, comprising a TCP pipe, an outer TCP sheath layer on the surface of the TCP pipe, a magnetic powder counterweight layer on the surface of the outer TCP sheath layer, a connecting module between the outer TCP sheath layer and the magnetic powder counterweight layer, and a protective module on the surface of the magnetic powder counterweight layer.

[0005] The TCP outer sheath is fitted onto the surface of the TCP tube, and the connection module connects the TCP outer sheath to the magnetic powder counterweight layer.

[0006] Preferably, the connection module includes several sets of connection slots and several sets of connection blocks. The several sets of connection slots are equally spaced on the inner side of the magnetic powder counterweight layer, and the several sets of connection blocks are equally spaced on the outer side of the TCP outer sheath layer.

[0007] Preferably, each set of connecting blocks is formed in a dovetail shape, and the inner wall of each set of connecting grooves is in contact with the surface of a corresponding set of connecting blocks.

[0008] Preferably, the connection module further includes an adhesive layer disposed between the TCP outer sheath layer and the magnetic powder weight layer, with both sides of the adhesive layer respectively bonded to the surfaces of the TCP outer sheath layer and the magnetic powder weight layer.

[0009] Preferably, the protective module is provided with an outer protective sleeve, which is fitted onto the surface of the magnetic powder weight layer.

[0010] Preferably, the protective module further includes several sets of drag-reducing grooves, which are equally spaced on the surface of the outer protective sleeve.

[0011] Preferably, the protective module further includes several sets of anti-crack channels, which are formed inside the magnetic powder weight layer.

[0012] Preferably, each set of anti-crack channels is formed into a hexagonal prism shape, and several sets of anti-crack channels are arranged in a regular honeycomb pattern.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, the TCP tube has an outer TCP sheath layer on its surface, and a magnetic powder weight layer is disposed on the surface of the outer TCP sheath layer. A connecting module is disposed between the outer TCP sheath layer and the magnetic powder weight layer, and a protective module is disposed on the surface of the magnetic powder weight layer. The outer TCP sheath layer is fitted onto the surface of the TCP tube, and the connecting module connects the outer TCP sheath layer and the magnetic powder weight layer. The magnetic powder weight layer can be extruded in one step, avoiding the need for on-site installation and greatly improving installation efficiency. At the same time, the magnetic powder weight layer completely covers the outer TCP sheath layer, increasing the contact area between the outer TCP sheath layer and the magnetic powder weight layer, preventing local contact and stress concentration.

[0015] This invention also includes an outer protective sleeve that protects the magnetic powder weight layer, improving its durability in marine environments and preventing rust, corrosion, and aging in humid conditions, thus extending its service life. The combination of several drag-reducing grooves breaks down large eddies caused by turbulent bursts into smaller ones, trapping high-momentum fluid within the grooves and suppressing the turbulent boundary layer, thereby reducing the frictional resistance of the fluid to the thermoplastic composite pipe. Furthermore, several anti-crack channels work together to geometrically induce crack bifurcation, splitting a dangerous main crack on the surface of the magnetic powder weight layer into multiple smaller cracks with lower energy, thereby reducing the effective stress intensity factor at the crack tip and achieving crack arrest and toughening effects. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a partial structural schematic diagram of the present invention;

[0020] Figure 5 This is a partial structural schematic diagram of the present invention.

[0021] In the diagram: 1. TCP tube; 2. TCP outer sheath layer; 3. Magnetic powder counterweight layer; 4. Connection module; 41. Connection groove; 42. Connection block; 43. Adhesive layer; 5. Protection module; 51. Outer protective sleeve; 52. Drag reduction groove; 53. Crack prevention channel. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely one embodiment of this utility model, and not all embodiments. Based on this embodiment, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Specific embodiments are as follows:

[0023] A magnetic powder-coated counterweight structure for thermoplastic composite pipes, such as Figures 1-5 The system includes a TCP tube 1, a TCP outer sheath layer 2 on the surface of the TCP tube 1, a magnetic powder weight layer 3 on the surface of the TCP outer sheath layer 2, a connecting module 4 between the TCP outer sheath layer 2 and the magnetic powder weight layer 3, and a protective module 5 on the surface of the magnetic powder weight layer 3. The TCP outer sheath layer 2 is fitted onto the surface of the TCP tube 1, and the connecting module 4 connects the TCP outer sheath layer 2 and the magnetic powder weight layer 3. The magnetic powder weight layer 3 can be extruded in one step, avoiding the need for on-site installation and greatly improving installation efficiency. At the same time, the magnetic powder weight layer 3 completely covers the TCP outer sheath layer 2, increasing the contact area between the TCP outer sheath layer 2 and the magnetic powder weight layer 3, preventing local contact between the TCP outer sheath layer 2 and the magnetic powder weight layer 3, thus preventing stress concentration.

[0024] The connection module 4 includes several sets of connection slots 41 and several sets of connection blocks 42. The several sets of connection slots 41 are equally spaced inside the magnetic powder counterweight layer 3, and the several sets of connection blocks 42 are equally spaced outside the TCP outer sheath layer 2. In use, a magnetic powder counterweight layer 3 that matches the diameter of the TCP outer sheath layer 2 is selected, and the magnetic powder counterweight layer 3 is placed horizontally at one end of the TCP tube 1. Each set of connection slots 41 is aligned with the corresponding set of connection blocks 42. The magnetic powder counterweight layer 3 is pushed so that it is fitted onto the surface of the TCP outer sheath layer 2. The counterweight of the magnetic powder counterweight layer 3 enables the TCP tube 1 to overcome buoyancy and sink freely to fit the seabed, thus ensuring safer service in marine, deep well, or large-diameter buried environments.

[0025] Each set of connecting blocks 42 is formed in a dovetail shape, and the inner wall of each set of connecting grooves 41 is in contact with the surface of a corresponding set of connecting blocks 42. The cooperation between the connecting grooves 41 and the connecting blocks 42 can lock the magnetic powder counterweight layer 3, preventing the magnetic powder counterweight layer 3 from rotating during installation, improving the torsional resistance of the magnetic powder counterweight layer 3. At the same time, the connecting grooves 41 and the connecting blocks 42 do not increase the wall thickness of the TCP outer sheath layer 2 and the magnetic powder counterweight layer 3, thus ensuring that the volume of the thermoplastic composite pipe remains unchanged.

[0026] The connecting module 4 also includes an adhesive layer 43, which is disposed between the TCP outer sheath layer 2 and the magnetic powder counterweight layer 3. The two sides of the adhesive layer 43 are respectively attached to the surfaces of the TCP outer sheath layer 2 and the magnetic powder counterweight layer 3. The adhesive layer 43 can be selected from thermoplastic resin or compatible primer that is compatible with the TCP outer sheath layer 2. This achieves the effect of improving the fusion degree of the melt interface and the peel strength. By using the adhesive layer 43 to weld the TCP outer sheath layer 2 and the magnetic powder counterweight layer 3 into one piece, cracking can be prevented and manufacturing efficiency can be improved.

[0027] The protective module 5 is provided with an outer protective sleeve 51, which is fitted onto the surface of the magnetic powder counterweight layer 3. The outer protective sleeve 51 protects the magnetic powder counterweight layer 3, improves the durability of the magnetic powder counterweight layer 3 in the marine environment, and prevents the magnetic powder counterweight layer 3 from rusting, corroding, aging and other problems in the humid environment, thereby improving the service life of the magnetic powder counterweight layer 3.

[0028] The protection module 5 also includes several sets of drag-reducing grooves 52, which are equally spaced on the surface of the outer protective sleeve 51. Through the cooperation of several sets of drag-reducing grooves 52, the large eddies of turbulent bursts can be cut into small eddies, and the high momentum fluid can be locked inside the drag-reducing grooves 52, thereby suppressing the turbulent boundary layer and reducing the frictional resistance of the fluid to the thermoplastic composite pipe.

[0029] The protective module 5 also includes several sets of crack prevention channels 53, which are located inside the magnetic powder counterweight layer 3. The several sets of crack prevention channels 53 work together to split a dangerous main crack on the surface of the magnetic powder counterweight layer 3 into multiple smaller cracks with lower energy through geometrically induced crack bifurcation, thereby reducing the effective stress intensity factor at the crack tip and thus playing the role of crack arrest and toughening.

[0030] Each set of anti-crack channels 53 is formed into a hexagonal prism shape, and several sets of anti-crack channels 53 are arranged in a regular honeycomb pattern. The bends of several sets of anti-crack channels 53 arranged in a honeycomb pattern force the crack to turn and branch multiple times, breaking a main crack into multiple smaller cracks with lower energy, which greatly improves the fracture toughness of the magnetic powder weight layer 3.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic powder-coated counterweight structure for thermoplastic composite pipes, characterized in that: The device includes a TCP tube (1), the surface of which is provided with a TCP outer sheath layer (2), the surface of which is provided with a magnetic powder counterweight layer (3), a connection module (4) is provided between the TCP outer sheath layer (2) and the magnetic powder counterweight layer (3), and a protection module (5) is provided on the surface of the magnetic powder counterweight layer (3). The TCP outer sheath layer (2) is sleeved on the surface of the TCP tube (1), and the connection module (4) connects the TCP outer sheath layer (2) to the magnetic powder counterweight layer (3).

2. The magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 1, characterized in that: The connection module (4) includes several sets of connection slots (41) and several sets of connection blocks (42). The several sets of connection slots (41) are equally spaced on the inner side of the magnetic powder counterweight layer (3), and the several sets of connection blocks (42) are equally spaced on the outer side of the TCP outer sheath layer (2).

3. The magnetic powder coating counterweight structure for thermoplastic composite pipes according to claim 2, characterized in that: Each of the connecting blocks (42) is formed in a dovetail shape, and the inner wall of each of the connecting grooves (41) is in contact with the surface of a corresponding connecting block (42).

4. The magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 2, characterized in that: The connection module (4) also includes an adhesive layer (43), which is disposed between the TCP outer sheath layer (2) and the magnetic powder counterweight layer (3). The two sides of the surface of the adhesive layer (43) are respectively attached to the surfaces of the TCP outer sheath layer (2) and the magnetic powder counterweight layer (3).

5. The magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 1, characterized in that: The protective module (5) is provided with an outer protective sleeve (51), which is fitted onto the surface of the magnetic powder counterweight layer (3).

6. The magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 5, characterized in that: The protective module (5) also includes several sets of drag-reducing grooves (52), which are equally spaced on the surface of the outer protective sleeve (51).

7. A magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 5, characterized in that: The protective module (5) also includes several sets of anti-crack channels (53), which are located inside the magnetic powder counterweight layer (3).

8. A magnetic powder-coated counterweight structure for thermoplastic composite pipes according to claim 7, characterized in that: Each set of anti-crack channels (53) is formed into a hexagonal prism shape, and several sets of anti-crack channels (53) are arranged in a regular honeycomb pattern.

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