一种海底管道离底拖法安装的防磨损拖曳装置
By introducing a shock-absorbing mechanism and a floating bed design into the off-bottom towing installation device for subsea pipelines, the fatigue failure problem of traditional devices under dynamic loads and corrosive environments has been solved, achieving higher installation safety and reduced frictional resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN TIMEAST OFFSHORE ENG
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional off-bottom towing installation methods for submarine pipelines lack comprehensive consideration of dynamic loads and corrosive environments, making the connection points weak points and prone to fatigue failure.
The design incorporates a shock-absorbing mechanism combined with a floating bed, including a bending bracket, roller assembly, and buffer springs. Through multi-directional hinges and buoyancy design, it absorbs the impact of tugboats and reduces alternating loads and stress concentration at pipe connections.
It effectively alleviates fatigue failure at pipe connections, improves installation safety and stability, and reduces frictional resistance and energy consumption.
Smart Images
Figure CN224516129U_ABST
Abstract
Claims
1. An abrasion protection tow device for installation of a subsea pipeline by the method of bottom pull-off towing, characterised in that: The floating bed (2) is connected to the stern end (1) of the tugboat via a shock-absorbing mechanism (3). The floating bed (2) includes a curved bracket (21) and pontoons (22) symmetrically fixed on both sides of the curved bracket (21) for supporting the curved bracket (21). The front end of the curved bracket (21) is fixedly installed with a clamping assembly (4) for fixing the traction end of the subsea pipeline, and the surface of the curved bracket (21) is fixedly installed with a plurality of roller assemblies (5) distributed along the curved surface for supporting the traction section of the subsea pipeline. The shock absorption mechanism (3) includes four symmetrically arranged shock absorption rods (31), a head hinge seat (32) and a tail hinge seat (33) fixedly connected to both ends of the shock absorption rods (31), a first fisheye shaft (321) hinged to the head hinge seat (32) and connected to the front end of the float (2), a second fisheye shaft (331) hinged to the tail hinge seat (33) and connected to the stern end (1) of the tugboat, and a buffer spring (34) fitted on the outside of the shock absorption rods (31), wherein the two ends of the buffer spring (34) are respectively connected to the first fisheye shaft (321) and the second fisheye shaft (331).
2. An abrasion protection tow arrangement for subsea pipeline installation by the method of bottom pull-off towing according to claim 1, characterized in that: The clamping assembly (4) includes an arc-shaped groove (41) fixedly installed near the front end of the curved bracket (21), a gantry (42) fixedly connected to the arc-shaped groove (41), an arc-shaped chuck (43) that moves longitudinally toward or away from the arc-shaped groove (41), and a clamping cylinder (44) fixedly installed on the gantry (42) and whose movable end is connected to the arc-shaped chuck (43).
3. An abrasion protection tow arrangement for subsea pipeline installation by the method of bottom pull-off towing according to claim 2, characterised in that: The arc-shaped clamp (43) is slidably connected to the gantry (42) on both sides.
4. An abrasion protection tow arrangement for subsea pipeline installation by the method of bottom pull-off towing according to claim 3, characterized in that: Both the arc-shaped bracket (41) and the arc-shaped clamp (43) are fixedly connected with rubber pads (45), and the surface of the rubber pads (45) has wedge-shaped grooves for increasing friction.
5. An abrasion protection tow arrangement for subsea pipeline bottom tow installation according to claim 4, characterized in that: The roller assembly (5) includes a roller frame (51) fixedly mounted on the curved bracket (21), a bottom roller (52) rotatably connected to the center of the roller frame (51), and side rollers (53) symmetrically arranged on both sides of the bottom roller (52) and rotatably connected to the roller frame (51). The axes of the two side rollers (53) are V-shaped.
6. An abrasion protection tow arrangement for subsea pipeline bottom tow installation according to claim 5, characterized in that: The bending bracket (21) is fixedly connected with a number of studs (211) for penetrating the bottom plate of the roller frame (51), and each stud (211) is screwed with a nut (212) for locking.
7. An abrasion protection tow arrangement for subsea pipeline bottom tow installation according to claim 6, characterized in that: The material of the curved bracket (21) is duplex stainless steel.