Anti-sliding buoyancy sheath for submarine dynamic pipe cable
By designing an anti-slip buoyancy sheath of subsea dynamic pipe cable with ring clamps and wings, the slippage and torque damage caused by platform deviation in the mud-contact section is solved, and stable protection of the pipe cable and extended use cycle are achieved.
Patent Information
- Application Number
- CN202422137825.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-02
AI Technical Summary
When the existing dynamic subsea pipe cable is not buried in the mud-contact section, the platform offset causes violent movement of the subsea cable, which is prone to slip, twisting, wear and breakage, resulting in failure of the dynamic pipeline cable.
A subsea dynamic pipe cable anti-slip buoyancy sheath is designed, including an outer shell made of the upper shell and the lower shell, with an arc groove and an annular clamp inside. The annular clamp is arranged on the outer periphery of the pipe cable, the inner surface of the clamp is closely contacted with the pipe cable, and is fixed to the seabed through the wing plate to eliminate lateral torsion damage.
Effectively protect dynamic pipe cables, prevent slippage and torque damage, extend the service cycle, and do not increase the downward bending force on the pipe cables, ensuring the stability and reliability of the pipe cables.
Smart Images
Figure CN223007313U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of submarine dynamic cable protection devices, and particularly relates to an anti-slip buoyancy sheath for submarine dynamic cables. Background Art
[0002] Submarine dynamic cables are used to connect surface floating platforms and underwater structures, providing power, transmitting communication signals, and transporting materials such as oil and gas for floating platforms. They are one of the cores of deep-sea floating wind power and oil and gas development. At present, the line type of dynamic cables mainly presses the cable body into an "S" or "W" line type through buoyancy blocks or counterweight blocks. This line type can meet the large-range offset of floating platforms, relieve the axial tension on the submarine cable body at the same time, and ensure the minimum bending radius.
[0003] However, at the unburied position of the mud-touching section, the offset of the platform will cause violent movement of the dynamic cable at the seabed part. The laid cement blocks in this part are prone to slipping. In severe cases, the cable body will be twisted or even worn and broken, resulting in the failure of the dynamic cable. Summary of the Utility Model
[0004] In order to solve the problem that in the existing submarine dynamic cable technology, the stability of the cable during operation cannot be guaranteed, which easily leads to the damage and failure of the dynamic cable, the utility model provides an anti-slip buoyancy sheath for submarine dynamic cables, which can effectively protect the dynamic cable and extend the service life of the dynamic cable.
[0005] The technical solution of the utility model is as follows:
[0006] An anti-slip buoyancy sheath for submarine dynamic cables includes an outer shell body formed by splicing an upper shell body and a lower shell body. An arc-shaped groove is provided inside the outer shell body, and an annular clamp is arranged in the arc-shaped groove. The annular clamp is sleeved on the outer periphery of the cable, and the inner surface of the annular clamp is in close contact with the cable. A plurality of protruding wing plates are arranged on the outer periphery of the outer shell body.
[0007] Preferably, the annular clamp includes a pair of semi-circular clamping jaws, and the pair of clamping jaws are respectively embedded in the inner walls of the upper shell body and the lower shell body.
[0008] Preferably, a plurality of protruding longitudinal anti-slip rings are arranged on the inner wall of the clamping jaw.
[0009] Preferably, threaded connection holes are provided at both ends of the clamping jaw, and the pair of clamping jaws are fixedly connected by bolts.
[0010] Preferably, the arc-shaped groove is located in the middle of the outer shell body.
[0011] Preferably, the wing plates are arc-shaped along the axial direction of the cable.
[0012] Preferably, the wing plates are evenly arranged along the radial direction of the outer shell body.
[0013] Preferably, both ends of the upper housing and the lower housing have reduced openings, and the upper housing and the lower housing are spliced and fixedly connected by tightening the reduced openings with an annular hoop.
[0014] Preferably, the outer housing is olive-shaped.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] (1) A buoyancy sheath for anti-slip of a subsea dynamic pipe cable designed by the utility model forms an integral connection and fixation by installing an outer housing with an annular clamp on the pipe cable, and the installation groove inside the outer housing clamps the annular clamp. The annular clamp has a longitudinal anti-slip ring, which can form a stable connection and fixation point on the pipe cable. The upper housing and the lower housing are fixedly connected by tightening the reduced openings with a hoop, and it cannot move along the axial direction of the dynamic pipe cable but can rotate around the metal chuck when the lateral force reaches a certain degree, eliminating the lateral torsion damage of the dynamic cable.
[0017] (2) In the overall structure of the utility model, the buoyancy in water exceeds the self-weight, and it will not increase the downward bending force on the dynamic pipe cable.
[0018] (3) In the embodiment of the utility model, by setting the wing plates, when the dynamic pipe cable on the seabed surface swings laterally, the swing amplitude of the lateral outer housing can be restricted because the wing plates are stuck to the seabed; when there is longitudinal movement, due to the arc structure of the wing plates themselves, local over-bending of the dynamic pipe cable will not occur, and it is stable and reliable for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0020] Figure 2 It is a schematic diagram of the structure of the chuck;
[0021] Figure 3 It is a schematic diagram of the structure of the outer housing;
[0022] Figure 4 It is a schematic diagram of the interior of the outer housing and the annular hoop;
[0023] In the figure: 1 - outer housing, 2 - pipe cable, 3 - upper housing, 4 - lower housing, 5 - annular clamp, 51 - chuck, 52 - threaded connection hole, 53 - longitudinal anti-slip ring, 6 - reduced opening, 7 - wing plate, 8 - annular hoop. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] The following will describe the present utility model in detail with reference to the accompanying drawings and specific embodiments.
[0025] See Figures 1-3, a dynamic submarine pipeline anti-slip buoyancy sheath, comprising an outer shell 1 formed by splicing an upper shell 3 and a lower shell 4. The inner part of the outer shell 1 has an arc-shaped groove, and an annular fixture 5 is arranged in the arc-shaped groove. The annular fixture 5 is sleeved on the outer periphery of the pipeline, and the inner surface of the annular fixture 5 is in close contact with the pipeline 2. The outer periphery of the outer shell 1 has a number of protruding wing plates 7.
[0026] See Figure 2 , in an embodiment of the present invention, the annular fixture 5 includes a pair of semi-circular clamping jaws 51, and the pair of clamping jaws 51 are respectively embedded on the inner walls of the upper shell 3 and the lower shell 4.
[0027] See Figure 2 , on the basis of the previous embodiment, a number of protruding longitudinal anti-slip rings 53 are arranged on the inner wall of the clamping jaw 51, and the pipeline 2 is tightened through the longitudinal anti-slip rings 53;
[0028] See Figure 2 , specifically, threaded connection holes 52 are arranged at both ends of the clamping jaw 51, and the pair of clamping jaws 51 are fixedly connected by bolts. Bolts, nuts, etc. are all made of stainless steel, and can be in the form of external hexagons or internal hexagons. The specific dimensions are selected according to the standard specifications of the designed length, or steel bolts with a Teflon coating can also be used.
[0029] In an embodiment of the present invention, the arc-shaped groove is located in the middle of the outer shell 1.
[0030] See Figure 1 and Figure 3 , in an embodiment of the present invention, the wing plate 7 is arc-shaped along the axial direction of the pipeline. When the pipeline 2 has longitudinal movement, due to the arc shape of the wing plate, the longitudinal displacement of the pipeline 2 can be restricted, and local bending of the pipeline 2 will not occur, and it is stable and reliable for long-term use.
[0031] See Figure 1 and Figure 3 , in an embodiment of the present invention, the wing plates 7 are uniformly arranged along the radial direction of the outer shell.
[0032] See Figure 3 , in an embodiment of the present invention, both ends of the upper shell 3 and the lower shell 4 have reduced openings 3, and the upper shell 3 and the lower shell 4 are spliced and fixedly connected by tightening the reduced openings with an annular hoop 8.
[0033] See Figure 1 , in an embodiment of the present invention, the outer shell 1 is olive-shaped.
[0034] The implementation manner of the present invention is as follows:
[0035] Step 1: According to the protection requirements of the bending force and hydrodynamic analysis of the submarine dynamic pipeline cable in the area to be protected, combined with the strength and hardness of the buoyancy material, complete the structural design of the anti-slip buoyancy sheath, determine the dimensions of the upper shell 3 and the lower shell 4, determine the annular clamp 5 and select the fastening bolt assembly that meets the requirements, and determine the specification form of the annular hoop 8; use polyurethane or nylon to manufacture the outer shell by mold opening, and fill the inside with foamed high-hardness floating materials to form the upper shell 3 and the lower shell 4. Use stainless steel to process the inner clamp, and transport it to the construction site after completing the inspection of the parts.
[0036] Step 2: On the deck of the construction ship, slip a pair of jaws 51 around the outside of the pipeline cable 2, install the fastening bolt assembly in the threaded connection hole 52, combine the pair of jaws 51 into the annular clamp 5, and tighten the fastening bolt assembly so that the longitudinal anti-slip ring of the annular protrusion inside the jaws 51 tightly clamps the pipeline cable 2, realizing the fastening of the pipeline cable and providing a connection point that can cooperate with the subsequent installation and alignment of the upper shell 3 and the lower shell 4.
[0037] Step 3: Align the upper shell 3 and the lower shell 4 according to the annular clamp 5 that has been installed. Slip the upper shell 3 and the lower shell 4 around the annular clamp 5, and install the annular hoop 8 at the constricted openings at both ends to fix the upper shell 3 and the lower shell 4 into the outer shell 1. At this time, the outer shell 1 is sleeved on the outer periphery of the annular clamp 5. Similarly, complete the installation at other positions (multiple sheaths can be installed on the pipeline cable); the annular clamp 5 cannot move axially along the pipeline cable 2, but can drive the pipeline cable 2 to rotate when the lateral force reaches a certain level, eliminating the lateral torsional damage of the dynamic cable. The buoyancy of the annular clamp and the outer shell in water exceeds their own weight, and will not increase the downward bending force on the dynamic pipeline cable; when the pipeline cable 2 swings laterally on the seabed surface, the wing plate 7 catches the seabed, and the outer shell 1 will rotate slightly, effectively restricting the lateral swing amplitude of the pipeline cable 2. When the pipeline cable 2 moves longitudinally, through the arc structure of the wing plate 7, the wing plate 7 can move back and forth along the axial direction of the pipeline cable 2, and greatly reduce the distance of the forward and backward movement, without local over-bending of the dynamic pipeline cable, ensuring safety.
[0038] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.
Claims
1. A submarine dynamic cable anti-slip buoyancy sheath, characterized in that: It comprises an outer shell body formed by splicing an upper shell body and a lower shell body, wherein the inner part of the outer shell body is provided with an arc groove, the arc groove is provided with an annular fixture, the annular fixture is sleeved on the outer periphery of the pipe cable, the inner surface of the annular fixture is in close contact with the pipe cable, and the outer periphery of the outer shell body is provided with a plurality of raised wing plates.
2. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The annular clamp comprises a pair of semicircular slips, which are respectively embedded on the inner walls of the upper shell and the lower shell.
3. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 2, characterized in that: A plurality of longitudinal anti-slip rings in a convex shape are arranged on the inner wall of the slip.
4. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 3, characterized in that: Threaded connection holes are provided at two ends of the slips, and a pair of slips are fixedly connected by bolts.
5. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The arc groove is located in the middle of the outer shell.
6. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The wing plate is arc-shaped along the axial direction of the tube cable.
7. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The wing plates are evenly arranged along the radial direction of the outer shell.
8. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The upper shell and the lower shell have constrictions at both ends, and the upper shell and the lower shell are spliced and fixedly connected by locking the constrictions with an annular clamp.
9. The anti-slip buoyancy sheath for submarine dynamic cable according to claim 1, characterized in that: The outer shell is olive-shaped.