Anti-disengagement bending limiter for pipe cable
By installing the connecting clip between the half-watt of the bending limiter and using buffer pads, the problem of connection failure of the existing bending limiter is solved, the connection strength and installation accuracy are improved, and the stability and safety of long-term use are ensured.
Patent Information
- Application Number
- CN202422205247.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-09
AI Technical Summary
When existing bending limiters are bent, the stress at the bolt connection position is too high, which can easily lead to connection failure and lose the bending protection effect.
By installing the connecting clip between the left and right half of the bending limiter, the connection strength between the half-watts is increased, and a buffer pad is installed outside to reduce stress concentration.
The connection strength and installation position accuracy of the bending limiter are improved, ensuring the safety and stability of the connecting half-watt structure during long-term use.
Smart Images
Figure CN223039605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of submarine cables, in particular to a bending limiter for pipe cables that prevents disconnection. Background Art
[0002] As an important medium for energy and power transmission, marine pipe cables are widely used. A large number of submarine pipelines support the transportation of offshore oil, and cables promote the transmission of energy. Their safety and reliability during use are crucial. After the flexible pipe cables are laid, over time, factors such as crustal movement and seabed settlement will cause certain damage. In particular, excessive bending may cause the pipe cables to break. Generally, a bending limiter composed of two half-watts recommended by API specifications is installed at the bending position to protect the pipe cables from excessive bending. The bending limiter will play a certain role in limiting bending, allowing the pipe cables to bend freely within the tolerable bending radius and extending the service life. The bending limiter is mostly made by pouring polyurethane material, and then the two halves are bolted together to form a complete column. However, the contact surface between the bolt connection position and the polyurethane material is very small. When the pipe cable bends, the force between the two half-watts is large, which easily causes excessive stress at the bolt contact position, resulting in the connection failure of the limiter and the loss of the bending protection effect. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a bending limiter for pipe cables that prevents disconnection, which can improve the connection strength between the left limiter half-watt and the right limiter half-watt through a connection card, and has better position accuracy after installation, solving the problem that ordinary ones easily cause excessive stress at the bolt contact position.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A bending limiter for pipe cables that prevents disconnection, comprising a left limiter half-watt, a right limiter half-watt, a connection card and a connection bolt. Both the left limiter half-watt and the right limiter half-watt include an intermediate ring platform. The top of the intermediate ring platform is provided with a connection lip platform through a connection neck. Positioning grooves are opened at adjacent positions on the front and back sides of the intermediate ring platform. A first installation hole communicating with each other is opened in the positioning groove. The connection card is fixed on the positioning groove by passing a first connection bolt through the first installation hole and locking it with a first nut.
[0005] Further, a limit card slot is opened on the inner side wall of the bottom of the intermediate ring platform, and the shape of the limit card slot can be matched with the upper end shape of the connection lip platform.
[0006] Further, it further includes a second connection bolt. Bolt installation holes are opened on the intermediate ring platform, and the second connection bolt passes through the bolt installation hole and is locked with a second nut.
[0007] Further, it further includes an upper buffer pad and a lower buffer pad. A first positioning stud body is fixed on the lower surface of the upper buffer pad, and a second positioning stud body is fixed on the upper surface of the lower buffer pad. Positioning stud holes for interference connection with the first positioning stud body and the second positioning stud body are formed on the upper surface and the lower surface of the connecting lip platform.
[0008] Further, the connecting member includes a body and positioning reinforcing ribs. The positioning reinforcing ribs are fixed on the inner side of the body, and second mounting holes through which the first connecting bolt can pass are formed at the upper and lower ends of the body.
[0009] Further, the shape of the body is C-shaped.
[0010] Further, the openings for the cable in the connecting neck and the connecting lip platform are openings that gradually expand outward with the bottom facing upward.
[0011] Further, the upper and lower surfaces of the tabletop of the connecting lip platform have tapers.
[0012] The beneficial effects of the present utility model are as follows: On the premise of ensuring that the two connecting half-watts have the same form and reducing the manufacturing difficulty, the connecting members are installed on the side, so that the connection strength between the two groups of half-watts is improved, and the position accuracy after installation is better. After the whole is installed outside the cable, when subjected to bending force, the overall structure exerts the strength of the material, there will be no local large stress, the force transmission is uniform, the safety of the connecting half-watt structure can be guaranteed, and it is stable and reliable for long-term use. Description of the Drawings
[0013] Figure 1 is the explosion diagram of the present utility model;
[0014] Figure 2 is the structural diagram of the present utility model;
[0015] Figure 3 is the structural diagram of the left limiter half-watt and the right limiter half-watt of the present utility model;
[0016] Figure 4 is the structural diagram of the combination of multiple groups of left limiter half-watts and right limiter half-watts of the present utility model;
[0017] Figure 5 is the structural diagram of the body of the present utility model;
[0018] Figure 6 is the structural diagram of the upper buffer pad and the lower buffer pad of the present utility model.
[0019] Wherein: 1. Left limiter half tile; 11. Connecting lip platform; 12. Positioning stud hole; 13. Bolt mounting hole; 14. Intermediate ring platform; 15. First mounting hole; 16. Positioning groove; 17. Limit card slot; 18. Connecting neck, 2. Connecting card; 21. Card body; 22. Positioning reinforcing rib; 23. Second mounting hole; 3. First connecting bolt; 41. Upper buffer pad; 42. First positioning stud body; 51. Lower buffer pad; 52. Second positioning stud body, 6. Right limiter half tile, 7. Second connecting bolt. Detailed implementation manner
[0020] The present utility model will be further described below with reference to the accompanying drawings. For better understanding, the orientation of the present utility model is described according to the orientation shown in the drawings, and it should not be construed as a limitation to this application; the following terms "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying relative importance.
[0021] Please refer to Figures 1 to 6 , the present utility model provides an embodiment: a bending limiter for anti-disconnection of pipe cables, including a left limiter half tile 1, a right limiter half tile 6, a connecting card 2 and a connecting bolt. Both the left limiter half tile 1 and the right limiter half tile 6 include an intermediate ring platform 14. The top of the intermediate ring platform 14 is provided with a connecting lip platform 11 through a connecting neck 18. Positioning grooves 16 are opened at adjacent positions on the front and back sides of the intermediate ring platform 14. A first mounting hole 15 communicating with each other is opened in the positioning groove 16. The connecting card 2 is fixed on the positioning groove 16 by the first connecting bolt 3 passing through the first mounting hole 15 and locking with a first nut. The left limiter half tile 1 and the right limiter half tile 6 installed oppositely are combined into a set by the first connecting bolt 3 and wrapped outside the protected pipe cable. The first connecting bolt 3 meets the requirements of anti-corrosion and load, and can be a stainless steel or a high-strength fastener with a coating.
[0022] Please continue to refer to Figure 3 and Figure 4 As shown in, in an embodiment of the present utility model, a limit card slot 17 is opened on the inner side wall of the bottom of the intermediate ring platform 14, and the shape of the limit card slot 17 can be matched with the upper end shape of the connecting lip platform 11. Multiple groups of left limiter half tiles 1 and right limiter half tiles 6 can be provided. There are large and small heads between multiple groups. The large head has a limit card slot 17 inside, and the small head end has a connecting lip platform 11, forming a combined extension that is sleeved with each other to reach the required protection length. The gap between the connecting lip platform 11 and the limit card slot 17 is designed to determine the maximum radius of bending protection.
[0023] Please continue to refer to Figures 1 to 3As shown in the figure, in an embodiment of the present utility model, it further includes a second connecting bolt 7. Bolt mounting holes 13 are formed in the middle ring platform 14. The second connecting bolt 7 passes through the bolt mounting holes 13 and is locked with a second nut. The left limiter half tile 1 and the right limiter half tile 6 mounted in a surrounding manner are fastened after passing through the bolt mounting holes 13 by the second connecting bolt 7, forming an integral body and sleeving around the outside of the cable. The bolt mounting holes 13 are in the form of counterbores, ensuring that the second connecting bolt 7 does not protrude outside after being installed and fastened.
[0024] Please continue to refer to Figure 1 and Figure 5 As shown in the figure, in an embodiment of the present utility model, it further includes an upper buffer pad 41 and a lower buffer pad 51. A first positioning stud body 42 is fixed on the lower surface of the upper buffer pad 41, and a second positioning stud body 52 is fixed on the upper surface of the lower buffer pad 51. Positioning stud holes for interference connection with the first positioning stud body 42 and the second positioning stud body 52 are formed on the upper surface and the lower surface of the connecting lip platform. By adopting a split half tile structure to surround the outside of the cable, and by embedding flexible upper buffer pad 41 and lower buffer pad 51 with a certain thickness between the connecting lip platform 11 and the card slot of the left limiter half tile 1 and the right limiter half tile 6, the upper buffer pad 41 and the lower buffer pad 51 are polyurethane elastic buffer ring pads, enabling the bending limiter units to be locked firmly with each other and provided with flexible pads, which can limit the cable from over-bending and prevent them from hitting each other during back-and-forth swinging. At the same time, there is a buffer within the back-and-forth swinging gap between the two units in the card slot, preventing the limiters from repeatedly hard contacting and wearing, and reducing the contact stress between the limiter units.
[0025] Please continue to refer to Figure 1 and Figure 5 As shown in the figure, in an embodiment of the present utility model, the connecting card member 2 includes a card body 21 and a positioning reinforcing rib 22. The positioning reinforcing rib 22 is fixed on the inner side of the card body 21. Second mounting holes 23 through which the first connecting bolt 3 can pass are formed at the upper and lower ends of the card body 21. There is a recessed positioning groove 16 on the outer wall of the middle ring platform 14 at a lower position, which is a T-shaped embedded groove, meeting the requirement for the card body 21 to be inserted. When the card body 21 is inserted, the positioning reinforcing rib 22 and the upper and lower platforms of the card body 21 are inserted into the positioning groove 16, forming the positioning and connection of the left limiter half tile 1 and the right limiter half tile 6. First mounting holes 15 corresponding to the second mounting holes 23 are formed at both ends of the positioning groove 16, meeting the requirement for the first connecting bolt 3 to pass through and be installed and fastened to prevent the card body 21 from slipping out laterally.
[0026] Please continue to refer to Figure 6 As shown in the figure, in an embodiment of the present utility model, the shape of the card body 21 is C-shaped. The overall shape of the card body 21 is a C-shaped groove, which is a structural member with a certain width in a C shape cast by a polyurethane plastic body using a mold. The material itself has high strength, high hardness, good toughness, and corrosion resistance.
[0027] Please continue to refer to Figure 3 As shown, in an embodiment of the present utility model, the opening through which the cable in the connecting neck 18 and the connecting lip platform 11 passes is an opening that gradually expands outward with the bottom facing upward. The lower part of the connecting lip platform 11 is integrally connected to the connecting neck 18, which has an upwardly expanding hole inside and a cylindrical surface outside, and is integrally formed with the left limiter half tile 1 and the right limiter half tile 6 at the lower end.
[0028] Please continue to refer to Figures 1 to 3 As shown, in an embodiment of the present utility model, the upper and lower surfaces of the tabletop of the connecting lip platform 11 have a taper. This is beneficial for clamping and installation guidance and alignment, and at the same time nests with the groove in the middle ring platform 14, and the bending limit radius control is achieved through the gap and this taper.
[0029] The present utility model has the following working principle: According to information such as the outer diameter of the cable to be protected and limited in bending, the bending radius requirement, the structural single weight, and hydrology, the dimensions of each part of the limiter half tile are comprehensively determined. The upper buffer pad and the lower buffer pad are installed corresponding to the upper and lower parts of the connecting lip platform of the limiter half tile. By aligning the positioning column body of the lower buffer pad from below the connecting lip platform of the limiter half tile to the positioning column hole and clamping it, due to the designed interference of the column, the two can be clamped together without an adhesive to form an integral body. Similarly, the upper buffer pad is aligned from above the connecting lip platform to the positioning column hole and clamped to form an integral body. All the left limiter half tiles, right limiter half tiles are connected and installed with the upper buffer pad and the lower buffer pad in the same operation to form all the half tile monomers with buffer pads.
[0030] The left limiter half tile and the right limiter half tile are continuously nested and installed. The connecting lip platform of the first group is embedded into the limit slot under the middle ring platform of the second group, and the orientation of the inner lip platform is determined according to the requirements to form a half tile-shaped strip that meets the length requirement. The cable to be installed with the bending limiter is moved to the construction ship deck so that the cable falls into the groove of the assembled half tile-shaped strip. Then, the upper assembled limiter half tile assembly is installed correspondingly, and the connecting lip platform is continuously and advancedly placed and installed in front. After that, the second connecting bolt passes through the bolt installation holes on both sides of the limiter half tile to form a ring barrel sleeved outside the cable.
[0031] Align the assembled left limiter half tile and right limiter half tile vertically. After adjustment, insert the clamping body into the positioning grooves on both sides so that the positioning reinforcing rib is stuck in the positioning groove. Correct the positions of the upper and lower paired left limiter half tiles and right limiter half tiles. Then, insert the second connecting bolt through the second mounting hole and out through the corresponding first mounting hole in the positioning groove on the middle ring platform to the other end of the clamping body, and pre-tighten the mounting nut. Adjust the left limiter half tile, right limiter half tile and connecting clamping parts, and tighten all the second connecting bolts at this position to the required torque to complete the installation of a single component. Repeat the same operation to complete the installation of all limiters. Then, connect other accessories as required, and send the limiter and connecting parts, etc. to the final pipeline installation position in the water to complete the construction. Due to the enhanced connection effect of the connecting clamping parts, the connection between the upper and lower installed limiter half tiles is more reliable, meeting the requirements of long-term dynamic alternating loads underwater, ensuring that the internal pipeline will not bend excessively, and being stable and safe in place. The suspended submarine cable sways under the action of water flow together with the bending protection device. Since the upper elastic buffer pad and lower buffer pad can buffer well, the connecting lip platform and the limit slot of the upper and lower convex platforms are fitted with the left limiter half tile and right limiter half tile in contact. When the limiter half tile bends, the connecting lip platform presses the upper buffer pad, and when it bends in the other direction, it presses the lower buffer pad, avoiding direct collision due to the gap, achieving the effect of shock absorption and buffering, improving the anti-fatigue performance of the protection device, and realizing long-term safety.
[0032] The above are only the preferred embodiments of the present utility model, and should not be construed as limiting the present application. Any equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.
Claims
1. A bending limiter for pipes and cables to prevent disengagement, characterized in that: It includes a left limiter half-shell, a right limiter half-shell, a connecting clip and a connecting bolt. The left limiter half-shell and the right limiter half-shell both include an intermediate ring platform. A connecting lip platform is provided on the top of the intermediate ring platform through a connecting neck. Positioning grooves are provided at adjacent positions on the front and rear sides of the intermediate ring platform. A first interconnected mounting hole is provided in the positioning groove. A first connecting bolt passes through the first mounting hole in the positioning groove and is locked with a first nut to fix the connecting clip on the positioning groove.
2. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: The inner side wall of the bottom of the intermediate ring platform is provided with a limit slot, and the shape of the limit slot can match the shape of the upper end of the connecting lip platform.
3. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: It also includes a second connecting bolt. The intermediate ring platform is provided with a bolt mounting hole. The second connecting bolt passes through the bolt mounting hole and is locked with a second nut.
4. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: It also includes an upper buffer pad and a lower buffer pad, wherein a first positioning column body is fixed to the lower surface of the upper buffer pad, and a second positioning column body is fixed to the upper surface of the lower buffer pad, and positioning column holes which are interference-connected with the first positioning column body and the second positioning column body are opened on the upper and lower surfaces of the connecting lip platform.
5. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: The connecting card comprises a card body and a positioning reinforcement rib, wherein the positioning reinforcement rib is fixed on the inner side of the card body, and the upper and lower ends of the card body are provided with second mounting holes through which the first connecting bolt can pass.
6. The anti-detachment bending limiter for pipe and cable according to claim 5, characterized in that: The card body is in a C shape.
7. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: The openings in the connection neck and the connection lip through which the pipes and cables pass are openings whose bottoms gradually expand upward.
8. The anti-detachment bending limiter for pipe and cable according to claim 1, characterized in that: The table surface connected to the lip table has tapers at the top and bottom.