Arc-shaped submarine cable bending limiter
By designing a submarine cable bending limiter with a wheel-shaped connecting section and an arc-shaped groove, the fatigue failure and stress concentration problems at the connection between the submarine cable and the underwater equipment are solved, achieving higher structural safety and rigidity.
Patent Information
- Application Number
- CN202422614960.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The connection between the submarine cable and the underwater equipment is prone to fatigue failure, and the connection section on one side of the existing bend limiter is small, which makes it easy for stress concentration to cause damage.
A circular arc-shaped submarine cable bending limiter is designed, which includes a first and second wheel-shaped connecting section and a cylindrical middle section. The length of the connecting section is increased and the contact area is enlarged by the design of arc grooves and transition holes. Multiple limiting units are used to connect to improve the overall stiffness.
Effectively prevent fatigue failure at the connection between submarine cables and underwater equipment, reduce stress concentration, improve structural safety and rigidity, and extend service life.
Smart Images
Figure CN223472024U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to submarine cable protection device technical field especially relates to a circular arc submarine cable bending limiter. BACKGROUND
[0002] With the increasing development of marine wind power, oil platform, people pay more and more attention to the protection of submarine cable and other flexible hose. In the use of submarine cable, its end part all want to connect with rigid member, but because submarine cable uses in the underwater dynamic working environment, the connection place of submarine cable and underwater equipment often appears the phenomenon of excessive bending, and the possibility of fatigue failure of the connection place is relatively high, causes the serious damage to the use performance of submarine cable, leads to the occurrence of the accident. The bending limiter widely used at present is two semicircle cast body combination into a circular combination, the middle is hollow structure for placing cable and line pipe to play the protection role, such as the bending limiter shown in Figure 1 The area of the connecting section of one side is small, stress concentration easily occurs in use, leading to the damage of the bending limiter. UTILITY MODEL CONTENT
[0003] The utility model discloses a circular arc submarine cable bending limiter, which can solve the problem of fatigue failure of the connection place of submarine cable and underwater equipment, and the problem of stress concentration easily occurring in the connecting section of one side of the bending limiter in use, leading to the damage of the bending limiter.
[0004] Therefore, the utility model adopts the following technical scheme:
[0005] A circular arc submarine cable bending limiter comprises one or more than one limiting unit, the limiting unit comprises a first connecting section, a second connecting section and an intermediate section, the first connecting section and the second connecting section are wheel-shaped, the intermediate section is cylindrical, the diameters of the first connecting section, the intermediate section and the second connecting section gradually increase, the first connecting section and the intermediate section are internally provided with a cable through hole capable of accommodating submarine cable, the second connecting section is internally provided with an arc-shaped groove capable of accommodating submarine cable and the first connecting section, the cable through hole and the arc-shaped groove are communicated and both are communicated with the outside, and the length of the first connecting section is greater than the length of the intermediate section.
[0006] On the basis of the above technical scheme, the utility model can also adopt the following further technical scheme, or use these further technical schemes in combination:
[0007] Each limiting unit is composed of two limiting plate blocks.
[0008] The two limiting plate blocks are symmetrically arranged about the central axis of the submarine cable.
[0009] The first connecting section and the intermediate section are further provided with an extension section, and the second connecting section is provided with a transition through hole capable of being put into the extension section.
[0010] One side of the transition through hole is adjacent to and communicates with the arc-shaped groove, and the other side of the transition through hole communicates with the outside, the transition through hole is an outwardly expanding hole, and the hole diameter of the transition through hole gradually increases from the side of the arc-shaped groove to the side of the outside.
[0011] The first connecting section is provided with a first inwardly rounded corner on the side away from the intermediate section, and the first inwardly rounded corner is connected with the cable through hole.
[0012] The second connecting section is provided with a second inwardly rounded corner on the side away from the intermediate section, and the second inwardly rounded corner is connected with the transition through hole.
[0013] The intersection of the arc-shaped groove and the transition through hole is provided with a third rounded corner.
[0014] The connecting surfaces of the two limiting plate blocks are respectively provided with a plurality of positioning columns and a plurality of positioning grooves corresponding to the plurality of positioning columns.
[0015] The wall surface of the second connecting section on the side away from the intermediate section is an inclined wall surface, and the wall surface is inclined toward the side of the arc-shaped groove.
[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects: the problem that fatigue failure easily occurs at the connection part of the submarine cable and the underwater equipment is solved, the length of the first connecting section is increased, the arc-shaped groove 32 in the first connecting section and the second connecting section is designed as a wheel shape, the contact area of the two is increased, the overall rigidity of the two or more limiting units connected in sequence is enhanced, and the number of the limiting units required is less. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a sectional view of the prior art.
[0018] Figure 2 It is a structure schematic view of the two limiting units connected in the utility model.
[0019] Figure 3 It is a sectional view of the two limiting units connected in the utility model.
[0020] Figure 4 It is an explosion structure schematic view of the limiting unit in the utility model.
[0021] Figure 5 It is a sectional view of the limiting unit in the utility model.
[0022] Figure 6The utility model discloses Figure 5 The enlarged view of the middle B. Specific implementation
[0023] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the preferred implementation scheme of the utility model is described below in combination with specific embodiments, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar functions throughout the drawings, but it should be understood that the drawings are only for illustrative description and cannot be understood as limiting the utility model; in order to better illustrate the embodiments, some components in the drawings can be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted, and the positional relationship described in the drawings is only for illustrative description and cannot be understood as limiting the utility model.
[0024] The utility model is further described below in combination with the drawings and embodiments, but not as the basis for limiting the utility model.
[0025] The utility model provides a kind of arc-shaped submarine cable bending limiter, including more than one restriction unit, and the restriction unit includes first connecting section 1, second connecting section 3 and intermediate section 2, first connecting section 1 and second connecting section 3 are wheel-shaped, and intermediate section 2 is cylindrical, the diameter of first connecting section 1, intermediate section 2, second connecting section 3 gradually increases, and the inside of first connecting section 1 and intermediate section 2 is provided with cable through-hole 13 capable of being placed into submarine cable, the inside of second connecting section 2 is provided with arc-shaped groove 32 capable of being placed into submarine cable and first connecting section 1, cable through-hole 13 is communicated with arc-shaped groove 32 and both are communicated with outside, and the length of first connecting section 1 is greater than the length of intermediate section 2.
[0026] The wheel shape in the embodiment is actually the shape remaining after cutting off the opposite two end faces of a spherical shape.
[0027] The diameter of arc-shaped groove 32 is greater than or equal to the diameter of first connecting section 1, and in the embodiment, the diameter of arc-shaped groove 32 is the same as the diameter of first connecting section 1, and the two can be tightly fitted, and the diameter of cable through-hole 13 is slightly larger than the diameter of submarine cable, which reduces the difficulty of placing submarine cable during installation and is also conducive to the reasonable bending and deformation of submarine cable.
[0028] The required number of restriction units can be set according to actual conditions.
[0029] Each restriction unit is composed of two restriction plate blocks 10, so as to facilitate the placement of submarine cable.
[0030] The two restriction plate blocks 10 are symmetrically arranged about the central axis of submarine cable.
[0031] The first connecting section 1 and the intermediate section 2 are further provided with an extension section 14, and the second connecting section 3 is provided with a transition through hole 35 capable of being put into the extension section 14.
[0032] One side of the transition through hole 35 is adjacent to and communicates with the arc-shaped groove 32, and the other side of the transition through hole 35 communicates with the outside. The transition through hole 35 is an expanding hole, and the hole diameter of the transition through hole 35 gradually increases from one side of the arc-shaped groove 32 to the other side. In this way, the collision between the extension section 14 and the transition through hole 35 during use can be avoided, and at the maximum bending, the extension section 14 is parallel to and in contact with the transition through hole 35, so that the stress on the head connecting section can be reduced, the breakage of the head connecting section can be prevented, and the safety of the structure can be improved.
[0033] The first connecting section 1 is provided with a first inwardly chamfered corner 12 away from the intermediate section 2, and the first chamfered corner 12 is connected with the cable through hole 13.
[0034] The second connecting section 3 is provided with a second inwardly chamfered corner 34 away from the intermediate section 2, and the second chamfered corner 34 is connected with the transition through hole 35.
[0035] The intersection of the arc-shaped groove 32 and the transition through hole 35 is provided with a third chamfered corner 36.
[0036] In the embodiment, the first chamfered corner 12, the second chamfered corner 34 and the third chamfered corner 36 can avoid collision damage during transportation and installation.
[0037] The connecting surfaces of the two limiting plate blocks 10 are respectively provided with a plurality of positioning columns 23 and a plurality of positioning grooves 24 corresponding to the positioning columns 23.
[0038] In the embodiment, the positioning columns 23 and the positioning grooves 24 are respectively integrally machined with the limiting plate blocks 10, so that the positioning and fitting are convenient and fast during installation. When installing the two or more limiting units, the limiting plate blocks 10 on the same side of the submarine cable are combined, that is, the first connecting section 1 of one of the limiting plate blocks 10 is sequentially put into the arc-shaped groove 32 of the adjacent limiting plate block 10, then the limiting plate blocks 10 on the other side of the submarine cable are assembled according to the positioning columns 23 and the positioning grooves 24, and finally the two symmetrical limiting plate blocks 10 are fixed by using bolts.
[0039] The wall surface 33 of the second connecting section 3 away from the intermediate section 2 is an inclined wall surface, and the wall surface 33 is inclined toward the side of the arc-shaped groove 32, so that collision damage with the straight wall 22 shown in FIGS. 1 to 3 during use can be prevented, and the wall surface 33 is fitted with the straight wall 22 at the maximum bending, the area of the contact position is increased, the stress concentration phenomenon is avoided, and the overall rigidity and safety of the structure are improved. Figure 3 and Figure 5 The wall surface 33 of the second connecting section 3 away from the intermediate section 2 is an inclined wall surface, and the wall surface 33 is inclined toward the side of the arc-shaped groove 32, so that collision damage with the straight wall 22 shown in FIGS. 1 to 3 during use can be prevented, and the wall surface 33 is fitted with the straight wall 22 at the maximum bending, the area of the contact position is increased, the stress concentration phenomenon is avoided, and the overall rigidity and safety of the structure are improved.
[0040] Lubricating material can be added to the outer wall of the first connecting section 1 and the arc-shaped groove 32, thereby reducing the wear caused by the mutual friction of the contact surfaces during use, and also making rotation easier.
[0041] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use the utility model of a circular arc-shaped submarine cable bending limiter, and the positive effects described in the utility model can be achieved.
[0042] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification and claims of the utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "mounting", "setting", "provided with", "connected", "connected", "sleeved" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two mechanisms, elements or components. Those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.
[0043] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "one end", "the other end", "outer side", "inner side", "horizontal", "end", "length", "outer end", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated mechanism or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second" are only used for simplicity in description, and do not indicate or imply relative importance.
[0044] In addition, in the practice of the claims of the utility model, those skilled in the art can understand and affect the changes of the disclosed embodiments through the study of the drawings, disclosure and attached claims. In addition, the words "including", "containing" and the like in the claims and the specification do not exclude other elements or steps, and the singular noun does not exclude its plural form.
[0045] The above is only a preferred embodiment of the utility model, and is not intended to limit the scope of the utility model, i.e. any equivalent changes and modifications made according to the utility model are covered by the scope of the claims of the utility model, which will not be listed one by one here.
Claims
1. A circular arc-shaped submarine cable bend limiter comprising one or more limiting units, each of the limiting units comprising a first connecting section (1), a second connecting section (3) and an intermediate section (2), the first connecting section (1) and the second connecting section (3) being wheel-shaped, the intermediate section (2) being cylindrical, the diameters of the first connecting section (1), the intermediate section (2) and the second connecting section (3) gradually increasing, the first connecting section (1) and the intermediate section (2) being internally provided with a cable through hole (13) capable of accommodating a submarine cable, the second connecting section (3) being internally provided with an arc-shaped groove (32) capable of accommodating the submarine cable and the first connecting section (1), the cable through hole (13) and the arc-shaped groove (32) being in communication and both being in communication with the outside, the length of the first connecting section (1) being greater than the length of the intermediate section (2).
2. A bend limiter for a circularly arcuate undersea cable as defined in claim 1, wherein, Each of the limiting units is composed of two limiting plate blocks (10) spliced together.
3. A bend limiter for a circularly arcuate undersea cable as defined in claim 2, wherein, The two limiting plate blocks (10) are symmetrically arranged about the central axis of the submarine cable.
4. A bend limiter for a circularly arcuate undersea cable as defined in claim 1, wherein, An extension section (14) is further arranged between the first connecting section (1) and the intermediate section (2), and the second connecting section (3) is provided with a transition through hole (35) capable of accommodating the extension section (14) on the side away from the intermediate section (2).
5. A bend limiter for a circularly arcuate undersea cable as defined in claim 4, wherein, One side of the transition through hole (35) is adjacent to and in communication with the arc-shaped groove (32), the other side of the transition through hole (35) is in communication with the outside, the transition through hole (35) is an outwardly expanding hole, and the hole diameter of the transition through hole (35) gradually increases from the side of the arc-shaped groove (32) to the side of the outside.
6. A bend limiter for a circularly arcuate undersea cable as defined in claim 1, wherein, The side of the first connecting section (1) away from the intermediate section (2) is provided with an inward first fillet (12), and the first fillet (12) is connected to the cable through hole (13).
7. A bend limiter for a circularly arcuate undersea cable as defined in claim 4, wherein, The side of the second connecting section (3) away from the intermediate section (2) is provided with an inward second fillet (34), and the second fillet (34) is connected to the transition through hole (35).
8. A bend limiter for a circularly arcuate undersea cable as defined in claim 4, wherein, A third fillet (36) is arranged at the joint of the arc-shaped groove (32) and the transition through hole (35).
9. A bend limiter for a circularly arcuate undersea cable as defined in claim 2, wherein, A plurality of positioning columns (23) and a plurality of positioning grooves (24) corresponding to the positioning columns (23) are respectively arranged on the connecting surfaces of the two limiting plate blocks (10).
10. A bend limiter for a circularly arcuate undersea cable as defined in claim 1, wherein, The wall surface (33) of the second connecting section (3) away from the intermediate section (2) is an inclined wall surface, and the wall surface (33) is inclined toward the side of the arc-shaped groove (32).