Cable semi-flexible kink preventer

Abstract

The cable semi-flexible anti-bending device is characterized in that an inner drum-shaped sleeve is tightly attached to a cable, an inner layer steel sleeve is tightly wrapped outside the outer surface of the cable and the inner drum-shaped sleeve, and the two ends of the inner layer steel sleeve are clamped by a first pipe clamp; an outer drum-shaped sleeve is sleeved outside the outer surface of the inner layer steel sleeve, and the position of the outer drum-shaped sleeve corresponds to the inner and outer positions of the inner drum-shaped sleeve; a middle layer steel sleeve is tightly wrapped outside the outer surface of the inner layer steel sleeve and the outer drum-shaped sleeve, and the two ends of the middle layer steel sleeve are clamped by a second pipe clamp; an outer layer steel sleeve is tightly wrapped outside the outer surface of the middle layer steel sleeve, and the two ends of the outer layer steel sleeve are clamped by a third pipe clamp; and a clamp is clamped outside the outer surface of the outer layer steel sleeve. The cable semi-flexible anti-bending device can provide a connecting and positioning point for cable dragging or suspension, improve the strength of the cable, and prolong the service life of the cable.

Description

Technical Field

[0001] This invention relates to a cable auxiliary device for marine geophysical exploration, specifically to a semi-flexible cable anti-bending device. Background Technology

[0002] In offshore seismic exploration, when the source vessel is towed, cables are arranged in parallel in the water, requiring fixed-distance connections between them. The upper ends of the cables need to be connected to buoys, and rigid connections are often used. Although the strength of the connection points is easily met, excessive compressive stress at the cable joints can easily damage the cables. When flexible cables come into contact with rigid connection points, the bending radius of the cable changes significantly at the contact end, making the cable more susceptible to damage and reducing its lifespan. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a semi-flexible anti-bending device for cables, which can provide connection and positioning points for cable dragging or suspension, improve cable strength, and extend cable service life.

[0004] This invention relates to a semi-flexible cable anti-bending device, comprising an inner drum-shaped sleeve, an outer drum-shaped sleeve, an inner steel wire sleeve, a middle steel wire sleeve, an outer steel wire sleeve, a clamp, a first pipe clamp, a second pipe clamp, and a third pipe clamp. The inner drum-shaped sleeve is formed by two interlocking first semi-ring bodies, has a cylindrical inner hole, and its outer surface is drum-shaped. Two first positioning holes are radially arranged in the middle of the inner drum-shaped sleeve, and the two first positioning holes are vertically aligned. The outer drum-shaped sleeve is formed by two interlocking second semi-ring bodies, has a drum-shaped inner hole, and its outer surface is drum-shaped. Two second positioning holes are radially arranged in the middle of the outer drum-shaped sleeve, and the two second positioning holes are vertically aligned. The inner, middle, and outer steel wire sleeves are all formed by spirally winding multiple steel wires. The inner and outer steel wire sleeves have the same spiral direction, while the middle steel wire sleeve has the opposite spiral direction to the inner and outer steel wire sleeves. The lengths of the inner, middle, and outer steel wire sleeves decrease sequentially. The clamp consists of two semi-circular clamps that interlock. The inner hole of the clamp includes a central drum-shaped hole and cylindrical holes at both ends. A ring-shaped groove is provided on the outer surface of the central part of the clamp. The inner cylindrical surface of the inner drum-shaped sleeve is tightly fitted to the cable. The inner steel wire sleeve tightly wraps around the cable and the outer surface of the inner drum-shaped sleeve, and its two ends are secured by the first pipe clamp. The inner drum-shaped sleeve is located in the axial center of the inner steel wire sleeve, and the outer drum-shaped sleeve is fitted onto the outer surface of the inner steel wire sleeve. The position corresponds to the inner and outer bulging sleeves. The middle layer of steel wire sleeve tightly wraps around the outer surfaces of the inner layer of steel wire sleeve and the outer bulging sleeve, and its two ends are clamped by the second pipe clamp. The outer layer of steel wire sleeve tightly wraps around the outer surface of the middle layer of steel wire sleeve, and its two ends are clamped by the third pipe clamp. The clamp is clamped on the outer surface of the outer layer of steel wire sleeve. The middle part of the clamp corresponds to the inner and outer bulging sleeves. The inner hole axis of the clamp, the inner cylindrical hole axis of the inner bulging sleeve, and the inner hole axis of the outer bulging sleeve coincide.

[0005] The present invention relates to a semi-flexible anti-bending cable device, wherein the second positioning hole is coaxially arranged with the first positioning hole.

[0006] The present invention relates to a semi-flexible anti-bending cable device, wherein two first semi-ring bodies are axially aligned and fastened together through two first positioning holes.

[0007] The present invention relates to a semi-flexible anti-bending cable device, wherein two second semi-ring bodies are axially aligned and fastened together through two second positioning holes.

[0008] The present invention relates to a semi-flexible anti-bending cable device, wherein the diameters of the inner steel wire sheath, the middle steel wire sheath, and the outer steel wire sheath increase sequentially.

[0009] The present invention relates to a semi-flexible anti-bending cable device, wherein the outer bulging sleeve and the inner bulging sleeve are axially aligned through the second positioning hole and the first positioning hole.

[0010] The present invention relates to a semi-flexible cable anti-bending device, wherein the outer surface of the clamp has multiple symmetrically arranged bolt mounting holes on both sides of the annular groove, and the two semi-clamps are fastened by bolts.

[0011] The present invention relates to a semi-flexible cable anti-bending device, wherein the first, second, and third pipe clamps are all annular structures with openings, and bolts pass through and lock the openings on both sides.

[0012] The semi-flexible anti-bending device for cables in this invention differs from existing technologies in that it comprises an inner steel wire sheath, a middle steel wire sheath, and an outer steel wire sheath, all constructed from multiple steel wires spirally wound together. This spiral winding allows the inner, middle, and outer steel wire sheaths to clamp the cable layer by layer, thus tightly wrapping the cable and preventing it from shifting along the cable. This reduces stress on the cable and increases its strength. Simultaneously, the installation of the inner and outer bulging sheaths alters the outer diameter of the steel wire layers, allowing for... The steel wire layer forms a drum shape, providing axial positioning for the semi-hoop. The outer surface of the middle part of the clamp has a ring groove, which can provide connection and positioning points for cable dragging or suspension. The length of the inner steel wire sleeve, the middle steel wire sleeve, and the outer steel wire sleeve decreases layer by layer. This not only increases the bending radius in the middle of the anti-bending device, but also gradually reduces the bending radius towards the bending radius of the cable itself from the middle to the end of the anti-bending device. This makes the anti-bending device a semi-flexible structure that combines rigidity and flexibility, avoiding cable bending damage caused by excessively rapid changes in bending radius and extending the service life of the cable.

[0013] The semi-flexible cable anti-bending device of the present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the semi-flexible anti-bending cable device of the present invention;

[0015] Figure 2 This is a half-sectional schematic diagram of the semi-flexible anti-bending cable device of the present invention;

[0016] Figure 3 This is a front view of the outer bulging sleeve in the semi-flexible cable anti-bending device of the present invention, wherein only half of the outer bulging sleeve is shown;

[0017] Figure 4 for Figure 3 Top view;

[0018] Figure 5 for Figure 3 The left view;

[0019] Figure 6 This is a front view of the inner drum-shaped sleeve in the semi-flexible cable anti-bending device of the present invention, wherein only half of the inner drum-shaped sleeve is shown;

[0020] Figure 7 for Figure 6 Top view;

[0021] Figure 8 for Figure 6 The left view;

[0022] Figure 9 This is a front view of the semi-hoop in the semi-flexible cable anti-bending device of the present invention;

[0023] Figure 10 for Figure 9 Top view;

[0024] Figure 11 for Figure 9 The left view. Detailed Implementation

[0025] like Figure 1 and Figure 2 As shown, the semi-flexible anti-bending cable device of the present invention includes an inner drum-shaped sleeve 1, an outer drum-shaped sleeve 2, an inner steel wire sleeve 3, a middle steel wire sleeve 4, an outer steel wire sleeve 5, a clamp 6, a first pipe clamp 7, a second pipe clamp 8, and a third pipe clamp 9.

[0026] Combination Figure 1 , 2 As shown in 6-8, the inner drum-shaped sleeve 1 is formed by two first semi-ring bodies 11 fastening together. The inner drum-shaped sleeve 1 has a cylindrical inner hole 13 and an outer surface of the inner drum-shaped sleeve 1 that is drum-shaped. Two first positioning holes 12 are arranged radially in the middle of the inner drum-shaped sleeve 1. The two first positioning holes 12 are vertically aligned. The two first semi-ring bodies 11 are axially aligned and fastened together through the two first positioning holes 12 to form the inner drum-shaped sleeve 1.

[0027] Combination Figure 1 , 2As shown in Figure 3-5, the outer drum-shaped sleeve 2 is formed by two second semi-ring bodies 21 fastening together. The outer drum-shaped sleeve 2 has a drum-shaped inner hole 23, and the outer surface of the outer drum-shaped sleeve 2 is a drum-shaped surface. A second positioning hole 22 is radially arranged in the middle of the outer drum-shaped sleeve 2. The two second positioning holes 22 are vertically aligned. The two second semi-ring bodies 21 are axially aligned and fastened together through the two second positioning holes 22 to form the outer drum-shaped sleeve 2. The second positioning hole 22 is coaxially arranged with the first positioning hole 12.

[0028] like Figure 2 As shown, the outer drum-shaped sleeve 2 and the inner drum-shaped sleeve 1 are axially aligned through the second positioning hole 22 and the first positioning hole 12.

[0029] like Figure 1 , 2 As shown, the inner wire sleeve 3, the middle wire sleeve 4, and the outer wire sleeve 5 are all made of multiple steel wires spirally wound together. The inner wire sleeve 3 and the outer wire sleeve 5 have the same spiral direction, while the middle wire sleeve 4 has the opposite spiral direction to the inner and outer wire sleeves. The lengths of the inner wire sleeve 3, the middle wire sleeve 4, and the outer wire sleeve 5 decrease sequentially, and the diameters of the inner wire sleeve 3, the middle wire sleeve 4, and the outer wire sleeve 5 increase sequentially.

[0030] Combination Figure 1 , 2 As shown in Figures 9-11, the clamp 6 is formed by two semi-annular half-clamps 61 fastened together. The inner hole 64 of the clamp 6 includes a drum-shaped hole 641 in the middle and cylindrical holes 642 at both ends of the drum-shaped hole. The outer surface of the middle part of the clamp 6 is provided with an annular groove 62, which is used to connect the hanger or tow device. The outer surface of the clamp 6, on both sides of the annular groove 62, is provided with a plurality of symmetrically arranged bolt mounting holes 63. The two half-clamps 61 are fastened by bolts 10.

[0031] like Figure 1 As shown in Figure 2, the inner cylindrical inner hole of the inner drum sleeve 1 is tightly attached to the cable 1'. The inner steel wire sleeve 3 is tightly wrapped around the outer surface of the cable 1' and the inner drum sleeve 1, and its two ends are clamped by the first pipe clamp 7. The inner drum sleeve 1 is located in the axial middle of the inner steel wire sleeve 3. The outer drum sleeve 2 is sleeved on the outer surface of the inner steel wire sleeve 3, and the position of the outer drum sleeve 2 corresponds to the inner and outer sides of the inner drum sleeve 1. The middle steel wire sleeve 4 is tightly wrapped around the outer surface of the inner steel wire sleeve 3 and the outer drum sleeve 2, and its two ends are clamped by the second pipe clamp 8. The outer steel wire sleeve 5 is tightly wrapped around the outer surface of the middle steel wire sleeve 4, and its two ends are clamped by the third pipe clamp 9. The clamp 6 is clamped on the outer surface of the outer steel wire sleeve 5. The middle part of the clamp 6 corresponds to the inner and outer sides of the outer drum sleeve 2. The axis of the inner hole of the clamp 6, the axis of the inner cylindrical inner hole of the inner drum sleeve 1, and the axis of the inner hole of the outer drum sleeve 2 coincide.

[0032] like Figure 1 , 2As shown, the first pipe clamp 7, the second pipe clamp 8, and the third pipe clamp 9 are all ring structures with openings, and bolts pass through and lock them on both sides of the openings.

[0033] like Figure 2 As shown, in manufacturing the semi-flexible anti-bending device for cables of the present invention, firstly, the two first semi-ring bodies 11 are axially aligned and fastened together through the two first positioning holes 12 to form an inner drum-shaped sleeve 1, with the inner cylindrical surface of the inner drum-shaped sleeve 1 tightly attached to the cable 1'; multiple steel wires of the inner steel wire sleeve 3 are spirally wound around the outer surface of the cable 1' and the inner drum-shaped sleeve 1, with the ends of the steel wires aligned and both ends fastened by the first tube clamps 7, and the inner drum-shaped sleeve 1 located in the axial middle of the inner steel wire sleeve 3; secondly, the two second semi-ring bodies 21 of the outer drum-shaped sleeve 2 are axially aligned and fastened to the outer surface of the inner steel wire sleeve 3, with the inner drum-shaped surface of the outer drum-shaped sleeve 2 tightly attached to the bulging part of the inner steel wire sleeve 3, and the outer drum... The inner drum sleeve 2 and the outer drum sleeve 1 are aligned axially along the middle through their respective second positioning holes 22 and first positioning holes 12. Next, multiple steel wires of the middle layer steel wire sleeve 4 are spirally wound around the outer surfaces of the inner layer steel wire sleeve 3 and the outer drum sleeve 2, with the ends of the steel wires aligned and the two ends clamped by the second pipe clamp 8. Multiple steel wires of the outer layer steel wire sleeve 5 are spirally wound around the outer surface of the middle layer steel wire sleeve 4, with the ends of the steel wires aligned and the two ends clamped by the third pipe clamp 9. Finally, the two half-hoops 61 are fastened to the outer surface of the outer layer steel wire sleeve 5 and secured with bolts, so that the drum-shaped hole wall of the inner hole of the clamp 6 is pressed against the bulging part of the outer layer steel wire sleeve and aligned axially along the middle with the outer drum sleeve 2.

[0034] This invention relates to a semi-flexible cable anti-bending device. The clamp has a ring-shaped groove on its outer surface in the middle. During use, a hanger or tow device can be connected to this groove, providing a connection and positioning point for cable dragging or suspension. The device uses spiral steel wire to clamp the cable in stages, tightly wrapping the cable and preventing it from shifting along the cable. This reduces stress on the cable and increases its strength. The installation of the inner and outer drum-shaped sleeves alters the outer diameter of the steel wire layer, forming a drum shape and providing axial positioning for the two halves of the clamp. The length of the steel wire layer decreases layer by layer from the inside out, increasing the bending radius in the middle of the anti-bending device and gradually decreasing it towards the cable's bending radius from the middle to the end. This creates a semi-flexible structure that combines rigidity and flexibility, preventing cable bending damage caused by rapid changes in the bending radius and extending the cable's service life.

[0035] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A semi-flexible anti-bending device for cables, characterized in that: It includes an inner bulging sleeve (1), an outer bulging sleeve (2), an inner steel wire sleeve (3), an intermediate steel wire sleeve (4), an outer steel wire sleeve (5), a clamp (6), a first pipe clamp (7), a second pipe clamp (8), and a third pipe clamp (9); The inner drum-shaped sleeve (1) is formed by two first semi-ring bodies (11) fastening together. The inner drum-shaped sleeve (1) has a cylindrical inner hole. The outer surface of the inner drum-shaped sleeve (1) is a drum-shaped surface. Two first positioning holes (12) are arranged radially in the middle of the inner drum-shaped sleeve (1). The two first positioning holes (12) correspond to each other vertically. The outer drum-shaped sleeve (2) is formed by two second half-ring bodies (21) fastened together. The outer drum-shaped sleeve (2) has a drum-shaped inner hole. The outer surface of the outer drum-shaped sleeve (2) is a drum-shaped surface. The second positioning hole (22) is arranged radially in the middle of the outer drum-shaped sleeve (2). The two second positioning holes (22) correspond to each other vertically. The inner wire sleeve (3), the middle wire sleeve (4), and the outer wire sleeve (5) are all made of multiple wires spirally wound together. The inner wire sleeve (3) and the outer wire sleeve (5) have the same spiral direction, while the middle wire sleeve (4) has the opposite spiral direction to the inner and outer wire sleeves. The lengths of the inner wire sleeve (3), the middle wire sleeve (4), and the outer wire sleeve (5) are successively shortened. The clamp (6) is formed by two semi-circular half clamps (61) fastening together. The inner hole of the clamp (6) includes a drum-shaped hole in the middle and cylindrical holes at both ends of the drum-shaped hole. A ring groove (62) is provided on the outer surface of the middle part of the clamp (6). The inner cylindrical hole of the inner drum sleeve (1) is tightly attached to the cable (1'). The inner steel wire sleeve (3) is tightly wrapped around the outer surface of the cable (1') and the inner drum sleeve (1), and its two ends are clamped by the first pipe clamp (7). The inner drum sleeve (1) is located in the axial middle of the inner steel wire sleeve (3). The outer drum sleeve (2) is sleeved on the outer surface of the inner steel wire sleeve (3), and the position of the outer drum sleeve (2) corresponds to the inner and outer sides of the inner drum sleeve (1). The middle layer steel wire sleeve (4) is tightly wrapped around the inner layer steel wire sleeve. (3) and the outer surface of the outer bulging sleeve (2) and its two ends are clamped by the second pipe clamp (8). The outer steel wire sleeve (5) is tightly wrapped around the outer surface of the middle steel wire sleeve (4) and its two ends are clamped by the third pipe clamp (9). The clamp (6) is clamped on the outer surface of the outer steel wire sleeve (5). The middle part of the clamp (6) corresponds to the inner and outer of the outer bulging sleeve (2). The inner hole axis of the clamp (6), the axis of the cylindrical inner hole of the inner bulging sleeve (1), and the inner hole axis of the outer bulging sleeve (2) coincide. The diameters of the inner wire sleeve (3), the middle wire sleeve (4), and the outer wire sleeve (5) increase sequentially; the outer bulging sleeve (2) and the inner bulging sleeve (1) are axially aligned through the second positioning hole (22) and the first positioning hole (12); the outer surface of the clamp (6) is provided with multiple symmetrically arranged bolt mounting holes (63) on both sides of the annular groove (62), and the two half clamps (61) are fastened by bolts; the first pipe clamp (7), the second pipe clamp (8), and the third pipe clamp (9) are all annular structures with openings, and bolts pass through both sides of the openings for locking.

2. The semi-flexible cable anti-bending device according to claim 1, characterized in that: The second positioning hole (22) is coaxially arranged with the first positioning hole (12).

3. The semi-flexible cable anti-bending device according to claim 2, characterized in that: The two first semi-ring bodies (11) are axially aligned and fastened together through the two first positioning holes (12).

4. The semi-flexible cable anti-bending device according to claim 3, characterized in that: The two second half-rings (21) are axially aligned and fastened together through the two second positioning holes (22).

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