Force-bearing towing head assembly for armored cable and integration method

Abstract

The invention discloses a force-bearing towing head assembly for an armored cable and an integration method.The force-bearing towing head assembly for the armored cable comprises a cabin body, an inner taper sleeve, a limiting ring, a Haver type conical part and a winding ring assembly, a first end cover is arranged at the rear end of the cabin body, the inner taper sleeve is arranged in the cabin body, the conical surface of the inner taper sleeve points to the first end cover, and a second end cover is arranged at the rear end of the cabin body; the limiting ring and the Haver type conical part are arranged on the outer side of the inner taper sleeve in a sleeving mode, the Haver type conical part is located in front of the limiting ring, N nonmetal fiber armored bearing layers are sequentially arranged in the armored cable from outside to inside, and the winding ring assembly comprises M winding rings which are arranged in the cabin body at intervals in the front-back direction and located on the front side of the inner taper sleeve; through winding of the fiber bundle on the winding ring and weaving or knotting treatment after penetrating through the inner side or the outer side of the limiting ring, the tensioning of the fiber bundle is ensured under the action of the Haver type conical piece, the structure after glue pouring treatment is more stable, the reliability and the stability are improved, and the use requirements of 6000-meter water depth and 1500-KN large tension can be met.

Description

Technical Field

[0001] The present invention relates to the field of load-bearing towing heads for armored cables, and particularly to a load-bearing towing head assembly for armored cables and an integration method thereof. Background Art

[0002] An underwater towing detection system installs various observation instruments onto an underwater or in-water observation platform through an underwater composite towing cable, achieving long-term, continuous, and real-time observation of the ocean, and is widely used in fields such as ocean scientific research, ocean resource exploration, and marine biology research.

[0003] The load-bearing towing head assembly is an important part of the transmission of an underwater towing detection system. On the one hand, it provides power supply for the underwater part of the system, and at the same time, it also undertakes the high-speed transmission of information between the water surface and underwater, and is an important "connection link".

[0004] Currently, the load-bearing towing cables used in ocean towing systems have covered a water depth of 6000 meters. The working environment is harsh, and it is affected by factors such as sea swells and ocean currents. Therefore, higher requirements are put forward for the design and optimization of the load-bearing towing cables.

[0005] In order to reduce the adverse effects of self-weight on the load-bearing towing cable, an armored cable with multiple layers of non-metallic fibers (such as aramid) can be used. Compared with the traditional steel armored cable in terms of the same tensile strength requirements, the weight can be reduced by at least 30% or more.

[0006] In order to meet the requirements of a water depth of 6000 meters for the underwater detection system and a component breaking tensile force of 1500 kN, the armored cable used requires 5 - 6 layers of non-metallic fiber armor, which puts forward higher requirements for the structure and integration method of the load-bearing towing head assembly.

[0007] In the prior art, a patent application with publication number CN 109436253 A discloses a towing head and an assembly method for an underwater towing system, a patent application with publication number CN219393845U discloses a high-efficiency aramid load-bearing connection component, a patent application with publication number CN 206041447 U discloses an armored optoelectronic composite load-bearing towing head, and a patent application with publication number CN118888191B discloses a load-bearing towing head assembly for a hybrid armored composite cable and an integration method thereof. Most of them clamp and fix the armored steel wire or non-metallic fiber through internal and external tapered sleeves. Limited by the structure, the fixation of 5 - 6 layers of armored fibers cannot be carried out, the connection efficiency and tensile strength requirements are relatively low, and it cannot meet the requirements of a water depth of 6000 meters and a large tensile force of 1500 KN. The connection reliability and stability cannot adapt to complex sea conditions. Summary of the Invention

[0008] The main technical problem to be solved by the present invention is to provide a load-bearing towing head assembly and an integration method for armored cables, which can improve the connection construction efficiency, reliability and stability, and meet the use requirements of a water depth of 6000 meters and a large tensile force of 1500 KN.

[0009] To solve the above technical problems, a technical solution adopted by the present invention is: to provide a load-bearing towing head assembly for armored cables, including: a cabin body, an inner conical sleeve, a limiting ring, a split conical member and a wire winding ring assembly. A first end cover is arranged at the rear end of the cabin body. The inner conical sleeve is arranged in the cabin body, and the conical surface points to the first end cover. The limiting ring and the split conical member are sleeved outside the inner conical sleeve, and the split conical member is located in front of the limiting ring. N non-metallic fiber armored load-bearing layers are sequentially arranged from outside to inside in the armored cable. The wire winding ring assembly includes M wire winding rings that are arranged at intervals before and after in the cabin body and are located on the front side of the inner conical sleeve, and M ≤ N. A first support member is connected or directly connected between the front end of the inner conical sleeve and the adjacent wire winding ring, and a second support member is arranged between two adjacent wire winding rings.

[0010] In a preferred embodiment of the present invention, the cabin body and the first end cover adopt an integrated welded structure or a split assembly structure. A first through hole corresponding to the outer wall of the armored cable is arranged in the first end cover. A first threaded hole is arranged at the outer end of the first through hole. A first locking nut is arranged on the first threaded hole. A first conical hole is arranged in the first through hole in front of the first threaded hole. A first conical sealing sleeve is arranged in the first conical hole. A first washer is arranged between the first conical sealing sleeve and the first locking nut.

[0011] In a preferred embodiment of the present invention, a second end cover is arranged at the front end of the cabin body. A first screw for connecting with the cabin body is arranged on the second end cover. A second through hole corresponding to the inner sheath of the armored cable is arranged in the second end cover. A second threaded hole is arranged at the outer end of the second through hole. A second locking nut is arranged on the second threaded hole. A second conical hole is arranged in the second through hole behind the second threaded hole. A second conical sealing sleeve is arranged in the second conical hole. A second washer is arranged between the second conical sealing sleeve and the second locking nut. A sealing ring in contact with the inner wall of the cabin body is arranged on the second end cover.

[0012] In a preferred embodiment of the present invention, a bending limiter mounting hole is arranged on the first end cover, and an equipment mounting hole is arranged on the second end cover.

[0013] In a preferred embodiment of the present invention, the split conical member includes two symmetrically distributed semi-rings and a second screw for fixing the two semi-rings.

[0014] In a preferred embodiment of the present invention, the two adjacent winding rings are connected and fixed by providing a third screw, and the outer diameter of the front winding ring is not less than the outer diameter of the rear winding ring.

[0015] In a preferred embodiment of the present invention, the second support member is a hollow tube, and the third screw passes through the corresponding hollow tube.

[0016] In a preferred embodiment of the present invention, the first support members are distributed in a ring array, and potting glue is provided in the cabin.

[0017] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide an integration method of a load-bearing tractor, comprising the following steps: a. Pass the end of the armored cable through the first locking nut, the first washer, the first conical sealing sleeve and the first through hole of the first end cover in sequence, and expose the end of the armored cable; b. Separating the non-metallic fiber armor bearing layer at the end of the armored cable, the N layers of non-metallic fiber armor bearing layer are divided into the first non-metallic fiber armor bearing layer, the second non-metallic fiber armor bearing layer ... the Nth non-metallic fiber armor bearing layer in order from outside to inside, and the M winding rings are divided into the first winding ring, the second winding ring ... the Mth winding ring in order from back to front; c. First, the non-metallic fibers in the first non-metallic fiber armor bearing layer are scattered and evenly divided into several fiber bundles, and each fiber bundle is wound on the first winding ring for at least one circle, and then extends backward along the outer wall of the inner cone sleeve through the inner side of the limiting ring; d. Then, the non-metallic fibers in the second non-metallic fiber armor bearing layer are scattered and evenly divided into several fiber bundles, and the fiber bundles are respectively wound on the second winding ring or the first winding ring for at least one circle, and then extended backward through the inner side or the outer side of the limiting ring along the outer wall of the inner cone sleeve; e. The inner non-metallic fiber armor bearing layer is processed in sequence according to the above method, and each winding ring is provided for winding of at least one layer of fiber bundles on the non-metallic fiber armor bearing layer; f. The fiber bundles are braided or knotted in groups on the rear side of the limiting ring to achieve pre-stretching of the fiber bundles; g. Install the Haversian cone on the front side of the limit ring and hold all the fiber bundles. Apply pre-tightening force by tightening the second screw to force the limit ring to move backward to ensure the tension of the fiber bundles. h. Pull the armored cable backwards so that the inner conical sleeve retreats into the cabin and abuts against the first end cover, screw the first locking nut into the first threaded hole, and compress the first conical sealing sleeve through the first washer so that the first conical sealing sleeve hugs the outer wall of the armored cable to perform elastic sealing; i. Place the cabin body vertically on the bracket, fix the first end cover located at the bottom of the cabin body through the flange on the bracket, and perform multiple layered glue injection processes through the port on the top of the cabin body; j. Install the second end cover on the cabin body, ensure that the inner sheath of the armored cable passes through the second end cover and extends upward, and install the second locking nut on the second end cover, and compress the second conical sealing sleeve through the second gasket, so that the second conical sealing sleeve hugs the inner sheath of the armored cable to perform elastic sealing.

[0018] In a preferred embodiment of the present invention, at least one fiber bundle on a non-metallic fiber armor bearing layer extends backward from the outer side of the limiting ring, and each group of fiber bundles that are woven or knotted contains fibers from multiple layers of the non-metallic fiber armor bearing layer.

[0019] The beneficial effects of the present invention are as follows: the load-bearing towing head assembly and integration method for armored cables pointed out by the present invention ensure the tension of the fiber bundle under the action of the Haversian cone by winding the fiber bundle on the winding ring and weaving or knotting the fiber bundle after passing through the inner or outer side of the limiting ring. The structure after the glue filling treatment is more stable, and the joint force is exerted during tension, which improves the reliability and stability, can meet the use requirements of 6000 meters water depth and 1500KN large pulling force, and the connection construction is convenient and the work efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a structural schematic diagram of a preferred embodiment of a load-bearing tug assembly for an armored cable of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure after the cabin is removed; Figure 3 It is a structural schematic diagram of a preferred embodiment of a bracket used in a method for integrating a load-bearing tractor of the present invention. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 3, embodiments of the present invention include: Such as Figure 1 And Figure 2 The load-bearing towing head assembly 100 for armored cables shown, which is used for the load-bearing connection of the armored cable 200, includes: a cabin body 110, an inner conical sleeve 190, a limit ring 160, a split conical part 150 and a wire winding ring assembly. A first end cover 120 is arranged at the rear end of the cabin body 110. The cabin body 110 and the first end cover 120 can adopt an integrated welding structure or a split assembly structure. In this embodiment, the cabin body 110 and the first end cover 120 are integrally welded, with a firm structure and good sealing performance.

[0023] A first through hole corresponding to the outer wall of the armored cable 200 is arranged in the first end cover 120, which is convenient for the insertion construction of the armored cable 200. A first threaded hole is arranged at the outer end of the first through hole, and a first locking nut 121 is arranged on the first threaded hole. A first conical hole is arranged in the first through hole in front of the first threaded hole, and a first conical sealing sleeve 123 is arranged in the first conical hole. A first washer 122 is arranged between the first conical sealing sleeve and the first locking nut. After tightening the first locking nut 121, the first conical sealing sleeve 123 is pressed by the first washer 122 to realize the wrapping and sealing of the armored cable 200.

[0024] Such as Figure 1 Shown, the inner conical sleeve 190 is arranged in the cabin body 110, and the conical surface points to the first end cover 120. The limit ring 160 and the split conical part 150 are sleeved outside the inner conical sleeve 190, and the split conical part 150 is located in front of the limit ring 160. In this embodiment, the split conical part 150 includes two symmetrically distributed semi-circular rings 151 and a second screw 152 for fixing the two semi-circular rings, which is convenient for assembly.

[0025] N layers of non-metallic fiber armored load-bearing layers 220 are sequentially arranged from the outside to the inside in the armored cable 200. In this embodiment, 6 layers of aramid armored load-bearing layers are adopted, with high tensile strength. The wire winding ring assembly includes 5 wire winding rings 140 arranged at intervals in the front and rear in the cabin body 110 and located on the front side of the inner conical sleeve. Such as Figure 2 Shown, the outer diameter of the front wire winding ring is larger than that of the rear wire winding ring, forming a pagoda structure. The outer diameter of the frontmost wire winding ring is larger. During the assembly process, the fibers in the innermost 2 layers of non-metallic fiber armored load-bearing layers share a common frontmost wire winding ring, which is beneficial to reducing costs.

[0026] In this embodiment, a first support member 170 is disposed between the front end of the inner cone sleeve 190 and the adjacent winding ring and is connected thereto by welding. The first support members 170 are distributed in an annular array, providing good support for the winding ring without affecting the potting construction. A second support member 180 is disposed between two adjacent winding rings, increasing the distance between the two winding rings 140, which is beneficial to the fixation of the fibers after potting, extending the path of fiber fixation and increasing the contact between the potting adhesive and the fibers.

[0027] To enhance the structural stability, two adjacent winding rings are connected and fixed by a third screw 181. In this embodiment, the second support member 180 is a hollow tube, and the third screw 181 passes through the corresponding hollow tube, realizing the fixation of the second support member 180 with a reliable structure.

[0028] Potting adhesive is provided in the cabin body 110. In this embodiment, resin potting adhesive is used to fix the fiber winding and tensioning, enhancing the structural stability and tensile effect.

[0029] A second end cap 130 is provided at the front end of the cabin body 110. The second end cap 130 is provided with a first screw 136 connected to the cabin body 110, facilitating assembly. A sealing ring 135 in contact with the inner wall of the cabin body 110 is provided on the second end cap 130, providing good sealing effect and preventing water ingress. A second through hole corresponding to the inner sheath 210 of the armored cable 200 is provided in the second end cap 130, facilitating the extension of the inner sheath 210.

[0030] A second threaded hole is provided at the outer end of the second through hole. A second locking nut 131 is provided on the second threaded hole. A second tapered hole is provided in the second through hole behind the second threaded hole. A second tapered sealing sleeve 133 is provided in the second tapered hole. A second washer 132 is provided between the second tapered sealing sleeve 133 and the second locking nut 131. After the second locking nut 131 is tightened, the second tapered sealing sleeve 133 is pressed by the second washer 132 to achieve the wrapping and sealing of the inner sheath 210.

[0031] As Figure 1 shown, a bending limiter mounting hole 124 is provided on the first end cap 120, facilitating the installation and fixation of the bending limiter to limit the bending of the armored cable at the head position. A device mounting hole 134 is provided on the second end cap 130, facilitating the connection with the working device.

[0032] An integrated method for a load-bearing tow head includes the following steps: a. The end of the armored cable 200 is sequentially passed through the first locking nut 121, the first washer 122, the first tapered sealing sleeve 123 and the first through hole of the first end cap 120, and the end of the armored cable 200 is exposed; b. Separating the non-metallic fiber armor bearing layer at the end of the armored cable, the six layers of non-metallic fiber armor bearing layer 220 are divided into the first non-metallic fiber armor bearing layer, the second non-metallic fiber armor bearing layer ... the sixth non-metallic fiber armor bearing layer in order from outside to inside, and the five winding rings are divided into the first winding ring, the second winding ring ... the fifth winding ring in order from back to front; c. First, the non-metallic fibers in the first non-metallic fiber armor bearing layer are scattered and evenly divided into H fiber bundles. After each fiber bundle is wound on the first winding ring for 1.5 turns, it is extended backward through the inner side of the limiting ring 160 along the outer wall of the inner cone sleeve 190. The conical surface in the limiting ring 160 corresponds to the outer wall of the inner cone sleeve 190, so that this part of the fiber bundle can be clamped; d. Install the second winding ring, and then break up the non-metallic fibers in the second non-metallic fiber armor bearing layer and evenly divide them into H fiber bundles (H value is 6-10). After winding the fiber bundles on the second winding ring for 1.5 turns, they are respectively extended backward through the inner or outer side of the limiting ring 160 along the outer wall of the inner cone sleeve 190. After extension, the fiber bundles can be pre-fixed with tape or rubber band to avoid looseness; e. Figure 2 As shown, the inner non-metallic fiber armor bearing layer is processed in sequence according to the above method, and the fifth winding ring is used for winding the fiber bundles on the fifth non-metallic fiber armor bearing layer and the sixth non-metallic fiber armor bearing layer, which is conducive to simplifying the structure, reducing the volume of the cabin 110, and reducing the cost; f. The fiber bundles are braided or knotted in H groups to achieve pre-stretching of the fiber bundles. In this embodiment, the fiber bundles can be braided like braids to form H braid structures. Each group of braided or knotted fiber bundles contains 6 layers of fibers in the non-metallic fiber armor bearing layer, and the force is evenly distributed; At least one fiber bundle on the non-metallic fiber armor bearing layer extends backward from the outside of the limiting ring, ensuring that the fibers in the six layers of non-metallic fiber armor bearing layers are woven at the rear side of the limiting ring and are limited by the limiting ring 160, which is conducive to tensioning the fibers through the limiting ring 160; g. Install the Haversian cone 150 on the front side of the limiting ring and hold all the fiber bundles. Apply pre-tightening force by tightening the second screw to force the limiting ring 160 to move backwards, ensure the tension of the fiber bundles, and avoid the fiber bundles wound on the winding ring from being in a loose state, which is conducive to joint force during tensioning; h. Pull the armored cable 200 backwards, so that the inner cone sleeve 190 retreats into the cabin 110 and abuts against the first end cover 120, screw the first locking nut 121 into the first threaded hole, and press the first cone sealing sleeve 123 through the first gasket 122, so that the first cone sealing sleeve 123 hugs the outer wall of the armored cable 200 to perform elastic sealing to avoid leakage during glue injection; i. As shown in Figure 3 , place the cabin body 110 vertically on the bracket 300, and fix the first end cover 120 at the bottom of the cabin body at this time through the flange 310 on the bracket 300. Keep the cabin body 110 vertical, and perform multiple layered glue filling treatments through the port at the top of the cabin body 110. After curing, fix the fibers. In this embodiment, the bearing tow head can withstand a breaking tensile force value of up to 2000 kN after glue filling; j. Install the second end cover 130 on the cabin body, ensure that the inner sheath of the armored cable 200 penetrates through the second end cover 130 and extends upward, and install the second locking nut 131 on the second end cover 130. Press the second conical sealing sleeve 133 through the second washer 132, so that the second conical sealing sleeve 133 tightly holds the inner sheath 210 of the armored cable 200 for elastic sealing and improves the waterproof effect.

[0033] In summary, a bearing tow head assembly and an integration method for an armored cable pointed out by the present invention are applicable to armored cables with multiple non-metallic fiber armored bearing layers, are convenient to assemble, improve the connection reliability, and can meet the underwater towing use requirements of large water depths and large tensile forces.

[0034] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An armored cable load-bearing towing head assembly for the load-bearing connection of armored cables, characterized in that, Comprising: A cabin body, an inner conical sleeve, a limiting ring, a split conical part and a winding ring assembly. A first end cover is arranged at the rear end of the cabin body. The inner conical sleeve is arranged in the cabin body with its conical surface pointing to the first end cover. The limiting ring and the split conical part are sleeved outside the inner conical sleeve, and the split conical part is located in front of the limiting ring. N non-metallic fiber armored load-bearing layers are sequentially arranged from outside to inside in the armored cable. The winding ring assembly includes M winding rings that are arranged at intervals in the front and rear in the cabin body and are located on the front side of the inner conical sleeve, and M≤N. A first support member is connected or directly connected between the front end of the inner conical sleeve and the adjacent winding ring, and a second support member is arranged between adjacent two winding rings.

2. The armored cable load-bearing tow head assembly according to claim 1, characterized in that, The cabin body and the first end cover adopt an integral welding structure or a split assembly structure. A first through hole corresponding to the outer wall of the armored cable is arranged in the first end cover. A first threaded hole is arranged at the outer end of the first through hole. A first locking nut is arranged on the first threaded hole. A first conical hole is arranged in the first through hole in front of the first threaded hole. A first conical sealing sleeve is arranged in the first conical hole. A first washer is arranged between the first conical sealing sleeve and the first locking nut.

3. The armored cable load-bearing tow head assembly according to claim 1, characterized in that, A second end cover is arranged at the front end of the cabin body. A first screw for connecting with the cabin body is arranged on the second end cover. A second through hole corresponding to the inner sheath of the armored cable is arranged in the second end cover. A second threaded hole is arranged at the outer end of the second through hole. A second locking nut is arranged on the second threaded hole. A second conical hole is arranged in the second through hole behind the second threaded hole. A second conical sealing sleeve is arranged in the second conical hole. A second washer is arranged between the second conical sealing sleeve and the second locking nut. A sealing ring in contact with the inner wall of the cabin body is arranged on the second end cover.

4. The armored cable load-bearing towing head assembly according to claim 3, wherein, A bending limiter mounting hole is arranged on the first end cover, and an equipment mounting hole is arranged on the second end cover.

5. The armored cable load-bearing tow head assembly according to claim 1, characterized in that, The split conical part includes two symmetrically distributed semi-rings and a second screw for fixing the two semi-rings.

6. The armored cable load-bearing towing head assembly according to claim 1, characterized in that, The adjacent two winding rings are connected and fixed by arranging a third screw, and the outer diameter of the front-side winding ring is not less than that of the rear-side winding ring.

7. The armored cable load-bearing towing head assembly according to claim 6, characterized in that, The second support member adopts a hollow tube, and the third screw penetrates through the corresponding hollow tube.

8. The armored cable load-bearing towing head assembly according to claim 1, characterized in that, The first support members are distributed in an annular array, and potting glue is arranged in the cabin body.

9. An integrated method for a load-bearing tow head, which is used for the assembly and integration of the load-bearing tow head according to any one of claims 1 to 8, characterized in that, Including the following steps: Separate the non-metallic fiber armored load-bearing layers at the end of the armored cable. The N non-metallic fiber armored load-bearing layers are divided into the first non-metallic fiber armored load-bearing layer, the second non-metallic fiber armored load-bearing layer... the Nth non-metallic fiber armored load-bearing layer in the order from outside to inside. The M winding rings are divided into the first winding ring, the second winding ring... the Mth winding ring in the order from back to front; First, disperse the non-metallic fibers in the first non-metallic fiber armored load-bearing layer and evenly divide them into several fiber bundles. After winding each fiber bundle around the first winding ring for at least one circle, it passes through the inner side of the limiting ring along the outer wall of the inner conical sleeve and extends backward; Then, the non-metallic fibers in the second non-metallic fiber armored load-bearing layer are dispersed and evenly divided into several fiber bundles. After each fiber bundle is wound around the second winding ring or the first winding ring for at least one turn, it passes through the inner or outer side of the limiting ring along the outer wall of the inner conical sleeve and extends backward; The treatment of the inner non-metallic fiber armored load-bearing layer is carried out in the above manner in sequence, and each winding ring is used for winding the fiber bundles of at least one layer of non-metallic fiber armored load-bearing layer; The fiber bundles are grouped and braided or knotted at the rear side of the limiting ring to achieve pre-stretching of the fiber bundles; The split conical part is installed on the front side of the limiting ring and holds all the fiber bundles. By tightening the second screw to apply a pre-tightening force, the limiting ring is forced to move backward to ensure the tension of the fiber bundles; The cabin is placed vertically on the bracket, and the first end cover located at the bottom of the cabin at this time is fixed through the flange on the bracket, and multiple layers of glue are poured through the port at the top of the cabin.

10. The integrated method of the load-bearing towing head according to claim 9, characterized in that, The fiber bundles of at least one layer of non-metallic fiber armored load-bearing layer extend backward from the outer side of the limiting ring, and each group of fiber bundles for braiding or knotting contains the fibers of multiple layers of non-metallic fiber armored load-bearing layers.

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