Fiber reducing cable and manufacturing method thereof

Abstract

The invention discloses a fiber reducing cable and a manufacturing method thereof, the fiber reducing cable comprises a cable body, the cable body comprises a rope core and a sheath, the rope core comprises a thick rope part, a reducing part and a thin rope part, and the rope core is composed of a plurality of sub-ropes. Wherein the sub-ropes comprise thick ropes and thin ropes, the thick rope part is formed by arranging all the sub-ropes in parallel, the number of the sub-ropes in the diameter changing part is gradually reduced along with increasing of the diameter changing length of the mooring rope, the thin rope part is formed by arranging a plurality of sub-ropes in parallel, and the sheath is woven outside the rope core. The cable is designed into a gradual change cable structure, one end of the gradual change cable is designed into a thick rope, and it is ensured that the cable has enough strength and bearing capacity; and the other end adopts a string design, so that winding and fixing through equipment such as a winch are facilitated, and meanwhile, the space is greatly saved. The transition part in the middle achieves smooth transition from thick to thin by optimizing the arrangement and weaving technology of the sub-ropes, and the problems of stress concentration and sudden strength change are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a fiber reducer cable and a manufacturing method thereof. Background Art

[0002] In the fields of marine engineering, shipbuilding, etc., cables play a vital role as an important connection and load-bearing component. Traditional cable designs often use fiber ropes of a single diameter, which has obvious limitations in specific application scenarios. For example, in the FPSO (Floating Production Storage and Offloading Unit) tie-back lifting operation, the cables need to meet the requirements of high strength, easy handling, and maximum space utilization.

[0003] Traditional thick ropes have high strength and can withstand large tension, but when winding through winches and other equipment, due to their large diameter, they take up more space and are not easy to arrange closely, resulting in reduced winch efficiency. Although thin ropes are easy to wind and save space, they have relatively low strength and are difficult to withstand large tension alone, limiting their application in heavy-load operations.

[0004] In order to overcome this problem, some solutions have appeared on the market that attempt to improve the performance of cables by changing their structure or materials. However, most of these solutions can only make limited improvements in strength or space utilization, and are often accompanied by a significant increase in cost or a significant increase in manufacturing difficulty. Therefore, there is an urgent need for a new cable design that can take advantage of the high strength of thick ropes while taking advantage of the flexibility and space saving of thin ropes. Summary of the invention

[0005] The object of the present invention is to provide a fiber reducer cable and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A method for manufacturing a fiber reducer cable, the manufacturing method is as follows:

[0008] Step 1: Making sub-rope: weaving the fibers into 12-strand structural sub-rope through doubling, twisting, stranding, rope making and / or coating processes, with a total of multiple sub-ropes being woven;

[0009] Step 2: Making the rope core: Place multiple sub-rope in parallel to form a thick rope part. In order to achieve the diameter-changing effect, the lengths of the sub-rope are different. Insert the end of the shorter sub-rope into the longer sub-rope to connect the sub-rope, thereby making the rope core. After the sub-rope is interlaced with each other, the number of sub-rope in the diameter-changing part will gradually decrease, and gradually decrease to the number of sub-rope in the thin rope part.

[0010] Step three: sheath weaving: the rope core obtained in step two is passed through a horizontal braiding machine to weave a sheath on the outside. The number of strands of the sheath can be any one of 96, 64 or 32. During the weaving process, the number of strands of the sheath gradually changes to half of the original number, thereby achieving overall coverage of the variable diameter part and the thin rope part.

[0011] Preferably, in step 2, when achieving diameter change, the end of one sub-rope is inserted into the middle of another sub-rope, and the insertion length is at least 10 times the diameter of the sub-rope. When one sub-rope is inserted into another sub-rope, a diameter change part is formed. The number of sub-rope in the diameter change part of the rope core gradually decreases with the increase of the diameter change length, and the spacing of the reduced sub-rope is not less than 0.5m.

[0012] Preferably, in step 2, the number of sub-ropes in the thin rope portion is not less than 3.

[0013] Preferably, the length of the reduced diameter portion should be at least 10 m.

[0014] A fiber variable diameter cable comprises a cable body, wherein the cable body comprises a rope core and a sheath, wherein the rope core comprises a plurality of sub-ropes, wherein the rope core is woven from the plurality of sub-ropes, and each part has a different arrangement of the sub-ropes, wherein the rope core is divided into a thick rope part, a variable diameter part and a thin rope part, wherein the thick rope part is composed of all the sub-ropes arranged in parallel, the number of the sub-ropes in the variable diameter part gradually decreases with the increase of the variable diameter length, the thin rope part is composed of a plurality of sub-ropes arranged in parallel, and the sheath is woven on the outside of the rope core.

[0015] Beneficial effects: The cable is designed as a gradient cable structure. One end of the gradient cable adopts a thick rope design to ensure that it has sufficient strength and load-bearing capacity; the other end adopts a thin rope design, which is convenient for winding and fixing by winches and other equipment, while greatly saving space. The transition part in the middle achieves a smooth transition from thick to thin by optimizing the arrangement and weaving technology of the sub-rope, avoiding the problems of stress concentration and sudden strength changes, and can not only give play to the high strength advantages of the thick rope, but also take advantage of the flexibility and space saving of the thin rope. The outer part of the gradient cable is woven with a sheath, and the rope core is wrapped as a whole by the sheath, which can not only increase the strength and wear resistance of the variable cable, but also prevent the plugged sub-rope from loosening during the use of the rope core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment;

[0017] Figure 2 This is a schematic diagram for showing the thin rope part of the cable body in the first embodiment;

[0018] Figure 3 This is a schematic diagram for showing the thick rope portion of the cable body in Example 1;

[0019] Figure 4 This is a schematic diagram of the structure of each sub-rope used to illustrate the embodiment;

[0020] Figure 5 This is a schematic diagram of an embodiment for illustrating the plugging of a single sub-rope;

[0021] Figure 6 The embodiment is used to show the schematic diagram of plugging two sub-cords;

[0022] Figure 7 This is a schematic diagram for showing the thick rope portion of the cable body in the second embodiment;

[0023] Figure 8 This is a schematic diagram of the second embodiment for showing the thin rope portion of the cable body.

[0024] Figure numerals: 1. cable body; 2. rope core; 3. sheath; 4. sub-rope. DETAILED DESCRIPTION

[0025] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. At the same time, it should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0026] Example 1, see Figure 1-6 As shown,

[0027] A method for manufacturing a fiber reducer cable, the manufacturing method is as follows:

[0028] Step 1: Making sub-rope: Weaving HMPE fiber into 12-strand structural sub-rope 4 through doubling, twisting, stranding, rope making or / and coating processes, with 27 strands of sub-rope 4 being woven in total, the diameter of sub-rope 4 being 26 mm, and the braiding pitch of sub-rope 4 being 155 mm;

[0029] Step 2: Making the rope core: Place the sub-ropes 4 in parallel, and the ends where the sub-ropes 4 converge together form a thick rope part. The nominal diameter of the rope core of the thick rope part is 135mm, and the designed breaking tensile force is 1250t. In order to achieve the variable diameter effect, the sub-ropes 4 are woven into structures of different lengths during weaving. The ends of the shorter sub-ropes 4 are inserted into the longer sub-ropes 4 to achieve the connection between the sub-ropes 4. Through the plug-in cooperation of the sub-ropes 4, the rope core 2 is finally formed. After the sub-ropes 4 are interlaced with each other, the number of sub-ropes 4 in the variable diameter part will gradually decrease, and gradually decrease to the required number of sub-ropes 4 in the thin rope part. The sub-ropes 4 are gradually reduced from 27 to 4 through plug-in. The nominal diameter of the rope core of the thin rope part is 52mm, and the designed breaking tensile force is 180t.

[0030] In step 2, since the sub-rope 4 is a 12-strand structure, the middle part of the sub-rope 4 is a hollow structure. When the diameter is changed, the end of one sub-rope 4 is inserted into the middle of another sub-rope 4, and the insertion length is at least 500mm. When one sub-rope 4 is inserted into another sub-rope 4, a diameter-changing part is formed. In the diameter-changing part of the rope core 2, the number of sub-rope 4 gradually decreases with the increase of the diameter-changing length, and the spacing of the sub-rope 4 is not less than 0.5m. The diameter-changing length of the rope core 2 is 15m.

[0031] Step three: sheath weaving: the outside of the rope core 2 prepared in step two is passed through a horizontal braiding machine to weave a sheath 3 on the outside. The thickness of the sheath 3 is 8 mm. The number of strands of the sheath 3 in the variable diameter part is gradually reduced during weaving, so that the sheath 3 can adapt to the variable diameter structure of the rope core 2 and achieve overall covering of the variable diameter part and the thin rope part. The overall wrapping of the rope core 2 by the sheath 3 can not only increase the strength and wear resistance of the variable diameter cable, but also prevent the loosening of the plugged sub-ropes 4 during the use of the rope core 2.

[0032] Embodiment 2, see Figure 1 , 7 and 8

[0033] Step 1: making sub-rope: weaving HMPE fiber into 12-strand structural sub-rope 4 through doubling, twisting, stranding, rope making or / and coating processes, with 18 strands of sub-rope 4 being woven in total, the diameter of sub-rope 4 being 24 mm, and the braiding pitch of sub-rope 4 being 360 mm;

[0034] Step 2: Making the rope core: Place the sub-ropes 4 in parallel, and the ends where the sub-ropes 4 converge together form a thick rope part. The nominal diameter of the rope core of the thick rope part is 128mm, and the designed breaking tensile force is 1050t. In order to achieve the variable diameter effect, the sub-ropes 4 are woven into structures of different lengths during weaving. The ends of the shorter sub-ropes 4 are inserted into the longer sub-ropes 4 to achieve the connection between the sub-ropes 4. Through the plug-in cooperation of the sub-ropes 4, the rope core 2 is finally formed. After the sub-ropes 4 are interlaced with each other, the number of sub-ropes 4 in the variable diameter part will gradually decrease, and gradually decrease to the required number of sub-ropes 4 in the thin rope part. The number of sub-ropes 4 is gradually reduced from 27 to 3 through plug-in. The nominal diameter of the rope core of the thin rope part is 42mm, and the designed breaking tensile force is 120t.

[0035] In step 2, since the sub-rope 4 is a 12-strand structure, the middle part of the sub-rope 4 is a hollow structure. When the diameter is changed, the end of one sub-rope 4 is inserted into the middle of another sub-rope 4, and the insertion length is at least 500mm. When one sub-rope 4 is inserted into another sub-rope 4, a diameter-changing part is formed. In the diameter-changing part of the rope core 2, the number of sub-rope 4 gradually decreases with the increase of the diameter-changing length, and the spacing of the sub-rope 4 is not less than 0.5m. The diameter-changing length of the rope core 2 is 15m.

[0036] Step 3: Sheath weaving: The outer part of the rope core 2 prepared in step 2 is passed through a horizontal braiding machine to braid a sheath 3 on the outer part. The thickness of the sheath 3 is 10 mm. The number of strands of the sheath 3 in the braided variable diameter part is gradually reduced during braiding, so that the sheath 3 can adapt to the variable diameter structure of the rope core 2 and realize the overall covering of the variable diameter part and the thin rope part. The overall wrapping of the rope core 2 by the sheath 3 can not only increase the strength and wear resistance of the variable diameter cable, but also prevent the rope core 2 from becoming loose during use.

[0037] A fiber variable-diameter cable comprises a cable body 1, wherein the cable body 1 comprises a rope core 2 and a sheath 3, wherein the rope core 2 comprises a plurality of sub-ropes 4, each of which is woven from HMPE fibers, and the rope core 2 is woven from a plurality of sub-ropes 4, wherein the rope core 2 is divided into a thick rope portion, a variable-diameter portion and a thin rope portion, wherein the thick rope portion is composed of all the sub-ropes 4 arranged in parallel, and the number of the sub-rope 4 in the variable-diameter portion gradually decreases with the increase of the variable-diameter length, and the thin rope portion is composed of a plurality of sub-rope 4 arranged in parallel, and the sheath 3 is woven on the outside of the rope core 2.

Claims

1. A method for manufacturing a fiber reducer cable, the manufacturing method is as follows: Step 1: making sub-rope: weaving the fibers into 12-strand structural sub-rope (4) through doubling, twisting, stranding, rope making and / or coating processes, wherein a plurality of sub-rope (4) are woven; Step 2: making the rope core: placing a plurality of sub-rope (4) in parallel to form a thick rope portion. In order to achieve a variable diameter effect, the lengths of the sub-rope (4) are different. The ends of the shorter sub-rope (4) are inserted into the longer sub-rope (4) to achieve the connection between the sub-rope (4), thereby making the rope core (2). After the sub-rope (4) is interlaced with each other, the number of sub-rope (4) in the variable diameter portion will gradually decrease and gradually decrease to the number required for the sub-rope (4) in the thin rope portion. Step three: sheath weaving: the rope core (2) obtained in step two is passed through a horizontal braiding machine to weave a sheath (3) on the outside. The number of strands of the sheath (3) can be any one of 96 strands, 64 strands or 32 strands. During the braiding process, the number of strands of the sheath (3) gradually changes to half of the original number, thereby achieving overall coverage of the variable diameter part and the thin rope part.

2. The method for manufacturing a fiber reducer cable according to claim 1, characterized in that: In step 2, when achieving diameter change, the end of one sub-rope (4) is inserted into the middle of another sub-rope (4), and the insertion length is at least 10 times the diameter of the sub-rope (4). When one sub-rope (4) is inserted into another sub-rope (4), a diameter change portion is formed. The number of sub-rope (4) in the diameter change portion of the rope core (2) gradually decreases as the diameter change length increases, and the reduced spacing of the sub-rope (4) is not less than 0.5m.

3. The method for manufacturing a fiber reducer cable according to claim 1, characterized in that: In step 2, the number of the thin rope part (4) is not less than 3.

4. The method for manufacturing a fiber reducer cable according to claim 2, characterized in that: The length of the reducing section should be at least 10m.

5. A fiber variable diameter cable, comprising a cable body (1), which is obtained by the manufacturing method described in any one of claims 1 to 4, the cable body (1) comprising a rope core (2) and a sheath (3), the rope core (2) comprising a plurality of sub-ropes (4), the rope core being composed of a plurality of sub-ropes (4) woven together, the rope core (2) being divided into a thick rope portion, a variable diameter portion and a thin rope portion, the thick rope portion being composed of all the sub-ropes (4) arranged in parallel, the number of the sub-ropes (4) in the variable diameter portion gradually decreasing with the increase of the variable diameter length, the thin rope portion being composed of a plurality of sub-ropes (4) arranged in parallel, and the sheath (3) being woven on the outside of the rope core (2).

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