阅读说明：本技术 一种高电压复合脐带缆及其制作工艺 (High-voltage composite umbilical cable and manufacturing process thereof ) 是由 陈凯 倪凌霄 潘矗直 荆彪 杨婉秋 陈仁栋 王立斌 于 2021-07-07 设计创作，主要内容包括：本发明公开了一种高电压复合脐带缆,包括内层功能单元组、外层功能单元组以及外护套,所述内层功能单元组包括设置于中心处的三个内层中压电缆单元以及内层填充钢管单元,所述外层功能单元组包括四个外层钢管单元,四个外层钢管单元将外层功能单元外周分隔为四个安装区域,其中三个安装区域内分别设有外层中压电缆单元、两个低压电缆单元、外层填充钢管单元和填充体,另一个安装区域内设有钢绞线单元、两个低压电缆单元、外层填充钢管单元和填充体。本发明提供一种高电压复合脐带缆及其制作工艺,脐带缆的抗拉强度高,重量轻,而且制作方便。(The invention discloses a high-voltage composite umbilical cable which comprises an inner layer functional unit group, an outer layer functional unit group and an outer sheath, wherein the inner layer functional unit group comprises three inner layer medium-voltage cable units and inner layer filling steel pipe units which are arranged in the center, the outer layer functional unit group comprises four outer layer steel pipe units, the four outer layer steel pipe units divide the periphery of the outer layer functional unit into four installation areas, the three installation areas are respectively provided with the outer layer medium-voltage cable unit, the two low-voltage cable units, the outer layer filling steel pipe unit and a filling body, and the other installation area is internally provided with a steel strand unit, the two low-voltage cable units, the outer layer filling steel pipe unit and the filling body. The invention provides a high-voltage composite umbilical cable and a manufacturing process thereof.)

1. The utility model provides a compound umbilical cable of high voltage, includes inlayer functional unit group, set up in the outer functional unit group of inlayer functional unit group periphery and with the sheathed oversheath of outer functional unit group, its characterized in that: the inner layer functional unit group comprises three inner layer medium voltage cable units which are arranged at the center and distributed in an equilateral triangle shape and inner layer filling steel pipe units which are filled between two adjacent inner layer medium voltage cable units, the outer layer functional unit group comprises four outer layer steel pipe units which are uniformly distributed at the periphery of the inner layer functional unit along the circumference, the four outer layer steel pipe units divide the periphery of the outer layer functional unit into four mounting areas, wherein three installing areas are respectively provided with an outer medium voltage cable unit, two low voltage cable units positioned at two sides of the outer medium voltage cable unit, an outer filling steel pipe unit positioned at one side of the outer medium voltage cable unit and a filling body positioned at the other side of the outer medium voltage cable unit, and another installing area is internally provided with a steel strand unit, two low voltage cable units positioned at two sides of the steel strand unit, an outer filling steel pipe unit positioned at one side of the steel strand unit and a filling body positioned at the other side of the steel strand unit.

2. A high voltage composite umbilical as claimed in claim 1 wherein: the outer sheath is provided with a plurality of holes penetrating through the outer layer functional unit group, and the plurality of holes are distributed along the axial direction of the outer sheath.

3. A process for making a high voltage composite umbilical as claimed in any one of claims 1 to 2 wherein: the method comprises the following steps:

a. arranging the three inner medium-voltage cable units and the three inner filling steel pipe units according to preset positions, and performing first cabling through a cabling machine to form an inner functional unit group;

b. after cabling, inner-layer belt wrapping is connected and wrapped at the periphery of the inner-layer functional unit group;

c. arranging four outer-layer steel pipe units, one steel strand unit, three outer-layer medium-voltage cable units, eight low-voltage cable units, four filling bodies and four outer-layer filling steel pipe units according to preset positions, guiding the steel pipe units to a cable pressing die of a cable former through a distribution panel, and performing secondary cabling through the cable former to form an outer-layer functional unit group;

d. outer-layer wrapping belts are connected and wrapped around the periphery of the outer-layer functional unit group after cabling,

e. extruding a layer of outer sheath on the periphery of the outer layer functional unit group through an extruder;

f. and (4) drilling balance holes on the outer sheath.

4. The process of claim 3, wherein the composite umbilical is made by a process comprising: in step a, the joint part of the cabled inner-layer medium-voltage cable unit is wound with an adhesive tape, and in step c, the joint part of the cabled low-voltage cable unit is wound with an adhesive tape, and the two adhesive tapes are made different in color for distinction.

5. The process of claim 3, wherein the composite umbilical is made by a process comprising: in the step g, the diameter of the balance holes is 2cm, the number of the balance holes is multiple, the balance holes are distributed along the axial direction of the outer sheath, and the distance between every two adjacent balance holes is 50 m.

6. The process of claim 3, wherein the composite umbilical is made by a process comprising: the cabling direction during the first cabling is opposite to the cabling direction during the second cabling.

7. The process of claim 3, wherein the composite umbilical is made by a process comprising: the thickness of the outer sheath is 6.5 mm-7.5 mm, and the traction speed of the extruder to the outer sheath is 0.8 m/s-3 m/s.

8. The process of claim 3, wherein the composite umbilical is made by a process comprising: a central hole positioned at the center of the wire distributing plate and a plurality of wire threading holes formed around the periphery of the central hole, the central hole is used for guiding the inner layer functional unit to the cable pressing die of the cabling machine, the threading hole is used for guiding the outer layer functional unit to be cabled, an outer mounting ring is arranged on one side of the distributing plate and is positioned between the threading hole and the periphery of the distributing plate, a plurality of mounting holes matched with the threading holes are radially arranged on the outer mounting ring, push rods are arranged in the mounting holes, the tail ends of the push rods extend into the threading holes, a pinch roller is arranged, the axial direction of the pinch roller is vertical to the axial direction of the threading hole, the periphery of the outer mounting ring is provided with an adjusting screw arranged in the mounting hole, and a spring is further arranged in the mounting hole, one end of the spring is abutted against the adjusting screw, and the other end of the spring is abutted against the head end of the push rod.

9. The process of claim 8, wherein the composite umbilical is made by a process comprising: the push rod is provided with a guide limiting lug protruding outwards, the inner wall of the mounting hole is provided with a guide limiting groove along the axial direction, the tail end of the guide limiting groove is in a closed state, and the guide limiting lug moves along the guide limiting groove and is limited by the tail end of the guide limiting groove.

Technical Field

The invention relates to the technical field of cables, in particular to a high-voltage composite umbilical cable and a manufacturing process thereof.

Background

The umbilical cable is the combination of cable, optical cable, hydraulic pressure pipe, and the main function is: 1. providing power to the subsea production system; 2. providing a hydraulic channel for controlling the underwater production system; 3. providing a chemical agent pipeline required by oil and gas field development; 4. and transmitting the control signal of the upper module and the sensor data of the underwater production system.

Adopt steel wire armor to strengthen in the conventional umbilical usually, nevertheless can lead to the weight of umbilical to be bigger and bigger, need increase a large amount of buoyancy pieces again on the umbilical, so greatly increased equipment cost and marine construction cost, still can lead to umbilical preparation technology complicacy in addition, influence production efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the high-voltage composite umbilical cable and the manufacturing process thereof are provided, and the umbilical cable has high tensile strength, light weight and convenient manufacturing.

In order to achieve the above object, the present invention provides the following technical solutions.

The utility model provides a compound umbilical cable of high voltage, includes inlayer functional unit group, set up in the outer functional unit group of inlayer functional unit group periphery and with the sheathed oversheath of outer functional unit group, its characterized in that: the inner layer functional unit group comprises three inner layer medium voltage cable units which are arranged at the center and distributed in an equilateral triangle shape and inner layer filling steel pipe units which are filled between two adjacent inner layer medium voltage cable units, the outer layer functional unit group comprises four outer layer steel pipe units which are uniformly distributed at the periphery of the inner layer functional unit along the circumference, the four outer layer steel pipe units divide the periphery of the outer layer functional unit into four mounting areas, wherein three installing areas are respectively provided with an outer medium voltage cable unit, two low voltage cable units positioned at two sides of the outer medium voltage cable unit, an outer filling steel pipe unit positioned at one side of the outer medium voltage cable unit and a filling body positioned at the other side of the outer medium voltage cable unit, and another installing area is internally provided with a steel strand unit, two low voltage cable units positioned at two sides of the steel strand unit, an outer filling steel pipe unit positioned at one side of the steel strand unit and a filling body positioned at the other side of the steel strand unit.

The invention has the beneficial effects that: the high-voltage composite umbilical cable has the advantages that the three inner medium-voltage cable units are arranged at the center and are in equilateral triangles, the structure is stable, the steel pipe units and the inner fillers are filled in the inner layers between the two adjacent inner medium-voltage cable units, most of external pressure applied to the inner medium-voltage cable units is transmitted to the inner filled steel pipe units, the inner medium-voltage cable units bear smaller pressure, the four outer steel pipe units are uniformly distributed on the periphery of the inner functional units, the overall strength and stability of the whole umbilical cable are improved, the umbilical cable can be used in a deep water environment for a long time without deformation and damage, stress concentration is avoided, and the four large steel pipes form one installation area to form four installation areas, three outer medium voltage cable units are distributed in three of the installation areas, one steel strand unit is distributed in one of the installation areas, so that the units in each installation area are distributed uniformly, the stress on the periphery of the umbilical cable can be stabilized, the medium voltage cable units are not in mutual contact and cannot be extruded mutually, the extrusion deformation among the cable units is effectively prevented, two low voltage cable units positioned at two sides of the outer medium voltage cable units, an outer layer filling steel pipe unit positioned at one side of the outer medium voltage cable units and a filling body positioned at the other side of the outer medium voltage cable units are arranged in the three installation areas, two low voltage cable units positioned at two sides of the steel strand units, an outer layer filling steel pipe unit positioned at one side of the steel strand units and a filling body positioned at the other side of the steel strand units are arranged in the other installation area, can bear great pressure to guarantee the stability of low tension cable unit, make the umbilical more be applicable to the ultra-deep water environment, also can control the weight of umbilical simultaneously, for the umbilical of area armor, under the condition that each item mechanical properties satisfies the requirement, reduced the simple weight of umbilical moreover, reach lightweight purpose, make it be applicable to the ultra-deep water field.

As an improvement of the invention, the steel strand unit comprises a steel wire group and a steel strand sheath wrapped outside the steel wire group.

As an improvement of the invention, the inner medium voltage cable unit comprises three-phase medium voltage cables, a medium voltage cable filler filled between the three-phase medium voltage cables, and a medium voltage cable tape for wrapping the three-phase medium voltage cables and the medium voltage cable filler; the medium-voltage cables of all phases comprise medium-voltage cable conductors arranged in the center, medium-voltage cable conductor shields, medium-voltage cable conductor insulators, medium-voltage cable conductor insulating shields, medium-voltage cable metal shields and medium-voltage cable inner sheaths, wherein the medium-voltage cable conductors, the medium-voltage cable conductors and the medium-voltage cable inner sheaths are sequentially wrapped outside the medium-voltage cable conductors from inside to outside.

As an improvement of the invention, the low-voltage cable unit structure comprises a low-voltage cable conductor, low-voltage cable filler filled in the low-voltage cable conductor, and a low-voltage cable conductor insulator, a low-voltage cable conductor sheath, a weak current metal shield and an outer layer sheath which are sequentially wrapped outside the low-voltage cable conductor.

As an improvement of the invention, the outer layer steel pipe unit and the inner layer filling steel pipe unit both comprise steel pipes and steel pipe sheaths coated on the outer sides of the steel pipes.

As an improvement of the invention, the outer sheath is provided with a hole penetrating to the outer layer functional unit group.

A process for making the high voltage composite umbilical comprising the steps of:

a. arranging the three inner medium-voltage cable units, the three inner filling steel pipe units and the three inner fillers according to preset positions, and performing first cabling through a cabling machine to form an inner functional unit group;

b. after cabling, inner-layer belt wrapping is connected and wrapped at the periphery of the inner-layer functional unit group;

c. arranging four outer-layer steel pipe units, one steel strand unit, three outer-layer medium-voltage cable units, eight low-voltage cable units, four filling bodies and four outer-layer filling steel pipe units according to preset positions, guiding the steel pipe units to a wire pressing die of a cabling machine through a wire distributing disc, and performing secondary cabling through the cabling machine to form an outer-layer functional unit group;

d. outer-layer wrapping belts are connected and wrapped around the periphery of the outer-layer functional unit group after cabling,

e. extruding a layer of outer sheath on the periphery of the outer layer functional unit group through an extruder;

f. and (4) drilling balance holes on the outer sheath.

As a modification of the present invention, in step a, the joint portion of the cabled medium-voltage cable unit is wound with an adhesive tape, in step d, the joint portion of the cabled low-voltage cable unit is wound with an adhesive tape, and the two adhesive tapes are made different in color for distinction.

As a modification of the present invention, in step g, the diameter of the balancing hole is 2cm, and the number of the balancing holes is plural, the plural balancing holes are distributed along the axial direction of the outer sheath, and the distance between two adjacent balancing holes is 50 m.

As an improvement of the invention, the cabling direction in the first cabling is opposite to the cabling direction in the second cabling.

As a modification of the invention, the thickness of the outer sheath is between 6.5mm and 7.5mm, and the drawing speed of the extruder to the outer sheath is between 0.8m/s and 3 m/s.

As a modification of the present invention, in step a, the cabling pitch of the cabling machine is between 1600mm and 1800 mm; in step c, the cabling pitch of the cabling machine is between 2800mm and 3200 mm.

In the step b, the inner-layer belt is fixed by winding a belt rope outside and is dismantled before entering the next process; in the step d, the outer layer packaging bag is fixed by wrapping ropes outside, and is dismantled before entering the next procedure.

As an improvement of the invention, a central hole at the center of the distributing board and a plurality of threading holes formed around the periphery of the central hole are arranged on the distributing board, the central hole is used for guiding an inner layer functional unit to a cable pressing die of the cable former, the threading holes are used for guiding an outer layer functional unit to perform cable formation, an outer mounting ring is arranged on one side of the distributing board and is positioned between the threading holes and the periphery of the distributing board, a plurality of mounting holes matched with the threading holes are radially arranged on the outer mounting ring, push rods are arranged in the mounting holes, the tail ends of the push rods extend into the threading holes and are provided with pressing wheels, the axial direction of the pressing wheels is vertical to the axial direction of the threading holes, adjusting screws arranged in the mounting holes are arranged on the periphery of the outer mounting ring, springs are also arranged in the mounting holes, one ends of the springs are abutted against the adjusting screws, the other end of the spring is propped against the head end of the push rod.

As an improvement of the invention, the wire distributing plate is further provided with an inner mounting ring, the inner mounting ring is arranged between the threading hole and the central hole, the inner mounting ring is radially provided with a plurality of adjusting holes matched with the threading hole, an adjusting rod is arranged in each adjusting hole, the tail end of each adjusting rod extends into the threading hole and is provided with an adjusting wheel, the axial direction of each adjusting wheel is perpendicular to the axial direction of the threading hole, an adjusting ring groove matched with the cabling unit is formed in each adjusting wheel, an elastic reset piece is arranged between the head end of each adjusting rod and the inner wall of each adjusting hole, and the elastic reset piece is sleeved at the head end of each adjusting rod.

As an improvement of the invention, a guide limiting lug is formed on the push rod in a protruding mode, a guide limiting groove is formed in the inner wall of the mounting hole along the axial direction, the tail end of the guide limiting groove is in a closed state, and the guide limiting lug moves along the guide limiting groove and is limited through the tail end of the guide limiting groove.

Drawings

FIG. 1 is a schematic cross-sectional view of an umbilical of the present invention.

Fig. 2 is a schematic diagram of the distribution board structure of the present invention.

Fig. 3 is an enlarged view of a portion of fig. 2 according to the present invention.

Fig. 4 is a partially enlarged view of the invention at B in fig. 2.

Fig. 5 is a schematic view of the combination of the pinch roller, the adjustment roller and the cabling unit of the present invention.

In the figure, 1, an outer sheath; 2. an inner medium voltage cable unit; 3. an outer medium voltage cable unit; 4. the inner layer is filled with steel pipe units; 5. the outer layer is filled with steel pipe units; 6. an outer layer steel pipe unit; 7. a steel strand unit; 8. a filler; 9. a low-voltage cable unit; 10. inner-layer belting; 11. an outer layer of belting; 12. a balance hole; 13. a distributing board; 14. threading holes; 15. an outer mounting ring; 16. a push rod; 17. mounting holes; 18. adjusting screws; 19. a pinch roller; 20. a spring; 21. a guide limit bump; 22. a guide limit groove; 23. an inner mounting ring; 24. an adjustment hole; 25. adjusting a rod; 26. an adjustment wheel; 27. an adjusting ring groove; 28. an elastic reset member; 29. a central bore.

Detailed Description

The invention is further explained with reference to the drawings.

Referring to fig. 1, the high-voltage composite umbilical cable includes an inner functional unit group, an outer functional unit group disposed at the periphery of the inner functional unit group, and an outer sheath 1 covering the outer functional unit group.

The inner layer functional unit group comprises three inner layer medium voltage cable units 2 and three inner layer filling steel pipe units 4, and the outer layer functional unit group comprises four outer layer steel pipe units 6, one steel strand unit 7, three outer layer medium voltage cable units 3, eight low voltage cable units 9, four filling bodies 8 and four outer layer filling steel pipe units 5.

Three inlayer middling pressure cable unit 2 sets up in center department to be equilateral triangle distribution, inlayer packing steel pipe unit 4 sets up between two adjacent inlayer middling pressure cable unit 2, thereby forms the cross-section and is the circular shape inlayer functional unit group, and the periphery of inlayer functional unit links up around package inlayer band 10.

Four outer steel pipe units 6 are along the periphery of circumference equipartition at the inlayer functional unit, form a mounting region between two adjacent outer steel pipe units 6, make four mounting regions of formation altogether between four outer steel pipe units 6, four mounting regions are upper and lower left and right distribution, wherein be located the left side, the right side, be equipped with an outer middling pressure cable unit 3 in the mounting region of top respectively, be located two low voltage cable unit 9 of outer middling pressure cable unit 3 both sides, be located the outer filler steel pipe unit 5 of middling pressure cable unit one side and be located the obturator 8 of middling pressure cable unit opposite side, be equipped with two low voltage cable unit 9 of a steel strand wires unit 7 both sides in the mounting region that is located the below, be located the outer filler steel pipe unit 5 of steel strand wires unit 7 one side and be located the obturator 8 of steel strand wires unit 7 opposite side.

The inner medium voltage cable unit 2 and the outer medium voltage cable unit 3 respectively comprise three-phase medium voltage cables, medium voltage cable fillers filled between the three-phase medium voltage cables, and medium voltage cable wrapping tapes for wrapping the three-phase medium voltage cables and the medium voltage cable fillers; the medium-voltage cables of all phases comprise medium-voltage cable conductors arranged in the center, medium-voltage cable conductor shields, medium-voltage cable conductor insulators, medium-voltage cable conductor insulating shields, medium-voltage cable metal shields and medium-voltage cable inner sheaths, wherein the medium-voltage cable conductors, the medium-voltage cable conductors and the medium-voltage cable inner sheaths are sequentially wrapped outside the medium-voltage cable conductors from inside to outside. The diameter of the medium voltage cable unit is 38.9mm, and the outer diameter and the mass of the medium voltage cable unit are large, so that the three medium voltage cable units are arranged in the center of the umbilical cable, and the overall stability can be effectively ensured.

The low-voltage cable unit 9 structure comprises a low-voltage cable conductor, a low-voltage cable filler filled in the low-voltage cable conductor, and a low-voltage cable conductor insulator, a low-voltage cable conductor sheath, a weak current metal shield and an outer sheath which are sequentially coated outside the low-voltage cable conductor. The diameter of the low voltage cable unit 9 is 23.2 mm.

And the water-blocking glue is added into the inner-layer medium-voltage cable unit 2 and the low-voltage cable unit 9 in the twisting process so as to prevent water from axially permeating along the umbilical cable in the electric unit under the condition of high-water-pressure umbilical cable breakage and meet the requirement of emergency repair of the ultra-deep water umbilical cable.

The steel strand unit 7 comprises a steel wire group and a steel strand sheath wrapped outside the steel wire group.

The diameter of the outer layer steel pipe unit 6 is 34.79mm, the diameters of the inner layer filling steel pipe unit 4 and the outer layer filling steel pipe unit 5 are 14.7mm, and the outer layer steel pipe unit 6, the inner layer filling steel pipe unit 4 and the outer layer filling steel pipe unit 5 all comprise steel pipes and steel pipe sheaths coated on the outer sides of the steel pipes.

The inner-layer filler and the outer-layer filler are made into shapes matched with each other according to the gaps, the gaps among the umbilical cable section units are reduced, the umbilical cable section is firmer, the tensile strength and the bending resistance of the umbilical cable can be enhanced, the manufacturing cost is low, and the anti-hydrostatic pressure collapse capability of the umbilical cable is improved.

Be equipped with the balancing hole 12 that runs through to outer functional unit group on the oversheath 1, the quantity of balancing hole 12 has a plurality ofly, and a plurality of balancing holes 12 distribute along the axial of oversheath 1, and the diameter of balancing hole 12 is 2cm, beats a balancing hole 12 every 50m for the umbilical cable is at the installation, and water can freely overflow to the umbilical cable inside through balancing hole 12, in order to reach the whole internal and external pressure balance's of umbilical cable purpose, makes the umbilical cable can not take place great cross-section deformation and squashed under the high-water pressure environment.

The high-voltage composite umbilical cable has the advantages that the three inner medium-voltage cable units 2 are arranged at the center and are in equilateral triangles, the structure is stable, the steel pipe units 4 and the inner fillers are filled in the inner layers between the two adjacent inner medium-voltage cable units 2, most of external pressure applied to the inner medium-voltage cable units 2 is transmitted to the inner filled steel pipe units 4, the inner medium-voltage cable units 2 bear smaller pressure, the four outer steel pipe units 6 are uniformly distributed on the periphery of the inner functional units, the overall strength and stability of the whole umbilical cable are improved, the umbilical cable can be used in a deep water environment for a long time without deformation and damage, stress concentration is avoided, and then an installation area is formed between the two adjacent large steel pipes, so that four installation areas are formed among the four large steel pipes, three outer medium voltage cable units 3 are distributed in three of the installation areas, one steel strand unit 7 is distributed in one of the installation areas, so that the units in each installation area are distributed uniformly, the stress on the periphery of the umbilical cable can be stabilized, the medium voltage cable units are not in mutual contact and cannot be extruded mutually, the extrusion deformation among the cable units is effectively prevented, two low voltage cable units 9 positioned at two sides of the outer medium voltage cable unit 3, an outer layer filling steel pipe unit 5 positioned at one side of the outer medium voltage cable unit 3 and a filling body 8 positioned at the other side of the outer medium voltage cable unit 3 are arranged in the three installation areas, two low voltage cable units 9 positioned at two sides of the steel strand unit 7, an outer layer filling steel pipe unit 5 positioned at one side of the steel strand unit 7 and a filling body 8 positioned at the other side of the steel strand unit 7 are arranged in the other installation area, can bear great pressure to guarantee the stability of low tension cable unit 9, make the umbilical more be applicable to the ultra-deep water environment, also can control the weight of umbilical simultaneously, for the umbilical of area armor, under the condition that each item mechanical properties satisfies the requirement, reduced the simple weight of umbilical moreover, reach lightweight purpose, make it be applicable to the ultra-deep water field.

The manufacturing process of the umbilical cable comprises the following steps:

a. arranging three inner medium voltage cable units 2 with the same specification and inner filling steel pipe units 4 according to preset positions, namely arranging the three inner medium voltage cable units 2 in an equilateral triangle, arranging the inner filling steel pipe units 4 between two adjacent inner medium voltage cable units 2 to enable the whole section to be circular, flattening the arrangement, avoiding the phenomena of overlapping, damage and the like, and performing primary cabling through a cabling machine to form an inner functional unit group; the joint part of the inner medium voltage cable unit 2 after cabling is wound by red adhesive tape, and the cabling direction is right; in this embodiment, the diameter of the inner medium voltage cable unit 2 is 38.9mm, the cabling pitch of the cabling machine is 1600mm to 1800mm, so as to meet the requirement of the minimum bending radius of the inner functional unit group, when the cabling pitch exceeds this range, the cabling is too loose, when the cabling pitch is lower than this range, the cabling is too tight, the stretch bending is problematic, and the joint of the inner medium voltage cable unit 2 after cabling is wound by red adhesive tape.

b. After cabling, an inner-layer belt 10 is connected and wrapped outside the inner-layer functional unit group; the inner-layer wrapping tape 10 of the wrapping is flat and compact, the overlapping width meets the technological requirements, the wrapping has no adverse phenomena such as edge warping and the like, and the joint is tightened by adopting a non-slip adhesive tape, so that the binding effect is achieved, and the tensile strength of the umbilical cable is enhanced; and a PP rope is wrapped outside the inner bag for fixing, so that the inner bag is protected and is detached before entering the next procedure.

c. Arranging four outer-layer steel pipe units 6, one steel strand unit 7, three outer-layer medium-voltage cable units 3, eight low-voltage cable units 9, four filling bodies 8 and four outer-layer filling steel pipe units 5 according to preset positions, and performing secondary cabling through a cabling machine to form an outer-layer functional unit group; the cabling units and the filling are arranged according to a cabling structure diagram, the arrangement is smooth, the phenomena of overlapping, damage and the like do not exist, the cabling units are guided to a cabling die of a cabling machine through a distributing board 13 and are cabled through the cabling machine, the joint part of the cabled low-voltage cable unit 9 is wound by yellow adhesive tape to be distinguished from the joint part of the inner-layer medium-voltage cable unit 2, the cabling direction is the left direction and is opposite to the cabling direction in the step a, so that the torsion balance is controlled and the structural strength is ensured; the tension of the cable former on the outer steel pipe unit 6 is 170kg-230kg, the tension of the cable former on the steel strand unit 7 is 230kg-270kg, the tension of the cable former on the low-voltage cable unit 9 is 60kg-100kg, and the units are straightened through the cable forming tension, so that the loose of a cable forming structure is avoided; setting tension with different sizes for the cabling machine according to the arrangement positions of different units, when the tension is larger, pulling the corresponding unit to the center of the umbilical cable, and when the tension is smaller, pulling the corresponding unit to the center far away from the umbilical cable; in the embodiment, the diameter of the outer steel pipe unit 6 is 34.79mm, the diameter of the steel strand unit 7 is 23.1mm, and the diameter of the low-voltage cable unit 9 is 23.2 mm; the cabling pitch of the cabling machine is between 2800mm and 3200mm so as to meet the requirement of the minimum bending radius of the inner layer functional unit group; the joint part of the cabled low-voltage cable unit 9 is wound by yellow adhesive tape to be distinguished from the inner medium-voltage cable unit 2.

d. After cabling, an outer wrapping layer wrapping tape 11 is connected outside the outer layer functional unit group, and the wrapping is smooth and compact, and the overlapping width meets the process requirements. No bad phenomena such as edge warping and the like exist in the wrapping, and the joints are tightened by adopting non-slip adhesive tapes; plays the effect of ligature, has strengthened umbilical cable's tensile strength to fix around the package PP rope outside outer bag, the guard action, and demolish before getting into next process.

e. Extruding a layer of outer sheath 1 on the periphery of the outer layer functional unit group through an extruder; the outer sheath 1 is yellow, the outer diameter before extrusion is 158.2, the allowable deviation is plus or minus 3mm, the outer diameter after extrusion is 171.8mm, the allowable deviation is plus or minus 4mm, the thickness is 7.0mm, the thickness of the thinnest point is 6.5mm, the thickness of any point on the outer sheath 1 is not less than the thinnest point, the outer surface is smooth and flat, the defects of holes, cracks, bubbles, depressions and the like are avoided, and no air holes visible by visual inspection are formed in the cross section; because the thickness of the outer sheath 1 is larger, the traction speed of the extruder to the outer sheath 1 is set to be 0.8m/s to 3m/s, the phenomenon that the extruder is overloaded when the traction speed is too high is avoided, the phenomenon that the production efficiency is influenced due to too small traction speed is avoided, and the uniform thickness of the outer sheath 1 is ensured.

f. And (3) drilling balance holes 12 on the outer sheath 1, wherein each balance hole 12 penetrates through the whole sheath layer until the wrapping tape, the diameter of each balance hole 12 is 2cm, and one balance hole 12 is drilled every 50 m.

g. The identification is performed on the outer sheath 1: the mark is durable and waterproof, and simultaneously provides all-round (360 degrees) clear visibility, the mark background is not less than 80mm multiplied by 300mm, and the color of the mark character with the background color of orange is black and is not less than 25.4 mm.

In addition, when the inner-layer functional unit and the outer-layer functional unit are cabled through the cabling machine, the cabling direction is opposite, so that the cabling stability is improved.

Referring to fig. 2 to 5, a central hole 29 at the center of the distribution board 13 and a plurality of threading holes 14 formed around the periphery of the central hole 29, wherein the number of the threading holes 14 is at least matched with the number of the cabling units, the central hole 29 is used for guiding the inner-layer functional units, the threading holes 14 are used for guiding the outer-layer functional units to be cabled, the diameter of the outer-layer steel pipe unit 6 is 34.79mm, the diameter of the steel strand unit 7 is 23.1mm, and the diameter of the low-voltage cable unit 9 is 23.2 mm;

the diameters of a plurality of units are different, and when different stranding units pass through threading hole 14, if the aperture of threading hole 14 and the diameter of stranding unit differ when great, then can lead to the stranding unit when removing, can produce the winding and bend and great rocking.

In this embodiment, an outer mounting ring 15 and an inner mounting ring 23 are arranged on one side of the distribution board 13 through which the cabling unit passes, the outer mounting ring 15 is located between the threading hole 14 and the periphery of the distribution board 13, and the inner mounting ring 23 is arranged between the threading hole 14 and the central hole 29.

A plurality of mounting holes 17 matched with the threading holes 14 are radially arranged on the outer mounting ring 15, a push rod 16 is arranged in the mounting hole 17, the head end of the push rod 16 is positioned in the mounting hole 17, the tail end of the push rod 16 extends into the threading hole 14, a pinch roller 19 is rotatably arranged, the periphery of the outer mounting ring 15 is provided with an adjusting screw 18 arranged in the mounting hole 17, a spring 20 is further arranged in the mounting hole 17, one end of the spring 20 is abutted against the adjusting screw 18, the other end of the spring 20 is pressed against the head end of the push rod 16, the push rod 16 moves towards the center of the threading hole 14 under the action of the spring 20, when the cable unit passes through the threading hole 14, the push rod 16 pushes the pinch roller 19 to contact with the cable unit, thereby eliminating the clearance, avoiding minor diameter's stranding unit winding in through wires hole 14 and bending, guaranteeing the stranding effect better.

And the axial direction of the pinch roller 19 is perpendicular to the axial direction of the threading hole 14, so that when the cable unit passes through the threading hole 14, the rotation direction of the pinch roller 19 is matched with the moving direction of the cable unit, the cable unit can be assisted to move in the threading hole 14, the cable unit is prevented from being stuck, the pinch roller 19 is made of nylon rubber material, has certain rigidity and elasticity, and cannot scratch the surface of the cabling unit, the pinch roller 19 can be enabled to have proper pressing force through the action of the spring 20, so that a gap between the pinch roller 19 and the cable unit can be avoided, the cable unit can be prevented from being bent, the pinch roller 19 can be prevented from excessively extruding the cable unit to influence the movement of the cable unit, in addition, the compression degree of the spring 20 can be adjusted through the arrangement of the adjusting screw 18, so that the position of the pinch roller 19 and the pressing force of the pinch roller 19 can be adjusted, therefore, the cable-forming units with different diameters are adapted, the use requirements of the cable-forming units with different diameters are met, when the pressing force of the pressing wheel 19 is too small, the adjusting screw 18 can be screwed down, and when the pressing force of the pressing wheel 19 is too large, the adjusting screw 18 can be unscrewed, so that the adjustment is convenient.

A plurality of adjusting holes 24 matched with the threading holes 14 are radially arranged on the inner mounting ring 23, an adjusting rod 25 is arranged in each adjusting hole 24, the tail end of the adjusting rod 25 extends into the threading hole 14 and is provided with an adjusting wheel 26, the head end of the adjusting rod 25 is positioned in the adjusting hole 24, the axial direction of the adjusting wheel 26 is perpendicular to the axial direction of the threading hole 14, an adjusting ring groove 27 matched with the cabling unit is formed in the adjusting wheel 26, namely, the cabling unit is positioned between the adjusting wheel 26 and the pressing wheel 19, when the pressing wheel 19 applies axial pressing force to the cabling unit, the cabling unit is pressed into the adjusting ring groove 27, an elastic resetting piece 28 is arranged between the head end of the adjusting rod 25 and the inner wall of the adjusting hole 24, the elastic resetting piece 28 is sleeved at the head end of the adjusting rod 25, and the elasticity of all the elastic resetting pieces 28 is enough to enable the adjusting wheel 26 to press the cabling unit and prevent the cabling unit from being twisted, when the cable-forming unit has a twisting tendency, the cable-forming unit can be matched with the inner wall of the adjusting ring groove 27, the adjusting wheel 26 and the adjusting rod 25 are pushed to have a tendency of offsetting in the axial direction, and then the elastic resetting piece 28 can be compressed, because the elastic resetting piece 28 is abutted against the adjusting rod 25, the elastic resetting piece 28 can generate an elastic acting force at the moment, under the acting force of the elastic resetting piece 28, the adjusting rod 25 is reset, so that a corresponding counter acting force is applied to the cable-forming unit through the adjusting wheel 26, the cable-forming unit is pressed to prevent the cable-forming unit from twisting, the rotation of the cable-forming unit in the advancing process is avoided, and the phenomenon of deviation before the cable-forming unit enters a cable-forming machine cable-pressing die is prevented.

In addition, a guide limiting bump 21 is formed on the push rod 16 in a protruding manner along the radial direction, a guide limiting groove 22 is axially formed in the inner wall of the mounting hole 17, the end of the guide limiting groove 22 is in a closed state, the guide limiting bump 21 moves along the guide limiting groove 22 and is limited by the end of the guide limiting groove 22, the moving path of the push rod 16 can be limited by the cooperation of the guide limiting bump 21 and the guide limiting groove 22, the push rod 16 is prevented from being stuck, the end of the guide limiting groove 22 is in a closed state, and when the push rod 16 moves to the end of the guide limiting groove 22, the guide limiting bump abuts against the side wall at the end of the guide limiting groove 22, so that the push rod 16 is limited, and the push rod 16 is prevented from moving excessively and being separated from the mounting hole 17.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.