CN212010419U

CN212010419U - Low-temperature-resistant flexible cable for oil platform

Info

Publication number: CN212010419U
Application number: CN202020735421.XU
Authority: CN
Inventors: 卫继周; 张伟伟; 王春华
Original assignee: Shanghai Jinfeng Cable Co ltd
Current assignee: Shanghai Jinfeng Cable Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-11-24
Anticipated expiration: 2030-05-07

Abstract

The utility model provides a low temperature resistant flexible cable for an oil platform, which comprises a conductor, an insulator, a shield and a sheath layer from inside to outside in sequence; the conductor is a copper conductor, and the change ratio of the pitch of the inner layer and the pitch of the outer layer of the copper conductor is synchronous and is twisted in the same direction; the insulator is made of a dynamic cross-linked rubber material; the shielding body is a metal shielding body; the sheath layer is made of thermoplastic polyurethane. The cable is suitable for the working of an oil platform in an extremely cold environment, and can meet the requirement of easy bending and laying of the cable in an environment of-50 ℃ to +90 ℃ under a complex working condition.

Description

Low-temperature-resistant flexible cable for oil platform

Technical Field

The utility model relates to an oil development technical field specifically, relates to an oil platform is with low temperature resistant cable of easily bending down.

Background

With the increasing shortage of global oil and natural gas energy, global oil exploitation is gradually changed from an easy-to-exploit place to an extremely cold place, so that the requirement of an oil platform for working in the extremely cold environment is increased continuously, a large amount of flexible cables suitable for low temperature resistance are needed for newly building and maintaining the oil platform, and research and development and production of related oil platform cables are driven. The oil platform cable working in extreme cold is affected by cold weather for a long time, the installation and the laying of the cable in extreme cold are seriously affected, the cable cannot be bent normally particularly during installation at low temperature, the cable is easy to bend, crack and damage by adopting a forced bending means, and the conventional plastic and rubber materials cannot meet the requirement of flexible performance at low temperature at present.

Patent document CN202976943U discloses a cable, in which a cable core composed of a layer of nitrile polyethylene insulating layer is arranged outside 7 strands of 0.2mm tin-plated copper bundle wire conductors, polypropylene filler is added to the four cable cores to form a cable, and a copper tape shielding layer with a width of 20mm, a thickness of 0.5mm, three 0.5mm tin-plated copper wire ground wires are sequentially wound outside the cable core, an inner sheath is extruded, an armor layer composed of a layer of 1.0mm zinc-plated steel wire is woven, and a nitrile polyethylene outer sheath with a temperature resistance is wrapped. The cable is wrapped with the nitrile-butadiene polyethylene insulating layer by adopting the tin-plated copper bundle wires, and the nitrile-butadiene polyethylene has a heat preservation effect which is not as good as that of polyurethane, so that the cable cannot be applied to an extremely cold environment of oil exploitation.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing an oil platform is with low temperature resistant cable of easily buckling down.

According to the utility model provides a pair of oil platform is with low temperature resistant cable of yielding down, include: a metal conductor, a dynamically cross-linked rubber insulator, and a thermoplastic polyurethane jacket;

the dynamic cross-linked rubber insulator is wrapped and connected on the periphery of the metal conductor;

the thermoplastic polyurethane sheath is wrapped and connected on the periphery of the dynamic cross-linked rubber insulator.

Preferably, the low temperature resistant flexible cable for the oil platform further comprises a metal shield;

the metal shield is wrapped and connected to the periphery of the dynamic cross-linked rubber insulator;

the thermoplastic polyurethane sheath is wrapped and connected on the periphery of the metal shielding body.

Preferably, the oil platform cable capable of being bent easily at low temperature is characterized in that the dynamic cross-linked rubber insulator (2) is externally wrapped with a metal braid.

Preferably, the metal conductor is a copper conductor.

Preferably, the pitch of the inner layer of the copper conductor is synchronous with the pitch change ratio of the outer layer, and the copper conductor is twisted in the same direction.

Preferably, the copper conductor is a tinned copper wire.

Preferably, the tinned copper wire is a continuous-drawing continuous-stripping tinned copper wire with the diameter of 0.2 mm.

Preferably, the metal conductor is stranded by a plurality of strands of bundle wires firstly, then is stranded into a cable in a layered and multiple manner, the stranding direction and the multiple twisting direction are the same in the S direction, the change ratio of the inner layer pitch and the outer layer pitch is synchronous during the multiple twisting, the cable conductor is softer by the aid of the same-direction twisting, and the bending radius of the conductor is smaller than 6 times.

Preferably, the metal shield is a braided wire of 0.2-0.25mm diameter tinned monofilament, overlying the outer surface of the dynamically cross-linked rubber insulator.

Preferably, the tensile strength of the insulating material of the dynamic cross-linked rubber insulator is more than or equal to 20N/mm²The elongation at break is more than or equal to 500 percent; the thermoplastic polyurethane sheath is a thermoplastic polyurethane elastomer, and the tensile strength of the sheath material is more than or equal to 25N/mm²The elongation at break is more than or equal to 400 percent.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a cable is applicable to oil platform and works under extremely cold environment, can ensure under complicated operating mode that the cable is flexible under-50 ℃ - +90 ℃ environment and lays the requirement.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic diagram of a cable structure.

The figures show that: the cable comprises a metal conductor 1, a dynamic cross-linked rubber insulator 2, a metal shield 3 and a thermoplastic polyurethane sheath 4.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The cable structure adopts the materials of the ultra-fine copper conductor, TPV (dynamic cross-linked rubber), metal shield and TPU (polyurethane) sheath, and can meet the requirement of easy bending and laying of the cable under the environment of-50 ℃ to +90 ℃ under complex working conditions.

Example 1

The low-temperature-resistant flexible cable for the oil platform comprises a metal conductor 1, a metal shield 3, a dynamic cross-linked rubber insulator 2 and a thermoplastic polyurethane sheath 4; the dynamic cross-linked rubber insulator 2 is wrapped and connected on the periphery of the metal conductor 1; the metal shield 3 is wrapped and connected on the periphery of the dynamic cross-linked rubber insulator 2; the thermoplastic polyurethane sheath 4 is wrapped and connected on the periphery of the metal shielding body 3. In order to realize the low-temperature resistant and flexible cable for the oil platform, the dynamic cross-linked rubber insulator 2 is wrapped with a metal braid.

The metal conductor is a copper conductor, the copper conductor is a tinned copper wire, and the tinned copper wire is a continuous-drawing continuous-withdrawal tinned copper wire with the diameter of 0.2 mm. The inner layer pitch and the outer layer pitch of the copper conductor are synchronous in change ratio, and the copper conductors are twisted in the same direction. The metal conductor is stranded by a plurality of strands of bundle wires firstly and then is stranded into a cable layer by layer, the stranding direction and the stranding direction are the same in S direction, the change ratio of the inner layer pitch and the outer layer pitch is synchronous during the stranding, the cable conductor is softer by adopting the same-direction stranding, and the bending radius of the conductor is less than 6 times.

The metal shield is a tinned monofilament braid with a diameter of 0.2-0.25mm, and covers the outer surface of the dynamic cross-linked rubber insulator. The tensile strength of the insulating material of the dynamic cross-linked rubber insulator is more than or equal to 20N/mm²The elongation at break is more than or equal to 500 percent; the thermoplastic polyurethane sheath is a thermoplastic polyurethane elastomer, and the tensile strength of the sheath material is more than or equal to 25N/mm²The elongation at break is more than or equal to 400 percent.Practice of Example 2

As shown in fig. 1, the cable adopts a structure of a conductor, insulation, a metal shielding layer and an outer sheath, and the cable is a low-temperature-resistant flexible cable for an oil platform.

The copper conductor adopts continuous-drawing continuous-stripping tin-plated copper wires with the diameter of 0.2mm, the conductor adopts optimized twisting pitch, the change ratio of the inner layer pitch and the outer layer pitch is synchronous, the cable conductor is softer by adopting same-direction twisting, the outside of the cable conductor is made of dynamic cross-linked rubber material (TPV), the material can keep flexibility and has good elasticity at the low temperature of 50 ℃ below zero, a metal braid layer is added outside the insulation layer, so that the cable has better tensile resistance and flexibility when being bent, the electromagnetic interference resistance of the cable is greatly improved, the sheath adopts Thermoplastic Polyurethane (TPU), and the material can keep flexibility and has good elasticity at the low temperature of 50 ℃ below zero.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A low temperature resistant, flexible cable for use in an oil platform, comprising: a metal conductor (1), a dynamic cross-linked rubber insulator (2) and a thermoplastic polyurethane sheath (4);

the dynamic cross-linked rubber insulator (2) is wrapped and connected to the periphery of the metal conductor (1);

the thermoplastic polyurethane sheath (4) is wrapped and connected on the periphery of the dynamic cross-linked rubber insulator (2).

2. The low temperature resistant, flexible cable for oil platforms according to claim 1, further comprising a metal shield (3);

the metal shielding body (3) is wrapped and connected on the periphery of the dynamic cross-linked rubber insulator (2);

the thermoplastic polyurethane sheath (4) is wrapped and connected on the periphery of the metal shielding body (3).

3. The low temperature resistant and flexible cable for oil platforms as claimed in claim 1, wherein the dynamic cross-linked rubber insulator (2) is externally wrapped with a metal braid.

4. The low temperature resistant, flexible cable for oil platforms according to claim 1, characterized in that the metal conductor (1) is a copper conductor.

5. The low temperature resistant flexible cable for oil platforms as claimed in claim 4, wherein the pitch of the inner layer of the copper conductor is synchronized with the pitch of the outer layer, and the copper conductors are twisted in the same direction.

6. The low temperature resistant flexible cable for oil platforms as claimed in claim 4, wherein the copper conductor is tinned copper wire.

7. The low temperature resistant and flexible cable for the oil platform as claimed in claim 6, wherein the tinned copper wire is a continuous-drawing continuous-stripping tinned copper wire with a diameter of 0.2 mm.

8. The low-temperature-resistant and easily-bent cable for the oil platform as claimed in claim 1, wherein the metal conductor (1) is formed by stranding a plurality of strands of bundled wires firstly and then stranding the stranded wires layer by layer to form a cable, the stranding direction and the stranding direction are the same as the S direction, the change ratio of the inner layer pitch to the outer layer pitch is synchronous during stranding, and the cable conductor is softer by adopting the same-direction stranding, and the bending radius of the conductor is less than 6 times.

9. The low temperature resistant, flexible cable for oil platforms according to claim 1, characterized in that the metallic shield (3) is a braided of tinned monofilaments with a diameter of 0.2-0.25mm, which is coated on the outer surface of the dynamically cross-linked rubber insulation (2).

10. The low temperature resistant and flexible cable for the oil platform according to claim 1, wherein the tensile strength of the insulating material of the dynamic cross-linked rubber insulator (2) is not less than 20N/mm²The elongation at break is more than or equal to 500 percent;

the thermoplastic polyurethane sheath (4) is a thermoplastic polyurethane elastomer, and the tensile strength of the sheath material is more than or equal to 25N/mm²The elongation at break is more than or equal to 400 percent.