High-flexibility shielding robot cable

Abstract

The utility model discloses a high-flexibility shielding robot cable, which belongs to the technical field of cables and comprises a conductor, an insulating layer, an inner protective layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside. The insulating layer comprises an inner insulating layer, a slip layer and an outer insulating layer, the elongation of the outer insulating layer is larger than or equal to 200%, the volume resistivity of the outer insulating layer 23 is larger than or equal to 0.1 omega.cm, the shielding effectiveness of the outer insulating layer is larger than or equal to 40 dB, and the friction coefficient of the slip layer is smaller than or equal to 0.3. The insulating layer is divided into the inner insulating layer and the outer insulating layer, and the inner insulating layer is in contact with the conductor to stabilize the conductor and can slide relative to the outer insulating layer locally through the sliding layer, so that the conductor is isolated from the outer insulating layer, and partial acting force transmission is blocked. The outer insulating layer has a relatively high elongation rate on the basis of realizing an insulating and shielding function, so that the cable core has high flexibility and easy bending performance, and the influence of a bending effect on the conductor is reduced at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, in particular to a high-flexibility shielded robot cable. Background Art

[0002] With the rapid development of industrial intelligence, more and more industrial robots are beginning to engage in some dangerous, repetitive and heavy work, such as high-salinity industrial areas and coastal chemical plants, oil and gas offshore platform construction, shipyard drilling platform exploration and construction, etc. The replacement of these tasks by robots can reduce the workload and danger of the staff, and at the same time, enable these tasks to be carried out better and more efficiently.

[0003] The robot cannot do without important power and signal sources during its work. Cables are the power and signal transmission channels for the robot. Therefore, the properties of the cables must also adapt to the working environment of the robot. They need to be super wear-resistant, corrosion-resistant, and highly anti-interference, and highly flexible and easy to bend. They are widely used in special control connections with extremely high signal transmission requirements, and are frequently moved and used in environments with extremely high special transmission requirements to extend their service life.

[0004] When robots are working underwater or exploring for oil and gas, the most common problems they face are the impact of corrosion, chemicals, high salinity, etc. on cables and robots. In terms of cables, when facing these problems, armor layers are usually designed on the cables to resist corrosion and high temperatures. However, the armor layers not only increase the weight of the cables, but are also prone to deformation once they are hit or squeezed by the outside world, thus affecting the performance of the cables. At the same time, it is difficult to meet the high flexibility requirements of robots. Utility Model Content

[0005] The utility model aims to provide a high-flexibility shielded robot cable to solve the above-mentioned problems in the prior art.

[0006] The conductor, the insulating layer, the inner sheath, the shielding layer and the sheath layer are sequentially arranged from the inside to the outside, the insulating layer is coated on the outside of the conductor to form a cable core unit, a plurality of cable core units are twisted together to form a cable core, the shielding layer and the sheath layer are sequentially sleeved on the outer periphery of the cable core, and the inner sheath is filled between the cable core and the shielding layer;

[0007] The insulating layer comprises an inner insulating layer, a slip layer and an outer insulating layer, the elongation of the outer insulating layer is ≥200%, the volume resistivity of the outer insulating layer is ≥0.1Ω·cm, the shielding effectiveness of the outer insulating layer is ≥40dB, and the friction coefficient of the slip layer is ≤0.3.

[0008] As a further solution of the utility model: the friction coefficient of the sliding layer is ≤0.15.

[0009] As a further solution of the utility model: the material used for the outer insulating layer is one of copper braided mesh, conductive silicone rubber, conductive polyurethane, conductive EPDM rubber, conductive chloroprene rubber or conductive thermoplastic elastomer. The copper braided mesh can be specifically tinned copper braided mesh. In addition to having basic properties such as high insulation performance and shielding performance, the outer insulating layer also needs to have good ductility to improve the flexibility and bending ability of the cable core and ensure that the cable can adapt to various morphological changes.

[0010] As a further solution of the utility model: the material used for the inner insulating layer is one of a ceramic fiber woven mesh and a glass fiber woven mesh. Since the material used for the slip layer is an organic material or an inorganic-organic composite material, the heat resistance is relatively low, so the inner insulating layer needs to have a certain heat insulation capacity to ensure that the properties of the slip layer remain unchanged. At the same time, the above material also has good electrical insulation and shielding properties.

[0011] As a further solution of the utility model: the conductor adopts Category 5 mobile tinned copper conductor, so that the conductor can be used in an environment requiring high flexibility and durability.

[0012] As a further solution of the utility model: the middle gap of the cable core is filled with polyester rope to make it round. The polyester rope is used to make the cross-sectional shape of the cable as close to a circle as possible, and the filling makes the cross-sectional shape of the cable more round, which can increase the overall mechanical strength and stability of the cable.

[0013] As a further solution of the utility model: the shielding layer is woven from tinned copper conductors to improve the overall shielding performance and corrosion resistance of the cable and provide the cable with additional tensile strength and wear resistance.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The insulation layer is divided into two parts: the inner insulation layer and the outer insulation layer. The inner insulation layer contacts the conductor to stabilize the conductor and can slide relatively with the outer insulation layer locally through the slip layer, so as to isolate the conductor from the outer insulation layer and block the transmission of some forces. The outer insulation layer has a strong elongation rate on the basis of realizing the insulation shielding function, so that the cable core has high flexibility and easy bending performance while reducing the impact of bending on the conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional structure diagram of a highly flexible shielded robot cable.

[0018] In the figure: 1. conductor; 2. insulation layer; 21. inner insulation layer; 22. slip layer; 23. outer insulation layer; 3. inner protective layer; 4. shielding layer; 5. sheath layer; 6. polyester rope. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0020] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0021] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0022] See also Figure 1 As shown, in the embodiment of the utility model, a highly flexible shielded robot cable comprises a conductor 1, an insulating layer 2, an inner sheath 3, a shielding layer 4 and a sheath 5 arranged in sequence from the inside to the outside, the insulating layer 2 is coated on the outside of the conductor 1 to form a cable core unit, a plurality of cable core units are twisted together to form a cable core, the shielding layer 4 and the sheath 5 are sequentially sleeved on the outer periphery of the cable core, and the inner sheath 3 is filled between the cable core and the shielding layer 4. The insulating layer 2 comprises an inner insulating layer 21, a sliding layer 22 and an outer insulating layer 23, the elongation of the outer insulating layer 23 is ≥200%, the volume resistivity of the outer insulating layer 23 is ≥0.1Ω·cm, the shielding effectiveness of the outer insulating layer 23 is ≥40dB, and the friction coefficient of the sliding layer 22 is ≤0.3.

[0023] The inner insulating layer 21 and the conductor 1 are attached to each other and remain relatively stable. The inner insulating layer 21 provides mechanical and insulating protection for the conductor 1. The elongation of the outer insulating layer 23 is ≥200%, so that the outer insulating layer 23 has high ductility. When the outer insulating layer 23 is extended, the extended part of the outer insulating layer 23 and the attached part of the inner insulating layer 21 slide relative to each other through the slip layer 22, so that when the conductor 1 is bent under the drive of the outer insulating layer 23, the synchronous extension of the conductor 1 is reduced, the disturbance of the conductor 1 is reduced, and the service life of the conductor 1 is increased. The inner sheath 3 serves as a filling layer between the cable core and the shielding layer 4, and cooperates with the sheath layer 5 to provide the main mechanical properties and corrosion resistance of the cable, and can be made of polyurethane material. The shielding layer 4 is used to improve the shielding performance of the cable and reduce the interference of external electromagnetics on the cable.

[0024] The material used for the outer insulating layer 23 is one of copper braided mesh, tinned copper braided mesh, conductive silicone rubber, conductive polyurethane, conductive EPDM rubber, conductive chloroprene rubber or conductive thermoplastic elastomer. In addition to having basic properties such as high insulation performance and shielding performance, the above materials also have good ductility to improve the flexibility and bending ability of the cable core and ensure that the cable can adapt to various morphological changes.

[0025] The sliding layer 22 can be made of a metal layer or other coatings with a low friction coefficient, such as molybdenum disulfide coating, tungsten carbide coating, aluminum titanium nitride coating, etc. It has a very small friction coefficient and wear resistance, and can be well attached to and move relative to the outer insulating layer 23. In addition, the sliding layer 22 also has good heat resistance and can maintain its own properties unchanged at the operating temperature of conventional cables.

[0026] The material used for the inner insulating layer 21 is one of a ceramic fiber woven mesh and a glass fiber woven mesh. Since the material used for the slip layer 22 is an organic material or an inorganic-organic composite material with low heat resistance, the inner insulating layer 21 is required to have a certain heat insulation ability to ensure that the properties of the slip layer 22 remain unchanged. In small-diameter cables, since the current intensity is low and the heat generation rate is low, there is no need to perform heat dissipation treatment on the conductor 1. In large-diameter cables, if the inner insulating layer 21 uses a heat-insulating material, the conductor 1 needs to be heat-dissipated separately. A common method is to pass a cooling pipe through the inside of the conductor 1 and transport coolant to dissipate heat, thereby protecting both the conductor 1 and the slip layer 22.

[0027] Conductor 1 uses Category 5 mobile tinned copper conductors. Mobile cable conductors are designed for use in dynamic environments. They are highly flexible and durable and are suitable for robots, cable drag chain systems, and other applications that require frequent movement or bending. Tinned copper conductors provide stable electrical performance. The tin coating prevents copper oxidation and extends the life of the cable. The high flexibility makes it suitable for mobile and dynamic applications and can withstand frequent bending and twisting.

[0028] The middle gap of the cable core is filled and rounded with polyester rope 6, which is flexible and has strong tensile strength, can increase the overall structural stability of the cable, and the uniform cross-sectional shape helps to maintain uniform distribution between the conductors 1 and reduce electrical non-uniformity and electromagnetic interference.

[0029] The shielding layer 4 is woven with tinned copper conductors. The tinned copper braided shielding layer 4 can effectively shield electromagnetic interference and radio frequency interference inside and outside the cable; provide additional mechanical protection, increase the tensile strength and wear resistance of the cable, and is suitable for cables that need to be moved frequently or exposed to harsh environments; the tinned copper braid has good corrosion resistance and is suitable for use in high humidity and corrosive environments.

[0030] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A highly flexible shielded robot cable, characterized in that: include: A conductor (1), an insulating layer (2), an inner protective layer (3), a shielding layer (4) and a sheath layer (5) are sequentially arranged from the inside to the outside, the insulating layer (2) is coated on the outside of the conductor (1) to form a cable core unit, a plurality of cable core units are twisted together to form a cable core, the shielding layer (4) and the sheath layer (5) are sequentially sleeved on the outer periphery of the cable core, and the inner protective layer (3) is filled between the cable core and the shielding layer (4); The insulating layer (2) comprises an inner insulating layer (21), a slip layer (22) and an outer insulating layer (23); the elongation of the outer insulating layer (23) is ≥200%, the volume resistivity of the outer insulating layer (23) is ≥0.1Ω·cm, the shielding effectiveness of the outer insulating layer (23) is ≥40dB, and the friction coefficient of the slip layer (22) is ≤0.

3.

2. A highly flexible shielded robot cable according to claim 1, characterized in that: The material used for the outer insulating layer (23) is one of copper braided mesh, conductive silicone rubber, conductive polyurethane, conductive EPDM rubber, conductive chloroprene rubber or conductive thermoplastic elastomer.

3. A highly flexible shielded robot cable according to claim 1, characterized in that: The material used for the inner insulating layer (21) is one of a ceramic fiber woven mesh and a glass fiber woven mesh.

4. A highly flexible shielded robot cable according to claim 1, characterized in that: The conductor (1) is a Category 5 mobile tinned copper conductor.

5. The highly flexible shielded robot cable according to claim 1, characterized in that: The middle gap of the cable core is filled and rounded with a polyester rope (6).

6. The highly flexible shielded robot cable according to claim 1, characterized in that: The shielding layer (4) is braided with tinned copper conductors.

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