Bending-resistant total shielding control cable

Abstract

The utility model discloses a bending-resistant total shielding control cable, which comprises a control wire core, five power wire cores and a polyester staple fiber buffer core material which are twisted together to form a cable core, and a PET (Polyethylene Terephthalate) resin wrapping layer, a tinned annealed copper wire wrapping total shielding layer and an irradiation crosslinking linear low-density polyethylene extruded outer sheath layer are sequentially coated outside the cable core. The tinned annealed copper wire wrapping total shielding layer is formed by unidirectionally and spirally winding two tinned annealed copper wires with different wire diameters smaller than 0.1 mm, the thickness of the tinned annealed copper wire wrapping total shielding layer is not smaller than 4 times of the wire diameter of the tinned annealed copper wire, the winding distance of the tinned annealed copper wire is 8-25 times of the wire diameter of the tinned annealed copper wire, the winding distance of the tinned annealed copper wire is larger than that of the PET resin wrapping layer, and the thickness of the tinned annealed copper wire wrapping total shielding layer is larger than that of the PET resin wrapping layer. A gap is formed between the total shielding layer and the outer sheath layer. The cable is better in bending resistance, the total shielding layer is not prone to wire breakage, stable signal interference resistance is guaranteed, noise resistance is better, and durability and applicability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and more specifically, to a bend-resistant overall shield control cable. Background Art

[0002] On an automated industrial production line, multi-core cables are often used in robots, mobile drive systems, etc. The multi-core cables need to have good flexibility and shielding performance, and must also ensure good electrical characteristics for long-distance transmission. Usually, the control cable has the control cores and power cores stranded in the same layer, and an overall shield layer is wrapped around the cable core. The bend resistance is poor. In a normal working environment, the cable undergoes repeated torsional bending, and local stress concentration is likely to occur in the overall shield layer, resulting in broken wires and filaments, a significant reduction in the anti-signal interference ability, poor noise resistance, greatly affecting the electrical characteristics of the cable, and not being durable for application. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a bend-resistant overall shield control cable, which has better bend resistance, is not prone to broken wires and filaments in the overall shield layer, ensures stable anti-signal interference performance, has better noise resistance, and improves the durability and applicability.

[0004] The above technical problem is solved by the following technical solutions of the utility model.

[0005] The bend-resistant overall shield control cable includes a control core, five power cores and a polyester staple fiber buffer core material stranded together to form a cable core. The cable core is sequentially coated with a PET resin wrapping layer, a tinned soft copper wire wrapped overall shield layer and an irradiated cross-linked linear low-density polyethylene extruded outer sheath layer. The control core is formed by untwisting and stranding two insulated cores. The stranding direction of the insulated core is the same as the stranding direction of the cable core and the winding direction of the PET resin wrapping layer. The tinned soft copper wire wrapped overall shield layer is formed by single-direction spiral winding of two tinned soft copper wires with different wire diameters both less than 0.1 mm. The thickness of the tinned soft copper wire wrapped overall shield layer is not less than 4 times the wire diameter of the tinned soft copper wire. The pitch of the tinned soft copper wire is 8 to 25 times the wire diameter of the tinned soft copper wire. The pitch of the tinned soft copper wire is greater than the pitch of the PET resin wrapping layer. A gap is formed between the tinned soft copper wire wrapped overall shield layer and the irradiated cross-linked linear low-density polyethylene extruded outer sheath layer. The outer diameter of the irradiated cross-linked linear low-density polyethylene extruded outer sheath layer is 6.5 mm to 8 mm.

[0006] Preferably, the wire diameter of the tinned soft copper wire is 0.05 mm to 0.08 mm.

[0007] Preferably, the stranding pitch of the control core is 6 mm to 10 mm.

[0008] Preferably, the insulated conductor core comprises an inner conductor and an XLPE insulation layer.

[0009] Preferably, the inner conductor is composed of a plurality of tinned copper single wires with a wire diameter of 0.02 mm to 0.04 mm stranded together.

[0010] Preferably, the power conductor core comprises a power conductor core conductor and an irradiated cross-linked low-density polyethylene insulation layer, and the outer diameter of the power conductor core does not exceed 80% of the outer diameter of the insulated conductor core.

[0011] Preferably, the power conductor core conductor is composed of a plurality of tinned copper single wires with a wire diameter of 0.05 mm to 0.08 mm stranded together.

[0012] Preferably, the shielding density of the overall shielding layer wrapped with tinned soft copper wire is not less than 95%.

[0013] Preferably, the thickness of the overall shielding layer wrapped with tinned soft copper wire is 5 to 10 times the wire diameter of the tinned soft copper wire.

[0014] Preferably, the PET resin wrapping layer is a spiral overlapping wrapping structure with PET resin tape, and the overlapping width of the PET resin tape is one-fourth to one-third of the tape width.

[0015] Advantages of the present utility model:

[0016] 1. The overall shielding layer is composed of two tinned soft copper wires with different wire diameters, both of which are less than 0.1 mm, wound in a single-direction spiral. This is beneficial to improving flexibility and bending resistance. The thickness of the overall shielding layer is not less than 4 times the wire diameter of the tinned soft copper wire, taking into account both maintaining the mechanical strength and flexibility of the shielding layer. The pitch of the tinned soft copper wire is 8 to 25 times the wire diameter of the tinned soft copper wire, which is beneficial to reducing the torque force, maintaining the close winding between the tinned soft copper wires, and ensuring stable shielding characteristics. The pitch of the tinned soft copper wire is greater than the pitch of the PET resin wrapping layer, and the outer sheath is an extrusion structure, which helps to prevent the loosening of the overall shielding layer. There is a gap between the overall shielding layer and the outer sheath layer, providing an appropriate bending allowance for the tinned soft copper wire when the cable is bent, dispersing and reducing the bending force on the tinned soft copper wire, inhibiting wire breakage, and having better bending resistance, thus improving the durability and application performance.

[0017] 2. By evenly distributing the control conductor core and five power conductor cores and jointly stranding them with a polyester staple fiber buffer core material to form a cable core, the cable core is round, the structure is more balanced and stable, and the mechanical strength is better, which helps to improve the bending resistance performance. The polyester staple fiber buffer core material absorbs energy. When the cable undergoes repeated bending actions, it helps to slow down the extrusion force and lateral pressure, helps to disperse and reduce the bending force on the overall shielding layer, reduce local stress concentration, inhibit wire breakage of each conductor core and the overall shielding layer, have better bending resistance performance, and improve the durability and application performance.

[0018] 3. By adding a PET resin wrapping layer between the cable core and the overall shielding layer, since PET has a higher conductivity and the winding direction of the PET resin wrapping layer is the same as the stranding direction of the cable core, during the bending operation, it is beneficial to suppress the loosening of the cable core, ensure a stable overlapping rate, improve the noise resistance, and have better durability. Brief Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present application.

[0021] In the figure: 1 - control cable core, 2 - power cable core, 3 - polyester staple fiber buffer core material, 4 - PET resin wrapping layer, 5 - tinned soft copper wire wrapped overall shielding layer, 6 - irradiated cross-linked linear low-density polyethylene extruded outer sheath layer, 7 - insulated cable core, 8 - gap, 9 - inner conductor, 10 - XLPE insulation layer, 11 - power cable core conductor, 12 - irradiated cross-linked low-density polyethylene insulation layer. Specific Embodiments

[0022] The following will further describe the present invention in detail through specific embodiments in combination with the drawings.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, in combination with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0024] Such as Figure 1, the bend-resistant total shield control cable of the embodiment of the present utility model includes a control core wire 1, five power core wires 2 and a polyester staple fiber buffer core material 3 which are jointly stranded to form a cable core. An outer side of the cable core is sequentially coated with a PET resin wrapping layer 4, a tinned soft copper wire wrapping total shield layer 5 and an irradiated cross-linked linear low-density polyethylene extrusion outer sheath layer 6. A gap 8 is formed between the tinned soft copper wire wrapping total shield layer 5 and the irradiated cross-linked linear low-density polyethylene extrusion outer sheath layer 6. An outer diameter of the irradiated cross-linked linear low-density polyethylene extrusion outer sheath layer 6 is 6.5 mm to 8 mm. In an embodiment, the PET resin wrapping layer 4 is a spiral overlapping wrapping structure of PET resin tapes, and an overlapping width of the PET resin tapes is one-fourth to one-third of a tape width. The tinned soft copper wire wrapping total shield layer 5 is formed by unidirectional spiral winding of two tinned soft copper wires with different wire diameters and both wire diameters being less than 0.1 mm. Further, a wire diameter of the tinned soft copper wire is 0.05 mm to 0.08 mm. A thickness of the tinned soft copper wire wrapping total shield layer 5 is not less than 4 times of the wire diameter of the tinned soft copper wire. Further, the thickness of the tinned soft copper wire wrapping total shield layer 5 is 5 to 10 times of the wire diameter of the tinned soft copper wire. A winding pitch of the tinned soft copper wire is 8 to 25 times of the wire diameter of the tinned soft copper wire. The winding pitch of the tinned soft copper wire is greater than a winding pitch of the PET resin wrapping layer 4. A shielding density of the tinned soft copper wire wrapping total shield layer 5 is not less than 95%.

[0025] The control core wire 1 is formed by untwisting and stranding two insulated core wires 7. Further, a stranding pitch of the control core wire 1 is 6 mm to 10 mm. A stranding direction of the insulated core wire 7 is the same as stranding directions of the cable core and the PET resin wrapping layer 4. In an embodiment, the insulated core wire 7 includes an inner conductor 9 and an XLPE insulating layer 10. Specifically, the inner conductor 9 is formed by stranding a plurality of tinned copper single wires with a wire diameter of 0.02 mm to 0.04 mm. In an embodiment, the power core wire 2 includes a power core wire conductor 11 and an irradiated cross-linked low-density polyethylene insulating layer 12. Specifically, the power core wire conductor 11 is formed by stranding a plurality of tinned copper single wires with a wire diameter of 0.05 mm to 0.08 mm. An outer diameter of the power core wire 2 does not exceed 80% of an outer diameter of the insulated core wire 7.

[0026] The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Bending resistant overall shielded control cable, characterized by: The invention comprises a control core (1) and five power cores (2) twisted together with a polyester staple fiber buffer core material (3) to form a cable core, wherein the cable core is coated with a PET resin wrapping layer (4), a tinned soft copper wire wrapping overall shielding layer (5) and an irradiated cross-linked linear low-density polyethylene extruded outer sheath layer (6) in sequence, wherein the control core (1) is formed by two insulated cores (7) being twisted together, wherein the twisting direction of the insulated cores (7) is the same as the twisting direction of the cable core and the twisting direction of the PET resin wrapping layer (4), and the tinned soft copper wire wrapping overall shielding layer (5) is of two different wire diameters, both of which are smaller than 1 / 4. The tinned soft copper wire is formed by unidirectional spiral winding of 0.1mm, the thickness of the total shielding layer (5) of the tinned soft copper wire is not less than 4 times the wire diameter of the tinned soft copper wire, the winding distance of the tinned soft copper wire is 8 to 25 times the wire diameter of the tinned soft copper wire, the winding distance of the tinned soft copper wire is greater than the winding distance of the PET resin winding layer (4), a gap (8) is formed between the total shielding layer (5) of the tinned soft copper wire and the radiation cross-linked linear low-density polyethylene extruded outer sheath layer (6), and the outer diameter of the radiation cross-linked linear low-density polyethylene extruded outer sheath layer (6) is 6.5mm to 8mm.

2. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The diameter of the tinned soft copper wire is 0.05 mm to 0.08 mm.

3. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The control wire core (1) has a twisting pitch of 6 mm to 10 mm.

4. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The insulated wire core (7) comprises an inner conductor (9) and an XLPE insulation layer (10).

5. The bending-resistant overall shielded control cable according to claim 4 is characterized in that: The inner conductor (9) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.02 mm to 0.04 mm twisted together.

6. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The power line core (2) comprises a power line core conductor (11) and a radiation cross-linked low-density polyethylene insulation layer (12); the outer diameter of the power line core (2) does not exceed 80% of the outer diameter of the insulation line core (7).

7. The bending-resistant overall shielded control cable according to claim 6 is characterized in that: The power line core conductor (11) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm twisted together.

8. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The shielding density of the total shielding layer (5) wrapped with tinned soft copper wire is not less than 95%.

9. The bending-resistant overall shielded control cable according to claim 1 is characterized in that: The thickness of the total shielding layer (5) wrapped around the tinned soft copper wire is 5 to 10 times the wire diameter of the tinned soft copper wire.

10. The bending-resistant overall shielded control cable according to claim 1, characterized in that: The PET resin wrapping layer (4) is a PET resin tape spirally overlapped wrapping structure, and the overlapping width of the PET resin tape is one quarter to one third of the tape width.

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