Moisture-proof multi-core control cable easy to strip

Abstract

The utility model discloses a moistureproof easy-to-strip multi-core control cable, comprising two power wire cores and two control wire cores which are arranged in a cross shape and are twisted together to form a cable core, each control wire core is formed by pair twisting of two signal wires, and the twisting pitch of the control wire cores is 20-60 times of the external diameter of the signal wires. The connecting line of the axes of the two signal wires of one control wire core is parallel to the connecting line of the axes of the two power wire cores, the connecting line of the axes of the two signal wires of the other control wire core is perpendicular to the connecting line of the axes of the two power wire cores, and the cable core is sequentially coated with a TPU extruded inner sheath layer, a TPU extruded outer sheath layer and an EVA wear-resistant outer sheath layer. Talcum powder is filled between the cable core and the TPU extruded inner sheath layer, and the cable core and the TPU extruded inner sheath layer are tightly connected. The cable is better in moisture-proof and water-blocking performance, the stable electrical characteristics of the cable are ensured, the difficulty and labor intensity of manual wire stripping operation are reduced, and the quality of a manual wire stripping process is improved.

Description

Technical Field

[0001] This application belongs to the technical field of cables, and particularly relates to a moisture-proof and easy-to-strip multi-core control cable. Background Art

[0002] The cable core inside a control cable usually contains power cores and control cores. When installing and maintaining, manual peeling operations are required. The sheath and the cable core are tightly combined for a long time and adhere to each other. When manually peeling and tearing, it is easy to cause unexpected damage to the sheath and the internal cores. The operation is difficult, with high requirements for the proficiency of manual peeling, and high labor intensity for the operators. Moreover, the gap formed between the sheath and the cable core is easy to invade water vapor, resulting in moisture ingress. The insulation layers of each core are easily damaged, reducing the electrical characteristics of the cable, affecting normal use, and posing potential safety hazards. Utility Model Content

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by this application is to provide a moisture-proof and easy-to-strip multi-core control cable, which has better moisture-proof and water-blocking performance, ensures stable electrical characteristics of the cable, reduces the difficulty and labor intensity of manual peeling operations, and helps to improve the quality of the manual peeling process.

[0004] The above technical problems are solved by the following technical solutions in this application.

[0005] A moisture-proof and easy-to-strip multi-core control cable includes two power cores and two control cores arranged in a cross shape and jointly stranded to form a cable core. The lay length of the cable core is 10 to 25 times the outer diameter of the cable core. The outer diameter of the power core is 1.6 mm to 3 mm. The control core is composed of two signal lines twisted together. The outer diameter of the signal line is 1 mm to 2 mm. The lay length of the control core is 20 to 60 times the outer diameter of the signal line. The axial connection line of the two signal lines of one control core is parallel to the axial connection line of the two power cores, and the axial connection line of the two signal lines of the other control core is perpendicular to the axial connection line of the two power cores. The cable core is successively coated with a TPU extruded inner sheath layer, a TPU extruded outer sheath layer, and an EVA wear-resistant outer skin layer. Talcum powder is filled between the cable core and the TPU extruded inner sheath layer and is closely connected.

[0006] Preferably, the power core includes a power core conductor and an irradiated cross-linked low-density polyethylene insulation layer.

[0007] Preferably, the power core conductor is composed of several tinned copper wires with a wire diameter of 0.05 mm to 0.1 mm concentrically stranded.

[0008] Preferably, the thickness of the irradiated cross-linked low-density polyethylene insulation layer is 0.1 mm to 0.5 mm.

[0009] Preferably, the signal line includes an inner conductor and an XLPE insulating layer.

[0010] Preferably, the inner conductor is formed by concentrically stranding a plurality of tinned copper single wires with a wire diameter of 0.02 mm to 0.04 mm.

[0011] Preferably, the thickness of the XLPE insulating layer is 0.1 mm to 0.3 mm.

[0012] Preferably, the thickness of the EVA wear-resistant outer skin layer is 0.1 mm to 0.3 mm.

[0013] Preferably, the thickness of the TPU extruded inner sheath layer is not less than 1 mm.

[0014] Preferably, the thickness of the TPU extruded outer sheath layer is 0.45 mm to 2 mm.

[0015] Advantages of the present application:

[0016] 1. Remove the original binding layer outside the cable core to form an inner and outer double sheath layer structure. Fill talcum powder between the inner sheath layer and the cable core and directly fit them tightly to eliminate voids, avoid water vapor intrusion, achieve excellent moisture-proof and water-blocking performance, effectively prevent the cable from being affected by moisture and water ingress, ensure the stable and reliable electrical characteristics of the cable during long-term use, reduce potential safety hazards, and extend the service life. At the same time, the addition of talcum powder helps to eliminate adhesion, greatly reduces the difficulty of manual peeling operation, has a high manual peeling operation efficiency, helps to improve the quality of the manual wire stripping process, and ensures the stable and reliable electrical characteristics of the cable.

[0017] 2. By arranging the axis connection line of the two signal lines of one control core parallel to the axis connection line of the two power cores, and arranging the axis connection line of the two signal lines of the other control core perpendicular to the axis connection line of the two power cores, it is beneficial to the preparation of the fine diameter of the stranded cable. The added talcum powder reduces the friction resistance, improves the flexibility and bending resistance of the cable, and ensures the stability and balance of the cable core structure.

[0018] 3. The TPU extruded outer sheath layer is coated with an EVA wear-resistant outer skin layer, which effectively improves the wear resistance of the cable outer skin, inhibits wear, and extends the service life. Description of the Drawings

[0019] Figure 1 It is a cross-sectional structure schematic diagram of an embodiment of the present application.

[0020] Description of the reference numerals:

[0021] 1 - Power core, 2 - Control core, 3 - Signal line, 4 - TPU extruded inner sheath layer, 5 - TPU extruded outer sheath layer, 6 - EVA wear-resistant outer skin layer, 7 - Power core conductor, 8 - Irradiation cross-linked low-density polyethylene insulation layer, 9 - Inner conductor, 10 - XLPE insulation layer. Detailed implementation

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0023] See Figure 1 , the moisture-proof and easy-to-strip multi-core control cable of the embodiments of the present application includes two power cores 1 and two control cores 2 arranged in a cross shape and jointly stranded to form a cable core. The stranding pitch of the cable core is 10 to 25 times the outer diameter of the cable core. The outer diameter of the power core 1 is 1.6 mm to 3 mm. Specifically, the power core 1 includes a power core conductor 7 and an irradiation cross-linked low-density polyethylene insulation layer 8. Further, the power core conductor 7 is formed by concentrically stranding a plurality of tinned copper wires with a wire diameter of 0.05 mm to 0.1 mm. The thickness of the irradiation cross-linked low-density polyethylene insulation layer 8 is 0.1 mm to 0.5 mm. The control core 2 is formed by twisting two signal lines 3 in pairs. Specifically, the signal line 3 includes an inner conductor 9 and an XLPE insulation layer 10. Further, the inner conductor 9 is formed by concentrically stranding a plurality of tinned copper single wires with a wire diameter of 0.02 mm to 0.04 mm. The thickness of the XLPE insulation layer 10 is 0.1 mm to 0.3 mm. The outer diameter of the signal line 3 is 1 mm to 2 mm. The stranding pitch of the control core 2 is 20 to 60 times the outer diameter of the signal line 3. The axial connection line of the two signal lines 3 of one control core 2 and the axial connection line of the two power cores 1 are arranged in parallel, and the axial connection line of the two signal lines 3 of the other control core 2 and the axial connection line of the two power cores 1 are arranged perpendicular to each other.

[0024] The cable core is sequentially coated with a TPU extruded inner sheath layer 4, a TPU extruded outer sheath layer 5 and an EVA wear-resistant outer skin layer 6. Talcum powder is filled between the cable core and the TPU extruded inner sheath layer 4 and they are closely connected. The thickness of the TPU extruded inner sheath layer 4 is not less than 1 mm. The thickness of the TPU extruded outer sheath layer 5 is 0.45 mm to 2 mm. The thickness of the EVA wear-resistant outer skin layer 6 is 0.1 mm to 0.3 mm.

[0025] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to cover these changes and modifications.

Claims

1. Moisture-proof and easy-to-strip multi-core control cable, its characteristics are: The invention comprises two power cores (1) and two control cores (2) arranged in a cross shape and twisted together to form a cable core, wherein the cable core twisting pitch is 10 to 25 times the outer diameter of the cable core, the outer diameter of the power core (1) is 1.6 mm to 3 mm, the control core (2) is formed by two signal lines (3) twisted in pairs, the outer diameter of the signal line (3) is 1 mm to 2 mm, the twisting pitch of the control core (2) is 20 to 60 times the outer diameter of the signal line (3), and the outer diameter of one control core (2) is 1.6 mm to 3 mm. The axis connecting lines of the two signal lines (3) are arranged in parallel with the axis connecting lines of the two power line cores (1); the axis connecting lines of the two signal lines (3) of another control line core (2) are arranged vertically with the axis connecting lines of the two power line cores (1); the outside of the cable core is sequentially coated with a TPU extruded inner sheath layer (4), a TPU extruded outer sheath layer (5) and an EVA wear-resistant outer skin layer (6); talcum powder is filled between the cable core and the TPU extruded inner sheath layer (4) and the cable core and the cable core and the TPU extruded inner sheath layer (4) are tightly connected.

2. The moisture-proof and easy-to-strip multi-core control cable according to claim 1 is characterized by: The power line core (1) comprises a power line core conductor (7) and a radiation cross-linked low-density polyethylene insulation layer (8).

3. The moisture-proof and easy-to-strip multi-core control cable according to claim 2 is characterized by: The power line core conductor (7) is composed of a plurality of tinned copper wires with a wire diameter of 0.05 mm to 0.1 mm, which are coaxially twisted.

4. The moisture-proof and easy-to-strip multi-core control cable according to claim 2 is characterized by: The thickness of the radiation cross-linked low-density polyethylene insulation layer (8) is 0.1 mm to 0.5 mm.

5. The moisture-proof and easy-to-strip multi-core control cable according to claim 1 is characterized by: The signal line (3) comprises an inner conductor (9) and an XLPE insulation layer (10).

6. The moisture-proof and easy-to-strip multi-core control cable according to claim 5 is characterized by: 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, which are coaxially twisted.

7. The moisture-proof and easy-to-strip multi-core control cable according to claim 5 is characterized by: The thickness of the XLPE insulation layer (10) is 0.1 mm to 0.3 mm.

8. The moisture-proof and easy-to-strip multi-core control cable according to claim 1 is characterized by: The thickness of the EVA wear-resistant outer skin layer (6) is 0.1 mm to 0.3 mm.

9. The moisture-proof and easy-to-strip multi-core control cable according to claim 1 is characterized by: The thickness of the TPU extruded inner sheath layer (4) is not less than 1 mm.

10. The moisture-proof and easy-to-strip multi-core control cable according to claim 1 is characterized by: The thickness of the TPU extruded outer sheath layer (5) is 0.45 mm to 2 mm.

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