Water-blocking filling type anti-breakage sensor signal cable

Abstract

The utility model discloses a water-blocking filling type anti-breakage sensor signal cable, which comprises a cable core formed by twisting two power wire cores and two four-wire-group signal wire cores together, petroleum jelly is filled in a gap of the cable core, the outer diameter of each power wire core is larger than that of each four-wire-group signal wire core, each power wire core comprises a power wire core conductor and a PFA (Polyfluoroalkoxy) insulating layer, the four-wire-group signal wire core comprises a wire core body which is formed by twisting four signal wires and a para-position type wholly aromatic copolyamide stretched fiber core material together, and the wire core body is coated with a PTFE semi-directional belt inner wrapping antifriction layer. The cable core is sequentially coated with a PTFE semi-directional belt outer wrapping antifriction layer, an EVA water-blocking inner bonding layer, an aluminum-plastic composite belt longitudinal wrapping waterproof shielding layer, an EVA water-blocking outer bonding layer and an irradiation crosslinking high-density polyethylene outer sheath layer. The cable core structure is better in stability, wire and core breakage is inhibited, good moisture-proof and waterproof performance is achieved, potential safety hazards are reduced, and durability is improved.

Description

Technical Field

[0001] This application relates to the technical field of cables, and particularly to a water-blocking and filling type anti-breakage sensor signal cable. Background Art

[0002] Sensor signal cables are used for power supply in control systems, detection instruments, various sensors and other occasions, and for signal transmission of various sensors and instruments. In various complex electromagnetic environments, they need to have a stable and reliable noise shielding effect. Generally, the combination of a sensor signal cable has a power core and a signal core. The mechanical strength is weak, the core structure is easy to deform, and problems such as core stringing, wire breakage and core breakage often occur, and it does not have good moisture-proof and water-blocking performance, and the durability is poor. 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 water-blocking and filling type anti-breakage sensor signal cable, which has better core structure stability, inhibits the occurrence of wire breakage and core breakage, has good moisture-proof and waterproof performance, reduces potential safety hazards, and improves durability.

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

[0005] The water-blocking and filling type anti-breakage sensor signal cable includes two power cores and two four-wire group signal cores that are jointly stranded to form a core. The gap of the core is filled with petroleum jelly. The outer diameter of the power core is larger than the outer diameter of the four-wire group signal core. The power core includes a power core conductor and a PFA insulating layer. The power core conductor is composed of several stranded tinned copper wires. The four-wire group signal core includes four signal wires and a para-positioned wholly aromatic copolyamide drawn fiber core material that are jointly stranded to form a core body. The outside of the core body is coated with a PTFE semi-oriented tape inner wrapping anti-friction layer. The signal wire includes a solid annealed copper conductor and an irradiated cross-linked low-density polyethylene insulating layer. The diameter of the solid annealed copper conductor is 50% to 80% of the wire diameter of the tinned copper wire. The outside of the core is successively coated with a PTFE semi-oriented tape outer wrapping anti-friction layer, an EVA water-blocking inner bonding layer, an aluminum-plastic composite tape longitudinal wrapping waterproof shielding layer, an EVA water-blocking outer bonding layer, and an irradiated cross-linked high-density polyethylene outer sheath layer.

[0006] Preferably, the outer diameter of the four-wire group signal core is 60% to 80% of the outer diameter of the power core.

[0007] Preferably, both the PTFE semi-oriented tape inner wrapping anti-friction layer and the PTFE semi-oriented tape outer wrapping anti-friction layer are multi-layer PTFE semi-oriented tape overlapping wrapping structures with a thickness of 0.05 to 0.1 mm.

[0008] Preferably, the inner wrapped anti-friction layer of the PTFE semi-directional tape is wound in a direction opposite to the lay direction of the signal line, and the outer wrapped anti-friction layer of the PTFE semi-directional tape is wound in a direction opposite to the lay direction of the cable core.

[0009] Preferably, the signal wires of the two quad-group signal wire cores have the same twist direction and are opposite to the twist direction of the cable core.

[0010] Preferably, the signal wire lay lengths of the two quad-group signal wire cores are different.

[0011] Preferably, the aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer is an aluminum-plastic composite tape longitudinally overlapped wrapped structure, and the aluminum-plastic composite tape is formed by a composite of an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.

[0012] Preferably, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5, and the thickness of the aluminum foil layer is 30 μm to 150 μm.

[0013] Preferably, the signal line lay length is 10 to 20 times the outer diameter of the signal line.

[0014] Preferably, the thickness of the EVA water-blocking inner adhesive layer and the EVA water-blocking outer adhesive layer are both 3 μm to 10 μm.

[0015] Beneficial effects of this application:

[0016] 1. In the cable core structure, the outer diameter of the power core is larger than that of the quad signal core. The outer diameter of the quad signal core is further optimized to 60 to 80% of the outer diameter of the power core, which helps to alleviate the lateral pressure on the quad signal core with a smaller outer diameter, isolate the two quad signal cores, prevent cable core structure deformation and core stringing, and improve durability.

[0017] 2. The signal line is twisted with the para-type fully aromatic copolyamide stretched fiber core material, which helps to reduce the extrusion force and lateral pressure from the wire core and the cable core to maintain the circular cross-section structure of the wire core and the cable core, improve the bending resistance, and optimize the conductor structure and wire diameter ratio of the power core and the signal line. The power core conductor structure is twisted with tinned copper wire, and the signal line conductor structure is a solid annealed copper conductor. The diameter of the solid annealed copper conductor is 50% to 80% of the tinned copper wire diameter, which is beneficial to improve the bending resistance of the power core and the four-wire signal core combination cable, help to suppress core and wire breakage, and have better durability.

[0018] 3. By filling the cable core gap with petroleum jelly to prevent longitudinal water seepage and adopting the structure of longitudinally wrapping an aluminum-plastic composite tape for waterproof shielding, it can provide shielding coverage and prevent water vapor intrusion. The aluminum-plastic composite tape is formed by compounding an MDPE water-blocking inner layer, an aluminum foil layer, and an LDPE water-blocking outer layer, with better water-blocking characteristics. And an EVA water-blocking adhesive layer is added between adjacent layers of the PTFE semi-oriented tape outer wrapped with a friction-reducing layer, the aluminum-plastic composite tape longitudinally wrapped with a waterproof shielding layer, and the irradiated cross-linked high-density polyethylene outer sheath layer to enhance the barrier performance against water vapor diffusion, improve the moisture-proof and water-blocking characteristics of the cable, reduce potential safety hazards, and improve durability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 1 - power core, 2 - four-wire group signal core, 3 - petroleum jelly, 4 - power core conductor, 5 - PFA insulation layer, 6 - signal wire, 7 - para-positioned wholly aromatic copolyamide drawn fiber core material, 8 - PTFE semi-oriented tape inner wrapped with a friction-reducing layer, 9 - solid annealed copper conductor, 10 - irradiated cross-linked low-density polyethylene insulation layer, 11 - PTFE semi-oriented tape outer wrapped with a friction-reducing layer, 12 - EVA water-blocking inner adhesive layer, 13 - aluminum-plastic composite tape longitudinally wrapped with a waterproof shielding layer, 14 - EVA water-blocking outer adhesive layer, 15 - irradiated cross-linked high-density polyethylene outer sheath layer. SPECIFIC EMBODIMENTS

[0022] The terms used in the embodiments part of the present application are only for explaining the specific embodiments of the present application and are not intended to limit the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0023] See Figure 1, the water-blocking and filling type anti-breakage sensor signal cable of the embodiment of the present application includes two power line cores 1 and two four-wire group signal line cores 2 which are jointly stranded to form a cable core. The gap of the cable core is filled with petroleum jelly 3. The outer diameter of the power line core 1 is larger than that of the four-wire group signal line core 2. Further, the outer diameter of the four-wire group signal line core 2 is 60% to 80% of the outer diameter of the power line core 1. The power line core 1 includes a power line core conductor 4 and a PFA insulation layer 5. The power line core conductor 4 is formed by stranding a plurality of tinned copper wires. The four-wire group signal line core 2 includes four signal lines 6 and a para-positioned wholly aromatic copolyamide drawn fiber core material 7 which are jointly stranded to form a core body. Further, the lay length of the signal line 6 is 10 to 20 times the outer diameter of the signal line 6. The outside of the core body is coated with a PTFE semi-oriented tape inner wrapping anti-friction layer 8. The signal line 6 includes a solid annealed copper conductor 9 and an irradiated cross-linked low-density polyethylene insulation layer 10. The diameter of the solid annealed copper conductor 9 is 50% to 80% of the wire diameter of the tinned copper wire. Further, the lay directions of the signal lines 6 of the two four-wire group signal line cores 2 are the same and opposite to the lay direction of the cable core, and the lay lengths of the signal lines 6 of the two four-wire group signal line cores 2 are different.

[0024] The outside of the cable core is successively coated with a PTFE semi-oriented tape outer wrapping anti-friction layer 11, an EVA water-blocking inner bonding layer 12, an aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer 13, an EVA water-blocking outer bonding layer 14, and an irradiated cross-linked high-density polyethylene outer sheath layer 15. In one embodiment, both the PTFE semi-oriented tape inner wrapping anti-friction layer 8 and the PTFE semi-oriented tape outer wrapping anti-friction layer 11 are multi-layer PTFE semi-oriented tape overlapping wrapping structures with a thickness of 0.05 to 0.1 mm. Further, the wrapping direction of the PTFE semi-oriented tape inner wrapping anti-friction layer 8 is opposite to the lay direction of the signal line 6, and the wrapping direction of the PTFE semi-oriented tape outer wrapping anti-friction layer 11 is opposite to the lay direction of the cable core. In one embodiment, the aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer 13 is an aluminum-plastic composite tape longitudinally overlapping wrapping structure. The aluminum-plastic composite tape is formed by compounding an MDPE water-blocking inner layer, an aluminum foil layer, and an LDPE water-blocking outer layer. Further, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5, and the thickness of the aluminum foil layer is 30 μm to 150 μm. The thicknesses of both the EVA water-blocking inner bonding layer 12 and the EVA water-blocking outer bonding layer 14 are 3 μm to 10 μm.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Water-blocking filled anti-disconnection sensor signal cable, characterized by: The invention comprises two power cores (1) and two quadruple signal cores (2) twisted together to form a cable core, wherein the gaps between the cable cores are filled with petroleum jelly (3), wherein the outer diameter of the power core (1) is greater than the outer diameter of the quadruple signal core (2), wherein the power core (1) comprises a power core conductor (4) and a PFA insulation layer (5), wherein the power core conductor (4) is formed by twisting a plurality of tinned copper wires, wherein the quadruple signal core (2) comprises four signal wires (6) and a para-type fully aromatic copolyamide stretched fiber core material (7) twisted together to form a wire core body, wherein the wires (6) are ... The core body is coated with a PTFE semi-directional tape inner wrapped anti-friction layer (8) on the outside, the signal line (6) comprises a solid annealed copper conductor (9) and a radiation cross-linked low-density polyethylene insulation layer (10), the diameter of the solid annealed copper conductor (9) is 50% to 80% of the diameter of the tinned copper wire, and the cable core is coated with a PTFE semi-directional tape outer wrapped anti-friction layer (11), an EVA water-blocking inner bonding layer (12), an aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer (13), an EVA water-blocking outer bonding layer (14) and a radiation cross-linked high-density polyethylene outer sheath layer (15) in sequence on the outside.

2. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1 is characterized in that: The outer diameter of the four-wire group signal wire core (2) is 60 to 80% of the outer diameter of the power wire core (1).

3. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1 is characterized in that: The PTFE semi-directional tape inner wrapped anti-friction layer (8) and the PTFE semi-directional tape outer wrapped anti-friction layer (11) are both multi-layer PTFE semi-directional tape overlapping wrapped structures with a thickness of 0.05 to 0.1 mm.

4. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 3 is characterized in that: The winding direction of the anti-friction layer (8) wrapped inside the PTFE semi-directional tape is opposite to the twisting direction of the signal line (6), and the winding direction of the anti-friction layer (11) wrapped outside the PTFE semi-directional tape is opposite to the twisting direction of the cable core.

5. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1 is characterized in that: The signal wires (6) of the two quad-wire signal wire cores (2) have the same twist direction and are opposite to the twist direction of the cable core.

6. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1 is characterized in that: The signal wires (6) of the two quad-wire signal wire cores (2) have different lay lengths.

7. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1 is characterized in that: The aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer (13) is an aluminum-plastic composite tape longitudinally overlapped wrapped structure, and the aluminum-plastic composite tape is formed by a composite of an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.

8. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 7 is characterized in that: The thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5, and the thickness of the aluminum foil layer is 30 μm to 150 μm.

9. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1, characterized in that: The twist pitch of the signal line (6) is 10 to 20 times the outer diameter of the signal line (6).

10. The water-blocking and filling type anti-disconnection sensor signal cable according to claim 1, characterized in that: The thickness of the EVA water-blocking inner adhesive layer (12) and the EVA water-blocking outer adhesive layer (14) are both 3 μm to 10 μm.

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