Special cable for ocean exploration seismic source acquisition

Abstract

The utility model relates to a cable special for ocean exploration seismic source acquisition, and belongs to the technical field of cables. According to the technical scheme, a modified high-hardness PP insulating material (2) is extruded outside a tin-plated copper alloy conductor (1) to form a copper alloy wire core with an insulating layer, two copper alloy wire cores with insulating layers are stranded to form a pair of stranded wire cores, an aluminum-plastic composite film shielding layer (3) is lapped outside the stranded wire cores, a tin-plated copper wire drainage wire (4) is synchronously arranged on the aluminum-plastic composite film shielding layer, and the tin-plated copper wire drainage wire (4) is wound on the aluminum-plastic composite film shielding layer (3). A shielding twisted pair is formed; an elastomer inner sheath is extruded outside the shielding twisted pair, and a polyurethane outer sheath is extruded outside the elastomer inner sheath. The tensile strength of the cable is improved, and the risk of conductor fracture caused by external force is reduced; the insulating property of the cable is improved, the scratch and puncture resistance is enhanced, and the safe operation of the cable in a severe environment is ensured; external electromagnetic interference is effectively isolated, the accuracy and stability of signal transmission are improved, and the cable has excellent waterproof, dustproof and wear-resistant properties.

Description

Technical Field

[0001] This utility model relates to a special cable for marine exploration seismic source acquisition, belonging to the field of cable technology. Background Technology

[0002] The marine exploration seismic source acquisition cable is specifically designed for seismic exploration signal transmission. It connects seismic detectors (sensors) to data acquisition systems (acquisition stations / recorders), converting the seismic waves (mechanical vibration signals) received by the detector into electrical signals and transmitting them to the data acquisition system with low loss. The marine exploration seismic source acquisition cable uses a shielding structure to suppress electromagnetic interference, ensuring the integrity of weak seismic signals.

[0003] Existing marine exploration seismic source acquisition cables face numerous challenges in complex field environments. For example, insufficient conductor strength makes them prone to breakage during frequent dragging and bending, leading to signal transmission interruptions or power supply anomalies. Furthermore, conventional insulation materials lack sufficient rigidity to withstand scratches and punctures from sharp objects, degrading insulation performance and causing safety hazards such as electrical leakage. Additionally, existing marine exploration seismic source acquisition cables have inadequate shielding, failing to effectively isolate external electromagnetic interference and affecting the accurate transmission of exploration signals. Moreover, the poor sheath protection of these cables makes them susceptible to damage in harsh environments such as humidity, underwater, and extreme temperatures, leading to water seepage, corrosion, signal interruptions, or equipment damage, severely impacting seismic exploration operations. Utility Model Content

[0004] The purpose of this invention is to provide a special cable for marine exploration seismic source acquisition, which improves the tensile strength of the cable and reduces the risk of conductor breakage due to external forces; it uses modified high-hardness PP insulation material to improve the insulation performance of the cable, enhance its resistance to scratches and punctures, and ensure the safe operation of the cable in harsh environments; it effectively isolates external electromagnetic interference, improves the accuracy and stability of signal transmission, and has excellent waterproof, dustproof and wear-resistant properties, extending the service life of the cable, reducing maintenance costs, and solving the above-mentioned technical problems existing in the prior art.

[0005] The technical solution of this utility model is:

[0006] A special cable for marine exploration seismic source acquisition comprises a tin-plated copper alloy conductor, modified high-hardness PP insulation material, an aluminum-plastic composite film shielding layer, tin-plated copper wire guide wires, an inner elastic sheath, and a polyurethane outer sheath. The tin-plated copper alloy conductor is extruded with modified high-hardness PP insulation material to form an insulated copper alloy core. Two insulated copper alloy cores are twisted together to form a pair of twisted cores. The twisted cores are wrapped with an aluminum-plastic composite film shielding layer. Tin-plated copper wire guide wires are simultaneously installed on the aluminum-plastic composite film shielding layer to form a shielded twisted pair. The shielded twisted pair is extruded with an inner elastic sheath, and the inner elastic sheath is extruded with a polyurethane outer sheath.

[0007] The tin-plated copper alloy conductor is drawn into wires and then coated with a tin-plated layer. Modified high-hardness PP insulating material is extruded over the wires to form a copper alloy wire core with an insulating layer. Two copper alloy wire cores with insulating layers are twisted together to form a pair of stranded wire cores. The stranded wire cores are then wrapped with an aluminum-plastic composite film shielding layer.

[0008] The two copper alloy wire cores with insulation layers are twisted together to form a twisted pair. This twisting method helps reduce electromagnetic interference between the wire cores and improves the quality of signal transmission. The aluminum-plastic composite film shielding layer is wrapped around the surface of the twisted wire cores, and tinned copper wire guides are attached inside the aluminum-plastic composite film shielding layer to form a shielded twisted pair. The tinned copper wire guides have good conductivity and corrosion resistance, and can promptly conduct static electricity or induced current generated during cable use to the ground, further improving the safety and stability of the cable.

[0009] The modified copper alloy conductor of this invention possesses excellent strength and conductivity. By adjusting the alloy ratio, conductivity and tensile strength are balanced, and a tin plating layer (3-5μm) protects the copper alloy from oxidation. The tin-plated copper alloy conductor has a single wire diameter of 0.1-0.3mm and is produced using a pre-bundling and then stranding method, with a stranding pitch ratio ≤14 times, enhancing the conductor's flexibility. The tin-plated copper alloy conductor has a tensile strength ≥800MPa, which is 300% higher than that of ordinary copper conductors. This effectively resists the risk of breakage caused by external forces such as dragging and bending during seismic exploration, ensuring stable power and signal transmission.

[0010] The modified high-hardness PP insulation material, extruded over the tin-plated copper alloy conductor, uses polypropylene (PP) as the matrix material, improving the material's aging resistance. Its hardness is increased by 20% compared to ordinary PP insulation material, effectively preventing external scratches and punctures to the cable insulation core, ensuring the cable's insulation reliability in complex environments. It meets the performance requirements of power and signal transmission cables in special environments such as earthquake exploration.

[0011] The elastic inner sheath is extruded over the shielded twisted pair of the cable. This elastic inner sheath is made of a highly elastic and abrasion-resistant material, which can buffer the cable when it is subjected to external impact, protecting the internal core and shielding layer.

[0012] The polyurethane outer sheath is extruded onto the surface of the elastomer inner sheath 5. Polyurethane material possesses excellent weather resistance, abrasion resistance, and water resistance. The elastomer inner sheath and polyurethane outer sheath are co-extruded, ensuring complete bonding between them. This co-extruded bonding structure enhances the overall protective performance of the cable, effectively preventing moisture, dust, and other external substances from penetrating the cable and extending its service life.

[0013] The beneficial effects of this utility model are:

[0014] 1. Using tin-plated copper alloy as the conductor greatly improves the tensile strength of the cable, reduces the risk of conductor breakage due to external forces, and ensures stable power supply and signal transmission for seismic exploration equipment in complex operating environments;

[0015] 2. Modified high-hardness PP insulation material not only improves the insulation performance of the cable, but also enhances its resistance to scratches and punctures, ensuring the safe operation of the cable in harsh environments;

[0016] 3. The aluminum-plastic composite film shielding layer combined with the tinned copper wire guide wire effectively isolates external electromagnetic interference, improves the accuracy and stability of signal transmission, and helps to obtain more accurate seismic exploration data.

[0017] 4. The co-extrusion structure and material properties of the modified elastic inner sheath and polyurethane outer sheath give the cable excellent waterproof, dustproof and wear-resistant properties, enabling it to adapt to various harsh outdoor environments, extending the cable's service life and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0019] In the diagram: 1. Tin-plated copper alloy conductor; 2. Modified high-hardness PP insulation material; 3. Aluminum-plastic composite film shielding layer; 4. Tin-plated copper wire drain wire; 5. Elastic inner sheath; 6. Polyurethane outer sheath. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] A special cable for marine exploration seismic source acquisition comprises a tin-plated copper alloy conductor, modified high-hardness PP insulation material, an aluminum-plastic composite film shielding layer, tin-plated copper wire guide wires, an inner elastic sheath, and a polyurethane outer sheath. The tin-plated copper alloy conductor is extruded with modified high-hardness PP insulation material to form an insulated copper alloy core. Two insulated copper alloy cores are twisted together to form a pair of twisted cores. The twisted cores are wrapped with an aluminum-plastic composite film shielding layer. Tin-plated copper wire guide wires are simultaneously installed on the aluminum-plastic composite film shielding layer to form a shielded twisted pair. The shielded twisted pair is extruded with an inner elastic sheath, and the inner elastic sheath is extruded with a polyurethane outer sheath.

[0022] The tin-plated copper alloy conductor is drawn into wire and then coated with a tin-plated layer. It is then extruded with modified high-hardness PP insulating material 2 to form a copper alloy wire core with an insulating layer. Two copper alloy wire cores with insulating layers are twisted together to form a pair of stranded wire cores. The stranded wire cores are then wrapped with an aluminum-plastic composite film shielding layer 3.

[0023] The two copper alloy wire cores with insulation layers are twisted together to form a twisted pair. This twisting method helps reduce electromagnetic interference between the wire cores and improves the quality of signal transmission. The aluminum-plastic composite film shielding layer 3 is wrapped around the surface of the twisted wire cores, and tinned copper wire guides 4 are attached inside the aluminum-plastic composite film shielding layer to form a shielded twisted pair. The tinned copper wire guides have good conductivity and corrosion resistance, and can promptly conduct static electricity or induced current generated during cable use to the ground, further improving the safety and stability of the cable.

[0024] The modified copper alloy conductor of this invention possesses excellent strength and conductivity. By adjusting the alloy ratio, conductivity and tensile strength are balanced, and a tin plating layer (3-5μm) protects the copper alloy from oxidation. The tin-plated copper alloy conductor has a single wire diameter of 0.1-0.3mm and is produced using a pre-bundling and then stranding method, with a stranding pitch ratio ≤14 times, enhancing the conductor's flexibility. The tin-plated copper alloy conductor has a tensile strength ≥800MPa, which is 300% higher than that of ordinary copper conductors. This effectively resists the risk of breakage caused by external forces such as dragging and bending during seismic exploration, ensuring stable power and signal transmission.

[0025] The modified high-hardness PP insulation material 2, extruded over the tin-plated copper alloy conductor 1, uses polypropylene (PP) as the matrix material, improving the material's aging resistance. Its hardness is increased by 20% compared to ordinary PP insulation material, effectively preventing external scratches and punctures to the cable's insulation core, ensuring the cable's insulation reliability in complex environments. This meets the performance requirements of power and signal transmission cables in special environments such as earthquake exploration.

[0026] The elastic inner sheath 5 is extruded around the shielded twisted pair of the cable. The elastic inner sheath 5 is made of a material with high elasticity and wear resistance, which can buffer the cable when it is subjected to external impact, protecting the internal core and shielding layer.

[0027] The polyurethane outer sheath 6 is extruded onto the surface of the elastomer inner sheath 5. Polyurethane material possesses excellent weather resistance, abrasion resistance, and water resistance. The elastomer inner sheath 5 and the polyurethane outer sheath 6 are co-extruded, ensuring complete bonding between them. This co-extruded bonding structure enhances the overall protective performance of the cable, effectively preventing moisture, dust, and other external substances from penetrating the cable and extending its service life.

[0028] The number of shielded twisted-pair cables can be one.

[0029] The number of shielded twisted pairs can be multiple, and multiple shielded twisted pairs are cabled together by a cage twisting machine, with the twisted cores being extruded with an elastic inner sheath 5.

[0030] In the embodiments, the special cables for seismic exploration source acquisition for marine exploration are typically 2-core, 4-core, or 16-core, with the 2-core, 4-core, or 16-core shielded twisted pairs being cabled together by a cage twisting machine.

[0031] This example uses a 16-core CPU:

[0032] The tin-plated copper alloy conductor 1 undergoes smelting and refining processes. By adjusting the alloy ratio, conductivity and tensile strength are balanced. The tin plating layer is 3-5μm thick, protecting the copper alloy from oxidation and ensuring its purity and compositional uniformity. The diameter of the single wire in the tin-plated copper alloy conductor is 0.1-0.3mm. It adopts a pre-bundling and then stranding method, with a designed conductor stranding pitch ratio ≤14 times to improve the conductor's flexibility. The tin-plated copper alloy conductor is then extruded with modified high-hardness PP insulation material 2. The temperature, pressure, and other parameters of the extruder are controlled to ensure that the insulation material is uniformly and tightly coated on the conductor surface. Two copper alloy cores with insulation layers are stranded according to the set pitch to form a pair of stranded cores. The stranded cores are then wrapped with an aluminum-plastic composite film shielding layer 3. During the wrapping process, attention is paid to controlling the wrapping tension and overlap rate to ensure the integrity and tightness of the shielding layer. Simultaneously, tin-plated copper wire guides 4 are attached inside the aluminum-plastic composite film of the aluminum-plastic composite film shielding layer, ensuring full contact with the aluminum-plastic composite film to form a shielded twisted pair. The 16-core shielded twisted pair is cabled together by a cage twisting machine, and an elastic inner sheath 5 is extruded around the twisted cores, followed by an outer polyurethane sheath 6. By precisely controlling the temperature, pressure, and extrusion speed of the co-extruder, the inner and outer sheaths are completely bonded together, forming a tight protective structure.

Claims

1. A special cable for seismic source acquisition in marine exploration, characterized in that: The shielded twisted pair consists of a tin-plated copper alloy conductor (1), a modified high-hardness PP insulation material (2), an aluminum-plastic composite film shielding layer (3), a tin-plated copper wire guide (4), an elastic inner sheath (5), and a polyurethane outer sheath (6). The tin-plated copper alloy conductor (1) is extruded with modified high-hardness PP insulation material (2) to form a copper alloy wire core with an insulation layer. Two copper alloy wire cores with insulation layers are twisted together to form a pair of twisted wire cores. The twisted wire cores are wrapped with an aluminum-plastic composite film shielding layer (3). Tin-plated copper wire guide (4) is set on the aluminum-plastic composite film shielding layer (3) to form a shielded twisted pair. The shielded twisted pair is extruded with an elastic inner sheath (5), and the elastic inner sheath (5) is extruded with a polyurethane outer sheath (6).

2. The special cable for marine exploration seismic source acquisition according to claim 1, characterized in that: The tin-plated copper alloy conductor is drawn into a tin-plated layer and then extruded with modified high-hardness PP insulating material (2) to form a copper alloy wire core with an insulating layer. Two copper alloy wire cores with insulating layers are twisted together to form a pair of stranded wire cores. The stranded wire cores are wrapped with an aluminum-plastic composite film shielding layer (3).

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