Marine waterproof air-guiding detection cable

Abstract

The utility model relates to a marine waterproof air-guiding detection cable, and belongs to the technical field of marine cables. According to the technical scheme, a central gas-guide tube (3) is arranged in the center of the cable, a plurality of wire cores and PP filling ropes (4) are alternately arranged on the periphery of the central gas-guide tube (3) to form a cable, a waterproof lining layer (5) is extruded outside the cabled wire cores, a tinned braided shielding layer (6) is braided outside the waterproof lining layer (5), a water-blocking isolating layer (7) is lapped outside the tinned braided shielding layer (6), and a polyurethane sheath (8) is extruded outside the water-blocking isolating layer (7). The beneficial effects of the utility model are that the cable can be prevented from being affected with damp and oxidized in severe environments, and the stability of cable power supply and signals is improved. The central gas-guide tube is added in the cable structure to meet the pneumatic control requirement of the system and ensure that the external gas-guide function is not affected when the cable normally supplies power. And the cable sheath adopts a polyurethane sheath, so that the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to a marine waterproof gas-conducting detection cable, belonging to the technical field of marine cables. Background Art

[0002] According to the requirements of SOLAS Convention XII / 12 and IMO document MSC.145(77), all classified bulk carriers' cargo holds, any ballast tanks forward of the collision bulkhead and any dry or empty holds other than chain lockers with a volume exceeding 0.1% of the ship's maximum displacement must be equipped with water ingress alarm devices: the alarm water levels for cargo holds are 0.5 metres and 2 metres, the alarm water level for ballast tanks is 10% of the hold capacity water level, and the alarm water level for other dry or empty holds is 0.1 metres.

[0003] As global trade increases, the number and size of ships continue to expand, and the demand for navigation equipment will continue to increase. Due to the relatively low cost of shipping, cargo transportation accounts for a large proportion of maritime transportation. In combination with international practices and industry requirements, cargo ship related positions need to install cargo hold water ingress alarm systems. Due to the particularity of marine transportation, cables are in a humid and salty environment for a long time. Taking the above factors into consideration, the cable design is considered from the following aspects: First, to prevent the cable conductor from being damp and oxidized in a harsh environment, the stability of the cable power supply and signal is poor; second, the cable has low waterproof performance, and it cannot guarantee that the cable can be used normally in a water environment or a humid environment for a long time; third, the system has pneumatic control requirements, but the existing cables cannot meet its pneumatic control requirements; fourth, the cable sheath has poor corrosion resistance, mildew resistance, wear resistance, high strength, and acid and alkali resistance, and the cable is easily damaged after long-term use. Utility Model Content

[0004] The utility model aims to provide a marine waterproof gas-guiding detection cable, in which tinned copper wire is used for both the cable conductor and the braided layer to prevent the copper wire from being damp and oxidized in a harsh environment, thereby improving the stability of the cable power supply and signal; a water-blocking isolation layer is added to the outside of the wire core after it is cabled to ensure that the cable can be used normally in a water environment or a humid environment for a long time; a central gas guide tube is added to the cable structure to meet the pneumatic control requirements of the system and ensure that the normal power supply and external gas guide function of the cable are not affected; the outermost protective layer is made of polyurethane material to ensure that the cable is softer, improve the cable's tensile resistance, wear resistance, oil resistance, water resistance, weather resistance, aging resistance, corrosion resistance, cold resistance and other properties, and solve the above-mentioned problems existing in the background technology.

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

[0006] A marine waterproof gas-guiding detection cable comprises a wire core, a central air-guiding tube, a PP filling rope, a waterproof inner lining layer, a tinned braided shielding layer, a water-blocking isolation layer and a polyurethane sheath. The central air-guiding tube is arranged in the center of the cable, and a plurality of wire cores and PP filling ropes are alternately arranged around the central air-guiding tube to form a cable. The waterproof inner lining layer is extruded outside the cabled wire core, a tinned braided shielding layer is braided outside the waterproof inner lining layer, a water-blocking isolation layer is wrapped outside the tinned braided shielding layer, and a polyurethane sheath is extruded outside the water-blocking isolation layer.

[0007] Furthermore, the wire core comprises a tinned copper conductor and XLPE insulation, and a plurality of tinned copper conductors are twisted and then covered with XLPE insulation.

[0008] Furthermore, there are three wire cores and three PP filling ropes, and the three wire cores and the three PP filling ropes are alternately arranged in sequence.

[0009] Furthermore, the water-blocking isolation layer is formed by wrapping a self-adhesive water-blocking tape.

[0010] The innovation of the utility model is:

[0011] 1. XLPE insulation is used, with a tensile strength of ≥12.5Mpa and an elongation at break of ≥200%, which maintains the high insulation electrical properties of the low-voltage cable and improves the high temperature resistance and aging resistance of the cable insulation.

[0012] 2. Use multi-strand twisted PP filling rope for filling. The material is non-hygroscopic, the cable core is tighter, reducing the cable size while making the cable more solid and firm, solving the problem of the cable being easily affected by moisture and water.

[0013] 3. The central air duct is extruded from functional high-strength materials to support the wire core, which can not only ensure structural stability, but also increase the normal operation of the cable conductor system and meet the related functions of on-site operations and detection systems.

[0014] 4. The waterproof lining layer is made of extruded PE material with good waterproofness, which greatly improves the ability to prevent radial penetration of water.

[0015] 5. Both the cable conductor and braided layer are made of tinned copper wire to prevent the copper wire from being damp and oxidized in harsh environments; the density of the tinned braided shielding layer is over 80%, which not only plays a shielding role but also acts as a metal armor protection layer, so that the internal insulated core is armored and protected, and can effectively suppress the internal and external electromagnetic interference of the cable, improve the anti-interference ability, and ensure the safe use of the system.

[0016] 6. The water-blocking isolation layer is made of self-adhesive water-blocking tape, and the wrapping overlap is self-adhesive and bonded together, which can make the cable core wrap more tightly and stabilize the overall waterproof performance of the cable.

[0017] 7. The polyurethane sheath is made of modified polyurethane material with a Shore hardness of 80A. It has better mechanical properties such as wear resistance and low temperature resistance. It also has comprehensive protective properties such as waterproof and corrosion resistance, which improves the service life of the cable.

[0018] The positive effects of the utility model are: it can prevent the cable from being damp and oxidized in a harsh environment, and improve the stability of the cable power supply and signal. A central air guide tube is added to the cable structure to meet the pneumatic control requirements of the system and ensure that the normal power supply and air guide function of the cable are not affected. The cable sheath adopts a polyurethane sheath, which increases the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] In the figure: tinned copper conductor 1, XLPE insulation 2, central air guide tube 3, PP filling rope 4, waterproof lining layer 5, tinned braided shielding layer 6, water-blocking isolation layer 7, polyurethane sheath 8. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] A marine waterproof gas-guiding detection cable comprises a wire core, a central gas-guiding tube 3, a PP filling rope 4, a waterproof lining layer 5, a tinned braided shielding layer 6, a water-blocking isolation layer 7 and a polyurethane sheath 8. The central gas-guiding tube 3 is arranged in the center of the cable. There are three wire cores and three PP filling ropes 4. The three wire cores and the three PP filling ropes 4 are alternately arranged around the central gas-guiding tube 3 in sequence to form a cable. The waterproof lining layer 5 is extruded outside the cabled wire core, and a tinned braided shielding layer 6 is braided outside the waterproof lining layer 5. The water-blocking isolation layer 7 is wrapped around the tinned braided shielding layer 6, and the water-blocking isolation layer 7 is extruded outside the polyurethane sheath 8.

[0023] Preferably, the wire core comprises a tinned copper conductor 1 and an XLPE insulation 2, and a plurality of tinned copper conductors 1 are twisted and then covered with the XLPE insulation 2. The tinned copper conductor 1 has good corrosion resistance and electrical conductivity; the XLPE insulation 2 is extruded outside the conductor to improve the electrical properties of the insulation, high and low temperature resistance and aging performance.

[0024] Preferably, the three wire cores are red, white and black three-color wire cores.

[0025] The central air guide tube 3 plays a supporting and filling role, improving the stability of the cable structure; the PP filling rope 4 is filled in the edge gap of the core to enhance the roundness of the cable. The non-hygroscopic material can more effectively prevent water from penetrating, making the cable more solid and firm. The waterproof lining layer 4 is extruded outside the cable core, and the waterproof lining layer 5 is extruded from a PE material with good waterproofness, which greatly improves the ability to prevent radial water penetration. The tin-plated braided shielding layer 6 can not only protect the inner insulating core but also resist internal and external electromagnetic signal interference to ensure the safety of the system. The water-blocking isolation layer 7 has a certain degree of self-adhesion, and the wrapping overlap is self-adhesive and bonded together, which can make the cable core wrap more tightly and have good waterproof performance. The polyurethane sheath 8 improves the mechanical strength of the cable. The modified polyurethane sheath not only has mechanical properties such as wear resistance and low temperature resistance, but also has comprehensive protective properties such as waterproof and corrosion resistance, which improves the service life of the mobile cable drum cable.

[0026] In this embodiment, the copper conductor is formed by twisting two types of tinned copper conductors that comply with the GB / T3956 standard.

[0027] The XLPE insulation 2 is a cross-linked polyethylene material, which ensures high tensile strength of the insulation, with a tensile strength of ≥12.5Mpa and an elongation at break of ≥200%. It also has the characteristics of fast extrusion, low specific gravity, and environmental protection and no pollution. Compared with traditional PVC insulation, it improves the electrical properties, high temperature and aging resistance of the insulation, and meets the use requirements of the cable in a high temperature environment.

[0028] The PP filling rope 4 is formed by twisting multiple PP ropes to fill the gaps in the center of the cable and between the cores, which not only meets the purpose of making the cable core round, but also fills the full cable cross-section without gaps, preventing the entry of moisture and water, making the cable more solid and firm, and increasing the stability of the structure.

[0029] The central air guide tube 3 can not only meet the electrical connection, but also increase the pneumatic function of the cable, meeting the functions related to field operations and detection systems. At the same time, the high-strength air guide tube has a good supporting effect and enhances the stability of the cable. Due to the small specifications of the cable, the air guide tube is required to have a diameter of 2.0-2.3mm and a wall thickness of 0.4-0.6mm.

[0030] The waterproof lining layer 5 is extruded from a PE material with good waterproofness, and the ability to prevent radial penetration of water is greatly improved.

[0031] The braiding density of the tinned braided shielding layer 6 is more than 80%. The cable is used in the alarm system and belongs to the low voltage category, mainly used for low voltage power supply and signal transmission. Therefore, the cable is braided with copper wire, which can effectively suppress the electromagnetic interference inside and outside the cable, greatly enhance the anti-interference ability, and stabilize the various application functions of the alarm system.

[0032] The water-blocking isolation layer 7 adopts a new type of self-adhesive water-blocking tape, the wrapping direction is left, and the wrapping overlap rate is ≥20%. The tape has a certain self-adhesiveness, and the wrapping overlap is self-adhesive together, which can make the cable core wrap more tightly and have good waterproof performance.

[0033] The polyurethane sheath 8 is made of modified Huntsman polyurethane material with a Shore hardness of 80A, which has better mechanical properties and comprehensive protective performance. The polyurethane sheath has excellent high tension, high pulling force, strong and aging resistance characteristics, and has the characteristics of high strength, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, and weather resistance that other plastic materials cannot match. At the same time, it has many excellent functions such as high waterproofness and UV resistance.

Claims

1. A marine waterproof gas-conducting detection cable, characterized in that: The cable comprises a wire core, a central air guide tube (3), a PP filling rope (4), a waterproof inner lining layer (5), a tinned braided shielding layer (6), a water-blocking isolation layer (7) and a polyurethane sheath (8). The central air guide tube (3) is arranged at the center of the cable, and multiple wire cores and PP filling ropes (4) are alternately arranged around the central air guide tube (3) to form a cable. The waterproof inner lining layer (5) is extruded outside the cable core, the tinned braided shielding layer (6) is braided outside the waterproof inner lining layer (5), the water-blocking isolation layer (7) is wrapped outside the tinned braided shielding layer (6), and the water-blocking isolation layer (7) is extruded outside the polyurethane sheath (8).

2. A marine waterproof gas-conducting detection cable according to claim 1, characterized in that: The wire core comprises a tinned copper conductor (1) and an XLPE insulation (2); a plurality of tinned copper conductors (1) are twisted and then covered with the XLPE insulation (2).

3. A marine waterproof gas-conducting detection cable according to claim 1 or 2, characterized in that: There are three wire cores and three PP filling ropes (4), and the three wire cores and the three PP filling ropes (4) are arranged alternately in sequence.

4. A marine waterproof gas-conducting detection cable according to claim 1 or 2, characterized in that: The water-blocking isolation layer (7) is formed by wrapping a self-adhesive water-blocking tape.

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