Photoelectric composite winding cable for port machinery equipment as well as preparation method and application of photoelectric composite winding cable

Abstract

The invention provides a photoelectric composite winding cable for port machinery equipment and a preparation method and application thereof. The photoelectric composite winding cable for the port machinery equipment comprises a power line conductor, a conductor shielding layer, a power line insulating layer, an insulating shielding layer, a ground wire conductor, a ground wire insulating layer, an optical fiber unit, a semi-conductive rubber buffer layer, a filling strip, a reinforcing piece, an inner sheath, a fiber torsion-resistant layer and an outer sheath. The photoelectric composite winding cable for the port machinery equipment can be normally used under high-speed winding up to 300m / min, the winding period can reach 20000 times or more, and the photoelectric composite winding cable also has high flexibility and excellent tensile property and is suitable for being used under harsh working conditions such as moisture and seaside.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to a photoelectric composite winding cable for port machinery equipment, and a preparation method and application thereof. Background Art

[0002] With the rapid development of foreign economic and trade, the cargo throughput of coastal ports has increased year by year, and the country has increasingly increased its investment in port construction, which has promoted the extensive application and development of automated mechanical equipment such as shore container cranes, rail-mounted container gantry cranes, ship unloaders, and boom cranes for port cargo loading and unloading. Due to the working characteristics of mechanical equipment such as shore container cranes for port cargo loading and unloading, the power cable used to power the motor moves with the reeling and unwinding of the cable drum, and the cable is frequently dragged and curled. The internal core is repeatedly subjected to large longitudinal tension, and is affected by factors such as harsh working conditions such as the seaside and humidity, so ordinary cables are not suitable.

[0003] At present, the winding cables for port machinery equipment in the industry are mainly medium- and low-speed winding cables, and the winding speed is generally below 120 meters per minute. Winding speeds that are too fast can easily lead to conductor breakage, cable core distortion, optical fiber breakage, etc., and cannot meet the requirements of tire cranes or other automated terminals for a winding speed of 300 meters per minute.

[0004] Therefore, in view of the above problems, it is urgent to develop an optoelectronic composite winding cable for port machinery equipment that is suitable for the high winding speed requirement of 300 meters per minute and has a long winding cycle. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a photoelectric composite wound cable for port machinery equipment, and a preparation method and application thereof. The photoelectric composite wound cable for port machinery equipment has the ability to be used at a high-speed winding of 300m / min, and has a winding life of more than 20,000 times. At the same time, it has excellent softness and tensile properties, a high maximum allowable operating temperature and a high short-circuit allowable temperature, a low DC resistance, and a low performance attenuation. It is suitable for use in harsh working conditions such as at the seaside and in humidity.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides an optoelectronic composite wound cable for port machinery equipment, the optoelectronic composite wound cable for port machinery equipment comprising a power line conductor, a conductor shielding layer, a power line insulation layer, an insulation shielding layer, a ground line conductor, a ground line insulation layer, an optical fiber unit, a semi-conductive rubber buffer layer, a filling strip, a reinforcement member, an inner sheath, a fiber torsion-resistant layer and an outer sheath;

[0008] The conductor shielding layer, the power line insulation layer and the insulation shielding layer are sequentially coated on the outside of the power line conductor to form a power line core;

[0009] The ground wire insulation layer is coated on the outside of the ground wire conductor to form a ground wire core;

[0010] The optical fiber unit comprises a plurality of colored optical fibers, the plurality of colored optical fibers are coated with fiber paste and composite loose tube in sequence to form an optical fiber core, a plurality of optical fiber cores are twisted with a central reinforcing rib as the center, a wrapping tape is further coated outside the twisted optical fiber cores, and a plurality of filling cotton ropes are filled in the gap between the wrapping tape and the twisted optical fiber cores;

[0011] The semi-conductive rubber buffer layer is coated outside the optical fiber unit;

[0012] The cross-sectional shape of the filling strip is Y-shaped, and the reinforcement member is arranged at the center of the filling strip;

[0013] A power line core, a ground line core, a power line core, an optical fiber unit, a power line core and a ground line core are sequentially arranged around the outside of the filling strip and twisted with the filling strip as the center to form an optoelectronic composite winding cable core;

[0014] The inner sheath, the fiber torsion-resistant layer and the outer sheath are sequentially coated on the outside of the optoelectronic composite wound cable core.

[0015] The photoelectric composite wound cable for port machinery equipment provided by the present invention is suitable for port machinery equipment of medium voltage 18 / 30kV and below.

[0016] When the cross-sectional area of ​​the cable is small, the tensile strength of the cable itself is not high. During the long-term winding and retracting process, the cable is subjected to dragging force, which causes the structural materials of each layer to be stretched to a certain extent. The sheath material can recover due to its elasticity, but the retraction performance of the metal conductor is very poor, and the conductor is very easy to be broken after long-term use. Therefore, in order to ensure that the cable has higher flexibility and tensile strength, the present invention makes the following preferred restrictions on the power line conductor and the ground line conductor:

[0017] Preferably, the power line conductor and the ground line conductor are both tinned copper conductors, and more preferably are Class VI tinned copper conductors.

[0018] Preferably, the tinned copper conductor is obtained by twisting a plurality of tinned copper strands around polyester fiber.

[0019] As a preferred technical solution of the present invention, adding polyester fiber in the center of the conductor helps to further enhance the tensile strength of the cable, ensuring that it is the fiber rather than the conductor that is subjected to force when the cable is bent and wound, thereby effectively avoiding the problem of the conductor being easily broken during long-term use.

[0020] Preferably, the re-twisted pitch diameter ratio of the tinned copper strands is 8 to 15 times, for example, 8 times, 9 times, 10 times, 12 times, 14 times or 15 times.

[0021] Preferably, the tinned copper strand is obtained by bundling a plurality of tinned copper wires.

[0022] Preferably, the bundle-to-pitch diameter ratio of the tinned copper wire is 15 to 25 times, for example, 15 times, 17 times, 19 times, 21 times, 23 times or 25 times.

[0023] Preferably, the single wire diameter of the tinned copper wire is 0.1-0.3 mm, for example, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm or 0.3 mm.

[0024] As a preferred technical solution of the present invention, by limiting the bundle diameter ratio to 15 to 25 times and the multiple twisted diameter ratio to 8 to 15 times, the cable can be made more flexible; and by limiting the conductor to Category VI conductors, and by limiting the thinner conductor monofilament to 0.1 to 0.3 mm, the conductor's own stress can be dispersed when the conductor is bent, thereby further improving the flexibility of the cable.

[0025] In addition, the composition, performance and appearance of the power line conductor and the ground line conductor described in the present invention all comply with the requirements of the GB / T3956 standard. The conductor surface is smooth, without burrs, sharp edges, and protruding or broken single wires that damage the insulation, and the resistance values ​​all comply with the provisions of GB / T3956.

[0026] Preferably, the material of the conductor shielding layer includes semi-conductive conductor shielding material.

[0027] In the present invention, the conductor shielding layer is used to neutralize the unevenness of the surface of the power line conductor and plays a role in balancing the electric field.

[0028] Preferably, the resistivity of the conductor shielding layer is ≤1000Ω·m, for example, 1000Ω·m, 800Ω·m, 600Ω·m, 400Ω·m or 200Ω·m.

[0029] Preferably, the thickness of the conductor shielding layer is 0.3-0.7 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm or 0.7 mm.

[0030] Preferably, the material of the power line insulation layer includes an ethylene-propylene rubber composition, and more preferably a high-purity ethylene-propylene rubber composition;

[0031] The high-purity EPDM composition comprises the following components: 45 parts by weight of EPDM rubber, 10 to 20 parts by weight of low-density polyethylene resin, 50 parts by weight of modified calcined kaolin, 2.0 parts by weight of zinc oxide, 4.0 parts by weight of microcrystalline wax, 1 part by weight of titanium dioxide, 0.5 parts by weight of stearic acid, 0.4 parts by weight of antioxidant RD, 0.6 parts by weight of antioxidant synergist MB, 2 parts by weight of paraffin oil, 0.5 parts by weight of coupling agent A-172, 4 parts by weight of crosslinking agent DCP and 0.5 parts by weight of crosslinking aid TAIC.

[0032] In the present invention, the thickness of the power line insulation layer refers to the Q / 320584PDH 204-2023 standard requirements, the average thickness is not less than the nominal thickness, and the thinnest point thickness is not less than 90%-0.1 mm of the nominal thickness.

[0033] Preferably, the material of the insulating shielding layer includes semi-conductive shielding insulating material.

[0034] In the present invention, the insulating shielding layer is used to balance the external electric field.

[0035] Preferably, the thickness of the insulating shielding layer is 0.4-0.9 mm, for example, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm.

[0036] Preferably, the resistivity of the insulating shielding layer is ≤500Ω·m, for example, 500Ω·m, 450Ω·m, 400Ω·m, 350Ω·m, 300Ω·m, 250Ω·m or 200Ω·m.

[0037] Preferably, the peeling force for peeling the conductor shielding layer from the power line insulation layer and the peeling force for peeling the insulation shielding layer from the power line insulation layer are each independently 4 to 45N, for example, 4N, 10N, 15N, 20N, 25N, 30N, 35N, 40N or 45N.

[0038] Preferably, the material of the ground wire insulation layer includes semi-conductive rubber material.

[0039] Preferably, the thickness of the ground wire insulation layer is 1-2 mm, for example, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm.

[0040] Preferably, the diameter of the colored optical fiber is 0.25-0.26 mm, for example, 0.25 mm, 0.252 mm, 0.254 mm, 0.256 mm, 0.258 mm or 0.26 mm.

[0041] Preferably, the composite loose tube is made of a polybutylene terephthalate plastic / fluoroplastic composite material.

[0042] Preferably, the material of the central reinforcing rib comprises glass fiber reinforced polyester resin composite material (FRP).

[0043] In the present invention, a composite loose tube is arranged outside the colored optical fiber. The material of the composite loose tube is a composite material of polybutylene terephthalate plastic and fluoroplastic, and the entire tube must be free of joints. At the same time, fiber paste should be placed in the gap inside the composite loose tube, so as to ensure that the colored optical fiber is not subjected to stress during the winding and retracting process of the cable and can slide freely in the loose tube. A central reinforcing rib must be provided at the center of the optical fiber unit as a reinforcing structure to ensure that the optical fiber unit can withstand long-term dragging without breaking, thereby ensuring that the attenuation meets the requirements.

[0044] In the present invention, colored optical fibers with attenuation requirements and parameters as shown in Table 1 below can be selected:

[0045] Table 1

[0046]

[0047]

[0048] Preferably, the thickness of the semi-conductive rubber insulating layer is 1-2 mm, for example, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm.

[0049] In the present invention, a layer of rubber buffer material is extruded outside the optical fiber unit to ensure that the optical fiber unit has a buffer structure when the cable is wound and bent, and is not easily damaged. Furthermore, since the ground wire core is often flattened when the inner sheath is extruded outside the core of the optoelectronic composite winding cable, the present invention creatively sets the cross-sectional shape of the filling strip to be Y-shaped. The filling strip with a Y-shaped cross-sectional shape can support the power core, the ground wire core and the optical fiber unit, and ensure that the optical fiber unit is not deformed by the extrusion force during the cabling and sheathing process; on the one hand, it solves the problem of the optical fiber unit being deformed by extrusion under high temperature and high pressure, improves the appearance of the cable cross section and ensures the quality of the optical fiber unit; on the other hand, it makes the filling between the cores of the optoelectronic composite winding cable more compact, and enhances the impact resistance and extrusion performance of the cable.

[0050] Preferably, the filling strip is obtained by vulcanization in a vulcanization pipeline.

[0051] Since the Y-shaped filling strip has an inward concave "△" structure, the cooling water cannot be blocked during normal vulcanization through the vulcanization pipe. The gap of the circular sealing ring is too large, and the cooling water will flow out from the gap of the sealing ring, resulting in the pipe pressure not meeting the vulcanization requirements and the inability to vulcanize. After the unvulcanized Y-shaped filling strip is cabled, the steam pressure in the vulcanization pipe of the inner sheath during the extrusion process is 7-10 bar, and the temperature is between 170 and 200 ° C. The high temperature will flatten the unvulcanized Y-shaped filling strip, causing the center of gravity of the cable to shift. As a result, during the long-term winding and retracting process, the unevenly distributed center of gravity will be unevenly stressed, which will accelerate the consumption of the cable life. In order to ensure the full vulcanization of the Y-shaped filling strip, the following process is adopted:

[0052] Adopt vulcanization pipe vulcanization, find sealing film materials with various hardness materials, design with different thickness, carve out a Y-shaped outline in the middle of the sealing ring, put it in the sealing ring position, reduce the gap area, play the purpose of water blocking, and carry out vulcanization test the air pressure under the extreme water vapor equilibrium state; if the material is too hard or the carved outline size is not appropriate, it will jam the Y-shape and traction line joint and cause the filling to break; therefore, having a sealing ring with appropriate hardness, suitable thickness and appropriate outline size is the key to the long-length vulcanization of the Y-shape.

[0053] In the present invention, the material of the sealing ring preferably includes any one of ethylene propylene rubber, chlorinated polyethylene, chlorosulfonated polyethylene or chloroprene rubber, or a combination of at least two of them.

[0054] The relevant parameters of the above-mentioned EPDM rubber, chlorinated polyethylene, chlorosulfonated polyethylene or chloroprene rubber are shown in Table 2 below:

[0055] Table 2

[0056] Material Type Material Shore hardness / A Sealing ring thickness / mm Limit water vapor equilibrium pressure / bar EPDM 50～80 5～10 4～8 Chlorinated Polyethylene 44～73 5～10 3～10 Chlorosulfonated polyethylene 47～80 5～10 5～9 Neoprene 40～70 5～10 3～12

[0057] Preferably, the outer shape of the filling strip with a Y-shaped cross-section is composed of six arc segments, the six arc segments include three large concave arc segments and three small concave arc segments, a large concave arc segment, a small concave arc segment, a large concave arc segment, a small concave arc segment, a large concave arc segment and a small concave arc segment are connected in sequence to form a Y-shaped structure; and the three large concave arc segments all match the shape of the power line core, and the three small concave arc segments respectively match the shapes of the ground wire core, the optical fiber unit and the ground wire core.

[0058] Preferably, an isolation material is further provided between the core and the inner sheath of the optoelectronic composite wound cable.

[0059] As a preferred technical solution of the present invention, the provision of the isolation material can further ensure that during the high-speed cable winding process, there is a displacement gap between the core and the inner sheath of the optoelectronic composite wound cable, thereby reducing the distortion of the conductor.

[0060] Preferably, the isolation material includes any one of a release agent, talcum powder, silicone oil or graphite, or a combination of at least two of them.

[0061] The specific usage and friction parameters of the above release agents, talcum powder, silicone oil or graphite are shown in Table 3 below:

[0062] Table 3

[0063] Material Type Dosage Friction force / N Release agent 300~500mL / km 80 Silicone oil 100~300mL / km 60 graphite 100~500g / km 140 talcum powder 300~600g / km 155

[0064] Preferably, the inner sheath is an elastomeric rubber inner sheath.

[0065] Preferably, the thickness of the inner sheath is 2-3 mm, such as 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm or 3 mm, etc.; the average thickness is not less than the nominal thickness, and the thickness at the thinnest point is not less than 85%-0.1 mm of the nominal thickness.

[0066] A layer of fiber mesh structure is woven on the surface of the inner sheath. When the cable is wound and bent, the surface of the bent cable core is subjected to greater tensile stress. The mesh structure can disperse the bending tensile force, increase the cable's anti-fatigue bending life, and contribute to the long-term use of the cable. By way of example, 2 to 8 1500D fiber filaments can be used, and multiple fiber filaments need to be twisted and woven on the surface of the inner cable core through the gaps of a braiding machine.

[0067] Preferably, the mesh density of the fiber braided torsion-resistant layer is 10-20%, for example, 10%, 12%, 14%, 16%, 18% or 20%.

[0068] Preferably, the outer sheath is an elastomeric rubber outer sheath.

[0069] In the present invention, the inner sheath and the outer sheath are made of the same material, and the two materials need to have secondary processing adhesion properties. The inner sheath is extruded and then woven with a fiber torsion-resistant layer. The outer sheath needs to be bonded to the inner sheath. The woven fiber torsion-resistant layer is sandwiched between the two sheaths. The three-layer structure forms a whole, ensuring that when the cable is subjected to torsional force, the inner and outer sheaths and the fiber torsion-resistant layer can disperse the external force and protect the internal cable core electrical performance and the attenuation of the optical fiber unit.

[0070] Preferably, the thickness of the outer sheath is 2.5-5 mm, for example, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc.; the average thickness is not less than the nominal thickness, and the thickness at the thinnest point is not less than 85% to 0.1 of the nominal thickness.

[0071] In a second aspect, the present invention provides a method for preparing the optoelectronic composite wound cable for port machinery equipment as described in the first aspect, the preparation method comprising the following steps:

[0072] A conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially extruded outside the power line conductor to form a power line core;

[0073] A conductor shielding layer, a power line insulation layer and an insulation shielding layer are sequentially extruded outside the power line conductor to form a power line core;

[0074] Extruding a ground wire insulation layer outside the ground wire conductor to form a ground wire core;

[0075] Coating a plurality of colored optical fibers with fiber paste, and then extruding a composite loose tube to form an optical fiber core; twisting the obtained multiple optical fiber cores with a central reinforcing rib as the center, and then using a plurality of filling cotton yarns to fill the pores of the twisted multiple optical fiber cores, and then wrapping the wrapping tape around the twisted multiple optical fiber cores and the filling cotton rope to form an optical fiber unit;

[0076] A semi-conductive rubber buffer layer is extruded outside the light unit;

[0077] A reinforcing member is arranged in the middle of a filling strip having a Y-shaped cross section, and a power core, a ground core, a power core, an optical fiber unit, a power core and a ground core are arranged around the outside of the filling strip in sequence, and are twisted in the right direction with the filling strip as the center to form an optoelectronic composite winding cable core;

[0078] The photoelectric composite wound cable is extruded with an inner sheath outside the core of the photoelectric composite wound cable, a fiber torsion-resistant layer is woven, and an outer sheath is extruded to obtain the photoelectric composite wound cable for port machinery equipment.

[0079] Preferably, before extruding an inner sheath outside the optoelectronic composite wound cable core, the method further includes the step of coating an insulating material outside the optoelectronic composite wound cable core.

[0080] In a third aspect, the present invention provides an application of an optoelectronic composite winding cable for port machinery equipment as described in the first aspect, wherein the application includes use in a shore container crane, a rail-mounted container gantry crane, a ship unloader, a stacker-reclaimer or a large bridge crane reel device.

[0081] Compared with the prior art, the present invention has the following beneficial effects:

[0082] (1) The optical-electric composite winding cable for port machinery provided by the present invention has a left-right torsion of ±270°, excellent softness and tensile strength, and the ability to be wound at a high speed of less than 300 m / min;

[0083] (2) The maximum allowable operating temperature of the optoelectronic composite winding cable for port machinery equipment provided by the present invention is 90°C, and the short-circuit allowable temperature is 250°C (maximum duration 5s);

[0084] (3) The optoelectronic composite winding cable for port machinery equipment provided by the present invention has a winding cycle of more than 20,000 times (one cycle is when the cable is extended from the cable drum and then wound up). BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 A schematic cross-sectional structure diagram of the optoelectronic composite wound cable for port machinery equipment provided by the present invention;

[0086] Figure 2 A schematic cross-sectional structure diagram of an optical fiber unit provided by the present invention;

[0087] Among them, 1-power line conductor, 2-conductor shielding layer, 3-power line insulation layer, 4-insulation shielding layer, 5-ground wire conductor, 6-ground wire insulation layer, 7-optical fiber unit, 8-semi-conductive rubber buffer layer, 9-filling strip, 10-reinforcement member, 11-inner sheath, 12-fiber torsion-resistant layer, 13-outer sheath, 7-1-colored optical fiber, 7-2-fiber paste, 7-3-composite loose tube, 7-4-center reinforcement rib, 7-5-tape and 7-6-filling cotton rope. DETAILED DESCRIPTION

[0088] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0089] Unless otherwise specified, the materials involved in the following specific embodiments are all conventional materials in the art and can be obtained by purchasing commercially available products.

[0090] Example 1

[0091] A photoelectric composite winding cable for port machinery equipment, the cross-sectional structure diagram is as follows Figure 1 As shown, it includes a power line conductor 1, a conductor shielding layer 2, a power line insulation layer 3, an insulation shielding layer 4, a ground line conductor 5, a ground line insulation layer 6, an optical fiber unit 7, a semi-conductive rubber buffer layer 8, a filling strip 9, a reinforcement member 10, an inner sheath 11, a fiber torsion layer 12 and an outer sheath 13;

[0092] The conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are sequentially coated on the outside of the power line conductor 1 to form a power line core;

[0093] The power line conductor 1 is a sixth-category tinned copper conductor, which is formed by bundling tinned copper wires with a single wire diameter of 0.2 mm at a bundle pitch ratio of 20 times to form tinned copper strands, and then re-twisting the multiple tinned copper strands with polyester fiber as the center at a re-twisted pitch ratio of 10 times. The whole meets the requirements of GB / T3956 standard, with a smooth surface, no burrs, sharp edges, and protruding or broken single wires that damage the insulation, and the resistance value meets the requirements of GB / T3956;

[0094] The conductor shielding layer 2 has a thickness of 0.5 mm and a shielding resistivity of 800 Ω·m. The material is a semi-conductive conductor shielding material purchased from Shandong Zhanxin New Materials Co., Ltd. with a brand name of PEJJ.

[0095] The thickness of the power line insulation layer 3 is 5 mm, and the material is a high-purity EPDM insulation composition (including 45 parts by weight of EPDM rubber, 10-20 parts by weight of low-density polyethylene resin, 50 parts by weight of modified calcined kaolin, 2.0 parts by weight of zinc oxide, 4.0 parts by weight of microcrystalline wax, 1 part by weight of titanium dioxide, 0.5 parts by weight of stearic acid, 0.4 parts by weight of antioxidant RD, 0.6 parts by weight of antioxidant synergist MB, 2 parts by weight of paraffin oil, 0.5 parts by weight of coupling agent A-172, 4 parts by weight of crosslinking agent DCP and 0.5 parts by weight of crosslinking aid TAIC);

[0096] The thickness of the insulating shielding layer 4 is 0.5 mm, the shielding resistivity is 400 Ω·m, and the material is a semi-conductive insulating shielding material purchased from Shandong Zhanxin New Materials Co., Ltd., with a brand name of PEJD;

[0097] The ground conductor 5 is coated with a ground insulation layer 6 to form a ground core;

[0098] The ground conductor 5 is a sixth-category tinned copper conductor, which is obtained by bundling tinned copper wires with a single wire diameter of 0.2 mm at a bundle pitch ratio of 20 times to form tinned copper strands, and then re-twisting multiple tinned copper strands with polyester fiber as the center at a re-twisted pitch ratio of 10 times. The whole conductor meets the requirements of GB / T3956 standard, has a smooth surface, and is free of burrs, sharp edges, and protruding or broken single wires that damage the insulation, and the resistance value meets the requirements of GB / T3956.

[0099] The thickness of the ground wire insulation layer 6 is 1.5 mm, and the material is a semi-conductive rubber material purchased from Shandong Zhanxin New Materials Co., Ltd., with the brand name HBD;

[0100] The cross-sectional structure diagram of the optical fiber unit 7 is shown in FIG. Figure 2As shown, it includes a plurality of colored optical fibers 7-1, the plurality of colored optical fibers 7-1 are coated with fiber paste 7-2 and composite loose tube 7-3 in sequence to form an optical fiber core, a plurality of optical fiber cores are twisted with a central reinforcing rib 7-4 as the center, a wrapping tape 7-5 is wrapped outside the twisted optical fiber cores, and a plurality of filling cotton ropes 7-6 are filled in the gap between the wrapping tape 7-5 and the twisted optical fiber cores;

[0101] The model of the colored optical fiber 7-1 is 62.5 / 125, the diameter is 62.5 μm, the maximum attenuation at 850 nm is 3.2 dB / km, the maximum attenuation at 1300 nm is 1.2 dB / km, the slow injection bandwidth at 850 nm is 200 MHz / km, and the slow injection bandwidth at 1300 nm is 600 MHz / km;

[0102] The material of the composite loose tube 7-3 is a polybutylene terephthalate / fluoroplastic composite material purchased from Shanghai Enyan Engineering Plastics Co., Ltd., with a brand name of FJP-640;

[0103] The semi-conductive rubber buffer layer 8 is coated on the outside of the optical fiber unit 7, has a thickness of 1.5 mm, and is made of a semi-conductive rubber material purchased from Shandong Zhanxin New Materials Co., Ltd., with a brand name of HBD;

[0104] The cross-sectional shape of the filling strip 9 is Y-shaped, and is composed of six arc segments, which include three large concave arc segments and three small concave arc segments. A large concave arc segment, a small concave arc segment, a large concave arc segment, a small concave arc segment, a large concave arc segment and a small concave arc segment are sequentially connected to form a Y-shaped structure, and the three large concave arc segments are all matched with the shape of the power line core, and the three small concave arc segments are respectively matched with the shapes of the ground wire core, the optical fiber unit 7 and the ground wire core; the filling strip 9 is obtained by vulcanization in a vulcanization pipe, firstly, chloroprene rubber with a Shore hardness of 40 to 70A is selected as the material of the sealing ring, the thickness of the sealing ring is set to 4 to 10 mm, and the limit water vapor equilibrium pressure is 3 to 12 bar, and then a Y-shaped contour is carved in the middle of the sealing ring;

[0105] The reinforcing member 10 is arranged at the center of the filling strip 9. The material of the reinforcing member 10 is aramid fiber filament, which is purchased from Haoxinyuan and has a brand number of 1500D.

[0106] A power line core, a ground line core, a power line core, an optical fiber unit 7, a power line core and a ground line core are sequentially arranged around the outside of the filling strip 9 and twisted with the filling strip 9 to form an optoelectronic composite winding cable core;

[0107] The inner sheath 11, the fiber torsion-resistant layer 12 and the outer sheath 13 are sequentially arranged outside the optical-electric composite wound cable core;

[0108] The thickness of the inner sheath 11 is 2.5 mm, and the material is an elastomeric rubber purchased from (Shanghai Tianliu, brand KL3001;

[0109] The mesh density of the fiber torsion-resistant layer 12 is 15%, and 2 to 8 1500D fiber filaments are used. The multiple fiber filaments need to be twisted and woven on the surface of the inner sheath 11 through the gap of the braiding machine;

[0110] The thickness of the outer sheath 13 is 4 mm, and the material is an elastomeric rubber purchased from Shanghai Tianliu with a brand name of KL3001;

[0111] The preparation method of the optoelectronic composite wound cable for port machinery equipment provided in this embodiment comprises the following steps:

[0112] A conductor shielding layer 2, a power line insulation layer 3 and an insulation shielding layer 4 are sequentially extruded outside a power line conductor 1 to form a power line core;

[0113] A ground wire insulation layer 6 is extruded outside the ground wire conductor 5 to form a ground wire core;

[0114] After coating the fiber paste 7-2 on the outside of a plurality of colored optical fibers 7-1, a composite loose tube 7-3 is extruded to form an optical fiber core, and the plurality of optical fiber cores are twisted with the central reinforcing rib 7-4 as the center, and then a plurality of filling cotton ropes 7-6 are filled in the gaps between the twisted optical fiber cores, and then a wrapping tape 7-5 is wrapped around the twisted optical fiber cores and the plurality of filling cotton ropes 7-6 to form an optical fiber unit 7;

[0115] A semi-conductive rubber buffer layer 8 is extruded outside the light unit 7;

[0116] A reinforcement member 10 is added to the center of the filling strip 9, and then a power core, a ground core, a power core, an optical fiber unit 7, a power core and a ground core are sequentially arranged around the outside of the filling strip 9, and are twisted in the right direction with the filling strip 9 as the center to form an optoelectronic composite winding cable core;

[0117] Silicone oil is coated on the outside of the electric composite wound cable core, and then an inner sheath 11 is extruded, a fiber torsion-resistant layer 12 is braided, and an outer sheath 13 is extruded to obtain the optoelectronic composite wound cable for port machinery equipment.

[0118] Example 2

[0119] A photoelectric composite wound cable for port machinery equipment, which differs from Example 1 in that the single wire diameter of the tinned copper wire is 0.5 mm, and other structures, materials and preparation methods are the same as those in Example 1.

[0120] Example 3

[0121] A photoelectric composite wound cable for port machinery equipment, which differs from Example 1 in that a loose tube made of ETFE is used to replace a composite loose tube made of polybutylene terephthalate / fluoroplastic composite material, and other structures, materials and preparation methods are the same as those in Example 1.

[0122] Example 4

[0123] An optoelectronic composite wound cable for port machinery equipment, which differs from Example 1 in that silicone oil is not coated on the outside of the electric composite wound cable core, and the inner sheath is directly extruded, and other structures, materials and preparation methods are the same as those in Example 1.

[0124] Comparative Example 1

[0125] A photoelectric composite wound cable for port machinery equipment, which differs from Example 1 in that a semi-conductive rubber buffer layer is not coated outside the optical unit, and other structures, materials and preparation methods are the same as those of Example 1.

[0126] Performance Test:

[0127] Maximum winding speed, winding cycle and tensile properties: Tested in accordance with the test method provided in Q / 320584PDH 204-2023.

[0128] The photoelectric composite wound cables for port machinery equipment provided in Examples 1 to 4 and Comparative Example 1 were tested according to the above test method. The test results are shown in Table 4:

[0129] Table 4

[0130]

[0131] According to the data in Table 4, we can see that:

[0132] (1) The maximum winding speed of the optoelectronic composite winding cable for port machinery equipment provided in Examples 1 to 4 is relatively high, and the winding cycle is relatively long, while the tensile strength and optical fiber attenuation performance meet the requirements; in particular, the maximum winding speed of the optoelectronic composite winding cable for port machinery equipment provided in Example 1 can reach 300 m / min, the winding cycle can reach 20,000 times, and the tensile strength is as high as 20 N / mm 2 At the same time, the optical fiber attenuation is low, and the comprehensive performance reaches the best.

[0133] (2) Compared with Example 1, the optoelectronic composite winding cable for port machinery equipment provided in Comparative Example 1 is not coated with a semi-conductive rubber buffer layer outside the optical unit, resulting in a lower maximum winding speed and a shorter winding cycle.

[0134] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a photoelectric composite wound cable for port machinery equipment and its preparation method and application, but the present invention is not limited to the above-mentioned process steps, that is, it does not mean that the present invention must rely on the above-mentioned process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. An optoelectronic composite winding cable for port machinery equipment, characterized in that: The photoelectric composite wound cable for port machinery equipment comprises a power line conductor, a conductor shielding layer, a power line insulation layer, an insulation shielding layer, a ground line conductor, a ground line insulation layer, an optical fiber unit, a semi-conductive rubber buffer layer, a filling strip, a reinforcement piece, an inner sheath, a fiber torsion-resistant layer and an outer sheath; The conductor shielding layer, the power line insulation layer and the insulation shielding layer are sequentially coated on the outside of the power line conductor to form a power line core; The ground wire insulation layer is coated on the outside of the ground wire conductor to form a ground wire core; The optical fiber unit comprises a plurality of colored optical fibers, the plurality of colored optical fibers are coated with fiber paste and composite loose tube in sequence to form an optical fiber core, a plurality of optical fiber cores are twisted with a central reinforcing rib as the center, a wrapping tape is further coated outside the twisted optical fiber cores, and a plurality of filling cotton ropes are filled in the gap between the wrapping tape and the twisted optical fiber cores; The semi-conductive rubber buffer layer is coated outside the optical fiber unit; The cross-sectional shape of the filling strip is Y-shaped, and the reinforcement member is arranged at the center of the filling strip; A power line core, a ground line core, a power line core, an optical fiber unit, a power line core and a ground line core are sequentially arranged around the outside of the filling strip and twisted with the filling strip as the center to form an optoelectronic composite winding cable core; The inner sheath, the fiber torsion-resistant layer and the outer sheath are sequentially coated on the outside of the optoelectronic composite wound cable core.

2. The optoelectronic composite wound cable for port machinery equipment according to claim 1, characterized in that: The power line conductor and the ground line conductor are both tinned copper conductors, preferably Class VI tinned copper conductors; Preferably, the tinned copper conductor is obtained by twisting a plurality of tinned copper strands around polyester fiber; Preferably, the re-twisted pitch diameter ratio of the tinned copper strands is 8 to 15 times; Preferably, the tinned copper strand is obtained by bundling a plurality of tinned copper wires; Preferably, the bundle-to-pitch diameter ratio of the tinned copper wire is 15 to 25 times; Preferably, the single wire diameter of the tinned copper wire is 0.1-0.3 mm.

3. The optoelectronic composite wound cable for port machinery equipment according to claim 1 or 2, characterized in that: The material of the conductor shielding layer includes a semi-conductive conductor shielding material; Preferably, the thickness of the conductor shielding layer is 0.3-0.7 mm; Preferably, the material of the power line insulation layer comprises an ethylene-propylene rubber composition; Preferably, the thickness of the power line insulation layer is 1 to 7 mm; Preferably, the material of the insulating shielding layer includes a semi-conductive insulating shielding material; Preferably, the thickness of the insulating shielding layer is 0.4 to 0.9 mm; Preferably, the material of the ground wire insulation layer includes semi-conductive rubber material; Preferably, the thickness of the ground wire insulation layer is 1-2 mm.

4. The optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 3, characterized in that: The diameter of the colored optical fiber is 0.25-0.26 mm; Preferably, the composite loose tube is made of a polybutylene terephthalate plastic / fluoroplastic composite material; Preferably, the material of the central reinforcing rib comprises a glass fiber reinforced polyester resin composite material; Preferably, the thickness of the semi-conductive rubber insulating layer is 1-2 mm.

5. The optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 4, characterized in that: The filling strip is obtained by vulcanization in a vulcanization pipe; Preferably, the outer shape of the filling strip with a Y-shaped cross-section is composed of six arc segments, the six arc segments include three large concave arc segments and three small concave arc segments, a large concave arc segment, a small concave arc segment, a large concave arc segment, a small concave arc segment, a large concave arc segment and a small concave arc segment are connected in sequence to form a Y-shaped structure; and the three large concave arc segments all match the shape of the power line core, and the three small concave arc segments respectively match the shapes of the ground wire core, the optical fiber unit and the ground wire core.

6. The optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 5, characterized in that: An isolation material is also provided between the core and the inner sheath of the optoelectronic composite wound cable; Preferably, the isolation material comprises any one of a release agent, talcum powder, silicone oil or graphite, or a combination of at least two thereof; Preferably, the inner sheath is an elastomeric rubber inner sheath; Preferably, the thickness of the inner sheath is 2-3 mm.

7. The optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 6, characterized in that: The mesh density of the fiber torsion-resistant layer is 10-20%; Preferably, the outer sheath is an elastomeric rubber outer sheath; Preferably, the thickness of the outer sheath is 2.5-5 mm.

8. A method for preparing the optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 7, the method comprising the following steps: A conductor shielding layer, a power line insulation layer and an insulation shielding layer are sequentially extruded outside the power line conductor to form a power line core; Extruding a ground wire insulation layer outside the ground wire conductor to form a ground wire core; Coating fiber paste on the outside of a number of colored optical fibers, and then extruding a composite loose tube to form an optical fiber core; twisting the obtained multiple optical fiber cores with a central reinforcing rib as the center, and then using multiple filling cotton yarns to fill the gaps, and then wrapping the wrapping tape around the twisted multiple optical fiber cores and the filling cotton rope to form an optical fiber unit; A semi-conductive rubber buffer layer is extruded outside the light unit; A reinforcing member is arranged in the middle of a filling strip having a Y-shaped cross section, and a power core, a ground core, a power core, an optical fiber unit, a power core and a ground core are arranged around the outside of the filling strip in sequence, and are twisted in the right direction with the filling strip as the center to form an optoelectronic composite winding cable core; The photoelectric composite wound cable is extruded with an inner sheath outside the core of the photoelectric composite wound cable, and a fiber torsion-resistant layer is woven and extruded with an outer sheath to obtain the photoelectric composite wound cable for port machinery equipment.

9. The preparation method according to claim 8, characterized in that: Before extruding the inner sheath outside the optoelectronic composite wound cable core, the method also includes the step of coating an insulating material outside the optoelectronic composite wound cable core.

10. An application of the optoelectronic composite wound cable for port machinery equipment according to any one of claims 1 to 7, characterized in that: The applications include use in shore container cranes, rail-mounted container gantry cranes, ship unloaders, stackers and reclaimers or bridge crane reel units.

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