CN203311889U - Towline cable - Google Patents

Abstract

The utility model is a towline cable, and its structure includes a conductor, insulation, tensile core, inner sheath, and outer sheath, wherein the periphery of the conductor is irradiated ethylene-propylene rubber insulation, and the periphery of the irradiated ethylene-propylene rubber insulation is low-temperature-resistant Elastomeric inner sheath surrounded by a soft polyurethane outer sheath. Its preparation process: use a wire and cable stranding machine to twist tinned copper wire as a conductor; use an extruder to extrude environmentally friendly irradiated ethylene-propylene rubber insulation outside the conductor; twist high-strength tensile fiber wires with a twisting machine, The outer layer is extruded with extruder equipment to make soft PVC as the tensile core; then the insulated wire core and the tensile core are twisted together with the cable forming machine; For the sheath. Advantages: The cable has the characteristics of high mechanical strength, softness, high wear resistance, aging resistance, crack resistance, mildew resistance, moisture resistance and acid and alkali corrosion resistance, and has soft characteristics under low temperature conditions. It is suitable for weapon electronics, high-end civilian use, etc. special environment.

Description

drag chain cable

technical field

The utility model is a towline cable. The towline cable can adapt to work in narrow and harsh environments such as weapons, electronics, and high-end civil applications. It has high mechanical strength, high wear resistance, aging resistance, cracking resistance, mold resistance, moisture resistance and acid resistance. Alkali attack characteristics, with excellent mechanical and electrical properties.

Background technique

At present, there is no relevant drag chain cable standard in the cable industry. On the basis of referring to GB/T 5023-2008 PVC insulated cables with rated voltage of 450/750V and below, the relevant performance of the product in special environments is added: ①Cold resistance; ②Salt spray resistance; ③Moisture resistance; ④Aging resistance; ⑤Mold resistance and other properties, fully considering special requirements such as high strength, softness, etc. It is formulated according to the special requirements of users, fully considering its applicability and reliability, fully considering the special requirements of tensile strength, low temperature resistance, softness, wear resistance, etc., and meeting the requirements of various use environments. The rationality of the design has been verified by physical sample tests. sex and reliability.

Contents of the invention

The utility model proposes a drag chain cable. During the dragging process, the drag chain cable is subjected to a large pulling force, and an anti-tension core is added to the cable to provide the strength of the cable; the elastic body sheath material, the sheath material Excellent wear resistance, maintains good flexibility at low temperature -45°, but the surface of the sheathed cable is not smooth after one extrusion, and the surface of the cable is flattened by two extrusions by adjusting the mold; the conductor is made of multi-strand monofilaments bundled together , The pitch ratio is 5-6 times, which improves the flexibility of the cable.

The technical solution of the utility model: drag chain cable, its structure includes conductor, insulation, tensile core, inner sheath, outer sheath, wherein the periphery of the multi-strand tinned copper wire conductor is extruded by extrusion equipment Irradiated ethylene propylene rubber insulation, the periphery of the irradiated ethylene propylene rubber insulation is a low temperature resistant elastomer inner sheath extruded by extruder equipment, and the outer periphery of the low temperature resistant elastomer inner sheath is extruded by extrusion equipment to extrude soft polyurethane outer sheath .

Its preparation process, including

1) Strands of tin-plated annealed copper wires are stranded by a beam machine, and the minimum diameter of the single wire is 0.10mm as the conductor;

2) Extrude ethylene-propylene rubber insulation with 45-type extruder equipment, the insulation material is made of soft material, and the temperature is -50～+85℃;

3) Use a cable forming machine to twist the insulation and high-strength tensile cores with para-aramid yarns. The tensile cores are placed in the middle, and the insulated wire cores are arranged around the tensile cores to form cables together;

4) Extrude the low temperature resistant elastomer inner sheath with 65 type extruder equipment;

5) Extrude the outer sheath with a 65-type extruder, using a double-flight screw with a compression ratio of 25:1:

By adjusting the mold, the surface of the cable is flattened by two extrusions; the conductor is twisted together with multiple monofilaments, and the pitch ratio is 5-6 times, which improves the flexibility of the cable;

The inner and outer sheath materials are made of soft materials, and the temperature is -50～+85℃.

The utility model has the following advantages:

1) The mechanical strength of the cable is high: a high-strength tensile core is added to the cable, which can adapt to the uninterrupted work in the field environment;

2) Low temperature resistance: The cable can be laid and installed normally at -50°C, which can solve the problems of hardening and embrittlement of general materials due to low temperature laying, so as to meet the use requirements of low temperature environments;

3) Working temperature: the insulation and sheath materials are made of soft materials, and the temperature should be used for a long time in the range of (-50～+85) °C;

4) Flexibility: The conductor is made of multi-strand tinned copper wire, the minimum diameter of which is only 0.10mm, and soft insulating material is used, which increases the flexibility of the cable and reduces the laying space;

5) "Three-proof" test: meet the requirements of anti-mold, anti-salt spray, anti-humidity and heat in GJB150;

6) Wear resistance: the cable has good wear resistance and is easy to drag during installation;

7) Since the sheath material is made of low temperature resistant elastomer sheath material, the mold growth level on the surface of the sheath is not greater than level 2. After the damp heat and salt spray test, the appearance of the sheath has no damage; the flow performance of this material is not good. Out of the sheath, the appearance of the cable is uneven. By adjusting the mold and extruding it twice, the appearance is smooth and the bonding is tight.

Refer to GB/T 5023-2008 On the basis of PVC insulated cables with a rated voltage of 450/750V and below, the relevant performance of the product in special environments has been added: ①Cold resistance; ②Salt spray resistance; ③Moisture resistance; ④Aging resistance; ⑤ Mold resistance and other properties, fully considering special requirements such as high strength and softness, and the rationality and reliability of the design have been verified by physical sample tests. The product has excellent mechanical and electrical properties.

Description of drawings

Figure 1 is a schematic diagram of the structure of the towline cable product.

Figure 2 is a flow chart of the preparation process of drag chain cable products.

In the figure, 1 is a conductor, 2 is an insulation, 3 is a tensile core, 4 is an inner sheath, and 5 is an outer sheath.

Detailed ways

Referring to accompanying drawing 1, the structure of drag chain cable products includes conductor 1, insulation 2, tensile core 3, inner sheath 4, outer sheath 5, wherein the periphery of multi-strand tinned copper wire conductor 1 is extruded Extruded irradiated ethylene propylene rubber insulation 2, the outer periphery of irradiated ethylene propylene rubber insulation 2 is a low temperature resistant elastomer inner sheath 4 extruded by extruder equipment, and the outer periphery of the low temperature resistant elastomer inner sheath is extruded by extrusion equipment A soft polyurethane outer sheath5.

Comparing with Figure 2, the preparation process of towline cable products, 1) strands of tinned annealed copper wires are stranded by the beam machine, and the minimum diameter of the single wire is only 0.10mm as the conductor 1, 2) extruded with 45-type extruder equipment Ethylene-propylene rubber insulation 2, 3) Use a cable forming machine to insulate 2 and high-strength tensile core 3 (twisted with para-aramid yarn, place the tensile core in the middle, and arrange the insulated wire cores on the tensile core 4) Extrude the inner sheath 4 of the low temperature resistant elastomer with the 65-type extruder equipment, 5) Extrude the outer sheath 5 with the 65-type extruder equipment. the

By adjusting the mold, the surface of the cable is flattened by two extrusions; the conductor is twisted together with multiple monofilaments, and the pitch ratio is 5-6 times, which improves the flexibility of the cable;

Insulation and sheath materials are made of soft materials, the temperature is -50 ~ +85 ℃.

Example

The sheath material adopts the extrusion process of low temperature resistant elastomer sheath material, extruded with 65-type extruder equipment, and adopts a double-flight screw with a compression ratio of 25:1:

Process flow: preparation—mold matching—heating—adjustment of mold—extrusion control—completion

1) Preparation: equipment inspection, electrical inspection, turning on the power of the equipment, preparing production tools and product process cards;

2) Mold matching: the inner diameter of the mold core d = the outer diameter of the stranded wire + (0.20 ~ 0.50) mm, the inner diameter of the mold sleeve = the nominal outer diameter of the finished product + (-0.1 ~ 0.1) mm; after the mold is determined, install the filter, Filter plate and die head, and feed after confirming that there is no debris in the hopper;

3) Heating: After turning on the heating power, set the temperature of each section according to the extruded material: the first zone (152±5)℃, the second zone (160±5)℃, the third zone (170±5)℃, the fourth zone Area (178±5)°C, flange (165±5)°C, machine head (178±5)°C, die opening (175±5)°C; after the temperature and holding time are reached, check whether the sheath material is plasticized normal;

4) Adjust the mold: use extrusion extrusion, adjust the eccentric core, start the machine and wait for the tubular plastic to be extruded horizontally, mark it, cut it off and cool it in water, and check whether the cross section of the empty tube is eccentric;

5) Extrusion control: put on the cable core, connect the traction rope, start the main engine, and pay attention to observe that the surface quality of the extruded plastic should be bright, round and tightly packed;

6) Completion: After cleaning the die head, first turn off the power supply of the heating section, then turn off the power supply of the main control cabinet, and then turn off the power supply of the power distribution cabinet; then inspect the relevant power supply and water source, and finish after everything is done.

Claims (1)

1. drag chain cable, it is characterized in that structure comprises conductor, insulation, tensile core, inner sheath, oversheath, the periphery of wherein adopting multiply tinned copper wire conductor is that the irradiation that adopts extrusion equipment to extrude is ethylene propylene rubber insulated, the ethylene propylene rubber insulated periphery of irradiation is the low temperature resistant elastomer inner sheath of extruding with extruder equipment, low temperature resistant elastomer inner sheath periphery is to adopt extrusion equipment to extrude soft polyurethane oversheath, and the inner/outer sheath material temperature is at-50～+ 85 ℃.

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