High-strength anti-aging power cable protection sleeve
A technology for power cables and protective sleeves is applied in the field of high-strength and aging-resistant power cable protective sleeves, which can solve the problems of reducing the service life of cables, oxidation of cable skins, and ignition of cable skins, and achieves uniform high and low temperature resistance performance, high resistance High and low temperature performance, the effect of efficient protection
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Embodiment 1
[0023] A high-strength aging-resistant power cable protection sleeve, such as figure 1 and figure 2 As shown, the outer sheath 1 comprising a helical structure, while the inner surface of the outer sheath 1 is provided with an elastic compression strip 2 along the surface centerline of the outer sheath 1, wherein the cross section of the elastic compression strip 2 is trapezoidal, and The long base of the trapezoid is in contact with the surface of the outer sheath 1; the inner diameter of the outer sheath 1 is equal to the outer diameter of the cable, and the height of the trapezoid of the elastic compression strip 2 is 0.4-0.45cm, so by setting the sheath sleeve to a layer The spiral structure is wound directly from one end of the spiral structure during installation, and can be wound directly to the outer surface of the cable, which is convenient to wind. At the same time, because the surface of the outer sheath 1 is provided with a trapezoidal elastic compression strip 2,...
Embodiment 2
[0025] The specific preparation process of the outer sheath is as follows:
[0026] Step 1: Add 100g of hydroxysilicone oil and 900mL of acetone to the reaction vessel at the same time, then add 32g of p-toluenesulfonic acid into it, stir and mix for 20-30min, then add 76g of maleic anhydride into it, heat up to 260-270°C for reflux reaction 24 -28h, then cooled to room temperature, then filtered, washed and dried to obtain cold-resistant polymer;
[0027] Step 2: Add 10g of JQ-4 polyisocyanate to 80mL of toluene solution, then add 5.8g of acrylic acid to it, raise the temperature to 90-100°C, reflux and stir for 5-6h, and then conduct vacuum distillation to obtain a flame retardant crosslinking agent;
[0028] Step 3: Add 640g of polypropylene, 160g of cold-resistant polymer, 60g of allyl trifluoroacetate and 50g of flame retardant cross-linking agent into the internal mixer at the same time, banbury at 180-190°C for 8-10min, and then keep Add 120g of sodium persulfate to th...
Embodiment 3
[0031] The specific preparation process of the outer sheath is as follows:
[0032] Step 1: Add 640g polypropylene, 160g hydroxy silicone oil, 60g allyl trifluoroacetate and 50g flame retardant crosslinking agent to the internal mixer at the same time, banbury at 180-190°C for 8-10min, and then keep the temperature Add 120g of sodium persulfate to the internal mixer without changing, banbury at constant temperature for 3-4 hours, and then cool and degumming;
[0033]Step 2: Put the obtained mixed rubber into the screw extruder, add 20g of quartz powder, 20g of carbon black, 10g of titanate, and 10g of zinc oxide into it at the same time, and melt and extrude it into thin strips. After the head mold is extruded, it is directly wound on the mandrel held by the winding machine, and then cooled by cooling water to shape and then detached from the mandrel to form a spiral outer sheath.
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