A flame retardant cable used in underground coal mines
A technology for flame-retardant cables and coal mines, which is applied to insulated cables, cables, circuits, etc., and can solve problems such as damage, cable burning, and leakage of flame retardants.
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Embodiment 1
[0034] Example 1: Flame Retardant Cable
[0035] like figure 1 and figure 2 As shown in the figure, the flame-retardant cable for underground coal mines in this embodiment sequentially includes a conductor core 1, a conductor shielding layer 2, an insulating shielding layer 3, a waterproof layer 4, a support cage 5, an anti-skid layer 6, an outer protective layer from the inside to the outside. Set of 7. The conductor shielding layer 2 is a non-metallic shielding layer made of polyethylene, styrene-butadiene rubber and carbon black, and is evenly wrapped around the outer circumference of the conductor core 1. The insulating shielding layer 3 is made of steel tape overlapped and wrapped around the conductor shielding layer. 2. The outer circumference is formed. The waterproof layer 4 is formed by overlapping the cable non-woven fabric on the outer circumference of the insulating shielding layer 3. The outer surface of the waterproof layer 4 is evenly arranged along the axis....
Embodiment 2
[0036] Example 2: Preparation of flame retardant cable one
[0037] The expanded graphite used in this example was purchased from Qingdao Yanhai Material Company, and the initial expansion temperature was about 160°C. The high-density polyethylene capsule was purchased from Xinduomei Company, the melting point was about 150°C, the volcanic stone was red volcanic stone, and the zeolite was high silica zeolite.
[0038] Preparation of foaming agent:
[0039] Measure the sodium hydroxide solution with a concentration of 25wt% and the ethanol solution with a concentration of 65wt%, and mix them according to the volume ratio of 1:1 to obtain a sodium hydroxide-ethanol solution; crush 100g of volcanic stones to 0.5-0.7mm , washed with 15wt% ethanol solution, calcined at 200 ℃ for 1.5h, placed the calcined volcanic stone in the reaction kettle, added sodium hydroxide-ethanol solution, and then heated the reaction kettle to 100 ° C, take out after 24 hours of reaction, wash to obtain ...
Embodiment 3
[0055] Example 3: Preparation of Flame Retardant Cable II
[0056] The expanded graphite used in this example was purchased from Qingdao Yanhai Material Company, and the initial expansion temperature was about 160°C. The high-density polyethylene capsule was purchased from Xinduomei Company, the melting point was about 150°C, the volcanic stone was red volcanic stone, and the zeolite was high silica zeolite.
[0057] Preparation of foaming agent:
[0058] Measure the sodium hydroxide solution with a concentration of 25wt% and the ethanol solution with a concentration of 65wt%, and mix them according to the volume ratio of 1:1 to obtain a sodium hydroxide-ethanol solution; crush 200g of volcanic stones to 0.5-0.7mm , washed with 15wt% ethanol solution, calcined at 220 ℃ for 1 hour, placed the calcined volcanic stone in the reaction kettle, added sodium hydroxide-ethanol solution, and heated the reaction kettle to 100 ℃ ℃, take out after 24 hours of reaction, wash to obtain th...
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Abstract
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