This issue introduces a ceramic silicone rubber insulated fire-proof cable.
The invention discloses a ceramic silicone rubber insulated fire-proof cable, which comprises a cable core. The cable core is twisted by several insulating wires, filled with flame retardant filling at the inner gap of the cable core, wrapped with armor layer outside the cable core and wrapped with outer sheath. The insulating wire core consists of an intermediate conductor and a ceramic silicone rubber insulating layer coated outside the conductor; the invention realizes large length, large specification production, relatively soft products, convenient installation and laying, fewer intermediate joints, and fully meets the standard requirements of mineral insulated cables.
1. A ceramic silicone rubber insulated fire-proof cable is characterized in that it comprises a cable core, which is twisted by several insulating cores, filled with flame retardant filler (3) in the gap of the cable core, wrapped with armor layer (4) outside the cable core and wrapped with outer sheath (5).
2. The ceramic silicone rubber insulated fire-proof cable described in Fig. 1 is characterized in that the insulated wire core is composed of a conductor (1) and an insulating layer (2) enclosed outside the conductor (1).
3. The ceramic silicone rubber insulated fire-proof cable described in the Fig. 1 is characterized by: the outer sheath (5) adopts low smoke non-toxic plastic material.
4. The ceramic silicone rubber insulated fire-proof cable described in Fig. 1 or 2 is characterized by: the insulating layer (2) is made of ceramic silicone rubber material.
technical field
The invention belongs to the field of power cables, in particular to a ceramic silicone rubber insulated fire-proof cable.
Background Technology
At present, mineral insulated cables are widely used in the market. The copper conductor core, copper outer sheath and insulating layer of traditional mineral insulated cable are compact. It has been produced and used in foreign countries for nearly 80 years, and in domestic production and use for nearly 20 years. It has been widely used in many large projects at home and abroad, and the effect is very good. Art is more complex, the price is more expensive, the hardness is larger, the construction is not easy to bend, so whether from the aspect of cost reduction or construction technology, the length of the order must be quite accurate. At the same time, because the cable cross-section area is larger than 25 mm2 can only be produced into a single core, and the cable length is limited by the maximum delivery length, it is not realistic to place an order directly according to the length of each cable required by the site, so it is necessary to arrange and combine all types of cables reasonably, so that the length of each cable ordered is close to that of each cable ordered. The maximum length of delivery of the manufacturer is exactly equal to the sum of the lengths of several cables actually required on site. As a result of the above factors, mineral insulated cables are not easy to form mass production, installation is difficult, resulting in poor economic benefits.
summary of the invention
The technical problem to be solved by the invention is to provide a ceramic silicone rubber insulated fire-proof cable with good fire resistance, good flexibility, good corrosion resistance, convenient installation and laying, and low cost, which can be produced in large specifications.
The invention relates to a ceramic silicone rubber insulated fire-proof cable, which comprises a cable core. The cable core is twisted by several insulating wires, filled with flame retardant filling at the inner gap of the cable core, wrapped with armor layer outside the cable core and wrapped with outer sheath. The insulating wire core is composed of a conductor and an insulating layer coated outside the conductor.
The outer sheath adopts low smoke non-toxic plastic material.
The insulating layer adopts ceramic silicone rubber material.
The beneficial effects of the present invention lie in:
The invention adopts ceramized silicone rubber as insulation, which has very good fire-proof, fire-resistant, flame-retardant, low smoke and non-toxic properties. At the same time, the residue after burning is ceramic-like hard shell, which does not melt and drip in the fire (650-1300 C). The circuit is smooth in the case of fire and plays a solid protection. Effect. It can overcome the weaknesses of existing mineral insulated cables, achieve large length, large specifications of production, product is relatively soft, easy installation and laying, fewer intermediate joints, performance fully meet the standard requirements of mineral insulated cables. In addition, the sheath made of plastic material with low smoke and non-toxicity has good anti-corrosion characteristics.
Specific implementation methods
As shown in Fig. 1, the ceramic sil