Flexible fire-resistant branch cable with anti-vibration and anti-spraying performances

Abstract

The invention relates to the technical field of cables, in particular to a flexible fire-resistant branch cable with anti-vibration and anti-spraying performances. The flexible fire-resistant branch cable comprises a main cable body and a branch cable connected to the middle of the main cable body. A branch connection body sleeves the outer walls of the main cable body and the branch cable and consists of an inner layer, a middle layer, and an outer layer that are connected successively from inside to outside; the inner layer is a ceramic oxygen-barrier mud layer, the middle layer is a stainless steel armor layer, and the outer layer is a ceramic silicone rubber layer; and the space among the main cable body, the branch cable, and the middle layer is filled with ceramic oxygen-barrier mud.The flexible fire-resistant branch cable has the good incrustation effect to avoid the melted dripping effect; the cable having the excellent high-temperature resistant, fire-resistant, and seismic-resistant performances is not easy to crack; and because of the good anti-spraying performance, the service life of the cable is prolonged.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an earthquake-resistant and spray-resistant flexible fireproof branch cable. Background technique [0002] Fireproof cables are being recognized by more and more users for their excellent fire resistance and environmental protection. Fireproof branch cables are a new type of cable derived from fireproof cables. At present, fireproof branch cables have been gradually applied in In basic industries and civil buildings, fireproof branch cables are divided into rigid fireproof branch cables and flexible fireproof branch cables. [0003] Rigid fireproof branch cables are generally branched in the form of branch boxes, in which the main line enters the branch box, and the branch cores are led out from the branch box. This method needs to be operated on the construction site, and the installation is cumbersome and unreliable, and the branch box itself is not fireproof. , Not waterproof,...

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Problems solved by technology

[0003] Rigid fireproof branch cables are generally branched in the form of branch boxes, in which the main line enters the branch box, and the branch cores are led out from the branch box. This method needs to be operated on the construction site, and the installation is cumbersome and unreliable, and the branch box itself is not fireproof. , not waterproof, unable to meet the requirements of rigid fireproof cables to continue to maintain power when a fire occurs

[0004] Existing flexible fireproof branch cables generally use branch connectors for branching, but the sealing performance of this kind of flexible fireproof branch cables is poor, and it cannot be guaranteed to pass the fire resistance and waterproof test in the BS6387 standard (at a temperature of 650°C ± 40°C , sprinkle water and continue to be exposed to fire for 15 minutes, and the cable line can remain intact), in the prior art, the application number is "201520878653.X", the patent name is "a flexible fireproof branch cable", and its technical means is "inner filling of branch connector There is oxygen barrier mud with fireproof performance, and the oxygen barrier mud is made of halogen-free, low-smoke, flame-retardant and low-toxicity materials.” Although the existing technology can play a role in fire prevention, it can also pass the experiment at a temperature of 650°C±40°C. However, the applicant believes that it still has defects, which are specifically manifested in: first, the temperature of the fire-resistant branch cable is too low during the fire-resistant and waterproof test, and the fire-resistant test is only carried out according to the BS8491 standard, and the fire-proof and fire-resistant test is not carried out according to the BS6387 standard. The current standard test temperature for refractory combustion is 950°C, that is, most of the experiments are carried out according to the BS6387 standard, so better refractory performance is required to meet the experimental requirements of higher and higher standards; It is made of halogen-free, low-smoke, flame-retardant and low-toxic materials. Although it can play the role of flame-retardant, it cannot be crusted and cannot withstand the spray vibration test. When the temperature is too high, it will melt and drip, and the fire and melt resistance is still insufficient.

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