Manufacturing process of extruded insulated fire-resistant power cable
A power cable and extruded insulation technology, which is applied in the direction of insulated cables, cable/conductor manufacturing, insulated conductors, etc., can solve problems such as unfavorable flame penetration, hidden safety hazards in fire rescue work, damage to cable insulation layers, etc., to eliminate potential safety hazards , reduce penetration, and ensure the effect of fire performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] refer to figure 1 , which is a manufacturing process of an extruded insulated fire-resistant power cable disclosed by the present invention, combined with figure 2 shown, including the following steps:
[0033] S1, prepare materials, prepare φ3mm round copper wire.
[0034] S2, continuous drawing and continuous withdrawal, the round copper wire is drawn to the required specification through the wire drawing die, and softened (recrystallized) by the current heater at the same time. After the copper wire is softened, not only the conductivity is greatly enhanced, but also it is easy to process. Improves the softness of the product. After repeated pulls and retreats, the process inspection will be carried out.
[0035] S3. Twisting system. Multiple monofilament copper wires are arranged and twisted into a copper core 1. The twisted cable product is more flexible, easy to lay and install, and has more stable electrical conductivity while enhancing mechanical properties....
Embodiment 2
[0048] refer to figure 1 , figure 2 , the difference between this embodiment and Embodiment 1 is:
[0049] 1. Step S81 is: extrude the polyvinyl chloride inner sheath 8, heat and plasticize the polyvinyl chloride plastic through an extruder into a viscous fluid state, and then extrude it on the refractory layer 7 through an extrusion die, so that the refractory layer 7 The structure plays a certain protective role, and has the functions of heat insulation, cooling and isolation.
[0050] 2. Step S9 is: extrude the outer sheath 10 of polyvinyl chloride, heat and plasticize the polyvinyl chloride plastic through an extruder into a viscous fluid state, and then extrude it on the insulating wire core or the armor layer 9 through an extrusion die, Therefore, it has a certain protective effect on the internal structure of the cable, and can block and delay the spread of flames to a certain extent when burning, gaining valuable time for effective disposal.
Embodiment 3
[0052] refer to figure 1 , figure 2 , the difference between this embodiment and Embodiment 1 is: for multi-core cables, in step S6, the isolation layer 6 is formed by wrapping the insulated wire core with a silicone rubber tape, and the helical direction of the insulation layer 6 is the same as that of the multi-core cable. When the insulated wire cores are cabled, the helical direction of twisting is the same. When the isolation belt is tightened, the isolation belt has a further compression effect on the twisting direction of the insulated wire cores to prevent the insulated wire cores from being scattered.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More