A production process of composite cable guide with thread groove

Abstract

The invention discloses a production technology of a composite cable duct with a thread groove. The production technology comprises the following steps: installing a grooving machine between a dragger and a tube drawing machine of a pipe making device, preparing an inner tube with the pipe making device, when the dragger drives the inner tube to go forward in a machining sleeve of the groove, starting the grooving machine, processing the thread groove at the outer surface of the inner tube by the grooving machine, enabling the inner tube machined with the thread groove to enter the tube drawing machine, and cutting the designated length of the inner tube with the thread groove according to the requirement, moving the cut inner tube with the thread groove to a glass fiber reinforced plastics twisting production line, and continuously twisting the glass fibers onto the outside of the inner tube with the thread groove, so as to form a glass reinforced plastic pipe encircling the inner tube. The glass reinforced plastic pipe and the inner tube can be tightly combined to be a whole; the friction force between the glass reinforced plastic pipe and the inner tube is greatly increased, so that the slip-out phenomenon of the inner tube from the outer tube is avoided; the heat conductivity coefficient is large; the defects that the inner wall of the glass reinforced plastic pipe is not wear resistant and easy to loose glass fiber are avoided; the cable is easy to pass through the cable duct, so that the situation of cable blockage is avoided.

Description

Technical field: [0001] The invention relates to a production process of a composite cable guide with thread grooves. Background technique: [0002] There are basically two types of pipe materials used for plastic cable protection in the market, one is thermosetting plastics, mainly fiberglass pipes, and the other is thermoplastics, mainly PVC, polyethylene, and polypropylene pipes. The advantages and disadvantages of the pipes of these two types of materials are as follows: [0003] Advantages of FRP cable protection pipes: (1) FRP pipes are light in weight, high in rigidity, and strong in compression and subsidence resistance; (2) Large in thermal conductivity and good in flame retardancy, especially when cables are operated underground for a long time; (3) Good weather resistance, the service life can reach 50 years in the environment of -40 ℃ ~ 150 ℃. FRP cable protection pipes are still the preferred pipes in the typical design of the State Grid Corporation of China. ...

AI Technical Summary

Problems solved by technology

There has been a composite cable protection tube in the market that utilizes the advantages of thermoplastic materials and thermosetting materials to organically combine FRP and polypropylene. However, it simply uses FRP as the outer tube and polypropylene as the inner tube. The method of direct combination, because thermoplastic is a very typical non-polar crystalline material, has low surface tension, large shrinkage rate, poor creep resistance, poor dimensional stability of the product, and is prone to warping deformation. It is difficult to combine with other The materials are adsorbed together, resulting in a gap between the pipes of the two materials, and even in the process of pulling the cable, the inner pipe will be pulled out, which cannot meet the purpose required by the market

Later, after repeated development, the pipes of two different materials were tightly combined into a whole through the intermediate bonding layer. However, in actual research and development, the biggest disadvantage of producing pipes through the intermediate bonding layer is that the bonding force cannot meet the requirements. The required shearing force and tear resistance requirements, it is still easy to cause the inner tube and the outer tube to split and slip when the cable is pulled, which is not conducive to the popularization and use of the product

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