Sand inclusion steel-plastic complex cable guide pipe

Abstract

A sand inclusion steel-plastic complex cable guide pipe comprises a glass reinforced plastic pipe and a sand inclusion pipe arranged therein, wherein the sand inclusion pipe comprises an inner pipe and a quartz sand layer which is composed of quartz sand grains and is extruded onto the outer surface of the inner pipe; the quartz sand layer covers the outer surface of the inner pipe in the circumferential direction and extends to two ends in the axial direction. According to the invention, the quartz sand layer is additionally arranged between the inner pipe and the glass reinforced plastic pipe to tightly integrate the inner pipe and the glass reinforced plastic pipe; the friction between the inner pipe and the glass reinforced plastic pipe is greatly increased to avoid sliding of the inner pipe from an outer pipe; the sand inclusion steel-plastic complex cable guide pipe has good mechanic performance, high intensity, corrosion resistance, heat resistance, inflaming resistance, insulation property and anti-aging property, and not only exerts the advantages of the glass reinforced plastic pipe, but also avoids the deficiencies of poor wear resistance and filoselle; as the cable can penetrate easily, the condition that the cable is stuck is avoided.

Description

Technical field: [0001] The invention relates to a sand-inserted steel-plastic composite cable guide. 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. However, due to ...

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

Images