Low-resistance wear-resisting plastic-steel composite cable conduit with middle bonding layer

Abstract

A low-resistance wear-resisting plastic-steel composite cable conduit with a middle bonding layer comprises an inner tube. The inner surface of the inner tube is provided with internal thread grooves continuously in the axial direction of the inner tube. The outer surface of the inner tube is coated with the middle bonding layer in the axial direction of the inner tube. A glass steel tube formed by winding glass fiber soaked in resin is arranged on the surface of the outer side of the middle bonding layer. The low-resistance wear-resisting plastic-steel composite cable conduit with the middle bonding layer is reasonable in structural design; the glass steel tube formed by winding the glass fiber and the inner tube can be closely combined into a whole, the frictional force between the glass steel tube and the inner tube is greatly increased, and separation of the inner tube and an outer tube after stress is avoided; the inner surface of the inner tube is provided with the internal thread grooves continuously in the axial direction of the inner tube, the contact area between a cable and the inner surface of the inner tube is small, the friction surface is small, generated frictional force is small, and therefore the difficulty in cable penetration is lowered; the cable and the inner tube are supported by spiral salient points and suspended above pits, so that ventilation and heat dissipation space is enlarged; since heat generated by the cable can be easily dissipated, the service life of the cable is greatly prolonged, and the running safety of a power grid is guaranteed.

Description

Technical field: [0001] The invention relates to a low-resistance and wear-resistant plastic-steel composite cable guide with an intermediate bonding layer. 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] The advantages of FRP cable protection pipes: (1) FRP pipes are light in weight, high in rigidity, and strong in compressive and subsidence resistance; (2) Large in thermal conductivity, especially when cables are operated underground for a long time; (3) Resistance to temperature differences Well, the service life can reach 50 years in the environment of -40℃~-150℃. FRP cable protection pipes are of uneven quality due to defects in the process itself and...

AI Technical Summary

Problems solved by technology

Later, through repeated development, two pipes of different materials can be tightly combined into a whole through the intermediate bonding layer. However, the inner surface of the inner pipe is flat and has a large friction area. , the contact area between the cable and the inner surface of the inner tube is large, the friction surface is large, and the friction force generated is large, which increases the power of the cable tractor. At the same time, the heat generated during the operation of the cable is not easy to dissipate. unfavorable

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