Using method used for PVC pipe sleeving of circuit control line and capable of realizing good anti-dew effect

Abstract

The invention discloses a using method used for PVC pipe sleeving of a circuit control line and capable of realizing the good anti-dew effect. According to the using method, a plurality of drainage holes (11) are formed in the bottom of an outer layer PVC pipe (1); an electrical control line (3) is arranged in an inner layer PVC pipe (2), the inner layer PVC pipe (2) and the outer layer PVC pipe (1) are connected in a clamped mode, and a certain drainage space (4) is formed between the inner layer PVC pipe (2) and the outer layer PVC pipe (1); and the inner wall of the outer layer PVC pipe (1)is bounded with a first rubber and plastic heat-insulation layer (5), and the outer wall of the inner layer PVC pipe (2) is bounded with a second rubber and plastic heat-insulation layer (6). According to the using method, dew formed between the inner layer PVC pipe and the outer layer PVC pipe does not make contact with the inside electrical control line, thus the risk that the electrical control line is corroded is lowered, the service life of the electrical control line is prolonged, and meanwhile, the heat-insulation effect is further improved through the first rubber and plastic heat-insulation layer and the second rubber and plastic heat-insulation layer.

Description

technical field [0001] The invention relates to the field of circuit engineering, in particular to a method for using a PVC pipe socketed for a circuit control line with good anti-dew effect. Background technique [0002] PVC pipe (PVC-U pipe) Rigid polyvinyl chloride pipe is made of polyvinyl chloride resin, stabilizer, lubricant, etc., and is extruded by hot pressing. It is the earliest plastic pipe that has been developed and applied. PVC-U pipe has strong corrosion resistance, easy bonding, low price and hard texture. There are several acceptance criteria in weak current hydropower projects, one of which is the requirement for circuit engineering that all electrical control lines and lines must wear PVC pipes. [0003] In the prior art, the electrical control wires and circuits are directly passed through the PVC pipe. If the external temperature of the PVC pipe drops, water dew will form inside the PVC pipe under the influence of the external temperature drop, and the...

AI Technical Summary

Problems solved by technology

If the external temperature of the PVC pipe drops, water dew will form inside the PVC pipe under the influence of the external temperature drop, and the water dew will corrode the outer layer of the electrical control line and the circuit, thereby affecting the electrical control line and the circuit. service life

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