Quick threading method by negative pressure

Abstract

The invention provides a quick threading method by negative pressure. One end of a pre-wire-embedding pipe is connected with a diameter-variable pipe and an air channel in sequence; the cable end of a to-be-threaded cable is connected with a high-elastic and air-tight sponge sphere; one end with the sponge sphere of the cable is placed in the interior of one end, different from one end connected with the diameter-variable pipe, of the pre-wire-embedding pipe; a negative pressure source is started, and the sponge sphere and the cable connected therewith are inhaled to one end, connected with the diameter-variable pipe, of the pre-wire-embedding pipe through suction force, wherein the end plane at one end with a small diameter of the diameter-variable pipe props against the sponge sphere; and the diameter-variable pipe is separated from the pre-wire-embedding pipe, and the cable is drawn out. By creatively adopting the mechanical operation, the method is easy in material taking, simple in operation, quick and convenient, and capable of lowering construction workload; compared with the conventional method, the working efficiency is improved by at least three times; and steel wire traction is not adopted in the whole construction process, so that the operating process of steel wire threading is reduced, and inconvenience brought to construction caused by steel wire cracking can be avoided.

Description

technical field [0001] The invention belongs to the technical field of engineering construction, and in particular relates to a method for fast threading by using negative pressure. Background technique [0002] At present, when we carry out electrical threading construction, the conventional method is to reserve steel wires in the embedded electrical pipes as belt wires, use one end of the steel wires to connect firmly with the wires, and then manually pull the steel wires from the other end of the wire pipes, and use the steel wires to tie the wires together. Out of the embedded pipe, to achieve the purpose of threading. There are many drawbacks in construction like this, at first, because whole process all is to carry out manually, construction labor load is bigger. Secondly, because the wiring of the entire project is not a straight line, but reaches different power consumption points through many turns, it is easy to break the steel wire when threading, which brings in...

AI Technical Summary

Problems solved by technology

There are many disadvantages in such construction. First of all, because the whole process is carried out manually, the construction labor is relatively large.

Secondly, since the wiring of the entire project is not a straight line, but reaches different power consumption points through many turns, it is easy to break the steel wire when threading the wire, which brings inconvenience to the construction

In addition, the entire threading process is carried out manually with bare hands, and the construction efficiency is low. If the steel wire is pulled off, the whole process can only be abandoned halfway, and the steel wire must be re-threaded and threaded again

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