JPS622015A - Method of laying water cooled pipe - Google Patents

Abstract

PURPOSE:To carry out a laying operation while eliminating the winding tendency of a water cooled pipe by connecting a rope on the end of a plastic water cooled pipe and, after making pass this rope through a laying hollow passage, pulling this rope to make said water cooled pipe pass through said hollow passage under a tense condition. CONSTITUTION:First, a rope is made pass through a hollow passage through which a pipe is to be laid, and its end is connected to the end of the pipe to be laid. Then, the rope is pulled by means of a winch and is gradually drawn out of the hollow passage and, accompanying to this, the pipe connected to the rope is advanced through the hollow passage. Thereby, during this time, the pipe can be advanced through the hollow passage without developing a winding tendency (a swell) and under a tense condition, and is kept laid down.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to how to pass a water-cooled pipe through a tunnel when it is being laid in a tunnel.

``Prior art'' Conventionally, when installing plastic water-cooled pipes, the water-cooled pipes were wound around a drum and stored. During the installation, the drum was carried to the site, the water-cooled pipes were fed out from the drum, and an electric machine was used to install the water-cooled pipes. There was a method in which the cables were forced into the interior through the entrance of an underground tunnel, and the tunnel was advanced through the tunnel. This method involves pushing a water-cooled pipe into an underground tunnel.
In this case, no tension is applied to the water-cooled pipe between the tip and the electric pushing machine.

[Problems to be Solved by the Invention] However, in the prior art as described above, especially in recent years when water cooling pipes have become larger in diameter, the water cooling pipes that have been fed out from the drum have undulations left by the winding of the drum. ) remains, which poses a problem when passing a water-cooled pipe with such swells through a confined space such as a trough, and it takes a lot of time to correct the swells in the water-cooled pipe. .

U Means and operation for solving the problems] The present invention solves the problems in the prior art as described above, and provides a new method for installing a plastic water-cooled pipe in a sinus without any trouble. Then, the plastic water-cooling tube that is wound and stored in the drum is let out from the drum.
In the method of laying the water-cooled pipe in a tunnel, a wire or rope is connected to the tip of the water-cooled pipe, and after passing the wire or rope through the tunnel, it is pulled by a winch or the like, and thereby the water-cooled pipe is This method of laying a water-cooled pipe is characterized by passing the water-cooled pipe into a sinus tract while tensioning the water-cooled pipe between the leading end and the drawing side.

The present invention will be explained in detail below.

Plastic water-cooled pipes are continuously molded using an extrusion molding machine, and the molded tubular body (pipe) is wound around a drum (core), cut into fairly long predetermined lengths, and stored in the drum. The pipes housed in this drum are transported to the installation site to be used as water-cooled pipes. At the installation site, the pipe that is unwound from the drum is passed through an electric machine, which allows it to be powerfully pushed out and sent out.
It is possible to forcefully push into the tunnel.

At the site, first wire (
or a rope). The end of the wire passed through the tunnel is connected to the tip of the pipe to be laid.

The other end of the wire connected to the pipe is placed on a traction device, such as a winch. The wires are then pulled by a winch and pulled out one by one from the tunnel, and the pipes connected to the wires are unwound by an electric machine and are pulled by the wire at the tip of the pipes as they move through the tunnel. Therefore, during this time, the pipe moves through the tunnel in a tense state without showing any swells in the drum as it is laid.

During this work, it is necessary to adjust the traction speed of the winch and the payout speed of the electric machine to be approximately equal. Preferably, it is important that the electric machine appropriately restricts the unwinding of the pipe while adjusting the winch to apply speed tension so as to prevent the unwinding of the pipe.

The water-cooled pipes laid in this way are connected to predetermined equipment and water sources, and chilled water is supplied to the connected water-cooled pipes as needed.
Water is passed through it and used to cool certain parts of electrical cables, etc.

〔Effect of the invention〕

According to the present invention, it is possible to eliminate or considerably reduce the swell caused by winding the drum of the plastic water-cooled pipe housed in the drum by a simple method, and moreover, this can be done during the installation work. There is no need for extra work to remove swells, and the installation work of water cooling pipes can be carried out simply and easily, which is extremely effective in practical terms.

Claims (1)

[Claims] (1) A method in which a plastic water-cooled pipe wound and stored in a drum is let out from the drum and laid in a tunnel, in which a wire or rope is connected to the tip of the water-cooled pipe, and the wire or rope is laid. The water-cooled tube is passed through the tunnel, and then pulled by a winch or the like, thereby tensioning the water-cooled tube between the feeding side and the tip of the water-cooled tube, while passing the water-cooled tube through the tunnel. How to install water-cooled pipes.