JPS6263298A - Method of removing heat-insulating layer of heat-insulating pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a method for removing a heat insulating layer at the end of a heat insulated pipe.

[Prior Art] In recent years, the number of pipelines using plastic pipes has increased, and the use of insulated pipes in which plastic pipes are covered with foamed plastic as a heat insulating layer is also increasing.

Incidentally, insulated pipes are sometimes provided with a heat insulating layer for heat retention in advance during the production process. When constructing a pipeline using such an insulated pipe, the insulating layer must be removed from the pipe body before the insulated pipe is connected, and the connection portion must be insulated after the pipe body is connected. When removing the heat insulating layer, only the length of the heat insulating layer required to connect the pipe body is removed, but it is important to avoid damaging the pipe body at this time.

However, due to the nature of insulated pipes, the pipe body and the insulating layer are in close contact with each other, so it is extremely difficult to cut only the insulating layer with a knife such as a cutter, and it is easy to damage.
Further, there was a problem that workability was extremely poor.

Generally speaking, when the insulation layer is made of foamed plastic, the insulation layer and the pipe body may be in close contact with each other, so it is necessary to cut the insulation layer in the circumferential direction at the end of the insulation layer and then remove the insulation layer. Another problem was that it was difficult to remove from the pipe body.

[Means for Solving the Problems] The method for removing a heat insulating layer of a heat insulating pipe according to the present invention allows cutting the heat insulating layer without causing damage to the pipe body,
The insulating layer at the end that should be roughly removed can be easily removed, and the in-core is a short pipe with an inner diameter slightly larger than the outside diameter of the pipe body, with a handle attached to one end. It is inserted from the end of an insulated pipe that has a heat insulating layer directly above the pipe body, and the heat insulating layer is cut by placing a cutter for cutting the heat insulating layer on the short pipe, and then the heat insulating layer is removed together with the in-core. be.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an example of a jig used to carry out the present invention, and in the figure, 1 is a metal in-core having a tubular main body 2 and a flange-like handle 3. . Main body part 2
The tube may be a short tube with the same diameter at the front or rear end, but it is preferable to have a tapered tube with a narrower diameter toward the tip. The tip varies depending on the thickness and taper of the short pipe, but the blade 21
is preferably formed. The length of the main body portion 2 may be determined depending on the length of removal of the heat insulating layer.

Next, a procedure for removing the heat insulating layer of the heat insulating pipe using the above-described in-core 1 will be explained with reference to FIG. 2.

4 is a heat insulating pipe, and a heat insulating layer 44 is provided on the pipe body 41, which is composed of a heat insulating part 42 covered with foamed plastic and a protective layer 43 formed by covering the heat insulating part 42 with polyethylene or vinyl. It is being

In the in-core 1, the inner diameter of the main body part 2 is made larger than the outer diameter of the pipe main body 41, and the main body part 2 is pushed in with the blade 21 positioned slightly outside the pipe main body 41. The main body part 2 is located at the part where the knife 5 is placed to peel off the heat insulating layer 44.
is fixed, and a cut 6 is made in the heat insulating layer 44. Afterwards,
The stripped portion 45 is removed together with the in-core 1.

Note that the in-core 1 may be divided into two along the axial direction, and the handle can be roughly shaped to be convenient for work.

[Effects] As mentioned above, the method for removing the heat insulation layer of the heat insulation pipe of the present invention has the following effects:
Insert the in-core, which has a handle attached to a short pipe with an inner diameter slightly larger than the outside diameter of the pipe body of the insulated pipe, from the end of the insulated pipe, making sure that it does not come into contact with a knife, and then make a cut in the insulation layer. Later, remove the insulation layer from the end.

Therefore, there is no risk of the knife damaging the pipe body.
You can work with peace of mind, and the insulation layer at the end can be easily removed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of a jig used to carry out the present invention, and FIG. 2 is an explanatory diagram of an embodiment of the present invention in which the jig shown in FIG. 1 is used to remove an insulated pipe. . In the figure, ■ is the in-core, 2 is the main body, 3 is the handle,
4 is an insulated pipe.

Claims (1)

[Claims] Insert the in-core, which has a handle on one end of a short pipe with an inner diameter slightly larger than the outside diameter of the pipe body, directly above the pipe body of an insulated pipe that has a heat insulating layer on the pipe body. A method for removing a heat insulating layer of a heat insulating pipe, which is characterized by placing a heat insulating layer cutting tool on the pipe to cut the heat insulating layer, and then removing the heat insulating layer together with an in-core.