CN101684879B

CN101684879B - Method and tool for connecting, repairing and maintaining insulated line pipes

Info

Publication number: CN101684879B
Application number: CN2008101683166A
Authority: CN
Inventors: 卡尔冈纳阿普尔布莱德; 拉斯冈纳森
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-26
Filing date: 2008-09-26
Publication date: 2012-11-28
Anticipated expiration: 2028-09-26
Also published as: CN101684879A

Abstract

The invention relates to a method and tools for repairing and connecting insulated line pipes. The line pipe comprises weldable plastic casings surrounding inner pipes which are surrounded by an insulating layer.

Description

Be used to connect, the method and the instrument of maintenance and maintaining insulated line pipes

Technical field

The present invention relates to be used to keep in repair and method that is connected the thermal insulation line pipe and instrument, but this line pipe comprises the outside welding plastic sleeve pipe that surrounds the interior pipe that is centered on by isolation layer.This method is disclosed among disclosed German patent: the DK162 588.

Background technique

The thermal insulation line pipe is generally used for transmitting heat-conducting liquid, for example, and the line pipe in local heating or distant heating system and the cooling system.This pipe also comprises the steel pipe of fluid transfer heat transfer medium.But steel pipe be by insulating material such as polyurethane foam surround and by the outside waterproof welding plastic sleeve pipe of normally polyethylene and so-called PEHD encirclement.

Therefore it is underground to consider that this pipe can be embedded in, and can be corroded and stands high stress and pressure through being continued to be penetrated into water and moisture in the pipe.This can cause leakage over the long term, causes continuous maintenance.Pipe is embedded in like pipe arrangement below road or the expressway sometimes, makes to be difficult to the pipe near damaging, because must lift this pipe from ground, therefore this picking and placeing needs high cost.

Therefore, maintenance cost is very high, and it is also high particularly to have a cost of special area heating pipe of alarm circuit, because must the leakage level be remained on high relatively validity.Alarm circuit will be being provided with its mode that is embedded between outside pipe arrangement and the steel pipe.Therefore, pipe connects and to have best quality and mechanical strength is very important.Two kinds of situation of maintenance to new equipment and existing line pipe have proposed requirement.

Under the worst situation, makeing mistakes in perhaps system's installation installed by the system of different quality can cause the economic loss of relevant heating system for a long time.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of method and instrument that connects and keep in repair insulation tube.

In order to reach the foregoing invention purpose, of the present invention is that maintenance may further comprise the steps with the method that is connected electric welding damage pipe:

One sleeve pipe is provided, and sleeve pipe has can cover the otch of offering on waiting to keep in repair the length in territory, area under control and having vertically;

At first use belt (strap) fixed sleeving;

With band (band) fixed sleeving, upwards draw this band and fixing to strain sleeve pipe fully; With

The sleeve pipe otch of in 230 ℃ of welding vertically, offering.

According to the present invention, of the present inventionly be used for electric welding and take over and to comprise with the instrument that keeps in repair them and to be used to clamp the anchor clamps of subsidiary sleeve pipe that said anchor clamps comprise with the maintenance pipe:

One can insert the insulating electrode moving up and down in the otch of sleeve pipe;

Crank on the one anchor clamps top is used to strain band, and this roll of strip is had mercy in jacket exterior, shifts to instrument in order to strain sleeve pipe then, and this crank is through dentation unit running shaft, and this axle is through rotating wound strips along any direction;

One has the buffer cell of circular perimeter, is used for when to anchor clamps tie rod band, changing the angle that band forms, and this buffer cell can move up and down.

Description of drawings

With reference to accompanying drawing, through the following detailed description of illustrative its preferred implementation, it is obvious that feature and advantage of the present invention will become.Wherein:

Fig. 1 a-Figure 11 illustration according to welding process of the present invention;

Fig. 2 has shown according to soldering appliance of the present invention; With

Fig. 3, Fig. 4, Fig. 5 and Fig. 6 have shown according to welding of the present invention.

Embodiment

Hereinafter is elaborated to the present invention with reference to accompanying drawing.

Fig. 1 a-Figure 11 has schematically shown according to whole welding process of the present invention.Fig. 1 a-Figure 11 schematically shows welding process.As shown in the figure, when in exposing, managing, with between the supporter insertion tube.In this case, the downside of supporter can be connected with bolt, and its right side and left side can be connected on the crank that is connected in two pipe ends.

Shown in Fig. 1 b, connect welded mesh, and reload temperature sensor, adapter sleeve then.Fig. 1 c illustration the state of sleeve pipe after connecting, in this case, an end longitudinal cut of sleeve pipe is also fixing as restricting with belt.Fig. 1 d has shown that the belt that instrument of the present invention is arranged on the outside of welded mesh and will be used for fixing sleeve pipe is arranged on the inside of welded mesh.Apply moment of torsion to be fixedly attached to the band on the anchor clamps with spanner along radial direction.Shown in figure, be connected on the welding machine.Fig. 1 e illustration one embodiment of welding machine.Shown in Fig. 1 f, weld connection at about 230 ℃, and begin to reach 110 ℃ from temperature and just should confirm the time.Fig. 1 g illustration the welding machine that separates of the back that is cooled.Fig. 1 h illustration offering of otch, secondary welding process from the outside is presented among Fig. 1 i.Shown in Fig. 1 j, tested the pressure of jointing.Interface has been full of PUR foamed material (being presented among Fig. 1 k).Behind the foamed material closed hole, all processes (being presented among Figure 11) have just been accomplished.

Fig. 2 illustration how to install welding machine of the present invention additional.Fig. 3 illustration part to be welded.Fig. 4 illustration the state of the installing welding machine that is used to weld.As shown in Figure 4, be provided with crank, so that can obtain enough pressure in the electric fusion welding zone that light beam acts on the pipe on the caliber.Removably be connected with spanner 33 with removable crank 32.

In addition, fixed projection is set so that can only move in one direction and fix when pulled through crank pulling and the band that holds sleeve pipe.

Welding is carried out through electric power.The thickness of the pipe of welding can change.Because welding can not be carried out in the place that welding machine is set, insulate and be movable to the inner electrode 26 of sleeve pipe upper cut will go down to prevent welding in otch.

Fig. 6 in more detail illustration welding process.Fig. 6 has shown the workpiece part that is equiped with welding machine.When with band fixed muffle sleeve pipe peripheral, be different according to the different surfaces of the cross section of adapter to be welded.For this reason, band will twine along the periphery of pipe, upwards draws then.Buffer cell 42 is set so that can keep stress, band can not broken owing to putting on this stress that upwards pulls to welding machine.Buffer cell can move up and down through last/mobile down guide element 43, so that the band 23 that is upwards drawn can be adjusted according to the size or the surface state of pipe.

Fig. 5 illustration surround the state of pipe with sleeve pipe.

But welding is accomplished on aforesaid the present invention's zero defect ground.

It should be noted that the above embodiments are examples rather than limit the present invention, those skilled in the art can design many alternate embodiments, but the scope of the present invention that does not break away from accompanying claims and limited.Generally speaking, word " comprises " and its synonym is not got rid of parts or steps beyond cited those in any claim or the specification.

Claims

1. one kind in order to maintenance with is connected the method for electric welding adapter, it is characterized in that, may further comprise the steps:

At first use the tape sleeve pipe;

Use the band fixed sleeving, upwards spur this band and fixing to strain sleeve pipe fully; With

The sleeve pipe otch of in 230 ℃ of welding vertically, offering.

2. one kind in order to maintenance with is connected the instrument that electric welding is taken over, and it is characterized in that, comprises being used to clamp the anchor clamps that subsidiary sleeve pipe is managed with maintenance that said anchor clamps comprise:

Crank on the one instrument top, it is used to strain band, and this roll of strip is shifted to instrument in order to strain sleeve pipe then around jacket exterior, and said crank is through dentation unit running shaft, and this axle is through rotating wound strips along any direction;