KR101198682B1 - Scene making type Flexible Pre-insulation pipe Elbow and Manufacturing Method thereof - Google Patents

Abstract

The present invention relates to a field-produced double insulation tube elbow having a basic characteristics and a construction method thereof. More specifically, in the elbow construction method for field fabrication, the inner tube and the outer portion is provided, the insulation is filled between the inner tube and the exterior, the end is a double tube protruding the inner tube by a predetermined length, the center portion is molded in a wave shape Inserting into the casing tube of a straight pipe shape provided with a flexible waveform portion, each end of each of the waveform portion is provided with a straight portion; Connecting an inner tube end of another double tube to an inner tube end of the double tube to form a predetermined angle with each other; Preheating the corrugation unit and moving the casing tube to position the corrugation unit at the inner tube connecting portion; And heating the straight portion to fix the double tube to the casing tube. The straight portion is provided with a plurality of foam holes, injecting a thermal insulation into the foam hole, and relates to a field production double insulation tube elbow construction method having a flexibility, characterized in that it comprises a step.

Description

Construction method of flexible double insulated pipe elbow and double heat pipe elbow constructed by the method {Scene making type Flexible Pre? Insulation pipe Elbow and Manufacturing Method}

The present invention relates to a field-operated double insulation tube elbow construction method having flexibility and a double insulation tube elbow constructed by the method. More specifically, by using a casing tube having a corrugated portion having flexibility for a double tube used for piping, such as district heating, a field-produced double insulation tube elbow and a double insulation tube can be flexibly adapted to the conditions of the site. It is about the construction method of elbow.

Existing double heat insulation elbow (elbow) was produced by cutting and fusion of polyethylene resin (PE) in the field. In other words, the elbows were prepared in advance in the field, and then installed in the field to attach and install. Therefore, there is a problem that the production time is long and the production cost is high. In addition, the angle of the elbow is standardized 90 degrees, 45 degrees, 22.5 degrees, 11,25 degrees in the factory, produced and manufactured, there was a problem that the flexible installation and application according to the topographic conditions or site conditions of the site was not easy. .

In addition, the existing double insulation tube elbow installation method is to weld the inner pipe in the field and then installed in the vicinity of the weld using the outer casing pipe to the field insulation, and finished using waterproof tape and the like.

1a shows a side view of a double pipe 100 used as a pipe for district heating. 1B illustrates the A-A cross-sectional view of FIG. 1A. As shown in Figure 1a and Figure 1b, the double tube 100 is composed of an inner tube 110 and the inner tube 110 of the hollow tube form and the outer space 120 spaced at a predetermined interval, and the inner tube 110 and Insulation material 130 is provided between the exterior (120). Therefore, the fluid flowing in the inner tube 120 is kept warm.

Figure 2 shows a cross-sectional view of a double thermal insulation straight pipe (1) connected linearly in the field by a conventional construction method. As shown in FIG. 2, the inner tube 110 of the double tube 100 is connected by welding or the like, and an outer casing tube 2 for thermal insulation is installed around the welded portion in the field. Therefore, the double insulation effect becomes the same. However, as mentioned above, the appearance 110 of the double pipe 100 takes a method of fusion and processing PE at the factory, so that the time required for manufacturing, the production cost is high and 90 degrees, 45 degrees, As it is standardized at 22.5 degrees and 11,25 degrees, there is a problem that flexible installation is not easy due to local conditions or site conditions.

Therefore, the present invention has been made to solve the above problems, according to an embodiment of the present invention, by using a casing tube having a corrugated portion having flexibility, a double insulation tube that meets the local conditions of the site It will provide the construction method of elbow. In addition, it is possible to provide a construction method of the double insulation tube elbow that can be manufactured and constructed by on-site production, which can shorten the delivery time and construction period. And, it is possible to reduce the construction cost, and to provide a double insulation tube elbow and its construction method that can be flexibly applied according to the conditions of the site.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

An object of the present invention, in the elbow construction method, is provided with an inner tube and an outer, filled with a heat insulating agent between the inner tube and the outer, the end is molded into a double tube with a central portion protruding the inner tube protruded by a predetermined length is flexible It is provided with a corrugated portion having a, each end of the corrugated portion is inserted into the casing tube of the straight tube shape provided with a straight portion; Connecting an inner tube end of another double tube to an inner tube end of the double tube to form a predetermined angle with each other; Preheating the corrugation portion and moving the casing tube to position the corrugation portion at the inner tube connection portion; And fixing the double tube to the casing tube by heating the straight portion. It can be achieved by the field production double insulation tube elbow construction method having flexibility.

The straight portion may be provided with a plurality of foam holes, and after the fixing step, injecting a heat insulating agent into the foam holes, and may further comprise the step of finishing.

After injecting the warming agent, the warming agent may be characterized in that the finishing treatment using a plug.

The casing tube may be manufactured by injection molding, and may be made of a crosslinked polyethylene resin.

In the forming step, it may be characterized in that it further comprises the step of installing a spacer on the inner tube connecting portion.

In the forming step, the inner tube ends may be welded to each other, or between the inner tube ends may be connected using an inner tube elbow tube.

As another category, an object of the present invention is to provide a heat shrinkage property in a double insulation tube elbow constructed by a construction method, having a corrugated portion that is molded into a wave shape and a flexible portion provided at each end of the wave portion. A casing tube having; A double tube inserted into each of the straight portions, the inner tube and the outer tube are filled with a heat insulating agent between the inner tube and the outer tube, and the inner tube provided at the end thereof protrudes; A connecting portion connected to each end of the inner tube inserted into each of the straight lines to form a predetermined angle; including, preheating the waveform part at the time of manufacturing the site to form the wave part at the desired angle, and heating the straight part to connect the casing pipe and the double pipe. It can be achieved as a flexible in situ double heat insulation tube elbow characterized in that.

A plurality of foaming holes are provided in the straight portion, and a heat insulating agent is inserted into the foaming hole.

The heat insulating agent may be characterized in that it is made of a polyurethane material.

The corrugated portion may be characterized in that it is composed of a crosslinked polyethylene material.

It may be characterized in that it further comprises a spacer coupled to the connection portion.

The spacer may be a clip-type spacer provided with a material having an elastic force.

The casing tube may have a length of 1 to 2 m, a diameter of 9 cm to 1.4 m, and a thickness of 2.5 to 26.6 mm.

Therefore, according to one embodiment of the present invention as described above, by using a casing tube having a corrugated portion having flexibility, there is an advantage that can meet the local conditions of the site. In addition, there is an effect that it is possible to manufacture and construct by the on-site production, it is possible to shorten the delivery date and construction period. In addition, it is possible to reduce the construction cost, and have the advantage that it can provide a double insulation tube elbow and its construction method that can be flexibly applied according to the conditions of the site.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be appreciated by those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention, All fall within the scope of the appended claims.

Figure 1a is a side view of a double tube according to an embodiment of the present invention,
1A is a cross-sectional view taken along line AA of FIG. 1A;
Figure 2 is a cross-sectional view of a double thermal insulation straight pipe connected in the field by the conventional construction method,
Figure 3 is a cross-sectional view of the field production double insulation tube elbow having flexibility according to an embodiment of the present invention,
4 is a side view of the casing tube having a corrugated portion having flexibility according to an embodiment of the present invention;
5 is a flow chart of the construction method of the field production double insulation tube elbow having flexibility according to an embodiment of the present invention,
6 is a cross-sectional view of a state in which a double tube is inserted into a casing tube having a corrugated portion having flexibility, according to an embodiment of the present invention;
7A is a perspective view of a spacer according to an embodiment of the present invention;
7B is a perspective view of a clip-type spacer according to an embodiment of the present invention;
8 is a cross-sectional view of a state in which a double pipe is connected by an elbow for an inner pipe according to an embodiment of the present invention;
Figure 9 illustrates a cross-sectional view of the field production double insulation tube elbow having flexibility in accordance with one embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing in detail the operating principle of the preferred embodiment of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is 'connected' to another part, this includes not only 'directly connected' but also 'indirectly connected' with another element in between. do. In addition, "including" a certain component does not exclude other components unless specifically stated otherwise, it means that may further include other components.

< Flexibility  Double Elbow  Configuration>

Hereinafter will be described the configuration of the double heat insulation tube elbow 10 having flexibility according to an embodiment of the present invention. First, Figure 3 shows a cross-sectional view of the elbow 10 having a double heat insulation tube having flexibility according to an embodiment of the present invention.

As shown in FIG. 3, the double insulation tube elbow 10 having flexibility according to an embodiment of the present invention includes a casing tube 200 and an inner tube 110 formed of a straight portion 220 and a corrugated portion 210. ) Is composed of a double pipe (100), the welder 140, and the spacer 140 composed of an appearance (120).

Figure 4 shows a side view of the casing tube 200 according to an embodiment of the present invention. As shown in FIG. 4, the casing tube 200 is made of a crosslinked PE (polyethylene resin) material, and has a corrugated portion 210 molded in a wave shape at the center thereof.

And, both ends of the corrugated portion 210 is provided with a straight portion 220 of PE material. In addition, the straight portion 220 is provided with a plurality of foam holes 221. The corrugated portion 210 may have a ductile property by the heat applied thereto. In addition, the casing tube 200 has a property of shrinkage by heat. Foaming agent is injected into the plurality of foam holes 221 provided in the straight portion 220 at the time of construction. The foaming agent is composed of a material such as polyurethane that keeps warm function.

Casing tube 200 according to an embodiment of the present invention is produced in the form of a straight tube at the time of manufacture, it is possible to form a desired angle by preheating at the time of site installation. Preferably the total length of the casing tube is composed of about 1 ~ 2m, the diameter of 9cm ~ 1.4m, the thickness may be composed of 2.5 ~ 26.6mm. In addition, the casing tube 200 is manufactured by the injection molding method. The casing tube 200 is always produced in the form of a straight tube when manufacturing is reduced production time and production cost.

In another embodiment, the inner pipe 110 and the connection portion connected to the inner pipe 110 may be connected by using an inner pipe elbow tube 240 (shown in FIGS. 8 and 9) instead of welding. In addition, the connection part and the inner tube 110 may further include a spacer 230. Spacer 230 is provided between the inner tube 110 and the casing tube 200 during installation, as shown in Figure 3 to maintain the shape of the corrugated portion 210, to support and protect the connection and the inner tube 110 do.

< Flexibility  Double Elbow  Construction Method>

Hereinafter will be described the construction method of the double insulation tube elbow 10 having flexibility. First, Figure 5 shows a flow chart of the construction method of the double heat insulation tube elbow 10 having the flexibility of the present invention. In the field, the inner tube 110 and the outer tube 120 consisting of the 120 is inserted into the casing tube 200 according to an embodiment of the present invention (S10).

As described above, the double pipe 100 includes a hollow tube type inner tube 110 and an inner tube 100 spaced apart from the inner tube 100 by a predetermined interval, and the heat insulating material between the inner tube 110 and the outer tube 120. 130 is provided. And, in order to connect the double tube 100, the end 120 and the heat insulating material 130 is removed, the inner tube 100 is protruding.

Figure 6 shows a cross-sectional view of the casing tube 200 having a corrugated portion 210 is inserted into the double tube 100 according to an embodiment of the present invention. As shown in Figure 6, the inner tube 120 protrudes at the end is inserted into the casing tube 200 having a corrugated portion 210 in the center. As described above, the casing tube 200 is a straight tube shape at the time of manufacture, the center portion is formed in the corrugated portion 210 is formed into a wave shape, each of the ends of the corrugated portion 210 is a straight line formed with a foam hole 221 The unit 220 is configured.

Then, connect another double pipe at a desired angle (S20). Connection work according to an embodiment of the present invention is not performed in the factory, but in the field, to form the desired angle according to the site conditions to connect the inner tube (120). Each of the inner tube 110 protruding from the end of the double tube 100 may be formed at a desired angle and connected by welding or the like. Construction method according to an embodiment of the present invention is characterized in that the direct connection at the site, to form an angle to meet the topographical conditions to connect the inner tube. The inner tube 110 may be welded to each other to connect the double tube 100, or may be connected using the inner tube elbow 240.

In addition, in the connecting step, the spacer 230 may be installed on the connection portion between the inner tube 110 and the inner tube 110 and the protruding inner tube 110. 7A illustrates a perspective view of a spacer 230 according to an embodiment of the present invention. And, Figure 7b shows a clip-shaped spacer 240 according to an embodiment of the present invention. The spacer 230 illustrated in FIG. 7A inserts the spacer 230 into the protruding inner tube 110 and performs a welding operation before connecting the inner tube.

The clip-shaped spacer 231 shown in FIG. 7B is provided with a material having elasticity, and may be mounted even after connecting the inner tube 110. 7A and 7B illustrate only one embodiment of the spacer 230, and it is obvious that the present invention is within the scope of the present invention, as long as those skilled in the art can obviously modify or modify the spacer 230. .

8 illustrates a cross-sectional view of a double pipe connected using an inner pipe elbow 240. As illustrated in FIG. 8, both ends of the inner tube elbow 240 forming a predetermined angle are connected to each end of the inner tube 110 by welding in the field. And, as shown in Figure 8, it can be seen that the spacer 230 is installed on the inner elbow 240.

Then, the preheating of the corrugation portion 210 of the casing pipe 200 to maintain the ductility of the corrugation portion 210, while the corrugation portion 210 is located in the connection portion connected to the inner tube 210 at a predetermined angle. The casing tube 200 is moved (S30). The casing tube 200 is formed regardless of the angle, to form a double insulation tube elbow connected to meet the site topographic conditions.

9 illustrates a cross-sectional view of the double heat insulation tube elbow 10 located at a connection portion of the inner tube 110 at which the corrugation portion 210 of the casing 200 forms a predetermined angle. When the casing pipe 200 is moved, and the corrugation part 210 is bent at a desired angle and positioned at the connection part, the straight pipe part 220 surrounding the exterior 120 of the double pipe 100 is heated (S40). ). When the straight portion 220 made of PE material is heated, the outer portion 120 and the straight portion 220 are firmly fixed by thermal contraction.

Then, the thermal insulation agent is injected into the foam hole 221 provided in the straight portion 120 (S50). As described above, the heat insulating agent is provided with a polyurethane material having a heat insulating function. Finally, when the warming agent is aged, the finish is processed using a plug (S60). Therefore, in the field, the double pipe 100 is connected to form a desired angle to meet the terrain conditions, and using the casing pipe 200 having a corrugated portion 210 to construct a double heat insulation pipe elbow having a double heat insulation effect It becomes possible.

1: Conventional double heat insulation tube
2: Conventional outer casing pipe
10: flexible double insulation tube elbow
100: double tube
110: Inner tube
120: Appearance
130: insulation
140: welding part
200: casing pipe
210: waveform part
220: straight part
221: foam hole
230: Spacer
231: Clip spacer
240: Elbow for inner tube

Claims (13)

In the el storage construction method,
It is provided with an inner tube and an outer tube, and an insulation is filled between the inner tube and the outer tube, and an end is provided with a corrugated portion having a flexible shape by forming a double tube in which the inner tube protrudes by a predetermined length, and having a central portion formed into a corrugated wave. Inserting into the straight tube-shaped casing tube provided with a straight portion;
Connecting an inner tube end of another double tube to an inner tube end of the double tube to form a predetermined angle with each other;
Preheating the corrugation unit and moving the casing tube to position the corrugation unit at the inner tube connecting portion; And
And heating the straight portion to fix the double pipe to the casing pipe. The method of claim 1,
The straight portion is provided with a plurality of foam holes,
After the fixing step,
Injecting a thermal insulation into the foam hole, and the elevating method of the field production double insulation pipe with flexibility, characterized in that it further comprises the step of finishing. The method of claim 2,
After injecting the warming agent, when the warming agent is aged, the field production double insulation tube elbow construction method having a flexibility, characterized in that the finishing treatment using a plug. The method of claim 1,
The casing tube is manufactured by injection molding, and has a flexible field production double insulation tube elbow construction method, characterized in that composed of crosslinked polyethylene resin. The method of claim 1,
Before the step of connecting,
The field production double insulation tube elbow construction method having a flexibility, characterized in that it further comprises the step of installing a spacer in the inner tube connecting portion. The method of claim 1,
Wherein the connecting step comprises:
The inner pipe end welded to each other, or between the end of each of the inner pipe using the elbow pipe for the field production, having a flexible field production double insulation pipe elbow construction method. In the double insulation tube elbow constructed by the construction method of claim 1,
A casing tube that has a heat shrinkage property and is formed in a wave shape and has a flexible wave portion and a straight portion provided at each end of the wave portion;
A double tube inserted into each of the straight portions, the inner tube and the outer tube being filled with a heat insulating agent between the inner tube and the outer tube, and the inner tube provided at an end thereof protruding from the inner tube;
Including the connecting portion connected to each end of the inner tube inserted into each of the straight line to form a predetermined angle,
Flexible field-produced double insulation tube elbow, characterized in that the pre-heating of the corrugated portion during the field production to form the corrugated portion at a desired angle during the field production, and to heat the straight portion to combine the casing tube and the double tube. The method of claim 7, wherein
A flexible field-produced double insulation tube elbow, characterized in that a plurality of foam holes are provided in the straight portion, and a heat insulating agent is inserted into the foam holes. The method of claim 8,
The thermal insulation agent elbow having a flexible field-action double insulation tube, characterized in that consisting of a polyurethane material. The method of claim 7, wherein
The corrugated part is a flexible field production double insulation tube elbow, characterized in that composed of a crosslinked polyethylene material. The method of claim 7, wherein
Flexible field production double insulation tube elbow, characterized in that it further comprises a spacer coupled to the connection portion. The method of claim 11,
The spacer is a flexible field production double insulation tube elbow, characterized in that the clip-type spacer is provided with a material having an elastic force. The method of claim 7, wherein
The casing tube has a length of 1 ~ 2m, a diameter of 9cm ~ 1.4m, the thickness of the field production double insulation tube elbow, characterized in that 2.5 ~ 26.6mm.

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