KR101401410B1 - Continuity manufacture method of fluid transfer pipe and thereof pipe and thereof pipe connector - Google Patents

Abstract

The present invention relates to a continuous manufacturing method of a fluid transfer pipe and a pipe and pipe connector manufactured thereby, comprising the steps of: impregnating a nonwoven fabric with mortar and winding the same on a mold frame; A second step of forming an inner tube by flattening the outer peripheral surface of the wound nonwoven fabric; A third step of separating a plurality of reinforcing members at regular intervals and winding the reinforcing members in a spiral shape on an outer peripheral surface of the inner pipe; Impregnating the nonwoven fabric with mortar and winding the nonwoven fabric on the reinforcing material; A step 5 for forming an outer appearance by flattening the outer peripheral surface of the nonwoven fabric wound in the step 4; An inner pipe which is formed by winding a nonwoven fabric impregnated in the mortar into a cylindrical shape through a six-step process of cutting the fluid transfer pipe manufactured by the inner pipe and the outer pipe to a predetermined length; A stiffener spirally wound on an outer peripheral surface of the inner tube; And the nonwoven fabric impregnated in the mortar is wound on the upper portion of the reinforcing material to produce an outer pipe for the fluid transfer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a continuous manufacturing method of a fluid transfer pipe and a pipe and pipe connector manufactured thereby,

More particularly, the present invention relates to a method of manufacturing a fluid transfer pipe, and more particularly, to a method of manufacturing a fluid transfer pipe, in which a rotating mold is formed by winding a nonwoven fabric impregnated with mortar to form an inner tube, To thereby increase the strength by forming an outer tube by winding the nonwoven fabric impregnated with the impregnated nonwoven fabric, and a pipe and pipe connector manufactured thereby.

Generally, a concrete pipe, a steel pipe, a cast iron pipe or the like is embedded in the ground to be widely used as a pipe for transferring various kinds of sewage, water, or fluid such as oil, gas, and other heating water.

Since these pipes are formed of a single pipe, a heat insulating material is installed on the outer circumference of the pipe in order to increase the heat insulating performance and to prevent the breakage due to the external impact.

However, it is still difficult to solve the problem that the connection part is damaged or deformed by the increase of the earth pressure or the external impact due to the subsidence of the ground.

However, increasing the thickness of the pipe in order to increase the strength results in problems that are difficult to handle due to an increase in manufacturing cost and an excessive weight of the pipe.

On the other hand, lightweight and high strength pipes have been developed in recent years. For example, glass fiber reinforced plastic pipes, cement concrete, sulfur polymers, resin polymers, etc. are reinforced plastic pipes manufactured by centrifugal molding with reinforcing steel do.

The glass fiber reinforced plastic pipe has been manufactured mainly by a filament winding method.

Filament winding method refers to a method of manufacturing an axially symmetric composite material structure such as a pipe, a pressure vessel, a rocket motor case, etc., by winding a continuous fiber with a resin on the rotating shaft.

However, when the pipe is manufactured by filament winding method, there is a problem that the outer surface is not clean and the manufacturing cost is high. The pipe manufactured by centrifugal molding with cement concrete, sulfur polymer, However, there is a problem that it is difficult to manage each process because many defects occur because it is manufactured through various processes.

Further, it is difficult to connect the connection portion of the pipe to the pipe at the connection, and the strength is weak.

The present invention has been conceived to overcome the problems of the prior art described above, and it is an object of the present invention to provide a nonwoven fabric which is impregnated with a mortar to continuously form a pipe having an inner pipe and an outer pipe, And it is an object of the present invention to provide a continuous manufacturing method of a fluid transfer pipe capable of improving durability and a pipe manufactured thereby.

It is another object of the present invention to provide a pipe connection pipe for a fluid transfer pipe which is screwed to a stiffener of the fluid transfer pipe so that a plurality of pipes can be connected while maintaining a continuous hermetic state.

SUMMARY OF THE INVENTION [0008]

A step 1 in which the nonwoven fabric is impregnated with mortar and then wound on a mold frame; Fabricating the inner tube by flattening the outer peripheral surface of the wound nonwoven fabric; A third step of separating a plurality of reinforcing members at regular intervals and winding the reinforcing members in a spiral shape on an outer peripheral surface of the inner pipe; Impregnating the nonwoven fabric with mortar and winding the nonwoven fabric on the reinforcing material; Fabricating the outer surface of the nonwoven fabric wound in step 4 so as to produce an outer appearance; And a sixth step of cutting the fluid transfer pipe manufactured by the inner pipe and the outer pipe to a predetermined length.

Meanwhile, an object of the present invention is to provide a method of manufacturing a fluid transmission pipe, which is manufactured by the continuous manufacturing method of the above-described fluid transfer pipe, comprises: an inner pipe formed by winding a nonwoven fabric impregnated in a mortar into a cylindrical shape; A stiffener spirally wound on an outer peripheral surface of the inner tube; And a non-woven fabric impregnated in the mortar is wound on the upper portion of the reinforcing material.

It is an object of the present invention,

A cylindrical body having a passage formed therein for connecting the fluid transfer pipe and a coupling member provided on both sides of the body and having a coil having a rectangular cross section so as to be screwed to the reinforcing member, And the connecting pipe of the fluid transfer pipe is characterized in that the connection is made.

As described above, according to the present invention, a double tube of an inner tube and an outer tube is formed. By providing a reinforcing material in a spiral shape between the inner tube and the outer tube, it is possible to increase the strength and the strength while reducing manufacturing cost and durability A continuous production of the fluid transfer pipe becomes possible.

In addition, the pipe connector of the present invention has the effect of connecting a plurality of fluid transfer pipes while maintaining a continuous hermetic state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a step of manufacturing a pipe according to the present invention.
2 is a perspective view illustrating a pipe manufacturing process according to the present invention.
3 is a perspective view of a pipe manufactured by the pipe manufacturing method according to the present invention.
4 is a cross-sectional view of a pipe manufactured by the pipe manufacturing method according to the present invention.
5 is a perspective view of a pipe connector according to the present invention.
6 is a sectional view of a pipe connector according to the present invention;
FIG. 7 is a cross-sectional view illustrating a pipe connection port according to an embodiment of the present invention; FIG.
8A to 8C are enlarged cross-sectional views of a portion of a pipe manufactured by the pipe manufacturing method according to the present invention.
Description of the Related Art
2: mold 3,7: nonwoven fabric
4: Mortar 5,9: Rollers
6: stiffener 10: hardening device
12: cutter 20: fluid transfer pipe
14: Connector 145:
146: Body

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart showing steps of a pipe manufacturing process according to the present invention, and FIG. 2 is a perspective view illustrating a pipe manufacturing process according to the present invention.

As shown in Figs. 1 and 2, a continuous manufacturing method of a fluid transfer pipe according to the present invention includes a first step S1 of immersing a nonwoven fabric 3 in a mortar 4 and then winding the same on a mold 2, (S2) of forming an inner tube (21) by flattening the outer peripheral surface of the wound nonwoven fabric (3), a step (S2) of forming a plurality of reinforcing materials (6) (S4) of winding the nonwoven fabric (3) on the outer side of the reinforcing material (6) after impregnating the nonwoven fabric (3) with the mortar (4) (S5) of forming the outer tube 22 by flattening the outer circumferential surface of the inner tube 3 and forming the outer tube 22; and a sixth step S5 of cutting the fluid transmission pipe 20 comprising the inner tube 21 and the outer tube 22 to a predetermined length (S6).

Step 1 (S1)

Like nonwoven fabric 3 impregnated in the mortar 4 is wound around the outer circumferential surface of the tapered mold 2 so that the diameter becomes smaller toward the rear side.

The mold 2 is rotated at a constant speed by a rotary power unit R such as a motor, whereby the nonwoven fabric 3 can be easily wound.

Since the mold 2 is in a tapered shape, the wound nonwoven fabric 3 is moved rearward, so that a circular tube can be formed.

At this time, in order to prevent the nonwoven fabric 3 from adhering to the mold 2, an adhesive tape (not shown) is attached to the outer surface of the mold 2 in advance.

Mortar (4) is suitable for sulfur concrete. Sulfur concrete has higher tensile strength, compressive strength, flexural strength and fatigue life than portland cement concrete. It has excellent resistance to acid and salt in very dense concentration. It can reach 70 ~ 80% quickly, can be laid all year round, can be laid at subzero temperature, and shows very low water permeability.

After the mortar 4 is immersed in a predetermined reservoir, the band-like nonwoven fabric 3 is immersed in the mortar reservoir and the mortar 4 is impregnated and then wound on the mold 2.

It is needless to say that other hardeners other than mortar may be used.

At this time, the nonwoven fabric 3 is wound in a spiral shape, and its ends are wound to slightly overlap each other.

Step S2 (S2)

The outer surface of the nonwoven fabric 3 wound in a cylindrical shape through the first step S1 is not flat since the overlapped portion exists.

Therefore, the outer surface of the nonwoven fabric 3 is pressed to uniform the thickness of the mortar 4, and the excessive mortar 4 of the overlapped portion is cut out to perform a flattening process so as to have a uniform thickness.

The flattening process is performed by a plurality of rollers 5 provided outside the mold 2.

In addition to the rollers 5 described above, a flat blade may be used.

The mortar 4 of the nonwoven fabric 3 is cured to form the inner tube 21 while passing through the flattening process.

Step S3 (S3)

A plurality of stiffeners 6 are wound on the outer circumferential surface of the inner tube 21 in a spiral shape at regular intervals.

The reinforcing member 6 is in the form of a flat plate, and preferably, the three rows of the reinforcing members 6 are wound at the same time so as to be wound in a triple helix shape.

At this time, the three rows of stiffeners 6 have different starting points. Preferably, the starting points (201, 202, 203) are formed at positions where the circumference is divided into three equal parts by 120 degrees. (See FIG. 3).

Of course, the number of arrangements of the reinforcement 6 is not limited to three, and the number of arrangements of the reinforcement 6 can be increased or decreased as needed.

Step S4 (S4)

The nonwoven fabric 7 impregnated in the mortar 4 is wound on the outer surface of the inner tube 21 wound with the reinforcing material 6 on the outer peripheral surface in the third step S3.

The outer tube 22 is formed by continuously winding the nonwoven fabric 7 impregnated with the mortar 4 on the outer side of the stiffener 6 as in the first step S1.

Step 5 (S5)

The outer peripheral surface of the nonwoven fabric 3 wound in the fourth step S4 is flattened by using the same roller 9 as the roller 5 described in the second step S2 to form the outer tube 22, 21 and the outer pipe 22 can be formed.

The fluid transfer pipe 20 having the inner pipe 21 and the outer pipe 22 is caused to pass through the hot or cold hardening device 10 so that the mortar 4 is cured.

Step 6 (S6)

The fluid transfer pipe 20 made of the inner tube 21 and the outer tube 22 is cut to a predetermined length using a cutter 12 as necessary.

FIG. 3 is a perspective view of a pipe manufactured by the pipe manufacturing method according to the present invention, and FIG. 4 is a sectional view of a pipe manufactured by the pipe manufacturing method according to the present invention.

3 and 4, the pipe 20 of the present invention, which is manufactured through the above-described manufacturing process, has an inner tube (not shown) wound with a cylindrical nonwoven fabric 3 impregnated with the mortar 4 A reinforcing material 6 spirally wound on the outer circumferential surface of the inner tube 21 and an outer tube 22 wound on the reinforcing material 6 on the nonwoven fabric 3 impregnated in the mortar 4, As shown in FIG.

As described above, the reinforcing member 6 is formed by spirally winding three rows of flat plates on the outer peripheral surface of the inner tube 21.

The three rows of stiffeners 6 are formed to have different starting points at intervals of 120 degrees.

Of course, the number of arrangements of the stiffeners 6 and the distance between starting points can be variously modified.

For convenience of explanation, the starting points of the respective columns of the reinforcement 6 will be referred to as first to third starting points 201, 202 and 203. [

Meanwhile, in order to continuously connect the fluid transfer pipes 20, a connector 14 is required.

FIG. 5 is a perspective view of a pipe connector according to the present invention, FIG. 6 is a cross-sectional view of a pipe connector according to the present invention, and FIG. 7 is a cross-sectional view illustrating a pipe connector according to an embodiment of the present invention.

As shown in FIGS. 5 and 6, the connecting port 14 of the fluid transfer pipe of the present invention includes a cylindrical body 146 having a passage 140 formed therein and a cylindrical body 146 disposed on both sides of the body 146, And an engaging member 145 formed by winding a barrel having a rectangular cross section in the form of a coil so as to be screwed to the reinforcing member 6. [

The body 146 is a cylindrical body having a passage 140 having an inner diameter equal to the diameter of the pipe 20, and is made of an elastic material such as rubber or synthetic resin.

As described above, since the stiffener 6 is formed in three rows so that the engaging member 145 can be screwed to the stiffener 6, the engaging member 145 Are also formed in three rows.

Also, since the starting points of the three rows of stiffeners 6 are different from each other at intervals of 120 degrees, it is preferable that the engaging members 145 are also formed with different starting points at intervals of 120 degrees.

Therefore, since the engaging member 145 is formed by winding the barrel in the form of a coil, the barrel can be freely bent so that the two fluid transfer pipes 20a and 20b to be connected can be bent and arranged.

That is, the second fluid transfer pipe 20b connected to the first fluid transfer pipe 20a is connected to the first fluid transfer pipe 20a with respect to the second fluid transfer pipe 20b within the range of about ± 30 to 60 ° And the sealing member (not shown) such as powder is coated on the clearance of the engaging member 145 when refracted so that the watertight state can be maintained.

Hereinafter, the coupling between the fluid transfer pipe and the connector will be described.

At the end of the first fluid transfer pipe 20a, the starting points of the three rows of stiffeners 6 are exposed as described above, and the starting points of the respective columns are spaced apart at intervals of about 120 degrees.

Also, since the coupling members 145 of the pipe connector 14 are spaced apart from each other by about 120 degrees, the starting points of the coupling members are classified as first to third end points 141, 142, 143 for convenience of description (see FIG. 5 ).

7, the first end point 141 of the engaging member 145 is engaged with the first start point 201 of the stiffener 6 of the first fluid transfer pipe 20, So that the coupling member 145 is screwed into the inside of the reinforcing member 6 when it is rotated.

Thereafter, when the one coupling member 145 of the coupling port 14 is coupled to the first fluid transfer pipe 20a at an appropriate depth, the other coupling member 145 is inserted into the stiffener 6 of the second fluid transfer pipe 20b, The first and second fluid transfer pipes 20a and 20b can be connected to each other via the connection port 14 by screwing them in the manner as described above.

At this time, the first and second fluid transfer pipes 20a and 20b may be bent and arranged as needed, and a sealing material (not shown) may be provided on the outer side thereof to maintain the watertight state of the connector 14 Can be coated.

The plurality of fluid transfer pipes 20a, 20b, ... can be continuously connected by such a connection method.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

On the other hand, in the third step S3, a spiral duct forming machine (not shown) is provided to increase the bending strength by forming the reinforcing member 6 into a spiral type.

8A to 8C are enlarged cross-sectional views of another embodiment of a pipe manufactured by the pipe manufacturing method according to the present invention.

The embodiment A1 shown in Fig. 8A has a structure in which the reinforcing member 6a is provided on the outer surface of the inner tube 21 in a spiral shape while being folded and folded so as to have a vertical surface 624a at both lower ends of the horizontal surface 622a And a horizontal plane is formed so as to be in contact with the outer surface 22.

The embodiment A2 shown in Fig. 8B has a structure in which the reinforcing member 62 is provided on the outer surface of the inner tube 21 in a spiral shape while folding and folding the reinforcing member 62 in a " shape "shape so as to have a vertical surface 624b at both ends of the horizontal surface 622b And the horizontal plane 622b is formed so as to be in contact with the inner tube 21. [

The embodiment A3 shown in Fig. 8C has a structure in which the reinforcing member 63 is provided with the horizontal surface 622c at its upper and lower ends and the inner tube 21 is formed into a spiral shape by folding and folding in a "? &Quot; shape so as to have a vertical surface 624c at both ends thereof. And the upper and lower horizontal surfaces 622c are formed so as to be in contact with the inner and outer tubes 21 and 22. [

Claims (17)

A step 1 in which the nonwoven fabric is impregnated with mortar and then wound on a mold frame;
A second step of forming an inner tube by flattening the outer peripheral surface of the wound nonwoven fabric;
A third step of separating a plurality of reinforcing members at regular intervals and winding the reinforcing members in a spiral shape on an outer peripheral surface of the inner pipe;
Impregnating the nonwoven fabric with mortar and winding the nonwoven fabric on the reinforcing material;
A step 5 for forming an outer appearance by flattening the outer peripheral surface of the nonwoven fabric wound in the step 4;
And a sixth step of cutting the fluid transfer pipe manufactured by the inner pipe and the outer pipe to a predetermined length
, ≪ / RTI >
Wherein the spiral duct forming device is installed in the step 3 so that the reinforcing material can be formed into a spiral type. The method according to claim 1,
Wherein the mold is tapered so that the diameter of the mold becomes narrower toward the rear side, and an anti-adhesion tape is attached to the outer surface so that the nonwoven fabric is not adhered to the outer surface. The method according to claim 1,
Wherein the nonwoven fabric is wound in a spiral shape and wound so as to overlap the ends thereof. The method of claim 1, wherein
Wherein the flattening process of the second and fifth steps is performed by a plurality of rollers provided outside the mold. The method of claim 1, wherein
Wherein the flattening process of the second and fifth steps is performed by a plurality of flat blade blades provided outside the mold. The method of claim 1, wherein
Wherein the reinforcing member is in the form of a flat plate, and three rows of reinforcing members are simultaneously wound and wound in a triple spiral shape. The method of claim 6, wherein
Wherein the three rows of stiffeners are formed to have different start points. The method of claim 7, wherein
Wherein the starting point is formed at a position where the circumference is divided into three equal parts at intervals of 120 degrees. The method of claim 1, wherein
Wherein a hot or cold hardening device is provided between steps 5 and 6 so that the mortar can be cured. delete delete delete delete delete The method according to claim 1,
Wherein the reinforcing member is formed on the outer surface of the inner pipe so as to be folded and folded so as to have a vertical plane at both lower ends of the horizontal plane so as to have a vertical plane and the horizontal plane is in contact with the outer pipe. Way.
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