KR20140048723A - Corrugated steel pipe and apparatus for manufacturing the same - Google Patents

Abstract

The present invention relates to a corrugated steel pipe and a manufacturing device thereof. The corrugated steel pipe comprises a pipe body and a locking core part. The pipe body is formed by spirally winding a steel plate having multiple corrugated parts laterally arranged at the center. The locking core part is formed by compressing a watertight member and first and second bent grooves in a state where the watertight member is inserted in the first bent groove and first and second bent parts are inserted in the second and first bent grooves, respectively, wherein the first bent part for restricting the first groove is formed by bending one side of the steel plate in a specific direction, and the second bent part for restricting the second bent groove is formed by bending the other side of the steel plate in the opposite direction to the first bent part while the steel plate is spirally wound. The watertight member is made up of a viscoelastic polymer material.

Description

[0001] CORRUGATED STEEL PIPE AND APPARATUS FOR MANUFACTURING THE SAME [0002]

The present invention relates to a corrugated steel pipe used as a water supply pipe for supplying wastewater, domestic water or industrial water, and an apparatus for manufacturing the corrugated steel pipe.

In general, the corrugated steel pipe is characterized by excellent external strength, structural stability, economical efficiency and workability, and is widely used as a water pipe for domestic and domestic water supply or industrial water supply. The corrugated steel pipe is manufactured so as to have the shape of a tube by forming a wave-shaped bend in the steel plate, folding the formed steel plate with a spiral, and folding the left and right side edges of the steel plate. In the corrugated steel pipe thus manufactured, the portions where the left and right sides of the steel plate are folded together form a lock seam.

In the early stage when the corrugated pipe is constructed in a landfill or the like, leakage is not generated in the rock core part. However, when the corrugated steel pipe is deformed or restored due to live load and floating settlement after the corrugated steel pipe is constructed, fine deformation may occur in the deep part of the rock. Even after the road pavement, there are many movements under the pavement surface due to vibration due to live load and floating settlement, which may cause fine deformation of the rock core.

If minute deformation occurs in the rock core, leakage may occur from the inside of the corrugated steel pipe to the outside due to deformation, or external water such as ground water or leachate may flow into the corrugated steel pipe from the outside.

Particularly, in a landfill or an area with a high groundwater level, the outside of the corrugated steel pipe has a higher pressure than the corrugated steel pipe due to the earth pressure, so that the influx of the external water into the corrugated steel pipe, Can be accelerated. In this case, when the groundwater level is lowered and the moisture content of the soil layer decreases, the density of the soil is lowered, so that the ground subsides, which may cause floating settlement until the groundwater level becomes below a certain level.

In the case of the soft ground where an immovable settlement occurs, the entire corrugated steel pipe is not settled by a constant external pressure but a part of the corrugated steel pipe may be settled or deformed. Accordingly, the corrugated steel pipe may have a gap due to partial incompatibility occurring at the connection portion connected to the other corrugated steel pipe. Secondary problems such as leaking through the gaps in the connection and the inflow of external water may occur.

Also, if leakage occurs through the deep part of the rock, if the pressure inside the corrugated pipe is high, leakage may proceed to the outside over a long period of time. Then, a backfill such as soil or sand surrounding the corrugated steel pipe flows into the gap formed in the underground, causing an immiscible settlement, which may cause cavitation at the bottom of the top layer or the package layer. As a result, ground subsidence can occur, so it is necessary to prevent leakage of water through the rock core and inflow of external water.

Patent Registration No. 10-0819208 (published on April 2, 2008)

SUMMARY OF THE INVENTION The present invention provides a corrugated steel pipe capable of preventing the phenomenon of leakage from the inside of the tube to the outside and the phenomenon that the contaminated water flows into the tube from the outside of the tube, and an apparatus for manufacturing the corrugated steel tube.

To achieve the above object, according to the present invention, there is provided a corrugated steel pipe comprising: a tube formed by winding a steel plate having a plurality of corrugations in a width direction at a center thereof; And a water tight member made of a viscoelastic polymer material is inserted into a first bent groove defined by a first bent portion bent in one direction on either side of the steel sheet, and the steel sheet is wound on the other side of the steel sheet A second bending portion bent in a direction opposite to the first bending portion to define a second bending groove is inserted into the first bending groove and in a state where the first bending portion is inserted into the second bending groove, And a lock core formed by pressing the first and second bent grooves together.

An apparatus for manufacturing corrugated steel pipe according to the present invention comprises: a steel plate supply unit for supplying a steel plate in one direction; A plurality of corrugations in the width direction are formed in a central portion of the steel sheet supplied from the steel sheet supply unit and a first bent portion that is bent upward at one side of the steel sheet to define the first bent grooves is formed, A corrugated part forming unit for forming a second bent part that is bent downward on the side of the side wall and defines the second bent groove; A water supply material supply unit for supplying a water storage material made of a viscoelastic polymer material to the first bent groove in the steel sheet formed by the corrugated part forming unit; And a step of inserting the second bent portion into the first bent groove while inserting the first bent portion into the second bent groove while spirally winding the steel sheet supplied by the water-containing material supply unit with the water-tight material, And a lock core forming unit for pressing the first and second bent grooves together to form a lock core portion.

According to the present invention, even if deformation of the tubular body occurs, since the inside and the outside of the tubular body can be completely blocked by the water absorbent material having viscoelasticity and inserted into the deep deep portion, the phenomenon of leaking to the outside from the inside of the tubular body, It is possible to prevent the contaminated water from flowing into the inside.

1 is a perspective view of a corrugated steel pipe according to an embodiment of the present invention;
Fig. 2 is a cross-sectional view of the rock core shown in Fig. 1; Fig.
Figs. 3 to 5 are sectional views showing modifications of the lock core. Fig.
6 is a configuration diagram of an apparatus for manufacturing the corrugated steel pipe of FIG. 1;
7 is a cross-sectional view of a steel sheet formed by the corrugated part forming unit of FIG. 6;
8 is a perspective view of the water-containing material supply unit of Fig. 6;
FIGS. 9 and 10 are views for explaining a process of molding a lock core portion by the lock core forming unit of FIG. 6;
11 is a view for explaining a process of supplying a water-retaining member by another example of the water-based material supply unit;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and repeated descriptions and known functions and configurations that may obscure the gist of the present invention will not be described in detail. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is a perspective view of a corrugated steel pipe according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of the rock core shown in Fig. 1; Fig.

1 and 2, the corrugated steel pipe 100 includes a tube 110 and a deep core 120. [

The tube 110 is formed by winding a steel sheet with a spiral. Here, since the steel plate has a plurality of corrugated portions 111 in the width direction at the central portion thereof, the corpuscular body 110 has the corrugated portions 111 wound in a spiral. The steel plate has a first bent portion 121 bent in one direction at one side to define the first bent groove 122 and bent at the other side in a direction opposite to the first bent portion 121 And a second bending portion 123 defining a second bending groove 124.

The water core member 125 made of a viscoelastic polymer material is inserted into the first bending groove 122 and the second bending portion 123 is inserted into the first bending groove 122 The first and second bending grooves 122 and 124 are pressed and formed together with the water receiving member 125 in a state where the first bending portion 121 is inserted into the second bending groove 124.

For example, in a state where the water retaining member 125 is inserted into the bottom surface of the first bending groove 122, the second bending portion 123 is inserted into the first bending groove 122, When the first and second bending grooves 122 and 124 are pressed together after the first bending section 121 is inserted into the first bending groove 122, 2 bending portions 123. [0052] As shown in Fig.

Here, since the water retaining member 125 has elasticity, it generates an elastic force to be restored from deformation due to compression. Accordingly, the water retaining member 125 maintains a state of being in close contact with the first bending groove 122 and the second bending portion 123 by the elastic force, so that water tightness in the lock core 120 can be enhanced. Since the water retaining member 125 has viscosity, the water retaining member 125 can be freely deformed according to the deformation of the tubular body 110 even if the tubular body 110 is deformed. Since the inside and the outside of the tubular body 110 can be completely blocked by the water retaining member 125, the phenomenon that the tubular body 110 leaks from the inside of the tubular body 110 and the phenomenon that the contaminated water flows into the inside from the outside of the tubular body 110 Can be prevented.

The water holding member 125 is made of a viscoelastic polymer material in a solid state, for example, rubber, silicone, epoxy or the like in a solid state, and inserted into the space of the bottom surface of the first bending groove 122 and the spaces of both sides of the second bending portion 123 Lt; / RTI > As another example, the water-retaining member 125 may be formed of a liquid visco-elastic polymer material such as silicon, epoxy, urethane or the like in the form of liquid in a space between the bottom surface of the first bending groove 122 and both spaces of the second bending portion 123 May be inserted and solidified.

3, the water retaining member 225 in the lock core 220 has a first bent portion 121 and a second bent portion 123 (see Fig. 3), as compared with the water retaining member 125 shown in Fig. 2 As shown in FIG. In this case, the water retaining member 225 has a larger volume than the water retaining member 125 shown in FIG. 2 and is inserted biased toward the first bent portion 121 from the bottom side space of the first folding groove 122, They can be disposed in the above-described manner when they are pressed together with the 1,2 folding grooves 122 and 124. [

4, the water-retaining member 325 in the lock core 320 has a first folded portion 121 and a second folded portion 123 (see FIG. 4) from a space on the bottom side of the first folded groove 122, To the space of the bottom surface of the second bending groove 124. In addition, In this case, the water retaining member 325 is disposed on the inner side surface of the first bending portion 121, and the second bending portion 123 is disposed on the inner side of the first bending portion 121, facing the first bending portion 121, When the water retaining member 325 is pressed together with the first and second bending grooves 122 and 124 in the state where the first and second bending grooves 122 and 124 are inserted into the first bending groove 122,

As another example, as shown in FIG. 5, the water-retaining member 425 in the lock-in portion 420 may be disposed in a mixed manner with the solid water-retaining member 425a and the liquid water retaining member 425b. The solid water retaining member 425a is inserted and arranged in the space of the bottom surface of the first bending groove 122 and the space of the second bending portion 123. [ The solid water retaining member 425a is formed with grooves in a portion facing the first bending groove 122, and the liquid water retaining member 425b may be filled in the grooves. In this case, the liquid water repellent material 425b is first inserted into the space on the bottom surface of the first bent groove 12, the solid water repellent material 425a is disposed on the liquid water repellent material 425b, When the stationary material 425a and the liquid water material 425b are squeezed together with the first and second bending grooves 122 and 124, they can be arranged in the above-described manner. The liquid water retaining member 425b has adhesiveness and can be more stiffly attached to the inner surface of the solid water retaining member 425a and the first bent groove 122. [

On the other hand, though not shown, the solid water material may have protrusions formed in a portion facing the first bending groove 122, and a space between the protrusions may be filled with liquid water tight material. In addition, it is needless to say that the water-containing material can be variously configured in a range that can increase the watertightness of the rock deep portion.

6 is a configuration diagram of a manufacturing apparatus for manufacturing the above corrugated steel pipe. 7 is a cross-sectional view of a steel sheet formed by the corrugated part forming unit of Fig. 8 is a perspective view of the water-containing material supply unit of Fig. 9 and 10 are views for explaining the process of forming the lock core portion by the lock core forming unit of FIG.

6, the corrugated steel pipe production apparatus 1000 includes a steel plate supply unit 1100, a corrugated part forming unit 1200, a water material supply unit 1300, and a rock core forming unit 1400.

The steel plate supply unit 1100 supplies the steel plate 101 in one direction. The steel plate supply unit 1100 may have an uncoiler that unwinds the wound steel plate 101. [ The uncoiler can supply the corrugated sheet forming unit 1200 by loosening the steel plate 101 with both sides of the steel plate 101 facing up and down.

The corrugated part forming unit 1200 forms a plurality of corrugations 111 in the width direction at the central portion of the steel plate 101 supplied from the steel plate supply unit 1100. The corrugated part forming unit 1200 forms a first bent part 121 which is bent upward at one side of the steel plate 101 to define the first bent groove 122, A second bent portion 123 is formed which is bent downward at the side edge to define the second bent groove 124. Then, as shown in FIG. 7, the steel sheet 101 is formed to have corrugations 111, first and second bent portions 121 and 123, and first and second bent grooves 122 and 124. do.

For example, the corrugated part forming unit 1200 may include corrugated part forming rollers and bend forming rollers. The corrugated part forming rollers may be arranged to correspond to the central part of the steel plate 101 and to form the corrugated part 111 at the center of the steel plate 101 by passing the steel plate 101 through the vertically spaced part. The corrugated part forming rollers may be configured to gradually form the corrugated portions 111 on the steel plate 101 by being stepwise increased along the advancing direction of the steel plate 101. The bending part shaping rollers are disposed so as to correspond to both sides of the steel sheet 101 and pass through the steel sheet 101 while being spaced apart from each other so that first and second bending parts 121 and 123 are formed on both sides of the steel sheet As shown in FIG.

The water-based material supply unit 1300 supplies the water-retaining material made of the viscoelastic polymer material to the first bent groove 122 in the steel plate 101 formed by the corrugated part forming unit 1200. 2, the water-based material supply unit 1300 may be a solid-state water supply unit for supplying the water-based material 125 made of a solid viscoelastic polymer material to the first bending groove 122, And a material supply unit 1310. The water retaining member 125 may have a predetermined sectional area and may have a long elongated shape. As shown in FIG. 8, the solid-solid material supply unit 1310 may include a water material supply reel 1311 and a drawing roller 1312.

The water-based material supply reel 1311 winds the water-based material 125 and supplies the water-based material 1250 wound in the same direction as the direction in which the steel sheet 101 is fed. Here, the feed rate of the water retaining member 125 by the water feed reed 1311 may be set equal to the feed rate of the steel plate 101 by the uncoiler. The water supply reel 1311 can be supported by the reel supporting bracket 1313. [ The reel support bracket 1313 may be mounted on and supported by the roller support frame 1210 of the corrugation part forming unit 1200.

The drawing roller 1312 draws the water receiving material 125 supplied from the water material feeding reel 1311 into the first bending groove 122. The drawing roller 1312 can be supported by the reel supporting bracket 1313 so as to correspond to the entrance of the first bending groove 122. When the first bent groove 122 is moved to the lock forming unit 1400 by the movement of the steel plate 101, the water receiving material 125 is drawn along the first bent groove 122 by the drawing roller 1312 . The water receiving material 125 may be variously arranged in the lock core portions 120, 220 and 320 as shown in FIGS. 2 to 4 according to the form of being drawn into the first bending groove 122, The first bending groove 1312 may be configured to draw the water retaining member 125 into the first bending groove 122 in a desired shape. The solid-solid storage material supplying unit 1310 may include a plurality of guide rollers 1314 for guiding the water-storing material 125 supplied from the water material supply reel 1311 to the drawing roller 1312. [

The rock core forming unit 1400 spirally winds the steel plate 101 supplied with the water-retaining member 125 by the water-based material supply unit 1300. 9, the lock core forming unit 1400 inserts the second bending portion 123 into the first bending groove 122 while winding the steel plate 101, as well as the first bending portion 121, Is inserted into the second bending groove (124). 10, the lock core forming unit 1400 presses the first and second bending grooves 122 and 124 together with the water retaining member 130 to form the lock core 120. As shown in FIG.

The lock deep forming unit 1400 may include bending rollers 1410 and pressing rollers 1420. The bending rollers 1410 wind the steel plate 101 in a spiral so as to insert the second bending portion 123 into the first bending groove 122 in which the water retaining member 125 is inserted, 124 to guide the first bent portion 121 to be inserted. In this state, the pressing rollers 1420 insert the portions of the steel sheet 101 in which the first and second bending portions 121 and 123 are overlapped to form the first and second bending grooves 122 124). The corrugated steel pipe manufactured through the deep-core forming unit 1400 can be cut and discharged when the set length is reached.

11, the water-based material supply unit 1300 may further include a liquid-phase water-supply material supply unit 1320 disposed in front of the solid-phase water-supply material supply unit 1310 with respect to the moving direction of the steel plate 101 have. 5, the liquid water holding material supply unit 1320 supplies a liquid water holding material 425b made of a liquid visco-elastic polymer material to the first bending groove 122. In this case,

In this case, after the liquid water retaining member 425b is firstly supplied to the bottom surface of the first bent groove 122, the solid water retaining member 425a may be supplied onto the liquid water retaining member 425b. Thereafter, the liquid water retaining member 425b and the solid water retaining member 425a may be placed in a compressed state in the lock core portion 420 by the lock core forming unit 1400. The liquid water feedstock supply unit 1320 includes a storage vessel 1321 containing the liquid water retaining member 425b and a nozzle 1322 for scanning the liquid retaining member 425b from the storage vessel 1321 into the first bent groove 122. [ . ≪ / RTI > It is, of course, possible that the water-based material supply unit 1300 includes only the solid-liquid material supply unit 1320 and the liquid-phase solid material supply unit 1320.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100 .. Corrugated pipe 110 .. pipe body
120, 220, 320, 420,
1100 .. steel plate supply unit 1200 .. corrugated part forming unit
1300 .. Water material supply unit 1310 .. Solid water water material supply unit
1320 .. < / RTI >

Claims (5)

A tubular body formed by winding a steel plate having a plurality of corrugations in a width direction in a central portion thereof; And
A watertight member made of a viscoelastic polymer material is inserted into a first bent groove defined by a first bent portion bent in one direction on one side of the steel sheet, and the steel sheet is wound in a spiral to the other side of the steel sheet. With the watertight member in a state in which the second bent portion which is bent in the opposite direction to the first bent portion and defines the second bent groove is inserted into the first bent groove and the first bent portion is inserted into the second bent groove, A lock core formed by pressing the first and second bent grooves;
Corrugated steel pipe comprising a. The method of claim 1,
The watertight material is,
It is made of a solid viscoelastic polymer material inserted into at least between the first bend and the second bent portion, or a liquid viscoelastic polymer material is inserted between at least the first bent portion and the second bent portion and solidified Corrugated steel pipe, characterized in that the. A steel plate supply unit for supplying a steel plate in one direction;
A plurality of corrugations in the width direction are formed in a central portion of the steel sheet supplied from the steel sheet supply unit and a first bent portion that is bent upward at one side of the steel sheet to define the first bent grooves is formed, A corrugated part forming unit for forming a second bent part that is bent downward on the side of the side wall and defines the second bent groove;
A watertight material supply unit for supplying a watertight material made of a viscoelastic polymer material to the first bending groove in the steel sheet formed by the corrugation part molding unit; And
The steel sheet supplied with the watertight material by the watertight material supply unit is wound with a spiral while inserting the second bent portion into the first bent groove and inserting the first bent portion into the second bent groove together with the watertight material. A lock core forming unit configured to press the first and second bending grooves to form a lock core;
Wherein the corrugated steel pipe manufacturing apparatus comprises: The method of claim 3,
The watertight material supply unit,
At least one of a solid water-tight material supply unit for supplying a solid water-tight material made of a solid viscoelastic polymer material to the first bent groove, and a liquid water-tight material supply unit for supplying a liquid water-tight material made of a liquid viscoelastic polymer material to the first bent groove. Corrugated steel pipe manufacturing apparatus comprising any one. 5. The method of claim 4,
Wherein the solid-
A water supply material supply reel for winding the solid water material and supplying the wound solid material in the same direction as the direction in which the steel sheet is fed,
And a draw-in roller for drawing the solid-liquid material fed from the water-containing material supply reel into the first bent groove.

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