KR101979339B1 - Apparatus and method for manufacturing corrugated steel pipe with double layer - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing a corrugated duel steel pipe, which prevents a change in an inner plate to prevent defect when manufacturing a pipe with the inner and outer plates, and a method thereof. According to the present invention, an outer plate preforming unit receives an outer plate from an outer plate feeding unit to bend the central portion of the outer plate in a corrugated shape in a lateral direction so as to preform an outer plate corrugated part. An inner plate preforming unit receives an inner plate from an inner plate feeding unit to bend the central portion of the inner plate in a shape of at least partially surrounding the outer plate corrugated part in a lateral direction so as to preform an inner plate corrugated part. A guide unit receives, presses, and stacks the preformed outer and inner plates while guiding the outer and inner plate corrugated parts to be matched with each other. A pipe milling unit overlaps, presses, and couples an edge portion of the outer and inner plates in a winding direction while winding the stacked outer and inner plates in a helical direction to make a corrugated dual steel pipe. A cutting unit cuts the made corrugated dual steel pipe by a set length. A transfer unit transfers the corrugated dual steel pipe cut by the cutting unit.

Description

Technical Field [0001] The present invention relates to a double corrugated steel pipe manufacturing apparatus and method,

The present invention relates to a technique for manufacturing a double corrugated steel pipe having a structure in which an inner tube body is laminated on an outer tube body having corrugated projections and depressions.

The double corrugated steel pipe has a structure in which an inner pipe body is laminated to an outer pipe body having corrugated concave and convex portions to increase its strength and is used for a household sewer pipe or a road drain pipe. Such a double corrugated steel pipe is advantageous in that it is easier to use than a concrete product and has a low manufacturing cost, and is applied to various places in a construction site.

The double corrugated steel pipe can be manufactured in such a manner that corrugated concave and convex portions are rolled up into a spiral shape by laminating a flat inner plate on a molded outer plate. At this time, the laminated outer and inner plates are superimposed on each other along the winding direction, and are press-coupled to form the lock core portion. In the manufacturing process of the double corrugated steel pipe, if the inner plate is pulled to one side, or if the corrugated part is pulled out or deflected, the double corrugated steel pipe will be defective and a solution for preventing the above problem is required.

Registered Patent Publication No. 10-0713236 (2007. 05. 02. Announcement)

An object of the present invention is to provide an apparatus and a method for manufacturing a double-corrugated steel pipe capable of preventing variations of an inner plate during provision of inner and outer plates to prevent defects.

In order to accomplish the above object, according to the present invention, there is provided a double-corrugated steel pipe manufacturing apparatus comprising a side plate supply unit, an inner plate supply unit, an outer plate preforming unit, an inner plate preforming unit, a guide unit, And a transfer unit. The outer plate supplying unit supplies the outer plate of the steel material. The inner plate supplying unit supplies the inner plate of steel material to the upper side of the outer plate supplied from the outside plate supplying unit. The outer sheath preforming unit receives the outer sheath from the outer sheath supply unit, bends the central portion of the outer sheath in a corrugated shape along the width direction, and preforms the outer sheath corrugated portion. The inner plate preforming unit receives the inner plate from the inner plate supply unit and bends the central portion of the inner plate at least partially around the outer plate uneven portion to thereby preform the inner plate uneven portion. The guiding unit is pressed and laminated by pressing and stacking the outer and inner plates through the preformed outer plate preforming unit and the inner plate preforming unit while being guided so as to match the outer plate uneven portion and the inner plate uneven portion. The tube making unit is made of a double corrugated steel pipe by superimposing the edge portions of the outer and inner plates along the winding direction while compressing the outer and inner plates stacked in the helical direction via the guide unit. The cutting unit cuts the double corrugated steel pipe that has been glued through the gluing unit to a set length. The transfer unit transfers the double corrugated steel pipe cut by the cutting unit.

A method of manufacturing a double corrugated steel pipe according to the present invention includes the steps of: preforming a contour of an outer plate by bending a central portion of the outer plate to a corrugated shape along a width direction while supplying a steel plate; Preforming the inner plate concavo-convex portion by bending the central portion of the inner plate along at least a part of the outer plate convexo-concave portion while supplying the inner plate of the steel material to the upper side of the outside plate; Pressurizing and laminating the preformed outer and inner plates by pressing and stacking them while guiding the outer plate uneven portions to match the inner plate uneven portions; Winding the laminated outer and inner plates in a spiral direction, overlapping the edge portions of the outer and inner plates along the winding direction, and pressing and joining the outer and inner plates together; Cutting the double-corrugated steel pipe into a predetermined length; And transporting the cut double-corrugated steel pipe.

According to the present invention, the inner plate convexo-concave portion can increase the rigidity of the inner plate, and prevent the inner plate from being deformed when the inner plate is stuck to the outer plate, . Therefore, the failure of the double corrugated steel pipe can be prevented.

1 is a perspective view of a double corrugated steel pipe manufacturing apparatus according to an embodiment of the present invention.
Fig. 2 is a perspective view of the inside / outside sheathing supply unit shown in Fig. 1; Fig.
Figure 3 is a side view of Figure 2;
Fig. 4 is a front view of the outside sheathing preforming unit in Fig. 1; Fig.
Fig. 5 is a front view of the inner plate preforming unit in Fig. 1; Fig.
Fig. 6 is a front view of the guide unit in Fig. 1;
7 is a front view of the tube making unit in Fig.
8 is a view showing a state in which a lock core portion is formed through a gouge unit.
9 is a perspective view illustrating the flange holding unit.
10 is a perspective view illustrating the sleeve holding unit.
11 is a perspective view for explaining an operation example of the sleeve holding unit shown in Fig.

The present invention will now be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. 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 double corrugated steel pipe manufacturing apparatus according to an embodiment of the present invention. Fig. 2 is a perspective view of the inside / outside sheathing supply unit shown in Fig. 1; Fig. Figure 3 is a side view of Figure 2; Fig. 4 is a front view of the outside sheathing preforming unit in Fig. 1; Fig. Fig. 5 is a front view of the inner plate preforming unit in Fig. 1; Fig. Fig. 6 is a front view of the guide unit in Fig. 1; 7 is a front view of the tube making unit in Fig. 8 is a view showing a state in which a lock core portion is formed through a gouge unit.

1 to 8, a double-corrugated steel pipe manufacturing apparatus 100 according to an embodiment of the present invention includes an outer plate supply unit 111, an inner plate supply unit 116, an outer plate preforming unit 121, An inner plate preforming unit 126, a guide unit 130, a tubing unit 140, a cutting unit 150, and a transfer unit 160. [

The outside sheathing supply unit 111 supplies the outer sheath 1 made of steel. The outer plate supply unit 111 can be supplied to the outer plate preforming unit 121 by releasing the outer plate 1 in accordance with the rotation of the outer plate supply reel 112 from the state in which the outer plate 1 is wound around the outer plate supply reel 112. The outside plate supply reel 112 is rotatably supported on the supply table 110. The outer plate supply reel 112 can be pulled out by pulling out the outer sheath 1 as the outer sheath supply reel 112 receives rotation driving force.

The inner plate supply unit 116 supplies the inner plate 2 made of steel to the upper side of the outer sheath 1 supplied from the outer sheath supply unit 111. The inner plate supply unit 116 can be supplied to the inner plate preforming unit 126 by unrolling the inner plate 2 in accordance with the rotation of the inner plate supply reel 117 from the state in which the inner plate 2 is wound around the inner plate supply reel 117. [ The inner plate supply reel 117 is rotatably supported by the supply table 110. The inner plate supply reel 117 is provided with a rotational driving force, and can be taken out by pulling out the inner plate 2 as it rotates.

The inner plate supply reel 117 may be disposed at the same height as the outer plate supply reel 112 on the supply stand 110. In this case, the inner plate supply reel 117 uncovers and draws the inner plate 2 from the upper side, and the outer plate supply reel 112 uncovers and draws the outer plate 1 from the lower side, To the inner plate preforming unit 116 while being spaced apart from the inner plate preforming unit 116.

The outside sheathing preforming unit 121 receives the outside sheathing 1 from the outside sheathing supply unit 111 and bends the central portion of the outside sheathing 1 in a corrugated shape along the width direction to preform the outside sheathing concave portions 1a. The outside sheathing preforming unit 121 can preform the outside sheathing portions 1b and 1c by bending both edges of the outside sheathing 1 in opposite directions. The outside shell preforming unit 121 may include first outside shell forming rolls 122 and second outside shell forming rolls 123.

The first outer-skin forming rolls 122 are arranged in two rows up and down. The first outer plate forming rolls 122 can be preformed by bending the outer plate 1 in a corrugated shape along the width direction of the outer plate 1 while passing through the center portion of the outer plate 1. [ The first outer plate forming rolls 122 are formed in the same shape so that they can be preliminarily formed into the outer plate concave and convex portions 1a having a waveform bending of a predetermined pitch.

The second outer skin forming rolls 123 are disposed on both outermost sides of the first outer skin forming rolls 122. The second outer plate forming rolls 123 are formed by bending one edge portion of the outside sheathing 1 upwardly and bending the other edge portion of the outside sheathing 1 downwardly, (1b, 1c), respectively.

When the outer plate 1 and the inner plate 2 are laminated and wound in the spiral direction, one outer plate bend portion 1b overlaps the other outer plate bend portion 1c to form the inner plate bends 2b and 2c, So that the lock core can be formed as it is press-coupled in this state.

The first and second outer skin forming rolls 122 and 123 are arranged in a plurality of rows along the conveying direction of the outer shell 1 and are configured to preform the outer shell concave and convex portions 1a and the outer shell bends 1b and 1c stepwise . The first and second outer skin forming rolls 122 and 123 may be arranged such that the vertical spacing narrows stepwise along the conveying direction of the outer shell 1. The first and second outer skin forming rolls 122 and 123 may be rotated by receiving a rotational driving force, but they may be rotated by the feeding force of the outside sheathing 1. [

The inner plate preforming unit 126 receives the inner plate 2 from the inner plate supply unit 116 and bends the inner plate 2 along the width direction in such a manner as to surround at least a portion of the outer plate uneven portion 1a at the center portion of the inner plate 2, The uneven portion 2a is preformed. The inner plate preforming unit 126 can preform the inner plate bends 2b and 2c by bending the outer plate bending portions 1b and 1c at the both edge portions of the inner plate 2 so as to overlap with the outer plate bending portions 1b and 1c. The inner plate preforming unit 126 may include first inner plate forming rolls 127 and second inner plate forming rolls 128.

The first inner plate rolls 127 are arranged in two rows so as to be engaged with each other by an up-and-down concave-convex structure. The first inner plate rolls 127 can be preformed by bending along the width direction of the inner plate 2 while passing through the central portion of the inner plate 2. [

The inner plate concavo-convex portion 2a can have at least one or more vaults at a portion facing the outside plate concavo-convex portion 1a. The valley of the inner plate concavo-convex portion 2a is engaged with the outer plate concavo-convex portion 1a while sandwiching the inner plate 2 and the outer plate 1 in a laminated state. Therefore, when the laminated inner plate 2 and the outer sheath 1 are wound while being wound in the spiral direction, the inner sheath 2 is joined to the outer sheath 1 by the engagement of the inner sheath recessed portion 2a and the outer sheath- So that it can be stuck while maintaining the state of close contact without slipping.

The second inner plate rolls 128 are disposed on both outermost sides of the first inner plate rolls 127. The second inner plate forming rolls 128 can preform the inner plate bends 2b and 2c on both edges of the inner plate 2 by bending both edge portions of the inner plate 2 downwardly. When the outer plate 1 and the inner plate 2 are laminated and wound in the spiral direction, the inner plate bends 2b and 2c are contained in the overlapping portions of the outer plate bends 1b and 1c, Allows molding of deep parts.

The first and second inner plate forming rolls 127 and 128 are arranged in a plurality of rows along the conveying direction of the inner plate 2 so as to preliminarily preform the inner plate indentations 1a and the inner plate bends 2b and 2c . The first and second inner plate forming rolls 127 and 128 may be arranged such that the upper and lower intervals are gradually narrowed along the conveying direction of the inner plate 2. [ The first and second inner plate rolls 127 and 128 may be rotated by receiving a rotational driving force, but they may be rotated by the feeding force of the inner plate 2. [

The guiding unit 130 is provided with the outer and inner plates 1 and 2 which are preformed through the outer plate preforming unit 121 and the inner plate preforming unit 126 and pressurized to laminate the outer plates 1 and 2, And is pressurized and laminated while being guided to match the inner plate concave and convex portions 2a. That is, the guiding unit 130 presses the outer sheath 1 and the inner sheath 2 to laminate the corrugation of the outside sheathing concave portion 1a while guiding the sheath of the inside sheathing concave portion 1a to sandwich the mountain.

The guide unit 130 may include upper guide rolls 131 and lower guide rolls 132. The upper guide rolls 131 are constructed in the same manner as the first inner plate forming rolls 127 to support the inner plate concave and convex portions 2a and the lower guide rolls 132 are disposed on the lower side of the first outside plate molding rolls 122, It is possible to support the outside plate uneven portion 1a. Therefore, the upper and lower guide rolls 131 and 132 pressurize the outer panel 1 and the inner panel 2 while guiding the crests of the inner panel concavo-convex portion 2a with the crests of the outer panel concavo- .

The upper and lower guide rolls 131 and 132 may be arranged to be arranged in two or more rows along the conveying direction of the inner and outer plates 1 and 2 so as to gradually laminate the inner and outer plates 1 and 2 have. The upper and lower guide rolls 131 and 132 may be arranged to be gradually narrowed along the conveyance direction of the inner and outer plates 1 and 2. [ The upper and lower guide rolls 131 and 132 may be rotated by receiving a rotational driving force but may be rotated by the feeding force of the inner plate 1 or the outer plate 2. [

For example, the first and second inner plate forming rolls 127 and 128 apply a transfer force to the inner plate 2 to help the inner plate 2 enter and form the inner plate 2. Then, the inner plate 2 enters the guide unit 130, When the concave / convex portion 1a and the inner plate concavo-convex portion 2a are matched with each other, no further feeding force is applied to the inner plate 2. [ Thereafter, when the inner plate 2 and the outer plate 1 are stacked and pressed, the inner plate 2 passes through the guide unit 130 by the feeding force of the outer sheath 2. [

The tube making unit 140 superimposes the edge portions of the outer and inner plates 1 and 2 along the winding direction while winding the outer and inner plates 1 and 2 laminated via the guide unit 10 in the spiral direction, And they are joined together to form a double corrugated steel pipe (3). The graining unit 140 may include first and second graining rolls 141 and 142.

The first tube rolls 141 are arranged vertically so as to be wound in the spiral direction while passing through the laminated outer and inner plates 1 and 2. The first tubular rolls 141 are wound around the outer shell 1 and the inner shell 2 while overlapping the inner and outer shell bends 2b and 1b and the inner and outer shell bends 2c and 1c, Direction.

The second tubular rolls 142 are vertically arranged so that one of the inner and outer sheet bending portions 2b and 1b and the other of the inner and outer sheet bending portions 2c and 1c are in contact with each other in a superposed state. Therefore, the inner and outer sheet bending portions 2b and 1b are pressed and joined to the other inner and outer sheet bending portions 2c and 1c to form the lock core portion, And can be rigidly connected by a lock core portion. The first and second tube rolls 141 and 142 can be rotated by receiving a rotational driving force.

The cutting unit 150 cuts the double corrugated steel pipe 3, which has been formed through the coarse pipe unit 140, into a set length. The cutting unit 150 may include a rotating blade 151 and a blade driving unit 152. The rotary blade 151 rotates about the axial direction parallel to the axial direction of the double corrugated steel pipe 3 at the lower side of the double corrugated steel pipe 3. The double corrugated steel pipe 3 is rotated while moving to the conveying unit 160 while the rotary blade 151 rotates at the lower side of the double corrugated steel pipe 3 to cut the double corrugated steel pipe 3 .

The blade driving unit 152 may include a rotating motor or the like to rotate the rotating blade 151. The blade driving part 152 may be installed on the cutting support 153 so as to be positioned in the longitudinal direction of the double corrugated steel pipe 3. The rotary blade 151 can be positioned according to the position adjustment of the blade driving unit 152, so that the double corrugated steel pipe 3 can be cut to a desired length.

The transfer unit 160 transfers the double corrugated steel pipe 3 cut by the cutting unit 150. The cut double-corrugated steel pipe 3 is pushed by the succeeding double-corrugated steel pipe 3 and proceeds to the transfer unit 160. The cutting support 153 may include rollers 154 for smoothly advancing the cut double-corrugated steel pipe 3 to the transfer unit 160. The rollers 154 can be supported on the cutting support 153 so as to be rotatable about a horizontal axis orthogonal to the axial direction of the double corrugated steel pipe 3.

The transfer unit 160 may include a rotation tray 161. The rotating tray 161 has a structure in which the cut double-corrugated steel pipe 3 can be placed. The rotation tray 161 is supported on the tray support 162 so as to rotate about an axial direction parallel to the axial direction of the double corrugated steel pipe 3. [ The pivoting tray 161 can be conveyed to the cradle 163 as it rotates toward the cradle 163 while receiving the cut double-corrugated steel pipe 3. The rotating tray 161 can be returned by a spring (not shown) after the cut double-corrugated steel pipe 3 is fed. The pivoting tray 161 may be pivoted by an actuator instead of a spring.

According to the above-described double-corrugated steel pipe manufacturing apparatus 100, after the outer plate irregularities 1a are preliminarily formed on the outer plate 1 and the inner plate irregularities 2a are preformed on the inner plate 2, Since the outer panel 1 and the inner panel 2 are stacked and supplied to the gypsum unit 140 with the portion 1a and the inner plate concave and convex portion 2a matched and pressed, It is possible to prevent the inner plate 2 from being displaced to one side or coming off from the deep portion or sagging of the inner plate 2 with respect to the outer sheath 1 after the tubing. Thus, the failure of the double corrugated steel pipe 3 can be prevented.

Meanwhile, the double-corrugated steel pipe manufacturing apparatus 100 may further include a flange holding unit 170 and a sleeve holding unit 180.

9, the flange holding unit 170 is configured to press the flanges 4 in the state where the flanges 4 are assembled to both ends of the double corrugated steel pipe 3 conveyed by the conveying unit 160, And is aligned and held at the set position with respect to the double-corrugated steel pipe 3.

The flange 4 is mounted on both ends of the double corrugated steel pipe 3 so as to be assembled with another double corrugated steel pipe 3 to improve the workability. The flange 4 may be configured to wrap the end portion of the double corrugated steel pipe 3 in a divided form. The flange 4 can be joined to the end of the double corrugated steel pipe 3 by welding after the fastened pieces of the divided end are bolted and fixed to the end of the double corrugated steel pipe 3. The operation of fitting the flange 4 into the end portion of the double corrugated steel pipe 3 and assemble it may be done manually or by a robot or the like.

The flange holding unit 170 presses the outer end of the flange 4 fitted with the end portion of the double corrugated steel pipe 3 and keeps the same at the outer end of the double corrugated steel pipe 3. In this state, the worker bolts the flange 4 and then welds the flange 4 to the double corrugated steel pipe 3. [ Therefore, the flange 4 can be completely assembled in a state where the outer end thereof coincides with the outer end of the double corrugated steel tube 3, so that the watertight sleeve 5 can be prevented from occurring in the state where the watertight sleeve 5 is mounted on the flange 4 have.

The flange holding unit 170 may include a pressing block 171 and an actuator 172 for the pressing block. The pressing block 171 moves linearly to the outer end of the flange 4 and presses it. The pressing block 171 may be arranged to have a height smaller than the outer diameter of the flange 4 and to press the lower region of the flange 4. The pressing block 171 may be made of a metal such as a steel material. The actuator 172 for the pressure block is composed of a cylinder or the like and can move the press block 171 linearly.

10 and 11, the sleeve holding unit 180 presses the watertight sleeves 5 in the state where the watertight sleeves 5 are respectively assembled to the flanges 4, Align to the set position and keep it. The watertight sleeve 5 is made of rubber or the like in the form of a closed loop, and is configured so as to enclose and fit the outer end of the flange 4. The watertight sleeve 5 allows the double corrugated steel tubes 3 to be sealed with the flanges 4 assembled.

The sleeve holding unit 180 presses the outer end of the watertight sleeve 5 that holds the outer end of the flange 4 and holds it in position with respect to the flange 4. In this state, the worker can prevent the watertight sleeve 5 from coming off during the transportation or assembling of the double-corrugated steel pipe 3 by fastening the outer peripheral edge of the watertight sleeve 5 with the fastening band.

The sleeve holding unit 180 may include a pressure plate 181 and a pressure plate actuator 183. The pressure plate 181 linearly moves to the outer end of the watertight sleeve 5 and presses it. The pressure plate 181 may be arranged to press the entire area of the watertight sleeve 5 with an outer diameter larger than the outer diameter of the watertight sleeve 5. The pressure plate 181 may be made of a metal such as a steel material.

The pressure plate 181 may have guide holes 181a elongated in the radial direction. The pressing member 182 is inserted into the guide hole 181a and can be positioned along the guide hole 181a. The pressing members 182 are positioned to press the outer end of the watertight sleeve 5 in the radial direction so that the watertight sleeve 5 can be positively positioned with respect to the flange 4. [ The pressing member 182 may be made of rubber or the like.

The actuator 183 for the pressure plate is made of a cylinder or the like and can move the pressure plate 181 linearly. The height of the pressure plate 181 can be adjusted as the actuator 183 for the pressure plate is lifted and lowered by the lifting actuator 184. Therefore, the pressure plate 181 is height-adjusted according to the outer diameter of the double corrugated steel tube 3, so that the watertight sleeve 5 can be uniformly pressed.

A method of manufacturing a double-corrugated steel pipe according to an embodiment of the present invention will now be described.

The outer plate 1 is bent at a central portion of the outer plate 1 along the width direction while supplying the outer plate 1 of steel material to preliminarily mold the outside plate uneven portion 1a. At this time, it is possible to preliminarily mold the outer plate concavo-convex portion 1a having the waveform bending of a predetermined pitch.

At the time of preliminarily forming the outer plate uneven portion 1a, both edge portions of the outside sheathing 1 can be bent in opposite directions to preform the outside sheathing portions 1b and 1c. That is, one edge portion of the outside sheathing 1 can be bent upward, and the other edge portion of the outside sheathing 1 can be bent downward.

Then, while supplying the inner plate 2 with the steel material to the upper side of the outer sheath 1, the inner sheath portion 2a is bent at a central portion of the inner sheath 2 so as to cover at least a part of the outside sheath portion 1a, . Here, the inner plate concave and convex portion 2a can have at least one or more vaulted portions on the portion facing the outside plate concavo-convex portion 1a. The valley of the inner plate concavo-convex portion 2a is engaged with the outer plate concavo-convex portion 1a while sandwiching the inner plate 2 and the outer plate 1 in a laminated state.

It is possible to preform the inner plate bends 2b and 2c by bending the outer plate bends 1b and 1c in such a manner as to overlap with the outer plate bends 1b and 1c at both edge portions of the inner plate 2 during preforming of the inner plate concave- . At this time, both edge portions of the inner plate 2 can be bent downwardly.

Subsequently, the preformed outer and inner plates 1 and 2 are pressed and laminated while being guided so as to match the outer plate concave and convex portions 1a and the inner plate concave and convex portions 2a. That is, the outside sheath 1 and the inner sheath 2 are pressed and laminated while guiding the mountain of the outside sheave concave portion 1a to be sandwiched between the crests of the inside sheath concave and convex portions 2a.

Subsequently, while the laminated outer and inner plates 1 and 2 are wound in the spiral direction, the edge portions of the outer and inner plates 1 and 2 are superimposed along the winding direction and are compression bonded to each other to form a double corrugated steel tube 3 . At this time, the lock core portion can be formed by pressing and bonding one of the inner and outer sheet bend portions 2b, 1b to the other inner and outer sheet bend portions 2c, 1c.

Subsequently, the double-corrugated steel pipe 3 is cut into a predetermined length. The double corrugated steel pipe 3 is rotated while moving to the conveying unit 150 while the rotary blade 151 rotates at the lower side of the double corrugated steel pipe 3 to cut the double corrugated steel pipe 3 .

Then, the cut double-corrugated steel pipe 3 is transferred. At this time, the pivoting tray 161 can be transferred to the cradle 163 as it rotates toward the cradle 163 while receiving the cut double-corrugated steel tube 3.

Then, the flanges 4 are respectively assembled to both ends of the conveyed double corrugated steel pipe 3. At this time, the flange 4 can be sandwiched between the end portions of the double corrugated steel pipe 3. Subsequently, the assembled flanges 4 are pressed and held in alignment with the double-corrugated steel tubes 3 at the setting positions, and then the flanges 4 are fully assembled to the corresponding double corrugated steel tubes 3. [ At this time, the outer end of the flange 4 fitted with the end portion of the double corrugated steel pipe 3 is pressed and held in the state of being coincided with the outer end of the double corrugated steel pipe 3, 4 can be welded to the double corrugated steel pipe 3.

The watertight sleeves 5 are then assembled to the finally assembled flanges 4, respectively. At this time, the watertight sleeve 5 can be glued together so as to sandwich the outer end of the flange 4. The water-tight sleeves 5 are then fully assembled into the corresponding double corrugated steel tubes 3 after pressing the water-tightly sealed sleeves 5 by pressing them and aligning and holding them at the set positions with respect to the flanges 4. At this time, the outer end of the watertight sleeve 5 with the outer end of the flange 4 is pressed against the flange 4, and then the outer end of the watertight sleeve 5 is wound around the flange 4 with a fastening band have. When these processes are performed, the manufacture of the double corrugated steel pipe 3 can be completed.

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.

1 .. Plywood
1a.
2 .. board
2a.
3 .. Double Wave Steel Pipe
4. Flange
5. Watertight sleeve
111 .. External plate supply unit
116 .. Internal plate supply unit
121. Container preforming unit
126. Inboard preforming unit
130 .. Guide unit
140 .. Canned unit
150 .. cutting unit
160 .. Transfer Unit
170 .. Flange retaining unit
180 .. Sleeve holding unit

Claims (4)

An outer plate supply unit for supplying a steel plate outer plate;
An inner plate supply unit for supplying a steel inner plate to an upper side of the outer sheath supplied from the outer sheath supply unit;
An outer sheath preforming unit that receives the outer sheath from the outer sheath supply unit and bends the central portion of the outer sheath in a corrugated shape along the width direction to preform the sheath corrugated portion;
An inner plate preforming unit which receives the inner plate from the inner plate supply unit and bends the central portion of the inner plate along at least a part of the outer plate uneven portion to preform the inner plate uneven portion;
A guiding unit for pressing and stacking the outer and inner plate preforming units and the inner plate preforming unit through preliminarily provided outer plates and inner plates for pressurizing and laminating, while guiding the outer plate uneven portions and the inner plate uneven portions to be matched;
A gubrication unit which winds the outer and inner plates laminated via the guide unit in a helical direction and overlaps the edge portions of the outer and inner plates along the winding direction,
A cutting unit that cuts the double corrugated steel pipe that has been formed through the tubing unit into a set length;
A transfer unit for transferring the double corrugated steel pipe cut by the cutting unit;
A flange holding unit which presses the flanges in a state where flanges are respectively assembled to both ends of the double corrugated steel pipe conveyed by the conveying unit and aligns and holds the flanges to the setting position with respect to the double corrugated steel pipe; And
And a sleeve holding unit that presses the watertight sleeves in a state where the watertight sleeves are respectively assembled to the flanges and aligns and holds the watertight sleeves at a set position with respect to the flanges,
In the outside sheathing preforming unit,
First outer plate forming rolls arranged in two rows so as to be vertically staggered to each other and bent in a wave form along the width direction of the outer plate while passing through a central portion of the outer plate to preform the outer plate uneven portion; And second outside skin forming rolls preforming skin skin folds at both edges of the shell skin;
The inner plate preforming unit comprises:
First inner plate forming rolls arranged in two rows so as to be engaged with each other by an up-and-down concave-convex structure to bend along the width direction of the inner plate while passing through the central portion of the inner plate, And second inner plate forming rolls for preforming inner plate bends at both edge portions of the inner plate,
The guide unit includes:
Upper guide rolls supporting the inner plate concave-convex portion in the same configuration as the upper first inner plate forming rolls of the first inner plate forming rolls, and upper guide rolls having the same configuration as the first outer plate forming rolls on the lower one of the first outside- And the lower and upper guide rolls supporting the outer plate concavo-convex portion, the outer plate and the inner plate are pressed and stacked while being guided so as to surround the mountain of the outer plate concave-
Wherein the upper and lower guide rolls are arranged in a plurality of rows along the conveying direction of the inner and outer sheathing plates, and are disposed so as to be stepwise narrower, and pressurize and laminate the inner and outer sheathing plates stepwise;
The flange-
A pressing block having a height of a size smaller than the outer diameter of the flange and arranged to press the lower region of the flange and move linearly to the outer end of the flange and press the pressing block and an actuator for the pressing block linearly moving the pressing block;
Wherein the sleeve-
A pressure plate which has an outer diameter larger than the outer diameter of the watertight sleeve and is arranged to press the entire area of the watertight sleeve and linearly moves to the outer end of the watertight sleeve and presses the same, And a pressure plate actuator for linearly moving the pressure plate, wherein the actuator for the pressure plate is moved up and down to move the pressure plate actuator in the axial direction along the outer diameter of the double- And an elevating actuator for adjusting the height of the pressure plate. delete A method for producing a double corrugated steel pipe by the double-corrugated steel pipe producing apparatus according to claim 1,
Bending the central portion of the outer sheath in a corrugated shape along the width direction while supplying the outer sheath of the steel material, and preforming the outer sheath convexo-concave portion;
Preforming the inner plate concavo-convex portion by bending the central portion of the inner plate along at least part of the outer plate concavo-convex portion while supplying the inner plate of the steel material to the upper side of the outside plate;
Pressurizing and laminating the preformed outer and inner plates by pressing and stacking the outer and inner plates so as to match the outer plate uneven portions and the inner plate uneven portions;
Winding the laminated outer and inner plates in a spiral direction, overlapping the edge portions of the outer and inner plates along the winding direction, and pressing and joining the outer and inner plates together;
Cutting the double-corrugated steel pipe into a predetermined length;
Transferring the cut double-corrugated steel pipe;
Assembling the flanges to both ends of the conveyed double corrugated steel pipe;
Pressurizing the assembled flanges to align and hold the double-corrugated steel tubes at a set position, and then fully assembling the flanges to the corresponding double corrugated steel tubes;
Assembling the watertight sleeves respectively to the finally assembled flanges;
Tightly sealing the water-tight sleeves to align them to a set position with respect to the flanges, and then fully assembling the water-tight sleeves to the corresponding double corrugated steel tubes;
Further comprising the steps of: delete

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