KR100589560B1 - Corrugated pipe and its manufacturing apparatus - Google Patents

Abstract

Provided are a corrugated pipe having a structure capable of efficiently cooling / heating an object filled therein while varying a conveying speed of a fluid introduced into a pipe, and a manufacturing apparatus thereof. The corrugated pipe is an inner tube; The inner tube is inserted therein, and is composed of an outer tube fixing the inner tube inserted therein by a helical groove of a predetermined width that is press-molded in the outer peripheral portion in the longitudinal direction. And the corrugated pipe manufacturing apparatus is formed with at least one insertion hole which is vertically penetrated in a state inclined at a predetermined angle, and a guide bar is formed on one side adjacent to the tip of the insertion hole and assembled on the upper surface of one side of the base and And a fixing plate inserted into the insertion holes and fixing plates coupled to the lower portion of the insertion hole to fix and support the wrinkle forming blade to the wrinkle forming flat plate, and a length on an upper surface of the body on which the wrinkle forming flat plate is located. A movable plate guide rail fixedly installed in a direction; Coupled to the upper portion of the slider sliding back and forth coupled to the flat guide rail, an injection hole for injecting a cylindrical tube supplied from the outside into the upper portion of the corrugated forming plate is formed at the front end and is connected to the piston rod of the air cylinder It consists of a flat plate.

Corrugated pipe, corrugated plate, corrugated blade, movable plate

Description

Corrugated pipe and its manufacturing apparatus {CREASE PIPE AND MAKING EQUIPMENT THEREOF}             

1 is a schematic configuration diagram of a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

Figure 2 is an isolated perspective configuration of the pleated flat plate of the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

3 is an exploded cross-sectional view illustrating a coupling relationship between a wrinkled flat plate and a wrinkled molding blade of a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

4 and 5 is an assembled cross-sectional view showing a state of assembling the wrinkle forming blade of the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention to the wrinkle forming plate.

Figure 6 is an exemplary view showing a state in which the tube in the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

7 is a view showing a state in which the initial position of the tube by the guide bar when the tube is inserted into the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

8 is an exemplary view showing a state in which a corrugated pipe is manufactured by a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

9 is a view showing a corrugated pipe manufactured by a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

10 is an exemplary view showing a state of the helical groove formed in the outer peripheral portion of the tube according to the type of wrinkle forming blade according to a preferred embodiment of the present invention.

11 and 12 are views showing another corrugated pipe manufactured by a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention.

<< Explanation of symbols used in the main part of the drawing >>

10: corrugated pipe manufacturing apparatus, 12: piston rod,

14: air cylinder, 16: control box,

18: gas, 20: wrinkle forming blade,

22: guide bar, 24: pleated flat plate,

26: guide rail, 28: sliding groove,

30: slider, 32: guide,

34: injection hole, 36: movable forming plate,

38: post load, 40, 42: detection sensor,

44: insertion hole, 46, 49: fixed plate,

48: bolt, 51: insertion groove.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe for conveying a fluid such as a liquid or a gas, and a manufacturing apparatus thereof. In particular, the present invention efficiently changes an object filled therein while changing a conveying speed of a fluid introduced into a pipe. A corrugated pipe having a structure capable of cooling / heating and a manufacturing apparatus thereof.

In general, a pipe used for a fluid transfer line such as gas and liquid has a smooth surface of the outer circumference and the inner circumference as is well known. As described above, a tube having a shape in which the outer and inner circumferences are smoothly processed has been circulated or transported to achieve a desired purpose. For example, a method of cooling a device by supplying cooling water to such a pipe is usefully applied to a cooling device of a device that generates heat.

However, when the cooling fluid is transported by using a normal pipe made of smooth inner and outer circumferences, the conveying speed of the fluid is determined only by the conveying pressure of the device. In order to increase the feed rate has the disadvantage of increasing the feed pressure of the device. In addition, the structure of the tube used in the cooling device for supplying the fluid heated by the operation of the device to the inside of the tube to cool has a single layer structure, which results in poor cooling efficiency.

Conventional corrugated pipe and corrugated pipe manufacturing apparatus for solving the above problems include the Utility Model No. 332002 (Wrinkle pipe manufacturing apparatus and corrugated pipe manufactured thereby) registered utility model October 13, 2003 by the applicant of the present application Can be.

However, the pre-registered registration proposal only discloses a corrugated pipe having a single structure and is not applicable to a place requiring insulation such as a power line. In addition, the registration proposal has a structure that is fixed to the wrinkle forming blade for forming a wrinkle groove in the outer circumference of the pipe, there is a problem that the wrinkle forming plate itself must be replaced to mold a variety of wrinkles on the outer circumference of the pipe.

On the other hand, various types of tubes are used to protect the sheath of a power line (power line) installed in an environment where the temperature of the device is very high and to supply better power. For example, a power line was inserted into an inner circumference of a tube made of metal or high strength plastic to protect the covering of the power line. However, the method of protecting the covering of the power line as a single tube as described above has a problem that can not be used because the ambient temperature is transferred to the tube as it is when the temperature around the place where the power line is inserted is very high.

SUMMARY OF THE INVENTION An object of the present invention is to provide a corrugated pipe having a structure that can form various types of helical grooves or lines on the outer circumference of the pipe so as to change a transfer speed of a fluid such as liquid and gas.

Another object of the present invention is to provide a corrugated pipe having a structure to increase the moving speed of the fluid introduced into the interior and to easily control the temperature of the injected fluid.

Another object of the present invention is to form a helical groove / prominence line on the outer periphery / inner circumference of the tube along the longitudinal direction of the tube to transfer the fluid flowing into the tube at high speed with a small conveying pressure To provide a corrugated pipe having a structure that can be.

Still another object of the present invention is to provide a double corrugated pipe having a structure capable of cooling or heating a temperature of a fluid introduced into a pipe and conveyed at a high speed.

Still another object of the present invention is to provide a corrugated pipe manufacturing apparatus for manufacturing a corrugated pipe by forming various types of helical corrugated grooves / protrusion lines in the outer and inner circumferences of the tube along the longitudinal direction of the tube.

Still another object of the present invention is to provide a corrugated pipe manufacturing apparatus for easily replacing a forming blade to selectively form various types of corrugated grooves on the outer and inner circumferences of the tube along the longitudinal direction of the tube.

The present invention for achieving the above object is an inner tube having an inner diameter of a predetermined size; The inner tube is inserted into the inner tube, and a helical groove having a predetermined width in the longitudinal direction is formed by pressure forming the outer tube to fix the inner tube inserted therein. It features.

The helical groove formed on the outer circumference of the outer tube is preferably press-molded in the longitudinal direction of the outer tube with a predetermined inclination (pitch angle) and pitch.

Preferably, the helical groove is a helical groove line formed continuously.                         

Inside the inner tube is characterized in that a conductor, for example, a power line through which a current flows.

The inner circumference of the inner tube is coated with an insulating material of synthetic resin to insulate the inner tube from the outer tube to insulate the object inserted into the inner tube from the outer tube.

The material of the inner tube and the outer tube is characterized in that the metal is made of good conductivity such as copper, aluminum, stainless steel.

According to another aspect of the present invention, a corrugated pipe manufacturing apparatus includes a control box coupled to an upper portion of a machine body to control an operation of an air cylinder reciprocating a piston rod; At least one insertion hole penetrated up and down in a state inclined at a predetermined angle is formed, and a guide bar is formed at one side adjacent to the tip of the insertion hole to form a corrugated flat plate assembled to one side of the upper surface of the body, and the insertion holes. Movable plates fixed to the corrugated blade inserted into the lower portion of the insertion hole and fixed to support the corrugated blade fixed to the corrugated flat plate, and to a longitudinal direction on an upper surface of the body on which the corrugated flat plate is located. Flat guide rails; Coupled to the upper portion of the slider sliding back and forth coupled to the flat guide rail, an injection hole for injecting a cylindrical tube supplied from the outside into the upper portion of the corrugated forming plate is formed at the front end and is connected to the piston rod of the air cylinder It is characterized by consisting of a flat plate.

A post rod is installed on the rear end side of the movable forming plate, and two sensing sensors are provided on the gas corresponding to the position of the front end and the rear end of the corrugated forming plate. The control box is configured to drive the air cylinder to move forward and backward the piston rod according to the outputs of the two detection sensors.

The wrinkle forming blade installed on the wrinkle forming plate is formed by pressing the outer periphery of the tube located between the wrinkle forming plate and the movable forming plate to form a helical groove, the helical inside the tube by the formation of the helical groove It is preferable that the protrusion line is formed so as to protrude appropriately to the upper portion of the pleated flat plate.

The upper surface of the wrinkle-forming blade protruding to the upper portion of the wrinkle-forming flat plate is a rounded curved surface, it is preferable that both of the protruding end is formed to form a gentle curved stone.

In addition, the wrinkle forming blade is preferably produced so that both sides, the central portion or only one end portion protrudes into the wrinkle forming flat plate to be able to selectively form the formation of the helical groove.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings in which: FIG. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art. It should also be noted that detailed descriptions of well-known functions and configurations in the art that may unnecessarily obscure the subject matter of the present invention are omitted.

1 is a schematic configuration diagram of a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention, Figure 2 is an exploded perspective configuration diagram extracting a wrinkle forming plate of the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention, Figure 3 Separated cross-sectional view for explaining the coupling relationship between the pleated flat plate and the pleated forming blade of the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention. 4 and 5 are assembled cross-sectional views showing a state in which the wrinkle forming blade applied to the corrugated pipe manufacturing apparatus according to an embodiment of the present invention assembled to the wrinkle forming plate. And Figure 6 is an exemplary view showing a state in which the tube is inserted into the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention, Figure 7 is a tube when the tube is inserted into the corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention 8 is a view showing a state in which the initial position of the tube is determined, Figure 8 is an exemplary view showing a state in which the corrugated pipe is manufactured by a corrugated pipe manufacturing apparatus according to a preferred embodiment of the present invention. 9 is a view showing a corrugated pipe of a single layer structure manufactured by preferred embodiments of the present invention.

1 to 2, the corrugated pipe manufacturing apparatus 10 according to an embodiment of the present invention is a control box 16 for controlling the operation of the air cylinder 14 for reciprocating the piston rod 12 is a gas 18 Is coupled to one side of the top of the). At least one or more wrinkle forming blades 20 are assembled on the upper surface of one side of the base 18 so as to protrude upward at an angle, and the guide bar 22 is adjacent to the front end of the wrinkle forming blades 20. Is formed on the corrugated flat plate 24. The guide rails 26 are fixed to both sides of the upper surface of the base 18 on which the wrinkle-forming flat plate 24 is located in the longitudinal direction. The guide rail 26 has a sliding groove 28 is formed, the guide groove 32 is extended to the lower portion of the slider 30 is coupled to the sliding groove 28. In the upper portion of the slider 30, an input slot 34 for injecting a cylindrical tube supplied from the outside into the upper portion of the corrugated flat plate 24 is formed at the tip thereof to form a piston of the air cylinder 14. The movable forming plate 36 connected to the rod 12 is coupled.

At this time, a post rod 38 is installed at the rear end side of the movable forming plate 36, and two of the bases 18 corresponding to the positions of the front end and the rear end of the corrugated forming plate 24 are provided. The sensing sensors 40 and 42 are installed, and the control box 16 moves the piston rod 12 forward and backward according to the outputs of the two sensing sensors 40 and 42. ).

In the above configuration, the gap (gab) between the corrugated flat plate 24 and the movable flat plate 36 located above is determined according to the thickness of the guide rail 26 and the slider 30, This thickness should be appropriately designed in consideration of the diameter of the tube introduced into the injection hole 34 of the movable forming plate 26.

3 and 4, the corrugated forming plate 24 has an insertion hole for a crimping blade penetrating up and down in a diagonal direction having an inclination of about 30 kPa to 50 kPa, preferably about 45 kPa. 44 is formed. The wrinkle forming blade 20 is inserted into the insertion hole 44 of the wrinkle forming flat plate 24, and the wrinkle forming blade 20 is fastened to the wrinkle forming flat plate 24 by bolts 48 at the lower portion thereof. The fixed plate 46 is coupled.

5 shows another embodiment in which the wrinkle forming blade 20 is fixedly installed on the wrinkle forming flat plate 24. That is, unlike FIG. 4, an insertion hole 44 penetrating up and down in an inclined state at a predetermined angle of the wrinkle forming flat plate 24 is formed, and an insertion groove extending laterally to the lower portion of the insertion hole 44 ( 51 is formed, and the insertion groove 51 is fitted into the fitting projection 53 of the fixing plate 49 is a structure for fixing the crimping blade 20 fitted in the insertion hole 44.

First, a process of manufacturing a corrugated pipe by molding a helical groove or a helical groove line on the outer circumference of the single pipe 100 using the corrugated pipe manufacturing apparatus 10 according to the embodiment of the present invention.

Now, the movable shaping plate 36 of the corrugated pipe manufacturing apparatus 10 is in an initial state as shown in FIG. 6, that is, the post-rod 38 is located above the sensing sensor 26. A cylindrical tube 100 is introduced into the injection hole 34 formed at the tip of the 36.

The tube 100 introduced into the input hole 34 is located between the bottom surface of the movable molding plate 36 and the wrinkle forming blade 20 installed on the upper surface of the wrinkle forming plate 24, as shown in FIG. 6. Done. At this time, the guide bar 22 installed on one side of the wrinkle-forming flat plate 24 guides the initial position of the tube 100 introduced into the injection hole 34 as shown in FIG. That is, the guide bar 22 guides the tip of the tube 100 positioned between the corrugated flat plate 24 and the movable flat plate 36 as shown in FIG. 6. The shape of this guide bar 22 has a rectangular shape as shown in FIG. 2.

6, the driving switch of the control box 11 installed in the base 10 is selected in a state in which the tube 100 introduced as shown in FIG. 6 is located at the bottom of the movable forming plate 30. When the drive switch of the control box 11 is selected, the air cylinder 14 is operated by the air generated in the air compressor (not shown) to advance the piston rod 12. When the piston rod 12 is advanced, the movable forming plate 36 connected to the piston rod 12 is lowered to the slider 30 and the guide rail 26 fixed to the upper portion of the base 18. The tube 100 is moved forward while sliding.

The tube 100 moved forward by the movable flat plate 36 has a friction with respect to the bottom surface of the movable flat plate 36 and the upper surface of the corrugated flat plate 24 and is moved while rolling. At this time, since the corrugated blade 21 is assembled so as to protrude a predetermined length to the upper surface of the corrugated flat plate 24, the pipe 100 that is moved in accordance with the advance of the movable flat plate 36 forms a diagonal line. The upper portion of the wrinkle forming blade 20 passes as shown in FIG. Therefore, a helical groove or a helical groove line 102 having a screw shape is formed in the outer circumferential portion of the tube 100 as shown in FIG. 9. At this time, if the protruding length of the wrinkle forming blade 20 is about 0.5mm or more, the protruding length of the wrinkle forming blade 20 can be appropriately adjusted according to the depth of the helical groove 102.

As described above, the helical groove or the helical groove line 102 is formed on the outer circumferential portion of the tube by the forward movement of the movable forming plate 36. At this time, when the pots rod 38 installed on the side of the movable forming plate 36 advanced as described above is located on the upper side of the detection sensor 42, the post sensor 38 in the detection sensor 42 Sensing and transmitting the position-detected signal to the controller of the control box 16. The piston rod 12 of the air cylinder 14 is reversed by the signal sensed by the detection sensor 42 as described above, and the movable forming plate 36 connected to the piston rod 12 is interlocked with each other. Will be moved to the original location.

Movable flat plate 36 moving to the initial position as described above is the corrugated flat plate 20 to the tube 100 is formed, the end of the helical groove or helical groove line 102 formed out of the rear end of the corrugated flat plate 24 Will fall off.

As described above, when the production of one corrugated pipe is completed, the next corrugated pipe is manufactured by operating the drive switch of the control box 16. When performing the secondary work, the movable flat plate which is out of the corrugated flat plate 24 is performed. 36 is positioned on the upper side of the sensor 20 is installed on the side of the wrinkle forming plate 24 as shown in FIG.

The movable forming plate 36 may be initially positioned in the corrugated forming plate 24 by a post box 38 installed in the movable forming plate 36 by the sensing sensor 40 and detected by a control box ( 16) is controlled. In the above state, when the tube is inserted into the injection hole 34 formed in the movable forming plate 36, the corrugated tube is repeatedly manufactured while repeating the above-described operation.

As described above, the unit area of the pipe 100 can be increased by compression molding the helical groove or the helical groove line 102 to the outer circumference of the pipe 100, and the inner circumference portion is formed by the formation of the helical groove line 102. When the projection line 104 is formed in the transfer of the cooling gas or liquid, it is possible to change the transfer speed and improve the thermal conductivity by a high area ratio, thereby maximizing the efficiency when using as a cooling pipe.

9 is an exemplary view of a tube manufactured by the pie manufacturing apparatus according to the present invention. When sending a gas or a liquid (fluid) using the corrugated pipe manufactured by the manufacturing apparatus of this invention, a unit corrugated pipe is connected and used.

When the corrugated pipe is connected, the connection method varies depending on the helical groove 102 formed in the pipe. When the helical groove 102 is formed to both ends, it is connected by butt welding in the state of cutting back, and when connecting the corrugated pipe in which the helical groove 102 is not formed at both ends, one of the two ends is extended and connected. Done.

When the gas or the liquid is sent to the corrugated delivery line connected as described above, the fluid such as the gas or liquid introduced into the interior by the helical protrusion line 104 formed as the inner circumference is pivoted and conveyed, so that the conveying speed is accelerated. The delivery pressure is to be increased. The discharge pressure is to vary depending on the pitch angle of the helical groove (102).

The corrugated pipe having a single layer structure shown in FIG. 9 can be very usefully used to cool the device by circulating a coolant or a cooling gas in a cooling device.

In the above description, the corrugated pipe formed by forming the helical groove 102 on the outer circumferential portion of the cylindrical tube 100 has been described. However, the helical groove 102 varies according to the shape of the wrinkle forming blade 20 installed on the wrinkle forming flat plate 24. It can be shaped into a shape. For example, selectively inserting different shape wrinkled blades 20 into the insertion holes 44 of the wrinkled flat plate 24 described in FIGS. 3 to 5 as shown in a1 to a6 of FIG. Thus, the helical grooves or lines 102 shown in b1 to b6 of FIG. 10 may be formed on the outer circumference of the tube 100.

As shown in b1 to b6 of FIG. 10, the helical grooves or lines 102 having different shapes may be selectively used according to the type of fluid such as gas or liquid that is discharged into the tube 100.

11 and 12 show a cross-sectional structure of a double corrugated pipe 120 according to another embodiment of the present invention manufactured using the corrugated pipe manufacturing apparatus 10 described above.

Referring to FIG. 11, the double corrugated pipe 120 has an inner tube 106 having a shape of a general cylindrical tube inserted into the tube 100, and the inner tube 106 is formed of the tube 100. The inner tube 106 is fixed to the inside of the tube 100 by the protrusion line 104 formed on the inner circumference by the helical groove 102 press-molded on the outer circumference.

This structure can be easily manufactured using the corrugated pipe manufacturing apparatus 10 described above. For example, when the tube 100 into which the inner tube 106 is inserted is inserted into the injection hole 34 of the movable forming plate 36 shown in FIGS. 1 to 2, the tube 100 is manufactured in the form shown in FIG. 11.

Injecting gas or liquid into the inner 112 of the inner tube 106 of the double corrugated pipe 120 shown in FIG. 11 to be transported, and forming the helical groove or the helical line 102 to form the inner tube ( By supplying a cooling water or a cooling gas to the inside 111 of the tube (outer tube) 120 having a higher area ratio than the 106, the temperature of the gas or liquid flowing into the inner tube can be cooled quickly.

12 illustrates a cross-sectional structure of a double corrugated pipe 130 having a structure in which a power line 110 is inserted into an inner tube 106 and a synthetic resin, which is a non-conductor, is coated on a surface thereof. In order to manufacture such a double corrugated pipe 130, the inner tube 106 coated with a polyester-based synthetic resin should be inserted into the inside of the tube 100, and then the process mentioned in FIG. . The double corrugated pipe 130 having the structure as shown in FIG. 12 may be very useful for protecting the power line when the power line is installed in an environment having a high heat around.

As described above, the corrugated pipe and the apparatus for manufacturing the same according to the present invention form a screw-shaped helical groove along the longitudinal direction of the tube to the outer circumference of the tube and simultaneously form a screw-shaped helical protrusion line into the inner circumference to form the corrugated pipe. Not only can the flowing gas or liquid be rotated and the transfer pressure can be increased, and the fluid can be circulated smoothly even by the output pressure to a device with a small output capacity. It is a very useful invention that can be increased. In addition, by pressing the helical groove on the outer circumference of the outer tube to securely couple the inner tube inserted into the outer tube to the outer tube without any equipment, the object having a high / or low temperature inserted into the inner tube. The temperature can be controlled effectively.

Claims (13)

In the corrugation tube, An inner tube having an inner diameter of a predetermined size; The inner tube is inserted therein, the corrugated pipe, characterized in that consisting of an outer tube fixed to the inner tube inserted into the interior by a helical groove of a predetermined width press-molded in the outer peripheral portion in the longitudinal direction. The corrugated pipe according to claim 1, wherein the helical groove formed on the outer circumferential portion of the outer tube is press-molded in the longitudinal direction of the outer tube with a predetermined slope and pitch. 3. A corrugated pipe according to claim 2, wherein the helical groove is a continuously formed helical groove line. The corrugated pipe according to any one of claims 1 to 3, wherein a power line is inserted into the inner tube. The corrugated pipe according to claim 4, wherein an outer tube of the inner tube is covered with an insulating material of synthetic resin to insulate the inner tube from the outer tube to insulate an object inserted into the inner tube from the outer tube. The corrugated pipe according to claim 5, wherein the material of the inner tube and the outer tube is a metal having good conductivity. In the corrugated pipe manufacturing apparatus, A control box coupled to an upper portion of the gas to control an operation of the air cylinder reciprocating the piston rod; At least one insertion hole penetrating up and down in an inclined state at a predetermined angle is formed, and a guide bar is formed at one side adjacent to the tip of the insertion hole and is assembled to an upper surface of one side of the base; A fixing plate inserted into the insertion hole and a lower plate coupled to a lower portion of the insertion hole to fix and support the wrinkle forming blade to the wrinkle forming flat plate; A movable plate guide rail fixedly installed in a longitudinal direction on an upper surface of the base on which the corrugated flat plate is located; Coupled to the upper portion of the slider sliding back and forth coupled to the flat guide rail, an injection hole for injecting a cylindrical tube supplied from the outside into the upper portion of the corrugated forming plate is formed at the front end and is connected to the piston rod of the air cylinder Corrugated pipe manufacturing apparatus characterized by comprising a flat plate. The corrugated pipe manufacturing apparatus according to claim 7, wherein the fixing plate is coupled to a bolt formed at a lower portion of the corrugated molding plate by bolts. The method of claim 7, wherein the pleated flat plate is formed with at least one insertion hole penetrating up and down in a state inclined at a predetermined angle, an insertion groove extending to the side is formed in the lower portion of the insertion hole, the insertion The corrugation pipe manufacturing apparatus characterized by the insertion protrusion of the shaping | molding blade fixing plate which fixes the crimping | molding blade inserted in the shovel hole. According to claim 7, Post rods (post rod) is provided on the rear end side of the movable forming plate, and two sensing sensors are provided on the gas corresponding to the position of the front end and the rear end of the corrugated forming plate And the control box drives the air cylinder to move forward and backward the piston rod according to the outputs of the two detection sensors. The corrugated pipe manufacturing apparatus according to claim 7, wherein the protruding length of the corrugated blade is at least 0.5 mm or more. The corrugated pipe according to any one of claims 7 to 11, wherein the upper surface of the corrugated blade protruding to the upper portion of the corrugated flat plate is a rounded curved surface, and the protruded both ends are formed in a gentle curve. Manufacturing device. 12. The wrinkle-forming blade according to any one of claims 7 to 11, wherein the wrinkle-forming blade has a shape of irregularities in the whole part in the longitudinal direction, a part on both sides, a part in the center, one part of both ends, or the whole part in the longitudinal direction. Corrugated pipe manufacturing apparatus, characterized in that for forming a helical groove line or a helical groove selectively formed on the outer peripheral portion of the injected tube.

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