JP3368249B2 - Metal tube supply device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal pipe supply device for use in, for example, a water jet device, which supplies a metal pipe through which a high-pressure fluid flows.

[0002]

2. Description of the Related Art For example, when repairing a concrete structure such as a road or a tunnel, it is necessary to carry out a chipping work of an existing concrete. In the past, this was done by mechanical impact using a rock drill etc., but there are problems such as noise and vibration, and instead, a method using a high-pressure water jet device is essential. It is becoming established as a construction method. An example of such a water jet device is disclosed in JP-A-57-58793.

This water jet processing uses high pressure (10
Since water of 0 to 3000 kgf / cm ² ) is sprayed from the spray nozzle onto the concrete for cutting and breaking, generation of noise, vibration, dust, etc. can be suppressed to a low level.
It is necessary to work while moving the injection nozzle in order to spread a large area of concrete with this water jet device, and the pipe that connects the high-pressure water generator and the injection nozzle is equipped with the injection nozzle. It is necessary to allow movement of the body.

Therefore, a method of permitting the movement of the moving body by using a flexible hose made of a thick synthetic resin that can withstand high pressure, and a method of allowing a plurality of short metal pipes to have a plurality of swivel joints (surrounding joints) There is a method in which the injection nozzle is allowed to move by connecting and disconnecting, and bending the pipe a plurality of times to expand and contract the pipe.

[0005]

In the above-mentioned high-pressure hose, the life of the hose varies greatly depending on the operating environment or product lot, so it is difficult to determine when to replace the hose, and it is necessary to replace it early for safety. Moreover, there is a problem that the life is shorter than that of the metal tube.

Further, in the above-described method of connecting the fluid supply device and the injection nozzle by using a large number of swivel joints and metal pipes, the number of parts of the swivel joint and the metal pipes increases as the moving distance of the moving body increases. It is expensive because it increases. In addition, the replacement of the sealing material at the joints is frequent, which makes maintenance troublesome. Further, there is a problem that the pressure loss increases as the number of swivel joints increases, and the ejection pressure from the ejection nozzle decreases.

An object of the present invention is to provide a metal pipe supply device capable of allowing the movement of a moving body while supplying a fluid to a jet nozzle of the moving body without using a high pressure hose or a swivel joint. Is.

[0008]

According to a first aspect of the present invention, a fluid supply device for generating high pressure water is connected to a moving body having an injection nozzle for injecting the high pressure water generated by the fluid supply device. Then, the metal pipe that guides the high-pressure water from the fluid supply means to the moving body is unrolled when the moving body moves forward, and wound up when the moving body moves backward, and In a metal pipe supply device that allows a rearward movement, a support drum and a rotation shaft, the rotation shaft being rotatably supported by the support shaft around a rotation axis, the rotation drum, and the outer periphery thereof. Along the elastic deformation range, a plurality of metal pipes wound in a bent state, a first pipe for guiding high-pressure water from the rotary shaft of the rotary drum to each metal pipe, and rotation of the rotary drum around the rotation axis. Tolerable A second pipe that guides high-pressure water from the fluid supply device to the rotary shaft of the rotary drum, and a manifold that is provided on the rotary drum and that guides the high-pressure water supplied by the first pipe to each metal pipe. It is a characteristic metal pipe supply device.

According to the present invention, the high pressure water from the fluid supply device is guided to the rotary shaft of the rotary drum by the second pipe, and is supplied from this rotary shaft to the manifold by the first pipe. A plurality of metal pipes wound around the outer periphery of the rotary drum are connected to the manifold, and the high-pressure water guided by the first pipe is distributed and supplied to the plurality of metal pipes by the manifold, and a jet nozzle of a moving body is supplied. Is jetted from. In this way, the high-pressure water is distributed to the plurality of metal pipes by the manifold on the rotating drum and supplied to the moving body, so that the flow rate of the high-pressure water supplied to the injection nozzle is secured and the pipe diameter of each metal pipe is adjusted. The radius of curvature when each metal tube is flexed to the maximum extent within the elastic deformation range can be reduced to reduce the size of the rotary drum.

A fluid supply device for supplying high-pressure water,
Since it is connected to a moving body having an injection nozzle by a metal tube, it does not have a short life like a hose, and has a stable life and can be used for a long time. As a result, the metal tube does not need to be replaced many times, so that the labor of replacement can be saved.

Further, since the movable body is allowed to move by bending the metal tube, it is not necessary to use a large number of expensive swivel joints as in the prior art. Furthermore, since the number of joints is reduced, maintenance work such as replacement of the sealing material is reduced and the burden on the operator is reduced.

[0012]

[0013]

[0014]

According to a second aspect of the present invention, there is provided a winding means for applying a rotational force to the rotary drum in a direction for winding the metal tube.

According to the present invention, since the rotating drum is provided with a rotating force in the direction of winding the metal tube, when the moving body retracts, the metal tube is reliably wound around the rotating drum. When the moving body moves forward against the force of rotating the rotating drum of the winding means, the metal tube is unwound from the rotating drum. In this way, the winding and unwinding of the metal tube can be reliably performed.

According to a third aspect of the present invention, the rotary shaft of the rotary drum is provided with a swivel joint that rotatably connects the first pipe and the second pipe around the rotation axis of the rotary drum. Is characterized by.

According to the invention, the first pipe and the second pipe are connected to the first pipe via a swivel joint. As a result, the rotation of the rotary drum can be allowed, and the fluid can be reliably supplied to the metal pipe via the first pipe.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a water jet device 3 equipped with a metal pipe supply device 1 according to an embodiment of the present invention.
FIG. The water jet device 3 includes a metal pipe supply device 1, a jet nozzle, a moving body 2 that moves forward A1 (right side in FIG. 1) and rearward A2 (left side in FIG. 1), and a source of high-pressure water. The fluid supply device 5 is High-pressure water is supplied to the jet nozzle of the moving body 2 from the fluid supply device 5 via the metal pipe supply device 1. The moving body 2 sprays high-pressure water onto concrete or the like from a spray nozzle to perform a hanging operation while moving back and forth on, for example, a road or a tunnel.

The metal pipe supply device 1 has a rotary drum 10, and in order to allow the movement of the moving body 2 which moves back and forth,
It is a device that winds and unwinds the metal tube 6.
The metal pipe supply device 1 is connected to the rotary drum 10 and the injection nozzles of the moving body 2, and is a plurality of metal pipes 6a to 6j (ten in the present embodiment) that are wound around the rotary drum 10 (hereinafter, collectively referred to as “metal pipes”). May omit the subscripts a to j), the first pipe 7, the second pipe 9 and the swivel joint 8 that connect the metal pipe 6 and the fluid supply device 5, and the metal pipe 6 is wound around the rotary drum 10. It comprises a winding means 14 for rotating in the direction B2 and a guide rail 17 for guiding the metal tube 6 back and forth.

The high-pressure water jetted from the jet nozzle of the moving body 2 first flows into the second pipe 9 from the fluid supply device 5, and then flows into the first pipe 7 from the second pipe 9 through the swivel joint 8. , Are distributed to the metal pipes 6a to 6j from the first pipe 7 through the manifold 11, and are supplied to the injection nozzles from the metal pipes 6a to 6j. The first pipe 7 and the second pipe 9 are connected by a swivel joint 8 which is a swivel joint, and the first pipe 7 is rotatable with respect to the second pipe 9.

The rotary drum 10 has a boss 39 which is the center of rotation of the rotary drum 10, six spokes 24a to 24f attached to the boss 39 and extending in the radial direction, and an annular shape supported by the spokes 24a to 24f. And the rim 23.

The winding means 14 includes a support frame 22 standing upright on the rear side of the rotary drum 10, a pulley 21 arranged at the upper end of the support frame 22, and a wire 19 wound from the rotary drum 10 over the pulley 21. , A weight 20 suspended by a wire 19 in a support frame 22. Further, the inner peripheral wall 56 of the rim 23 of the rotary drum 10 is provided with a protruding portion 25 that protrudes inward in the radial direction.
One end of the rotary drum 1 is attached to the protrusion 25.
The boss 39, which is the center of rotation of 0, is wound multiple times and the other end is connected to the weight 20. Therefore, a winding force acts on the rotary drum 10 in the arrow B2 (counterclockwise direction in FIG. 1) direction, that is, in the direction in which the metal tube 6 is wound by the dead weight of the weight 20.

Therefore, when the moving body 2 moves forward A1 against the winding force of the winding means 14, the metal tube 6 is unwound from the rotary drum 10, and the rotary drum 10 moves along the rotation axis L1 which is the center of rotation. It rotates in the direction of arrow B1 (clockwise in FIG. 1) as the center. The wire 19 is wound around the boss 39 of the rotary drum 10, and the weight 20 is pulled up in the support frame 22. When the moving body 2 moves backward A2, the rotating drum 10 rotates in the direction of arrow B2 (counterclockwise in FIG. 1) about the axis L1 by the winding force of the winding means 14, and the metal tube 6 rotates the rotating drum. 1
It is wound up to 0.

As shown in FIG. 1, the guide rail 17 extends from above the rotary drum 10 to the front A1 and is supported by two support columns 15 and 16. At the rear end of the guide rail 17, metal pipes 6a to 6j from the bottom wall of the guide rail 17 are provided.
When the height is higher than a predetermined height, metal pipe lifting abnormality detection sensors 85a and 85b for detecting the height are provided. A support member 87 protruding forward is provided on the support frame 22 behind the rotary drum 10.
7 is provided with a metal pipe winding abnormality detection sensor 86 that detects when the separation distance between the inner peripheral wall 56 of the rim 23 and the metal pipes 6a to 6j becomes a predetermined distance or more.
Based on the detection results of these sensors 85a, 85b, 86, control is performed to sound an alarm or stop the movement of the moving body 2, thereby reliably preventing abnormal winding of the metal tubes 6a to 6j. be able to.

Next, the rotary shaft 18 will be described with reference to FIG. The rotating shaft 18 has a stepped columnar shape extending in the direction of the axis L <b> 1, and includes a large diameter portion 60 axially supported by the upper end of the support column 26 and a small diameter portion 61 inserted into the boss 39 of the rotating drum 10. . The rotary shaft 18 is arranged coaxially with the rotary axis L1 of the rotary drum 10, and the large diameter portion 60 is provided at the upper end of the support column 26 by a pair of bearings 27a and 27b.
It is rotatably supported around. Further, the small diameter portion 61 projecting to one side in the direction of the axis L1 (right side in FIG. 2) is fitted into the boss 39 described above and coupled by the key 40.
In this way, the rotary drum 10 is rotatably supported by the column 26.

The rotary shaft 18 has a hollow portion 41 penetrating along the axis L1, and the connecting pipe 28 is inserted into the hollow portion 41 coaxially with the axis L1. One end (the left side in FIG. 2) of the connecting pipe 28 is connected to the second pipe 9, and the other end is connected to the first pipe 7 via the swivel joint 8. The first pipe 7, the second pipe 9 and the connecting pipe 28 have an outer diameter of 24 m.
It is a stainless steel tube having a diameter of m and an inner diameter of 8 mm.

Referring to FIG. 1, one end of the second pipe 9 is connected to the fluid supply device 5, and the other end thereof is connected to the connecting pipe 28 and fixed. On the other hand, the first pipe 7 extends radially outward from the central axis L1 of the rotary drum 10, the other end is connected to the connecting pipe 28 via the swivel joint 8, and the one end is connected to the rotary drum 10. It is connected to the manifold 11 attached to the rim 23 and fixed to the rotating drum 10. In this way, the first tube 7 rotates with the rotation of the rotary drum 10 and can rotate with respect to the second tube 9.

Next, the manifold 11 will be described with reference to FIGS. 3, 4 and 5. Figure 3 shows the manifold 1
1 is a plan view of FIG. 1, FIG. 4 is a sectional view taken along the section line IV-IV of FIG. 3, and FIG. 5 is a front view of the manifold 11. The metal tubes 6a to 6j have an inner diameter of 2 mm and an outer diameter of 1
It consists of a 0 mm, 15 mm long stainless tube, the outer surface of which is protected by a flexible cover. One ends of the metal pipes 6 a to 6 j are connected to the manifold 11 by a union joint 55. High-pressure water having a pressure of about 1000 to 3000 kgf / cm ² is supplied to the metal tubes 6a to 6j.

The manifold 11 protrudes from the bottom surface of the manifold main body 62 and the manifold main body 62 for distributing the high pressure water flowing from the first pipe 7, and the inner peripheral wall 5 of the rim 23.
A short columnar projection 63 penetrating 6 and to which one end of the first pipe 7 is attached, and a connection pipe 89 connected to the front side of the manifold main body 62 and connected to one end of the metal pipes 6a to 6j.
a to 89j. The manifold 11 is supported by a support wall 69 provided upright on the rim 23, and
3 are fixed to both side walls in the width direction (vertical direction in FIG. 3) with bolts.

An insertion hole 49 is formed from the projection 63 into which the first pipe 7 is inserted to the inside of the manifold main body 62.
A first distribution hole 64 extending upward is connected to the insertion hole 49, and second and third distribution holes 65 and 66 extending on both sides in the width direction (left and right direction in FIG. 5) are connected to the first distribution hole 64. A connection pipe 89 is provided in the second and third distribution holes 65 and 66.
Insertion ports 67a to 67j into which one ends of a to 89j are inserted
Are lined up. One end of each of the connection pipes 89a to 89j has an insertion port 6
7a to 67j, and the other end is connected to the metal pipes 6a to 6j by a union joint 55.

As described above, the first pipe 7 and each metal pipe 6a ...
6j are connected by the manifold 11, so that the high-pressure water sent out from the first pipe 7 is first fed to the first distribution pipe 64.
Flow into the second and third distribution pipes 6 from the first distribution pipe 64.
5, 66, and the second and third distribution pipes 6
5, 66 are distributed to the metal tubes 6a to 6j. Further, in the vicinity of the union joint 55 described above, the two clamps 58a and 58b make the metal pipes 6a to 6j and the connecting pipes 89a to 89j substantially even over the entire length in the width direction of the rim 23 (vertical direction in FIG. 3). Hold at a distance.

Next, the clamp 58 will be described with reference to FIGS. 3, 4 and 6. FIG. 6 shows the section line V of FIG.
It is sectional drawing seen from I-VI. As shown in FIG. 6, the clamps 58 are substantially evenly spaced in the longitudinal direction (the left-right direction in FIG. 6), and have the metal pipes 6a to 6j or the connecting pipes 89a to 8a.
It has holding holes 73a to 73j for inserting and holding 9j.

As shown in FIGS. 3 and 4, the clamp 5
8a and 58b are arranged to face each other with the union joint 55 in between. Each of the clamps 58a, 58b has two columns 77a, which are erected radially outward from the inner peripheral wall 56 of the rim 23.
The 77b is fitted between the mounting pieces 75a and 75b, and is pin-coupled with the pin 79 and fixed to the rim 23.

Clamp 58 mounted as described above
The metal pipes 6a to 6 are provided in the holding holes 73a to 73j of a and 58b.
j and the connecting pipes 89a to 89j are held, and each metal pipe 6
Since the a to 6j and the connecting pipes 89a to 89j are arranged at substantially uniform intervals over the entire length of the rim 23 in the width direction (vertical direction in FIG. 3), the metal pipes 6a are arranged on the inner peripheral wall 56 of the rim 23. The ~ 6j are surely wound without overlapping each other.

Next, the moving body 2 will be described with reference to FIG. FIG. 7 is a plan view of the moving body 2. Mobile unit 2
A dolly 90 that travels forward A1 and backward A2 along the guide rail 17, and an arm-type robot 91 that is mounted on the dolly 90 and has an injection nozzle that injects high-pressure water attached to the wrist.
And the other ends of the metal tubes 6a to 6j are connected to each other, and the robot 9
A manifold 81 for supplying high-pressure water to one injection nozzle. Similar to the manifold 11 described above, the manifold 81 includes a manifold main body 62 and connection pipes 89a to 89j to which the other ends of the metal pipes 6a to 6j are connected via the union joint 55. One end of the high pressure hose connected to the injection nozzle of the robot 91 is connected to the connection port 93 of the manifold body 62.

The high-pressure water sent from each of the metal pipes 6a to 6j is collected by the manifold 81 and connected to the connection port 93.
And is supplied to the injection nozzle of the robot 91 via a high pressure hose. Then, high-pressure water is sprayed from the spray holes of this spray nozzle onto the workpiece, such as concrete.

A pair of rollers 83a and 83b are attached to both longitudinal ends (vertical direction in FIG. 7) of a clamp 58e which holds the other ends of the metal tubes 6a to 6j. Drive on the guide rail 17.

The high-pressure water sent from the fluid supply device 5 is first distributed by the manifold 11 of the rotary drum 10 to a plurality of (10 in this embodiment) metal pipes 6a to 6j, and from these metal pipes 6a to 6j. The high-pressure water sent is collected again by the manifold 81, and then the robot 9
No. 1 injection nozzle.

In this way, the high-pressure water is supplied to the jet nozzle of the moving body 2, and the moving body 2 moves in the front-back direction A.
Move to 1, A2. When the moving body 2 moves to the rear A2, the metal tubes 6a to 6j are bent within the elastic deformation range and are wound around the rotating drum 10. However, when the outer diameter of the metal tube 6 is increased, the metal tubes 6a to 6j are less likely to be bent, and thus the outer diameter of the outer diameter is reduced. Winding the large metal tube 6 around the rotary drum 10 requires an extremely large force. For this purpose, the weight of the weight of the winding means 14, the traveling driving force of the moving body 2 that moves against the winding means 14 and the rigidity of the rotary drum 10 must be increased. On the other hand, in the present embodiment, as described above, the number of the metal tubes 6 to be wound is 10 so that the flow rate of the high-pressure water supplied to the jet nozzle of the robot 91 can be ensured and the metal tubes 6a to 6j can be secured. The outer diameter of can be reduced. With this, each metal tube 6a can be securely applied with a small force.
~ 6j can be wound around the rotating drum 10. Further, if the outer diameters of the metal pipes 6a to 6j are reduced, the metal pipes 6a to 6j are reduced.
The radius of curvature when the a to 6j are flexed to the maximum within the elastic deformation range becomes small, and the rotating drum 10 can be made small. As a result, downsizing of the metal pipe supply device 1 of the present invention can be realized.

Further, since the metal tubes 6a to 6j are wound around the circular rotary drum 10, the radius of curvature R of the winding portion of the metal tubes 6a to 6j becomes constant. As a result, a constant bending stress S determined by the radius of curvature R and the section modulus Z is uniformly generated in the winding portion, so that local stress is generated and the metal tubes 6a to 6j are plastically deformed or broken. It can be prevented.

The value of the diameter D1 of the rotary drum 10 is
It is selected so that bending stress below the elastic limit is generated in the metal tube 6, and is determined by the bending applied to the metal tube 6 and the section modulus Z and Young's modulus E of the metal tube 6. In this embodiment, the metal tubes 6a to 6j having an inner diameter of 2 mm and an outer diameter of 10 mm are used.
The diameter D1 of the rotary drum 10 is selected so as to have the minimum diameter that allows the winding of the resin in the elastic deformation range, and the diameter D1 is 3 m.

As described above, the diameter D1 of the rotating drum 10
From the value of the bending stress S acting on the metal pipe 6 and the stress-repetition number curve (SN diagram) of the metal pipe 6, the fatigue life of the metal pipe 6 can be accurately predicted. For example, when the bending stress S1 = 200 ksi, the metal tube 6 has N1 =
It can be bent 200 times. That is, the metal tube 6 can be wound and unwound 200 times. When the bending stress S2 = 40 ksi, the metal pipe 6
Can be bent N2 = 100,000 times. That is, when the bending stress generated in the metal tube 6 is 40 ksi, the metal tube can be unwound and wound 100,000 times. In this way, the fatigue life of the metal pipe 6 can be accurately calculated, and thus the metal pipe can be prevented from breaking. Conversely, the fatigue life of the metal tube can be set by the diameter D1 of the rotary drum 10. That is, when the diameter D1 of the rotary drum 10 is increased, the bending stress S is decreased and the fatigue life of the metal tube 6 can be extended.

The weight W1 of the weight depends on the frictional resistance F1 of the roller 83 with respect to the guide rail 17, the frictional force F2 between the rotating shaft 18 and the bearing 27, and the rotating portion 37 of the swivel joint 8 and the bearing 27. The frictional force F3 and the penetrating torque T1 of the rotary drum 10 are selected to be larger than the total (W
2> F1 + F2 + F3 + T1). As a result, the winding means 14 can reliably rotate the rotary drum 10 in the winding direction B2 when the moving body 2 retracts, and the metal tubes 6a to 6j reliably wind the rotary drum 10.

The metal pipe supply apparatus 1 of the present invention is not limited to use for supplying high-pressure water, but may be used when the working environment is high and the hose cannot be used.

As another embodiment of the present invention, a metal tube made of copper or iron may be used instead of the stainless metal tube 6.

The movement of the moving body 2 is not limited to the structure in which the metal tube 6 is wound around the rotary drum 10, and the metal tube is bent within a predetermined elastic deformation range by using, for example, a cable bear (registered trademark). It may be configured to allow.

[0048]

According to the first aspect of the present invention, since the high pressure water is distributed to the plurality of metal pipes by the manifold on the rotating drum and supplied to the moving body, the flow rate of the high pressure water supplied to the injection nozzle is increased. It is possible to reduce the radius of curvature of each metal tube and to reduce the radius of curvature when each metal tube is flexed to the maximum extent within the elastic deformation range.

A fluid supply device for supplying high-pressure water,
Since it is connected to a moving body having an injection nozzle by a metal tube, it does not have a short life like a hose, and has a stable life and can be used for a long time. As a result, the metal tube does not need to be replaced many times, so that the labor of replacement can be saved.

Further, since the metal tube is bent to allow the movement of the moving body, it is not necessary to use a large number of expensive swivel joints as in the prior art. Furthermore, since the number of joints is reduced, maintenance work such as replacement of the sealing material is reduced and the burden on the operator is reduced.

[0051]

[0052]

According to the second aspect of the present invention, since the rotating drum is provided with the rotating force in the direction of winding the metal tube, when the moving body retracts, the metal tube is reliably wound around the rotating drum. To be When the moving body moves forward against the force of rotating the rotating drum of the winding means, the metal tube is unwound from the rotating drum. In this way, the winding and unwinding of the metal tube can be reliably performed.

According to the present invention as set forth in claim 3, since the first pipe is connected to the second pipe through the swivel joint, the rotation of the rotary drum is allowed, and the second pipe passes through the first pipe. High pressure water can be reliably supplied to the metal pipe.

[Brief description of drawings]

FIG. 1 is a metal pipe supply device 1 according to an embodiment of the present invention.
It is a front view which shows the water jet apparatus 3 provided with.

FIG. 2 is a sectional view of a rotary shaft 18.

3 is a plan view of the manifold 11. FIG.

4 is a cross-sectional view taken along the section line IV-IV in FIG.

5 is a front view of the manifold 11. FIG.

6 is a cross-sectional view taken along the section line VI-VI in FIG.

7 is a top view of the moving body 2. FIG.

[Explanation of symbols]

1 Metal tube feeder 2 moving body 3 Water jet device 5 Fluid supply device 6 metal tubes 7 First pipe 8 swivel joint 9 Second pipe 10 rotating drums 14 Winding means 18 rotation axis 19 wires 20 weights 21 Pulley 22 Support frame 28 Connection pipe 58 tube clamp

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mutsuhiro Nakazawa 3-1, 1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Kobe factory (56) Reference JP-A-56-95600 (JP, 56-95600) A) Actual Development Sho 56-49400 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B26F 3/00

Claims (3)

(57) [Claims] 1. A fluid supply device that generates high-pressure water and a moving body that includes an injection nozzle that injects the high-pressure water generated by the fluid supply device are connected to each other, and the high-pressure water from the fluid supply means is connected to the moving body. In a metal pipe supply device that unwinds a metal pipe that guides to when the moving body moves forward, and winds up when the moving body moves backward, allowing the moving body to move forward and backward. A supporting drum and a rotating drum, which has a rotating shaft, the rotating shaft being rotatably supported by the supporting rod around the rotation axis, and wound around the rotating drum along its outer periphery within a range of elastic deformation. A plurality of metal pipes to be taken, a first pipe that guides high-pressure water from the rotary shaft of the rotary drum to each metal pipe, and a rotation of the rotary drum around the rotation axis, allowing the high-pressure water from the fluid supply device to rotate. Do Second directing the beam axis of rotation
A metal pipe supply device comprising: a pipe; and a manifold provided on a rotary drum, which distributes and guides high-pressure water supplied by the first pipe to each metal pipe. 2. The metal pipe supply device according to claim 1, further comprising winding means for applying a rotational force to the rotary drum in a direction of winding the metal pipe. 3. The rotary shaft of the rotary drum has the first
The metal pipe supply device according to claim 1 or 2, further comprising a swivel joint that rotatably connects the pipe and the second pipe around the rotation axis of the rotary drum.