A pipe winding machine

Abstract

A pipe winding machine comprises a base, a pipe winding disc mounted on a central rotating shaft and having a load bearing wall circumferentially surrounding the outer periphery of the central rotating shaft, the load bearing wall being used for circumferentially winding a pipe thereon, and a pipe feeding device. The pipe winding machine further comprises a support column extending obliquely upward from the base and in an oblique direction rearward, and a support arm extending forward from the position where the lower end of the support column of the base is located, and the front end of the support arm is provided with a through hole extending in a front-rear direction for the pipe to pass through. The pipe winding disc is arranged on the support column in a manner capable of rotating about the left-right extending central rotating shaft. The pipe feeding device is arranged on the support arm and located at a position behind the through hole to drive the pipe to move forward. Compared with the prior art, the pipe winding machine has a compact and stable structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heat exchange pipe winding, and particularly relates to a pipe winding machine. BACKGROUND

[0002] The existing pipe winding machine, such as the invention patent No. 201410663041.9, "A pipe winding machine" (authorized announcement No. CN104444563B), discloses a structure, which includes a supporting wheel for carrying a pipe to be wound, a pipe feeding device and a pipe unwinding device. The pipe feeding device includes, from bottom to top, a pipe feeding base, a lifting mechanism, a fine adjustment mechanism, a supporting seat, a radial adjustment mechanism and the supporting wheel. The pipe unwinding device includes a pipe unwinding base, which is provided with a bottom disc, a support, an axial clamping mechanism, a radial clamping mechanism, an expansion sleeve, a shrinkage prevention mechanism and various sensors and control systems. The invention patent realizes pipe winding through the cooperation of the pipe feeding device and the pipe unwinding device.

[0003] For example, the utility model patent No. 201721735342.3, "A pipe winding equipment for winding heat exchange pipes of a pipe winding type heat exchanger" (authorized announcement No. CN208467092U), discloses a structure, which includes a floor lathe, the floor lathe including a chuck, a tailstock and a tool holder, the tool holder being provided with a pressing mechanism for pressing the heat exchange pipe; the structure further includes a supporting core for the pipe to be wound, the supporting core being clamped between the chuck and the tailstock; the chuck drives the supporting core to rotate, and when the tool holder moves close to or away from the chuck, the heat exchange pipe can be gradually spirally wound on the supporting core under the action of the pressing mechanism; the structure further includes a traveling trolley for placing the wound heat exchange pipe, the traveling trolley including a bottom plate, the bottom plate being provided with rollers at the bottom and two vertical rods at the top, and a horizontal rod being detachably assembled between the two vertical rods. In this way, the pipe winding is realized through the cooperation of the traveling trolley and the pressing mechanism.

[0004] The above-mentioned patents need to cooperate with at least two devices to realize pipe winding, and the compactness of the structure needs to be further improved. SUMMARY

[0005] The first technical problem to be solved by the present application is to provide a pipe winding machine with compact and stable structure in view of the current situation of the prior art.

[0006] The second technical problem to be solved by the present application is to provide a pipe winding machine capable of adjusting the pipe feeding angle.

[0007] The third technical problem to be solved by the present application is to provide a pipe winding machine, so that the fed pipe can be closely wound on the core.

[0008] The technical solution adopted by the present application to solve the above-mentioned technical problems is as follows: a pipe winding machine, comprising:

[0009] the base;

[0010] a pipe winding disc, which is installed on the central rotating shaft and has a load bearing wall that circumferentially surrounds the outer periphery of the central rotating shaft, the load bearing wall being used for circumferentially winding a pipe thereon;

[0011] a pipe feeding device;

[0012] characterized in that it further comprises:

[0013] a support column, which extends obliquely upward from the base and is obliquely directed rearward;

[0014] a support arm, which extends forward from the position where the lower end of the support column of the base is located, and the front end of the support arm is provided with a through hole that penetrates frontward and rearward, so as to allow the pipe to pass through;

[0015] the pipe winding disc is arranged on the support column in a manner that it can rotate around the aforementioned central rotating shaft that extends leftward and rightward;

[0016] the pipe feeding device is arranged on the support arm and located at the position behind the through hole, so as to drive the pipe to move forward.

[0017] In this way, the obliquely rearward directed support column and the forwardly extending support arm are arranged in a V shape on the base, the pipe winding disc is arranged on the support column, and the pipe feeding device is arranged on the support arm, so that the force acting on the base is more uniform, and the overall structure is more stable; and the pipe winding disc and the pipe feeding device are arranged on the same base through the support column and the support arm, so that the structure is more compact; when in use, the pipe on the pipe winding disc moves forward under the action of the pipe feeding device, passes through the through hole at the front end of the support arm, and is then wound on the core of the heat exchanger, so as to realize pipe winding.

[0018] In order to be able to adjust the pipe winding angle, preferably, the base comprises a body and a rotating disc, the rotating disc is arranged in the center of the body in a manner that it can rotate around the vertical axis that extends upwardly, and the lower end of the support column and the rear end of the support arm are both arranged on the upper surface of the rotating disc.

[0019] The pipe winding machine further comprises a first power member, the output end of the first power member acts on the rotating disc to drive the rotating disc to rotate.

[0020] The V-shaped arrangement of the support column and the support arm in the present application makes the size of the rotating disc not need to be too large, thereby making the design space of the size of the base larger. When the rotating disc rotates, the V-shaped arrangement of the support column and the support arm can stably rotate together with the rotating disc.

[0021] Preferably, the bottom of the body is provided with a walking wheel, and a second power member is arranged to drive the walking wheel to rotate.

[0022] In order to further solve the second technical problem mentioned above, preferably, the rear end of the support arm is arranged on the base in a manner that it can rotate up and down around a first axis extending left and right.

[0023] Preferably, the support arm comprises:

[0024] A first rotating arm, one end of which is provided on the base in a manner capable of rotating up and down around the first axis, and the other end of which is a first free end extending forward;

[0025] The second rotating arm has a first end which is mounted on the first free end of the first rotating arm so as to be rotatable up and down about a second axis extending in the left-right direction, and a second end which is a second free end extending forward and having the above-mentioned through hole;

[0026] The pipe winding machine also includes:

[0027] A driving mechanism, wherein an output end of the driving mechanism acts on the first rotating arm to drive the first rotating arm to rotate up and down;

[0028] The output end of the rotating mechanism acts on the second rotating arm to drive the second rotating arm to rotate up and down.

[0029] In this way, when the pipe delivery angle needs to be adjusted, the first rotating arm can be rotated first to adjust the overall angle of the first rotating arm and the second rotating arm, and then the second rotating arm can be rotated for fine-tuning so that the pipe delivery angle meets the pipe winding requirements. In other words, the present invention can adjust the pipe delivery angle more accurately through two-stage adjustment.

[0030] Preferably, the first rotating arm and the second rotating arm have a first state in which they are arranged in a straight line and a second state in which they are arranged at an obtuse angle.

[0031] Preferably, the length of the first rotating arm is smaller than that of the second rotating arm, so that the whole is more stable when delivering the pipe.

[0032] To adjust the angle of the second rotating arm, the rotating mechanism further includes a turbine mounted on the first free end of the first rotating arm via a rotating shaft extending left and right, a worm gear meshing with the turbine, and a handwheel that drives the worm gear. The first end of the second rotating arm is constrained to the turbine, allowing the second rotating arm to rotate with the turbine. Thus, the second rotating arm can be driven to rotate by turning the handwheel, making operation easier.

[0033] In the above solutions, preferably, the pipe delivery device includes:

[0034] a base, provided on the second rotating arm;

[0035] a pipe delivery wheel having a central axis extending leftward and rightward and an annular wall circumferentially surrounding the central axis, the pipe delivery wheel being rotatably mounted on a base about the central axis, the annular wall being configured to support the pipe extending forward and backward;

[0036] The power mechanism is used for driving the pipe to move forward and pass through the through hole of the second rotating arm.

[0037] To further solve the third technical problem mentioned above, preferably, the pipe delivery device also includes a damping assembly, which is arranged on the base and in front of the pipe delivery wheel, and is provided with a channel for the pipe to pass through, and the damping device is arranged to generate a damping force when the pipe passes through the channel to limit the forward movement of the pipe.

[0038] In this way, during the pipe winding operation, the pipe moving forward is subjected to the damping force generated by the damping assembly, and tends to be tightened backward, so that the wound pipe can be tightly wound on the core.

[0039] Preferably, the damping component includes:

[0040] The roller has a central axis extending left and right and a peripheral wall surrounding the central axis. The rollers are two and are disposed one above and one below on either side of the tube so as to be rotatable about their respective central axes. The peripheral walls of the two rollers face each other to form the above-mentioned channel.

[0041] The damping member acts on at least one of the rollers to limit the roller from rotating as the pipe moves.

[0042] Preferably, the damping element is a magnetic powder clutch.

[0043] Furthermore, the first end of the second rotating arm is provided with an extension arm extending leftward and rightward, and the base of the pipe delivery device is provided on the extension arm in a manner capable of moving leftward and rightward;

[0044] The second end of the second rotating arm is provided with a perforated seat with the above-mentioned perforation which can move left and right.

[0045] Furthermore, the pipe delivery device has at least two groups, which are arranged on the extension arm at intervals along the left and right directions;

[0046] The number of perforated seats with perforations on the second end of the second rotating arm matches the number of pipe feeding devices and is spaced apart in the left-right direction. Thus, at least two pipes can be passed through their respective pipe feeding devices and perforated before being wound onto the core body. Furthermore, the spacing between the groups of pipe feeding devices and the spacing between the perforations can be adjusted based on the pipe winding interval.

[0047] Compared with the prior art, the advantages of the present invention are: the support column inclined backward and the support arm extending forward are arranged in a V shape on the base, the pipe winding disk is arranged on the support column, and the pipe delivery device is arranged on the support arm, so that the base is subjected to more uniform force and the overall structure is more stable; and the pipe winding disk and the pipe delivery device are arranged on the same base through the support column and the support arm, and the structure is more compact; when in use, the pipes on the pipe winding disk move forward under the action of the pipe delivery device and pass through the perforation at the front end of the support arm, and are then coiled onto the heat exchanger core to achieve pipe winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Schematic diagram of the structure of a tube winding machine according to an embodiment of the present invention;

[0049] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0050] Figure 3 This is a structural schematic diagram of the tube winding machine according to an embodiment of the present invention from another perspective;

[0051] Figure 4 This is a structural schematic diagram of the tube winding machine according to another embodiment of the present invention;

[0052] Figure 5 A cross-sectional view of a tube winding machine according to an embodiment of the present invention;

[0053] Figure 6 Schematic diagram of the structure of the damping assembly according to an embodiment of the present invention;

[0054] Figure 7 4 is a cross-sectional view of a damping assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0056] like Figures 1 to 7 1 is a preferred embodiment of a pipe winding machine according to the present invention. The pipe winding machine includes a pipe feeding device 100 , a base 200 , a support arm 300 , a pipe winding disc 400 and a support column 600 .

[0057] Among them, the base 200 includes a main body 210 and a turntable 220. The bottom of the main body 210 is provided with a walking wheel 211, and a second power member for driving the walking wheel 211 to rotate. The turntable 220 is arranged in the center of the main body 210 in a manner that it can rotate around its own vertically extending axis. A first power member 230 is also provided, and its output end acts on the turntable 220 to drive the turntable 220 to rotate. The first power member 230 here can use a motor to drive the turntable 220 to rotate after deceleration through a conventional reduction mechanism such as a gear set. Similarly, the second power member can use a conventional walking motor. Since these are all existing power members, they will not be described in detail here.

[0058] The support column 600 is disposed on the turntable 220 and extends upwardly and obliquely from the turntable 220 , with the oblique direction being backward.

[0059] The pipe winding reel 400 is mounted on a central shaft 410 and has a support wall 420 circumferentially surrounding the central shaft 410. The support wall 420 is used to wrap the pipe 500 circumferentially around it. The pipe winding reel 400 is mounted on the upper end of the support column 600 so that it can rotate about the central shaft 410, which extends horizontally.

[0060] The support arm 300 is mounted on the turntable 220 and extends forward from the lower end of the support column 600 of the turntable 220. A through-hole 321 is provided at the front end of the support arm 300, extending forward and backward for the tube 500 to pass through. The rear end of the support arm 300 is mounted on the turntable 220 so that it can rotate vertically about a first axis L1 extending horizontally. In this embodiment, the support arm 300 includes a first rotating arm 310 and a second rotating arm 320. One end of the first rotating arm 310 is mounted on the turntable 220 so that it can rotate vertically about the first axis L1, and the other end is a first free end extending forward. The first end of the second rotating arm 320 is mounted on the first free end of the first rotating arm 310 so that it can rotate vertically about a second axis L2 extending horizontally. The second end is a second free end extending forward and provided with the through-hole 321. The first rotating arm 310 and the second rotating arm 320 can be arranged in a straight line in a first state and at an obtuse angle in a second state. The specific state is adjusted according to the desired pipe delivery angle. Furthermore, the length of the first rotating arm 310 is shorter than that of the second rotating arm 320, which stabilizes the overall structure. This design also ensures that when adjusting the same angle, the longer second rotating arm 320 allows for a greater adjustment range for the perforation on its free end, making it easier to meet adjustment requirements.

[0061] like Figure 5As shown, in order to drive the rotation of the first rotating arm 310 and the second rotating arm 320, a driving mechanism 330 and a rotating mechanism 340 are further provided. The driving mechanism 330 can be a conventional electric cylinder or hydraulic cylinder, etc., and its output end acts on the first rotating arm 310 to drive the first rotating arm 310 to rotate up and down. The rotating mechanism 340 includes a turbine 342 mounted on the first free end of the first rotating arm 310 via a rotating shaft 341 extending left and right, a worm 343 meshing with the turbine 342, and a handwheel 344 for driving the worm 343 to rotate. The first end of the second rotating arm 320 is constrained to the turbine 342, allowing the second rotating arm 320 to rotate along with the turbine 342. Thus, the first rotating arm 310 can be driven to rotate by the driving mechanism 330 (the second rotating arm 320 rotates along with the first rotating arm 310), and the second rotating arm 320 can be driven to rotate independently by turning the hand wheel 344, which is convenient for operation. Moreover, the installation of this turbine and worm gear transmission method in this position can meet the requirements of miniaturization and lightness, while also having the characteristics of high transmission precision and good transmission efficiency. Of course, it will be understood by those skilled in the art that the above-mentioned driving mechanism 330 can also be designed as a turbine and worm gear; and the rotating mechanism 340 can also be driven by an electric cylinder or a hydraulic cylinder.

[0062] To improve pipe winding efficiency, a perforated seat 360 with the aforementioned perforations 321 is provided at the second end of the second rotating arm 320, capable of left and right movement. Two perforated seats 360 are provided, one on the left and one on the right (i.e., two pipes can be wound simultaneously. Of course, additional perforated seats 360 with perforations 321 can be provided if necessary). The first end of the second rotating arm 320 is provided with extension arms 350 extending left and right. The number of pipe delivery devices 100 matches the number of perforated seats 360 with perforations. In other words, in this embodiment, two sets of pipe delivery devices 100 are also provided, one on the left and one on the right, spaced apart, to drive the corresponding pipe 500 forward.

[0063] Each set of pipe feeding devices 100 includes a base 110 , a pipe feeding wheel 120 , a power mechanism 130 , a damping assembly 140 , a second telescopic power member 150 and a straightening assembly 160 .

[0064] The base 110 is mounted on the extension arm 350 in a manner that allows it to move leftward and rightward.

[0065] The pipe delivery wheels 120 have a central axis extending horizontally and a ring wall 121 circumferentially surrounding the central axis. The pipe delivery wheels 120 are mounted on the base 110 so as to be rotatable about their central axis. The ring wall 121 is used to support the aforementioned pipe 500 extending forward and backward. In this embodiment, there are two sets of pipe delivery wheels 120, positioned opposite each other on the upper and lower sides of the pipe 500. The ring walls 121 of the two sets of pipe delivery wheels 120 face each other, forming a gap for the pipe 500 to pass through. The power mechanism 130 (e.g., a conventional mechanism such as a motor) acts on the first set of pipe delivery wheels located above the pipe to rotate, thereby driving the pipe 500 forward and through the through-hole 321 of the second rotating arm 320. The second set of pipe delivery wheels located below the pipe serves as a driven wheel that rotates with the movement of the pipe 500. The output end of the second telescopic power member 150 acts on the first set of pipe delivery wheels to drive the first set of pipe delivery wheels to move closer to or away from the second set of pipe delivery wheels. Before the pipe winding process begins, the first set of pipe feeding wheels can be driven to move relatively away from the second set of pipe feeding wheels. Then, the pipe can be passed between the two pipe feeding wheels, and the first set of pipe feeding wheels can be driven to move relatively close to the second set of pipe feeding wheels. This is convenient for operation. By adjusting the distance between the two sets of pipe feeding wheels, the external force exerted by the pipe feeding wheels on the pipe 500 can be adjusted to better drive the pipe 500 to move. For details, please refer to Figure 2 、 3 .

[0066] like Figure 2 、 3 As shown in Figures 6 and 7, the damping assembly 140 is disposed on the base 110, in front of the tube-feeding wheel 120, and is provided with a passage 141 through which the tube 500 passes. The damping assembly 140 is configured to generate a damping force when the tube 500 passes through the passage, thereby limiting the forward movement of the tube 500. In this embodiment, the damping assembly 140 includes a roller 142 and a damping member 144. The roller 142 has a central axis extending left and right and a peripheral wall 143 surrounding the central axis. Two rollers 142 are disposed on either side of the tube 500, one above and one below, so as to be rotatable about their respective central axes. The peripheral walls 143 of the two rollers 142 face each other, forming the passage 141. The damping member 144 is preferably a magnetic powder clutch (although other existing damping structures may also be used). The damping member 144 acts on the roller 142 located below the tube 500 to limit the roller 142 from rotating with the movement of the tube 500.

[0067] The straightening assembly 160 is located on the base 110, behind the tube feed wheel 120, and has a straightening hole 161 for the tube 500 to pass through. There are two straightening assemblies 160, one in front and one in the back. The straightening assemblies 160 in this embodiment are of existing design and will not be described in detail here.

[0068] In this embodiment, the two sets of pipe delivery devices 100 have the same structure and are symmetrically arranged with the axis extending forward and backward as the center. Figure 3 In order to show an enlarged portion of the power mechanism 130 and the second telescopic power member 150 , the outer shell provided on the outside of the power mechanism 130 and the second telescopic power member 150 is omitted.

[0069] During pipe winding, the pipe 500 output from the pipe winding reel 400 passes through the straightening assembly 160, the pipe feeding wheel 120, the damping assembly 140, and the through-hole 321 on the second rotating arm 320 in sequence before being wound onto the core. The pipe feeding wheel 120 can drive the pipe 500 forward, and the damping assembly 140 can provide a backward tensioning force to the pipe 500, so that the pipe 500 can be tightly wound around the core.

[0070] In the present specification and claims, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Because the embodiments disclosed herein can be arranged in various orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A pipe winding machine, comprising: Base (200); A pipe winding disc (400) is mounted on a central rotating shaft (410) and has a supporting wall (420) circumferentially surrounding the outer periphery of the central rotating shaft (410). The supporting wall (420) is used for allowing the pipe (500) to be wound circumferentially thereon. a pipe delivery device (100); It is characterized by Also included are: A support column (600) extends obliquely upward from the base (200), with the oblique direction being backward; The support arm (300) extends forward from the lower end of the support column (600) of the base (200), and the front end of the support arm (300) is provided with a through hole (321) extending from front to back for the pipe (500) to pass through. The pipe winding disc (400) is arranged on the support column (600) in a manner that it can rotate around the central rotation axis (410) extending left and right; The pipe delivery device (100) is provided on the support arm (300) and is located at a position behind the through hole (321) to drive the pipe (500) to move forward; The rear end of the support arm (300) is arranged on the base (200) in a manner capable of rotating up and down around a first axis (L1) extending left and right; The support arm (300) comprises: A first rotating arm (310), one end of which is arranged on the base (200) in a manner capable of rotating up and down around the first axis (L1), and the other end of which is a first free end extending forward; The second rotating arm (320) has a first end which is arranged on the first free end of the first rotating arm (310) in a manner capable of rotating up and down around a second axis (L2) extending in the left-right direction, and a second end which is a second free end extending forward and provided with the above-mentioned through hole (321); The pipe winding machine also includes: A driving mechanism (330), the output end of which acts on the first rotating arm (310) to drive the first rotating arm (310) to rotate up and down; The output end of the rotating mechanism (340) acts on the second rotating arm (320) to drive the second rotating arm (320) to rotate up and down.

2. The tube winding machine according to claim 1, characterized in that: The base (200) includes a body (210) and a turntable (220), wherein the turntable (220) is arranged at the center of the body (210) in a manner capable of rotating around its own vertically extending axis, and the lower end of the support column (600) and the rear end of the support arm (300) are both arranged on the upper surface of the turntable (220); The tube winding machine further comprises a first power member (230), the output end of which acts on the turntable (220) to drive the turntable (220) to rotate.

3. The tube winding machine according to claim 2, characterized in that: The bottom of the body (210) is provided with a running wheel (211), and is also provided with a second power member for driving the running wheel (211) to rotate.

4. The tube winding machine according to claim 1, characterized in that: The first rotating arm (310) and the second rotating arm (320) have a first state in which they are arranged in a straight line and a second state in which they are arranged at an obtuse angle.

5. The tube winding machine according to claim 1, characterized in that: The length of the first rotating arm (310) is smaller than the length of the second rotating arm (320).

6. The tube winding machine according to claim 1, characterized in that: The rotating mechanism (340) includes a worm gear (342) mounted on the first free end of the first rotating arm (310) via a rotating shaft (341) extending left and right, a worm (343) meshing with the worm gear (342), and a hand wheel (344) driving the worm gear (343) to rotate. The first end of the second rotating arm (320) is constrained to the worm gear (342) so that the second rotating arm (320) can rotate together with the worm gear (342).

7. The tube winding machine according to any one of claims 1 to 6, characterized in that: The pipe delivery device (100) comprises: A base (110) is provided on the second rotating arm (320); A pipe delivery wheel (120) has a central axis extending leftward and rightward and an annular wall (121) surrounding the central axis in a circumferential direction. The pipe delivery wheel (120) is arranged on the base (110) in a manner capable of rotating around the central axis. The annular wall (121) is used to support the pipe (500) extending forward and backward. The power mechanism (130) is used to drive the pipe (500) to move forward and pass through the through hole (321) of the second rotating arm (320).

8. The tube winding machine according to claim 7, characterized in that: The pipe feeding device (100) further comprises a damping assembly (140) which is arranged on the base (110) and in front of the pipe feeding wheel (120). The damping assembly (140) is provided with a channel (141) for the pipe (500) to pass through, and the damping assembly (140) is arranged to generate a damping force when the pipe (500) passes through the channel (141) to limit the forward movement of the pipe (500).

9. The tube winding machine according to claim 8, characterized in that: The damping component (140) includes: The roller (142) has a central axis extending left and right and a peripheral wall (143) surrounding the central axis. There are two rollers (142), which are respectively arranged on both sides of the tube (500) in an upper and lower manner so as to be rotatable around their respective central axes. The peripheral walls (143) of the two rollers (142) face each other to form the above-mentioned channel (141); The damping member (144) acts on at least one of the rollers (142) to limit the roller (142) from rotating as the tube (500) moves.

10. The tube winding machine according to claim 9, characterized in that: The damping member (144) is a magnetic powder clutch.

11. The tube winding machine according to claim 7, characterized in that: An extension arm (350) extending leftward and rightward is provided at the first end of the second rotating arm (320), and the base (110) of the pipe delivery device (100) is provided on the extension arm (350) in a manner capable of moving leftward and rightward; The second end of the second rotating arm (320) is provided with a perforated seat (360) with the above-mentioned perforated hole (321) which can move leftward and rightward.

12. The tube winding machine according to claim 11, characterized in that: The pipe delivery device (100) has at least two groups, which are arranged on the extension arm (350) at intervals along the left-right direction; The number of the perforated seats (360) with perforations (321) on the second end of the second rotating arm (320) matches the number of the pipe delivery devices (100) and are arranged at intervals in the left-right direction.

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