A steel pipe feeding device suitable for a pipe shrinking machine and a process thereof

By designing steel pipe loading equipment suitable for pipe shrinking machines, the automatic loading of steel pipes is realized, solving the problems of workers' fatigue, work injury risks and low production efficiency caused by traditional manual loading methods, and improving production efficiency and production capacity.

CN119747420AInactive Publication Date: 2025-04-04CHONGQING WULONG HONGYANG MASCH MFG CO LTD
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Patent Information

Application Number
CN202411889151.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-04-04
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The traditional pipe shrinking machine loading method relies on manual operations, which leads to physical fatigue of workers, increases risk of work injury, and reduces work efficiency. It is slow, making it difficult to meet the needs of large-scale production and high-speed production rhythms, limiting the overall production capacity improvement.

Method used

A steel pipe loading equipment suitable for pipe shrinking machines is designed, including a feeding box, a batch conveying structure, induction blocking assembly and feeding assembly. Through the automated conveying and feeding process, the automatic loading of steel pipes is realized.

Benefits of technology

The automatic loading of steel pipes has been achieved, which reduces the demand for workers to carry steel pipes, reduces the risk of work injuries, improves work efficiency, and can meet the needs of large-scale production and high production rhythms, and improves the overall production capacity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the field of tube shrinking processing technology, and in particular to a steel tube feeding equipment and process suitable for a tube shrinking machine, comprising a feeding box and a conveying assembly placed on the ground, a feeding channel that allows steel tubes to be arranged in sequence is provided at the top of the feeding box, an intermittent conveying structure that only conveys one steel tube at a time is provided at the outlet of the feeding channel, an induction blocking assembly that cooperates with the intermittent conveying structure is provided on the right side of the intermittent conveying structure, a feeding assembly is provided on the right inner wall of the feeding box, the outlet of the feeding assembly is connected to the inlet of the conveying assembly, and a transport cavity is provided on the right side of the feeding box. The present invention can sequentially convey multiple steel tubes to the tube shrinking machine through the feeding channel, the intermittent conveying structure, the feeding assembly and the conveying assembly, thereby eliminating the need for workers to repeatedly carry steel tubes for a long time, reducing the risk of work-related injuries and improving work efficiency, and can meet the production line requirements of large-scale production.
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Description

Technical Field

[0001] The invention relates to the technical field of tube shrinking processing, and in particular to a steel tube feeding device suitable for a tube shrinking machine and a process thereof. Background Art

[0002] In modern industrial production, the processing of steel pipes is widely used in many fields, such as construction, machinery manufacturing, and the automotive industry. As an important equipment for compressing the diameter of steel pipes, the processing efficiency and automation of the pipe shrinking machine play a key role in the cost control and capacity improvement of the entire production process.

[0003] Traditional tube shrinking machine loading methods mostly rely on manual operation, that is, workers carry steel pipes one by one to the processing station of the tube shrinking machine. This manual loading mode has many disadvantages. First, the labor intensity is extremely high. Workers need to repeatedly carry heavy steel pipes for a long time, which can easily cause physical fatigue of workers, thereby increasing the risk of work-related injuries and reducing work efficiency. Secondly, the speed of manual loading is relatively slow, which is difficult to meet the needs of large-scale production and production lines with high production rhythm requirements, and has become a bottleneck restricting the improvement of overall production capacity. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing traditional feeding methods of tube shrinking machines mostly rely on manual operation, which can easily lead to physical fatigue of workers, increase the risk of work-related injuries and reduce work efficiency, and the speed of manual feeding is relatively slow, which is difficult to meet the needs of large-scale production and production lines with high production rhythm requirements, and becomes a bottleneck restricting the improvement of overall production capacity. A steel tube feeding equipment and process suitable for tube shrinking machines are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A steel pipe feeding device suitable for a tube shrinking machine comprises a feeding box and a conveying assembly placed on the ground, a feeding channel for arranging steel pipes in sequence is provided at the top of the feeding box, an intermittent conveying structure for conveying only one steel pipe at a time is provided at the outlet of the feeding channel, an induction blocking assembly cooperating with the intermittent conveying structure is provided on the right side of the intermittent conveying structure, a feeding assembly is provided on the right inner wall of the feeding box, the outlet of the feeding assembly is connected to the inlet of the conveying assembly, and a transport cavity is provided on the right side of the interior of the feeding box.

[0007] Preferably, the conveying assembly comprises a guide frame and a conveying frame, the guide frame is tilted so that it is higher on the left and lower on the right, and the lower end of the conveying frame is connected to the conveying frame.

[0008] Preferably, the outer surface of the guide frame is provided with two symmetrically distributed guide strips, the inner walls on both sides of the guide frame are provided with blocking strips, and the middle end of the conveying frame is provided with an intermittent conveyor belt that stops when used.

[0009] Preferably, the feed channel comprises a large input port and a Z-shaped channel, the large input port is arranged at the top of the feed box, and the Z-shaped channel and the large input port are interconnected.

[0010] Preferably, the intermittent conveying structure includes a power box, a first motor, a rotating disk, a toggle rod, a transmission disk, a fixed rod, a transmission rod, a hexagonal wheel, and a movable notch. The power box is fixedly connected to the outer wall of the conveying box, the first motor is fixedly connected to the inner wall of the power box, the rotating disk is fixedly connected to the output end of the first motor, the toggle rod is fixedly connected to the outermost side of the outer wall of the rotating disk, and the transmission disk is fixedly connected to one end of the transmission rod.

[0011] Preferably, the fixing rod is arranged on the outer wall of the transmission disk, the transmission rod is rotatably connected to the inner wall of the feed box, the hexagonal wheel is fixedly connected to the other end of the transmission rod, the movable notch is arranged at the middle end of the inner wall of the feed box, and the hexagonal wheel is arranged in the movable notch.

[0012] Preferably, the inductive blocking assembly includes a hydraulic cylinder, a fixing clamp, a baffle, symmetrically distributed mounting holes, and an infrared sensor. The hydraulic cylinder is installed on the inner wall of the transport chamber, the fixing clamp is connected to the inner wall of the transport chamber by bolts, the baffle is fixedly connected to the telescopic rod of the hydraulic cylinder, the mounting holes are arranged on both sides of the inner wall of the feed channel outlet, and the infrared sensor is arranged in the mounting holes.

[0013] Preferably, the feeding assembly includes a second motor, a slide, a lead screw, a sliding column, a lifting rod, and a blocking plate. The second motor is arranged at the top of the feed box, the slide is arranged on both sides of the inner wall of the transport chamber, the lead screw is rotatably connected to the slide on the right side, the sliding column is fixedly connected to the inner wall of the slide, the lifting rod is slidably connected to the slide, the lead screw is threadedly connected to the lifting rod, and the blocking plate is fixedly connected to the top of the inner wall of the transport chamber.

[0014] A steel pipe feeding process suitable for a pipe reduction machine comprises the following steps:

[0015] S: First, put multiple steel pipes into the large input port one by one, and let the steel pipes enter the Z-shaped channel one by one;

[0016] S: Then, start the first motor, the first motor drives the rotating disk to rotate, the rotating disk drives the toggle rod to rotate, the toggle rod drives the fixed rod to rotate intermittently, the fixed rod drives the transmission disk to rotate, the transmission disk drives the transmission rod to rotate, the transmission rod drives the hexagonal wheel to rotate, the hexagonal wheel drives a steel pipe to roll into the transport cavity, affected by the slope of the Z-shaped channel, the next steel pipe enters and triggers the infrared sensor, the infrared sensor transmits a signal to the hydraulic cylinder, the hydraulic cylinder extends the telescopic rod to push the baffle down, and blocks the next steel pipe, so that only one steel pipe can pass at a time, reducing the probability of blockage caused by multiple steel pipes mixed together.

[0017] S: Then, the steel pipe rolls along the slope at the bottom of the inner wall of the transport chamber to the lifting rod, and then the second motor is started. The second motor drives the lead screw to rotate, and the lead screw drives the lifting rod to move upward. The lifting rod lifts the steel pipe and pushes it to the top outlet of the feed box, and pushes the steel pipe to the conveying assembly, so that the steel pipes no longer need to be manually carried up one by one by the staff for shrinking.

[0018] S:The steel tube will then fall from the guide rack onto the conveyor rack and be transported to the tube shrinking machine by the intermittent conveyor belt.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the present invention is in use, multiple steel pipes can be placed in the material conveying channel. The steel pipes will be arranged in sequence and fall into the transport cavity. The steel pipes are then pushed one by one onto the loading assembly through the intermittent conveying structure. The loading assembly conveys the steel pipe to the conveying assembly, and the conveying assembly conveys the steel pipe to the tube shrinking machine for processing. Workers are no longer required to repeatedly carry the steel pipes for a long time, which reduces the risk of work-related injuries and improves work efficiency, thereby meeting the production line requirements of large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a steel pipe feeding device suitable for a pipe shrinking machine proposed by the present invention;

[0022] Figure 2 A schematic diagram of a half-sectioned three-dimensional structure of a steel pipe feeding device suitable for a pipe shrinking machine proposed by the present invention;

[0023] Figure 3 A cross-sectional view of a steel pipe feeding device suitable for a pipe shrinking machine proposed by the present invention Figure 1 ;

[0024] Figure 4 A cross-sectional view of a steel pipe feeding device suitable for a pipe shrinking machine proposed by the present invention Figure 2 ;

[0025] Figure 5 The present invention provides a schematic diagram of the internal three-dimensional structure of a power box of a steel pipe feeding device suitable for a pipe shrinking machine.

[0026] In the figure: 1. feed box; 2. conveying assembly; 21. guide frame; 22. guide strip; 23. baffle; 24. conveying frame; 25. intermittent conveyor belt; 3. feed channel; 31. large input port; 32. Z-shaped channel; 4. intermittent conveying structure; 41. power box; 42. first motor; 43. rotating disk; 44. toggle rod; 45. transmission disk; 46. fixing rod; 47. transmission rod; 48. hexagonal wheel; 49. movable notch; 5. induction blocking assembly; 51. hydraulic cylinder; 52. fixing fixture; 53. baffle; 54. mounting hole; 55. infrared sensor; 6. feeding assembly; 61. second motor; 62. slide groove; 63. lead screw; 64. slide column; 65. lifting rod; 66. blocking plate; 7. transport cavity. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1-Figure 5 A steel pipe feeding device suitable for a tube shrinking machine comprises a feeding box 1 and a conveying assembly 2 placed on the ground, wherein a feeding channel 3 for arranging steel pipes in sequence is provided at the top of the feeding box 1, an intermittent conveying structure 4 for conveying only one steel pipe at a time is provided at the outlet of the feeding channel 3, an induction blocking assembly 5 cooperating with the intermittent conveying structure 4 is provided on the right side of the intermittent conveying structure 4, a feeding assembly 6 is provided on the right inner wall of the feeding box 1, the outlet of the feeding assembly 6 is connected with the inlet of the conveying assembly 2, and a transport cavity 7 is provided on the right side inside the feeding box 1.

[0029] It should be noted that the intermittent conveyor belt 25, the first motor 42, the hydraulic cylinder 51, the infrared sensor 55, and the second motor 61 are existing technologies. The specific model specifications need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated.

[0030] Furthermore, the conveying assembly 2 includes a guide frame 21 and a conveying frame 24 . The guide frame 21 is tilted so that it is higher on the left and lower on the right. The lower end of the guide frame 21 is connected to the conveying frame 24 .

[0031] The guide frame 21 and the conveying frame 24 can be exchanged in position or their heights can be raised to accommodate different tube shrinking machines.

[0032] Furthermore, two symmetrically distributed guide bars 22 are provided on the outer surface of the guide frame 21 , blocking bars 23 are provided on the inner walls on both sides of the guide frame 21 , and an intermittent conveyor belt 25 that stops when in use is provided at the middle end of the conveying frame 24 .

[0033] The distance between the baffle 23 and the outer surface of the guide frame 21 is adjusted according to the diameter of the steel pipe so that the steel pipe will not deviate greatly when rolling downward. The guide bar 21 is provided to reduce the contact surface with the steel pipe, thereby reducing the probability of the steel pipe deviating.

[0034] Furthermore, the feed channel 3 includes a large input port 31 and a Z-shaped channel 32 . The large input port 31 is disposed at the top of the feed box 1 , and the Z-shaped channel 32 and the large input port 31 are interconnected.

[0035] The angles between the Z-shaped channels 32 are all set at 20 degrees, so that the steel pipe will not roll down too fast. The diameter of the large input port 31 is adapted to the length of the steel pipe, so that the steel pipe can better enter the feed box 1.

[0036] Furthermore, the intermittent conveying structure 4 includes a power box 41, a first motor 42, a rotating disk 43, a toggle rod 44, a transmission disk 45, a fixed rod 46, a transmission rod 47, a hexagonal wheel 48, and a movable notch 49. The power box 41 is fixedly connected to the outer wall of the conveying box 1, the first motor 42 is fixedly connected to the inner wall of the power box 41, the rotating disk 43 is fixedly connected to the output end of the first motor 42, the toggle rod 44 is fixedly connected to the outermost side of the outer wall of the rotating disk 43, and the transmission disk 45 is fixedly connected to one end of the transmission rod 47.

[0037] The first motor 42 is started, the first motor 42 drives the rotating disk 43 to rotate, the rotating disk 43 drives the toggle rod (44) to rotate, the toggle rod (44) drives the fixed rod (46) to rotate intermittently, the fixed rod (46) drives the transmission disk (45) to rotate, the transmission disk (45) drives the transmission rod (47) to rotate, the transmission rod (47) drives the hexagonal wheel (48) to rotate, and the hexagonal wheel (48) drives a steel pipe to roll into the transport cavity (7).

[0038] Furthermore, a fixed rod 46 is arranged on the outer wall of the transmission disk 45, the transmission rod 47 is rotatably connected to the inner wall of the feed box 47, the hexagonal wheel 48 is fixedly connected to the other end of the transmission rod 47, and a movable notch 49 is arranged at the middle end of the inner wall of the feed box 1, and the hexagonal wheel 48 is arranged in the movable notch 49.

[0039] The toggle rod 44 and the fixing rod 46 are meshed with each other, and the curvature of the surface of the hexagonal wheel 48 is adapted according to the diameter of the steel pipe.

[0040] Furthermore, the inductive blocking assembly 5 includes a hydraulic cylinder 51, a fixing clamp 52, a baffle 53, symmetrically distributed mounting holes 54, and an infrared sensor 55. The hydraulic cylinder 51 is installed on the inner wall of the transport chamber 7, the fixing clamp 52 is connected to the inner wall of the transport chamber 7 by bolts, the baffle 53 is fixedly connected to the telescopic rod of the hydraulic cylinder 51, the mounting holes 54 are arranged on both sides of the inner wall of the outlet of the feed channel 3, and the infrared sensor 55 is arranged in the mounting hole 54.

[0041] The inductive blocking component 5 enters through the next steel pipe and triggers the infrared sensor (55), and the infrared sensor (55) transmits a signal to the hydraulic cylinder (51). The hydraulic cylinder (51) extends a telescopic rod to push the baffle (53) downward to block the next steel pipe, so that only one steel pipe can pass through at a time, reducing the probability of multiple steel pipes mixing together and causing blockage.

[0042] Furthermore, the feeding assembly 6 includes a second motor 61, a slide 62, a lead screw 63, a slide column 64, a lifting rod 65, and a blocking plate 66. The second motor 61 is arranged at the top of the feed box 1, the slide 62 is arranged on both sides of the inner wall of the transport chamber 7, the lead screw 63 is rotatably connected to the slide 62 on the right side, the slide column 64 is fixedly connected to the inner wall of the slide 62, the lifting rod 65 is slidably connected to the slide 62, the lead screw 63 is threadedly connected to the lifting rod 65, and the blocking plate 66 is fixedly connected to the top of the inner wall of the transport chamber 7.

[0043] The loading assembly 6 starts the second motor (61), which drives the lead screw (63) to rotate, and the lead screw (63) drives the lifting rod (65) to move upward. The lifting rod (65) lifts the steel pipe and pushes it to the top outlet of the feed box (1), and pushes the steel pipe to the conveying assembly (2), so that the steel pipes no longer need to be manually carried up one by one by the staff for shrinking.

[0044] A steel pipe feeding process suitable for a pipe reduction machine comprises the following steps:

[0045] S1: First, multiple steel pipes are placed into the large input port 31 one by one, and the steel pipes enter the Z-shaped channel 32 one by one;

[0046] S2: Then, the first motor 42 is started, the first motor 42 drives the rotating disk 43 to rotate, the rotating disk 43 drives the toggle rod 44 to rotate, the toggle rod 44 drives the fixed rod 46 to rotate intermittently, the fixed rod 46 drives the transmission disk 45 to rotate, the transmission disk 45 drives the transmission rod 47 to rotate, the transmission rod 47 drives the hexagonal wheel 48 to rotate, the hexagonal wheel 48 drives a steel pipe to roll into the transport cavity 7, affected by the slope of the Z-shaped channel 32, the next steel pipe enters and triggers the infrared sensor 55, the infrared sensor 55 transmits a signal to the hydraulic cylinder 51, the hydraulic cylinder 51 extends the telescopic rod to push the baffle 53 downward, and blocks the next steel pipe, so that only one steel pipe can pass through at a time, reducing the probability of multiple steel pipes being mixed together and causing blockage.

[0047] S3: Then, the steel pipe rolls onto the lifting rod 65 along the slope at the bottom end of the inner wall of the transport chamber 7, and then the second motor 61 is started. The second motor 61 drives the lead screw 63 to rotate, and the lead screw 63 drives the lifting rod 65 to move upward. The lifting rod 65 lifts the steel pipe and pushes it to the top outlet of the feed box 1, and pushes the steel pipe to the conveying assembly 2, so that the steel pipes no longer need to be manually carried up one by one by the staff for shrinking.

[0048] S4: The steel pipe will then fall from the guide frame 21 onto the conveying frame 24 and be transported to the tube shrinking machine by the intermittent conveyor belt 25.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel pipe feeding device suitable for a pipe shrinking machine, comprising a feeding box (1) placed on the ground and a conveying assembly (2), characterized in that: The top of the feed box (1) is provided with a feed channel (3) for allowing the steel pipes to be arranged in sequence, and the outlet of the feed channel (3) is provided with an intermittent conveying structure (4) for conveying only one steel pipe at a time, and the right side of the intermittent conveying structure (4) is provided with an induction blocking component (5) that cooperates with it, and the right inner wall of the feed box (1) is provided with a loading component (6), and the outlet of the loading component (6) is connected to the inlet of the conveying component (2), and the right side of the feed box (1) is provided with a transport cavity (7).

2. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 1, characterized in that: The conveying assembly (2) comprises a guide frame (21) and a conveying frame (24); the guide frame (21) is arranged obliquely with the left side higher and the right side lower; and the lower end of the guide frame (21) is connected to the conveying frame (24).

3. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 2, characterized in that: The outer surface of the guide frame (21) is provided with two symmetrically distributed guide strips (22), the inner walls on both sides of the guide frame (21) are provided with blocking strips (23), and the middle end of the conveying frame (24) is provided with an intermittent conveyor belt (25) that stops immediately after use.

4. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 1, characterized in that: The material conveying channel (3) comprises a large input port (31) and a Z-shaped channel (32); the large input port (31) is arranged at the top end of the material conveying box (1); and the Z-shaped channel (32) and the large input port (31) are interconnected.

5. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 1, characterized in that: The intermittent conveying structure (4) comprises a power box (41), a first motor (42), a rotating disk (43), a toggle rod (44), a transmission disk (45), a fixed rod (46), a transmission rod (47), a hexagonal wheel (48), and a movable notch (49); the power box (41) is fixedly connected to the outer wall of the conveying box (1); the first motor (42) is fixedly connected to the inner wall of the power box (41); the rotating disk (43) is fixedly connected to the output end of the first motor (42); the toggle rod (44) is fixedly connected to the outermost side of the outer wall of the rotating disk (43); and the transmission disk (45) is fixedly connected to one end of the transmission rod (47).

6. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 5, characterized in that: The fixing rod (46) is arranged on the outer wall of the transmission disk (45), the transmission rod (47) is rotatably connected to the inner wall of the feed box (47), the hexagonal wheel (48) is fixedly connected to the other end of the transmission rod (47), the movable notch (49) is arranged at the middle end of the inner wall of the feed box (1), and the hexagonal wheel (48) is arranged in the movable notch (49).

7. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 1, characterized in that: The inductive blocking assembly (5) comprises a hydraulic cylinder (51), a fixing fixture (52), a baffle (53), symmetrically distributed mounting holes (54), and an infrared sensor (55); the hydraulic cylinder (51) is mounted on the inner wall of the transport chamber (7); the fixing fixture (52) is connected to the inner wall of the transport chamber (7) by bolts; the baffle (53) is fixedly connected to the telescopic rod of the hydraulic cylinder (51); the mounting holes (54) are arranged on both sides of the inner wall of the outlet of the feeding channel (3); and the infrared sensor (55) is arranged in the mounting hole (54).

8. The steel pipe feeding equipment suitable for a pipe shrinking machine according to claim 1, characterized in that: The feeding assembly (6) includes a second motor (61), a slide groove (62), a lead screw (63), a slide column (64), a lifting rod (65), and a blocking plate (66). The second motor (61) is arranged at the top of the feed box (1), the slide groove (62) is arranged on both sides of the inner wall of the transport chamber (7), the lead screw (63) is rotatably connected to the slide groove (62) on the right side, the slide column (64) is fixedly connected to the inner wall of the slide groove (62), the lifting rod (65) is slidably connected to the slide groove (62), the lead screw (63) is threadedly connected to the lifting rod (65), and the blocking plate (66) is fixedly connected to the top of the inner wall of the transport chamber (7).

9. A steel pipe feeding process suitable for a pipe reduction machine, characterized in that: Using the steel pipe feeding equipment suitable for a pipe shrinking machine as described in any one of claims 1 to 8 comprises the following steps: S1: First, multiple steel pipes are placed into the large input port (31) one by one, and then the steel pipes enter the Z-shaped channel (32) one by one; S2: Then, the first motor 42 is started, the first motor 42 drives the rotating disk 43 to rotate, the rotating disk 43 drives the toggle rod (44) to rotate, the toggle rod (44) drives the fixed rod (46) to rotate intermittently, the fixed rod (46) drives the transmission disk (45) to rotate, the transmission disk (45) drives the transmission rod (47) to rotate, the transmission rod (47) drives the hexagonal wheel (48) to rotate, the hexagonal wheel (48) drives a steel pipe to roll into the transport cavity (7), and under the influence of the slope of the Z-shaped channel (32), the next steel pipe enters and triggers the infrared sensor (55), the infrared sensor (55) transmits a signal to the hydraulic cylinder (51), the hydraulic cylinder (51) extends the telescopic rod to push the baffle (53) downward, and blocks the next steel pipe, so that only one steel pipe can pass through at a time, reducing the probability of multiple steel pipes mixing together and causing blockage. S3: Then, the steel pipe rolls along the slope at the bottom end of the inner wall of the transport chamber (7) onto the lifting rod (65), and then the second motor (61) is started. The second motor (61) drives the lead screw (63) to rotate, and the lead screw (63) drives the lifting rod (65) to move upward. The lifting rod (65) lifts the steel pipe and pushes it to the top outlet of the feed box (1), and pushes the steel pipe to the conveying assembly (2), so that the steel pipes no longer need to be manually carried up one by one by the staff for shrinking. S4: The steel pipe then falls from the guide frame (21) onto the conveying frame (24) and is transported to the tube shrinking machine by the intermittent conveyor belt (25).