Automatic oil scraping device for inner wall of rolled steel pipe and working method thereof

Abstract

The application provides a kind of automatic oil scraping device for inner wall of rolled steel pipe and its working method, which has high degree of automation, fast plug speed, good oil scraping effect, high working efficiency and low labor intensity.The transverse seat is arranged on the plug mechanism base;The lifting seat is arranged on the transverse seat;The centering mechanism is arranged on the lifting seat;The push rod mechanism is arranged behind the centering mechanism;The push rod mechanism is arranged on the lifting seat;The push rod is fixedly installed on the push rod mechanism base;The sealing joint is arranged on the lifting seat and located between the centering mechanism and the push rod mechanism;The push rod interface and the steel pipe interface are fixed;The sealing ring is arranged between the push rod interface and the steel pipe interface;The plug feeding block is arranged on the lifting seat;The oil scraping plug feeding system is connected with the plug feeding block;The clamping clamp is arranged on the clamping mechanism base;The feeding rod and the lifting support frame are arranged on the transfer mechanism base, and the feeding rod is connected with the lifting support frame;The trolley support is arranged on the transfer mechanism base;The plug receiving box is arranged on the trolley support.

Description

Technical Field

[0001] This invention relates to an automatic oil scraping device for the inner wall of rolled steel pipe and its working method. Background Technology

[0002] Cold rolling is an important production process for seamless steel pipes. After pickling, the billet steel pipe undergoes cold rolling on a rolling mill. Through multiple rolling passes, the billet gradually deforms to achieve the required inner and outer diameter dimensions. After cold rolling, a large amount of rolling oil and iron filings remain on the inner wall of the steel pipe. The oil residue on the inner wall of the steel pipe puts significant pressure on the subsequent degreasing process, and oil leakage during the lifting and transportation of the steel pipe also affects the working environment. Therefore, degreasing treatment is necessary. After treatment with degreasing liquid, the oil stains remaining on the inner and outer walls of the steel pipe can be cleaned. After the degreasing process, a small amount of degreasing liquid remains on the inner wall of the steel pipe. How to remove the degreasing liquid remaining on the inner wall of the steel pipe to meet the requirements of subsequent heat treatment processes is an important issue. The traditional method is to manually operate an air gun to purge the inner wall of the steel pipe, as shown in Chinese Patent Application No. 202022496175.X, entitled "A Steel Pipe Oil Scraping Device". This method is labor-intensive, inefficient, and affects the production cycle. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings in the prior art and to provide an automatic oil scraping device for the inner wall of rolled steel pipe with a reasonable structural design and its working method, which has a high degree of automation, fast plugging speed, good oil scraping effect, high working efficiency and low labor intensity.

[0004] The technical solution adopted by this invention to solve the above problems is as follows: An automatic oil scraping device for the inner wall of rolled steel pipe, comprising a plugging mechanism, a clamping mechanism, a transfer mechanism, and a plug receiving trolley; the plugging mechanism includes a plugging machine, an oil scraping plug feeding system, a plugging mechanism base, a transverse shift seat, a transverse shift seat moving mechanism, a lifting seat, and a lifting seat moving mechanism; the transverse shift seat is mounted on the plugging mechanism base via the transverse shift seat moving mechanism; the lifting seat is mounted on the transverse shift seat via the lifting seat moving mechanism; the plugging machine includes a plug feeding block, a centering mechanism, a sealing joint, and a push rod mechanism; the centering mechanism is mounted on the lifting seat; the push rod mechanism is located behind the centering mechanism and includes a compressed air interface, a push rod moving mechanism, a push rod mechanism base plate, a sealing block, and a push rod; the push rod mechanism base plate is mounted on the lifting seat via the push rod moving mechanism; the push rod is fixedly mounted on the push rod mechanism base plate; the push rod is provided with a sealing block, an air outlet, and a compressed air interface; the sealing joint is located on the lifting seat and is situated at the centering mechanism. Between the push rod mechanism and the push rod mechanism, it includes a push rod interface, a sealing ring, and a steel pipe interface; the push rod interface and the steel pipe interface are fixed, with the push rod interface facing the push rod mechanism and the steel pipe interface facing the centering mechanism; the sealing ring is set between the push rod interface and the steel pipe interface; the feed plug is set on the lifting seat through the feed plug lifting mechanism, and the feed plug is located between the sealing joint and the push rod mechanism; the oil scraper feed system is connected to the feed plug; the clamping mechanism includes a clamping mechanism base, a clamping fixture, and a fixture lifting mechanism; the clamping fixture is set on the clamping mechanism base through the fixture lifting mechanism; the transfer mechanism includes a transfer mechanism base, a lifting support frame, and a feeding rod; the feeding rod and the lifting support frame are both set on the transfer mechanism base, and the feeding rod is connected to the lifting support frame; the plug receiving trolley includes a trolley bracket, a plug receiving box, and a trolley moving mechanism; the trolley bracket is set on the transfer mechanism base through the trolley moving mechanism; the plug receiving box is set on the trolley bracket.

[0005] The centering mechanism of the present invention includes a centering block moving mechanism and a centering block; the centering block is movably mounted on the lifting seat, and there is a pair of centering blocks arranged vertically opposite each other. Each of the pair of centering blocks is equipped with a separate centering block moving mechanism, and the centering block moving mechanism is connected to the centering block.

[0006] The oil scraper feeding system of the present invention is fixedly installed on the transverse seat. The oil scraper feeding system includes a feeder and a slide. The inlet section of the slide is connected to the outlet of the feeder, and the outlet section of the slide is connected to the lifting seat and connected to the feeder block.

[0007] The transfer mechanism of the present invention also includes a feeding rod, which is mounted on the base of the transfer mechanism and connected to the lifting support frame.

[0008] The transfer mechanism of the present invention also includes a material collection rack, which is fixedly mounted on the base of the transfer mechanism and connected to the material discharge rod.

[0009] The feeding rod described in this invention is rotatably mounted on the base of the transfer mechanism via a rotating mechanism.

[0010] The rotating mechanism of the present invention includes a rotating swing arm and a rotating swing arm rotating mechanism. The feeding rod is fixed on the rotating swing arm, and the rotating swing arm is rotatably mounted on the base of the transfer mechanism through the rotating swing arm rotating mechanism.

[0011] The lower end of the connector box described in this invention is provided with a flip cover.

[0012] The plug receiving trolley described in this invention also includes a waste collection box, which is mounted on the trolley bracket and located below the plug receiving box.

[0013] A method for operating an automatic oil scraping device for the inner wall of a rolled steel pipe includes the following steps: (a) Steel pipe feeding, including the following steps: (1) The rolled steel pipe is placed on the loading bar and slides down from the loading bar onto the lifting support frame; (2) The lifting support frame drives the steel pipe to rise to the plugging station; (3) The clamping lifting mechanism drives the clamping fixture to rise, and the clamping fixture clamps the steel pipe; (ii) Pipe plugging, including the following steps: (1) The trolley support moves on the base of the transfer mechanism through the trolley moving mechanism, and puts the tail of the steel pipe into the receiving box; (2) The transverse moving mechanism drives the transverse moving seat to move towards the steel pipe on the base of the plugging mechanism, while the lifting moving mechanism drives the lifting seat to rise and fall on the transverse moving seat, so that the head of the steel pipe enters the centering mechanism. (3) The centering mechanism centers the head of the steel pipe; (4) The transverse moving mechanism continues to drive the transverse moving seat to move, so that the head of the steel pipe is inserted into the steel pipe interface and the sealing ring; (5) The oil scraper feeding system delivers the oil scraper to the feeder block; the feeder block lifting mechanism drives the feeder block to rise, and the feeder block lifts the oil scraper to the plugging position; (6) The push rod moving mechanism drives the push rod mechanism base plate to move forward on the lifting seat. The push rod mechanism base plate drives the push rod to move forward. After the push rod pushes the oil scraper plug into the push rod interface, it gradually pushes it into the steel pipe until the sealing block fits with the sealing joint. (7) Compressed air enters the push rod through the compressed air interface and is then ejected through the air outlet. The oil scraper inside the steel pipe is ejected from the tail end of the steel pipe under the action of compressed air. The rolling oil and oil scraper inside the steel pipe fall into the plug box, completing the plugging process.

[0014] Compared with the prior art, the present invention has the following advantages and effects: The present invention has the advantages of high automation, fast plugging speed, good oil scraping effect, high work efficiency and low labor intensity. By setting up a plugging mechanism, a clamping mechanism, a transfer mechanism and a plug receiving trolley, the present invention can realize automatic alignment, automatic sealing, automatic feeding and automatic plugging and oil scraping of steel pipes, replacing manual plugging, greatly reducing labor intensity, improving work efficiency, reducing cleaning pressure for subsequent degreasing processes and extending the service life of degreasing solution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axonal structure of the stopper mechanism according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the shaft side structure of the clamping mechanism according to an embodiment of the present invention.

[0017] Figure 3 This is a side view of the clamping mechanism according to an embodiment of the present invention.

[0018] Figure 4 This is a front view schematic diagram of the clamping mechanism according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the axonal structure of the transfer mechanism according to an embodiment of the present invention.

[0020] Figure 6 This is a side view of the transfer mechanism according to an embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the axle side structure of the connecting trolley in an embodiment of the present invention.

[0022] Figure 8 This is a side view of the connecting trolley structure according to an embodiment of the present invention.

[0023] Figure 9 This is a schematic diagram of the front view of the connecting trolley in an embodiment of the present invention.

[0024] Figure 10 This is a top view of the connecting trolley in an embodiment of the present invention.

[0025] Figure 11 This is a schematic diagram of the axonal structure of the stopper mechanism according to an embodiment of the present invention.

[0026] Figure 12 This is a side view of the stopper mechanism according to an embodiment of the present invention.

[0027] Figure 13 This is a partial axial side structural diagram of the stopper mechanism according to an embodiment of the present invention.

[0028] Figure 14This is a partial top view of the stopper mechanism according to an embodiment of the present invention.

[0029] Figure 15 This is a schematic diagram of the push rod interface of the plugging mechanism in an embodiment of the present invention.

[0030] Figure 16 This is a schematic diagram of the steel pipe interface of the plugging mechanism in an embodiment of the present invention.

[0031] Figure 17 This is a cross-sectional structural schematic diagram of the steel pipe interface of the plugging mechanism in an embodiment of the present invention.

[0032] Figure 18 This is a schematic diagram of the sealing ring structure of the plugging mechanism in an embodiment of the present invention.

[0033] Figure 19 This is a schematic diagram of the axial structure of the push rod mechanism of the stopper mechanism in an embodiment of the present invention.

[0034] Figure 20 This is a side view of the push rod mechanism of the stopper mechanism in an embodiment of the present invention.

[0035] Figure 21 This is a schematic diagram of the steel pipe being fed to the feeding rod according to an embodiment of the present invention.

[0036] Figure 22 This is a schematic diagram of the steel pipe sliding onto the lifting support frame according to an embodiment of the present invention.

[0037] Figure 23 This is a schematic diagram of the steel pipe sliding from the feeding rod onto the collecting rack in an embodiment of the present invention. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0039] The embodiments of the present invention include a plugging mechanism 10, a clamping mechanism 20, a transfer mechanism 30, and a plug receiving trolley 40.

[0040] I. The plugging mechanism 10 includes a plugging machine 101, an oil scraper plug feeding system 102, a plugging mechanism base 103, a transverse shifting mechanism 104, a transverse shifting seat 107, a lifting seat 110, and a lifting seat moving mechanism 113.

[0041] The transverse shifting mechanism 104 is connected to the transverse shifting seat 107 and the stoppering mechanism base 103. The transverse shifting seat 107 is movably mounted on the stoppering mechanism base 103 via the transverse shifting mechanism 104. The transverse shifting mechanism 104 can drive the transverse shifting seat 107 to move horizontally on the stoppering mechanism base 103, thereby driving the entire stoppering machine 101 and the oil scraper feeding system 102 to move horizontally on the stoppering mechanism base 103. The transverse shifting mechanism 104 can be a conventional mechanism consisting of a motor, rack and pinion, and guide rail; the specific structure will not be described in detail.

[0042] The lifting seat moving mechanism 113 is connected to the lifting seat 110 and the transverse seat 107. The lifting seat 110 is movably mounted on the transverse seat 107 via the lifting seat moving mechanism 113, which drives the lifting seat 110 to move up and down on the transverse seat 107. The lifting seat moving mechanism 113 includes a drive motor 109 and a screw jack 108. Both the drive motor 109 and the screw jack 108 are bolted to the transverse seat 107. The drive motor 109 is connected to the screw jack 108, and the lifting rod of the screw jack 108 is fixedly connected to the lifting seat 110. The drive motor 109 drives the screw jack 108 to move, and the screw jack 108 drives the lifting seat 110 to move up and down, thereby adjusting the height of the lifting seat 110. Furthermore, there are four screw jacks 108.

[0043] The stopper machine 101 includes a stopper lifting mechanism 105, a stopper feeding block 106, a centering mechanism 120, a sealing joint 116, and a push rod mechanism 117.

[0044] The centering mechanism 120 is mounted on the lifting base 110 and includes a centering block moving mechanism 111 and a centering block 112. The centering blocks 112 are movably mounted on the lifting base 110. There is a pair of centering blocks 112, arranged vertically opposite each other. Each pair of centering blocks 112 is equipped with a separate centering block moving mechanism 111, which is connected to and drives the centering block 112 to move. The centering block moving mechanism 111 is a pneumatic cylinder or an electric cylinder. Furthermore, the centering block 112 is made of polyurethane and is V-shaped. The centering blocks 112 clamp vertically to ensure that the center of the steel pipe 1 is aligned with the center of the sealing joint 116.

[0045] The push rod mechanism 117 is mounted on the lifting seat 110 and located behind the centering mechanism 120. The push rod mechanism 117 includes a compressed air interface 122, a push rod moving mechanism 124, a push rod mechanism base plate 125, a sealing block 126, and a push rod 127. The push rod moving mechanism 124 is connected to the push rod mechanism base plate 125 and the lifting seat 110. The push rod mechanism base plate 125 is movably mounted on the lifting seat 110 via the push rod moving mechanism 124. The push rod moving mechanism 124 can drive the push rod mechanism base plate 125 to move horizontally on the lifting seat 110, thereby driving the entire push rod mechanism 117 to move horizontally on the lifting seat 110. The push rod moving mechanism 124 uses a conventional motor gear and rack mechanism for drive. The push rod 127 is fixedly mounted on the push rod mechanism base plate 125 by bolts and is a hollow rod. A sealing block 126 is fixed in the middle of the push rod 127. The sealing block 126 is made of polyurethane. An air outlet 123 is opened in the center and side of the front part, and a compressed air interface 122 is provided at the rear. Compressed air enters the push rod 127 through the compressed air interface 122 and is then sprayed out through the air outlet 123 to perform the plugging action.

[0046] A sealing joint 116 is fixedly mounted on the lifting seat 110, located between the centering mechanism 120 and the push rod mechanism 117. The sealing joint 116 includes a push rod interface 128, a sealing ring 129, and a steel pipe interface 130. The steel pipe interface 130 is fixedly mounted on the lifting seat 110 by bolts. The push rod interface 128 and the steel pipe interface 130 are bolted together, with the push rod interface 128 facing the push rod mechanism 117 and the steel pipe interface 130 facing the centering mechanism 120. A flared opening 132 is provided on the outer side of the steel pipe interface 130 for guidance, ensuring that the center of the steel pipe 1 coincides with the center of the push rod. The sealing ring 129 is an inflatable sealing ring, with an air nozzle 131. Compressed air is introduced through the air nozzle 131 to expand the sealing ring 129, thereby achieving a seal on the outer diameter of the steel pipe 1. The sealing ring 129 is fixed between the push rod interface 128 and the steel pipe interface 130. Furthermore, the sealing joint 116 can be replaced according to the inner and outer diameters of the steel pipe 1 to accommodate different steel pipes 1.

[0047] The plug 106 is lifted and mounted on the lifting seat 110 via the plug lifting mechanism 105, and the plug 106 is located between the sealing joint 116 and the push rod mechanism 117.

[0048] The oil scraper feeding system 102 is used to supply oil scraper plugs 119 made of rubber. The oil scraper feeding system 102 is bolted to the transverse support 107 and is connected to the feeder block 106. The oil scraper feeding system 102 includes a feeder 118, a slide 114, and a vibrator 115. The feeder 118 is a push-plate feeder. The inlet section of the slide 114 is connected to the outlet of the feeder 118, and the outlet section of the slide 114 is connected to the lifting support 110 and connected to the feeder block 106. A vibrator 115 is installed at the bottom of the outlet section of the slide 114. During continuous feeding, the vibration of the vibrator 115 can be controlled to prevent the oil scraper plugs 119 from accumulating. A buffer plate 121 is provided in the slide 114 to prevent the oil scraper plugs 119 from flying out of the slide 114 due to excessive speed.

[0049] II. The clamping mechanism 20 includes a clamping mechanism base 201, a clamping fixture 202, and a fixture lifting mechanism 203.

[0050] The clamping fixture 202 is movably mounted on the clamping mechanism base 201 via a clamping lifting mechanism 203. The clamping lifting mechanism 203 drives the clamping fixture 202 to move up and down on the clamping mechanism base 201. A polyurethane plate is installed on the clamping fixture 202 to prevent direct metal-to-metal contact with the stainless steel pipe, thus preventing scratches. The clamping lifting mechanism 203 can be a conventional mechanism consisting of a hydraulic cylinder and a guide rail; its specific structure will not be described in detail.

[0051] III. The transfer mechanism 30 includes a transfer mechanism base 301, a lifting support frame 304, a feeding rod 305, a discharging rod 306, and a material collection frame 307.

[0052] The lifting support frame 304 is fixedly mounted on the base 301 of the transfer mechanism. After the plugging is completed, manual unloading can also be performed. However, to further improve the degree of automation, the transfer mechanism 30 is equipped with a unloading rod 306, which is fixedly mounted on the base 301 of the transfer mechanism. Both the loading rod 305 and the unloading rod 306 are connected to the lifting support frame 304.

[0053] The loading rod 305 is rotatably mounted on the transfer mechanism base 301 via a rotating mechanism. The rotating mechanism includes a rotating arm 302 and a rotating arm rotating mechanism 303. The loading rod 305 is fixed to the rotating arm 302, which is rotatably mounted on the transfer mechanism base 301 via the rotating arm rotating mechanism 303. The rotating arm rotating mechanism 303 can drive the rotating arm 302 to rotate between 0 and 90 degrees. When a steel pipe needs to be docked and transferred, the rotating arm rotating mechanism 303 drives the rotating arm 302 to a 90-degree position, and the loading rod 305 completes the docking and transfer of the steel pipe. In other cases, the rotating arm 302 remains at a 0-degree position and will not interfere with the process of the steel pipe 1 falling from the lifting support frame 304 to the unloading rod 306. The rotating arm rotating mechanism 303 can adopt existing conventional mechanisms such as cylinder connecting rods; the specific structure will not be described in detail.

[0054] The material collection rack 307 is fixedly mounted on the base 301 of the transfer mechanism and is connected to the material discharge rod 306.

[0055] There are 30 or more transfer mechanisms, arranged in sequence with a spacing of 1500mm.

[0056] IV. The plug receiving trolley 40 includes a trolley bracket 401, a plug receiving box 402, a trolley moving mechanism 403, and a waste collection box 405.

[0057] The trolley bracket 401 is movably mounted on the transfer mechanism base 301 via the trolley moving mechanism 403, and the trolley bracket 401 can move on the transfer mechanism base 301 via the trolley moving mechanism 403.

[0058] The plug receiving box 402 is fixedly mounted on the trolley bracket 401. A flip-top 404 is located at the lower end of the plug receiving box 402. A waste collection box 405 is fixedly mounted on the trolley bracket 401, located below the plug receiving box 402. When the waste (rolling oil and plugs) inside the plug receiving box 402 needs to be cleaned, the flip-top 404 is opened and the waste is poured into the waste collection box 405.

[0059] V. The working method of the automatic oil scraping device on the inner wall of the rolled steel pipe according to an embodiment of the present invention includes the following steps: (a) Steel pipe feeding, including the following steps: (1) The rotating arm rotation mechanism 303 drives the rotating arm 302 to the receiving position at 90 degrees, and the rolled steel pipe 1 is placed on the feeding rod 305, such as Figure 21 As shown; steel pipe 1 slides down onto lifting support frame 304 via loading rod 305, as... Figure 22 As shown; (2) The lifting support frame 304 drives the steel pipe 1 to rise to the plugging position; (3) The clamping lifting mechanism 203 drives the clamping clamp 202 to rise, and the clamping clamp 202 clamps the steel pipe 1; the rotating arm rotating mechanism 303 drives the rotating arm 302 to move back to the 0-degree position of the clearance position; (ii) Pipe plugging, including the following steps: (1) The trolley bracket 401 moves on the transfer mechanism base 301 via the trolley moving mechanism 403, and puts the tail of the steel pipe 1 into the receiving box 402; (2) The transverse moving mechanism 104 drives the transverse moving seat 107 to move horizontally towards the steel pipe 1 on the base 103 of the plugging mechanism. At the same time, the lifting moving mechanism 113 drives the lifting seat 110 to move up and down on the transverse moving seat 107, so that the head of the steel pipe 1 enters between a pair of centering blocks 112 of the centering mechanism 120. (3) The pair of centering blocks 112 move by the centering block moving mechanism 111 respectively, and center the head center of the steel pipe 1, so that the head center of the steel pipe 1 is aligned with the center of the sealing joint 116. (4) The transverse moving mechanism 104 continues to drive the transverse moving seat 107 to move, so that the head of the steel pipe 1 is inserted into the steel pipe interface 130 and the sealing ring 129; compressed air is introduced through the air nozzle 131 to expand the sealing ring 129, thereby sealing the outer diameter of the steel pipe 1. (5) The feeder 118 sends the oil scraper 119 to the feeder block 106 through the slide 114; the feeder block lifting mechanism 105 drives the feeder block 106 to rise, and the feeder block 106 lifts the oil scraper 119 to the position of the feeder block after aligning with the center line of the feeder block. (6) The push rod moving mechanism 124 drives the push rod mechanism base plate 125 to move forward horizontally on the lifting seat 110. The push rod mechanism base plate 125 drives the push rod 127 to move forward horizontally. The push rod 127 pushes the oil scraper plug 119 into the push rod interface 128, and then gradually pushes it into the steel pipe 1 until the sealing block 126 and the end face of the sealing joint 116 are in contact, thus achieving end face sealing. (7) Compressed air enters the push rod 127 through the compressed air interface 122 and is then ejected through the air outlet 123. The oil scraper 119 inside the steel pipe 1 is ejected from the tail end of the steel pipe 1 under the action of compressed air. The rolling oil inside the steel pipe 1 and the oil scraper 119 fall into the plug box 402 to realize the plugging process. (III) Steel pipe cutting, including the following steps: After the plugging is completed, the clamping fixture 202 releases the steel pipe 1 and lowers it to its original position. The lifting support frame 304 also lowers to its original position, and the steel pipe 1 falls onto the unloading rod 306 and slides down along the unloading rod 306 onto the collecting rack 307. Figure 23 As shown.

[0060] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components, etc. The above description is merely illustrative of the structure of the present invention. All equivalent or simple variations made based on the structure, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. An automatic oil scraping device for the inner wall of a rolled steel pipe, characterized in that: The system includes a plugging mechanism, a clamping mechanism, a transfer mechanism, and a plug receiving trolley. The plugging mechanism includes a plugging machine, a plug scraping and feeding system, a plugging mechanism base, a transverse shift seat, a transverse shift seat moving mechanism, a lifting seat, and a lifting seat moving mechanism. The transverse shift seat is mounted on the plugging mechanism base via the transverse shift seat moving mechanism. The lifting seat is mounted on the transverse shift seat via the lifting seat moving mechanism. The plugging machine includes a plug feeding block, a centering mechanism, a sealing joint, and a push rod mechanism. The centering mechanism is mounted on the lifting seat. The push rod mechanism is located behind the centering mechanism and includes a compressed air interface, a push rod moving mechanism, a push rod mechanism base plate, a sealing block, and a push rod. The push rod mechanism base plate is mounted on the lifting seat via the push rod moving mechanism. The push rod is fixedly mounted on the push rod mechanism base plate. The push rod is equipped with a sealing block, an air outlet, and a compressed air interface. The sealing joint is located on the lifting seat and between the centering mechanism and the push rod mechanism, and includes a push rod interface, a sealing ring, and a steel pipe interface. The push rod interface and the steel pipe interface are fixed, with the push rod interface facing the push rod mechanism and the steel pipe interface facing the centering mechanism; a sealing ring is set between the push rod interface and the steel pipe interface; the feed plug is set on the lifting seat through the feed plug lifting mechanism, and the feed plug is located between the sealing joint and the push rod mechanism; the oil scraper feed system is connected to the feed plug; the clamping mechanism includes a clamping mechanism base, a clamping fixture, and a fixture lifting mechanism; the clamping fixture is set on the clamping mechanism base through the fixture lifting mechanism; the transfer mechanism includes a transfer mechanism base, a lifting support frame, and a feeding rod; the feeding rod and the lifting support frame are both set on the transfer mechanism base, and the feeding rod is connected to the lifting support frame; the plug receiving trolley includes a trolley bracket, a plug receiving box, and a trolley moving mechanism; the trolley bracket is set on the transfer mechanism base through the trolley moving mechanism; the plug receiving box is set on the trolley bracket.

2. The automatic oil scraping device for the inner wall of the rolled steel pipe according to claim 1, characterized in that: The centering mechanism includes a centering block moving mechanism and a centering block; the centering block is moved and mounted on the lifting seat, and there is a pair of centering blocks, which are arranged vertically opposite each other. Each of the pair of centering blocks is equipped with a separate centering block moving mechanism, and the centering block moving mechanism is connected to the centering block.

3. The automatic oil scraping device for the inner wall of rolled steel pipe according to claim 1, characterized in that: The oil scraper feeding system is fixedly installed on the transverse seat. The oil scraper feeding system includes a feeder and a slide. The inlet section of the slide is connected to the outlet of the feeder, and the outlet section of the slide is connected to the lifting seat and connected to the feeder block.

4. The automatic oil scraping device for the inner wall of rolled steel pipe according to claim 1, characterized in that: The transfer mechanism also includes a feeding rod, which is mounted on the base of the transfer mechanism and connected to the lifting support frame.

5. The automatic oil scraping device for the inner wall of the rolled steel pipe according to claim 4, characterized in that: The transfer mechanism also includes a material collection rack, which is fixedly mounted on the base of the transfer mechanism and connected to the material discharge rod.

6. The automatic oil scraping device for the inner wall of the rolled steel pipe according to claim 4, characterized in that: The feeding rod is rotatably mounted on the base of the transfer mechanism via a rotating mechanism.

7. The automatic oil scraping device for the inner wall of rolled steel pipe according to claim 6, characterized in that: The rotating mechanism includes a rotating swing arm and a rotating swing arm rotation mechanism. The feeding rod is fixed on the rotating swing arm, and the rotating swing arm is rotatably mounted on the base of the transfer mechanism through the rotating swing arm rotation mechanism.

8. The automatic oil scraping device for the inner wall of rolled steel pipe according to claim 1, characterized in that: The lower end of the connector box is provided with a flip cover.

9. The automatic oil scraping device for the inner wall of rolled steel pipe according to claim 1, characterized in that: The receiving trolley also includes a waste collection box, which is mounted on the trolley bracket and located below the receiving box.

10. A method for operating the automatic oil scraping device for the inner wall of a rolled steel pipe according to any one of claims 1-9, characterized in that: Includes the following steps: (a) Steel pipe feeding, including the following steps: (1) The rolled steel pipe is placed on the loading bar and slides down from the loading bar onto the lifting support frame; (2) The lifting support frame drives the steel pipe to rise to the plugging station; (3) The clamping lifting mechanism drives the clamping fixture to rise, and the clamping fixture clamps the steel pipe; (ii) Pipe plugging, including the following steps: (1) The trolley support moves on the base of the transfer mechanism through the trolley moving mechanism, and puts the tail of the steel pipe into the receiving box; (2) The transverse moving mechanism drives the transverse moving seat to move towards the steel pipe on the base of the plugging mechanism, while the lifting moving mechanism drives the lifting seat to rise and fall on the transverse moving seat, so that the head of the steel pipe enters the centering mechanism. (3) The centering mechanism centers the head of the steel pipe; (4) The transverse moving mechanism continues to drive the transverse moving seat to move, so that the head of the steel pipe is inserted into the steel pipe interface and the sealing ring; (5) The oil scraper feeding system delivers the oil scraper to the feeder block; the feeder block lifting mechanism drives the feeder block to rise, and the feeder block lifts the oil scraper to the plugging position; (6) The push rod moving mechanism drives the push rod mechanism base plate to move forward on the lifting seat. The push rod mechanism base plate drives the push rod to move forward. After the push rod pushes the oil scraper plug into the push rod interface, it gradually pushes it into the steel pipe until the sealing block fits with the sealing joint. (7) Compressed air enters the push rod through the compressed air interface and is then ejected through the air outlet. The oil scraper inside the steel pipe is ejected from the tail end of the steel pipe under the action of compressed air. The rolling oil and oil scraper inside the steel pipe fall into the plug box, completing the plugging process.

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