Roller device for welding straight-seam steel pipes

Abstract

The application provides a roller device for straight seam steel pipe welding, which comprises a welding assembly, a rolling support assembly, a roller assembly and a cleaning assembly. The cleaning assembly is arranged, the scraper assembly of the cleaning assembly scrapes the surface of the first side roller rotating through, the scraper assembly removes the large and strongly adhered welding slag first, then the surface of the first side roller cleaned by the scraper assembly passes through the brush head assembly, the brush head assembly performs brushing and cleaning, the water sprayed above the inlet of the roller assembly into the pipe flows to the cleaning surface, and the removed welding slag is taken away, so that the roller surface of the first side roller is kept clean, and the roller assembly is prevented from adhering to the welding slag and scratching the surface of the straight seam steel pipe body.

Description

Technical Field

[0001] This invention belongs to the field of straight seam steel pipe welding, and in particular relates to a rolling mill device for welding straight seam steel pipes. Background Technology

[0002] In cold-rolled steel pipe welding production lines, straight seam steel pipes are welded. After welding, weld slag is generated, which adheres to the surface of the steel pipe and the rolling mill rolls. The conventional solution is to clean the steel pipe itself after the weld slag is generated but before it enters the rolling mill: for example, by using brushes or scrapers after the welding point to clean the slag from the pipe surface. However, the cleaning effect may not be thorough, and some weld slag may still be carried into the rolling zone, contaminating the roll surface and causing scratches on the steel pipe. Summary of the Invention

[0003] In view of this, the present invention aims to provide a roller device for welding straight seam steel pipes, so as to solve the technical problem in the prior art that welding slag easily contaminates the roller surface and causes scratches on the steel pipe.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A rolling mill device for welding straight seam steel pipes includes a welding assembly, a rolling support assembly, a rolling mill assembly, and a cleaning assembly. The welding assembly is used to weld a cold-rolled straight seam steel pipe body. The rolling mill assembly is used to continue rolling the welded straight seam steel pipe body. The rolling support assembly is located between the welding assembly and the rolling mill assembly and is used to provide rolling support for the welded straight seam steel pipe body. The cleaning assembly is located at the rolling mill assembly and is used to clean the welding slag adhering to the rolling mill assembly.

[0005] Furthermore, the roll assembly includes a support base, on which two first frames are fixedly connected, and a first lower roll is rotatably connected between the two first frames. Two second frames are also fixedly connected to the support base, and a first upper roll is rotatably connected between the two second frames. Each of the two second frames is also fixedly connected to a pair of connecting seats, which are arranged vertically on the same pair of connecting seats, and a first side roll is rotatably connected between the same pair of connecting seats.

[0006] Furthermore, a ring frame is fixedly connected between the four connecting seats, and the bottom end of the ring frame is fixedly connected to the support base.

[0007] Furthermore, the cleaning assembly includes two sliding platforms, which are slidably inserted into the tops of two connecting seats located below. A connecting frame is rotatably connected to the top of each sliding platform. A scraper assembly is provided at one end of the connecting frame, and a brush head assembly is provided at the other end. A connecting sleeve is fixedly connected to the surface of the connecting frame, and a limit pin is inserted into the connecting sleeve. A first support spring is sleeved on the surface of the limit pin, and both ends of the first support spring are fixedly connected to the limit pin and the connecting sleeve, respectively. Two limit openings are provided on the top of the sliding platform.

[0008] Furthermore, the scraper assembly includes a blade holder, on which an arc-shaped scraper is fixedly connected. The blade holder is also threaded with two plug rods, which are inserted into the end of the connecting frame. A first limiting knob is fixedly connected to the end of each plug rod. A second support spring is sleeved on the surface of each of the two plug rods, and the two ends of the second support spring contact the connecting frame and the blade holder, respectively.

[0009] Furthermore, the brush head assembly includes two connecting rods, which are inserted into the ends of the connecting frame. A connecting plate is sleeved on the surface of the two connecting rods. A second limiting knob is fixedly connected to the ends of the two connecting rods. A first motor is fixedly connected to the connecting plate. A plug shaft is fixedly connected to the output end of the first motor. A plug block is fixedly connected to the plug shaft after it passes through the connecting plate. A fixing seat is threaded to the end of the two connecting rods away from the connecting plate. A third support spring is sleeved on the surface of the connecting rod. The two ends of the third support spring contact the fixing seat and the connecting frame, respectively. A docking shaft is rotatably connected to the fixing seat. A brush head body is fixedly connected to one end of the docking shaft. A docking groove is opened at the other end of the docking shaft, and the docking groove is inserted into the plug block.

[0010] Furthermore, a positioning bolt is rotatably connected to the bottom of the sliding table, and a positioning sleeve is threaded onto the surface of the positioning bolt. The positioning sleeve is fixedly connected to the surface of the connecting seat located below.

[0011] Furthermore, a enclosure body is fixedly connected to the top surface of the connecting seat located below, and a shield is fixedly connected to the top of the sliding table. The contact surface of the shield is adapted to contact the rolling arc surface of the first side roller. A water-drawing space is formed inside the enclosure body, and a drainage channel is formed. A collection box is fixedly connected to the bottom of the sliding platform. The side of the collection box fits into the connecting seat, and the top opening of the collection box is located at the outlet of the drainage channel.

[0012] Furthermore, the welding assembly includes a support frame and a first support base, on which a heating sleeve is fixedly installed. The heating sleeve is used to be fitted over the outside of the straight seam steel pipe body. Two second side rollers are rotatably connected to the first support base, and a third frame is fixedly connected to the top of the first support base. A second upper roller is rotatably connected to the top of the third frame.

[0013] Furthermore, the rolling support assembly includes a second support seat located between the first support seat and the support base, and two support rollers are rotatably connected to the top of the second support seat.

[0014] Compared with the prior art, the rolling mill device for welding straight seam steel pipes described in this invention has the following advantages: (1) By setting up a cleaning component, the scraper component of the cleaning component will scrape the surface of the first side roller that rotates through it. The scraper component first removes large pieces of welding slag with strong adhesion. Then, the surface of the first side roller after being cleaned by the scraper component will pass through the brush head component. The brush head component will brush and clean it. The water sprayed above the pipe inlet of the roller component will flow to the cleaning surface and carry away the welding slag that has been cleaned. This is beneficial to keeping the roller pressing surface of the first side roller clean and to avoiding the roller component from sticking welding slag and causing scratches on the surface of the straight seam steel pipe.

[0015] (2) During the installation process, the limiting pin is first inserted into one of the limiting ports to restrict the state of the connecting frame, so that the scraper assembly and brush head assembly on the connecting frame are in a relatively static state with the sliding table. After the sliding table is slidably inserted into the top of the connecting seat, the positioning bolt and the positioning screw are threadedly connected, so that the scraper assembly and brush head assembly will be attached to the rolling surface of the first side roller. Under the limitation of the limiting pin, the scraper assembly and brush head assembly are positioned in an orientation that can be attached to the rolling surface of the first side roller. This achieves that after the sliding table is installed on the connecting seat, the scraper assembly and brush head assembly can be attached to the rolling surface of the first side roller without adjustment.

[0016] (3) The connecting frame can be rotated and positioned by the cooperation of the limiting pin and the limiting port, which makes it easy to maintain the scraper and brush head in an open space without disassembling the sliding table.

[0017] (4) The elastic pressure of the second and third support springs ensures that the scraper and brush head are in contact with the roll surface, adapting to the slight unevenness of the roll surface.

[0018] (5) The shielding cover contacts the rolling surface of the first side roll, which can isolate the space cleaned by the brush head and the arc scraper, and prevent the shielding cover from scraping the water on the surface of the first side roll. The water will carry away the welding slag and flow into the collection box through the drainage channel. The surface of the collection box is connected to the external pipe, which can guide the collected sewage and discharge the sewage away from the first side roll, so as to avoid secondary pollution to the first side roll. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the first overall structure of a straight seam steel pipe welding roll device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the welding assembly, rolling support assembly, roll assembly, and cleaning assembly of a straight seam steel pipe welding roll device according to an embodiment of the present invention: Figure 3 for Figure 2 Enlarged view of section A in the middle; Figure 4 This is a schematic diagram of the first structure of the connecting seat, cleaning assembly, and first side roll of a rolling mill device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the second structure of the connecting seat, cleaning assembly, and first side roll of a rolling mill device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the connecting seat of a roller device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the cleaning assembly of a roller device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the scraper assembly of a roller device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the brush head assembly of a roller device for welding straight seam steel pipes according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the sliding table and shielding cover of a straight seam steel pipe welding roller device according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the roll assembly and cleaning assembly of a straight seam steel pipe welding roll device according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1-Straight seam steel pipe body; 2-Support frame; 3-First support seat; 4-Heating sleeve; 5-Second side roll; 6-Third frame; 7-Second upper roll; 8-Support base; 9-First frame; 10-First lower roll; 11-Second frame; 12-First upper roll; 13-Connecting seat; 14-First side roll; 15-Annular frame; 16-Second support seat; 17-Support roll; 18-Sliding table; 19-Connecting frame; 1901-Connecting shaft; 20-Connecting sleeve; 21-Limiting pin; 22-First support spring; 23-Limiting port ; 24-blade holder; 25-arc scraper; 26-plug rod; 27-first limit knob; 28-second support spring; 29-connecting rod; 30-connecting plate; 31-second limit knob; 32-third support spring; 33-first motor; 34-plug shaft; 35-plug block; 36-fixed seat; 37-connection shaft; 38-brush head body; 39-connection groove; 40-enclosure body; 41-shield; 4101-fitting surface; 42-drainage channel; 43-water intake space; 44-collection box; 45-external pipe; 46-water injection pipe. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 11 As shown, in one embodiment, a roller device for welding straight seam steel pipes includes a welding assembly, a rolling support assembly, a roller assembly, and a cleaning assembly. The welding assembly is used to weld the cold-rolled straight seam steel pipe body 1. The roller assembly is used to continue rolling the welded straight seam steel pipe body 1. The rolling support assembly is located between the welding assembly and the roller assembly and is used to provide rolling support for the welded straight seam steel pipe body 1. The cleaning assembly is located at the roller assembly and is used to clean the welding slag adhering to the roller assembly.

[0026] The welding assembly includes a support frame 2 and a first support base 3. A heating sleeve 4 is fixedly installed on the support frame 2 and is used to fit over the outside of the straight seam steel pipe body 1. Two second side rollers 5 are rotatably connected to the first support base 3. A third frame 6 is fixedly connected to the top of the first support base 3, and a second upper roller 7 is rotatably connected to the top of the third frame 6. It should be understood that the straight seam steel pipe body 1, after being rolled and formed, passes through the heating sleeve 4. After being heated, the seam edge of the straight seam steel pipe body 1 will be melted. Under the rolling pressure of the two second side rollers 5 and the second upper roller 7, mechanical pressure is applied to complete the welding and form a weld.

[0027] The roll assembly includes a support base 8, on which two first frames 9 are fixedly connected. A first lower roll 10 is rotatably connected between the two first frames 9. Two second frames 11 are also fixedly connected to the support base 8, on which a first upper roll 12 is rotatably connected. Each of the two second frames 11 is also fixedly connected to a pair of connecting seats 13, arranged vertically. A first side roll 14 is rotatably connected between the two connecting seats 13. It should be understood that after welding, the straight seam steel pipe 1 will be rolled again by the roll assembly. The first upper roll 12 and the first lower roll 10 roll the top and bottom of the straight seam steel pipe 1, while the two first side rolls 14 roll the sides of the straight seam steel pipe 1. During the rolling process, water is sprayed from the inlet of the roll assembly. The welding slag adhering to the surface of the straight seam steel pipe 1 will slide down the surface of the straight seam steel pipe 1 onto the rolling surface of the two first side rolls 14 under the influence of the water.

[0028] A ring frame 15 is fixedly connected between the four connecting seats 13, and the bottom end of the ring frame 15 is fixedly connected to the support base 8. It should be understood that by setting the ring frame 15, the connecting seats 13 are supported.

[0029] The rolling support assembly includes a second support seat 16, which is located between the first support seat 3 and the support base 8. Two support rollers 17 are rotatably connected to the top of the second support seat 16. It should be understood that after welding, there will be a distance between the straight seam steel pipe body 1 and the welding assembly and the roller assembly. The two support rollers 17 can support the straight seam steel pipe body 1 that has just been welded, which is beneficial for the stable conveying of the welded straight seam steel pipe body 1.

[0030] The cleaning assembly includes two sliding platforms 18, which are slidably inserted into the top of two connecting seats 13 located below. A connecting frame 19 is rotatably connected to the top of the sliding platform 18. A scraper assembly is provided at one end of the connecting frame 19, and a brush head assembly is provided at the other end of the connecting frame 19. A connecting sleeve 20 is fixedly connected to the surface of the connecting frame 19. A limit pin 21 is inserted into the connecting sleeve 20. A first support spring 22 is sleeved on the surface of the limit pin 21. The two ends of the first support spring 22 are fixedly connected to the limit pin 21 and the connecting sleeve 20, respectively. Two limit openings 23 are opened on the top of the sliding platform 18.

[0031] The bottom of the sliding table 18 is rotatably connected to a positioning bolt 1801, and a positioning sleeve 1802 is threaded onto the surface of the positioning bolt 1801. The positioning sleeve 1802 is fixedly connected to the surface of the connecting seat 13 located below.

[0032] It should be understood that during the process of the welded straight seam steel pipe 1 passing through the rolling assembly, the welding slag on the straight seam steel pipe 1 will fall along the side wall of the straight seam steel pipe 1 onto the rolling surface of the two first side rolling rolls 14 under the flushing of water, causing welding slag to stick to the rolling surface of the first side rolling rolls 14. During the rolling process, it will cause scratches on the surface of the straight seam steel pipe 1. This embodiment can solve the above problem. The specific solution is as follows: by setting a cleaning assembly, the scraper assembly of the cleaning assembly will scrape the surface of the rotating first side rolling roll 14. The scraper assembly first removes large pieces of welding slag with strong adhesion. Then, the surface of the first side rolling roll 14 after being cleaned by the scraper assembly will pass through the brush assembly. The brush assembly will perform brush cleaning. The water sprayed above the pipe inlet of the rolling assembly will flow to the cleaning surface and carry away the cleaned welding slag, which is conducive to keeping the rolling surface of the first side rolling roll 14 clean and to avoiding the rolling assembly from sticking welding slag and causing scratches on the surface of the straight seam steel pipe 1.

[0033] During installation, the limiting pin 21 is first inserted into one of the limiting ports 23 to restrict the state of the connecting frame 19, so that the scraper assembly and brush head assembly on the connecting frame 19 are in a relatively stationary state with the sliding table 18. After the sliding table 18 is slidably inserted into the top of the connecting seat 13, the positioning bolt 1801 and the positioning sleeve 1802 are threadedly connected, so that the scraper assembly and brush head assembly will be attached to the rolling surface of the first side roller 14. Under the limitation of the limiting pin 21, the scraper assembly and brush head assembly are positioned to be in the direction that can be attached to the rolling surface of the first side roller 14. This achieves that after the sliding table 18 is installed on the connecting seat 13, the scraper assembly and brush head assembly can be attached to the rolling surface of the first side roller 14 without adjustment. When maintenance of the brush head assembly and scraper assembly is required, rotate the positioning bolt 1801 to move the sliding table 18, which in turn moves the connecting frame 19, scraper assembly, and brush head assembly, creating a distance between the scraper assembly and brush head assembly and the surface of the first side roller 14. Pull up the limit pin 21 to remove the limit on the connecting frame 19, and then rotate the connecting frame 19 so that the scraper assembly and brush head assembly face the open space. Insert the limit pin 21 into another limit port 23 to fix the position of the connecting frame 19, scraper assembly, and brush head assembly relative to the sliding table 18. The scraper assembly and brush head assembly can be cleaned and maintained in the open space without removing the sliding table 18. After cleaning and maintaining the scraper assembly and brush head assembly, pull up the limit pin 21 to remove the limit, rotate the connecting frame 19 so that the scraper assembly and brush head assembly return to the direction facing the first side roller 14, and insert the limit pin 21 into the limit port 23.

[0034] Specifically, a connecting shaft 1901 is rotatably connected to the surface of the connecting frame 19, and the connecting shaft 1901 is fixedly connected to the top of the sliding table 18.

[0035] like Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9As shown, in one embodiment, the scraper assembly includes a scraper holder 24, on which an arc-shaped scraper 25 is fixedly connected. Two plug-in rods 26 are also threaded onto the scraper holder 24. The two plug-in rods 26 are inserted into the ends of the connecting frame 19. A first limiting knob 27 is fixedly connected to the ends of the plug-in rods 26. Second support springs 28 are sleeved on the surfaces of both plug-in rods 26. The two ends of the second support springs 28 contact the connecting frame 19 and the scraper holder 24, respectively. By setting up a cleaning assembly, the arc-shaped scraper 25 of the cleaning assembly scrapes away the welding slag adhering to the surface of the rotating first side roller 14, removing large pieces of highly adhesive welding slag first. By setting up the second support springs 28, when the arc-shaped scraper 25 presses against the rolling surface of the first side roller 14, the second support springs 28 are compressed, achieving elastic pressure.

[0036] The brush head assembly includes two connecting rods 29, which are inserted into the ends of the connecting frame 19. A connecting plate 30 is sleeved on the surface of the two connecting rods 29. A second limit knob 31 is fixedly connected to the end of each of the two connecting rods 29. A first motor 33 is fixedly connected to the connecting plate 30. A plug shaft 34 is fixedly connected to the output end of the first motor 33. A plug block 35 is fixedly connected to the plug shaft 34 after passing through the connecting plate 30. A fixed seat 36 is threaded to the end of the two connecting rods 29 away from the connecting plate 30. A third support spring 32 is sleeved on the surface of the connecting rods 29. The two ends of the third support spring 32 are in contact with the fixed seat 36 and the connecting frame 19, respectively. A docking shaft 37 is rotatably connected to the fixed seat 36. A brush head body 38 is fixedly connected to one end of the docking shaft 37. A docking groove 39 is opened at the other end of the docking shaft 37 and is inserted into the plug block 35. During the brushing process, the first motor 33 is started, which drives the insertion shaft 34 to rotate. The insertion shaft 34 drives the docking shaft 37 to rotate through the insertion block 35, which in turn drives the brush head body 38 to rotate, brushing the roller pressing surface of the first side roller 14. By setting the third support spring 32, when the brush head body 38 presses against the roller pressing surface of the first side roller 14, the third support spring 32 will be compressed, realizing elastic pressure.

[0037] It should be understood that after the connecting frame 19 is rotated and then limited, the connecting frame 19 supports the brush head assembly and the scraper assembly towards the open space. Then, when the blade needs to be replaced, the first limit knob 27 can be rotated directly to disconnect the threaded connection between the plug rod 26 and the blade holder 24, so that the blade holder 24 and the blade can be removed. Then, a new blade holder 24 and a new blade can be installed, so that the new blade holder 24 is threadedly connected to the plug rod 26. The scraper assembly connected to the first side roller 14 can be disassembled and replaced. When the brush head needs to be replaced, rotate the second limit knob 31 to disconnect the threaded connection between the connecting rod 29 and the fixed seat 36. Then, the fixed seat 36, the docking shaft 37, and the brush head body 38 can be removed. The new fixed seat 36 is then threadedly connected to the connecting rod 29, allowing the new fixed seat 36, the docking shaft 37, and the brush head body 38 to be installed. During the installation process, the plug block 35 is aligned with the docking groove 39 to connect the docking shaft 37 with the plug shaft 34 of the motor.

[0038] like Figure 4 , Figure 5 , Figure 10 and Figure 11 As shown, in one embodiment, a barrier body 40 is fixedly connected to the top surface of the lower connecting seat 13, and a shield 41 is fixedly connected to the top of the sliding table 18. The contact surface 4101 of the shield 41 is adapted to contact the rolling arc surface of the first side roller 14. A water-guiding space 43 is formed inside the barrier body 40, and a drainage channel 42 is formed. A collection box 44 is fixedly connected to the bottom of the sliding table 18. The side of the collection box 44 fits against the connecting seat 13, and the top opening of the collection box 44 is located at the outlet of the drainage channel 42.

[0039] It should be understood that the shield 41 contacts the rolling surface of the first side roller 14, which can block the space cleaned by the brush head body 38 and the arc scraper 25. The shield 41 scrapes the water on the surface of the first side roller 14, and the water will carry away the welding slag and flow into the collection box 44 through the drainage channel 42. Specifically, an external pipe 45 is connected to the surface of the collection box 44, which can guide the collected sewage and discharge it away from the first side roller 14 to avoid secondary pollution to the first side roller 14.

[0040] A water injection pipe 46 is installed diagonally above the roll assembly to rinse the surface of the roll assembly and the straight seam steel pipe body 1. Water is sprayed onto the surface of the straight seam steel pipe body through the water injection pipe 46 located above the inlet of the roll assembly. The water flows along the surface of the straight seam steel pipe body 1 to the cleaning surface of the first side roll 14, carrying away the welding slag. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rolling mill device for welding straight seam steel pipes, characterized in that: The assembly includes a welding component, a rolling support component, a roll assembly, and a cleaning component. The welding component is used to weld the cold-rolled straight seam steel pipe body (1). The roll assembly is used to continue rolling the welded straight seam steel pipe body (1). The rolling support component is located between the welding component and the roll assembly and is used to provide rolling support for the welded straight seam steel pipe body (1). The cleaning component is located at the roll assembly and is used to clean the welding slag adhering to the roll assembly. The roll assembly includes a support base (8), on which two first frames (9) are fixedly connected. A first lower roll (10) is rotatably connected between the two first frames (9). Two second frames (11) are also fixedly connected to the support base (8). A first upper roll (12) is rotatably connected between the two second frames (11). A pair of connecting seats (13) are also fixedly connected to each of the two second frames (11). The two connecting seats (13) are arranged vertically on the same pair. A first side roll (14) is rotatably connected between the two connecting seats (13). A ring frame (15) is fixedly connected between the four connecting seats (13), and the bottom end of the ring frame (15) is fixedly connected to the support base (8). The cleaning assembly includes two sliding platforms (18), which are slidably inserted into the top of two connecting seats (13) located below. A connecting frame (19) is rotatably connected to the top of the sliding platform (18). A scraper assembly is provided at one end of the connecting frame (19), and a brush head assembly is provided at the other end of the connecting frame (19). A connecting sleeve (20) is fixedly connected to the surface of the connecting frame (19). A limiting pin (21) is inserted into the connecting sleeve (20). A first support spring (22) is sleeved on the surface of the limiting pin (21). The two ends of the first support spring (22) are fixedly connected to the limiting pin (21) and the connecting sleeve (20) respectively. Two limiting ports (23) are opened on the top of the sliding platform (18).

2. The rolling mill device for welding straight seam steel pipes according to claim 1, characterized in that: The scraper assembly includes a blade holder (24), on which an arc-shaped scraper (25) is fixedly connected. Two plug rods (26) are also threadedly connected to the blade holder (24). The two plug rods (26) are inserted into the end of the connecting frame (19). A first limiting knob (27) is fixedly connected to the end of the plug rod (26). A second support spring (28) is sleeved on the surface of each of the two plug rods (26). The two ends of the second support spring (28) are in contact with the connecting frame (19) and the blade holder (24) respectively.

3. The rolling mill device for welding straight seam steel pipes according to claim 1, characterized in that: The brush head assembly includes two connecting rods (29), which are inserted into the ends of the connecting frame (19). A connecting plate (30) is sleeved on the surface of each connecting rod (29). A second limiting knob (31) is fixedly connected to the ends of both connecting rods (29). A first motor (33) is fixedly connected to the connecting plate (30). A plug shaft (34) is fixedly connected to the output end of the first motor (33). A plug block (35) is fixedly connected to the plug shaft (34) after it passes through the connecting plate (30). The connecting rod (29) is threaded to a fixed seat (36) at one end away from the connecting plate (30). A third support spring (32) is sleeved on the surface of the connecting rod (29). The two ends of the third support spring (32) are in contact with the fixed seat (36) and the connecting frame (19) respectively. A docking shaft (37) is rotatably connected to the fixed seat (36). A brush head body (38) is fixedly connected to one end of the docking shaft (37). A docking groove (39) is opened at the other end of the docking shaft (37). The docking groove (39) is inserted into the plug block (35).

4. A rolling mill device for welding straight seam steel pipes according to any one of claims 2 to 3, characterized in that: The bottom of the sliding table (18) is rotatably connected to a positioning bolt (1801), and a positioning sleeve (1802) is threaded onto the surface of the positioning bolt (1801). The positioning sleeve (1802) is fixedly connected to the surface of the connecting seat (13) located below.

5. The rolling mill device for welding straight seam steel pipes according to claim 4, characterized in that: A barrier body (40) is fixedly connected to the top surface of the connecting seat (13) located below, and a shield (41) is fixedly connected to the top of the sliding table (18). The contact surface (4101) of the shield (41) is adapted to contact the rolling arc surface of the first side roller (14). A water-guiding space (43) is formed inside the barrier body (40), and a drainage channel (42) is formed. The bottom of the sliding platform (18) is fixedly connected to a collection box (44), the side of the collection box (44) is in contact with the connecting seat (13), and the top opening of the collection box (44) is located at the outlet of the drainage channel (42).

6. The rolling mill device for welding straight seam steel pipes according to claim 1, characterized in that: The welding assembly includes a support frame (2) and a first support base (3). A heating sleeve (4) is fixedly installed on the support frame (2). The heating sleeve (4) is used to be fitted onto the outside of the straight seam steel pipe body (1). Two second side rollers (5) are rotatably connected to the first support base (3), and a third frame (6) is fixedly connected to the top of the first support base (3). A second upper roller (7) is rotatably connected to the top of the third frame (6).

7. The rolling mill device for welding straight seam steel pipes according to claim 6, characterized in that: The rolling support assembly includes a second support seat (16) located between the first support seat (3) and the support base (8), and two support rollers (17) are rotatably connected to the top of the second support seat (16).

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