Seamless steel tube continuous mill

Abstract

The seamless steel pipe continuous mill comprises a first steel rolling assembly, a second steel rolling assembly is installed on one side of the first steel rolling assembly, the first steel rolling assembly comprises a single-groove roller, shaft columns are fixedly connected to the two sides of the single-groove roller, and transmission gears are fixedly connected to the outer walls of the shaft columns; the outer wall of the shaft column is rotationally connected with a first limiting sliding plate. According to the seamless steel tube continuous mill, when entering the continuous mill, a seamless steel tube is rolled for multiple times through the first steel rolling assembly, the second steel rolling assembly and the third steel rolling assembly, so that rolling passes are increased, the diameter and the wall thickness of the seamless steel tube are gradually reduced, and the seamless steel tube is prevented from being excessively pressed at a time; meanwhile, the first steel rolling assembly, the second steel rolling assembly and the third steel rolling assembly are driven by the hydraulic push rod to move left and right, the contact duration of rollers and seamless steel pipes is conveniently prolonged during rolling, the size precision and the surface smoothness are improved, and the seamless steel pipe machining quality of the seamless steel pipe continuous mill is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of seamless steel pipes, in particular to a seamless steel pipe continuous rolling mill. Background Art

[0002] Seamless steel pipe is made by perforating a whole round steel. The steel pipe with no weld on the surface is called seamless steel pipe. In the processing of seamless steel pipe, the tube blank is sent to the heating furnace for heating, and then perforated on the perforator. It keeps rotating and moving forward while perforating. Under the action of the rollers and the mandrel, a cavity is gradually formed inside the tube blank. Then it is sent to the automatic tube rolling machine for further rolling. Finally, it is processed by a reeling machine to adjust the wall thickness, and then it is processed by a sizing mill to determine the size to meet the specification requirements.

[0003] A continuous rolling mill is required for rolling seamless steel pipes, but the existing continuous rolling mills still have some defects when in use. The commonly used continuous rolling mills usually roll the steel pipes at one time through the same rolling rollers, so that the steel pipes entering the rolling mill are subjected to a large pressure at one time during extrusion rolling. After rolling, the steel pipes will have insufficient precision and an unsmooth surface, which will affect the production quality of the seamless steel pipes. Therefore, it is necessary to propose a continuous rolling mill for seamless steel pipes. Summary of the invention

[0004] The object of the present invention is to provide a seamless steel pipe continuous rolling mill to solve the problem in the above background technology that one-time rolling of steel pipes affects the accuracy and surface smoothness of seamless steel pipes.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a seamless steel pipe continuous rolling mill, comprising a rolling assembly 1, a rolling assembly 2 is installed on one side of the rolling assembly 1, and the rolling assembly 1 includes a single-groove roller, and both sides of the single-groove roller are fixedly connected with a shaft column, the outer wall of the shaft column is fixedly connected with a transmission gear, and the outer wall of the shaft column is rotatably connected to a limiting slide plate 1, a rolling assembly 3 is installed on one side of the rolling assembly 2, and the rolling assembly 3 includes a multi-groove roller, both sides of the multi-groove roller are fixedly connected with a shaft rod, and the outer wall of the shaft rod is fixedly connected to a limiting cylinder, a rotating cylinder is movably installed on the outside of the limiting cylinder, and the outer wall of the rotating cylinder is rotatably connected to the limiting slide plate 2;

[0006] The outer wall of one end of the shaft rod is fixedly connected with a moving gear, and a short tooth plate is meshed with the bottom of the moving gear, one side of the limiting slide plate 2 is movably connected with a short limiting plate, and the bottom of the transmission gear is meshed with a long tooth plate, one side of the limiting slide plate 1 is movably connected with a long limiting plate, and a connecting frame is welded on the top of the limiting slide plate 1, a sliding bar is welded on the top of the connecting frame, and the outer wall of the sliding bar is movably connected with a fixed shell, a hydraulic push rod is fixedly installed on the top of the fixed shell, and a positioning assembly is installed on one side of the fixed shell.

[0007] Preferably, the limiting slide plate 1 is symmetrically arranged on both sides of the single-groove roller, and the single-groove roller is symmetrically arranged between the limiting slide plate 1, a roller is installed inside the limiting slide plate 1, and the limiting slide plate 1 is moved by the roller and arranged on one side of the long limiting plate, and the long limiting plate and the long tooth plate are both fixedly installed on the inner wall of the fixed shell.

[0008] Preferably, the internal structure of the steel rolling component 2 is arranged in the same manner as the internal structure of the steel rolling component 1, and the steel rolling component 1 is fixedly connected to the steel rolling component 2 through a connecting frame and a sliding bar, and the steel rolling component 1 and the steel rolling component 2 are both movably arranged between the long limit plates.

[0009] Preferably, the multi-groove roller is symmetrically arranged between the two limiting slides, the outer wall of the limiting cylinder is provided with a clamping strip, and the inner wall of the rotating cylinder is provided with a groove, the rotating cylinder is rotatably installed inside the two limiting slides through a bearing, and the inside of the two limiting slides is provided with a roller, and the two limiting slides are movably connected to the short limiting plate through the roller.

[0010] Preferably, the short limit plate and the short tooth plate are fixedly mounted on the inner wall of the fixed shell, and a moving opening is opened in the fixed shell at the position corresponding to the moving gear, the groove side cuts of the multi-groove roller and the single-groove roller are both semicircular structures, and the groove aperture of the single-groove roller is larger than the groove aperture of the shaft column, which is larger than the groove hole of the multi-groove roller, and the multiple groove aperture sizes of the multi-groove roller decrease successively.

[0011] Preferably, a push plate is fixedly connected to the top of the slide bar, and one end of the telescopic rod of the hydraulic push rod is fixedly connected to the push plate, a strip hole is opened in the fixed shell corresponding to the position of the slide bar, and the positioning assembly includes a handle, baffles are fixedly connected on both sides of the handle, and a splint is welded to the bottom of the handle.

[0012] Preferably, a positioning groove is provided on the top of the fixed shell, and a slide groove is provided at equal distances on one side of the positioning groove, a card slot is provided on the top of the positioning groove, and a card plate is inserted into the inside of the card slot, the clamping plate is arranged on the top outer side of the multi-groove roller, and the handle is movably arranged on the inner side of the slide groove, and an indicator mark is provided on one side of the slide groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the seamless steel pipe continuous rolling mill;

[0014] 1. When the seamless steel pipe enters the continuous rolling mill, it will be rolled multiple times through rolling assembly 1, rolling assembly 2 and rolling assembly 3, thereby increasing the number of rolling passes and gradually reducing the diameter and wall thickness of the steel pipe, thereby avoiding excessive pressure on the seamless steel pipe at one time. At the same time, the hydraulic push rod drives the rolling assembly 1, rolling assembly 2 and rolling assembly 3 to move left and right, which is convenient for increasing the contact time between the roller and the seamless steel pipe during rolling, improving the dimensional accuracy and surface finish, and ensuring the quality of the seamless steel pipe processed by the seamless steel pipe continuous rolling mill;

[0015] 2. Through the setting of the adjustment component, when using the rolling component three, by moving the handle, the multi-groove roller can be conveniently moved left and right, so that the grooves of different sizes of the multi-groove roller can be aligned with the rolling component one and the rolling component two for use, thereby facilitating the processing of seamless steel pipes of various diameters according to needs, thereby improving the applicability of the seamless steel pipe continuous rolling mill and increasing the use value of the seamless steel pipe continuous rolling mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the position adjustment component of the present invention;

[0018] Figure 3 This is a schematic structural diagram of a steel rolling assembly according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of the steel rolling assembly three of the present invention;

[0020] Figure 5 It is a schematic diagram of the side cut splitting structure of the steel rolling component three of the present invention.

[0021] In the figure: 1. Steel rolling component one; 11. Single-groove roller; 12. Shaft column; 13. Transmission gear; 14. Limit slide plate one; 2. Steel rolling component two; 3. Steel rolling component three; 31. Multi-groove roller; 32. Shaft rod; 33. Limit cylinder; 34. Rotating cylinder; 35. Limit slide plate two; 36. Moving gear; 37. Short tooth plate; 38. Short limit plate; 4. Long tooth plate; 5. Long limit plate; 6. Connecting frame; 7. Slide bar; 8. Fixed shell; 9. Hydraulic push rod; 10. Adjustment component; 101. Handle; 102. Baffle; 103. Clamp; 104. Adjustment groove; 105. Slide groove; 106. Card groove; 107. Card plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1:

[0024] See also Figure 1-5The present invention provides a technical solution: a seamless steel pipe continuous rolling mill, comprising a rolling assembly 1, a rolling assembly 2 is installed on one side of the rolling assembly 1, and the rolling assembly 1 comprises a single groove roller 11, and both sides of the single groove roller 11 are fixedly connected with a shaft column 12, the outer wall of the shaft column 12 is fixedly connected with a transmission gear 13, and the outer wall of the shaft column 12 is rotatably connected with a limiting slide plate 14, the limiting slide plate 14 is symmetrically arranged on both sides of the single groove roller 11, and the single groove roller 11 is symmetrically arranged between the limiting slide plates 14, and the inner part of the limiting slide plate 14 is installed with a roller Wheel, and the limiting slide plate 14 is set on one side of the long limiting plate 5 through the roller movement, the long limiting plate 5 and the long tooth plate 4 are fixedly installed on the inner wall of the fixed shell 8, the steel rolling component 1 and the steel rolling component 2 share the long tooth plate 4 and the long limiting plate 5, and then when the steel rolling component 1 and the steel rolling component 2 are moved, the long limiting plate 5 is used to limit, and the single-groove roller 11 and the roller inside the steel rolling component 2 are driven to rotate through the long tooth plate 4, so as to facilitate the rolling of the outside of the steel pipe. A steel rolling component 3 3 is installed on one side of the steel rolling component 2, and the steel rolling component 3 3 includes a multi-groove roller 31, both sides of the multi-grooved roller 31 are fixedly connected with a shaft 32, and the outer wall of the shaft 32 is fixedly connected with a limiting cylinder 33, a rotating cylinder 34 is movably installed outside the limiting cylinder 33, and the outer wall of the rotating cylinder 34 is rotatably connected with a limiting slide plate 2 35, one end of the shaft 32 is fixedly connected with a moving gear 36, and the bottom of the moving gear 36 is meshed with a short tooth plate 37, and one side of the limiting slide plate 2 35 is movably connected with a short limiting plate 38, the multi-grooved roller 31 is symmetrically arranged between the limiting slide plates 2 35, the outer wall of the limiting cylinder 33 is provided with a card strip, and the rotating cylinder 34 is rotatably connected with a moving gear 36. The inner wall of the cylinder 33 is provided with a groove, and the arrangement of the limiting cylinder 33 and the rotating cylinder 34 is convenient for limiting the shaft rod 32. When the multi-grooved roller 31 moves left and right to adjust the position, the limiting cylinder 33 moves inside the rotating cylinder 34, and the moving gear 36 moves on the top of the short tooth plate 37, so that when the hydraulic push rod 9 drives the rolling assembly 3 to move, the multi-grooved roller 31 can be rotated for use. The rotating cylinder 34 is rotatably installed inside the limiting slide plate 2 35 through a bearing, and a roller is installed inside the limiting slide plate 2 35, and the limiting slide plate 2 35 is movably connected to the short limiting plate 38 through the roller;

[0025] The short limit plate 38 and the short tooth plate 37 are both fixedly mounted on the inner wall of the fixed shell 8, and a moving opening is opened at the position of the fixed shell 8 corresponding to the moving gear 36. The groove side cuts of the multi-groove roller 31 and the single-groove roller 11 are both semicircular structures, so that the steel pipe can be rolled into a round tube when the two rollers are used symmetrically, and the groove aperture of the single-groove roller 11 is larger than the groove aperture of the shaft column 12, which is larger than the groove aperture of the multi-groove roller 31. The multiple groove apertures of the multi-groove roller 31 decrease in sequence, so that the steel pipe can be rolled into a round tube. When the pipe enters the rolling mill, the steel pipe is gradually extruded and rolled to increase the rolling accuracy of the steel pipe. The bottom of the transmission gear 13 is meshed with a long tooth plate 4, and one side of the limit slide 14 is movably connected with a long limit plate 5, and the top of the limit slide 14 is welded with a connecting frame 6, and the top of the connecting frame 6 is welded with a slide bar 7. The sides of the rolling assembly 1 and the rolling assembly 2 are fixedly connected by welding strips, and the limit slide 14 of the rolling assembly 2 is fixedly connected with the limit slide 2 35 by welding strips. The fixed connection facilitates the steel rolling component 1, the steel rolling component 2 2 and the steel rolling component 3 to form an integral structure, so that when the hydraulic push rod 9 is pushed and pulled, it can drive the steel rolling component 1, the steel rolling component 2 2 and the steel rolling component 3 3 to be moved and used at the same time. The internal structure of the steel rolling component 2 2 is arranged in the same manner as the internal structure of the steel rolling component 1, and the steel rolling component 1 is fixedly connected to the steel rolling component 2 2 through the connecting frame 6 and the sliding bar 7. The steel rolling component 1 and the steel rolling component 2 2 are both movably arranged between the long limit plates 5, and the outer wall of the sliding bar 7 is movably connected with a fixed shell 8, the top of the fixed shell 8 is fixedly installed with a hydraulic push rod 9, and one side of the fixed shell 8 is installed with a positioning component 10, the top of the sliding bar 7 is fixedly connected with a push plate, and one end of the telescopic rod of the hydraulic push rod 9 is fixedly connected to the push plate, and the fixed shell 8 is provided with a strip hole at the position corresponding to the sliding bar 7. When the hydraulic push rod 9 pushes the steel rolling component 1 for use, the sliding bar 7 moves inside the strip hole of the fixed shell 8, so as to facilitate its limitation;

[0026] The adjustment component 10 includes a handle 101, and baffles 102 are fixedly connected to both sides of the handle 101. The baffles 102 are arranged to limit the handle 101 at the top of the fixed shell 8, and a clamping plate 103 is welded to the bottom of the handle 101. An adjustment groove 104 is provided at the top of the fixed shell 8, and a slide groove 105 is equidistantly provided on one side of the adjustment groove 104. A card slot 106 is provided at the top of the adjustment groove 104, and a card plate 107 is inserted into the inside of the card slot 106. The card plate 107 is arranged to limit the handle 101 after it is moved. The handle 101 is on the side of the adjustment groove 104. When the handle 101 is in the middle of the adjustment groove 104, two clamping plates 107 are used to limit the handle 101 on both sides, so as to facilitate the movement of the handle 101 in the corresponding slide groove 105. The clamping plate 103 is arranged on the outer side of the top of the multi-groove roller 31, so as to facilitate the movement of the multi-groove roller 31 when the handle 101 is moved, and there is a gap between the side of the multi-groove roller 31 and the handle 101, so as not to affect the rotation of the multi-groove roller 31, and the handle 101 is arranged on the inner side of the slide groove 105, and an indicator mark is arranged on one side of the slide groove 105.

[0027] Working principle: When using the seamless steel pipe continuous rolling mill, the perforated seamless steel pipe is pushed into the mill. The seamless steel pipe is first rolled between the single-groove rollers 11, then enters the rollers inside the rolling assembly 2, and finally is rolled by the multi-groove rollers 31, so that the seamless steel pipe is gradually extruded and rolled. While the steel pipe is moved in, the hydraulic push rod 9 drives the slide bar 7 to move forward and backward, so that the rolling assembly 1, the rolling assembly 2 and the rolling assembly 3 move forward and backward at the same time, and the transmission gear 13 moves on the top of the long tooth plate 4, and the transmission gear 13 drives the shaft column 12 and the single-groove roller 11 to rotate, so that the rollers are repeatedly moved outside the steel pipe. Rolling increases the smoothness of the steel pipe surface, and when making steel pipes of different sizes, the multi-groove roller 31 is adjusted in position, the clamping plate 107 is taken out and the handle 101 is moved left and right, and after moving to the corresponding indicator mark, the clamping plate 107 is inserted into the clamping groove 106 on both sides of the baffle 102, so as to limit the handle 101, and then when the steel rolling component three 3 is driven to move back and forth, the handle 101 is slid inside the slide groove 105, so as to facilitate the multi-groove roller 31 to be repeatedly moved and rolled on the outside of the steel pipe, and at the same time, the multi-groove roller 31 is moved to align the rolling grooves of different sizes with the rolling grooves of the single-groove roller 11 and the steel rolling component two 2, so that steel pipes of different sizes are rolled.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seamless steel tube continuous rolling mill, comprising a rolling assembly (1), characterized in that: A rolling assembly 2 (2) is installed on one side of the rolling assembly 1 (1), and the rolling assembly 1 (1) includes a single-groove roller (11), and both sides of the single-groove roller (11) are fixedly connected with a shaft column (12), the outer wall of the shaft column (12) is fixedly connected with a transmission gear (13), and the outer wall of the shaft column (12) is rotatably connected to a limiting slide plate 1 (14), and a rolling assembly 3 (3) is installed on one side of the rolling assembly 2 (2), and the rolling assembly 3 (3) includes a multi-groove roller (31), both sides of the multi-groove roller (31) are fixedly connected with a shaft rod (32), and the outer wall of the shaft rod (32) is fixedly connected to a limiting cylinder (33), a rotating cylinder (34) is movably installed outside the limiting cylinder (33), and the outer wall of the rotating cylinder (34) is rotatably connected to a limiting slide plate 2 (35); The outer wall of one end of the shaft rod (32) is fixedly connected to a moving gear (36), and the bottom of the moving gear (36) is meshed with a short tooth plate (37), one side of the limiting slide plate 2 (35) is movably connected to a short limiting plate (38), the bottom of the transmission gear (13) is meshed with a long tooth plate (4), one side of the limiting slide plate 1 (14) is movably connected to a long limiting plate (5), and the top of the limiting slide plate 1 (14) is welded with a connecting frame (6), the top of the connecting frame (6) is welded with a slide bar (7), and the outer wall of the slide bar (7) is movably connected to a fixed shell (8), the top of the fixed shell (8) is fixedly installed with a hydraulic push rod (9), and one side of the fixed shell (8) is installed with a positioning component (10).

2. A seamless steel tube continuous rolling mill according to claim 1, characterized in that: The limiting slide plate (14) is symmetrically arranged on both sides of the single groove roller (11), and the single groove roller (11) is symmetrically arranged between the limiting slide plate (14), a roller is installed inside the limiting slide plate (14), and the limiting slide plate (14) is moved by the roller to be arranged on one side of the long limiting plate (5), and the long limiting plate (5) and the long tooth plate (4) are both fixedly installed on the inner wall of the fixed shell (8).

3. The seamless steel tube continuous rolling mill according to claim 1, characterized in that: The internal structure of the steel rolling component 2 (2) is arranged in the same manner as the internal structure of the steel rolling component 1 (1), and the steel rolling component 1 (1) is fixedly connected to the steel rolling component 2 (2) via a connecting frame (6) and a sliding bar (7), and the steel rolling component 1 (1) and the steel rolling component 2 (2) are both movably arranged between the long limit plates (5).

4. The seamless steel tube continuous rolling mill according to claim 1, characterized in that: The multi-grooved roller (31) is symmetrically arranged between the second limiting slide plate (35), the outer wall of the limiting cylinder (33) is provided with a clamping strip, and the inner wall of the rotating cylinder (34) is provided with a groove, the rotating cylinder (34) is rotatably mounted inside the second limiting slide plate (35) through a bearing, and a roller is installed inside the second limiting slide plate (35), and the second limiting slide plate (35) is movably connected to the short limiting plate (38) through the roller.

5. The seamless steel tube continuous rolling mill according to claim 1, characterized in that: The short limit plate (38) and the short tooth plate (37) are both fixedly mounted on the inner wall of the fixed shell (8), and a moving opening is opened in the fixed shell (8) at a position corresponding to the moving gear (36). The groove side cuts of the multi-groove roller (31) and the single-groove roller (11) are both semicircular structures, and the groove aperture of the single-groove roller (11) is larger than the groove aperture of the shaft column (12) and larger than the groove hole of the multi-groove roller (31). The groove aperture sizes of the multi-groove roller (31) decrease in sequence.

6. The seamless steel tube continuous rolling mill according to claim 1, characterized in that: The top of the slide bar (7) is fixedly connected to a push plate, and one end of the telescopic rod of the hydraulic push rod (9) is fixedly connected to the push plate. The fixed shell (8) is provided with a strip hole at a position corresponding to the slide bar (7). The positioning assembly (10) includes a handle (101), baffles (102) are fixedly connected to both sides of the handle (101), and a clamping plate (103) is welded to the bottom of the handle (101).

7. A seamless steel tube continuous rolling mill according to claim 6, characterized in that: The top of the fixed shell (8) is provided with a positioning groove (104), and a slide groove (105) is equidistantly provided on one side of the positioning groove (104), the top of the positioning groove (104) is provided with a clamping groove (106), and a clamping plate (107) is inserted into the inside of the clamping groove (106), the clamping plate (103) is arranged on the outside of the top of the multi-grooved roller (31), and the handle (101) is movably arranged on the inside of the slide groove (105), and an indicator mark is arranged on one side of the slide groove (105).

Images