Tension reducing preparation process of seamless steel tube

Abstract

The invention discloses a seamless steel pipe tension reducing preparation process which comprises the following steps: S1, reducing a steel pipe: putting a heated steel pipe into a driving equipment frame, and applying pressure on the heated steel pipe by a pressure applying concave wheel; and S2, discharging and cleaning are conducted, specifically, after the diameter-reduced steel pipes fall off, discharging is conducted through a double-slope sliding frame at the top of the bearing bottom plate. According to the seamless steel pipe tension reducing preparation process, an upper pressing top plate is mounted at the tops of a plurality of driving equipment frames through threaded rotary columns, a retraction guide opening is formed in the top of the upper pressing top plate, a guide sliding seat is mounted in the retraction guide opening, and a special-shaped scraping seat is matched for use; the inclined face pressing frame extrudes the bent abutting column so that the special-shaped material scraping base can be inserted into the inner side of the annular guide opening, the special-shaped material scraping base is attached to the inner side of the pressing concave wheel, and the rotating pressing concave wheel is matched with the special-shaped material scraping base to rapidly scrape away steel slag on the inner side of the pressing concave wheel.

Description

Technical Field

[0001] The invention relates to the technical field of seamless steel pipe preparation, in particular to a tension-reducing preparation process for seamless steel pipes. Background Art

[0002] Seamless steel pipe is made of a whole round steel with holes, and there is no weld on the surface. It is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, jacking pipe, etc.

[0003] In the production process of existing seamless steel pipes, the most important process is the final tension reduction process, which makes the steel pipe not only subjected to radial compression but also longitudinal stretching, so as to achieve the effect of reducing diameter and wall. This operation requires the use of special tension reduction equipment. Although the existing equipment can realize the processing of butt-jointed steel pipes, it still has obvious defects in daily use, such as:

[0004] Usually, multiple tension reducing devices need to be set up and arranged in a row to extrude the steel pipe. However, after the steel pipe is extruded, a large amount of steel slag will fall from the surface, resulting in a poor environment at the bottom of the equipment and easy to produce slight fusion, which is inconvenient for subsequent disassembly. At the same time, the surface of the roller inside the equipment is also prone to steel slag. If it is not cleaned, pits will appear on the surface of the steel pipe. At the same time, manual cleaning is cumbersome and inconvenient;

[0005] Therefore, a seamless steel pipe tension reducing preparation process is now designed to solve such defects. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a seamless steel pipe tension reduction preparation process, which solves the problem that steel slag is difficult to clean during tension reduction of the existing seamless steel pipe.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A seamless steel pipe tension reduction preparation process, comprising the following steps:

[0008] S1. Steel pipe diameter reduction: put the heated steel pipe into the driving device frame and let the pressure wheel press it;

[0009] S2. Material discharge and cleaning: After the steel pipe with reduced diameter falls, the double inclined sliding frame on the top of the load-bearing bottom plate is used for material discharge;

[0010] S3, Accessory lifting: Rotate the threaded rotating column and use the upper pressure plate to lower several special-shaped scraper seats;

[0011] S4. Roller cleaning: Insert the special-shaped scraper seat into the inner side of the drive device frame to clean the pressure concave wheel.

[0012] Preferably, the top of the load-bearing base plate is fixedly connected to a driving device frame via a fixing plate, and a plurality of driving device frames are equidistantly arranged, annular guide openings are provided on the surface and rear of the driving device frame, and the bottom and both sides of the inner cavity of the driving device frame are fixedly connected to bending guide columns via fixing plates, and the end of the bending guide column away from the driving device frame is rotatably connected to a pressure cam via a bearing, a motor is fixedly connected between the front and rear of the inner cavity of the driving device frame via a bracket, and three motors are arranged, the output shaft of the motor is fixedly connected to a rotating rod via a coupling, and the end of the rotating rod away from the motor is fixedly connected to a side of the pressure cam adjacent to the motor via a fixing block.

[0013] Preferably, the bottom of the load-bearing base plate is fixedly connected to an electric telescopic rod via a fixing plate, the right end of the electric telescopic rod is fixedly connected to a transverse push plate via a fixing block, a slag bottom trough is provided at the top of the load-bearing base plate and between two adjacent drive device frames, and a plurality of slag bottom troughs are provided, and a rectangular scraping frame used in conjunction with the slag bottom trough is fixedly connected to the left side of the transverse push plate via a fixing plate.

[0014] Preferably, the left side of the top of the load-bearing base plate is rotatably connected to a threaded column via a bearing member, the upper surface of the threaded column is threadedly connected to a threaded sleeve, the right end of the threaded sleeve is fixedly connected to an upper pressure plate via a fixed block, the left side of the drive device frame is fixedly connected to an inner groove guide seat via a fixed block, an L-shaped guide sliding rod is slidably installed on the inner side of the inner groove guide seat, and one end of the L-shaped guide sliding rod is fixedly connected to the upper pressure plate via a fixed block.

[0015] Preferably, a retraction guide port extending through the bottom is provided at the top of the upper pressure top plate, and a plurality of retraction guide ports are provided and respectively located between two adjacent drive device frames, a guide slide seat is slidably installed on the inner side of the retraction guide port, and a curved support column is fixedly connected to the bottom of the guide slide seat, a special-shaped scraper seat used in conjunction with the circular guide port and the pressure concave wheel is fixedly connected to the bottom end of the curved support column, and a special-shaped scraper seat is fixedly connected between the guide slide seat and the inner wall of the retraction guide port.

[0016] Preferably, the top of the horizontal push plate is fixedly connected to a translation push plate via a bracket, the front side of the top of the load-bearing base plate is fixedly connected to a double-slanted sliding frame via a bracket, and the front end of the translation push plate is fixedly connected to a discharge push plate used in conjunction with the double-slanted sliding frame, and the left side of the translation push plate is fixedly connected to an inclined pressure frame used in conjunction with a bent abutment column via a fixed block, and a plurality of inclined pressure frames are provided.

[0017] Beneficial Effects

[0018] The present invention provides a seamless steel pipe tension reduction preparation process. Compared with the existing technology, it has the following beneficial effects:

[0019] (1) The seamless steel pipe tension reduction preparation process uses a threaded rotating column to install an upper pressure plate on the top of several driving device frames, and a retraction guide port is opened on the top of the upper pressure plate to install a guide slide seat, which is used in combination with a special-shaped scraper seat. The arrangement of these structures enables the inclined pressure frame to extrude the bent support column to insert the special-shaped scraper seat into the inner side of the circular guide port after the steel pipe processing is completed, and the special-shaped scraper seat is fit with the inner side of the pressure concave wheel, so that the steel slag on the inner side of the pressure concave wheel can be quickly scraped off by using the rotating pressure concave wheel in combination with the special-shaped scraper seat, which not only facilitates the use of the staff, but also improves the quality of subsequent steel pipe preparation.

[0020] (2) The seamless steel pipe tension reduction preparation process has a slag trough on the top of the load-bearing bottom plate and a rectangular scraper frame on the inner side of the slag trough. The arrangement of these structures can utilize the reciprocating extension and retraction of the electric telescopic rod to drive the rectangular scraper frame to scrape off the steel slag inside the slag trough during the tension reduction process of the steel pipe, thereby facilitating cleaning by the staff and effectively preventing the steel slag from accumulating at the bottom of the equipment and causing impact.

[0021] (3) The seamless steel pipe tension reduction preparation process comprises a double-slope slide frame installed on the front side of the top of the load-bearing bottom plate, and a discharge push plate is arranged at the front end of the translation push plate. The arrangement of these structures can allow the steel pipe to fall on the top of the double-slope slide frame after the steel pipe has completed tension reduction, and then the discharge push plate can be swung left and right to unload the material, without the need for the staff to perform unnecessary operations, which is sufficient for current use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the translation push plate, the material discharging push plate and the inclined surface pressing frame structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the slag bottom trough, threaded rotating column and double-slope sliding frame structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the threaded sleeve plate, the upper pressing top plate and the retracting guide port structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the guide slide seat, spring and special-shaped scraper seat of the present invention;

[0028] Figure 7 It is a cross-sectional view of the frame structure of the driving device of the present invention.

[0029] In the figure: 1. load-bearing bottom plate; 2. driving device frame; 3. circular guide; 4. bent guide column; 5. motor; 6. rotating rod; 7. pressure concave wheel; 8. electric telescopic rod; 9. horizontal push plate; 10. slag bottom trough; 11. rectangular scraper frame; 12. threaded rotating column; 13. threaded sleeve plate; 14. upper pressure top plate; 15. retraction guide; 16. guide slide seat; 17. spring; 18. special-shaped scraper seat; 19. inner groove guide seat; 20. L-shaped guide slide rod; 21. double-bevel slide frame; 22. translation push plate; 23. discharge push plate; 24. inclined pressure frame; 25. bent support column. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-7 The present invention provides a technical solution: a seamless steel pipe tension reduction preparation process, comprising the following steps:

[0032] S1, steel pipe diameter reduction: put the heated steel pipe into the driving device frame 2 and let the pressure concave wheel 7 apply pressure to it;

[0033] S2, material discharge and cleaning: after the steel pipe with reduced diameter falls, the double inclined sliding frame 21 on the top of the load-bearing bottom plate 1 is used for material discharge;

[0034] S3, accessories lifting: rotating the threaded rotating column 12 and using the upper pressing top plate 14 to lower a plurality of special-shaped scraper seats 18;

[0035] S4, roller cleaning: insert the special-shaped scraper seat 18 into the inner side of the driving device frame 2 to clean the pressure concave wheel 7.

[0036] The above-mentioned seamless steel pipe tension reduction preparation process has the following more specific steps:

[0037] S1. Steel pipe diameter reduction: before use, start the motors 5 inside the driving device frames 2, let the rotating rods 6 drive the pressure concave wheels 7 to rotate under the limit of the bending guide column 4, and then put the heated steel pipe into the inner side of the driving device frame 2 from the circular guide opening 3. At this time, the rotating pressure concave wheels 7 clamp the steel pipe and apply pressure to it while driving the steel pipe forward. During the movement, the inner diameter of the steel pipe compressed by the pressure concave wheels 7 is reduced until the steel pipe falls on the top of the double-slope sliding frame 21 and stops;

[0038] S2, discharge cleaning: after the tension reduction of the steel pipe is completed, the electric telescopic rod 8 is started to synchronously pull the horizontal push plate 9 and the translation push plate 22 to move right. When the horizontal push plate 9 and the translation push plate 22 move right, the rectangular scraper frame 11 and the discharge push plate 23 will also be driven to move synchronously. The movement of the discharge push plate 23 will sweep the steel pipe on the top of the double-slope slide frame 21 for discharge. At the same time, the rectangular scraper frame 11 will scrape the steel slag inside the slag bottom trough 10. After the rectangular scraper frame 11 and the discharge push plate 23 are completely moved to the right, there is no need to reset them, and the tension reduction of the next steel pipe is directly carried out. After completion, the electric telescopic rod 8 is started to push the rectangular scraper frame 11 and the discharge push plate 23 to move left and reset, and the steel pipe is pushed out from the top of the double-slope slide frame 21 again. At the same time, the inner side of the slag bottom trough 10 is scraped again by the rectangular scraper frame 11;

[0039] S3, accessories lifting: when it is necessary to clean the pressure concave wheel 7, manually rotate the threaded rotating column 12 to use the inner groove guide seat 19 and the L-shaped guide slide rod 20 to lower the upper pressure top plate 14 to the bottom. At this time, the special-shaped scraper seat 18 and the circular guide opening 3 are at the same height and relative to each other, and then start the electric telescopic rod 8 to push the rectangular scraper frame 11 to move left and reset. After the rectangular scraper frame 11 completely enters the interior of the slag bottom trough 10, the several inclined pressure frames 24 on the surface of the translation push plate 22 will squeeze the bent support column 25, so that the special-shaped scraper seat 18 is inserted into the inner side of the circular guide opening 3 under the limit of the guide slide seat 16, and the edge of the special-shaped scraper seat 18 is also in contact with the inner side of the pressure concave wheel 7;

[0040] S4, roller cleaning: after the special-shaped scraper seat 18 enters the inner side of the circular guide opening 3, several motors 5 are started again to drive the pressure concave wheel 7 to rotate. Since the special-shaped scraper seat 18 fits the inner side of the pressure concave wheel 7, the rotating pressure concave wheel 7 will scrape and clean the steel slag inside through the special-shaped scraper seat 18.

[0041] The above-mentioned seamless steel pipe tension reduction preparation process is implemented by the following structure:

[0042] The top of the load-bearing bottom plate 1 is fixedly connected to a driving device frame 2 through a fixing plate, and a plurality of driving device frames 2 are arranged at equal intervals. A circular guide opening 3 is provided on the surface and rear of the driving device frame 2. The bottom and both sides of the inner cavity of the driving device frame 2 are fixedly connected to a bending guide column 4 through a fixing plate. The end of the bending guide column 4 away from the driving device frame 2 is rotatably connected to a pressure concave wheel 7 through a bearing. A motor 5 is fixedly connected between the front and rear of the inner cavity of the driving device frame 2 through a bracket. The motor 5 is a servo motor, and three motors 5 are arranged. The output shaft of the motor 5 is connected by a coupling. The shaft is fixedly connected with a rotating rod 6, and the end of the rotating rod 6 away from the motor 5 is fixedly connected to one side of the adjacent pressure concave wheel 7 through a fixed block, the bottom of the load-bearing base plate 1 is fixedly connected with an electric telescopic rod 8 through a fixed plate, and the right end of the electric telescopic rod 8 is fixedly connected with a horizontal push plate 9 through a fixed block, and a slag bottom trough 10 is provided at the top of the load-bearing base plate 1 and between two adjacent driving device frames 2, and a plurality of slag bottom troughs 10 are provided, and a rectangular scraper frame 11 used in conjunction with the slag bottom trough 10 is fixedly connected to the left side of the horizontal push plate 9 through a fixed plate.

[0043] Furthermore, the left side of the top of the load-bearing base plate 1 is rotatably connected to a threaded rotating column 12 through a bearing member, the upper part of the surface of the threaded rotating column 12 is threadedly connected to a threaded sleeve 13, the right end of the threaded sleeve 13 is fixedly connected to an upper pressure plate 14 through a fixed block, the left side of the driving device frame 2 is fixedly connected to an inner groove guide seat 19 through a fixed block, an L-shaped guide slide rod 20 is slidably installed on the inner side of the inner groove guide seat 19, and one end of the L-shaped guide slide rod 20 is fixedly connected to the upper pressure plate 14 through a fixed block, the top of the upper pressure plate 14 is provided with a retraction guide opening 15 that runs through to the bottom, and a plurality of retraction guide openings 15 are provided and are respectively located between two adjacent driving device frames 2, a guide slide seat 16 is slidably installed on the inner side of the retraction guide opening 15, and a bent-type resisting column 25 is fixedly connected to the bottom of the guide slide seat 16, and the bottom of the bent-type resisting column 25 is fixedly connected A special-shaped scraper seat 18 is connected to the annular guide port 3 and the pressure concave wheel 7, and the edge side of the special-shaped scraper seat 18 can fit with the inner side of the pressure concave wheel 7 to scrape the residue. The special-shaped scraper seat 18 is fixedly connected between the guide slide seat 16 and the inner wall of the retraction guide port 15. The top of the horizontal push plate 9 is fixedly connected to a translation push plate 22 through a bracket, and the front side of the top of the load-bearing base plate 1 is fixedly connected to a double-bevel slide frame 21 through a bracket, and the front end of the translation push plate 22 is fixedly connected to a discharge push plate 23 used in cooperation with the double-bevel slide frame 21. The left side of the translation push plate 22 is fixedly connected to an inclined pressure frame 24 used in cooperation with the bent anti-column 25 through a fixed block. The inclined pressure frame 24 is usually located between the annular guide port 3 and the bent anti-column 25 and will not cause blockage to the annular guide port 3, and a plurality of inclined pressure frames 24 are provided.

[0044] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A seamless steel pipe tension reduction preparation process, characterized in that: The following steps are involved: S1, steel pipe diameter reduction: the heated steel pipe is placed in the driving device frame (2) and the pressure concave wheel (7) applies pressure to the steel pipe; S2, material discharge and cleaning: after the steel pipe with reduced diameter falls, the double-beveled sliding frame (21) on the top of the load-bearing bottom plate (1) is used for material discharge; S3, lifting of accessories: rotating the threaded rotating column (12) and using the upper pressing top plate (14) to lower a plurality of special-shaped scraper seats (18); S4, roller cleaning: insert the special-shaped scraper seat (18) into the inner side of the driving device frame (2) to clean the pressure concave wheel (7).

2. A seamless steel pipe tension reduction preparation process according to claim 1, characterized in that: The top of the load-bearing base plate (1) is fixedly connected to a driving device frame (2) via a fixing plate, and a plurality of driving device frames (2) are equidistantly arranged. The surface and rear of the driving device frame (2) are provided with circular guide openings (3). The bottom and both sides of the inner cavity of the driving device frame (2) are fixedly connected to bending guide columns (4) via fixing plates. The end of the bending guide column (4) away from the driving device frame (2) is rotatably connected to a pressure cam (7) via a bearing. A motor (5) is fixedly connected between the front and rear of the inner cavity of the driving device frame (2) via a bracket, and three motors (5) are arranged. The output shaft of the motor (5) is fixedly connected to a rotating rod (6) via a coupling, and the end of the rotating rod (6) away from the motor (5) is fixedly connected to one side of the pressure cam (7) via a fixing block.

3. A seamless steel pipe tension reduction preparation process according to claim 2, characterized in that: The bottom of the load-bearing bottom plate (1) is fixedly connected to an electric telescopic rod (8) via a fixing plate, the right end of the electric telescopic rod (8) is fixedly connected to a transverse push plate (9) via a fixing block, a slag bottom groove (10) is provided at the top of the load-bearing bottom plate (1) and between two adjacent drive device frames (2), and a plurality of slag bottom grooves (10) are provided, and a rectangular scraping frame (11) used in conjunction with the slag bottom groove (10) is fixedly connected to the left side of the transverse push plate (9) via a fixing plate.

4. A seamless steel pipe tension reduction preparation process according to claim 3, characterized in that: The left side of the top of the load-bearing base plate (1) is rotatably connected to a threaded rotating column (12) through a bearing member, the upper part of the surface of the threaded rotating column (12) is threadedly connected to a threaded sleeve (13), the right end of the threaded sleeve (13) is fixedly connected to an upper pressure plate (14) through a fixed block, the left side of the driving device frame (2) is fixedly connected to an inner groove guide seat (19) through a fixed block, an L-shaped guide slide rod (20) is slidably installed on the inner side of the inner groove guide seat (19), and one end of the L-shaped guide slide rod (20) is fixedly connected to the upper pressure plate (14) through a fixed block.

5. A seamless steel pipe tension reduction preparation process according to claim 4, characterized in that: The top of the upper pressure top plate (14) is provided with a retraction guide opening (15) extending through to the bottom, and a plurality of retraction guide openings (15) are provided and respectively located between two adjacent drive device frames (2), a guide slide seat (16) is slidably mounted on the inner side of the retraction guide opening (15), and a bent support column (25) is fixedly connected to the bottom of the guide slide seat (16), and a special-shaped scraper seat (18) used in conjunction with the circular guide opening (3) and the pressure concave wheel (7) is fixedly connected to the bottom end of the bent support column (25), and a special-shaped scraper seat (18) is fixedly connected between the guide slide seat (16) and the inner wall of the retraction guide opening (15).

6. A seamless steel pipe tension reduction preparation process according to claim 3, characterized in that: The top of the horizontal push plate (9) is fixedly connected to a translation push plate (22) through a bracket, the front side of the top of the load-bearing bottom plate (1) is fixedly connected to a double-slanted sliding frame (21) through a bracket, and the front end of the translation push plate (22) is fixedly connected to a discharge push plate (23) used in conjunction with the double-slanted sliding frame (21), and the left side of the translation push plate (22) is fixedly connected to an inclined pressure frame (24) used in conjunction with a bent support column (25) through a fixed block, and a plurality of inclined pressure frames (24) are provided.

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