A thick-walled seamless blank steel pipe rolling device

Abstract

The utility model discloses a kind of thick-walled seamless blank steel pipe rolling devices, it includes fixed seat, platform one, rolling machine one, rolling machine two and platform two, the fixed seat right side wall is fixedly connected with hydraulic cylinder, there is push rod in the hydraulic cylinder, the hydraulic cylinder inner wall is slidably connected with push rod outer wall, the push rod right end is fixedly connected push plate;The upper surface of platform two right half portion is slidably connected with the lower bottom of moving platform, the moving platform left side wall is fixedly connected with mandrel, the mandrel inside is provided with mandrel water tank, the mandrel left end is fixedly connected with top head. By the above structure, in rolling process, push plate applies axial thrust to pipe blank tail, the design of conical top head cooperates the bite of roll, improves the rolling effect to pipe blank, after rolling is completed, the water cooling design of mandrel water tank can improve thick-walled steel pipe cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of rolling technology, and in particular to a rolling device for thick-walled seamless blank steel pipes. Background Technology

[0002] There are many technical challenges in the rolling process of thick-walled seamless steel billets. Thick walls mean greater deformation, requiring huge rolling forces, rolling torques and powerful equipment structures.

[0003] However, current rolling mills for thick-walled seamless steel pipe blanks either have insufficient rolling force, resulting in poor rolling effect, or the rolling structure is too complex, making maintenance difficult. After the thick-walled steel pipe is rolled, there is also a problem of long cooling time due to the wall thickness. Utility Model Content

[0004] The purpose of this invention is to provide a rolling device for thick-walled seamless steel billets, which solves the problems of insufficient rolling force and poor rolling effect in the rolling process of thick-walled seamless steel pipes, as well as the problem of long cooling time due to wall thickness.

[0005] To achieve the above objectives, a rolling device for thick-walled seamless billet steel pipe is provided, comprising: a fixed base, a platform one, a rolling mill one, a rolling mill two, and a platform two. A hydraulic cylinder is fixedly connected to the right side wall of the fixed base. A push rod is inside the hydraulic cylinder. The inner wall of the hydraulic cylinder is slidably connected to the outer wall of the push rod. A push plate is fixedly connected to the right end of the push rod. The upper surface of the right half of the platform is slidably connected to the bottom of the moving platform. A mandrel is fixedly connected to the left side wall of the moving platform. A mandrel water groove is opened inside the mandrel. A top head is fixedly connected to the left end of the mandrel.

[0006] According to the aforementioned thick-walled seamless billet steel pipe rolling device, a guide seat is fixedly connected to the upper surface of the right end of the platform, a guide ring is fixedly connected to the side wall of the guide seat, the upper surface of the platform is slidably connected to the lower surface of the billet, and the outer wall of the billet is slidably connected to the inner wall of the guide ring.

[0007] According to the aforementioned thick-walled seamless billet steel pipe rolling device, a first rolling mill is provided with a first rolling roll, the left and right ends of which are rotatably connected to the inner wall of the first rolling mill; a second rolling mill is provided with a second rolling roll, the left and right ends of which are rotatably connected to the inner wall of the second rolling mill.

[0008] According to the thick-walled seamless billet steel pipe rolling device, the upper surface of the second platform is fixedly connected to the lower end of the baffle, and a hole is opened in the middle of the baffle, the inner wall of the hole is slidably connected to the outer wall of the mandrel.

[0009] According to the thick-walled seamless billet steel pipe rolling device, the guide seat has four threaded holes on its side wall, the guide ring has four threaded holes at its four ends, and the guide seat and the guide ring are threadedly connected by screws in the middle.

[0010] According to the thick-walled seamless billet steel pipe rolling device, the left end of the mandrel is conical, and a V-shaped groove is formed on the upper surface of the platform.

[0011] According to the aforementioned thick-walled seamless billet steel pipe rolling device, the right side wall of the mandrel is provided with a mandrel inlet and a mandrel outlet. The right end of the mandrel inlet is fixedly connected to the left end of a water pipe, and the right end of the mandrel outlet is fixedly connected to the left end of a water pipe. The right end of the water pipe is fixedly connected to the left end of the outlet. The outer wall of the right end of the outlet is threadedly connected to the left side wall of the cooling circulation device. The left side wall of the cooling circulation device is provided with a water inlet, and the left end of the water inlet is fixedly connected to the right end of a water pipe. The right side wall of the cooling circulation device is provided with a water inlet and a water outlet.

[0012] According to the thick-walled seamless billet steel pipe rolling device, a filter screen is provided inside the outlet, and the inner wall of the outlet is slidably connected to the side wall of the filter screen.

[0013] The above-mentioned solution has the following beneficial effects: 1. During the rolling process, the pusher plate applies axial thrust to the tail of the tube blank, which, together with the bite of the rolls, increases the rolling force on the tube blank. The design of the conical mandrel also improves the rolling effect. 2. During the cooling stage of thick-walled steel pipes, the water cooling effect of the mandrel water tank in the inner wall of the steel pipe greatly reduces the cooling time and improves production efficiency.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a cross-sectional view of a thick-walled seamless blank steel pipe rolling device according to the present invention; Figure 2 This utility model Figure 1 A magnified view of a section at point A in the middle; Figure 3 This utility model Figure 1 A magnified view of a section at point B in the middle; Figure 4 This utility model Figure 3 A magnified view of the area shown in C; Figure 5This is a side view of a platform of a thick-walled seamless blank steel pipe rolling device according to the present invention; Figure 6 This is a perspective view of the guide seat of a thick-walled seamless blank steel pipe rolling device according to the present invention; Figure 7 This is a perspective view of the baffle of a thick-walled seamless blank steel pipe rolling device according to the present invention.

[0016] Legend: 1. Fixed base; 2. Hydraulic cylinder; 3. Push rod; 4. Push plate; 5. Platform 1; 6. Tube billet; 7. Guide seat; 8. Rolling mill 1; 9. Roll 1; 10. Rolling mill 2; 11. Roll 2; 12. Mandrel; 13. Mandrel water tank; 14. Baffle; 15. Moving table; 16. Platform 2; 17. Mandrel head; 18. Mandrel inlet; 19. Mandrel outlet; 20. Water pipe 1; 21. Water pipe 2; 22. Cooling circulation device; 23. Inlet 1; 24. Outlet 2; 25. Inlet 2; 26. Outlet 1; 27. Filter screen; 28. Guide ring; 29. ​​Screw. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-7 This utility model discloses a rolling device for thick-walled seamless billet steel pipes, comprising: a fixed base 1, a platform 5, a rolling mill 8, a rolling mill 2 10, and a platform 2 16. The device is characterized in that a hydraulic cylinder 2 is fixedly connected to the right side wall of the fixed base 1, and a push rod 3 is located inside the hydraulic cylinder 2. The inner wall of the hydraulic cylinder 2 is slidably connected to the outer wall of the push rod 3, and a push plate 4 is fixedly connected to the right end of the push rod 3. The upper surface of the right half of the platform 2 16 is slidably connected to the lower bottom of a moving platform 15. A mandrel 12 is fixedly connected to the left side wall of the moving platform 15, and a mandrel water groove 13 is provided inside the mandrel 12. A top head 17 is fixedly connected to the left end of the mandrel 12.

[0019] A guide seat 7 is fixedly connected to the upper right surface of platform 5, and a guide ring 28 is fixedly connected to the side wall of guide seat 7. The upper surface of platform 5 is slidably connected to the lower surface of tube blank 6, and the outer wall of tube blank 6 is slidably connected to the inner wall of guide ring 28. Roll 9 is installed inside rolling mill 8, and the left and right ends of roll 9 are rotatably connected to the inner wall of rolling mill 8. Rolling mill 8 is used for the initial rolling of tube blank 6. Roll 11 is installed inside rolling mill 10, and the left and right ends of roll 11 are rotatably connected to the inner wall of rolling mill 10. The inner wall of the rolling mill 210 is rotatably connected, allowing the billet 6 to conform to the required shape. The upper surface of the platform 216 is fixedly connected to the lower end of the baffle 14. A hole is opened in the middle of the baffle 14, and the inner wall of the hole is slidably connected to the outer wall of the mandrel 12. Four threaded holes are opened on the side wall of the guide seat 7, and four threaded holes are opened at the four ends of the guide ring 28. A screw 29 is threadedly connected to the middle of the guide seat 7 and the guide ring 28 to make the structure of the guide ring 28 more stable. The left end of the top head 17 is conical and flat. The upper surface of the mandrel 12 has a V-groove to prevent the tube blank 6 from sliding. The right side wall of the mandrel 12 has a mandrel inlet 18 and a mandrel outlet 19. The right end of the mandrel inlet 18 is fixedly connected to the left end of water pipe 10. The right end of the mandrel outlet 19 is fixedly connected to the left end of water pipe 21. The right end of water pipe 20 is fixedly connected to the left end of outlet 26. The outer wall of the right end of outlet 26 is threadedly connected to the left side wall of the cooling circulation device 22. The cooling circulation device 22... The left side wall has an inlet 23, the left end of which is fixedly connected to the right end of the water pipe 21. The right side wall of the cooling circulation device 22 has an inlet 25 and an outlet 24. The outlet 26 contains a filter screen 27, which can prevent scale and impurities from entering the spindle water tank 13 and avoid affecting the water cooling effect. The inner wall of the outlet 26 is slidably connected to the side wall of the filter screen 27. When necessary, the outlet 26 can be removed to replace and clean the filter screen 27.

[0020] Working principle: The heated tube blank 6 is placed in the V-groove of platform 5. When rolling begins, the moving table 15 moves to the left, and the mandrel 17 at the left end of the mandrel 12 moves to the middle of the rolling mill 8. The hydraulic cylinder 2 operates, the push rod 3 moves to the right, and the push plate 4 pushes the tube blank 6. The tube blank 6 passes through the guide ring 28 and approaches the rolling mill 8. The rolling mill 8 starts working. The push plate 4, mandrel 17, mandrel 12, and roll 9 cooperate to perform preliminary piercing rolling on the tube blank 6. The push plate 4 applies axial thrust to the tail of the tube blank 6, which, combined with the bite of the roll 9, increases the rolling force on the tube blank 6. The conical design of the mandrel 17 also improves the rolling effect. The rolling mill 10 operates, and the cooperation of the roll 11 and mandrel 12 ensures that the various parameters of the tube blank 6 meet the requirements. The rolling process is complete. When the rolling mill 18 and rolling mill 210 stop working, the tube blank 6 enters the cooling stage. The cooling circulation device 22 works, and water flows in from the inlet 25 and enters the cooling circulation device 22 for cooling. It flows out from the outlet 26. The filter screen 27 in the outlet 26 can effectively block scale and impurities. Water flows through the water pipe 20 into the mandrel inlet 18 and into the mandrel water tank 13. It flows out from the mandrel outlet 19. Water flows through the water pipe 21 into the inlet 23 and into the cooling circulation device 22. It flows out from the outlet 24. The water cooling circulation in the mandrel water tank 13 can effectively improve the cooling effect of the tube blank 6. After the tube blank 6 is cooled, the moving table 15 moves to the right. Due to the cooperation of the baffle 14, the mandrel 12 is pulled out from the tube blank 6.

[0021] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rolling apparatus for thick-walled seamless billet steel pipes, comprising: The fixed base (1), platform one (5), rolling mill one (8), rolling mill two (10) and platform two (16) are characterized in that a hydraulic cylinder (2) is fixedly connected to the right side wall of the fixed base (1), a push rod (3) is inside the hydraulic cylinder (2), the inner wall of the hydraulic cylinder (2) is slidably connected to the outer wall of the push rod (3), and a push plate (4) is fixedly connected to the right end of the push rod (3). The upper surface of the right half of the platform (16) is slidably connected to the bottom of the moving platform (15). A spindle (12) is fixedly connected to the left side wall of the moving platform (15). A spindle water groove (13) is opened inside the spindle (12). A top head (17) is fixedly connected to the left end of the spindle (12).

2. The thick-walled seamless billet steel pipe rolling device according to claim 1, characterized in that, A guide seat (7) is fixedly connected to the upper right end of the platform (5), and a guide ring (28) is fixedly connected to the side wall of the guide seat (7). The upper surface of the platform (5) is slidably connected to the lower surface of the tube blank (6), and the outer wall of the tube blank (6) is slidably connected to the inner wall of the guide ring (28).

3. The thick-walled seamless billet steel pipe rolling device according to claim 1, characterized in that, The first rolling mill (8) is equipped with a first rolling mill (9), and the left and right ends of the first rolling mill (9) are rotatably connected to the inner wall of the first rolling mill (8). The second rolling mill (10) is equipped with a second rolling mill (11), and the left and right ends of the second rolling mill (11) are rotatably connected to the inner wall of the second rolling mill (10).

4. The thick-walled seamless billet steel pipe rolling device according to claim 1, characterized in that, The upper surface of the platform (16) is fixedly connected to the lower end of the baffle (14). A hole is provided in the middle of the baffle (14), and the inner wall of the hole is slidably connected to the outer wall of the spindle (12).

5. The rolling apparatus for thick-walled seamless billet steel pipes according to claim 2, characterized in that, The guide seat (7) has four threaded holes on its side wall, and the guide ring (28) has four threaded holes at its four ends. The guide seat (7) and the guide ring (28) are threadedly connected by screws (29) in the middle.

6. The rolling apparatus for thick-walled seamless billet steel pipes according to claim 1, characterized in that, The left end of the top head (17) is conical, and a V-shaped groove is provided on the upper surface of the platform (5).

7. The rolling apparatus for thick-walled seamless billet steel pipes according to claim 1, characterized in that, The mandrel (12) has a mandrel inlet (18) and a mandrel outlet (19) on its right side wall. The right end of the mandrel inlet (18) is fixedly connected to the left end of water pipe one (20). The right end of the mandrel outlet (19) is fixedly connected to the left end of water pipe two (21). The right end of water pipe one (20) is fixedly connected to the left end of outlet one (26). The outer wall of the right end of outlet one (26) is threadedly connected to the left side wall of the cooling circulation device (22). The left side wall of the cooling circulation device (22) has a water inlet one (23). The left end of water inlet one (23) is fixedly connected to the right end of water pipe two (21). The right side wall of the cooling circulation device (22) has a water inlet two (25) and an outlet two (24).

8. The rolling apparatus for thick-walled seamless billet steel pipes according to claim 7, characterized in that, The outlet (26) contains a filter screen (27), and the inner wall of the outlet (26) is slidably connected to the side wall of the filter screen (27).

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