Large-diameter seamless steel pipe straightening tool

Abstract

The utility model discloses a large-caliber seamless steel pipe straightening tool which comprises a base, two clamping blocks and an auxiliary straightening mechanism, a bracket corresponding to a steel pipe is arranged in the middle of the base, the auxiliary straightening mechanism comprises a fixed table, a movable table and an auxiliary straightening block, a lead screw is arranged at the rear end of the fixed table, and guide rods are symmetrically arranged on the fixed table on the two sides of the lead screw. A driving mechanism for driving the lead screw to rotate is further arranged at the front end of the fixing table, the auxiliary straightening block is connected to the lead screw in a threaded mode, the two guide rods penetrate through corresponding guide holes in the auxiliary straightening block respectively, the auxiliary straightening block is in a flat disc shape corresponding to the inner diameter of a steel pipe, and the auxiliary straightening block and the steel pipe are coaxially arranged during straightening. According to the utility model, the auxiliary straightening block is matched with the two clamping blocks to straighten a steel pipe and finish fine straightening and pipe wall repairing of the steel pipe at the same time, and the steel pipe straightening device is particularly suitable for straightening operation of a thin-wall large-diameter seamless steel pipe.

Description

Technical Field

[0001] This utility model relates to a straightening fixture for large-diameter seamless steel pipes. Background Technology

[0002] The walls of large-diameter seamless steel pipes are often relatively thin, and the existing steel pipe straightening equipment is mostly roller straightening equipment. When straightening with this equipment, the pipe wall is easily crushed. In addition, since the pipe wall of large-diameter seamless steel pipes often has some indentation at the bend, the steel pipe needs to be straightened and repaired, which is a complicated process. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a tooling for straightening thin-walled, large-diameter seamless steel pipes, and to repair the dents in the steel pipes during the straightening process.

[0004] The technical solution of this utility model is: a large-diameter seamless steel pipe straightening fixture, including a base, two clamping blocks that are respectively moved left and right and connected to both sides of the base, and an auxiliary straightening mechanism;

[0005] The base is provided with a support for the corresponding steel pipe in the middle. The steel pipe is placed on the support. When the two clamping blocks clamp and straighten the steel pipe, they maintain a distance from the support.

[0006] The auxiliary straightening mechanism includes a fixed platform, a movable platform, and an auxiliary straightening block. The fixed platform has a lead screw at its rear end, and a guide rod is symmetrically arranged on both sides of the fixed platform. The fixed platform also has a drive mechanism at its front end to drive the lead screw to rotate. The auxiliary straightening block is screwed onto the lead screw. The two guide rods pass through corresponding guide holes on the auxiliary straightening block. The auxiliary straightening block is a flat disc shape corresponding to the inner diameter of the steel pipe. When straightening, the auxiliary straightening block is coaxially arranged with the steel pipe. The movable platform has connection holes corresponding to the lead screw and guide rod.

[0007] The fixed platform is fixed to the front end of the base, and the movable platform is movably connected to the rear end of the base.

[0008] Specifically, the support is a long, narrow slide rail with an arc-shaped top.

[0009] Specifically, the rear end of the support extends out from the rear end of the base.

[0010] Furthermore, the auxiliary straightening block has a frustum of a cone at both its front and rear ends.

[0011] Furthermore, the movable platform is provided with a connecting sleeve corresponding to the lead screw, and the connecting sleeve is rotatably connected to the corresponding connecting hole on the movable platform.

[0012] Furthermore, wall panels are provided on both sides of the base, and hydraulic cylinders for driving the clamping blocks to move are provided on the two wall panels respectively. The piston rod of the hydraulic cylinder is connected to the corresponding clamping block.

[0013] Furthermore, the base is also provided with multiple guide rails corresponding to the two clamping blocks, and the bottom of the two clamping blocks is provided with sliders corresponding to each guide rail, and each slider matches the corresponding guide rail.

[0014] Furthermore, reinforcing plates are also provided on the outer sides of both wall panels.

[0015] Furthermore, the bottom of the mobile platform is also equipped with rollers with brakes.

[0016] Specifically, the drive mechanism is a forward and reverse geared motor.

[0017] The advantages of this utility model are: simple structure, the auxiliary straightening block and two clamping blocks can straighten the steel pipe and complete the fine calibration and pipe wall repair at the same time, which is especially suitable for the straightening operation of thin-walled large-diameter seamless steel pipes. Attached Figure Description

[0018] Figure 1 This is a top view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] In the diagram: 1. Base; 2. Clamping block; 3. Steel pipe; 4. Support; 5. Fixed platform; 6. Moving platform; 7. Auxiliary straightening block; 8. Lead screw; 9. Guide rod; 10. Drive mechanism; 11. Wall panel; 12. Hydraulic cylinder; 13. Guide rail; 14. Reinforcing plate. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] Combination Figure 1 and Figure 2 As shown, a large-diameter seamless steel pipe straightening fixture includes a base 1, two clamping blocks 2 that are respectively moved left and right and connected to both sides of the base 1, and an auxiliary straightening mechanism.

[0023] The base 1 has a support 4 in the middle corresponding to the steel pipe 3. The steel pipe 3 is placed on the support 4. When the two clamping blocks 2 clamp and straighten the steel pipe 3, they maintain a distance from the support 4.

[0024] The auxiliary straightening mechanism includes a fixed platform 5, a movable platform 6, and an auxiliary straightening block 7. The fixed platform 5 has a lead screw 8 at its rear end, and a guide rod 9 is symmetrically arranged on both sides of the fixed platform 5. The fixed platform 5 also has a drive mechanism 10 for driving the lead screw 8 to rotate at its front end. The auxiliary straightening block 7 is screwed onto the lead screw 8. The two guide rods 9 pass through corresponding guide holes on the auxiliary straightening block 7. The auxiliary straightening block 7 is a flat disc shape corresponding to the inner diameter of the steel pipe 3. When straightening, the auxiliary straightening block 7 is coaxially arranged with the steel pipe 3. The movable platform 6 has connection holes corresponding to the lead screw 8 and the guide rods 9.

[0025] The fixed platform 5 is fixed to the front end of the base 1, and the movable platform 6 is movably connected to the rear end of the base 1.

[0026] The working principle of the above structure is as follows: Initially, the moving platform 6 is removed, and the thin-walled, large-diameter seamless steel pipe is placed on the support 4. Since the distance between the two guide rods 9 is much smaller than the inner diameter of the steel pipe 3, the steel pipe 3 can be directly pushed into the space between the two clamping blocks 2 along the support 4. Furthermore, since the bending point of the steel pipe 3 generally does not occur at the end of the steel pipe 3, the auxiliary straightening block 7 located at the rear end of the fixed platform 5 can be directly inserted into the end of the steel pipe 3. After the steel pipe 3 is pushed in, the two clamping blocks 2 close together to clamp and straighten the steel pipe 3. The tube 3 is initially straightened under the action of the two clamping blocks 2; then the moving seat is moved to the rear end of the base 1, and the lead screw 8 and the two guide rods 9 are respectively passed through the corresponding holes on the moving seat to provide support for the lead screw 8 and the two guide rods 9. The drive mechanism 10 is started, causing the auxiliary straightening block 7 to move along the inside of the steel tube 3 to perform fine straightening of the steel tube 3, ensuring the coaxiality of the steel tube 3 and repairing some of the dents in its tube wall. After the fine straightening is completed, the auxiliary straightening block 7 is reset, the two clamping blocks 2 are reset, the moving table 6 is removed, and the straightened steel tube 3 can be pulled out.

[0027] The advantages of the above structure are: the structure is simple, and the auxiliary straightening block 7, together with the two clamping blocks 2, can straighten the steel pipe 3 while completing the fine calibration and pipe wall repair of the steel pipe 3. It is especially suitable for the straightening operation of thin-walled large-diameter seamless steel pipes.

[0028] In another embodiment, combined Figure 1 and Figure 2 As shown, the support 4 is a long strip-shaped slide rail, and the top of the slide rail is arc-shaped.

[0029] In another embodiment, such as Figure 1 As shown, the rear end of the support 4 extends beyond the rear end of the base 1, so that the steel pipe 3 can be placed on the support 4 for pushing in or pulling out.

[0030] In another embodiment, such as Figure 2 As shown, the auxiliary straightening block 7 has a frustum at both the front and rear ends to facilitate entry into or exit from the steel pipe 3.

[0031] In another embodiment, the movable stage 6 is provided with a connecting sleeve corresponding to the lead screw 8. The connecting sleeve is rotatably connected to the corresponding connecting hole on the movable stage 6 to avoid damage to the lead screw 8.

[0032] In another embodiment, combined Figure 1 and Figure 2 As shown, wall plates 11 are provided on both sides of the base 1, and hydraulic cylinders 12 for driving the clamping blocks 2 to move are provided on the two wall plates 11 respectively. The piston rod of the hydraulic cylinder 12 is connected to the corresponding clamping block 2.

[0033] In another embodiment, combined Figure 1 and Figure 2 As shown, the base 1 is also provided with multiple guide rails 13 corresponding to the two clamping blocks 2. The bottom of the two clamping blocks 2 is provided with sliders corresponding to each guide rail 13. Each slider matches the corresponding guide rail 13 to avoid the clamping blocks 2 from shifting during the clamping and straightening process.

[0034] In another embodiment, combined Figure 1 and Figure 2 As shown, the outer sides of the two wall panels 11 are also provided with reinforcing plates 14 to ensure the reliability of the wall panels 11.

[0035] In another embodiment, the bottom of the mobile platform 6 is also provided with rollers equipped with brakes.

[0036] In another embodiment, the drive mechanism 10 is a forward and reverse geared motor.

Claims

1. A large-diameter seamless steel pipe straightening tool characterized by, It comprises a base (1), two clamping blocks (2) respectively and movably connected to the two sides of the base (1), and an auxiliary straightening mechanism. The base (1) is provided with a supporting seat (4) corresponding to the steel pipe (3) in the middle, the steel pipe (3) is placed on the supporting seat (4), and the two clamping blocks (2) are spaced from the supporting seat (4) when clamping and straightening the steel pipe (3). The auxiliary straightening mechanism comprises a fixed table (5), a moving table (6) and an auxiliary straightening block (7), the rear end of the fixed table (5) is provided with a lead screw (8), the two sides of the lead screw (8) are provided with a guide rod (9) on the fixed table (5) symmetrically, the front end of the fixed table (5) is further provided with a driving mechanism (10) for driving the lead screw (8) to rotate, the auxiliary straightening block (7) is screwed on the lead screw (8), the two guide rods (9) pass through the corresponding guide holes of the auxiliary straightening block (7) respectively, the auxiliary straightening block (7) is a flat disc corresponding to the inner diameter of the steel pipe (3), and the auxiliary straightening block (7) is coaxially arranged with the steel pipe (3) during straightening, the moving table (6) is provided with a connecting hole corresponding to the lead screw (8) and the guide rod (9). The fixed table (5) is fixed to the front end of the base (1), and the moving table (6) is movably connected to the rear end of the base (1).

2. A large-diameter seamless steel pipe straightening tool according to claim 1, characterized in that, The supporting seat (4) is a long strip-shaped slide rail, and the top of the slide rail is arc-shaped.

3. A large-diameter seamless steel pipe straightening tool according to claim 2, characterized by The rear end of the supporting seat (4) extends out of the rear end of the base (1).

4. A large-diameter seamless steel pipe straightening tool according to claim 3, characterized by The front and rear ends of the auxiliary straightening block (7) are respectively provided with a conical table.

5. A large-diameter seamless steel pipe straightening tool according to claim 4, characterized by The moving table (6) is provided with a connecting sleeve corresponding to the lead screw (8), and the connecting sleeve is rotatably connected in the corresponding connecting hole of the moving table (6).

6. A large-diameter seamless steel pipe straightening tool according to claim 5, wherein The base (1) is provided with wall plates (11) on the two sides respectively, the two wall plates (11) are respectively provided with hydraulic cylinders (12) for driving the clamping blocks (2) to displace, and the piston rods of the hydraulic cylinders (12) are connected with the corresponding clamping blocks (2).

7. A large-diameter seamless steel pipe straightening tool according to claim 6, characterized in that, The base (1) is further provided with a plurality of guide rails (13) corresponding to the two clamping blocks (2), and the bottoms of the two clamping blocks (2) are respectively provided with sliding blocks corresponding to the guide rails (13), and the sliding blocks are matched with the corresponding guide rails (13).

8. A large-diameter seamless steel pipe straightening tool according to claim 7, characterized by The outer sides of the two wall plates (11) are further respectively provided with reinforcing plates (14).

9. A large-diameter seamless steel pipe straightening tool according to claim 8, characterized by The moving table (6) is further provided with a roller with a brake at the bottom.

10. A large-diameter seamless steel pipe straightening tool according to claim 9, characterized by The driving mechanism (10) is a forward and reverse reduction motor.

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