Stainless steel seamless steel pipe production bending device for ships and using method thereof

Abstract

The invention discloses a ship stainless steel seamless steel pipe production bending device and a using method thereof.The ship stainless steel seamless steel pipe production bending device comprises a base, a supporting frame is fixedly connected to the surface of the base, a set of auxiliary assemblies are symmetrically arranged on the inner side of the supporting frame, an adjusting mechanism is arranged on the front side of the interior of the base, and a ship steel pipe body is attached to the surface of the adjusting mechanism; and a bending mechanism is arranged behind the ship steel pipe body. The motor effectively drives the positive and negative screw rod to rotate positively and negatively, so that a group of movable blocks are driven to get away from or get close to each other, and the distance between a group of limiting frames is adjusted, so that the distance between the group of limiting frames is matched with the length of a ship steel pipe body needing to be bent; and meanwhile, the vertical parts of the limiting frames can be attached to most ship steel pipe bodies with different diameters in a matched mode, the ship steel pipe body needing to be bent is placed on the rear side of one set of limiting frames and attached to the first rubber sleeve, the first rubber sleeve can improve protection on the ship steel pipe body, and damage to the surface of the ship steel pipe body is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of production of seamless steel pipes for ships, and in particular to a production and bending device for seamless stainless steel pipes for ships and a use method thereof. Background Art

[0002] Ship seamless steel pipe refers to seamless steel pipe specially used in shipbuilding process. The specifications of this steel pipe are very wide, with outer diameter ranging from 8mm to 1240mm and wall thickness ranging from 1mm to 200mm. The material of ship seamless steel pipe can be stainless steel, which is used in the process of ship construction and maintenance because it has high strength and corrosion resistance and can meet the use requirements of ships in complex marine environments. During the production process, the ship seamless steel pipe needs to be bent into the required shape with the help of a bending device to adapt to the installation environment on the ship.

[0003] Patent No. CN220479831U discloses a steel pipe bending device that can be easily fixed, including a workbench, a fixed plate and a bending table, an L-shaped bracket is provided on the top of the workbench, a first cylinder is provided on the L-shaped bracket, the first cylinder is connected to a bending piece, the fixed plate is arranged on both sides of the top of the workbench, the opposite side walls of the fixed plate are provided with a plurality of fixed grooves, a support rod is provided in the fixed groove, a plurality of first springs are provided on the support rod, the first spring is arranged around the outer wall of the support rod, a first arc plate is provided on the first spring, the bending table is arranged between the fixed plates, the bending table is provided with a groove, and the groove is laterally provided with a plurality of bending grooves.

[0004] However, the above-mentioned steel pipe bending device that can be easily fixed still has the following shortcomings:

[0005] In the above device, since the specifications of the fixed groove, the arc groove at the lower end of the bending part and the bending groove are fixed, the diameter range of the steel pipe that can be bent by the device is limited, which makes the device have usage limitations. For this reason, we propose a production and bending device for stainless steel seamless steel pipes for ships and a method for using it. Summary of the invention

[0006] The object of the present invention is to provide a production and bending device for seamless stainless steel pipes for ships and a method for using the same, so as to solve the problem that the device proposed in the above-mentioned background technology has limitations in use because the specifications of the fixed groove, the arc groove at the lower end of the bending piece and the bending groove are fixed, so the diameter range of the steel pipe that can be bent by the device is limited.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a production and bending device for stainless steel seamless steel pipes for ships and a method for using the same, comprising a base, a support frame fixedly connected to the surface of the base, a group of auxiliary components symmetrically arranged inside the support frame, an adjustment mechanism arranged on the front side of the inside of the base, a ship steel pipe body attached to the surface of the adjustment mechanism, and a bending mechanism arranged behind the ship steel pipe body;

[0008] The adjustment mechanism includes forward and reverse screw rods, which are mounted inside the base, one end of the forward and reverse screw rods is connected to a motor, a positioning frame is provided outside the motor, a group of movable blocks are symmetrically sleeved on the surface of the forward and reverse screw rods, the surface of the movable blocks is fitted with a limiting frame, a rubber sleeve is sleeved on the outer side of the vertical part of the limiting frame, and a clamping shaft is fixedly connected to the lower end of the limiting frame.

[0009] Preferably, the front and rear end surfaces of the movable block are in contact with the inner wall of the base, and the movable block is threadedly connected to the forward and reverse screw rods.

[0010] Preferably, the clamping shaft is in an inverted T-shape, the limiting frame forms a rotating structure through the clamping shaft and the movable block, and the bottom end of the vertical portion of the limiting frame is flush with the surface of the base.

[0011] Preferably, the auxiliary component includes a slide groove, a group of the slide grooves are symmetrically opened inside the support frame, a multi-stage hydraulic cylinder 1 is provided inside the slide groove, a movable end of the multi-stage hydraulic cylinder 1 is connected to a sliding block, a support rod is fixedly connected to the side of the sliding block, a rotating rod passes through the support rod, the bottom end of the rotating rod is fixedly connected to a limiting cylinder, and a rubber sleeve 2 is provided on the outside of the limiting cylinder.

[0012] Preferably, the sliding block is H-shaped, and the sliding block forms a telescopic structure with the sliding groove through a multi-stage hydraulic cylinder.

[0013] Preferably, a section of external thread is provided on the lower side of the surface of the rotating rod, and the support rod is threadedly connected to the external thread section of the rotating rod.

[0014] Preferably, the bending mechanism includes a multi-stage hydraulic cylinder II, which is arranged on the surface of the support frame, and a protrusion is connected to the movable end of the multi-stage hydraulic cylinder II, and a T-bar is fixedly connected to the side of the protrusion away from the multi-stage hydraulic cylinder II, and a group of electric push rods are symmetrically arranged at the lower end of the horizontal part of the T-bar, and the movable end of the electric push rod is connected to a limiting ring plate, and a fixed frame is fixedly connected to the bottom of the T-bar, and a roller is engaged inside the fixed frame.

[0015] Preferably, the bottom of the T-shaped rod is flush with the surface of the base, and a limiting groove for the bottom fixing frame of the T-shaped rod and the roller to move is provided on the inner side of the base surface.

[0016] Preferably, the

[0017] S1. The motor drives the forward and reverse screw rods to rotate forward and reverse, thereby driving a group of movable blocks to move away from or close to each other, thereby adjusting the distance between a group of limit frames, so that the distance between a group of limit frames is adapted to the length of the ship steel pipe body to be bent;

[0018] S2. The staff places the ship steel pipe body to be bent behind a set of limit frames and fits it with the rubber sleeve 1. The rubber sleeve 1 can improve the protection of the ship steel pipe body and reduce the damage to the surface of the ship steel pipe body. Since the limit frame forms a rotating structure through the clamping shaft and the movable block, the limit frame will not generate reverse resistance to the ship steel pipe body during the bending process;

[0019] S3. When the two ends of the ship steel pipe body do not need to maintain horizontal transverse direction after bending, the support rod is connected to the external threaded section of the rotating rod, and the limit cylinder is in a raised state. At this time, it will not affect the adjustment of the position angle of the end of the ship steel pipe body during the bending process. When the two ends of the ship steel pipe body still need to maintain horizontal transverse direction after bending, the rotating rod is screwed to make the bottom of the limit cylinder contact the surface of the base, and then the slider is driven to move by the multi-stage hydraulic cylinder, so that the ship steel pipe body is clamped between the limit frame and the limit cylinder, so as to achieve the horizontal limit of the end of the ship steel pipe body;

[0020] S4. After the ship steel pipe body is placed, the T-bar is driven forward by the multi-stage hydraulic cylinder 2, so that the surface of the T-bar contacts the surface of the ship steel pipe body, and then the limit ring plate is driven downward by the electric push rod until the bottom of the limit ring plate contacts the top of the ship steel pipe body, reducing the possibility of the deformation part of the ship steel pipe body tilting during the bending process, and then the multi-stage hydraulic cylinder 2 is started again, and the T-bar pushes the ship steel pipe body to complete the bending;

[0021] S5. After the bending is completed, the T-bar is driven backward by the multi-stage hydraulic cylinder 2 to remove the bent ship steel pipe body.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention effectively drives the forward and reverse screw rods to rotate forward and reverse through a motor, thereby driving a group of movable blocks to move away from or close to each other, thereby realizing the adjustment of the spacing between a group of limit frames, so that the spacing between a group of limit frames is adapted to the length of the ship steel pipe body that needs to be bent, and at the same time, the vertical part of the limit frame can adapt to and fit most ship steel pipe bodies with different diameters. The ship steel pipe body that needs to be bent is placed on the rear side of a group of limit frames and fits with the rubber sleeve one. The rubber sleeve one can improve the protection of the ship steel pipe body and reduce the damage to the surface of the ship steel pipe body. Since the limit frame forms a rotating structure with the movable block through the clamping shaft, the limit frame will not generate reverse resistance to the ship steel pipe body during the bending process.

[0024] 2. In the present invention, when the two ends of the ship steel pipe body do not need to maintain a horizontal horizontal position after bending, the support rod is connected to the external threaded section of the rotating rod, and the limit cylinder is in a raised state. At this time, it will not affect the adjustment of the position angle of the end of the ship steel pipe body during the bending process. When the two ends of the ship steel pipe body still need to maintain a horizontal horizontal position after bending, the rotating rod is rotated to make the bottom of the limit cylinder contact the base surface, and then the slider is driven to move by a multi-stage hydraulic cylinder, so that the ship steel pipe body is clamped between the limit frame and the limit cylinder, thereby realizing the horizontal limitation of the end of the ship steel pipe body.

[0025] 3. The present invention effectively drives the T-bar forward through the multi-stage hydraulic cylinder 2, so that the surface of the T-bar contacts the surface of the ship steel pipe body, and then drives the limit ring plate downward through the electric push rod until the bottom of the limit ring plate contacts the top of the ship steel pipe body, thereby reducing the possibility of the deformation part of the ship steel pipe body tilting during the bending process, and then continues to start the multi-stage hydraulic cylinder 2, and the T-bar pushes the ship steel pipe body to complete the bending. After the bending is completed, the multi-stage hydraulic cylinder 2 drives the T-bar backward, and the bent ship steel pipe body can be removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the auxiliary component adjustment state structure of the present invention;

[0028] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the partial disassembly structure of the regulating mechanism of the present invention;

[0030] Figure 5 It is a bottom-up three-dimensional structural schematic diagram of the bending mechanism of the present invention;

[0031] In the figure: 1. base; 2. support frame; 3. auxiliary components; 4. adjustment mechanism; 5. ship steel pipe body; 6. bending mechanism;

[0032] 301, slideway; 302, multi-stage hydraulic cylinder 1; 303, slide block; 304, support rod; 305, rotating rod; 306, limit cylinder; 307, rubber sleeve 2;

[0033] 401, positive and negative screw rods; 402, motor; 403, positioning frame; 404, movable block; 405, limit frame; 406, rubber sleeve 1; 407, clamping shaft;

[0034] 601, multi-stage hydraulic cylinder 2; 602, bump; 603, T-bar; 604, electric push rod; 605, limit ring plate; 606, fixed frame; 607, roller. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1-5 The present invention provides a technical solution: a production and bending device for seamless stainless steel pipes for ships and a method for using the same, comprising a base 1, a support frame 2 is fixedly connected to the surface of the base 1, a group of auxiliary components 3 are symmetrically arranged inside the support frame 2, an adjustment mechanism 4 is arranged on the front side of the inside of the base 1, a ship steel pipe body 5 is attached to the surface of the adjustment mechanism 4, and a bending mechanism 6 is arranged behind the ship steel pipe body 5;

[0037] The adjustment mechanism 4 includes a positive and negative screw rod 401, which is mounted inside the base 1, one end of the positive and negative screw rod 401 is connected to a motor 402, a positioning frame 403 is provided outside the motor 402, and a group of movable blocks 404 are symmetrically sleeved on the surface of the positive and negative screw rod 401, wherein the front and rear end surfaces of the movable blocks 404 are in contact with the inner wall of the base 1, and the movable blocks 404 and the positive and negative screw rods 401 are threadedly connected, and a limiting frame 405 is in contact with the surface of the movable block 404, and a rubber sleeve 406 is sleeved on the outer side of the vertical part of the limiting frame 405, and a clamping shaft 407 is fixedly connected to the lower end of the limiting frame 405. Furthermore, the clamping shaft 407 is in an inverted T shape, and the limiting frame 405 forms a rotating structure with the movable block 404 through the clamping shaft 407, and the bottom end of the vertical part of the limiting frame 405 is flush with the surface of the base 1. The present invention effectively drives the forward and reverse screw rods 401 to rotate forward and reverse through the motor 402, thereby driving a group of movable blocks 404 to move away from or closer to each other, thereby realizing the adjustment of the spacing between a group of limit frames 405, so that the spacing between a group of limit frames 405 is adapted to the length of the ship steel pipe body 5 that needs to be bent, and at the same time, the vertical part of the limit frame 405 can be adapted to fit most ship steel pipe bodies 5 of different diameters. The ship steel pipe body 5 that needs to be bent is placed on the rear side of a group of limit frames 405 and fits with the rubber sleeve 406. The rubber sleeve 406 can improve the protection of the ship steel pipe body 5 and reduce the damage to the surface of the ship steel pipe body 5. Since the limit frame 405 and the movable block 404 form a rotating structure through the clamping shaft 407, the limit frame 405 will not generate reverse resistance to the ship steel pipe body 5 during the bending process.

[0038] The auxiliary component 3 includes a slide groove 301, a group of slide grooves 301 are symmetrically opened inside the support frame 2, a multi-stage hydraulic cylinder 302 is arranged inside the slide groove 301, and a slider 303 is connected to the movable end of the multi-stage hydraulic cylinder 302, wherein the slider 303 is H-shaped, and the slider 303 forms a telescopic structure with the slide groove 301 through the multi-stage hydraulic cylinder 302, a support rod 304 is fixedly connected to the side of the slider 303, and a rotating rod 305 passes through the support rod 304, further, a section of external thread is opened on the lower side of the surface of the rotating rod 305, and the external thread section of the support rod 304 and the rotating rod 305 are threadedly connected, and the bottom end of the rotating rod 305 is fixedly connected to a limiting cylinder 306, and a rubber sleeve 2 307 is provided on the outside of the limiting cylinder 306. In the present invention, when the two ends of the ship steel pipe body 5 do not need to maintain a horizontal horizontal direction after bending, the support rod 304 is connected to the external threaded section of the rotating rod 305, and the limiting cylinder 306 is in a raised state. At this time, it will not affect the adjustment of the position angle of the end of the ship steel pipe body 5 during the bending process. When the two ends of the ship steel pipe body 5 still need to maintain a horizontal horizontal direction after bending, the rotating rod 305 is rotated to make the bottom of the limiting cylinder 306 contact the surface of the base 1, and then the slider 303 is driven to move by the multi-stage hydraulic cylinder 302, so that the ship steel pipe body 5 is clamped between the limiting frame 405 and the limiting cylinder 306, so as to achieve the horizontal limitation of the end of the ship steel pipe body 5.

[0039] The bending mechanism 6 includes a multi-stage hydraulic cylinder 601, which is arranged on the surface of the support frame 2. The movable end of the multi-stage hydraulic cylinder 601 is connected to a protrusion 602, and the side of the protrusion 602 away from the multi-stage hydraulic cylinder 601 is fixedly connected to a T-bar 603. A group of electric push rods 604 are symmetrically arranged at the lower end of the horizontal part of the T-bar 603. The movable end of the electric push rod 604 is connected to a limiting ring plate 605. A fixing frame 606 is fixedly connected to the bottom of the T-bar 603, and a roller 607 is engaged inside the fixing frame 606. The bottom of the T-bar 603 is flush with the surface of the base 1, and the inner side of the surface of the base 1 is provided with a limiting groove for the movement of the fixing frame 606 and the roller 607 at the bottom of the T-bar 603. The present invention effectively drives the T-bar 603 forward through the multi-stage hydraulic cylinder 2 601, so that the surface of the T-bar 603 contacts the surface of the ship steel pipe body 5, and then drives the limit ring plate 605 downward through the electric push rod 604 until the bottom of the limit ring plate 605 contacts the top of the ship steel pipe body 5, thereby reducing the possibility of the deformation part of the ship steel pipe body 5 tilting during the bending process, and then continues to start the multi-stage hydraulic cylinder 2 601, and the T-bar 603 pushes the ship steel pipe body 5 to complete the bending. After the bending is completed, the multi-stage hydraulic cylinder 2 601 drives the T-bar 603 to move backward, and the bent ship steel pipe body 5 can be removed.

[0040] Working principle: The production bending device and its use method for this type of stainless steel seamless pipe for ships are as follows:

[0041] S1. The motor 402 drives the forward and reverse screw rods 401 to rotate forward and reverse, thereby driving a group of movable blocks 404 to move away from or close to each other, thereby adjusting the distance between a group of limit frames 405, so that the distance between a group of limit frames 405 is adapted to the length of the ship steel pipe body 5 to be bent;

[0042] S2. The staff places the ship steel pipe body 5 to be bent on the rear side of a set of limit frames 405 and fits it with the rubber sleeve 1 406. The rubber sleeve 1 406 can improve the protection of the ship steel pipe body 5 and reduce the damage to the surface of the ship steel pipe body 5. Since the limit frame 405 and the movable block 404 form a rotating structure through the clamping shaft 407, the limit frame 405 will not generate reverse resistance to the ship steel pipe body 5 during the bending process;

[0043] S3. When the two ends of the ship steel pipe body 5 do not need to maintain horizontal transverse direction after bending, the support rod 304 is connected to the external threaded section of the rotating rod 305, and the limiting cylinder 306 is in a raised state. At this time, it will not affect the adjustment of the position angle of the end of the ship steel pipe body 5 during the bending process. When the two ends of the ship steel pipe body 5 still need to maintain horizontal transverse direction after bending, the rotating rod 305 is screwed to make the bottom of the limiting cylinder 306 contact the surface of the base 1, and then the slider 303 is driven to move by the multi-stage hydraulic cylinder 1 302, so that the ship steel pipe body 5 is clamped between the limiting frame 405 and the limiting cylinder 306, so as to achieve the horizontal limit of the end of the ship steel pipe body 5;

[0044] S4. After the ship steel pipe body 5 is placed, the T-shaped rod 603 is driven forward by the multi-stage hydraulic cylinder 2 601, so that the surface of the T-shaped rod 603 contacts the surface of the ship steel pipe body 5, and then the limit ring plate 605 is driven downward by the electric push rod 604 until the bottom of the limit ring plate 605 contacts the top of the ship steel pipe body 5, so as to reduce the possibility of the deformation part of the ship steel pipe body 5 tilting during the bending process, and then the multi-stage hydraulic cylinder 2 601 is started again, and the T-shaped rod 603 pushes the ship steel pipe body 5 to complete the bending;

[0045] S5. After the bending is completed, the multi-stage hydraulic cylinder 2 601 drives the T-bar 603 to move backward, and the bent ship steel pipe body 5 can be removed.

[0046] 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 device for producing and bending seamless stainless steel pipes for ships, comprising a base (1), characterized in that: A support frame (2) is fixedly connected to the surface of the base (1), a group of auxiliary components (3) are symmetrically arranged inside the support frame (2), an adjustment mechanism (4) is arranged on the front side of the inside of the base (1), a ship steel pipe body (5) is attached to the surface of the adjustment mechanism (4), and a bending mechanism (6) is arranged at the rear of the ship steel pipe body (5); The adjusting mechanism (4) comprises a forward and reverse screw rod (401), the forward and reverse screw rod (401) is mounted inside the base (1), one end of the forward and reverse screw rod (401) is connected to a motor (402), a positioning frame (403) is arranged outside the motor (402), a group of movable blocks (404) are symmetrically sleeved on the surface of the forward and reverse screw rod (401), a limit frame (405) is fitted on the surface of the movable block (404), a rubber sleeve (406) is sleeved on the outer side of the vertical part of the limit frame (405), and a clamping shaft (407) is fixedly connected to the lower end of the limit frame (405).

2. The device for producing and bending a seamless stainless steel pipe for ships according to claim 1, characterized in that: The front and rear end surfaces of the movable block (404) are in contact with the inner wall of the base (1), and the movable block (404) is threadedly connected to the forward and reverse screw rods (401).

3. The production and bending device for seamless stainless steel pipes for ships according to claim 1 is characterized in that: The clamping shaft (407) is in an inverted T shape, and the limiting frame (405) forms a rotating structure through the clamping shaft (407) and the movable block (404), and the bottom end of the vertical part of the limiting frame (405) is flush with the surface of the base (1).

4. The production and bending device for seamless stainless steel pipes for ships according to claim 1 is characterized in that: The auxiliary component (3) comprises a slide groove (301), a group of the slide grooves (301) are symmetrically arranged inside the support frame (2), a multi-stage hydraulic cylinder (302) is arranged inside the slide groove (301), a movable end of the multi-stage hydraulic cylinder (302) is connected to a slider (303), a support rod (304) is fixedly connected to the side of the slider (303), a rotating rod (305) passes through the support rod (304), a bottom end of the rotating rod (305) is fixedly connected to a limiting cylinder (306), and a rubber sleeve (307) is provided on the outside of the limiting cylinder (306).

5. The production and bending device for seamless stainless steel pipes for ships according to claim 4, characterized in that: The sliding block (303) is H-shaped, and the sliding block (303) forms a telescopic structure with the sliding groove (301) through a multi-stage hydraulic cylinder (302).

6. The production and bending device for seamless stainless steel pipes for ships according to claim 4, characterized in that: The lower side of the surface of the rotating rod (305) is provided with a section of external thread, and the support rod (304) and the external thread section of the rotating rod (305) are threadedly connected.

7. The production and bending device for seamless stainless steel pipes for ships according to claim 1 is characterized by: The bending mechanism (6) comprises a second multi-stage hydraulic cylinder (601), wherein the second multi-stage hydraulic cylinder (601) is arranged on the surface of the support frame (2), the movable end of the second multi-stage hydraulic cylinder (601) is connected with a protrusion (602), the side of the protrusion (602) away from the second multi-stage hydraulic cylinder (601) is fixedly connected with a T-shaped rod (603), the lower end of the horizontal part of the T-shaped rod (603) is symmetrically provided with a group of electric push rods (604), the movable ends of the electric push rods (604) are connected with a limiting ring plate (605), the bottom of the T-shaped rod (603) is fixedly connected with a fixing frame (606), and a roller (607) is engaged inside the fixing frame (606).

8. The production and bending device for seamless stainless steel pipes for ships according to claim 7, characterized in that: The bottom of the T-shaped rod (603) is flush with the surface of the base (1), and a limiting groove for the bottom fixing frame (606) and the roller (607) of the T-shaped rod (603) to move is provided on the inner side of the surface of the base (1).

9. A device for producing and bending a seamless stainless steel pipe for ships and a method for using the same according to claims 1-8, characterized in that: S1. The forward and reverse screw rods (401) are driven to rotate forward and reverse by the motor (402), thereby driving a group of movable blocks (404) to move away from or approach each other, thereby adjusting the spacing between a group of limiting frames (405), so that the spacing between a group of limiting frames (405) is adapted to the length of the ship steel pipe body (5) that needs to be bent; S2. The staff places the ship steel pipe body (5) to be bent on the rear side of a set of limiting frames (405) and fits it with the rubber sleeve (406). The rubber sleeve (406) can improve the protection of the ship steel pipe body (5) and reduce the damage to the surface of the ship steel pipe body (5). Since the limiting frame (405) and the movable block (404) form a rotating structure through the clamping shaft (407), the limiting frame (405) will not generate reverse resistance to the ship steel pipe body (5) during the bending process. S3. When the two ends of the ship steel pipe body (5) do not need to maintain a horizontal horizontal position after being bent, the support rod (304) is connected to the external threaded section of the rotating rod (305), and the limiting cylinder (306) is in a raised state. At this time, the adjustment of the position angle of the end of the ship steel pipe body (5) during the bending process will not be affected. When the two ends of the ship steel pipe body (5) still need to maintain a horizontal horizontal position after being bent, the rotating rod (305) is rotated to make the bottom of the limiting cylinder (306) contact the surface of the base (1), and then the slider (303) is driven to move by the multi-stage hydraulic cylinder (302), so that the ship steel pipe body (5) is clamped between the limiting frame (405) and the limiting cylinder (306), so as to achieve horizontal limiting of the end of the ship steel pipe body (5); S4. After the ship steel pipe body (5) is placed, the T-shaped rod (603) is driven forward by the multi-stage hydraulic cylinder (601) so that the surface of the T-shaped rod (603) contacts the surface of the ship steel pipe body (5). Then, the electric push rod (604) drives the limit ring plate (605) to move downward until the bottom of the limit ring plate (605) contacts the top of the ship steel pipe body (5), thereby reducing the possibility of the deformation part of the ship steel pipe body (5) tilting during the bending process. The multi-stage hydraulic cylinder (601) is then started again, and the T-shaped rod (603) pushes the ship steel pipe body (5) to complete the bending. S5. After the bending is completed, the T-shaped rod (603) is driven backward by the multi-stage hydraulic cylinder 2 (601), and the bent ship steel pipe body (5) can be removed.

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