Straightening device for steel structure column beam
By combining intermediate frequency induction heating and mechanical straightening of steel structure column beams, the problems of poor straightening effect and steel pipe damage in the prior art are solved, and efficient, accurate and straightening effect on steel pipes is achieved.
Patent Information
- Application Number
- CN202510221993.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-04-15
AI Technical Summary
The existing straight seam steel pipe straightening methods have poor results when bending or hard material, and are prone to damage to the steel pipe surface and inaccurate operation problems.
A steel structure column beam straightening device is adopted. The device combines intermediate frequency induction heating and mechanical straightening to reduce the yield strength by heating the steel pipe through the intermediate frequency induction heating part, and then accurately straightening is performed using the pressure straightening part and the fine-tuning straightening part to reduce damage to the steel pipe surface.
It significantly improves the straightening effect of straight seam steel pipes, reduces the damage to the steel pipes, improves the straightening accuracy and stability, and avoids poor straightening caused by large bending or hard material.
Smart Images
Figure CN119819759A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steel structure processing, in particular to a straightening device for steel structure columns and beams. Background Art
[0002] In modern architecture, steel structures are widely used due to their high strength and convenient construction. As a common material for steel structure columns and beams, the quality of straight seam steel pipes is related to the stability of the entire structure. However, straight seam steel pipes are prone to bending and deformation in multiple links, which seriously affects the performance of steel structures. In the production process, when straight seam steel pipes are welded, the uneven thermal expansion and contraction in the weld area will form residual stress, causing the steel pipe to bend. The welding heat-affected zone of large-diameter and thick-walled straight seam steel pipes is large, the residual stress is more significant, and the deformation problem is more prominent. The unqualified rate of bending deformation caused by welding in production is as high as 5%-10%.
[0003] At present, the existing straight seam steel pipe straightening methods mainly include mechanical straightening and flame straightening; mechanical straightening usually uses equipment such as a press to apply external force to the steel pipe to cause it to undergo plastic deformation to achieve the purpose of straightening; however, this method is not ideal for steel pipes with a large degree of curvature or a harder material, and in the process of applying pressure, it is easy to leave indentations on the surface of the steel pipe, affecting the appearance quality and mechanical properties of the steel pipe; flame straightening heats the curved part of the steel pipe by flame, and uses the principle of thermal expansion and contraction to straighten the steel pipe; however, this method requires a high level of technical skills from the operator, and the heating temperature and time are difficult to accurately control. Once the operation is improper, it may cause local overheating of the steel pipe, thereby reducing the strength and toughness of the steel pipe and affecting its service life; therefore, the development of an efficient, precise and less damaging straightening device for steel pipes has important practical significance and application value; in view of this, this paper proposes a straightening device for steel structure columns and beams. Summary of the invention
[0004] The main purpose of the present invention is to provide a straightening device for steel structure columns and beams, which can effectively solve the problems in the background technology.
[0005] To achieve the above object, the technical solution adopted by the present invention is: A straightening device for a steel structure column beam comprises a base frame and a hollow straight seam steel pipe, wherein a medium frequency induction heating part, a pressure straightening part, a column beam driving part, and a fine adjustment straightening part are sequentially arranged on the base frame, and the straight seam steel pipe passes through the medium frequency induction heating part, the pressure straightening part, the column beam driving part, and the fine adjustment straightening part in sequence; The fine-tuning straightening part includes a plurality of straightening roller groups and a plurality of external pull-out straightening groups, the plurality of straightening roller groups and the plurality of external pull-out straightening groups are arranged in a straight line, and the plurality of straightening roller groups and the plurality of external pull-out straightening groups are arranged alternately in a cycle in sequence; The straightening roller group includes a first frame and more than three waist-drum-shaped pressure rollers, a plurality of the pressure rollers are evenly rotated and installed in the inner frame of the first frame, the middle diameter of the pressure rollers is smaller than the diameters at both ends, the outer surface of the pressure rollers is in line contact with the outer surface of the straight seam steel pipe, the rotation center axis of the pressure rollers is spatially cross-arranged with the center axis of the straight seam steel pipe, and more than two third hydraulic cylinders are vertically connected between the pressure rollers and the inner frame of the first frame; The external pull-out straightening group comprises a second frame and more than three electromagnets, a plurality of the electromagnets are evenly mounted on the inner frame of the second frame, and a deformation gap is reserved between the electromagnets and the outer wall of the straight seam steel pipe.
[0006] Preferably, the pressure straightening part includes more than three guide frames, more than three pipe supports, more than three first hydraulic cylinders, a connecting frame and more than two second hydraulic cylinders, the lower end of the guide frame is fixedly installed on the top of the base frame, a number of the pipe supports are respectively lifted and installed in a number of guide frames, a first pipe groove is provided on the top of the pipe support, the cylinder bodies of a number of the first hydraulic cylinders are fixedly installed on the bottom of the base frame, the top ends of the piston rods in a number of the first hydraulic cylinders are respectively fixedly connected to the lower surfaces of a number of pipe supports, a number of the second hydraulic cylinders are respectively arranged above the gaps in a number of the first hydraulic cylinders, the cylinder bodies of the second hydraulic cylinders are fixedly installed on the top of the base frame through the connecting frame, the lower end of the piston rod in the second hydraulic cylinder is fixedly connected to a pressure block, and the lower surface of the pressure block is provided with a second pipe groove.
[0007] Preferably, the column beam driving part includes a motor, a fixed frame, a circular ring, an outer gear ring, a driving gear and more than three driving roller groups, the motor and the fixed frame are fixedly connected to the base frame, the circular ring is fixedly installed in the inner ring of the fixed frame, the inner ring of the outer gear ring is coaxially installed on the outer ring of the circular ring, the driving gear is fixedly connected to the output shaft of the rotor in the motor through a coupling, the outer ring of the driving gear and the outer ring of the outer gear ring are meshed with each other, and a plurality of the driving roller groups are evenly installed in the inner ring of the circular ring.
[0008] Preferably, the driving roller group includes a driving roller in the shape of a waist drum, a first roller frame, a plurality of thrust springs and a first bottom plate, two damping shafts are fixedly installed on both sides of the first roller frame, both ends of the driving roller are rotatably installed on one side of the first roller frame through two damping shafts, the first roller frame is telescopically installed on one side of the first bottom plate, both ends of the thrust spring are extruded and installed between the first roller frame and the first bottom plate, and the first bottom plate is fixedly installed on the inner wall of the ring.
[0009] Preferably, both ends of the pressure roller are rotatably connected with connecting blocks, one side of the two connecting blocks is provided with a side plate, one side of the side plate is telescopically connected with the second bottom plate, and both ends of the third hydraulic cylinder are respectively connected to the side plate and the second bottom plate.
[0010] Preferably, two guide rods are vertically connected to the back side of the second bottom plate, the guide rods on the second bottom plate are embedded and installed on the first frame, and bolts are threadedly connected between the second bottom plate and the first frame.
[0011] Preferably, the medium frequency induction heating part is specifically composed of a medium frequency induction heater, the medium frequency induction heater is fixedly installed above the base frame, and the straight seam steel pipe passes through the inner ring of the medium frequency induction heater.
[0012] Preferably, the middle diameter of the driving roller is smaller than the diameters at both ends, the outer surface of the driving roller maintains line contact with the outer surface of the straight seam steel pipe, and the rotation center axis of the driving roller and the center axis of the straight seam steel pipe are spatially crossed.
[0013] Preferably, extrusion force sensors are extrusion-connected between two connecting blocks at both ends of the side plate.
[0014] Preferably, the inner walls of the first tube groove and the second tube groove are both in contact with the outer wall of the straight seam steel pipe.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Significant straightening effect: The present invention combines medium frequency induction heating and mechanical straightening to effectively solve the problem of bending and deformation of straight seam steel pipes. The medium frequency induction heating unit is first used to heat the straight seam steel pipe to reduce its yield strength, making subsequent mechanical straightening easier. For large-diameter, thick-walled straight seam steel pipes, straightening after heating can reduce the influence of residual stress. Compared with mechanical straightening, it avoids the situation where the straightening effect is poor due to large bending or hard material, and improves the straightening accuracy.
[0016] 2. Reduce damage to steel pipes: Different from mechanical straightening that easily leaves indentations on the surface of straight seam steel pipes and affects the appearance and mechanical properties, the present invention optimizes the straightening method and utilizes multiple components such as a pressure straightening part and a fine-tuning straightening part to work together to reduce damage to the surface of the steel pipe. The waist-drum-shaped pressure roller of the straightening roller group is in contact with and fits the steel pipe line, and the extrusion force is accurately adjusted by the third hydraulic cylinder to avoid excessive extrusion. The electromagnet of the external pull-out straightening group uses magnetic field attraction to further eliminate deformation while reducing direct contact damage to the steel pipe.
[0017] 3. High operating precision and stability: The pressure straightening unit cooperates with the guide frame, pipe support, first hydraulic cylinder, second hydraulic cylinder, etc. to accurately control the support and pressure application of the straight seam steel pipe; the motor, outer gear ring, driving gear and driving roller group of the column beam drive unit work together to accurately control the rotation and movement speed of the steel pipe according to the length of the steel pipe and the straightening requirements by adjusting the motor speed to ensure a uniform and stable straightening process; the fine-tuning straightening unit adjusts the third hydraulic cylinder according to the feedback from the extrusion force sensor to achieve fine adjustment of the bending and roundness of the straight seam steel pipe, which is incomparable to the existing flame straightening due to the difficulty in accurately controlling the heating temperature and time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the pressure straightening part in the present invention; Figure 3 It is a structural schematic diagram of the column beam driving part of the present invention; Figure 4 It is a structural schematic diagram of the driving roller group in the present invention; Figure 5 It is a structural schematic diagram of the fine adjustment and straightening part of the present invention; Figure 6 It is a structural schematic diagram of the straightening roller group in the present invention; Figure 7 It is a structural schematic diagram of the external drawing and straightening group in the present invention.
[0019] In the figure: 1, chassis; 2, medium frequency induction heating unit; 3, pressure straightening unit; 31, guide frame; 32, pipe support; 33, first hydraulic cylinder; 34, connecting frame; 35, second hydraulic cylinder; 36, first pipe groove; 37, pressure block; 38, second pipe groove; 4, column beam driving unit; 41, motor; 42, fixing frame; 43, ring; 44, outer gear ring; 45, driving gear; 46, driving roller group; 461, driving roller; 462, first roller Frame; 463, thrust spring; 464, first base plate; 465, damping shaft; 5, fine-tuning straightening unit; 51, straightening roller group; 511, first frame; 512, second base plate; 513, pressure roller; 514, guide rod; 515, bolt; 516, third hydraulic cylinder; 517, side plate; 518, extrusion force sensor; 519, connecting block; 52, external pull-out straightening group; 521, second frame; 522, electromagnet; 6, straight seam steel pipe. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0021] like Figure 1-Figure 7As shown, a straightening device for steel structure columns and beams comprises a base frame 1 and a hollow straight seam steel pipe 6, on which a medium frequency induction heating part 2, a pressure straightening part 3, a column and beam driving part 4 and a fine-adjustment straightening part 5 are sequentially arranged, and the straight seam steel pipe 6 passes through the medium frequency induction heating part 2, the pressure straightening part 3, the column and beam driving part 4 and the fine-adjustment straightening part 5 in sequence. When the straightening device for steel structure columns and beams is actually used, taking the common steel structure columns and beams in the construction field as an example, a straight seam steel pipe 6 made of Q345B with an outer diameter of 377 mm, a wall thickness of 16 mm and a length of 10 m is selected as an object to be straightened. First, it is stably lifted onto the base frame 1 using lifting equipment such as a crane or a gantry crane, and it is ensured that the straight seam steel pipe 6 passes through the medium frequency induction heating part 2, the pressure straightening part 3, the column and beam driving part 4 and the fine-adjustment straightening part 5 in sequence.
[0022] It should be noted that the medium frequency induction heating unit 2 is specifically composed of a medium frequency induction heater, which is fixedly installed on the top of the base frame 1, and the straight seam steel pipe 6 passes through the inner ring of the medium frequency induction heater. The working process of the medium frequency induction heating unit 2 is as follows: the medium frequency induction heater of the medium frequency induction heating unit 2 is started. The medium frequency induction heater selected in the present invention is a WH-VI-160 medium frequency induction heater, which has a rated power of 160kW and a frequency range of 2-8kHz, which can meet the heating requirements of the selected straight seam steel pipe 6. According to the principle of electromagnetic induction, when an alternating current is passed through the medium frequency induction heater, an alternating magnetic field is generated inside the medium frequency induction heater, and the straight seam steel pipe 6 is in this alternating magnetic field. In a variable magnetic field, an induced current, that is, eddy current, will be generated inside. Since the straight seam steel pipe 6 itself has a certain resistance, the eddy current will generate heat when flowing inside the steel pipe, thereby rapidly heating the steel pipe. By precisely controlling the current frequency, voltage and other parameters of the medium frequency induction heater, the straight seam steel pipe 6 can be heated to about 650°C. At this temperature, the yield strength of the straight seam steel pipe 6 made of Q345B material is significantly reduced, and the plasticity is significantly enhanced, creating extremely favorable conditions for subsequent straightening operations. Generally, the heating time is controlled at 8-12 minutes, and the specific time will be flexibly adjusted according to the initial temperature of the straight seam steel pipe 6 and the actual heating situation.
[0023] refer to Figure 1 and Figure 2As shown, the pressure straightening part 3 includes more than three guide frames 31, more than three pipe supports 32, more than three first hydraulic cylinders 33, a connecting frame 34 and more than two second hydraulic cylinders 35. The lower end of the guide frame 31 is fixedly installed on the top of the base frame 1, and several pipe supports 32 are respectively lifted and installed in several guide frames 31. A first pipe groove 36 is arranged above the pipe supports 32. The cylinder bodies of several first hydraulic cylinders 33 are fixedly installed below the base frame 1. The top ends of the piston rods of the first hydraulic cylinders 33 are respectively fixedly connected to the lower surfaces of several pipe supports 32. Several second hydraulic cylinders 35 are respectively arranged above the gaps in several first hydraulic cylinders 33. The cylinder bodies of the second hydraulic cylinders 35 are fixedly installed on the top of the base frame 1 through the connecting frame 34. The lower end of the piston rod of the second hydraulic cylinder 35 is fixedly connected with a pressure block 37, and the lower surface of the pressure block 37 is provided with a second pipe groove 38.
[0024] Working process of the pressure straightening part 3: When the straight seam steel pipe 6 is heated to a predetermined temperature, the pressure straightening part 3 starts to work. The first hydraulic cylinder 33 is a HOB series hydraulic cylinder, specifically, the model is HOB-80 / 56-500, with a rated pressure of 25MPa and a stroke of 500mm. The first hydraulic cylinder 33 is started, and the piston rod of the first hydraulic cylinder 33 extends upward, pushing the pipe support 32 to move upward smoothly along the guide frame 31. The first pipe groove 36 above the pipe support 32 fits tightly against the outer wall of the straight seam steel pipe 6, and the steel pipe is stably lifted. Then, the second hydraulic cylinder 35 is a P1A series hydraulic cylinder, specifically, the model is P1A-100 / 63-300, with a rated pressure of 32MPa and a stroke of 300mm. The second hydraulic cylinder 35 is started, and the second hydraulic cylinder 35 The piston rod extends downward, driving the pressure block 37 to descend. The second pipe groove 38 on the lower surface of the pressure block 37 fits perfectly with the outer wall of the straight seam steel pipe 6. As the piston rod of the second hydraulic cylinder 35 continues to descend, the pressure block 37 applies downward pressure to the steel pipe. By accurately controlling the expansion and contraction amount and the pressure of the first hydraulic cylinder 33 and the second hydraulic cylinder 35, the straight seam steel pipe 6 is initially straightened. For parts with a large degree of bending, the pressure of the second hydraulic cylinder 35 can be appropriately increased to make the steel pipe plastically deform under the action of pressure and gradually restore to a straight state. In actual operation, the pressure of the first hydraulic cylinder 33 and the second hydraulic cylinder 35 can be monitored in real time according to the bending condition of the steel pipe through a pressure sensor, and the pressure can be accurately adjusted using an advanced control system to ensure the accuracy of the straightening effect.
[0025] refer to Figure 1 and Figure 3As shown, the column beam driving part 4 includes a motor 41, a fixing frame 42, a ring 43, an outer gear ring 44, a driving gear 45 and more than three driving roller groups 46. The motor 41 and the fixing frame 42 are fixedly connected to the base frame 1, the ring 43 is fixedly installed in the inner ring of the fixing frame 42, the inner ring of the outer gear ring 44 is coaxially installed on the outer ring of the ring 43, the driving gear 45 is fixedly connected to the output shaft of the rotor in the motor 41 through a coupling, the outer ring of the driving gear 45 and the outer ring of the outer gear ring 44 are meshed with each other, and a plurality of driving roller groups 46 are evenly installed in the inner ring of the ring 43.
[0026] refer to Figure 3 and Figure 4 As shown, the driving roller group 46 includes a driving roller 461 in the shape of a waist drum, a first roller frame 462, a plurality of thrust springs 463 and a first bottom plate 464, two damping shafts 465 are fixedly installed on both sides of the first roller frame 462, both ends of the driving roller 461 are rotatably installed on one side of the first roller frame 462 through the two damping shafts 465, the first roller frame 462 is telescopically installed on one side of the first bottom plate 464, both ends of the thrust spring 463 are extruded and installed between the first roller frame 462 and the first bottom plate 464, and the first bottom plate 464 is fixedly installed on the inner wall of the ring 43.
[0027] refer to Figure 3 and Figure 4 As shown, the middle diameter of the driving roller 461 is smaller than the diameters at both ends, the outer surface of the driving roller 461 maintains line contact with the outer surface of the straight seam steel pipe 6, the rotation center axis of the driving roller 461 and the center axis of the straight seam steel pipe 6 are spatially crossed, and the angle between the two is 45°, and the two ends of the side plate 517 are respectively squeezed and connected to the two connecting blocks 519 with extrusion force sensors 518, and the inner walls of the first tube groove 36 and the second tube groove 38 are both in contact with the outer wall of the straight seam steel pipe 6.
[0028] The working process of the column beam driving part 4 is as follows: after the pressure straightening part 3 completes the preliminary straightening, the column beam driving part 4 begins to play a role. The motor 41 uses a 1LA9 series three-phase asynchronous motor with a power of 22kW and a speed range of 0-1470r / min. The motor 41 is started, and the rotor of the motor 41 drives the output shaft to rotate, and the driving gear 45 is rotated synchronously through the coupling. The driving gear 45 is meshed with the outer gear ring 44 to drive the outer gear ring 44 to rotate, thereby rotating the ring 43, and the driving roller group 46 installed on the inner ring of the ring 43 rotates synchronously therewith, and the driving roller 461 in the driving roller group 46 is in contact with the outer wall line of the straight seam steel pipe 6. When the driving roller 461 rotates, it will The seam steel pipe 6 generates friction force, which pushes the straight seam steel pipe 6 to move along the axial direction and rotate around its own axis. The driving roller 461 is in the shape of a waist drum, and the rotation center axis of the driving roller 461 is spatially cross-arranged with the center axis of the straight seam steel pipe 6. This special structural design enables each part of the straight seam steel pipe 6 to be subjected to uniform force during the rotation and movement process, avoiding the situation where the local force is too large or too small. The setting of the thrust spring 463 can make the driving roller 461 automatically adjust its position according to the surface condition of the steel pipe, ensuring that it is always in close contact with the steel pipe, improving the driving effect, and according to the length of the steel pipe and the straightening requirements, the rotation speed and movement speed of the steel pipe can be accurately controlled by adjusting the speed of the motor 41; For a 10m long straight seam steel pipe 6, it is more appropriate to control the speed of the motor 41 at 400-700r / min. If it is found that the straightening effect of a certain section is not good during the straightening process of the straight seam steel pipe 6, the speed of the motor 41 can be appropriately reduced, such as reducing the speed by 50-100r / min, so that the section of the straight seam steel pipe 6 can stay in the straightening device for a longer time and receive a more sufficient straightening effect. On the contrary, if the overall straightening efficiency is low, the speed of the motor 41 can be appropriately increased while ensuring the straightening quality to increase the straightening efficiency, but the speed increase generally does not exceed 100r / min to avoid affecting the straightening accuracy.
[0029] refer to Figure 1 , Figure 5 and Figure 6As shown, the fine-tuning straightening portion 5 includes four straightening roller groups 51 and four external pull-out straightening groups 52, and the four straightening roller groups 51 and the four external pull-out straightening groups 52 are arranged in a straight line, and the four straightening roller groups 51 and the four external pull-out straightening groups 52 are arranged alternately in a cycle in sequence, and the straightening roller group 51 includes a first frame 511 and three or more waist-drum-shaped pressure rollers 513, and a plurality of pressure rollers 513 are evenly rotatably installed in the inner frame of the first frame 511, and the middle diameter of the pressure roller 513 is smaller than the diameter at both ends, and the outer surface of the pressure roller 513 maintains line contact with the outer surface of the straight seam steel pipe 6, and the rotation center axis of the pressure roller 513 is spatially crossed with the center axis of the straight seam steel pipe 6, and the angle between the two is 45°, and two or more third hydraulic cylinders 516 are vertically connected between the pressure roller 513 and the inner frame of the first frame 511.
[0030] refer to Figure 5 and Figure 6 As shown, both ends of the pressure roller 513 are rotatably connected with connecting blocks 519, one side of the two connecting blocks 519 is provided with a side plate 517, one side of the side plate 517 is telescopically connected with the second bottom plate 512, both ends of the third hydraulic cylinder 516 are respectively connected to the side plate 517 and the second bottom plate 512, the back side of the second bottom plate 512 is vertically connected with two guide rods 514, the guide rods 514 on the second bottom plate 512 are embedded and installed on the first frame 511, and bolts 515 are threadedly connected between the second bottom plate 512 and the first frame 511.
[0031] Working process of the fine-tuning straightening section 5: After being processed by the pressure straightening section 3 and the column-beam driving section 4, the straight seam steel pipe 6 enters the fine-tuning straightening section 5. The third hydraulic cylinder 516 in the straightening roller group 51 uses a MYT series small hydraulic cylinder, model MYT-40 / 25-100, with a rated pressure of 16MPa and a stroke of 100mm. When the straight seam steel pipe 6 enters the straightening roller group 51, the expansion and contraction amount of the third hydraulic cylinder 516 is accurately adjusted according to the pressure data fed back by the extrusion force sensor 518; If the extrusion pressure sensor 518 detects that the pressure value on one side of the straight seam steel pipe 6 is lower than the set standard value, it means that the steel pipe on this side may be concave or insufficiently straightened. At this time, the control system will control the extension of the third hydraulic cylinder 516 according to the pre-set program to move the pressure roller 513 to this side to increase the extrusion pressure. Under normal circumstances, the extension amount of the third hydraulic cylinder 516 is adjusted by 5-10mm each time, and the corresponding extrusion pressure increases by 100-200N. As the pressure roller 513 moves, the extrusion pressure gradually increases, and the concave part of the straight seam steel pipe 6 is squeezed to gradually restore it to flatness. During the adjustment process, the extrusion pressure and the deformation of the steel pipe are continuously monitored. When the extrusion pressure reaches the standard value and the surface flatness of the steel pipe meets the requirements, the adjustment is stopped; On the contrary, if the extrusion pressure sensor 518 detects that the pressure value on one side is too high, it means that there may be a tendency of over-straightening on that side. The control system will control the third hydraulic cylinder 516 to shorten, so that the pressing roller 513 is away from the straight seam steel pipe 6, reducing the extrusion pressure. The shortening amount each time is generally 3-5mm, corresponding to a reduction of 80-150N in the extrusion pressure. The third hydraulic cylinder 516 pushes the side plate 517, and the side plate 517 drives the pressure roller 513 to move through the connecting block 519, so as to accurately adjust the extrusion force between the pressure roller 513 and the straight seam steel pipe 6. Since the pressure roller 513 is in a waist drum shape and is in line contact with the outer surface of the straight seam steel pipe 6, its rotation center axis is spatially intersected with the center axis of the straight seam steel pipe 6. When the pressure roller 513 rotates, it will apply a complex and precise force to the straight seam steel pipe 6, which can not only effectively correct the bending of the straight seam steel pipe 6, but also fine-tune the roundness of the straight seam steel pipe 6.
[0032] refer to Figure 1 and Figure 7 As shown, the external pull-out straightening group 52 includes a second frame 521 and more than three electromagnets 522 , and the plurality of electromagnets 522 are evenly mounted on the inner frame of the second frame 521 , and a deformation gap is reserved between the electromagnets 522 and the outer wall of the straight seam steel pipe 6 .
[0033] It should be added that the electromagnet 522 in the external pull-out straightening group 52 is a MZD1 series strong electromagnet 522 produced by Yueyang Electromagnetic Equipment, model MZD1-500, with a rated suction force of 5000N. When the straight seam steel pipe 6 is moved to the external pull-out straightening group 52, the electromagnet 522 is energized, and the electromagnet 522 generates a strong magnetic field, which produces a stable and effective attraction to the straight seam steel pipe 6. If the straight seam steel pipe 6 has local bending caused by residual stress, the attraction of the electromagnet 522 will cause the straight seam steel pipe 6 to produce a small displacement in the direction of the electromagnet 522, further eliminating the residual stress and making the straight seam steel pipe 6 straighter. In actual operation, the current of the electromagnet 522 can be adjusted according to the material and straightening conditions of the straight seam steel pipe 6, so as to control the size of the attraction. For steel pipes made of Q345B material, the current of the electromagnet 522 is generally controlled between 3-5A to achieve the best straightening effect.
[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A straightening device for a steel structure column beam, comprising a base frame (1) and a hollow straight seam steel pipe (6), characterized in that: The base frame (1) is provided with a medium frequency induction heating part (2), a pressure straightening part (3), a column beam driving part (4), and a fine adjustment straightening part (5) in sequence, and the straight seam steel pipe (6) passes through the medium frequency induction heating part (2), the pressure straightening part (3), the column beam driving part (4), and the fine adjustment straightening part (5) in sequence; The fine-tuning straightening section (5) comprises a plurality of straightening roller groups (51) and a plurality of external pull-out straightening groups (52), the plurality of straightening roller groups (51) and the plurality of external pull-out straightening groups (52) are arranged in a straight line, and the plurality of straightening roller groups (51) and the plurality of external pull-out straightening groups (52) are arranged in a cyclic and alternating manner in sequence; The straightening roller group (51) comprises a first frame (511) and more than three waist-drum-shaped pressure rollers (513), wherein a plurality of the pressure rollers (513) are evenly rotatably installed in the inner frame of the first frame (511), wherein the middle diameter of the pressure rollers (513) is smaller than the diameters at both ends, wherein the outer surface of the pressure rollers (513) is in line contact with the outer surface of the straight seam steel pipe (6), and the rotation center axis of the pressure rollers (513) is spatially cross-arranged with the center axis of the straight seam steel pipe (6), and more than two third hydraulic cylinders (516) are vertically connected between the pressure rollers (513) and the inner frame of the first frame (511); The external pull-out straightening group (52) comprises a second frame (521) and more than three electromagnets (522), wherein a plurality of the electromagnets (522) are evenly mounted on an inner frame of the second frame (521), and a deformation gap is reserved between the electromagnets (522) and the outer wall of the straight seam steel pipe (6).
2. The steel structure column beam straightening device according to claim 1, characterized in that: The pressure straightening part (3) comprises more than three guide frames (31), more than three pipe supports (32), more than three first hydraulic cylinders (33), a connecting frame (34) and more than two second hydraulic cylinders (35); the lower end of the guide frame (31) is fixedly mounted above the base frame (1); a plurality of the pipe supports (32) are respectively mounted in a plurality of guide frames (31) in a lifting manner; a first pipe groove (36) is provided above the pipe supports (32); and the cylinder bodies of the plurality of the first hydraulic cylinders (33) are fixedly mounted on the base frame. (1), the top ends of the piston rods in the plurality of first hydraulic cylinders (33) are respectively fixedly connected to the lower surfaces of the plurality of pipe supports (32), the plurality of second hydraulic cylinders (35) are respectively arranged above the gaps in the plurality of first hydraulic cylinders (33), the cylinder bodies in the second hydraulic cylinders (35) are fixedly mounted above the base frame (1) via a connecting frame (34), the lower ends of the piston rods in the second hydraulic cylinders (35) are fixedly connected to a pressure block (37), and the lower surface of the pressure block (37) is provided with a second pipe groove (38).
3. The steel structure column beam straightening device according to claim 1, characterized in that: The column beam driving part (4) comprises a motor (41), a fixing frame (42), a circular ring (43), an outer gear ring (44), a driving gear (45) and more than three driving roller groups (46); the motor (41) and the fixing frame (42) are both fixedly connected to the base frame (1); the circular ring (43) is fixedly installed in the inner ring of the fixing frame (42); the inner ring of the outer gear ring (44) is coaxially installed on the outer ring of the circular ring (43); the driving gear (45) is fixedly connected to the output shaft of the rotor in the motor (41) through a coupling; the outer ring of the driving gear (45) and the outer ring of the outer gear ring (44) are meshed with each other; and a plurality of driving roller groups (46) are evenly installed in the inner ring of the circular ring (43).
4. The steel structure column beam straightening device according to claim 3, characterized in that: The driving roller group (46) comprises a waist-drum-shaped driving roller (461), a first roller frame (462), a plurality of thrust springs (463) and a first bottom plate (464); two damping shafts (465) are fixedly mounted on both sides of the first roller frame (462); two ends of the driving roller (461) are rotatably mounted on one side of the first roller frame (462) via the two damping shafts (465); the first roller frame (462) is telescopically mounted on one side of the first bottom plate (464); two ends of the thrust spring (463) are extruded and mounted between the first roller frame (462) and the first bottom plate (464); and the first bottom plate (464) is fixedly mounted on the inner wall of the ring (43).
5. The steel structure column beam straightening device according to claim 1, characterized in that: The two ends of the pressure roller (513) are rotatably connected to connecting blocks (519), one side of the two connecting blocks (519) is provided with a side plate (517), one side of the side plate (517) is telescopically connected to the second bottom plate (512), and the two ends of the third hydraulic cylinder (516) are respectively connected to the side plate (517) and the second bottom plate (512).
6. The steel structure column beam straightening device according to claim 5, characterized in that: The back side of the second bottom plate (512) is vertically connected to two guide rods (514); the guide rods (514) on the second bottom plate (512) are embedded and installed on the first frame (511); and bolts (515) are threadedly connected between the second bottom plate (512) and the first frame (511).
7. The steel structure column beam straightening device according to claim 1, characterized in that: The medium frequency induction heating part (2) is specifically formed by a medium frequency induction heater, the medium frequency induction heater is fixedly installed above the base frame (1), and the straight seam steel pipe (6) passes through the inner ring of the medium frequency induction heater.
8. The steel structure column beam straightening device according to claim 4, characterized in that: The middle diameter of the driving roller (461) is smaller than the diameters at both ends; the outer surface of the driving roller (461) maintains linear contact with the outer surface of the straight seam steel pipe (6); and the rotation center axis of the driving roller (461) and the center axis of the straight seam steel pipe (6) are spatially intersected.
9. The steel structure column beam straightening device according to claim 5, characterized in that: Extrusion force sensors (518) are respectively extruded and connected between the two ends of the side plate (517) and the two connection blocks (519).
10. The steel structure column beam straightening device according to claim 2, characterized in that: The inner walls of the first tube groove (36) and the second tube groove (38) are both in contact with the outer wall of the straight seam steel pipe (6).