Roundness supporting device for large tubular structure and roundness adjusting method

Abstract

The invention discloses a roundness supporting device for a large tubular structure and a roundness adjusting method.The roundness supporting device comprises the roundness supporting device body, the roundness supporting device body comprises a circular base and a plurality of supporting columns, and the supporting columns are distributed on the circumferential face of the circular base in a circumferential array mode; the end, away from the circular base, of each supporting column can abut against the inner wall of the circular steel pipe. The device further comprises a rotating column, the rotating column is coaxially installed on the circular base, and a hydraulic expansion piece is vertically connected to the rotating column. The end of the telescopic part of the hydraulic telescopic device is connected with a contour wheel, and the hydraulic telescopic device stretches out to enable the contour wheel to be in rolling fit with the inner wall of the circular steel pipe. The device further comprises a distance sensor, and the distance sensor can detect the change of the distance between the profiling wheel support and the axis of the rotating column in real time. According to the tubular steel roundness adjusting device, the roundness of tubular steel can be accurately adjusted, the machining requirements of large tubular steel with different pipe diameters can be met, accidents such as eccentricity of the tubular steel in the machining process can be avoided, and therefore the finished product quality and operation safety are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tubular structure processing, and more specifically relates to a roundness supporting device and a roundness adjusting method for a large tubular structure. Background Art

[0002] In the processing of large tubular steels, roundness accuracy is a key indicator affecting structural stability and assembly quality. Traditional roundness adjustment relies on manual operation or fixed support structures. Manual adjustment requires repeated adjustment of the equipment, and the final roundness deviation is still large. The fixed support structure cannot support tubular steels of different diameters and cannot be used in processing that requires dynamic structures, which causes the pipe to be easily eccentric or swinging during processing, affecting the quality of the finished product and operational safety. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a roundness support device and a roundness adjustment method for large tubular structures, which can not only accurately adjust the roundness of tubular steels, but also meet dynamic processing requirements; not only can it avoid accidents such as eccentricity of the pipe during processing, thereby improving the quality of the finished product and operating safety, but also meet the processing requirements of large tubular steels of different diameters.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides a roundness support device and a roundness adjustment method for a large tubular structure, comprising a circular steel pipe and a roundness support device, wherein the roundness support device is detachably installed in the circular steel pipe, wherein the roundness support device comprises a circular base and a plurality of support columns, wherein the plurality of support columns are distributed in a circular array on the circumference of the circular base, wherein a jack is arranged at one end of each support column away from the circular base, wherein the end of the push rod of each jack is connected to a magnetic adsorption device, wherein the push motion of each jack can make the adsorption end of each magnetic adsorption device press against and adsorb on the inner wall of the circular steel pipe; further comprising a rotating column, wherein the rotating column is coaxially installed on one side of the circular base, wherein a hydraulic expansion joint is vertically connected to the rotating column; wherein the end of the expansion part of the hydraulic expansion joint is connected to a profiling wheel bracket, wherein a profiling wheel is installed in the profiling wheel bracket, wherein the extension of the hydraulic expansion joint can make the profiling wheel roll and cooperate with the inner wall of the circular steel pipe; further comprising a distance sensor, wherein the distance sensor can detect the distance change between the profiling wheel bracket and the axis of the rotating column in real time.

[0005] Furthermore, a driving internal gear is provided between the rotating column and the circular base, the driving internal gear is coaxially connected to the rotating column, a driving shaft through hole is coaxially penetrated on the circular base, a driving motor is installed on the side of the circular base away from the rotating column, the output shaft of the driving motor passes through the driving shaft through hole and is drivingly connected to the driving internal gear.

[0006] Furthermore, the distance sensor is installed on one end of the profiling wheel bracket close to the hydraulic telescopic device, and the sensing end of the distance sensor is aligned with the end face of the cylinder body of the hydraulic telescopic device close to the end of the profiling wheel bracket; when the profiling wheel rolls against the inner wall of the circular steel pipe, the distance sensor can detect the distance change between the profiling wheel bracket and the end face of the hydraulic telescopic device cylinder body close to the end of the profiling wheel bracket, thereby reflecting the dynamic distance change between the profiling wheel bracket and the axis of the rotating column.

[0007] Furthermore, the two circular steel pipes are placed on the processing platform in sequence along the axial direction, and roundness supporting devices are provided in the pipe openings of the two circular steel pipes at one end close to each other, and the two roundness supporting devices are symmetrically arranged, and the two rotating columns are located on the side where the two roundness supporting devices are close to each other; it also includes a synchronization shaft, and the synchronization shaft is coaxially fixedly connected between the two rotating columns. When the pushing rods of the jacks on the two roundness supporting devices are pushed outward by the same distance, so that the magnetic adsorption devices are simultaneously contact-adsorbed on the inner wall of the corresponding circular steel pipe, the two circular steel pipes and the two roundness supporting devices are coaxial.

[0008] Furthermore, when the two driving motors synchronously drive the two rotating columns to rotate in the same direction around their own axes, the two distance sensors can synchronously and real-time record the dynamic distance change data between their corresponding contoured wheel brackets and the rotating column axes, and adjust the pushing distance of each jack pushing rod through the two dynamic distance change data, so that the roundness of the two circular steel pipes is the same.

[0009] Furthermore, it also includes a circular process plate, the diameter of which is equal to the inner diameter of the circular steel pipe. When the push rods of the jacks on the roundness support device are pushed outward by the same distance, so that the magnetic adsorption devices connected to the ends of the push rods are pressed against the inner wall of the circular steel pipe at the same time, the circular process plate can be pushed into the interior of the circular steel pipe coaxially.

[0010] Further, a roundness adjustment method for a roundness support device for a large tubular structure:

[0011] Step 1: Place two circular steel pipes on the processing platform along the axis direction and splice them;

[0012] Step 2: In the state of step 1, the two roundness support devices are respectively placed at the pipe openings of the two round steel pipes close to each other, and the push rods of the jacks on the two roundness support devices are controlled to push the same distance, so that the adsorption ends of the magnetic adsorption devices can be adsorbed on the inner wall of the corresponding round steel pipe in a contact manner;

[0013] Step 3: Under the condition of step 2, the telescopic parts of the two hydraulic telescopic devices are controlled to extend in the radial direction of the circular steel pipe until the profiling wheels in the profiling wheel brackets connected to the ends of the two hydraulic telescopic devices contact the inner walls of the corresponding circular steel pipes;

[0014] Step 4: Under the condition of step 3, the power of the two hydraulic expanders is adjusted so that the expansion and contraction parts of the two hydraulic expanders always tend to be away from the axis of the circular steel pipe;

[0015] Step 5: Under the condition of step 4, the two driving motors are controlled to drive the two rotating columns to rotate in the same direction around their own axes at the same speed with the same power, and the two distance sensors synchronously and real-timely record the dynamic distance change data between the corresponding contour wheel brackets and the rotating column axes;

[0016] Step 6: Determine the area where the roundness of the two circular steel pipes does not overlap through two different dynamic distance change data, and determine the deviation value between the two roundness profiles;

[0017] Step 7: Invert the areas where the roundness of the two circular steel pipes does not overlap identified in step 6, so as to obtain the positions of each area corresponding to the two circular steel pipes, and adjust the pushing distance of the jack pushing rod at each position according to the deviation value between the two roundness profiles;

[0018] Step 8: Based on step 7, the contact area of ​​the two circular steel pipes is welded to complete the welding of the two circular steel pipes with the same axis and roundness.

[0019] Beneficial effects: The roundness support device and roundness adjustment method for large tubular structures of the present invention can not only accurately adjust the roundness of tubular steels through the jacks, hydraulic expanders and contour wheels arranged on each support column, but also meet the processing requirements of large tubular steels of different diameters. By arranging a magnetic adsorption device on the jack, accidents such as eccentricity of the pipe during processing can be avoided, thereby improving the quality of the finished product and operational safety, and can meet dynamic processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of an application scenario of the first embodiment of the present invention;

[0021] Figure 2It is a structural schematic diagram of the roundness support device of the present invention;

[0022] Figure 3 This is a schematic diagram of an application scenario of the second embodiment of the present invention;

[0023] Figure 4 It is the axial view of the circular steel tube;

[0024] Figure 5 A is a partial enlarged view;

[0025] Figure 6 Schematic diagram of the output of the imaging system through which the data monitored and recorded by the distance sensor is output. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] As attached Figure 1 As shown, a roundness support device and roundness adjustment method for a large tubular structure include a round steel pipe 1 and a roundness support device 3, wherein the roundness support device 3 is detachably installed in the round steel pipe 1, and the roundness support device 3 can be adjusted along the radial direction of the round steel pipe 1, so that the roundness support device 3 can be pressed against the inner wall of the round steel pipe 1; Figure 2As shown, the roundness support device 3 includes a circular base 4 and a plurality of support columns 12, the length of each support column 12 is less than the radius of the circular steel pipe 1, and the plurality of support columns 12 are distributed on the circumferential surface of the circular base 4 in a circular array, and a jack 13 is provided at one end of each support column 12 away from the circular base 4, and the push rod of each jack 13 can perform telescopic movement relative to the body of the jack 13 along the radial direction of the circular steel pipe 1; the end of the push rod of each jack 13 is connected with a magnetic adsorption device 16, and the magnetic adsorption device 16 shown is a permanent magnetic suction cup, and the magnetism of the magnetic adsorption device 16 is adjustable. The pushing movement of each jack 13 can make the adsorption end of each magnetic adsorption device 16 press and adsorb on the inner wall of the circular steel pipe 1, and in the adsorption state, each magnetic adsorption device 16 can avoid relative sliding between the roundness support device 3 and the circular steel pipe 1; it also includes a rotating column 6, and the rotating column 6 is The axis is installed on one side of the circular base 4, and the rotating column 6 can rotate around its own axis relative to the circular base 4. A hydraulic expander 8 is vertically connected to the rotating column 6, and one end of the cylinder of the hydraulic expander 8 away from the expansion part of the hydraulic expander is fixedly connected to the rotating column 6, and the hydraulic expander 8 uses a hydraulic expander without a self-locking function; when installing the hydraulic expander 8, a certain distance should be left between the hydraulic expander 8 and the roundness support device 3 to avoid motion interference between the hydraulic expander 8 and the roundness support device 3 when the rotating column 6 rotates with the hydraulic expander 8; the end of the expansion part of the hydraulic expander 8 is connected to a profiling wheel bracket 9, and a profiling wheel 10 is installed in the profiling wheel bracket 9, and the profiling wheel 10 can rotate around its own axis relative to the profiling wheel bracket 9, and the extension of the hydraulic expander 8 can make the profiling wheel 10 roll with the inner wall of the circular steel pipe 1; it also includes a distance sensor 7, such as Figure 4 and 5 As shown, due to unavoidable reasons in the forging process, the contour of the inner wall of the circular steel tube 1 is not a standard circle, but a circular contour with fewer small protrusions 19 and depressions 23. Therefore, the distance sensor 7 can detect the distance change between the contour wheel bracket 9 and the axis of the rotating column 6 in real time.

[0028] The roundness support device 3 is placed at the pipe mouth of one end of the circular steel pipe 1, and the push rods of several jacks 13 on the roundness support device 3 are controlled to push outward the same distance in the radial direction of the circular steel pipe 1, so that the adsorption end of each magnetic adsorption device 16 can be adsorbed on the inner wall of the circular steel pipe 1 in a contact manner. At this time, under the action of each magnetic adsorption device 16, the axis of the circular base 4 of the roundness support device 3 is in the same straight line. Since the rotating column 6 is coaxially installed on the circular base 4, the axis of the rotating column 6 is in the same straight line with the axis of the circular steel pipe 1 at this time; then the telescopic part of the hydraulic expander 8 vertically connected to the rotating shaft 6 is controlled to extend in the radial direction of the circular steel pipe 1 until the profiling wheel 10 in the profiling wheel bracket 9 connected to the end of the hydraulic expander 8 contacts the inner wall of the circular steel pipe 1; at this time, the hydraulic expander is adjusted The power of the hydraulic expander 8 makes the hydraulic cylinder of the hydraulic expander 8 have a very small force on the expansion part of the hydraulic expander 8 along the radial direction of the circular steel pipe 1, and this force makes the expansion part of the hydraulic expander 8 always have a tendency to move away from the axis of the circular steel pipe 1; then the rotating column 6 is controlled to rotate around the axis of the rotating column 6 with the hydraulic expander 8. In the process of the hydraulic expander 8 rotating with the rotating column 6, under the action of the hydraulic cylinder of the hydraulic expander 8, the profiling wheel 10 is always in contact with the inner wall of the circular steel pipe 1 and is always in sliding cooperation with the inner wall of the circular steel pipe 1; in the process of the profiling wheel 10 sliding cooperation with the inner wall of the circular steel pipe 1, the distance sensor 7 detects the distance change between the profiling wheel bracket 9 and the axis of the rotating column 6 in real time, and sends the detection data to the imaging system; the image output by the imaging system can obtain the roundness contour map of the inner wall of the circular steel pipe 1.

[0029] like Figure 2 As shown, a driving internal gear 5 is provided between the rotating column 6 and the circular base 4, and the driving internal gear 5 is coaxially connected to the rotating column 6, and a driving shaft through hole is coaxially penetrated on the circular base 4, and a driving motor 11 is installed on the side of the circular base 4 away from the rotating column 6, and the output shaft of the driving motor 11 passes through the driving shaft through hole and is drivingly connected to the driving internal gear 5; because the driving motor 11 drives the rotating column 6 to rotate around its own axis, the distance sensor 7 needs to detect and record the dynamic distance change between the contour wheel bracket 9 and the axis of the rotating column 6 in real time, so the rotating column 6 needs to rotate at a slower speed, so the driving shaft of the driving motor 11 can be connected to a reduction mechanism such as a reduction box, and then the output end of the reduction mechanism such as the reduction box is drivingly connected to the driving internal gear 5, so as to achieve the purpose of controlling the speed of the rotating column 6 when it rotates around its own axis.

[0030] The distance sensor 7 is installed on one end of the profiling wheel bracket 9 close to the hydraulic expansion joint 8, and the sensing end of the distance sensor 7 is aligned with the end face of the cylinder body of the hydraulic expansion joint 8 close to the profiling wheel bracket 9; since there are fewer small protrusions 19 and depressions 23 in the inner wall profile of the circular steel tube 1, and when the profiling wheel 10 contacts the inner wall of the circular steel tube 1, the hydraulic cylinder of the hydraulic expansion joint 8 has only a very small force on the expansion part of the hydraulic expansion joint 8 along the radial direction of the circular steel tube 1; therefore, when the profiling wheel 10 rolls with the inner wall of the circular steel tube 1, the expansion part of the hydraulic expansion joint 8 jumps axially relative to the cylinder body of the hydraulic expansion joint 8, thereby causing the end of the profiling wheel bracket 9 close to the hydraulic expansion joint 8 and the cylinder body of the hydraulic expansion joint 8 close to the end of the profiling wheel bracket 9. The distance between the end faces changes, and the distance sensor 7 can detect the distance change between the profiling wheel bracket 9 and the end face of the hydraulic telescopic device 8 cylinder body close to the profiling wheel bracket 9. Since in the process of the rotating column 6 rotating around its own axis, the axis of the rotating column 6 is always in the same straight line with the axis of the circular steel pipe 1, and the cylinder body of the telescopic hydraulic cylinder 8 is fixedly connected to the rotating column 6, the distance between the end face of the cylinder body of the telescopic hydraulic cylinder 8 close to the profiling wheel bracket 9 and the axis of the rotating column 6 will not change. Therefore, the distance sensor 7 detects the distance change between the end face of the profiling wheel bracket 9 close to the hydraulic telescopic device 8 and the end face of the cylinder body of the hydraulic telescopic device 8 close to the profiling wheel bracket 9, which can reflect the dynamic distance change between the profiling wheel bracket 9 and the axis of the rotating column 6.

[0031] like Figure 6 As shown, in the process of the distance sensor 7 detecting the dynamic distance change between the profiling wheel bracket 9 and the axis of the rotating column 6 in real time, as the rolling fit between the profiling wheel 10 and the inner wall of the circular steel pipe 1 advances, the distance sensor 7 converts the dynamic distance change record between the profiling wheel bracket 9 and the axis of the rotating column 6 into dynamic distance change data 22, and inputs the dynamic distance change data 22 into the imaging system in sequence. The dynamic distance change data 22 is a value equal to the distance between the profiling wheel bracket 9 and the axis of the rotating column 6. The imaging system draws each of the dynamic distance change data 22 in a circular distribution with a certain point as the center of the circle. That is, each dynamic distance change data 22 takes a certain point as the starting point, and draws a straight line with each data as the length, and the angles between two adjacent straight lines are equal. Finally, the focus points of each straight line are connected together through continuous arcs to form a circular contour that is the same as the contour of the inner wall of the circular steel tube 1; since each dynamic distance change data 22 is input into the imaging system in sequence, the position corresponding to each dynamic distance change data 22 on the inner wall of the circular steel tube 1 can be inferred based on the rotation speed of the rotating column 6, the recording frequency of the distance sensor 7, and the position of the starting point of the rolling cooperation between the profiling wheel 10 and the inner wall of the circular steel tube 1.

[0032] In the first embodiment of the present invention, there are two circular steel pipes 1 and two roundness supporting devices 3. The inner diameter and outer diameter of the two circular steel pipes 1 are equal, but due to unavoidable reasons in the forging process, the roundness of the two circular steel pipes 1 is not the same. However, in many usage scenarios, it is necessary to ensure that the roundness of the two circular steel pipes 1 after being welded together is consistent. Therefore, before the two circular steel pipes 1 are coaxially welded together, the two roundness supporting devices 3 need to be respectively installed in the two circular steel pipes 1, and the corresponding circular steel pipes 1 are supported respectively, so that the roundness of the ends of the two circular steel pipes 1 that are close to each other are consistent, and then the two circular steel pipes 1 are welded together.

[0033] like Figure 1 As shown, the two circular steel pipes 1 are placed on the processing platform in sequence along the axial direction, and the two circular steel pipes 1 are roughly coaxially spliced ​​together through a bracket. A roundness support device 3 is provided in the pipe openings of the two circular steel pipes 1 close to each other at one end, and the two roundness support devices 3 are symmetrically arranged, and the two rotating columns 6 are both located on the side where the two roundness support devices 3 are close to each other; it also includes a synchronous shaft 21, and the synchronous shaft 21 is coaxially fixedly connected between the two rotating columns 6. The two ends of the synchronous shaft 21 can be fixedly connected to the two rotating columns 6 by welding or by clamping. During the connection process, it is necessary to ensure that the axis of the synchronous shaft 21 is simultaneously aligned with the two rotating columns 6. The axes of the rotating columns 6 are on the same straight line, thereby ensuring that the extended lines of the axes of the two rotating shafts 6 coincide with the axis of the synchronous shaft 21 after connection. When the push rods of the jacks 13 on the two roundness support devices 3 are pushed outward by the same distance, so that the magnetic adsorption devices 16 are simultaneously contact-adsorbed on the inner walls of their corresponding circular steel pipes 1, the axes of the circular bases 4 of the roundness support devices 3 are on the same straight line with the axes of the circular steel pipes 1, and the two rotating columns 6 are coaxially connected to the circular bases in their corresponding roundness support devices 3. Therefore, at this time, the two circular steel pipes 1 and the two roundness support devices 3 are coaxial.

[0034] When the two profiling wheels 10 are in contact with the inner walls of the corresponding circular steel pipes 1, the two driving motors 11 are controlled to drive the two rotating columns 6 to rotate in the same direction around their own axes at the same speed with the same power. When the two driving motors 11 synchronously drive the two rotating columns 6 to rotate in the same direction around their own axes, the two distance sensors 7 can synchronously and real-time record the dynamic distance change data 22 between the corresponding profiling wheel brackets 9 and the axes of the rotating columns 6, and input the two different dynamic distance change data 22 into the imaging system, thereby obtaining the roundness contour map of the inner walls of the two circular steel pipes 1. By comparing the coincidence of the concentric circles of the roundness contour maps of the inner walls of the two circular steel pipes 1, the area where the roundness of the two circular steel pipes 1 does not overlap can be accurately identified, and then the pushing distance of the pushing rods of each jack 13 is adjusted according to the two dynamic distance change data 22, so that the roundness of the two circular steel pipes 1 is the same.

[0035] In a first embodiment of the present invention, a roundness adjustment method for a roundness support device for a large tubular structure is provided:

[0036] Step 1: Place two circular steel pipes 1 on the processing platform along the axis direction and splice them;

[0037] Step 2: Under the state of step 1, the two roundness supporting devices 3 are respectively placed at the pipe mouths of the two circular steel pipes 1 at one end close to each other, and the pushing rods of the several jacks 13 on the two roundness supporting devices 3 are controlled to push outwards along the radial direction of the circular steel pipe 1 by the same distance, so that the adsorption end of each magnetic adsorption device 16 can be adsorbed on the inner wall of the corresponding circular steel pipe 1 in a contact manner. At this time, under the action of each magnetic adsorption device 16, the axis of the circular base 4 of each roundness supporting device 3 is in the same straight line with the axis of the corresponding circular steel pipe 1; since the coaxial axis is arranged between the rotating shafts 6 on the two circular bases 4, the coaxial axis is connected with a synchronous shaft 21, so under the joint action of the synchronous shaft 21 and the rotating shaft 6, the axis of the circular base 4 of the two roundness supporting devices 3 is on the same axis; at this time, the two circular steel pipes 1 and the two roundness supporting devices 3 are coaxial;

[0038] Step 3: Under the condition of step 2, the telescopic parts of the two hydraulic telescopic devices 8 vertically connected to the two rotating shafts 6 are controlled to extend in the radial direction of the circular steel pipe 1 until the profiling wheels 10 in the profiling wheel brackets 9 connected to the ends of the two hydraulic telescopic devices 8 contact the inner walls of the corresponding circular steel pipes 1;

[0039] Step 4: Under the condition of step 3, adjust the power of the two hydraulic telescopic devices 8 and ensure that the power of the two hydraulic telescopic devices 8 is the same, so that the hydraulic cylinders of the two hydraulic telescopic devices 8 have a very small force on their respective telescopic parts along the radial direction of the circular steel pipe 1, so that the telescopic parts of the two hydraulic telescopic devices 8 always have a tendency to move away from the axis of the circular steel pipe 1. The same power can ensure that the hydraulic cylinders of the two hydraulic telescopic devices 8 have equal forces on their respective telescopic parts;

[0040] Step 5: Under the condition of step 4, the two driving motors 11 are controlled to drive the two rotating columns 6 to rotate in the same direction around their own axes at the same speed with the same power, and the two distance sensors 7 synchronously and real-timely record the dynamic distance change data 22 between the corresponding contour wheel brackets 9 and the axes of the rotating columns 6, and input the two different dynamic distance change data 22 into the imaging system;

[0041] Step 6: After the imaging system outputs the roundness contours of the inner walls of the two circular steel tubes 1, the roundness contours of the inner walls of the two circular steel tubes 1 are overlapped with the center of the circle and compared, so as to achieve the purpose of determining the area where the roundness of the two circular steel tubes 1 does not overlap through two different dynamic distance change data 22, and determining the deviation value between the two roundness contours;

[0042] Step 7: Invert the areas where the roundness of the two circular steel pipes 1 do not overlap as identified in step 6, so as to obtain the positions of the areas corresponding to the two circular steel pipes 1, and adjust the pushing distance of the pushing rod of the jack 13 at each position according to the deviation value between the two roundness profiles until the two roundness profiles completely overlap;

[0043] For example, when the distance between a point on the roundness contour diagram of the inner wall of a circular steel tube 1 and the center of the circle is smaller than the distance between a point at the same position on the roundness contour diagram of the inner wall of another circular steel tube 1 and the center of the circle, it means that the inner wall of the circular steel tube 1 corresponding to the data with a smaller distance from the center of the circle has a protrusion 19 close to its axis. At this time, it is necessary to infer the position corresponding to the point on the inner wall of the circular steel tube 1 through inversion, and then increase the pushing distance of the pushing rod of the jack 13 at the position corresponding to the point on the inner wall of the circular steel tube 1 according to the distance difference, so that the protrusion 19 at this position is pushed up in the direction away from the axis of the circular steel tube 1, so that the roundness of the inner walls of the two circular steel tubes 1 overlap.

[0044] Step 8: Based on step 7, the contact area of ​​the two circular steel pipes 1 is welded, thereby completing the welding work of the two circular steel pipes 1 with the same axis and roundness.

[0045] In addition to the processing method of welding two circular steel pipes 1 with the same axis and roundness together in the above-mentioned first embodiment, there is also a structural method for processing large tubular steel materials in which a circular process plate 2 with a diameter equal to the inner diameter of the circular steel pipe 1 is welded into the circular steel pipe 1. In view of this processing scheme, the present invention proposes a second embodiment.

[0046] like Figure 3 As shown, in the second embodiment of the present invention, a circular process plate 2 is also included, and the diameter of the circular process plate 2 is equal to the inner diameter of the circular steel pipe 1. Due to unavoidable reasons in the forging process, the contour of the inner wall of the circular steel pipe 1 and the circular contour of the circular process plate 2 are not standard circles, but are quasi-circular contours with fewer small protrusions 19 and recesses 23. The roundness support device 3 is placed in the pipe mouth at one end of the circular steel pipe 1, and the push rods of each jack 13 on the roundness support device 3 are pushed outward by the same distance, so that the ends of each push rod are connected The magnetic adsorption devices 16 are pressed against the inner wall of the circular steel pipe 1 at the same time. At this time, the circular process plate 2 is coaxially fitted on the pipe mouth of the circular steel pipe 1 near the roundness support device 3. At this time, due to the difference in the roundness of the inner wall of the circular steel pipe 1 and the roundness of the circular process plate 2, the circular process plate 2 cannot be pushed into the circular steel pipe 1. At this time, by adjusting the pushing distance of the pushing rod of the jack 13, the roundness of the inner wall of the circular steel pipe 1 and the roundness of the circular process plate 2 are made to coincide. At this time, the circular process plate 2 can be coaxially pushed into the interior of the circular steel pipe 1.

[0047] Since the welding position of the circular process plate 2 is not necessarily located at the pipe mouth of the circular steel tube 1, when the circular process plate 2 needs to be moved inside the circular steel tube 1 along the axial direction of the circular steel tube 1, if the roundness support device 3 is still at the pipe mouth of the circular steel tube 1, the circular process plate 2 cannot be moved to the processing position due to the toughness of the circular steel tube 1 itself. Therefore, in order to ensure that the circular process plate 2 can be pushed to the processing position inside the circular steel tube 1, the roundness support device 3 needs to move synchronously with the circular process plate 2; therefore, in the second embodiment of the present invention, it also includes a pressure seat 14, and several of the pressure seats 14 are integrally connected to the top push of each jack 13 At the end of the rod, each of the magnetic adsorption devices 16 is in its corresponding pressing seat 14, and traveling wheels 15 are arranged on both sides of each pressing seat 14. When each of the magnetic adsorption devices 16 is adsorbed and fixed on the inner wall of the circular steel pipe 1, each of the traveling wheels 15 rolls with the inner wall of the circular steel pipe 1; when the magnetism of the magnetic adsorption device 16 disappears through the adjustment device of the magnetic adsorption device 16, under the action of external force, the roundness support device 3 can move in the circular steel pipe 1 along the axial direction of the circular steel pipe 1 through each traveling wheel 15 until the circular support device 3 and the circular process plate 2 are synchronously moved along the axial direction of the circular steel pipe 1 to the processing position of the circular process plate 2.

[0048] The above are preferred embodiments of the present invention. It should be noted that a person skilled in the art may make several improvements and modifications without departing from the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A roundness support device for large tubular structures, characterized in that: The invention comprises a circular steel pipe (1) and a roundness support device (3), wherein the roundness support device (3) is detachably installed in the circular steel pipe (1), and the roundness support device (3) comprises a circular base (4) and a plurality of support columns (12), wherein the plurality of support columns (12) are distributed in a circular array on the circumference of the circular base (4), and a jack (13) is arranged at one end of each support column (12) away from the circular base (4), and the end of the push rod of each jack (13) is connected to a magnetic adsorption device (16), and the push movement of each jack (13) can cause the adsorption end of each magnetic adsorption device (16) to be pressed and adsorbed on the circular base (4). The invention relates to a circular steel tube (1) and a circular steel tube (1). The circular steel tube (1) is provided with a rotating column (6) coaxially mounted on one side of the circular base (4). The rotating column (6) is vertically connected with a hydraulic expansion joint (8). The end of the expansion part of the hydraulic expansion joint (8) is connected with a profiling wheel bracket (9). The profiling wheel bracket (9) is provided with a profiling wheel (10). When the hydraulic expansion joint (8) is extended, the profiling wheel (10) can roll with the inner wall of the circular steel tube (1). The invention also comprises a distance sensor (7). The distance sensor (7) can detect the distance change between the profiling wheel bracket (9) and the axis of the rotating column (6) in real time.

2. A roundness support device for a large tubular structure according to claim 1, characterized in that: A driving internal gear (5) is provided between the rotating column (6) and the circular base (4); the driving internal gear (5) is coaxially connected to the rotating column (6); a driving shaft through hole is coaxially penetrated on the circular base (4); a driving motor (11) is installed on the side of the circular base (4) away from the rotating column (6); an output shaft of the driving motor (11) passes through the driving shaft through hole and is drivingly connected to the driving internal gear (5).

3. The roundness support device for a large tubular structure according to claim 1, characterized in that: The distance sensor (7) is mounted on one end of the profiling wheel bracket (9) close to the hydraulic expansion joint (8), and the sensing end of the distance sensor (7) is aligned with the end face of the cylinder of the hydraulic expansion joint (8) close to the profiling wheel bracket (9); when the profiling wheel (10) rolls against the inner wall of the circular steel pipe (1), the distance sensor (7) can detect the distance change between the profiling wheel bracket (9) and the end face of the cylinder of the hydraulic expansion joint (8) close to the profiling wheel bracket (9), thereby reflecting the dynamic distance change between the profiling wheel bracket (9) and the axis of the rotating column (6).

4. The roundness support device for a large tubular structure according to claim 1, characterized in that: The two circular steel pipes (1) are placed on a processing platform in sequence along the axial direction. A roundness support device (3) is provided in the pipe openings of the two circular steel pipes (1) close to each other at one end, and the two circularness support devices (3) are symmetrically arranged. The two rotating columns (6) are both located on the side where the two circularness support devices (3) are close to each other. It also includes a synchronization shaft (21), and the synchronization shaft (21) is coaxially fixedly connected between the two rotating columns (6). When the push rods of the jacks (13) on the two circularness support devices (3) are pushed outward by the same distance, so that the magnetic adsorption devices (16) are simultaneously contact-adsorbed on the inner wall of the corresponding circular steel pipe (1), the two circular steel pipes (1) and the two circularness support devices (3) are coaxial.

5. The roundness support device for a large tubular structure according to claim 4, characterized in that: When the two driving motors (11) synchronously drive the two rotating columns (6) to rotate in the same direction around their own axes, the two distance sensors (7) can synchronously and real-time record the dynamic distance change data (22) between the corresponding contour wheel brackets (9) and the axes of the rotating columns (6). The pushing distance of the pushing rods of the jacks (13) is adjusted by the two dynamic distance change data (22), so that the roundness of the two circular steel pipes (1) is the same.

6. The roundness support device for a large tubular structure according to claim 1, characterized in that: It also includes a circular process plate (2), the diameter of which is equal to the inner diameter of the circular steel pipe (1). When the push rods of the jacks (13) on the roundness support device (3) are pushed outward by the same distance, so that the magnetic adsorption devices (16) connected to the ends of the push rods are pressed against the inner wall of the circular steel pipe (1) at the same time, the circular process plate (2) can be coaxially pushed into the interior of the circular steel pipe (1).

7. The roundness adjustment method for a roundness support device for a large tubular structure according to claim 1, characterized in that: Step 1: Place two circular steel pipes (1) on a processing platform along the axis direction and splice them; Step 2: In the state of step 1, the two roundness support devices (3) are respectively placed at the pipe openings of the two circular steel pipes (1) close to each other, and the pushing rods of the plurality of jacks (13) on the two roundness support devices (3) are controlled to push the same distance, so that the adsorption ends of the magnetic adsorption devices (16) can be adsorbed on the inner wall of the corresponding circular steel pipe (1) in a contact manner; Step 3: Under the condition of step 2, the telescopic parts of the two hydraulic telescopic devices (8) are controlled to extend in the radial direction of the circular steel pipe (1) until the contour wheels (10) in the contour wheel brackets (9) connected to the ends of the two hydraulic telescopic devices (8) contact the inner walls of the circular steel pipes (1) respectively corresponding to them; Step 4: Under the condition of step 3, the power of the two hydraulic expansion joints (8) is adjusted so that the expansion parts of the two hydraulic expansion joints (8) always tend to move away from the axis of the circular steel pipe (1); Step 5: Under the condition of step 4, the two driving motors (11) are controlled to drive the two rotating columns (6) to rotate in the same direction around their own axes at the same speed with the same power, and the two distance sensors (7) synchronously and in real time record the dynamic distance change data (22) between the corresponding contour wheel brackets (9) and the axes of the rotating columns (6); Step 6: Determine the area where the roundness of the two circular steel pipes (1) does not overlap by using two different dynamic distance change data (22), and determine the deviation value between the two roundness profiles; Step 7: Invert the areas of the two circular steel pipes (1) whose roundness does not overlap as identified in step 6, so as to obtain the positions of each area corresponding to the two circular steel pipes (1), and adjust the pushing distance of the pushing rod of the jack (13) at each position according to the deviation value between the two roundness profiles; Step 8: Based on step 7, the contact area of ​​the two circular steel pipes (1) is welded, thereby completing the welding work of the two circular steel pipes (1) with the same axis and circularity.

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