A method for ensuring the concentricity of a rotary drum

Abstract

The application discloses a method for guaranteeing the concentricity of a rotary tank, and belongs to the technical field of rotary tank preparation. The method comprises three key procedures: firstly, the ellipticity of an inner cylinder is guaranteed by supporting the cylinder through a supporting round tool, and the straightness of the inner cylinder is guaranteed; then, the concentricity of a jacket cylinder and the inner cylinder is guaranteed by controlling the welding operation of the jacket cylinder and a blocking plate; finally, the concentricity of a head, a central shaft and the cylinder is guaranteed by real-time detection of the concentricity of the workpieces to be connected during assembly and real-time adjustment, and the concentricity of a rolling ring pad plate, a gear ring flange and the cylinder is guaranteed, so that the finally manufactured rotary tank has high-precision concentricity. The specific structure of the supporting round tool is provided, and a better supporting round effect can be achieved; a laser centering instrument for detecting the concentricity of the cylinder and the head and a concentricity adjusting device for real-time adjustment are provided, the position and the offset amount of the maximum head offset can be determined, based on which, the adjusting device can be adjusted in a targeted manner, and the adjusting distance is the shortest.

Description

Technical Field

[0001] This invention mainly relates to the field of rotary tank manufacturing technology, specifically a method for ensuring the concentricity of rotary tanks. Background Technology

[0002] The rotary tank is a core piece of equipment in the high-performance insoluble sulfur project. The product manufactured by this equipment is a raw material for tire production, with a broad market prospect. As this equipment is a moving device, the shell is equivalent to a giant rotating shaft, requiring high manufacturing precision. The axial and circumferential runout of the rolling rings, rotary joint flanges, and gear rings on the shell must be controlled within 1mm.

[0003] A rotary tank typically comprises, from the inside out, an inner cylinder, a rolling ring support ring, a jacketed cylinder, a rolling ring gasket, and a geared flange. The cylinder has end caps at both ends, with a central shaft at the center of each end cap. To ensure the concentricity of the rotary tank, the concentricity of all components and the straightness of the surfaces of the joined parts must be guaranteed. Current technologies require complex processes to achieve high-precision concentricity, which needs improvement. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic by providing a solution that is significantly different from existing technologies. It mainly provides a method for ensuring the concentricity of a rotary tank, thereby solving the problem mentioned in the background section that the process for ensuring the concentricity of a rotary tank in the prior art is quite complex.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A method for ensuring the concentricity of a rotary tank includes the following steps:

[0007] A. Ensure the straightness and ovality of the inner cylinder: After the inner cylinder is formed, use a rounding tool to round the inner cylinder; then, on a vertical lathe, align and verticalize the inner cylinder, machine the height allowance at both ends of the inner cylinder, and machine the welding bevel.

[0008] B. Ensure the concentricity of the jacket cylinder and the inner cylinder: First, weld the plug plate and the inner cylinder together. After welding, machine the outer diameter of the plug plate to the inner diameter of the jacket cylinder. Finally, weld the jacket cylinder and the plug plate together to ensure the concentricity of the jacket cylinder and the inner cylinder.

[0009] C. Ensure the concentricity of the rolling ring gasket, geared flange, end cap, central shaft, and cylinder: When assembling the inner cylinder and end cap, measure the concentricity between the end cap and cylinder during the process and adjust in real time according to the changes in concentricity; when assembling the central shaft and end cap, first align the central shaft, and during the welding process, monitor the concentricity between the central shaft and end cap in real time and adjust in real time according to the changes in concentricity; when cutting the geared flange and rolling ring gasket, leave machining allowance. After the equipment is assembled and welded, machine the rolling ring gasket and geared flange as a whole to ensure their concentricity with the cylinder.

[0010] Further, in process A, the circular support fixture includes four fan-shaped annular planar plates that can be assembled into a circular ring. Each fan-shaped annular planar plate has a curved panel on its outer arc side for attaching to the inner wall of the rotary tank. The cross-section of the curved panel and the fan-shaped annular planar plate is "T"-shaped. A sleeve with a circular cross-section is provided at the splice of each two adjacent fan-shaped annular planar plates. The inner wall of the sleeve is set to be conical. Each sleeve includes two equally divided semi-circular end faces of the semi-sleeve. The two semi-sleeves are respectively set on the two fan-shaped annular planar plates. The sleeve is provided with a pluggable inverted head. The end of the inverted head is set to be conical with the same conicity as the inner cone of the sleeve, and the other end is set as a screw.

[0011] Furthermore, in process A, four fan-shaped annular flat plates are first installed inside the inner cylinder. Then, the inverted head is inserted into the sleeve, and a nut is tightened at the threaded end of the inverted head. The conical part of the inverted head presses against the conical inner wall of the sleeve, so that the inverted head generates an outward pushing force on the corresponding two fan-shaped annular flat plates, thereby expanding the inner diameter of the tooling and achieving the purpose of rounding the inner cylinder.

[0012] Furthermore, in process A, a support fixture is arranged at each end of the inner cylinder, and a support fixture is also arranged at the rolling ring support ring of a single cylinder section to prevent deformation of the inner cylinder when the rolling ring support ring is welded to the fillet weld of the inner cylinder.

[0013] Furthermore, in process A, when beveling the ends of the inner cylinder, a 4mm blunt edge is left so that the two cylinder sections can be assembled based on the blunt edge; when beveling, the cylinder is milled to the same thickness as the end cap.

[0014] Furthermore, in process C, a laser alignment instrument is used to measure the concentricity between the end cap and the cylinder. The laser alignment instrument includes a laser emitter and a laser receiver using PSD positioning technology.

[0015] Furthermore, in process C, a concentricity adjustment device is used to adjust the end cap in real time. The concentricity adjustment device includes a fixed ring for fitting onto the outside of the cylinder. The fixed ring is provided with a positioning mechanism for achieving concentricity between the fixed ring and the cylinder. A rotating ring is rotatably connected to the fixed ring and rotates around the axis of the fixed ring. A first driving mechanism for driving the rotating ring to rotate is provided on the outside of the fixed ring. A push driving mechanism is fixedly connected to the rotating ring, and the working end of the push driving mechanism is connected to a push block for pushing the end cap. The laser alignment instrument, the first driving mechanism, and the push driving mechanism are all communicatively connected to the main controller. The first driving mechanism and the push driving mechanism control the driving process based on the detection results of the laser alignment instrument.

[0016] Furthermore, the positioning mechanism includes at least three screw holes equally spaced along the periphery of the fixed ring body, each screw hole being threaded with a clamping bolt, the end of the clamping bolt located inside the fixed ring body being connected to a clamping block, and the end of the clamping bolt located outside the fixed ring body being connected to a rotating block.

[0017] Furthermore, the rotating ring body is disposed inside the fixed ring body, and the inner surface of the fixed ring body is provided with an annular groove for the rotating ring body to rotate and a limiting ring groove connected to both sides of the annular groove. Both ends of the rotating ring body are provided with limiting ring bodies that are fitted into the limiting ring grooves.

[0018] Furthermore, the first driving mechanism includes a driving gear and a rotation driving mechanism for driving the driving gear to rotate. The fixed ring body has a connecting annular groove on one side that is directly opposite the notch of the driving gear. The outer arc surface of the rotating ring body is provided with a transmission gear ring that meshes with the driving gear. The rotation driving mechanism is fixedly installed on the fixed ring body. The extension and retraction path of the working end of the push driving mechanism is located in the radial direction of the fixed ring body. The push driving mechanism is connected to the inner ring surface of the rotating ring body through a connecting rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention provides three key processes to ensure the concentricity of a rotary tank during its production. First, the inner cylinder is elliptical by using a supporting tool to support the cylindrical body. Then, the straightness of the inner cylinder is ensured by using a vertical lathe to align the cylinder and machining the height allowance and welding bevels at both ends. Next, the concentricity of the jacket cylinder and the inner cylinder is ensured by controlling the welding operation of the jacket cylinder and the end plate. Finally, the concentricity of the end cap, central shaft, and cylinder is ensured by real-time detection and adjustment of the concentricity of the workpieces to be connected during assembly. Finally, the concentricity of the rolling ring gasket, gear ring flange, and cylinder is ensured by machining the entire assembly after welding. This results in a rotary tank with high-precision concentricity and a relatively simple process.

[0021] This invention also provides a specific structure for the rounding fixture, which consists of four fan-shaped annular flat plates spliced ​​together. The conical part of the inverted head presses against the conical inner wall of the sleeve, causing the inverted head to exert an outward pushing force on the corresponding two fan-shaped annular flat plates, thereby expanding the inner diameter of the fixture and achieving the purpose of rounding the inner cylinder. Furthermore, one end of the inverted head is equipped with a threaded screw. After the inverted head presses tightly against the sleeve, a nut is screwed onto the threaded part. The tight contact between the nut and the sleeve prevents the inverted head from loosening. Thus, a simple structure can achieve the positioning of the inverted head, ensuring the pushing effect of the inverted head on the fan-shaped annular flat plates, thereby ensuring the rounding effect of the rounding fixture on the inner cylinder.

[0022] This invention also provides a laser alignment instrument for measuring the concentricity between the end cap and the cylinder during the assembly and welding of the cylinder and end cap. The laser receiver of the laser alignment instrument adopts PSD positioning technology. Based on the current at both ends, the position where the laser hits the sensing surface can be calculated, and then the center offset direction and offset amount of the cylinder and end cap can be analyzed. Furthermore, since the PSD positioning technology detects the energy center of the laser, the position of the end cap with the greatest offset can be determined based on the detected offset direction, facilitating targeted adjustments by the concentricity adjustment device.

[0023] This invention also provides a concentricity adjustment device for real-time adjustment during the assembly and welding of the cylinder and end cap. Based on the measurement results of a laser alignment instrument, the rotation angle of the rotating ring is controlled by a rotation drive mechanism, causing the push drive mechanism and the push block to rotate to the offset position of the end cap. At this time, the push block is directly opposite the position of the end cap with the greatest offset. Then, the push drive mechanism controls the pushing process of the push block to push the end cap to be concentric with the cylinder. Thus, the push block of this adjustment device pushes and corrects the position of the end cap with the most prominent offset, which is highly targeted. Moreover, the fixed ring is concentric with the cylinder through a positioning mechanism, and the extension path of the working end of the push drive mechanism is located in the radial direction of the fixed ring, so that the extension path of the push block is located in the radial direction of the cylinder. This allows the end cap to move in alignment with the central axis of the cylinder without the need for compound movement, and the adjustment distance is minimized.

[0024] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 The drawing shows the circular support tooling used in the embodiments of the present invention;

[0026] Figure 2 The drawings show the inner cylinder's rounding and beveling in an embodiment of the present invention;

[0027] Figure 3 This is a welding diagram of the inner cylinder and the jacket cylinder in an embodiment of the present invention;

[0028] Figure 4This is a diagram showing the positions of the rolling ring pad, gear ring flange, and central shaft in an embodiment of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the concentricity adjustment device in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the three-dimensional structure of the fixed ring 1;

[0031] Figure 7 This is a side view of the concentricity adjustment device in an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Sectional view of section AA;

[0033] Figure 9 for Figure 8 A magnified schematic diagram of the structure of region A in the middle.

[0034] Figure label:

[0035] 1. Fixed ring; 2. Clamping bolt; 3. Rotating block; 4. Connecting rod; 5. Pushing drive mechanism; 6. Pushing block; 7. Rotating ring; 8. Clamping block; 9. Drive gear; 10. Round support fixture; 101. Fan-shaped annular flat plate; 102. Curved plate; 103. Sleeve; 104. Inverted head; 11. Rotation drive mechanism; 12. Screw hole; 13. Limiting ring groove; 14. Annular groove; 15. Notch; 16. Limiting ring. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0039] A method for ensuring the concentricity of a rotary tank includes the following steps:

[0040] 1. Ensure the straightness and ellipticity of the inner cylinder.

[0041] Inner cylinder preparation: After the materials pass inspection upon arrival at the factory, mark the cutting line and baseline for the cylinder, check the marked dimensions, and control the length and width error to within ±1mm, and the diagonal error to ≤2mm. During cylinder rolling, first use a plate rolling machine to guide the rolling process, and only proceed with rolling after confirming the edge curvature is acceptable. During the cylinder rounding process, it is required to control the longitudinal seam sides and the areas close to the filter screen holes and non-hole areas. During the rounding process, the ellipticity of the cylinder must be ≤10mm, and the edge angle ≤2mm.

[0042] Fabricating a circular fixture: such as Figure 1As shown, the circular support fixture 10 is manufactured according to the drawings. The circular support fixture 10 includes four fan-shaped annular planar plates 101 that can be assembled into a circular ring. Each fan-shaped annular planar plate 101 has a curved panel 102 on its outer arc side for attaching to the inner wall of the inner cylinder of the rotary tank. The cross-section of the curved panel 102 and the fan-shaped annular planar plate 101 is "T" shaped. At the joint of every two adjacent fan-shaped annular planar plates 101, there is a sleeve 103 with a circular cross-section. The inner wall of the sleeve 103 is set in a conical shape. Each sleeve 103 includes two equally divided semi-circular end faces of the semi-sleeves, and the two semi-sleeves are respectively set on the two fan-shaped annular planar plates 101. The sleeve 103 has a pluggable inverted head 104. The end of the inverted head 104 is set in a cone shape with the same conicity as the inner cone of the sleeve 103, and the other end is set as a screw. The outer diameter of the curved panel 102 is machined to match the inner diameter of the cylinder, with the tolerance controlled between -1 and 0 mm, to ensure that the outer surface of the tooling can fit tightly against the inner wall of the cylinder after it is rounded. The thickness of the fan-shaped annular flat plate 101 is 20mm, the inner arc diameter of the fan-shaped annular flat plate 101 is 2000mm, the thickness of the curved plate 102 is 25mm, and the outer circle (after machining) diameter of the curved plate 102 is 2400mm; the outer circle diameter of the sleeve 103 is 110mm, the diameter of the large hole end is 68mm, the diameter of the small hole end is 51mm, the height of the sleeve 103 is 60mm, the distance between the end face of the sleeve 103 and the corresponding side of the fan-shaped annular flat plate 101 is 20mm, and the distance between the central axes of the two opposing sleeves 103 is 2180mm; the height of the conical part of the inverted head 104 is 60mm, the large end diameter of the conical part of the inverted head 104 is 73mm, the small end diameter is 56mm, the height of the screw part is 80mm, and the thread specification is M48×3.

[0043] Controlling the ellipticity of the inner cylinder: The inner cylinder is rounded by first inserting the four-petal tooling into the inner cylinder, then inserting the inverted head 104 into the sleeve 103, and tightening it with a nut at the threaded end of the inverted head 104. The tapered portion of the inverted head 104 presses against the tapered inner wall of the sleeve 103, causing the inverted head 104 to exert an outward pushing force on the corresponding two fan-shaped annular flat plates 101, thereby expanding the inner diameter of the tooling and achieving the purpose of rounding the inner cylinder. Figure 2 As shown, a support fixture 10 is arranged at each of the two ends of the inner cylinder, and a support fixture 10 is arranged at the δ=50mm rolling ring support ring to prevent deformation of the inner cylinder when the rolling ring support ring is welded to the fillet weld of the inner cylinder.

[0044] Controlling the straightness of the inner cylinder: Mark the position lines of the roller support ring on the cylinder section and assemble the roller rings to prevent excessive assembly stroke of the roller support ring after the entire cylinder section is assembled, which could prevent smooth installation of the roller support ring. Align and ensure the verticality of the inner cylinder on a vertical lathe, machine the height allowance at both ends of the inner cylinder, machine the welding bevel, and simultaneously machine the outer diameter of the roller support ring to the dimensions required in the drawing. This ensures the flatness of the two end faces of the cylinder, thereby ensuring the straightness of the entire cylinder after the circumferential seam assembly and ensuring that the runout of the entire equipment is within the technical requirements. Figure 2 As shown, when beveling the ends of the inner cylinder, a 4mm blunt edge is left so that the blunt edge can be used as a reference when assembling the two cylinders. When beveling, the thickness difference between the cylinder and the end cap must be considered. The cylinder should be milled to the same thickness as the end cap, and the length should be at least three times the thickness difference between the two parts.

[0045] 2. Ensure the concentricity of the jacket cylinder and the inner cylinder.

[0046] like Figure 3 As shown in the drawing, the jacket cylinder is divided into upper and lower parts according to the requirements of the drawing. The upper part of the jacket is a large semicircle with a central angle of 255 degrees, and the lower part of the jacket is a small semicircle with a central angle of 91 degrees. After the jacket cylinder is assembled with the inner cylinder, a gap of 160mm is left on both sides of the upper and lower jackets, and both ends of the upper and lower jackets are connected to the inner cylinder through plug plates. During the manufacturing process, a certain allowance is left for the inner and outer diameters of the plug plates when they are cut. After cutting, the inner diameter of the plug plate is first machined to match the outer diameter of the inner cylinder. Then, the plug plate and the inner cylinder are welded together. After welding, the outer diameter of the plug plate is machined again to match the inner diameter of the jacket cylinder. Finally, the jacket cylinder and the plug plate are welded together to ensure the concentricity of the jacket cylinder and the inner cylinder.

[0047] 3. Ensure the concentricity of the rolling ring gasket, geared flange, end cap, central shaft, and cylinder.

[0048] The two ends of the cylinder are connected to end caps, and the center of the end caps is opened and connected to the central shaft. The cylinder is fitted with a rolling ring gasket and a toothed flange, etc.

[0049] First, when assembling the cylinder and the head, the blunt edge of the weld between the inner cylinder and the head is used as the reference. During the process, the concentricity between the head and the cylinder is measured and adjusted in real time according to the changes in concentricity to ensure the concentricity between the head and the cylinder.

[0050] Specifically, when assembling the cylinder and the end cap, the concentricity between the end cap and the cylinder is measured, and adjustments are made in real time based on changes in concentricity.

[0051] A laser alignment instrument is used, with a laser emitter installed at one inner centerline of the cylinder and head, and a laser receiver installed at the other inner centerline. The laser receiver employs PSD positioning technology. PSD technology involves applying an appropriate voltage to both ends of the sensing surface; different positions where the laser strikes the sensing surface will generate different currents at the two ends, which are then converted into digital signals by an analog-to-digital converter. Therefore, the position where the laser strikes the sensing surface can be calculated based on the current at both ends, allowing analysis of the center offset direction and amount of the cylinder and head. The detection results of the laser alignment instrument are transmitted to the main controller. Since PSD positioning technology detects the energy center of the laser, the position of the head with the greatest offset can be determined based on the detected offset direction.

[0052] Based on the above measurement results, a specially designed concentricity adjustment device is used to adjust the position of the end cap: such as Figure 5-9 As shown, the concentricity adjustment device includes a fixed ring 1, a clamping bolt 2, a rotating ring 7, a connecting rod 4, a pushing block 6, and a driving gear 9.

[0053] The fixing ring 1 is used to fit onto the outside of the cylinder. At least three screw holes 12 (four screw holes 12 in this embodiment) are equally spaced along the periphery of the fixing ring 1. Each screw hole 12 is threaded with a clamping bolt 2. The end of the clamping bolt 2 located inside the fixing ring 1 is connected to a clamping block 8. The end of the clamping bolt 2 located outside the fixing ring 1 is connected to a rotating block 3. By rotating the rotating block 3, the clamping bolt 2 is driven to rotate. Under the action of the screw holes 12, the clamping bolt 2 drives the clamping block 8 to move towards the inside of the fixing ring 1 until it abuts against the outer surface of the cylinder. After all four clamping blocks 8 abut against the outer surface of the cylinder, the fixing ring 1 and the cylinder are concentric.

[0054] The inner surface of one side of the fixed ring body 1 is provided with an annular groove 14 coaxially arranged with the fixed ring body 1 and a limiting ring groove 13 connected to both sides of the annular groove 14. The rotating ring body 7 is installed in the annular groove 14 and can rotate along the annular groove 14. Both ends of the rotating ring body 7 are provided with limiting ring bodies 16 that are locked in the limiting ring groove 13.

[0055] A connecting rod 4 extending to the outside of the fixed ring 1 is fixed on the inner ring surface of the rotating ring 7, and a push drive mechanism 5 is connected to the outer end of the connecting rod 4. The push drive mechanism 5 can be a hydraulic telescopic rod, and a push block 6 for pushing the end cap is connected to the working end of the push drive mechanism 5. The extension path of the working end of the push drive mechanism 5 is located radially on the fixed ring 1.

[0056] The outer arc surface of the rotating ring 7 is provided with a transmission gear ring. A notch 15 communicating with the annular groove 14 is provided on one side of the fixed ring 1. A drive gear 9, meshing with the transmission gear ring, is provided on the outer side of the fixed ring 1 corresponding to the notch 15. The drive gear 9 is connected to a rotation drive mechanism 11, which can be a servo motor. The rotation drive mechanism 11 is fixedly mounted on the fixed ring 1. In application, the main controller controls the control process of the rotation drive mechanism 11 based on the measurement results of the laser alignment instrument. The rotation drive mechanism 11 drives the drive gear 9 to rotate, and the drive gear 9 drives the rotating ring 7 to rotate through the transmission gear ring, controlling the rotation angle of the rotating ring 7 so that the push drive mechanism 5 and the push block 6 rotate to the offset position of the end cap. At this time, the push block 6 is directly opposite the position where the end cap is offset the most. The main controller then controls the control process of the push drive mechanism 5 based on the measurement results of the laser alignment instrument. The push drive mechanism 5 drives the push block 6 to push the end cap until the end cap is concentric with the cylinder.

[0057] The aforementioned concentricity adjustment device has a push block whose rotation trajectory is concentric with the cylinder. By driving the push block to rotate one revolution, the concentricity of the outer surface of the end cap can be detected. Other functions can be expanded through simple modifications to the push block.

[0058] When drilling holes in the end cap, plasma drilling is performed first. The hole size is required to be 10mm smaller on each side than the actual hole size. Then, the hole is machined to the actual hole size using a vertical lathe, and the welding bevel is machined. This is to ensure that the hole and the end cap are concentric. Then, when assembling the center shaft and the end cap, the center shaft is first aligned, and the concentricity between the center shaft and the end cap is monitored in real time during the welding process.

[0059] When cutting the gear ring flange, gear ring gasket, rolling ring gasket, and support ring on the central shaft, machining allowances are left. After the equipment is assembled and welded, the support fixture 10 is removed, and the rolling ring gasket, gear ring gasket, gear ring flange, and support ring on the central shaft are machined as a whole to ensure their concentricity with the cylinder.

[0060] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A method for ensuring the concentricity of a rotary tank, characterized in that: The process includes the following steps: A. Ensure the straightness and ellipticity of the inner cylinder: After the inner cylinder is formed, the inner cylinder is rounded using a rounding tool (10); then the inner cylinder is aligned and verticalized on a vertical lathe, the height allowance at both ends of the inner cylinder is machined, and the welding bevel is machined; B. Ensure the concentricity of the jacket cylinder and the inner cylinder: First, weld the plug plate and the inner cylinder together, then machine the outer diameter of the plug plate to the inner diameter of the jacket cylinder after welding, and finally weld the jacket cylinder and the plug plate together to ensure the concentricity of the jacket cylinder and the inner cylinder; C. Ensure the rolling ring pad Concentricity of plates, geared flanges, heads, central shafts, and cylinders: When assembling the inner cylinder and heads, the concentricity between the heads and cylinders is measured during the process, and adjustments are made in real time according to changes in concentricity; when assembling the central shaft and heads, the central shaft is first aligned, and during the welding process, the concentricity between the central shaft and heads is monitored in real time, and adjustments are made in real time according to changes in concentricity; the geared flanges and rolling ring gaskets are all left with machining allowances when cutting materials, and the rolling ring gaskets and geared flanges are machined as a whole after the equipment is assembled and welded to ensure their concentricity with the cylinder; In process C, a laser alignment instrument is used to measure the concentricity between the end cap and the cylinder. The laser alignment instrument includes a laser transmitter and a laser receiver using PSD positioning technology. In process C, a concentricity adjustment device is used to adjust the end cap in real time. The concentricity adjustment device includes a fixed ring (1) for fitting on the outside of the cylinder. The fixed ring (1) is provided with a positioning mechanism for achieving concentricity between the fixed ring (1) and the cylinder. A rotating ring (7) is rotatably connected to the fixed ring (1) and rotates around the axis of the fixed ring (1). A first driving mechanism for driving the rotating ring (7) to rotate is provided on the outside of the fixed ring (1). A push driving mechanism (5) is fixedly connected to the rotating ring (7), and a push block (6) for pushing the end cap is connected to the working end of the push driving mechanism (5). The laser alignment instrument, the first driving mechanism and the push driving mechanism (5) are all connected to the main controller. The first driving mechanism and the push driving mechanism (5) control the driving process according to the detection result of the laser alignment instrument.

2. The method for ensuring the concentricity of a rotary tank according to claim 1, characterized in that: In process A, the circular support fixture (10) includes four fan-shaped annular planar plates (101) that can be assembled into a circular ring. Each fan-shaped annular planar plate (101) has a curved panel (102) on its outer arc side for attaching to the inner wall of the inner cylinder of the rotary tank. The cross-section of the curved panel (102) and the fan-shaped annular planar plate (101) is "T". A sleeve (103) with a circular cross-section is provided at the splice of each two adjacent fan-shaped annular planar plates (101). The inner wall of the sleeve (103) is set in a conical shape. Each sleeve (103) includes two equally divided semi-circular end faces of the half sleeve. The two half sleeves are respectively set on the two fan-shaped annular planar plates (101). The sleeve (103) is provided with a pluggable inverted head (104). The end of the inverted head (104) is set in a cone shape with the same cone diameter as the inner cone of the sleeve (103). The other end is set as a screw.

3. The method for ensuring the concentricity of a rotary tank according to claim 2, characterized in that: In process A, four fan-shaped annular flat plates (101) are first installed inside the inner cylinder. Then, the invert (104) is inserted into the sleeve (103) and tightened with a nut at the threaded end of the invert (104). The conical part of the invert (104) squeezes the conical inner wall of the sleeve (103), so that the invert (104) generates an outward pushing force on the corresponding two fan-shaped annular flat plates (101), thereby expanding the inner diameter of the tooling and achieving the purpose of rounding the inner cylinder.

4. The method for ensuring the concentricity of a rotary tank according to claim 1, characterized in that: In process A, a support fixture (10) is arranged at each end of the inner cylinder, and a support fixture (10) is also arranged at the rolling ring support ring of a single cylinder section to prevent deformation of the inner cylinder when the rolling ring support ring is welded to the fillet weld of the inner cylinder.

5. The method for ensuring the concentricity of a rotary tank according to claim 1, characterized in that: In process A, when beveling the two ends of the inner cylinder, a 4mm blunt edge is left so that the two cylinder sections can be assembled based on the blunt edge; when beveling, the cylinder is milled to the same thickness as the end cap.

6. The method for ensuring the concentricity of a rotary tank according to claim 1, characterized in that: The positioning mechanism includes at least three screw holes (12) evenly spaced along the periphery of the fixed ring (1). Each screw hole (12) is threaded with a clamping bolt (2). The end of the clamping bolt (2) located inside the fixed ring (1) is connected to a clamping block (8), and the end of the clamping bolt (2) located outside the fixed ring (1) is connected to a rotating block (3).

7. The method for ensuring the concentricity of a rotary tank according to claim 1, characterized in that: The rotating ring (7) is located inside the fixed ring (1). The inner surface of the fixed ring (1) is provided with an annular groove (14) for the rotating ring (7) to rotate and a limiting ring groove (13) connected to both sides of the annular groove (14). Both ends of the rotating ring (7) are provided with limiting rings (16) that are fitted into the limiting ring grooves (13).

8. The method for ensuring the concentricity of a rotary tank according to claim 7, characterized in that: The first driving mechanism includes a driving gear (9) and a rotating driving mechanism (11) for driving the driving gear (9) to rotate. The fixed ring body (1) has a connecting annular groove (14) on one side and a notch (15) facing the driving gear (9). The outer arc surface of the rotating ring body (7) is provided with a transmission gear ring that meshes with the driving gear (9). The rotating driving mechanism (11) is fixedly installed on the fixed ring body (1). The extension path of the working end of the push driving mechanism (5) is located in the radial direction of the fixed ring body (1). The push driving mechanism (5) is connected to the inner ring surface of the rotating ring body (7) through a connecting rod (4).

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