A Double Tube Sheet Tube Hole Welding Alignment Control Device and Its Usage Method

Abstract

The present invention discloses a control device and a usage method for the alignment of tube holes in double tube sheets, belonging to the technical field of heat exchangers. The device includes a welding platform, a laser alignment system, and an alignment control system. The alignment control system is placed on the welding platform and includes a tube sheet support and adjustment system and a connecting sleeve support and adjustment system. The tube sheet support and adjustment system is arranged around the double tube sheets and is used to support the double tube sheets and adjust the position of the double tube sheet assembly. The connecting sleeve support and adjustment system is arranged below the connecting sleeve and is used to support the connecting sleeve and adjust the height of the connecting sleeve. The laser alignment system is arranged on the tube sheet to measure the alignment of the tube holes in the double tube sheets. The present invention can solve the alignment problem of circumferentially distributed tube holes in thick tube sheets, and at the same time can monitor the welding deformation of subsequent components, ensuring that the coaxiality can still meet the high-precision requirements after the long-distance welding of the double tube sheets.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and particularly relates to a double tube sheet tube hole welding alignment control device and a using method thereof. Background Art

[0002] With the development of science and technology, heat exchangers, as special equipment for medium heat exchange, are widely used in industries such as petroleum, chemical industry, pharmaceuticals, and nuclear power. Since the shell-side material and the tube-side material of the traditional fixed tube sheet heat exchanger with a single tube sheet structure are separated by one tube sheet, such a setting is likely to cause mixing and leakage between the shell-side material and the tube-side material. Therefore, currently, a fixed tube sheet heat exchanger with a double tube sheet structure is often used, and one of the two tube sheets is used to seal the shell-side material and the tube-side material respectively between the shell-side material and the tube-side material to avoid mixing and leakage between the shell-side material and the tube-side material. However, when installing the double tube sheet, tube hole alignment is required to ensure the normal threading of subsequent heat exchange tubes and the welding quality of other components.

[0003] Commonly used tube hole alignment measurement methods include wire measurement, dial indicator measurement, theodolite measurement, etc.; wire measurement is to pull a wire near the element to be measured, and determine the alignment situation by measuring the direct distance, diagonal angle, etc. of the wire, which is mainly applicable to workpieces with large sizes and low measurement accuracy requirements; dial indicator measurement is based on the already machined reference hole and reference surface, and locates the position of the target tube hole through a high-precision mold, which is mainly applicable to workpieces with high precision requirements and small sizes; theodolite measurement is an optical measurement method, applicable to the measurement of workpieces with larger sizes, and the accuracy is generally at the millimeter level. For a double tube sheet structure with a large size, the two tube sheets are fixed by a connecting sleeve, the tube sheet is generally more than 300 mm thick, and nearly 6000 tube holes are distributed annularly on the tube sheet, and the coaxiality requirement of the tube sheet is Φ1 mm, that is, the alignment degree of all tube holes is within φ1 mm. Under this accuracy requirement, the accuracy of wire measurement and theodolite measurement does not meet the requirements; there is no ready-made tooling for dial indicator measurement, and it is difficult to ensure the measurement accuracy under this workpiece size, and the alignment situation of the tube holes cannot be checked. Moreover, the double tube sheet assembly material is stainless steel, and two circumferential welds need to be welded after assembly. The stainless steel has a large welding deformation, and the slight deformation of the circumferential weld will be amplified again on the total length of 7 m, and it is very likely that the tube hole alignment exceeds φ1 mm. Summary of the Invention

[0004] In view of this, the present invention provides a double tube sheet tube hole welding alignment control device, which solves the alignment problem of circumferentially distributed tube holes of a thick tube sheet, and at the same time can monitor the welding deformation of subsequent components, ensuring that the coaxiality can still meet the high-precision requirements after long-distance double tube sheet welding.

[0005] The present invention is realized by the following technical solutions:

[0006] A double-tube-sheet tube hole welding alignment control device, comprising a welding platform, a laser alignment system and an alignment control system; the alignment control system is placed on the welding platform, and it includes a tube sheet support adjustment system and a connecting sleeve support adjustment system. The tube sheet support adjustment system is arranged around the double-tube sheet, and it is used to support the double-tube sheet and adjust the position of the double-tube sheet assembly. The connecting sleeve support adjustment system is arranged below the connecting sleeve, and it is used to support the connecting sleeve and adjust the height of the connecting sleeve; the laser alignment system is arranged on the tube sheet to measure the alignment condition of the double-tube sheet tube holes.

[0007] Compared with the prior art, the present invention has at least the following technical effects:

[0008] The present invention measures the alignment condition of the double-tube sheet tube holes by adopting a laser alignment system, and at the same time sets a tube sheet support adjustment system and a connecting sleeve support adjustment system. According to the measured alignment condition of the tube holes, the positions, heights, etc. of the double-tube sheet and the connecting sleeve are adjusted to realize the control of the alignment accuracy of the double-tube sheet tube holes, so that the alignment dimensions of the double-tube sheet assembly after welding can meet the assembly requirements of the double-tube sheet assembly with heat exchange tubes and other components finally.

[0009] Furthermore, the laser alignment system includes a laser emitter, a laser receiver, a fixing tooling and a fixing component. The fixing tooling includes a emitter fixing tooling and a receiver fixing tooling. The emitter fixing tooling is installed on one side of the tube sheet through the fixing component, and the receiver fixing tooling is installed at the corresponding position on the other side of the tube sheet; the laser emitter and the laser receiver are respectively installed on the emitter fixing tooling and the receiver fixing tooling.

[0010] Furthermore, the fixing component includes a fixing rod, a fixing nut, a limiting ring and an elastic limiting ring; the fixing rod is divided into a fastening end and an adjusting end with threads. The fastening end of the fixing rod penetrates into the tube hole, and the adjusting end passes through the emitter fixing tooling; the elastic limiting ring is sleeved on the fastening end of the fixing rod; the limiting ring is sleeved on the adjusting end of the fixing rod, and its outer wall is engaged with the emitter fixing tooling, and one end of it abuts against the elastic limiting ring; the fixing nut is detachably fixed on the adjusting end of the fixing rod.

[0011] Furthermore, a positioning block is arranged on the emitter fixing tooling. A positioning groove is opened on the positioning block, and a positioning bolt for fastening the laser emitter is arranged in the positioning groove; and a plurality of adjusting bolts for adjusting the laser direction of the laser emitter are arranged in the circumferential direction of the positioning block. A limiting convex block is arranged on the end surface facing the tube sheet, and the limiting convex block penetrates into the tube hole and has an interference fit with the tube hole.

[0012] Further, the device further includes a laser tracker, which is arranged on the welding platform. During the welding process, an ultra-precise laser tracker is used to correct and recheck the laser monitoring situation to ensure the measurement accuracy.

[0013] Further, the tube sheet support adjustment system includes a plurality of supports and jacks for adjusting the position of the double tube sheets. The supports are arranged on the welding platform around the double tube sheets, and the jacks are arranged on the top of any one of the supports. The tube sheet support adjustment system is arranged around the double tube sheets to support the tube sheets on one hand and adjust the position and height of the tube sheets on the other hand to ensure the coaxiality of the tube holes of the tube sheets.

[0014] Further, the connecting sleeve support adjustment system includes a padding support, a V-shaped support and a gasket or a jack; the padding support is placed on the welding platform, the V-shaped support is placed on the top of the padding support, and the gasket or the jack is placed on the top of the V-shaped support and abuts against the bottom of the connecting sleeve. During the welding process of the tube sheet, when the coaxiality of the tube holes does not meet the requirements, the height of the connecting sleeve support adjustment system is adjusted, thereby affecting the height of the connecting sleeve to avoid deformation.

[0015] Based on the above device, the present invention further provides a method for using a double tube sheet tube hole welding alignment control device, including the following steps:

[0016] S1: Install the tube sheet support adjustment system, the connecting sleeve support adjustment system and the laser tracker on the welding platform, and install the laser alignment system on the double tube sheets;

[0017] S2: Move the double tube sheets and the connecting sleeve to the corresponding positions on the welding platform, preliminarily align the double tube sheets, and level the connecting sleeve;

[0018] S3: Start the laser tracker, measure the alignment of the tube holes of the double tube sheets, and adjust the alignment accuracy of the tube holes to meet the requirements;

[0019] S4: Spot weld and fix the double tube sheets and the connecting sleeve to complete the alignment welding of the double tube sheet assembly.

[0020] Further, in step S4, the weld seams of the double tube sheet assembly are welded in a symmetric welding manner.

[0021] Further, in step S4, during the welding process of the double tube sheet assembly, the laser tracker is used to verify and recheck the results of the laser alignment system.

[0022] The present invention also has the following technical effects:

[0023] The double tube sheet tube hole welding alignment control device and its usage method of the present invention are particularly applicable to the long-distance tube hole alignment welding of large-thickness tube sheets, and can well solve the alignment problem of the circumferentially distributed tube holes of the double tube sheets, achieving the alignment accuracy control of the double tube sheet assembly with long spans and multiple tube holes to reach φ1mm, and can be used for various long-size and high-precision tube hole alignment and real-time monitoring.

[0024] The laser alignment system of the present invention can continuously monitor the double tube sheet welding process, adjust the welding sequence in real time according to the monitoring situation, control the welding deformation, and ensure the coaxiality of the tube sheet tube holes after the long-distance double tube sheet welding. Brief Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a large-size double tube sheet assembly in the prior art.

[0026] Figure 2 It is an installation schematic diagram of the double tube sheet tube hole welding alignment control device of the present invention.

[0027] Figure 3 It is an installation schematic diagram of the laser alignment system in the double tube sheet tube hole welding alignment control device of the present invention.

[0028] Figure 4 It is an installation and positioning schematic diagram of the laser emitter in the double tube sheet tube hole welding alignment control device of the present invention.

[0029] Figure 5 It is a schematic structural diagram of the connecting sleeve support adjustment system in the double tube sheet tube hole welding alignment control device of the present invention.

[0030] Among them, in the brief description of the drawings, 1 - upper tube sheet; 2 - lower tube sheet; 3 - connecting sleeve; 4 - welding platform; 5 - support; 6 - connecting sleeve support adjustment system; 7 - laser alignment system; 8 - laser tracker; 11 - upper tube sheet tube hole; 61 - elevation support; 62 - V-shaped support; 63 - gasket; 71 - emitter fixing tooling; 72 - laser emitter; 73 - laser receiver; 74 - fixing rod; 75 - elastic limit ring; 76 - limit ring; 77 - fixing nut; 78 - positioning block; 781 - positioning groove; 782 - positioning bolt; 783 - adjustment bolt; 784 - limit projection. Detailed Embodiments

[0031] For the convenience of understanding the present invention, the following will describe the present invention more comprehensively and meticulously in conjunction with the specification drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0032] In the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0033] This embodiment provides a double tube sheet tube hole welding alignment control device, which is applicable to the long-distance tube hole alignment welding of large-thickness double tube sheets. The structure of the double tube sheet assembly is as Figure 1 shown, which includes an upper tube sheet 1, a lower tube sheet 2, and a connecting sleeve 3. The thicknesses of both the upper tube sheet 1 and the lower tube sheet 2 exceed 300 mm, and nearly 6000 tube holes are distributed annularly on the tube sheets; the upper tube sheet 1 and the lower tube sheet 2 need to be welded and connected by the connecting sleeve 3. The length of the connecting sleeve 3 is about 6 m, and the coaxiality requirement between the upper and lower tube sheets is φ1 mm.

[0034] Please refer to Figure 2 , the control device of this embodiment includes a welding platform 4, a laser alignment system 7, and an alignment control system. The laser alignment system 7 is arranged on the tube holes of the tube sheets. The laser is emitted from the tube holes of one side tube sheet and received at the tube holes of the other side tube sheet. The laser alignment system 7 can directly display the coaxiality deviation numerically; the alignment control system is installed below the upper tube sheet 1, the lower tube sheet 2, and the connecting sleeve 3, and adjusts the alignment of the tube holes of the tube sheets according to the displayed data.

[0035] Specifically, as Figure 3 and Figure 4As shown in the figure, the laser alignment system 7 includes a laser transmitter 72, a laser receiver 73, a fixing tooling, and several fixing components; the fixing tooling includes a transmitter fixing tooling 71 and a receiver fixing tooling. The transmitter fixing tooling 71 is installed on the side of the upper tube sheet 1 facing away from the lower tube sheet 2, and is fixedly connected to the upper tube sheet 1 through the fixing components; the fixing components include a fixing rod 74, a fixing nut 77, a limiting ring 76, and an elastic limiting ring 75. The fixing rod 74 is divided into a fastening end and an adjusting end. A thread corresponding to the fixing nut 77 is provided on the rod body of the adjusting end. The elastic limiting ring 75 is sleeved on the fastening end of the fixing rod 74, and the fastening end of the fixing rod 74 penetrates into the corresponding upper tube sheet hole 11. The adjusting end of the fixing rod 74 passes through the transmitter fixing tooling 71. The limiting ring 76 is sleeved on the adjusting end of the fixing rod 74, and its outer wall is in close contact with the transmitter fixing tooling 71. A flange for abutting against the transmitter fixing tooling 71 is provided at the left end of the limiting ring 76, and its right end abuts against the elastic limiting ring 75. The fixing nut 77 is sleeved on the adjusting end of the fixing rod 74 and abuts against the flange of the limiting ring 76; at the same time, a flange is provided on the side wall of the transmitter fixing tooling 71 abutting against the limiting ring 76, which is engaged and fixed with the limiting ring 76 to prevent the limiting ring 76 from moving along with the fixing rod 74. When the fixing nut 77 is screwed in the direction of the tube hole, due to the existence of the limiting ring 76, the fixing nut 77 remains stationary. The fixing rod 74 is driven by the fixing nut 77 and has a tendency to move leftward out of the upper tube sheet hole 11. At this time, the elastic limiting ring 75 also moves leftward along with the fixing rod 74, but the elastic limiting ring 74 is abutted by the limiting ring 76 and cannot move further, stacking in the upper tube sheet hole 11, thereby realizing the expansion of the diameter of the elastic limiting ring 75, so that the combination of the fixing rod 74 and the elastic limiting ring 75 can expand and tighten the upper tube sheet hole 11, and further fix the transmitter fixing tooling 71 to the upper tube sheet 1.

[0036] Inside the emitter fixing tooling 71, there is a positioning block 78. The function of the positioning block 78 is to position the laser emitter 72, and at the same time play a role in converging the laser beam, ensuring that the light source is thin enough and emits from the center of the tube hole. A positioning groove 781 allowing the insertion of the laser emitter 72 is provided at the middle position of the positioning block 78, and a positioning bolt 782 is provided on the groove wall near the bottom of the positioning groove 781. When the laser emitter 72 is inserted into the positioning groove 781, the positioning bolt 782 locks and positions the laser emitter 72. And a plurality of mutually corresponding adjusting bolts 783 are provided in the circumferential direction of the positioning block 78. One end of the adjusting bolt 783 penetrates into the positioning groove 781, and the laser emitter 72 is clamped by adjusting the screwing length of the adjusting bolt 783, so as to adjust the laser emission direction of the laser emitter 72, ensure that the laser is concentric with the tube hole, and avoid the deviation of the laser emission direction of the laser emitter 72. In addition, a limiting convex block 784 is provided on the end face of the positioning block 78 facing the tube hole 11 of the upper tube sheet. The limiting convex block 784 penetrates into the corresponding tube hole 11 of the upper tube sheet to fix the position of the positioning block 78, and the limiting convex block 784 and the tube hole 11 of the upper tube sheet adopt an interference fit.

[0037] The laser receiver 73 is fixedly installed on the corresponding tube hole of the lower tube sheet 2 through the receiver fixing tooling. The structure of the receiver fixing tooling in this embodiment is not limited, and it can be common fixing rods, fixing bolts, etc. As long as the receiver fixing tooling can fix the laser receiver 73 on the corresponding tube hole of the lower tube sheet 2, ensure that the laser receiver 73 corresponds to the laser emitter 72, and the laser receiver 73 can receive the laser signal emitted by the laser emitter 72.

[0038] In this embodiment, the fixing rod 74 adopts a pull rod. The elastic limiting ring 75 includes a plastic ring 752 and a rubber ring 751. The plastic ring 751 and the rubber ring 751 are sleeved on the pull rod at intervals. After the installation is completed, the fixing nut 77 is screwed, so that the pull rod extends leftward. The plastic ring 752 and the rubber ring 751 tend to move leftward, but due to the existence of the limiting ring 76, they cannot move further, so as to expand the diameters of the plastic ring 752 and the rubber ring 751, ensure that the combination of the pull rod, the plastic ring 752 and the rubber ring 751 can expand and tighten the tube hole 11 of the upper tube sheet, thereby realizing the fixation of the emitter fixing tooling 71 and the upper tube sheet 1.

[0039] Specifically, as Figure 2 and Figure 5As shown in the figure, the centering control system includes a tube sheet support adjustment system and a connecting sleeve support adjustment system 6. The function of the tube sheet support adjustment system is to support the upper and lower tube sheets and adjust the positions of the upper and lower tube sheets. It includes a plurality of supports 5 and jacks. The supports 5 are respectively arranged on the welding platform 4 around the upper tube sheet 1 and the lower tube sheet 2, and the jacks are arranged on the top surfaces of the supports 5. By applying force in the horizontal or height direction with the jacks, the coaxiality of the tube holes of the upper and lower tube sheets can be adjusted. The function of the connecting sleeve support adjustment system 6 is to support the connecting sleeve 3 and adjust the height of the connecting sleeve 3. It includes a heightening support 61, a V-shaped support 62 and a plurality of gaskets 63. The bottom of the heightening support 61 is provided with rollers for easy movement, and it is placed on the welding platform 4. The two feet of the V-shaped support 62 are inversely arranged on the top of the heightening support 61, and the gasket 63 is placed on the top of the V-shaped support 62 and abuts against the bottom of the connecting sleeve 3. When welding the double tube sheet assembly, if the coaxiality of the tube holes is too deviated, the overall height of the gasket 63 can be adjusted by increasing the number of gaskets 63, so as to adjust the orientation of the connecting sleeve 3, and then affect and adjust the coaxiality of the tube holes of the double tube sheet assembly. In other embodiments, a jack can be arranged on the top of the V-shaped support 62 to accurately adjust and position the connecting sleeve 3.

[0040] In this embodiment, as Figure 2 shown, a laser tracker 8 is also arranged on the welding platform 4 to correct and review the laser monitoring situation to ensure the measurement accuracy.

[0041] Based on the above scheme, the using process of the device in this embodiment includes the following steps:

[0042] S1: Install the tube sheet support adjustment system, the connecting sleeve support adjustment system 6 and the laser tracker 8 on the welding platform 4; install a transmitter fixing tooling 71 and a laser transmitter 72 on the tube holes 11 of the upper tube sheet, install a laser receiver 73 on the corresponding tube holes of the lower tube sheet, and then adjust the received value of the laser receiver 73 to be consistent with the measurement result of the laser tracker 8;

[0043] S2: Move the connecting sleeve 3 into place to the connecting sleeve support adjustment system 6 for leveling, and at the same time place the upper tube sheet 1 and the lower tube sheet 2 on the tube sheet support adjustment system, and preliminarily adjust the upper tube sheet 1 and the lower tube sheet 2 to be aligned.

[0044] S3: Start the laser tracker 8, measure the centering situation of the tube holes of the upper tube sheet 1 and the lower tube sheet 2, and adjust the centering accuracy of the tube holes to meet the requirements.

[0045] S4: Spot-weld and fix the upper tube sheet 1, the lower tube sheet 2 and the connecting sleeve 3, and adjust the welding sequence in real time according to the data change situation of the laser centering system 7 to ensure the coaxiality of the tube holes of the upper and lower tube sheets;

[0046] S5: After completing the centering adjustment, during the welding process, use the laser tracker 8 to verify and recheck the results of the laser centering system to ensure the measurement accuracy.

[0047] During the above use process, the welds of the double tube sheet assembly are welded in a symmetric welding manner, and the welding sequence is adjusted according to the values of the laser centering system 7 to ensure that the coaxiality of the tube holes of the tube sheet meets the requirements.

[0048] Compared with the prior art, the double tube sheet hole alignment welding centering control device and the using method provided by the present invention adopt high-precision optical instruments such as the laser emitter 72, the laser receiver 73 and the laser tracker 8 to cooperate with assembly tooling such as the centering control system to measure the centering of the double tube sheet holes, solve the centering problem of the circumferentially distributed tube holes, control the centering accuracy of the 7m long span and 6000 pairs of tube holes between the double tube sheets to reach φ1mm, and at the same time monitor the deformation condition during the welding process of the double tube sheets. After the long-distance double tube sheet welding and assembly, the coaxiality can still meet the high-precision requirements.

[0049] The device and the using method of the present invention are applied to the centering welding process of two double tube sheet assemblies in a certain project, and the centering dimensions after the welding and assembly can meet the assembly requirements of the double tube sheet assemblies with the heat exchange tubes and the remaining components finally.

[0050] The above are only some embodiments of the present invention, and thus do not limit the implementation manners and the protection scope of the present invention. For those skilled in the art, it should be able to realize that the solutions obtained by equivalent replacement and obvious changes made by using the content of the specification of the present invention should be included in the protection scope of the present invention.

Claims

1. A double tube sheet tube hole welding alignment control device, characterized in that, It includes a welding and fitting platform, a laser alignment system, and an alignment control system; the alignment control system is placed on the welding and fitting platform and includes a tube sheet support adjustment system and a connecting sleeve support adjustment system. The tube sheet support adjustment system is arranged around the double tube sheet and is used to support the double tube sheet and adjust its position. The connecting sleeve support adjustment system is arranged below the connecting sleeve and is used to support the connecting sleeve and adjust its height; the laser alignment system is arranged on the tube sheet to measure the alignment of the tube holes of the double tube sheet; The laser alignment system includes a laser emitter, a laser receiver, a fixing tooling, and a fixing component. The fixing tooling includes a transmitter fixing tooling and a receiver fixing tooling. The transmitter fixing tooling is installed on one side of the tube sheet through the fixing component, and the receiver fixing tooling is installed at the corresponding position on the other side of the tube sheet; the laser emitter and the laser receiver are respectively installed on the transmitter fixing tooling and the receiver fixing tooling; The fixing component includes a fixing rod, a fixing nut, a limiting ring, and an elastic limiting ring; the fixing rod is divided into a fastening end and an adjusting end with threads. The fastening end of the fixing rod penetrates into the tube hole, and the adjusting end passes through the transmitter fixing tooling; the elastic limiting ring is sleeved on the fastening end of the fixing rod; the limiting ring is sleeved on the adjusting end of the fixing rod, and its outer wall is engaged with the transmitter fixing tooling, and one end of it abuts against the elastic limiting ring; the fixing nut is detachably fixed on the adjusting end of the fixing rod.

2. The double tube sheet tube hole welding alignment control device according to claim 1, characterized in that, The transmitter fixing tooling is provided with a positioning block. The positioning block is provided with a positioning groove, and a positioning bolt for fastening the laser emitter is arranged in the positioning groove; and a plurality of adjusting bolts for adjusting the laser direction of the laser emitter are arranged in the circumferential direction of the positioning block. The end surface thereof facing the tube sheet is provided with a limiting convex block, and the limiting convex block penetrates into the tube hole and has an interference fit with the tube hole.

3. The double tube sheet tube hole welding alignment control device according to claim 1, characterized in that, It further includes a laser tracker, and the laser tracker is arranged on the welding and fitting platform.

4. The double tube sheet tube hole welding alignment control device according to claim 1, characterized in that, The tube sheet support adjustment system includes a plurality of supports and a jack for adjusting the position of the double tube sheet. The supports are arranged on the welding and fitting platform around the double tube sheet, and the jack is arranged on the top of any one of the supports.

5. The double tube sheet tube hole welding alignment control device according to claim 1, characterized in that, The connecting sleeve support adjustment system includes a heightening support, a V-shaped support, and a gasket or a jack; the heightening support is placed on the welding and fitting platform, the V-shaped support is placed on the top of the heightening support, and the gasket or the jack is placed on the top of the V-shaped support and abuts against the bottom of the connecting sleeve.

6. A method for using the double tube sheet tube hole welding alignment control device according to any one of claims 1-5, characterized in that, It includes the following steps: S1: Install the tube sheet support adjustment system, the connecting sleeve support adjustment system, and the laser tracker on the welding and fitting platform, and install the laser alignment system on the double tube sheet; S2: Move the double tube sheet and the connecting sleeve to the corresponding positions on the welding and fitting platform, preliminarily align the double tube sheet, and level the connecting sleeve; S3: Start the laser tracker, measure the alignment of the tube holes of the double tube sheet, and adjust the alignment accuracy of the tube holes to meet the requirements; S4: Spot-weld and fix the double tube sheet and the connecting sleeve to complete the alignment welding of the double tube sheet assembly.

7. The method for using according to claim 6, characterized in that, In step S4, the weld of the double tube sheet assembly is welded by a symmetric welding method.

8. The method for using according to claim 6, characterized in that, In step S4, during the welding process of the double tube sheet assembly, a laser tracker is used to verify and recheck the results of the laser alignment system.

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