Manufacturing method of pump tower base and pump tower base

Abstract

The invention belongs to the technical field of manufacturing of large industrial pump tower supporting structures, and provides a manufacturing method of a pump tower base and the pump tower base. The manufacturing method comprises the steps that S1, all parts are blanked; s2, assembling and welding the upper barrel and the upper barrel partition plate; s3, a longitudinal seam is welded after the lower conical cylinder is rolled; s4, inner holes of the upper flange plate and the lower flange plate are pre-machined; s5, a first guide block and a second guide block are prefabricated; s6, the upper cylinder body and the lower conical cylinder are concentrically assembled; s7, an upper flange plate, a lower flange plate, a conical cylinder upper partition plate, a conical cylinder lower partition plate and a conical cylinder welding gasket are sequentially assembled; s8, a guide block is welded to the outer side of the upper barrel; and S9, machining is carried out with the upper surface of the upper flange plate as the reference. Compared with the prior art, the method has the following beneficial effects that all assemblies of the pump tower base are prefabricated step by step, assembled and welded in order, and shaping and nondestructive testing are conducted alternately after key procedures, so that high controllability and high consistency of structure manufacturing are achieved.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology of large industrial pump tower support structures, specifically relating to a method for manufacturing a pump tower base and the pump tower base itself. Background Technology

[0002] Pump tower units are widely used in large-scale industrial fluid transport systems. Their core function is to provide a high-rigidity and high-stability support structure for vertical pump units, and to ensure that the pump body has precise vertical positioning and thermal expansion compensation capabilities during operation. As a key connecting component between the pump tower and the foundation structure, the pump tower base must not only withstand the static loads and dynamic vibrations of the pump unit, but also maintain structural integrity and geometric accuracy under extreme conditions (such as earthquakes, thermal shock, or corrosive environments).

[0003] In existing technologies, pump tower bases typically employ a segmented welded structure, consisting of a cylindrical body, a conical section, flange plates, and internal reinforcing baffles. However, traditional manufacturing methods suffer from the following prominent problems:

[0004] First, controlling welding deformation is challenging. Due to the complex structure and dense welds of the pump tower base, especially at the circumferential seams between the cylinder and cone, and the connection between the flange and cylinder, improper welding sequence or process parameters can easily lead to dimensional deviations, affecting the coaxiality and verticality of the subsequent pump installation. Although some solutions employ segmented back-welding or pre-deformation measures, effective control methods are still lacking for the integration of high-precision guiding components (such as guide blocks).

[0005] Secondly, the integration of the guide structure is poor. To achieve rapid installation and thermal displacement guidance of the pump tower column, existing bases often have sliding guide blocks at the bottom. However, these guide blocks are mostly fixed by bolt connections or subsequent welding, resulting in insufficient rigidity, easy loosening, and rapid wear. More importantly, if the guide block and the main load-bearing structure (such as the cylinder) are not integrally formed during the manufacturing stage, their positional accuracy is difficult to guarantee, leading to uneven loading or jamming during pump tower operation.

[0006] Secondly, the manufacturing process lacks systematic quality control. Traditional processes often perform machining only after welding, neglecting non-destructive testing and deformation correction in intermediate stages, resulting in high cost and long turnaround times for defect repair. Furthermore, for critical welds with full penetration, conventional methods only employ localized ultrasonic or radiographic sampling, which is insufficient to meet the 100% reliability requirements of high-safety-level scenarios such as nuclear power plants. In addition, the sealing performance of internal partition welds is often overlooked, potentially leading to media leakage or corrosion risks during service.

[0007] Finally, the material allowance and machining datum are not consistent. If a reasonable machining allowance is not reserved during the blanking and rough machining stages, or if a unified finishing datum is not established, the cumulative error during final assembly will exceed the standard, affecting the overall alignment performance of the pump tower.

[0008] To address the aforementioned issues, there is an urgent need for a high-precision and high-reliability pump tower base manufacturing method. This method can achieve fully controllable manufacturing from raw materials to finished products by optimizing material allowances, standardizing welding sequences, strengthening process inspection, integrating guide structures, and using specialized tooling to control deformation. This will meet the comprehensive requirements of high-end equipment for structural stability, guiding accuracy, and long-term sealing. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method for manufacturing a pump tower base and a pump tower base in view of the current state of the prior art.

[0010] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a method for manufacturing a pump tower base is proposed, including the following steps: S1, cutting out each component of the upper cylinder, lower cone, upper flange plate, lower flange plate, upper cylinder partition plate, upper cone partition plate, lower cone partition plate, cone welding gasket and guide block respectively;

[0011] S2. Assemble and weld the upper cylinder body and the upper cylinder body partition, and then shape and perform non-destructive testing after welding.

[0012] S3. After rolling the lower cone, weld the longitudinal seam, shape it, and perform non-destructive testing.

[0013] S4. Pre-machine the inner holes of the upper and lower flange plates;

[0014] S5. Prefabricate guide block one and guide block two separately. First, assemble the back plate, side plate and guide block partition according to the set gap and weld them with multi-layer multi-pass welding. Then install the guide block liner and outer cover plate. After welding, perform non-destructive testing.

[0015] S6. Assemble the upper cylinder and lower cone concentrically with a 4mm assembly gap. After argon arc welding for the root pass, fill the cover pass with carbon dioxide gas shielded welding. After welding, perform X-ray and penetrant testing on the circumferential seam.

[0016] S7. Assemble the upper flange plate, lower flange plate, upper cone partition plate, lower cone partition plate and cone welding gasket in sequence, following the order of inside to outside, and perform non-destructive testing in each welding stage.

[0017] S8. Using special tooling, position the prefabricated guide block one and guide block two on the outside of the upper cylinder. After adjusting to the height required by the drawing, weld the guide blocks to the upper cylinder according to the specified welding sequence. During the welding process, use auxiliary tooling to control deformation. After welding, shape and perform non-destructive testing.

[0018] S9. Using the upper surface of the flange plate as a reference, process the outer diameter and end face of the upper cylinder, the lower end face of the lower cone cylinder, the plane of the upper flange plate, and the plane and thickness of the lower flange plate in sequence.

[0019] In the above-mentioned method for manufacturing a pump tower base, in step S7: after assembling the upper flange plate and the lower flange plate, the upper baffle plate of the cone is first subjected to root pass welding and fill pass welding. After the upper baffle plate of the cone is welded and passes non-destructive testing, the lower baffle plate of the cone is then assembled and welded. Finally, the fill pass welding of the upper flange plate and the lower flange plate is completed.

[0020] In the above-mentioned method for manufacturing a pump tower base, in steps S2, S3, S6, S7 and S8, all full penetration welds are subjected to 100% ultrasonic testing and 100% penetrating testing, and the remaining non-full penetration welds are subjected to 100% penetrating testing; after the overall welding is completed and before machining, the pump tower base is subjected to pickling and passivation treatment, and the internal partition welds are subjected to a helium gas sealing test.

[0021] In the above-mentioned method for manufacturing a pump tower base, in step S1: when the upper cylinder is cut, a machining allowance of 3mm to 4mm is reserved on the outer wall and a machining allowance of 1mm to 2mm is reserved on the inner wall, a cutting allowance of 60mm is added in the height direction, and a machining allowance of 15mm to 20mm is reserved on the upper end face; a machining allowance of 20mm is reserved in the outer diameter direction of the upper flange plate and the lower flange plate respectively.

[0022] In the above-mentioned method for manufacturing a pump tower base, in step S8: the connection weld between the guide block and the upper cylinder is welded synchronously and symmetrically by two welders, using a multi-layer, multi-pass welding process, and auxiliary tooling is added at the connection weld between the guide block side plate and the upper cylinder to control welding deformation.

[0023] In the above-mentioned method for manufacturing a pump tower base, in step S5: first, TIG welding is used to perform 1 to 2 root passes, and then FCAW welding is used to perform 3 to 10 fill passes, with the interpass temperature controlled to not exceed 60°C.

[0024] The present invention also provides a pump tower base to solve the above-mentioned technical problems, which is manufactured using the above-mentioned manufacturing method. The pump tower base includes:

[0025] The vertical support cylinder includes an upper cylinder and a lower cone cylinder that are coaxially welded together, and the circumferential seam between the two has an argon arc welded root layer and a carbon dioxide gas shielded welded filler layer.

[0026] Guide block one and guide block two are welded to the outer surface of the upper cylinder;

[0027] Both guide block one and guide block two include: a back plate; two spaced-apart side plates, one end of which is welded to the back plate and the other end of which is welded to the upper cylinder; and three guide block partitions spaced-apart on the back plate along the axial direction of the upper cylinder, one end of which is welded to the back plate and the other end of which is welded to the upper cylinder, and the end shape is adapted to the outer contour of the upper cylinder.

[0028] An outer cover is disposed at one end of each of the side panels that are opposite to each other;

[0029] A guide block liner is disposed on at least one of the guide block partitions.

[0030] (1) Compared with the prior art, the present invention has the following beneficial effects: by prefabricating, assembling and welding the components of the pump tower base in stages, and interspersing shaping and non-destructive testing after key processes, high controllability and high consistency of structural manufacturing are achieved. In particular, by adopting the welding sequence of "inside first and outside later" and using the upper surface of the upper flange plate as a unified precision machining datum, the cumulative error caused by the confusion of datum in the traditional process is effectively avoided, and the flatness of the upper / lower flange, the coaxiality of the cylinder and the perpendicularity of the end face are significantly improved, thereby ensuring accurate alignment during pump body installation. At the same time, the guide block is accurately positioned and welded to the outside of the upper cylinder with the assistance of special tooling, so that its spatial position meets the design tolerance, providing reliable support for the subsequent guiding or limiting function of the pump tower column.

[0031] (2) By defining the sequence of "welding the upper conical diaphragm first → passing inspection → welding the lower conical diaphragm next → finally completing the flange cover welding" in step S7, the superposition of heat input and local stress concentration caused by simultaneous welding of multiple diaphragms are effectively avoided. This phased, top-down welding strategy facilitates the orderly release of heat, reduces welding deformation, and especially prevents constraint cracks in the lower diaphragm due to the fixed upper structure. At the same time, each critical weld is verified by non-destructive testing before subsequent assembly, eliminating defect transmission from the source and improving the overall rigidity and sealing reliability of the internal reinforcement structure.

[0032] (3) For full penetration welds, a dual composite inspection of 100% ultrasonic (UT) and 100% penetrating (PT) is performed to comprehensively identify internal volumetric / planar defects and surface opening defects; for non-full penetration welds, 100% PT is used to ensure surface integrity. This graded full inspection strategy balances inspection efficiency and safety, and is particularly suitable for high-risk scenarios such as nuclear power and deep sea. In addition, pickling and passivation treatment before machining can thoroughly remove oxide scale and contaminants from the weld area and improve surface corrosion resistance; while helium sealing tests on internal partition welds can verify their airtightness with high sensitivity, prevent corrosion or cross-contamination of media caused by micro-leakage during service, and significantly extend the service life of the pump tower base. Attached Figure Description

[0033] Figure 1 This is a perspective view of a pump tower base according to the present invention.

[0034] Figure 2 yes Figure 1 Top view.

[0035] Figure 3 yes Figure 2Sectional view along the AA direction.

[0036] Figure 4 This is a 3D view of the guide block.

[0037] Figure 5 This is a three-dimensional view of the upper cylinder.

[0038] Figure 6 It is a three-dimensional view of the lower cone, upper flange, and lower flange connected together.

[0039] In the diagram, 100 is the upper cylinder; 110 is the upper cylinder partition; 200 is the lower cone; 210 is the upper cone partition; 220 is the lower cone partition; 230 is the cone welded gasket; 300 is the upper flange; 400 is the lower flange; 500 is the guide block; 510 is the back plate; 520 is the side plate; 530 is the guide block partition; 540 is the guide block gasket; and 550 is the outer cover plate. Detailed Implementation

[0040] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0042] like Figures 1 to 6 As shown, a method for manufacturing a pump tower base according to the present invention includes the following steps:

[0043] S1. Cut the components of the upper cylinder 100, lower cone 200, upper flange 300, lower flange 400, upper cylinder partition 110, upper cone partition 210, lower cone partition 220, cone welding gasket 230, and guide block 500 respectively.

[0044] S2. Assemble and weld the upper cylinder 100 and the upper cylinder partition 110, and then shape and perform non-destructive testing after welding.

[0045] S3. After rolling the lower cone cylinder 200mm, weld the longitudinal seam, shape it, and perform non-destructive testing.

[0046] S4. Pre-machine the inner holes of the upper flange plate 300 and the lower flange plate 400.

[0047] S5. Prefabricate guide block one and guide block two respectively. First, assemble the back plate 510, side plate 520 and guide block partition 530 with the set gap and weld them with multi-layer multi-pass welding. Then install guide block liner 540 and outer cover plate 550. After welding, perform non-destructive testing.

[0048] S6. Assemble the upper cylinder 100 and the lower cone cylinder 200 concentrically with a 4mm assembly gap. After argon arc welding for the root pass, fill the cover pass with carbon dioxide gas shielded welding. After welding, perform X-ray and penetrant testing on the circumferential seam.

[0049] S7. Assemble the upper flange plate 300, lower flange plate 400, upper cone partition plate 210, lower cone partition plate 220 and cone welding gasket 230 in sequence, following the order of inside to outside, and intersperse non-destructive testing in each welding stage.

[0050] S8. Using special tooling, position the prefabricated guide block 1 and guide block 2 on the outside of the upper cylinder 100. After adjusting to the height required by the drawing, weld the guide block 500 to the upper cylinder 100 according to the specified welding sequence. During the welding process, use auxiliary tooling to control deformation. After welding, shape and perform non-destructive testing.

[0051] S9. Using the upper surface of the flange plate 300 as a reference, process the outer diameter and end face of the upper cylinder 100, the lower end face of the lower cone 200, the plane of the upper flange plate 300, and the plane and thickness of the lower flange plate 400 in sequence.

[0052] This solution achieves high controllability and high consistency in structural manufacturing by prefabricating, assembling and welding the various components of the pump tower base (including the cylinder, cone, flange, partition and guide block 500) in stages, and interspersing shaping and non-destructive testing after key processes.

[0053] In particular, the adoption of the "inside first, outside later" welding sequence and the use of the upper 300mm surface of the flange plate as a unified precision machining datum effectively avoids the cumulative errors caused by the confusion of datums in traditional processes, significantly improving the flatness of the upper / lower flanges, the coaxiality of the cylinder, and the perpendicularity of the end face, thereby ensuring precise alignment during pump installation.

[0054] Meanwhile, with the assistance of special tooling, the guide block 500 is precisely positioned and welded to the outside of the upper cylinder 100, so that its spatial position meets the design tolerance, providing reliable support for the subsequent guiding or limiting function of the pump tower column.

[0055] It is worth mentioning that in step S7: after assembling the upper flange plate 300 and the lower flange plate 400, the upper partition plate 210 of the cone is first subjected to root pass welding and fill pass welding. After the upper partition plate 210 of the cone is welded and passes non-destructive testing, the lower partition plate 220 of the cone is then assembled and welded. Finally, the fill pass welding of the upper flange plate 300 and the lower flange plate 400 is completed.

[0056] By limiting the sequence of "welding the upper cone plate 210 first → passing inspection → welding the lower cone plate 220 next → finally completing the flange cover welding" in step S7, the superposition of heat input and local stress concentration caused by simultaneous welding of multiple layers of diaphragms are effectively avoided.

[0057] This phased, top-down welding strategy facilitates the orderly release of heat, reduces welding deformation, and especially prevents constraint cracks in the lower partition due to the fixed upper structure. Furthermore, each critical weld undergoes non-destructive testing before subsequent assembly, eliminating the possibility of defect transmission at the source and improving the overall rigidity and sealing reliability of the internal reinforcement structure.

[0058] In steps S2, S3, S6, S7 and S8, all full penetration welds are subjected to 100% ultrasonic testing and 100% penetrating testing, while the remaining non-full penetration welds are subjected to 100% penetrating testing. After the overall welding is completed and before machining, the pump tower base is pickled and passivated, and the internal partition welds are subjected to a helium gas sealing test.

[0059] For full penetration welds, a dual composite inspection of 100% ultrasonic (UT) and 100% penetrating (PT) can be performed to comprehensively identify internal volumetric / planar defects and surface opening defects; for non-full penetration welds, 100% PT is used to ensure surface integrity.

[0060] This tiered full inspection strategy balances testing efficiency and safety, making it particularly suitable for high-risk scenarios such as nuclear power and deep-sea applications. Furthermore, pickling and passivation treatment before machining thoroughly removes oxide scale and contaminants from the weld area, improving surface corrosion resistance. Helium sealing tests on internal partition welds provide highly sensitive verification of their airtightness, preventing corrosion or cross-contamination caused by micro-leakage during service, and significantly extending the service life of the pump tower base.

[0061] In step S1: When the upper cylinder 100 is cut, a machining allowance of 3mm to 4mm is reserved on the outer wall and a machining allowance of 1mm to 2mm is reserved on the inner wall. A cutting allowance of 60mm is added in the height direction and a machining allowance of 15mm to 20mm is reserved on the upper end face. A machining allowance of 20mm is reserved in the outer diameter direction of the upper flange plate 300 and the lower flange plate 400 respectively.

[0062] Scientifically reserving machining allowances during the material cutting stage (such as 3-4mm for the outer wall and 1-2mm for the inner wall of the upper cylinder 100, 60mm for cutting in the height direction, and 20mm for the outer diameter of each flange, etc.) ensures that there is enough material to compensate for deformation during subsequent rolling, welding and shaping processes, while avoiding material waste and increased processing costs caused by excessive allowances.

[0063] In particular, the 15-20mm allowance reserved on the upper end face provides ample adjustment space for reverse precision machining of the cylinder end face using the upper flange face of S9 as a reference, ensuring that the geometric accuracy of each mating surface meets the high alignment requirements and improving the overall manufacturing yield.

[0064] In step S8: the connection weld between the guide block 500 and the upper cylinder 100 is welded synchronously and symmetrically by two welders, using a multi-layer, multi-pass welding process, and auxiliary tooling is added at the connection weld between the guide block 500 side plate 520 and the upper cylinder 100 to control welding deformation.

[0065] At the weld connecting the guide block 500 and the upper cylinder 100, two welders simultaneously and symmetrically perform welding. Combined with multi-layer, multi-pass welding techniques and specialized auxiliary tooling, this effectively counteracts angular and bending deformations caused by welding thermal stress, ensuring that the guide block 500 maintains the height and posture accuracy required in the drawings after welding. This measure is particularly suitable for connections of thick plates with high rigidity and strong restraint, preventing the guide block 500 from tilting or the V-groove from shifting due to unilateral heat input, thereby ensuring the smoothness and repeatability of the pump tower column's sliding or positioning.

[0066] In step S5: First, use TIG welding to perform 1 to 2 root passes, then use FCAW welding to perform 3 to 10 fill passes, with the interpass temperature controlled to not exceed 60°C.

[0067] In the prefabrication welding of guide block 500, a composite welding process of TIG welding root pass (1-2 passes) + FCAW fill pass (3-10 passes) is adopted to give full play to the advantages of TIG welding, such as stable weld pool, beautiful shape and reliable root penetration, and ensure that there are no defects such as incomplete fusion and porosity in the root pass; FCAW has the characteristics of high deposition efficiency and strong wind resistance, and is suitable for multi-layer fill.

[0068] Meanwhile, strictly controlling the interpass temperature to ≤60℃ effectively suppressed grain coarsening and residual stress accumulation in the heat-affected zone, ensuring the mechanical properties of the weld and reducing the overall deformation of the guide block 500, laying a good foundation for subsequent gasket installation and finishing.

[0069] This solution also proposes a pump tower base, which is manufactured using the above-mentioned manufacturing method. The pump tower base includes: a vertical support cylinder, comprising an upper cylinder 100 and a lower cone cylinder 200 coaxially welded together, with the circumferential seam between the two having an argon arc welded bottom layer and a carbon dioxide gas shielded welded filling layer.

[0070] Guide block one and guide block two are welded to the outer surface of the upper cylinder 100;

[0071] Both guide block one and guide block two include: a back plate 510; two spaced-apart side plates 520, one end of which is welded to the back plate 510 and the other end of which is welded to the upper cylinder 100; and three guide block partitions 530 spaced-apart on the back plate 510 along the axial direction of the upper cylinder 100, one end of which is welded to the back plate 510 and the other end of which is welded to the upper cylinder 100, and the end shape is adapted to the outer contour of the upper cylinder 100.

[0072] An outer cover plate 550 is disposed at one of the opposite ends of each of the side plates 520;

[0073] Guide block liner 540 is disposed on at least one of the guide block partitions 530.

[0074] The pump tower base provided in this solution, through the aforementioned high-precision manufacturing method, achieves a structurally integrated and reliable support component. Its vertical support cylinder employs a composite weld with argon arc welding for the root pass and CO2 gas shielded welding for the fill pass, possessing both excellent root forming and efficient filling capabilities, resulting in high circumferential weld strength and good sealing. Guide blocks one and two are directly welded to the outer surface of the upper cylinder 100, and together with the back plate 510, side plate 520, multiple partitions, and outer cover plate 550, form a closed box-type structure with extremely high overall rigidity. Each welded end is adapted to the outer contour of the upper cylinder 100, achieving surface contact force transmission and avoiding stress concentration.

[0075] The guide block gasket 540 further provides wear resistance, friction reduction, or cushioning. This structure not only simplifies on-site installation (requiring no additional supports) but also ensures stable guiding function under long-term vibration and thermal cycling conditions, significantly improving the operational safety and maintenance convenience of the pump tower system.

[0076] In summary, this solution provides a high-precision, high-reliability pump tower base manufacturing method and the pump tower base made therefrom. By scientifically planning the blanking allowance, staged prefabrication and assembly, strictly controlling the welding sequence and process parameters (such as TIG root pass + FCAW fill pass, two-person symmetrical welding, interpass temperature ≤60℃), and combining with special tooling to effectively suppress welding deformation, the structural dimensional stability and geometric accuracy are significantly improved.

[0077] The entire process follows a quality control strategy of "inside first, then outside, and step-by-step testing". 100% ultrasonic and penetrant testing is carried out on key welds, supplemented by pickling and passivation and helium sealing tests to ensure that the product meets the stringent requirements in terms of strength, sealing and corrosion resistance.

[0078] Ultimately, the upper surface of the flange plate 300 is used as a unified precision machining datum to achieve high-precision collaborative machining of all mating surfaces, ensuring the coaxiality and perpendicularity of the pump body installation. The resulting pump tower base integrates the guide block with the outer side of the upper cylinder 100, forming a rigid and reliable guiding structure. This not only simplifies on-site installation but also improves the stability, safety, and maintenance convenience of the pump tower system during long-term operation. It is particularly suitable for fields with extremely high requirements for structural integrity and service reliability, such as nuclear power, marine engineering, and high-end chemical engineering.

[0079] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0081] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for manufacturing a pump tower base, characterized in that, Including the following steps: S1. Cut the components of the upper cylinder, lower cone, upper flange, lower flange, upper cylinder partition, upper cone partition, lower cone partition, cone welding gasket, and guide block respectively. S2. Assemble and weld the upper cylinder body and the upper cylinder body partition, and then shape and perform non-destructive testing after welding. S3. After rolling the lower cone, weld the longitudinal seam, shape it, and perform non-destructive testing. S4. Pre-machine the inner holes of the upper and lower flange plates; S5. Prefabricate guide block one and guide block two separately. First, assemble the back plate, side plate and guide block partition according to the set gap and weld them with multi-layer multi-pass welding. Then install the guide block liner and outer cover plate. After welding, perform non-destructive testing. S6. Assemble the upper cylinder and lower cone concentrically with a 4mm assembly gap. After argon arc welding for the root pass, fill the cover pass with carbon dioxide gas shielded welding. After welding, perform X-ray and penetrant testing on the circumferential seam. S7. Assemble the upper flange plate, lower flange plate, upper cone partition plate, lower cone partition plate and cone welding gasket in sequence, following the order of inside to outside, and perform non-destructive testing in each welding stage. S8. Using special tooling, position the prefabricated guide block one and guide block two on the outside of the upper cylinder. After adjusting to the height required by the drawing, weld the guide blocks to the upper cylinder according to the specified welding sequence. During the welding process, use auxiliary tooling to control deformation. After welding, shape and perform non-destructive testing. S9. Using the upper surface of the flange plate as a reference, process the outer diameter and end face of the upper cylinder, the lower end face of the lower cone cylinder, the plane of the upper flange plate, and the plane and thickness of the lower flange plate in sequence.

2. The method for manufacturing a pump tower base as described in claim 1, characterized in that, In step S7: After assembling the upper flange plate and the lower flange plate, the upper partition plate of the cone is first subjected to root pass welding and fill pass welding. After the upper partition plate of the cone is welded and passes non-destructive testing, the lower partition plate of the cone is then assembled and welded. Finally, the fill pass and cover pass welding of the upper flange plate and the lower flange plate are completed.

3. The method for manufacturing a pump tower base as described in claim 1, characterized in that: In steps S2, S3, S6, S7 and S8, all full penetration welds are subjected to 100% ultrasonic testing and 100% penetrating testing, while the remaining non-full penetration welds are subjected to 100% penetrating testing. After the overall welding is completed and before machining, the pump tower base is pickled and passivated, and the internal partition welds are subjected to a helium gas sealing test.

4. The method for manufacturing a pump tower base as described in claim 1, characterized in that, In step S1: when the upper cylinder is cut, a machining allowance of 3mm to 4mm is reserved on the outer wall and 1mm to 2mm is reserved on the inner wall. A cutting allowance of 60mm is added in the height direction. A machining allowance of 15mm to 20mm is reserved on the upper end face. A machining allowance of 20mm is reserved in the outer diameter direction of the upper flange plate and the lower flange plate.

5. The method for manufacturing a pump tower base as described in claim 1, characterized in that, In step S8: the connection weld between the guide block and the upper cylinder is welded synchronously and symmetrically by two welders, using a multi-layer, multi-pass welding process, and auxiliary tooling is added at the connection weld between the guide block side plate and the upper cylinder to control welding deformation.

6. The method for manufacturing a pump tower base as described in claim 1, characterized in that, In step S5: First, use TIG welding to perform 1 to 2 root passes, then use FCAW welding to perform 3 to 10 fill passes, with the interpass temperature controlled to not exceed 60°C.

7. A pump tower base, manufactured using the method described in any one of claims 1-6, characterized in that, The pump tower base includes: The vertical support cylinder includes an upper cylinder and a lower cone cylinder that are coaxially welded together, and the circumferential seam between the two has an argon arc welded root layer and a carbon dioxide gas shielded welded filler layer. Guide block one and guide block two are welded to the outer surface of the upper cylinder; Both guide block one and guide block two include: a back plate; two spaced-apart side plates, one end of which is welded to the back plate and the other end of which is welded to the upper cylinder; and three guide block partitions spaced-apart on the back plate along the axial direction of the upper cylinder, one end of which is welded to the back plate and the other end of which is welded to the upper cylinder, and the end shape is adapted to the outer contour of the upper cylinder. An outer cover is disposed at one end of each of the side panels that are opposite to each other; A guide block liner is disposed on at least one of the guide block partitions.

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