A processing and welding method for a stainless steel blower

Abstract

The present invention relates to the technical field of blower welding processing, and in particular to a processing and welding method for a stainless steel blower. The present invention includes the following processing and welding steps: S1, welding vertical stiffeners; S2, welding the air inlet plate and the air outlet plate; S3, welding the casing flange; S4, welding the air inlet pipe and the air inlet flange and the air outlet pipe and the air outlet flange; S5, welding horizontal stiffeners; S6, welding the legs and the wall panels. The present invention can shorten the manufacturing cycle of the entire stainless steel blower. After the components of the entire blower in contact with the medium are welded, the pressure holding success rate of the blower can be greatly improved, so as to avoid material waste caused by unsuccessful pressure holding after all components are processed, and improve the success rate of manufacturing stainless steel blowers.

Description

Technical Field

[0001] The present invention relates to the technical field of blower welding processing, and particularly relates to a processing and welding method for a stainless steel blower. Background Art

[0002] Blowers can be classified into centrifugal, Roots, and axial flow types according to the working principle. Their housing structures vary significantly with the type: the centrifugal housing is a spiral volute for guiding high-speed airflows; the axial flow housing is a cylindrical flow channel; the Roots blower consists of two "8"-shaped rotors, synchronous gears, a housing, and a sealing assembly. The rotors rotate through meshing to achieve gas transportation, and it is mainly applied in the transportation of granular materials in pneumatic conveying systems, negative pressure suction, aeration and oxygenation in sewage treatment and environmental protection projects, and oxygenation systems in aquaculture and agriculture, etc.

[0003] As the mainstream processing technology for the Roots blower housing, the casting method realizes integral molding through sand molds or metal molds, which can reduce welding joints and adapt to multi-curved inner cavities. However, due to the irregular shape of the flow-through components and the high shrinkage rate of stainless steel, the quality of the castings is not easy to control. During the casting process, defects such as pores, shrinkage cavities, and cracks may occur, and the cost is relatively high. Summary of the Invention

[0004] In order to avoid the defect problems that easily occur in the processing of the stainless steel blower housing by the casting method and improve the production efficiency and the qualified rate of finished products in welding manufacturing, the present invention provides a processing and welding method for a stainless steel blower.

[0005] A processing and welding method for a stainless steel blower provided by the present invention adopts the following technical solutions:

[0006] A processing and welding method for a stainless steel blower includes the following processing and welding steps:

[0007] S1. Weld the vertical stiffeners;

[0008] S2. Weld the air inlet plate and the air outlet plate;

[0009] S3. Weld the housing flange;

[0010] S4. Weld the air inlet pipe to the air inlet flange and the air outlet pipe to the air outlet flange;

[0011] S5. Weld the horizontal stiffeners;

[0012] S6. Weld the legs and the wall panels.

[0013] Weld the vertical and horizontal stiffeners through S1 and S5, effectively enhancing the overall strength and rigidity of the housing, reducing deformation or damage caused by vibration during operation. The S2 and S4 steps ensure the precise docking of the air inlet plate, air outlet plate and the relevant pipe flanges, contributing to improving airtightness, reducing gas leakage and enhancing work efficiency. Welding the housing flange in S3 provides a reliable connection interface, enhancing the connection stability with external pipes or equipment, while allowing for flexible assembly design. The step of welding the legs and wall panels in S6 provides an additional support structure, ensuring the stability of the blower during installation and operation, reducing tilt or displacement caused by external impact or uneven loads. The welding process designed for the stainless steel material characteristics helps reduce the corrosion risk in the heat-affected zone of welding, maintaining the corrosion resistance and strength of the material and extending the service life. By standardizing the welding steps, rework and adjustment time are reduced, production efficiency is improved, and at the same time, the consistency and quality of mass production are ensured.

[0014] Furthermore, in the S1 step, the vertical stiffener is an arc-shaped stiffener attached to the outer arc surface of the stainless steel blower housing. The specific welding steps include:

[0015] S1.1. Mark the welding positions of the vertical stiffeners at intervals on the outer circle of the stainless steel round pipe.

[0016] S1.2. Slip the annular steel hoop over the outside of the stainless steel round pipe and position it at the marked positions.

[0017] S1.3. Measure the spacing of the annular steel hoops and weld the qualified annular steel hoops to the stainless steel round pipe.

[0018] S1.4. Cut the stainless steel round pipe welded with the annular steel hoops into two halves from the vertical central plane. The two semi-circular pipes formed by cutting the stainless steel round pipe serve as the stainless steel blower housing, and the two semi-arcs formed by cutting the annular steel hoops serve as the vertical stiffeners.

[0019] Through the arc-shaped reinforcing rib design adopted in S1, the force borne by the housing can be better distributed, stress concentration can be reduced, the overall rigidity of the housing and the anti-deformation ability can be enhanced. The selection of the arc-shaped structure can bear internal and external pressures more effectively than the straight-shaped reinforcing rib, thereby improving the durability and stability of the blower. Steps S1.1 and S1.2 ensure the accurate welding position of the vertical reinforcing rib through precise spacing marking and the positioning of the annular steel hoop, avoiding uneven stress caused by position deviation and ensuring the accuracy of the welding process. This enables uniform stress on each part of the blower housing, thereby improving the stability and reliability of the overall structure. In step S1.3, the welding of the annular steel hoop strengthens the connection firmness between the housing and the reinforcing rib, ensuring that joints are not prone to loosening or cracking under high-pressure air flow or long-term operation, thereby effectively enhancing the safety and long-term stable operation ability of the equipment. Step S1.4 cuts the housing with the welded annular steel hoop into two halves, which not only completes the manufacture of the stainless steel blower housing, but also improves the material utilization rate and reduces waste through reasonable cutting and reuse of materials. This cutting method also facilitates subsequent assembly and debugging, improving production efficiency. The fine operation during the welding process helps reduce the corrosion risk in the heat-affected zone and maintain the corrosion resistance of stainless steel. Especially when used in a humid or corrosive environment, it is not easily eroded by the external environment, extending the service life of the equipment.

[0020] Further, in step S2, the air inlet plate and the air outlet plate are respectively welded to the upper and lower edges of the two semi-cylindrical stainless steel blower housings and the two semi-cylindrical stainless steel blower housings are welded into a whole. The air inlet plate and the air outlet plate protrude 5-6 mm from the inner cavity surface of the stainless steel blower housing. Reinforcing ribs are welded on the outer surfaces of the air inlet plate and the air outlet plate, and the reinforcing ribs are aligned and welded with the vertical reinforcing ribs.

[0021] By welding reinforcing ribs on the outer surfaces of the air inlet plate and the air outlet plate and aligning and welding them with the vertical reinforcing ribs, the overall strength and stability of the housing can be significantly improved. The reinforcing ribs provide additional support, reducing deformation or damage that may occur during the operation of the housing. The design that the air inlet plate and the air outlet plate protrude 5-6 mm from the inner cavity surface of the housing is beneficial for measuring the inner hole of the cavity after processing. The welding of the reinforcing ribs not only enhances the rigidity of the plate, but also effectively disperses the stress on the housing, reducing the stress concentration phenomenon and extending the service life of the equipment.

[0022] Further, in step S3, the housing flange is in interference fit with the stainless steel blower housing. The specific steps for welding the housing flange to the stainless steel blower housing include:

[0023] S3.1. Heat the housing flange, and then sleeve the housing flange on the end face of the stainless steel blower housing;

[0024] S3.2. Clamp and fix the casing flange and the stainless - steel blower housing using the upper pressing plate and the lower pressing plate, measure the parallelism between the casing flange and the end face of the stainless - steel blower housing, and adjust the parallelism with the end face of the stainless - steel blower housing by locally knocking on the casing flange;

[0025] S3.3. Weld and fix the casing flange and the stainless - steel blower housing to each other.

[0026] Connecting the casing flange and the stainless - steel blower housing by means of interference fit can ensure a very tight connection between the two, thus greatly enhancing the mechanical strength of the connecting part. The interference fit enables the connection part to have strong tensile, compressive, and shear resistance capabilities, improving the overall structural strength of the equipment. In step S3.2, through measurement and parallelism adjustment, it ensures an accurate fit between the casing flange and the end face of the stainless - steel blower housing. By precisely adjusting the parallelism, problems such as uneven seams during the welding process can be avoided, thereby improving the quality and reliability of the welding. Through this optimized welding process, the stability of the equipment during operation is greatly enhanced, reducing failures caused by loose or insecure connection parts, and ensuring the stability and reliability of the blower during long - term operation.

[0027] Further, in step S4, the specific steps for welding the air inlet pipe and the air inlet flange and the air outlet pipe and the air outlet flange include:

[0028] S4.1. Weld air - inlet strengthening ribs on the outer sides of the air inlet pipe and the air outlet pipe;

[0029] S4.2. Set the air inlet plate horizontally upwards, align and weld the air inlet pipe on the air inlet plate, and weld the air inlet flange on the end face of the air inlet pipe;

[0030] S4.3. Set the air outlet plate horizontally upwards, align and weld the air outlet pipe on the air outlet plate, and weld the air outlet flange on the end face of the air outlet pipe;

[0031] S4.4. Weld the air - inlet strengthening ribs to the air inlet plate and the air outlet plate.

[0032] By welding air - inlet strengthening ribs on the outer sides of the pipes, the anti - bending and anti - torsional capabilities of the pipes are increased. These strengthening ribs ensure that the pipes will not deform due to pressure or vibration during operation, enhancing the overall stability of the equipment. The tight welding between the air inlet and outlet flanges and the pipes ensures the airtightness of the connection, thereby improving the working efficiency of the equipment, reducing gas leakage, and ensuring that the equipment maintains high - efficiency performance during operation. The welding of the strengthening ribs not only enhances the strength of the pipes but also effectively disperses the stress at the connection, reducing the stress concentration phenomenon and lowering the risk of damage at the weld.

[0033] Further, in step S5, tips are provided at both sides of the transverse stiffener. The specific welding steps of the transverse stiffener include:

[0034] S5.1. Plane grooves on the vertical stiffener and the stainless - steel blower housing according to the designed installation position of the transverse stiffener.

[0035] S5.2. Embedded - install the transverse stiffener into the grooves on the vertical stiffener and the stainless - steel blower housing.

[0036] S5.3. Weld and fix the transverse stiffener on the vertical stiffener and the stainless - steel blower housing.

[0037] Through the combination of the transverse stiffener with the vertical stiffener and the stainless - steel blower housing, the strength and stability of the entire structure are effectively enhanced. By planing grooves, the transverse stiffener can be closely fitted and fixed, maximizing the welding fusion effect of the structure. The design and welding of the transverse stiffener can significantly improve the anti - vibration ability of the stainless - steel blower housing. Under the conditions of high load and long - term operation, the transverse stiffener can effectively disperse vibrations, avoiding structural damage and fatigue caused by vibrations, thus ensuring the long - term stable operation of the equipment under complex working conditions. By embedding the transverse stiffener into the grooves, the area of the welded joint is increased, avoiding the occurrence of welding misalignment problems, and the welding effect is more firm. The embedded installation method ensures a larger contact area in the joint area, thus enhancing the strength and durability of the welding. Due to the pre - planing of the grooves and the embedded installation, the welding process becomes more simple and efficient, reducing the adjustment and correction time, and thus improving the production efficiency.

[0038] Further, the legs are welded at both ends of the stainless - steel blower housing on one side of the air outlet plate, and the two welded legs are welded and connected by a reinforcement plate. The specific welding steps of the legs include:

[0039] S6.1.1. Adjust the air outlet plate to face upward and clamp and fix the stainless - steel blower housing through a fixing tooling and a fixing pressing plate.

[0040] S6.1.2. Locate the legs on both sides respectively and measure and align them with each other.

[0041] S6.1.3. Weld and fix the legs, and then weld and fix the reinforcement plate.

[0042] S6.1.4. Dismantle the stainless - steel blower housing from the fixing tooling and the fixing pressing plate.

[0043] Through precise positioning and welding, the legs can provide strong support for the stainless - steel blower. The use of reinforcement plates further enhances the connection between the legs, enabling the overall structure to remain stable under high loads. Through precise alignment and welding, the legs can ensure the balance of the equipment during operation, which helps to reduce vibration and noise during high - speed operation of the equipment and improve work efficiency. The use of fixed jigs and fixed pressing plates ensures the stability of the welding process and avoids welding errors caused by shaking during the welding process.

[0044] Furthermore, the wall panel includes a casing connecting plate, an oil tank connecting plate, wall - panel reinforcing ribs, bearing seat holes, and sealing holes. The specific welding steps of the wall panel are as follows:

[0045] S6.2.1: Clamp and fix the oil tank connecting plate through a welding bracket. The bottom surface of the oil tank connecting plate is placed on the cushion block on the welding bracket, and the edge of the top surface of the oil tank connecting plate is clamped and fixed through a fixed chuck.

[0046] S6.2.2: Vertically arrange the wall - panel reinforcing ribs at intervals and weld them to the oil tank connecting plate.

[0047] S6.2.3: Align and install the casing connecting plate with the oil tank connecting plate and place it on the top of the wall - panel reinforcing ribs. Then install the rotating shaft in the bearing seat hole of the casing connecting plate and the sealing hole of the oil tank connecting plate.

[0048] S6.2.4: Weld and fix the casing connecting plate and the wall - panel reinforcing ribs to each other.

[0049] The welding of the wall - panel reinforcing ribs effectively enhances the structural strength of the oil tank connecting plate. By firmly welding the reinforcing ribs to the oil tank connecting plate, the rigidity and stability of the entire wall panel are significantly improved. The arrangement and welding of the reinforcing ribs provide additional support for the wall panel, ensuring the stability of the wall panel under high - load conditions. The use of tools such as welding brackets and fixed chucks improves the efficiency and quality of the welding process, ensures the stability of the welding process, and reduces welding errors.

[0050] Furthermore, all the welding grooves to be welded adopt V - shaped grooves, and the welding machine uses the following parameters: welding current 330A - 350A, welding machine voltage 35V - 37V, wire diameter φ1.2 - φ1.6, gas flow 20c / min - 25c / min, welding speed 25m / h - 30m / h.

[0051] The V-groove design can provide a larger welding area and good fusion effect. It helps to ensure the full penetration and fusion of the welded metal, thereby improving the strength and consistency of the weld. The V-groove can effectively reduce common defects such as porosity and slag inclusion in welding. By providing a uniform groove angle, it improves the fluidity and gas exhaust performance of the welding molten pool, reducing the probability of defect occurrence. The V-groove is suitable for welding thicker materials, ensuring the welding depth and strength, and meeting the requirements of high-strength structural parts.

[0052] Furthermore, after all components are welded, the integrity is subjected to an airtightness test.

[0053] The airtightness test can effectively detect defects such as tiny cracks, porosity, lack of penetration or lack of fusion in the weld, ensuring that the entire welded structure will not leak gas or liquid under actual working conditions, thereby avoiding potential safety hazards during operation and maintaining the blast efficiency.

[0054] In summary, the present invention has the following beneficial technical effects:

[0055] 1. The present invention can shorten the manufacturing cycle of the entire stainless steel blower. After using the welding method for the components of the blower that come into contact with the medium, the pressure-holding success rate of the blower can be greatly improved, preventing material waste caused by unsuccessful pressure-holding after all components are processed, and increasing the success rate of manufacturing stainless steel blowers.

[0056] 2. Through this improved welding method, combined with precise process steps, while ensuring product performance, it can improve production efficiency, reduce costs, and enhance the quality and reliability of the product. This provides an optimized solution for the production of stainless steel blowers, especially suitable for high-end application fields with high requirements for structural strength, stability, and airtightness.

[0057] 3. Through the refinement and optimization of the welding steps, the manufacturing process of the stainless steel blower has been significantly improved. The precise design and welding of the air inlet plate and the air outlet plate not only improve the airtightness and structural strength of the equipment, but also enhance the overall operating stability and reliability. These optimization measures ensure the high performance and high reliability of the product in actual use.

[0058] 4. Through precise heating, adjusting parallelism, and welding fixation, step S3 provides a reliable and efficient welding solution, enhancing the connection strength and stability between the stainless steel blower housing and the casing flange, improving the durability, airtightness, and appearance quality of the equipment. This process not only reduces the workload of later debugging and maintenance, but also greatly extends the service life of the equipment.

[0059] 5. Through detailed welding steps, especially in the connection of the air inlet pipe and the air outlet pipe to the flange, the working efficiency, airtightness, and structural stability of the equipment are significantly improved.

[0060] 6. Through precise design and welding, the transverse stiffener welding scheme in step S5 significantly improves the structural strength, stability, and anti-vibration ability of the stainless steel blower housing. The embedded installation and welding method not only optimize the firmness of the welded joints but also effectively reduce stress concentration, extend the service life of the equipment. This welding process improves production efficiency and product quality, and has an ideal effect for equipment used in high-load and high-vibration environments.

[0061] 7. The welding of the legs and the reinforcement plates in step S6 significantly improves the support stability and structural strength of the stainless steel blower. Such a design not only improves the durability and working efficiency of the equipment but also optimizes the manufacturing process, and is suitable for high-load and high-requirement industrial application scenarios.

[0062] 8. By adopting a V-shaped groove and precise welding parameter settings, the quality and efficiency of welding can be significantly improved. These settings help ensure the stability of the welding process and the strength of the weld, reduce welding defects, improve production efficiency and product reliability, and are especially suitable for industrial applications that require high-strength and high-quality welding.

[0063] 9. The airtightness test is a key quality control step after the welding of the wall panel structure. It not only verifies the reliability of the welded seal but also ensures the safety and stability of the whole machine operation. Through this test, the product quality grade can be effectively improved to meet the requirements of standard industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic diagram of the assembled structure of the stainless steel blower of the present invention;

[0065] Figure 2 It is a schematic diagram of the welding process of step S1 of the present invention;

[0066] Figure 3 It is a schematic diagram of the cutting process of step S1 of the present invention;

[0067] Figure 4 It is a schematic diagram of the welding process of steps S2 and S3 of the present invention;

[0068] Figure 5 It is a schematic diagram of the welding process of step S4 of the present invention;

[0069] Figure 6 It is a schematic diagram of the welding process of step S5 of the present invention;

[0070] Figure 7 It is a schematic diagram of the leg welding process of S6 of the present invention;

[0071] Figure 8 This is a schematic diagram of the welding process for the S6 housing connecting plate of the present invention;

[0072] Figure 9 This is a schematic diagram of the welding process for the S6 wall panel reinforcing rib of the present invention;

[0073] Figure 10 This is a schematic diagram of the welding process for the S6 fuel tank connecting plate of the present invention.

[0074] Explanation of reference numerals:

[0075] 10. Stainless steel blower housing, 1. Vertical reinforcing rib, 2. Air inlet plate, 21. Reinforcing rib, 3. Air outlet plate, 4. Housing flange, 41. Upper pressing plate, 42. Lower pressing plate, 5. Air inlet pipe, 51. Air inlet flange, 56. Air outlet reinforcing rib, 6. Air outlet pipe, 61. Air outlet flange, 7. Horizontal reinforcing rib, 8. Leg, 81. Reinforcing plate, 82. Fixing tooling, 83. Fixing pressing plate, 9. Wall panel, 91. Housing connecting plate, 92. Fuel tank connecting plate, 93. Wall panel reinforcing rib, 94. Bearing seat hole, 95. Sealing hole, 96. Welding bracket, 97. Spacer block, 98. Fixing chuck, 99. Rotating shaft. Detailed implementation manners

[0076] Next, in conjunction with the attached Figures 1 - 10 , the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0077] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, 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.

[0078] The present invention discloses a processing and welding method for a stainless steel blower. Referring to Figures 1 - 10 , it includes the following processing and welding steps:

[0079] S1. Weld the vertical reinforcing rib 1;

[0080] S2. Weld the air inlet plate 2 and the air outlet plate 3;

[0081] S3. Weld the housing flange 4;

[0082] S4. Weld the air inlet pipe 5 to the air inlet flange 51 and the air outlet pipe 6 to the air outlet flange 61;

[0083] S5. Weld the transverse stiffener 7;

[0084] S6. Weld the support legs 8 and the wall panel 9.

[0085] Before welding, clean and polish the materials to remove surface impurities and maintain surface smoothness and accuracy.

[0086] Chamfer the welding positions of the welded parts to form a V-shaped welding groove.

[0087] Before welding processing, debug the equipment system, including:

[0088] Calibrate the welding power supply system, detect it with a digital welding calibrator, the output voltage error ≤ ±1.5%, and the current ripple coefficient ≤ 5%;

[0089] Debug the wire feeding system, test the dynamic wire feeding accuracy, the speed fluctuation rate ≤ ±2%, the blocking torque ≥ 5 N·m, check the nozzle matching, and the aperture tolerance is the wire diameter + 0.1 mm;

[0090] Debug the shielding gas system, verify the accuracy of the mixer, the Ar / CO2 mixing ratio error ≤ ±0.5%, calibrate the flowmeter, at the 10 L / min range point, the indication error ≤ ±1.5% FS;

[0091] Joint debugging of auxiliary equipment, laser tracking system, the profile tracking accuracy ≤ ±0.05 mm, temperature monitoring module, the infrared thermometer range is 400 - 1200 °C, and the accuracy is ±1%.

[0092] Refer to Figure 1 and Figure 2 , in step S1, the vertical stiffener 1 is an arc-shaped stiffener and is attached to the outer arc surface of the stainless steel blower housing 10. The specific welding steps include:

[0093] S1.1. Mark the welding positions of the vertical stiffener 1 at intervals on the outer circle of the stainless steel round tube;

[0094] S1.2. Slip the annular steel hoop over the outside of the stainless steel round tube and position it at the marked positions;

[0095] S1.3. Measure the spacing of the annular steel hoops and weld the qualified annular steel hoops to the stainless steel round tube;

[0096] S1.4. Cut the stainless - steel round pipe with the welded ring - shaped steel hoop in half from the vertical central plane. The two semi - circular pipes formed by cutting the stainless - steel round pipe serve as the stainless - steel blower housing 10, and the two semi - circular arcs formed by cutting the ring - shaped steel hoop serve as the vertical reinforcing ribs 1.

[0097] Refer to Figure 4 , in step S2, the air inlet plate 2 and the air outlet plate 3 are respectively welded to the upper and lower edges of the two semi - circular - pipe - shaped stainless - steel blower housing 10, and the two semi - circular - pipe - shaped stainless - steel blower housing 10 are welded into a whole;

[0098] The air inlet plate 2 and the air outlet plate 3 protrude 5 - 6 mm from the inner cavity surface of the stainless - steel blower housing 10. Reinforcing ribs 21 are welded on the outer surfaces of the air inlet plate 2 and the air outlet plate 3, and the reinforcing ribs 21 are aligned and welded with the vertical reinforcing ribs 1.

[0099] Refer to Figure 4 , in step S3, the housing flange 4 is in interference fit with the stainless - steel blower housing 10. The specific steps for welding the housing flange 4 to the stainless - steel blower housing 10 include:

[0100] S3.1. Heat the housing flange 4, and then put the housing flange 4 on the end face of the stainless - steel blower housing 10;

[0101] S3.2. Use the upper pressing plate 41 and the lower pressing plate 42 to clamp and fix the housing flange 4 and the stainless - steel blower housing 10, measure the parallelism between the end face of the housing flange 4 and the end face of the stainless - steel blower housing 10, and adjust the parallelism with the end face of the stainless - steel blower housing 10 by locally knocking the housing flange 4;

[0102] S3.3. Weld and fix the housing flange 4 and the stainless - steel blower housing 10 to each other.

[0103] Refer to Figure 5 , in step S4, the specific steps for welding the air inlet pipe 5 with the air inlet flange 51 and the air outlet pipe 6 with the air outlet flange 61 include:

[0104] S4.1. Weld the air - inlet - pipe strengthening ribs 56 on the outer sides of the air inlet pipe 5 and the air outlet pipe 6;

[0105] S4.2. Set the air inlet plate 2 horizontally upward, align and weld the air inlet pipe 5 to the air inlet plate 2, and weld the air inlet flange 51 to the end face of the air inlet pipe 5;

[0106] S4.3. Set the air outlet plate 3 horizontally upward, align and weld the air outlet pipe 6 to the air outlet plate 3, and weld the air outlet flange 61 to the end face of the air outlet pipe 6;

[0107] S4.4. Weld the air outlet reinforcing rib 56 to the air inlet plate 2 and the air outlet plate 3.

[0108] Refer to Figure 6 , in step S5, tips are provided at both sides of the transverse reinforcing rib 7, and the specific welding steps of the transverse reinforcing rib 7 include:

[0109] S5.1. Plane out grooves on the vertical reinforcing rib 1 and the stainless - steel blower housing 10 according to the designed installation position of the transverse reinforcing rib 7;

[0110] S5.2. Inlay and install the transverse reinforcing rib 7 in the grooves on the vertical reinforcing rib 1 and the stainless - steel blower housing 10;

[0111] S5.3. Weld and fix the transverse reinforcing rib 7 to the vertical reinforcing rib 1 and the stainless - steel blower housing 10.

[0112] Refer to Figure 7 , the support legs 8 are welded to both ends of the stainless - steel blower housing 10 on one side of the air outlet plate 3, and the two welded support legs 8 on both sides are welded and connected through a reinforcement plate 81. The specific welding steps of the support legs 8 include:

[0113] S6.1.1. Adjust the air outlet plate 3 to be set upward and fix and clamp the stainless - steel blower housing 10 through a fixing tooling 82 and a fixing pressing plate 83;

[0114] S6.1.2. Position the support legs 8 on both sides respectively and measure and align them with each other;

[0115] S6.1.3. Weld and fix the support legs 8, and then weld and fix the reinforcement plate 81;

[0116] S6.1.4. Remove the stainless - steel blower housing 10 from the fixing tooling 82 and the fixing pressing plate 83.

[0117] Refer to Figures 8 - 10 , the wall panel 9 includes a housing connection plate 91, an oil tank connection plate 92, a wall panel reinforcing rib 93, a bearing seat hole 94 and a sealing hole 95. The specific welding steps of the wall panel 9 include:

[0118] S6.2.1. Clamp and fix the oil tank connection plate 92 through a welding bracket 96, wherein the bottom surface of the oil tank connection plate 92 is placed on a cushion block 97 on the welding bracket 96, and the edge of the top surface of the oil tank connection plate 92 is clamped and fixed through a fixing chuck 98;

[0119] S6.2.2. Vertically arrange the wall panel reinforcing ribs 93 at intervals and weld them to the oil tank connection plate 92;

[0120] S6.2.3. Align and install the housing connection plate 91 and the fuel tank connection plate 92 on the top of the wall panel stiffener 93, and then install the rotating shaft 99 in the bearing seat hole 94 of the housing connection plate 91 and the sealing hole 95 of the fuel tank connection plate 92;

[0121] S6.2.4. Weld and fix the housing connection plate 91 and the wall panel stiffener 93 to each other.

[0122] After all components are welded, conduct an airtightness test on the whole.

[0123] Example 1:

[0124] Including the above technology and supplementing specific processing parameters:

[0125] Refer to Figures 1 - 10 , all the welding grooves to be welded adopt V-shaped grooves, and the following parameters are used for the welding machine:

[0126] Welding current: 330A - 350A;

[0127] Welding machine voltage: 35V - 37V;

[0128] Wire diameter: φ1.2 - φ1.6;

[0129] Gas flow rate: 20c / min - 25c / min;

[0130] Welding speed: 25m / h - 30m / h.

[0131] Example 2:

[0132] Including the above technology and supplementing specific processing material requirements:

[0133] The stainless steel blower housing 10, the air inlet plate 2, the air outlet plate 3, the air inlet pipe 5, the air inlet flange 51, the air outlet pipe 6 and the air outlet flange 61 are made of stainless steel, and the rest are made of carbon steel.

[0134] Example 3:

[0135] Including the above technology and supplementing installation and processing requirements:

[0136] An O-ring sealing structure is padded at the contact between the stainless steel blower housing 10, the housing flange 4 and the wall panel 9.

[0137] Example 4:

[0138] Including the above technology and supplementing welding materials:

[0139] For welding stainless steel and carbon steel, use E309 - 16;

[0140] For welding between 2205 stainless steels, use E2209 - 16;

[0141] For the welding between 304 stainless steels, E308-16 is used;

[0142] For the welding between 316 stainless steels, E316-16 is used;

[0143] For the welding between 304 stainless steel and 316 stainless steel, E316-16 is used;

[0144] For the welding between 2205 stainless steel and 316 stainless steel, E2209-16 is used.

[0145] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the scope defined by the structure of the invention, they shall fall within the protection scope of the present invention.

Claims

1. A processing and welding method for a stainless steel blower, characterized in that, It includes the following processing and welding steps: S1. Weld the vertical stiffeners (1); S1.

1. Mark the welding positions of the vertical stiffeners (1) at intervals on the outer circle of the stainless steel round tube; S1.

2. Put the annular steel hoop on the outside of the stainless steel round tube and position it at the marked positions; S1.

3. Measure the distance between the annular steel hoops, and weld the qualified annular steel hoops on the stainless steel round tube; S1.

4. Cut the stainless steel round tube welded with the annular steel hoop into two halves from the vertical center plane. The two semi-circular tubes formed by cutting the stainless steel round tube serve as the stainless steel blower housing (10), and the two semi-circular arcs formed by cutting the annular steel hoop serve as the vertical stiffeners (1); S2. Weld the air inlet plate (2) and the air outlet plate (3). The air inlet plate (2) and the air outlet plate (3) are respectively welded to the upper and lower edges of the two semi-circular tube-shaped stainless steel blower housings (10) and weld the two semi-circular tube-shaped stainless steel blower housings (10) into a whole; S3. Weld the housing flange (4). The housing flange (4) is welded at the end face of the stainless steel blower housing (10); S4. Weld the air inlet pipe (5) and the air inlet flange (51) and the air outlet pipe (6) and the air outlet flange (61). Set the air inlet plate (2) horizontally upward, align the air inlet pipe (5) and weld it on the air inlet plate (2), weld the air inlet flange (51) on the end face of the air inlet pipe (5), set the air outlet plate (3) horizontally upward, align the air outlet pipe (6) and weld it on the air outlet plate (3), and weld the air outlet flange (61) on the end face of the air outlet pipe (6); S5. Weld the horizontal stiffeners (7), and weld and fix the horizontal stiffeners (7) on the vertical stiffeners (1) and the stainless steel blower housing (10); S6. Weld the legs (8) and the wall panels (9). The legs (8) are welded at both ends of the stainless steel blower housing (10) on one side of the air outlet plate (3). The two welded legs (8) on both sides are welded and connected by a reinforcing plate (81). An O-ring sealing structure is padded at the contact positions of the stainless steel blower housing (10), the housing flange (4) and the wall panel (9).

2. The processing and welding method of a stainless steel blower according to claim 1, characterized in that: In step S2, the air inlet plate (2) and the air outlet plate (3) protrude 5-6 mm from the inner cavity surface of the stainless steel blower housing (10). Reinforcing ribs (21) are welded on the outer surfaces of the air inlet plate (2) and the air outlet plate (3), and the reinforcing ribs (21) are aligned and welded with the vertical stiffeners (1).

3. The processing and welding method of a stainless steel blower according to claim 1, characterized in that: In step S3, the housing flange (4) is in interference fit with the stainless steel blower housing (10). The specific steps for welding the housing flange (4) include: S3.

1. Heat the housing flange (4), and then put the housing flange (4) on the end face of the stainless steel blower housing (10); S3.

2. Clamp and fix the housing flange (4) and the stainless steel blower housing (10) by using the upper pressing plate (41) and the lower pressing plate (42), measure the parallelism between the housing flange (4) and the end face of the stainless steel blower housing (10), and adjust the parallelism with the end face of the stainless steel blower housing (10) by locally knocking the housing flange (4). S3.

3. Weld and fix the housing flange (4) and the stainless steel blower housing (10) to each other.

4. A processing and welding method for a stainless steel blower according to claim 1, characterized in that: In step S4, the specific welding steps of the air inlet pipe (5) and the air inlet flange (51), and the air outlet pipe (6) and the air outlet flange (61) are as follows: S4.

1. Weld the air duct stiffeners (56) on the outer sides of the air inlet pipe (5) and the air outlet pipe (6); S4.

2. Set the air inlet plate (2) horizontally upward, align and weld the air inlet pipe (5) on the air inlet plate (2), and weld the air inlet flange (51) on the end face of the air inlet pipe (5); S4.

3. Set the air outlet plate (3) horizontally upward, align and weld the air outlet pipe (6) on the air outlet plate (3), and weld the air outlet flange (61) on the end face of the air outlet pipe (6); S4.

4. Weld the air duct stiffeners (56) to the air inlet plate (2) and the air outlet plate (3).

5. A processing and welding method for a stainless steel blower according to claim 1, characterized in that: In step S5, tips are provided at both sides of the transverse stiffener (7). The specific welding steps of the transverse stiffener (7) are as follows: S5.

1. Plane grooves on the vertical stiffener (1) and the stainless steel blower housing (10) according to the designed installation position of the transverse stiffener (7); S5.

2. Inset and install the transverse stiffener (7) in the grooves on the vertical stiffener (1) and the stainless steel blower housing (10); S5.

3. Weld and fix the transverse stiffener (7) to the vertical stiffener (1) and the stainless steel blower housing (10).

6. The processing and welding method of a stainless steel blower according to claim 1, characterized in that: The specific welding steps of the support legs (8) are as follows: S6.1.

1. Adjust the air outlet plate (3) to be upward and fix and clamp the stainless steel blower housing (10) through the fixing tooling (82) and the fixing pressing plate (83); S6.1.

2. Position the support legs (8) on both sides respectively and measure and align them with each other; S6.1.

3. Weld and fix the support legs (8), and then weld and fix the reinforcement plate (81); S6.1.

4. Remove the stainless steel blower housing (10) from the fixing tooling (82) and the fixing pressing plate (83).

7. A processing and welding method for a stainless steel blower according to claim 1, characterized in that: The wall panel (9) includes a housing connecting plate (91), an oil tank connecting plate (92), a wall panel stiffener (93), a bearing seat hole (94) and a sealing hole (95). The specific welding steps of the wall panel (9) are as follows: S6.2.

1. Clamp and fix the oil tank connecting plate (92) through the welding bracket (96), wherein the bottom surface of the oil tank connecting plate (92) is placed on the cushion block (97) on the welding bracket (96), and the top edge of the oil tank connecting plate (92) is clamped and fixed through the fixing chuck (98); S6.2.

2. Vertically arrange the wall panel stiffeners (93) at intervals and weld them to the oil tank connecting plate (92); S6.2.

3. Align and install the housing connecting plate (91) and the oil tank connecting plate (92), place them on the top of the wall panel stiffeners (93), and then install the rotating shaft (99) in the bearing seat hole (94) of the housing connecting plate (91) and the sealing hole (95) of the oil tank connecting plate (92); S6.2.

4. Weld and fix the cabinet connecting plate (91) and the wall panel reinforcing rib (93) to each other.

8. A processing and welding method for a stainless steel blower according to any one of claims 1-7, characterized in that: All the welding grooves to be welded adopt V-shaped grooves, and the following parameters are used for the welding machine: Welding current: 330A - 350A; Welding machine voltage: 35V - 37V; Gas flow rate: 20 c / min - 25 c / min; Welding speed: 25 m / h - 30 m / h.

9. The processing and welding method of a stainless steel blower according to claim 1, characterized in that: After all components are welded, perform an airtightness test on the whole.

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