Method of manufacturing helical baffles

Abstract

The application discloses a manufacturing method of a spiral baffle plate, which adopts a casting process to integrally form a spiral baffle plate unit, and then splices the integrally formed spiral baffle plate unit to form a large-diameter thin-wall spiral baffle plate which is radially continuous; and heat exchange pipe holes on a plate body of the spiral baffle plate unit are integrally formed in the casting process, and the plate body of the spiral baffle plate does not need to be further opened to form the heat exchange pipe holes. Compared with the production and processing method of the existing spiral baffle plate, the method simplifies the process steps, greatly improves the production efficiency of the spiral baffle plate, and is particularly suitable for manufacturing a spiral heat exchange plate with a small central hole or even without a central hole, and has small operation difficulty, short time consumption and high qualified rate.

Description

Technical Field

[0001] This invention relates to the field of thermochemical reaction technology, and more specifically to a method for manufacturing a spiral baffle. Background Technology

[0002] The main limiting factor for thermochemical reactions is the heat exchange efficiency between the energy and reagent systems. Higher heat exchange efficiency between the heat transfer fluid and the reagent system leads to better reaction results. Thermochemical reactors are core equipment in the chemical industry. During thermochemical reactions, engineering problems such as strong exothermic reactions, heat removal, backmixing, and leakage are generally present. These issues are key considerations and solutions that need to be addressed during the design and optimization of thermochemical reactors.

[0003] Heat exchangers, as devices that transfer heat from hot fluids to cold fluids, are widely used in many industries such as petroleum, chemical, and food processing. Among them, shell-and-tube heat exchangers are one of the most commonly used heat exchangers due to their excellent heat exchange performance. In shell-and-tube heat exchangers, the shell side is usually the weakest link. To improve the efficiency of the heat exchanger, the industry generally introduces baffles. However, traditional bow-shaped baffles have defects such as large pressure drop, flow blind zones, and easy fouling in the blind zones, resulting in poor heat exchange performance. In recent years, bow-shaped baffles have been gradually replaced by spiral baffles. Spiral baffles overcome the above-mentioned defects of bow-shaped baffles. However, spiral baffles are continuous thin-walled spiral curved plates, and heat exchange tube holes that can be opened on the plate body to accommodate tube bundles need to be made. Therefore, the processing of spiral baffles is extremely difficult. Currently, most manufacturers produce spiral baffle plates using stretching or molding methods, and then drill holes for heat exchange tubes into the plates. This production method is complex, time-consuming, and does not effectively improve production efficiency. Especially for spiral baffle heat exchangers with small or no central holes, the central spiral line tends to be straight or nearly straight. During the stretching or molding process, tearing in the central area is easily caused, requiring repeated welding repairs. This results in high forming difficulty, long processing time, and a low yield rate. Furthermore, when drilling heat exchange tube holes in the central region of a spiral baffle heat exchange plate where the central spiral line tends to be straight or is straight, the slope of this region is large and the hole spacing of the heat exchange tube holes varies too much. Therefore, the heat exchange tube holes in this region cannot be drilled by laser cutting and must be drilled by wire cutting. However, wire cutting is less efficient and takes longer than the time required for stretching or molding the spiral baffle plate, which further reduces the production efficiency of the spiral baffle plate.

[0004] In order to reduce the manufacturing difficulty of spiral baffles and improve their processing efficiency, it is urgent to provide a manufacturing method for spiral baffles to solve the technical problems of high manufacturing difficulty and low production efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a method for manufacturing a spiral baffle. By combining the casting process with the manufacturing process of the spiral baffle, the production efficiency of the spiral baffle is greatly improved, and the production process is simple and easy to operate, thus solving the technical problems of high manufacturing difficulty and low production efficiency of existing spiral baffles.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a method for manufacturing a spiral baffle, which includes the following specific steps:

[0007] At least one spiral baffle unit is cast using a casting process.

[0008] The cast spiral baffle units are spliced ​​together to form a radially continuous spiral baffle.

[0009] Preferably, each spiral baffle unit is cast with heat exchange tube holes.

[0010] Preferably, the spiral baffle unit is a spiral baffle sub-plate and / or a spiral baffle path divider plate, wherein the rotation angle of the spiral baffle sub-plate is less than or equal to 360°, and the rotation angle of the spiral baffle path divider plate is greater than or equal to 360°.

[0011] Preferably, the manufacturing method of the spiral baffle includes the following specific steps:

[0012] Multiple spiral baffle plates are cast using a casting process;

[0013] Multiple spiral baffle plates are spirally spliced ​​together along the axial direction to form a radially continuous spiral baffle plate.

[0014] Preferably, the manufacturing method of the spiral baffle includes the following specific steps:

[0015] Multiple spiral baffle plates are cast using a casting process, and the inner and outer diameters of the multiple spiral baffle plates are configured to match each other.

[0016] Multiple spiral baffles are joined together along the same spiral curvature to form a radially continuous spiral baffle.

[0017] Preferably, the manufacturing method of the spiral baffle includes the following specific steps:

[0018] Multiple sets of spiral baffle plates are cast using a casting process;

[0019] Each set of spiral baffle plates is spirally spliced ​​along the axial direction to form a spiral baffle plate; the inner and outer diameters of multiple spiral baffle plates are arranged in a coordinated manner.

[0020] Multiple spiral baffles are joined together along the same spiral curvature to form a radially continuous spiral baffle.

[0021] Preferably, the manufacturing method of the spiral baffle includes the following specific steps:

[0022] At least one set of spiral baffle plates shall be cast using a casting process.

[0023] Each set of spiral baffle plates is spirally spliced ​​together along the axial direction to form a spiral baffle plate.

[0024] At least one spiral baffle plate is cast using a casting process.

[0025] The inner and outer diameters of the multiple spiral baffles are arranged in a coordinated manner, and the multiple spiral baffles are spliced ​​together along the same spiral curvature to form a radially continuous spiral baffle.

[0026] Preferably, the manufacturing method of the spiral baffle includes the following specific steps:

[0027] At least one spiral baffle casting unit is cast using a casting process.

[0028] At least one non-cast spiral baffle unit is manufactured using a stretching or molding process;

[0029] By splicing together cast spiral baffle units and non-cast spiral baffle units, a radially continuous spiral baffle is formed.

[0030] Preferably, the spiral baffle casting unit cast using the casting process is a spiral baffle sub-plate and / or a spiral baffle diameter dividing plate.

[0031] Preferably, before splicing the cast spiral baffle unit and the non-cast spiral baffle unit, the heat exchange tube holes of the non-cast spiral baffle unit are opened using laser cutting technology.

[0032] Compared with the prior art, the beneficial effects of the present invention include:

[0033] This invention discloses a method for manufacturing a spiral baffle plate. The method involves integrally forming spiral baffle plate units through a casting process, and then assembling these integrally cast units to form a radially continuous, large-diameter, thin-walled spiral baffle plate. Furthermore, the heat exchange tube holes on the spiral baffle plate unit are integrally formed during the casting process, eliminating the need for additional drilling of heat exchange tube holes in the plate itself. Compared to existing spiral baffle plate manufacturing methods, this method simplifies the process steps and significantly improves production efficiency. It is particularly suitable for manufacturing spiral baffle heat exchange plates with small or even no central hole, offering advantages such as low operational difficulty, short processing time, and high yield.

[0034] The present invention discloses a method for manufacturing a spiral baffle. In the production process of a large-diameter thin-walled spiral baffle, at least one spiral baffle casting unit is cast using a casting process, and at least one spiral baffle non-cast unit is manufactured using a stretching or molding process. The spiral baffle casting unit and the spiral baffle non-cast unit are then spliced ​​together to form a radially continuous spiral baffle. By combining the casting process with the stretching or molding process, the production efficiency of the spiral baffle can be further improved. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of one embodiment of the manufacturing method of the spiral baffle described in this invention.

[0036] Figure 2 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0037] Figure 3 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0038] Figure 4 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0039] Figure 5 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0040] Figure 6 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0041] Figure 7 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0042] Figure 8 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0043] Figure 9 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0044] Figure 10 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0045] Figure 11 This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention.

[0046] Figure 12This is a schematic diagram of another embodiment of the manufacturing method of the spiral baffle described in this invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0048] Currently, most manufacturers produce spiral baffle plates using stretching or molding methods, and then perforate the plates for heat exchange tubes. This production method is complex, time-consuming, and cannot effectively improve production efficiency. Furthermore, because the spiral baffle plates are continuous, large-diameter, thin-walled spiral curved panels, they cannot be integrally formed using casting processes.

[0049] Based on this, the present invention provides a method for manufacturing a spiral baffle, which includes the following specific steps:

[0050] S1. Cast at least one spiral baffle unit using a casting process;

[0051] S2. The cast spiral baffle units are spliced ​​together to form a radially continuous spiral baffle.

[0052] It is understood that the aforementioned casting processes include, but are not limited to, sand casting, investment casting, pressure casting, metal mold casting, and lost foam casting. By manufacturing a casting mold, molten metal is poured into the mold, and after cooling, a one-piece cast spiral baffle unit is obtained. These one-piece cast spiral baffle units are then assembled to form a radially continuous large-diameter thin-walled spiral baffle. The one-piece casting process for the spiral baffle unit eliminates the steps of blanking, misalignment, stretching, or pressing in existing stretching or pressing processes, simplifying the process and greatly improving the production efficiency of spiral baffles.

[0053] In addition, the casting process can directly cast spiral baffle plate units with a central spiral line that tends to be straight or is straight. By splicing, spiral baffle heat exchange plates with small or even no central holes can be obtained. Compared with the production of spiral baffle heat exchange plates with small or even no central holes by stretching or molding, it is easier to operate, less time-consuming and has a higher yield.

[0054] It should be further explained that each spiral baffle unit has heat exchange tube holes cast on it. That is, during the integral casting process of the spiral baffle unit, the heat exchange tube holes on the unit body are also cast integrally, eliminating the need to drill holes in the spiral baffle body itself. Especially for spiral baffle heat exchangers with small or no central hole, casting the central area's heat exchange tube holes solves the problem of low efficiency caused by the need for wire cutting to drill holes due to large variations in hole spacing, further improving the production efficiency of spiral baffles.

[0055] The spiral baffle unit comprises a spiral baffle sub-plate and / or a spiral baffle diameter plate, wherein the rotation angle of the spiral baffle sub-plate is less than or equal to 360°, and the rotation angle of the spiral baffle diameter plate is greater than or equal to 360°. The spiral baffle can be formed by splicing spiral baffle sub-plates, by splicing spiral baffle diameter plates, or by splicing spiral baffle sub-plates and spiral baffle diameter plates together. Correspondingly, the spiral baffle can be formed by splicing spiral baffle sub-plates along the spiral rotation direction of the plate body, by splicing spiral baffle diameter plates along the spiral rotation direction of the plate body or along the same spiral curvature (internal and external fit), or by splicing spiral baffle sub-plates and spiral baffle diameter plates along the spiral rotation direction of the plate body or along the same spiral curvature (internal and external fit).

[0056] like Figure 1 As shown, in a preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0057] S1. Multiple spiral baffle plates are cast using a casting process;

[0058] S2. Multiple spiral baffle plates are spirally spliced ​​together along the axial direction to form a radially continuous spiral baffle plate.

[0059] like Figure 1 As shown, the spiral baffle is formed by splicing multiple spiral baffle plates along the spiral rotation direction of the plate body. The spiral baffle plate has multiple heat exchange tube holes distributed on its plate body, and the heat exchange tube holes are integrally cast with the spiral baffle plate body.

[0060] like Figure 2 As shown, in a preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0061] S1. Multiple spiral baffle plates are cast using a casting process;

[0062] S2. Multiple spiral baffle plates are spirally spliced ​​together along the axial direction to form a radially continuous spiral baffle plate.

[0063] like Figure 2As shown, the spiral baffle is formed by splicing multiple spiral baffle plates along the spiral rotation direction of the plate body. The spiral baffle plate has multiple heat exchange tube holes distributed on its plate body, and the heat exchange tube holes are integrally cast with the spiral baffle plate body.

[0064] like Figure 3 As shown, in another preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0065] S1. Multiple spiral baffle plates are cast using a casting process, and the inner and outer diameters of the multiple spiral baffle plates are set to match each other.

[0066] S2. Multiple spiral baffle plates are joined together along the same spiral curvature to form a radially continuous spiral baffle plate.

[0067] like Figure 3 As shown, the spiral baffle is formed by splicing together multiple spiral baffle plates with matching inner and outer diameters along the same spiral curvature. The spiral baffle plate has multiple heat exchange tube holes distributed on its plate body, and the heat exchange tube holes are integrally cast with the spiral baffle plate body.

[0068] like Figure 4 As shown, in another preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0069] S1. Multiple sets of spiral baffle plates are cast using a casting process;

[0070] S2. Each set of spiral baffle plates is spirally spliced ​​along the axial direction to form a spiral baffle plate; the inner and outer diameters of multiple spiral baffle plates are set in a coordinated manner.

[0071] S3. Multiple spiral baffle plates are joined together along the same spiral curvature to form a radially continuous spiral baffle plate.

[0072] like Figure 4As shown, the entire spiral baffle is formed by splicing spiral baffle sub-plates. First, multiple spiral baffle plates with matching inner and outer diameters are formed by splicing the spiral baffle sub-plates. Then, these spiral baffle plates are spliced ​​together along the same spiral curvature to form the spiral baffle. Preferably, in adjacent spiral baffle plates, the outer edge heat exchange tube hole of the inner ring spiral baffle plate is a half-hole, and the inner edge heat exchange tube hole of the outer ring spiral baffle plate is also a half-hole that matches the outer edge heat exchange tube hole of the inner ring spiral baffle plate. Therefore, when adjacent spiral baffle plates are spliced ​​together, the outer edge heat exchange tube hole of the inner ring spiral baffle plate matches the inner edge heat exchange tube hole of the outer ring spiral baffle plate to form a circular heat exchange tube hole. This matching arrangement of heat exchange tube holes strengthens the connection between adjacent spiral baffle plates by utilizing heat exchange tubes passing through the heat exchange tube holes.

[0073] During the casting and assembly process, spiral baffles exhibit various deformation modes. Besides using spiral baffle sub-plates or spiral baffle diameter plates individually to form spiral baffles, spiral baffle sub-plates and spiral baffle diameter plates can also be combined to obtain spiral baffles, depending on production needs. The manufacturing method of spiral baffles includes the following specific steps:

[0074] S1. At least one set of spiral baffle plates shall be cast using a casting process;

[0075] S2. Spirally connect each set of spiral baffle plates along the axial direction to form a spiral baffle plate.

[0076] S3. Cast at least one spiral baffle plate using a casting process;

[0077] S4. The inner and outer diameters of multiple spiral baffles are matched and spliced ​​together along the same spiral curvature to form a radially continuous spiral baffle.

[0078] Specifically, in a preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0079] S1. Cast at least one internal spiral baffle plate using casting technology;

[0080] S2. Cast at least one set of external spiral baffle plates using a casting process, and spirally splice each set of external spiral baffle plates along the axial direction to form an external spiral baffle plate; the inner edge of the external spiral baffle plate is matched with the outer edge of the inner spiral baffle plate.

[0081] S3. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0082] like Figure 5As shown, the spiral baffle is formed by combining spiral baffle sub-plates and spiral baffle diameter plates. Specifically, it is formed by splicing together multiple spiral baffle diameter plates with mutually cooperating inner and outer diameters along the same spiral curvature. The outer edge of the inner spiral baffle diameter plate is spliced ​​together with the inner edge of the outer spiral baffle diameter plate. The plate body of the outer spiral baffle diameter plate is formed by splicing together multiple outer spiral baffle sub-plates.

[0083] In another preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0084] S1. Cast at least one set of internal spiral baffle plates using casting technology, and spirally splice each set of internal spiral baffle plates along the axial direction to form an internal spiral baffle plate.

[0085] S2. Cast at least one outer spiral baffle plate using a casting process, with the inner edge of the outer spiral baffle plate matching the outer edge of the inner spiral baffle plate.

[0086] S3. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0087] like Figure 6 As shown, the spiral baffle is formed by splicing together multiple spiral baffle plates with matching inner and outer diameters along the same spiral curvature. The outer edge of the inner spiral baffle plate is spliced ​​together with the inner edge of the outer spiral baffle plate. The plate body of the inner spiral baffle plate is formed by splicing together multiple inner spiral baffle sub-plates.

[0088] By casting modular structures and then assembling them to form a spiral baffle, a breakthrough in casting technology is achieved, solving the problems of high operational difficulty, long manufacturing time, and low yield rate associated with existing spiral baffle heat exchangers that have small or no central holes. Furthermore, the heat exchange tube holes are integrally cast, directly eliminating the original hole-opening step and further improving the production efficiency of the spiral baffle.

[0089] Furthermore, in the production process of large-diameter spiral baffles, based on production needs or cost control, casting processes can be combined with stretching or molding processes; that is, the manufacturing method of spiral baffles includes the following specific steps:

[0090] S1. At least one spiral baffle casting unit is cast using a casting process; wherein, the spiral baffle casting unit is a spiral baffle sub-plate and / or a spiral baffle diameter dividing plate;

[0091] S2. Manufacture at least one non-cast spiral baffle unit using a stretching or molding process;

[0092] S3. The cast spiral baffle unit and the non-cast spiral baffle unit are spliced ​​together to form a radially continuous spiral baffle. Before splicing the cast spiral baffle unit and the non-cast spiral baffle unit, the heat exchange tube holes of the non-cast spiral baffle unit are opened by laser cutting process.

[0093] Specifically, the large-diameter spiral baffle includes at least one inner spiral baffle plate and at least one outer spiral baffle plate. One of the inner and outer spiral baffle plates is cast using a casting process, while the other is manufactured using a stretching or molding process. Finally, the outer spiral baffle plate is joined to the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle. Before joining the inner and outer spiral baffle plates, laser-drilled holes are made in the plates manufactured using the stretching or molding process.

[0094] like Figure 7 As shown, in a preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0095] S1. At least one inner spiral baffle plate is manufactured using a stretching or molding process, wherein the outer edge of the inner spiral baffle plate is fitted with the inner edge of the outer spiral baffle plate.

[0096] S2. Cast at least one external spiral baffle plate using a casting process;

[0097] S3. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0098] The heat exchange tube holes on the outer spiral baffle plate are integrally cast with the plate body. The heat exchange tube holes on the inner spiral baffle plate, manufactured using stretching or molding processes, can be drilled using laser drilling before splicing the inner and outer spiral baffle plates; alternatively, they can be drilled after splicing. This method of splicing first and then drilling allows the laser to more accurately lock onto the center point of the spiral baffle plate, resulting in higher laser drilling precision.

[0099] The external spiral baffle plate in the above scheme can be formed by splicing together multiple external spiral baffle sub-plates, as shown in the following figure. Figure 8 As shown, in another preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0100] S1. At least one inner spiral baffle plate is manufactured using a stretching or molding process, wherein the outer edge of the inner spiral baffle plate is fitted with the inner edge of the outer spiral baffle plate.

[0101] S2. At least one set of external spiral baffle plates shall be cast using a casting process;

[0102] S3. Spirally connect each set of external spiral baffle plates along the axial direction to form an external spiral baffle plate.

[0103] S4. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0104] For large-diameter spiral baffles, the curvature of their outer edge surfaces is relatively low, allowing for direct laser drilling of the heat exchange tube holes. Laser drilling offers high efficiency and precision. Furthermore, due to the large central hole of the outer spiral baffle plate, stretching or molding processes are highly efficient for production. Therefore, in the production of large-diameter spiral baffles, using casting to produce the inner spiral baffle plate and stretching or molding to produce the outer spiral baffle plate can further improve the production efficiency of spiral baffles.

[0105] like Figure 9 As shown, in a preferred embodiment, the method for manufacturing the spiral baffle includes the following specific steps:

[0106] S1. Cast at least one internal spiral baffle plate using casting technology;

[0107] S2. At least one outer spiral baffle plate is manufactured using a stretching or molding process, wherein the inner edge of the outer spiral baffle plate is fitted with the outer edge of the inner spiral baffle plate.

[0108] S3. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0109] like Figure 9 As shown, the heat exchange tube holes on the inner spiral baffle plate are integrally cast with the plate body. Before splicing the inner spiral baffle plate with the outer spiral baffle plate, the heat exchange tube holes are drilled in the outer spiral baffle plate.

[0110] for Figure 9 The outer spiral baffle plate shown can be used to open the heat exchange tube holes using laser drilling technology before splicing it with the inner spiral baffle plate; alternatively, it can be used after splicing it with the inner spiral baffle plate. The method of splicing first and then opening the holes allows the laser to more accurately lock the center point of the spiral baffle plate, resulting in higher laser drilling precision.

[0111] like Figure 10As shown, in another preferred embodiment, it is compared to Figure 9 In a specific embodiment, the difference lies in the following: after splicing the inner spiral baffle plate and the outer spiral baffle plate, a laser drilling process is then used to drill heat exchange tube holes in the outer spiral baffle plate.

[0112] The internal spiral baffle plate in the above scheme can be formed by splicing together multiple internal spiral baffle sub-plates, as shown in the following example. Figure 11 As shown, in another preferred embodiment, the manufacturing method of the spiral baffle includes the following specific steps:

[0113] S1. At least one set of internal spiral baffle plates shall be cast using a casting process;

[0114] S2. Spirally connect each set of inner spiral baffle plates along the axial direction to form an inner spiral baffle plate.

[0115] S3. At least one outer spiral baffle plate is manufactured using a stretching or molding process, wherein the inner edge of the outer spiral baffle plate is fitted with the outer edge of the inner spiral baffle plate.

[0116] S4. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

[0117] like Figure 12 As shown, in another preferred embodiment, it is compared to Figure 11 In a specific embodiment, the difference lies in the following: after splicing the inner spiral baffle plate and the outer spiral baffle plate, a laser drilling process is then used to drill heat exchange tube holes in the outer spiral baffle plate.

[0118] In summary, the manufacturing method of a spiral baffle provided by this invention involves integrally forming a spiral baffle unit through a casting process, and then splicing the integrally cast spiral baffle units to form a radially continuous large-diameter thin-walled spiral baffle. Furthermore, the heat exchange tube holes on the spiral baffle unit are integrally formed during the casting process, eliminating the need for additional drilling of heat exchange tube holes in the spiral baffle body. Compared to existing spiral baffle manufacturing methods, this method simplifies the process steps and greatly improves the production efficiency of spiral baffles. It is particularly suitable for manufacturing spiral baffle heat exchangers with small or even no central hole, offering low operational difficulty, short processing time, and a high yield rate.

[0119] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for manufacturing a spiral baffle, characterized in that, The specific steps include the following: At least one inner spiral baffle plate is manufactured using a stretching or molding process, with the outer edge of the inner spiral baffle plate fitting into the inner edge of the outer spiral baffle plate. At least one external spiral baffle plate is cast using a casting process. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

2. The method for manufacturing the spiral baffle according to claim 1, characterized in that, The heat exchange tube holes on the outer spiral baffle plate are integrally cast with the plate body of the outer spiral baffle plate.

3. A method for manufacturing a spiral baffle, characterized in that, The specific steps include the following: At least one inner spiral baffle plate is manufactured using a stretching or molding process, with the outer edge of the inner spiral baffle plate fitting into the inner edge of the outer spiral baffle plate. At least one set of external spiral baffle plates is cast using a casting process; Each set of external spiral baffle plates is spirally spliced ​​along the axial direction to form an external spiral baffle plate. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

4. A method for manufacturing a spiral baffle, characterized in that, The specific steps include the following: At least one internal spiral baffle plate is cast using a casting process. At least one outer spiral baffle plate is manufactured using a stretching or molding process, with the inner edge of the outer spiral baffle plate fitting into the outer edge of the inner spiral baffle plate. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

5. The method for manufacturing the spiral baffle according to claim 4, characterized in that, The heat exchange tube holes on the inner spiral baffle plate are integrally cast with the plate body of the inner spiral baffle plate.

6. The method for manufacturing the spiral baffle according to claim 5, characterized in that, Before splicing the inner spiral baffle plate and the outer spiral baffle plate, heat exchange tube holes are opened in the outer spiral baffle plate; or after splicing the inner spiral baffle plate and the outer spiral baffle plate, heat exchange tube holes are opened in the outer spiral baffle plate using laser drilling technology.

7. A method for manufacturing a spiral baffle, characterized in that, The specific steps include the following: At least one set of internal spiral baffle plates is cast using a casting process. Each set of internal spiral baffle plates is spirally spliced ​​together along the axial direction to form an internal spiral baffle plate. At least one outer spiral baffle plate is manufactured using a stretching or molding process, with the inner edge of the outer spiral baffle plate fitting into the outer edge of the inner spiral baffle plate. The outer spiral baffle plate is spliced ​​with the inner spiral baffle plate along the spiral curvature of the inner spiral baffle plate to form a radially continuous spiral baffle plate.

8. The method for manufacturing the spiral baffle according to claim 7, characterized in that, After splicing the inner spiral baffle plate and the outer spiral baffle plate, the heat exchange tube holes of the outer spiral baffle plate are opened using laser drilling technology.

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